WO1999047170A1 - Agents prophylactiques ou therapeutiques pour affections intestinales inflammatoires renfermant, comme ingredient actif, des antagonistes de il-6 - Google Patents
Agents prophylactiques ou therapeutiques pour affections intestinales inflammatoires renfermant, comme ingredient actif, des antagonistes de il-6 Download PDFInfo
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- WO1999047170A1 WO1999047170A1 PCT/JP1999/001298 JP9901298W WO9947170A1 WO 1999047170 A1 WO1999047170 A1 WO 1999047170A1 JP 9901298 W JP9901298 W JP 9901298W WO 9947170 A1 WO9947170 A1 WO 9947170A1
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Classifications
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K45/00—Medicinal preparations containing active ingredients not provided for in groups A61K31/00 - A61K41/00
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07K—PEPTIDES
- C07K16/00—Immunoglobulins [IGs], e.g. monoclonal or polyclonal antibodies
- C07K16/18—Immunoglobulins [IGs], e.g. monoclonal or polyclonal antibodies against material from animals or humans
- C07K16/28—Immunoglobulins [IGs], e.g. monoclonal or polyclonal antibodies against material from animals or humans against receptors, cell surface antigens or cell surface determinants
- C07K16/2866—Immunoglobulins [IGs], e.g. monoclonal or polyclonal antibodies against material from animals or humans against receptors, cell surface antigens or cell surface determinants against receptors for cytokines, lymphokines, interferons
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P1/00—Drugs for disorders of the alimentary tract or the digestive system
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P1/00—Drugs for disorders of the alimentary tract or the digestive system
- A61P1/04—Drugs for disorders of the alimentary tract or the digestive system for ulcers, gastritis or reflux esophagitis, e.g. antacids, inhibitors of acid secretion, mucosal protectants
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P1/00—Drugs for disorders of the alimentary tract or the digestive system
- A61P1/12—Antidiarrhoeals
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P37/00—Drugs for immunological or allergic disorders
- A61P37/02—Immunomodulators
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K39/00—Medicinal preparations containing antigens or antibodies
- A61K2039/505—Medicinal preparations containing antigens or antibodies comprising antibodies
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K38/00—Medicinal preparations containing peptides
Definitions
- the present invention relates to a prophylactic or therapeutic agent for inflammatory bowel disease, comprising interloquin-6 (IL-6) antagonist as an active ingredient.
- the present invention also relates to a prophylactic or therapeutic agent for Crohn's disease or ulcerative colitis, comprising 1L-6 antagonist as an active ingredient.
- BSF2 B-cell stimulating factor 2
- IL-6 was discovered as a differentiation factor involved in the activation of B lymphocyte cells (Hirano, T. et al., Nature (1986) 324, 73-76), and subsequently It has been clarified that this is a multifunctional site that affects cell function (Akira, S. et al., Adv. In Immunology (1993) 54, 1-78). I-6 has been reported to induce maturation of T lymphocyte cells (Lotz, M. et al., J. Exp. Med. (1988) 167, 1253-1258).
- IL-6 transmits its biological activity on cells via two proteins.
- One is the I6 receptor for a ligand-binding protein with a molecular weight of about 80 kD to which I-6 binds (Taga, T. et al., J. Exp. Med. (1987) 166). , 967-981, Yamasaki, K. et al., Science (1987) 241, 825-82 8).
- the IL-6 receptor exists as a soluble IL-6 receptor mainly consisting of its extracellular region, in addition to the membrane-bound type expressed through the cell membrane and expressed on the cell membrane.
- the other is gpl30, a membrane protein with a molecular weight of approximately 130 kD involved in non-ligand-binding signal transduction.
- I-6 and -6 receptors are IL-6Z!
- 1L-6 antagonist is a substance that inhibits the transmission of IL-6 biological activity.
- antibodies against I-6 anti-IL-6 antibody
- antibodies against I-6 receptor anti-IL-6 receptor antibody
- antibodies against gpl30 anti-gpl30 antibody
- I-6 variants , IL-6 or 1L-6 receptor partial peptides and the like are known.
- IBD Inflammatory bowel disease
- monocytes and lymphocytes accumulated at the site of the lesion are thought to be involved in mucosal damage, and inflammatory mediators produced from these cells, especially cytodynamics (I L13, TNF, IL-6, etc.).
- 1 L-6 is associated with disease activity.
- Inflammatory mediators other than 6 have IL-1 / 3 production similar to 1L-6 Have been shown to correlate with disease activity. On the other hand, the production of TNF ⁇ is not always correlated, and the production tends to be high even in the state of low activity (Reinecker, H.-et al., Clin. Exp. (1993) 94, 174-181, Reimund, J. -M. Et al., Gut (1996) 39, 684-689).
- the present invention aims to provide a prophylactic or therapeutic agent for inflammatory bowel disease that does not have the above-mentioned disadvantages. That is, the present invention provides (1) a prophylactic or therapeutic agent for inflammatory bowel disease containing 1 L-6 antagonist as an active ingredient.
- the present invention also provides (2) a prophylactic or therapeutic agent for inflammatory bowel disease, comprising an antibody against 1L-6 receptor as an active ingredient.
- the present invention also provides (3) a prophylactic or therapeutic agent for inflammatory bowel disease comprising a monoclonal antibody against IL-6 receptor as an active ingredient.
- the present invention also provides (4) human It is intended to provide a prophylactic or therapeutic agent for inflammatory bowel disease, comprising a monoclonal antibody against IL-6 receptor as an active ingredient.
- Monoclonal antibodies to the human I6 receptor are preferably PM-1 antibodies.
- the present invention also provides (5) a prophylactic or therapeutic agent for inflammatory bowel disease comprising a monoclonal antibody against mouse I-6 receptor as an active ingredient.
- the monoclonal antibody against mouse IL-6 receptor is preferably the MR16-1 antibody.
- the present invention also provides (6) a prophylactic or therapeutic agent for inflammatory bowel disease, which comprises a recombinant antibody against IL-6 receptor as an active ingredient.
- a prophylactic or therapeutic agent for inflammatory bowel disease which comprises a recombinant antibody against IL-6 receptor as an active ingredient.
- the present invention also provides (7) a prophylactic or therapeutic agent for inflammatory bowel disease, comprising as an active ingredient a chimeric antibody or humanized antibody against IL-6 receptor.
- the present invention also provides (8) a prophylactic or therapeutic agent for inflammatory bowel disease, comprising a humanized PM-1 antibody as an active ingredient.
- the present invention also provides (9) an agent for preventing or treating Crohn's disease or ulcerative colitis, comprising, as an active ingredient, the 1-antagonist according to any one of (1) to (8). I will provide a.
- the present invention also provides (10) an agent for suppressing weight loss in inflammatory bowel disease, comprising the -6 antagonist according to any one of (1) to (8) as an active ingredient.
- the present invention further provides (11) an agent for suppressing weight loss in inflammatory bowel disease, comprising as an active ingredient the antibody against the IL-6 receptor according to any of (3) to (8).
- an agent for suppressing weight loss in inflammatory bowel disease comprising as an active ingredient the antibody against the IL-6 receptor according to any of (3) to (8).
- the IL6 antagonist used in the present invention may be of any origin, type and shape as long as it exhibits a preventive or therapeutic effect on inflammatory bowel disease or an effect of suppressing weight loss in inflammatory bowel disease.
