WO2000049148A1 - Nouvelle proteine de type recepteur de cytokines - Google Patents
Nouvelle proteine de type recepteur de cytokines Download PDFInfo
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- WO2000049148A1 WO2000049148A1 PCT/JP2000/000939 JP0000939W WO0049148A1 WO 2000049148 A1 WO2000049148 A1 WO 2000049148A1 JP 0000939 W JP0000939 W JP 0000939W WO 0049148 A1 WO0049148 A1 WO 0049148A1
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- 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
- C07K14/705—Receptors; Cell surface antigens; Cell surface determinants
- C07K14/715—Receptors; Cell surface antigens; Cell surface determinants for cytokines; for lymphokines; for interferons
Definitions
- the present invention provides a novel cytokine receptor-like protein expressed in blood cells, a DNA encoding the protein, a vector containing the DNA, a host cell carrying the vector, an antibody against the protein,
- the present invention relates to a method for screening a compound used, and a compound which can be isolated by the screening method.
- cytokines a group of humoral factors
- a number of site forces have been identified so far, and as a result of their analysis, many site forces have a wide range of physiological activities, and one site force in can be used for various cells. It has been shown to act and exert various effects on cells.
- These cytokines form a communication network between cells such as hematopoietic cells, lymphoid cells, and endothelial cells, and are thought to regulate the differentiation, proliferation, and activation of these cells. (Mariko Ozu et al., 1992, Cytokine therapy, Nankodo, PP2-14).
- Site power-in is expected to have clinical applications, especially in the medical field, and is being applied to the treatment of various diseases, including cancer, infectious diseases, autoimmune diseases, and thrombosis.o
- Type I cytokine receptors include many influenza leukin receptors, including the IL-2; S receptor, the colony stimulating factor receptor, the erythropoietin receptor, and the like, and the hemopoietin receptor family. —Also called perfamily.
- Type I cytokine receptor families have structurally common features, a WS box consisting of tributophan-serine-X-tributophan-serine residues immediately above the cell membrane, and the four cystine residues usually located at the front end.
- the group has a fibronectin type III similar structure.
- boxl there is a relatively homologous part called boxl near the membrane in the intracellular region and box2 on the C-terminal side. These regions are considered essential for intracellular communication.
- family cytokine receptor families such as the type II cytokine family that includes inulin ferrons / receptors and the TNF receptor / NGF receptor family.
- cytokine receptors Although a large number of cytokine receptors have been identified in this way, there are many unknowns in cytokine signaling, and unknown signaling molecules that are involved in the complex information network of blood cells are still being identified. It seems that there is more than one. Therefore, identifying new cytokine receptors that are expressed on lymphoid cells and hematopoietic cells is not limited to elucidation of such site-in signaling but also various diseases involving cytokines. It is also crucial in developing therapeutic and preventive measures against illness. Disclosure of the invention
- An object of the present invention is to provide a novel cytokine receptor-like protein expressed in blood cells and its gene. Another object of the present invention is to provide a vector into which the gene is inserted, a host cell holding the vector, and an antibody that binds to the protein. Still another object of the present invention is to provide a method of screening for a compound that binds to the protein, such as a ligand, using the protein.
- the present inventors have proposed a novel factor or a receptor thereof involved in immune and differentiation functions.
- the proprietary signal-sequence trap (SST) method Japanese Patent Application No. 9-324912 was used to generate polymorphic RNA derived from lymphocytes that had been induced to differentiate.
- the cDNA encoding the secreted membrane protein was screened.
- the present inventors have proposed a receptor belonging to the type I site force-in receptor super family 1 (Miyajima, A. et al., Ann. Rev. Immunol. (1992) 10, 295-331).
- a gene encoding a novel receptor-like protein having homology to was successfully isolated.
- This gene was expressed in the heart, lung, liver, and spleen of mouse tissues, as well as in myeloid lymphocyte cell lines such as Ba / F3, DA-1, and CTLL2.
- the membrane-proximal region of the protein encoded by the gene could replace the membrane-proximal region of human EP0R in transmitting propagation signals and activating JAK2.
- the receptor-like protein of the present invention has a region that can be presumed to be a boxl'box2 region that transmits a signal into a cell. It is suggested that it functions as a signal transduction molecule from outside to the cell, especially in the immune system. Therefore, the protein is useful as a tool for purification and cloning of factors involved in immune / differentiation functions, and also for screening drug candidate compounds for immune function-related diseases.
- the present invention relates to novel receptor-like proteins expressed in hematopoietic cells, their genes, and their production and use.
- the method for producing a protein according to (4) comprising culturing the host cell according to (3) and recovering the protein expressed from the host cell or a culture supernatant thereof.
- nucleotide having a chain length of at least 15 bases which hybridizes with DNA consisting of the nucleotide sequence of SEQ ID NO: 1 or 3 or a complementary strand thereof,
- ligand refers to a protein that activates its function by binding to the protein of the present invention expressed on a cell membrane.
- agonist refers to a protein capable of causing the same phenomenon (activation of the protein of the present invention) as the binding of the protein of the present invention to a ligand.
- ligand refers to molecules that can bind.
- angiagonist refers to a molecule that specifically inhibits the function of the protein of the present invention by binding thereto.
- the present invention provides a novel cytokine receptor-like protein expressed in blood cells.
- the nucleotide sequences of the two mouse-derived cDNAs isolated by the present inventors are shown in SEQ ID NOs: 1 and 3, respectively, and the amino acid sequences of the proteins encoded by the cDNAs are shown in SEQ ID NOs: 2 and 3, respectively. This is shown in Fig. 4 (see Fig. 1).
- These proteins have homology to a known protein belonging to the type I cytokine receptor superfamily, have a signal sequence at their N-terminus, and have the protein described in SEQ ID NO: 2. It has an amino acid region rich in hydrophobicity that is expected to be a transmembrane region in the middle (see Fig. 2).
