WO2005025616A1 - 抗体の用途 - Google Patents
抗体の用途 Download PDFInfo
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- WO2005025616A1 WO2005025616A1 PCT/JP2004/013397 JP2004013397W WO2005025616A1 WO 2005025616 A1 WO2005025616 A1 WO 2005025616A1 JP 2004013397 W JP2004013397 W JP 2004013397W WO 2005025616 A1 WO2005025616 A1 WO 2005025616A1
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- amyloid
- amino acid
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- antibody
- acid sequence
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- 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
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P25/00—Drugs for disorders of the nervous system
- A61P25/28—Drugs for disorders of the nervous system for treating neurodegenerative disorders of the central nervous system, e.g. nootropic agents, cognition enhancers, drugs for treating Alzheimer's disease or other forms of dementia
Definitions
- the present invention relates to a prophylactic / therapeutic agent or a diagnostic agent for Alzheimer's disease and the like.
- the present invention relates to a prophylactic / therapeutic agent such as Alzheimer's disease or a diagnostic agent containing a monoclonal antibody which specifically reacts with a partial peptide at the C-terminal side of j3-amyloid ( ⁇ ) or a derivative thereof.
- a prophylactic / therapeutic agent such as Alzheimer's disease or a diagnostic agent containing a monoclonal antibody which specifically reacts with a partial peptide at the C-terminal side of j3-amyloid ( ⁇ ) or a derivative thereof.
- Senile dementia due to Alzheimer's disease is a major social problem, and early establishment of prevention and treatment methods for Alzheimer's disease is desired.
- Excessive formation of senile plaque amyloid and neurofibrillary tangles are known as characteristic lesions in the brain of patients with Alzheimer's disease.
- one of the main components of senile plaques is / 3-amyloid or Its derivatives.
- Amyloid is a peptide consisting of about 40 to 43 amino acids, and is encoded in the vicinity of the transmembrane region of Amyloid Precursor Protein (hereinafter referred to as APP).
- the amino acid sequence of each iS-amyloid is as follows.
- Amyloid (1-42) SEQ ID NO: 5
- amyloid 1-42
- amyloid (1-40) is mainly deposited in cerebral blood vessels.
- Amyloid angiopathy has been reported [Aichibop Biochemistry and Biophysics (Arch. Biochem. Biophys.), 301, 41.53, 1993], j3-amyloid (1-42), ⁇ -amyloid (26-42), ⁇ -amyloid (26-43), amyloid (
- WO 94/17197 reports a method for measuring i3-amyloid having a C-terminal hydrophobic region using an antibody that specifically reacts with the partial peptide described in WO 94/17197. The direct preventive and therapeutic effects of Alzheimer's disease are not known.
- CAA brain amyloid angiopathy
- amyloid may be one of the causative agents of Alzheimer's disease, and despite profound interest in j3-amyloid, effective prevention and treatment have not yet been established. is there.
- antibodies that specifically react with partial peptides at the N-terminal, middle, or; 3-amyloid (X-40) C-terminal Considering, for example, the risk of inflammation of monoamyloid (X-40) (CAA) deposited on the cerebral vascular wall and risk of intracerebral hemorrhage, Alzheimer's disease is not always sufficiently safe. It cannot be said that it is a prevention and treatment method.
- the present inventors have conducted intensive studies in order to solve the above-mentioned problems, and as a result, have found that a monoclonal antibody BC-05a that specifically reacts with a partial peptide at the C-terminal side of monoamide is used for Alzheimer's disease.
- a monoclonal antibody BC-05a that specifically reacts with a partial peptide at the C-terminal side of monoamide is used for Alzheimer's disease.
- (1) Contains a monoclonal antibody that specifically reacts with the C-terminal partial peptide of i3-amyloid or a derivative thereof and does not recognize the partial peptide having the amino acid sequence represented by SEQ ID NO: 8.
- the agent according to the above (1) which is an agent for preventing and treating Alzheimer's disease.
- the i3-amyloid is a peptide having an amino acid sequence represented by SEQ ID NO: 1, SEQ ID NO: 2, SEQ ID NO: 3, SEQ ID NO: 4, SEQ ID NO: 5, or SEQ ID NO: 6 (1) the agent described in
- a derivative of one amyloid is a peptide having the amino acid sequence of the 2nd to 42nd amino acids of the amino acid sequence represented by SEQ ID NO: 5, 3rd to 42nd of the amino acid sequence represented by SEQ ID NO: 5
- a peptide having an amino acid sequence lacking the 1st to 10th amino acid sequence from each of the amino acid sequences represented by SEQ ID NO: 1 to SEQ ID NO: 6 The agent according to the above (1), which is a peptide in which glutamic acid at the N-terminus has been converted to pyroglutamic acid.
- the agent according to the above (14), wherein the antibody is an antibody capable of extracting / 3-amyloid from the formed senile plaques;
- a monoclonal which specifically reacts with a C-terminal partial peptide of amyloid or a derivative thereof in a mammal and does not recognize a partial peptide having an amino acid sequence represented by SEQ ID NO: 8
- SEQ ID NO: 8 A monoclonal which specifically reacts with a C-terminal partial peptide of amyloid or a derivative thereof in a mammal and does not recognize a partial peptide having an amino acid sequence represented by SEQ ID NO: 8
- Prevention of Alzheimer's disease, mild cognitive impairment or cerebral amyloid angiopathy characterized by administering an effective amount of an antibody.
