WO2005072767A1 - 糖代謝機能改善剤 - Google Patents
糖代謝機能改善剤 Download PDFInfo
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- WO2005072767A1 WO2005072767A1 PCT/JP2005/001256 JP2005001256W WO2005072767A1 WO 2005072767 A1 WO2005072767 A1 WO 2005072767A1 JP 2005001256 W JP2005001256 W JP 2005001256W WO 2005072767 A1 WO2005072767 A1 WO 2005072767A1
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Classifications
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K38/00—Medicinal preparations containing peptides
- A61K38/16—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof
- A61K38/43—Enzymes; Proenzymes; Derivatives thereof
- A61K38/45—Transferases (2)
-
- 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
- A61P3/08—Drugs for disorders of the metabolism for glucose homeostasis
- A61P3/10—Drugs for disorders of the metabolism for glucose homeostasis for hyperglycaemia, e.g. antidiabetics
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P5/00—Drugs for disorders of the endocrine system
- A61P5/48—Drugs for disorders of the endocrine system of the pancreatic hormones
- A61P5/50—Drugs for disorders of the endocrine system of the pancreatic hormones for increasing or potentiating the activity of insulin
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01K—ANIMAL HUSBANDRY; AVICULTURE; APICULTURE; PISCICULTURE; FISHING; REARING OR BREEDING ANIMALS, NOT OTHERWISE PROVIDED FOR; NEW BREEDS OF ANIMALS
- A01K2267/00—Animals characterised by purpose
- A01K2267/03—Animal model, e.g. for test or diseases
- A01K2267/035—Animal model for multifactorial diseases
- A01K2267/0362—Animal model for lipid/glucose metabolism, e.g. obesity, type-2 diabetes
Definitions
- the present invention relates to a glucose metabolism-related disorder, more specifically, a glucose metabolism-related disease, which has an activity of promoting insulin signaling such as a glucose uptake promoting activity in muscle or a gluconeogenesis inhibitory activity in liver. And a therapeutic or prophylactic agent.
- Diabetes is a state in which the homeostasis of glucose metabolism (sugar renewal and clearance) in a living body is disrupted, particularly a condition in which a hyperglycemic state is maintained. Behind the pathology of diabetes are insufficiency in secretion and insufficiency of insulin, a glycemic control hormone. It can be treated or prevented.
- insulin has been known as an in vivo substance (hormone) that improves glucose metabolism, and there is a need for a drug that is superior in the ability of insulin preparations to improve glucose metabolism.
- Patent Document 1 a protein consisting of the amino acid sequence represented by SEQ ID NO: 2 is used for diagnosing fat storage syndrome (see Patent Document 1), and has a function of promoting fat storage in fat cells (Patent Document 1). 2) are known.
- Patent Document 1 a protein consisting of the amino acid sequence represented by SEQ ID NO: 2 is used for diagnosing fat storage syndrome (see Patent Document 1), and has a function of promoting fat storage in fat cells (Patent Document 1). 2) are known.
- Patent Document 2 the insulin-like activity of the protein was not known.
- Patent Document 1 WO 00/62073 pamphlet
- Patent Document 2 WO 02/10772 pamphlet
- the problem to be solved by the present invention is to provide a novel agent for improving glucose metabolic function, more specifically, a therapeutic or preventive agent for a glucose metabolism-related disease, which has an insulin signal transmission promoting activity. It is in.
- the present inventors have conducted intensive studies under such circumstances, and as a result, it has been found that a protein consisting of the amino acid sequence represented by SEQ ID NO: 2 has an activity of improving glucose metabolism function, specifically, an activity of promoting insulin signaling.
- the present inventors have found that they have an effect of improving the glucose metabolism function in vivo, and have completed the present invention.
- the present invention provides
- An agent for treating or preventing a glucose metabolism-related disease comprising as an active ingredient a protein consisting of a protein or a fragment thereof.
- insulin-like activity is an insulin signaling promotion activity in fat cells, hepatocytes or muscle cells.
- insulin-like activity is a gluconeogenesis inhibitory activity in hepatocytes or a glucose uptake promoting activity in muscle cells.
- (C) a nucleotide sequence encoding a partial amino acid sequence obtained by deleting 26 amino acids from the amino terminus of the amino acid sequence represented by SEQ ID NO: 2,
- (G) a base sequence having at least 80% sequence identity with the base sequence represented by the 18th to 1493th nucleotides in the base sequence represented by SEQ ID NO: 1 Having a sequence, and having the protein power S insulin-like activity encoded by the base sequence, a base sequence, or
- (H) a nucleotide sequence complementary to the nucleotide sequence from the 18th nucleotide to the 1493th nucleotide in the nucleotide sequence represented by SEQ ID NO: 1 and a nucleotide sequence that hybridizes under stringent conditions A nucleotide sequence having an insulin-like activity;
- An agent for treating or preventing a glucose metabolism-related disease comprising a potent base sequence or a fragment thereof as an active ingredient.
- insulin-like activity is a gluconeogenesis inhibitory activity in hepatocytes or a glucose uptake promoting activity in muscle cells.
- a third step of evaluating the insulin-like activity of the test substance by comparing the measured values obtained when the first step and the second step are performed using a protein consisting of any one of the above amino acid sequences;
- a method for assaying insulin-like activity comprising:
- Insulin signaling promotion activity S Insulin signaling promotion activity S, insulin receptor, IRS_1, PI3 kinase 15.
- test substance has any one of the following amino acid sequences (a) to (h):
- a method for assaying the regulatory activity of a test substance for insulin-like activity comprising the step of determining whether or not to regulate the expression of a protein consisting of: or a nucleic acid comprising a nucleotide sequence encoding the protein.
- a candidate substance for a therapeutic or prophylactic agent for a glucose metabolism-related disease is selected by using, as an index, the insulin-like activity-modulating activity of a test substance measured by the assay method described in Item 21. For searching for a therapeutic or prophylactic agent for a sugar metabolism-related disease
- the therapeutic or preventive agent for a glucose metabolism-related disease is an insulin signal transduction promoter in muscle cells, fat cells or hepatocytes.
- the therapeutic or preventive agent for a glucose metabolism-related disease is a gluconeogenesis inhibitor in the liver.
- the therapeutic or prophylactic agent for the sugar metabolism-related disease is selected from the group consisting of polypeptides, nucleic acids, sugar chains, lipids, low organic molecules, and complex molecules thereof.
- a therapeutic or preventive agent for a glucose metabolism-related disease comprising as an active ingredient a substance selected by the search method according to item 31.
- a system for assaying a modulatory activity of a test substance for insulin-like activity comprising:
- nucleic acid comprising a base sequence encoding the protein
- a system comprising:
- the determination means includes a means for measuring the expression level of the protein or a means for measuring the expression level of the nucleic acid.
- a system for searching for a therapeutic or preventive agent for a sugar metabolism-related disease comprising:
- nucleic acid comprising a base sequence encoding the protein
- a system comprising:
- the activity of regulating insulin-like activity is enhanced by insulin-like activity, and the enhancement is performed by maintaining or increasing the expression level of the protein or the nucleic acid.
- a method for treating or preventing a glucose metabolism-related disease comprises: A) a protein having the following amino acid sequence:
- (C) a nucleotide sequence encoding a partial amino acid sequence obtained by deleting 26 amino acids from the amino terminus of the amino acid sequence represented by SEQ ID NO: 2,
- (G) a nucleotide sequence having 80% or more sequence identity with the nucleotide sequence represented by the 18th nucleotide to the 1493rd nucleotide in the nucleotide sequence represented by SEQ ID NO: 1, and The sequence encodes a protein that has S-insulin-like activity, a base sequence, or
- (H) a nucleotide sequence complementary to the nucleotide sequence from the 18th nucleotide to the 1493rd nucleotide in the nucleotide sequence represented by SEQ ID NO: 1 and a nucleotide sequence that hybridizes under stringent conditions
- the base sequence is A protein sequence that has S-insulin-like activity
- a method comprising:
- step A) comprises administering a therapeutic or prophylactic agent for the sugar metabolism-related disease according to item 1, 6, or 36 to a subject in need of treatment.
- (C) a nucleotide sequence encoding a partial amino acid sequence obtained by deleting 26 amino acids from the amino terminus of the amino acid sequence represented by SEQ ID NO: 2,
- (G) a nucleotide sequence having 80% or more sequence identity with the nucleotide sequence represented by the 18th nucleotide to the 1493rd nucleotide in the nucleotide sequence represented by SEQ ID NO: 1, and The sequence encodes a protein that has S-insulin-like activity, a base sequence, or
- (H) a nucleotide sequence complementary to the nucleotide sequence from the 18th nucleotide to the 1493th nucleotide in the nucleotide sequence represented by SEQ ID NO: 1 and a nucleotide sequence that hybridizes under stringent conditions A nucleotide sequence having an insulin-like activity;
- composition for regulating insulin-like activity comprising a base sequence consisting of or a fragment thereof as an active ingredient.
- (C) a nucleotide sequence encoding a partial amino acid sequence obtained by deleting 26 amino acids from the amino terminus of the amino acid sequence represented by SEQ ID NO: 2, (D) a nucleotide sequence encoding an amino acid sequence in which methionine is added to the amino terminus in the amino acid sequence of (C),
- (G) a nucleotide sequence having 80% or more sequence identity with the nucleotide sequence represented by the 18th nucleotide to the 1493rd nucleotide in the nucleotide sequence represented by SEQ ID NO: 1, and The sequence encodes a protein that has S-insulin-like activity, a base sequence, or
- (H) a nucleotide sequence complementary to the nucleotide sequence from the 18th nucleotide to the 1493th nucleotide in the nucleotide sequence represented by SEQ ID NO: 1 and a nucleotide sequence that hybridizes under stringent conditions A nucleotide sequence having an insulin-like activity;
- nucleotide sequence consisting of or a fragment thereof in the treatment or prevention of a sugar metabolism-related disease.
- (C) a nucleotide sequence encoding a partial amino acid sequence obtained by deleting 26 amino acids from the amino terminus of the amino acid sequence represented by SEQ ID NO: 2,
- (G) a base sequence having 80% or more sequence identity with the base sequence represented by the 18th to 1493rd nucleotides in the base sequence represented by SEQ ID NO: 1, and The protein encoded by the sequence has S insulin-like activity, Base sequence, or
- (H) a nucleotide sequence complementary to the nucleotide sequence from the 18th nucleotide to the 1493th nucleotide in the nucleotide sequence represented by SEQ ID NO: 1 and a nucleotide sequence that hybridizes under stringent conditions A nucleotide sequence having an insulin-like activity;
- nucleotide sequence consisting of or a fragment thereof in the manufacture of a composition for regulating insulin-like activity.
- (C) a nucleotide sequence encoding a partial amino acid sequence obtained by deleting 26 amino acids from the amino terminus of the amino acid sequence represented by SEQ ID NO: 2,
- (G) a nucleotide sequence having 80% or more sequence identity with the nucleotide sequence represented by the 18th nucleotide to the 1493rd nucleotide in the nucleotide sequence represented by SEQ ID NO: 1, and The sequence encodes a protein that has S-insulin-like activity, a base sequence, or
- (H) a nucleotide sequence complementary to the nucleotide sequence from the 18th nucleotide to the 1493rd nucleotide in the nucleotide sequence represented by SEQ ID NO: 1 and a nucleotide sequence that hybridizes under stringent conditions
- Adipose tissue produces various secreted proteins (fat site force-in) and their role in metabolism is important.
- the present inventors have identified a new fat site force-in in the present invention and have named it "visfatin”.
- Visfatin is highly accumulated in visceral fat in both humans and mice, and its plasma levels are elevated in obese states.
- the protein consisting of the amino acid sequence represented by SEQ ID NO: 2 is a 52-kilodalton cytokinin previously known as a B cell precursor colony promoting factor (PBEF), and is expressed on a lymphocyte. It was known to be expressed, but was not known for its glucose metabolism. It has been demonstrated that visfatin exerts an insulin-mimetic effect in cultured cells and lowers plasma glucose levels in mice.
- PBEF B cell precursor colony promoting factor
- a therapeutic or prophylactic agent for a glucose metabolism-related disease characterized by having an activity of improving a glucose metabolic function, specifically, an activity of promoting insulin signaling, a method for assaying insulin-like activity, and the assay It has become possible to provide a method for searching for a therapeutic or prophylactic agent for a glucose metabolism-related disease using the method.
- FIG. 1 Identification, expression and secretion of visfatin.
- A Human from two female volunteers Differential display using a pair of sampnoles of visceral fat and subcutaneous fat. Arrows indicate PCR fragments corresponding to visfatin.
