WO2002002767A1 - Proteine de recepteur couple a la proteine g et adn correspondant - Google Patents
Proteine de recepteur couple a la proteine g et adn correspondant Download PDFInfo
- Publication number
- WO2002002767A1 WO2002002767A1 PCT/JP2001/005711 JP0105711W WO0202767A1 WO 2002002767 A1 WO2002002767 A1 WO 2002002767A1 JP 0105711 W JP0105711 W JP 0105711W WO 0202767 A1 WO0202767 A1 WO 0202767A1
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- Prior art keywords
- protein
- receptor protein
- salt
- coupled receptor
- present
- Prior art date
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- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 description 1
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- 229940104230 thymidine Drugs 0.000 description 1
- 229940113082 thymine Drugs 0.000 description 1
- 210000001541 thymus gland Anatomy 0.000 description 1
- 229960002175 thyroglobulin Drugs 0.000 description 1
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- ITMCEJHCFYSIIV-UHFFFAOYSA-N triflic acid Chemical compound OS(=O)(=O)C(F)(F)F ITMCEJHCFYSIIV-UHFFFAOYSA-N 0.000 description 1
- 125000004044 trifluoroacetyl group Chemical group FC(C(=O)*)(F)F 0.000 description 1
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- 125000002221 trityl group Chemical group [H]C1=C([H])C([H])=C([H])C([H])=C1C([*])(C1=C(C(=C(C(=C1[H])[H])[H])[H])[H])C1=C([H])C([H])=C([H])C([H])=C1[H] 0.000 description 1
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07K—PEPTIDES
- C07K14/00—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof
- C07K14/435—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof from animals; from humans
- C07K14/705—Receptors; Cell surface antigens; Cell surface determinants
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P29/00—Non-central analgesic, antipyretic or antiinflammatory agents, e.g. antirheumatic agents; Non-steroidal antiinflammatory drugs [NSAID]
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P3/00—Drugs for disorders of the metabolism
- A61P3/04—Anorexiants; Antiobesity agents
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P43/00—Drugs for specific purposes, not provided for in groups A61P1/00-A61P41/00
Definitions
- the present invention relates to a novel G protein-coupled receptor protein derived from human adipocytes or a salt thereof, and DNA encoding the same.
- G protein conjugated guanine nucleotide-binding protein
- TMR seven-transmembrane receptor protein
- G protein-coupled receptor proteins are present on the surface of various functional cells of living cells and organs, and are physiologically targeted as molecules that regulate the functions of those cells and organs, such as hormones, neurotransmitters and bioactive substances. Plays an important role. Receptors transmit signals into cells via binding to physiologically active substances, and these signals trigger various reactions such as suppression of cell activation and activation.
- physiological functions are regulated under the control of many hormones, hormone-like substances, neurotransmitters or bioactive substances.
- physiologically active substances are present in various parts of the body, and regulate their physiological functions through the corresponding receptor proteins.
- hormones, neurotransmitters and other physiologically active substances have not been reported on the structure of their receptor protein.
- the G protein-coupled receptor is useful for searching for a new bioactive substance (that is, a ligand) using its signal transduction as an index, and for searching for an agonist or antagonist for the receptor.
- a new bioactive substance that is, a ligand
- an agonist or an agonist at the receptor can be analyzed. It is also possible to produce.
- ligands, agonists, or antagonists for the receptor are expected to be used as preventive / therapeutic or diagnostic agents for diseases associated with dysfunction of the G protein-coupled receptor.
- a decrease or increase in the function of the receptor in a living body based on a gene mutation of a G protein-coupled receptor often causes some disease.
- the receptor In addition to the administration of angonist and agonist in the evening, gene therapy by introducing the receptor gene into a living body (or a specific organ) or by introducing an antisense nucleic acid against the receptor gene. It can also be applied.
- the nucleotide sequence of the receptor is essential information for examining the presence or absence of a deletion or mutation in the gene, and the receptor gene is involved in the dysfunction of the receptor. It can also be applied to therapeutic and diagnostic agents for the prevention of illness.
- the present invention provides a novel G protein-coupled receptor protein useful as described above. That is, a novel G protein-coupled receptor protein or a partial peptide thereof or a salt thereof, a polynucleotide encoding the G protein-coupled receptor protein or a partial peptide thereof (DNA, RNA and derivatives thereof) (DNA, RNA and derivatives thereof), a recombinant vector containing the polynucleotide, a transformant carrying the recombinant vector, the G protein-coupled receptor protein or a salt thereof An antibody against the G protein-coupled receptor protein or a partial peptide thereof or a salt thereof, a compound that changes the expression level of the G protein-coupled receptor protein, a method for determining a ligand for the G protein-coupled receptor, A compound that alters the binding between a ligand and the G protein-coupled receptor protein (Anne evening agonist, Agonisu me) or the screening method of the salt, a kit for the screening, the screening
- the present inventors have succeeded in isolating a cDNA encoding a novel G protein-combined receptor Yuichi protein derived from human adipocytes and analyzing the entire nucleotide sequence thereof. Then, when this nucleotide sequence was translated into an amino acid sequence, the first to seventh transmembrane regions were confirmed on the hydrophobicity plot, and the protein encoded by these cDNAs was transmembrane G-protein conjugated seven times. It was confirmed that it was a receptor protein. The present inventors have further studied based on these findings, and as a result, have completed the present invention.
- a G protein-coupled receptor protein or a salt thereof which comprises an amino acid sequence identical or substantially identical to the amino acid sequence represented by SEQ ID NO: 1;
- the antibody according to (10) which is a neutralizing antibody that inactivates the signal transduction of the G protein-coupled receptor protein according to (1);
- a ligand comprising the G protein-coupled receptor protein described in (1) above or the partial peptide described in (3) or a salt thereof, and a G protein-coupled receptor protein described in (1) above.
- a ligand obtainable by using the screening method according to (16) or the screening kit according to (17) and a G protein according to (1).
- a medicament comprising a compound or a salt thereof that changes the binding property to a conjugated receptor protein or a salt thereof,
- (21) a polynucleotide comprising a nucleotide sequence complementary to the polynucleotide according to (4) or a part thereof,
- (22) the method for quantifying the mRNA of the G protein-coupled receptor Yuichi protein according to (1), which comprises using the polynucleotide or a part thereof according to (4);
- a medicament comprising a compound or a salt thereof that alters the expression level of the G protein-coupled receptor protein according to (1), which can be obtained by using the screening method according to (25).
- a pharmaceutical comprising the compound or a salt thereof, which alters the amount of the G protein-coupled receptor protein according to (1) in the cell membrane obtainable by using the screening method according to (26);
- the protein is: (1) an amino acid sequence represented by SEQ ID NO: 1; one or more amino acids in the amino acid sequence represented by SEQ ID NO: 1 (preferably about 1 to 30, more preferably 1 to 30); About 9 amino acids, more preferably several (1 to 5) amino acids are deleted, and 2 or more amino acids (preferably 1 to 30) in the amino acid sequence represented by SEQ ID NO: 1 Amino acid sequence to which about 1, more preferably about 1 to 10, and even more preferably several (1 to 5) amino acids have been added; 3 1 or 2 in the amino acid sequence represented by SEQ ID NO: 1 An amino acid sequence in which at least (preferably about 1 to 30, more preferably about 1 to 10, and more preferably several (1 to 5)) amino acids have been substituted with another amino acid; or A protein containing an amino acid sequence combining them 1) G protein coupled receptions evening one protein or salt thereof according,
- the ligand is, for example, angiotensin, bombesin, canapinoid, cholecystokinin, glutamine, serotonin, melatonin, neuropeptide Y, opioid, purine, vasopressin, oxitosine, PACAP (eg, ACAP 27, PACAP 38), secretin, glucagon, calcitonin, adrenomejuulin, somatos, GHRH, CRF, ACTH, GRP, PTH, VIP (basoactive intestinal polypeptide), somatos, dopamine, motilin , Amylin, bradykinin, CGRP (calcito-ningene relayed peptide), leukotriene, pancreastatin, prostaglandin, tropoxane, adenosine, adrenaline, chemokine superfamily (eg, IL-8, GRO a, GR ⁇ j3, GROr, NAP— 2, CXC chemokine
- Type receptor a method for screening a compound or a salt thereof that changes the binding property to a protein or a salt thereof, (44) (i) when the labeled ligand is brought into contact with the membrane fraction of the G protein-coupled receptor-protein-containing cells described in (1) above; (1) measuring the amount of labeled ligand bound to the membrane fraction of the cell when the membrane is contacted with the membrane fraction of the cell containing the G protein-coupled receptor protein described in (1), and comparing the measured amount; A method for screening a compound or a salt thereof, which alters the binding property between a ligand characterized by the above and the G protein-coupled receptor protein or a salt thereof according to the above (1);
- a compound that activates the G protein-coupled receptor protein or the salt thereof described in (1) above is contacted with a cell containing the G protein-coupled receptor protein or protein described in (1) above. And (ii) a cell that contains the G protein-coupled receptor protein or the compound that activates the G protein-coupled receptor protein or a salt thereof described in (1) above. And measuring and comparing the cell stimulating activity mediated by the G protein-coupled receptor protein when contacted with the G protein-coupled receptor protein or the G protein-coupled receptor protein described in (1) above.
- a method for screening a compound that changes the binding property to a salt thereof or a salt thereof (47) a method for activating the G protein-coupled receptor protein described in (1) above or a compound activating the salt thereof described in (8) above.
- Body The G protein-coupled receptor protein expressed on the cell membrane of the transformant by contact with the transformant, and the compound and test for activating the G protein-coupled receptor protein or the salt thereof described in (1) above.
- the compound that activates the G protein-coupled receptor protein described in (1) above is angiotensin, bombesin, canapinoid, cholecystokinin, dalyumin, serotonin, melatonin, neuropeptide Y , Opioids, purines, vasopleucine, oxitosine, PACAP (e.g., PACAP 27, PACAP 38), secretin, glucagon, calcitonin, adrenomedullin, somato sutin, GHRH, CRF, ACTH, GRP, PTH, VIP (pasoactive) Intestinal polypeptide), somatostin, dopamine, motilin, amylin, bradykinin, CGRP (calcitonin gene-related peptide), leukotriene, pancreastatin, prostaglandin, trompoxan, adenosine, adrenaline, chemokine super Family (eg, ILX-8, GRO
- FIG. 1 is a hydrophobicity plot of TGR13.
- FIG. 2 is a diagram showing the amino acid sequence of TGR13 in one-letter code.
- FIG. 3 is a view showing the tissue specificity of TGR13 mRNA expression.
- the G protein-coupled receptor protein of the present invention may be the same as or substantially the same as the amino acid sequence represented by SEQ ID NO: 1 (FIG. 2). It is a receptor protein containing the same amino acid sequence.
- the receptor protein of the present invention includes, for example, any cell (eg, spleen cell, nerve cell, glial cell, etc.) of mammals (eg, human, guinea pig, rat, mouse, mouse, egret, bush, sheep, horse, monkey, etc.).
- mammals eg, human, guinea pig, rat, mouse, mouse, egret, bush, sheep, horse, monkey, etc.
- the brain various parts of the brain (e.g., olfactory bulb, nucleus planis, basal sphere, hippocampus, thalamus, hypothalamus, hypothalamus nucleus, cerebral cortex, medulla, cerebellum, occipital lobe, frontal
- the amino acid sequence substantially the same as the amino acid sequence represented by SEQ ID NO: 1 is, for example, about 60% or more, preferably about 70% or more, the amino acid sequence represented by SEQ ID NO: 1.
- the amino acid sequence represented by SEQ ID NO: 1 of the present invention examples include, for example, an amino acid sequence having an amino acid sequence substantially the same as the amino acid sequence represented by SEQ ID NO: 1, and an amino acid sequence represented by SEQ ID NO: 1 Proteins having substantially the same activity as the above are preferred.
- substantially the same activity examples include a ligand binding activity and a signal transduction activity.
- substantially the same means that their activities are the same in nature. Therefore, the activities such as ligand binding activity and signal transduction activity are equivalent (eg, about 0.01 to 100 times, preferably about 0.5 to 20 times, more preferably about 0.5 to 20 times).
- the quantitative factors such as the degree of these activities and the molecular weight of the protein may be different.
- the activity such as the ligand binding activity and the signal information transmission activity can be measured according to a known method.
- the activity can be measured according to a ligand determination method ⁇ ⁇ ⁇ ⁇ screening method described later.
- the receptor protein of the present invention includes: (1) one or more (preferably about 1 to 30 and more preferably 1 to 10) amino acids in the amino acid sequence represented by SEQ ID NO: 1; Amino acid sequence in which several (1 to 5) amino acids have been deleted, and 2 or more (preferably 1 to 5) amino acid sequences represented by SEQ ID NO: 1.
- Two or more (preferably about 1 to 30, more preferably about 1 to 10, and more preferably several (1 to 5)) amino acids are substituted with another amino acid Proteins containing amino acid sequences or amino acid sequences combining them are also used .
- the receptor protein in the present specification has an N-terminus (amino terminus) at the left end and a C-terminus (caprolactyl terminus) at the right end.
- the receptor proteins of the present invention including the receptor protein containing the amino acid sequence represented by SEQ ID NO: 1, have a C-terminal lipoxyl group (1-COOH), lipoxylate (1-COO-), amide ( _ CONH 2 ) or ester (-COOR).
- R in the ester e.g., methyl, Echiru, n- propyl, alkyl groups such as isopropyl, n- butyl, Shikurobe pentyl, C 3 _ 8 cycloalkyl group such as cyclohexyl, for example, phenyl , a - c 2 Ariru groups, naphthyl, for example, benzyl, Q, such as full Eniru alkyl or flying one naphthylmethyl such phenethyl - Nafuchiru C
- the receptor protein of the present invention When the receptor protein of the present invention has a carbonyl group (or carboxylate) other than the C-terminus, the receptor protein of the present invention includes a carboxyl group amidated or esterified.
- the ester in this case, for example, the above-mentioned C-terminal ester and the like are used.
- the receptions evening one protein of the present invention is the protein mentioned above, Amino groups Mechionin residue N-terminal protecting group (e.g., formyl group, C 2 such Asechiru - such as 6 acyl group such as 6 Arukanoiru group ), Those whose N-terminal side is cleaved in vivo, and whose daryumil group is pyroglutamine-oxidized, those on the side chains of amino acids in the molecule (eg, 1 OH, —SH, amino group, imidazole group, indole group, Guanijino group, etc.) a suitable protecting group (e.g., formyl group, C 2 such Asechiru - those protected by 6 etc. Ashiru groups such Arukanoiru group), a sugar chain Complex proteins such as bound so-called glycoproteins are also included.
- Mechionin residue N-terminal protecting group e.g., formyl group, C 2 such Asechiru - such as
- receptor protein of the present invention for example, a receptor protein containing the amino acid sequence represented by SEQ ID NO: 1 is used.
- Partial peptide of the receptor protein of the present invention Any one may be used as long as it is a partial peptide of the receptor protein of the present invention described above.
- the receptor protein protein of the present invention it may be exposed outside the cell membrane. Sites that have receptor binding activity are used.
- the partial peptide of the receptor protein having the amino acid sequence represented by SEQ ID NO: 1 was analyzed to be an extracellular region (hydrophilic (Hy drop ilic) site) in hydrophobicity plot analysis. It is a peptide containing the portion shown. Further, a peptide partially containing a hydrophobic (Hydrophobic) site can also be used. A peptide containing individual domains may be used, but a partial peptide containing multiple domains at the same time may be used.