- IL-6 antagonist is a substance that blocks signal transduction by I6 and inhibits the biological activity of IL-6.
- the 1L-6 antagonist is a substance preferably having an inhibitory action on the binding of any of IL-6, 1L-6 receptor and gpl30.
- the anti-IL-6 antibody used in the present invention can be obtained as a polyclonal or monoclonal antibody using known means.
- a monoclonal antibody derived from a mammal is particularly preferable.
- mammalian-derived monoclonal antibodies include those produced by hybridomas and those produced by a host transformed with an expression vector containing an antibody gene by genetic engineering techniques.
- this antibody inhibits the binding of IL-6 to the IL-6 receptor and blocks the transmission of 1L-6 biological activity into cells.
- Such antibodies include MH166 (Matsuda, T. et al., Eur. J. Immunol. (1988) 18, 951-956) and SK2 antibody (Sato, K. et al., 21st Japan General Meeting of the Society of Immunology, Scientific Records (1991) 21, 166).
- a hybridoma producing an anti-I-6 antibody can be prepared using a known technique as follows. That is, IL-6 is used as a sensitizing antigen, and immunized with this according to a normal immunization method. The obtained immunized cells are fused with a known parent cell by a normal cell fusion method, and a normal screw is used. The antibody can be produced by screening monoclonal antibody-producing cells by the screening method.
- an anti-1L-6 antibody may be prepared as follows.
- human 1L-6 used as a sensitizing antigen for obtaining antibodies can be obtained from Eur. J. Biochem (1987) 168, 543-550, J. Immunol. (1988) 140, 1534-1541, or Agr. Biol. Chem. (1990) 54, 2685-2688, which is obtained by using a Z amino acid sequence of the IL-6 gene.
- the target IL-6 protein After inserting the gene sequence of IL-6 into a known expression vector system and transforming an appropriate host cell, the target IL-6 protein is known from the host cell or the culture supernatant.
- the purified -6 protein may be used as a sensitizing antigen. Further, a fusion protein of the IL-6 protein and another protein may be used as the sensitizing antigen.
- the anti-IL-6 receptor antibody used in the present invention can be obtained as a polyclonal or monoclonal antibody using known means.
- a monoclonal antibody derived from a mammal is particularly preferable.
- Monoclonal antibodies derived from mammals include those produced in hybridomas and those produced in hosts transformed with expression vectors containing the antibody gene by genetic engineering techniques. This antibody binds to the IL-6 receptor Inhibits the binding of IL-6 to the iL-6 receptor and blocks the transmission of IL-6 biological activity into cells.
- Such antibodies include the MR161 antibody (Tamura, T. et al. Proc. Natl. Acad. Sci. USA (1993) 90, 11924-11928) and the PM-1 antibody (Hirata, Y. et al., J. Immunol. (1989) 143, 2900-2906), AUK12-20 antibody, AUK64-7 antibody or AUK146-15 antibody (International Patent Application Publication No. WO9219759).
- a particularly preferred antibody is the PM-1 antibody.
- the PM-1 antibody-producing hybridoma cell line was designated as PM-1 by the Institute of Biotechnology, Industrial Science and Technology (Ichigo, 1-3-1, Tsukuba-Higashi, Ibaraki Prefecture) in July 1990. On October 10, it was deposited internationally under FERM BP 2998 under the Budapest Treaty.
- the MR16-1 antibody-producing hybridoma cell line was named Rat-mouse hybridoma MR16-1 at the Institute of Biotechnology, Industrial Science and Technology (Tsukuba-Higashi 1-3-1-3, Ibaraki Prefecture). On March 13, 1997, it was deposited internationally under the Budapest Treaty as FERM BP-5875.
- a hybridoma producing an anti-IL-6 receptor monoclonal antibody can be basically produced using a known technique as follows. That is, the IL-6 receptor is used as a sensitizing antigen, and immunization is carried out according to a normal immunization method. The obtained immune cells are fused with a known parent cell by a normal cell fusion method. It can be produced by screening monoclonal antibody-producing cells by a conventional screening method.
- an anti-IL-6 receptor antibody may be prepared as follows.
- human 1 receptor 6 used as a sensitizing antigen for obtaining an antibody is described in European Patent Application Publication No. EP 325474
- mouse IL-6 receptor is disclosed in Japanese Patent Application Publication No. 3-155579.
- Disclosed-6 receptor genes It can be obtained by using the amino acid sequence.
- soluble I6 receptor protein expressed on cell membrane and detached from cell membrane (soluble I6 receptor) (Yasukawa,. Et al., J. Biochem. (1990) 108, 673 -676). Soluble I 6 receptor antibody is bound to the cell membrane-consists essentially of the extracellular domain of the 6 receptor, with a lack of transmembrane or transmembrane and intracellular domains Membrane-bound-different from 6 receptors.
- the IL-6 receptor protein any IL-6 receptor may be used as long as it can be used as a sensitizing antigen for producing the anti-IL-6 receptor antibody used in the present invention.
- the target IL-6 receptor protein is extracted from the host cell or the culture supernatant. May be purified by a known method, and the purified 1L-6 receptor protein may be used as a sensitizing antigen. Alternatively, cells expressing the I-6 receptor or a fusion protein of the -6 receptor protein with another protein may be used as the sensitizing antigen.
- Escherichia coli (E. coli) containing the plasmid plBIBSF2R containing the cDNA coding for the human IL-6 receptor was released on January 9, 1989 It has been deposited with the Technical Research Institute as HB101-piB! BSF2R under the Budapest Treaty under the accession number FERM BP-2232.
- the anti-gpl30 antibody used in the present invention can be obtained as a polyclonal or monoclonal antibody using known means.
- a monoclonal antibody derived from a mammal is particularly preferable.
- Monoclonal antibodies derived from mammals include those produced by hybridomas and those produced by a host transformed with an expression vector containing an antibody gene by genetic engineering techniques. There is something. This antibody inhibits the binding of the 1L-6 / I or 6 receptor complex to gpl30 by binding to gpl30! Blocks the transmission of biological activity of Re6 into cells.
- Examples of such antibodies include the AM64 antibody (JP-A-3-219894), the 4B11 antibody and the 2H4 antibody (US 5571513), the B-S12 antibody and the B-P8 antibody (JP-A-8-291199), and the like. .
- An anti-gpl30 monoclonal antibody-producing hybridoma can be basically produced using a known technique as follows. That is, gpl30 is used as a sensitizing antigen, and is immunized according to a usual immunization method, and the obtained immune cells are fused with a known parent cell by a normal cell fusion method, and It can be produced by screening monoclonal antibody-producing cells by the screening method.
- a monoclonal antibody may be prepared as follows.
- gpl30 used as a sensitizing antigen for obtaining an antibody can be obtained by using the zamino acid sequence of the gpl30 gene disclosed in European Patent Application Publication No. EP 411946.
- the desired gpl30 protein is isolated from the host cell or culture supernatant by a known method. After purification, the purified gpl30 receptor protein may be used as a sensitizing antigen. Alternatively, cells expressing gpl30 or a fusion protein of gpl30 protein with another protein may be used as the sensitizing antigen.
- the mammal to be immunized with the sensitizing antigen is not particularly limited, but is preferably selected in consideration of compatibility with the parent cell used for cell fusion. Rodents, such as mice, rats, and hamsters are used.
- a known method is used. You.
- a sensitizing antigen is administered intraperitoneally or in a mammal.
