WO2006004207A1 - 抗シノビオリン抗体 - Google Patents
抗シノビオリン抗体 Download PDFInfo
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- WO2006004207A1 WO2006004207A1 PCT/JP2005/012706 JP2005012706W WO2006004207A1 WO 2006004207 A1 WO2006004207 A1 WO 2006004207A1 JP 2005012706 W JP2005012706 W JP 2005012706W WO 2006004207 A1 WO2006004207 A1 WO 2006004207A1
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- cancer
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- antibody
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- C12Q—MEASURING OR TESTING PROCESSES INVOLVING ENZYMES, NUCLEIC ACIDS OR MICROORGANISMS; COMPOSITIONS OR TEST PAPERS THEREFOR; PROCESSES OF PREPARING SUCH COMPOSITIONS; CONDITION-RESPONSIVE CONTROL IN MICROBIOLOGICAL OR ENZYMOLOGICAL PROCESSES
- C12Q1/00—Measuring or testing processes involving enzymes, nucleic acids or microorganisms; Compositions therefor; Processes of preparing such compositions
- C12Q1/25—Measuring or testing processes involving enzymes, nucleic acids or microorganisms; Compositions therefor; Processes of preparing such compositions involving enzymes not classifiable in groups C12Q1/26 - C12Q1/66
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- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P19/00—Drugs for skeletal disorders
- A61P19/02—Drugs for skeletal disorders for joint disorders, e.g. arthritis, arthrosis
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- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P35/00—Antineoplastic agents
- A61P35/02—Antineoplastic agents specific for leukemia
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- A61P37/00—Drugs for immunological or allergic disorders
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- A61P9/00—Drugs for disorders of the cardiovascular system
- A61P9/10—Drugs for disorders of the cardiovascular system for treating ischaemic or atherosclerotic diseases, e.g. antianginal drugs, coronary vasodilators, drugs for myocardial infarction, retinopathy, cerebrovascula insufficiency, renal arteriosclerosis
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07K—PEPTIDES
- C07K16/00—Immunoglobulins [IGs], e.g. monoclonal or polyclonal antibodies
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07K—PEPTIDES
- C07K16/00—Immunoglobulins [IGs], e.g. monoclonal or polyclonal antibodies
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- A61K2039/505—Medicinal preparations containing antigens or antibodies comprising antibodies
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- C07K—PEPTIDES
- C07K2317/00—Immunoglobulins specific features
- C07K2317/70—Immunoglobulins specific features characterized by effect upon binding to a cell or to an antigen
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Definitions
- the present invention relates to an anti-synoviolin antibody. More specifically, the present invention relates to an antibody capable of inhibiting synoviolin auto-ubiquitination, a pharmaceutical composition containing the antibody, and a method for detecting a cell expressing synoviolin using the antibody.
- RA Rheumatoid arthritis
- Synovial cells are fibroblast-like cells that form 1 to 6 epithelial-like layers in the synovial membrane of the joint, and are supposed to supply proteoglycan and hyaluronic acid to the synovial fluid.
- Symptoms such as synovial tissue proliferation, the resulting multilayered structure, and infiltration of synovial cells into other tissues are observed in the joints of RA patients.
- autoantibodies against the Fc region of autologous immunoglobulin (IgG) are present in the serum of RA patients.
- Autoantibodies, also called RA factors have long been used as a characteristic diagnostic indicator of RA.
- an anti-human synovial cell antibody was obtained using the cultured human synovial cells of RA patients as an immunogen, and the cDNA library of the synovial cells was immunoscreened and expressed in the synovial tissues of RA patients. I found a new gene. This gene was also successfully isolated, and the protein encoded by it was named synoviolin, the synovial cell that expresses it, and its physiological significance was clarified. (International Publication No. WO02 / 052007 Pamphlet).
- Synoviolin discovered by the inventors is closely related to the abnormal growth of synovial tissue, which is the main cause of RA disease, and is expected to provide extremely important information in diagnosis.
- Synoviolin is also known to encode an E3 ubiquitin ligase with a RING finger motif from the protein structure prediction system. This motif plays an important role in the ubiquitination of proteins, but in fact, it has been proved to have self-ubiquitination activity, and it is speculated that this also controls protein functions.
- the present inventors have found for the first time that synoviolin has a ubiquitin ligase action that causes self-ubiquitination. Disclosure of the invention
- synoviolin has a ubiquitin ligase action that causes self-ubiquitination, and thus has an anti-inhibition effect on synoviolin self-ubiquitination.
- a synoviolin antibody was found and the present invention was completed.
- the present invention is as follows.
- the antibody may be a monoclonal antibody.
- a method for producing a monoclonal antibody against Synoviolin capable of inhibiting Synoviolin auto-ubiquitination, wherein the peptide comprising any one of the amino acid sequences shown in SEQ ID NOs: 3 to 5 is immunized as an antigen A method comprising culturing a fusion cell of an animal antibody-producing cell and a myeloma cell, and collecting the monoclonal antibody from the obtained culture.
- a pharmaceutical composition comprising the antibody or fragment thereof according to (1) or (2).
- This pharmaceutical composition is, for example, a cell proliferative disease, rheumatoid arthritis, cancer, fibrosis, arteriosclerosis, Castleman's disease, multiple myeloma, Crohn's disease, systemic juvenile idiopathic arthritis, brain tumor, tongue cancer, pharyngeal cancer Lung cancer, breast cancer, esophageal cancer, stomach cancer, knee cancer, biliary tract cancer, gallbladder cancer, duodenal cancer, colorectal cancer, liver cancer, uterine cancer, ovarian cancer, prostate cancer, kidney cancer, bladder cancer, striated muscle sarcoma, fibrosarcoma Can be used for the treatment or prevention of osteosarcoma, chondrosarcoma, skin cancer, acute myeloid leukemia, acute lymphocytic leukemia, chronic lymphocyte leukemia, adult T cell leukemia, malignant lymphoma.
- a synoviolin self-ubiquitination inhibitor comprising the antibody or fragment thereof according to (1) or (2).
- a synoviolin-containing cell detection reagent comprising the antibody or fragment thereof according to (1) or (2).
- a reagent for detecting a cell proliferative disease caused by Synoviolin comprising the antibody or fragment thereof according to (1) or (2).
- cell proliferative diseases include rheumatoid arthritis, cancer, fibrosis, arteriosclerosis, Castleman's disease, multiple myeloma, Crohn's disease, whole body Type Idiopathic arthritis, brain tumor, tongue cancer, pharyngeal cancer, lung cancer, breast cancer, esophageal cancer, stomach cancer, knee cancer, biliary tract cancer, gallbladder cancer, duodenal cancer, colon cancer, liver cancer, uterine cancer, ovarian cancer, prostate cancer, Kidney cancer, bladder cancer, rhabdomyosarcoma, fibrosarcoma, osteosarcoma, chondrosarcoma, skin cancer, acute myeloid leukemia, acute lymphocytic leukemia, chronic lymphocyte leukemia, adult ⁇ -cell leukemia, malignant lymphoma, etc. .
- the above cells are synovial cells, osteoclasts, keratinized epithelial cells, blood cells, cancer cells, bone marrow cells, fibroblasts, vascular endothelial cells, dermal cells, muscle cells, nerve cells, lymphocytes, vascular smoothness It may be selected from the group consisting of muscle cells, hepatocytes, pigment cells, adipocytes, uterine endothelial cells, alveolar epithelial cells, undifferentiated mesenchymal cells, and ectoderm crests.
- a method for inhibiting synoviolin self-ubiquitination comprising reacting the antibody or fragment thereof according to (1) or (2) with synoviolin.