- the antibody has the amino acid sequence represented by SEQ ID NO: 5], recognizes 3-amyloid (1-42), but has the amino acid sequence represented by SEQ ID NO: 1/3/3 amyloid (1 — 38) having the amino acid sequence represented by SEQ ID NO: 2; having the amino acid sequence represented by 8—amyloid (1_39) and SEQ ID NO: 3
- BA-27 was established on January 22, 1992 by the Fermentation Research Institute (IFO) (Yodogawa-ku, Osaka-shi, Osaka, Japan). 13-17-85 (Postal Code 532-8686)) as I FO 50387 from January 7, 1993, Ministry of International Trade and Industry, National Institute of Advanced Industrial Science and Technology (NIBH) (currently independent It has been deposited as FERM BP-41 39 at the Patent Organism Depositary, the National Institute of Advanced Industrial Science and Technology (11-11 Central Higashi, Tsukuba, Ibaraki Prefecture, Japan).
- IFO Fermentation Research Institute
- NIBH National Institute of Advanced Industrial Science and Technology
- BC-05 was established on January 2, 1993 by the National Institute of Advanced Industrial Science and Technology, National Institute of Advanced Industrial Science and Technology (NI BH).
- FERM BP-4457 is currently deposited at the National Institute of Advanced Industrial Science and Technology (AIST), Patent Organism Depositary (Tsukuba, Higashi, 111-1-1, Chuo No. 6 (Zip code 305-85 66)) .
- antibodies obtained from each hybridoma cell are indicated by adding a to the end of the cell name.
- SEQ ID NOs: 1 to 9 represent the amino acid sequences of the following peptides.
- the left end is the ⁇ end (amino end) and the right end is the C end (carboxyl end) according to the II example of peptide description.
- the protein used in the present invention including the polypeptide containing the amino acid sequence represented by SEQ ID NO: 1, may have a C-terminus of any of a carboxyl group, carboxylate, amide or ester.
- 3-amyloid in the present invention examples include i8_amyloid (1-38) having an amino acid sequence represented by SEQ ID NO: 1, and -amyloid (1-3) having an amino acid sequence represented by SEQ ID NO: 2. 9) an amyloid (1-40) having an amino acid sequence represented by SEQ ID NO: 3; an i3-amyloid (1_41) having an amino acid sequence represented by SEQ ID NO: 4; 3-Amyloid (1-42) having an amino acid sequence represented by SEQ ID NO: 6 or amyloid (1-43) having an amino acid sequence represented by SEQ ID NO: 6 (preferably SEQ ID NO: 5 J8-amyloid (1-42) having the amino acid sequence represented is used.
- the derivatives of] 3-amyloid according to the present invention include those in which the amino acid at the N-terminal of the above-mentioned] 3-amyloid is missing about 1 to 17 residues, L-aspartic acid is L-isospartic acid, -Isomerized to isospartic acid or D-aspartic acid; one having pyroglutamic acid at the N-terminal; the amino acid sequence of the above j3-amino acid which lacks the first to tenth amino acids from the N-terminal. For example, a peptide having N-terminal glutamic acid converted to pyroglutamic acid is used.
- a peptide having the second to fourth amino acid sequence of the amino acid sequence represented by SEQ ID NO: 5, the third to 42nd amino acid sequence of the amino acid sequence represented by SEQ ID NO: 5 A peptide having the amino acid sequence of SEQ ID NO: 5 wherein glutamate at the N-terminus has been converted to pyroglutamic acid; A peptide having the fourth to fourth amino acid sequence of the sequence, SEQ ID NO: 1 to SEQ ID NO: 1st to 16th amino acid sequence or 1st to 1st amino acid sequence represented by SEQ ID NO: 6
- Peptides having an amino acid sequence lacking the seventh amino acid sequence for example, -amyloid (17-40),; 3-amyloid (18-40), etc.
- These / 9-amyloid or a derivative thereof can be prepared by a method known per se from mammals such as humans, monkeys, rats and mice, or a commercially available natural purified preparation. Alternatively, a synthetic peptide may be used.
- Examples of the partial peptide on the C-terminal side of the / 3-amyloid or a derivative thereof in the present invention include a partial peptide having an amino acid sequence at the 25th position or more counted from the N-terminal amino acid of one amyloid.
- the above-mentioned] 3-amyloid or a derivative thereof is, for example, a salt (preferably physiologically acceptable) with a physiologically acceptable acid (eg, an inorganic acid or an organic acid) or a base (eg, an alkali metal salt).
- a physiologically acceptable acid eg, an inorganic acid or an organic acid
- a base eg, an alkali metal salt
- salts with inorganic acids eg, hydrochloric acid, phosphoric acid, hydrobromic acid, sulfuric acid
- organic acids eg, Salts with acetic acid, formic acid, propionic acid, fumaric acid, maleic acid, succinic acid, tartaric acid, citric acid, malic acid, oxalic acid, benzoic acid, methanesulfonic acid, benzenesulfonic acid, etc. are used.