- the sensitizing antigen is diluted and suspended in an appropriate amount with PBS (Phosphate-Buffered Saline) or physiological saline, and then suspended in a normal adjuvant, for example, Freund's complete adjuvant, if desired. It is preferable to mix an appropriate amount of the mixture and emulsify and administer the compound to a mammal several times every 4 to 21 days.
- a suitable carrier can be used at the time of immunization of the sensitizing antigen.
- immune cells are removed from the mammal and subjected to cell fusion.
- Preferred immune cells to be subjected to cell fusion include spleen cells in particular.
- Mammalian myeloma cells as the other parent cells fused with the immune cells are already known in various cell lines, for example, P3X63Ag8.653 (Kearney, JF et al. J. Immunol. Immnol. (1979) 123, 1548-1550), P3X63Ag8U.1 (Current Topics in Microbiology and Immunology (1978) 81, 1-7), NS-1 (Kohler. G. and Milstein, C. Eur. J. Immunol. (1976) 6, 511-519), MPC-11 (Margulies. DH et al., Cell (1976) 8, 405-415), SP2 / 0 (Shulman, M.
- the cell fusion of the immune cells and myeloma cells is basically performed by a known method, for example, the method of Milstein et al. (Kohler. G. and Milstein,
- the cell fusion is performed, for example, by the presence of a cell fusion promoter. It is carried out in a normal nutrient broth below.
- fusion promoters include
- Polyethylene glycol (PEG), Sendai virus (HVJ), etc. may be used. If necessary, an adjuvant such as dimethyl sulfoxide may be added to enhance the fusion efficiency. You can also.
- the ratio of the use of the immune cells to the myeloma cells is, for example, preferably 10 times the number of the immune cells to the myeloma cells.
- the culture medium used for the cell fusion for example, an RPMII 640 culture medium, a MEM culture medium suitable for the growth of the myeloma cell line, and other ordinary culture mediums used for this kind of cell culture are used. It is possible, and a serum supplement such as fetal calf serum (FCS) can be used in combination.
- FCS fetal calf serum
- a predetermined amount of the immune cells and the myeloma cells are mixed well in the culture medium, and a PEG solution previously heated to about 37 ° C., for example, a PEG solution having an average molecular weight of about 1000 to 6000 is used.
- the solution is usually added at a concentration of 30-60% (w / v) and mixed to form the desired fused cells (hybridoma).
- a cell fusion agent or the like that is not preferable for the growth of the hybridoma can be removed.
- the hybridoma is selected by culturing it in an ordinary selective culture solution, for example, a HAT culture solution (a culture solution containing hypoxanthine, aminobuterin and thymidine). Culture in the HAT culture medium is continued for a period of time sufficient to kill cells other than the target hybridoma (non-fused cells), usually several days to several weeks. Then, screening and cloning of the hybridoma producing the desired antibody are performed by the usual limiting dilution method.
- a HAT culture solution a culture solution containing hypoxanthine, aminobuterin and thymidine.
- a human lymphocyte is sensitized in vitro with a desired antigen protein or an antigen-expressing cell, and a sensitized B lymphocyte is immunized.
- Human Eroma cells eg U266 Can be obtained to obtain a desired human antibody having a binding activity to a desired antigen or an antigen-expressing cell (see Japanese Patent Publication No. 1559878).
- an antigen or an antigen-expressing cell may be administered to a transgenic animal having a human antibody gene repertoire to obtain a desired human antibody according to the method described above. Good (see International Patent Application Publication Nos. WO93 / 12227, WO92 / 03918, WO94 / 02602, WO94 / 25585, WO96 / 34096, WO96 / 33735).
- Hybridomas producing monoclonal antibodies produced in this way can be subcultured in ordinary culture medium and can be stored for a long period in liquid nitrogen. It is.
- a method of culturing the hybridoma according to an ordinary method and obtaining the culture supernatant, or transferring the hybridoma to a mammal compatible therewith A method of administering the substance, growing it, and obtaining it as ascites is employed.
- the former method is suitable for obtaining high-purity antibodies, while the latter method is suitable for mass production of antibodies.
- an anti-1L-6 receptor antibody-producing hybridoma can be performed by the method disclosed in JP-A-3-139293.
- JP-A-3-139293 At the Institute of Life Science and Industrial Technology (I 1-3, Higashi 1-3-1, Tsukuba, Ibaraki Prefecture), on July 10, 2002, FERM BP-2998 was established based on the Budapest Treaty.
- the deposited PM-1 antibody-producing hybridoma is intraperitoneally injected into a BALB / c mouse to obtain ascites, and the PM-1 antibody is purified from the ascites.
- the PM1 antibody can be purified from the culture supernatant.
- an antibody gene is cloned from a hybridoma, incorporated into an appropriate vector, introduced into a host, and produced using a gene recombination technique. Recombinant antibodies can be used (see, for example, Borrebaeck CAK and Larrick JW THERAPEUTIC MONOCLONAL ANTIBODIES, Published in the United Kingdom by MACMILLAN PUBLISHERS LTD, 1990).
- mRNA encoding the variable (V) region of the antibody is isolated from cells producing the antibody of interest, for example, a hybridoma. Isolation of mRNA can be performed by known methods, for example, guanidine ultracentrifugation (Chirgwin, JM et al., Biochemistry (1979) 18, 5294-5299), AGPC method (Chomczynski, P. et al., Anal. Prepare total RNA using Biochem. (1987) 162, 156-159) and prepare mRNA using mRNA Purification Kit (Pharmacia). Also, mRNA can be directly prepared by using QuickPrep mRNA Purification Kit (Pharmacia).
- cDNA for the antibody V region is synthesized using reverse transcriptase.
- cDNA can be synthesized using the AMV Reverse Transcriptase First-strand cDNA Synthesis Kit or the like.
- AMV Reverse Transcriptase First-strand cDNA Synthesis Kit or the like.
- 5'-Ampli FINDER RACE Kit (Clontech) and 5'-RACE method using PCR (Frohman, MA et al., Pro Natl. Acad. Sci. USA (1988) 85, 8998-9002; Belyavsky, A. et al., Nucleic Acids Res. (1989) 17, 2919-2932) can be used. Purify the target DNA fragment from the obtained PCR product and ligate it to vector DNA.
- a recombinant vector is prepared from this, introduced into E. coli, etc., and colonies are selected to prepare a desired recombinant vector.
- the nucleotide sequence of the target DNA is confirmed by a known method, for example, the Doxy method.
- the DNA encoding the V region of the desired antibody is obtained, it is ligated to the DNA encoding the desired antibody constant region (C region) and incorporated into an expression vector.
- DNA encoding the V region of the antibody may be incorporated into an expression vector containing the DNA of the C region of the antibody.
- an antibody gene is incorporated into an expression vector so as to be expressed under the control of an expression control region, for example, an enhancer or a promoter, as described later.
- host cells can be transformed with this expression vector to express the antibody.
- artificial modification was carried out for the purpose of, for example, reducing the antigenicity to humans.
- Recombinant antibodies for example, chimeric antibodies and humanized antibodies can be used. These modified antibodies can be produced using known methods.
- the chimeric antibody is obtained by linking the DNA encoding the antibody V region obtained as described above to DNA encoding the human antibody C region, incorporating the DNA into an expression vector, and introducing the DNA into the host. It is obtained by manual production (see European Patent Application Publication No. EP 125023, International Patent Application Publication No. WO 92-19759). Using this known method, chimeric antibodies useful in the present invention can be obtained.