- a method for detecting synopioline-expressing cells comprising reacting the antibody or fragment thereof according to (1) or (2) with a biological sample.
- a method for detecting a cell proliferative disease with Synoviolin comprising reacting the antibody or fragment thereof according to (1) or (2) with a biological sample collected from a subject.
- Cell proliferative diseases and cell types are the same as described above.
- the above cells are synovial cells, osteoclasts, keratinized epithelial cells, blood cells, cancer cells, bone marrow cells, fibroblasts, vascular endothelial cells, dermal cells, muscle cells, nerve cells, lymphocytes, vascular smoothness It may be any cell selected from the group consisting of muscle cells, hepatocytes, pigment cells, fat cells, uterine endothelial cells, alveolar epithelial cells, undifferentiated mesenchymal cells, and ectoderm apical ridges.
- Fig. 1 is a photograph showing the results of Western blotting of synovial cells from patients with rheumatoid arthritis (RA: 2 samples) and osteoarthritis patients (OA: 2 samples) using SL-1 antibody. .
- Figure 2 shows a photograph of the results of fluorescent immunostaining of RA patient-derived synoviocytes with SL-1 antibody.
- FIG. 3 is a diagram showing immunostaining results of RA patient-derived synovial tissue with SL-1 antibody and hematoxylin'eosin (HE) -stained images.
- Figure 4 is a photograph of a Western plotting analysis showing that self-ubiquitination of MBP-dTM Syno-His fusion protein was inhibited by SL-1 antibody.
- Figure 5 is a photograph of a stamp stamping analysis showing that synovioline ubiquitination of the GST-P4HA1 fusion protein was not affected by the SL-1 antibody.
- the antibody of the present invention is an antibody against Synoviolin that can inhibit Synoviolin auto-ubiquitination, and is obtained by immunizing with a peptide consisting of a part of amino acid sequence of Synoviolin RING finger region as an antigen. It is.
- Ubiquitination is a process in which enzymes such as ubiquitin-activating enzyme (E1), ubiquitin-conjugating enzyme (E2), and ubiquitin ligase (E3) cooperate to bind ubiquitin to a substrate protein one after another. It is.
- E1 ubiquitin-activating enzyme
- E2 ubiquitin-conjugating enzyme
- E3 ubiquitin ligase
- self-ubiquitination, auto ubiquitination means that synoviolin itself has a ubiquitin ligase activity, so that synoviolin itself becomes a substrate protein for ubiquitination and is caused by other ubiquitin ligases. It is what binds ubiquitin on its own. Synopioline self-ubiquitination was revealed by the present inventors when synoviolin was found to have ubiquitin ligase activity. That is, Shino in mice Overexpression of violin causes spontaneous development of arthropathy with synovial cell proliferation
- the “antibody” means the whole antibody molecule (which may be a polyclonal antibody or a monoclonal antibody) capable of binding to the antigen Synoviolin or a partial fragment thereof, That is, active fragments having antigen-antibody reaction activity, specifically, Fab, F (ab ′) 2 , Fv, recombinant Fv form, and single chain Fv are also included.
- Synoviolin fragments having antigen-antibody reaction activity, specifically, Fab, F (ab ′) 2 , Fv, recombinant Fv form, and single chain Fv are also included.
- an equivalent or equivalent protein, a fragment or a partial peptide thereof can be used as an immunogen. Any of them can be an antigen of an anti-sinoviolin antibody. This is because antibodies are generally induced by the recognition of a small region of the protein surface known as the epitope site, rather than the antigen being induced by comprehensive recognition of the entire protein structure. . Such epitope sites are formed by continuous or discontinuous portions of the polypeptide chain. Therefore, for a single antibody against Synoviolin, The site acting as a group corresponds to a limited peptide site of Synoviolin.
- Synoviolin used in the present invention may be derived from humans, mice, rats, etc., and is not particularly limited.
- synoviolin for example, a polypeptide comprising the amino acid sequence represented by SEQ ID NO: 2 can be used.
- proteins equivalent to or equivalent to synoviolin can also be used as antigens (described later).
- Synoviolin can be obtained from the synovial tissue of RA patients. Since synoviocytes can be cultured in vitro, synoviolin can be recovered from this culture. Specifically, synovial cells are separated from this tissue based on synovial tissue surgically excised from RA patients by synovectomy. When the separated cells are cultured, synoviocytes can be collected as adherent cells (Nakajima T et. Al., J. Clin. Invest. 92: 186-193, 1993). Synoviolin is extracted and purified from the collected cells by combining known protein purification techniques. The obtained Synoviolin or a fragment thereof can be used as an immunogen for obtaining an antibody.
- Synoviolin can be obtained not only as a biomaterial but also as a gene recombinant expression product by incorporating a gene encoding synoviolin into an appropriate expression system.
- the polynucleotide encoding synoviolin may be of any origin. In other words, it can be obtained by synthesis in addition to genomic DNA and cDNA. Also, the nucleic acid can be DNA: NA. Furthermore, as long as it can encode Synoviolin, it includes a polynucleotide having an arbitrary base sequence based on the degeneracy of the genetic code, or one containing a modified nucleotide.
- a cDNA library is obtained based on the mRNA extracted from the synovial cells of the RA patient, and then cloned. Just do it. That is, the desired polynucleotide can be obtained by amplifying a cDNA library by PCR or the like and screening a hybridizing clone (Short JM, et. Al., Nucleic Acid Res. 16: 7583- 7600, 1988).
- SEQ ID NO: 1 shows the base sequence of DNA encoding the polypeptide represented by SEQ ID NO: 2.
- an expression vector pGEX and E. coli can be exemplified.
- fusion protein expression vectors using a histidine tag, HA tag, FLAG tag, etc. are commercially available.
- a host / vector system an expression system using a yeast of the genus Pichia or an expression system using a baculovirus vector hosted by insect cells is effective for the expression of a protein having a sugar chain.
- transfection of vectors using a mammalian cell using a cytomegalovirus (CMV) promoter, a rous meat heavy virus (RSV) promoter, or a promoter such as SV40 is performed.
- CMV cytomegalovirus
- RSV rous meat heavy virus
- synoviolin in the present invention, it is also possible to collect synoviolin from the above Synoviolin gene or the above vector. That is, in the present invention, synoviolin can be produced by employing a cell-free protein synthesis system without using any living cells.
- a cell-free protein synthesis system is a system that synthesizes a protein in an artificial container such as a test tube using a cell extract.
- the cell-free protein synthesis system used in the present invention also includes a cell-free transcription system that synthesizes RNA using DNA as a cage.
- the organism corresponding to the above host corresponds to the organism from which the following cell extract is derived.
- the cell extract is an extract derived from a eukaryotic cell or a prokaryotic cell, for example, an extract of wheat germ, rabbit rabbit reticulocyte, mouse L-cell, HeLa cell, CHO cell, budding yeast, E. coli, etc. Can be used. These cell extracts may be concentrated or not concentrated.
- the cell extract can be obtained, for example, by ultrafiltration, dialysis, polyethylene glycol (PEG) precipitation or the like. Furthermore, in the present invention, cell-free protein synthesis is commercially available.
- the kit can also be used. Examples of such kits include the reagent kit PROTEIOS TM (Toyobo), TNT TM System (Promega), the synthesizer PG-Mate TM (Toyobo), and RTS (Roche Diagnostics). Synoviolin obtained by cell protein synthesis as described above can be purified by appropriately selecting chromatography as described above.
- Proteins that can serve as antigens when preparing anti-synoviolin monoclonal antibodies include not only human synoviolin extracted from synoviocytes, but also various proteins functionally equivalent to synoviolin. Such proteins, whether artificial or naturally occurring, have one or several amino acid substitutions, deletions, additions and / or insertions in the amino acid sequence of human synoviolin. Proteins that have been mutated due to the above, modified proteins in which amino acid side chains are modified, and fusion proteins with other proteins are also included.