- the protein discovered by the present inventors is considered to be a novel protein belonging to the type I cytokine receptor superfamily. Also, since the protein proximal region substitutes for the human EP0R membrane proximal region in transmitting proliferation signals and activating JAK2, the protein is formed by complexing with a heterologous receptor. It is suggested that it is involved in signal transduction through activation of JAK2.
- the gene coding for the protein was cloned from lymphocytes, and Northern blot analysis showed expression in heart, lung, liver, spleen, Ba / F3, DA-1, Expression was also observed in myeloid and lymphoid cell lines such as CTLL2. Therefore This receptor-like protein is thought to play a regulatory role in immunity and hematopoiesis, and purifies and clones factors related to the function of the immune system. It can be used as a useful tool for screening compounds. It can also be used for the treatment of various infectious diseases, autoimmune diseases, and gene therapy in tumor immunity.
- the present invention also includes a protein functionally equivalent to the protein described in SEQ ID NO: 2 or 4.
- “functionally equivalent” means that the target protein functions as a receptor protein.
- the protein functionally equivalent to the protein described in SEQ ID NO: 2 preferably has characteristics as a type I cytokine receptor.
- Such features include, for example, boxl and box2 regions.
- boxl is a region consisting of 8 amino acids that are present in the intracellular region near the membrane of the site force-in receptor and contains a large amount of proline
- box2 is located from the C-terminus and contains the LEVL sequence. It is a region consisting of amino acids. Both are thought to be important for intracellular signal transduction.In particular, boxl is thought to be important for the interaction between Jak (Janus kinase) and the cytokine receptor (Ning Jiang, J.
- the protein functionally equivalent to the protein described in SEQ ID NO: 4 preferably has characteristics as a soluble cytokine receptor.
- the soluble site force-in receptor is a protein consisting only of the extracellular domain, and may be the entire extracellular domain or a part of the extracellular domain as long as it has a ligand-binding activity. Soluble site force-in receptors can be both ligand inhibitors and promoters depending on their signaling pathways (Smith, DH, Science, 238, 1704-1707 (1987); Novick, D., Cytokine). , 4, 6-11 (1992)).
- the protein has an amino acid sequence in which one or more amino acids are mutated in the amino acid sequence of SEQ ID NO: 2 or 4, and comprises the amino acid sequence of SEQ ID NO: 2 or 4.
- the number of amino acids to be mutated in such a mutant is usually within 30 amino acids, preferably within 15 amino acids, more preferably within 5 amino acids, and further preferably within 3 amino acids. .
- the amino acid residue to be mutated is mutated to another amino acid in which the properties of the amino acid side chain are conserved.
- the properties of the amino acid side chain include hydrophobic amino acids (A, I, L, M, F, P, W, Y, V) and hydrophilic amino acids (R, D, N, C, E, Q, G , H, K, S, T), an amino acid having an aliphatic side chain (G, A, V, L, I, P), an amino acid having a hydroxyl group-containing side chain (S, ⁇ , ⁇ ), a sulfur atom-containing side Chain-containing amino acids (C, M), carboxylic acids and amino acids with amide-containing side chains (D, N, E, Q), aminoyl having a base-containing side chain, K, ⁇ ), and amino acid having an aromatic-containing side chain (H, F, Y, W). Represents the one-letter designation of amino acids).
- Examples of the protein obtained by adding one or more amino acid residues to the protein of SEQ ID NO: 2 or 4 include a fusion protein containing the protein of SEQ ID NO: 2 or 4.
- the fusion protein is a fusion of the protein of SEQ ID NO: 2 or 4 or a partial peptide thereof with another peptide or protein, and is included in the present invention.
- Other peptides to be fused include tags used for the purpose of facilitating protein purification and detection, and other cytokine receptor or partial peptides thereof (see FIG. 5).
- a method for producing a fusion protein includes, for example, linking a DNA encoding the protein of the present invention with a DNA encoding another peptide or protein such that the frames match, introducing the DNA into an expression vector, and expressing the DNA in a host. Any method may be used, and a method known to those skilled in the art can be used. Other peptides or proteins to be fused with the protein of the present invention are not particularly limited.
- a protein functionally equivalent to the above-mentioned protein is also included in the protein of the present invention.
- proteins include homologues of mammals other than mice (for example, proteins encoded by human genes).
- Hybridization for isolating DNA encoding functionally equivalent proteins can be performed, for example, under conditions where the stringency is 10% formamide, 5xSSPE, 1X dendrogen solution, and lx salmon sperm DNA. It can be carried out. More preferable conditions (more stringent conditions) are the conditions of 25% formamide, 5xSSPE, 1X dendrogen solution, and lx salmon sperm DNA, and more preferable conditions (more stringent conditions) , 50% formamide, 5xSSPE, lx Denhardt's solution, lx salmon sperm DNA.
- the protein functionally equivalent to the protein of SEQ ID NO: 2 or 4 encoded by DNA isolated by these hybridization techniques or gene amplification techniques is usually the protein of SEQ ID NO: 2 or 4. And has high homology in the amino acid sequence.
- a high homology is usually 70% or more homology, preferably 80% or more homology, more preferably 95% or more homology.
- the homology of proteins can be determined by following the algorithm described in the literature (Wirlbur, W. J. and Lipman, D. J. Proc. Nat 1. Acad. Sci. USA (1983) 80, 726-730).
- the protein of the present invention can be prepared as a recombinant protein or as a natural protein by methods known to those skilled in the art. If the protein is a recombinant protein, for example, if it is a protein expected to be membrane-bound, a portion of the protein other than the region required for membrane binding is secreted out of the cell. Then, the culture of this cell After collecting and concentrating the culture supernatant, it is subjected to chromatography such as ion exchange, reverse phase, gel filtration, or affinity chromatography in which an antibody against the protein of the present invention is immobilized on a column, or Further, it is possible to purify by combining a plurality of these columns.
- chromatography such as ion exchange, reverse phase, gel filtration, or affinity chromatography in which an antibody against the protein of the present invention is immobilized on a column, or Further, it is possible to purify by combining a plurality of these columns.