- the number of amino acids of the partial peptide of the present invention is at least 20 or more, preferably 50 or more, more preferably 100 or more of the amino acid sequences of the aforementioned constituent amino acid sequences of the receptor protein of the present invention. Are preferred.
- a substantially identical amino acid sequence refers to an amino acid sequence of about 50% or more, preferably about 60% or more, more preferably about 70% or more, further preferably about 80% or more, and particularly preferably Represents an amino acid sequence having about 90% or more, most preferably about 95% or more homology.
- the partial peptide of the present invention has one or more (preferably about 1 to 10, more preferably several (1 to 5)) amino acids in the above amino acid sequence deleted. Or one or more (preferably about 1 to 20, more preferably about 1 to 10, and more preferably several (1 to 5)) amino acids are added to the amino acid sequence. Or 1 or 2 or more (preferably about 1 to 10, more preferably several, more preferably about 1 to 5) amino acids in the amino acid sequence are replaced with other amino acids. May be.
- the C-terminus is usually a hydroxyl group (one COOH) or a carboxylate (one CO ⁇ _), but as in the protein of the present invention described above, the C-terminus is an amide ( ⁇ CO NH 2 ) or ester ( ⁇ COOR) Good.
- the partial peptide of the present invention has a N-terminal methionine residue whose amino group is protected with a protecting group, and a N-terminal side is cleaved in vivo as in the case of the above-described receptor protein of the present invention.
- G1n is pyroglutamine-oxidized, and the substituent on the side chain of the amino acid in the molecule is protected with an appropriate protecting group, or a complex peptide such as a so-called glycopeptide to which a sugar chain is bound, etc. Is also included.
- the C-terminus is usually a hydroxyl group (one COOH) or a carboxylate (one COO—), but as in the protein of the present invention, the C-terminal is an amide (_COO). It may be NH 2 ) or an ester (—COOR).
- Examples of the salt of the receptor protein or its partial peptide of the present invention include a physiologically acceptable salt with an acid or a base, and particularly preferably a physiologically acceptable acid addition salt.
- Such salts include, for example, salts with inorganic acids (eg, hydrochloric acid, phosphoric acid, hydrobromic acid, sulfuric acid) or organic acids (eg, acetic acid, formic acid, propionic acid, fumaric acid, maleic acid, Salts with succinic acid, tartaric acid, citric acid, malic acid, oxalic acid, benzoic acid, methanesulfonic acid, benzenesulfonic acid) are used.
- inorganic acids eg, hydrochloric acid, phosphoric acid, hydrobromic acid, sulfuric acid
- organic acids eg, acetic acid, formic acid, propionic acid, fumaric acid, maleic acid
- the receptor protein of the present invention or a salt thereof can be produced from the above-mentioned mammalian cell or tissue by a known method for purifying the receptor protein, or the receptor protein of the present invention described later. Can also be produced by culturing a transformant containing DNA encoding Also, the protein can be produced by the protein synthesis method described later or according to the method.
- a commercially available resin for protein synthesis can be used.
- resins include, for example, chloromethyl resin, hydroxymethyl resin, benzhydrylamine resin, aminomethyl resin, —Resin resin, 4-methylbenzhydrylamine resin, PAM resin, 4-hydroxymethylmethylphenylacetamidomethyl resin, polyacrylamide resin, 4- (2 ′, 4′dimethoxyphenylhydroxymethyl) phenoxy resin, 4- (2 ', 4'-dimethoxyphenyl-Fmoc aminoethyl) phenoxy resin.
- amino acids having a suitably protected amino group and side chain functional group are condensed on the resin in accordance with the sequence of the target protein according to various known condensation methods.
- the protein is cleaved from the resin, and at the same time, various protecting groups are removed.
- an intramolecular disulfide bond formation reaction is carried out in a highly diluted solution to obtain a target protein or an amide thereof.
- various activating reagents that can be used for protein synthesis can be used, and carbodiimides are particularly preferable.
- carbopimides DCC, N, N, diisopropyl carbopimide, N-ethyl-N,-(3-dimethylaminoprolyl) carbopimide are used.
- protected amino acids may be added directly to the resin along with racemization inhibitors (eg, H ⁇ ⁇ ⁇ Bt, HOOBt), or symmetric anhydrides or HOBtesters or HOOBt.
- the t-ester can be added to the resin after the protected amino acid has been activated in advance.
- the solvent used for activating the protected amino acid or for condensing with the resin can be appropriately selected from solvents known to be usable for the protein condensation reaction.
- acid amides such as N, N-dimethylformamide, N, N-dimethylacetamide, N-methylpyrrolidone, halogenated hydrocarbons such as methylene chloride and chloroform, alcohols such as trifluoroethanol , Sulfoxides such as dimethyl sulfoxide, ethers such as pyridine, dioxane, and tetrahydrofuran; nitriles such as acetonitrile and propionitrile; esters such as methyl acetate and ethyl acetate; or an appropriate mixture thereof. .
- the reaction temperature is appropriately selected from a range known to be usable for a protein bond formation reaction, and is usually appropriately selected from a range of about 120 ° C to 50 ° C.
- the activated amino acid derivative is usually used in a 1.5 to 4-fold excess.
- Examples of the protecting group for the amino group of the starting material include Z, Boc, succinyl-pentyloxycarbonyl, isopolnyloxycarbonyl, 4-methoxybenzyloxycarbonyl, C11Z, Br—Z , Adamantyloxycarponyl, trifluoroacetyl, phthaloyl, formyl, 2-ditrophenylsulfenyl, diphenylphosphinothioyl, Fmoc and the like.
- the carboxyl group may be, for example, alkyl esterified (for example, methyl, ethyl, propyl, butyl, butyl, butyl, cyclopentyl, cyclohexyl, cycloheptyl, cyclooctyl, 2-adamantyl, etc.) Or cyclic alkyl esterification), aralkyl esterification (eg, benzyl ester, 412 trobenzyl ester, 4-methoxybenzyl ester, 4-methyl benzyl ester, benzhydryl esterification), phenacyl ester , Benzyloxycarbonyl hydrazide, tertiary butoxycarbonyl hydrazide, trityl hydrazide and the like.
- alkyl esterified for example, methyl, ethyl, propyl, butyl, butyl, butyl, cyclopentyl, cyclohe
- the hydroxyl group of serine can be protected, for example, by esterification or etherification.
- a group suitable for this esterification for example, a lower alkanol group such as an acetyl group, an aroyl group such as a benzoyl group, a group derived from carbonic acid such as a benzyloxycarbonyl group, an ethoxycarponyl group, and the like are used.
- Examples of a group suitable for etherification include a benzyl group, a tetrahydroviranyl group, and a t-butyl group.
- the protecting group of the phenolic hydroxyl group of tyrosine for example, B z 1, C 1 2 - B zl, 2- nitrobenzyl, B r- Z, as a protecting group of imidazo Ichiru histidines such tertiary butyl is used
- B z 1, C 1 2 - B zl, 2- nitrobenzyl, B r- Z as a protecting group of imidazo Ichiru histidines such tertiary butyl is used
- Tos 4-methoxy-2,3,6-trimethylbenzenesulfonyl, DNP, benzyloxymethyl, Bum, Boc, Trt, Fmoc and the like are used.
- Activated carboxylic acid groups of the raw material include, for example, the corresponding acid anhydride Product, azide, active ester [alcohol (for example, pentachlorophenol, 2,4,5-trichlorophenol, 2,4-dinitrophenol, cyanomethyl alcohol, paranitrophenol, HONB, N-hydroxysuccinimide , N-hydroxyphthalimide, ester with H ⁇ B t)].
- active ester for example, pentachlorophenol, 2,4,5-trichlorophenol, 2,4-dinitrophenol, cyanomethyl alcohol, paranitrophenol, HONB, N-hydroxysuccinimide , N-hydroxyphthalimide, ester with H ⁇ B t
- activated amino group of the raw material for example, a corresponding phosphoric amide is used.
- Methods for removing (eliminating) protecting groups include, for example, catalytic reduction in a stream of hydrogen in the presence of a catalyst such as Pd-black or Pd_carbon, hydrogen anhydride, methanesulfonic acid, and the like.
- the elimination reaction by the above-mentioned acid treatment is generally carried out at a temperature of about 120 ° C.
- the protection of the functional group which should not be involved in the reaction of the raw materials, the protecting group, the elimination of the protective group, the activation of the functional group involved in the reaction, and the like can be appropriately selected from known groups or known means.
- a peptide (protein) chain is added to the amino group side to a desired length. After the elongation, a protein in which only the -amino group protecting group at the ⁇ -terminal of the peptide chain was removed and a protein in which only the carboxyl group at the C-terminus was removed were produced. Condensate in a mixed solvent. Details of the condensation reaction are the same as described above. After purifying the protected protein obtained by the condensation, all the protecting groups are removed by the above-mentioned method, and a desired crude protein can be obtained. This crude protein is purified by various known purification means, and the main fraction is freeze-dried to obtain an amide of the desired protein.
- ester for example, after condensing a carboxyl group of a carboxy-terminal amino acid with a desired alcohol to form an amino acid ester, the ester of the desired protein is converted in the same manner as the amide of the protein. Obtainable.
- the partial peptide of the protein of the present invention or a salt thereof can be produced according to a known peptide synthesis method or by cleaving the protein of the present invention with an appropriate peptidase.
- a peptide synthesis method for example, any of a solid phase synthesis method and a liquid phase synthesis method may be used. That is, the objective peptide can be produced by condensing a partial peptide or amino acid capable of constituting the protein of the present invention with the remaining portion, and if the product has a protecting group, removing the protecting group to produce the desired peptide.
- Known methods of condensation and elimination of the protecting group include, for example, the methods described in the following 1 to 5.
- the partial peptide of the present invention can be purified and isolated by a combination of ordinary purification methods such as solvent extraction, distillation, column chromatography, liquid chromatography, and recrystallization.
- the partial peptide obtained by the above method is a free form, it can be converted to an appropriate salt by a known method, and conversely, when it is obtained as a salt, it is converted to a free form by a known method. be able to.
- the polynucleotide encoding the receptor protein of the present invention is as described above. Any nucleotide may be used as long as it contains a nucleotide sequence (DNA or RNA, preferably DNA) encoding the receptor protein of the present invention.
- the polynucleotide is DNA such as DNA or mRNA encoding the receptor protein of the present invention, and may be double-stranded or single-stranded. In the case of double-stranded, it may be double-stranded DNA, double-stranded RNA or DNA: RNA hybrid. In the case of a single strand, it may be a sense strand (ie, a coding strand) or an antisense strand (ie, a non-coding strand).
- the receptor of the present invention can be prepared, for example, according to the method described in the well-known experimental medicine special edition “New PCR and its application” 15 (7), 1997 or a method analogous thereto. Yuichi Protein mRNA can be quantified.
- the DNA encoding the receptor protein of the present invention may be any of genomic DNA, genomic DNA library, the above-described cDNA derived from cells and tissues, one of the above-described cDNA libraries derived from cells and tissues, and synthetic DNA.
- the vector used for the library may be any of bacteriophage, plasmid, cosmid, phagemid and the like. Alternatively, it can also be directly amplified by reverse transcriptase polymerase chain reaction (hereinafter abbreviated as RT-PCR method) using a total RNA or mRNA fraction prepared from the cells and tissues described above.
- the DNA encoding the receptor protein of the present invention for example, a DNA containing the nucleotide sequence represented by SEQ ID NO: 2 or a DNA having the nucleotide sequence represented by SEQ ID NO: 2 And a DNA that hybridizes under high stringent conditions, and has substantially the same activity (eg, ligand binding activity, signal transduction action, etc.) as the receptor protein of the present invention.
- Any DNA may be used as long as it encodes a protein.
- Examples of the DNA that hybridizes with the DNA having the nucleotide sequence represented by SEQ ID NO: 2 under high stringency conditions include, for example, about 70% or more, preferably about 70% or more of the nucleotide sequence represented by SEQ ID NO: 2.
- Hybridization is performed according to a known method or a method analogous thereto, for example, the method described in Molecular Cloning 2nd (J. Sambrook et al., Cold Spring Harbor Lab. Press, 1989). be able to.
- the procedure can be performed according to the method described in the attached instruction manual. More preferably, it can be performed under high stringent conditions.
- the high stringent conditions include, for example, a sodium concentration of about 19 to 40 mM, preferably about 19 to 20 mM, and a temperature of about 50 to 70, preferably about 60 to 6 mM.
- the conditions at 5 ° C are shown.
- the case where the sodium concentration is about 19 mM and the temperature is about 65 ° C is most preferable.
- DNA encoding the receptor protein containing the amino acid sequence represented by SEQ ID NO: 1 a DNA containing the base sequence represented by SEQ ID NO: 2 or the like is used. .
- a polynucleotide comprising a part of the base sequence of DNA encoding the receptor protein of the present invention or a part of the base sequence complementary to the DNA is a DNA encoding the following partial peptide of the present invention. It is used to mean not only NA but also RNA.
- an antisense polynucleotide capable of inhibiting the replication or expression of a G protein-coupled receptor protein gene has been cloned or determined. It can be designed and synthesized based on the nucleotide sequence information of the DNA to encode. Such a polynucleotide (nucleic acid) can hybridize with the RNA of the G protein-coupled receptor protein gene and inhibit the synthesis or function of the RNA, or can bind to the G protein-coupled receptor protein. Through the interaction with RNA, the expression of G protein-coupled receptor protein gene can be regulated and controlled.
- Polynucleotides that are complementary to the selected sequence of the G protein-coupled receptor protein-related RNA and that can specifically hybridize with the G protein-coupled receptor protein-related RNA are native G-protein coupled receptors in vivo and in vitro It is useful for regulating and controlling the expression of a single protein gene, and is also useful for treating or diagnosing diseases.
- the term "corresponding" means having homology or being complementary to a specific sequence of nucleotides, base sequences or nucleic acids including genes.
- nucleotide, nucleotide sequence or nucleic acid and a peptide (protein) usually refers to the amino acid of the peptide (protein) as directed by the nucleotide (nucleic acid) sequence or its complement.
- the 'end untranslated region, the 3' end palindrome region, and the 3 'end hairpin loop may be selected as preferred regions of interest, but any region within the G protein-coupled receptor protein gene may be selected as the region of interest.
- Antisense polynucleotides are 2-deoxy-D-report-containing polydeoxynucleotides, D-report-containing polydeoxynucleotides, N-glycosides of purine or pyrimidine bases, and others.
- polymers having a non-nucleotide backbone eg, commercially available protein nucleic acids and synthetic sequence-specific nucleic acid polymers
- polymers containing special bonds provided that the polymer is Base pairs such as those found in DNA and RNA, and nucleotides having arrangements that allow base attachment).
- They can be double-stranded DNA, single-stranded DNA, double-stranded RNA, single-stranded RNA, and even DNA: RNA hybrids, and can be unmodified polynucleotides (or unmodified polynucleotides).
- Oligonucleotides and one or more naturally-occurring modified nucleotides, such as labeled, capped, or methylated nucleotides known in the art.
- Substituted with an intramolecular nucleotide for example, having an uncharged bond (eg, methylphosphonate, phosphotriester, phosphoramidate, olebamate, etc.), charged bond or sulfur-containing Bond (eg, phosphorothioate, phosphorodithioe
- proteins eg, nucleases, nuclease-inhibitors, toxins, antibodies, signal peptides, poly-L-lysine, etc.
- sugars eg, monosaccharides.