- plasmids containing DNA encoding the V region of the chimeric PM-1 antibody heavy chain and the heavy chain are named pPM-k3 and pPM-hi, respectively, and E. coli harboring these plasmids has been deposited with the National Collections of Industrial and Marine Bacteria Limited on February 11, 1991 as NC 1MB 40366 and NCIMB 40362, respectively, under the Budapest Treaty.
- the humanized antibody is also called a reshaped human antibody, and is used to obtain a complementarity determining region (CDR) of a non-human mammal, for example, a mouse antibody. It has been transplanted into the complementarity determining region of a human antibody, and its general gene recombination technique is also known (see European Patent Application Publication No. EP 125023, International Patent Application Publication No. WO 92-19759).
- a DNA sequence designed to link (FR; framework region) is synthesized by PCR from several oligonucleotides that have been prepared to have overlapping parts at the ends. The obtained DNA is ligated to DNA encoding the C region of the human antibody, then incorporated into an expression vector, and introduced into a host to produce it (European Patent Application Publication No. EP 239400, International Patent Application Publication No. WO 92-19759).
- Human antibody FRs linked via CDRs are selected so that the complementarity-determining region forms a favorable antigen-binding site. If necessary, amino acids in the framework region of the antibody variable region may be substituted so that the complementarity determining region of the reshaped human antibody forms an appropriate antigen-binding site (Sato, K. et al., Cancer Res. (1993) 53, 851-856).
- the human antibody C region is used for chimeric antibodies and humanized antibodies.
- the human antibody C region include Ca.
- Cyl, Cr2, Ca3, and Ca4 can be used.
- the C region of the human antibody may be modified.
- the humanized antibody is composed of the complementarity-determining region of an antibody derived from a mammal other than human, the framework region and the C region derived from the human antibody, and has a reduced antigenicity in the human body. It is useful as an antibody used in the present invention.
- humanized antibody used in the present invention is humanized antibody. (See International Patent Application Publication No. WO 92-19759).
- the antibody gene constructed as described above can be expressed and obtained by a known method.
- it is expressed by a useful useful promoter commonly used, an antibody gene to be expressed, a DNA having a polyA signal functionally linked to its 3 'downstream, or a vector containing it.
- the promoter / enhancer may be a human cytomegalovirus immediate early promoter / enhancer.
- Willsport motor such as INNOLES 40 (SV40) Z Enhancer HYTRONGE F ection factor 1 H
- a mammalian cell-derived promoter such as (HEF1a), may be used.
- promoters include the 1 acZ promoter and the araB promoter.
- the lacZ promoter the method of Ward et al. (Ward, ES et al., Nature (19 89) 341, 544-546; Ward, ES et al. FASEB J. (1992) 6, 2422-2427), when using the araB promoter, the method of Better et al. (Better, M. et al.
- the signal sequence for antibody secretion is pelB signal sequence (Lei, SP et al J. Bacteriol. (1987) 169, 4379-4383) should be used. After isolating the periplasmically produced antibody, the antibody structure is appropriately refolded and used (see, eg, W096 / 30394).
- the expression vector is used as a selection marker, such as the aminoglycoside phosphotransferase (APH) gene, thymidine kinase (TK) gene, and Escherichia coli xanthingua. It can contain the ninphospholibosyltransferase (Ecogpt) gene, the dihydrofolate reductase (dhfr) gene, and the like.
- APH aminoglycoside phosphotransferase
- TK thymidine kinase
- Escherichia coli xanthingua Escherichia coli xanthingua. It can contain the ninphospholibosyltransferase (Ecogpt) gene, the dihydrofolate reductase (dhfr) gene, and the like.
- Production systems for producing antibodies include in vitro and in vivo production systems.
- in vitro production systems include production systems using eukaryotic cells and production systems using prokaryotic cells.
- animal cells When eukaryotic cells are used, there are production systems using animal cells, plant cells, and fungal cells.
- animal cells include (1) mammalian cells, such as CH0, COS, myeloma, BHK (baby hamster kidney), Heshia, Vero, and (2) amphibian cells, such as African frog oocytes Cells or (3) insect cells such as sf9, sf21, and Tn5 are known.
- Plant cells include Nicotiana t aba cum-derived l8. Cells are known, and callus culture may be used.
- Fungal cells include yeast, for example, the genus Saccharomyces, for example, Saccharomyces' Saccharomyces cerevisiae, filamentous fungi, for example, the genus Aspergillus, for example, Aspergillus. Aspergillus niger is known. When prokaryotic cells are used, there are production systems using bacterial cells. Escherichia coli (E. coli) and Bacillus subtilis are known as bacterial cells.
- E. coli Escherichia coli
- Bacillus subtilis are known as bacterial cells.
- An antibody can be obtained by introducing a desired antibody gene into these cells by transformation and culturing the transformed cells in vitro. Culture is performed according to a known method. For example, DMEM, MEM, RPMI1640, IMDM can be used as a culture solution, and a serum supplement such as fetal calf serum (FCS) can be used in combination.
- FCS fetal calf serum
- antibodies may be produced in vivo by transferring cells into which the antibody gene has been introduced into the peritoneal cavity of animals.
- examples of in vivo production systems include production systems using animals and production systems using plants. When using animals, there are production systems using mammals and insects.
- a plant for example, tobacco can be used.
- An antibody gene is introduced into these animals or plants, and antibodies are produced and recovered in the animals or plants.
- an antibody gene is prepared in the middle of a gene encoding a protein that is uniquely produced in milk, such as goat / 3 casein, to prepare a fusion gene.
- a DNA fragment containing the fusion gene containing the antibody gene is injected into a goat embryo, and the embryo is introduced into a female goat.
- Transgenics born from goats that have received embryos A desired antibody is obtained from milk produced by a goat or its progeny. Hormones may be used in the transgenic fish as appropriate to increase the amount of milk containing the desired antibody produced from the transgenic fish. (Bbert, K.. Et al., Bio / Technology (1994) 12, 699-702) ⁇
- the baculovirus into which the target antibody gene is inserted is infected to the silkworms, and a desired antibody is obtained from the body fluid of the silkworms (Maeda, S. et al., Nature (1985)). 315, 592-594).
- the target antibody gene is introduced into a plant expression vector, for example, pMON530, and this vector is introduced into a vector such as Agrobacterium tumefa ciens.
- the bacteria are infected with tobacco, for example, Nicotiana tabacum, to obtain the desired antibody from the leaves of this tobacco (Julian, K. _C. Ma et al., Eur. J. Immunol. 1994) 24, 131-138) o
- the DNAs encoding the antibody heavy chain (H chain) or light chain (chain) are separately incorporated into an expression vector. May be co-transformed, or the DNA encoding the H and L chains may be incorporated into a single expression vector to transform the host (International Patent Application Publication Number W0 94-11523).
- the antibody used in the present invention may be an antibody fragment or a modified product thereof as long as it can be suitably used in the present invention.
- the antibody fragment include Fab, F (ab ') 2, Fv, and a single chain Fv (scFv) in which an Fv of an H chain and an L chain are linked by an appropriate linker.
- an antibody is treated with an enzyme such as papine or pepsin to generate an antibody fragment, or a gene encoding these antibody fragments is constructed and introduced into an expression vector.
