EP1248631A1 - Methodes d'inhibition/traitement d'infections par le vih et de symptomes lies au sida - Google Patents

Methodes d'inhibition/traitement d'infections par le vih et de symptomes lies au sida

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Publication number
EP1248631A1
EP1248631A1 EP01901750A EP01901750A EP1248631A1 EP 1248631 A1 EP1248631 A1 EP 1248631A1 EP 01901750 A EP01901750 A EP 01901750A EP 01901750 A EP01901750 A EP 01901750A EP 1248631 A1 EP1248631 A1 EP 1248631A1
Authority
EP
European Patent Office
Prior art keywords
hiv
composition according
present
compound
cells
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Withdrawn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
EP01901750A
Other languages
German (de)
English (en)
Other versions
EP1248631A4 (fr
Inventor
Janos Aradi
Thomas J. Bardos
Joseph A. Dunn
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.)
Therex Technologies Inc
Original Assignee
Therex Technologies Inc
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Therex Technologies Inc filed Critical Therex Technologies Inc
Publication of EP1248631A1 publication Critical patent/EP1248631A1/fr
Publication of EP1248631A4 publication Critical patent/EP1248631A4/fr
Withdrawn legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
    • C12N—MICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA
    • C12N15/00—Mutation or genetic engineering; DNA or RNA concerning genetic engineering, vectors, e.g. plasmids, or their isolation, preparation or purification; Use of hosts therefor
    • C12N15/09—Recombinant DNA-technology
    • C12N15/11—DNA or RNA fragments; Modified forms thereof; Non-coding nucleic acids having a biological activity
    • C12N15/113—Non-coding nucleic acids modulating the expression of genes, e.g. antisense oligonucleotides; Antisense DNA or RNA; Triplex- forming oligonucleotides; Catalytic nucleic acids, e.g. ribozymes; Nucleic acids used in co-suppression or gene silencing
    • C12N15/1131—Non-coding nucleic acids modulating the expression of genes, e.g. antisense oligonucleotides; Antisense DNA or RNA; Triplex- forming oligonucleotides; Catalytic nucleic acids, e.g. ribozymes; Nucleic acids used in co-suppression or gene silencing against viruses
    • C12N15/1132—Non-coding nucleic acids modulating the expression of genes, e.g. antisense oligonucleotides; Antisense DNA or RNA; Triplex- forming oligonucleotides; Catalytic nucleic acids, e.g. ribozymes; Nucleic acids used in co-suppression or gene silencing against viruses against retroviridae, e.g. HIV
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K31/00—Medicinal preparations containing organic active ingredients
    • A61K31/70—Carbohydrates; Sugars; Derivatives thereof