- Compounds with incandescent compounds eg, acridine, psoralen, etc.
- chelates eg, metals, radioactive metals, boron, oxidizable metals, etc.
- nucleic acid may include not only those containing purine and pyrimidine bases but also those having other modified heterocyclic bases. Such modifications may include methylated purines and pyrimidines, acylated purines and pyrimidines, or other heterocycles. Modified nucleotides and modified nucleotides may also be modified at the sugar moiety, e.g., where one or more hydroxyl groups have been replaced with halogens, aliphatic groups, etc., or ethers, amines, etc. May be converted to a functional group.
- the antisense polynucleotide (nucleic acid) of the present invention is an RNA, a DNA, or a modified nucleic acid (RNA, DNA).
- modified nucleic acid include, but are not limited to, sulfur derivatives of nucleic acids, thiophosphate derivatives, and those resistant to polynucleoside amides and oligonucleoside amides.
- the antisense nucleic acid of the present invention can be preferably designed according to the following policy. In other words, it makes the antisense nucleic acid more stable in the cell, increases the cell permeability of the antisense nucleic acid, increases the affinity for the target sense strand, and is toxic. Then make the toxicity of the antisense nucleic acid smaller.
- the antisense nucleic acids of the present invention may contain altered or modified sugars, bases, or bonds, and may be provided in special forms such as liposomes and microspheres. Or be applied by gene therapy or given in an added form.
- additional forms include polyfunctional lysines, such as polylysine, which act to neutralize the charge on the phosphate backbone, and lipids, which enhance interaction with cell membranes and increase nucleic acid uptake. (Eg, phospholipid, cholesterol, etc.).
- Preferred lipids for addition include cholesterol and its derivatives (eg, cholesteryl chromate formate, cholic acid, etc.).
- nucleic acids can be attached to the 3 'end or the 5' end of the nucleic acid, and can be attached via a base, sugar, or intramolecular nucleoside bond.
- Other groups include capping groups specifically located at the 3, 5 'or 5' end of nucleic acids to prevent degradation by nucleases such as exonuclease and RNase. Examples of such a capping group include, but are not limited to, hydroxyl-protecting groups known in the art, such as glycols such as polyethylene glycol and tetraethylene glycol.
- the antisense nucleic acid inhibitory activity is examined using the transformant of the present invention, the in vivo or in vitro gene expression system of the present invention, or the in vivo or in vitro translation system of the G protein-coupled receptor protein. be able to.
- the nucleic acid can be applied to cells by various known methods.
- the DNA encoding the partial peptide of the present invention may be any DNA containing the above-described nucleotide sequence encoding the partial peptide of the present invention.
- Any of the NA library, the above-described cell / tissue-derived cDNA, the above-described cell / tissue-derived cDNA library, and the synthetic DNA may be used.
- the vector used for the library may be any of bacteriophage, plasmid, cosmid, phagemid and the like. Alternatively, it can be directly amplified by reverse transcriptase polymerase chain reaction (hereinafter, abbreviated as RT-PCR method) using an mRNA fraction prepared from the above-mentioned cell 'tissue.
- RT-PCR method reverse transcriptase polymerase chain reaction
- examples of the DNA encoding the partial peptide of the present invention include: (1) a DNA having a partial nucleotide sequence of a DNA having a nucleotide sequence represented by SEQ ID NO: 2 NA or (2) a DNA having the nucleotide sequence represented by SEQ ID NO: 2 and a DNA that hybridizes under high stringent conditions, and having substantially the same activity as the receptor protein of the present invention (for example, DNA having a partial base sequence of DNA encoding a receptor protein having ligand binding activity, signal transduction action, etc.) is used.
- Examples of the DNA that hybridizes with the DNA having the nucleotide sequence represented by SEQ ID NO: 2 under high stringency conditions include, for example, about 70% or more, preferably about 70% or more of the nucleotide sequence represented by SEQ ID NO: 2.
- DNA containing a nucleotide sequence having a homology of 80% or more, more preferably about 90% or more, and most preferably about 95% or more is used.
- the receptor protein of the present invention may be used as a means for cloning a DNA which completely encodes the receptor protein of the present invention or its partial peptide (hereinafter, sometimes abbreviated as the receptor protein of the present invention). Amplify by the PCR method using a synthetic DNA primer having a partial base sequence of the base sequence of the DNA to be encoded, or incorporate the DNA incorporated into an appropriate vector into a part of the receptor protein of the present invention.
- the DNA can be selected by hybridization with a DNA fragment encoding the entire region or labeled with a synthetic DNA. The hybridization can be performed according to, for example, the method described in Molecular Cloning 2nd (J. Sambrook et al., Cold Spring Harbor Lab. Press, 1989). When a commercially available library is used, it can be performed according to the method described in the attached instruction manual.
- the DNA base sequence can be replaced using PCR or a known kit, for example, Mutan TM -super Express Km (Takara Shuzo), Mutan TM -K (Takara Shuzo), etc., using the ODA-LA PCR method, the Gupped duplex method, or the Kunkel method. It can be carried out according to a known method such as a method or a method analogous thereto.
- the cloned DNA encoding the receptor protein can be used as it is depending on the purpose, or can be used after digestion with a restriction enzyme or addition of a linker, if desired.
- the DNA has ATG as a translation initiation codon at its 5 'end and TAA, TGA or TAG as a translation termination codon at its 3' end. You may have. These translation initiation codon and translation termination codon can also be added using an appropriate synthetic DNA adapter.
- the expression vector for the receptor protein of the present invention is, for example, (a) cutting out a DNA fragment of interest from DNA encoding the receptor protein of the present invention, and (mouth) converting the DNA fragment into an appropriate expression vector. It can be manufactured by connecting it downstream of the promoter.
- vectors include Escherichia coli-derived plasmids (eg, pCR4, pCR2.1, pBR322, pBR325, pUC12, pUC13), Bacillus subtilis-derived plasmids (eg, pUB110, pTP5, pC194), In addition to yeast-derived plasmids (eg, pSH19, pSH15), bacteriophages such as ⁇ phage, animal viruses such as retrovirus, vaccinia virus, and baculovirus, ⁇ A1-11, ⁇ 1, pRc / CMV, pRc / RSV, pc DNA IN eo and the like are used.
- Escherichia coli-derived plasmids eg, pCR4, pCR2.1, pBR322, pBR325, pUC12, pUC13
- Bacillus subtilis-derived plasmids eg, pUB110, pTP
- the promoter used in the present invention may be any promoter as long as it is appropriate for the host used for gene expression.
- SR promoter promoter when animal cells are used as hosts, SR promoter promoter, SV40 promoter, LTR promoter promoter, CMV promoter, HSV-TK promoter, etc.
- CMV promoter CMV promoter
- SR ⁇ promoter promoter it is preferable to use one or the like.
- trp promoter When the host is Eshierihia genus bacterium, trp promoter, lac flop port motor -, re cA promoter, AP L promoter evening one, such as lpp promoter evening one is, when the host is Bacillus, SP 01 promoter evening one, SPO 2 flops port motor - and p en p promoter, if the host is a yeast, PH05 flop port motor, PGK promoter evening one, GAP promoter, etc. ADH promoter are preferred. When the host is an insect cell, a polyhedrin promoter, a P10 promoter and the like are preferable.
- an expression vector containing, if desired, an enhancer, a splicing signal, a polyA addition signal, a selection marker, and an SV40 replication origin (hereinafter sometimes abbreviated as SV40 ori) may be used.
- SV40 ori an SV40 replication origin
- DHF r dihydrofolate reductase
- MTX metalhotrexate
- Amp r ampicillin phosphorus resistant gene
- Ne omycin resistant gene hereinafter sometimes abbreviated as Ne o r, G418 resistance.
- the target gene when used as a selectable marker in CHO (dh fr ") cells, the target gene can be selected using a thymidine-free medium.
- a signal sequence suitable for the host can be used. It is added to the N-terminal side of the receptor protein of the present invention. If the host is a bacterium belonging to the genus Escherichia, a PhoA * signal sequence, an OmpA signal sequence, etc., or if the host is a bacterium belonging to the genus Bacillus, 0! —Amylase ⁇ signal sequence, subtilisin ⁇ signal sequence, etc. If the host is yeast, MFo! ⁇ Signal sequence, SUC2 ⁇ signal sequence, etc. If the host is an animal cell, insulin ⁇ signal sequence, ⁇ -interface and signal sequence, antibody molecule and signal sequence can be used.
- a transformant can be produced using the thus constructed vector containing DN ⁇ encoding the receptor protein of the present invention.
- Escherichia bacteria for example, Escherichia bacteria, Bacillus bacteria, yeast, insect cells, insects, animal cells, and the like are used.
- Escherichia examples include Escherichia coli Kl 2 ⁇ DH1 (Procedures of the National Academy of Sciences, Proc. Natl. Acad. Sci. US A), 60, 160 (1968)], JMl 03 [Nucleic Acids Research, (Nucleic Acids Research), 9, 309 (1981)], JA221 [Journal of Ob. ⁇ Molecular ⁇ Biology (Journal of Molecular Biology), 120, 517 (1978)], HB 101 [Journal of Mole Kiyura 'Biology, 41, 459 (1969)], C 600 [Dieneti (Genetics), 39, 440 (1954)], DH 5 «[Inoue, H., Noja, H.
- Bacillus bacteria examples include, for example, Bacillus subtilis MI 114 [Gene, 24, 255 (1983)], 207-21 [Journal of Biochemistry, 95, 87 (1 984)].
- yeast examples include Saccharomyces cerevisiae AH22, AH22R-, NA87-11A, DKD-5D, 20B-
- Insect cells include, for example, when the virus is AcNPV, a cell line derived from a larva of night roth moth (Spodoptera frugiperda cell; Sf cell), MGl cell derived from the midgut of Trichoplusia ni, High derived from egg of Trichoplusia ni Five TM cells, cells derived from Mamestra b rassicae or cells derived from Estigmena acrea are used.
- Sf cells include Sf9 cells (ATCC CRL 1711), Sf21 cells (Vaughn, J.L., et al., In Vivo,
- insects for example, silkworm larvae are used [Maeda et al., Nature, 315, 592 (1985)].
- animal cells for example, monkey cells COS-7, Vero, Chinese Eight Muscle Yuichi cell CHO (hereinafter abbreviated as CHO cells), dh fr gene deficient Chinese Hamus Yuichi cell CHO (hereinafter CHO (dhfr- ) Cells are abbreviated), mouse L cells, mouse AtT-20, mouse myeloma cells, rat GH3, and human FL cells.
- CHO cells Chinese Eight Muscle Yuichi cell CHO (hereinafter abbreviated as CHO cells)
- CHO (dhfr- ) Cells are abbreviated
- mouse L cells mouse AtT-20
- mouse myeloma cells rat GH3, and human FL cells.
- Bacillus spp. Can be transformed, for example, according to the method described in Molecular & General Genetics, Vol. 168, 111 (1979).
- Insect cells or insects can be transformed, for example, according to the method described in Bio / Technology, 6, 47-55 (1988).
- Transformation of animal cells can be performed, for example, by the methods described in Cell Engineering Separate Volume 8, New Cell Engineering Experiment Protocol. 263-267 (1995) (published by Shujunsha), Virology, 52, 456 (1973). It can be performed according to the method.
- a liquid medium is suitable as the medium used for the culturing, and a carbon source necessary for the growth of the transformant is contained therein.
- the carbon source include glucose, dextrin, soluble starch, and sucrose.
- the nitrogen source include ammonium salts, nitrates, corn chip liquor, peptone, casein, meat extract, soybean meal, and potato extract.
- the inorganic or organic substance and the inorganic substance include calcium chloride, sodium dihydrogen phosphate, magnesium chloride, and the like.
- yeast extract, vitamins, growth promoting factors and the like may be added.
- the pH of the medium is preferably about 5-8.
- a medium for culturing the genus Escherichia for example, an M9 medium containing glucose and casamino acid [Miller, Journal of Experiments in Molecular Genetics (Journal of Experiments in Molecu) lar Genetics), 431-433, Cold Spring Harbor Laboratory, New York 1972].
- a drug such as 33-indolylacrylic acid can be added in order to make the promotion work efficiently.
- cultivation is usually performed at about 15 to 43 ° C for about 3 to 24 hours, and if necessary, aeration and stirring can be applied.
- the cultivation is usually performed at about 30 to 40 ° C. for about 6 to 24 hours, and if necessary, aeration and stirring may be added.
- the culture medium When culturing a transformant whose host is an insect cell or an insect, the culture medium was immobilized in Grace's Insect Medium (Grace, TC, Nature, 195, 788 (1962)). For example, those to which additives such as% P serum are appropriately added are used.
- the ⁇ of the culture medium is adjusted to about 6.2 to 6.4. Culture is usually performed at about 27 ° C for about 3 to 5 days, and aeration and / or agitation are added as necessary.
- examples of the medium include a MEM medium containing about 5 to 20% fetal bovine serum [Science, 122, 501 (1952)], a DMEM medium [Virology, 8, 396 (1959)), RPMI 1640 medium [Journal of the American Medical Association at The Journal of the American Medical Association at 199, 519 (1967) )], 199 medium [Proceeding of the Society for the Biological Medicine, 73, 1 (1950)] Used.
- the pH is about 6-8. Cultivation is usually performed at about 30 ° (: up to 40 ° C) for about 15 to 60 hours.
- the G protein-coupled receptor protein of the present invention can be produced in the cell, in the cell membrane, or outside the cell of the transformant.
- Isolation and purification of the receptor protein of the present invention from the above culture can be performed, for example, by the following method.
- the cells or cells are collected by a known method, suspended in a suitable buffer, and subjected to ultrasound, lysozyme and / or lysozyme. After the cells or cells are broken by freeze-thawing or the like, a method of obtaining a crude extract of the receptor protein by centrifugation or filtration is appropriately used.
- the buffer may contain a protein denaturing agent such as urea or guanidine hydrochloride, or a surfactant such as Triton X-100 TM.
- Purification of the receptor protein contained in the culture supernatant or extract obtained in this manner can be performed by appropriately combining known separation and purification methods.
- known separation and purification methods include methods using solubility such as salting out and solvent precipitation, dialysis, ultrafiltration, gel filtration, and SDS-polyacrylamide gel electrophoresis.
- a method using the difference in aqueous solution, a method using the difference in isoelectric point such as isoelectric focusing, and the like are used.
- the receptor protein thus obtained When the receptor protein thus obtained is obtained as a free form, it can be converted into a salt by a known method or a method analogous thereto, and conversely, when the protein is obtained as a salt, a known method or analogous method Depending on the method, it can be converted into a free form or another salt.
- the recombinant protein produced by the recombinant is treated with an appropriate protein-modifying enzyme before or after purification to allow any modification or polypeptide modification. It can also be partially removed.
- an appropriate protein-modifying enzyme for example,
- Chymotrypsin, arginyl endopeptidase, protein kinase, glycosidase and the like are used.
- the activity of the receptor protein of the present invention or a salt thereof thus produced can be measured by a binding experiment with a labeled ligand, an enzymimnoassay using a specific antibody, or the like.
- the antibody against the receptor protein of the present invention or its partial peptide or a salt thereof may be any of a polyclonal antibody and a monoclonal antibody as long as it can recognize the receptor protein of the present invention or its partial peptide or its salt. Is also good.
- An antibody against the receptor protein of the present invention or its partial peptide or a salt thereof may be prepared by using the receptor protein of the present invention as an antigen and a known antibody. It can be produced according to the antibody or antiserum production method.