- an enzyme such as papine or pepsin
- a suitable host cell To be expressed (for example, Co, MS et al., J. Immunol. (1994) 152, 2968-2976, Better, M. & Horwitz, AH Methods in Enzymology (1989) 178, 476-496, Plueckthun, A k Skerra, A. Methods in Enzymology (1989) 178, 476-496, Lamoy i, E., Methods in Enzymology (1989) 121, 652-663, Rousseaux, J. et al., Metho ds in Enzymology ( 1989) 121, 663-669, Bird, RE et al., TI BTECH (1991) 9, 132-137).
- scFv can be obtained by linking the H chain V region and L chain V region of the antibody.
- the H chain V region and the L chain V region are linked via a linker, preferably a peptide linker (Huston, J. S. et al. Proc. Natl. Acad. Sci. USA (1988) 85, 5879-5883).
- the H chain V region and L chain V region in the scFv may be derived from any of those described as the above antibodies.
- the peptide linker that connects the V regions for example, an arbitrary single-chain peptide consisting of amino acid residues 12 to 19 is used.
- the scFv-encoding DNA is a DNA encoding the H chain or the H chain V region of the antibody, and a DNA encoding the L chain or the L chain V region of the antibody.
- the DNA portion encoding the desired amino acid sequence is amplified by PCR using a pair of primers defining both ends, and then the peptide linker is further encoded. It can be obtained by amplifying DNA and its two ends by combining a pair of primers which are defined so as to be linked to H and L chains, respectively.
- DNAs encoding scFv are prepared, expression vectors containing them and hosts transformed with the expression vectors can be obtained in a conventional manner.
- scFv can be obtained using the host according to a conventional method.
- the fragments of these antibodies are obtained and expressed in the same manner as described above. And can be produced by the host.
- the “antibody” in the claims of the present application also includes fragments of these antibodies.
- an antibody conjugated with various molecules such as polyethylene glycol (PEG) can also be used.
- PEG polyethylene glycol
- the “antibody” referred to in the claims of the present application also includes these modified antibodies.
- Such a modified antibody can be obtained by chemically modifying the obtained antibody. These methods are already established in this field.
- the antibody produced and expressed as described above can be separated from the host inside and outside the cell and from the host and purified to homogeneity. Separation and purification of the antibody used in the present invention can be carried out by affinity chromatography.
- Columns used for affinity chromatography include, for example, protein A columns and protein G columns.
- Carriers used for protein A columns include, for example, Hyper D, P0 R0S and Sepharose FF.
- the separation and purification methods used for ordinary proteins may be used, and there is no limitation.
- a chromatogram other than the above-mentioned chromatographic, a filter, an ultrafiltration, a salting out, a dialysis and the like are appropriately selected and combined, and then used in the present invention.
- Antibodies can be separated and purified.
- Examples of the chromatography include ion exchange chromatography, hydrophobic chromatography, and gel filtration. These chromatographies can be applied to HPLC (High performance liquid chromatography). Alternatively, reverse phase HPLC (reverse phase HPLC) may be used.
- the concentration of the antibody obtained above can be measured by measuring absorbance or ELISA. That is, if the absorbance is measured, after appropriately diluting with PBS (-), measure the absorbance at 280 and add 1 mg / ml to 1. Calculate as 35 OD.
- the measurement can be performed as follows. That is, goat anti-human IgG (manufactured by TAG0) 100 1 diluted to 1 ⁇ g / ml with 0.1 M bicarbonate buffer (PH9.6) was added to a 96-well plate (manufactured by Nunc), and the mixture was incubated at 4 ° C. -Incubate and immobilize antibody.
- the 1L-6 variant used in the present invention is a substance that has an activity of binding to the IL-6 receptor and does not transmit the biological activity of 1-6. That is, the IL-6 variant competitively binds to IL-6 at the IL-6 receptor, but does not transmit the biological activity of IL-6, thereby blocking IL-6 signaling.
- the 1-6 variant is prepared by introducing a mutation by substituting the amino acid residue of the 1-6 amino acid sequence.
- 1L-6 which is the source of the IL-6 variant, may be of any origin, but is preferably human IL-6 in view of antigenicity and the like.
- the amino acid sequence of step 6 can be obtained by using a known molecular modeling program such as WHATiF (Vriend et al., J. Mol. Graphics (1990) 8, 52-56). This is performed by predicting the secondary structure of the amino acid residue and evaluating the effect on the entire amino acid residue to be further substituted.
- the vector containing the nucleotide sequence encoding the human IL-6 gene is used as a type II, and the amino acid is determined by a conventional PCR method. By introducing a mutation so that the amino acid is replaced A gene encoding the variant is obtained. This can be incorporated into an appropriate expression vector if necessary, and a modified IL-6 can be obtained according to the above-mentioned methods for expressing, producing and purifying a recombinant antibody.
- the 1L-6 partial peptide or IL-6 receptor partial peptide used in the present invention has a binding activity with IL-6 receptor or 1L-6, respectively! It does not transmit the biological activity of L-6. That is,! The partial 6-peptide or the partial IL-6 receptor peptide binds to the IL-6 receptor or 1L-6, and captures these to bind 1L-6 to the IL-6 receptor. Inhibits binding specifically. As a result, it does not transmit the biological activity of IL6, thereby blocking signal transduction by.
- the IL-6 partial peptide or the IL-6 receptor partial peptide is! It is a peptide consisting of a part or all of the amino acid sequence of the region involved in binding between IL-6 and IL-6 receptor in the amino acid sequence of L6 or 1L-6 receptor. Such peptides usually consist of 10 to 80, preferably 20 to 50, more preferably 20 to 40 amino acid residues.
- the IL-6 partial peptide or 1L-6 receptor partial peptide binds to IL-6 and Ile6 receptor in the amino acid sequence of 1L-6 or I-6 receptor.
- the region concerned is specified, and a part or all of the amino acid sequence can be prepared by a generally known method, for example, a genetic engineering method or a peptide synthesis method.
- a DNA sequence encoding a desired peptide is incorporated into an expression vector, and It can be obtained according to the expression, production and purification methods of the recombinant antibody.
- a method commonly used in peptide synthesis such as solid phase synthesis or liquid phase synthesis. Synthetic methods can be used.
- Solid phase peptide synthesis methods are broadly classified into the Boc method and the Fmoc method, depending on the type of protecting group used.
- a deprotection reaction and a cleavage reaction of the peptide chain from the support are performed.
- hydrogen fluoride or trifluormethansulfonic acid can be usually used in the Boc method, and TFA can be used in the Fmoc method.
- the Boc method for example, the above-mentioned protective peptide resin is treated in hydrogen fluoride in the presence of anisol. Next, the protecting group is eliminated and the peptide is cleaved from the support to recover the peptide. By freeze-drying this, a crude peptide can be obtained.
- a deprotection reaction and a cleavage reaction of a peptide chain from a support can be carried out in TFA by the same operation as described above.
- the obtained crude peptide can be separated and purified by applying it to HP LC.
- the elution may be performed under optimum conditions using a water-acetonitrile solvent commonly used for protein purification.
- the fraction corresponding to the peak of the obtained chromatographic profile is collected and freeze-dried. Petite purified in this way
- the dope fraction is identified by mass spectrometry molecular weight analysis, amino acid composition analysis, amino acid sequence analysis, or the like.