Definitions

  • the present invention relates to a novel method for inhibiting the growth, elaboration and/or replication of HIV in human patients and to the prevention and treatment of human acquired immunodeficiency syndrome (AIDS) and other diseases caused by retroviral infection. More particularly, in preferred aspects, the present invention provides a method for the use of a novel class of oligodeoxynucleotides consisting of 4-thio-2'-deoxyuridylate units for the prevention and treatment of both wild type and drug-resistant Human Immunodeficiency Virus 1 (HIV), the causative pathogen of AIDS.
  • HIV Human Immunodeficiency Virus 1
  • NRTIs Nucleoside Reverse Transcriptase Inhibitors
  • NRTIs Non-Nucleoside Reverse Transcriptase Inhibitors
  • NRTIs i.e., zidovudine [AZT], lamivudine, didanosine, zalcitabine, stavudine
  • ZT zidovudine
  • lamivudine didanosine
  • zalcitabine stavudine
  • stavudine do not carry functional 3'hydroxyl groups.
  • NNRTIs i.e., nevirapine [NVP], delaviridine, loviride
  • NNP nevirapine
  • loviride the enzymes active site
  • a new approach toward the development of anti-HIV drugs based on the inhibition of reverse transcriptase involves oligonucleotide and polynucleotides functioning as antitemplates [Bardos et al, Antimicrob. Agents Chemother.36, 108-114 (1992)]. These inhibitors are believed to act by binding to the template site of the polymerase enzyme and thereby displacing the natural viral template [Bardos and Ho, In: New Approaches to the Design of Antineoplastic Agents (Bardos, TJ and Kalman, TI eds.) Elsevier/North Holland, Amsterdam, New York, 315-332 (1982); Vlassov et al, V. Mil. Biol.
  • the antigene, or triple-helix forming, oligonucleotides exert their inhibitory activities by interaction with the double helical DNA and thereby inhibiting nucleic acid synthesis [Heider and Bardos, In; Cancer Chemotherapy Agents, American Chemical Society Wash. D.C., 529-565, (1995)].
  • the antitemplates which are non-sequence specific and may be entirely homopolymers (i.e., composed from mononucleotide units derived from the same base), represent a unique class of retrovirus inhibitors based on their chemical structure and mode of action.
  • a second class of antitemplates was recently prepared by conversion of the 4-amino group of the cytosine bases to the corresponding 4-thio groups in 2'-deoxyoligocytidylates [Tokes and Aradi, FEBS Lett. 396, 43-46 (1996)].
  • the resulting 4-thiodeoxy uridylic acids showed competitive inhibition of the reverse transcriptase enzyme of HIV similar to that obtained with the partially 5-thiolated oligocytidylates.
  • n 33, i.e., the compound is a 35meric oligonucleotide, which is termed "Suligovir”.
  • Figure 2 shows the stability of 4-thio-modified oligodeoxyuridylates determined by denaturing polyacrylamide gel electrophoresis after incubation of each compound for 0, 12 and 24 hours in tissue culture media containing 10% fetal calf serum. Bands of oligonucleotides and their breakdown products were visualized using a silver stain kit.
  • Figures 3A and 3B shows the result of experiments to study the chain length dependency of the inhibition of HIV replication by 4-thiolated oligodeoxyuridylates using the 20mer, 30mer and 35mer (Suligovir). Their inhibitory potential were determined in MT4 cells measuring the reverse transcriptase activity in the supernatant of the infected cell cultures. The shorter oligonucleotides were less active against HIV.
  • Figure 3A the concentration of oligonucleotides were given on the basis of mass. When the concentrations were 88 nM (corresponding to 1 ⁇ g/ml of Suligovir) the difference in inhibitory activity was even more pronounced ( Figure 3B).
  • Figure 4 shows the results of toxicity studies of Suligovir in mammalian cells determined by studying the effects of this drug on the colony formation of human granulocyte-macrophage progenitor cells, which are a major target of agents that can damage bone marrow. Cytotoxicity was measured using the an automated tetrazolium-based colorimetric assay as previously described [Pauwels et al, J Virol. Methods, 20, 309-321 (1988); Ikeda et al, Antiviral Res, 29, 163-173 (1996)]. As shown in Figure A, Suligovir did not considerably affect colony formation of granulocyte-macrophage progenitor cells, even at doses as high as 180 ⁇ g/ml.
  • the present invention relates to the use of 4-thio-2'-oligodeoxyuridylic acids, preferably ranging in length from 12 to 82 nucleotide units (referred to as 12 mer or 82 mer), preferably 35 nucleotide units (35 mer) for the inhibition of the growth, replication and/or elaboration of HIV in humans, and thereby for the suppression or cure of AIDS and AIDS related symptoms. It further relates to the use of these compounds in topical application for the prevention of AIDS, due to their ability to inhibit the entry of HIV into the cells.
  • the research data on which this invention is based demonstrate the activity of these compounds as inhibitors of the replication of both drug-sensitive (wild-type) and drug-resistant HIV, in particular, strains of HIV which are resistant to NRTIs, for example, zidovudine, lamivudine, didanosine, zalcitabine and stavudine, among others and NNTRIs, for example, nevirapine, delaviridine and loridine, among others.
  • NRTIs for example, zidovudine, lamivudine, didanosine, zalcitabine and stavudine, among others
  • NNTRIs for example, nevirapine, delaviridine and loridine, among others.