- the protein of the present invention is expressed in host cells (eg, animal cells, E. coli, etc.) as a fusion protein with glutathione s transferase protein or as a recombinant protein to which multiple histidines are added. Then, the expressed recombinant protein is purified using a glutathione column or a nickel column. Thereafter, if necessary, a region other than the target protein in the fusion protein can be prepared by a method of cutting and removing the region with thrombin or factor-Xa or the like. If the protein is a natural protein, it is isolated, for example, by subjecting an extract of a cell expressing the protein of the present invention to an affinity column to which an antibody of the present invention described later is bound to purify the protein. be able to.
- host cells eg, animal cells, E. coli, etc.
- the expressed recombinant protein is purified using a glutathione column or a nickel column.
- the present invention also includes partial peptides of the protein of the present invention.
- the partial peptide of the present invention has an amino acid sequence of at least 8 amino acids or more, preferably 15 amino acids or more, more preferably 50 amino acids or more (for example, 70 amino acids, 100 amino acids, or 130 amino acids or more).
- the partial peptide can be used, for example, for preparing an antibody against the protein of the present invention, for screening a compound such as a ligand that binds to the protein of the present invention, and for preparing a competitive inhibitor of the protein of the present invention.
- Examples of the partial peptide of the present invention include a protein in which a signal peptide is removed from the protein of the present invention and a protein in which a region in a cell is removed.
- a partial peptide (functioning as a competitive inhibitor of the protein of the present invention) which has a binding ability to a ligand but does not have a signal transmitting ability to cells is included.
- the partial peptide of the present invention can be produced by a genetic engineering technique, a known peptide synthesis method, or by cleaving the protein of the present invention with an appropriate peptide.
- the present invention also provides a DNA encoding the protein of the present invention.
- the DNA of the present invention may be in any form as long as it can encode the protein of the present invention. That is, it does not matter whether it is cDNA synthesized from mRNA, genomic DNA, or chemically synthesized MA.
- DNAs having any base sequence based on the degeneracy of the genetic code are included as long as they can encode the protein of the present invention.
- the DNA of the present invention can be prepared by a method known to those skilled in the art.
- a cDNA library is prepared from cells expressing the protein of the present invention, and a part of the DNA sequence of the present invention (for example, the DNA sequence of SEQ ID NO: 1 or 3) is used as a probe for hybridization. It can be prepared by performing chilling.
- RNA is prepared from cells expressing the protein of the present invention, and oligo DNA is synthesized based on the sequence of the DNA of the present invention (for example, the DNA sequence of SEQ ID NO: 1 or 3). It can also be prepared by performing a PCR reaction using as a primer and amplifying a cDNA encoding the protein of the present invention.
- the DNA of the present invention can be used to produce the protein of the present invention as a recombinant protein. Further, when the MA encoding the protein of the present invention is defective, application to antisense function inhibition, gene therapy for replacing a normal gene, and the like can be considered.
- the present invention also provides a vector into which the DNA of the present invention has been inserted.
- the vector of the present invention is not particularly limited as long as it can express the MA of the present invention in a host cell.
- the vector is amplified in Escherichia coli (for example, JM109, DH5H, HB10K XLlBlue), etc., and the ⁇ ori '' to be amplified in Escherichia coli is required for large-scale preparation.
- a transformed Escherichia coli selection gene for example, a drug resistance gene that can be identified by any drug (ampicillin, tetracycline, kanamycin, chloramphenicol)
- M13 system vector, pUC system vector, pBR322, pBluescript, pCR-Script, and the like can be mentioned.
- an expression vector is particularly useful.
- the expression vector may have the above-mentioned characteristics such that the vector is amplified in Escherichia coli, and may be used in a host such as JM109, DH5 or HB10K XLlBlue.
- a promoter eg, lac, T7, etc.
- Examples of such a vector include pGEX, pEGFP, or pET (in this case, BL21 expressing T7 MA polymerase is preferable as a host) in addition to the vectors described above.
- the promoter required for expression in cells (SV40, MMLV-LTR, EF1, and CMV promoter, etc.) ) Is essential, and it is more preferable to have a gene for selecting cell transformation (for example, a drug resistance gene that can be identified by a drug (neomycin, G418, etc.)).
- Vectors having such properties include, for example, pMAM, pDR2, pBK-RSV, pBK-CMV, pOPRSV, p0P13, and the like.
- a vector having a DHFR gene complementary to a CH0 cell lacking a nucleic acid synthesis pathway can be used to amplify with methotrexate (MTX).
- MTX methotrexate
- COS having a gene expressing the SV40 T antigen on the chromosome can be used.
- a vector such as pcD having SV40 replication mechanism.
- a method for expressing the DNA of the present invention in an animal body a method of incorporating the DNA of the present invention into an appropriate vector and introducing the DNA into a living body by a retrovirus method, a ribosome method, a cationic liposome method, an adenovirus method, or the like is used. And so on.
- pAdexlcw and pZIPneo are examples.
- Can be General genetic manipulation such as insertion of the DNA of the present invention into a vector can be performed according to a conventional method (Molecular Cloning, 5.61-5.63).
- the present invention also provides a host cell into which the vector of the present invention has been introduced.
- the host cell into which the vector of the present invention is introduced is not particularly limited, and for example, Escherichia coli and various animal cells can be used. Examples of Escherichia coli include JM109, DH5 and HB101, and examples of animal cells include CH0 cells, COS cells, 3T3 cells, and HeLa cells. For the purpose of expressing a large amount in animal cells, CH0 cells are particularly preferable.
- the introduction of the vector into the host cell can be performed, for example, by a method such as the calcium phosphate method, the DEAE dextran method, the electrolysis, and the lipofection.
- the present invention also provides an antibody that binds to the protein of the present invention.
- the form of the antibody of the present invention is not particularly limited, and includes a monoclonal antibody as well as a polyclonal antibody. It also includes antisera obtained by immunizing egrets and the like with the protein of the present invention, polyclonal antibodies and monoclonal antibodies of all classes, and human antibodies and humanized antibodies obtained by genetic modification.