- I-6 partial peptide and the I6 receptor partial peptide are described in JP-A-2-188600, JP-A-7324097, JP-A-8-311098 and U.S. Pat.
- the activity of inhibiting IL-6 signaling of IL-6 antagonist used in the present invention can be evaluated by a commonly used method. Specifically, I -. 6 culturing dependent cell MH60 BSF2, this was added IL-6, and I at the same time - 6 1 Mr by and this coexistence of Antagonisu Bok - 6 dependent cell 3 H-thymidine incorporation can be measured. In addition, U266, a cell expressing 1-6 receptor, is cultured, and labeled IL-6 is added, and simultaneously, I-6 antagonist is added, thereby binding to 1L-6 receptor-expressing cells. the 'measuring 25 1 labeled IL- 6.
- CD4 positive and CD45RB strongly positive cells
- CD4—CD45RB h 1 gh cells were transferred to an animal that developed inflammatory bowel disease, and the I-6 antagonist used in the present invention was administered. This can be done by evaluating the improvement effect.
- Other effects of the present invention include an anorexia-suppressing effect in inflammatory bowel disease, abdominal pain reducing effect, diarrhea-reducing effect, and an effect of preventing recurrence of inflammatory bowel disease.
- CD4-CD45RB hsh cells transferred to an animal by IL-6 antagonist can be isolated, for example, by using the method described in Examples described later.
- the animal from which the CD4-CD45RB hl "cells are derived may be those usually used in experiments, for example, mice, rats, and the like. Any can be used.
- IL-6 antagonists such as --6 receptor antibody were shown to have therapeutic effects on inflammatory bowel disease.
- the treatment target in the present invention is a mammal.
- the mammal to be treated is preferably a human.
- the prophylactic or therapeutic agent of the present invention can be administered orally or parenterally systemically or locally.
- intravenous injection such as infusion, intramuscular injection, intraperitoneal injection, subcutaneous injection, suppository, enema, oral enteric solution, etc. can be selected, and the appropriate administration method depends on the patient's age and symptoms Can be selected.
- the effective dose is selected from the range of 0.01 mg / kg to 100 mg / kg body weight at a time.
- a dose of 1 to 1,000 mg, preferably 5 to 50 m per patient can be selected.
- the prophylactic or therapeutic agent of the present invention may be a pharmaceutically acceptable carrier or additive depending on the administration route. It may be one that includes both objects.
- Such carriers and additives include water, pharmaceutically acceptable organic solvents, collagen, polyvinyl alcohol, polyvinylpyrrolidone, vinyloxyvinyl polymer, and vinylphenol polymer.
- Raffin, stearinol alcohol, stearic acid, human serum albumin (HSA), mannitol examples include norebitol, lactose, and surfactants that are acceptable as pharmaceutical additives.
- the additives to be used are selected from the above or in combination according to the dosage form, and are not limited thereto.
- the disease to be treated in the present invention is an inflammatory bowel disease.
- Inflammatory bowel diseases include ulcerative colitis and Crohn's disease. All of these diseases are chronic diseases that occur frequently in young people around the age of 20 years, and the mechanism of the antigen and inflammatory pathology that causes them has not yet been elucidated. However, research to elucidate this has been actively carried out using clues such as cell-site force.
- CD4-positive CD45RB strongly positive cells were purified (CD4- CD45RB h 'gh) by the this be implanted into immunodeficient mice (SC ID mice) (Morr issey, PJ et al., J. Exp.Med. (1993) 178, 237-244, Leach, MW et al., Am. J. Pathol. (1996) 148, 1503-1515, Aranda, R. et al., J. Immunol. (1997) 158, 3464-3473).
- CD4 positive CD45RB weakly positive cells (CD4- CD45RB 1) can not elicit a bowel disease, rather CD4-positive CD45RB strongly positive cells have been shown and this suppresses the induction of intestinal disease by (Powrie, FR et al., J. Exp. Med. (1994) 179, 589-600). It has been known that the expression level of CD45RB correlates with the cytokine production pattern.
- CD4-positive CD45RB strongly-positive cells are like type 1 helva cells (Thl) that produce IFN ⁇ , TNF ⁇ , etc.
- CD4-positive CD45RB weakly-positive cells are IL-4, IL- It is thought to be type 2 helva cell (Th2) -like that produces 10 (Lee, W. et al., J. Immunol. (1990) 144, 3288-3295).
- BD The onset of BD implies that the balance between Thl and Th2 breaks down. This is similar to human ulcerative colitis in mice in which the IL-10 gene, which suppresses the Thl function, has been deleted by gene targeting. This is supported by the occurrence of chronic enteritis that develops (Kuhn, R. et al., Cell (1993) 75, 263-274).
- the histological characteristics of the large intestine were very similar to those with ulcerative colitis and Crohn's disease (Leach, M.W. et al., Am. J. Pathol. (1996) 148, 1503-1515).
- ulcerative colitis the rectum is often continuous and has a wide range of lesions, and the epithelium of the mucosa is specifically damaged.
- the lesions are similar to the clinical pathology, with the lesion mainly confined to the large intestine but over a wide area, and crypt extension.
- Crohn's disease is a full-thickness inflammation that occurs sporadically anywhere in the digestive tract, from the oral cavity to the anus, and is not confined to the mucous membrane. Histologically, it is characterized by non-caseating granuloma inflammatory foci. In this model, inflammation not confined to the mucosal layer was found, macrophages, lymphocytes, multinucleated giant cells, etc. accumulated, often in a granulomatous form, and almost crypt abscesses were found. Absence is similar to Clone disease.
- the spleen was aseptically collected from a BALB / c male mouse, crushed, and pipetted well to obtain a single cell suspension.
- the cell pellet is treated with Lysis solution (mixture of 0.16 M NH, CI and 0.17 M Tris buffer of pH 7.2 at a ratio of 9: 1).
- Lysis solution mixture of 0.16 M NH, CI and 0.17 M Tris buffer of pH 7.2 at a ratio of 9: 1).
- mouse spleen cells were obtained.
- the washed mouse spleen cells were suspended in RPM 11640 medium supplemented with 2 CS, the number of cells was counted, and adjusted to 1.1 ⁇ 10 8 / ml.
- 1/9 volume of anti-mouse CD4 antibody (L3T4 icrobeads, manufactured by Mitenyi Biotec) was added and allowed to bind to cells for 15 minutes at ice temperature (cell density 1 ⁇ 10 8 / ml). Further, a CD4 positive cell fraction was collected by column operation using an ini MACS separation system (manufactured by Mitenyi Biotec). After counting the cells, the cells were suspended in phosphate buffered saline supplemented with 23 ⁇ 4FCS and the cell density was adjusted to 4 ⁇ 10 7 / ml.
- CD4 positive and CD45RB strongly positive cell group (CD4 "CD45RB hli; h ) was sorted using a flow cytometer (FACS Vantage, Beet on Dickenson).
- the cell group is equivalent to the top 50% of the CD4RB-expressing cells among the CD4 and CD45RB-positive cells, and the obtained cells are centrifuged and phosphate buffered to 4 ⁇ 10 6 / ml.
- the cells were suspended in saline, and the purity of the cells was 973 ⁇ 4 for CD45RB strongly positive cells, and the viability was 983 ⁇ 4.