- amino acid mutations or modifications in these proteins, or the site of mutation or modification is not limited as long as the function of synoviolin is retained.
- amino acid sequence represented by SEQ ID NO: 2 one or more (for example, one or several) amino acids have been mutated by substitution, deletion, addition and / or insertion, etc., or the amino acid side A modified protein in which the chain is modified can be used.
- amino acids of the amino acid sequence shown in SEQ ID NO: 2 may be in other amino acids.
- a mutant synoviolin polypeptide having an amino acid sequence obtained by combining the above (i) to (iii) and having the same action as the above-mentioned synoviolin can also be used.
- the polypeptide used in the present invention may be a polypeptide having the above-mentioned synoviolin amino acid sequence and homozygote as long as it has a function equivalent to that of synoviolin. Examples thereof include amino acid sequences having homology of about 85% or more, preferably about 90% or more, more preferably about 95% or more with the amino acid sequence of the above Synoviolin polypeptide.
- a polynucleotide encoding an amino acid sequence in which one or more amino acids are deleted, inserted or added in the amino acid sequence represented by SEQ ID NO: 2 is described in ⁇ Molecular Cloning, A Laooratory Manual 2nd ed. J (Cold Spring Harbor Press 1989), ⁇ Current Protocols in Molecular Biology '' (John Wiley & Sons 1987-1997), Kunkel TA, Proc. Natl. Acad. Sci. USA 82: 488-92, 1985, etc. It can be prepared according to a method such as site-directed mutagenesis.
- mutagenesis kit utilizing site-directed mutagenesis, for example QuikChange TM Site-Directed Mutagenesis Kit (scan Toratajin GeneTailor TM Site-Directed Mutagenesis System (manufactured by Invitrogen), TaKai a Site-Directed Mutagenesis System (Mutan-K, Mutan-Super Express Km, etc .: manufactured by Takara Bio Inc.) and the like.
- QuikChange TM Site-Directed Mutagenesis Kit scan Toratajin GeneTailor TM Site-Directed Mutagenesis System (manufactured by Invitrogen), TaKai a Site-Directed Mutagenesis System (Mutan-K, Mutan-Super Express Km, etc .: manufactured by Takara Bio Inc.) and the like.
- a protein immunologically equivalent to synoviolin can be shown first. That is, as long as it is a protein functionally equivalent to synoviolin and recognizes synoviolin specifically and reacts with an antibody present in the serum of RA patients, it contains a synoviolin domain.
- proteins that are functionally equivalent to Synoviolin are also defined based on their binding properties with ligand proteins that bind to Synoviolin.
- HMG-CoA Reductase Degradation 3 HMG-CoA Reductase Degradation 3 (Hrd3), Procollagen-Proline, 2-oxo-Goleretanolate 4-Dioxygenase (Proline 4 hydraxylase), a 3, Rehepted I (P4HA1), omocysteine- indusible endoplasmic reticulum stress -in dusible ubiquitin-like domain member 1 (Herp)
- Hrd3 HMG-CoA Reductase Degradation 3
- Procollagen-Proline Procollagen-Proline
- 2-oxo-Goleretanolate 4-Dioxygenase Proline 4 hydraxylase
- P4HA1 Rehepted I
- omocysteine- indusible endoplasmic reticulum stress -in dusible ubiquitin-like domain member 1 Herp
- proteins functionally equivalent to human synoviolin include proteins that have an activity that contributes to normal bone formation or limb development. Synoviolin is strongly expressed in the sites where bone and cartilage are formed in the parietal bone, limbs, ears, etc. during development, and apical ectodermal ridge (AER) and cartilage / osteogen in the limb formation stage. Strong expression is observed in the group.
- AER apical ectodermal ridge
- proteins functionally equivalent to Synoviolin according to the present invention can be defined based on the biochemical activity of Synoviolin, such as ubiquitin ligase activity. These biochemical activities are supported by various motifs and experimental results found in Synoviolin.
- Proteins that are functionally equivalent to Synoviolin include amino acid residue modifications, conservative substitutions, deletions, additions or insertions, physiological or artificial modifications such as sugar chains, labels such as fluorescent and radioactive substances, Alternatively, proteins with various modifications such as fusion with other proteins are also included.
- proteins with various modifications such as fusion with other proteins are also included.
- differences in modification with sugar chains may occur depending on the host to be expressed.
- Synoviolin As an example of a fusion protein with another protein, an additional amino acid sequence such as a FLAG tag, HA tag, or histidine tag was added, and at least one property was maintained as a protein functionally equivalent to the Synoviolin. There is protein. Or even if it has an activity different from Synoviolin, Synoviolin Also included are fusion proteins that have at least one function. Since Synoviolin is self-ubiquitinated even in its intracellular domain alone, Synoviolin used in the present invention may be Synoviolin dTM excluding the transmembrane site. For example, MBP-synoviolin dTM-His in which the above tag protein is fused to the dTM can also be used in the present invention.
- Another example is a fusion protein that has an activity different from that of Synoviolin but maintains at least one function of Synoviolin.
- synoviolin or a protein equivalent thereto can be used as an antigen for producing an anti-synoviolin antibody.
- antibody detection not only the antigen molecule itself (that is, synoviolin or an equivalent protein), but also fragments of these proteins, fragment peptides, and chemically synthesized oligopeptides are used as appropriate carriers.
- a method of using a complex containing the same as an antigen is employed. The reason is that an analysis system that is specific to a particularly dominant epitope or a clinically meaningful epitope is less susceptible to nonspecific reactions.
- a domain functioning as an epitope can be determined based on a method for obtaining an immunologically active domain peptide described later.
- epitopes may consist of at least 3 amino acid residues. It is said that immunological discrimination from other proteins is possible with at least 8 amino acid residues. Therefore, Synoviolin or its equivalent Consisting of at least 8 consecutive amino acid residues selected from the amino acid sequence of the protein, usually 9 amino acid residues, preferably 10 amino acid residues, more preferably 11 to 15 amino acid residues, especially patient serum A fragment that reacts with the antibody therein is desirable as an antigen for antibody detection in the present invention.
- a method for improving immunological reactivity by adding various modifications to the oligopeptide constituting the epitope is also known to those skilled in the art.
- modifications such as addition of an inactive protein such as human serum albumin or a meaningless amino acid sequence contribute to the improvement of immunological reactivity.
- Synoviolin fragments can be obtained by enzymatic digestion with proteases such as trypsin, chymotrypsin, pepsin or chemical cleavage using promocyan, or a combination thereof.
- proteases such as trypsin, chymotrypsin, pepsin or chemical cleavage using promocyan, or a combination thereof.
- known separation techniques such as chromatography and electrophoresis may be used.
- a peptide portion that is assumed to be suitable with 14 or more amino acid residues is first determined by an analysis method that searches for the hydrophilic profile of synoviolin and other antigenic indices.
- These peptides as immunogen candidates can be synthesized by a peptide synthesis technique based on a known technique, liquid phase method or solid phase method.
- the solid phase synthesis method represented by the Merrifield method is simple and can be performed in a short time.
- Tertiary ptyloxycarbonyl (Boc) is typically used as the ⁇ -amino protecting group, but the 9-fluorenylmethoxycarbonyl (Fmoc) group (Atherton, E & Sheppard, RC, J) developed by Sheppard et al. Chem. Soc. Chem. Comm. 165, 1985) is also available (see Nobuo Izumiya, et al., “Basics and Experiments of Peptide Synthesis” on pages 194-233, Maruzen, 1985).