  • Compounds according to the present invention are 4-thio-2' -oligodeoxyuridylates as set forth in attached Figure 1, where n is 10 to 80. Pharmaceutically acceptable salts of these oligodeoxyuridylates are clearly contemplated by the present invention.
  • compositions according to the present invention comprise a therapeutically effective amount (anti-HIV effective amount) of one or more of the compounds according to the present invention, alone or preferably in combination with a pharmaceutically acceptable excipient, additive or carrier.
  • Methods according to the present invention are directed to administering to an HIV, AIDS or other patient in need of such therapy a therapeutically effective amount of one or more pharmaceutical compositions according to the present invention to inhibit the growth or replication of HIV in the treated patient and ultimately to treat, eliminate or reduce the symptoms associated with AIDS.
  • methods according to the present invention are directed to the topical or vaginal/cervical administration of pharmaceutical compositions containing 4-thio-oligodeoxyuridylates to healthy individuals in such form and amount as required to prevent their infection with HIV.
  • patient is used throughout the specification to describe a human patient, to whom treatment, including prophylactic treatment, with the compositions according to the present invention is provided.
  • treatment including prophylactic treatment, with the compositions according to the present invention is provided.
  • patient refers to that specific patient.
  • an effective amount is used throughout the specification to describe concentrations or amounts of compounds according to the present invention which may be used to produce a favorable change in the disease or condition treated, whether that change relates to the inhibition of the growth, replication and/or elaboration of the retro virus (preferably, HIV), including, reducing the likelihood of or preventing a patient contracting an HIV infection or a reduction in severity or elimination of the symptoms associated with a condition or disease state, whether that condition or disease state is an HIV infection or AIDS
  • the compounds, in pharmaceutical dosage form may be used as prophylactic agents for preventing a disease or condition from manifesting itself or substantially reducing the likelihood that a disease will manifest itself in a patient.
  • the pro-drug form of the compounds according to the present invention may be preferred.
  • compositions or their derivatives, including prodrug forms of these agents can be provided in the form of pharmaceutically acceptable salts.
  • pharmaceutically acceptable salts or complexes refers to appropriate salts or complexes of the active compounds according to the present invention which retain the desired biological activity of the parent compound and exhibit limited toxicological effects to normal cells.
  • Nonlimiting examples of such salts are (a) acid addition salts formed with inorganic acids (for example, hydrochloric acid, hydrobromic acid, sulfuric acid, phosphoric acid, nitric acid, and the like), and salts formed with organic acids such as acetic acid, oxalic acid, tartaric acid, succinic acid, malic acid, ascorbic acid, benzoic acid, tannic acid, pamoic acid, alginic acid, and polyglutamic acid, among others; (b) base addition salts formed with metal cations such as zinc, calcium, sodium, potassium, and the like, among numerous others including tertiary amines and related compounds.
  • Base additional salts of the phosphate functionality of compounds according to the present invention are those which are clearly preferred for use in the present invention. Sodium and potassium salts of the present compounds are preferred.
  • Modifications of the active compound can affect the solubility, bioavailability and rate of metabolism of the active species, thus providing control over the delivery of the active species. Further, the modifications can affect the anti-HIV activity of the compound, in some cases increasing.the activity over the parent compound. This can easily be assessed by preparing the prodrug form and testing its anti-HIV activity according to known methods well within the routineer's skill in the art.
  • the compounds of this invention may be incorporated into formulations for all routes of administration including for example, oral and parenteral including intravenous, intramuscular, intraperitoneal, intrabuccal, topical, transdermal, intracervical or intravaginal and in suppository form.
  • parenteral administration and in particuarly, IV administration is particularly preferred in the present method because HIV is a blood-borne disease and IV administration results in the compounds being adminstered at or near the site of infection.
  • compositions based upon these novel chemical compounds comprise the above-described compounds in a therapeutically effective amount for treating or preventing retroviral infections and other related diseases and conditions which have been described herein, optionally in combination with a pharmaceutically acceptable additive, carrier and/or excipient.
  • a therapeutically effective amount of one of more compounds according to the present invention will vary with the infection or condition to be treated, its severity, the treatment regimen to be employed, the pharmacokinetics of the agent used, as well as the patient treated.
  • the compound according to the present invention is formulated preferably in admixture with a pharmaceutically acceptable carrier.