- a monoclonal nanoreactive antibody (hereinafter, sometimes simply referred to as an antibody) that specifically reacts with a partial peptide on the C-terminal side of one amyloid or a derivative thereof, for example, recognizes one amyloid or a derivative thereof.
- an antibody that does not recognize a partial peptide having the amino acid sequence represented by SEQ ID NO: 7 ie, a partial peptide on the N-terminal side of j9-amyloid represented by i3-amyloid (112)
- SEQ ID NO: 7 ie, a partial peptide on the N-terminal side of j9-amyloid represented by i3-amyloid (112)
- a partial peptide that recognizes 3-amyloid or a derivative thereof but has an amino acid sequence represented by SEQ ID NO: 8 (that is, represented by a single amyloid (25-35))
- SEQ ID NO: 9 ie, J3-amyloid (35-43)
- an antibody that specifically recognizes amyloid (1-40) having the amino acid sequence represented by SEQ ID NO: 3 is preferable, and more preferably an amyloid (1-3) having the amino acid sequence represented by SEQ ID NO: 1 8) recognizes an amyloid (1 to 39) having an amino acid sequence represented by SEQ ID NO: 2, and an amyloid (1 to 40) having an amino acid sequence represented by SEQ ID NO: 3, It has an amino acid sequence represented by SEQ ID NO: 5.] An antibody that does not recognize 3_amyloid (1-42) is preferable.
- i3-amyloid contained in a brain formic acid extract of an Alzheimer's disease patient
- Antibodies that do not recognize (i) are preferred.
- a typical example of the above-mentioned antibody (i) is a monoclonal antibody denoted by BA-27a (see WO 94/17197), and a typical example of the above-mentioned antibody (ii) is BC — A monoclonal antibody (WO5a, BC—15a, BC—65a, BC—75a, BC55a (particularly BC-05a is preferred)) 94/17197).
- a method known per se for example, the method described in WO 94/17197 or a method analogous thereto can be used. Is shown.
- Examples of the antigen used for preparing the antibody of the present invention include:] 3-amyloid or a derivative thereof; a partial peptide obtained by hydrolyzing 3-amyloid or a derivative thereof, and the same as] 3-amyloid.
- Any peptide such as a synthetic peptide having one or more antigenic determinants can be used (hereinafter, these may be simply referred to as
- the / 3-amyloid or a derivative thereof those described above are used.
- These ⁇ -amyloids or derivatives thereof can be prepared from mammals such as humans, monkeys, rats and mice using methods known per se or a method analogous thereto, or commercially available purified natural products. There may be. Further, a synthetic peptide may be used.
- 3-amyloid or a derivative thereof or a salt thereof can be produced according to a known method, for example, a method described in WO 02/06483. Further, (a) for example, human, monkey, rat, mouse (B) chemically synthesized by a known peptide synthesis method using a peptide 'synthesizer, etc., and (c) a desired method. It can also be produced by culturing a transformant containing a DNA encoding a polypeptide containing an amino acid sequence or a salt thereof.
- the cloning method comprises the steps of (1) using a DNA probe or a DNA primer designed based on the amino acid sequence of a polypeptide containing a desired amino acid sequence or a salt thereof, and performing hybridization from a cDNA library by a hybridization method.
- a method for obtaining a transformant containing DNA encoding a polypeptide containing a desired amino acid sequence or a salt thereof, or (2) a polypeptide containing a desired amino acid sequence or an amino acid of a salt thereof A method using a DNA primer designed on the basis of a sequence to obtain a transformant containing a DNA encoding a polypeptide containing a desired amino acid sequence or a salt thereof by a PCR method, and the like.
- Examples of the partial peptide obtained by hydrolyzing the 3-amyloid include amino amyloid (1-43) having an amino acid sequence represented by SEQ ID NO: 6 and the like.
- a partial peptide obtained by sequentially hydrolyzing from the N-terminal and / or C-terminal by an exoproteinase such as a peptidase or a mixture thereof, or / 3-amyloid (1-43) is converted into various endopeptidases.
- a partial peptide obtained by hydrolysis with an enzyme or a mixture thereof is used.
- amyloid (1-42) was prepared by this method, / 3- amyloid (1-141) and / or] 3_amyloid (144) were mixed in the sample. There are cases.
- Examples of the synthetic peptide include those having the same structure as the above-mentioned naturally-purified i3-amyloid antigen, and those having three or more, preferably six or more in the amino acid sequence of one amyloid (1_43).
- Peptides containing one or more amino acid sequences identical to the amino acid sequence at any position consisting of amino acids (hereinafter abbreviated to 3-amyloid-related synthetic peptide) and the like are used. It can be produced by a conventional method, and can be produced by either a solid phase synthesis method or a liquid phase synthesis method. That is, the partial peptide or amino acid capable of constituting the peptide is condensed with the remainder to protect the product.
- the desired peptide can be produced by removing the protecting group.