- B 3 shows the results of Northern blot of visfatin mRNA in human visceral fat and subcutaneous fat. The fragment (a) was used as a probe.
- C Immunoblotting of visfatin protein in human and mouse derived cell culture media, cell lysates and plasma. C ⁇ S_1 cells were transfected with a visfatin expression vector.
- FIG. 2 is a view showing phosphorylation of IRS_1, PI3 kinase, and Akt molecules in muscle cells.
- FIG. 3 shows phosphorylation of IRS_1, PI3 kinase, and Akt molecules in hepatocytes.
- FIG. 7 Effects of visfatin on cultured cells (ac).
- the effects of visfatin and insulin on glucose uptake in 3T3-L1 adipocytes (a) and L6 muscle cells (b) and on glucosamine release into the medium of H4IIEC3 hepatocytes (c) were investigated. .
- Data were expressed as mean soil SD from three experiments performed in duplicate.
- D and e Effects of visfatin and insulin on triglyceride accumulation.
- IRS-1 and IRS-2 protein extracts were analyzed by immunoprecipitation with anti-IRS-1 and anti-IRS-2 antibodies and detected with anti-phosphotyrosine and anti-P13K antibodies .
- E IRS-1-related P13 kinase activity in primary cell adipocytes from testicular epithelial fat deposits from treated P47BL / 6J mice as in (b).
- F Binding of I 125 -labeled insulin or visfatin to intact HEK-293 cells was transfected with plasmid alone or plasmid code IR.
- protein protein
- polypeptide oligopeptide
- peptide a polymer of amino acids of any length and variants thereof.
- This polymer may be linear, branched, or cyclic.
- the amino acids may be naturally occurring or non-naturally occurring or modified amino acids.
- the term also includes those that can be assembled into a complex of multiple polypeptide chains.
- the term also embraces naturally or artificially modified amino acid polymers. Such modifications include, for example, disulfide bond formation, glycosylation, lipidation, acetylation, phosphorylation or any other manipulation or modification (eg, conjugation with a labeling component).
- a "protein” is preferably a protein that is compatible in the host in which the composition is to be used, but can be treated to be compatible in that host. As long as you use any protein. Whether a protein is compatible with, or can be treated to be compatible with, the host is determined by transplanting the protein into the host and, if necessary, suppressing side effects such as immune rejection The determination can be made by observing whether or not the colonization of the host is established.
- the above-mentioned compatible proteins include, but are not limited to, proteins derived from the host.
- an "isolated" biological agent eg, a nucleic acid or protein
- a nucleic acid or protein is defined as another biological agent in a cell of a naturally occurring organism in which the biological agent occurs.
- Factors for example, in the case of a nucleic acid, a factor other than the nucleic acid and a nucleic acid containing the base sequence IJ other than the target nucleic acid; and in the case of a protein, a factor other than the protein and an amino acid sequence other than the target protein are used.
- isolated nucleic acids and proteins include nucleic acids and proteins that have been purified by standard purification methods. Thus, isolated nucleic acids and proteins include chemically synthesized nucleic acids and proteins.
- a “purified" biological agent eg, a nucleic acid or protein
- a biological agent in which at least a part of a factor naturally associated with the biological agent has been removed. Say. Thus, typically, the purity of the biological agent in the purified biological agent is higher (ie, more concentrated) than in the state in which the biological agent is normally present.
- the biomolecule used in the present invention can be collected from a living body or can be chemically synthesized by a method known to those skilled in the art.
- a method of synthesis using an automated solid phase peptide synthesizer is described by: Stewart, JM et a 1., ⁇ 984).
- Solid Phase Peptide Synthesis Pierce Chemica LCo .; Grant, GA (1992) .Synthetic Peptides: A User's Guide, WH Freeman; Bodanszky, M. (1993) .Principles of Peptide Synthesis, Springer—Ver lag; Bodanszky, M. et al.
- the term “homology” of a biomolecule refers to a sequence having a comparable sequence.
- the higher the homology between two sequences the higher the identity or similarity between those sequences.
- Whether the two sequences have homology can be determined by a direct comparison of the sequences, or, in the case of nucleic acids, by a hybridization method under stringent conditions.
- sequences between the sequences are typically at least 50% identical, preferably at least 70% identical, more preferably at least 80% , 90%, 95%, 96%, 97%, 98% or 99% identical, the genes are homologous.
- similarity of a biomolecule (eg, base sequence, amino acid sequence, etc.) refers to two or more gene sequences when conservative substitutions are regarded as positive (identical) in the above homology. Are the degrees of identity with each other. Thus, if there are conservative substitutions, identity and similarity will be different depending on the existence of the conservative substitution. When there is no conservative substitution, identity and similarity show the same numerical value. In the present invention, those with high identity or high similarity may also be useful.
- sequence identity refers to sequence identity and homology between two DNAs or two proteins.
- sequence identity is determined by comparing two sequences aligned optimally over the region of the sequence to be compared.
- the DNA or protein to be compared may have an addition or a deletion (for example, a gap or the like) in the optimal alignment of the two sequences.
- sequence homology for example, using the ClustalW algorithm (Nucleic Acid Res., 22 (22): 673-4680 (1994) and can be calculated by creating an alignment.
- sequence identity was determined by using sequence analysis software, specifically, Vector NTI,
- the public database is, for example, a homepage address
- sequence identity in the present invention may be 80% or more, preferably 90 ° / o or more, and more preferably 95% or more.
- the term "corresponding" gene refers to a gene that is, in a certain species, a force having the same action as a predetermined gene in a species to be compared, or a gene that is predicted to have the same effect.
- the corresponding gene of a gene may be the ortholog of that gene. Therefore, a region corresponding to a region having a promoter activity in a sugar metabolism gene or a human adiponectin gene can be found in other animals (mouse, rat, pigeon, pea etc.).
- corresponding genes, or promoter regions can be identified using techniques well known in the art, based on the disclosure herein. Therefore, for example, the corresponding gene in an animal can be obtained by searching the sequence database of the animal (eg, mouse, rat) using the sequence of the reference gene of the corresponding gene (eg, human adiponectin promoter) as a query sequence. Can be found by:
- the "corresponding" amino acid or nucleic acid refers to a given polypeptide molecule or polynucleotide molecule, respectively, and is the same as a predetermined amino acid in a polypeptide or polynucleotide used as a reference for comparison.
- Has the ability to act S has the ability to possess predicted amino acids or nucleic acids, especially in enzyme molecules, at the same position in the active site and has a similar contribution to catalytic activity refers to amino acids.
- an antisense molecule of a polynucleotide may be a similar portion of an ortholog corresponding to a particular portion of the antisense molecule.
- corresponding nucleotide In the case of the promoter of the present invention, a portion corresponding to the nucleotide sequence of the present invention is referred to as a “corresponding nucleotide. It is understood to correspond to "reotide”.
- the similarity, identity, and homology comparison of the amino acid sequence and the base sequence are calculated using BLAST, a sequence analysis tool, with default parameters.
- An identity search can be performed, for example, using NCBI's BLAST 2.2.9 (issued on May 12, 2004).
- the value of identity usually refers to a value obtained when the above BLAST is used, and alignment is performed under default conditions. However, if a higher value comes out due to a change in the parameter, the highest value shall be the value of the identity. If the identity is evaluated in multiple areas, the highest value among them is the identity value.
- search refers to another nucleus having a specific function and Z or property by utilizing a certain nucleobase sequence electronically, biologically or by another method. This refers to finding an acid base sequence.
- Electronic search includes BLAST (Altschul et al., J. Mol. Biol. 215: 403-410 (1990)), FASTA (Pearson & Lipman, Proc. Natl. Acad. Sci., USA 85: 2444). —2448 (1988)), Smith and Waterman method (Smith and Waterman, J. Mol. Biol. 147: 195—197 (1981)), and Needleman and Wunsch method (Needleman and Wunsch, J. Mol. Biol.
- Bio searches include stringent hybridization, macroarrays in which genomic DNA is shell-filled on a nylon membrane or the like, microarrays attached to glass plates (microarray assays), PCR and in situ Examples include, but are not limited to, hybridization.
- the PPAR used in the present invention should also include a corresponding gene identified by such an electronic search and a biological search.
- the percentages of "identity”, “homology”, and “similarity” of a sequence are determined by comparing two sequences that are optimally aligned in the comparison window. Is determined by comparing.
- the portion of the polynucleotide or polypeptide sequence within the comparison window is the reference sequence for the optimal alignment of the two sequences (a gap may occur if other sequences contain additions).
- the reference sequence here has no additions or deletions. Yap) may be included.
- the number of match positions is determined, the number of match positions is divided by the total number of positions in the comparison window, and the result obtained Multiply by 100 to calculate percentage identity.
- homology is evaluated using an appropriate one of various sequence comparison algorithms and programs well known in the art.
- sequence comparison algorithms and programs include TBLA STN, BLASTP, FASTA, TFASTA and CLUSTALW (Pearson and Lipman, 1988, Pro Natl. Acad. Sci. USA 85 (8): 2444-2448, Altschul et al., 1990. 215 (3): 403-410, Thompson et al., 1994, Nucleic Acids Res.
- the BLAST program uses a similar sequence called a "high score segment pair" between an amino acid query sequence or a nucleic acid query sequence and a test sequence, which is preferably obtained from a protein sequence database or a base sequence database.
- the homologous sequence is identified by specifying the segment of the sequence.
- many high score segment pairs are identified (ie, organized 1J) by a scoring matrix well known in the art.
- a BLOSUM62 matrix (Gonnet et al., 1992, Science 256: 1443-1445, Henikoff and Henikoff, 1993, Proteins 17: 49-61) is used as the scoring matrix.
- PAM or PAM250 matrices can also be used (eg, Schwartz and Dayhoff, eds., 1978, Matrices for Detecting Distance Relationships: Atlas of Protocol Sequence and Structure, Washington: National Biomedical See Research Foundation).
- the BLAST program evaluates the statistical significance of all identified high score segment pairs and preferably selects segments that meet a user-defined significance threshold level, such as a user-specific homology. Do It is preferable to evaluate the statistical significance of high-score segment pairs using Karlin's formula for statistical significance (see Karlin and Altschul, 1990, Proc. Natl. Acad. Sci. USA 87: 2267-2268). That).
- the nucleic acid molecule used in the present specification has a part of the nucleic acid sequence deleted as described above, as long as the expressed polypeptide has substantially the same activity as the naturally-occurring polypeptide. Alternatively, it may be substituted by another base, or a part of another base sequence may be inserted. Alternatively, another nucleic acid may be bound to the 5 ′ end and the Z or 3 ′ end. Further, a nucleic acid molecule that hybridizes under stringent conditions and has substantially the same function (promoter activity in the present invention) may be used.
- amino acid may be natural or non-natural.
- “Derivative amino acids” or “amino acid analogs” refer to amino acids that differ from naturally occurring amino acids but have the same function as the original amino acids. Such derivatives amino acids and amino acids Nalog is well known in the art.
- natural amino acid refers to the L-isomer of a natural amino acid. Natural amino acids include glycine, alanine, valine, leucine, isoleucine, serine, methionine, threonine, fenylalanine, tyrosine, tryptophan, cysteine, proline, histidine, aspartic acid, asparagine, gnoletamic acid, gnoletamine, and 7 — Carboxyglutamic acid, anoreginin, orditin, and lysine. Unless otherwise indicated, all amino acids referred to herein are L-forms, but forms using D-form amino acids are also within the scope of the present invention.
- amino acid variant refers to a molecule that is not a natural amino acid but is similar in physical properties and Z or function to a natural amino acid.
- amino acid variants include those in which an alkyl group, a halo group, a nitro group, etc. are bonded to the benzyl side chain (para, meta, ortho, etc.) of phenylalanine, etyonine, canavanine, 2_methylglutamine And so on. It is understood that, in the present invention, amino acid variants may include unnatural amino acids and amino acid mimetics.
- unnatural amino acid means an amino acid that is not normally found in nature in a protein.
- unnatural amino acids include norleucine, para-nitrophenylalanine, homophenylalanine, para-fluorophenylalanine, 3-amino-12-benzylpropionic acid, D- or L-form of homoarginine, and D_phenylalanine Are listed.
- fragment refers to a polypeptide or polynucleotide having a sequence length of up to 11-1 relative to a full-length polypeptide or polynucleotide (having a length of n). Polynucleotide.
- the length of the fragment can be appropriately changed depending on the purpose.For example, the lower limit of the length is 3, 4, 5, 6, 7, 8, 9, 10 for a polypeptide. , 15,20,25,30,40,50 and more amino acids, and the lengths represented by specifically listed non-integer integers (eg, 11 and the like) are also lower limits. As appropriate.
