EP1368647A2 - Proteines, genes et leur utilisation pour le diagnostic et le traitement de la reponse vasculaire - Google Patents

Proteines, genes et leur utilisation pour le diagnostic et le traitement de la reponse vasculaire

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Publication number
EP1368647A2
EP1368647A2 EP01272729A EP01272729A EP1368647A2 EP 1368647 A2 EP1368647 A2 EP 1368647A2 EP 01272729 A EP01272729 A EP 01272729A EP 01272729 A EP01272729 A EP 01272729A EP 1368647 A2 EP1368647 A2 EP 1368647A2
Authority
EP
European Patent Office
Prior art keywords
vrpi
vrf
vascular response
fragment
related polypeptide
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP01272729A
Other languages
German (de)
English (en)
Inventor
Eugene H. Herman
Gordon D. Holt
Frank D. Sistare
Jun Zhang
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Oxford Glycosciences UK Ltd
US Department of Health and Human Services
Original Assignee
Oxford Glycosciences UK Ltd
US Department of Health and Human Services
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Filing date
Publication date
Application filed by Oxford Glycosciences UK Ltd, US Department of Health and Human Services filed Critical Oxford Glycosciences UK Ltd
Publication of EP1368647A2 publication Critical patent/EP1368647A2/fr
Withdrawn legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
    • G01N33/48—Biological material, e.g. blood, urine; Haemocytometers
    • G01N33/50—Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing
    • G01N33/5005—Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing involving human or animal cells
    • G01N33/5008—Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing involving human or animal cells for testing or evaluating the effect of chemical or biological compounds, e.g. drugs, cosmetics
    • G01N33/5082—Supracellular entities, e.g. tissue, organisms
    • G01N33/5088—Supracellular entities, e.g. tissue, organisms of vertebrates
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07K—PEPTIDES
    • C07K14/00—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof
    • C07K14/435—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof from animals; from humans
    • C07K14/46—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof from animals; from humans from vertebrates
    • C07K14/47—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof from animals; from humans from vertebrates from mammals
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
    • G01N33/48—Biological material, e.g. blood, urine; Haemocytometers
    • G01N33/50—Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing
    • G01N33/5005—Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing involving human or animal cells
    • G01N33/5008—Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing involving human or animal cells for testing or evaluating the effect of chemical or biological compounds, e.g. drugs, cosmetics
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
    • G01N33/48—Biological material, e.g. blood, urine; Haemocytometers
    • G01N33/50—Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing
    • G01N33/68—Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing involving proteins, peptides or amino acids
    • G01N33/6893—Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing involving proteins, peptides or amino acids related to diseases not provided for elsewhere
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K38/00—Medicinal preparations containing peptides
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2500/00—Screening for compounds of potential therapeutic value
    • G01N2500/20—Screening for compounds of potential therapeutic value cell-free systems
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2550/00—Electrophoretic profiling, e.g. for proteome analysis
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2800/00—Detection or diagnosis of diseases
    • G01N2800/52—Predicting or monitoring the response to treatment, e.g. for selection of therapy based on assay results in personalised medicine; Prognosis

Definitions

  • the present invention relates to the identification of proteins and protein isoforms that are associated with vascular response to endogenous and exogenous effector agents, including its onset and development, and of genes encoding the same, and to their use for clinical screening, diagnosis, prognosis, therapy and prophylaxis, as well as for drug screening and drug development.
  • Blood vessels including the veins, arteries and capillaries, play an essential role in the distribution of molecules throughout the body.
  • the blood vessels also circulate a variety of cells'(e.g., immune cells, erythrocytes, platelets, bone marrow and stem cells).
  • the cells lining the blood vessels respond to the circulating molecules and cells, which are defined herein as "endogenous and exogenous effector agents" for example by rapidly modulating metabolic pathways and by expressing new patterns of protein export and cell surface expression. Any disruptions in vascular responsiveness to environmental changes can lead to serious, often life-threatening, consequences.
  • effector agents are provided herein as examples of, but are not limited to, inducers of vascular responses:
  • chemotherapeutics e.g., a variety of approved and experimental treatments for indications such as cancer
  • drugs of abuse e.g., cocaine, amphetamines
  • neovascularization effector molecules e.g., metaloprotease inhibitors, proteoglycans
  • Blood vessels are architecturally complex and composed of many unique cell types.
  • Vascular-disrupting effector agents may exclusively affect just one of these cell types, or, more commonly, may interfere with several types simultaneously. Thus, affected areas may range from highly focal to diffuse lesions, and may spread or refocus over time.
  • a wide variety of vascular changes are defined herein as examples of, but not limited to, vascular responses to effector agents: Aneurysm; Artherosclerosis; Congestion; Edema; Hemorrhage; Shock; Stenosis; Stroke; Varicose veins; and Vasculitis (angiitis).
  • the non-intrusive assays show poor correlation with vascular histopathology and generally provide no prospective measure of how the vascular response will change over time.
  • the intrusive vascular response assays also suffer from the limitation that they present significant risk to the test subject. Therefore, they generally are not employed unless the subject's life is already under serious threat.
  • the intrusive assays require time-consuming and costly interpretation by expert pathologists, and may also provide ambiguous results if the tissue changes are not homogeneous across the blood vessels relative to the sample examined.
  • vascular response-associated proteins as sensitive and specific biomarkers for the diagnosis, to assess severity and predict the outcome of vascular response in response subjects and, in particular, to allow the screening of drug candidates for their ability to induce a vascular response. Additionally, there is a clear need for new therapeutic agents for vascular response that work quickly, potently, specifically, and with fewer side effects.
  • the present invention provides methods and compositions for clinical screening, diagnosis, prognosis, therapy and prophylaxis of vascular response, in particular, the screening of drug candidates for their ability to induce a vascular response.
  • For monitoring the effectiveness of vascular response treatment for selecting participants in clinical trials, for identifying patients most likely to respond to a particular therapeutic treatment and for screening and development of drugs for treatment of vascular response.
  • a first aspect of the invention provides methods for diagnosis of vascular response that comprise analyzing a sample of body fluid, e.g. blood, by two-dimensional electrophoresis to detect the presence or level of at least one Vascular Response- Associated Feature (VRF), e.g., one or more of the VRFs disclosed herein or any combination thereof.
  • VRF Vascular Response- Associated Feature
  • a second aspect of the invention provides methods for diagnosis of vascular response that comprise detecting in a sample of body fluid, e.g. blood, the presence or level of at least one Vascular Response- Associated Protein Isoform (VRPI), e.g., one or more of the VRPIs disclosed herein or any combination thereof.
  • VRPI Vascular Response- Associated Protein Isoform
  • a third aspect of the invention provides antibodies, e.g. monoclonal and polyclonal antibodies capable of immunospecific binding to a VRPI, e.g., a VRPI disclosed herein.
  • a fourth aspect of the invention provides a preparation comprising an isolated VRPI, i.e., a VRPI free from proteins or protein isoforms having a significantly different isoelectric point or a significantly different apparent molecular weight from the VRPI.
  • kits that may be used in the above recited methods and that may comprise single or multiple preparations, or antibodies, together with other reagents, labels, substrates, if needed, and directions for use.
  • the kits may be used for diagnosis of disease, or may be assays for the identification of new diagnostic and/or therapeutic agents.
  • a sixth aspect of the invention provides methods of treating vascular response, comprising administering to a subject a therapeutically effective amount of an agent that modulates (e.g., upregulates or downregulates) the expression or activity (e.g. enzymatic or binding activity), or both, of a VRF, a VRPI in subjects having vascular response, in order to prevent or delay the onset or development of vascular response, to prevent or delay the progression of vascular response, or to ameliorate the symptoms of vascular response.
  • an agent that modulates e.g., upregulates or downregulates
  • the expression or activity e.g. enzymatic or binding activity
  • a seventh aspect of the invention provides methods of screening for agents that modulate (e.g., upregulate or downregulate) a characteristic of, e.g., the expression or the enzymatic or binding activity, of a VRF, a VRPI, a VRPI analog, or a VRPI- related polypeptide.
  • This aspect of the invention being particularly useful in determining the ability of drug candidates to induce a vascular response.
  • FIG. 1 is a flow chart depicting the characterization of a VRF and relationship of a VRF and VRPI.
  • a VRF may be further characterized as or by a VRPI having a particular peptide sequence associated with its pi and MW.
  • a VRF may comprise one or more VRPIs, which have indistinguishable pi and MWs using the Preferred Technology, but which comprise distinct peptide sequences.
  • the peptide sequence(s) of the VRPI can be utilized to search database(s) for previously-identified proteins comprising such peptide sequence(s). In some instances, it can be ascertained whether a commercially-available antibody exists which may recognize the previously identified protein and/or a variant thereof.
  • the VRPI may correspond to the previously-identified protein, be a variant of the previously identified protein, or be a previously unknown protein.
  • Figure 2 is an image obtained from 2-dimensional electrophoresis of plasma, which has been annotated to identify twelve landmark features, designated FI to FI 1 and F13, and which are illustrative of an embodiment of an aspect of the present invention.
  • the present invention described in detail below provides methods, compositions and kits useful, e.g., for screening, diagnosis and treatment of Vascular Response in a mammalian subject, and for drug screening and drug development.
  • the body fluid which is analysed for the presence or level of at least one vascular response feature is preferably from a non-human mammal.
  • the non-human mammal is preferably one in which the induction of a vascular response by endogenous and/or exogenous effector agents is predictive of the induction of such a response in humans.
  • the rat is a particularly suitable mammal for use in this aspect of the invention.
  • the invention also encompasses the administration of therapeutic compositions to a mammalian subject to treat or prevent Vascular Response.
  • the mammalian subject may be a non-human mammal, but is preferably human, more preferably a human adult, i.e. a human subject at least 21 (more particularly at least 35, at least 50, at least 60, at least 70, or at least 80) years old.
  • a body fluid e.g.
  • a tissue sample from a subject at risk of having or developing Vascular Response e.g. a biopsy of vascular tissue
  • homogenate thereof from a subject at risk of having or developing Vascular Response.
  • the methods and compositions of the present invention are useful, such as for example, screening, diagnosis and treatment of a living subject, but may also be used for post-mortem diagnosis in a subject, for example, to identify family members of the subject who are at risk of developing the same disease.
  • Vascular Response refers to and includes the alteration in blood and blood vessels and/or any condition, that comes about from the interaction of the blood or blood vessels with endogenous and/or exogenous effector agents.
  • Vascular Response includes but is not limited to aneurysm, artherosclerosis, congestion, edema, hemorrhage, shock, stenosis, stroke, varicose veins and vasculitis (angiitis).
  • Endogenous effector agents include but are not limited to infarct, ischemia, thrombus, diabetes, hypercholesterolemia, hypertension, physical inactivity, poor nutrition, overweightness/obesity and genetic disease (e.g. carotid artery disease, Cushing's disease, lymphedema, thoracic outlet syndrome, vasculititdes (e.g., Wegeners disease).
  • Exogenous effector agents include but are not limited to xenobiotics (e.g.
  • SKF-95654 as particularly utilized herein
  • viruses e.g., nicotine & smoking, chemotherapeutics (e.g., a variety of approved and experimental treatments for indications such as cancer), coagulants and anticoagulants, vasoconstrictors and vasodilators, drugs of abuse (e.g., cocaine, amphetamines), neovascularization effector molecules (e.g., metaloprotease inhibitors, proteoglycans), accidental trauma and surgery (e.g., bypass, angioplasty).
  • chemotherapeutics e.g., a variety of approved and experimental treatments for indications such as cancer
  • coagulants and anticoagulants e.g., vasoconstrictors and vasodilators
  • drugs of abuse e.g., cocaine, amphetamines
  • neovascularization effector molecules e.g., metaloprotease inhibitors, proteoglycans
  • accidental trauma and surgery e.g.
  • Feature refers to a spot detected in a 2D gel
  • Vascular Response - Associated Feature refers to a feature that is differentially present in a sample from a subject having a Vascular Response compared with a sample from a subject free from a Vascular Response.
  • a feature or spot detected in a 2D gel is characterized by its isoelectric point (pi) and molecular weight (MW) as determined by 2D gel electrophoresis, particularly utilizing the Preferred Technology described herein.
  • a feature is “differentially present” in a first sample with respect to a second sample when a method for detecting the said feature (e.g., 2D electrophoresis) gives a different signal when applied to the first and second samples.
  • a VRF (or a protein isofor , i.e. VRPI, as defined infra) is "increased" in the first sample with respect to the second if the method of detection indicates that the VRF, or VRPI is more abundant in the first sample than in the second sample, or if the VRF, or VRPI is detectable in the first sample and substantially undetectable in the second sample.
  • a VRF, or VRPI is "decreased" in the first sample with respect to the second if the method of detection indicates that the VRF, or VRPI is less abundant in the first sample than in the second sample or if the VRF, or VRPI is undetectable in the first sample and detectable in the second sample.
  • the relative abundance of a feature in two samples is determined in reference to its normalized signal, in two steps.
  • the signal obtained upon detecting the feature in a sample is normalized by reference to a suitable background parameter, e.g., (a) to the total protein in the sample being analyzed (e.g., total protein loaded onto a gel); (b) to an Expression Reference Feature (ERF) i.e., a feature whose abundance is substantially invariant, within the limits of variability of the Preferred Technology, in the population of subjects being examined, e.g. the ERFs disclosed below, or (c) more preferably to the total signal detected as the sum of each of all proteins in the sample.
  • a suitable background parameter e.g., (a) to the total protein in the sample being analyzed (e.g., total protein loaded onto a gel); (b) to an Expression Reference Feature (ERF) i.e., a feature whose abundance is substantially invariant, within the limits of variability of the Preferred Technology, in the population
  • the normalized signal for the feature in one sample or sample set is compared with the normalized signal for the same feature in another sample or sample set in order to identify features that are "differentially present" in the first sample (or sample set) with respect to the second.
  • “Fold change” includes “fold increase” and “fold decrease” and refers to the relative increase or decrease in abundance of a VRF or the relative increase or decrease in expression or activity of a polypeptide (e.g. a VRPI, as defined infra.) in a first sample or sample set compared to a second sample (or sample set).
  • a VRF or polypeptide fold change may be measured by any technique known to those of skill in the art, albeit the observed increase or decrease will vary depending upon the technique used. Preferably, fold change is determined herein as described in the Examples infra.
  • Vascular Response- Associated Protein Isoform refers to a protein that is differentially present in a sample from a subject having a Vascular Response compared with a sample from a subject free from any Vascular Response or that is differentially present in a sample from a subject having one or more particular Vascular Response compared with a sample from a subject free from such one or more particular Vascular
  • a VRPI is "differentially present" in a first sample with respect to a second sample when a method for detecting the said feature, (e.g., 2D electrophoresis or immunoassay) gives a different signal when applied to the first and second samples (refer to VRF definition).
  • a method for detecting the said feature e.g., 2D electrophoresis or immunoassay
  • a VRPI is characterized by one or more peptide sequences of which it is comprised, and further by a pl and MW, preferably determined by 2D gel electrophoresis, particularly utilizing the Preferred Technology as described herein.
  • VRPIs are identified or characterized by the amino acid sequencing of VRFs ( Figure 1).
  • FIG. 1 is a flow chart depicting the characterisation of a VRF and relationship of a VRF and VRPI.
  • a VRF may be further characterised as or by a VRPI having a particular peptide sequence associated with its pl and MW.
  • a VRF may comprise one or more VRPIs, which have indistinguishable pi and MWs using the Preferred Technology, but which comprise distinct peptide sequences.
  • the peptide sequence(s) of the VRPI can be utilized to search database(s) for previously-identified proteins comprising such peptide sequence(s). In some instances, it can be ascertained whether a commercially-available antibody exists which may recognize the previously identified protein and/or a variant thereof.
  • the VRPI may correspond to the previously-identified protein, be a variant of the previously identified protein, or be a previously unknown protein.
  • Variant refers to a polypeptide which is a member of a family of polypeptides that are encoded by a single gene or from a gene sequence within a family of related genes and which differ in their pl or MW, or both. Such variants can differ in their amino acid composition (e.g. as a result of alternative mRNA or premRNA processing, e.g. alternative splicing or limited proteolysis) and in addition, or in the alternative, may arise from differential post-translational modification (e.g., glycosylation, acylation, phosphorylation).
  • differential post-translational modification e.g., glycosylation, acylation, phosphorylation
  • Modulate in reference to expression or activity of a VRF, VRPI or a VRPI-related polypeptide refers to any change, e.g., upregulation or downregulation, of the expression or activity of the VRF, VRPI or a VRPI-related polypeptide.
  • Those skilled in the art based on the present disclosure, will understand that such modulation can be dete ⁇ nined by assays known to those of skill in the art.
  • VRPI analog refers to a polypeptide that possesses similar or identical function(s) as a VRPI but need not necessarily comprise an amino acid sequence that is similar or identical to the amino acid sequence of the VRPI, or possess a structure that is similar or identical to that of the VRPI.
  • an amino acid sequence of a polypeptide is "similar" to that of a VRPI if it satisfies at least one of the following criteria: (a) the polypeptide has an amino acid sequence that is at least 30% (more preferably, at least 35%, at least 40%, at least 45%, at least 50%, at least 55%, at least 60%, at least 65%, at least 70%, at least 75%, at least 80%, at least 85%, at least 90%, at least 95% or at least 99%) identical to the amino acid sequence of the VRPI; (b) the polypeptide is encoded by a nucleotide sequence that hybridizes under stringent conditions to a nucleotide sequence encoding at least 5 amino acid residues (more preferably, at least 10 amino acid residues, at least 15 amino acid residues, at least 20 amino acid residues, at least 25 amino acid residues, at least 40 amino acid residues, at least 50 amino acid residues, at least 60 amino residues, at least 70 amino acid residues,
  • a polypeptide with "similar structure" to that of a VRPI refers to a polypeptide that has a similar secondary, tertiary or quarternary structure as that of the VRPI.
  • the structure of a polypeptide can determined by methods known to those skilled in the art, including but not limited to, X-ray crystallography, nuclear magnetic resonance, and crystallographic electron microscopy.
  • VRPI fusion protein refers to a polypeptide that comprises (i) an amino acid sequence of a VRPI, a VRPI fragment, a VRPI-related polypeptide or a fragment of a VRPI-related polypeptide and (ii) an amino acid sequence of a heterologous polypeptide (i.e., a non- VRPI, non- VRPI fragment or non- VRPI-related polypeptide).
  • VRPI homolog refers to a polypeptide that comprises an amino acid sequence similar to that of a VRPI but does not necessarily possess a similar or identical function as the VRPI.
  • VRPI ortholog refers to a non-rat polypeptide that (i) comprises an amino acid sequence similar to that of a VRPI and (ii) possesses a similar or identical function to that of the VRPI. It will be appreciated that the specific VRPIs identified in the description were derived from the rat. The skilled person will recognise that in various aspects of the invention it will be necessary to substitute the rat VRPI for the VRPI ortholog from another mammal e.g. a human. VRPI orthologs can be identified using techniques well known to those skilled in the art for example using homology searching e.g. as described below in relation to the determination of per cent identity of two amino acid sequences.
  • VRPI-related polypeptide refers to a VRPI homolog, a VRPI analog, a variant of
  • VRPI a VRPI ortholog, or any combination thereof.
  • Chimeric Antibody refers to a molecule in which different portions are derived from different animal species, such as those having a human immunoglobulin constant region and a variable region derived from a murine mAb. (See, e.g., Cabilly et al.,
  • “Derivative” refers to a polypeptide that comprises an amino acid sequence of a second polypeptide that has been altered by the introduction of amino acid residue substitutions, deletions or additions.
  • the derivative polypeptide possesses a similar or identical function as the second polypeptide.
  • “Fragment” refers to a peptide or polypeptide comprising an amino acid sequence of at least 5 amino acid residues (preferably, at least 10 amino acid residues, at least 15 amino acid residues, at least 20 amino acid residues, at least 25 amino acid residues, at least 40 amino acid residues, at least 50 amino acid residues, at least 60 amino residues, at least 70 amino acid residues, at least 80 amino acid residues, at least 90 amino acid residues, at least 100 amino acid residues, at least 125 amino acid residues, at least 150 amino acid residues, at least 175 amino acid residues, at least 200 amino acid residues, or at least 250 amino acid residues) of the amino acid sequence of a second polypeptide.
  • the fragment of a VRPI may or may not possess a functional activity of the second polypeptide.
  • the "percent identity" of two amino acid sequences or of two nucleic acid sequences can be or is generally determined by aligning the sequences for optimal comparison purposes (e.g., gaps can be introduced in either sequences for best alignment with the other sequence) and comparing the amino acid residues or nucleotides at corresponding positions.
  • the "best alignment” is an alignment of two sequences that results in the highest percent identity.
  • the determination of percent identity between two sequences can be accomplished using a mathematical algorithm known to those of skill in the art.
  • An example of a mathematical algorithm for comparing two sequences is the algorithm of Karlin and Altschul (1990) Proc. Natl. Acad. Sci. USA 87:2264-2268, modified as in Karlin and Altschul (1993) Proc. Natl. Acad. Sci. USA 90:5873-5877.
  • the NBLAST and XBLAST programs of Altschul, et al. (1990) J. Mol. Biol. 215:403-410 have incorporated such an algorithm.
  • Gapped BLAST can be utilized as described in Altschul et al. (1997) Nucleic Acids Res. 25 :3389-3402.
  • PSI-Blast can be used to perform an iterated search which detects distant relationships between molecules (Id.).
  • ktup is a control option that sets the sensitivity and speed of the search.
  • Diagnosis refers to diagnosis, prognosis, monitoring, characterizing, selecting patients, including participants in clinical trials, and identifying patients at risk for or having a particular disorder or those most likely to respond to a particular therapeutic treatment, or for assessing or monitoring a patient's response to a particular therapeutic treatment.
  • Treatment refers to therapy, prevention and prophylaxis and particularly refers to the administration of medicine or the performance of medical procedures with respect to a patient, for either prophylaxis (prevention) or to cure the infirmity or malady in the instance where the patient is afflicted.
  • Agent refers to all materials that may be used to prepare pharmaceutical and diagnostic compositions, or that may be compounds, nucleic acids, polypeptides, fragments, isoforms, variants, or other materials that may be used independently for such purposes, all in accordance with the present invention.
  • Blood refers to serum and plasma.
  • serum refers to the supernatant fluid produced by clotting and centrifugal sedimentation of a blood sample
  • plasma refers to the supernatant fluid produced by inhibition of clotting (for example, by citrate or EDTA) and centrifugal sedimentation of a blood sample.
  • vascular tissue refers to the cell layers that line veins, arteries and capillaries.