  • a pharmaceutically acceptable carrier for therapeutic purposes, it is preferable to administer the pharmaceutical composition in parenteral, most preferably intravenous form, but a number of formulations may be administered via oral, parenteral, intramuscular, transdermal, buccal, subcutaneous, suppository or other route.
  • Intravenous and intramuscular formulations are preferably administered in sterile saline.
  • one of ordinary skill in the art may modify the formulations within the teachings of the specification to provide numerous formulations for a particular route of administration without rendering the compositions of the present invention unstable or compromising their therapeutic activity.
  • the modification of the present compounds to render them more soluble in water or other vehicle may be easily accomplished by minor modifications (salt formulation, etc.) which are well within the ordinary skill in the art. It is also well within the routineer's skill to modify the route of administration and dosage regimen of a particular compound in order to manage the pharmacokinetics of the present compounds for maximum beneficial effect to the patient.
  • the pro-drug form of the compounds may be preferred.
  • One of ordinary skill in the art will recognize how to readily modify the present compounds to pro-drug forms to facilitate delivery of active compounds to a targeted site within the host organism or patient.
  • the routineer also will take advantage of favorable pharmacokinetic parameters of the pro-drug forms, where applicable, in delivering the present compounds to a targeted site within the host organism or patient to maximize the intended effect of the compound.
  • the amount of compound included within therapeutically active formulations according to the present invention is an effective amount for treating the infection or condition.
  • the present compounds, and in particular, the 35 meric oligo-nucleotide Suligovir are used for treating HIV infections and AIDS related symptoms.
  • a therapeutically or prophylactically effective amount of the present preferred compound in dosage form usually ranges from slightly less than about 0.025mg./kg. to about lOg./kg. or more, preferably about 2.5-5 mg/kg to about 250 mg/kg of the patient or considerably more, depending upon the compound used, the condition or infection treated and the route of administration, although exceptions to this dosage range may be contemplated by the present invention.
  • Administration of the active compound may range from a preferred continuous (intravenous drip) to several oral administrations per day (for example, Q.I.D.) and may include oral, topical, parenteral, intramuscular, intravenous, sub-cutaneous, transdermal (which may include a penetration enhancement agent), buccal, vaginal, and suppository administration, among other routes of administration.
  • Intravenous administration is clearly the preferred route of administration.
  • a therapeutically effective amount of one or more of the compounds according to the present invention is preferably intimately admixed with a pharmaceutically acceptable carrier according to conventional pharmaceutical compounding techniques to produce a dose.
  • a carrier may take a wide variety of forms depending on the form of preparation desired for administration, e.g., oral or parenteral.
  • the carrier will usually comprise sterile water or aqueous sodium chloride solution, though other ingredients including those which aid dispersion may be included.
  • sterile water is to be used and maintained as sterile
  • the compositions and carriers must also be sterilized.
  • injectable suspensions may also be prepared, in which case appropriate liquid carriers, suspending agents and the like may be employed.
  • the present compounds may be used to treat human patients with an HIV infection, including AIDS patients. These patients can be treated by administering to the patient an effective amount of one or more of the compounds according to the present invention or its derivative or a pharmaceutically acceptable salt thereof optionally in a pharmaceutically acceptable carrier or diluent, either alone, or in combination with other known pharmaceutical agents, depending upon the disease to be treated). This treatment can also be administered in conjunction with other anti-HIV agents.
  • the present compound can be used on healthy persons who are potentially exposed to HIV infection.
  • the active compound is included in the pharmaceutically acceptable carrier or diluent in an amount sufficient to deliver to a patient a therapeutically effective amount for the desired indication, without causing serious toxic effects in the patient treated.
  • the compound is conveniently administered in any suitable unit dosage form, including but not limited to one containing 1 to 10,000 mg (10g.), preferably 5 to 500 mg or more of active ingredient per unit dosage form.
  • the concentration of active compound in the drug composition will depend on absorption, distribution, inactivation, and excretion rates of the drug as well as other factors known to those of skill in the art. It is to be noted that dosage values will also vary with the severity of the condition to be alleviated. It is to be further understood that for any particular subject, specific dosage regimens should be adjusted over time according to the individual need and the professional judgment of the person administering or supervising the administration of the compositions, and that the concentration ranges set forth herein are exemplary only and are not intended to limit the scope or practice of the claimed composition.