- nucleotide 5 6, 7, 8, 9, 10, 15, 20, 25, 30, 40, 50, 75, 100 and more nucleotides may be mentioned, and specifically listed here.
- a length expressed as a non-integer integer eg, 11, etc.
- such a fragment can also be used in the same manner as the full-length one, as long as a desired purpose (eg, a cell attracting effect, etc.) is achieved. Is understood.
- the length of a polypeptide or a polynucleotide is a force that can be represented by the number of amino acids or nucleic acids, respectively, as described above.
- the above-mentioned number as an upper limit or a lower limit is intended to include a few above and below (or, for example, 10% above and below) the number.
- “about” may be used before the number. However, in this specification it should be reasoned that the presence or absence of “about” does not affect the interpretation of that number.
- polynucleotide As used herein, the terms “polynucleotide”, “oligonucleotide” and “nucleic acid” are used interchangeably herein and refer to a nucleotide polymer of any length. The term also includes “oligonucleotide derivatives" or “polynucleotide derivatives”. The term “oligonucleotide derivative” or “polynucleotide derivative” includes oligonucleotide derivatives or polynucleotides or polynucleotides having unusual linkages between nucleotides, and is used interchangeably.
- oligonucleotide examples include, for example, 2,1-O-methyl-ribonucleotide, an oligonucleotide derivative in which a phosphoric diester bond in an oligonucleotide is converted to a phosphorothioate bond, and an oligonucleotide.
- nucleotide sequence may also be conservatively modified (e.g., degenerate codon substitutions) and complemented with the same sequence as the explicitly indicated sequence. It is contemplated to include System 1J. Specifically, degenerate codon substitutions create a sequence in which the third position of one or more selected but not all codons is replaced with a mixed base and a Z or deoxyinosine residue. (Batzer et al., Nucleic Acid Res. 19: 5081 (1991); Oht Snorelephoninoleurea ka et al., J. Biol. Chem. 260: 2605-26 08 (1985); Rossolini et al., Mol. Cell. Probes 8: 91-98 (1994)).
- nucleotide refers to a nucleoside in which the sugar moiety is a phosphate ester, including DNA, RNA, and the like, whether natural or non-natural.
- a nucleoside refers to a compound in which a base and a sugar form an N-glycoside bond.
- nucleotide derivative or “nucleotide analog” refers to a substance having the same function as a nucleotide having a different force from a naturally occurring nucleotide. Such derivative nucleotides and nucleotide analogs are well known in the art.
- nucleotides and nucleotide analogs include, but are not limited to, phosphorothioates, phosphonoreamidates, methylphosphonates, chiral methylphosphonates, 2-0-methylribonucleotides, peptide mononucleic acids (PNA) .
- DNA includes cDNA, genomic DNA, and synthetic DNA.
- variant refers to a substance in which a substance such as an original polypeptide or polynucleotide is partially changed. Such variants include substitutional variants, addition variants, deletion variants, truncated variants, allelic variants, and the like. Such variants can also be used as the cell growth factor of the present invention as long as the desired purpose can be achieved. Alleles refer to genetic variants that belong to the same locus and are distinct from each other. Therefore, “allelic variant” refers to a variant that has an allelic relationship to a certain gene. Such allelic variants usually have sequences that are identical or very similar to their corresponding alleles, usually have nearly identical biological activities, but rarely differ in biological activities. It may also have. A "species homolog or homolog” is a species Among them, homology (preferably, amino acid level or nucleotide level)
- ortholog is also called an orthologous gene, and refers to a gene derived from speciation from a common ancestor having two genes.
- the human and mouse spleen hemoglobin genes are orthologs.
- the human spleen hemoglobin gene and the ⁇ hemoglobin gene are paralogs (genes generated by gene duplication). It is.
- Orthologs are useful for estimating molecular phylogenetic trees. Oronologs of the present invention may also be useful in the present invention, since onoresologs can usually perform the same function in another species as the original species.
- a conservatively modified variant refers to a nucleic acid that encodes the same or essentially the same amino acid sequence, and if the nucleic acid does not encode an amino acid sequence, To the same sequence. Due to the degeneracy of the genetic code, many functionally identical nucleic acids encode any given protein. For example, the codons GCA, GCC, GCG, and GCU all encode the amino acid alanine. Thus, at every position where an alanine is specified by a codon, that codon can be changed to any of the corresponding codons described, without altering the encoded polypeptide.
- Such a nucleic acid can be obtained by a well-known PCR method, and can also be chemically synthesized. These methods may be combined with, for example, a site-specific displacement induction method, a hybridization method, or the like.
- Amino acids may be referred to herein by either their commonly known three letter symbols or by the one-letter symbols recommended by the IUPAC-IUB Biochemica LNomenclature Commission. Nucleotides may also be referred to by the generally recognized one-letter code.
- vector refers to a vector that can transfer a target polynucleotide sequence into a target cell.
- vectors include those capable of autonomous replication in host cells such as prokaryotic cells, yeast, animal cells, plant cells, insect cells, animal individuals and plant individuals, or capable of integration into chromosomes. Is done.
- cloning vector the one suitable for cloning is called “cloning vector”.
- Such cloning vectors usually contain a multiple cloning site which contains multiple restriction enzyme sites. Such a restriction enzyme site and a multiple cloning site are well known in the art and can be appropriately selected and used by those skilled in the art according to the purpose. Such techniques are described in the literature described herein (eg, Sambrook et al., Supra).
- expression vector refers to a structural gene and a promoter that regulates its expression, as well as various regulatory elements that are operably linked in a host cell.
- the regulatory elements may preferably include a terminator, a selectable marker such as a drug resistance gene, and a heterogeneous gene. It is well known to those skilled in the art that the type of expression vector of an organism (for example, an animal) and the type of regulatory element used S may vary depending on the host cell.
- Examples of the "recombinant vector" for prokaryotic cells that can be used in the present invention include pcDNA3 (+), pBluescript-SK (+ Z-), pGEM-T, pEF-BOS, pEGFP, pHAT, pUC18, and pFT_DEST. TM 42GATEWAY (Invitrogen) and the like.
- Examples of the "recombinant vector" for animal cells that can be used in the present invention include pcDNAI / Amp, pcDNAI, pCDM8 (also available from Funakoshi), pAGE107 [Japanese Unexamined Patent Publication No. 3-229 (Invitrogen), pAGE103 U. Biochem., 101, 1307 (1987)], pAMo, pAMoAU. Biol. Chem., 268, 22782-22787 (1993)], based on Murine Stem Cell Virus (MSCV). And retroviral expression vectors, pEF-B ⁇ S, pEGFP and the like.
- terminal 1 is located downstream of the gene coding region of a gene, terminates transcription when DNA is transcribed into mRNA, and imposes a poly-A sequence. It is an array that contributes to kan. It is known that the terminator is involved in mRNA stability and affects the expression level of a gene.
- promoter refers to a region on DNA that determines the transcription initiation site of a gene and that directly regulates the frequency of transcription, and is usually bound by RNA polymerase to regulate transcription.
- the starting base sequence Therefore, in the present specification, a portion of a gene having a promoter function is referred to as a “promoter portion”. Since the promoter region is usually a region within about 2 kbp upstream of the first exon of the putative protein coding region, if the protein coding region in the genomic nucleotide sequence is predicted using DNA analysis software, The area can be estimated.
- the putative promoter region varies for each structural gene, but is usually located upstream of the structural gene, but is not limited thereto, and may be located downstream of the structural gene. Preferably, the putative promoter region is within about 2 kbp upstream of the first exon translation start site. In the present invention, a region about 3.6 kb upstream of the translation start point is identified as a promoter region, and this region is They have been found to result in high expression capacity and high specificity in adipocytes.
- the term “enhancer” refers to a sequence used for enhancing the expression efficiency of a target gene. Such enhancers are well known in the art. A plurality of forces that can be used may be used or one may not be used.
- operably linked refers to a transcriptional / translational regulatory system (eg, promoter, enhancer, etc.) or a translational regulatory sequence that is capable of expressing (operating) a desired sequence. Is placed under the control of.
- the promoter is usually located immediately upstream of the gene, but need not necessarily be located adjacent to the gene.
- any technique for introducing a nucleic acid molecule into a cell may be used. Examples thereof include transformation, transduction, and transfusion. Techniques for introducing such nucleic acid molecules are well known and commonly used in the art, and are described, for example, in Ausubel FA et al. (1988), Current Protocols in Molecular Biology, Wiley, New York; NY; Sambrook J et al. "987) Molecular Cloning: A Laboratory Manual, 2nd Ed. And its two counterparts, Cold Spring Harbor Laboratory Press, Cold Spring Harbor, NY. Co., 1997. Gene transfer can be confirmed using the methods described herein, such as Northern blot, Western blot analysis, or other well-known techniques.
- any of the above-described methods for introducing DNA into cells can be used, and examples thereof include transfection, transduction, and transformation (for example, Calcium phosphate method, ribosome method, DEAE dextran method, electroporation method, method using particle gun (gene gun), etc.).
- transformant refers to all or a part of an organism such as a cell produced by transformation.
- examples of the transformant include prokaryotic cells, yeast, animal cells, plant cells, insect cells, and the like.
- a transformant is also called a transformed cell, a transformed tissue, a transformed host, or the like, depending on the target.
- the cells used in the present invention may be transformants.
- prokaryotic itoda vesicles include those belonging to the genus Escherichia, Serratia, Bacillus, Brevibacterium, Corynebacterium j3 ⁇ 4, Microbacterium U, Pseudomonas U, and the like.
- Cells for example, Escherichia coli XL1-Blue, Escherichia coli XL2-Bue, and Escherichia coli DH1 are shown in column f.
- animal cells include mouse myeloma cells, rat myeloma cells, mouse hybridoma cells, Chinese mouse cells, CH ⁇ cells and BHK cells, And African green monkey kidney cells, human leukemia cells, HBT5637 (JP-A-63-299), and human colon cancer cell lines.
- African green monkeys such as ps20 and NSO for mouse 'myeloma cells, YB2Z0 for rat' myeloma cells, HEK293 (ATCC: CRL-1573) for human fetal kidney cells, and BALL-1 for human leukemia cells
- kidney cells include COS_1 and C ⁇ S_7
- human colon cancer cell lines include HCT-15, human neuroblastoma SK—N_SH, SK—N_SH_5Y, and mouse neuroblastoma Neuro2A.
- any method for introducing a recombinant vector can be used as long as it is a method for introducing DNA.
- a calcium chloride method an etatroporation method, and the like.
- lipofection method lipofection method
- spheroplast method Proc. Natl. Acad. Sci. USA, 84, 1929 (1978)]
- lithium acetate method Bacteriol., 153, 163 (1983) Natl. Acad. Sci. USA, 75, 1929 (1978).
- a retrovirus infection method is well known in the art, for example, as described in Current Protocols in Molecular Biology, supra (particularly Units 9.9-9.14),
- the culture supernatant of virus-producing cells (virus-producing cells) (packaging cell lines) is By co-culturing together for 1-2 hours, a sufficient amount of infected cells can be obtained.
- biomolecule refers to a molecule related to a living body and an aggregate thereof.
- organ refers to a biological organism, including but not limited to animals, plants, fungi, viruses, and the like.
- Biomolecules include, but are not limited to, molecules extracted from living organisms and aggregates thereof, and are defined as biomolecules as long as they are molecules and aggregates that can affect living organisms. Therefore, small molecules that can be used as pharmaceuticals (for example, small molecule ligands) are also included in the definition of biomolecules as long as their effects on living organisms can be expected.
- biomolecules include proteins, polypeptides, oligopeptides, peptides, polynucleotides, oligonucleotides, nucleotides, nucleic acids (eg, DNA such as cDNA, genomic DNA, and RNA such as mRNA), Polysaccharides, oligosaccharides, lipids, small molecules (eg, hormones, ligands, messengers, small organic molecules, etc.), their complex molecules, and their aggregates (eg, extracellular matrix, fibers, etc.) Included, but not limited to. As used herein, a biomolecule is intended to include any factor that interacts with glucose metabolism.
- in vivo or “in vivo” (in vivo) refers to the inside of a living body.
- in vivo refers to the location where the tissue or organ of interest is to be located. When performing screening, in vivo screening can be performed.
- in vitro refers to a state in which a part of a living body has been extracted or released "out of the body" (for example, in a test tube) for various research purposes. A term that contrasts with in vivo. When performing screening, in vitro screening can be performed.