- a model of inflammatory bowel disease is prepared by transplanting 4 x 10 5 highly purified cells (4 x 10 6 / ml 100 1 each) into the peritoneal cavity of B- ⁇ scid mouse. (Leach,. W. et al., Am. J. Patho 1. (1996) 148, 1503-1515, Aranda, R. et al., J. Immunol. (1997) 158, 3464-3473).
- the experiment was performed in the following three groups according to the treatment method. (1) Cell transplantation ⁇ Anti-IL-6 receptor antibody non-administration group, 5 animals, (2) Cell transplantation ⁇ Anti-1L-6 receptor antibody administration group, 3 animals, (3) Cell non-implantation group, 3 animals Anti! Administration of the L-6 receptor antibody MR16-1 was performed as follows.
- mice were intraperitoneally administered at a dose of 10 mg / ml in phosphate buffered saline at a dose of 100 1 per animal, and this was repeated weekly and continued until 8 weeks later.
- phosphate buffered saline was administered in the same manner.
- the colon tissue (descending colon) was collected, immersed in the OCT compound, and cooled to -80 ° C. Frozen. Using a cryostat, a 6-m frozen section was prepared, and fixed with a 103 ⁇ 4 ′ formalin solution. The fixed tissue section was subjected to superstaining by hematoxyl in-eosin method and histologically analyzed.
- the efficacy was evaluated by weight change (expressed as a percentage of the former) before inflammatory bowel disease induced by cell transplantation and 8 to 9 weeks after cell transplantation, and by histological analysis.
- each mouse tissue was evaluated by classifying it into the following four grades of inflammatory bowel disease score (hereinafter also referred to as bowel disease score) (0, H. et al., J Autoimmunity (1997) 10, 455-459).
- Grade 1 Mild epithelial tissue thickening is observed.
- Grade 2 (moderate): intermediate between Grade 1 and 3
- Grade 3 Significant epithelial tissue thickening with extensive inflammatory infiltration and goblet cell loss.
- Table 1 shows the results of the weight change and the inflammatory bowel disease score.
- the mouse transplanted with CD4-positive and CD45-positive cells developed inflammatory bowel disease, and a histologically marked inflammation was observed. He also weakened with onset and lost an average of 11% of his body weight. On the other hand, in the group to which the anti-IL-6 receptor antibody was administered, a statistically significant suppression of weight loss was observed, and the body weight was maintained at the same level as before cell transplantation. Histological inflammatory bowel disease score also revealed that inflammatory bowel disease was reduced.
- the weight change test was performed using the AN0VA method (Analysis of variant, SPSS for windows ver.6, SPSS Inc.) first to confirm the significance, and then using the Bonferroni method for multiple comparisons. Yes at 5% or less The intention was recognized.
- anti-IL-6 receptor antibody is effective as a prophylactic or therapeutic agent for inflammatory bowel disease such as ulcerative colitis or Crohn's disease It became clear that it was.
- the bowel disease score was expressed as the average value of the group.
- Plasmid pBSF2R.236 was digested with the restriction enzyme SphI to obtain IL-6 receptor cDNA, which was then transferred to mpl8 (Amersham).
- a synthetic oligo-primer designed to introduce a stop codon into the IL-6 receptor cDNA PCR was performed using the Invitrometer Genetics System (Amersham). Mutations were introduced into the I6 receptor cDNA by the method described above. By this operation, a stop codon was introduced at the position of amino acid 345, and cDNA encoding soluble I6 receptor was obtained.
- Plasmid pECEdhfr344 which contains the cleaved soluble I-6 receptor cDNA and digested with Hind 111-Sal I, is inserted into the plasmid pECEdhfr344 containing the cDNA of dhfr. I got
- the selected CH0 cells were screened by limiting dilution to obtain a single CH0 cell clone.
- This CH0 cell clone was amplified with a methotrexate at a concentration of 20 nM to 200 nM to obtain a human soluble 1L-6 receptor-producing CH0 cell line 5E27.
- the CH0 cell line 5E27 was cultured in an Iscove modified Dulbecco's medium (IMDM, Gibco) containing 5% FBS. The culture supernatant was collected, and the concentration of soluble IL-6 receptor in the culture supernatant was measured by ELISA. As a result, it was confirmed that the soluble Ile6 receptor was present in the culture supernatant.
- IMDM Iscove modified Dulbecco's medium
- mice were immunized with 10 g of recombinant I6 (Hirano, T. et al., Immunol. Lett., 17:41, 1988) together with complete Freund's adjuvant. This was continued weekly until anti-IL-6 antibodies could be detected in the serum.
- Immune cells were excised from the local lymph node and fused with the Mie cooma cell line P3U1 using Polyethylene glycol 1500.
- Hybridomas are selected according to the method of Oi et al. Using HAT culture medium (Selective Methods in Cellular Immunology, WH Freeman and Co., San Francisco, 351, 1980) to produce anti-human IL-6 antibodies Established a hybrid vehicle.
- the hybridoma producing anti-human IL-6 antibody was prepared as follows.
- a -6 binding assay was performed. That is, a flexible 96-well microplate (made by Dynatech Laboratories, Inc., Alexandria, Va.) Made of flexible polyvinyl chloride was put in a 0.1 M carbonate-hydrogen carbonate buffer (pH 9.6) at 100 1 gel. The mixture was subjected to anti-mouse Ig (10/1 / ml, Cooper Biomedical, Inc., Malvern, PA) at 4 ° C. Next, the plate was treated with PBS containing 100 1 of 1% serum albumin (BSA) at room temperature for 2 hours.
- BSA serum albumin
- the anti- ⁇ -6 antibody MH166 produced by the hybridoma has a subtype of IgGl / c.
- BSF2 cells was dispensed so minute a 1 X 10 4 / 200 ⁇ 1 / well, to which was added a sample containing MH166 antibody were cultured for 48 hours, 0.5 Ci / well of 3 H Ji Mi Jin (New After adding England Nuclear, Boston, MA), the culture was continued for another 6 hours.
- the cells were treated with a glass filter paper (Kooki, Automated Nozzle Vest, Labo Mash Science Co., Tokyo, Japan), and a rabbit egypt-6 antibody was used as a control.
- MH166 antibody inhibited 3H-thymidine uptake of MH60.
- BSF2 cells induced by -6 in a dose-dependent manner. From this, MH Antibody 166 was found to neutralize the activity of IL-6.
- An anti-IL-6 receptor antibody MT18 prepared by the method of Hirata et al. (Hirata, Y. et al. J. Immunol., 143: 2900-290, 1989) was activated by CNBr to separate the antibody. 4B (Pharmacia Fine Chemicals, Piscataway, NJ) was bound according to the attached protocol to purify the 6 receptor (Yamasaki,. Et al., Science (1988) 241, 825-828).
- Human Mi Eroma cell line U266 1 diformate Toni emissions manufactured by Wako Chemicals
- ImM including 10mM preparative Rietano Rua Mi emissions (P H 7.8) and 0.
- mice were immunized four times every 10 days with the above partially purified IL-6 receptor obtained from 3 ⁇ 10 9 U266 cells, and then a hybridoma was prepared by a conventional method.
- the binding activity to the IL-6 receptor of the hybridoma culture supernatant from the growth positive hole was examined by the following method. 5 X 10 7 teeth '266 cells were labeled with 3 5 S Ichime Chionin (2.5 mCi), and solubilized with the above diformate phosphatonin buffer.
- the inhibitory activity of the antibody produced by Hypridoma PM-1 on the binding of 1L-6 to the human 1L-6 receptor was examined using a human cell line U266.