- protecting groups include, for example, B. Merrifield (Journal of American Chemical Society (J. Am. Chem. Soc.), 85.2149 (1963)), M. Bodanszky Pop MA Ondetti (Peptide Synthesis, Peptide Synthesis), Interscience Publishers, New York, 1966), Schroder and Lubke (The Peptide), Academic Press, New York, 1965, Izumiya Nobuo et al.
- 3-amyloid is obtained by: synthesizing a 3-amyloid-related synthetic peptide.
- the amino group is protected with a Boc group
- the hydroxyl group of serine and threonine is protected with a Bz1 group
- the ⁇ -carboxyl group of glutamic acid and aspartic acid is OB ⁇ .
- Protected with one group, the ⁇ -amino group of lysine is C
- a commercially available resin for peptide synthesis suitable for amide formation can be used.
- examples of such a luster include chloromethinole resin, hydroxymethyl resin, benzhydrylamine resin, aminomethyl resin, and 4-benzylo resin.
- an amino acid in which a monoamino group and a side chain functional group are appropriately protected is condensed on the resin in accordance with the sequence of the desired peptide according to various known condensation methods.
- the peptide is cleaved from the resin, and at the same time, various protecting groups are removed to obtain the desired peptide.
- a partially protected peptide may be taken out using a trityl resin, oxime resin, 4-hydroxybenzoic acid resin or the like, and the protecting group may be removed by conventional means to obtain the desired peptide. it can.
- carbodiimides are particularly preferable.
- carbodiimides include DCC, N, N'-diisopropylcarbodiimid, N-ethyl-N '-(3-dimethylaminoprolyl) carbodiimid, and the like.
- Activation by these involves adding the protected amino acid directly to the resin along with a racemization inhibitor additive (eg, HOBt, HOOBt, etc.), or symmetric acid anhydride or HOBt ester or H ⁇ OBt.
- a racemization inhibitor additive eg, HOBt, HOOBt, etc.
- symmetric acid anhydride or HOBt ester or H ⁇ OBt Activation of the previously protected amino acid as an ester can be added to the resin after activation.
- the solvent used for activating the protected amino acid or condensing with the resin can be appropriately selected from solvents known to be usable for peptide condensation reaction.
- acid amides such as N, N-dimethylformamide, N, N-dimethylacetamide, and N-methylpyrrolidone
- hachigenated hydrocarbons such as methylene chloride and chloroform
- Alcohols such as ethanol, sulfoxides such as dimethyl sulfoxide, tertiary amines such as pyridine, ethers such as dioxane and tetrahydrofuran, nitriles such as acetonitrile and propionitrile, methyl acetate, ethyl acetate and the like Esters or an appropriate mixture thereof are used.
- the reaction temperature is appropriately selected from a range known to be usable for peptide bond formation reactions, and is usually appropriately selected from a range of about ⁇ 20 ° C. to about 50 ° C. Life
- the sensitized amino acid derivative is usually used in about 1.5 to about 4-fold excess.
- protecting groups for the amino group of the starting amino acid include Z, Boc, tertiary pentyloxycarbonyl, isobornyloxycarbonyl, 4-methoxybenzyloxycarbonyl, C11Z, Br ____________________________________________________________________ either-either, _Z, adamanchinoleoxy canoleponol, trifluoroacetyl, phthaloinole, forminole, 2-nitrophenylsulfeninole, dipheninolephosphinothioinole, Fmoc, etc. are mentioned.
- Examples of protecting groups for Kanoreboki sill group for example C l-6 alkyl group, C 3 - 8 cycloalkyl group, C 7 - 14 Ararukiru group, 2 Adamanchinore, 4 twelve Torobenjiru, 4-main Tokishiben Jill, 4 one black port Benzyl, naphthyl, benzyloxycarbonyl hydrazide, tert-butoxycarbonyl hydrazide, trityl hydrazide and the like.
- the hydroxyl groups of serine and threonine can be protected, for example, by esterification or etherification.
- Suitable groups for this esterification include, for example, lower (d-6) alkanol groups such as acetyl group, aroyl groups such as benzoyl group, and groups derived from carbonic acid such as benzyloxycarbonyl group and ethoxycarbonyl group. Is mentioned.
- groups suitable for etherification include, for example, a benzyl group, a tetrahydroviranyl group, a t-butyl group and the like.
- phenolic hydroxyl-protecting group of tyrosine examples include Bz1, C11-Bz1,2-ditrobenzyl, Br-Z, t-butyl and the like.
- Examples of the protecting group for imidazole of histidine include Tos, 4-methoxy-1,2,3,6-trimethinolebenzenesnoreffoninole, DNP, Bom, Bum, Boc, Trt, and Fmoc. Can be
- Activated carboxyl groups of the raw materials include, for example, the corresponding acid anhydride, azide, active ester [alcohol (eg, pentachlorophenol, Esters with 2,4,5-trichlorophenol, 2,4-dinitrophenol, cyanometinoleanol, paranitolephenol, HONB, N-hydroxysuccinimide, N-hydroxyphthalimide, HOBt) ] And the like.
- the activated amino group of the raw material includes, for example, the corresponding phosphoramide.