- the receptor protein or the like of the present invention is administered to a mammal at a site capable of producing an antibody by administration itself or together with a carrier or a diluent.
- Complete Freund's adjuvant or incomplete Freund's adjuvant may be administered in order to enhance the antibody-producing ability upon administration. Administration is usually performed once every 2 to 6 weeks, for a total of about 2 to 10 times. Examples of mammals to be used include monkeys, egrets, dogs, guinea pigs, mice, rats, sheep, and goats, and mice and rats are preferably used.
- a warm-blooded animal immunized with the antigen for example, a mouse with an antibody titer is selected from the mouse, and the spleen or lymph node is collected 2 to 5 days after the final immunization.
- a monoclonal antibody-producing hybridoma can be prepared.
- the antibody titer in the antiserum can be measured, for example, by reacting a labeled receptor protein or the like described below with the antiserum and measuring the activity of a labeling agent bound to the antibody. Can do it.
- the fusion operation can be performed according to a known method, for example, the method of Koehler and Milstein [Nature, 256, 495 (1975)].
- the fusion promoter include polyethylene glycol (PEG) and Sendai virus, and PEG is preferably used.
- myeloma cells examples include NS-1, P3U1, SP2 / 0 and the like, and P3U1 is preferably used.
- the preferred ratio between the number of antibody-producing cells (spleen cells) and the number of myeloma cells used is about 1: 1 to 20: 1, and the concentration of PEG (preferably PEG1000 to PEG6000) is about 10 to 80%.
- PEG preferably PEG1000 to PEG6000
- hybridomas can be cultured on a solid phase (eg, microplate) onto which an antigen such as a receptor protein has been directly or adsorbed with a carrier. Then, anti-immunoglobulin antibody (anti-mouse immunoglobulin antibody is used if the cells used for cell fusion are mice) or protein A, which is labeled with a radioactive substance or an enzyme, is added.
- a solid phase eg, microplate
- antigen such as a receptor protein has been directly or adsorbed with a carrier.
- anti-immunoglobulin antibody anti-mouse immunoglobulin antibody is used if the cells used for cell fusion are mice
- protein A which is labeled with a radioactive substance or an enzyme
- a method for detecting monoclonal antibodies bound to the antibody adding a hybridoma culture supernatant to a solid phase to which anti-immunoglobulin antibody or protein A has been adsorbed, adding a receptor protein or the like labeled with a radioactive substance, an enzyme, etc. And a method for detecting a monoclonal antibody conjugated to the enzyme.
- the selection of the monoclonal antibody can be carried out according to a known method or a method analogous thereto. Usually, it can be carried out in a medium for animal cells to which HAT (hypoxanthine, aminopterin, thymidine) is added.
- HAT hyperxanthine, aminopterin, thymidine
- any medium can be used as long as it can grow a hybridoma.
- RPMI 1640 medium containing 1 to 20%, preferably 10 to 20% fetal bovine serum, GIT medium containing 1 to 10% fetal bovine serum (Wako Pure Chemical Industries, Ltd.) or a hybridoma culture medium Serum medium (SFM-101, Nissui Pharmaceutical Co., Ltd.) or the like can be used.
- the culturing temperature is usually 20 to 40 ° (:, preferably, about 37 ° C.
- the culturing time is usually 5 days to 3 weeks, preferably, 1 week to 2 weeks.
- the culture can be usually performed under 5% carbon dioxide gas.
- the antibody titer of the hybridoma culture supernatant can be measured in the same manner as the measurement of the antibody titer in the antiserum described above.
- Monoclonal antibodies can be separated and purified in the same manner as normal polyclonal antibodies. [Examples: salting out, alcohol precipitation, isoelectric focusing, electrophoresis, ion exchangers (ex. , DEAE), ultracentrifugation, gel filtration, antigen-binding solid phase or specific antibody obtained by collecting only the antibody with an active adsorbent such as protein A or protein G, and dissociating the bond to obtain the antibody. Purification method].
- the polyclonal antibody of the present invention can be produced according to a known method or a method analogous thereto.
- a complex of an immunizing antigen an antigen such as the receptor protein of the present invention
- a carrier protein is formed, and a mammal is immunized in the same manner as in the above-described method for producing a monoclonal antibody. It can be produced by collecting a substance containing an antibody against a receptor protein or the like and separating and purifying the antibody.
- the type of carrier-protein and the mixing ratio of carrier to hapten are determined by the antibody against the hapten immunized by cross-linking the carrier.
- any efficiency may be used to crosslink any material at any ratio.
- serum serum albumin, thyroglobulin, keyhole, lysate, hemocyanin, etc. may be used in a weight ratio of hapten.
- a method of coupling at a rate of about 0.1 to 20, preferably about 1 to 5 is used.
- various condensing agents can be used for force coupling between the hapten and the carrier.
- an active ester reagent containing a daltaraldehyde, a carbodiimide, a maleimide active ester, a thiol group or a dithioviridyl group is used.
- the condensation product is administered to a warm-blooded animal itself or together with a carrier or diluent at a site where antibody production is possible.
- Complete Freund's adjuvant / incomplete Freund's adjuvant may be administered in order to enhance the antibody-producing ability upon administration.
- the administration can usually be performed once every about 2 to 6 weeks, for a total of about 3 to 10 times.
- the polyclonal antibody can be collected from the blood, ascites, etc., preferably from the blood of the mammal immunized by the above method.
- the measurement of the polyclonal antibody titer in the antiserum can be performed in the same manner as the measurement of the antibody titer in the serum described above. Separation and purification of the polyclonal antibody can be carried out according to the same immunoglobulin separation and purification method as the above-mentioned separation and purification of the monoclonal antibody.
- the receptor protein or its salt, its partial peptide or its salt, and the DNA encoding the receptor protein or its partial peptide of the present invention are: (1) the G protein-coupled receptor of the present invention; Determination of ligand (agonist) for protein, (2) preventive and / or therapeutic agent for diseases associated with dysfunction of G protein-coupled receptor protein of the present invention, (3) genetic diagnostic agent, 4) a method for screening a compound that changes the expression level of the receptor protein or its partial peptide of the present invention; (5) various diseases containing a compound that changes the expression level of the receptor protein or its partial peptide of the present invention (6) a method for quantifying a ligand for the G protein-coupled receptor protein of the present invention, (7) a G protein-coupled receptor protein of the present invention For screening compounds (eg, agonists, angelists, etc.) that alter the binding between a protein and a ligand, (8) altering the binding between a G protein-combined receptor Yuichi protein of the present invention and
- mammal-specific G protein sharing can be achieved.
- Compounds that alter the binding of the ligand to the receptor-type receptor eg, agonist, angelic gonist, etc.
- the agonist or angelic gonist can be used as a preventive or therapeutic agent for various diseases.
- DNA encoding the receptor protein of the present invention or its partial peptide or a salt thereof hereinafter, sometimes abbreviated as the receptor protein of the present invention, etc.
- the DNA encoding the receptor protein of the present invention or its partial peptide hereinafter, referred to as the following).
- the use of an antibody against the receptor protein of the present invention or the like hereinafter sometimes abbreviated as the antibody of the present invention will be specifically described below.
- the receptor protein of the present invention or a salt thereof or the partial peptide or a salt thereof of the present invention is a reagent for searching for or determining a ligand (agonist) for the receptor protein of the present invention or a salt thereof.
- the present invention provides a method for determining a ligand for the receptor protein of the present invention, which comprises contacting the receptor protein of the present invention or a salt thereof or the partial peptide of the present invention or a salt thereof with a test compound. I do.
- known ligands for example, angiotensin, bombesin, canapinoid, cholecystokinin, glutamine, serotonin, melatonin, neuropeptide Y, opioid, purine, vasopressin, oxytocin, ⁇ ACAP (eg, PACAP 27, PACAP 38), secretin, glucagon, calcitonin, 7-drenomediyuline, somatos-tin, GHRH, CRF, ACTH, GRP, PTH, VIP human active intestinal and related polypeptides), somatostatin, dopamine, motilin, ami Phosphorus, bradykinin, CGRP (calcitonin irrelated peptide), leukotriene, pancreatastin, prostaglandin, tropoxan, adenosine, adrenaline, chemokinesperfamily (Eg, CXC chemokine subamily such as IL-18, GRO
- the ligand determination method of the present invention uses the receptor protein of the present invention or its partial peptide or a salt thereof, or constructs an expression system for a recombinant receptor protein, and By using the receptor binding assay system used, it binds to the receptor binding protein of the present invention and has a cell stimulating activity (eg, arachidonic acid release, acetylcholine release, intracellular Ca 2+ release, intracellular cAMP).
- a cell stimulating activity eg, arachidonic acid release, acetylcholine release, intracellular Ca 2+ release, intracellular cAMP.
- Peptide, protein, non-peptidic compound, synthetic compound, fermentation product, etc. or a salt thereof.
- the receptor protein of the present invention or a partial peptide thereof is brought into contact with a test compound, for example, the amount of the test compound bound to the receptor protein or the partial peptide, It is characterized by measuring irritation activity.
- the present invention provides
- the labeled test compound When the labeled test compound is brought into contact with a receptor protein expressed on the cell membrane by culturing a transformant containing DNA encoding the receptor protein of the present invention, the labeled test compound A method for determining a ligand for a receptor protein of the present invention, which comprises measuring the amount of binding to a receptor protein or a salt thereof;
- Receptor protein-mediated cell stimulating activity e.g., arachidonic acid release, acetylcholine release, intracellular Ca 2+ release, cells
- a method for determining a ligand for the receptor protein of the present invention or a salt thereof and
- the receptor protein when the test compound is brought into contact with the receptor protein expressed on the cell membrane by culturing a transformant containing the DNA encoding the receptor protein of the present invention, through to cell stimulating activity (e.g., Arakido phosphate free, Asechirukorin release, intracellular C a 2 + release, intracellular c AM P generation, intracellular c GM P, production of inositol phosphate, changes in cell membrane potential, intracellular protein Phosphorylation, activation of c-fos, activity of suppressing or reducing pH, etc.) of the receptor of the present invention or a salt thereof.
- cell stimulating activity e.g., Arakido phosphate free, Asechirukorin release, intracellular C a 2 + release, intracellular c AM P generation, intracellular c GM P, production of inositol phosphate, changes in cell membrane potential, intracellular protein Phosphorylation, activation of c-fos, activity of suppressing or
- the receptor protein used in the method for determining a ligand includes the above-described present invention. Any receptor protein may be used as long as it contains the partial protein of the present invention or the partial peptide of the present invention, but a receptor protein expressed in large amounts using animal cells is suitable.
- the above expression method is used to produce the receptor protein of the present invention, but it is preferably carried out by expressing DNA encoding the receptor protein in mammalian cells or insect cells.
- a complementary DNA is usually used as the DNA fragment encoding the protein portion of interest, but is not necessarily limited to this.
- a gene fragment or a synthetic DNA may be used.
- the DNA fragment In order to introduce the DNA fragment encoding the receptor protein of the present invention into host animal cells and express them efficiently, the DNA fragment must be expressed in a baculovirus belonging to a baculovirus using an insect as a host.
- the amount and quality of the expressed receptor can be examined by a known method. For example, the method can be carried out according to the method described in the document CNaibi, P. et al., The Journal of Biological Chemistry (J. Biol. Chem.), 267, 19555-19559, 1992]. it can.
- the receptor protein of the present invention or a partial peptide thereof or a salt thereof includes the receptor protein or a partial peptide thereof or a salt thereof purified according to a known method.
- a cell containing the receptor protein or a cell membrane fraction thereof may be used.
- the cell When a cell containing the receptor protein of the present invention is used in the method for determining a ligand of the present invention, the cell may be immobilized with daltaraldehyde, formalin, or the like.
- the immobilization method can be performed according to a known method.
- the cell containing the receptor protein of the present invention refers to a host cell that expresses the receptor protein of the present invention.
- Escherichia coli, Bacillus subtilis, yeast, insect cells, animal cells, and the like are used.
- the cell membrane fraction refers to a cell membrane-rich fraction obtained by disrupting cells and then obtained by a known method. Cells can be crushed by crushing the cells with a Poer-Elvehjem homogenizer, crushing with a Warlinda blender ⁇ polytron (Kinema tica), crushing with ultrasonic waves, or pressing the cells with a French press to narrow the cells. Crushing by ejecting from a nozzle may be mentioned.
- a fractionation method by centrifugal force such as a fractionation centrifugation method or a density gradient centrifugation method is mainly used.
- the cell lysate is centrifuged at a low speed (500 rpm to 3000 rpm) for a short time (typically about 1 to 10 minutes), and the supernatant is further centrifuged at a higher speed (15000 rpm to 30000 rpm) for usually 30 minutes to 2 hours. Centrifuge and use the resulting precipitate as the membrane fraction.
- the membrane fraction is rich in expressed receptor proteins and membrane components such as cell-derived phospholipid / membrane proteins.
- the amount of receptor protein in cells containing the receptor protein and its membrane fraction is the amount of receptor protein in cells containing the receptor protein and its membrane fraction.
- receptor protein fraction a natural receptor protein fraction or a recombinant receptor fraction having an activity equivalent thereto is desirable.
- equivalent activity means equivalent ligand binding activity, signal transduction action, and the like.
- test compound [3 H], [125 I], [14 C], [35 S], etc. labeled with angiotensin, bombesin, Kanapinoido, cholecystokinin, glutamine, serotonin, melatonin, neuropeptide Peptide Y, opioid, purine, vasopressin, oxotocin, PACAP (e.g., PACAP27, ⁇ CAP38), secretin, glucagon, calcitonin, admrenomedullin, somatosustin, GHRH, CRF, ACTH, GRP, PTH, VI P (Vaso Active Intestinal and Retained Polypeptide), Somato Sugintin, dopamine, motilin, amylin, bradykinin, CGRP (calcitonin gene relayed peptide), leukotriene, pancreastatin, prostaglandin, tropoxane, adenosine, adrenal
- C chemokine subfamily CX 3 C chemokine subfamily such as fracta 1 kine, etc.), endothelin, enterogastrin, histami , Neurotensin, TRH, pancreatic polypeptide, galanin, lysophosphatidic acid (LPA), and sphingosine 1-phosphate are preferred.
- a cell or a membrane fraction of the cell containing the receptor protein of the present invention is converted into a buffer suitable for the determination method.
- the buffer may be any buffer such as a phosphate buffer having a pH of 4 to 10 (preferably pH 6 to 8) or a buffer such as Tris-HCl buffer, which does not inhibit the binding between the ligand and the receptor protein.
- various proteins such as CHAPS, Tween-80 TM (Kao-Ichi Atlas), digitonin, dexcholate, and other proteins such as serum albumin and gelatin are buffered.
- protease inhibitors such as PMS F, leptin, E-64 (manufactured by Peptide Research Institute), and peptide suptin can be added for the purpose of suppressing receptor degradation and ligand degradation by proteases.
- a certain amount 5000 c pm ⁇ 500000 c pm
- [3 H] [125 I]
- [14 C] the test compound-labeled, etc.
- [35 S] Coexist.
- Large excess to determine non-specific binding (NSB) Also prepare a reaction tube containing the unlabeled test compound. The reaction is carried out at about 0 ° C.
- reaction solution is filtered through a glass fiber filter paper and the like, washed with an appropriate amount of the same buffer, and the radioactivity remaining on the glass fiber filter paper is measured using a liquid scintillation count or an arc count.