- glucose As used herein with respect to blood, "sugar” and “glucose” are used interchangeably, and the concentration of sugar or glucose in blood is referred to as blood glucose, blood glucose, blood gnorecose, and the like. .
- the present invention relates to a therapeutic or preventive agent for a sugar metabolism-related disease containing the present protein (also referred to as visfatin) or a fragment thereof as an active ingredient.
- a sugar metabolism-related disease containing the present protein (also referred to as visfatin) or a fragment thereof as an active ingredient.
- the present protein used in the present specification refers to (a) the amino acid sequence represented by SEQ ID NO: 2, and (b) the amino acid sequence represented by SEQ ID NO: 2 in which one or more amino acids are deleted or added. Or, a substituted amino acid sequence 1J, (c) a partial amino acid sequence 1J in the amino acid sequence represented by SEQ ID NO: 2 in which 26 amino acids have been deleted from its amino terminal, (d) the above (c) (E) an amino acid sequence having 80% or more sequence identity with the amino acid sequence represented by SEQ ID NO: 2; (f) an amino acid sequence having 80% or more sequence identity with the amino acid sequence represented by SEQ ID NO: 1 An amino acid sequence encoded by a DNA having a nucleotide sequence represented by the nucleotide sequence from the 18th nucleotide to the 1493rd nucleotide in the nucleotide sequence; (g) the amino acid sequence represented by SEQ ID NO: 1 A nucleotide sequence having a sequence identity of
- “deletion, addition or substitution of amino acid” in the above (b) and “80% or more sequence identity” in the above (e) and (g) include, for example, SEQ ID NO: 2. It includes the intracellular processing of a protein having the indicated amino acid sequence, mutations that occur naturally due to species differences, individual differences, differences between tissues, etc., from which the protein is derived, artificial amino acid mutations, and the like.
- a method for artificially performing the above-described method is to perform a conventional site-specific mutagenesis on a DNA encoding the amino acid sequence represented by SEQ ID NO: 2, and then express the DNA by a conventional method.
- the site-directed mutagenesis method include a method using an amber mutation (gapped 'duplex method, Nucleic Acids Res., 12,9441-9456 (1984)), and PCR using a mutagenesis primer. Method and the like.
- the number of amino acids modified above is at least one residue, specifically one or several, or more.
- the number of such modifications may be within a range where the insulin-like activity of the protein can be found.
- substitution is more preferably an amino acid having similar properties such as hydrophobicity, charge, pK, and steric structure.
- substitutions include, for example, (1) glycine, alanine; (2) valine, isoleucine, leucine; (3) aspartic acid, glutamic acid, asparagine, glutamine, (4) serine, threonine; (5) lysine Arginine; (6) substitution within the group of phenylalanine and tyrosine.
- hybridize under stringent conditions in the above (h), the hybridization used herein is, for example, Sambrook J., Frisch EF, Maniatis T., Molecular Cloning 2ndedition, It can be carried out according to the usual method of self-loading in the Cold Spring Harbor Laboratory press or the like.
- “Stringent conditions” refers to, for example, a solution containing 6X SSC (a solution containing 1.5M NaCU 0.15M trisodium citrate as 10X SSC) and a solution containing 50% formamide at 45 ° C. After forming a hybrid at C, conditions such as washing with 2 ⁇ SSC at 50 ° C.
- the salt concentration in the washing step can be from 2 x SSC at 50 ° C (low stringency conditions) to 0.2 x SSC – 50 ° C3 ⁇ 4-C (high stringency conditions). You can choose.
- the temperature in the washing step can be selected, for example, from room temperature (low stringency conditions) to 65 ° C (high stringency uniform conditions).
- the fragment of the present protein refers to a peptide fragment comprising an amino acid partial sequence of 15 to 100 residues, preferably 15 to 50 residues of the present protein, wherein the insulin-like activity of the present protein is There is no particular limitation as long as it is held.
- a gene encoding the present protein for example, (I) a base sequence IJ encoding the amino acid sequence represented by SEQ ID NO: 2, and (II) an amino acid sequence represented by SEQ ID NO: 2 And (III) the amino acid sequence represented by SEQ ID NO: 2 in which 26 amino acids have been deleted from the amino terminus of the nucleotide sequence encoding the amino acid sequence in which one or more amino acids have been deleted, added or substituted.
- a nucleotide sequence encoding a partial amino acid sequence (that is, a nucleotide sequence encoding an amino acid sequence represented by amino acids 27 to 491 in the amino acid sequence represented by SEQ ID NO: 2); Base sequence encoding an amino acid sequence having a methionine added to its amino terminal, (V) the amino acid sequence represented by SEQ ID NO: 2 and 80% or more A base sequence encoding an amino acid sequence having sequence identity, (VI) a base sequence IJ represented by SEQ ID NO: 1, and (VII) a base sequence represented by SEQ ID NO: 1 from the 18th nucleotide to the 1493th nucleotide.
- a gene having a base sequence such as a base sequence of DNA that hybridizes under stringent conditions can be prepared by a conventional genetic engineering method (for example, Sambrook J., Frisch EF, Maniatis).
- the present protein is produced and obtained in accordance with ordinary genetic engineering methods.
- the present protein can be prepared.
- a plasmid capable of expressing the present gene in a host cell is prepared, and The present protein is obtained from a culture obtained by introducing into a cell, transforming, and then culturing the transformed host cell (transformant).
- the above-mentioned plasmid is, for example, a plasmid which contains genetic information which can be replicated in a host cell, is capable of autonomous propagation, is easily isolated and purified from the host cell, and is functional in the host cell.
- a preferable example is a vector in which a gene encoding the present protein is introduced into an expression vector having a single marker and a detectable marker.
- Various expression vectors are commercially available.
- an expression vector used for expression in Escherichia coli is an expression vector containing a promoter such as lac, trp, and tac, and these are commercially available from Pharmacia, Takara Shuzo, and the like. Restriction enzymes used to introduce a gene encoding the present protein into the expression vector are also commercially available from Takara Shuzo. If it is necessary to induce higher expression, a ribosome binding region may be linked upstream of the gene encoding the present protein. As the ribosome binding region used,
- Vectors used for expression in mammalian cells include SV40 virus promoter, site megalovirus promoter (CMV promoter), Raus Sarcoma Virus promoter-1 (RSV promoter), ⁇ -actin gene promoter, aP2 gene promoter and the like.
- CMV promoter site megalovirus promoter
- RSV promoter Raus Sarcoma Virus promoter-1
- ⁇ -actin gene promoter aP2 gene promoter and the like.
- Expression vectors containing a promoter which are commercially available from Toyobo and Takara Shuzo.
- Examples of host cells include prokaryotic or eukaryotic microbial cells, insect cells, and mammalian cells.
- E. coli and the like can be preferably mentioned from the viewpoint that large-scale preparation of the present protein is facilitated.
- the plasmid obtained as described above can be introduced into the above host cells by a conventional genetic engineering method.
- the transformant can be cultured by a conventional method used for culturing microorganisms, insect cells or mammalian cells.
- a conventional method used for culturing microorganisms for example, in the case of E. coli,
- Culture is carried out in a medium appropriately containing trace nutrients such as a suitable carbon source, nitrogen source and vitamins.
- the culture method may be any of solid culture and liquid culture, preferably aeration. Liquid culture such as stirring culture can be used.
- the present protein may be obtained by combining methods generally used for isolation and purification of general proteins. For example, the transformants obtained by the above culture are collected by centrifugation or the like, and the transformants are crushed or dissolved, if necessary, proteins are solubilized, and various methods such as ion exchange, hydrophobicity and gel filtration are performed. Purification may be performed by using a step using chromatography alone or in combination. An operation of restoring the higher-order structure of the purified protein may be further performed. Alternatively, for example, the transformant obtained by the above culture may be removed by centrifugation or the like, and the present protein may be purified from the culture supernatant in the same manner as described above.
- the present invention relates to a therapeutic or preventive agent for a sugar metabolism-related disease, which comprises, as an active ingredient, a nucleic acid molecule containing a base sequence encoding the present protein (also referred to as visfatin) or a fragment thereof.
- the nucleic acid molecule may be any one of the following nucleotide sequences: ⁇ base sequence group> (A) a nucleotide sequence encoding the amino acid sequence represented by SEQ ID NO: 2, and (B) an amino acid sequence represented by SEQ ID NO: 2.
- Base sequence 1J encoding an amino acid sequence in which one or more amino acids have been deleted, added or substituted
- C In the amino acid sequence represented by SEQ ID NO: 2, 26 amino acids have been deleted from the amino terminus A base sequence encoding a partial amino acid sequence
- D a base sequence encoding an amino acid sequence obtained by adding a methionine to the amino terminus of the amino acid sequence of (C)
- E a sequence sequence of SEQ ID NO: 2
- a nucleotide sequence encoding an amino acid sequence having 80% or more sequence identity with the amino acid sequence shown by (F), a nucleotide sequence from the 18th nucleotide to the 1493rd nucleotide in the nucleotide sequence shown by SEQ ID NO: 1;
- G a base sequence represented by the nucleotides from the 18th nucleotide to the 1493rd nucleotide in the nucleotide sequence represented by SEQ ID NO: 1 and 80% or more (preferably, 90
- a protein base encoded by S that has insulin-like activity Includes sequences, potential base sequences or fragments thereof.
- “deletion, addition or substitution of amino acid” in the above) and “80% or more sequence identity” in the above (E) and (G) are, for example, represented by SEQ ID NO: 2. It includes the processing that a protein having an amino acid sequence undergoes in a cell, a mutation that occurs naturally due to a species difference, an individual difference, a difference between tissues, and the like of an organism from which the protein is derived, and an artificial amino acid mutation.
- a conventional site-specific method for DNA encoding the amino acid sequence represented by SEQ ID NO: 2 for example, a conventional site-specific method for DNA encoding the amino acid sequence represented by SEQ ID NO: 2
- the target DNA is subjected to a mutagenesis and then the DNA is expressed by a conventional method.
- the site-directed mutagenesis method include a method using an amber mutation (gapped 'duplex method, NUCLEICACIDS RES., 12,9441-9456 (1984)), and PCR using a mutagenesis primer. Method and the like.
- the number of amino acids modified as described above is at least one residue, specifically one or several, or more.
- the number of such modifications may be within a range where the insulin-like activity of the protein can be found.
- substitution is more preferably an amino acid having similar properties such as hydrophobicity, charge, PK, and steric structure.
- substitutions include, for example, (1) glycine, alanine; (2) valine, isoleucine, leucine; (3) aspartic acid, glutamic acid, asparagine, glutamine, (4) serine, threonine; (5) lysine Arginine; (6) substitution within the group of phenylalanine and tyrosine.
- a glucose metabolism-related disease refers to a disease accompanied by abnormal glucose metabolism function in a living body, and specifically, such as diabetes, impaired glucose tolerance, and arteriosclerosis associated with persistent hyperglycemia. Diseases. That is, the glucose metabolism-related disease is not particularly limited as long as it is a disease having various disease states directly or indirectly caused by a decrease or dysfunction of insulin.
- the disease to which the therapeutic or prophylactic agent for a sugar metabolism-related disease of the present invention can be applied preferably includes a disease state in which blood glucose homeostasis is disrupted, such as diabetes.
- diabetes has the same meaning as used in the art. It is a metabolic disease that shows persistent hyperglycemia and diabetes. There are insulin dependence (type I) and insulin independence (type)). The latter is slow and does not necessarily require insulin administration.
- insulin-like activity refers to a physiological action caused by binding to insulin insulin receptor, and specifically, a hypoglycemic action, a gluconeogenesis inhibitory activity in the liver, or Glucose uptake promoting activity in muscle cells and the like.
- insulin signal transduction By binding to the insulin receptor, the ⁇ subunit, which is the intracellular domain of the insulin receptor, is autophosphorylated, and intracellular insulin-derived signal transduction occurs (hereinafter referred to as insulin signal transduction).
- insulin signal transduction include phosphorylation of insulin receptor, IRS_1, PI3 kinase or Akt.
- related to insulin metabolism refers to any factor related to secretion of insulin or glucose metabolism by insulin. Representatively, it is shown in FIG. FIG. 9 shows genes involved in insulin receptor signaling in adipocytes.
- Insulin signaling promotion activity refers to the activity of enhancing the above insulin signaling, and specifically, phosphorylation of insulin receptor, IRS-1, PI3 kinase or Akt in hepatocytes or muscle cells. It refers to an activity that enhances a response, that is, an activity that increases the phosphorylation of insulin receptor, IRS-1, PI3 kinase or Akt.