- the antibody of the present invention can be prepared by the following method.
- a polyclonal antibody for example, a small animal such as a heron is immunized with the protein of the present invention to obtain a serum, which is then subjected to an affinity column in which the protein of the present invention is coupled.
- the fraction can be prepared by obtaining a fraction that recognizes only the protein, and further purifying immunoglobulin G or M from this fraction using a protein A or protein G column.
- a monoclonal antibody In the case of a monoclonal antibody, a small animal such as a mouse is immunized with the protein of the present invention, the spleen is excised from the mouse, and the resulting spleen is crushed into cells, and mouse myeloma cells and a reagent such as polyethylene glycol are used. A clone that produces an antibody against the protein of the present invention is selected from the fused cells (hybridoma) thus obtained.
- the obtained hybridoma was transplanted intraperitoneally into the mouse, and The ascites is collected, and the obtained monoclonal antibody is purified by, for example, ammonium sulfate precipitation, protein A, futin G column, DEAE ion exchange chromatography, or an affinity column to which the protein of the present invention is coupled. It can be prepared.
- the antibody of the present invention is used for purification and detection of the protein of the present invention, and is also a candidate for an agonist and an agonist of the protein of the present invention. It is also conceivable to apply the antibody of the present invention to antibody therapy for immune-related diseases. When used for antibody therapy, human or humanized antibodies are preferred to reduce immunogenicity.
- a transgenic animal having a repertoire of human antibody genes is immunized with a protein serving as an antigen, a protein-expressing cell or a lysate thereof to obtain antibody-producing cells, and the resulting cells are fused with myeloma cells using a hybridoma.
- a human antibody to the protein may be obtained (see International Patent Application Publication Nos. W092-03918, W093-Z227, W094-02602, W094-25585, W096-33735, and W096-34096).
- the antibody of the present invention may be an antibody fragment or modified antibody thereof as long as it binds to the protein of the present invention.
- an antibody fragment Fab, F (ab ') 2, Fv or a single chain Fv (scFv) obtained by linking an Fv of an H chain and an L chain with an appropriate linker (Huston, JS et al., Proc. Natl. Acad. Sci. USA (1988) 85, 5879-5883).
- the antibody is treated with an enzyme such as papain or pepsin to generate an antibody fragment, or a gene encoding these antibody fragment is constructed and introduced into an expression vector. Expressed in cells (eg, Co, MS et al., J. Immunol.
- modified antibody an antibody bound to various molecules such as polyethylene glycol (PEG) can be used.
- PEG polyethylene glycol
- the “antibody” of the present invention also includes these modified antibodies. Such a modified antibody can be obtained by subjecting the obtained antibody to chemical modification. These methods are already established in this field.
- the present invention also provides a nucleotide that hybridizes with a DNA consisting of the nucleotide sequence shown in SEQ ID NO: 1 or 3 or a complementary strand thereof and has a chain length of at least 15 bases.
- This nucleotide preferably hybridizes specifically with a DNA consisting of the nucleotide sequence shown in SEQ ID NO: 1 or 3, or a complementary strand thereof.
- the term "specifically hybridize” as used herein means that under normal hybridization conditions, preferably under stringent hybridization conditions, cross-hybridization with DNA encoding other proteins is performed. Means not to occur significantly.
- nucleotides include probe-primers, nucleotides or nucleotide derivatives capable of specifically hybridizing with the DNA encoding the protein of the present invention or its complementary strand (eg, antisense oligonucleotides-ribozymes, etc.). Is included.
- the present invention also provides a method for screening for a compound that binds to the protein of the present invention, using the protein of the present invention.
- This screening method comprises: (a) a step of bringing a test sample into contact with the protein of the present invention or a partial peptide thereof, and (b) selecting a compound having an activity of binding to the protein of the present invention or a partial peptide thereof. Process.
- the protein of the present invention used for screening may be any of a recombinant type, a natural type and a partial peptide. Further, the protein may be a purified protein or a partial peptide thereof, or may be a form expressed on a cell surface or a form as a membrane fraction.
- the test sample is not particularly limited, and includes, for example, cell extracts, cell culture supernatants, proteins, peptides, and synthetic low-molecular compounds.
- As a method for isolating a ligand for the protein using the protein of the present invention many methods known to those skilled in the art can be used.
- a cDNA library using a phage vector is prepared from cells that are expected to express the ligand (eg, T cells, etc.), and this is prepared on LB-agarose. Immobilize the protein expressed in the filter and expressed in the filter, purify the protein of the present invention as a biotin label or a fusion protein with GST protein, and react with the filter to express the protein to be bound.
- a cDNA library is prepared that is expressed in a form that is fused with E. coli.
- the cDNA library is introduced into the yeast cells described above, library-derived cDNA is isolated from the detected positive clones, introduced into E. coli, and expressed (in yeast cells).
- the reporter gene is activated by the binding of the two, and a positive clone can be confirmed.
- “Two hybrid system” (MATCHMARKER Two-Hybrid Systemj, “Maminaliaii MATCHMAKER Two-Hybrid Assay Kit, MATCHMAKER One-Hybrid Systemj (all manufactured by clontech), HybriZAP Two-Hybrid Vector Systemj (stratagene), literature rDaltoii S, an d Treisman R (1992) Character i zat i on of SAP-1, a protein recruited by serum respons e factor to the c-fos serum response element.Cell 68, 597-612 '') is there.
- screening for a ligand that specifically binds to the protein of the present invention comprises screening the extracellular domain of the protein of the present invention and an intracellular domain containing a transmembrane domain of a known receptor protein such as a hemopoietin receptor having signal transduction ability. And expressing the chimeric receptor produced on the cell surface of an appropriate cell line, preferably a cell line that can survive and grow only in the presence of an appropriate growth factor (growth factor-dependent cell line). Thereafter, the cell line can be cultured by adding a material expected to contain various growth factors, cytodynamic factors, hematopoietic factors and the like.