- Methods for removing (eliminating) protecting groups include catalytic reduction in the presence of a catalyst such as Pd-black or Pd-carbon, in a stream of hydrogen, hydrogen fluoride anhydride, methanesulfonic acid, Acid treatment with trifluoromethanesulfonic acid, trifluoroacetic acid or a mixture thereof, base treatment with diisopropylethylamine, triethylamine, piperidine, piperazine, etc., reduction with sodium in liquid ammonium, etc. No.
- a catalyst such as Pd-black or Pd-carbon
- the elimination reaction by the above-mentioned acid treatment is generally carried out at a temperature of 120 ° C to 40 ° C, but in the acid treatment, anisol, phenol, thioanisol, methacrylone, methacrylone, dimethyl sulfide, Addition of a cation scavenger such as 1,4-butanedithiol or 1,2-ethanedithiol is effective.
- a cation scavenger such as 1,4-butanedithiol or 1,2-ethanedithiol is effective.
- the 2,4-di-trophenyl group used as the imidazole protecting group of histidine is removed by thiophenol treatment, and the formyl group used as the indole protecting group of tryptophan is substituted with the above 1,2-ethanedithiol, 1,4—
- the formyl group used as the indole protecting group of tryptophan is substituted with the above 1,2-ethanedithiol, 1,4—
- alkali treatment with dilute sodium hydroxide, dilute ammonia, etc. Protection and protection of functional groups that should not be involved in the reaction of the raw materials, elimination of the protected groups, activation of the functional groups involved in the reaction, and the like can be appropriately selected from known groups or known means.
- the peptide chain is extended to a desired chain length on the amino group side.
- the peptide was prepared by removing only the protecting group of the a-amino group at the N-terminus of the peptide chain and the peptide (or amino acid) by removing only the protecting group of the carboxyl group at the C-terminus.
- the condensation is carried out in a mixed solvent as described above. Details of the condensation reaction are the same as described above.
- all the protecting groups are removed by the above method to obtain a desired crude peptide.
- This crude peptide is purified by various known purification means, and the main fraction is freeze-dried to obtain an amide of the desired peptide.
- the a-carboxyl group of the carboxy terminal amino acid is condensed with a desired alcohol to form an amino acid ester, and then the desired peptide ester is obtained in the same manner as the peptide amide.
- the desired peptide ester is obtained in the same manner as the peptide amide.
- the insolubilized one can be directly immunized. Further, a complex obtained by binding or adsorbing the amyloid antigen to a suitable carrier may be immunized.
- the mixing ratio of the carrier (carrier) and the amyloid antigen (hapten) is determined by the following: if the antibody can be efficiently produced against the 3-amyloid antigen bound or adsorbed to the carrier, The hapten may be bound or adsorbed at any ratio.
- a natural or synthetic polymer carrier commonly used for preparing antibodies against hapten antigens is used in a weight ratio of 0.1 to 100 per hapten. Can be used.
- Natural polymer carriers include, for example, serum albumin of mammals such as horseshoe, egrets and humans, and thyroglobulins of mammals such as horseshoe and egrets, for example, horseshoe, egrets, humans and higgies. Mammalian hemoglobin, keyhole limpet hemocyanin and the like are used.
- synthetic polymer carrier for example, polymers such as polyamino acids, polystyrenes, polyacryls, polybutyls, and polypropylenes, and various latetus such as copolymers can be used.
- various condensing agents can be used for force coupling between the hapten and the carrier.
- diazonium compounds such as bisdiazobenzidine which crosslink tyrosine, histidine, and tryptophan, and dartal compounds which crosslink amino groups
- diisocyanate compounds such as toluene 1,2,4-diisocyanate
- dimaleimide compounds such as N, N, 1-o-phenylene dimaleimide crossing the thiol group, amino and thiol groups
- a maleimide active ester compound which cross-links a carbodiimide compound which cross-links an amino group and a carboxyl group is conveniently used.
- an active ester reagent having a dithiopyridyl group on one of the amino groups eg, N-succinimidyl 3- (2-pyridyldithio) propionate (SPDP), etc.
- SPDP N-succinimidyl 3- (2-pyridyldithio) propionate
- a thiol group is introduced, and a maleimide group is introduced into the other amino group with a maleimide active ester reagent, and then the two can be reacted.
- -Amyloid antigen is administered to warm-blooded animals alone at the site where antibody production is possible, for example, by intraperitoneal injection, intravenous injection, subcutaneous injection, etc., together with carrier and diluent Is done.
- Complete Freund's adjuvant / incomplete Freund's adjuvant may be administered in order to enhance the antibody-producing ability upon administration. The dose is usually given once every 2 to 6 weeks, 2 to 10 times in total.
- warm-blooded animals include sanole, perch, rabbit, dog, monoremot, mouse, rat, hidge, goat, and chicken.
- Mouse and rat are preferably used for preparing monoclonal antibodies.