- an automated peptide synthesizer based on a solid phase synthesis method may be used.
- the synthesized peptide is cleaved from the resin in the presence of trifluoroacetic acid and then purified by reverse phase high performance liquid chromatography.
- the purified peptide desirably has a purity of 85% or more.
- a peptide that reacts with a polyclonal antibody collected from an immunized animal and synoviolin and shows a positive detection reaction with an enzyme-labeled anti-IgG antibody is used as an immune antigen for producing the antibody of the present invention.
- synoviolin fragments as immunogens include at least one peptide comprising the following amino acid sequence:
- An immunogen prepared by conjugating these peptides to a carrier protein provides an antibody that is specific for synoviolin and has sufficient binding affinity.
- the above peptide of synoviolin which is useful as an immunogen, is sensitized to animals after binding to moss guanine (KLH) as a carrier protein.
- carrier substances that can be used to obtain immunogens include tuberculin purified protein derivatives, tetanus denatured toxin, cholera toxin and its B subunit, diphtheria toxin, ovalbumin, ushi serum albumin, soybean trypsin inhibitor Muramyl dipeptide, brown lipoprotein, and the like.
- the antigen prepared as described above is administered to a mammal.
- Mammals are particularly limited Rather than, for example, rats, mice, and rabbits, but rabbits are preferred.
- the dose of antigen per animal is 1 to 10 mg for rabbits when no adjuvant is used, and 0.1 to 1 mg when adjuvants are used.
- adjuvants include Freund's complete adjuvant (FCA), Freund's incomplete adjuvant (FIA), and aluminum hydroxide adjuvant.
- FCA Freund's complete adjuvant
- FIA Freund's incomplete adjuvant
- Aluminum hydroxide adjuvant examples include aluminum hydroxide adjuvant.
- Immunization is performed mainly by injecting intravenously, subcutaneously or intraperitoneally.
- the immunization interval is not particularly limited, and immunization is performed 1 to 10 times, preferably 2 to 5 times at intervals of several days to several weeks, preferably 2 to 5 weeks.
- the antibody titer was measured by enzyme immunoassay (ELISA) or EIA (enzyme immunoassay), fcc radioimmunoassay fe (RlA; radioimmuno assay), etc. And collect blood on the day that shows the maximum antibody titer to obtain antiserum.
- ELISA enzyme immunoassay
- EIA enzyme immunoassay
- RlA radioimmunoassay
- synoviolin as an antigen for immunization, or an immunologically equivalent protein, or a fragment or fragment peptide thereof is used alone as an immunogen at a site where mammalian antibodies can be produced. Or with a carrier and diluent.
- an adjuvant or the like may be mixed and administered (Adv. Tubercl. Res., 1: 130-148, 1956).
- adjuvants include FCA, FIA, and aluminum hydroxide adjuvant.
- a monoclonal antibody forms a fusion cell between an immunocompetent cell (specifically, an antibody-producing cell) and a myeloma cell (myeloma cell), and clones the cell to produce an antibody specific for synoviolin. It can be obtained by selecting clones (Kohler, G. & Milstein, C, Nature 256: 495-7, 1975).
- a complex containing the above peptide (or synoviolin or an immunologically equivalent protein or fragment thereof) is used as an immunogen.
- immunize animals with 20 ig to l mg, dissolved or mixed with a suitable adjuvant.
- mice examples include mice, guinea pigs, rabbits, rats, hedges, goats, monkeys, and dogs. In general, mice or rabbits are preferably used because of their ease of handling. .
- the antibody-producing cells and the myeloma cells are preferably derived from the same species. The administration is usually performed once every 2 to 6 weeks in a period of 3 to 6 months, 2 to about L0 times.
- To collect antibody-producing cells select an individual with an antibody titer from the antigen-sensitized animal, and collect spleen cells, lymph node cells, or B-lymphocytes 2 to 5 days after the final immunization.
- the antibody-producing cells contained therein are fused with myeloma cells capable of self-sustaining proliferation.
- a hyperprideoma that produces a monoclonal antibody can be prepared. The procedure should basically follow the method of Köhler (“Immunological Method”, Academic Press, New York, 391, 1979).
- myeloma cells include mouse myeloma cell lines such as P3U1, NS-1, and SP2 / 0, or mutants thereof, and P3U1 is particularly preferred.
- the fusion promoter include polyethylene glycol (PEG), Sendai virus, and the like. Preferably, PEG is used.
- the myeloma cells are suspended in RPMI1640 medium or the like that does not contain serum, and the suspension containing the antibody-producing cells such as spleen cells prepared above is added to the suspension for a while.
- HAT hypoxanthine, aminopterin, thymidine
- Cultivation is usually 20-40 ° C, preferably 34-38 ° C in an incubator under 5% carbon dioxide.
- Hypridor grows and colony formation is observed.
- the duration of the culture is usually 5 days to 3 weeks, preferably:! To 2 weeks.
- Selection of monoclonal antibodies can usually be performed using animal cell culture medium supplemented with HAT.
- the selection and breeding medium is not particularly limited as long as it can grow a high-pridoma.
- a serum-free medium for hybridoma culture RPMI medium containing fetal calf serum (FCS), GIT medium, or the like can be used.
- the antibody titer against the peptide in the culture supernatant of the well where proliferation has been observed is measured by an enzyme antibody method or the like, and the hybridoma is cloned by, for example, the limiting dilution method to obtain the clone of the hybridoma of the present invention.
- the operation for screening the formed high-pridor of the present invention is generally as follows.
- the hybridoma culture supernatant is added to a solid phase such as a microplate on which the peptide used as an immunogen is adsorbed directly or together with a carrier, and then anti-immunoglobulin antibody or protein A labeled with a radioactive substance, enzyme, etc.
- a method for detecting a monoclonal antibody bound to a solid phase is convenient.
- a hybridoma culture supernatant may be added to a solid phase on which an anti-immunoglobulin antibody or protein A is adsorbed, and then a labeled antigen may be added to detect a monoclonal antibody bound to the solid phase.
- Select positive tools by the above procedure and after a few days, seed one 96-well plate per strain, for example, at 100 cells / plate, and culture for 10-14 days. Determine the colonies and apply the culture supernatant to the above-mentioned antigen-immobilized plate for screening. After culturing, the selected colonies are recloned and cultured for 10 to L4 days, and the colony determination culture supernatant assay is performed as described above. Select a tool for each parent strain, incubate on a 24 tool plate, collect the supernatant, check the clones, and test antibody subclass antibody production.
- the present invention When the clone SL-1 selected as described above is cultured in vivo and in vitro, the present invention
- the monoclonal antibody SL-1 antibody is produced.
- a method commonly used in the technical field can be used.
- Hypridoma SL-1 is cultured in an in vitro culture medium
- the SL-1 antibody may be separated from the culture.
- selection and maintenance of the type of medium and management of culture conditions for example, oxygen concentration in medium, stirring speed, contamination
- monoclonal antibodies are collected from the ascites and Z or blood.
- clones are inoculated to RPMI1640 medium supplemented with ushi fetal serum to a predetermined cell density, and then cultured at 37 ° C in the presence of 5% carbon dioxide in an incubator. The culture is then inoculated into the peritoneal cavity of a mouse previously administered pristane and bred in the usual way for the desired period.
- ascites is collected, and ammonium sulfate is added to it to obtain a salting out precipitate.
- the monoclonal antibody is separated and purified from the fraction using chromatography.
- the method for isolating the monoclonal antibody from the culture or ascites and / or blood is the same as the conventional method for purifying polyclonal antibodies, and is based on the method for separating and purifying immunoglobulins. That is, salting-out method, dialysis method, filtration method, concentration, alcohol precipitation method, isoelectric point precipitation method, various electrophoresis methods, adsorption / desorption method by ion exchanger (DEAE resin, etc.), ultracentrifugation method, gel filtration method By using a specific affinity purification method in an appropriate combination.