  • VRFs Vascular Response- Associated Features
  • two-dimensional electrophoresis is used to analyze plasma from a subject, preferably a living subject, in order to detect or quantify the expression of one or more Vascular Response- Associated Features (VRFs) for screening, treatment or diagnosis of Vascular Response, to determine the prognosis of a subject having vascular response, to monitor progression of vascular response, to monitor the effectiveness of vascular response therapy, for identifying patients most likely to respond to a particular therapeutic treatment, or for drug development, and ,in particular, to determine the potential for drug candidates to induce a vascular response.
  • VRFs Vascular Response- Associated Features
  • a number of samples from subjects having a Vascular Response and samples from subjects free from a Vascular Response are separated by two-dimensional electrophoresis, and the fluorescent digital images of the resulting gels are matched to a chosen representative primary master gel image.
  • This process allows any gel feature, characterised by its pi and MW, to be identified and examined on any gel of the study.
  • the amount of protein present in a given feature can be measured in each gel; this feature abundance can be averaged amongst gels from similar samples (e.g. gels from samples from subjects having a Vascular Response).
  • statistical analyses can be conducted on the thus created sample sets, in order to compare 2 or more sample sets to each other.
  • two-dimensional electrophoresis (2D-electro ⁇ horesis) means a technique comprising isoelectric focusing, followed by denaturing electrophoresis; this generates a two-dimensional gel (2D-gel) containing a plurality of separated proteins.
  • the step of denaturing electrophoresis uses polyacrylamide electrophoresis in the presence of sodium dodecyl sulfate (SDS-PAGE).
  • SDS-PAGE sodium dodecyl sulfate
  • the highly accurate and automatable methods and apparatus described in International Application No. 97GB3307 (published as WO 98/23950) and in U.S.
  • Patent No 6,064,754 both filed December 1, 1997, each of which is incorporated herein by reference in its entirety with particular reference to the experimental protocol.
  • biomolecules e.g. proteins, including glycoproteins
  • a two-dimensional array is generated by separating biomolecules on a two-dimensional gel according to their electrophoretic mobility and isoelectric point.
  • a computer-generated digital profile of the array is generated, representing the identity, apparent molecular weight, isoelectric point, and relative abundance of a plurality of biomolecules detected in the two-dimensional array, thereby permitting computer-mediated comparison of profiles from multiple biological samples, as well as computer aided excision of separated proteins of interest.
  • the Basiji thesis provides a phase-sensitive detection system for discriminating modulated fluorescence from baseline noise due to laser'scatter or homogeneous fluorescence, but the scanner can also be operated in a non-phase-sensitive mode.
  • This phase-sensitive detection capability would increase the sensitivity of the instrument by an order of magnitude or more compared to conventional fluorescence imaging systems. The increased sensitivity would reduce the sample-preparation load on the upstream instruments while the enhanced image quality simplifies image analysis downstream in the process.
  • a more highly preferred scanner is the Apollo 2 scanner (Oxford Glycosciences, Oxford, UK), which is a modified version of the above described scanner.
  • the gel is transported through the scanner on a precision lead-screw drive system. This is preferable to laying the glass plate on the belt-driven system that is described in the Basiji thesis, as it provides a reproducible means of accurately transporting the gel past the imaging optics.
  • the gel is secured against three alignment stops that rigidly hold the glass plate in a known position. By doing this in conjunction with the above precision transport system, the absolute position of the gel can be predicted and recorded. This ensures that co-ordinates of each feature on the gel can be determined more accurately and communicated, if desired, to a cutting robot for excision of the feature.
  • the carrier that holds the gel has four integral fluorescent markers for use to correct the image geometry. These markers are a quality control feature that confirms that the scanning has been performed correctly.
  • the optical components of the Apollo 2 scanner have been inverted.
  • the laser, mirror, waveguide and other optical components are above the glass plate being scanned.
  • the scanner described in the Basiji thesis has these components underneath.
  • the glass plate is mounted onto the scanner gel side down, so that the optical path remains through the glass plate. By doing this, any particles of gel that may break away from the glass plate will fall onto the base of the instrument rather than into the optics. This does not affect the functionality of the system, but increases its reliability.
  • the Apollo 3 scanner in which the signal output is digitized to the full 16-bit data without any peak saturation or without square root encoding of the signal.
  • a compensation algorithm has also been applied to correct for any variation in detection sensitivity along the path of the scanning beam. This variation is due to anomalies in the optics and differences in collection efficiency across the waveguide.
  • a calibration is performed using a perspex plate with an even fluorescence throughout. The data received from a scan of this plate are used to determine the multiplication factors needed to increase the signal from each pixel level to a target level. These factors are then used in subsequent scans of gels to remove any internal optical variations.
  • VRF Vascular Response-Associated Feature
  • the VRFs disclosed herein have been identified by comparing blood samples from subjects having vascular response against blood samples from subjects free from vascular response Vascular response was induced by xenobiotic treatment as described in the Examples infra, and samples were analyzed 1 hour, 2 hours, 4 hours and 24 hours following treatment.
  • the first group consists of VRFs that are decreased in the blood of subjects having vascular response as compared with the blood of subjects free from vascular response. These VRFs can be described by apparent molecular weight (MW) and isoelectric point (pl) as provided in Table I.
  • MW apparent molecular weight
  • pl isoelectric point
  • the second group consists of VRFs that are increased in the blood of subjects having vascular response as compared with the blood of subjects free from vascular response.
  • VRFs can be described by MW and pi as follows:
  • VRFs Increased in Blood of Subjects Having Vascular Response
  • the signal obtained upon analyzing blood from subjects having vascular response relative to the signal obtained upon analyzing blood from subjects free from vascular response will depend upon the particular analytical protocol and detection technique that is used. Accordingly, the present invention contemplates that each laboratory will, based on the present description, establish a reference range for each VRF in subjects free from vascular response according to the analytical protocol and detection technique in use, as is conventional in the diagnostic art.
  • at least one control positive blood sample from a subject known to have vascular response or at least one control negative blood sample from a subject known to be free from vascular response (and more preferably both positive and negative control samples) are included in each batch of test samples analyzed.
  • the level of expression of a feature is determined relative to a background value, which is defined as the level of signal obtained from a proximal region of the image that (a) is equivalent in area to the particular feature in question; and (b) contains no discemable protein feature.
  • the signal associated with a VRF in the blood of a subject is normalized with reference to one or more ERFs detected in the same 2D gel.
  • ERFs may readily be determined by comparing different samples using the Preferred Technology. Suitable ERFs include (but are not limited to) that described in the following table.
  • the measured MW and pi of a given feature or protein isoform will vary to some extent depending on the precise protocol used for each step of the 2D electrophoresis and for landmark matching.
  • the terms "MW” and "pi" are defined, respectively, to mean the apparent molecular weight and the apparent isoelectric point of a feature or protein isoform as measured in exact accordance with the Reference Protocol identified in Section 6 below.
  • variation in the measured mean pi of a VRF or VRPI is typically less than 3% and variation in the measured mean MW of a VRF or VRPI is typically less than 5%.
  • VRFs can be used for detection, prognosis, diagnosis, or monitoring of vascular response, or for identifying patients most likely to respond to a specific therapeutic treatment, or for drug development.
  • blood from a subject e.g. , a subject treated with a drug candidate, or suspected of having vascular response
  • 2D electrophoresis for quantitative detection of one or more of the following VRFs: VRF-1, VRF-2, VRF-3, VRF-4, VRF-5, VRF-6, VRF-7, VRF-
  • blood from a subject is analyzed by 2D electrophoresis for quantitative detection of (a) one or more VRFs or any combination of them, whose decreased abundance indicates the presence of vascular response, i.e.; VRF-1, VRF-2, VRF-3, VRF-4, VRF-5, VRF-6, VRF-7, VRF-8, VRF-9, VRF-10, VRF-11, VRF-12, VRF-13, VRF-14, VRF-15, VRF-16, VRF-17, VRF-18, VRF-19, VRF-20, VRF-21, NRF-22, NRF-23, NRF-24, NRF-25, VRF-26, VRF-27, VRF-28, VRF-29, VRF-30, VRF-31, VRF-32, VRF-34, VRF-35, VRF-36, VRF-37, VRF-38, VRF-40, VRF-42, VRF-131, VRF-132, VRF-133, VRF-134, VRF-135, VRF-136
  • blood from a subject is analyzed by 2D electrophoresis for quantitative detection of one or more of the following, VRF- 1 ,
  • an increase in one or more VRF/ERF ratios in a test sample relative to the VRF/ERF ratios in a control sample or a reference range indicates the presence of vascular response; VRF-43, VRF-44, VRF-45, VRF-46, VRF-47, VRF-48, VRF-50 VRF-51, VRF-52, VRF-53, VRF-54, VRF-55, VRF-56, VRF-57, VRF-58, VRF-59 VRF-60, VRF-61, VRF-62, VRF-63, VRF-64, VRF-65, VRF-66, VRF-67, VRF-68 VRF-69, VRF-70, VRF-71 , VRF-72, VRF-73, VRF-74, VRF-75, VRF-76, VRF-77 VRF-79, VRF-80, VRF-81, VRF-82, VRF-83, VRF-84, VRF-85, VRF-86
  • blood from a subject is analyzed by 2D electrophoresis for quantitative detection of (a) one or more VRFs, or any combination of them, whose decreased VRF/ERF ratio(s) in a test sample relative to the VRF/ERF ratio(s) in a control sample indicates the presence of vascular response, i.e.; VRF-1, VRF-2, VRF-3, VRF-4, VRF-5, VRF-6, VRF-7, VRF-8, VRF-9, VRF-10, VRF-11, VRF-12, VRF-13, VRF-14, VRF-15, VRF-16, VRF-17, VRF-18, VRF-19, VRF-20, VRF-21, VRF-22, VRF-23, VRF-24, VRF-25, VRF-26, VRF-27, VRF-28, VRF-29, VRF-30, VRF-31, VRF-32, VRF-34, VRF-35, VRF-36, VRF-37, VRF-38, VRF
  • blood from a subject is analyzed for quantitative detection of a plurality of VRFs.
  • VRFs Vascular Response-Associated Protein Isoforms
  • blood from a subject preferably a living subject, is analyzed for quantitative detection of one or more Vascular Response- Associated Protein Isoforms (VRPIs) for screening or diagnosis of vascular response, to determine the prognosis of a subject having vascular response, to monitor the effectiveness of vascular response therapy, for identifying patients most likely to respond to a particular therapeutic treatment or for drug development and ,in particular, to determine the potential for drug candidates to induce a vascular response .
  • VRPIs Vascular Response-Associated Protein Isoforms
  • a given protein may be expressed as one or more variants that differ in their amino acid composition (e.g. as a result of alternative mRNA or premRNA processing, e.g. alternative splicing or limited proteolysis) or as a result of differential post-translational modification (e.g., glycosylation, phosphorylation, acylation), or both, so that proteins of identical amino acid sequence can differ in their pi, MW, or both. It follows that differential presence of a protein variant does not require differential expression of the gene encoding the protein in question.
  • the term "Vascular Response- Associated Protein Isoform” refers to a protein that is differentially present in blood from a subject having vascular response compared with blood from a subject free from vascular response.
  • VRPIs Two groups of VRPIs have been identified by amino acid sequencing of VRFs.
  • VRPIs were isolated, subjected to proteolysis, and analyzed by mass spectrometry using the methods and apparatus of the Preferred Technology.
  • One skilled in the art can identify sequence information from proteins analyzed by mass spectrometry and or tandem mass spectrometry using various spectral interpretation methods and database searching tools. Examples of some of these methods and tools can be found at the Swiss Institute of Bioinformatics web site at http://www.expasy.com/ and the European Molecular Biology Laboratory web site at www.mann.embl-heidelberg.de/Services/PeptideSearch . Identification of VRPIs was performed primarily using the SEQUEST search program (Eng et al., 1994, J. Am.
  • the first group consists of VRPIs that are decreased in the blood of subjects having vascular response as compared with the blood of subjects free from vascular response, where the differential presence is significant.
  • the amino acid sequences of tryptic digest peptides of these VRPIs identified by tandem mass spectrometry and database seai'ching as described in the Examples, infra are listed in Table IV in addition to the pis and MWs of these VRPIs.
  • the second group comprises VRPIs that are increased in the blood of subjects having vascular response as compared with the blood of subjects free from vascular response, where the differential presence is significant.
  • the amino acid sequences of tryptic digest peptides of these VRPIs identified by tandem mass spectrometry and database searching are listed in Table V in addition to the pis and MWs of these VRPIs.
  • the VRPI is a protein comprising a peptide sequence described for that VRPI (preferably comprising a plurality of, more preferably all of, the peptide sequences described for that VRPI) and has a pi of about the value stated for that VRPI (preferably within 10%, more preferably within 5% still more preferably within 1% of the stated value) and has a MW of about the value stated for that VRPI (preferably within 10%, more preferably within 5%, still more preferably within 1% of the stated value).
  • blood from a subject is analyzed for quantitative detection of one or more of the following VRPIs: VRPI-1, VRPI-14, VRPI-18, VRPI-19, VRPI-23, VRPI-28.1, VRPI-28.2, VRPI-32.1, VRPI-32.2, VRPI-36, VRPI-38, VRPI-183, or any combination of them, wherein a decreased abundance of the VRPI or VRPIs (or any combination of them) in the blood from the subject relative to blood from a subject or subjects free from vascular response (e.g., a control sample or a previously determined reference range) indicates the presence of vascular response.
  • vascular response e.g., a control sample or a previously determined reference range
  • blood from a subject is analyzed for quantitative detection of one or more of the following VRPIs: VRPI-43, VRPI-47.1,
  • vascular response e.g., a control sample or a previously determined reference range
  • blood from a subjecfis ⁇ analyzed for quantitative detection of (a) one or more VRPIs, or any combination of them, whose decreased abundance indicates the presence of vascular response, i.e. VRPI-1, VRPI-14, VRPI-18, VRPI-19, VRPI-23, VRPI-28.1, VRPI-28.2, VRPI-32.1, VRPI-32.2, VRPI-36, VRPI-38, VRPI- 183, and (b) one or more VRPIs, or any combination of them, whose increased abundance indicates the presence of vascular response, i.e. VRPI-43, VRPI-47.1, VRPI-47.2, VRPI-58, VRPI-61, VRPI-63, VRPI-65, VRPI-68.1, VRPI-68.2, VRPI-
  • blood from a subject is analysed for quantitative detection of one or more VRPIs and one or more previously known biomarkers of vascular response (e.g., apolipoprotein Al).
  • biomarkers of vascular response e.g., apolipoprotein Al
  • the abundance of each VRPI and known biomarker relative to a control or reference range indicates whether a subject has vascular response.
  • the abundance of a VRPI is normalized to an Expression Reference Protein Isoform (ERPI).
  • ERPIs can be identified by partial amino acid sequencing of ERFs, which are described above, using the methods and apparatus of the Preferred Technology.
  • the VRPIs described herein include previously unknown proteins, as well as variants of known proteins where the variants were not previously known to be associated with vascular response.
  • the present invention additionally provides: (a) a preparation comprising the isolated VRPI; (b) a preparation comprising one or more fragments of the VRPI; and (c) antibodies that bind to said VRPI, to said fragments, or both to said VRPI and to said fragments.
  • a VRPI is "isolated" when it is present in a preparation that is substantially free of contaminating proteins, i.e., a preparation in which less than 10% (preferably less than 5%, more preferably less than 1%) of the total protein present is contaminating protein(s).
  • a contaminating protem is a protein or pro cein is ⁇ formrhaving a "significantly different pi - or MW from those of the isolated VRPI, as determined by 2D electrophoresis.
  • a "significantly different" pi or MW is one that permits the contaminating protein to be resolved from the VRPI on 2D electrophoresis, performed according to the Reference Protocol.
  • an isolated protein comprising a peptide with the amino acid sequence identified in Table IV or V for a VRPI, said protein having a pi and MW within 10% (preferably within 5%, more preferably within 1%) of the values identified in Table TV or V for that VRPI.
  • the VRPIs of the invention can be qualitatively or quantitatively detected by any method known to those skilled in the art, including but not limited to the Preferred Technology described herein, kinase assays, enzyme assays, binding assays and other functional assays, immunoassays, and western blotting.
  • the VRPIs are separated on a 2-D gel by virtue of their MWs and pis and visualized by staining the gel.
  • the VRPIs are stained with a fluorescent dye and imaged with a fluorescence scanner. Sypro Red (Molecular Probes, Inc., Eugene, Oregon) is a suitable dye for this purpose.
  • a preferred fluorescent dye is Pyridinium, 4-[2-[4-(dipentylamino)-2-trifluoromethylphenyl] ethenyl]-l-(sulfobutyl)-, inner salt. See U.S. Application No. 09/412,168, filed on October 5, 1999, which is incorporated herein by reference in its entirety.
  • VRPIs can be detected in an immunoassay.
  • an immunoassay is performed by contacting a sample from a subject to be tested with an anti-VRPI antibody under conditions such that immunospecific binding can occur if the VRPI is present, and detecting or measuring the amount of any immunospecific binding by the antibody.
  • the anti-VRPI antibody preferentially binds to the VRPI rather than to other isoforms of the same protein.
  • Anti-VRPI antibodies can be produced by the methods and techniques described herein; examples of such antibodies known in the art have been reported to recognize a protein having an amino acid sequencexorresponding to a sequence of a VRPI", or whicbrhave been-reported-to recognize a protein named in the database selected by searching with the VRPI sequence, are set forth in Table VI. These antibodies shown in Table VI are already reported to bind to the protein of which the VRPI is itself predicted to be a family member.
  • the anti-VRPI antibody binds to the VRPI with at least 2- fold greater affinity, more preferably at least 5-fold greater affinity, still more preferably at least 10-fold greater affinity, than to said other isoforms of the same protein.
  • the skilled artisan can readily assess and determine the ability of the noted antibody to recognize or bind to the VRPI and the specificity of such binding or recognition.
  • the antibodies in Table VI do not display the required preferential selectivity for the target VRPI, one skilled in the art can generate additional antibodies by using the VRPI itself for the generation of such antibodies.
  • VRPIs can be transferred from the gel to a suitable membrane (e.g. a PVDF membrane) and subsequently probed in suitable assays that include, without limitation, competitive and non-competitive assay systems using techniques such as western blots and "sandwich" immunoassays using anti-VRPI antibodies as described herein e.g. the
  • the immunoblots can be used to identify those anti-VRPI antibodies displaying the selectivity required to immuno-specifically differentiate a VRPI from other isoforms encoded by the same gene. For example one skilled in the art can identify anti-VRPI antibodies in catalogues of commercially available antibodies.
  • Some examples of companies that supply antibodies include ACCURATE CHEMICAL & SCIENTIFIC CORPORATION http://www.accuratechemical.com; RDI RESEARCH DIAGNOSTICS, INC - http://www.researchd.eom/l: BIODESIGN INTERNATIONAL - http://www.biodesign.com/; Chemicon International - www.chemicon.com; DAKO CORPORATION www.dako.com.
  • binding of antibody in tissue sections can be used to detect aberrant VRPI localization or an aberrant level of one or more VRPIs.
  • antibody to a VRPI can be used to assay a tissue sample (e.g., a vascular biopsy) from a subject for the level of the VRPI where an aberrant level of VRPI is
  • an "aberrant level” means a level that is increased or decreased compared with the level in a subject free from vascular response or a reference level. If desired, the comparison can be performed with a matched sample from the same subject, taken from a portion of the body not affected by vascular response.
  • any suitable immunoassay can be used, including, without limitation, competitive and non-competitive assay systems using techniques such as western blots, radioimmunoassays, ELISA (enzyme linked immunosorbent assay), "sandwich” immunoassays, immunoprecipitation assays, precipitin reactions, gel diffusion
  • a VRPI can be detected in a fluid sample (e.g., spinal fluid, blood or -30" plasma) by-means ofra-two-step sandwich-assay; -In the-first-step, a capture reagent- - (e.g., an anti-VRPI antibody) is used to capture the VRPI. Examples of such antibodies known in the art can be identified as described infra.
  • the capture reagent can optionally be immobilized on a solid phase.
  • a directly or indirectly labeled detection reagent is used to detect the captured VRPI.
  • the detection reagent is a lectin.
  • any lectin can be used for this purpose that preferentially binds to the VRPI rather than to other isoforms that have the same core protein as the VRPI or to other proteins that share the antigenic determinant recognized by the antibody.
  • the chosen lectin binds to the VRPI with at least 2-fold greater affinity, more preferably at least 5 -fold greater affinity, still more preferably at least 10-fold greater affinity, than to said other isoforms that have the same core protein as the VRPI or to said other proteins that share the antigenic determinant recognized by the antibody.
  • a lectin that is suitable for detecting a given VRPI can readily be identified by methods well known in the art, for instance upon testing one or more lectins enumerated in Table I on pages 158-159 of Sumar et al., Lectins as Indicators of Disease-Associated Glycoforms, In: Gabius H-J & Gabius S (eds.), 1993, Lectins and Glycobiology, at pp. 158-174 (which is incorporated herein by reference in its entirety).
  • Lectins with the desired oligosaccharide specificity can be identified, for example, by their ability to detect the VRPI in a 2D gel, in a replica of a 2D gel following transfer to a suitable solid substrate such as a nitrocellulose membrane, or in a two-step assay following capture by an antibody.
  • the detection reagent is an antibody, e.g., an antibody that immunospecifically detects other post-translational modifications, such as an antibody that immunospecifically binds to phosphorylated amino acids.
  • antibodies examples include those that bind to phosphotyrosine (BD Transduction Laboratories, catalog nos.: Pl 1230- 050/Pl 1230-150; Pl 1120; P38820; P39020), those that bind to phosphoserine (Zymed
  • a ⁇ gene " en ⁇ oding-a VRPl7a-related-gene7or-related-nucleic-acid-sequenees- ⁇ r- subsequences, including complementary sequences, can also be used in hybridization assays.
  • a nucleotide encoding a VRPI, or subsequences thereof comprising at least 8 nucleotides, preferably at least 12 nucleotides, and most preferably at least 15 nucleotides can be used as a hybridization probe.
  • Hybridization assays can be used for detection, prognosis, diagnosis, or monitoring of conditions, disorders, or disease states, associated with aberrant expression of genes encoding VRPIs, or for differential diagnosis of subjects with signs or symptoms suggestive of vascular response.
  • a hybridization assay can be carried out by a method comprising contacting a subject's sample containing nucleic acid with a nucleic acid probe capable of hybridizing to a DNA or RNA that encodes a VRPI, under conditions such that hybridization can occur, and detecting or measuring any resulting hybridization.
  • Nucleotides can be used for therapy of subjects having vascular response, as described below.
  • kits comprising an anti-VRPI antibody.
  • a kit may optionally comprise one or more of the following: (1) instructions for using the anti-VRPI antibody for diagnosis, prognosis, therapeutic monitoring or any combination of these applications; (2) a labeled binding partner to the antibody; (3) a solid phase (such as a reagent strip) upon which the anti-VRPI antibody is immobilized; and (4) a label or insert indicating regulatory approval for diagnostic, prognostic or therapeutic use or any combination thereof.