- a warm-blooded animal immunized with an amyloid antigen for example, a mouse with an antibody titer selected from mice, and spleen or lymph nodes collected 2 to 5 days after final immunization and contained in them
- an anti-] 3_amyloid monoclonal antibody-producing hybridoma By fusing the antibody-producing cells thus obtained with myeloma cells, an anti-] 3_amyloid monoclonal antibody-producing hybridoma can be prepared.
- the anti-amyloid antibody titer in the serum is measured, for example, by reacting the labeled j8-amyloid described below with the antiserum, and then measuring the activity of a labeling agent bound to the antibody.
- the fusion operation can be carried out according to a known method, for example, the method of Kohler and Milstein [Nature, 256, 495 (1975)].
- the fusion promoter include polyethylene glycol (PEG) and Sendai virus, and PEG is preferably used.
- PEG polyethylene glycol
- myeloma cells include NS-1, P3U1, SP2Z0, AP-1, and the like, with P3U1 being preferred.
- the preferred ratio between the number of antibody-producing cells (spleen cells) and the number of bone marrow cells used is usually about 1: 1 to 20: 1, and PEG (preferably PEG1000 to PEG6000) is used at a concentration of about 10 to 80%.
- the cell fusion can be carried out efficiently by adding the mixture and incubating at usually 20 to 40 ° C, preferably 30 to 37 ° C, usually for 1 to 10 minutes.
- Various methods can be used to screen for anti-; 8-amyloid antibody-producing hybridomas. For example,
- a hybridoma culture supernatant is added to a solid phase (eg, a microplate) on which the antibody is adsorbed directly or together with a carrier, and then an anti-immunoglobulin antibody (cells used for cell fusion) labeled with radioactive substances, enzymes, etc.
- anti-mouse immunoglobulin antibody is used
- Protein A is added to detect anti-j3-amidomonoclonal monoclonal antibody bound to solid phase, anti-immunoglobulin antibody or protein A is adsorbed
- a method of detecting the anti-amyloid monoclonal antibody bound to the solid phase by adding a hybridoma culture supernatant to the solid phase and adding 3-amyloid labeled with a radioactive substance, an enzyme or the like.
- HAT hypoxanthine, aminopterin, thymidine
- a medium for animal cells containing 10 to 20% fetal bovine serum eg, RPM I 1 6 4 0.
- the antibody titer of the hybridoma culture supernatant can be measured in the same manner as in the measurement of the anti-
- Separation and purification of anti-amyloid monoclonal antibodies can be performed by the same method as that used for ordinary polyclonal antibodies (eg, salting out, alcohol precipitation, isoelectric precipitation, electrophoresis, iontophoresis).
- Absorption / desorption method using an exchanger eg DEAE
- ultracentrifugation method eg. DEAE
- gel filtration method e.g., antigen-bound solid phase or antibody only by active adsorbent such as protein A, protein G or KAPTIV—AE (TECNOGEN SCRA.)
- active adsorbent such as protein A, protein G or KAPTIV—AE (TECNOGEN SCRA.)
- TECNOGEN SCRA TECNOGEN SCRA.
- the produced hybridomas can be selected, for example, by measuring the binding between a peptide corresponding to a partial region thereof and an antibody produced by the hybridoma.
- the antibody of the present invention can be produced by culturing the hybridoma cells in vivo or in vitro of a warm-blooded animal and collecting the antibody from the body fluid or culture.
- Anti-3_amyloid monoclonal antibodies obtained in this way include Alzheimer's disease, mild cognitive impairment (MCI), brain amyloid angiopathy (CAA), etc. (Preferably, Alzheimer's disease etc.) can be used as a prophylactic / therapeutic agent (including a progress inhibitor).
- the prophylactic / therapeutic agent include an inhibitor of j3-amyloid aggregation or deposition in the brain, and a specific increase in the blood concentration of a peptide having the amino acid sequence represented by SEQ ID NO: 5. It is preferably an agent.
- the antibody molecule itself may be used, or F (ab ') 2 , Fab' or Fab fraction of the antibody molecule may be used.
- an antibody that penetrates the blood-brain barrier (BBB) is preferable.
- an antibody that suppresses the deposition of] 3-amyloid, an oligomer of] 3-amyloid An antibody that inhibits formation or an antibody that can extract _ amyloid from the formed senile plaque (or an antibody that can eliminate senile plaque formed in the brain) and the like are preferable.
- an antibody that does not penetrate the blood-brain barrier (BBB) may be used. In this case, an antibody that captures _amyloid in the periphery and promotes amyloid excretion from the brain to the periphery It is preferable that
- antibodies that can penetrate the blood-brain barrier ( ⁇ ⁇ ⁇ ) and form senile plaques and bind to amyloid, as described above, are directly transmitted to the body, such as Alzheimer's disease and mild cognitive impairment (MCI). It can also be used as a diagnostic agent.
- MCI blood-brain barrier
- the diffuse senile plaques found in very early Alzheimer's disease and mild cognitive impairment (MCI) are known to be mainly composed of] -amyloid ( ⁇ -42).
- the preventive and therapeutic agents for Alzheimer's disease, mild cognitive impairment (MCI), cerebral amyloid angiopathy (CAA), etc. (preferably, Alzheimer's disease, etc.) containing the antibody of the present invention have low toxicity and can be used as liquids as they are.