- the produced monoclonal antibody is then concentrated and dried, and is made liquid or solid depending on the application.
- the antibody includes a humanized or humanized antibody.
- a human antibody can be produced in the same manner as a normal monoclonal antibody by immunizing a mammal whose immune system is replaced with that of a human.
- a humanized antibody is an antibody in which the constant region and a part of the variable region are human-type antibodies.
- the framework region (FR) is derived from human and has a phase called CDR.
- the complementarity determining region is derived from the mouse and is a reconstituted antibody.
- CDRs are transplanted from the variable region of the mouse antibody into the human variable region, and then these humanized reshaped human variable regions are converted into the human constant region.
- Link A method for producing humanized antibodies can be obtained by genetic engineering techniques and has been established in this field. (Kazuhisa Sugimura “Fully Antibody Antibody! All about Antibody Engineering and Antibody Medicine” Bio .2 No.4 Yodosha 2002).
- Synoviolin substrate protein P4HA1 ubiquitination is not affected. That is, it does not affect the physiological functions related to ubiquitination of P4HA1.
- the isotype of the antibody of the present invention is IgGl.
- the antibody of the present invention (for example, SL-1 antibody) can specifically recognize synoviolin or a partial peptide thereof, various forms of use are conceivable. The following are some typical uses of the SL-1 antibody as an example.
- Ubiquitination is a process in which ubiquitin-activating enzyme (E1), ubiquitin-conjugating enzyme (E2) and ubiquitin ligase (E3) jointly bind ubiquitin to a substrate protein.
- E1 ubiquitin-activating enzyme
- E2 ubiquitin-conjugating enzyme
- E3 ubiquitin ligase
- synoviolin self-ubiquitination means that synoviolin itself has a ubiquitin ligase activity, so that synoviolin itself becomes a substrate protein for ubiquitination and binds ubiquitin itself rather than other ubiquitin ligases. It is.
- Enzymes such as the above-mentioned ubiquitin-activating enzyme (E1) and ubiquitin-binding enzyme (E2) are commercially available, and these can be used as appropriate.
- E1 is in the range of 10-50 ng, preferably in the range of 20-40 ng
- E2 is 0.:! It is used in the range of -0.5 / g, preferably in the range of 0.2-0.3 g.
- Mg salts such as MgCl 2, MgS0 4, ATP, EDTA, NAF, DTT ( Jichiosurei Torr), it can be appropriately selected and used like okadaic acid. These compounds are also commercially available and are readily available.
- a buffer solution for dissolving enzymes or reagents can be any known buffer solution as long as it does not inactivate the enzyme or inhibit the reaction.
- Tris-HCl can be used.
- Synoviolin auto-ubiquitination can usually be performed under the following conditions. To a certain amount of buffer solution (pH 6-8) as a reaction solvent, add the reactants required for synoviolin auto-ubiquitination (excluding synoviolin or its active derivative); Incubate at room temperature for 5-30 minutes. Synoviolin or its active derivative or immobilized active derivative of synoviolin is then added to initiate the synoviolin self-ubiquitination reaction. Incubate for 20-120 minutes at a constant temperature of room temperature to 37 ° C, and keep a constant stop buffer (containing 0.2 M borate buffer, TritonX-100 and EDTA). The reaction is stopped by adding an amount. Then, the amount of ubiquitin bound to synoviolin or unbound ubiquitin is measured to determine the degree of self-ubiquitination. (2) Examination ⁇ Use for diagnosis, treatment effect or drug effect determination
- Synoviolin is strongly expressed in the synovial tissue of RA patients.
- antibodies that recognize Synoviolin are frequently detected in the blood of RA patients.
- synoviolin antibodies cannot be substantially detected in the blood of healthy individuals.
- Synoviolin also allows the growth of cultured synoviocytes in the in vitro mouth. Suppress. This is thought to be because Synoviolin competes with a ligand that promotes synovial cell proliferation. Based on this information, the following molecular mechanisms can be assumed. That is, the strong expression of synoviolin in synoviocytes promotes the binding of synoviolin with a synoviolin ligand that has a growth promoting effect on synoviocytes, and as a result, the proliferation of synoviocytes is promoted. And this abnormal growth of synovial cells is nothing but the pathology of RA.
- Cell proliferative diseases include, for example, rheumatoid arthritis, cancer, fibrosis, arteriosclerosis, Castleman's disease, multiple myeloma, Crohn's disease, systemic juvenile idiopathic arthritis, brain tumor, tongue cancer, pharyngeal cancer, lung cancer, breast cancer, food Tract cancer, stomach cancer, knee cancer, biliary tract cancer, gallbladder cancer, duodenal cancer, colon cancer, liver cancer, uterine cancer, ovarian cancer, prostate cancer, renal cancer, bladder cancer, rhabdomyosarcoma, fibrosarcoma, osteosarcoma, Examples include, but are not limited to, chondrosarcoma, skin cancer, acute myeloid leukemia, acute lymphocytic leukemia, chronic lymphocyte leukemia, adult ⁇ cell leukemia, and malignant
- cells are synovial cells, osteoclasts, keratinized epithelial cells, blood cells, cancer cells, bone marrow cells, fibroblasts, vascular endothelial cells, dermal cells, muscle cells, nerve cells, lymphocytes, vascular smoothness Examples include, but are not limited to, myocytes, hepatocytes, pigment cells, fat cells, uterine endothelial cells, alveolar epithelial cells, undifferentiated mesenchymal cells, ectoderm crests.
- step (ii) Step of associating the detection result of step (i) with a disease
- any of the following markers (a) to () can be used. A method for measuring these markers will be described later.
- synovial tissue growth due to RA indicates synovial tissue growth due to RA.
- protein expression can be detected by using the protein itself or the presence of mRNA carrying the information as an indicator.
- the SL-1 antibody of the present invention is preferably used. If synoviolin is detected in synovial cells, synovial tissue, etc., or in body fluids, RA is considered to have progressed.
- the reagent for immunological analysis containing the antibody of the present invention is useful not only for diagnosis of RA but also for determination of therapeutic effect or drug effect.
- the determination of the therapeutic effect or efficacy of RA is also basically performed in the same way as the diagnosis of RA.
- the level of synoviolin or its antibody in synovial tissue or blood is related to the expression of the genes encoding these proteins, and their detection is an indicator of symptom progression and disease remission. It is because it has.
- the SL-1 antibody of the present invention can be used for separation or detection of cells expressing synoviolin.
- Synoviolin is expressed in the ectoderm crest during development, and is strongly expressed in rheumatoid synovial cells, as well as in undifferentiated mesenchymal cells that are the primordium of synovium, bone, cartilage, and limbs. Yes. Therefore, Synoviolin is particularly preferably used as a marker for ectoderm crest, rheumatic synovial cells and undifferentiated mesenchymal cells.
- anti-Synoviolin-monoclonal antibody against Synoviolin can be appropriately labeled with fluorescence and reacted with cells, and cells expressing Synoviolin can be separated by cell sorting or the like.
- Isolated undifferentiated mesenchymal cells are useful for in vitro or in vivo formation of tissues such as muscle, tendon, fat and bone marrow stroma, bone / cartilage, or joint reconstruction It is.
- the reconstructed tissues and organs are expected to be used for regenerative medicine in addition to basic research.
- the antibody of the present invention may be used for preparing an antibody column for purifying synoviolin and for detecting the protein present in each fraction during purification.
- the use of the specific anti-synoviolin monoclonal antibody according to the present invention is not limited to these uses.