  • the anti-VRPI antibody itself can be labeled with a detectable marker, e.g., a chemiluminescent, enzymatic, fluorescent, or radioactive moiety.
  • kits comprising a nucleic acid probe capable of hybridizing to RNA encoding a VRPI.
  • a kit comprises in one or more containers a pair of primers (e.g., each in the size range of 6-30 nucleotides, more preferably 10-30 nucleotides and still more preferably 10-20 nucleotides) that under appropriate reaction conditions can prime amplification of at least a " portion " of a ' nucleicacid encoding a ' VRPI; suerras"by-polymerase chain- reaction (see, e.g., Innis et al., 1990, PCR Protocols, Academic Press, Inc., San Diego, CA), ligase chain reaction (see EP 320,308) use of Q ⁇ replicase, cyclic probe reaction, or other methods known in the art.
  • primers e.g., each in the size range of 6-30 nucleotides, more preferably 10-30 nucleotides and still more preferably 10-20 nucleotides
  • Kits are also provided which allow for the detection of a plurality of VRPIs or a plurality of nucleic acids each encoding a VRPI.
  • a kit can optionally further comprise a predetermined amount of an isolated VRPI protein or a nucleic acid encoding a VRPI, e.g., for use as a standard or control.
  • the uni-variate differential analysis tools are useful in identifying individual VRFs or VRPIs that are diagnostically associated with vascular response or in identifying individual VRPIs that regulate the disease process.
  • the disease process is associated with a combination of VRFs or VRPIs (and to be regulated by a combination of VRPIs), rather than individual VRFs and VRPIs in isolation.
  • the strategies for discovering such combinations of VRFs and VRPIs differ from those for discovering individual VRFs and VRPIs. In such cases, each individual VRF and VRPI can be regarded as one variable and the disease can be regarded as a joint, multi-variate effect caused by interaction of these variables.
  • the first step is to identify a collection of VRFs or VRPIs that individually show significant association with vascular response.
  • the association between the identified VRFs or VRPIs and vascular response need not be as highly significant as is desirable when an individual VRF or VRPI is used as a diagnostic. Any of the tests discussed ab ⁇ ve _ (fdrd ;hanges7wilco o ' n " ra-& etc.)-can " be-used-a this-stager.
  • LDA Linear Discriminant Analysis
  • VRFs or VRPIs variables
  • vascular response a cluster of variables (i.e., VRFs or VRPIs) and vascular response.
  • a set of weights is associated with each variable (i.e., VRF or VRPI) so that the linear combination of weights and the measured values of the variables can identify the disease state by discriminating between subjects having vascular response and subjects free from vascular response.
  • Enhancements to the LDA allow stepwise inclusion (or removal) of variables to optimize the discriminant power of the model.
  • the result of the LDA is therefore a cluster of VRFs or VRPIs which can be used, without limitation, for diagnosis, prognosis, therapy or drug development.
  • LDA Flexible Discriminant Analysis
  • Other enhanced variations of LDA permit the use of non-linear combinations of variables to discriminate a disease state from a normal state.
  • the results of the discriminant analysis can be verified by post-hoc tests and also by repeating the analysis using alternative techniques such as classification trees.
  • a further category of VRFs or VRPIs can be identified by qualitative measures by comparing the percentage feature presence of a VRF or VRPI of one group of samples (e.g., samples from diseased subjects) with the percentage feature presence of a VRF or VRPI in another group of samples (e.g., samples from control subjects).
  • the "percentage feature presence" of a VRF or VRPI is the percentage of samples in a group of samples in which the VRF or VRPI is detectable by the detection method of choice. For example, if a VRF is detectable in 95 percent of samples from diseased subjects, the percentage feature presence of that VRF in that sample group is 95 percent. If only 5 percent of samples from non-diseased subjects have detectable levels of the same VRF, detection of that VRF in the sample of a subject would suggest that it is likely that the subject suffers from vascular response.
  • the diagnostic methods and compositions of the present invention can assist in monitoring a clinical study, e.g. to evaluate drugs for therapy of vascular response.
  • candidate molecules are tested for their ability to restore VRF or VRPI levels in a subject having vascular response to levels found in subjects free from vascular response or, in a treated subject (e.g. after treatment with a vasotoxic agent), to preserve VRF or VRPI levels at or near non- vascular response values.
  • the levels of one or more VRFs or VRPIs can be assayed.
  • the methods and compositions of the present invention are used to screen candidates for a clinical study to identify individuals having vascular response; such individuals can then be either excluded from or included in the study or can be placed in a separate cohort for treatment or analysis. If desired, the candidates can concurrently be screened to identify individuals with other measures of vascular response (e.g. angiography); procedures for these screens are well known in the art.
  • the invention provides isolated mammalian VRPIs, preferably rat VRPIs, and fragments thereof which comprise an antigenic determinant (i.e., can be recognized by an antibody) or which are otherwise functionally active, as well as nucleic acid sequences encoding the foregoing.
  • "Functionally active” as used herein refers to material displaying one or more functional activities associated with a full- length (wild-type) VRPI, e.g., binding to a VRPI substrate or VRPI binding partner, antigenicity (binding to an anti-VRPI antibody), immunogenicity, enzymatic activity and the like.
  • the invention provides fragments of a VRPI comprising at least 5 amino acids, at least 10 amino acids, at least 50 amino acids, or at least 75 amino acids. Fragments lacking some or all of the regions of a VRPI are also provided ⁇ as are proteins (e.g., fusion proteins) comprising such fragments. Nucleic- acids encoding the foregoing are provided. Once a recombinant nucleic acid which encodes the VRPI, a portion of the VRPI, or a precursor of the VRPI is identified, the gene product can be analyzed. This is achieved by assays based on the physical or functional properties of the product, including radioactive labeling of the product followed by analysis by gel electrophoresis, immunoassay, etc.
  • the VRPIs identified herein can be isolated and purified by standard methods including chr ⁇ matography (e.g., ion exchange, affinity, and sizing column chromatography), centrifugation, differential solubility, or by any other standard technique for the purification of proteins.
  • chr ⁇ matography e.g., ion exchange, affinity, and sizing column chromatography
  • centrifugation e.g., centrifugation, differential solubility, or by any other standard technique for the purification of proteins.
  • the entire amino acid sequence of the VRPI can be deduced from the nucleotide sequence of the gene coding region contained in the recombinant nucleic acid.
  • the protein can be synthesized by standard chemical methods known in the art (e.g., see Hunkapiller et al, 1984, Nature 310:105-111).
  • native VRPIs can be purified from natural sources, by standard methods such as those described above (e.g., immunoaffinity purification).
  • VRPIs are isolated by the Preferred Technology described supra.
  • a narrow-range "zoom gel” having a pH range of 2 pH units or less is preferred for the isoelectric step, according to the method described in Westermeier, 1993, Electrophoresis in Practice (VCH, Weinheim, Germany), pp.
  • the invention thus provides an isolated VRPI, an isolated VRPI-related polypeptide, and an isolated derivative or fragment of a VRPI or a VRPI-related polypeptide; any of the foregoing can be produced by recombinant DNA techniques or by chemical synthetic methods.
  • nucleotide sequences of the present invention including DNA and RNA, and comprising a sequence encoding a VRPI or a fragment thereof, or a VRPI-related polypeptide, may be synthesized using methods known in the art, such as using conventional chemical approaches or polymerase chain reaction (PCR) amplification.
  • the nucleotide sequences of the present invention also permit the identification and cloning of the gene encoding a VRPI homolog or VRPI ortholog including, for example, by screening cDNA libraries, genomic libraries or expression libraries.
  • oligonucleotides can be designed for all VRPI peptide fragments identified as part of the same protein.
  • PCR reactions under a variety of conditions can be performed with relevant cDNA and genomic DNAs (e.g., from vascular tissue or from cells of the immune system) from one or more species.
  • vectorette reactions can be performed on any available cDNA and genomic DNA using the oligonucleotides (which preferably are nested) as above.
  • Vectorette PCR is a method that enables the amplification of specific DNA fragments in situations where the sequence of only one primer is known.
  • Vectorette PCR may pe performed with probes that are, for example, anchored degenerate oligonucleotides (or most likely oligonucleotides) coding for NRPI peptide fragments, using as a template a genomic library or cD ⁇ A library pools.
  • Anchored degenerate oligonucleotides can be designed for all VRPI peptide fragments. These oligonucleotides may be labelled and hybridized to filters containing cD ⁇ A and genomic D ⁇ A libraries. Oligonucleotides to different peptides from the same protein will often identify the same members of the library.
  • the cD ⁇ A and genomic D ⁇ A libraries may be obtained from any suitable or desired mammalian species, for example from humans.
  • Nucleotide sequences comprising a nucleotide sequence encoding a VRPI or VRPI fragment of the present invention are useful for their ability to hybridize selectively with complementary stretches of genes encoding other proteins.
  • a variety of hybridization conditions may be employed to obtain nucleotide sequences at least 30%, 35%, 40%, 45%, 50%, 55%, 60%, 65%, 70%, 75%, 80%, 85%, 90%, 95% or 99% identical, or 100% identical, to the sequence of a nucleotide encoding a VRPI.
  • relatively stringent conditions are used to form the duplexes, such as low salt or high temperature conditions.
  • “highly stringent conditions” means hybridization to filter-bound DNA in 0.5 M NaHPO 4 , 7% sodium dodecyl sulfate (SDS), 1 mM EDTA at 65°C, and washing in O.lxSSC/0.1% SDS at 68°C (Ausubel F.M. et al., eds., 1989, Current Protocols in Molecular Biology,
  • hybridization conditions means washing in 0.2xSSC/0.1% SDS at 42°C (Ausubel et al, addition of increasing amounts of formamide, to destabilize the hybrid duplex.
  • particular hybridization conditions can be readily manipulated, and will generally be chosen depending on the desired results.
  • convenient hybridization temperatures in the presence of 50% formamide are: 42°C for a probe which is 95 to 100% identical to the fragment of a gene encoding a VRPI, 37°C for 90 to 95% identity and 32°C for 70 to 90% identity.
  • DNA fragments are generated, some of which will encode parts or the whole of a VRPI.
  • Any suitable method for preparing DNA fragments may be used in the present invention.
  • the DNA may be cleaved at specific sites using various restriction enzymes.
  • the DNA fragments can then be separated according to size by standard techniques, including but not limited to agarose and polyacrylamide gel electrophoresis, column chromatography and sucrose gradient centrifugation.
  • the DNA fragments can then be inserted into suitable vectors, including but not limited to plasmids, cosmids, bacteriophages lambda or T 4 , and yeast artificial chromosome (YAC).
  • suitable vectors including but not limited to plasmids, cosmids, bacteriophages lambda or T 4 , and yeast artificial chromosome (YAC).
  • YAC yeast artificial chromosome
  • the genomic library may be screened by nucleic acid hybridization to labeled probe (Benton and Davis, 1977, Science 196:180; Grunstein and Hogness, 1975, Proc. Natl. Acad. Sci. U.S.A. 72:3961).
  • the genomic libraries may be screened with labeled degenerate oligonucleotide probes corresponding to the amino acid sequence of any peptide of the VRPI using optimal approaches well known in the art.
  • Any probe used is at least 10 nucleotides. at least 15 nucleotides, at least 20 nucleotides, at least 25 nucieotides, atleast 30 " nucle " 5tia , e ⁇ 7afle st " 40 nucle ⁇ tMesTaf least SO nucleotirlesrat" least 60 nucleotides, at least 70 nucleotides, at least 80 nucleotides, or at least 100 nucleotides.
  • a probe is 10 nucleotides or longer, and more preferably 15 nucleotides or longer.
  • any probe may be used that is complementary to the gene or its complement; preferably the probe is 10 nucleotides or longer, more preferably 15 nucleotides or longer.
  • SWISS-PROT and trEMBL databases held by the Swiss Institute of Bioinformatics (SIB) and the European Bioinformatics Institue (EBI) which are available at http://www.expasy.com/) and the GenBank database (held by the National
  • degenerate probes or probes taken from the sequences described above by accession number may be used for screening.
  • they can be constructed from the partial amino sequence information obtained from tandem mass spectra of tryptic digest peptides of the VRPI.
  • any probe may be used that is complementary to the gene or its complement; preferably the probe is 10 nucleotides or longer, more preferably 15 nucleotides or longer.
  • Hybridization of such oligonucleotide probes to genomic libraries is carried out using methods known in the art. For example, hybridization with one of the above-mentioned degenerate sets of oligonucleotide probes, or their complement (or with any member of such a set, or its complement) can be performed under highly stringent or moderately stringent conditions as defined above, or can be carried out in 2X SSC, 1.0% SDS at 50°C and washed using the washing conditions described supra for highly stringent or moderately stringent hybridization.
  • clones containing nucleotide sequences encoding the entire VRPI, a fragment of a VRPI, a VRPI-related polypeptide, or a fragment of a VRPI-related polypeptide any of the foregoing may also be obtained by screening expression libraries.
  • DNA from the relevant source is isolated and random fragments are prepared and ligated into an expression vector (e.g., a bacteriophage, plasmid, phagemid or cosmid) such that the inserted sequence in the vector is capable of being expressed by the host cell into which the vector is then introduced.
  • an expression vector e.g., a bacteriophage, plasmid, phagemid or cosmid
  • Various screening assays can then be used to select for the expressed VRPI or VRPI-related polypeptides.
  • the various anti-VRPI antibodies of the invention can be used to identify the desired clones using methods known in the art. See, for example, Harlow and Lane, 1988, Antibodies: A Laboratorv Manual. Cold Spring Harbor Laboratory Press, Cold Spring Harbor, NY, Appendix
  • colonies or plaques containing D ⁇ A that encodes a VRPI, a fragment of a VRPI, a VRPI-related polypeptide, or a fragment of a VRPI-related polypeptide can be detected using DY ⁇ A Beads according to Olsvick et al., 29th ICAAC, Houston, Tex. 1989, incorporated herein by reference.
  • Anti-VRPI antibodies are crosslinked to tosylated DY ⁇ A Beads M280, and these antibody-containing beads are then contacted with colonies or plaques expressing recombinant polypeptides. Colonies or plaques expressing a VRPI or VRPI-related-polypeptide-are-identified-as- any of those that bind the beads.
  • the anti-VRPI antibodies can be nonspecifically immobilized to a suitable support, such as silica or Celite 7 resin. This material is then used to adsorb to bacterial colonies expressing the VRPI protein or VRPI-related polypeptide as described herein.
  • PCR amplification may be used to isolate from genomic DNA a substantially pure DNA (i.e., a DNA substantially free of contaminating nucleic acids) encoding the entire VRPI or a part thereof.
  • a substantially pure DNA i.e., a DNA substantially free of contaminating nucleic acids
  • a DNA is at least 95% pure, more preferably at least 99% pure.
  • Oligonucleotide sequences, degenerate or otherwise, that correspond to peptide sequences of VRPIs disclosed herein can be used as primers.
  • PCR can be carried out, e.g., by use of a Perkin-Elmer Cetus thermal cycler and Taq polymerase (Gene Amp 7 or AmpliTaq DNA polymerase).
  • a Perkin-Elmer Cetus thermal cycler and Taq polymerase Gene Amp 7 or AmpliTaq DNA polymerase.
  • After successful amplification of a segment of the sequence encoding a VRPI that segment may be molecularly cloned and sequenced, and utilized as a probe to isolate a complete genomic clone. This, in turn, will permit the determination of the gene's complete nucleotide sequence, the analysis of its expression, and the production of
  • the gene encoding a VRPI can also be identified by mRNA selection by nucleic acid hybridization followed by in vitro translation. In this procedure, fragments are used to isolate complementary mRNAs by hybridization. Such DNA fragments may represent available, purified DNA encoding a VRPI of another species (e.g., mouse, human). Immunoprecipitation analysis or functional assays (e.g., aggregation ability in vitro; binding to receptor) of the in vitro franslation products of the isolated products of the isolated mRNAs identifies the mRNA and, therefore, the complementary DNA fragments that contain the desired sequences.
  • specific mRNAs may be selected by adso ⁇ tion of polysomes isolated from cells to immobilized antibodies that specifically recognize a VRPI.
  • a radiolabelled cDNA encoding a VRPI can be synthesized using the selected mRNA (from the adsorbed polysomes) as a template. The radiolabelled mRNA or cDNA may then be used as a probe to identify the DNA fragments encoding a VRPI from among other genomic DNA fragments.
  • RNA for cDNA cloning of the gene encoding a VRPI can be isolated from cells which express the VRPI.
  • Any suitable eukaryotic cell can serve as the nucleic acid source for the molecular cloning of the gene encoding a VRPI.
  • the nucleic acid sequences encoding the VRPI can be isolated from vertebrate, mammalian, primate, human, porcine, bovine, feline, avian, equine, canine or urine sources.
  • the DNA may be obtained by standard procedures known in the art from cloned DNA (e.g., a DNA "library”), by chemical synthesis, by cDNA cloning, or by the cloning of genomic DNA, or fragments thereof, purified from the desired cell.
  • Clones derived from genomic DNA may contain regulatory and intron DNA regions in addition to coding regions; clones derived from cDNA will contain only exon sequences.
  • the identified and isolated gene or cDNA can then be inserted into any suitable cloning vector.
  • vector-host systems known in the art may be used.
  • the vector system chosen be compatible with the host cell used.
  • Such vectors include, but are not limited to, bacteriophages such as lambda derivatives, plasmids such as PBR322 or pUC plasmid derivatives or the Bluescript vector (Stratagene) or modified viruses such as adenoviruses, adeno-associated viruses or retroviruses.
  • the insertion into a cloning vector can be accomplished, for example, by ligating the DNA fragment into a cloning vector which has complementary cohesive termini.
  • the ends of the DNA molecules may be enzymatically modified.
  • any site desired may be produced by ligating nucleotide sequences (linkers) onto the DNA termini; these ligated linkers may comprise specific chemically synthesized oligonucleotides encoding restriction endonuclease recognition sequences.
  • the cleaved vector and the gene encoding a VRPI may be modified by homopolymeric tailing. Recombinant molecules can be introduced into host cells via transformation, fransfection, infection, elecfroporation, etc., so that many copies of the gene sequence are generated.
  • transformation of host cells with recombinant DNA molecules that inco ⁇ orate the isolated gene encoding the VRPI, cDNA, or synthesized DNA sequence enables generation of multiple copies of the gene.
  • the gene may be obtained in large quantities by growing transformants, isolating the recombinant DNA molecules from the transformants and, when necessary, retrieving the inserted gene from the isolated recombinant DNA.
  • nucleotide sequences of the present invention include nucleotide sequences encoding amino acid sequences with substantially the same amino acid sequences as native VRPIs, nucleotide sequences encoding amino acid sequences with functionally equivalent amino acids, nucleotide sequences encoding VRPIs, a fragments of VRPIs, VRPI-related polypeptides, or fragments of VRPI-related polypeptides.
  • an isolated nucleic acid molecule encoding a VRPI-related polypeptide can be created by introducing one or more nucleotide substitutions, additions or deletions into the nucleotide sequence of a VRPI such that one or more amino acid substitutions, additions or deletions are introduced into the encoded protein.
  • Standard techniques known to those of skill in the art can be used to introduce mutations, including, for example, site-directed mutagenesis and PCR-mediated mutagenesis.
  • conservative amino acid substitutions are made at one or more predicted non-essential amino acid residues.
  • a "conservative amino acid substitution" is one in which the amino acid residue is replaced with an amino acid residue having a side chain with a similar charge.
  • Families of amino acid residues having side chains with similar charges have been defined in the art. These families include amino acids with basic side chains (e.g., lysine, arginine, histidine), acidic side chains (e.g., aspartic acid, glutamic acid), uncharged polar side chains (e.g., glycine, asparagine, glutamine, serine, threonine, tyrosine, cysteine), nonpolar side chains (e.g., alanine, valine, leucine, isoleucine, proline, phenylalanine, methionine, tryptophan), beta-branched side chains (e.g., threonine, valine, isoleucine) and aromatic side chains (e.g., tyrosine, phenylalanine, tryptophan, histidine).
  • basic side chains e.g., lysine, arginine, histidine
  • acidic side chains e.
  • mutations can be introduced randomly along all or part of the coding sequence, such as by saturation mutagenesis, and the resultant mutants can be screened for biological activity to identify mutants that retain activity. Following mutagenesis, the encoded protein can be expressed and the activity of the protein can be determined.
  • the nucleotide sequence coding for a VRPI, a VRPI analog, a VRPI-related peptide, or a fragment or other derivative of any of the foregoing can be inserted into an appropriate expression vector, i.e., a vector which contains the necessary elements for the transcription and translation of the inserted protein-coding sequence.
  • the necessary transcriptional and translational signals can also be supplied by the native gene encoding the VRPI or its flanking regions, or the native gene encoding the VRPI- related polypeptide or its flanking regions.
  • a variety of host-vector systems may be utilized in the present invention to express the protein-coding sequence.
  • mammalian cell systems infected with virus e.g., vaccinia virus, adenovirus, etc.
  • insect cell systems infected with virus e.g., baculovirus
  • microorganisms such as yeast containing yeast vectors; or bacteria transformed with bacteriophage, DNA, plasmid DNA, or cosmid DNA.
  • the expression elements of vectors vary in their strengths and specificities. Depending on the host-vector system utilized, any one of a number of suitable transcription and translation elements may be used.
  • a nucleotide sequence encoding a human gene or a nucleotide sequence encoding a functionally active portion of a huma VRPI
  • a fragment of a VRPI comprising a domain of the VRPI is expressed.
  • any of the methods previously described for the insertion of DNA fragments into a vector may be used to construct expression vectors containing a chimeric gene consisting of appropriate transcriptional and translational control signals and the protein coding sequences. These methods may include in vitro recombinant DNA and synthetic techniques and in vivo recombinants (genetic recombination). Expression of nucleic acid sequence encoding a VRPI or fragment thereof may be regulated by a second nucleic acid sequence so that the VRPI or fragment is expressed in a host transformed with the recombinant DNA molecule. For example, expression of a VRPI may be controlled by any promoter or enhancer element known in the art.
  • Promoters which may be used to control the expression of the gene encoding a VRPI or a VRPI- related polypeptide include, but are not limited to, the SV40 early promoter region (Bernoist and Chambon, 1981, Nature 290:304-310), the promoter contained in the 3' long terminal repeat of Rous sarcoma virus (Yamamoto, et al., 1980, Cell 22:787-797), the herpes thymidine kinase promoter (Wagner et al., 1981, Proc. Natl. Acad. Sci. U.S.A.