- a test compound in which the count (B-NSB) obtained by subtracting the non-specific binding amount (NSB) from the total binding amount (B) exceeds 0 cpm is selected as a ligand (agonist) for the receptor protein of the present invention or a salt thereof. be able to.
- a cell stimulating activity via the receptor protein promotes C a 2+ release, intracellular cAMP generation, intracellular cGMP generation, inositol phosphate production, fluctuations in cell membrane potential, phosphorylation of intracellular proteins, activation of c-fos, decrease in pH, etc.
- Activity or inhibitory activity can be measured using a known method or a commercially available measurement kit. Specifically, first, cells containing the receptor protein are cultured on a multiwell plate or the like.
- the assay Before determining the ligand, replace the medium with a fresh medium or an appropriate buffer that is not toxic to cells, add the test compound, etc., incubate for a certain period of time, and extract the cells or collect the supernatant. Then, the generated product is quantified according to each method. If the production of a substance (for example, arachidonic acid) as an indicator of cell stimulating activity is difficult due to the presence of a degrading enzyme contained in the cells, the assay may be performed by adding an inhibitor against the degrading enzyme. Good. In addition, an activity such as inhibition of cAMP production can be detected as an activity of inhibiting production of cells whose basal production has been increased by forskolin or the like.
- a substance for example, arachidonic acid
- the kit for determining a ligand binding to the receptor protein of the present invention or a salt thereof includes the receptor protein of the present invention or a salt thereof, the partial peptide of the present invention or a salt thereof, a cell containing the receptor protein of the present invention, Alternatively, it contains a membrane fraction of cells containing the receptor protein of the present invention.
- the solution may be sterilized by filtration through a filter with a pore size of 0.45 m and stored in 4 ⁇ , or may be prepared at use.
- CHO cells expressing the receptor protein of the present invention were subcultured on a 12-well plate at 5 ⁇ 10 5 cells / well, and cultured for 2 days in 37 ⁇ 5% CO 2 , 95% air.
- Test compounds that are poorly soluble in water should be dissolved in dimethylformamide, DMSO, methanol, etc.
- the same as the labeled compound is prepared at a concentration 100 to 1000 times higher.
- the ligand capable of binding to the receptor protein of the present invention or a salt thereof includes, for example, substances specifically present in the brain, pituitary, heart, knee, adipose tissue, mammary gland, testis, and the like.
- the receptor protein of the present invention if the ligand for the receptor protein of the present invention is identified, depending on the action of the ligand, (1) the receptor protein of the present invention or (2) DNA encoding the receptor protein Is used as a medicament such as an agent for preventing and / or treating a disease associated with dysfunction of the receptor protein of the present invention.
- the receptor protein of the present invention or (2) DNA encoding the receptor protein Is used as a medicament such as an agent for preventing and / or treating a disease associated with dysfunction of the receptor protein of the present invention.
- the DNA encoding the receptor protein of the present invention is useful as a safe and low-toxic agent for preventing and / or treating a disease associated with dysfunction of the receptor protein of the present invention.
- the receptor protein of the present invention is a G protein-coupled receptor protein HM74 [Int. Immunol. 5 (10), 1239-1249 (1993)], a purinoceptor [Gene 171 (2), 2] 95-297 (1996)], or GPR31 [Genomics 42 (3), 519-523 (1997)], which has a homology of about 29-52% at the amino acid sequence level. It is a transmembrane type receptor protein.
- the receptor protein of the present invention or the DNA encoding the receptor protein may be a cardiovascular disease (eg, hypertension, cardiac hypertrophy, angina, arteriosclerosis, etc.), obesity, hyperlipidemia, diabetes, Inflammatory diseases (eg, allergy, asthma, rheumatism, etc.), cancer (eg, non-small cell lung cancer, ovarian cancer, prostate cancer, gastric cancer, bladder cancer, breast cancer, cervical cancer, colon cancer, rectal cancer, etc.), It is useful for prevention and Z or treatment of central diseases (eg, Alzheimer's disease, dementia, eating disorders, etc.).
- cardiovascular disease eg, hypertension, cardiac hypertrophy, angina, arteriosclerosis, etc.
- obesity e.g, hyperlipidemia, diabetes, Inflammatory diseases (eg, allergy, asthma, rheumatism, etc.)
- cancer eg, non-small cell lung cancer, ovarian cancer, prostate cancer, gastric cancer, bladder cancer, breast cancer, cervical cancer, colon cancer, rectal cancer, etc.
- the receptor protein of the present invention When used as the above-mentioned prophylactic / therapeutic agent, it can be formulated according to a conventional method.
- the DNA of the present invention when used as the above-mentioned prophylactic or therapeutic agent, the DNA of the present invention may be used alone or retrograde.
- a suitable vector such as a virus vector, an adenovirus vector, or an adenovirus associated virus vector
- the method can be carried out according to a conventional method.
- the DNA of the present invention is Alternatively, it can be administered with a gene gun or a catheter such as a hydrogel catheter, with adjuvants to promote uptake.
- the DNA encoding the receptor protein of the present invention or (2) the DNA encoding the receptor protein may be orally or as a sugar-coated tablet, capsule, elixir, microcapsule or the like, if necessary. It can be used parenterally in the form of injections, such as sterile solutions with water or other pharmaceutically acceptable liquids, or suspensions.
- the amount of the active ingredient in these preparations is such that a suitable dosage in the specified range can be obtained.
- additives that can be incorporated into tablets, capsules, etc. include binders such as gelatin, corn starch, tragacanth, gum arabic, excipients such as crystalline cellulose, corn starch, gelatin, and alginic acid. Swelling agents such as sucrose, lubricating agents such as magnesium stearate, sweetening agents such as sucrose, lactose or saccharin, and flavoring agents such as peppermint, cocoa oil or cellulose.
- the unit dosage form is a capsule, the above type of material can further contain a liquid carrier such as an oil or fat.
- Sterile compositions for injection can be formulated according to standard pharmaceutical practice, such as dissolving or suspending the active substance in vehicles such as water for injection, and naturally occurring vegetable oils such as sesame oil and coconut oil. it can.
- aqueous liquid for injection for example, physiological saline, isotonic solution containing glucose and other adjuvants (for example, D-sorbitol, D-mannitol, sodium chloride, etc.) and the like are used.
- Agents such as alcohol (eg, ethanol), polyalcohol (eg, propylene glycol, polyethylene daricol), and nonionic surfactants (eg, Polysorbate 80 TM, HCO-50) You may.
- the oily liquid for example, sesame oil, soybean oil and the like are used, and may be used in combination with solubilizers such as benzyl benzoate and benzyl alcohol.
- the prophylactic / therapeutic agent is, for example, a buffer (eg, phosphate buffer, acetic acid).
- a buffer eg, phosphate buffer, acetic acid.
- Sodium buffer eg, phosphate buffer, acetic acid
- soothing agent eg, benzalkonium chloride, procaine hydrochloride, etc.
- stabilizer eg, human serum albumin, polyethylene glycol, etc.
- preservative eg, benzyl alcohol, phenol, etc.
- antioxidant eg.g. benzyl alcohol, phenol, etc.
- the prepared injection solution is usually filled in a suitable ampoule.
- the preparations obtained in this way are safe and low toxic, so they can be used, for example, in mammals (eg, humans, rats, mice, puppies, sheep, bush, puppies, cats, cats, dogs, sal, etc.). Can be administered.
- the dose of the receptor protein of the present invention varies depending on the administration subject, target organ, symptoms, administration method, and the like.
- oral administration for example, in a patient with cancer (as 60 kg), it is generally required to be administered per day. It is about 0.1 mg to 100 mg, preferably about 1.0 to 50 mg, more preferably about 1.0 to 20 mg.
- parenteral administration the single dose varies depending on the administration subject, target organ, symptoms, administration method, and the like.
- injection it is usually used, for example, for cancer patients (60 kg). It is convenient to administer about 0.01 to 3 Omg per day, preferably about 0.1;! To about 20 mg, more preferably about 0.1 to 1 Omg by intravenous injection.
- the amount converted per 60 kg can be administered.
- the dosage of the DNA of the present invention varies depending on the administration subject, target organ, symptoms, administration method, and the like.
- oral administration in general, for example, in a cancer patient (as 6 O kg), the It is about 0.1 mg to 100 mg per day, preferably about 1.0 to 50 mg, more preferably about 1.0 to 20 mg per day.
- parenteral administration the single dose varies depending on the administration target, target organ, symptoms, administration method, etc.
- injection it is usually, for example, a cancer patient (as 6 O kg)
- the dose can be administered in terms of 60 kg.
- the DNA of the present invention can be used in mammals (eg, human, rat, mouse, egret, sheep, pig, pig, cat, dog, monkey, etc.). Can detect abnormalities (genetic abnormalities) in the DNA or mRNA encoding the receptor protein or its partial peptide of the present invention in, for example, damage, mutation or reduced expression of the DNA or mRNA, Alternatively, it is useful as a diagnostic agent for genes such as an increase in mRNA or overexpression.
- mammals eg, human, rat, mouse, egret, sheep, pig, pig, cat, dog, monkey, etc.
- the above-described genetic diagnosis using the DNA of the present invention includes, for example, known Northern hybridization and PCR-SSCP method (Genomics, Vol. 5, pp. 874-879 (1989); Proceedings of the National Academy of Sciences of the United States of America, Vol. 86, pp. 2766-2770 (1989)) Can be implemented.
- the DNA of the present invention can be used for screening a compound that changes the expression level of the receptor protein of the present invention or a partial peptide thereof.
- the present invention relates to, for example, (i) a non-human mammal's (2) blood, (2) a specific organ, (3) a tissue or cell isolated from an organ, or (ii) a transformant of the present invention.
- the measurement of the mRNA amount of the receptor protein of the present invention or its partial peptide is specifically performed as follows.
- non-human mammals for example, mice, rats, rabbits, higgs, bushus, rabbits, cats, dogs, monkeys, etc .; more specifically, dementia rats, obese mice, arteries, etc.
- Drugs eg, anti-dementia drugs, antihypertensive drugs, anti-cancer drugs, anti-obesity drugs, etc.
- physical stress eg, flooding stress, electric shock, light / dark, low temperature, etc.
- blood or a specific organ eg, adipose tissue, mammary gland, testis, etc.
- a tissue or cell isolated from the organ is obtained.
- the mRNA of the receptor protein of the present invention or its partial peptide contained in the obtained cells can be quantified by, for example, extracting mRNA from cells or the like by a usual method and using, for example, a technique such as TadManPCR. It can also be analyzed by performing Northern blots by known means.
- a transformant expressing the receptor protein of the present invention or its partial peptide is prepared according to the above method, and the mRNA of the receptor protein or its partial peptide of the present invention contained in the transformant is prepared. Can be quantified and analyzed in the same manner.
- Screening for a compound that alters the expression level of the receptor protein or its partial peptide of the present invention comprises:
- a given time before drug or physical stress is applied to a normal or disease model non-human mammal (30 minutes to 24 hours before, preferably 30 minutes to 12 hours before, Preferably 1 hour to 6 hours before) or after a certain time (30 minutes to 3 days, preferably 1 hour to 2 days, more preferably 1 hour to 24 hours), or drug or physical
- the test compound is administered at the same time as the target stress, and after a certain period of time after administration (30 minutes to 3 days, preferably 1 hour to 2 days, more preferably 1 hour to 24 hours), the cells (Ii) mixing the test compound in the culture medium when culturing the transformant according to a conventional method, and quantifying and analyzing the mRNA amount of the receptor protein of the present invention or its partial peptide contained in After culturing for a certain period of time (after 1 to 7 days, (After 1 to 3 days, more preferably after 2 to 3 days), by quantifying and analyzing the mRNA amount of the receptor protein of the present invention or its partial peptide contained in the transformant.
- the compound or a salt thereof obtained by using the screening method of the present invention is a compound having an action of changing the expression level of the receptor protein of the present invention or a partial peptide thereof.
- G protein-coupled receptor eg, arachidonic acid release, acetylcholine release, intracellular Ca 2+ release, intracellular c AMP production, intracellular c GMP production, inositol phosphate production, Compounds that enhance or inhibit cell membrane potential fluctuations, phosphorylation of intracellular proteins, activation of c-fos, and lowering of pH, etc.
- Examples of the compound include a peptide, a protein, a non-peptidic compound, a synthetic compound, a fermentation product, and the like. These compounds may be novel compounds or known compounds.
- the compound that enhances the cell stimulating activity is useful as a safe and low-toxic drug for enhancing the physiological activity of the receptor protein of the present invention or the like.
- the compound that attenuates the cell stimulating activity is useful as a safe and low-toxic drug for decreasing the physiological activity of the receptor protein of the present invention or the like.
- a compound or a salt thereof obtained by using the screening method of the present invention is used as a pharmaceutical composition, it can be carried out according to a conventional method.
- tablets, capsules, elixirs, microcapsules, sterile solutions, suspensions, and the like can be prepared in the same manner as the above-mentioned drug containing the receptor protein of the present invention.
- the preparations obtained in this way are safe and low toxic, so they can be used, for example, in mammals (eg, humans, rats, mice, puppies, sheep, bush, puppies, cats, cats, dogs, sal, etc.). Can be administered.
- mammals eg, humans, rats, mice, puppies, sheep, bush, puppies, cats, cats, dogs, sal, etc.
- the dose of the compound or a salt thereof varies depending on the administration subject, target organ, symptoms, administration method, and the like.
- oral administration in general, for example, in a cancer patient (as 60 kg), About 0.1 to 100 mg, preferably about 1.0 to 50 mg, more preferably about 1.0 to 20 mg per day.
- parenteral administration the single dose varies depending on the administration subject, target organ, symptoms, administration method, etc.
- injection it is usually used, for example, in cancer patients (as 60 kg).
- the dose can be administered in terms of 60 kg (5)
- the receptor protein of the present invention is considered to play some important role in vivo such as central function. Therefore, the compound that changes the expression level of the receptor protein or its partial peptide of the present invention can be used as a preventive and / or therapeutic agent for a disease associated with dysfunction of the receptor protein of the present invention.
- the compound when used as an agent for preventing and / or treating a disease associated with dysfunction of the receptor protein of the present invention, it can be formulated according to a conventional method.
- the compound can be used as a sugar-coated tablet, capsule, elixir, microcapsule or the like as needed, orally, or aseptic solution with water or another pharmaceutically acceptable liquid. It can be used parenterally or in the form of injections such as suspensions.
- the compound is mixed with known physiologically acceptable carriers, flavoring agents, excipients, vehicles, preservatives, stabilizers, binders, and the like in a unit dosage form generally required for the practice of pharmaceutical preparations. It can be manufactured by The amount of the active ingredient in these preparations is such that a suitable dosage in the specified range can be obtained.
- Additives that can be incorporated into tablets, capsules, etc. include, for example, binders such as gelatin, corn starch, tragacanth, gum arabic, excipients such as crystalline cellulose, corn starch, gelatin, alginic acid, etc. Swelling agents such as magnesium stearate, sweeteners such as sucrose, lactose or saccharin, and flavoring agents such as peppermint, cocoa oil or cherry.
- the unit dosage form is a capsule, the above type of material can further contain a liquid carrier such as an oil or fat.
- Sterile compositions for injection can be formulated according to standard pharmaceutical practice, such as dissolving or suspending the active substance in vehicles such as water for injection, and naturally occurring vegetable oils such as sesame oil and coconut oil. it can.