- Gluconeogenesis in hepatocytes refers to glucose biosynthesis in the liver, and refers to intracellular metabolism that biosynthesizes glucose from pyruvate via oxaloacetate. It is known that the rate-limiting step of gluconeogenesis is a reaction catalyzed by phosphoenolpyruvate carboxylase (PEPCK), and insulin is known to exhibit gluconeogenesis-inhibitory activity by suppressing the expression level of PEPCK. Has been.
- PEPCK phosphoenolpyruvate carboxylase
- the "sugar uptake promoting activity in muscle cells” refers to an activity that promotes the action of taking up glucose from outside the cell into the cell via the glucose transporter. Insulin is known to promote sugar uptake by translocating intracellularly stored GLUT4 onto cell membranes. The glucose taken in goes through a glycolysis system At the same time, ATP is produced and used as energy.
- the therapeutic or prophylactic agent for a glucose metabolism-related disease of the present invention is characterized by enhancing insulin-like activity.
- enhancing insulin-like activity includes, specifically, 1) suppressing gluconeogenesis in the liver, 2) promoting glucose uptake in muscle cells, and 3) promoting insulin signaling. , 4) lowering the blood sugar level.
- diagnosis refers to the identification of various parameters related to the type of disease, the type and degree of a disorder, a physical condition, and the like in a subject; This refers to predicting drug responsiveness, predicting changes in disease state, or determining the cause.
- treatment refers to the prevention of aggravation of a certain disease or disorder when such a condition occurs, preferably maintenance of the status quo, more preferably Means reducing, more preferably reducing.
- prophylaxis or “prevention” is the treatment of a disease or disorder before it occurs so that the condition does not occur. Say. Thus, for a disease or disorder, preventing, delaying, and preventing the worsening of the condition is included. It is understood that the method of the present invention can also be used for prophylaxis as it regenerates lung tissue.
- treatment refers to any medical action performed on a certain disease, disorder or condition, and includes actions performed to contribute to diagnosis, treatment, prevention, prognosis, and the like.
- the procedure should be performed by a medical professional, such as a physician or nurse, who has some state license. It should be noted that even if the action worsens the course of the controversial disease and is detrimental to the patient, the action itself is still a “treatment”. is there.
- the "instruction” describes a method of using or diagnosing the present invention for a doctor, a subject such as a subject who administers, or a person diagnosing (possibly the subject). It was done. Instructions can be attached to indicate how to use the diagnostic agent or the like when it is provided as a kit. This instruction describes a word indicating the procedure for administering the diagnostic agent, medicine, and the like of the present invention. This directive shall be governed by the competent authority of the country in which the invention is implemented, such as the Ministry of Health, Labor and Welfare in Japan, or the Food and Drug Administration in the United States (FD A)), and clearly indicate that it has been approved by its competent authority. Instructions are so-called package inserts, which are usually not limited to the power provided on paper, but include, for example, electronic media (eg, homepages (websites) provided on the Internet, e-mail, (SMS, PDF documents, etc.).
- electronic media eg, homepages (websites) provided on the Internet, e-mail, (SMS
- a second aspect of the present invention is a method for assaying insulin-like activity
- the measured value measured in the second step is compared with the measured value obtained when the first step and the second step are performed by using the present protein instead of the test substance, and Indicating that the surin-like activity is equal to or higher than the insulin-like activity of the above protein
- a third step of evaluating the insulin-like activity of the test substance
- the muscle cells used in the first step include muscle cells isolated from animal muscle tissue, and muscle cells (muscle tissue) forming a population having the same function and morphology. Any cells that express the insulin receptor, exhibit the activity of promoting glucose uptake in response to insulin, and function for signal transduction downstream of insulin are not particularly limited. Is also good.
- myoblasts and cells that have differentiated to form a myotube can be mentioned.
- a differentiated muscle cell is used.
- the myoblast refers to an undifferentiated cell that has acquired a base as a muscle cell, and is in a state in which multinucleation and filamentation have not occurred as in the case of differentiation.
- Differentiated muscular cells are usually multinuclear cylindrical cells up to 30 cm in diameter at 10 100 zm and have the ability to take up sugar.
- the "muscle tissue” includes, for example, soleus muscle (Soleus muscle) or long finger extensor muscle (Soleus muscle).
- Muscle cells can be isolated from skeletal muscle tissue, but cell lines such as L6 (Dainippon Pharmaceutical) and C2C12 can also be used. These are commercially available or can be easily obtained from a cell depository such as RIKEN Cell Bank. These cells have, for example, fetal bovine serum (hereinafter referred to as FBS) (manufactured by GIBCO), penicillin, and streptomycin (manufactured by GIBCO) at a final concentration of 10%, 100 units / ml, and 100 ⁇ g / ml, respectively.
- FBS fetal bovine serum
- GIBCO penicillin
- streptomycin manufactured by GIBCO
- DMEM medium Dulbecco's modified Eagle's medium (containing 4.5 g / LD_glucose and 584 mg ZL L-gnoretamine; manufactured by GIBCO)
- DMEM medium Dulbecco's modified Eagle's medium (containing 4.5 g / LD_glucose and 584 mg ZL L-gnoretamine; manufactured by GIBCO)
- DMEM medium Dulbecco's modified Eagle's medium
- DMEM medium containing 4.5 g / LD_glucose and 584 mg ZL L-gnoretamine; manufactured by GIBCO
- the fat cells used in the first step include fat cells (adipose tissue) isolated from adipose tissue of an animal, and fat cells (adipose tissue) forming a population having the same function and morphology. Any cell that expresses the insulin receptor, exhibits a glucose uptake-promoting activity in response to insulin, and functions as a signal transducer downstream of insulin is not particularly limited. It may be. Preferably, a differentiated adipocyte (eg, 3T3-L1 cell) is used.
- the characteristic of fat cells is that they contain a large amount of fat that forms adipose tissue as a group along the capillary movement as one of the loosely connected tissues, or as one of the loose connective tissues.
- Intracellular fat initially appears as a number of microdroplets, which gradually become larger and merge into one and eventually occupy most of the cell body. Intracellular fat is easily detected by sudan or osmium tetroxide. Fat cells include white fat cells and brown fat cells. Methods for identifying adipocytes are known in the art, and include, for example, the above-mentioned detection of fat, expression of an adipocyte differentiation marker, expression of adipocyte-specific cytoforce, and the like. Not limited.
- adipose tissue is a type of connective tissue, which is characteristic in that it stores lipids, and is a tissue having various other important functions. Fat accumulates in adipose tissue. Adipocytes in adipose tissue are surrounded by lattice fibers, and capillaries are densely distributed between cells. Other Tissue Forces A fat pad is one that forms an almost constant mass or tufted fat tissue independently. Adipose tissue develops, for example, in the abdomen, skeletal muscle, buttocks, chest, visceral organs, and the like. [0109] Examples of the animal from which the fat cells are derived include mammals and the like, and more specifically, humans, monkeys, mice, rats, hamsters and the like.
- the hepatocytes used in the first step express hepatocytes in which enzymes involved in gluconeogenesis and glycolysis are functioning, ie, express the insulin receptor, and suppress gluconeogenesis in response to insulin.
- Hepatic cells liver tissue isolated from the liver of an animal or hepatic cells that form a population with the same function and morphology Etc. are also included.
- the animal animal origin of the hepatocyte can be, for example, a mammal, and more specifically, a human, monkey, mouse, rat, rat, muster, or the like.
- Hepatocytes include, for example, primary cultured hepatocytes, and can be prepared by the following method. That is, a rat (Wister rat, 150 250g, abdominal incision, intestinal sideways, exposing the portal vein, inserting a 22G indwelling needle (Terumo), fixing with sutures, connecting infusion tube to tube of peristaltic pump, and perfusion Do not let out the liquid (LiverPerilision Medium) (Gibco) Connect the indwelling needle and the tube so that air does not enter from S, and at the same time incise the inferior vena cava, exsanguinate and perfuse with the perfusate kept at 37 ° C After perfusion for 10 minutes, perfuse the collagenase perfusate (LiverDigest Medium) (Gibco) maintained in a thermostat at 37 ° C for 10 minutes After the perfusion, the liver is removed and mince on a Petri dish. Washing medium (Hepatocyte
- the number of cells is counted and spread on a collagen-coated plate (Iwaki) at a density of 0.5-1.5 x 10 5 cells m 2 . After 2-3 hours, replace the medium with the same medium.
- the primary cultured hepatocytes prepared in this manner can be used for the next day.
- hepatocytes can be cultured by a usual cell culture method. For example, dexamethasone (Sig Thigh) and cAMP (Sigma) were added to DMEM medium to a final concentration of 100 nM and 50 ⁇ M, respectively. It can be cultured in a medium (hereinafter, hepatocyte medium).
- a medium hereinafter, hepatocyte medium.
- the compound used as the test substance is not particularly limited, and examples include proteins, peptides, nucleic acids, inorganic compounds, and organic compounds prepared by natural or synthetic chemistry.
- Methods for making libraries using combinatorial chemistry are well known in the art. For example, ER Felder, Chimia 1994, 48, 5 12—541; Gallop et al., J. Med. Chem.
- the concentration of the test substance to be brought into contact with cells is not particularly limited, and is usually about 0: M-about 100 ⁇ M, and preferably about 100 ⁇ M. ⁇ ⁇ 50 ⁇ ⁇ ⁇ is sufficient.
- the time for bringing the test substance into contact with the muscle cells or hepatocytes is usually about 5 minutes to 130 minutes, preferably about 10 minutes to 20 minutes.
- the test substance can be appropriately dissolved or suspended in water, a buffer such as phosphate buffer or Tris buffer, or a solvent such as ethanol, acetate, dimethyl sulfoxide or a mixture thereof.
- methods for measuring insulin-like activity include the following 1) -1 3) Examples include:
- any method may be used as long as it is a method of measuring the amount of sugar taken up in muscle cells or muscle tissue. It is possible to list methods for quantifying radiolabeled glucose. Specific examples of the method for quantifying radiolabeled gnorecose incorporated into muscle tissue or cells include (1) the amount of radiolabeled glucose incorporated into tissue using muscle tissue isolated from a living body. And (2) using differentiated muscle cells to measure the amount of radiolabeled glucose incorporated into the cells. As a method of measuring sugar uptake using muscle tissue (the former), for example, a method described in Molecular Cell, vol. 2, p. 559 (1998) can be used.
- a method for measuring the amount of gluconeogenesis in hepatocytes for example, a method described in a literature or the like can be used. More particularly, inclusion in an amount of about 3Xl0 5 cells per Ueru the H4IIE cells 12 ⁇ El plates cultured in hepatocyte medium, after the cells were Konfurue cement, except containing Gunorekosu of 5mM above Replace with the same hepatocyte culture medium as described, and culture overnight.
- a gluconeogenesis buffer (8.3 g / L DMEM_base, 4 mM L-glutamine, ImM sodium pyruvate, 3.7 g / L sodium bicarbonate, 0.9 g / L lactic acid, 100 units / mL penicillin and 100 ⁇ g / mL streptomycin) and culture the cells overnight. The next day, collect the cell supernatant, dilute appropriately, and quantify the amount of sugar (glucose) contained in the supernatant.
- kits for quantitative determination of dalcose are commercially available, and for example, F-kit Glucose (FK International Corporation) can be used.
- methods for measuring insulin signal transmission in cells include insulin receptor and its downstream molecules such as IRS-1 protein, pI3 kinase, and Akt protein. And the method of quantifying the phosphorylation amount of the enzyme.
- IRS-1 protein, PI3 kinase, and Akt protein are known, and their structures and functions are described in Molecular Medicine Vol. 36, 110-115 (1999; Nakayama Shoten).
- Examples of a method for quantifying the phosphorylation amount of these molecules include a Western blotting method using an antibody.Antibodies used in the method are commercially available from, for example, Sigma and Upstate Biotechnology, and are usually used. Can be done according to the method
- measured values when the first step and the second step are performed using the present protein instead of the test substance are defined as (i) cells (for example, fat (Cells, muscle cells or hepatocytes) and this protein such as a protein consisting of the amino acid sequence of SEQ ID NO: 2 and (ii) a measurement obtained by measuring insulin-like activity in the cells. Represents a value.
- the concentration of the present protein to be brought into contact with cells is usually about 0 lng / ml (2 pM) to about 100 / ig / ml (2 ⁇ M). Approximately lng / ml (20pM) —about 20 / ig / ml (0.4 ⁇ ) is preferred.
- the time for bringing the protein into contact with muscle cells or hepatocytes is usually about 5 minutes to 1 day, preferably about 5 minutes to 30 minutes.