- This method utilizes the fact that the above-mentioned growth factor-dependent cell line can survive and proliferate only when the test material contains a ligand that specifically binds to the extracellular domain of the protein of the present invention.
- Known hemopoietin receptors include, for example, thrombopoietin receptor, erythropoietin receptor, G-CSF receptor, gpl30, and the like.Partners of the chimeric receptor used in the screening system of the present invention include these known partners.
- the present invention is not limited to the hemopoietin receptor, and any cytoplasmic domain having a structure necessary for signal transduction activity may be used.
- the 0X40 receptor belonging to the TNF receptor superfamily can be selected as a partner of the chimeric receptor (Mallet, S. et al., EMBO J., 19, 1063-1068 (1990)). Since the 0X40 receptor can transmit a positive signal into cells, screening of ligands can be performed using proliferative responses as an index (Baum, PR et al., EMBO J., 13, 3992). -4001 (1994)).
- a growth factor-dependent cell line for example, an IL3-dependent cell line such as BaF3 or FDC-P1 can be used.
- the protein of the present invention is expressed in cells that do not express the ligand, and then the expressed cDNA library constructed from cells that are expected to express the ligand is expressed in the cells.
- the culture supernatant obtained by the introduction into the cell is added, and a ligand is searched for using a certain change of the cell (for example, including a functional change such as a proliferation activity or a morphological change) as an index.
- a certain change of the cell for example, including a functional change such as a proliferation activity or a morphological change
- the culture supernatant of cells expected to express the ligand of the present invention is placed on an affinity column on which the protein of the present invention is immobilized, and the protein that specifically binds to the column is purified.
- the DNA encoding the ligand is obtained by analyzing the amino acid sequence of the obtained protein (ligand), synthesizing oligo DNA based on the amino acid sequence, and screening a cDNA library using the DNA as a probe. It is possible.
- a quinula protein consisting of the extracellular region of the protein of the present invention and the Fc region of an antibody (for example, human IgG [antibody]) and purified using a protein A column or the like. Since such an antibody-like chimeric protein has ligand binding activity, it can be appropriately labeled with a radioisotope or the like and then used for ligand screening (Suda, T. et al., Cell, 175, 1169-1178 (1993)).
- cytokines such as one molecule of the TNF family
- the reaction of various cells with the antibody-like chimeric protein and the cells that have exhibited binding activity It may be possible to isolate the ligand.
- the ligand can be similarly isolated using cells into which the cDNA library has been introduced.
- the antibody-like chimeric protein can be used as an agonist.
- an agonist against the protein and examples of the method for isolating the angiotensin and angiogonist include a method of allowing a compound, a natural product bank, or a random phage peptide display library to act on the immobilized protein of the present invention, and screening for binding molecules.
- a screening method using high throughput by combinatorial chemistry technology (Wrighton NC; Farrell FX; Chang R; Kashyap AK; Barbone FP; Mulcahy LS; Johnson DL; Barrett RW; Jolliffe LK; Dower WJ.
- the thus isolated ligand, agonist, and antagonist are candidates for a drug for promoting or inhibiting the activity of the protein of the present invention, and diseases involving the protein of the present invention (for example, immune system). (Related diseases).
- the compound isolated by the screening method of the present invention can be used as a pharmaceutical preparation by a known pharmaceutical production method.
- it is administered to a patient together with a pharmacologically acceptable carrier or vehicle (saline, vegetable oil, suspension, surfactant, stabilizer, etc.).
- Administration will be transdermal, intranasal, transbronchial, intramuscular, intravenous, or oral, depending on the nature of the compound.
- the dosage varies depending on the patient's age, body weight, symptoms, administration method, and the like, but those skilled in the art can appropriately select an appropriate dosage.
- the dose of the compound having the binding activity to the protein of the present invention varies depending on the symptom.
- the dose of the compound having the binding activity to the protein of the present invention varies depending on the symptom.
- the dose of the compound having the binding activity to the protein of the present invention varies depending on the symptom.
- for an adult assuming a body weight of 60 kg
- about 0.1 to 100 mg per day Preferably it is about 1.0 to 50 mg, more preferably about 1.0 to 20 m.
- the single dose depends on the subject, target organ, symptoms, Depending on the method of administration, for example, in the form of an injection, for an adult (assuming a body weight of 60 kg), about 0.01 to 30 mg, preferably about 0.1 to 20 mg, more preferably about 0.1 to 1 Omg per day is injected intravenously. Conveniently for administration. In the case of other animals, the dose can be administered in terms of the amount converted per 60 kg body weight or the amount converted per body surface area.
- FIG. 1 shows the nucleotide sequence and deduced amino acid sequence of the cloned Deltal cDNA.
- the numbers on the far right indicate nucleotide positions.
- Bold underlines indicate putative signal sequences and transmembrane regions.
- Thin underlines indicate Box 1 and Box 2 areas. The enclosed area is a WSXWS box-like array.
- FIG. 2 shows the identities and similarities between Deltal and other known cytokine receptors.
- FIG. 3 is a photograph showing the expression of Deltal in mouse tissues. MA molecular weight Shows the maximum mobility in kilobases.
- FIG. 4 is a photograph showing Northern plot hybridization of a mouse multi-tissue plot. The mobility of the RNA molecular weight marker is shown in kilobase.
- FIG. 5 is a diagram showing the structure of a chimeric receptor. The wild-type Deal and EP0R are shown schematically with the textured EP0-DeltalR, hEDER, and hMPL-DeltalR. The fused domains are indicated by restriction sites generated within the homologous cDNA.
- FIG. 6 is a diagram showing factor reactivity of FDC-P1 transfectants. The time course of proliferation of FDC-P1 cells transduced by retroviruses with various receptor constructs was shown.
- FIG. 5 is a photograph showing activation of JAK2 kinase through chimeric EDER ectopically expressed in FDC-P1 cells.