- Aqueous injection solutions include, for example, saline, isotonic solutions containing dextrose and other adjuvants (eg, D-sorbitol, D-mannitol, sodium chloride). Thorium, etc.), and suitable solubilizers, for example, alcohols (eg, ethanol), polyalcohols (eg, propylene glycol, polyethylene glycol), nonionic surfactants (eg, Polysorbate 80 TM, HCO) -50).
- the oily liquid for example, sesame oil, soybean oil and the like are used, and may be used in combination with solubilizers such as benzyl benzoate and benzyl alcohol.
- prophylactic and therapeutic agents include, for example, buffers (for example, phosphate buffer and sodium acetate buffer), soothing agents (for example, benzalkonium chloride, procaine hydrochloride, etc.), stabilizers (for example, human serum Albumin, polyethylene glycol, etc.), preservatives (eg, benzyl alcohol, phenol, etc.), antioxidants and the like.
- buffers for example, phosphate buffer and sodium acetate buffer
- soothing agents for example, benzalkonium chloride, procaine hydrochloride, etc.
- stabilizers for example, human serum Albumin, polyethylene glycol, etc.
- preservatives eg, benzyl alcohol, phenol, etc.
- antioxidants eg, benzyl alcohol, phenol, etc.
- the prepared injection solution is usually filled in a suitable ampoule.
- the preparations obtained in this way are safe and have low toxicity, so they can be used, for example, in mammals (eg, humans, rats,
- the dose of the compound or a salt thereof varies depending on the administration subject, target organ, symptoms, administration method, and the like. However, in the case of oral administration, for example, in a cancer patient (as 6 O kg), one dose is generally used. About 0.1 to 100 mg per day, preferably about 1.0 to 50 mg, more preferably about 1.0 to 20 mg. In the case of parenteral administration, the single dose varies depending on the administration target, target organ, symptoms, administration method, etc., for example, usually in the form of injection, for example, in cancer patients (60 kg). It is convenient to administer about 0.01 to 30 mg, preferably about 0.1 to 20 mg, more preferably about 0.1 to 1 Omg per day by intravenous injection. In the case of other animals, the amount converted per 60 kg can be administered.
- the quantification method of the present invention can be used, for example, in combination with a competition method. That is, the ligand concentration in the test sample can be measured by bringing the test sample into contact with the receptor protein of the present invention or the like. Specifically, for example, It can be used according to the method described in (1) or (2) below or a method analogous thereto.
- Such compounds via the G protein-coupled receptions evening single cell stimulating activity (e.g., Arakidon acid release, acetylcholine release, intracellular C a 2 + free, intracellular c AM P product, Compounds that have intracellular c GMP production, inositol monophosphate production, cell membrane potential fluctuations, intracellular protein phosphorylation, activation of c-fos, activity to suppress or reduce pH, etc.) (A so-called agonist against the receptor protein of the present invention), (mouth) a compound having no cell stimulating activity (a so-called antagonist against the receptor protein of the present invention), (c) coupling of the ligand with the G protein of the present invention Or a compound that (2) decreases the binding force between the ligand and the G protein-coupled receptor protein of the present invention.
- the compound of the above (I) is preferably screened by the ligand determination methods described above).
- the present invention relates to (i) the case where the receptor protein of the present invention or its partial peptide or a salt thereof is brought into contact with a ligand; and (ii) the receptor protein of the present invention or its partial peptide or a salt thereof. And a compound which alters the binding property between the ligand and the receptor protein of the present invention or its partial peptide or a salt thereof, which is characterized by comparing the ligand and the test compound with the receptor or the test compound. A method for screening the salt is provided.
- the amount of ligand binding to the receptor protein or the like, the cell stimulating activity, and the like are measured and compared.
- the present invention provides
- the receptor protein of the labeled ligand is obtained.
- a compound that activates the receptor protein or the like of the present invention eg, a ligand for the receptor protein or the like of the present invention
- a cell containing the receptor protein or the like of the present invention e.g, arachidonic acid release
- a cell stimulating activity via receptor receptor eg, arachidonic acid release
- a compound that activates receptor protein or the like and a test compound are brought into contact with cells containing the receptor receptor protein of the present invention.
- a compound that activates the receptor protein of the present invention eg, a ligand for the receptor protein of the present invention
- a compound that activates the receptor protein of the present invention is expressed on a cell membrane by culturing a transformant containing the DNA of the present invention.
- the compound that activates the receptor protein or the like of the present invention and the test compound are expressed on the cell membrane by culturing a transformant containing the DNA of the present invention when the receptor is contacted with the receptor protein or the like of the present invention.
- receptions evening scratch intervention of that cell stimulating activity e.g., Arakidon acid release, acetylcholine release, intracellular C a 2 + release, intracellular C AM P generated Activity or inhibition of promoting c GMP production, inositol phosphate production, cell membrane potential fluctuation, intracellular protein phosphorylation, activation of c_; fos, decrease of pH, etc.
- cell stimulating activity e.g., Arakidon acid release, acetylcholine release, intracellular C a 2 + release, intracellular C AM P generated Activity or inhibition of promoting c GMP production, inositol phosphate production, cell membrane potential fluctuation, intracellular protein phosphorylation, activation of c_; fos, decrease of pH, etc.
- the activity, etc. that is measured, a compound that alters the binding property between the receptions evening one protein of the ligand with the present invention characterized by comparing or provides a screening method of a salt thereof.
- a cell, tissue or cell membrane containing the G protein-coupled receptor receptor protein such as a rat is used. (Primary screening), and then a test to confirm whether the candidate compound actually inhibits the binding between human G protein-coupled receptor protein and ligand (secondary screening) was needed. If the cell, tissue or cell membrane fraction is used as it is, other receptor proteins are also mixed, so it was difficult to actually screen for an agonist or an angist for the target receptor protein.
- the use of the human-derived receptor protein of the present invention eliminates the need for primary screening, and makes it possible to efficiently screen for a compound that inhibits the binding between a ligand and a G protein-coupled receptor protein. it can. Furthermore, it is possible to easily evaluate whether the screened compound is an agonist or an antagonist.
- the receptor protein of the present invention and the like used in the screening method of the present invention may be any as long as it contains the above-described receptor protein of the present invention.
- a cell membrane fraction of a mammalian organ containing the receptor protein of the present invention or the like is preferred.
- human-derived receptor proteins and the like that are expressed in large amounts using recombinants are suitable for screening.
- the method described above is used for producing the receptor protein of the present invention and the like, but it is preferably carried out by expressing the DNA of the present invention in mammalian cells and insect cells.
- Complementary DNA is used for the DNA fragment encoding the protein portion of interest, but is not necessarily limited to this.
- a gene fragment or a synthetic DNA may be used.
- the DNA fragment should be a nucleoside belonging to a baculovirus using an insect as a host.
- Somatic disease virus nuclear polyhedrosis virus; NPV
- NPV nuclear polyhedrosis virus
- SV40-derived promoter SV40-derived promoter
- retrovirus promoter meta-oral thionein promoter
- human human shock promoter cytomegalovirus promoter
- cytomegalovirus promoter Somatic disease virus (nuclear polyhedrosis virus; NPV) polyhedrin promoter
- SV40-derived promoter SV40-derived promoter
- retrovirus promoter retrovirus promoter
- meta-oral thionein promoter human human shock promoter
- cytomegalovirus promoter cytomegalovirus promoter
- the protein containing the receptor protein or the like of the present invention may be a receptor protein or the like purified according to a known method, or a cell containing the receptor protein or the like.
- a membrane fraction of cells containing the receptor protein or the like may be used.
- the cell when a cell containing the receptor protein of the present invention or the like is used, the cell may be immobilized with daltaraldehyde, formalin, or the like.
- the immobilization method can be performed according to a known method.
- Cells containing the receptor protein or the like of the present invention include host cells that express the receptor protein and the like.
- Examples of the host cells include Escherichia coli, Bacillus subtilis, yeast, and kelp. Insect cells and animal cells are preferred.
- the cell membrane fraction refers to a cell membrane-rich fraction obtained by disrupting cells and then obtained by a known method.
- the cells can be crushed by crushing the cells with a Potter-Elvehjein homogenizer, crushing with a Warlinda blender ⁇ Polytron (Kinematica), crushing by ultrasonic waves, or pressurizing with a French press. Crushing by ejecting cells from a thin nozzle.
- a fractionation method by centrifugal force such as a fractionation centrifugation method or a density gradient centrifugation method is mainly used.
- the cell lysate is centrifuged at a low speed (500 rpm to 300 rpm) for a short time (usually about 1 to 10 minutes), and the supernatant is further centrifuged at a high speed (150 rpm to 3 The mixture is centrifuged usually at 0.000 rpm) for 30 minutes to 2 hours, and the resulting precipitate is used as a membrane fraction.
- the membrane fraction is rich in the expressed receptor protein and other membrane components such as cell-derived phospholipids and membrane proteins.
- a suitable receptor protein fraction and a labeled ligand are required. It is.
- the receptor protein fraction is preferably a natural receptor protein fraction or a recombinant receptor protein fraction having the same activity as the protein fraction.
- “equivalent activity” means equivalent ligand binding activity, signal information transduction action, etc.
- a labeled ligand, a labeled ligand analog compound or the like is used as the labeled ligand. For example [3 H], [1 2 5 I], + [1 4 C], and the ligand is labeled with a [3 5 S] used.
- the compound containing the receptor protein of the present invention must be contained.
- the receptor protein preparation is prepared by suspending the cells or the membrane fraction of the cells to be washed in a buffer suitable for screening. Any buffer may be used as long as it does not inhibit the binding between the ligand and the receptor protein, such as a phosphate buffer having a pH of 4 to 10 (preferably pH 6 to 8) and a buffer of Tris monohydrochloride.
- a buffer having a pH of 4 to 10 (preferably pH 6 to 8) and a buffer of Tris monohydrochloride.
- surfactants such as CHAPS, Teen-80 TM (Kaoichi Atlas), digitonin and dexcholate can be added to the buffer for the purpose of reducing non-specific binding.
- protease inhibitors such as PMS F, leptin, E-64 (manufactured by Peptide Research Laboratories), and peptide suptin can be added for the purpose of suppressing receptor degradation and degradation of the ligand by proteases.
- 0. to 0 lm 1 to 10 m 1 of the receptor solution was added labeled ligand a certain amount (5000 c pm ⁇ 500000 c pm), the coexistence of test compound 10- 4 M ⁇ 10- 1Q M simultaneously.
- the reaction is carried out at about 0 ° C to 50 ° C, preferably about 4 ° C to 37 ° C, for about 20 minutes to 24 hours, preferably for about 30 minutes to 3 hours.
- the mixture is filtered through a glass fiber filter or the like, washed with an appropriate amount of the same buffer, and the radioactivity remaining on the glass fiber filter is measured using a liquid scintillation counter or an arc counter.
- the specific binding amount (B—NSB) is For example, a test compound having a concentration of 50% or less can be selected as a candidate substance capable of competitive inhibition. '
- a cell stimulating activity through the receptor protein for example, arachidonic acid release, acetylcholine release, intracellular Ca 2+ release, intracellular cAMP production, intracellular cGMP production, inositol phosphatase production, cell membrane potential fluctuation, intracellular protein phosphorylation, c-fos Activation, activity to promote or suppress pH reduction, etc.
- a cell stimulating activity through the receptor protein for example, arachidonic acid release, acetylcholine release, intracellular Ca 2+ release, intracellular cAMP production, intracellular cGMP production, inositol phosphatase production, cell membrane potential fluctuation, intracellular protein phosphorylation, c-fos Activation, activity to promote or suppress pH reduction, etc.
- cells containing the receptor protein of the present invention and the like are cultured on a multi-well plate or the like. Fresh in advance of screening Replace with a suitable buffer that is not toxic to the medium or cells, add test compounds, etc., incubate for a certain period of time, extract the cells or collect the supernatant, and quantitate the resulting product according to each method . If the production of a substance (for example, arachidonic acid) as an indicator of the cell stimulating activity is difficult to be assayed by a degrading enzyme contained in cells, an inhibitor for the degrading enzyme is added to perform the assay. Is also good. In addition, activities such as cAMP production suppression can be detected as a production suppression effect on cells whose basal production has been increased by forskolin or the like.
- a substance for example, arachidonic acid
- cells expressing an appropriate receptor protein are required.
- a cell expressing the receptor protein of the present invention a cell line having the natural receptor protein of the present invention, a cell line expressing the above-mentioned recombinant receptor protein or the like is desirable.
- test compounds for example, peptides, proteins, non-peptidic compounds, synthetic compounds, fermentation products, cell extracts, plant extracts, animal tissue extracts, etc. are used, and these compounds are novel compounds. Or a known compound.
- screening kit of the present invention examples include the following. 1. Screening reagent
- the C HO cells expressing receptions evening one protein of the present invention in one two-hole play passaged me at 5 X 1 0 5 cells / well, 3 7 ° C, 5% CO Q, 9 5% air Cultured for 2 days of.
- CH 2 cells expressing the receptor protein of the present invention cultured on a 12-well tissue culture plate are washed twice with 1 ml of a measurement buffer, and then 490 ⁇ 1 measurement buffer is added to each well.
- the compound or a salt thereof obtained by using the screening method or the screening kit of the present invention is a compound having an action of changing the binding property between a ligand and the receptor protein of the present invention, and specifically, (A) Cell stimulating activity (eg, arachidonic acid release, acetylcholine release, Intracellular Ca 2+ release, Intracellular cAMP generation, Intracellular cGMP generation, Inositol phosphate production, Cell membrane potential fluctuation, Intracellular protein phosphorylation, Activation of c-fos, pH A compound having an activity of promoting or suppressing a decrease (such as an agonist against the receptor protein of the present invention); and (mouth) a compound having no such cell stimulating activity (so-called a receptor protein of the present invention).
- A Cell stimulating activity
- a compound having an activity of promoting or suppressing a decrease such as an agonist against the receptor protein of the present invention
- a compound having no such cell stimulating activity such as an agonist against the receptor protein of the present invention
- Antagonist (h) Compound that enhances the binding strength between ligand and G protein-coupled receptor protein of the present invention, or (2) Binding force between ligand and G protein-coupled receptor protein of the present invention Is a compound that reduces
- Examples of the compound include a peptide, a protein, a non-peptidic compound, a synthetic compound, a fermentation product, and the like. These compounds may be novel compounds or known compounds.
- the agonist against the receptor protein and the like of the present invention has the same activity as the physiological activity of the ligand for the receptor protein and the like of the present invention, so that it is a safe and low toxic drug depending on the ligand activity. Useful.
- the antagonist of the present invention for the receptor protein or the like of the present invention can suppress the physiological activity of the ligand for the receptor protein or the like of the present invention, it is useful as a safe and low-toxic drug for suppressing the ligand activity. is there.
- the compound that enhances the binding force between the ligand and the G protein-coupled receptor protein of the present invention is a safe and low-toxic drug for enhancing the physiological activity of the ligand for the receptor protein of the present invention and the like.
- the compound that decreases the binding force between the ligand and the G protein-coupled receptor protein of the present invention is useful as a safe and low-toxic drug for reducing the physiological activity of the ligand for the receptor protein of the present invention or the like. is there.
- a compound or a salt thereof obtained by using the screening method or the screening kit of the present invention is used as the above-mentioned pharmaceutical composition, it can be carried out in a conventional manner.
- tablets, capsules, elixirs, microcapsules, sterile solutions, suspensions, and the like can be prepared in the same manner as the above-mentioned drug containing the receptor protein of the present invention.
- the preparations obtained in this way are safe and have low toxicity, so For example, it can be administered to humans, rats, mice, egrets, sheep, sheep, bush, horses, cats, dogs, sal, etc.).