- the concentration of the test substance to be brought into contact with cells is usually about 0.1 ⁇ m to about 100 ⁇ m, preferably 1 ⁇ m to 50 ⁇ m.
- the time for bringing the test substance into contact with cells is usually about 5 minutes to 11 days, preferably about 5 minutes to 30 minutes, and more preferably about 10 minutes to 30 minutes. It takes about 20 minutes.
- the blood glucose level of the mammal was measured, and the measured value was replaced with the present protein such as the protein represented by SEQ ID NO: 2 in place of the test substance.
- the test substance By comparing the blood glucose level in mammals, it can be determined whether or not the test substance exhibits a hypoglycemic effect equal to or higher than that of the present protein such as the protein shown in SEQ ID NO: 2 by half-IJ.
- the blood glucose level of the mammal is measured, and the measured value is replaced with the present protein such as the protein represented by SEQ ID NO: 2 in the mammal instead of the test substance.
- the test substance shows an insulin-like activity equal to or higher than that of the present protein such as the protein shown in SEQ ID NO: 2.
- Methods for overexpressing the present protein in mammals include, for example, methods such as transgenic and adenovirus infection, and the methods of reversal are also known in the literature.
- the test substance has 1) the ability to take up glucose into fat cells or muscle cells, 2) the ability to suppress gluconeogenesis in hepatocytes, and 3) cells (for example, fat cells, muscle cells or liver). Insulin-like activity such as the ability to activate insulin signal in cells) and the ability to lower blood glucose when administered to mammals.
- an insulin-like activity promoter specifically, 1) a sugar uptake promoter into fat cells or muscle cells, 2) a gluconeogenesis inhibitor in hepatocytes, 3) Insulin signaling promoter in cells (eg, adipocytes, muscle cells or hepatocytes), and 4) Hypoglycemic agents are selected as glucose metabolism function improvers, ie, therapeutic or preventive agents for glucose metabolism-related diseases. (The search method of the present invention).
- the insulin-like activity of the test substance is usually higher than 1.0-fold, usually 1.2-fold or more, preferably 1.
- the test substance is a candidate substance for a therapeutic or preventive agent for a glucose metabolism-related disease having an activity of improving glucose metabolic function, specifically, an activity of promoting insulin signaling. Can be sorted out.
- the sugar uptake promotion rate which indicates the ability of a test substance to promote sugar uptake, is statistically significant.
- the third aspect of the present invention relates to a method for injecting a test substance, using as an index whether the test substance promotes (induces) the expression of the present protein or a gene encoding the present protein (the present gene).
- the present invention relates to a method for assaying a surin-like activity. This will be described in detail below.
- the present invention provides a method for assaying insulin-like activity, comprising the following steps (1) and (3). That is,
- test substance may be the same as described above.
- the "cells capable of expressing the gene encoding the present protein (the present gene)" are not particularly limited as long as they express the present gene, and cells capable of expressing the present gene may be used as they are. Alternatively, cells transformed with a vector containing the present gene may be used. Examples of animal species of origin include rodent mammals such as rats, mice, and guinea pigs, dogs, sanoles, and humans.
- CH ⁇ -K1, or COS-1 or C ⁇ S_7 cells derived from African green monkey kidney.
- mammalian fat-derived cells, liver-derived cells, muscle-derived cells, and the like may be used, and examples thereof include 3T3_L1, an established hepatocyte, and H-mark G2, an established hepatocyte.
- RNA prepared from the above cells or its RNA was prepared using RNA prepared from the above cells or its RNA.
- a complementary polynucleotide transcribed therefrom a known method such as Northern blotting or RT-PCR can be used.
- a polynucleotide having at least 15 contiguous bases in the nucleotide sequence of the present protein gene and / or a complementary polynucleotide thereof as a primer or a probe the presence or absence of expression of the present gene in RNA is determined. And its expression level can be detected and measured.
- a probe or primer is prepared based on the nucleotide sequence of the present protein gene, for example, primer3 (HYPERLINK
- the primers or probes radioisotope such as 32 P, 33 P: RI
- a fluorescent substance it was transferred to a nylon membrane Puren like according to a conventional method
- the formed duplex of the primer or probe (DNA or RNA) and RNA is used as a signal derived from the primer or probe label (RI or fluorescent substance).
- the method of detection and measurement with a radiation detector (BAS-1800II, manufactured by Fuji Film) or a fluorescence detector can be listed.
- the above-mentioned probe is labeled according to the protocol and hybridized with RNA derived from cells.
- a method of detecting and measuring with Imager STORM860 can also be used.
- cDNA is prepared from cell-derived RNA according to a conventional method, and is used as a type III gene so that the region of the target protein gene can be amplified.
- a pair of primers prepared based on the sequence positive strand binding to the above cDNA (-strand) and reverse strand binding to the + strand) were hybridized with this, followed by PCR according to a conventional method, and the obtained amplification was obtained.
- a method for detecting double-stranded DNA can be exemplified.
- the amplified double-stranded DNA can be detected by a method of detecting labeled double-stranded DNA produced by performing the above PCR using primers that have been labeled with RI or a fluorescent substance in advance.
- a method may be used in which the produced double-stranded DNA is transferred to a nylon membrane or the like according to a conventional method, and the above-mentioned labeled primer is used as a probe, hybridized with the probe, and detected.
- the generated labeled double-stranded DNA product can be measured using an Agilent 2100 Bioanalyzer (manufactured by Yokogawa Analytical Systems).
- the present invention provides a method for assaying insulin-like activity, comprising the following steps (1) and (3). That is:
- test substance may be the same as described above.
- Examples of “cells capable of expressing the present protein” include the same as “cells capable of expressing a gene encoding the present protein (the present gene)” in 1) above.
- Detection and quantification of the expression level of the present protein can be determined according to a known method such as Western blotting using an antibody that recognizes the present protein.
- Western blotting after using an antibody that recognizes this protein as the primary antibody, a radioisotope such as 125 1 as the secondary antibody, fluorescent substance,-labeled with an enzyme such as horse Wa rust pel O Kishida over peptidase (HRP) Labeling is performed using an antibody that binds to the primary antibody thus obtained, and signals derived from these labeling substances are measured with a radiometer (BAI-1800II: manufactured by Fuji Film Co., Ltd.), a fluorescence detector, or the like.
- a radiometer BAI-1800II: manufactured by Fuji Film Co., Ltd.
- the antibody is not particularly limited in its form, and may be a polyclonal antibody using the present protein as an immunogen, a monoclonal antibody thereof, or an amino acid sequence constituting the present protein.
- Antibodies of the present invention also include an antibody having an antigen-binding property to a polypeptide consisting of at least contiguous, usually 8 amino acids, preferably 15 amino acids, and more preferably 20 amino acids.
- the present invention provides a method for assaying insulin-like activity, comprising the following steps (1) and (3). That is:
- test substance may be the same as the above.
- the "expression control region of the gene encoding the present protein (the present gene)" usually refers to a range of several kb to several tens of kb upstream of the chromosomal gene, for example, (i) 5'_ (5'-RACE method) (for example, it can be carried out using 5, Foil Race Core Kit (Takara Shuzo) etc.), oligocap method, S1 primer mapping, etc., to determine the 5 'end. (Ii) obtaining the 5, -upstream region using a GenomeWalker Kit (manufactured by Clontech) or the like, and measuring the promoter activity of the obtained upstream region; Can be done.
- 5'_ 5'-RACE method
- oligocap method for example, it can be carried out using 5, Foil Race Core Kit (Takara Shuzo) etc.
- S1 primer mapping etc.
- a reporter gene in which the expression control region of the present protein gene is operably linked may be prepared by a method known to those skilled in the art. That is, ⁇ Molecularized ionmg: A Laboratory Manual 2nd edition j (1989), Cold Spnng Harbor Laboratory Press ⁇ ⁇ Current Protocols In Molecular Biology J (1987), John Wiley & Sons, Inc., etc.
- the excised expression control region of the present protein gene can be incorporated into a plasmid containing a reporter gene.
- reporter genes include dalcuronidase (GUS), luciferase, chloramphenicol transacetylase (CAT), ⁇ -galatatosidase, and green fluorescent protein (GFP).
- GUS dalcuronidase
- CAT chloramphenicol transacetylase
- GFP green fluorescent protein
- a reporter gene obtained by linking the prepared expression control region of the gene of the present protein in a operable manner can be transformed into a vector that can be used in a cell into which the reporter gene is to be introduced by using a general genetic engineering technique.
- a plasmid which can be introduced into an appropriate host cell.
- a transformed cell can be obtained by culturing in a medium under selection conditions according to the reporter gene.
- a method for measuring the expression level of a reporter gene a method according to each reporter gene may be used. For example, when a luciferase gene is used as a reporter gene, after culturing the transformed cells for several days, an extract of the cells is obtained, and then the extract is reacted with luciferin and ⁇ to cause chemiluminescence, and the luminescence intensity is obtained. By measuring, the promoter activity can be detected. At this time, a commercially available luciferase reaction detection kit such as Picker Gene Dual Kit (registered trademark; manufactured by Toyo Ink) can be used.
- Picker Gene Dual Kit registered trademark; manufactured by Toyo Ink
- a cell capable of expressing a gene encoding the present protein "a cell capable of expressing the present protein”, or "a cell capable of functioning the expression control region of the present gene”
- the cells containing the reporter gene linked in a form can be contacted with a test substance while culturing them under conditions that allow the cells to grow.
- a test substance for example, the transformation of the present invention using mammalian cells as a host
- the cells can be cultured in a commercially available medium such as D_MEM, OPTI_MEM, RPMI1640 medium (manufactured by Gibco-BRL) to which serum derived from mammals such as fetal bovine serum is appropriately added.
- the "control cells not contacted with the test substance” include the “cells capable of expressing the gene encoding the present protein” and “the present protein” used in each of the first steps. And “a cell having the ability to express protein” or "a cell containing a reporter gene operably linked to the expression control region of the present gene” when not contacted with a test substance.
- the same amount of solvent (blank) as the test substance is added instead of the test substance, or a negative control substance that does not affect the expression of this gene, this protein or the reporter gene Is also included.
- the substance can be selected. That is, the expression of the present gene, the present protein or the reporter gene in the cells to which the test substance was added was 1.2 times or more, preferably 1.5 times or more, compared to the expression level in control cells to which no test substance was added. If it is more preferably twice or more, the test substance can be selected as an expression promoter (expression inducer) of the present gene or the present protein (screening method of the present invention).
- the agent for inducing the expression of the present gene or the present protein selected as described above also has an activity of improving the glucose metabolic function, specifically, a therapeutic agent for a glucose metabolism-related disease of the present invention having an insulin signal transduction promoting activity. Or it is a candidate substance for a prophylactic agent.
- the therapeutic or prophylactic agent for a sugar metabolism-related disease that can be searched for in the present invention can be a polypeptide, a nucleic acid, a sugar chain, a lipid, a small organic molecule, or a complex molecule thereof.
- the present invention is a system for assaying the modulatory activity of a test substance for insulin-like activity, which system comprises:
- nucleic acid comprising a base sequence encoding the protein
- a system is provided.
- the present invention provides a system for searching for a therapeutic or prophylactic agent for a glucose metabolism-related disease, the system comprising:
- a powerful protein or a nucleic acid comprising a base sequence encoding the protein
- a system is provided.
- the expression means, a system using cells or a system using no cells (cell-free system) can be used as described elsewhere in this specification.
- a system using cells it is preferable to use cells having the ability to express the present protein.
- any means capable of directly or indirectly identifying the expressed protein or nucleic acid can be used, for example, SDS-PAGE and the like. And subsequent protein staining (silver staining, coomassie brilliant blue, detection using antibodies (eg, Western blot, dot blot, etc.), Northern blot using specific probes, PCR using specific primers, etc. Means for detecting nucleic acids may be mentioned, but are not limited thereto.
- a screening means for selecting a candidate substance for a therapeutic or prophylactic agent for a glucose metabolism-related disease using the activity of modulating the insulin-like activity of the test substance as an index a method based on the identified regulatory activity ( Examples include, but are not limited to, a computer in which a program for selecting a test substance having an activity of a certain level or higher as a candidate substance by comparison with a control) is not limited thereto. Understand that screening means can be used.
- the regulatory activity of the insulin-like activity is enhancement of the insulin-like activity, and the enhancement can be characterized by selecting or maintaining the expression level of the present protein or the nucleic acid.
- the present invention provides a method for treating or preventing a glucose metabolism-related disease.