- FIG. 8 is a photograph showing immunoprecipitation of tagged Real expressed on Ba / F3 cells. The position of the Delta Flag (point of the arrow) and the molecular weight are shown.
- FIG. 9 shows a map of Deltal in the central region of mouse chromosome 5. Deltal was located on mouse chromosome 5 by interspecific backcross analysis. The pattern of separation of Deltal and adjacent genes in 106 backcross animals typed for all loci is shown at the top of the figure. Each column represents a chromosome identified in the backcross progeny inherited from the (C57BL / 6JXM. Spretus) F1 parent. The shaded box indicates the presence of the C57BL / 6J allele, and the white box indicates the presence of the M.
- OVA-23-3 T cell receptor specific for amino acids 323-339 of mouse ovalbumin (OVA) Yuichi's transgenic mouse, OVA-23-3, has already been established (Sato et al., 1994, Eur. J. Immunol., vol.24, p.1512). Spleen cells of OVA-23-3 mice should be cultured in the presence of OV A323-339 peptide, antigen presenting cells, Inuichi Leukin 2, Inuichi Leukin 12, and anti-inu Leukin 4 monoclonal antibody.
- polyA (+) RNA was prepared from lymphocytes differentiated into TM type and Th2 type by the method of Ohta et al. Using Fast Track (Invitrogen). Double-stranded cDNA was synthesized using a random hexamer of the Superscript Choice System (GIBC0 BRL). After blunt-ending the cDNA, BstXI adapter 1 (Invitrogen) was added, and a cDNA of 400 bp or more was fractionated using a SizeSep 400 Spun Column (Pharmacia). Separately BstXI (Takara Shuzo) and BAP treated pMX GM (-) V- (see Japanese Patent Application No.
- Hei 9-324912 mpl M 2 and linked by ligated with T4 DNA ligase after mixed-. This was introduced into E. coli DH10B (GIBCO BRL) by electroporation using Gene Pulser (Bio Rad) to construct a cDNA library.
- Plasmids extracted from the recombinant E. coli were purified using a JETstar column (GEN0M ED). Plasmid cDNA library was transfected into packaging cell B0SC23 (Proc. Natl. Acad. Sci. USA, vol. 90: 8392-8396, brief) using LipofectAMINE (LIFE TECHNOLOGIES).
- B0SC23 10% Inoculated in 6 cm dish (Corning) with Dulbecco's Modified Eagel Medium (D MEM, tIFE TECHNOLOGIES) containing fetal serum (FCS, JRH BIOSCIENCES), washed 16 hours later, washed with DMEM, and diluted with 200 1 DMEM first 18 1 LipofectAMINE and 3 g of plasmid diluted with 200 H DMEM were mixed and left at room temperature for 15 minutes, and 1.6 ml of DMEM was mixed and added to the cells. Five hours later, 2 ml of DMEM containing 20% FCS was added, and the cells were cultured for 19 hours.
- D MEM Dulbecco's Modified Eagel Medium
- FCS fetal serum
- FCS JRH BIOSCIENCES
- IL-3 mouse interleukin-3
- lO jug / ml hexadiraethrine bromide were added, and Ba / F3 cells were suspended and infected. Twenty-four hours after the infection, the cells were washed three times with a phosphate buffer, and cultured with RPMI1640 containing 10% FCS.
- Chromosomal DNA was extracted from the clones grown in the absence of IL-3, and primers (5, -gggggtggaccatcctcta-3so sequence numbers: 5, and 5, -cgcgcagctgtaaacggtag-3, / SEQ ID NO: 6) was used to perform PCR to recover a cDNA fragment.
- PCR was performed on a reaction solution containing 500 ng chromosomal DNA, 500 pM each primer, 2.5 units of TaKaRa LA Taq (Takara Shuzo), 2.5 mM MgCl 2 , 0.3 mM dNTPs, and buffer attached to the enzyme under the following conditions using the GeneAmpPCR System 2400. .
- a Th2-type lymphocyte cDNA library was synthesized with an oligo dT primer, and the above cDNA fragment was screened with a probe.
- double-stranded cDNA was synthesized from Th2-type lymphocyte polyA (+) RNA using the oligo dT primer of the Superscript Choice System (GIBC0 BRL).
- Bs after cDNA blunting A tXI adapter (Invitrogen) was added, and a cDNA of 400 bp or more was fractionated using a SizeSep 400 Spun Column (Pharmacia).
- 0.1 ⁇ g of the DNA fragment previously obtained by the SST method was converted into type ⁇ into its internal primer (50 pmoles) (22115; 5, -ggtgatgtcacagtcgtctgccatg-3, / SEQ ID NO: 7, and 22113; 5, -acggtccgcaggagtagcagtaa- 3, / SEQ ID NO: 8), 2.5 mM MgCl 2 , 0.2 mM dATP, dGTP, dCTP, O.
- Plasmid was extracted from the obtained colony, and the recA reaction was repeated again to select a recombinant on a medium containing ampicillin. Colony PCR was performed using 221L5 and 221L3 under the same conditions. Plasmid was extracted from a positive colony having a band of about 400 bases, and the base sequence of the inserted cDNA was determined.
- the other (referred to as “215S”) consists of 804 bases (SEQ ID NO: 3) and has an open reading frame (positions 98 to 661) encoding 188 amino acid residues (SEQ ID NO: 4). . Up to 175 amino acids below the signal sequence are completely homologous to 215 L, but lack the site corresponding to the transmembrane domain and below, suggesting that it is a soluble form commonly found in various cytokine receptors.
- a mouse multi-tissue northern plot (Clontech's Laboratories) was probed with a 407 bp DEL-1 specific PCR fragment prepared using the primer set described above. Plot in 50% formamide, 5 x SS 1% sodium dodecyl sulfate (SDS), 6 x Denhardt's reagent, and 100 / g / ml salmon sperm DNA was hybridized overnight at 42 ° C. with a P-labeled random priming probe, washed at 55 ° C. in 0, lx SSt, 0.1% SDS and then exposed to X-ray film.