- the dose of the compound or a salt thereof varies depending on the administration subject, target organ, condition, administration method, and the like.
- oral administration for example, in a cancer patient (assuming 60 kg), one dose is required.
- parenteral administration the single dose varies depending on the administration target, target organ, symptoms, administration method, etc.
- injection it is usually used, for example, in cancer patients (as 6 O kg)
- the amount converted per 60 kg can be administered.
- a preventive and / or therapeutic agent for various diseases containing a compound (agonist, angonist) which changes the binding property between the G protein-coupled receptor protein of the present invention and a ligand.
- the receptor protein of the present invention is considered to play some important roles in vivo, such as central functions, circulatory functions, and digestive functions. Therefore, compounds (agonists, antagonists) that alter the binding between the receptor protein and the ligand of the present invention and ligands for the receptor protein of the present invention can be used to prevent diseases associated with dysfunction of the receptor protein of the present invention. And z or as a therapeutic agent.
- the compound or ligand when used as a prophylactic and / or therapeutic agent for a disease associated with dysfunction of the receptor protein of the present invention, it can be formulated according to conventional means.
- the compound or ligand can be sterilized with tablets or capsules, elixirs, microcapsules, etc., as required, which are sugar-coated, or with water or other pharmaceutically acceptable liquids. It can be used parenterally in the form of injections such as solutions or suspensions.
- the compound is mixed with known physiologically acceptable carriers, flavoring agents, excipients, vehicles, preservatives, stabilizers, binders, and the like in a unit dosage form generally required for the practice of pharmaceutical preparations. Manufacture by be able to. The amount of the active ingredient in these preparations is such that a suitable dosage in the specified range can be obtained.
- the unit dosage form is a capsule, the above type of material can further contain a liquid carrier such as an oil or fat.
- Sterile compositions for injection can be formulated according to standard pharmaceutical practice, such as dissolving or suspending the active substance in vehicles such as water for injection, and naturally occurring vegetable oils such as sesame oil and coconut oil. it can.
- aqueous solution for injection for example, physiological saline, isotonic night containing glucose and other adjuvants (for example, D-sorbitol, D-mannitol, sodium chloride, etc.) and the like are used.
- Agents such as alcohols (eg, ethanol), polyalcohols (eg, propylene glycol, polyethylene glycol), nonionic surfactants (eg, Polysorbate 80 TM, HCO-50) You may use together.
- the oily liquid for example, sesame oil, soybean oil and the like are used, and may be used in combination with solubilizers such as benzyl benzoate and benzyl alcohol.
- prophylactic and therapeutic agents examples include, for example, buffers (for example, phosphate buffer and sodium acetate buffer), soothing agents (for example, benzalkonium chloride, procaine hydrochloride, etc.), stabilizers (for example, human serum Albumin, polyethylene glycol, etc.), preservatives (eg, benzyl alcohol, phenol, etc.), antioxidants and the like.
- buffers for example, phosphate buffer and sodium acetate buffer
- soothing agents for example, benzalkonium chloride, procaine hydrochloride, etc.
- stabilizers for example, human serum Albumin, polyethylene glycol, etc.
- preservatives eg, benzyl alcohol, phenol, etc.
- antioxidants antioxidants and the like.
- the prepared injection solution is usually filled in a suitable ampoule.
- the above-mentioned prophylactic / therapeutic agent can be used in combination with an appropriate drug, for example, as a DDS preparation specifically targeting an organ or tissue in which the
- the preparations obtained in this way are safe and have low toxicity, and are useful, for example, in mammals (eg, humans, rats, mice, puppies, sheep, pigs, puppies, cats, dogs, puppies). For example).
- the dose of the compound or a salt thereof varies depending on the administration subject, target organ, symptom, administration method, and the like.
- oral administration for example, in a patient with cancer (as 60 kg), the daily About 0.1 to 100 mg, preferably about 1.0 to 50 mg, more preferably about 1.0 to 2 Omg.
- parenteral administration the single dose varies depending on the administration subject, target organ, symptoms, administration method, etc.
- ⁇ in a patient (as 6 O kg).
- the dose can be administered in terms of 60 kg.
- the antibody of the present invention can specifically recognize the receptor protein of the present invention and the like. It can be used for quantification of receptor protein, especially for quantification by sandwich immunoassay. That is, the present invention provides, for example,
- one antibody is an antibody that recognizes the N-terminal of the receptor protein of the present invention or the like, and the other antibody is an antibody that reacts with the C-terminal of the receptor protein or the like of the present invention.
- the other antibody is an antibody that reacts with the C-terminal of the receptor protein or the like of the present invention.
- the monoclonal antibody of the present invention In addition to measuring the receptor protein of the present invention using a monoclonal antibody against the receptor protein of the present invention (hereinafter sometimes referred to as the monoclonal antibody of the present invention), detection by tissue staining or the like can be performed. You can do it.
- the antibody molecule itself may be used, and F (ab ') 2 , F Ab 'or the Fab fraction may be used.
- the measurement method using an antibody against the receptor protein of the present invention is not particularly limited, and may be an antibody, antigen or antibody corresponding to the antigen amount (for example, the amount of receptor protein) in the test solution.
- Any method can be used to detect the amount of one antigen complex by chemical or physical means and calculate this from a standard curve prepared using a standard solution containing a known amount of antigen. Is also good. For example, it is particularly preferable to use the San Germanti method described later in terms of sensitivity and specificity in which nephrometry, a competitive method, an immunometric method, and a sandwich method are suitably used.
- a labeling agent used in a measuring method using a labeling substance for example, a radioisotope, an enzyme, a fluorescent substance, a luminescent substance and the like are used. Radioisotopes, if example embodiment, [1 2 5 I], [1 3 1 I], [3 H], and [1 4 C] used.
- a stable enzyme having a large specific activity is preferable. For example, j8-galactosidase, / 3-dalcosidase, alkaline phosphatase, peroxidase, and lignoic acid dehydrogenase are used.
- fluorescent substance for example, fluorescein, fluorescein isothiosinate and the like are used.
- luminescent substance for example, luminol, luminol derivative, luciferin, lucigenin and the like are used.
- a biotin-avidin system can be used for binding the antibody or antigen to the labeling agent.
- insolubilization of the antigen or antibody physical adsorption may be used, or a method using a chemical bond usually used for insolubilizing and immobilizing proteins or enzymes may be used.
- the carrier for example, insoluble polysaccharides such as agarose, dextran, and cellulose, synthetic resins such as polystyrene, polyacrylamide, and silicon, and glass are used.
- the test solution is reacted with the insolubilized monoclonal antibody of the present invention (primary reaction), and further reacted with the labeled monoclonal antibody of the present invention (secondary reaction).
- primary reaction By measuring the activity of the agent, the amount of the receptor protein of the present invention in the test solution can be determined.
- the primary reaction and the secondary reaction may be performed in the reverse order, may be performed simultaneously, or may be performed at staggered times.
- the labeling agent and the method of insolubilization can be in accordance with those described above.
- the antibody used for the solid phase antibody or the labeling antibody is not necessarily one kind, and a mixture of two or more kinds of antibodies is used for the purpose of improving measurement sensitivity and the like. May be used.
- the monoclonal antibody of the present invention used in the primary reaction and the secondary reaction is preferably an antibody having different binding sites to the receptor protein and the like. That is, the antibody used in the primary reaction and the secondary reaction is, for example, when the antibody used in the secondary reaction recognizes the C-terminal of the receptor protein, the antibody used in the primary reaction is Preferably, an antibody that recognizes other than the C-terminal, for example, the N-terminal, is used.
- the monoclonal antibody of the present invention can be used in a measurement system other than the sandwich method, for example, a competition method, an immunometric method, or a nephrometry.
- competition method after the antigen in the test solution and the labeled antigen are allowed to react competitively with the antibody, the unreacted labeled antigen is separated from (F) and the labeled antigen (B) bound to the antibody.
- BZF separation Measure the amount of any of B and F, and quantify the amount of antigen in the test solution.
- a soluble antibody is used as an antibody
- BZF separation is carried out using polyethylene glycol
- a liquid phase method using a second antibody against the above antibody or an immobilized antibody is used as the first antibody.
- An immobilization method using a soluble antibody as the first antibody and using an immobilized antibody as the second antibody is used.
- the antigen in the test solution and the immobilized antigen are subjected to a competitive reaction with a certain amount of labeled antibody, and then the solid phase and the liquid phase are separated. After reacting the antigen with an excess amount of the labeled antibody, the immobilized antigen is added to bind the unreacted labeled antibody to the solid phase, and then the solid phase and the liquid phase are separated. Next, the amount of label in either phase is measured to determine the amount of antigen in the test solution.
- nephrometry the amount of insoluble sediment generated as a result of an antigen-antibody reaction in a gel or in a solution is measured. Even when the amount of antigen in the test solution is small and only a small amount of sediment is obtained, laser nephrometry utilizing laser scattering is preferably used.
- the receptor protein of the present invention or a salt thereof can be quantified with high sensitivity.
- the antibody of the present invention can be used for specifically detecting the receptor protein of the present invention present in a subject such as a body fluid or a tissue. Further, preparation of an antibody column used for purifying the receptor protein of the present invention, detection of the receptor protein of the present invention in each fraction at the time of purification, and behavior of the receptor protein of the present invention in test cells It can be used for analysis and the like.
- the antibody of the present invention can specifically recognize the receptor protein of the present invention or its partial peptide or a salt thereof, the receptor of the present invention in a cell membrane can be used.
- a cell membrane fraction is isolated, and the receptor of the present invention contained in the cell membrane fraction is isolated.
- the cell membrane fraction is isolated, and the receptor protein of the present invention or its partial peptide contained in the cell membrane fraction A method for screening a compound that changes the amount of the receptor protein of the present invention or a partial peptide thereof in a cell membrane,
- Sections of (1) blood, (2) specific organs, and (3) tissues or cells isolated from organs of non-human mammals, and then using immunostaining to obtain the receptor at the cell surface A method for screening a compound that changes the amount of the receptor protein of the present invention or its partial peptide in a cell membrane by confirming the protein on the cell membrane by quantifying the degree of staining of the protein.
- the present invention provides a method for screening a compound that changes the amount of the receptor protein of the present invention or its partial peptide in the cell membrane by confirming the protein on the cell membrane.
- the amount of the receptor protein of the present invention or its partial peptide contained in the cell membrane fraction is specifically determined as follows.
- non-human mammals e.g., mice, rats, rabbits, sheep, sheep, dogs, cats, cats, dogs, monkeys, etc., more specifically, dementia rats, obese mice, arteriosclerosis
- a drug e.g, an anti-dementia drug, a blood pressure lowering drug, an anti-cancer drug, an anti-obesity drug, etc.
- Blood or specific organs (eg, adipose tissue, mammary gland, testis, etc.), or tissues isolated from organs after a certain period of time Or obtain cells.
- the obtained organ, tissue or cell is suspended in, for example, an appropriate buffer (for example, Tris-HCl buffer, phosphate buffer, Hess buffer, etc.) to destroy the organ, tissue or cell
- an appropriate buffer for example, Tris-HCl buffer, phosphate buffer, Hess buffer, etc.
- a cell membrane fraction is obtained by using a surfactant (for example, Triton X-100 TM , Tween20 TM, etc.) and further using a method such as centrifugation, filtration, or column fractionation.
- a surfactant for example, Triton X-100 TM , Tween20 TM, etc.
- the cell membrane fraction refers to a cell membrane-rich fraction obtained by disrupting cells and then obtained by a known method.
- the cells can be crushed by crushing the cells with a Potter-Elvehjem homogenizer, crushing with a ring blender or a polytron (Kinema Uca), crushing with an ultrasonic wave, pressing the cells while pressing with a French press, etc. Crushing by ejecting from a thin nozzle is exemplified.
- a fractionation method by centrifugal force such as a fractionation centrifugation method or a density gradient centrifugation method is mainly used.
- the cell lysate is centrifuged at a low speed (500 rpm to 3000 rpm) for a short time (typically about 1 to 10 minutes), and the supernatant is further centrifuged at a higher speed (15000 to 30000 rpm) for 30 minutes to 2 hours.
- the resulting precipitate is used as a membrane fraction.
- the membrane fraction is rich in the expressed receptor protein and other membrane components such as cell-derived phospholipids and membrane proteins.
- the receptor protein of the present invention or its partial peptide contained in the cell membrane fraction can be quantified by, for example, sandwich immunoassay using the antibody of the present invention, Western blot analysis, or the like.
- Such a sandwich immunoassay can be performed in the same manner as described above, and the Western plot can be performed by known means.
- a transformant expressing the receptor protein of the present invention or its partial peptide is prepared according to the above method, and the receptor protein of the present invention or its partial peptide contained in the cell membrane fraction can be quantified.
- Screening for a compound that changes the amount of the receptor protein of the present invention or its partial peptide in the cell membrane is performed by:
- test compound When culturing the transformant according to a conventional method, the test compound is mixed in a medium, and after culturing for a certain period of time (1 day to 7 days, preferably 1 day to 3 days, more preferably 2 days to 3 days) (After day), by quantifying the amount of the receptor protein of the present invention or its partial peptide in the cell membrane.
- the confirmation of the receptor protein of the present invention or its partial peptide contained in the cell membrane fraction is specifically performed as follows.
- non-human mammals e.g., mice, rats, egrets, sheep, higgs, bushus, horses, cats, dogs, monkeys, etc .; more specifically, dementia rats, obese mice, atherosclerosis
- Drugs eg, anti-dementia drugs, anti-hypertensive drugs, anti-cancer drugs, anti-obesity drugs, etc.
- physical stress e.g, flooding stress, electric shock, light / dark, low temperature, etc.
- blood or a specific organ eg, adipose tissue, mammary gland, testis, etc.
- a tissue or cell isolated from the organ is obtained.
- the obtained organ, tissue or cell is cut into a tissue section according to a conventional method, and immunostained using the antibody of the present invention.
- the receptor protein of the present invention or its portion on the cell membrane can be quantitatively or qualitatively determined.
- the amount of the peptide can be confirmed.
- the compound or a salt thereof obtained by using the screening method of the present invention is a compound having an effect of changing the amount of the receptor protein of the present invention or a partial peptide thereof in a cell membrane.
- the reception of the present invention By increasing the amount of one protein or its partial peptide, cell stimulating activity via G protein-coupled receptor (eg, arachidonic acid release, acetylcholine release, intracellular Ca 2+ release, intracellular cAMP generation, Compounds that enhance or inhibit cGMP production, inositol phosphate production, cell membrane potential fluctuations, intracellular protein phosphorylation, activation of c-fos, pH reduction, etc. Mouth) A compound that reduces the cell stimulating activity by reducing the amount of the receptor protein of the present invention or its partial peptide in the cell membrane.
- G protein-coupled receptor eg, arachidonic acid release, acetylcholine release, intracellular Ca 2+ release, intracellular cAMP generation, Compounds that enhance or inhibit
- Examples of the compound include a peptide, a protein, a non-peptidic compound, a synthetic compound, a fermentation product, and the like. These compounds may be novel compounds or known compounds.
- the compound that enhances the cell stimulating activity is useful as a safe and low-toxic drug for enhancing the physiological activity of the receptor protein of the present invention or the like.
- the compound that attenuates the cell stimulating activity is useful as a safe and low-toxic drug for decreasing the physiological activity of the receptor protein of the present invention or the like.
- a compound or a salt thereof obtained by using the screening method of the present invention is used as a pharmaceutical composition, it can be carried out according to a conventional method.