  • the active ingredient may be administered at once, or may be divided into a .number of smaller doses to be administered at varying intervals of time.
  • concentration of modified oligonucleotides was determined measuring the phosphate content of the stock solution [Tokes and Aradi, FEBS Lett. 396, 43-46 (1996)].
  • Anti-HIV Activity of the 4-Thiolated Oligodeoxynucleotides Two types of assay systems were used to study the anti-HIV activity of the 4-thiolated oligodeoxynucleotides. All experiments were performed in triplicate at least twice. In some studies, the inhibitory activity of the 4-thiolated oligomers against HIV was determined using a reverse transcriptase assay employing supernatants from the culture media of the Human T cell culture line, MT-4 , infected with HIV-l(IIIB) (Hoffman et al, Virology, 147, 326-335, (1985)]).
  • TCID 50 tissue culture infectious doses that establishes a productive infection in 50% of the parallel cultures
  • TCID 50 tissue culture infectious doses that establishes a productive infection in 50% of the parallel cultures
  • the cells were removed by centrifugation and the reverse transcriptase activity was determined in 50 ml aliquots of the supernatants using poly (A).poly(dT) ⁇ 6 as the template primer and [ 3 H]dTTP as the monomer substrate.
  • the radioactive product was collected by filtration and quantified by liquid scintillation counting.
  • the oligonucleotide inhibitors were added to the cultures of MT-4 cells 1 hour post infection or as indicated. Appropriate control samples were prepared without inhibitors.
  • a syncytium-forming microassay was used to quantify the amount of infectious HIV in supernatant fluid of virus infected Human CEM-SS cell cultures [Nara et al, AIDS Res Hum Retroviruses, 3, 283-302 (1987); Toth et al, J. Virol, 69, 2223- 2232 (1995)].
  • Individual wells of a 96-well microtiter plate were coated with 50 ⁇ l of a 50 ⁇ g/ml ploy-L-lysine solution (PLL), allowed to stand at room temperature for 1 hour, after which residual PLL was removed by two washes with PBS.
  • PLL ploy-L-lysine solution
  • CEM-SS cells suspended in complete RPMI 1640 were plated into each well at a final concentration of 5 x 10 4 cells/well. The cells were allowed to attach for 30 min at 37°C. Following this, supernatants were removed from the wells and replaced with 100 1 fresh complete media. The wells were examined for the presence of adherent syncytium-forming units (SFU's) at 4 days post infection. Control CEM-SS cells were always included as a reference source when evaluating syncytium formation.
  • SFU's adherent syncytium-forming units
  • the 4-thiolated oligodeoxyuridylates are competitive inhibitors of the purified HIV-1 reverse transcriptase with respect to the template primer, fulfilling the requirement for an antitemplate inhibitor, i.e. the inhibitory oligonucleotide interacts with the free enzyme, competing for the template-binding site with its natural counterparts [Tokes and Aradi, FEBS Lett. 396, 43-46 (1996)].
  • the inhibitory activity of the 4-thiolated oligodeoxyuridylates on purified reverse transcriptase depended on the chain length. Clearly more of the smaller molecules than of the larger molecules are required to fully occupy the templates site.
  • Suligovir is a very potent inhibitor of HIV-1 attachment and entry into target cells (Table 3), 500 times more potent than the standard used in this assay, the polymer California Sky Blue (CSB).
  • Suligovir inhibited virus entry (as measured by an attachment assay utilyzing the expression of the ⁇ -galactosidase enzyme measured by chemiluminescence in viral infected HeLa CD4
  • Cytotoxicity The toxicity of Suligovir to mammalian cells was determined by studying the effects of this drug on the colony formation of human granulocyte-macrophage progenitor cells, which are a major target of agents that can damage bone marrow. Cytotoxicity was measured using the an automated tetrazolium-based colorimetric assay as previously described [Pauwels et al, J. Virol. Methods, 20, 309-321 (1988); Ikeda et al, Antiviral Res, 29, 163-173 (1996)]. As shown in Figure 4, Suligovir did not considerably affect colony formation of granulocyte-macrophage progenitor cells, even at doses as high as 180 ⁇ g/ml.
  • NRTI nucleoside-type reverse transcriptase inhibitors
  • NRTI non-nucleotide reverse transcriptase inhibitors
  • Viral cytopathogencity was determined by Serquest Inc., a Division of Southern Research Institute, Gaithersburg Maryland using the tetrazolium-based colorimetric assay, and the data were analyzed using a program developed by the Southern Research Institute. A number of viruses were used in these studies, which include some that are resistant to both the NNRTIs and NRTIs. None of these viruses was resistant to Suligovir as shown in the summary Tables 4 and 5.
  • This series of thiolated oligonucleotides are chemically well-defined molecules that inhibit the replication of HIV by either or both of the following two mechanisms: 1) by inhibition of HIV reverse transcriptase at the template binding site; 2) inhibition of the entry of HIV into cells. They show a broad range of activity against various HIV mutants and therefore should be useful in the treatment of drug-resistant AIDS. In addition, they may be used in topical formulations as a prophylactic agent to prevent the spread of AIDS.
  • Time of INHIBITION 3 treatment (RT activity: cpnr 5 ;
  • CSB Chicago Sky Blue. This is a control compound with a known effect on both virus attachment and fusion.