  • prokaryotic expression vectors such as the _-lactamase promoter (Villa-Kamaroff, et al., 1978, Proc. Natl. Acad. Sci. U.S.A. 75:3727-3731), or the tac promoter (DeBoer, et al, 1983, Proc. Natl. Acad. Sci. U.S.A.
  • promoter elements from yeast or other fungi such as the Gal 4 promoter, the ADC (alcohol dehydrogenase) promoter, PGK (phosphoglycerol kinase) promoter, alkaline phosphatase promoter, and the following animal transcriptional control regions, which exhibit tissue specificity and have been utilized in transgenic animals: elastase I gene control region which is active in pancreatic acinar cells (Swift et al., 1984, Cell 38:639-646; Ornitz et al., 1986, Cold Spring Harbor Symp. Quant. Biol. 50:399-409;
  • mouse mammary tumor virus control region which is active in testicular, breast, lymphoid and mast cells (Leder et al., 1986, Cell 45:485-495), albumin gene control region which is active in liver (Pinkert et al., 1987, Genes and Devel. 1 :268-276), alpha-fetoprotein gene control region which is active in liver (Krumlauf et al., 1985, Mol. Cell. Biol. 5:1639-1648; Hammer et al., 1987, Science 235:53-58; alpha 1-antitrypsin gene control region which is active in the liver (Kelsey et al., 1987, Genes and Devel.
  • beta-globin gene control region which is active in myeloid cells (Mogram et al., 1985, Nature 315:338-340; Kollias et al., 1986, Cell 46:89-94; myelin basic protein gene control region which is active in oligodendrocyte cells in the brain (Readhead et al., 1987, Cell 48:703-712); myosin light chain-2 gene control region which is active in skeletal muscle (Sani, 1985, Nature 314:283-286); neuronal-specific enolase (NSE) which is active in neuronal cells (MoreUi et al., 1999, Gen. Virol.
  • NSE neuronal-specific enolase
  • BDNF brain-derived neurotrophic factor
  • GFAP glial fibrillary acidic protein
  • a vector in a specific embodiment, comprises a promoter operably linked to a VRPI-encoding nucleic acid, one or more origins of replication, and, optionally, one or more selectable markers (e.g., an antibiotic resistance gene).
  • an expression construct is made by subcloning a VRPI or a VRPI-related polypeptide coding sequence into the EcoRI restriction site of each of the three pG ⁇ X vectors (Glutathione S-Transferase expression vectors; Smith and
  • the VRPI coding sequence or VRPI-related polypeptide coding sequence may be ligated to an adenovirus transcription/translation control complex, e.g., the late promoter and tripartite leader sequence. This chimeric gene may then be inserted in the adenovirus genome by in vitro o ⁇ in vivo recombination.
  • Insertion in a non-essential region of the viral genome will result in a recombinant virus that is viable and capable of expressing the antibody molecule in infected hosts, (e.g., see Logan & Shenk, 1984, Proc. Natl. Acad. Sci. USA 81:355-359).
  • Specific initiation signals may also be required for efficient translation of inserted antibody coding sequences. These signals include the ATG initiation codon and adjacent sequences. Furthermore, the initiation codon must be in phase with the reading frame of the desired coding sequence to ensure translation of the entire insert.
  • These exogenous translational control signals and initiation codons can be of a variety of origins, both natural and synthetic. The efficiency of expression may be enhanced by the inclusion of appropriate transcription enhancer elements, franscription terminators, etc. (see Bittner et al., 1987, Methods in Enzymol 153:51-544).
  • Expression vectors containing inserts of a gene encoding a VRPI or a VRPI-related polypeptide can be identified by three general approaches: (a) nucleic acid hybridization, (b) presence or absence of "marker" gene functions, and (c) expression of inserted sequences.
  • the presence of a gene encoding a VRPI inserted in an expression vector can be detected by nucleic acid hybridization using probes comprising sequences that are homologous to an inserted gene encoding a VRPI.
  • the recombinant vector/host system can be identified and selected based upon the presence or absence of certain "marker" gene functions (e.g., thymidine kinase activity, resistance to antibiotics, transformation phenotype, occlusion body formation in baculovirus, etc.) caused by the insertion of a gene encoding a VRPI in the vector.
  • certain "marker" gene functions e.g., thymidine kinase activity, resistance to antibiotics, transformation phenotype, occlusion body formation in baculovirus, etc.
  • recombinant expression vectors can be identified by assaying the gene product (i. e. , VRPI) expressed by the recombinant. Such assays can be based, for example, on the physical or functional properties of the VRPI in in vitro assay systems, e.g., binding with anti-SPI antibody.
  • a host cell strain may be chosen which modulates the expression of the inserted sequences, or modifies and processes the gene product in the specific fashion desired. Expression from certain promoters can be elevated in the presence of certain inducers; thus, expression of the genetically engineered VRPI or VRPI-related polypeptide may be controlled.
  • different host cells have characteristic and specific mechanisms for the translational and post-translational processing and modification (e.g., glycosylation, phosphorylation of proteins). Appropriate cell lines or host systems can be chosen to ensure the desired modification and processing of the foreign protein expressed. For example, expression in a bacterial system will produce an unglycosylated product and expression in yeast will produce a glycosylated product.
  • Eukaryotic host cells which possess the cellular machinery for proper processing of the primary transcript, glycosylation, and phosphorylation of the gene product may be used.
  • mammalian host cells include but are not limited to CHO, VERY, BHK, Hela, COS, MDCK, HEK293, 3T3, WI38, and in particular, endothelial cell lines, and normal human cell lines such as, for example, normal human endothelial cells.
  • different vector/host expression systems may effect processing reactions to different extents.
  • cell lines which stably express the differentially expressed or pathway gene protein may be engineered.
  • host cells can be transformed with DNA controlled by appropriate expression control elements (e.g., promoter, enhancer, sequences, transcription terminators, polyadenylation sites, etc.), and a selectable marker.
  • appropriate expression control elements e.g., promoter, enhancer, sequences, transcription terminators, polyadenylation sites, etc.
  • engineered cells may be allowed to grow for 1-2 days in an enriched medium, and then are switched to a selective medium.
  • the selectable marker in the recombinant plasmid confers resistance to the selection and allows cells to stably integrate the plasmid into their chromosomes and grow to form foci which in turn can be cloned and expanded into cell lines.
  • This method may advantageously be used to engineer cell lines which express the differentially expressed or pathway gene protein.
  • Such engineered cell lines may be particularly useful in screening and evaluation of compounds that affect the endogenous activity of the differentially expressed or pathway gene protein.
  • a number of selection systems may be used, including but not limited to the he ⁇ es simplex virus thymidine kinase (Wigler, et al., 1977, Cell 11:223), hypoxanthine- guanine phosphoribosyltransferase (Szybalska & Szybalski, 1962, Proc. Natl. Acad. Sci. USA 48:2026), and adenine phosphoribosyltransferase (Lowy, et al., 1980, Cell 22:817) genes can be employed in tk " , hgprt " or aprt " cells, respectively.
  • antimetabolite resistance can be used as the basis of selection for dhfr, which confers resistance to methotrexate (Wigler, et al., 1980, Natl. Acad. Sci. USA 77:3567; O'Hare, et al., 1981, Proc. Natl. Acad. Sci. USA 78:1527); gpt, which confers resistance to mycophenolic acid (Mulligan & Berg, 1981, Proc. Natl. Acad. Sci. USA 78:2072); neo, which confers resistance to the aminoglycoside G-418 (Colberre- Garapin, et al., 1981, J. Mol. Biol. 150:1); and hygro, which confers resistance to hygromycin (Santerre, et al., 1984, Gene 30:147) genes.
  • the VRPI, fragment, analog, or derivative may be expressed as a fusion, or chimeric protein product (comprising the protein, fragment, analog, or derivative joined via a peptide bond to a heterologous protein sequence).
  • the polypeptides of the present invention may be fused with the constant domain of immunoglobulins (IgA, IgE, IgG, IgM), or portions thereof (CHI, CH2, CH3, or any combination thereof and portions thereof) resulting in chimeric polypeptides.
  • immunoglobulins IgA, IgE, IgG, IgM
  • CHI constant domain of immunoglobulins
  • CH2, CH3, or any combination thereof and portions thereof resulting in chimeric polypeptides.
  • Such fusion proteins may facilitate purification, increase half-life in vivo, and enhance the delivery of an antigen across an epithelial barrier to the immune system.
  • Nucleic acids encoding a VRPI, a fragment of a VRPI, a VRPI-related polypeptide, or a fragment of a VRPI-related polypeptide can fused to an epitope tag (e.g., the hemagglutinin ("HA") tag or flag tag) to aid in detection and purification of the expressed polypeptide.
  • an epitope tag e.g., the hemagglutinin ("HA") tag or flag tag
  • HA hemagglutinin
  • a system described by Janknecht et al. allows for the ready purification of non-denatured fusion proteins expressed in human cell lines (Janknecht et al, 1991, Proc. Natl. Acad. Sci. USA 88:8972-897).
  • Fusion proteins can be made by ligating the appropriate nucleic acid sequences encoding the desired amino acid sequences to each other by methods known in the art, in the proper coding frame, and expressing the chimeric product by methods commonly known in the art.
  • a fusion protein may be made by protein synthetic techniques, e.g., by use of a peptide synthesizer.
  • cDNA and genomic sequences can be cloned and expressed.
  • domains of some VRPIs are known in the art and have been described in the scientific literature. Moreover, domains of a VRPI can be identified using techniques known to those of skill in the art. For example, one or more domains of a VRPI can be identified by using one or more of the following programs: ProDom, TMpred, and
  • SAPS. ProDom compares the amino acid sequence of a polypeptide to a database of compiled domains (see, e.g., http://www.toulouse.inra.fr/prodom.html; Co ⁇ et F., Gouzy J. & Kahn D., 1999, Nucleic Acids Res., 27:263-267).
  • TMpred predicts membrane-spanning regions of a polypeptide and their orientation. This program uses an algorithm that is based on the statistical analysis of TMbase, a database of naturally occuring transmembrane proteins (see, e.g., http://ww.ch.embnet.org software/TMPRED form.html : Hofmann & Stoffel.
  • the skilled artisan can identify domains of a VRPI having enzymatic or binding activity, and further can identify nucleotide sequences encoding such domains. These nucleotide sequences can then be used for recombinant expression of VRPI fragments that retain the enzymatic or binding activity of the' VRPI.
  • a VRPI has an amino acid sequence sufficiently similar to an identified domain of a known polypeptide.
  • the term "sufficiently similar” refers to a first amino acid or nucleotide sequence which contains a sufficient number of identical or equivalent (e.g., with a similar side chain) amino acid residues or nucleotides to a second amino acid or nucleotide sequence such that the first and second amino acid or nucleotide sequences have or encode a common structural domain or common functional activity or both.
  • a VRPI domain can be assessed for its function using techniques well known to those of skill in the art.
  • a domain can be assessed for its kinase activity or for its ability to bind to DNA using techniques known to the skilled artisan.
  • Kinase activity can be assessed, for example, by measuring the ability of a polypeptide to phosphorylate a substrate.
  • DNA binding activity can be assessed, for example, by measuring the ability of a polypeptide to bind to a DNA binding element in a electromobility shift assay.
  • the function of a domain of a VRPI is determined using an assay described in one or more of the references identified in Table VEH infra. 5.10 Production of Antibodies to VRPIs
  • a VRPI, VRPI analog, VRPI-related protein or a fragment or derivative of any of the foregoing may be used as an immunogen to generate antibodies which immunospecifically bind such an immunogen.
  • immunogens can be isolated by any convenient means, including the methods described above.
  • antibody refers to immunoglobulin molecules and immunologically active portions of immunoglobulin molecules, i.e., molecules that contain an antigen binding site that specifically binds an antigen.
  • the immunoglobulin molecules of the invention can be of any class (e.g., IgG, IgE, IgM, IgD and IgA ) or subclass of immunoglobulin molecule.
  • antibodies that recognize gene products of genes encoding VRPIs are publicly available.
  • antibodies that recognize these VRPIs and/or their isoforms include antibodies recognizing VRPI-1, VRPI- 19 , VRPI-23, VRPI- 28.1 , VRPI-28.2 , VRPI-32.1, VRPI-36 , VRPI-38, VRPI-47.1 , VRPI-47.2 , VRPI-58 , VRPI-61 , VRPI-63, VRPI-68.1 , VRPI-68.2, VRPI-72, VRPI-86 ,
  • antibodies to a specific domain of a VRPI are produced.
  • hydrophilic fragments of a VRPI are used as immunogens for antibody production.
  • screening for the desired antibody can be accomplished by techniques known in the art, e.g. ELISA (enzyme-linked immunosorbent assay).
  • ELISA enzyme-linked immunosorbent assay
  • an antibody that specifically binds a first VRPI homolog but which does not specifically bind to (or binds less avidly to) a second VRPI homolog one can select on the basis of positive binding to the first VRPI homolog and a lack of binding to (or reduced binding to) the second VRPI homolog.
  • a different isoform of the same protein such as a different glycoform having the same core peptide as the VRPI
  • the present invention provides an antibody (preferably a t monoclonal antibody) that binds with greater affinity (preferably at least 2-fold, more preferably at least 5 -fold still more preferably at least 10-fold greater affinity) to a VRPI than to a different isoform or isoforms (e.g., glycoforms) of the VRPI.
  • an antibody preferably a t monoclonal antibody
  • binds with greater affinity preferably at least 2-fold, more preferably at least 5 -fold still more preferably at least 10-fold greater affinity
  • isoform or isoforms e.g., glycoforms
  • Polyclonal antibodies which may be used in the methods of the invention are heterogeneous populations of antibody molecules derived from the sera of immunized animals. Unfractionated immune serum can also be used. Various procedures known in the art may be used for the production of polyclonal antibodies to a VRPI, a fragment of a VRPI, a VRPI-related polypeptide, or a fragment of a VRPI-related polypeptide. In a particular embodiment, rabbit polyclonal antibodies to an epitope of a VRPI or a VRPI-related polypeptide can be obtained.
  • various host animals can be immunized by injection with the native or a synthetic (e.g., recombinant) version of a VRPI, a fragment of a VRPI, a VRPI-related polypeptide, or a fragment of a VRPI- related polypeptide, including but not limited to rabbits, mice, rats, etc.
  • the Preferred Technology described herein provides isolated VRPIs suitable for such immunization. If the VRPI is purified by gel electrophoresis, the VRPI can be used for immunization with or without prior extraction from the polyacrylamide gel.
  • adjuvants may be used to enhance the immunological response, depending on the host species, including, but not limited to, complete or incomplete Freund's adjuvant, a mineral gel such as aluminum hydroxide, surface active substance such as lysolecithin, pluronic polyol, a polyanion, a peptide, an oil emulsion, keyhole limpet hemocyanin, dinitrophenol, and an adjuvant such as BCG (bacille Calmette-Guerin) or corynebacterium parvum. Additional adjuvants are also well known in the art.
  • any technique which provides for the production of antibody molecules by continuous cell lines in culture may be used.
  • the hybridoma technique originally developed by Kohler and Milstein (1975, Nature 256:495-497), as well as the trioma technique, the human B-cell hybridoma technique (Kozbor et al., 1983, Immunology Today 4:72), and the EBV-hybridoma technique to produce human monoclonal antibodies Colde et al., 1985, in Monoclonal Antibodies and Cancer Therapy, Alan R.
  • Such antibodies may be of any immunoglobulin class including IgG, IgM, IgE, IgA, IgD and any subclass thereof.
  • the hybridoma producing the mAbs of the invention may be cultivated in vitro or in vivo.
  • monoclonal antibodies can be produced in germ-free animals utilizing known technology (PCT/US90/02545, inco ⁇ orated herein by reference).
  • the monoclonal antibodies include but are not limited to human monoclonal antibodies and chimeric monoclonal antibodies (e.g., human-mouse chimeras).
  • a chimeric antibody is a molecule in which different portions are derived from different animal species, such as those having a human immunoglobulin constant region and a variable region derived from a murine mAb. (See, e.g., Cabilly et al., U.S. Patent No 4,816,567; and Boss et al., U.S. Patent No.
  • Humanized antibodies are antibody molecules from non- human species having one or more complementarity determining regions (CDRs) from the non-human species and a framework region from a human immunoglobulin molecule.
  • CDRs complementarity determining regions
  • Chimeric and humanized monoclonal antibodies can be produced by recombinant DNA techniques known in the art, for example using methods described in PCT Publication No. WO 87/02671; European Patent Application 184,187; European Patent Application 171,496; European Patent Application 173,494; PCT Publication No. WO 86/01533; U.S. Patent No. 4,816,567; European Patent Application 125,023; Better et al., 1988, Science 240:1041-1043; Liu et al, 1987, Proc. Natl. Acad. Sci. USA 84:3439-3443; Liu et al., 1987, J. Immunol.
  • Completely human antibodies are particularly desirable for therapeutic treatment of human subjects.
  • Such antibodies can be produced using fransgenic mice which are incapable of expressing endogenous immunoglobulin heavy and light chains genes, but which can express human heavy and light chain genes.
  • the fransgenic mice are immunized in the normal fashion with a selected antigen, e.g., all or a portion of a VRPI of the invention.
  • Monoclonal antibodies directed against the antigen can be obtained using conventional hybridoma technology.
  • the human immunoglobulin fransgenes harbored by the fransgenic mice rearrange during B cell differentiation, and subsequently undergo class switching and somatic mutation.
  • it is possible to produce therapeutically useful IgG, IgA, IgM and IgE antibodies For an overview of this technology for producing human antibodies, see
  • Completely human antibodies which recognize a selected epitope can be generated using a technique referred to as "guided selection.”
  • a selected non- human monoclonal antibody e.g., a mouse antibody, is used to guide the selection of a completely human antibody recognizing the same epitope.
  • the antibodies of the present invention can also be generated using various phage display methods known in the art.
  • phage display methods functional antibody domains are disjplayed on the surface of phage particles which carry the polynucleotide sequences encoding them.
  • phage can be utilized to display antigen binding domains expressed from a repertoire or combinatorial antibody library (e.g., human or murine).
  • Phage expressing an antigen binding domain that binds the antigen of interest can be selected or identified with antigen, e.g., using labelled antigen or antigen bound or captured to a solid surface or bead.
  • Phage used in these methods are typically filamentous phage including fd and Ml 3 binding domains expressed from phage with Fab, Fv or disulfide stabilized Fv antibody domains recombinantly fused to either the phage gene III or gene VIII protein.
  • Phage display methods that can be used to make the antibodies of the present invention include those disclosed in Brinkman et al., J. Immunol. Methods 182:41-50 (1995); Ames et al., J. frnrnunol. Methods 184:177-186 (1995); Kettleborough et al., Eur. J. Immunol.
  • the antibody coding regions from the phage can be isolated and used to generate whole antibodies, including human antibodies, or any other desired antigen binding fragment, and expressed in any desired host, including mammalian cells, insect cells, plant cells, yeast, and bacteria, e.g., as described in detail below.
  • the invention further provides for the use of bispecif ⁇ c antibodies, which can be made by methods known in the art.
  • Traditional production of full length bispecific antibodies is based on the coexpression of two immunoglobulin heavy chain-light chain pairs, where the two chains have different specificities (Milstein et al., 1983, Nature 305:537-539). Because of the random assortment of immunoglobulin heavy and light chains, these hybridomas (quadromas) produce a potential mixture of 10 different antibody molecules, of which only one has the correct bispecific structure. Purification of the correct molecule, which is usually done by affinity chromatography steps, is rather cumbersome, and the product yields are low.
  • antibody variable domains with the desired binding specificities are fused to immunoglobulin constant domain sequences.
  • the fusion preferably is with an immunoglobulin heavy chain constant domain, comprising at least part of the hinge,
  • CHI first heavy-chain constant region
  • DNAs encoding the immunoglobulin heavy chain fusions and, if desired, the immunoglobulin light chain are inserted into separate expression vectors, and are co-transfected into a suitable host organism. This provides for great flexibility in adjusting the mutual proportions of the three polypeptide fragments in embodiments when unequal ratios of the three polypeptide chains used in the construction provide the optimum yields. It is, however, possible to insert the coding sequences for two or all three polypeptide chains in one expression vector when the expression of at least two polypeptide chains in equal ratios results in high yields or when the ratios are of no particular significance.
  • the bispecific antibodies are composed of a hybrid immunoglobulin heavy chain with a first binding specificity in one arm, and a hybrid immunoglobulin heavy chain-light chain pair (providing a second binding specificity) in the other arm. It was found that this asymmetric structure facilitates the separation of the desired bispecific compound from unwanted immunoglobulin chain combinations, as the presence of an immunoglobulin light chain in only one half of the bispecific molec ⁇ le provides for a facile way of separation.
  • This approach is disclosed in WO 94/04690 published March 3,1994.
  • For further details for generating bispecific antibodies see, for example, Suresh et al., Methods in Enzymology,1986, 121:210.
  • the invention provides functionally active fragments, derivatives or analogs of the anti-VRPI immunoglobulin molecules.
  • Functionally active means that the fragment, derivative or analog is able to elicit anti-anti-idiotype antibodies (i.e., tertiary antibodies) that recognize the same antigen that is recognized by the antibody from which the fragment, derivative or analog is derived.
  • antigenicity of the idiotype of the immunoglobulin molecule may be enhanced by deletion of framework and CDR sequences that are C-terminal to the CDR sequence that specifically recognizes the antigen.
  • synthetic peptides containing the CDR sequences can be used in binding assays with the antigen by any binding assay method known in the art.
  • the present invention provides antibody fragments such as, but not limited to, F(ab') 2 fragments and Fab fragments.
  • Antibody fragments which recognize specific epitopes may be generated by known techniques.
  • F(ab') 2 fragments consist of the variable region, the light chain constant region and the CHI domain of the heavy chain and are generated by pepsin digestion of the antibody molecule.
  • Fab fragments are generated by reducing the disulfide bridges of the F(ab') 2 fragments.
  • the invention also provides heavy chain and light chain dimers of the antibodies of the invention, or any minimal fragment thereof such as Fvs or single chain antibodies (SCAs) (e.g., as described in
  • the invention provides fusion proteins of the immunoglobulins of the invention (or functionally active fragments thereof), for example in which the immunoglobulin is fused via a covalent bond (e.g., a peptide bond), at either theN- terminus or the C-terminus to an amino acid sequence of another protein (or portion thereof, preferably at least 10, 20 or 50 amino acid portion of the protein) that is not the immunoglobulin.
  • a covalent bond e.g., a peptide bond
  • the immunoglobulin, or fragment thereof is covalently linked to the other protein at the N-terminus of the constant domain.
  • such fusion proteins may facilitate purification, increase half-life in vivo, and enhance the delivery of an antigen across an epithelial barrier to the immune system.
  • the immunoglobulins of the invention include analogs and derivatives that are either modified, i.e, by the covalent attachment of any type of molecule as long as such covalent attachment that does not impair immunospecific binding.