- Oral or parenteral administration to humans or mammals (eg, rats, puppies, higgins, pigs, puppies, cats, dogs, monkeys, etc.) as a pharmaceutical composition in an appropriate dosage form can do .
- the dose varies depending on the administration subject, target disease, symptoms, administration route and the like.
- the dose when used for the treatment of Alzheimer's disease in adults, Usually, about 0.01-20 mg / kg body weight, preferably about 0.1-10 mg / kg body weight, more preferably 0 ⁇ :! It is convenient to parenterally administer about 5 mg / kg body weight about 1 to 5 times a week, preferably about 1 to 4 times a month. In the case of oral administration, an equivalent amount can be administered. If the symptoms are particularly severe, the dose may be increased accordingly.
- the antibody of the present invention can be administered by itself or as a suitable pharmaceutical composition.
- the pharmaceutical composition used for the administration contains the antibody or a salt thereof and a pharmacologically acceptable carrier, diluent or excipient.
- Such compositions are provided in dosage forms suitable for oral or parenteral administration.
- compositions for oral administration include solid or liquid dosage forms, specifically tablets (including sugar-coated tablets and film-coated tablets), pills, granules, powders, capsules (including soft capsules). ), Syrups, emulsions, suspensions and the like.
- Such a composition is produced by a method known per se and contains a carrier, diluent or excipient commonly used in the field of pharmaceuticals.
- a carrier for example, lactose, starch, sucrose, magnesium stearate and the like are used as carriers and excipients for tablets.
- compositions for parenteral administration for example, injections, suppositories, etc. are used, and injections are intravenous injections, subcutaneous injections, intradermal injections, intramuscular injections, intravenous injections, etc. Shape.
- a powerful injection is prepared according to a method known per se, for example, by dissolving, suspending or emulsifying the antibody or a salt thereof in a sterile aqueous or oily liquid commonly used for injections.
- aqueous liquid for injection for example, physiological saline, isotonic solution containing glucose and other auxiliary agents and the like are used, and suitable solubilizing agents, for example, alcohol (e.g., ethanol), polyalcohol (e.g., Propylene dalycol, polyethylene glycol), a nonionic surfactant [eg, polysorbate 80, HCO-50 (olyoxyethylene (50 mol) adduct of hydrogenated castor oil)] and the like.
- alcohol e.g., ethanol
- polyalcohol e.g., Propylene dalycol, polyethylene glycol
- a nonionic surfactant eg, polysorbate 80, HCO-50 (olyoxyethylene (50 mol) adduct of hydrogenated castor oil)
- oily liquid for example, sesame oil, soybean oil, and the like are used, and benzyl benzoate, benzyl alcohol, and the like may be used as a solubilizing agent.
- the above-mentioned oral or parenteral pharmaceutical compositions are conveniently prepared in dosage unit forms to be compatible with the dosage of the active ingredient.
- Examples of powerful dosage unit dosage forms include tablets, pills, capsules, injections (ampoules), suppositories, etc., and usually about 5 to 500 mg, especially injections, for each dosage unit dosage form. It is preferable that about 5 to: 100 mg, and about 10 to 250 mg of the above-mentioned antibody be contained in other dosage forms.
- Each of the above-mentioned compositions is preferably used unless an unfavorable interaction is caused by combination with the above-mentioned antibody. It may contain other active ingredients.
- T F A trifluoroacetic acid
- G 1 y glycine A 1 a: Alanine
- Th r Threonine
- d-FB S dialyzed fetal serum
- SEQ ID NOs used in the present specification represent the amino acid sequences of the following peptides.
- the mouse monoclonal nanoreactive antibody BNT-77a (Asami daka A. et al., Biochemistry, 34, 10272-10278, 1995) was prepared according to the method described in Example 7 of WO 94/17197. —Obtained by immunizing BALB / C mice with amyloid (11-28). A 0.1 M carbonate buffer and ⁇ g9.6 solution containing 15 g / ml of this solution were dispensed 100 1 each into a 96-well microplate and left at 4 ° C for 24 hours. The excess binding site of the gel was inactivated by adding 300 ⁇ l of Block Ace (Dainippon Pharmaceutical) diluted 4-fold with PBS and left at 4 ° C for 24 hours.
- Block Ace Block Ace
- Measurement of Ai3x-40 includes a plate immobilized with primary antibody as described above, buffer EC [10% Block Ace, 0.2% BSA, 0.4M NaCl, 0.05% CHAPS, 2mM EDTA, the 0.05% NaN 3 0.02M phosphate buffer Solution, pH7], a dilution series of Aj3 1-40 (Peptide Research Laboratories) and a test sample ( ⁇ ) were added, and reacted at 4 ° C for 24 hours. After washing with PBS, BA-27a-HRP (WO 94 / BA) was diluted 1000-fold with buffer C (0.02 M phosphate buffer containing 1% BSA, 0.4 M NaCl, and 2 mM EDTA, pH 7) as a secondary antibody.