- SDS sodium dodecyl sulfate
- RNA samples (3 ⁇ g) prepared from various mouse cell lines using the Fast Track 2.0 Kit (Invitrogen) were electrophoresed on a 1% agarose formamide gel. Separated and transferred to Hybond N + (Amersham) Nylon Fill Yuichi. Hybridization was carried out using the above-mentioned probe, followed by washing.
- the present inventors first overexpressed Deltal in Ba / F3 cells that proliferated or survived in response to IL-3 or IL-4, respectively. However, Ba / F3 response to these cytokines did not increase when Deal was overexpressed.
- these cytokines do not induce tyrosine phosphorylation of Delta Flag in Ba / F3 cells overexpressing Deltal, which indicates that Deltal is not involved in IL-3 and IL-4 signaling (Data not shown).
- cytoplasmic domain of Deltal A chimeric receptor between Deltal and hE POR or hMPL was constructed to investigate the effect of homodimer formation of the cytoplasmic domain of Deltal.
- Deltal membrane proximal region including box 1
- EDER chimeras were generated by replacing the membrane proximal region of hEPOR with the membrane proximal region of Deltal.
- chimeric receptors were constructed as follows. To express wild-type hEPO, full-length hEPOR (Noguchi CT. Et al., Blood 78: 2548 (1991)) was cloned into the EcoRI and NotI sites of the pMX-puro retroviral vector (Onishi M. et al., Mol. Cell. Biol. 18: 3871 (1998)). When constructing the chimeric receptors hEPOR-DeltalR and hMPL-DeltalR, an EcoRI site was inserted between the extracellular and transmembrane domains of each cDNA.
- cytoplasmic domain of Deltal cDNA obtained by PCR using the high-precision DNA polymerase Pyrobest (Yukara) was cloned into pMX-puro at the 5, -EcoRI and 3, -Notl sites,
- the EcoRI fragment containing the extracellular domain of hEPOR or hMPL was cloned into the 5'-EcoRI site (FIG. 5).
- the primers were: 5,1-aaaagaattcccgcccctcctgcccctgggc-3, / 3 ⁇ 43 ⁇ J3 ⁇ 4 ⁇ : 9 and 5,1-gctggc ggccgcacctgcaggcgc-3, / SEQ ID NO: 10 Using.
- 5 -aaagaattcgggggctgtatcatggac-3 '/ sequence number: 11 and 5, -aaagaa cggggtccaggtcgctagg-3, / sequence number: 12 were used as primers.
- an Hpal site was inserted between the extracellular domain and the transmembrane domain, and an Xhol site was inserted downstream of the tributophan residue conserved in the cytoplasmic domain of hEPOR ( Figure 5).
- the Box 1 region of the Deltal cDNA was cloned into the EcoRI and NotI sites of pMX-puro.
- the cytoplasmic domain of hEPOR was then cloned into EcoRI and NotI sites and Was cloned into EcoRI and Hpal sites.
- the primers were: ⁇ 5, -aaactcgagctgtaccagaatgatggc-3 '/ rooster [J number: 17 and 5, -aaagcggccgc tcacttgtcagagcaagccacatagct -3 ', 5, -aaagcggccgctcagtcatcagagcaagccacata get-3, ⁇ 5, -aaagcggccgctcagtccttagagcaagccacatagct-3' ⁇ and 5, -aaagcgg ccgctcagtaatcagagcaagccacatagct-3, / SEQ ID NOS: 18 to 21 were used.
- the resulting expression plasmid was introduced into FDC-PI by retroviral infection as described (Kitamura T. et al., Proc. Natl. Acad. Sci. USA 92: 9146 (1995)). Infected cell lines were selected in the presence of 1 ⁇ g / ml pure mouth mycin (Sigma) to obtain stable transfectants.
- FDC-P1 cells expressing parental FDC-P1 and hEP0R, hEPOR-DeltalR, E thigh, and hMPL-DetaltalR were lng / ml mIL-3, 2U / ml hEPO, 2U / ml hEPO ⁇ 2U / ml hEPO , And 100 ng / ml hTPO, and the cells were counted at the indicated times.
- FDC-P1 cells expressing EDER grew efficiently in response to hEPO (Fig. 6), while expressing the chimeric receptors hEPO-DeltalR or hMPL-DeltalR. FDC-P1 cells did not transmit proliferative signals in response to EP0 or TP0, respectively.
- Phosphorylation of JAK kinase by EDE chimeric receptor Whether or not the chimeric receptor EDER mediates hEPO-dependent activation of JAK kinase was determined by immunoprecipitation with an antibody against JAK2, and an antibody against phosphotyrosine (monoclonal). Attachment was performed by Western blotting using antibody 4G10). After stripping, analysis was performed again using an anti-JAK antibody. A similar analysis was performed using anti-JAK1, anti-JAK3 and anti-Tyk-2 antibodies.
- Immunoprecipitation and Western blotting were performed as follows. Cell lysis buffer and dissolved in (50 mM Tris-HCl (pH 7.5), 150 mM NaCl , 1% tri-ton X- 10 0, l mM EDTA, 0.2 mM Na 3 V0 4, 2 mM PMSF) therein. Lysates were cleaned of debris by centrifugation at 12,000 xg for 40 minutes, and the supernatant was incubated with the antibody for 2 hours at 4 ° C.
- the immune complexes are precipitated with Protein A Sepharose (Pharmacia), washed with lysis buffer, and the proteins are buffered for SDS-PAGE using the same buffer (62.5 mM Tris-HCl (pH 6.8), 2% SDS, 10% It was eluted with glycerol, 5% 2-mercaptoethanol, 0.02% promophenol.
- the eluted protein was electrophoresed on an 8-16% gradient gel (Gradiva, Northride, Australia).
- the membrane was examined using antibody or streptavidin / horseradish / peroxidase (HRP0) (Vector Laboratories) as a probe, and visualized using an enhanced chemiluminescence detection system (Amersham) according to the manufacturer's manual.