  • the derivatives and analogs of the immunoglobulins include those that have been further modified, e.g., by glycosylation, acetylation, pegylatipn, phosphylation, amidation, derivatization by known protecting/blocking groups, proteolytic cleavage, linkage to a cellular ligand or other protein, etc. Any of numerous chemical modifications may be carried out by known techniques, including, but not limited to specific chemical cleavage, acetylation, formylation, etc. Additionally, the analog or derivative may contain one or more non-classical amino acids.
  • the foregoing antibodies can be used in methods known in the art relating to the localization and activity of the VRPIs of the invention, e.g., for imaging these proteins, measuring levels thereof in appropriate physiological samples, in diagnostic methods, etc.
  • the antibodies of the invention can be produced by any method known in the art for the synthesis of antibodies, in particular, by chemical synthesis or by recombinant expression, and are preferably produced by recombinant expression techniques.
  • a nucleic acid encoding the antibody may be assembled from chemically synthesized oligonucleotides (e.g., as described in Kutineier et al., 1994, BioTechniques 17:242), which, briefly, involves the synthesis of overlapping oligonucleotides containing portions of the sequence encoding antibody, annealing and ligation of those oligonucleotides, and then amplification of the ligated oligonucleotides by PCR
  • the nucleic acid encoding the antibody may be obtained by cloning the antibody. If a clone containing the nucleic acid encoding the particular antibody is not available, but the sequence of the antibody molecule is known, a nucleic acid encoding the antibody may be obtained from a suitable source (e.g., an antibody cDNA library, or cDNA library generated from any tissue or cells expressing the antibody) by PCR amplification using synthetic primers hybridizable to the 3' and 5' ends of the sequence or by cloning using an oligonucleotide probe specific for the particular gene sequence.
  • a suitable source e.g., an antibody cDNA library, or cDNA library generated from any tissue or cells expressing the antibody
  • antibodies specific for a particular antigen may be generated by any method known in the art, for example, by immunizing an animal, such as a rabbit, to generate polyclonal antibodies or, more preferably, by generating monoclonal antibodies.
  • a clone encoding at least the Fab portion of the antibody may be obtained by screening Fab expression libraries (e.g., as described in Huse et al., 1989, Science 246:1275-1281) for clones of Fab fragments that bind the specific antigen or by screening antibody libraries (See, e.g., Clackson et al., 1991, Nature 352:624; Hane et al., 1997 Proc. Natl. Acad. Sci. USA 94:4937).
  • nucleic acid encoding at least the variable domain of the antibody molecule may be introduced into a vector containing the nucleotide sequence encoding the constant region of the antibody molecule (see, e.g., PCT Publication WO 86/05807; PCT Publication WO 89/01036; and U.S. Patent No. 5,122,464).
  • Vectors containing the complete light or heavy chain for co-expression with the nucleic acid to allow the expression of a complete antibody molecule are also available.
  • the nucleic acid encoding the antibody can be used to introduce the nucleotide substitution(s) or deletion(s) necessary to substitute (or delete) the one or more variable region cysteine residues participating in an intrachain disulfide bond with an amino acid residue that does not contain a sulfhydyl group.
  • Such modifications can be carried out by any method known in the art for the introduction of specific mutations or deletions in a nucleotide sequence, for example, but not limited to, chemical mutagenesis, in vitro site directed mutagenesis (Hutchinson et al., 1978, J. Biol. Chem. 253:6551), PCT based methods, etc.
  • a chimeric antibody is a molecule in which different portions are derived from different animal species, such as those having a variable region derived from a murine mAb and a human antibody constant region, e.g. , humanized antibodies.
  • the vector for the production of the antibody molecule may be produced by recombinant DNA technology using techniques well known in the art.
  • methods for preparing the protein of the invention by expressing nucleic acid containing the antibody molecule sequences are described herein. Methods which are well known to those skilled in the art can be used to construct expression vectors containing an antibody molecule coding sequences and appropriate transcriptional and translational control signals. These methods include, for example, in vitro recombinant DNA techniques, synthetic techniques, and in vivo genetic recombination. See, for example, the techniques described in Sambrook et al.
  • the expression vector is transferred to a host cell by conventional techniques and the transfected cells are then cultured by conventional techniques to produce an antibody of the invention.
  • the host cells used to express a recombinant antibody of the invention may be either bacterial cells such as Escherichia coli, or, preferably, eukaryotic cells, especially for the expression of whole recombinant antibody molecule.
  • mammalian cells such as Chinese hamster ovary cells (CHO), in conjunction with a vector such as the major intermediate early gene promoter element from human cytomegalo virus is an effective expression system for antibodies (Foecking et al., 198, Gene 45:101;
  • host-expression vector systems may be utilized to express an antibody molecule of the invention.
  • Such host-expression systems represent vehicles by which the coding sequences of interest may be produced and subsequently purified, but also represent cells which may, when transformed or transfected with the appropriate nucleotide coding sequences, express the antibody molecule of the invention in situ.
  • These include but are not limited to microorganisms such as bacteria (e.g., E. coli, B. subtilis) transformed with recombinant bacteriophage DNA, plasmid DNA or cosmid DNA expression vectors containing antibody coding sequences; yeast (e.g., E. coli, B. subtilis) transformed with recombinant bacteriophage DNA, plasmid DNA or cosmid DNA expression vectors containing antibody coding sequences; yeast (e.g., E. coli, B. subtilis) transformed with recombinant bacteriophage DNA, plasmid DNA or cosmid DNA expression vectors containing antibody coding sequences;
  • Saccharomyces, Pichia transformed with recombinant yeast expression vectors containing antibody coding sequences; insect cell systems infected with recombinant virus expression vectors (e.g., baculo virus) containing the antibody coding sequences; plant cell systems infected with recombinant virus expression vectors (e.g., cauliflower mosaic virus, CaMN; tobacco mosaic virus, TMN) or transformed with recombinant plasmid expression vectors (e.g., Ti plasmid) containing antibody coding sequences; or mammalian cell systems (e.g., COS, CHO, BHK, H ⁇ K293, 3T3 cells) harboring recombinant expression constructs containing promoters derived from the genome of mammalian cells (e.g., metallothionein promoter) or from mammalian viruses (e.g., the adenovirus late promoter; the vaccinia virus 7.5K promoter).
  • promoters derived from
  • a number of expression vectors may be advantageously selected depending upon the use intended for the antibody molecule being expressed.
  • vectors which direct the expression of high levels of fusion protein products that are readily purified may be desirable.
  • Such vectors include, but are not limited, to the E. coli expression vector pUR278 (Ruther et al., 1983, ⁇ MBO J. 2:1791), in which the antibody coding sequence may be ligated individually into the vector in frame with the lac Z coding region so that a fusion protein is produced; pIN vectors (Inouye & Inouye, 1985, Nucleic Acids Res. 13:3101-3109; Van Heeke & Schuster, 1989, J. Biol. Chem.
  • pG ⁇ X vectors may also be used to express foreign polypeptides as fusion proteins with glutathione S-fransferase (GST).
  • GST glutathione S-fransferase
  • fusion proteins are soluble and can easily be purified from lysed cells by adso ⁇ tion and binding to a matrix glutathione-agarose beads followed by elution in the presence of free glutathione.
  • the pG ⁇ X vectors are designed to include thrombin or factor Xa protease cleavage sites so that the cloned target gene product can be released from the GST moiety.
  • Autographa californica nuclear polyhedrosis virus (AcNPN) is used as a vector to express foreign genes.
  • the virus grows in Spodoptera frugiperda cells.
  • the antibody coding sequence may be cloned individually into non-essential regions (for example the polyhedrin gene) of the virus and placed under control of an Ac ⁇ PN promoter (for example the polyhedrin promoter).
  • an Ac ⁇ PN promoter for example the polyhedrin promoter.
  • a number of viral-based expression systems e.g., an adenovirus expression system may be utilized.
  • a host cell strain may be chosen which modulates the expression of the inserted sequences, or modifies and processes the gene product in the specific fashion desired. Such modifications (e.g., glycosylation) and processing (e.g., cleavage) of protein products may be important for the function of the protein.
  • stable expression is preferred.
  • cells lines that stably express an antibody of interest can be produced by transfecting the cells with an expression vector comprising the nucleotide sequence of the antibody and the nucleotide sequence of a selectable (e.g., neomycin or hygromycin), and selecting for expression of the selectable marker.
  • a selectable e.g., neomycin or hygromycin
  • the expression levels of the antibody molecule can be increased by vector amplification (for a review, see Bebbington and Hentschel, The use of vectors based on gene amplification for the expression of cloned genes in mammalian cells in DNA cloning. Nol.3. (Academic Press, New York, 1987)).
  • vector amplification for a review, see Bebbington and Hentschel, The use of vectors based on gene amplification for the expression of cloned genes in mammalian cells in DNA cloning. Nol.3. (Academic Press, New York, 1987)).
  • a marker in the vector system expressing antibody is amplifiable
  • increase in the level of inhibitor present in culture of host cell will increase the number of copies of the marker gene. Since the amplified region is associated with the antibody gene, production of the antibody will also increase (Grouse et al., 1983, Mol. Cell. Biol. 3:257).
  • the host cell may be co-transfected with two expression vectors of the invention, the first vector encoding a heavy chain derived polypeptide and the second vector encoding a light chain derived polypeptide.
  • the two vectors may contain identical selectable markers which enable equal expression of heavy and light chain polypeptides.
  • a single vector may be used which encodes both heavy and light chain polypeptides. In such situations, the light chain should be placed before the heavy chain to avoid an excess of toxic free heavy chain (Proudfoot, 1986, Nature 322:52; Kohler, 1980, Proc. Natl. Acad. Sci. USA 77:2197).
  • the coding sequences for the heavy and light chains may comprise cDNA or genomic DNA.
  • the antibody molecule of the invention may be purified by any method known in the art for purification of an antibody molecule, for example, by chromatography (e.g., ion exchange chromatography, affinity chromatography such as with protein A or specific antigen, and sizing column chromatography), centrifugation, differential solubility, or by any other standard technique for the purification of proteins.
  • chromatography e.g., ion exchange chromatography, affinity chromatography such as with protein A or specific antigen, and sizing column chromatography
  • centrifugation e.g., centrifugation, differential solubility, or by any other standard technique for the purification of proteins.
  • any fusion protein may be readily purified by utilizing an antibody specific for the fusion protein being expressed.
  • an antibody specific for the fusion protein being expressed For example, a system described by
  • Janknecht et al. allows for the ready purification of non-denatured fusion proteins expressed in human cell lines (Janknecht et al., 1991, Proc. Natl. Acad. Sci. USA 88:8972-897).
  • the gene of interest is subcloned into a vaccinia recombination plasmid such that the open reading frame of the gene is translationally fused to an amino-terminal tag consisting of six histidine residues.
  • the tag serves as a matrix binding domain for the fusion protein. Extracts from cells infected with recombinant vaccinia virus are loaded onto Ni2+ nitriloacetic acid-agarose columns and histidine-tagged proteins are selectively eluted with imidazole-containing buffers.
  • anti-VRPI antibodies or fragments thereof are conjugated to a diagnostic or therapeutic moiety.
  • the antibodies can be used for diagnosis or to determine the efficacy of a given treatment regimen. Detection can be facilitated by coupling the antibody to a detectable substance.
  • detectable substances include various enzymes, prosthetic groups, fluorescent materials, luminescent materials, bioluminescent materials, radioactive nuclides, positron emitting metals (for use in positron emission tomography), and nonradioactive paramagnetic metal ions. See generally U.S. Patent No. 4,741,900 for metal ions which can be conjugated to antibodies for use as diagnostics according to the present invention.
  • Suitable enzymes include horseradish peroxidase, alkaline phosphatase, beta-galactosidase, or acetylcholinesterase; suitable prosthetic groups include sfreptavidin, avidin and biotin; suitable fluorescent materials include umbelliferone, fluorescein, fluorescein isothiocyanate, rhodamine, dichlorotriazinylamine fluorescein, dansyl chloride and phycoerythrin; suitable luminescent materials include luminol; suitable bioluminescent materials include luciferase, luciferin, and aequorin; and suitable radioactive nuclides include 125 Is 131 Is ll ljn a d 99 ⁇ c .
  • an anti-VRPI antibodies or fragments thereof can be conjugated to a therapeutic agent or drug moiety to modify a given biological response.
  • the therapeutic agent or drug moiety is not to be construed as limited to classical chemical therapeutic agents.
  • the drug moiety may be a protein or polypeptide possessing a desired biological activity.
  • Such proteins may include, for example, a toxin such as abrin, ricin A, pseudomonas exotoxin, or diphtheria toxin; a protein such as tumor necrosis factor, ⁇ -interferon, ⁇ -interferon, nerve growth factor, platelet derived growth factor, tissue plasminogen activator, a thrombotic agent or an anti-angiogenic agent, e.g., angiostatin or endostatin; or, a biological response modifier such as a lymphokine, interleukin-1 (IL-1), interleukin-2 (IL-2), interleukin-6 (IL-6), granulocyte macrophage colony stimulating factor (GM-blood), granulocyte colony stimulating factor (G-blood), nerve growth factor (NGF) or other growth factor.
  • a toxin such as abrin, ricin A, pseudomonas exotoxin, or diphtheria toxin
  • a protein such as tumor necrosis factor, ⁇ -
  • an antibody can be conjugated to a second antibody to form an antibody heteroconjugate as described by. Segal in U.S. Patent No. 4,676,980.
  • An antibody with or without a therapeutic moiety conjugated to it can be used as a therapeutic that is administered alone or in combination with cytotoxic factor(s) and/or cytokine(s).
  • test samples of blood, serum, plasma or urine obtained from a subject suspected of having or known to have vascular response can be used for diagnosis or monitoring.
  • a decreased abundance of one or more VRFs or VRPIs (or any combination of them) in a test sample relative to a control sample (from a subject or subjects free from vascular response) or a previously determined reference range indicates the presence of vascular response;
  • VRFs and VRPIs suitable for this piupose are identified in Tables I and IV, respectively, as described in detail above.
  • an increased abundance of one or more VRFs or VRPIs (or any combination of them) in a test sample compared to a control sample or a previously determined reference range indicates the presence of vascular response; VRFs and VRPIs suitable for this pu ⁇ ose are identified in Tables II and V, respectively, as described in detail above.
  • the relative abundance of one or more VRFs or VRPIs (or any combination of them) in a test sample compared to a control sample or a previously determined reference range indicates a subtype of vascular response (e.g., familial or sporadic vascular response).
  • the relative abundance of one or more VRFs or VRPIs (or any combination of them) in a test sample relative to a confrol sample or a previously determined reference range indicates the degree or severity of vascular response.
  • detection of one or more VRPIs described herein may optionally be combined with detection of one or more additional biomarkers for vascular response including, but not limited to apolipoprotein Al (Apo E).
  • Any suitable method in the art can be employed to measure the level of VRFs and VRPIs, including but not limited to the Preferred Technology described herein, kinase assays, immunoassays to detect and/or visualize the VRPI (e.g.
  • a VRPI has a known function
  • an assay for that function may be used to measure VRPI expression.
  • a decreased abundance of mRNA including one or more VRPIs identified in Table IV (or any combination of them) in a test sample relative to a confrol sample or a previously determined reference range indicates the presence of vascular response.
  • an increased abundance of mRNA encoding one or more VRPIs identified in Table V (or any combination of them) in a test sample relative to a confrol sample or previously determined reference range indicates the presence of vascular response.
  • Any suitable hybridization assay can be used to detect VRPI expression by detecting and/or visualizing mRNA encoding the VRPI (e.g., Northern assays, dot blots, in situ hybridization, etc.).
  • labeled antibodies, derivatives and analogs thereof, which specifically bind to a VRPI can be used for diagnostic pu ⁇ oses to detect, diagnose, or monitor vascular response.
  • vascular response is detected in an animal, more preferably in a mammal and most preferably in a human.
  • the invention provides methods for identifying agents (e.g. drug candidates or test compounds) environmental factors that bind to a VRPI or have a stimulatory or inhibitory effect on the expression or activity of a VRPI.
  • agents e.g. drug candidates or test compounds
  • the invention also provides methods of identifying agents that bind to a VRPI-related polypeptide or a VRPI fusion protein or have a stimulatory or inhibitory effect on the expression or activity of a VRPI-related polypeptide or a VRPI fusion protein.
  • agents, candidate compounds or test compounds include, but are not limited to, nucleic acids (e.g., DNA and RNA), carbohydrates, lipids, proteins, peptides, peptidomimetics, small molecules and other drugs.
  • Agents can be obtained using any of the numerous approaches in combinatorial library methods known in the art, including: biological libraries; spatially addressable parallel solid phase or solution phase libraries; synthetic library methods requiring deconvolution; the "one-bead one- compound” library method; and synthetic library methods using affinity chromatography selection.
  • the biological library approach is limited to peptide libraries, while the other four approaches are applicable to peptide, non-peptide oligomer or small molecule libraries of compounds (Lam, 1997, Anticancer Drug Des. 12:145; U.S. Patent No. 5,738,996; and U.S. Patent No.5,807,683, each of which is inco ⁇ orated herein in its entirety by reference).
  • Libraries of compounds may be presented, e.g., presented in solution (e.g., Houghten, 1992, Bio/Techniques 13:412-421), or on beads (Lam, 1991, Nature 354:82-84), chips (Fodor, 1993, Nature 364:555-556), bacteria (U.S. Patent No. 5,223,409), spores (Patent Nos. 5,571,698; 5,403,484; and 5,223,409), plasmids (Cull et al., 1992, Proc. Natl. Acad. Sci.
  • agents that do or do not interact with (i.e., bind to) a VRPI, a VRPI fragment (e.g. a functionally active fragment), a VRPI-related polypeptide, a fragment of a VRPI-related polypeptide, or a VRPI fusion protein are identified in a cell-based assay system.
  • cells expressing a VRPI, a fragment of a VRPI, a VRPI-related polypeptide, a fragment of a VRPI- related polypeptide, or a VRPI fusion protein are contacted with an agent, such as a drug candidate, or a control and the ability of the agent to interact with the VRPI is determined.
  • this assay may be used to screen a plurality (e.g. a library) of candidate compounds.
  • the cell for example, can be of prokaryotic origin (e.g., E. coli) or eukaryotic origin (e.g., yeast or mammalian). Further, the cells can express the VRPI, fragment of the VRPI, VRPI-related polypeptide, a fragment of the VRPI- related polypeptide, or a VRPI fusion protein endogenously or be genetically engineered to express the VRPI, fragment of the VRPI, VRPI-related polypeptide, a fragment of the VRPI-related polypeptide, or a VRPI fusion protein.
  • the VRPI, fragment of the VRPI, VRPI-related polypeptide, a fragment of the VRPI-related polypeptide, or a VRPI fusion protein or the candidate compound is labeled, for example with a radioactive label (such as 32 P, 35 S or 1 5 I) or a fluorescent label (such as fluorescein isothiocyanate, rhodamine, phycoerythrin, phycocyanin, allophycocyanin, o ⁇ phthaldehyde or fluorescamine) to enable detection of an interaction between a VRPI and an agent, such as a drug candidate.
  • a radioactive label such as 32 P, 35 S or 1 5 I
  • a fluorescent label such as fluorescein isothiocyanate, rhodamine, phycoerythrin, phycocyanin, allophycocyanin, o ⁇ phthaldehyde or fluorescamine
  • VRPI fusion protein can be determined by methods known to those of skill in the art. For example, the interaction between an agent and a VRPI, a fragment of a VRPI, a VRPI-related polypeptide, a fragment of a VRPI-related polypeptide, or a VRPI fusion protein can be determined by flow cytometry, a scintillation assay, immunoprecipitation or western blot analysis.
  • agents that do or do not interact with (i.e., bind to) a VRPI, a VRPI fragment (e.g., a functionally active fragment) a VRPI-related polypeptide, a fragment of a VRPI-related polypeptide, or a VRPI fusion protein are identified in a cell-free assay system.
  • a native or recombinant VRPI or fragment thereof, or a native or recombinant VRPI-related polypeptide or fragment thereof, or a VRPI-fusion protein or fragment thereof is contacted with an agent or a control and the ability of the agent to interact with the VRPI or VRPI- related polypeptide, or VRPI fusion protein is determined.
  • this assay may be used to screen a plurality (e.g. a library) of agents.
  • the VRPI, VRPI fragment, VRPI-related polypeptide, a fragment of a VRPI-related polypeptide, or a VRPI-fusion protein is first immobilized, by, for example, contacting the VRPI, VRPI fragment, VRPI-related polypeptide, a fragment of a VRPI-related polypeptide, or a VRPI fusion protein with an immobilized antibody which specifically recognizes and binds it, or by contacting a purified preparation of the VRPI, VRPI fragment, VRPI- related polypeptide, fragment of a VRPI-related polypeptide, or a VRPI fusion protein with a surface designed to bind proteins, he VRPI, VRPI fragment, VRPI-related polypeptide, a fragment of a VRPI-related polypeptide, or a VRPI fusion protein may be partially or completely purified (e.g., partially or completely free of other polypeptides)
  • the VRPI, VRPI fragment, VRPI-related polypeptide, a fragment of a VRPI-related polypeptide may be a fusion protein comprising the VRPI or a biologically active portion thereof, or VRPI-related polypeptide and a domain such as glutathionine-S-transferase.
  • the VRPI, VRPI fragment, VRPI-related polypeptide, fragment of a VRPI-related polypeptide or VRPI fusion protein can be biotinylated using techniques well known to those of skill in the art (e.g. , biotinylation kit, Pierce Chemicals; Rockford, IL).
  • the ability of the agent to interact with a VRPI, VRPI fragment, VRPI-related polypeptide, a fragment of a VRPI-related polypeptide, or a VRPI fusion protein can be determined by methods known to those of skill in the art.
  • a cell-based assay system is used to identify agents that bind to or modulate the activity of a protein, such as an enzyme, or a biologically active portion thereof, which is responsible for the production or degradation of a VRPI or is responsible for the post-translational modification of a VRPI.
  • a plurality e.g., a library
  • agents e.g.
  • drug candidates are contacted with cells that naturally or recombinantly express: (i) a VRPI, an isoform of a VRPI, a VRPI homolog a VRPI-related polypeptide, a VRPI fusion protein, or a biologically active fragment of any of the foregoing; and (ii) a protein that is responsible for processing of the VRPI, VRPI isoform, VRPI homolog, VRPI-related polypeptide, VRPI fusion protein, or fragment in order to identify compounds that modulate the production, degradation, or post-translational modification of the VRPI, VRPI isoform, VRPI homolog, VRPI-related polypeptide, VRPI fusion protein or fragment. If desired, agents.