- the measurement method using a monoclonal antibody against synoviolin or a fragment thereof is not particularly limited to a specific method, and an antibody or antigen-antibody corresponding to the amount of antigen in the sample, that is, the amount of synopioline. Any method may be used as long as it is a measurement method in which the amount of the complex is detected by a chemical or physical means and calculated from a calibration curve prepared using a standard solution containing a known amount of antigen.
- Specific examples of methods for detecting the amount of antigen-antibody complex include competitive methods, immunometric methods, nephelometry methods, and sandwich methods. From the standpoint of sensitivity and specificity, The sandwich method is particularly preferred.
- a specimen containing synoviolin to be quantified
- the immobilized SL-1 antibody of the present invention primary reaction
- the standard After reacting the sensitized anti-synoviolin antibody (secondary reaction), the amount of synopioline in the sample can be quantified by measuring the activity of the labeling agent on the immobilized carrier.
- the primary reaction and the secondary reaction may be performed in reverse order, may be performed simultaneously, or may be performed at different times.
- the antibody used for the secondary reaction is preferably an antibody having a synoviolin binding site different from the SL-1 antibody of the present invention.
- the antigen in the sample and the immobilized antigen are subjected to a competitive reaction with a certain amount of the labeled monoclonal antibody, and then the solid phase and the liquid phase. Isolate.
- react the antigen in the sample with an excess amount of the labeled monoclonal antibody then add the immobilized antigen and bind the unreacted labeled antibody to the solid phase, and then separate the solid phase from the liquid phase. To do.
- the amount of antigen in either phase is measured to quantify the amount of antigen in the sample.
- the antigen in the sample and the labeled antigen are reacted competitively with the antibody, and then the unreacted labeled antigen (F) and the labeled antigen ( ⁇ ) bound to the antibody are separated ( ⁇ / F separation) Measure the amount of label B, F, and quantify the amount of antigen in the sample.
- a soluble antibody is used as the antibody
- a BZF separation is performed using polyethylene glycol
- a second antibody against the above antibody is used
- a solid phase antibody is used as the first antibody
- a soluble antibody may be used
- a solid-phase antibody may be used as the second antibody.
- nephrometry the amount of insoluble precipitate produced as a result of an antigen-antibody reaction in gel or solution is measured. When only a small amount of precipitate is obtained because the amount of antigen in the sample is small, laser nephrometry using laser scattering is preferably used.
- the antigen-sensitized plate is reacted with the antibodies in the sample, and the antibody to be detected captured on the plate surface is detected with a labeled antibody as a specific antigen.
- This is the most popular method for immunological analysis of antibodies (Imnmnocliemistry, 8: 871-879, 1971).
- the SL-1 antibody of the present invention may be used as a labeled antibody for detecting unbound antigen on the rate.
- a method is also known in which latex particles adsorbed with an antigen are mixed with a sample and antibodies are detected as an immunological agglutination reaction (Plotz CM & Singer JM, Am. J. Med., 21: 888-892, 1956).
- Immunological particle agglutination is a method that allows rapid analysis with one reagent, and is suitable for large-scale screening.
- an anti-sinoviolin monoclonal antibody can be combined with another solvent or solute to form a composition.
- distilled water, pH buffering reagent, salt, protein, surfactant, etc. can be combined.
- the reaction reagent has a label detectable by a suitable chemical or physical detection means.
- suitable chemical or physical detection means examples include fluorescent substances, enzymes, radioisotopes, and luminescent substances.
- an enzyme When an enzyme is used for labeling, it is called an ELISA method and is widely used.
- fluorescent substances fluorescamine, fluorescein sothiocyanate, etc.
- enzymes peroxidase, alkaline phosphatase, malate dehydration enzyme, sarcoidase, ⁇ -galactosidase, etc.
- radioisotopes 125
- a piotine-avidin system may be used for binding between the SL-1 antibody or antigen of the present invention and a labeling agent.
- a labeling agent for the immobilization of an antigen or monoclonal antibody, physical adsorption may be used, or a method using a chemical bond usually used for immobilizing or immobilizing a protein or an enzyme may be used.
- synthetic resins such as polystyrene, polyacrylamide, and silicon, insoluble polysaccharides such as agarose, dextran, and cellulose, or glass are used.
- a buffer solution useful for stabilizing the reaction product or stabilizing the reaction product a stabilizer for the reaction material, and the like are included.
- a spectroscope As the detection means, a spectroscope, a radiation detector, a light scattering detector, and the like can be detected.
- the most convenient and efficient method for this purpose is to make the above reagent into a kit.
- a kit enables efficient quantification in a normal laboratory or laboratory without the need for special analytical equipment, skilled operation, or advanced knowledge.
- the composition kit form of the assembly kit for performing the above-described various diagnostic methods or treatment determination methods is not particularly limited, and the content thereof is not limited as long as the predetermined purpose can be achieved.
- the above specimen is composed of instructions for interpreting the results obtained by executing the assembly method, reaction reagents, reaction medium in which the reaction is performed, and a substrate that provides the assembly field. Is done.
- a reference sample for use as a comparison standard or for creating a calibration curve, a detector, and the like may be included.
- the antibody of the present invention is useful as a pharmaceutical composition for treating or preventing a cell proliferative disease.
- cell proliferative diseases include rheumatoid arthritis, cancer, fibrosis, arteriosclerosis, Castleman's disease, multiple myeloma, Crohn's disease, systemic juvenile idiopathic arthritis, brain tumor, tongue cancer, pharyngeal cancer, lung cancer, breast cancer, Esophageal cancer, stomach cancer, spleen cancer, biliary tract cancer, gallbladder cancer, duodenal cancer, colorectal cancer, liver cancer, uterine cancer, ovarian cancer, prostate cancer, renal cancer, bladder cancer, rhabdomyosarcoma, linear fibrosarcoma, osteosarcoma, Examples include chondrosarcoma, skin cancer, acute myeloid leukemia, acute lymphocytic leukemia, chronic lymphocyte leukemia, adult T-cell leukemia, and malignant lymphoma.
- the pharmaceutical composition of the present invention is preferably provided in the form of a pharmaceutical composition comprising the antibody of the present invention or a fragment thereof as an active ingredient, and further comprising a pharmaceutically acceptable carrier.
- pharmaceutically acceptable carrier refers to excipients, diluents, bulking agents, disintegrating agents, stabilizers, preservatives, buffers, emulsifiers, fragrances, coloring agents, sweeteners, viscous Agents, flavoring agents, solubilizing agents or other additives.
- injections, solutions, force pushers, suspensions, emulsions or syrups A pharmaceutical composition in the form of a powder or the like can be prepared.
- These pharmaceutical compositions can be administered orally or parenterally.
- Other forms for parenteral administration include injections that contain one or more active substances and are prescribed by conventional methods.
- the dose of the drug of the present invention varies depending on the patient's age, sex, weight and symptoms, therapeutic effect, administration method, treatment time, or the type of high affinity antibody which is an active ingredient contained in the drug. In general, it can be administered within a range of 600 ig to 6000 mg, preferably 6 to 600 mg per adult, but is not limited to this range.
- the concentration is 1 mg antibody / ml carrier to 100 mg antibody / ml carrier in a pharmaceutically acceptable carrier such as physiological saline or commercially available distilled water for injection. So that it can be dissolved or suspended.
- the thus-prepared injection is administered to human patients in need of treatment at a ratio of 10 wg to 100 mg per kg body weight in a single administration, preferably 100 g to 10 mg. Can be administered once to several times per day.
- the administration mode include intravenous injection, subcutaneous injection, intradermal injection, intramuscular injection, intraperitoneal injection, and the like. Power is preferably intravenous injection.