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Abstract

La présente invention concerne une nouvelle méthode destinée à l'inhibition de la croissance, de l'élaboration et/ou de la réplication du VIH chez des patients humains et à la prévention et au traitement du syndrome d'immunodéficience acquise (SIDA) et d'autres maladies induites par l'infection rétrovirale. Dans des aspects préférés, la présente invention concerne une méthode d'utilisation d'un nouveau type d'oligodésoxynucléotides, comprenant des unités de 4-thio-2'désoxyuridylate, destinés à la prévention et au traitement du virus de l'immunodéficience humaine type 1 (HIV) de type sauvage et chimio-résistant, l'agent pathogène qui cause le SIDA.
EP01901750A 2000-01-06 2001-01-05 Methodes d'inhibition/traitement d'infections par le vih et de symptomes lies au sida Withdrawn EP1248631A4 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US17466800P 2000-01-06 2000-01-06
US174668P 2000-01-06
PCT/US2001/000280 WO2001049297A1 (fr) 2000-01-06 2001-01-05 Methodes d'inhibition/traitement d'infections par le vih et de symptomes lies au sida

Publications (2)

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EP1248631A1 true EP1248631A1 (fr) 2002-10-16
EP1248631A4 EP1248631A4 (fr) 2003-05-28

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EP (1) EP1248631A4 (fr)
AU (1) AU2761901A (fr)
CA (1) CA2396240A1 (fr)
WO (1) WO2001049297A1 (fr)

Non-Patent Citations (2)

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See also references of WO0149297A1 *

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CA2396240A1 (fr) 2001-07-12
WO2001049297A8 (fr) 2002-02-07
EP1248631A4 (fr) 2003-05-28
AU2761901A (en) 2001-07-16
WO2001049297A1 (fr) 2001-07-12

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