  • the ability of the agent to modulate the production, degradation or post-translational modification of a VRPI, isoform, homolog, VRPI-related polypeptide, or VRPI fusion protein can be determined by methods known to those of skill in the art, including without limitation, flow cytometry, a scintillation assay, immunoprecipitation and western blot analysis.
  • agents that do or do not competitively interact with (i.e., bind to) a VRPI, VRPI fragment, VRPI-related polypeptide, a fragment of a VRPI-related polypeptide, or a VRPI fusion protein are identified in a competitive binding assay.
  • cells expressing a VRPI, VRPI fragment, VRPI- related polypeptide, a fragment of a VRPI-related polypeptide, or a VRPI fusion protein are contacted with an agents and a compound known to interact with the VRPI, VRPI fragment, VRPI-related polypeptide, a fragment of a VRPI-related polypeptide or a VRPI fusion protein; the ability of the agent to competitively interact with the VRPI, VRPI fragment, VRPI-related polypeptide, fragment of a VRPI-related polypeptide, or a VRPI fusion protein is then determined.
  • agents that competitively interact with (i.e., bind to) a VRPI, VRPI fragment, VRPI-related polypeptide or fragment of a VRPI-related polypeptide are identified in a cell-free assay system by contacting a VRPI, VRPI fragment, VRPI-related polypeptide, fragment of a VRPI-related polypeptide, or a VRPI fusion protein with a candidate agent and a compound known to interact with the VRPI, VRPI-related polypeptide or VRPI fusion protein.
  • the ability of the candidate agent to interact with a VRPI, VRPI fragment, VRPI-related polypeptide, a fragment of a VRPI-related polypeptide, or a VRPI fusion protein can be determined by methods known to those of skill in the art. These assays, whether cell-based or cell-free, can be used to screen a plurality (e.g., a library) of candidate agents.
  • agents that do or do not modulate (i.e., upregulate or downregulate) the expression of a VRPI, or a VRPI-related polypeptide are identified by contacting cells (e.g., cells of prokaryotic origin or eukaryotic origin) expressing the VRPI, or VRPI-related polypeptide with a candidate agent or a control (e.g., phosphate buffered saline (PBS)) and determining the expression of the VRPI, VRPI- related polypeptide, or VRPI fusion protein, mRNA encoding the VRPI, or mRNA encoding the VRPI-related polypeptide.
  • a candidate agent or a control e.g., phosphate buffered saline (PBS)
  • VRPI-related polypeptide, mRNA encoding the VRPI, or mRNA encoding the VRPI- related polypeptide in the presence of the candidate agent is compared to the level of expression of the VRPI, VRPI-related polypeptide, mRNA encoding the VRPI, or mRNA encoding the VRPI-related polypeptide in the absence of the candidate agent(e.g., in the presence of a confrol).
  • the candidate agent can then be identified as a modulator of the expression of the VRPI, or a VRPI-related polypeptide based on this comparison.
  • the candidate agent when expression of the VRPI or mRNA is significantly greater in the presence of the candidate agent than in its absence, the candidate agent is identified as a stimulator of expression of the VRPI or mRNA.
  • the candidate agent when expression of the VRPI or mRNA is significantly less in the presence of the candidate agent than in its absence, the candidate agent is identified as an inhibitor of the expression of the VRPI or mRNA.
  • the level of expression of a VRPI or the mRNA that encodes it can be determined by methods known to those of skill in the art. For example, mRNA expression can be assessed by Northern blot analysis or RT-PCR, and protein levels can be assessed by western blot analysis.
  • agents that do or do not modulate the activity of a VRPI, or a VRPI-related polypeptide are identified by contacting a preparation containing the VRPI or VRPI-related polypeptide, or cells (e.g., prokaryotic or eukaryotic cells) expressing the VRPI or VRPI-related polypeptide with a test agent or a control and dete ⁇ nining the ability of the test agent to modulate (e.g., stimulate or inhibit) the activity of the VRPI or VRPI-related polypeptide.
  • the activity of a VRPI or a VRPI- related polypeptide can be assessed by detecting induction of a cellular signal transduction pathway of the VRPI or VRPI-related polypeptide (e.g.
  • detecting catalytic or enzymatic activity of the target on a suitable substrate detecting, the induction of a reporter gene (e.g., a regulatory element that is responsive to a VRPI or a VRPI-related polypeptide and is operably linked to a nucleic acid encoding a detectable marker, e.g., luciferase), or detecting a cellular response, for example, cellular differentiation, or cell proliferation.
  • a reporter gene e.g., a regulatory element that is responsive to a VRPI or a VRPI-related polypeptide and is operably linked to a nucleic acid encoding a detectable marker, e.g., luciferase
  • a cellular response for example, cellular differentiation, or cell proliferation.
  • Suitable confrol compounds include phosphate buffered saline (PBS) and normal saline (NS).
  • agents that do or do not modulate i.e., upregulate or downregulate
  • the expression, activity or both the expression and activity of a VRPI or VRPI-related polypeptide are identified in an animal model.
  • suitable animals include, but are not limited to, mice, rats, rabbits, monkeys, guinea pigs, dogs and cats.
  • the animal used represent a model of vascular response.
  • the test agent or a control is administered (e.g., orally, rectally or parenterally such as infraperitoneally or intravenously) to a suitable animal and the effect on the expression, activity or both expression and activity of the VRPI or VRPI-related polypeptide is determined.
  • Changes in the expression of a VRPI or VRPI-related polypeptide can be assessed by the methods outlined above.
  • the agents tested are advantageously agents which will be administered systemically , e.g. intravenously, since it is such agents that are most likely to induce an unwanted vascular response e.g. vasculitis.
  • a VRPI or VRPI-related polypeptide is used as a "bait protein" in a two-hybrid assay or three hybrid assay to identify other proteins that bind to or interact with a VRPI or VRPI-related polypeptide
  • a VRPI or VRPI-related polypeptide see, e.g., U.S. Patent No. 5,283,317; Zervos et al. (1993) Cell 72:223-232; Madura et al. (1993) J. Biol. Chem. 268: 12046-12054; Bartel et al. (1993) Bio/Techniques 14:920-924; Iwabuchi et al. (1993) Oncogene 8:1693-1696; and PCT Publication No.
  • binding proteins are also likely to be involved in the propagation of signals by the VRPIs of the invention as, for example, upstream or downstream elements of a signaling pathway involving the VRPIs of the invention.
  • Table VIII enumerates scientific publications describing suitable assays for detecting or quantifying enzymatic or binding activity of a VRPI, a VRPI analog, a VRPI- related polypeptide, or a fragment of any of the foregoing. Each such reference is hereby inco ⁇ orated in its entirety.
  • as assay referenced in Table VII is used in the screens and assays described herein, for example to screen for or identify a compound that modulates the activity of (or that modulates both the expression and activity of) a VRPI, VRPI analog, or VRPI-related polypeptide, a fragment of any of the foregoing.
  • the invention provides methods for the identification of agents which will not have an effect on the expression or activity of a VRPI, VRPI- related polypeptide or VRPI fusion protein, and as such will not induce a vascular response.
  • agents When such agents are drug candidiates they can be propgressed into development with a greater level of confidence that they will not produce unwanted vascular responses when administered clinically.
  • This aspect of the invention allows for toxicity screening to be carried out at a much earlier stage. In particular, it can show whether agent will or will not induce vascular response. In relation to the screening of agents for their potential to induce an unwanted vascular response.
  • agent is used herein to describe a wide variety of physical, chemical or biological factors.
  • physical agents include, without limitation, the diet of a subject, a change in temperature or humidity, exposure to ultraviolet radiation and the like.
  • Biological and chemical agents include exogenous factors such as pharmaceutical compounds (including candidate compounds and test compounds), toxic compounds, proteins, peptides, chemical compositions, natural pathogens, such as microbial agents including bacteria, viruses and lower eukaryotic cells such as fungi, yeast and simple multicellular organisms, as well as endogenous factors which occur naturally in the body, including, without limitation, hormones, enzymes, receptors, ligands and the like, which may or may not be recombinant.
  • This invention further provides novel agents identified by the above-described screening assays and uses thereof for treatments as described herein.
  • the invention provides for treatment or prevention of various diseases and disorders by administration of a therapeutic compound.
  • Such compounds include but are not limited to: VRPIs, VRPI analogs, VRPI-related polypeptides and derivatives (including fragments) thereof; antibodies to the foregoing; nucleic acids encoding VRPIs, VRPI analogs, VRPI-related polypeptides and fragments thereof; antisense nucleic acids to a gene encoding a VRPI or VRPI-related polypeptide; and modulator (e.g., agonists and antagonists) of a gene encoding a VRPI or VRPI-related polypeptide.
  • An important feature of the present invention is the identification of genes encoding VRPIs involved in vascular response. Vascular response can be treated (e.g.
  • one or more antibodies each specifically binding to a VRPI are administered alone or in combination with one or more additional therapeutic compounds or treatments.
  • a biological product such as an antibody is allogeneic to the subject to which it is administered.
  • a human VRPI or a human VRPI-related polypeptide, a nucleotide sequence encoding a human VRPI or a human VRPI-related polypeptide, or an antibody to a human VRPI or a human VRPI-related polypeptide is administered to a human subject for therapy (e.g. to ameliorate symptoms or to retard onset or progression) or prophylaxis.
  • Vascular response is treated or prevented by adminisfration to a subject suspected of having or known to have vascular response or to be at risk of developing vascular response of a compound that modulates (i.e., increases or decreases) the level or activity (i.e., function) of one or more VRPIs ⁇ or the level of one or more VRFs ⁇ that are differentially present in the blood of subjects having vascular response compared with blood of subjects free from vascular response.
  • vascular response is treated or prevented by administering to a subject suspected of having or known to have vascular response or to be at risk of developing vascular response a compound that upregulates (i.e., increases) the level or activity (i.e., function) of one or more VRPIs ⁇ or the level of one or more VRFs — that are decreased in the blood of subjects having vascular response.
  • a compound is administered that upregulates the level or activity (i.e., function) of one or more VRPIs — or the level of one or more VRFs ⁇ that are increased in the blood of subjects having vascular response.
  • Examples of such a compound include but are not limited to: VRPIs, VRPI fragments and VRPI-related polypeptides; nucleic acids encoding a VRPI, a VRPI fragment and a VRPI-related polypeptide (e.g., for use in gene therapy); and, for those VRPIs or VRPI-related polypeptides with enzymatic activity, compounds or molecules known to modulate that enzymatic activity.
  • Vascular response is also treated or prevented by administration to a subject suspected of having or known to have vascular response or to be at risk of developing vascular response of a compound that downregulates the level or activity of one or more VRPIs — or the level of one or more VRFs — that are increased in the blood of subjects having vascular response.
  • a compound is administered that downregulates the level or activity of one or more VRPIs ⁇ or the level of one or more VRFs ⁇ that are decreased in the blood of subjects having vascular response.
  • VRPI antisense oligonucleotides examples include, but are not limited to, VRPI antisense oligonucleotides, ribozymes, antibodies directed against VRPIs, and compounds that inhibit the enzymatic activity of a VRPI.
  • Other useful compounds e.g., VRPI antagonists and small molecule VRPI antagonists, can be identified using in vitro assays.
  • therapy or prophylaxis is tailored to the needs of an individual subject.
  • compounds that promote the level or function of one or more VRPIs, or the level of one or more VRFs are therapeutically or prophylactically administered to a subject suspected of having or known to have vascular response, in whom the levels or functions of said one or more VRPIs, or levels of said one or more VRFs, are absent or are decreased relative to a control or normal reference range.
  • compounds that promote the level or function of one or more VRPIs, or the level of one or more VRFs are therapeutically or prophylactically administered to a subject suspected of having or known to have vascular response in whom the levels or functions of said one or more VRPIs, or levels of said one or more VRFs, are increased relative to a control or to a reference range.
  • compounds that decrease the level or function of one or more VRPIs, or the level of one or more VRFs are therapeutically or prophylactically administered to a subject suspected of having or known to have vascular response in whom the levels or functions of said one or more VRPIs, or levels of said one or more VRFs, are increased relative to a confrol or to a reference range.
  • compounds that decrease the level or function of one or more VRPIs, or the level of one or more VRFs are therapeutically or prophylactically administered to a subject suspected of having or known to have vascular response in whom the levels or functions of said one or more VRPIs, or levels of said one or more
  • VRFs are decreased relative to a confrol or to a reference range.
  • the change in VRPI function or level, or VRF level, due to the administration of such compounds can be readily detected, e.g., by obtaining a sample (e.g., a sample of blood, blood or urine or a tissue sample such as biopsy tissue) and assaying in vitro the levels of said VRFs oi the levels or activities of said VRPIs, or the levels of mRNAs encoding said VRPIs. or any combination of the foregoing.
  • a sample e.g., a sample of blood, blood or urine or a tissue sample such as biopsy tissue
  • Such assays can be performed before and after the administration of the compound as described herein.
  • the compounds of the invention include but are not limited to any compound, e.g., a small organic molecule, protein, peptide, antibody, nucleic acid, etc. that restores the vascular response VRPI or VRF profile towards normal.
  • nucleic acids comprising a sequence encoding a VRPI, a
  • VRPI fragment, VRPI-related polypeptide or fragment of a VRPI-related polypeptide are administered to promote VRPI function by way of gene therapy.
  • Gene therapy refers to admimstration to a subject of an expressed or expressible nucleic acid.
  • the nucleic acid produces its encoded polypeptide that mediates a therapeutic effect by promoting VRPI function.
  • the compound comprises a nucleic acid encoding a VRPI or fragment or chimeric protein thereof, said nucleic acid being part of an expression vector that expresses a VRPI or fragment or chimeric protein thereof in a suitable host.
  • such a nucleic acid has a promoter operably linked to the VRPI coding region, said promoter being inducible or constitutive (and, optionally, tissue-specific).
  • a nucleic acid molecule is used in which the VRPI coding sequences and any other desired sequences are flanked by regions that promote homologous recombination at a desired site in the genome, thus providing for infrachromosomal expression of the VRPI nucleic acid (Koller and Smithies, 1989, Proc. Natl. Acad. Sci. USA 86:8932-8935; Zijlstra et al., 1989, Nature 342:435-438).
  • Delivery of the nucleic acid into a subject may be direct, in which case the subject is directly exposed to the nucleic acid or nucleic acid-carrying vector; this approach is known as in vivo gene therapy.
  • delivery of the nucleic acid into the subject may be indirect, in which case cells are first transformed with the nucleic acid in vitro and then transplanted into the subject; this approach is known as ex vivo gene therapy.
  • the nucleic acid is directly administered in vivo, where it is expressed to produce the encoded product.
  • This can be accomplished by any of numerous methods known in the art, e.g., by constructing it as part of an appropriate nucleic acid expression vector and administering it so that it becomes intracellular, e.g., by infection using a defective or attenuated retro viral or other viral vector (see
  • U.S. Patent No. 4,980,286) by direct injection of naked DNA; by use of microparticle bombardment (e.g., a gene gun; Biolistic, Dupont); by coating with lipids, cell-surface receptors or transfecting agents; by encapsulation in liposomes, microparticles or microcapsules; by administering it in linkage to a peptide which is known to enter the nucleus; or by administering it in linkage to a ligand subject to receptor-mediated endocytosis (see, e.g., Wu and Wu, 1987, J. Biol. Chem. 262:4429-4432), which can be used to target cell types specifically expressing the receptors.
  • a nucleic acid-ligand complex can be formed in which the ligand comprises a fusogenic viral peptide to disrupt endosomes, allowing the nucleic acid to avoid lysosomal degradation.
  • the nucleic acid can be targeted in vivo for cell specific uptake and expression, by targeting a specific receptor
  • nucleic acid can be introduced intracellularly and inco ⁇ orated within host cell DNA for expression, by homologous recombination (Koller and Smithies, 1989, Proc. Natl. Acad. Sci. USA 86:8932-8935; Zijlstra et al., 1989, Nature 342:435-438).
  • a viral vector that contains a nucleic acid encoding a VRPI is used.
  • a refroviral vector can be used (see Miller et al., 1993, Meth. Enzymol. 217:581-599). These refroviral vectors have been modified to delete refroviral sequences that are not necessary for packaging of the viral genome and integration into host cell DNA.
  • the nucleic acid encoding the VRPI to be used in gene therapy is cloned into the vector, which facilitates delivery of the gene into a subject. More detail about refroviral vectors can be found in Boesen et al., 1994,
  • Biotherapy 6:291-302 which describes the use of a refroviral vector to deliver the mdrl gene to hematopoietic stem cells in order to make the stem cells more resistant -o chemotherapy.
  • Other references illustrating the use of refroviral vectors in gene therapy are: Clowes et al., 1994, J. Clin. Invest. 93:644-651; Kiem et al., 1994, blood 83:1467-1473; Salmons and Gunzberg, 1993, Human Gene Therapy 4:129-141; and
  • Adenoviruses are other viral vectors that can be used in gene therapy. Adenoviruses are especially attractive vehicles for delivering genes to respiratory epithelia. Adenoviruses naturally infect respiratory epithelia where they cause a mild disease. Other targets for adenovirus-based delivery systems are liver, the central nervous system, endothelial cells, and muscle. Adenoviruses have the advantage of being capable of infecting non-dividing cells. Kozarsky and Wilson, 1993, Current Opinion in Genetics and Development 3:499-503 present a review of adenovirus-based gene therapy.
  • Adeno-associated virus has also been proposed for use in gene therapy (Walsh et al., 1993, Proc. Soc. Exp. Biol. Med. 204:289-300; U.S. Patent No. 5,436,146).
  • Another approach to gene therapy involves transferring a gene to cells in tissue culture by such methods as elecfroporation, lipofection, calcium phosphate mediated transfection, of viral infection.
  • the method of transfer includes the ttansfer of a selectable marker to the cells.
  • the cells are then placed under selection to isolate those cells that have taken up and are expressing the transferred gene. Those cells are then delivered to a subject.
  • the nucleic acid is introduced into a cell prior to adminisfration in vivo of the resulting recombinant cell.
  • introduction can be carried out by any method known in the art, including but not limited to transfection, elecfroporation, microinjection, infection with a viral or bacteriophage vector containing the nucleic acid sequences, cell fusion, chromosome-mediated gene fransfer, microcell-mediated gene fransfer, spheroplast fusion, etc.
  • Numerous techniques are known in the art for the introduction of foreign genes into cells (see, e.g., Loeffler andBehr, 1993, Meth. Enzymol. 217:599-618; Cohen et al., 1993, Meth.
  • the technique should provide for the stable transfer of the nucleic acid to the cell, so that the nucleic acid is expressible by the cell and preferably heritable and expressible by its cell progeny.
  • the resulting recombinant cells can be delivered to a subject by various methods known in the art.
  • epithelial cells are injected, e.g., subcutaneously.
  • recombinant skin cells may be applied as a skin graft onto the subject.
  • Recombinant blood cells e.g., hematopoietic stem or progenitor cells
  • the amount of cells envisioned for use depends on the desired effect, the condition of the subject, etc., and can be determined by one skilled in the art.
  • Cells into which a nucleic acid can be introduced for ptuposes of gene therapy encompass any desired, available cell type, and include but are not limited to neuronal cells, glial cells (e.g., oligodendrocytes or asfrocytes), epithelial cells, endothelial cells, keratinocytes, fibroblasts, muscle cells, hepatocytes; blood cells such as
  • T lymphocytes B lymphocytes, monocytes, macrophages, neutrophils, eosinophils, megakaryocytes, granulocytes; various stem or progenitor cells, in particular hematopoietic stem or progenitor cells, e.g., as obtained from bone marrow, umbilical cord blood, peripheral blood or fetal liver.
  • the cell used for gene therapy is autologous to the subject that is treated.
  • a nucleic acid encoding a VRPI is introduced into the cells such that it is expressible by the cells or their progeny, and the recombinant cells are then administered in vivo for therapeutic effect.
  • stem or progenitor cells are used. Any stem or progenitor cells which can be isolated and maintained in vitro can be used in accordance with this embodiment of the present invention (see e.g. PCT Publication WO 94/08598, dated April 28, 1994; Stemple and Anderson, 1992, Cell 71:973-985; Rheinwald, 1980, Meth. Cell Bio. 21 A:229; and Pittelkow and Scott, 1986, Mayo Clinic Proc. 61:771).
  • the nucleic acid to be introduced for pu ⁇ oses of gene therapy comprises an inducible promoter operably linked to the coding region, such that expression of the nucleic acid is controllable by controlling the presence or absence of the appropriate inducer of transcription.
  • Direct injection of a DNA coding for a VRPI may also be performed according to, for example, the techniques described in United States Patent No. 5,589,466. These techniques involve the inj ection of "naked DNA” , i. e. , isolated D A molecules in the absence of liposomes, cells, or any other material besides a suitable carrier.
  • the injection of DNA encoding a protein and operably linked to a suitable promoter results in the production of the protein in cells near the site of injection and the elicitation of an immune response in the subject to the protein encoded by the injected DNA.
  • naked DNA comprising (a) DNA encoding a VRPI and (b) a promoter are injected into a subject to elicit an immune response to the VRPI.
  • vascular response is treated or prevented by administration of a compound that antagonizes (inhibits) the level(s) and/or function(s) of one or more VRPIs which are elevated in the blood of subjects having vascular response as compared with blood of subjects free from vascular response.
  • Compounds useful for this piupose include but are not limited to anti-VRPI antibodies (and fragments and derivatives containing the binding region thereof), VRPI antisense or ribozyme nucleic acids, and nucleic acids encoding dysfunctional VRPIs that are used to "knockout" endogenous VRPI function by homologous recombination (see, e.g., Capecchi, 1989, Science 244:1288-1292).
  • Other compounds that inhibit VRPI funeuon can be identified by use of known in vitro assays, e.g., assays for the ability of a test compound to inhibit binding of a VRPI to another protein or a binding partner, or to inhibit a known VRPI function.
  • Such inhibition is assayed in vitro or in cell culture, but genetic assays may also be employed.
  • the Preferred Technology can also be used to detect levels of the VRPI before and after the adminisfration of the compound.
  • suitable in vitro or in vivo assays are utilized to determine the effect of a specific compound and whether its administration is indicated for treatment of the affected tissue, as described in more detail below.
  • a compound that inhibits a VRPI function is administered therapeutically or prophylactically to a subject in whom an increased blood level or functional activity of the VRPI (e.g., greater than the normal level or desired level) is detected as compared with blood of subjects free from vascular response or a predetermined reference range.
  • an increased blood level or functional activity of the VRPI e.g., greater than the normal level or desired level
  • Methods standard in the art can be employed to measure the increase in a VRPI level or function, as outlined above.
  • Preferred VRPI inhibitor compositions include small molecules, i.e., molecules of 1000 daltons or less. Such small molecules can be identified by the screening methods described herein.
  • VRPI expression is inhibited by use of VRPI antisense nucleic acids.