- injections may be prepared as non-aqueous diluents (eg, propylene glycol, polyethylene glycol, vegetable oils such as olive oil, alcohols such as ethanol, etc.), suspensions or emulsions. You can also.
- non-aqueous diluents eg, propylene glycol, polyethylene glycol, vegetable oils such as olive oil, alcohols such as ethanol, etc.
- Such injection can be sterilized by filter sterilization using a filter, blending of a bactericide and the like.
- An injection can be produced as a form of preparation at the time of use. That is, it can be used as a sterile solid composition by lyophilization, etc., and dissolved in sterile water for injection or other solvents before use.
- % means “% by weight”.
- Example 1 The purpose of this example is to produce an anti-sinoviolin monoclonal antibody.
- Anti-Synoviolin Monoclonal antibodies were prepared by synthesizing three types of peptides containing the following partial amino acid sequences of human synoviolin as immunization peptides. These amino acid sequences are selected from the region presumed to have antigenicity.
- Mothamine was bound to each synthetic peptide via Cys in the amino acid sequence.
- 50 of each synthetic peptide conjugated with KLH was dissolved in 0.1 ml physiological saline, and 0.1 ml of Freund's complete adjuvant (FCA) was added to prepare an immunogen.
- FCA Freund's complete adjuvant
- Each immunogen was immunized by injecting 0.2 ml subcutaneously into the back of 8 mice (BALB / c female, 5 weeks old). Immunization was performed 4 times every 2 weeks, and one week later, another immunization was performed. Eight days after the final immunization, blood was collected from the heart, and 200 ⁇ 200 or more of serum was collected. Spleen cells were collected from individuals who were able to confirm an increase in antibody titer by ELISA, and cell fusion was performed.
- Antibody titers were measured by ELISA for 3 mouse sera for each immunogen. Using either immunogen, individuals with increased antibody titers were identified. All of these immunogens were confirmed to be useful as synoviolin immunogens.
- the myeloma cell line (P3U1) and mouse spleen cells were mixed at 1:10, and cell fusion was performed in the presence of 50% PEG (Wako Pure Chemical Industries, Ltd. PEG1540). After the fusion, the cells were plated on a 96-well plate so that the number of splenocytes was 5 ⁇ 10 5 cells / ml. After culturing in HAT medium for 10-14 days, cell growth was confirmed and the culture supernatant was assayed.
- an ELISA plate on which each synthetic peptide was immobilized was used.
- the operation of the test is as follows. After reacting the culture supernatant to an ELISA plate, positive wells were selected using anti-mouse IgG goat-peroxidase (POX). The cells to be subjected to crawling were selected, and other positive cells were stored frozen. Several days later, one 96-well plate per strain was seeded at 100 cells / plate (20 cells / ml) and cultured for 10-14 days. Colonies were determined and the culture supernatant was assayed. The culture supernatant was assayed by applying the supernatant 501 to the antigen-immobilized ELISA plate for screening.
- POX anti-mouse IgG goat-peroxidase
- Anti-mouse IgG goat-POX was used as the second antibody.
- the selected colonies were recloned after culturing and cultured for 10 to 14 days, and colony determination and culture supernatant assay were performed as described above.
- Wells were selected for each parent strain, cultured on 24 well plates, supernatants were collected, clones were checked, and antibody subclasses and antibody production were assayed.
- clonal SL-1 obtained using Syno-P2 as an immunogen was selected as a hybridoma that efficiently produces a monoclonal antibody having an extremely high affinity for Synoviolin.
- the purpose of this example is to detect synoviolin in patient samples using anti-synoviolin monoclonal antibodies.
- the synovial cell protein from patients with rheumatoid arthritis was separated by SDS-PAGE, and Western blotting was performed. went.
- the Western blotting method was performed using the SL-1 antibody of Example 1 as the antibody and anti-mouse IgG Hedge-HRP as the labeled antibody.
- synovial cells from osteoarthritis patients were also analyzed.
- a specific signal was detected in synovial cells derived from RA patients (Fig. 1 “RA” in lanes 1 and 2, bands near 85 kDa). It was confirmed that the SL-1 antibody obtained in Example 1 recognizes synopioline more specifically.
- SL-1 antibody immunostaining of synovial tissue sections collected from RA patients was performed.
- the immunostaining procedure described in Example 9 of WO02 / 052007 pamphlet was performed except that the SL-1 antibody of Example 1 was used as the antibody and anti-mouse IgG Hedge-HRP was used as the labeled antibody. It is as follows. Synopioline was strongly expressed in synovial tissue from RA patients (Fig. 3 SL-1 antibody panel). Simultaneously with HE staining, synovial cell proliferation was observed, confirming that the portion was stained with monoclonal antibodies. From these results, it was confirmed that the SL-1 antibody of the present invention specifically recognizes synoviolin in the synovial tissue of RA patients (Fig. 3, HE-stained panel).
- the detection and diagnosis of RA can be carried out by detecting synoviolin in a patient sample using an anti-synoviolin antibody.
- the purpose of this example is to develop an ELISA test agent for detecting synoviolin.
- polyclonal antibodies were prepared by immunization of rabbits with Synoviolin based on a conventional method.
- This polyclonal antibody was purified by gel filtration chromatography using Sephacryl S-300HR (Pharmacia), labeled with horseradish peroxidase (HRP) by the periodate oxidation method and pre-equilibrated with PBS.
- HRP horseradish peroxidase
- This secondary labeled antibody was a composition of a buffer reagent containing salt, stabilizer, preservative and the like.
- the 96-well microplate having the solid phase SL-1 antibody thus obtained is dispensed with appropriately diluted patient blood, urine and other body fluids or tissues according to normal EIA. It was allowed to act for 1 hour at room temperature. At this time, only the diluent was added to control the tool. After washing with a phosphate buffer containing 0.05% Tween20, an HRP-labeled anti-mouse IgG rabbit antibody was added and allowed to react at room temperature for 30 minutes. After washing unreacted secondary labeled antibody with phosphate buffer containing 0.05% Tween20, 0.1M citrate buffer containing 0.015% hydrogen peroxide as substrate buffer, and 0-Furinary diamide as stain.
- Nukenate buffer (10 mg / ml) was added to each tool and allowed to react at room temperature for 30 minutes, and then 2 M sulfuric acid was added to stop the color reaction. Next, coloration was determined by measuring the absorbance at 492 nm with a microplate reader to determine the amount of synoviolin in the sample.
- synoviolin is an E3 ubiquitin-protein ligase with a RING finger motif, and the RING finger motif is thought to be the binding site for E2 ruppi: chitin conjugating enzymes.
- E3 ubiquitin-protein ligase is known to self-ubiquitinate and has been experimentally confirmed for synoviolin auto-ubiquitination.
- SL-1 is a mouse monoclonal antibody that uses a peptide corresponding to amino acids 328 to 342 in the RING finger region of Synoviolin protein as an antigen. (Example 1). Using His-tagged protein MBP-dTM Syno-His, antigen-antibody reaction was performed at 4 ° C for 1.5 hours by mixing with a constant concentration of SL-1 antibody, anti-FLAG antibody or mouse IgG.
- synoviolin autobiubilation was examined using an in vitro ubiquitination reaction system.
- E1 derived from yeast
- E2 UbcH5c
- ATP ATP
- GST-HA-ubiquitin GST-HA-ubiquitin
- MBP-dTM Syno-His previously reacted with the antibody were mixed and reacted at 37 ° C for 120 minutes.
- 4 x SDS-PAGE buffer solution was added to each sample after reaction, boiled for 5 minutes, and then developed on 10% SDS-PAGE. Then, Western blotting analysis was used to detect synoviolin ubiquitinated bands using SL-1 antibody.