- tablets, capsules, elixirs, microcapsules, sterile solutions, suspensions, and the like can be prepared in the same manner as the above-mentioned drug containing the receptor protein of the present invention.
- the preparations obtained in this way are safe and have low toxicity, so they can be used, for example, in mammals (eg, humans, rats, mice, puppies, sheep, pigs, puppies, cats, dogs, dogs, etc.). Can be administered.
- mammals eg, humans, rats, mice, puppies, sheep, pigs, puppies, cats, dogs, dogs, etc.
- the dose of the compound or a salt thereof varies depending on the administration subject, target organ, symptoms, administration method, and the like. However, in the case of oral administration, for example, in a cancer patient (as 6 O kg), one dose is generally used. About 0.1 to per day: L0 Omg, preferably about 1.0 to 50 mg, more preferably about 1.0 to 2 Omg. In the case of parenteral administration, the single dose varies depending on the administration target, target organ, symptoms, administration method, etc. For example, in the case of injection, it is usually used, for example, in cancer patients (as 6 O kg). Is about 0.01 to 3 Omg per day, preferably about 0.1 to 20 mg, More preferably, about 0.1 to 1 Omg is administered by intravenous injection. In the case of other animals, the dose can be administered in terms of 60 kg.
- a preventive and / or therapeutic agent for various diseases containing a compound that changes the amount of the receptor protein of the present invention or its partial peptide in the cell membrane
- the receptor protein of the present invention is considered to play some important role in vivo such as central function. Therefore, a compound that alters the amount of the receptor protein of the present invention or its partial peptide in the cell membrane can be used as an agent for preventing and / or treating a disease associated with dysfunction of the receptor protein of the present invention.
- the compound is used for preventing a disease associated with dysfunction of the receptor protein of the present invention and
- the compound can be used as a tablet, capsule, elixir, microcapsule, etc., if necessary, orally, or aseptic solution with water or any other pharmaceutically acceptable liquid. It can be used parenterally or in the form of injections such as suspensions.
- the compound is mixed with known physiologically acceptable carriers, flavoring agents, excipients, vehicles, preservatives, stabilizers, binders, and the like in a unit dosage form generally required for the practice of pharmaceutical preparations. It can be manufactured by The amount of the active ingredient in these preparations is such that a suitable dosage in the specified range can be obtained.
- Additives that can be incorporated into tablets, capsules, etc. include, for example, binders such as gelatin, corn starch, tragacanth, gum arabic, excipients such as crystalline cellulose, corn starch, gelatin, alginic acid, etc. Swelling agents such as magnesium stearate, sweeteners such as sucrose, lactose or saccharin, and flavoring agents such as peppermint, cocoa oil or cellulose.
- the unit dosage form is a capsule, the above type of material can further contain a liquid carrier such as an oil or fat.
- Sterile compositions for injection are formulated according to normal pharmaceutical practice, such as by dissolving or suspending the active substance in a vehicle, such as water for injection, or naturally occurring vegetable oils such as sesame oil and coconut oil.
- a vehicle such as water for injection, or naturally occurring vegetable oils such as sesame oil and coconut oil.
- aqueous liquid for injection include physiological saline, isotonic solution containing glucose and other adjuvants (eg, D-sorbitol, D-mannitol, sodium chloride, etc.) and the like.
- Agents such as alcohols (eg, ethanol), polyalcohols (eg, propylene glycol, polyethylene daricol), nonionic surfactants (eg, Polysorbate 80 TM, HCO-50) Good.
- the oily liquid for example, sesame oil, soybean oil and the like are used, and may be used in combination with solubilizers such as benzyl benzoate and benzyl alcohol.
- prophylactic and therapeutic agents examples include, for example, buffers (for example, phosphate buffer and sodium acetate buffer), soothing agents (for example, benzalkonium chloride, procaine hydrochloride, etc.), stabilizers (for example, human serum Albumin, polyethylene glycol, etc.), preservatives (eg, benzyl alcohol, phenol, etc.), antioxidants and the like.
- buffers for example, phosphate buffer and sodium acetate buffer
- soothing agents for example, benzalkonium chloride, procaine hydrochloride, etc.
- stabilizers for example, human serum Albumin, polyethylene glycol, etc.
- preservatives eg, benzyl alcohol, phenol, etc.
- antioxidants antioxidants and the like.
- the prepared injection solution is usually filled in a suitable ampoule.
- the preparations obtained in this way are safe and low toxic, so they can be used, for example, in mammals (eg, humans, rats, mice, puppies, sheep, bush, puppies,
- the dose of the compound or a salt thereof varies depending on the administration subject, target organ, symptom, administration method, and the like.
- oral administration for example, in a patient with cancer (as 60 kg)
- parenteral administration the single dose varies depending on the administration target, target organ, symptoms, administration method, etc.
- injection it is usually used, for example, in cancer patients (as 6 O kg).
- the dose can be administered in terms of 60 kg.
- the neutralizing activity of an antibody against the receptor protein of the present invention or its partial peptide or a salt thereof against the receptor protein or the like means that the receptor Refers to an activity that inactivates a signaling function involving a protein. Therefore, when the antibody has a neutralizing activity, signal transmission involving the receptor protein, for example, cell stimulating activity via the receptor protein (eg, arachidonic acid release, acetylcholine release, intracellular Ca) 2+ release, promotes intracellular cAMP production, intracellular cGMP production, inositol phosphate production, fluctuations in cell membrane potential, phosphorylation of intracellular proteins, activation of c-fos, decrease in pH, etc. Activity or inhibitory activity). Therefore, it can be used for prevention and Z or treatment of diseases caused by excessive expression of the receptor protein.
- cell stimulating activity via the receptor protein eg, arachidonic acid release, acetylcholine release, intracellular Ca
- intracellular cAMP production eg, arachidonic acid release,
- transgenic animal that expresses the receptor protein of the present invention or the like can be prepared.
- animals include mammals (for example, rats, mice, egrets, sheep, pigeons, pigs, cats, dogs, monkeys, etc.) (hereinafter sometimes abbreviated as animals).
- mammals for example, rats, mice, egrets, sheep, pigeons, pigs, cats, dogs, monkeys, etc.
- animals for example, rats, mice, egrets, sheep, pigeons, pigs, cats, dogs, monkeys, etc.
- mice egrets and the like are preferred.
- the DNA of the present invention In transferring the DNA of the present invention to a target animal, it is generally advantageous to use the DNA as a gene construct linked downstream of a promoter capable of being expressed in animal cells.
- a DNA-transferred animal that highly produces the receptor protein of the present invention can be produced.
- a virus-derived promoter a ubiquitous expression promoter such as metamouth thionein, etc. may be used, and preferably, an NGF gene promoter or an enolase gene promoter which is specifically expressed in the brain are used. Used.
- Transfer of the DNA of the present invention at the fertilized egg cell stage is ensured to be present in all germ cells and somatic cells of the target animal.
- the presence of the receptor protein or the like of the present invention in the germ cells of the produced animal after DNA transfer means that all the offspring of the produced animal have the receptor protein of the present invention in all of the germ cells and somatic cells. means.
- the progeny of this type of animal that has inherited the gene have the receptor protein of the present invention in all of its germinal and somatic cells.
- the DNA-transferred animal of the present invention After confirming that the DNA-transferred animal of the present invention stably retains the gene by mating, it can be reared in a normal breeding environment as the DNA-bearing animal. Furthermore, by crossing male and female animals having the target DNA, homozygous animals having the transgene on both homologous chromosomes are obtained, and by crossing the male and female animals, all the offspring are Breeding passages can be made to have NA.
- the animal to which the DNA of the present invention has been transferred expresses the receptor protein of the present invention at a high level. Useful as
- the DNA transgenic animal of the present invention can also be used as a cell source for tissue culture.
- tissue culture For example, by directly analyzing DNA or RNA in the tissue of the DNA-transferred mouse of the present invention, or by analyzing the tissue in which the receptor protein of the present invention expressed by a gene is present, the present invention can be performed. Analyzes can be made for the receptor protein.
- the cells of a tissue having the receptor protein of the present invention or the like are cultured by standard tissue culture techniques, and these are used to obtain cells from tissues that are generally difficult to culture, such as those derived from brain or peripheral tissues. Function can be studied. In addition, by using the cells, for example, it is possible to select a drug that enhances the function of various tissues. In addition, if there is a high expression cell line, the receptor protein of the present invention can be isolated and purified therefrom.
- bases, amino acids, and the like are indicated by abbreviations based on the abbreviations of IUPAC-IBB Codition on Biochemical Nomenclature or commonly used abbreviations in the art, and examples thereof are described below.
- the L-form is indicated unless otherwise specified.
- RNA Messenger liponucleic acid dATP Deoxyadenosine triphosphate dTTP Deoxythymidine triphosphate dGTP Deoxyguanosine triphosphate dCTP Deoxycytidine triphosphate ATP Adenosine triphosphate
- HONB 1-Hydroxy-5-norporene-2,3-dicarpoxyimide DCC
- FIG. 1 shows the amino acid sequence of a novel human-derived G protein-coupled receptor protein TGR13 of the present invention.
- FIG. 1 shows the nucleotide sequence of cDNA encoding the novel human-derived G protein-coupled receptor protein TGR13 of the present invention.
- Example 2 The base sequence of the probe used in Northern analysis in Example 2 below is shown.
- the transformant Escherichia coli (Escherichia coli) DH5 ⁇ / ⁇ 7 ⁇ 1 ue (R) -TGR13 obtained in Example 1 below is compared with Escherichia coli DH5 ⁇ / ⁇ 2117 From July 17, 2000 (Heisei 12), Tsukuba Higashi, Ibaraki Pref., 11-1_1, Central Incorporated Administrative Agency, National Institute of Advanced Industrial Science and Technology (AIST) Deposit No.
- FERM BP Deposited with the Fermentation Research Institute (IFO) at 7-17-85 (Postal Code 532-8686), 2-17-Honcho, Yodogawa-ku, Osaka-shi, Osaka from July 4, 2000 as 7228 Deposited as IF ⁇ 16450.
- IFO Fermentation Research Institute
- PCR reaction was performed using two primers, primer 1 (SEQ ID NO: 3) and primer 2 (SEQ ID NO: 4).
- the composition of the reaction solution used in the reaction was as follows using the above cDNA 5/21 as type III, 11 volumes of Pfu Turbo DNA polymerase (Stratagene), primer 1 (SEQ ID NO: 3) and primer 2 (SEQ ID NO: 3). : 4) was added to each of 0 ⁇ 5 / ⁇ , dNTPs was added to 200 M, and the buffer attached to the enzyme was added to 5 ⁇ 1 to obtain 51 liquid volumes.
- the PCR reaction is performed at 95 ° C for 1 minute, followed by 95 ° C for 10 seconds, 65 ° C for 30 seconds, 72 ° C for 1 minute 35 times, and finally for 72 ° C for 10 minutes.
- the plasmid vector pT7B1ue (R) (R) was prepared according to the recipe of DNA Ligation Kit Ver. 2 (Takara Shuzo). Novagen). This was introduced into Escherichia coli DH5, and clones having cDNA were selected on LB agar medium containing ampicillin.
- a cDNA sequence (SEQ ID NO: 2) encoding a novel G protein-coupled receptor Yuichi protein was obtained.
- the novel G protein-coupled receptor Yuichi protein having this amino acid sequence (SEQ ID NO: 1) was named TGR13.
- the transformant was named Escherichia coli DH5 ⁇ / ⁇ 7Blue (R) -TGR13. Plasmid pT7Blue (R) —TGR13 is sometimes referred to as pTB2117.
- FIG. 1 shows a hydrophobic plot of TGR13.
- Example 2 Expression of TGR13 in Human Tissue and Examination of Its Tissue Specificity
- a probe used for Northern analysis was obtained in the following manner. 359 bp cDNA fragment cut out by restriction enzyme Xho I and Sma I treatment using ⁇ RF of TGR13 obtained from the Mart on Ready cDNA Library (CLONTECH) derived from human adipocytes (SEQ ID NO: 5) I got
- TGR13 mRNA expression was analyzed (FIG. 3). As shown in FIG. 3, two mRNAs of about 2.4 kb and about 5 kb were detected, and it was found that about 2.4 kb of TGR13 mRNA was specifically expressed in the testis.
- the G protein-coupled receptor protein of the present invention or its partial peptide or a salt thereof, and the polynucleotide encoding the receptor protein or its partial peptide are: (Agonist), (2) Obtaining antibodies and antisera, (3) Constructing an expression system for recombinant receptor protein, and (4) Developing a receptor binding system using the same expression system and a drug candidate compound Screening ⁇ Structurally similar ligands ⁇ ⁇ ⁇ ⁇ Conduct drug design based on comparison with receptor ⁇ ⁇ ⁇ ⁇ ⁇ Reagents for preparing probes and PCR primers in genetic diagnosis 7 Preparation of transgenic animals Or (2) Gene prevention • It can be used as a drug such as a therapeutic agent.
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AU2001267898A AU2001267898A1 (en) | 2000-07-04 | 2001-07-02 | Novel g protein-coupled receptor protein and dna thereof |
US10/332,032 US20040086940A1 (en) | 2000-07-04 | 2001-07-02 | Novel g protein-coupled receptor protein and dna thereof |
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JP2000206860 | 2000-07-04 | ||
JP2000-206860 | 2000-07-04 | ||
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JP2000235274 | 2000-07-31 |
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PCT/JP2001/005711 WO2002002767A1 (fr) | 2000-07-04 | 2001-07-02 | Proteine de recepteur couple a la proteine g et adn correspondant |
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2002083736A3 (en) * | 2001-02-14 | 2003-11-20 | Amgen Inc | G-protein coupled receptor molecules and uses thereof |
US7189524B1 (en) | 2002-11-25 | 2007-03-13 | Amgen, Inc. | Receptor ligands and methods of modulating receptors |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1998056820A1 (en) * | 1997-06-12 | 1998-12-17 | Smithkline Beecham Corporation | Hm74a receptor |
WO2000022129A1 (en) * | 1998-10-13 | 2000-04-20 | Arena Pharmaceuticals, Inc. | Non-endogenous, constitutively activated human g protein-coupled receptors |
-
2001
- 2001-07-02 US US10/332,032 patent/US20040086940A1/en not_active Abandoned
- 2001-07-02 AU AU2001267898A patent/AU2001267898A1/en not_active Abandoned
- 2001-07-02 WO PCT/JP2001/005711 patent/WO2002002767A1/ja active Application Filing
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Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1998056820A1 (en) * | 1997-06-12 | 1998-12-17 | Smithkline Beecham Corporation | Hm74a receptor |
WO2000022129A1 (en) * | 1998-10-13 | 2000-04-20 | Arena Pharmaceuticals, Inc. | Non-endogenous, constitutively activated human g protein-coupled receptors |
Non-Patent Citations (1)
Title |
---|
HIDEKI NOMURA ET AL.: "Molecular cloning of cDNAs encoding a LF78 receptor and putative leukocyte chemotactic peptide receptors", INTERNATIONAL IMMUNOLOGY, vol. 5, no. 10, 1993, pages 1239 - 1249, XP002943460 * |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2002083736A3 (en) * | 2001-02-14 | 2003-11-20 | Amgen Inc | G-protein coupled receptor molecules and uses thereof |
US7189524B1 (en) | 2002-11-25 | 2007-03-13 | Amgen, Inc. | Receptor ligands and methods of modulating receptors |
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AU2001267898A1 (en) | 2002-01-14 |
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