- This method includes: A) a protein having the following amino acid sequence: an amino acid sequence group> (a) an amino acid sequence IJ represented by SEQ ID NO: 2; (b) an amino acid sequence represented by SEQ ID NO: 2; (C) a partial amino acid sequence 1J in which 26 amino acids have been deleted from the amino terminus of the amino acid sequence represented by SEQ ID NO: 2, (d) In the amino acid sequence of (c), an amino acid sequence having a methionine added to its amino terminal, (l) an amino acid sequence having a sequence identity of 80% or more with the amino acid sequence represented by SEQ ID NO: 2, (f) ) Amino acid sequence 1J encoded by DNA having base sequence IJ represented by nucleotides 18 to 1493 in the base sequence represented by SEQ ID NO: 1, (g) SEQ ID NO: Is encoded by a DNA having a nucleotide sequence having 80% or more sequence
- / ⁇ has a nucleotide sequence having a sequence identity of at least or more, and the protein sequence encoded by the nucleotide sequence has an insulin-like activity, or ( ⁇ ) a nucleotide sequence represented by SEQ ID NO: 1.
- step i) is a step in which the protein of the present invention or a nucleic acid molecule encoding the same, or a sugar containing a factor that regulates (eg, enhances, suppresses, maintains, etc.) the insulin-like activity of the protein of the present invention.
- the present protein and its fragments, or the compounds found by the search method of the present invention can be used as such or as known pharmaceutically acceptable carriers (excipients, diluents, bulking agents, binders, (Including lubricants, flow aids, disintegrants, surfactants, etc.) and conventional additives to prepare a pharmaceutical composition.
- the pharmaceutical composition may be prepared in the form to be prepared (for oral administration such as tablets, pills, capsules, powders, granules, syrups, emulsions, suspensions, etc .; injections, drops, external preparations, suppositories, etc.) Orally or parenterally, systemically or locally, depending on parenteral administration) Can be administered.
- parenteral administration intravenous, intradermal, subcutaneous, rectal, transdermal administration and the like are possible.
- the term "pharmaceutically acceptable carrier” refers to a substance that is used when producing a medicament or an animal drug, and does not adversely affect the active ingredient.
- Such pharmaceutically acceptable carriers include, for example, antioxidants, preservatives, colorants, flavors, and diluents, emulsifiers, suspending agents, solvents, fillers, bulking agents, buffers, delivery agents, and the like. Vehicles, diluents, excipients and Z or agricultural or pharmaceutical adjuvants and the like.
- acceptable carriers, excipients, or stabilizers are non-toxic to recipients, and preferably are inert at the dosages and concentrations employed. And include: phosphates, citrates, or other organic acids; antioxidants (eg, ascorbic acid); low molecular weight polypeptides; proteins (eg, serum anolevumin, gelatin or immunoglobulins) A) hydrophilic polymers (eg, polyvinylpyrrolidone); amino acids (eg, glycine, glutamine, asparagine, arginine or lysine); monosaccharides, disaccharides and other carbohydrates (including gnorecose, mannose, or dextrin); (Eg, EDTA); sugar alcohols (eg, mannitol or sorbitol) A salt-forming counterion (eg, sodium); and / or a non-ionic surfactant (eg, Tween, pluronic or polyethylene glycol (P
- a method for producing a medicament is well known in the art, and the medicament of the present invention may contain a physiologically acceptable carrier, excipient, or stabilizer as necessary (Japanese Pharmacopoeia, 14th Edition). (See Remington's Pharmaceutica LSI Sciences, 18tn Edition, AR Gennaro, ed., Mack Publishing Company, 1990, etc.) and a cell composition having the desired degree of purity. It can be prepared and stored in a dried form, but is preferably stored in a suitable storage solution.
- the "instruction” describes a method of using the present invention or a method of diagnosing for a physician, a subject such as a subject who administers, or a person diagnosing (possibly the subject). It was done. Instructions are provided on how to use the diagnostic reagents, if provided as a kit. Can be attached to indicate. This instruction describes a word indicating the procedure for administering the diagnostic agent, medicine, and the like of the present invention. This instruction is prepared in accordance with the format prescribed by the competent authority of the country where the present invention is implemented (for example, the Ministry of Health, Labor and Welfare in Japan and the Food and Drug Administration (FDA) in the United States), and is issued by the competent authority. It is clearly stated that approval has been received.
- FDA Food and Drug Administration
- the instruction sheet is a so-called package insert, which is usually provided in a paper medium, but is not limited thereto.
- a paper medium for example, an electronic medium (for example, a homepage (website) provided on the Internet, (E-mail, SMS, PDF documents, etc.).
- the above-mentioned appropriate dosage form is prepared by adding an active ingredient (the present protein or a substance selected by the search method of the present invention or a substance thereof) to an acceptable usual carrier, excipient, binder, stabilizer, diluent, or the like.
- an acceptable buffer, solubilizing agent, isotonic agent and the like should be added.
- the dose varies depending on the type of the active ingredient, the route of administration, the subject of administration, or the age, weight, and symptoms of the patient, and cannot be specified unconditionally.
- several mg to about 2 g, preferably about 5 mg to about several tens of mg, of the active ingredient can be administered in one or several doses a day.
- an adult can administer about 0.1 mg to about 500 mg of the active ingredient in a daily dose that can be administered once or in several divided doses.
- Examples of the active ingredient substance include the present gene itself. In this case, it may be possible to integrate the gene into a vector for gene therapy and perform gene therapy. Also in these cases, the dose and administration method of the composition for gene therapy vary depending on the patient's body weight, age, symptoms and the like, and can be appropriately selected by those skilled in the art.
- the gene therapy can be performed, for example, by directly administering the present gene or a chemically modified product thereof to a mammal directly afflicted with a glucose metabolism-related disease in the same manner as this type of gene therapy. It can be carried out by a method of controlling the expression of a target gene by administering it into the body of an animal (patient), or a method of controlling the expression of a target gene by a target cell of a patient by introducing these genes into the cell. [0161] In certain embodiments, the invention can be used in conjunction with gene therapy. Gene therapy refers to therapy performed by the administration of a nucleic acid that is expressed or has the ability to express to a subject. In this embodiment of the invention, the nucleic acid produces the encoded protein, and the protein mediates a therapeutic effect.
- any method for gene therapy available in the art can be used according to the present invention.
- Exemplary methods are general reviews of methods for gene therapy, Goldspie Let al., Clinica LPharmacy 12: 488-505 (1993); Wu and Wu, Biotherapy 3: 87-95 (1991); Tolstoshev. 32: 573-596 (1993); Mulligan, Science 260: 926-932 (1993); and Morgan and Anderson, Ann. Rev. Biochem. 62: 191-217 (1993). ); May, TIBTECH 11 (5): 155-215 (1993).
- Commonly known recombinant DNA techniques used in gene therapy are described in Ausubel et al. (Eds.), Current Protocols in Molecular Biology, John Wiley & Sons, NY "993); and Kriegler, Gene Transfer and Expression, A. Laboratory Manual, Stockton Press, NY (1990).
- the amount of the composition of the present invention to be administered depends on the purpose of use, target disease (type, severity, etc.), age, weight, sex, medical history, cell morphology or type of the patient, and the like. Thus, those skilled in the art can easily determine.
- the frequency of applying the treatment method of the present invention to a subject (or patient) also depends on the purpose of use, target disease (type, severity, etc.), patient age, weight, sex, medical history, and course of treatment. In consideration of the above, a person skilled in the art can easily determine. Frequently, for example, dosing once every few months (eg, once a week, once a month). It is preferable to administer once a week to once a month while observing the progress.
- patient refers to an organism to which the treatment of the present invention is applied, and is also referred to as “subject” or “subject”.
- the patient can preferably be a human.
- the present invention provides methods of treatment, inhibition and prevention by administering to a patient an effective amount of a composition of the present invention.
- the compositions of the present invention can be substantially purified (eg, having the ability to limit its effect or to be substantially free of substances that cause unwanted side effects, including conditions). ).
- the compound or composition can be delivered encapsulated in vesicles, particularly ribosomes (Langer, Science 249: 1527-1533 (1990); Treat et al., Liposomes m the fherapy of Infectious Disease and Ancer, Lo pez—Berestein and Fidler (eds.), Liss, New York, 353, p. 365 (1989); Lo pez-Berestein, ibid., pp. 317-327; thing).
- the compound or composition may be delivered in a controlled release system.
- administering refers to giving the medicament or the like of the present invention or a pharmaceutical composition containing the same, alone or in combination with another therapeutic agent, to a host to be treated. means.
- the combination may be administered, for example, either as a mixture, either simultaneously, separately but simultaneously or concurrently; or sequentially. This includes a presentation in which the combined agents are administered together as a therapeutic mixture, and the procedures in which the combined agents are administered separately but simultaneously (eg, through separate mucous membranes to the same individual). Also included.
- “Combination” administration further includes separately administering one of the compounds or agents given first, followed by the second.
- the administration of the medicament of the present invention may be performed by any method, but it is advantageous to use needleless injection. This is because administration can be performed without imposing an excessive burden on the patient.
- the needleless syringe according to the present invention refers to a device in which a piston is moved by gas pressure or elasticity of an elastic member to eject a drug solution to skin without using a needle, and a drug component is more preferably subcutaneously. Or a medical device administered subcutaneously into cells.
- ShimaJet TM manufactured by Shimadzu Corporation
- Medi-Jector Vision TM manufactured by Elite medical
- PenJet TM manufactured by PenJet
- examples of the above-mentioned chemically modified form include, for example, phosphorothioate, phosphorodithioate, alkylphosphotriester, alkylphosphonate, alkylphosphamidate, etc.
- Derivatives that can increase stability (“Antisense RNA and DNA” WILEY—LISS, 192, pp.1-50, J. Med.Chem. 36: 1923-1937, 1993) included. These can be synthesized according to a conventional method.
- the present gene Upon administration of the present gene, it can be formulated using a commonly used stabilizer, buffer, solvent and the like.
- the polynucleotide used preferably has a length of 100 bases or more, more preferably 300 bases or more, and still more preferably 500 bases or more.
- This method also includes an in vivo method of introducing a gene into cells in a living body and an ex vivo method of introducing a gene into a cell taken out of the body and returning the cell to the body (Nikkei Science, 1994 April, pp. 20-45, Monthly Pharmaceutical Affairs, 36 (1), 23-48 (1994), Experimental Medicine Special Edition, 12 (15), all pages (1994), etc.).
- the in vivo method is preferred, and there are a viral introduction method (a method using a recombinant virus) and a non-viral introduction method (see the above-mentioned references).
- the polynucleotide of the present gene is integrated into a viral genome such as a retrovirus, an adenovirus, an adeno-associated virus, a herpes virus, a vaccinia virus, a polio virus, or a simbis virus. And a method of introducing it into a living body.
- a method using a retrovirus, an adenovirus, an adeno-associated virus or the like is particularly preferable.
- the non-viral transfer method include a ribosome method and a lipofectin method, and the ribosome method is particularly preferable.
- Other non-viral introduction methods include, for example, a microinjection method, a calcium phosphate method, and an electroporation method.
- the pharmaceutical composition for gene therapy contains the present gene or a recombinant virus containing the gene, an infected cell into which the virus has been introduced, or the like as an active ingredient.
- the administration form, administration route, and the like of the composition to a patient can be appropriately determined depending on the disease, symptom, and the like to be treated. For example, it can be administered to a vein, artery, subcutaneous, intramuscular, or the like in a suitable administration form such as an injection, or can be directly administered and introduced to a patient at a target site of a disease.
- the gene therapy composition may be administered in a form in which a viral vector containing the present gene is embedded in ribosomes or membrane-fused ribosomes (Sendai Virus (HVJ) -ribosome).
- ribosomes include suspensions, cryogens, and centrifuged concentrated cryogens. Etc. are included.
- the composition for gene therapy can be in the form of a cell culture solution infected with a virus into which a vector containing the present gene has been introduced.
- the dosage of the active ingredient in these various forms of preparation can be appropriately adjusted depending on the degree of the disease to be treated, the age and weight of the patient, and the like.
- retroviral vector containing this gene as retroviral titers can be selected from the amount range of 1 day of patient body weight lkg per about lxl0 3 pfU-lxl0 15 pili.
- about lxlO 4 cells / body-lxlO 15 cells / body may be administered.
- screening refers to a target group such as an organism, a cell, or a substance having a specific property of interest, which includes a large number of targets by a specific operation Z evaluation method. It means selecting from inside.
- an agent eg, an antibody
- polypeptide or nucleic acid molecule of the invention can be used.