- a DeUaut Flag was designed by fusing a Flag sequence (DYKDDDDK / SEQ ID NO: 24) with the C-terminus of Deltal.
- the Delta-Flag PCR fragment was cloned into the pMX-puro retrovirus vector at the 5, -EcoRI and 3, -NotI sites.
- the constructed vector was introduced into Ba / F3 cells by retroviral infection.
- Ba / F3 cells and parental cells transduced with the evening-eared Deal are surface labeled with sulfo-NHS-LC biotin, cell lysates are precipitated with anti-Flag antibody, and then blocked with streptavidin-HRPO. Ting was performed (Fig. 8).
- the expressed Deltal protein had a molecular weight of 50 kDa, which was greater than the calculated molecular weight of 37791 daltons. This difference is probably due to the sugar moiety binding to some of the two putative N-linked glycosylation sites found in the extracellular domain of Deal.
- Pro part is 407 bp fragment of mouse cDNA, using a random priming labeling kit (Stratagene), Non 32 P] labeled by dCTP; washing final stringency diene Sea 1.0 x SSCP, 0.1 % SDS, performed at 65 ° C.
- C57BL / 6J and M. spretus DNA are digested with several enzymes to obtain informative restriction fragment length polymorphisms (RFLPs) using the mouse cDNA Deltal probe. Analysis by Southern plot hybridization was performed. 8.7 kb or 11.0 kb Seal fragments were detected in C57BL / 6J DNA or M. spretus DNA, respectively. The presence or absence of the 11.0 kb Sea I M. spread-specific fragment was followed in backcrossed mice.
- the recombination frequency [the standard error of the distance of the gene expressed in centiMorgans (cM)] was as follows: “Central Meir-Fgf5—2.7 ⁇ 1.3— [Dmpl ⁇ Deltal, Gfil ] —2.8 ⁇ 1.4—Crybb2 ”. In 136 commonly typed mice, no recombination was detected between Dmpl and Deltal, or mouse 154 ⁇ between Deal and Gfil, indicating that the two loci in each pair were This suggests that they lie within the range of 2.2 and 1.9 cM, respectively (95% CI upper limit). Industrial applicability
- novel cytokine receptor-like proteins which are considered to belong to the cytokine receptor superamylie and their genes are provided.
- a large number of molecules with different functions have been identified in the cytokine family superfamily, and it is known that all of them play an important role mainly in the immune system in vivo. Therefore, the protein or gene of the present invention can be used as a useful tool for purification and cloning of new factors involved in the immunological differentiation function, and also for screening of drug candidate compounds.
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Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AU25741/00A AU2574100A (en) | 1999-02-19 | 2000-02-18 | Novel cytokine recfptor-like protein |
| EP00904039A EP1152059A4 (en) | 1999-02-19 | 2000-02-18 | NOVEL CYTOKINE RECEPTOR TYPE PROTEIN |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11/41936 | 1999-02-19 | ||
| JP4193699 | 1999-02-19 |
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| WO2000049148A1 true WO2000049148A1 (fr) | 2000-08-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP2000/000939 Ceased WO2000049148A1 (fr) | 1999-02-19 | 2000-02-18 | Nouvelle proteine de type recepteur de cytokines |
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| Country | Link |
|---|---|
| EP (1) | EP1152059A4 (ja) |
| AU (1) | AU2574100A (ja) |
| WO (1) | WO2000049148A1 (ja) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2000068381A1 (en) * | 1999-05-11 | 2000-11-16 | Zymogenetics, Inc. | Cytokine receptor mouse zcytor10 |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5378808A (en) * | 1989-02-03 | 1995-01-03 | Genetics Institute, Inc. | Recombinant erythropoietin receptor protein |
| WO1999047538A1 (en) * | 1998-03-19 | 1999-09-23 | Human Genome Sciences, Inc. | Cytokine receptor common gamma chain like |
-
2000
- 2000-02-18 WO PCT/JP2000/000939 patent/WO2000049148A1/ja not_active Ceased
- 2000-02-18 AU AU25741/00A patent/AU2574100A/en not_active Abandoned
- 2000-02-18 EP EP00904039A patent/EP1152059A4/en not_active Withdrawn
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5378808A (en) * | 1989-02-03 | 1995-01-03 | Genetics Institute, Inc. | Recombinant erythropoietin receptor protein |
| WO1999047538A1 (en) * | 1998-03-19 | 1999-09-23 | Human Genome Sciences, Inc. | Cytokine receptor common gamma chain like |
Non-Patent Citations (4)
| Title |
|---|
| CONSTANCE TOM NOGUCHI ET. AL.: "Cloning of the human erythropoietin receptor gene.", BLOOD, vol. 78, no. 10, 15 November 1991 (1991-11-15), pages 2548 - 2556, XP002928876 * |
| KAREN EHRENMAN ET. AL.: "The erythropoietin receptor gene: Cloning and identification of multiple transcripts in an Erythroid Cell Line OCIMI.", EXPERIMENTAL HEMATOLOGY, vol. 19, no. 9, October 1991 (1991-10-01), pages 973 - 977, XP002928875 * |
| SATORU KUMAKI ET. AL.: "Cloning of the mouse inteleukin 2 receptor gamma chain: demonstration of functional differences between the mouse and human receptors.", BIOCHEMICAL AND BIOPHYSICAL RESEARCH COMMUNICATION, vol. 193, no. 1, 28 May 1993 (1993-05-28), pages 356 - 363, XP002828874 * |
| See also references of EP1152059A4 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2000068381A1 (en) * | 1999-05-11 | 2000-11-16 | Zymogenetics, Inc. | Cytokine receptor mouse zcytor10 |
Also Published As
| Publication number | Publication date |
|---|---|
| EP1152059A1 (en) | 2001-11-07 |
| EP1152059A4 (en) | 2005-06-08 |
| AU2574100A (en) | 2000-09-04 |
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