  • the present invention provides the therapeutic or prophylactic use of nucleic acids comprising at least six nucleotides that are antisense to a gene or cDNA encoding a VRPI or a portion thereof.
  • a VRPI "antisense" nucleic acid refers to a nucleic acid capable of hybridizing by virtue of some sequence complementarity to a portion of an RNA (preferably mRNA) encoding a VRPI.
  • the antisense nucleic acid may be complementary to a coding and/or noncoding region of an mRNA encoding a VRPI.
  • antisense nucleic acids have utility as compounds that inhibit VRPI expression, and can be used in the treatment or prevention of vascular response.
  • the antisense nucleic acids of the invention are double-stranded or single-stranded oligonucleotides, RNA or DNA or a modification or derivative thereof, and can be directly administered to a cell or produced intracellularly by transcription of exogenous, introduced sequences.
  • the invention further provides pharmaceutical compositions comprising an effective amount of the VRPI antisense nucleic acids of the invention in a pharmaceutically acceptable carrier, as described infra.
  • the invention provides methods for inhibiting the expression of a VRPI nucleic acid sequence in a prokaryotic or eukaryotic cell comprising providing the cell with an effective amount of a composition comprising a VRPI antisense nucleic acid of the invention.
  • VRPI antisense nucleic acids and their uses are described in detail below.
  • the VRPI antisense nucleic acids are of at least six nucleotides and are preferably oligonucleotides ranging from 6 to about 50 oligonucleotides.
  • the oligonucleotide is at least 10 nucleotides, at least 15 nucleotides, at least 100 nucleotides, or at least 200 nucleotides.
  • the oligonucleotides can be DNA or RNA or chimeric mixtures or derivatives or modified versions thereof and can be single- stranded or double-stranded.
  • the oligonucleotide can be modified at the base moiety, sugar moiety, or phosphate backbone.
  • the oligonucleotide may include other appended groups such as peptides; agents that facilitate transport across the cell membrane (see, e.g., Letsinger et al., 1989, Proc. Natl. Acad. Sci. USA 86:6553-6556; Lemaitre et al., 1987, Proc. Natl. Acad. Sci. 84:648-652; PCT Publication No. WO 88/09810, published December 15, 1988) or blood-brain barrier (see, e.g., PCT Publication No.
  • a VRPI antisense oligonucleotide is provided, preferably of single-stranded DNA.
  • the oligonucleotide may be modified at any position on its structure with substituents generally known in the art.
  • the VRPI antisense oligonucleotide may comprise at least one of the following modified base moieties: 5-fluorouracil, 5-bromouracil, 5-chlorouracil, 5-iodouracil, hypoxanthine, xantine, 4-acetylcytosine, 5-(carboxyhydroxylmethyl) uracil, 5-carboxymethylaminomethyl-2-thiouridine, 5-carboxymethylaminomethyluracil, dihydrouracil, beta-D-galactosylqueosine, inosine, N6-isopentenyladenine, 1-methylguanine, 1-methylinosine, 2,2-dimethylguanine, 2-methyladenine, 2-methylguanine, 3-methylcytosine, 5-methylcytosine, N6-adenine, 7-methylguanine, 5-methylaminomethyluracil, 5-methoxyaminomethyl-2-thiouracil, beta- D-mannosylqueosine, 5N
  • the oligonucleotide comprises at least one modified sugar moiety, e.g., one of the following sugar moieties: arabinose, 2-fluoroarabinose, xylulose, and hexose.
  • the oligonucleotide comprises at least one of the following modified phosphate backbones: a phosphorothioate, a phosphorodithioate, a phosphoramidothioate, a phosphoramidate, a phosphordiamidate, a methylphosphonate, an alkyl phosphotriester, a formacetal, or an analog of formacetal.
  • the oligonucleotide is an ⁇ -anomeric oligonucleotide.
  • An ⁇ -anomeric oligonucleotide forms specific double-stranded hybrids with complementary RNA in which, contrary to the usual ⁇ -units, the strands run parallel to each other (Gautier et al., 1987, Nucl. Acids Res. 15:6625-6641).
  • the oligonucleotide may be conjugated to another molecule, e.g., a peptide, hybridization triggered cross-linking agent, transport agent, or hybridization-triggered cleavage agent.
  • Oligonucleotides of the invention may be synthesized by standard methods known in the art, e.g., by use of an automated DNA synthesizer (such as are commercially available from Biosearch, Applied Biosystems, etc.).
  • an automated DNA synthesizer such as are commercially available from Biosearch, Applied Biosystems, etc.
  • phosphorothioate oligonucleotides may be synthesized by the method of Stein et al. (1988, Nucl. Acids Res. 16:3209), and methylphosphonate oligonucleotides can be prepared by use of controlled pore glass polymer supports (Sarin et al., 1988, Proc. Natl. Acad. Sci. USA 85:7448-7451).
  • the VRPI antisense nucleic acid of the invention is produced infracellularly by franscription from an exogenous sequence.
  • a vector can be infroduced in vivo such that it is taken up by a cell, within which cell the vector or a portion thereof is transcribed, producing an antisense nucleic acid (RNA) of the invention.
  • RNA antisense nucleic acid
  • Such a vector would contain a sequence encoding the VRPI antisense nucleic acid.
  • Such a vector can remain episomal or become chromosomally integrated, as long as it can be transcribed to produce the desired antisense RNA.
  • Such vectors can be constructed by recombinant DNA technology standard in the art.
  • Vectors can be plasmid, viral, or others known in the art, used for replication and expression in mammalian cells.
  • Expression of the sequence encoding the VRPI antisense RNA can be by any promoter known in the art to act in mammalian, preferably human, cells. Such promoters can be inducible or constitutive. Examples of such promoters are outlined above.
  • the antisense nucleic acids of the invention comprise a sequence complementary to at least a portion of an RNA transcript of a gene encoding a VRPI, preferably a human gene encoding a VRPI.
  • absolute complementarity although preferred, is not required.
  • a sequence "complementary to at least a portion of an RNA,” as referred to herein, means a sequence having sufficient complementarity to be able to hybridize under stringent conditions (e.g., highly stringent conditions comprising hybridization in 7% sodium dodecyl sulfate (SDS), 1 mM EDTA at 65°C and washing in
  • stringent conditions e.g., highly stringent conditions comprising hybridization in 7% sodium dodecyl sulfate (SDS), 1 mM EDTA at 65°C and washing in
  • VRPI antisense nucleic acids can be used to treat or prevent vascular response when the target VRPI is overexpressed in the blood of subjects suspected of having or suffering from vascular response.
  • a single-stranded DNA antisense VRPI oligonucleotide is used.
  • RNA types which express or overexpress RNA encoding a VRPI can be identified by various methods known in the art. Such cell types include but are not limited to leukocytes (e.g., neutrophils, macrophages, monocytes) and resident cells (e.g., asfrocytes, glial cells, neuronal cells, and ependymal cells). Such methods include, but are not limited to, hybridization with a VRPI-specific nucleic acid (e.g., by Northern hybridization,, dot blot hybridization, in situ hybridization), observing the ability of RNA from the cell type to be translated in vitro into a VRPI, immunoassay, etc.
  • leukocytes e.g., neutrophils, macrophages, monocytes
  • resident cells e.g., asfrocytes, glial cells, neuronal cells, and ependymal cells.
  • Such methods include, but are not limited to, hybridization with a VRPI-specific nu
  • primary tissue from a subject can be assayed for VRPI expression prior to treatment, e.g., by immunocytochemistry or in situ hybridization.
  • Pharmaceutical compositions of the invention comprising an effective amount of a VRPI antisense nucleic acid in a pharmaceutically acceptable carrier, can be administered to a subject having vascular response.
  • the amount of VRPI antisense nucleic acid which will be effective in the treatment of vascular response can be determined by standard clinical techniques.
  • compositions comprising one or more VRPI antisense nucleic acids are administered via liposomes, microparticles, or microcapsules.
  • such compositions may be used to achieve sustained release of the VRPI antisense nucleic acids.
  • symptoms of vascular response may be ameliorated by decreasing the level of a VRPI or VRPI activity by using gene sequences encoding the VRPI in conjunction with well-known gene "knock-out,” ribozyme or triple helix methods to decrease gene expression of a VRPI.
  • ribozyme or triple helix molecules are used to modulate the activity, expression or synthesis of the gene encoding the VRPI, and thus to ameliorate the symptoms of vascular response.
  • Such molecules may be designed to reduce or inhibit expression of a mutant or non-mutant target gene. Techniques for the production and use of such molecules are well knowr. to those of skill in the art.
  • Ribozyme molecules designed to catalytically cleave gene mRNA transcripts encoding a VRPI can be used to prevent translation of target gene mRNA and, therefore, expression of the gene product.
  • Ribozymes are enzymatic RNA molecules capable of catalyzing the specific cleavage of RNA. (For a review, see Rossi, 1994, Current Biology 4, 469-471). The mechanism of ribozyme action involves sequence specific hybridization of the ribozyme molecule to complementary target RNA, followed by an endonucleolytic cleavage event.
  • composition of ribozyme molecules must include one or more sequences complementary to the target gene mRNA, and must include the well known catalytic sequence responsible for mRNA cleavage. For this sequence, see, e.g., U.S. Patent No. 5,093,246, which is inco ⁇ orated herein by reference in its entirety.
  • ribozymes that cleave mRNA at site specific recognition sequences can be used to destroy mRNAs encoding a VRPI
  • the use of hammerhead ribozymes is preferred.
  • Hammerhead ribozymes cleave mRNAs at locations dictated by flanking regions that form complementary base pairs with the target mRNA. The sole requirement is that the target mRNA have the folio wing sequence of two bases: 5'-UG-3'.
  • the construction and production of hammerhead ribozymes is well known in the art and is_ described more fully in Myers, 1995, Molecular Biology and Biotechnology: A Comprehensive Desk Reference. VCH Publishers, New York, (see especially Figure 4, page 833) and in Haseloff and Gerlach, 1988, Nature, 334, 585-591, each of which is inco ⁇ orated herein by reference in its entirety.
  • the ribozyme is engineered so that the cleavage recognition site is located near the 5' end of the mRNA encoding the VRPI, i.e., to increase efficiency and minimize the intracellular accumulation of non-functional mRNA transcripts.
  • the ribozymes of the present invention also include RNA endoribonucleases (hereinafter "Cech-type ribozymes”) such as the one that occurs naturally in Tetrahymena thermophila (known as the TVS, or L-19 INS R ⁇ A) and that has been extensively described by Thomas Cech and collaborators (Zaug, et al., 1984, Science, 224, 574-578; Zaug and Cech, 1986, Science, 231, 470-475; Zaug, et al, 1986, Nature, 324, 429-433 ; published International patent application No. WO 88/04300 by
  • the Cech-type ribozymes have an eight base pair active site which hybridizes to a target RNA sequence whereafter cleavage of the target RNA takes place.
  • the invention encompasses those Cech-type ribozymes which target eight base-pair active site sequences that are present in the gene encoding the VRPI.
  • the ribozymes can be composed of modified oligonucleotides (e.g., for improved stability, targeting, etc.) and should be delivered to cells that express the VRPI in vivo.
  • a preferred method of delivery involves using a DNA construct "encoding" the ribozyme under the control of a strong constitutive pol III or pol II promoter, so that transfected cells will produce sufficient quantities of the ribozyme to destroy endogenous mRNA encoding the VRPI and inhibit franslation. Because ribozymes, unlike antisense molecules, are catalytic, a lower intracellular concentration is required for efficacy.
  • Endogenous VRPI expression can also be reduced by inactivating or "knocking out” the gene encoding the VRPI, or the promoter of such a gene, using targeted homologous recombination (e.g., see Smithies, et al., 1985, Nature 317:230-234; Thomas and Capecchi, 1987, Cell 51:503-512; Thompson et al, 1989, Cell 5:313-321; and Zijlstra et al., 1989, Nature 342:435-438, each of which is inco ⁇ orated by reference herein in its entirety).
  • targeted homologous recombination e.g., see Smithies, et al., 1985, Nature 317:230-234; Thomas and Capecchi, 1987, Cell 51:503-512; Thompson et al, 1989, Cell 5:313-321; and Zijlstra et al., 1989, Nature 342:435-438, each of which is inco ⁇ orated by reference herein in its entirety).
  • a mutant gene encoding a nonfunctional VRPI (or a completely unrelated DNA sequence) flanked by DNA homologous to the endogenous gene (either the coding regions or regulatory regions of the gene encoding the VRPI) can be used, with or without a selectable marker and/or a negative selectable marker, to fransfect cells that express the target gene in vivo. Insertion of the DNA construct, via targeted homologous recombination, results in inactivation of the target gene.
  • Such approaches are particularly suited in the agricultural field where modifications to ES (embryonic stem) cells can be used to generate animal offspring with an inactive target gene (e.g., see Thomas and Capecchi, 1987 and Thompson, 1989, supra).
  • the endogenous expression of a gene encoding a VRPI can be reduced by targeting deoxyribonucleotide sequences complementary to the regulatory region of the gene (i.e., the gene promoter and/or enhancers) to form triple helical structures that prevent transcription of the gene encoding the VRPI in target cells in the body.
  • deoxyribonucleotide sequences complementary to the regulatory region of the gene i.e., the gene promoter and/or enhancers
  • Nucleic acid molecules to be used in triplex helix formation for the inhibition of transcription should be single stranded and composed of deoxynucleotides.
  • the base composition of these oligonucleotides must be designed to promote triple helix formation via Hoogsteen base pairing rules, which generally require sizeable stretches of either purines or pyrimidines to be present on one strand of a duplex.
  • Nucleotide sequences may be pyrimidine-based, which will result in TAT and CGC + triplets across the three associated strands of the resulting triple helix.
  • the pyrimidine-rich molecules provide base complementarity to a purine-rich region of a single strand of the duplex in a parallel orientation to that strand.
  • nucleic acid molecules may be chosen that are purine-rich, for example, contain a stretch of G residues. These molecules will form a triple helix with a DNA duplex that is rich in GC pairs, in which the majority of the purine residues are located on a single strand of the targeted , duplex, resulting in GGC triplets across the three strands in the triplex.
  • the potential sequences that can be targeted for triple helix formation may be increased by creating a so called “switchback" nucleic acid molecule.
  • Switchback molecules are synthesized in an alternating 5'-3', 3'-5' manner, such that they base pair with first one strand of a duplex and then the other, eliminating the necessity for a sizeable stretch of either purines or pyrimidines to be present on one strand of a duplex.
  • a VRPI may so efficiently reduce or inhibit the transcription (triple helix) or translation (antisense, ribozyme) of mRNA produced by normal gene alleles of a VRPI that the situation may arise wherein the concentration of VRPI present may be lower than is necessary for a normal phenotype.
  • gene therapy may be used to introduce into cells nucleic acid molecules that encode and express the VRPI that exhibit normal gene activity and that do not contain sequences susceptible to whatever antisense, ribozyme, or triple helix treatments are being utilized.
  • normal VRPI can be co- administered in order to maintain the requisite level of VRPI activity.
  • Antisense RNA and DNA, ribozyme, and triple helix molecules of the invention may be prepared by any method known in the art for the synthesis of DNA and RNA molecules, as discussed above. These include techniques for chemically synthesizing oligodeoxyribonucleotides and oligoribonucleotides well known in the art such as for example solid phase phosphoramidite chemical synthesis.
  • RNA molecules may be generated by in vitro and in vivo franscription of DNA sequences • encoding the antisense RNA molecule. Such DNA sequences may be inco ⁇ orated into a wide variety of vectors that inco ⁇ orate suitable RNA polymerase promoters such as the T7 or SP6 polymerase promoters.
  • antisense cDNA constructs that synthesize antisense RNA constitutively or inducibly, depending on the promoter used, can be infroduced stably into cell lines.
  • the present invention also provides assays for use in drug discovery in order to identify or verify the efficacy of compounds for treatment or prevention of vascular response.
  • Test compounds can be assayed for their ability to restore VRF or VRPI levels in a subject having vascular response towards levels found in subjects free from vascular response or to produce similar changes in experimental animal models of vascular response.
  • Compounds able to restore VRF or VRPI levels in a subject having vascular response towards levels found in subjects free from vascular response or to produce similar changes in experimental animal models of vascular response can be used as lead compounds for further drug discovery, or used therapeutically.
  • VRF and VRPI expression can be assayed by the Preferred Technology, immunoassays, gel electrophoresis followed by visualization, detection of VRPI activity, or any other method taught herein or known to those skilled in the art.
  • Such assays can be used to screen candidate drugs, in clinical monitoring or in drug development, where abundance of a VRF or VRPI can serve as a surrogate marker for clinical disease.
  • in vitro assays can be carried out with cells representative of cell types involved in a subject's disorder, to determine if a compound has a desired effect upon such cell types.
  • fransgenic animals can be produced with "knockout” mutations of the gene or genes encoding one or more VRPIs.
  • a "knock-out" mutation of a gene is a mutation that causes the mutated gene to not be expressed, or expressed in an aberrant form or at a low level, such that the activity associated with the gene product is nearly or entirely absent.
  • the fransgenic animal is a mammal, more preferably, the fransgenic animal is a mouse.
  • test compounds that modulate the expression of a VRPI are identified in non-human animals (e.g., mice, rats, monkeys, rabbits, and guinea pigs), preferably non-human animal models for vascular response, expressing the VRPI.
  • non-human animals e.g., mice, rats, monkeys, rabbits, and guinea pigs
  • a test compound or a confrol compound is administered to the animals, and the effect of the test compound on expression of one or more VRPIs is determined.
  • a test compound that alters the expression of a VRPI can be identified by comparing the level of the selected VRPI or VRPIs (or mRNA(s) encoding the same) in an animal or group of animals treated with a test compound with the level of the VRPI(s) or mRNA(s) in an untreated animal or group of animals or an animal or group of animals treated with a control compound.
  • Techniques known to those of skill in the art can be used to determine the mRNA and protein levels, for example, in situ hybridization. The animals may or may not be sacrificed to assay the effects of a test compound.
  • test compounds that modulate the activity of a VRPI or a biologically active portion thereof are identified in non-human animals (e.g., mice, rats, monkeys, rabbits, and guinea pigs), preferably non-human animal models for vascular response, expressing the VRPI.
  • a test compound or a confrol compound is admimstered to the animals, and the effect of a test compound on the activity of a VRPI is determined.
  • a test compound that alters the activity of a VRPI can be identified by assaying animals treated with a control compound and animals treated with the test compound.
  • the activity of the VRPI can be assessed by detecting induction of a cellular second messenger of the VRPI (e.g., intracellular Ca2+, diacylglycerol, IP3, etc.), detecting catalytic or enzymatic activity of the VRPI or binding partner thereof, detecting the induction of a reporter gene (e.g., a regulatory element that is responsive to a VRPI of the invention operably linked to a nucleic acid encoding a detectable marker, such as luciferase or green fluorescent protein), or detecting a cellular response (e.g., cellular differentiation or cell proliferation).
  • a reporter gene e.g., a regulatory element that is responsive to a VRPI of the invention operably linked to a nucleic acid encoding a detectable marker, such as luciferase or green fluorescent protein
  • a cellular response e.g., cellular differentiation or cell proliferation.
  • test compounds that modulate the level or expression of a VRPI are identified in human subjects having vascular response, preferably those having vascular response and most preferably those having severe vascular response.
  • a test compound or a control compound is administered to the human subject, and the effect of a test compound on VRPI expression is determined by analyzing the expression of the VRPI or the mRNA encoding the same in a biological sample (e.g., blood, serum, plasma, or urine).
  • a test compound that alters the expression of a VRPI can be identified by comparing the level of the VRPI or mRNA encoding the same in a subject or group of subjects treated with a control compound to that in a subject or group of subjects treated with a test compound.
  • alterations in the expression of a VRPI can be identified by comparing the level of the VRPI or mRNA encoding the same in a subject or group of subjects before and after the adminisfration of a test compound.
  • Techniques known to those of skill in the art can be used to obtain the biological sample and analyze the mRNA or protein expression. For example, the Preferred Technology described herein can be used to assess changes in the level of a VRPI.
  • test compounds that modulate the activity of a VRPI are identified in human subjects having vascular response, preferably those having vascular response and most preferably those with severe vascular response.
  • a test compound or a control compound is administered to the human subject, and the effect of a test compound on the activity of a VRPI is determined.
  • a test compound that alters the activity of a VRPI can be identified by comparing biological samples from subjects treated with a confrol compound to samples from subjects treated with the test compound.
  • alterations in the activity of a VRPI can be identified by comparing the activity of a VRPI in a subject or group of subjects before and after the adminisfration of a test compound.
  • the activity of the VRPI can be assessed by detecting in a biological sample (e.g., blood, serum, plasma, or urine) induction of a cellular signal fransduction pathway of the VRPI (e.g., intracellular Ca2+, diacylglycerol, IP3, etc.), catalytic or enzymatic activity of the VRPI or a binding partner thereof, or a cellular response, for example, cellular differentiation, or cell proliferation.
  • a biological sample e.g., blood, serum, plasma, or urine
  • a cellular signal fransduction pathway of the VRPI e.g., intracellular Ca2+, diacylglycerol, IP3, etc.
  • catalytic or enzymatic activity of the VRPI or a binding partner thereof e.g., intracellular Ca2+, diacylglycerol, IP3, etc.
  • a cellular response for example, cellular differentiation, or cell proliferation.
  • Techniques known to those of skill in the art can be used to detect changes in
  • a test compound that changes the level or expression of a VRPI towards levels detected in control subjects is selected for further testing or therapeutic use.
  • a test compound that changes the activity of a VRPI towards the activity found in control subjects is selected for further testing or therapeutic use.
  • test compounds that reduce the severity of one or more symptoms associated with vascular response are identified in human subjects having vascular response, preferably subjects having vascular response and most preferably subjects with severe vascular response.
  • a test compound or a control compound is administered to the subjects, and the effect of a test compound on one or more symptoms of vascular response is determined.
  • a test compound that reduces one or more symptoms can be identified by comparing the subjects treated with a control compound to the subjects treated with the test compound. Techniques known to physicians familiar with vascular response can be used to determine whether a test compound reduces one or more symptoms associated with vascular response. For example, a test compound that reduces aetherosclerosisor vasculitis in a subject having vascular response will be beneficial for treating subjects having vascular response.
  • a test compound that reduces the severity of one or more symptoms associated with vascular response in a human having vascular response is selected for further testing or therapeutic use.
  • the invention provides methods of treatment (and prophylaxis) comprising administering to a subject an effective amount of a compound of the invention.
  • the compound is substantially purified (e.g., substantially free from substances that limit its effect or produce undesired side-effects).
  • the subject is preferably an animal, including but not limited to animals such as cows, pigs, horses, chickens, cats, dogs, etc., and is preferably a mammal, and most preferably human. In a specific embodiment, anon-human mammal is the subject.