- Human recombinant I6 was prepared from Escherichia coli (Hirano, T. et al., Immunol. Lett. (1988) 17, 41-45), and the Volton-Hunter reagent (New England Nuclear, Boston) and 1 25 I-labeled by MA) (Taga, T. et al ., J. Exp. Med. (1987) 166, 967-981).
- Monoclonal antibodies against mouse IL-6 receptor were prepared by the method described in Sai to, T. et al., J. Immunol. (1991) 147, 168-173.
- CH0 cells producing mouse soluble IL-6 receptor were cultured in IMDM culture medium containing 103 ⁇ 4iFCS, and the anti-mouse iL-6 receptor antibody RS12 (see Saito, T. et al, supra) was purified from the culture supernatant using Affigel 10
- the mouse soluble IL-6 receptor was purified using an affinity column immobilized on a gel (Biorad).
- mouse soluble IL-6 receptor 50 zg was mixed with Freund's complete adjuvant and injected into the abdomen of Wistarrat. Two weeks later Were boosted with incomplete Freund's adjuvant. On day 45, rat spleen cells were collected, and 2 ⁇ 10 8 cells were fused using 1 ⁇ 10 7 mouse myeloma cells P3U1 and 50% PEG1500 (Boehringer Mannheim) by a conventional method. After that, the hybridomas were screened in a HAT medium.
- hybridoma culture supernatant After adding the hybridoma culture supernatant to a plate coated with a heron anti-rat IgG antibody (manufactured by Cappel), the mouse soluble iL-6 receptor was reacted. Next, hybridomas producing antibodies to the mouse soluble I6 receptor were screened by ELISA using a mouse heron anti-mouse IL-6 receptor antibody and an alkaline phosphatase-labeled hidge anti-heron 1 gG. I was leaning. The hybridoma clone, in which antibody production was confirmed, was subscribed twice to obtain a single hybridoma clone. This clone was named MR16-1.
- the neutralizing activity of the antibody produced by this hybridoma in the signaling of mouse 1L-6 was determined using MH60.
- BSF2 cells (Matsuda, T. et al., J. Immunol. (1988) 18, 951-956). 3 H thymidine was taken up. MH60.
- BSF2 cells were prepared at a concentration of 1 ⁇ 10 4 cells / 200 1 / ⁇ l in a 96- ⁇ l plate.
- IL-6 antagonists such as anti-I-6 receptor antibody are inflammatory It has been shown to have a therapeutic effect on sexual bowel disease. Therefore, it was revealed that 1L-6antagonist is useful as a therapeutic agent for Crohn's disease or ulcerative colitis.
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Priority Applications (13)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
HU0101694A HU225539B1 (en) | 1998-03-17 | 1999-03-16 | Preventives or remedies for inflammatory intestinal diseases containing as the active ingredient antibody against il-6 receptor |
PL342938A PL201461B1 (pl) | 1998-03-17 | 1999-03-16 | Czynnik zapobiegający lub terapeutyczny do leczenia zapalenia jelita, zawierający antagonistę IL-6 jako składnik aktywny |
DK99907951T DK1074268T3 (da) | 1998-03-17 | 1999-03-16 | IL-6-receptorantagonistantistofholdige forebyggende eller terapeutiske midler mod inflammatoriske tarmsygdomme |
US09/646,188 US6723319B1 (en) | 1998-03-17 | 1999-03-16 | Method of treating inflammatory intestinal diseases containing as the ingredient IL-6 receptors antibodies |
JP2000536409A JP4124573B2 (ja) | 1998-03-17 | 1999-03-16 | Il−6アンタゴニストを有効成分として含有する炎症性腸疾患の予防又は治療剤 |
AU27481/99A AU754006B2 (en) | 1998-03-17 | 1999-03-16 | Preventives or remedies for inflammatory intestinal diseases containing as the active ingredient IL-6 antagonists |
DE69937994T DE69937994T2 (de) | 1998-03-17 | 1999-03-16 | Prophylaktische oder therapeutische mittel gegen entzündliche erkrankungen des verdauungstraktes enthaltend antagonistische il-6 rezeptor antikörper |
CA002324115A CA2324115C (en) | 1998-03-17 | 1999-03-16 | A preventive or therapeutic agent for inflammatory bowel disease comprising il-6 antagonist as an active ingredient |
EP99907951A EP1074268B1 (en) | 1998-03-17 | 1999-03-16 | Preventives or remedies for inflammatory intestinal diseases containing il-6 receptor antagonist antibodies |
NO20004581A NO327718B1 (no) | 1998-03-17 | 2000-09-14 | Anvendelse av et antistoff mot IL-6 reseptoren for dannelse av et middel for inflammatorisk mavesykdom. |
HK01104649A HK1033911A1 (en) | 1998-03-17 | 2001-07-05 | Preventives or remedies for inflammatory intestinal diseases containing il-6 receptor antagonist antibodes |
HK01107040A HK1036018A1 (en) | 1998-03-17 | 2001-10-08 | Preventives or remedies for inflammatory intestinal diseases containing as the active ingredient il-6 antagonists |
US10/677,227 US7824674B2 (en) | 1998-03-17 | 2003-10-03 | Preventive or therapeutic agent for inflammatory bowel disease comprising IL-6 antagonist as an active ingredient |
Applications Claiming Priority (2)
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JP10/67250 | 1998-03-17 | ||
JP6725098 | 1998-03-17 |
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US09646188 A-371-Of-International | 1999-03-16 | ||
US09/646,188 A-371-Of-International US6723319B1 (en) | 1998-03-17 | 1999-03-16 | Method of treating inflammatory intestinal diseases containing as the ingredient IL-6 receptors antibodies |
US10/677,227 Division US7824674B2 (en) | 1998-03-17 | 2003-10-03 | Preventive or therapeutic agent for inflammatory bowel disease comprising IL-6 antagonist as an active ingredient |
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WO1999047170A1 true WO1999047170A1 (fr) | 1999-09-23 |
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PCT/JP1999/001298 WO1999047170A1 (fr) | 1998-03-17 | 1999-03-16 | Agents prophylactiques ou therapeutiques pour affections intestinales inflammatoires renfermant, comme ingredient actif, des antagonistes de il-6 |
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US (2) | US6723319B1 (ja) |
EP (1) | EP1074268B1 (ja) |
JP (1) | JP4124573B2 (ja) |
KR (1) | KR100407811B1 (ja) |
CN (2) | CN100374159C (ja) |
AT (1) | ATE383875T1 (ja) |
AU (1) | AU754006B2 (ja) |
CA (1) | CA2324115C (ja) |
CZ (1) | CZ297083B6 (ja) |
DE (1) | DE69937994T2 (ja) |
DK (1) | DK1074268T3 (ja) |
ES (1) | ES2299241T3 (ja) |
HK (2) | HK1033911A1 (ja) |
HU (1) | HU225539B1 (ja) |
NO (1) | NO327718B1 (ja) |
PL (1) | PL201461B1 (ja) |
PT (1) | PT1074268E (ja) |
RU (1) | RU2195960C2 (ja) |
WO (1) | WO1999047170A1 (ja) |
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JPH08311098A (ja) * | 1995-05-22 | 1996-11-26 | Daicel Chem Ind Ltd | 新規ペプチド類およびそれを含有するインターロイキン6拮抗剤 |
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