- buffer C 0.02 M phosphate buffer containing 1% BSA, 0.4 M NaCl, and 2 mM EDTA, pH 7
- ⁇ -42 was measured by adding a dilution series of ⁇ 1-42 (Peptide Research Institute) and a test sample to the BNT-77a-immobilized plate prepared above, and adding BC-05a-HRP ( WO 94/17197), and was measured in the same manner as
- Plasma ⁇ ⁇ -40 was 137.3 ⁇ 2.2 fmol / ml in the BA-27a administration group, 3.3 ⁇ 1.2 fmol / ml in the BC_05a administration group, and 1.8 fmol / ml in 3.4 soil in the normal control group.
- Cerebrospinal fluid ⁇ -40 was 670.8 ⁇ 252.6 fmol / ml in the BA-27a administration group, 166.5 ⁇ 140.1 fmol / ml in the BC_05a administration group, and 246 ⁇ 184.3 fmol / ml in the normal control group.
- Plasma-IV-42 was 0.5 ⁇ 0.4 fmol / ml in the BA-27a administration group, 60.7 ⁇ 7.1 fmol / ml in the BC_05a administration group, and 0.2 ⁇ 0.2 fmol / ml in the normal control group.
- Cerebrospinal fluid IV-42 was below the measurement sensitivity in the BA-27a administration group, 0.6 ⁇ 0.4 fmol / ml in the BC-05a administration group, and below the measurement sensitivity in the normal control group.
- Ax-40 was significantly increased by administration of BA-27a to 40-fold in plasma and 2.7-fold in cerebrospinal fluid (p ⁇ 0.001). No increase in plasma or cerebrospinal fluid was observed with BC-05a administration.
- AjS x-42 did not increase Aj3 x-42 in both plasma and cerebrospinal fluid after BA-27a administration.
- plasma significantly increased by a factor of 304 (p ⁇ 0.001), and cerebrospinal fluid, which was less than the measurement sensitivity in the normal control, increased to 0.6 soil 0.4 fmol / ml.
- mice to which BC-05a was continuously administered for one month only plasma A i3 x-42 increased to 324.1 fmol / ml, a 1621-fold increase, and was separated into antibody-bound and non-antibody-bound by immunoprecipitation. As a result, almost 100% of the increased Ax-42 was unbound.
- the administered BC-05a specifically increased the clearance of ⁇ -42 in the brain, resulting in an increase in cerebrospinal fluid A ⁇ x-42 and plasma ⁇ x-42.
- the cerebral extract was prepared by dividing into a soluble fraction and an insoluble fraction.
- the soluble fraction was prepared in the same manner as in Example 2.
- the precipitate after ultracentrifugation was washed with TS buffer, and a 50 mM tris-hydrochloric acid solution (pH 7.5) containing 6 M guanidine hydrochloride (8 times the cerebral hemisphere weight) was added. In addition, it was dissolved.
- the mixture was centrifuged at 15000 i'pm at 4 ° C for 20 minutes, and the supernatant was used as an insoluble fraction.
- the A3 concentration was measured according to the method described in Example 1.
- the cerebral insoluble fraction was used as a sample after diluting 2000-fold with buffer EC.
- the A j8 concentration in the plasma was determined in two ways: a method for quantifying the diluted plasma as it is, and a method for dissociating the BC-05a complex with guanidine hydrochloride and then quantifying the dilution.
- the latter was prepared by adding 30 ⁇ l of 50 mM Tris-HCl aqueous solution (pH 7.5) containing 8 ⁇ g guanidine hydrochloride to 1 ⁇ m of plasma, mixing, adding 560 ⁇ l of EC-1 buffer, and diluting the mixture with an ELISA sample. did.
- BC-05a group 1200 1200 347 442 Sat 57.4 mean S.E.M. Similar to single administration, plasma A] 3 concentration increased significantly from 22 to 32 times by BC_05a administration. Treatment of plasma with guanidine resulted in: 6 ⁇ -05 & plasma in the treated group] 3x-42 concentration increased about twice more, so BC-05a stabilized ⁇ ⁇ -42 in blood It is possible that they have contributed.
- amyloid ( ⁇ - 4 2) has a low ratio in the soluble fraction, such as cerebrospinal fluid, and its transport out of the brain across the blood-brain barrier is expected to be less efficient,
- the above antibody may selectively increase the blood concentration of only 3-amyloid ( ⁇ _42) and decrease insoluble amyloid (X-42) in the brain.
- the above-mentioned antibody is almost free of cerebrovascular amyloid containing ⁇ -amyloid ( ⁇ _40) as a main component. Since it does not respond, it is not considered to cause bleeding from cerebral blood vessels including cerebral amyloid angiopathy.
- ⁇ _40 cerebrovascular amyloid containing ⁇ -amyloid
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Abstract
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Priority Applications (3)
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EP04773070A EP1666061A1 (en) | 2003-09-09 | 2004-09-08 | Use of antibody |
CA002538220A CA2538220A1 (en) | 2003-09-09 | 2004-09-08 | Use of antibody |
US10/571,018 US20070031416A1 (en) | 2003-09-09 | 2004-09-08 | Use of antibody |
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JP2003-317443 | 2003-09-09 | ||
JP2003317443 | 2003-09-09 |
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