  • Formulations and methods of adminisfration that can be employed when the compound comprises a nucleic acid are described above; additional appropriate formulations and routes of administration are described below.
  • a compound of the invention e.g., encapsulation in liposomes, microparticles, microcapsules, recombinant cells capable of expressing the compound, receptor-mediated endocytosis (see, e.g., Wu and Wu, 1987, J. Biol. Chem. 262:4429-4432), construction of a nucleic acid as part of a refroviral or other vector, etc.
  • Methods of introduction can be enteral or parenteral and include but are not limited to intradermal, intramuscular, infraperitoneal, intravenous, subcutaneous, intranasal, epidural, and oral routes.
  • the compounds may be admimstered by any convenient route, for example by infusion or bolus injection, by abso ⁇ tion through epithelial or mucocutaneous linings (e.g., oral mucosa, rectal and intestinal mucosa, etc.) and may be administered together with other biologically active agents. Administration can be systemic or local.
  • Pulmonary administration can also be employed, e.g., by use of an inhaler or nebulizer, and formulation with an aerosolizing agent.
  • compositions of the invention may be desirable to administer locally to the area in need of treatment; this may be achieved, for example, and not by way of limitation, by local infusion during surgery, topical application, e.g., by injection, by means of a catheter, or by means of an implant, said implant being of a porous, non-porous, or gelatinous material, including membranes, such as sialastic membranes, or fibers.
  • administration can be by direct injection into blood or at the site (or former site) of vascular response.
  • the compound in another embodiment, can be delivered in a vesicle, in particular a liposome (see Langer, 1990, Science 249:1527-1533; Treat et al., in Liposomes in the Therapy of Infectious Disease and Cancer, Lopez-Berestein and Fidler (eds.), Liss, New York, pp. 353-365 (1989); Lopez-Berestein, ibid., pp. 317-327; see generally ibid.)
  • the compound can be delivered in a controlled release system.
  • a pump may be used (see Langer, supra; Sefton, 1987, CRC Crit. Ref. Biomed. Eng. 14:201 ; Buchwald et al., 1980, Surgery 88:507; Saudek et al., 1989, N. Engl. J. Med. 321:574).
  • polymeric materials can be used (see Medical Applications of Controlled Release, Langer and Wise (eds.), CRC Pres., Boca Raton, Florida (1974); Controlled Drug Bioavailability, Drug Product Design and Performance, Smolen and Ball (eds.), Wiley, New York (1984); Ranger and Peppas, J., 1983, Macromol. Sci. Rev. Macromol. Chem. 23:61; see also Levy et al., 1985, Science 228:190; During et al., 1989, A n. Neurol. 25:351; Howard et al., 1989, J. Neurosurg. 71:105 ).
  • a controlled release system can be placed in proximity of the therapeutic target, e.g., the endothelial cells lining the blood vessels, thus requiring only a fraction of the systemic dose (see, e.g., Goodson, in Medical Applications of Controlled Release, supra, vol. 2, pp. 115-138 (1984)).
  • the nucleic acid can be administered in vivo to promote expression of its encoded protein, by constructing it as part of an appropriate nucleic acid expression vector and administering it so that it becomes intracellular, e.g., by use of a refroviral vector (see U.S. Patent No.
  • anucleic acid can be introduced intracellularly and inco ⁇ orated within host cell DNA for expression, by homologous recombination.
  • compositions comprise a therapeutically effective amount of a compound, and a pharmaceutically acceptable carrier.
  • pharmaceutically acceptable means approved by a regulatory agency of the Federal or a state government or listed in the U.S. Pharmacopeia or other generally recognized pharmacopeia for use in animals, and more particularly in humans.
  • carrier refers to a diluent, adjuvant, excipient, or vehicle with which the therapeutic is administered.
  • Such pharmaceutical carriers can be sterile liquids, such as water and oils, including those of petroleum, animal, vegetable or synthetic origin, such as peanut oil, soybean oil, mineral oil, sesame oil and the like.
  • Water is a preferred carrier when the pharmaceutical composition is administered intravenously.
  • Saline solutions and aqueous dextrose and glycerol solutions can also be employed as liquid carriers, particularly for injectable solutions.
  • Suitable pharmaceutical excipients include starch, glucose, lactose, sucrose, gelatin, malt, rice, flour, chalk, silica gel, sodium stearate, glycerol monostearate, talc, sodium chloride, dried skim milk, glycerol, propylene, glycol, water, ethanol and the like.
  • the composition if desired, can also contain minor amounts of wetting or emulsifying agents, or pH buffering agents.
  • compositions can take the form of solutions, suspensions, emulsion, tablets, pills, capsules, powders, sustained-release formulations and the like.
  • the composition can be formulated as a suppository, with traditional binders and carriers such as triglycerides.
  • Oral formulation can include standard carriers such as pharmaceutical grades of mannitol, lactose, starch, magnesium stearate, sodium saccharine, cellulose, magnesium carbonate, etc. Examples of suitable pharmaceutical carriers are described in "Remington's Pharmaceutical Sciences" by E.W. Martin.
  • Such compositions will contain a therapeutically effective amount of the compound, preferably in purified form, together with a suitable amount of carrier so as to provide the form for proper adminisfration to the subject.
  • the formulation should suit the mode of administration.
  • the composition is formulated in accordance with routine procedures as a pharmaceutical composition adapted for intravenous administration to human beings.
  • compositions for intravenous administration are solutions in sterile isotonic aqueous buffer.
  • the composition may also include a solubilizing agent and a local anesthetic such as lidocaine to ease pain at the site of the injection.
  • the ingredients are supplied either separately or mixed together in unit dosage form, for example, as a dry lyophilized powder or water free concentrate in a hermetically sealed container such as an ampoule or sachette indicating the quantity of active agent.
  • composition is to be administered by infusion, it can be dispensed with an infusion bottle containing sterile pharmaceutical grade water or saline.
  • an ampoule of sterile water for injection or saline can be provided so that the ingredients may be mixed prior to administration.
  • the compounds of the invention can be formulated as neutral or salt forms.
  • Pharmaceutically acceptable salts include those formed with free amino groups such as those derived from hydrochloric, phosphoric, acetic, oxalic, tartaric acids, etc., and those formed with free carboxyl groups such as those derived from sodium, potassium, ammonium, calcium, ferric hydroxides, isopropylamine, triethylamine, 2-ethylamino ethanol, histidine, procaine, etc.
  • the amount of the compound of the invention which will be effective in the treatment of vascular response can be determined by standard clinical techniques.
  • in vitro assays may optionally be employed to help identify optimal dosage ranges.
  • the precise dose to be employed in the formulation will also depend on the route of adminisfration, and the seriousness of the disease or disorder, and should be decided according to the judgment of the practitioner and each subject's circumstances.
  • suitable dosage ranges for intravenous administration are generally about 20-500 micrograms of active compound per kilogram body weight.
  • suitable dosage ranges for intranasal adminisfration are generally about 0.01 pg/kg body weight to 1 mg/kg body weight.
  • Effective doses may be extrapolated from dose-response curves derived from in vitro or animal model test systems.
  • Suppositories generally contain active ingredient in the range of 0.5% to 10% by ' weight; oral formulations preferably contain 10% to 95% active ingredient.
  • the invention also provides a pharmaceutical pack or kit comprising one or more containers filled with one or more of the ingredients of the pharmaceutical compositions of the invention.
  • a pharmaceutical pack or kit comprising one or more containers filled with one or more of the ingredients of the pharmaceutical compositions of the invention.
  • Optionally associated with such containers can be a notice in the form prescribed by a governmental agency regulating the manufacture, use or sale of pharmaceuticals or biological products, which notice reflects (a) approval by the agency of manufacture, use or sale for human administration, (b) directions for use, or both.
  • vasculitis inflammation and necrosis of the blood vessels
  • vasculitis inflammation and necrosis of the blood vessels
  • there are few reliable diagnostic tests for vasculitis particularly ones that reliably diagnose such vascular damage at its earliest onset while it is still easily reversible.
  • a protein assay (Pierce BCA Cat # 23225) was performed on each serum sample as received. Prior to protein separation, each sample was processed for selective depletion of certain proteins, in order to enhance and simplify protein separation and facilitate analysis by removing proteins that may interfere with or limit analysis of proteins of interest. See International Patent Application No. PCT/GB99/01742, filed June 1, 1999, which is inco ⁇ orated by reference in its entirety, with particular reference to the experimental protocol.
  • the chromatographic procedure was automated using an Akta Fast Protein Liquid Chromatography (FPLC) System such that a series of up to seven runs could be performed sequentially.
  • the samples were passed through the series of 3 Hi-Trap columns in which the affinity chromatography media selectively bind the above proteins thereby removing them from the sample.
  • Fractions typically 3 ml per tube
  • Flowthrough fractions were collected of unbound material (“Flowthrough fractions") that eluted through the column during column loading and washing stages and of bound proteins
  • a volume of depleted blood containing approximately 300 ⁇ g of total protein was aliquoted and an equal volume of 1,0% (w/v) SDS (Fluka 71729), 2.3% (w/v) dithiothreitol (BDH 443852A) was added.
  • the sample was heated at 95°C for 5 mins, and then allowed to cool to 20°C. 125 ⁇ l of the following buffer was then added to the sample:
  • Isoelectric focusing was performed using the Immobiline7 DryStrip Kit (Pharmacia BioTech), following the procedure described in the manufacturer's instructions, see Instructions for Immobiline7 DryStrip Kit, Pharmacia, # 18-1038-63, Edition AB (inco ⁇ orated herein by reference in its entirety).
  • Immobilized pH was performed using the Immobiline7 DryStrip Kit (Pharmacia BioTech), following the procedure described in the manufacturer's instructions, see Instructions for Immobiline7 DryStrip Kit, Pharmacia, # 18-1038-63, Edition AB (inco ⁇ orated herein by reference in its entirety).
  • IPG strips (18cm, pH 3-10 non-linear strips; Pharmacia Cat. # 17-1235-01) were rehydrated overnight at 20°C in a solution of 8M urea, 2% (w/v) CHAPS, lOmM DTT, 2% (v/v) Resolytes 3.5-10, as described in the Immobiline DryStrip Users Manual.
  • IEF 50ml of supernatant (prepared as above) was loaded onto a strip, with the cup-loading units being placed at the basic end of the strip. The loaded gels were then covered with mineral oil (Pharmacia 17-3335-01) and a voltage was immediately applied to the strips according to the following profile, using a Pharmacia EPS3500XL power supply (Cat 19-3500-01):
  • the current limit was set to 10mA for 12 gels, and the wattage limit to 5W.
  • the temperature was held at 20°C throughout the run.
  • the strips were immediately removed and immersed for 10 mins at 20°C in a first solution of the following composition: 6M urea; 2% (w/v) DTT; 2% (w/v) SDS; 30% (v/v) glycerol (Fluka 49767); 0.05M Tris HCl, pH 6.8 (Sigma Cat T-1503).
  • the strips were removed from the first solution and immersed for 10 mins at 20°C in a second solution of the following composition: 6M urea; 2% (w/v) iodoacetamide (Sigma 1-6125); 2% (w/v) SDS; 30% (v/v) glycerol; 0.05M Tris/HCl, pH 6.8.
  • the dried plates were assembled into a casting box with a capacity of 13 gel sandwiches.
  • the top and bottom plates of each sandwich were spaced by means of lmm thick spacers, 2.5 cm wide.
  • the sandwiches were interleaved with acetate sheets to facilitate separation of the sandwiches after gel polymerization. Casting was then carried out according to Hochstrasser et al., op. cit.
  • a 9-16% linear polyacrylamide gradient was cast, extending up to a point 2cm below the level of the notch in the front plate, using the Angelique gradient casting system (Large Scale Biology).
  • Stock solutions were as follows. Acrylamide (40% in water) was from Serva (Cat. # 10677).
  • the cross-linking agent was PDA (BioRad 161-0202), at a concentration of 2.6% (w/w) of the total starting monomer content.
  • the gel buffer was 0.375M Tris/HCl, pH 8.8.
  • the polymerization catalyst was 0.05% (v/v) TEMED (BioRad 161-0801), and the initiator was 0.1% (w/v) APS (BioRad 161-0700). No SDS was included in the gel and no stacking gel was used.
  • the cast gels were allowed to polymerize at 20°C overnight, and then stored at 4°C in sealed polyethylene bags with 6ml of gel buffer, and were used within 4 weeks.
  • the gels were placed in the 2 nd D running tank, as described by Amess et al., 1995, Electrophoresis 16: 1255-1267 (inco ⁇ orated herein by reference in its entirety).
  • the tank was filled with running buffer (as above) until the level of the buffer was just higher than the top of the region of the 2 nd D gels which contained polyacrylamide, so as to achieve efficient cooling of the active gel area.
  • Running buffer was added to the top buffer compartments formed by the gels, and then voltage was applied immediately to the gels using a Consort E-833 power supply. For 1 hour, the gels were run at 20mA/gel.
  • the wattage limit was set to 150W for a tank containing 6 gels, and the voltage limit was set to 600V.
  • the gels were then run at 40mA/gel, with the same voltage and wattage limits as before, until the bromophenol blue line was 0.5cm from the bottom of the gel.
  • the temperature of the buffer was held at 16°C throughout the run. Gels were not run in duplicate.
  • the priming solution was then drained, and the gels were stained by complete immersion for 4 hours in a staining solution of Pyridinium, 4-[2-[4-(dipentylamino)-2-trifluoromethylphenyl] ethenyl]-l- (sulfobutyl)-, inner salt, prepared by diluting a stock solution of this dye (2mg/ml in DMSO) in 7.5% (v/v) aqueous acetic acid to give a final concentration of 1.2 mg/1; the staining solution was vacuum filtered through a 0.4 ⁇ m filter (Duropore) before use.
  • a staining solution of Pyridinium, 4-[2-[4-(dipentylamino)-2-trifluoromethylphenyl] ethenyl]-l- (sulfobutyl)-, inner salt prepared by diluting a stock solution of this dye (2mg/ml in DMSO) in 7.5% (v/v)
  • the gels were removed from the stain, rinsed with water and allowed to air dry briefly, and imaged on the Apollo 2. After imaging, the gels were sealed in polyethylene bags containing a small volume of staining solution, and then stored at 4°C.
  • the output from the scanner was first processed using the MELANIE7 II 2D PAGE analysis program (Release 2.2, 1997, BioRad Laboratories, Hercules, California, Cat. # 170-7566) to autodetect the registration points, Ml, M2, M3 and M4; to autocrop the images (i.e., to eliminate signals originating from areas of the scanned image lying outside the boundaries of the gel, e.g. the reference frame); to filter out artifacts due to dust; to detect and quantify features; and to create image files in GIF format.
  • Landmark identification was used to determine the pl and MW of features detected in the images. Thirteen landmark features, designated FI to F13, were identified in a standard blood image obtained from a pooled sample. These landmark features are identified in Figure 2 and were assigned the pl and/or MW values identified in Table
  • Images were edited to remove gross artifacts such as dust, to reject images which had gross abnormalities such as smearing of protein features, or were of too low a loading or overall image intensity to allow identification of more than the most intense features, or were of too poor a resolution to allow accurate detection of features. Images were then compared by pairing with one common image from the whole sample set. This common image, the "primary master image", was selected on the basis of protein load (maximum load consistent with maximum feature detection), and general image quality. Additionally, the primary master image was chosen to be an image which appeared to be generally representative of all those to be included in the analysis.
  • Each of the remaining study gel images was individually matched to the primary master image such that common protein features were paired between the primary master image and each individual study gel image as described below.
  • each study gel was adjusted for maximum alignment between its pattern of protein features, and that of the primary master, as follows.
  • Each of the study gel images was individually transformed into the geometry of the primary master image using a multi-resolution wa ⁇ ing procedure. This procedure corrects the image geometry for the distortions brought about by small changes in the physical parameters of the electrophoresis separation process from one sample to another. The observed changes are such that the distortions found are not simple geometric distortions, but rather a smooth flow, with variations at both local and global scale.
  • the fundamental principle in multi-resolution modeling is that smooth signals may be modeled as an evolution through 'scale space', in which details at successively finer scales are added to a low resolution approximation to obtain the high resolution signal.
  • This type of model is applied to the flow field of vectors (defined at each pixel position on the reference image) and allows flows of arbitrary smoothness to be modeled with relatively few degrees of freedom.
  • Each image is first reduced to a stack, or pyramid, of images derived from the initial image, but smoothed and reduced in resolution by a factor of 2 in each direction at every level (Gaussian pyramid) and a corresponding difference image is also computed at each level, representing the difference between the smoothed image and its progenitor (Laplacian pyramid).
  • the Laplacian images represent the details in the image at different scales.
  • the wa ⁇ ing process brought about good alignment between the common features in the primary master image, and the images for the other samples.
  • the MELANIE7 II 2D PAGE analysis program was used to calculate and record approximately 500-700 matched feature pairs between the primary master and each of the other images.
  • the accuracy of this program was significantly enhanced by the alignment of the images in the manner described above.
  • all pairings were finally examined by eye in the MelView interactive editing program and residual recognizably incorrect pairings were removed. Where the number of such recognizably incorrect pairings exceeded the overall reproducibility of the Preferred Technology (as measured by repeat analysis of the same biological sample) the gel selected to be the primary master gel was judged to be insufficiently representative of the study gels to serve as a primary master gel. In that case, the gel chosen as the primary master gel was rejected, and different gel was selected as the primary master gel, and the process was repeated.
  • a composite master image was thus generated by initializing the primary master image with its feature descriptors. As each image was transformed into the primary master geometry, it was digitally summed pixel by pixel into the composite master image, and the features that had not been paired by the procedure outlined above were likewise added to the composite master image description, with their centroids adjusted to the master geometry using the flow field correction.
  • MCI molecular cluster index
  • An MCI identifies a set of matched features on different images.
  • an MCI represents a protein or proteins eluting at equivalent positions in the 2D separation in different samples.
  • LIMS Laboratory Information Management System
  • Comparisons were made between samples taken from control subjects and samples taken from subjects having vascular response induced by SKF-95654 treatment for 1 hour, 2 hours, 4 hours and 24 hours.
  • the statistical strategies specified used to identify VRFs from the MCIs within the mastergroup is based on qualitative presence or absence alone. Using this procedure, a percentage feature presence was calculated across the confrol samples and vascular response samples for each MCI which was a potential VRF based on such qualitative - criteria alone, i.e. presence or absence. Feature Presence Threshold Percentage values of 66 or 66 (MCI present in either 66 % of foreground or background samples), and 100 or 100 (MCI present in either 100 % of foreground or background samples) were separately applied together with a 98 % confidence limit. The MCIs which recorded a percentage feature presence of 98% or more on vascular response samples and a percentage feature presence of 2% or less on control samples, were selected as the qualitative differential VRFs with 98% selectivity.
  • MCIs with significant fold changes were selected for each of the MCIs chosen in the first instance by feature presence.
  • a second selection strategy was based on the fold change.
  • a 95% confidence limit for the mean of the fold changes was calculated.
  • the MCIs with fold changes which fall outside the confidence limit were selected as CRFs which met the criteria of the significant fold change threshold with 95% selectivity. Because the MCI fold changes are based on a 95% confidence limit, it follows that the significant fold change threshold is itself 95%.
  • a parametric test T-test was applied. This test was performed between the control and the treated samples for each MCI. The MCIs which recorded a p-value less than or equal to 0.05 were selected as statistically significant CRFs with 95% selectivity.
  • the MCIs which recorded a p-value less than or equal to 0.01 were selected as statistically significant CRFs with 99% selectivity.
  • the MCIs which recorded a p-value less than or equal to 0.001 were selected as statistically significant CRFs with 99.9% selectivity.
  • Tryptic peptides were analyzed by mass spectrometry using a PerSeptive Biosystems Voyager- DETM STR Matrix-Assisted Laser Deso ⁇ tion Ionization Time- of-Flight (MALDI-TOF) mass spectrometer, and selected tryptic peptides were analyzed by tandem mass spectrometry (MS/MS) using a Micromass Quadrupole Time-of-Flight (Q-TOF) mass spectrometer (Micromass, Altrincham, U.K.) equipped with a nanoflowTM elecfrospray Z-spray source.
  • MALDI-TOF PerSeptive Biosystems Voyager- DETM STR Matrix-Assisted Laser Deso ⁇ tion Ionization Time- of-Flight
  • MS/MS tandem mass spectrometry
  • Q-TOF Micromass Quadrupole Time-of-Flight
  • the database searched was database constructed of protein entries in the non-redundant database held by the National Centre for Biotechnology Information (NCBI) which is accessible at http://www.ncbi.nhn.nih. ov/.
  • NCBI National Centre for Biotechnology Information
  • masses detected in MALDI-TOF mass specfra were assigned to tryptic digest peptides within the proteins identified.
  • tandem mass spectra of the peptides were inte ⁇ reted manually, using methods known in the art. (In the case of inte ⁇ retation of low-energy fragmentation mass spectra of peptide ions see Gaskell et al., 1992, Rapid Commun. Mass Spectrom. 6:658-662)
  • Table X lists the VRFs that were differentially present in SKF-95654 (SKF) treated subjects versus control/non-treated subjects. The fold change observed over 1, 2, 4 and 24 hours is shown. The first half of the table lists VRFs that were decreased, and the second half lists VRFs that were increased, upon SKF treatment.

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Abstract

L'invention concerne des procédés et des compositions pour le criblage, le diagnostic et le pronostic de la réponse vasculaire, pour le contrôle de l'efficacité du traitement de la réponse vasculaire, pour l'identification des patients les plus susceptibles de répondre à un traitement thérapeutique ou pour la mise au point de médicaments. L'invention porte, notamment, sur le criblage de candidats-médicaments pour l'évaluation de leur capacité à induire une réponse vasculaire. Les caractéristiques associées à la réponse vasculaire (VRF), détectables par électrophorèse bidimensionnelle du sang, du sérum ou du plasma sont décrites. L'invention se rapporte encore à des isoformes protéiques (VRPI) associées à la réponse vasculaire, détectables dans le sang, le sérum ou le plasma, à des préparations comprenant des VRPI isolées, à des anticorps pour les VRPI et à des kits contenant lesdites compositions.
EP01272729A 2000-12-29 2001-12-24 Proteines, genes et leur utilisation pour le diagnostic et le traitement de la reponse vasculaire Withdrawn EP1368647A2 (fr)

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PCT/GB2001/005774 WO2002054080A2 (fr) 2000-12-29 2001-12-24 Proteines, genes et leur utilisation pour le diagnostic et le traitement de la reponse vasculaire

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RU2006122946A (ru) * 2003-11-28 2008-01-10 Астразенека Аб (Se) Антитела
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GB9805477D0 (en) * 1998-03-13 1998-05-13 Oxford Glycosciences Limited Methods and compositions for diagnosis of rheumatoid arthritis
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