- the purpose of this example is to examine whether SL-1 antibody also affects synovioline ubiquitination.
- Ubiquitin is covalently bound to the target protein (substrate) by the ubiquitin system consisting of activating enzyme (E1), binding enzyme (E2), and ligase (E3), and the polyubiquitin chain formed by repeating this reaction is It acts as a force of degradation by the proteasome.
- P4HA1 a subunit of prolyl hydroxylase, an enzyme that catalyzes the hydroxylation of proline residues of collagen, which is essential for collagen production, has been found to be a substrate for synoviolin. Since SL-1 antibody has been found to inhibit synoviolin's self-ubiquitination activity, We investigated whether this antibody also affects the ubiquitination of P4HA1 by synoviolin.
- MBP-dTM Syno-His was mixed with a constant concentration of SL_1 antibody, anti-FLAG antibody or mouse IgG, and antigen-antibody reaction was performed at 4 ° C for 1.5 hours. Then, in vitro ubiquitination reaction system, 1 ix GST-fused P4HA1 protein GST-P4HA1 was transformed into E1 (yeast derived), E2 (UbcH5c), ATP, GST-HA-ubiquitin and each MBP- The mixture was mixed with dTM Syno-His and reacted at 37 ° C for 120 minutes. 4 x SDS-PAGE buffer was added to each sample after reaction, boiled for 5 minutes, and then developed on 10% SDS-PAGE. The ubiquitinated band of P4HA1 was detected with an anti-GST antibody by Western plotting analysis.
- the discovery of autoantibodies that recognize Synoviolin in the blood of RA patients provides a completely new approach to the diagnosis of RA. Therefore, the pharmaceutical composition containing the antibody of the present invention can present an unprecedented new approach in the development of RA treatment methods and the like.
- a cell producing the above antibody, and the above monoclonal antibody A synopioline-containing cell detection kit utilizing the above is also provided.
- Synoviolin genes involved in synovial development and bone / cartilage limb development are involved in the pathogenesis of RA, and antibodies to this gene product are produced in RA patients.
- the SL-1 antibody of the present invention can be used for specific detection and quantification of synoviolin, which is a useful marker for diagnosis of RA, and its antibody frequently found in patient sera. It contributes to diagnosis and judgment of therapeutic effect.
- the SL-1 antibody of the present invention can recover undifferentiated mesenchymal cells from embryonic cells using synoviolin as a cell marker. Can contribute to various applications.
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Abstract
Description
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Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU2005260424A AU2005260424A1 (en) | 2004-07-02 | 2005-07-04 | Anti-synoviolin antibody |
JP2006529014A JPWO2006004207A1 (ja) | 2004-07-02 | 2005-07-04 | 抗シノビオリン抗体 |
US11/631,283 US20080305499A1 (en) | 2004-07-02 | 2005-07-04 | Anti-Synoviolin Antibody |
CA002572321A CA2572321A1 (en) | 2004-07-02 | 2005-07-04 | Anti-synoviolin antibody |
EP05758020A EP1780221A4 (en) | 2004-07-02 | 2005-07-04 | ANTI-SYNOVIOLIN ANTIBODY |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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JP2004-197010 | 2004-07-02 | ||
JP2004197010 | 2004-07-02 |
Publications (1)
Publication Number | Publication Date |
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WO2006004207A1 true WO2006004207A1 (ja) | 2006-01-12 |
Family
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PCT/JP2005/012706 WO2006004207A1 (ja) | 2004-07-02 | 2005-07-04 | 抗シノビオリン抗体 |
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Country | Link |
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US (1) | US20080305499A1 (ja) |
EP (1) | EP1780221A4 (ja) |
JP (1) | JPWO2006004207A1 (ja) |
KR (1) | KR20070042994A (ja) |
CN (1) | CN101018810A (ja) |
AU (1) | AU2005260424A1 (ja) |
CA (1) | CA2572321A1 (ja) |
WO (1) | WO2006004207A1 (ja) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2006137514A1 (ja) * | 2005-06-23 | 2006-12-28 | Locomogene, Inc. | シノビオリンの発現もしくは機能阻害物質を有効成分とする癌治療剤、および癌治療剤のスクリーニング方法 |
WO2007072977A1 (ja) * | 2005-12-20 | 2007-06-28 | Locomogene, Inc. | アレルギー性疾患用医薬組成物 |
WO2014103862A1 (ja) * | 2012-12-26 | 2014-07-03 | Nakajima Toshihiro | 肥満症予防又は治療剤,リウマチの予防又は治療剤 |
Families Citing this family (1)
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WO2012176860A1 (ja) * | 2011-06-22 | 2012-12-27 | Nakajima Toshihiro | 体重調節作用を有する物質をスクリーニングするための方法 |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
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WO2002052007A1 (fr) * | 2000-12-22 | 2002-07-04 | Locomogene, Inc. | Proteine de cellule de membrane synoviale |
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WO2005118841A1 (ja) * | 2004-06-02 | 2005-12-15 | Locomogene, Inc. | シノビオリンのユビキチン化のアッセイ及びスクリーニングへの利用 |
-
2005
- 2005-07-04 KR KR1020077002528A patent/KR20070042994A/ko not_active Ceased
- 2005-07-04 WO PCT/JP2005/012706 patent/WO2006004207A1/ja not_active Application Discontinuation
- 2005-07-04 CA CA002572321A patent/CA2572321A1/en not_active Abandoned
- 2005-07-04 JP JP2006529014A patent/JPWO2006004207A1/ja not_active Abandoned
- 2005-07-04 CN CNA2005800296086A patent/CN101018810A/zh active Pending
- 2005-07-04 EP EP05758020A patent/EP1780221A4/en not_active Withdrawn
- 2005-07-04 US US11/631,283 patent/US20080305499A1/en not_active Abandoned
- 2005-07-04 AU AU2005260424A patent/AU2005260424A1/en not_active Abandoned
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2002052007A1 (fr) * | 2000-12-22 | 2002-07-04 | Locomogene, Inc. | Proteine de cellule de membrane synoviale |
Non-Patent Citations (2)
Title |
---|
AMANO T. ET AL: "Synoviolin/Hrdl, an E3 ubiquitin ligase, as a novel pathogenic factor for arthropathy", GENES DEV, vol. 17, no. 19, 2003, pages 2436 - 2449, XP002275253 * |
See also references of EP1780221A4 * |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2006137514A1 (ja) * | 2005-06-23 | 2006-12-28 | Locomogene, Inc. | シノビオリンの発現もしくは機能阻害物質を有効成分とする癌治療剤、および癌治療剤のスクリーニング方法 |
WO2007072977A1 (ja) * | 2005-12-20 | 2007-06-28 | Locomogene, Inc. | アレルギー性疾患用医薬組成物 |
WO2014103862A1 (ja) * | 2012-12-26 | 2014-07-03 | Nakajima Toshihiro | 肥満症予防又は治療剤,リウマチの予防又は治療剤 |
JPWO2014103862A1 (ja) * | 2012-12-26 | 2017-01-12 | 中島 利博 | 肥満症予防又は治療剤,リウマチの予防又は治療剤 |
Also Published As
Publication number | Publication date |
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CA2572321A1 (en) | 2006-01-12 |
EP1780221A1 (en) | 2007-05-02 |
JPWO2006004207A1 (ja) | 2008-04-24 |
KR20070042994A (ko) | 2007-04-24 |
EP1780221A4 (en) | 2007-10-03 |
AU2005260424A1 (en) | 2006-01-12 |
US20080305499A1 (en) | 2008-12-11 |
CN101018810A (zh) | 2007-08-15 |
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