- a library generated using an in silico (computer-based) system or a system using a real substance such as in vivo or in vivo may be used.
- compounds obtained by screening having a desired activity are also included in the scope of the present invention.
- the present invention also contemplates providing drugs, diagnostic agents, therapeutic agents, and the like by computer modeling based on the disclosure of the present invention.
- Candidate compounds include, for example, proteins, polypeptides, oligopeptides, peptides, polynucleotides, oligonucleotides, nucleotides, nucleic acids (eg, DNA such as cDNA, genomic DNA, and RNA such as mRNA), polysaccharides , Oligosaccharides, lipids, small organic molecules (eg, hormones, ligands, signaling substances, small organic molecules, molecules synthesized by combinatorial chemistry, small molecules that can be used as pharmaceuticals (eg, small molecule ligands) And the like, but are not limited to these complex molecules.
- proteins polypeptides, oligopeptides, peptides, polynucleotides, oligonucleotides, nucleotides, nucleic acids (eg, DNA such as cDNA, genomic DNA, and RNA such as mRNA), polysaccharides , Oligosaccharides, lipids, small organic
- a candidate compound is also referred to as a candidate drug if the candidate is a drug.
- a collection of such candidate compounds is also called a library.
- the term "compound species" refers to a compound having desired properties, such as having a specific target activity, such as a certain set of compounds. . For example, if a compound is identified in a collection of compounds that modulate activity, such compound may be referred to as a compound species. In this specification, it is simply referred to as a compound.
- the "library” refers to a certain set of compounds or the like for screening.
- the library 1 may be a set of compounds having similar properties or a set of random compounds.
- use is made of, but not limited to, a collection of compounds that are expected to have similar properties.
- the compound library used in the present invention is prepared by any means including, but not limited to, combinatorial chemistry techniques, fermentation methods, plant and cell extraction procedures, and the like. Can be obtained, or can be obtained. Methods for making combinatorial libraries are well known in the art. For example, ER Felder, Chimia 1 994, 48, 512-541; Gallop et al., J. Med. Chem. 1994, 37, 1233-1251; R. A.
- modulation when referring to glucose metabolism, means that its biological activity is altered.
- inhibiting when referring to sugar metabolism, refers to a reduction or elimination of its biological activity.
- the term “enhancement”, when referring to glucose metabolism, refers to an increase or absence of a biological activity, or the occurrence of a certain condition from a condition.
- biological test refers to a method in which a compound using an actual biological Determining whether or not it has a certain activity. Biological tests include in vitro and in vivo tests. Therefore, biological testing is an opposite concept to in silico.
- evaluation when used in screening, refers to determining whether or not a candidate compound has an ability to satisfy the requirements of such an index (for example, activity as a medicine). . Such evaluations can be performed using methods known in the art, and can be performed in silico (using a computer) or wet (performing the actual biological assay).
- screening hits can be confirmed by, for example, Atsushi using gene technology.
- the term "expression" of a gene product such as a gene, a polynucleotide, or a polypeptide means that the gene (usually in the form of DNA) or the like undergoes a certain action in vivo, and It means to be in the form of Preferably, it refers to a gene, a polynucleotide or the like, which is transcribed and translated to form a polypeptide.
- transcription and production of mRNA may also be a form of expression.
- such forms of the polypeptide may have undergone post-translational processing (eg, leader sequence excision).
- telomere As used herein, "specifically express" a gene means that the gene is at a different (preferably higher) level at a particular site or stage in an organism than at other sites or stages. It is expressed.
- Such specific expression can be realized by utilizing the characteristics of antigen-presenting cells. Therefore, the drug screening in the present invention can also be performed by confirming the specific expression of a specific index.
- the expression "only" in a certain cell means that a certain gene is expressed only in that cell, and is not substantially expressed in another kind of cell. Therefore, expression only in a certain cell includes expression specifically in that cell. In this case, it is active in adipocytes and non-specific in other cells. Almost no abnormal expression.
- “detection” or “quantification” of gene expression is achieved using an appropriate method including, for example, mRNA measurement and immunological measurement methods.
- mRNA measurement and immunological measurement methods can be done.
- the molecular biological measurement method include a Northern blot method, a dot plot method, and a PCR method.
- the immunological measurement method include, for example, an ELISA method, an RIA method, a fluorescent antibody method, a western blot method, and an immunohistochemical staining method using a microtiter plate as necessary.
- Examples of the quantification method include an ELISA method and an RIA method.
- DNA arrays are widely reviewed in (Shujunsha, edited by Cell Engineering, “DNA Microarrays and the Latest PCR Method”). Protein arrays are described in detail in Nat Genet. 2002 Dec; 32 suppl: 526-32.
- Methods for analyzing gene expression include, but are not limited to, RT-PCR, RACE, SSCP, immunoprecipitation, two-hybrid systems, in vitro translation, and the like, in addition to those described above.
- Such further analysis methods are described in, for example, Genome Analysis Experimental Method, Yusuke Nakamura Lab, Manual, Editing, Yusuke Nakamura, Yodosha (2002), and the like. Be invoked
- expression amount refers to the amount of a polypeptide or mRNA expressed in a target cell or the like. Such expression levels can be determined using the antibody of the present invention.
- the expression level of the polypeptide of the present invention at the protein level which is evaluated by any appropriate method including immunoassay such as ELISA, RIA, fluorescent antibody method, Western blot, immunohistochemical staining, etc.
- the polypeptide of the present invention evaluated by any appropriate method including molecular biological measurement methods such as Northern blotting, dot blotting, and PCR
- the expression level of the peptide at the mRNA level may be mentioned. “Change in expression level” refers to an increase in the expression level of the polypeptide of the present invention at the protein level or mRNA level, which is evaluated by any appropriate method including the above-described immunological measurement method or molecular biological measurement method. Or it means to decrease.
- the term "factor that specifically binds to a nucleic acid molecule or polypeptide” refers to the binding level of the factor to the nucleic acid molecule or polypeptide.
- factors include, for example, when the target is a nucleic acid molecule, a nucleic acid molecule having a sequence complementary to the target nucleic acid molecule, a polypeptide that binds to the target nucleic acid sequence (for example, a transcription factor
- the target is a polypeptide, antibodies, single-chain antibodies, receptor-one ligand pairs, deviations, enzyme-substrate deviations, deviations, etc.
- an agent that specifically binds for example, an agent that specifically binds to visfatin, an antibody against a specific gene product, and the like
- the term "agent” refers to any substance or other element (for example, energy such as light, radioactivity, heat, or electricity) as long as the intended purpose can be achieved. It may be.
- substances include, for example, proteins, polypeptides, oligopeptides, peptides, polynucleotides, oligonucleotides, nucleotides, nucleic acids (eg, DNA such as cDNA, genomic DNA, and RNA such as mRNA), Polysaccharides, oligosaccharides, lipids, small organic molecules (e.g., hormones, ligands, signal transducers, small organic molecules, molecules synthesized by combinatorial chemistry, small molecules that can be used as pharmaceuticals (e.g., small molecule ligands, etc.)) ) And these complex molecules, but are not limited thereto.
- a factor specific for a polypeptide typically includes a factor specific for the polypeptide. Directed antibodies or derivatives or analogs thereof (eg, single-chain antibodies), specific ligands or receptors when the polypeptide is a receptor or ligand, and substrates when the polypeptide is an enzyme. But not limited to them.
- compound means any identifiable chemical substance or molecule, including small molecules, peptides, proteins, sugars, nucleotides, or nucleic acids. However, the compounds are not limited thereto, and such compounds may be natural products or synthetic products.
- small organic molecule refers to an organic molecule having a relatively small molecular weight. Normally, the organic low molecular weight refers to those having a molecular weight of about 1,000 or less, but may be higher.
- the organic small molecule can be synthesized usually using a method known in the art or a combination thereof. Such small organic molecules may be produced by living organisms. Examples of the organic small molecule include hormones, ligands, signaling substances, organic small molecules, molecules synthesized by combinatorial chemistry, and small molecules that can be used as pharmaceuticals (eg, small molecule ligands). Not limited to.
- contacting refers to bringing a compound into physical proximity, either directly or indirectly, to a polypeptide or polynucleotide of the present invention. Means that. A polypeptide or polynucleotide can be present in many buffers, salts, solutions, and the like. Contacting includes placing the compound, including, for example, a polypeptide encoding a nucleic acid molecule or fragment thereof, in a beaker, microtiter plate, cell culture flask, or microarray (eg, a gene chip), and the like.
- the term "complementary” or “complement” is used herein to refer to the entire complementary region as is and another specific polynucleotide and Watson & Crick base pairs.
- 1 shows a sequence of a polynucleotide capable of forming a DNA.
- a first polynucleotide is considered to be complementary to a second polynucleotide if each base of the first polynucleotide is paired with its complementary base.
- the complementary bases are generally A and T (some are A and U) or C and G.
- complementary is used as a synonym for "complementary polynucleotide", “complementary nucleic acid” and “complementary nucleotide arrangement IJ". These terms are It applies to a pair of polynucleotides based solely on their sequence, and does not apply to a particular set of two polynucleotides in effect associated.
- the present invention provides a composition for regulating insulin-like activity, comprising a base sequence encoding the present protein or a fragment thereof, or the present protein, or a fragment thereof as an active ingredient.
- a composition for regulating insulin-like activity comprising a base sequence encoding the present protein or a fragment thereof, or the present protein, or a fragment thereof as an active ingredient.
- I will provide a.
- the present protein or a fragment thereof any of the preferable forms described above in the present specification can be adopted.
- the present invention also provides a method of modulating insulin-like activity, comprising providing the protein or a fragment thereof in a subject.
- the present invention relates to a method for producing a therapeutic or prophylactic agent for a disease associated with glucose metabolism, or a method for preparing a therapeutic agent or a prophylactic agent for a fragment comprising the present protein or a fragment thereof, or a base encoding the present protein.
- a composition for modulating activity Use in the manufacture of a composition for modulating activity.
- the present protein or a fragment thereof any of the preferable forms described above in this specification can be adopted.
- the gnorecose clamp method is one of the methods to evaluate insulin in peripheral tissues.
- the glucose clamp method is currently considered to be the most accurate evaluation.
- glucose is infused while monitoring blood glucose level under continuous infusion of insulin so that the blood insulin level is maintained at a constant level, and the blood glucose level is maintained at the fasting blood glucose level.
- the required glucose infusion rate is defined as the insulin metabolic rate and is a sign of insulin.
- the result of the test can be expressed as the average soil standard error.
- the significance test can be determined to be significant when the t-test is performed, for example, when the p-value is less than 0.05.
- Study design example 1 20 type 2 diabetic patients are randomly assigned to 2 groups of 10 patients each. Age, gender, body mass index, oral hypoglycemic medication, hunger between study and placebo Adjusted for differences in background factors such as blood glucose and hemoglobin A during lc
- the candidate compound is orally administered daily at a test dose three times a day for one week.
- Patients in the placebo group will receive one similar placebo tablet orally three times daily for 1 week.
- blood is collected from the patient's vascular catheter into a tube containing 1.2 mg of EDTA and 400 KIU of Aprotune (Trasylor, Bayer, Germany) on an empty stomach. Plasma collected by centrifugation was stored at -40 ° C until analysis.
- Dalcose, fructosamine and hemoglobin A in the blood are, for example, glucose lc
- the amount of insulin in plasma and the amount of C-peptide in urine were measured using commercially available kits, insulin-III (Boehringer-Mannheim, Germany) and C-peptide kit (Daiichi Kagaku, Japan), respectively.
- the amount of C-peptide in urine is calculated as an average value over two days.
- the strength of the insulin potentiating action can be evaluated by the blood glucose lowering rate when the drug is administered to KKAy mice.
- the KKAy mouse is a model animal of diabetes with insulin resistance (Japanese clinical volume 60, extra number 8, 38-44, (2002)), and a sulfonylurea-based glycemic drug for the treatment of type 2 diabetes based on the action of promoting insulin secretion. Depressants are not effective and can be used (Medical Pharmacy, Vol. 24, No. 3, 131-136, (1990)). In an oral hypoglycemic test using KKAy mice, if the blood glucose level of KKAy mice is suppressed by about 45%, the blood glucose level will be almost the same as that of normal mice. preferable.
- the measurement of the blood glucose lowering rate by an orally administered blood glucose lowering test using KKAy mice can be performed by a known method, and a preferable method is shown below.
- mice For example, six 11-week-old male mice (KKAy / Ta) are used as a group in the test. Then, as a control, blood is collected from the tail to measure the blood glucose level before the treatment. After blood collection, the biguanide derivative is dissolved at an appropriate concentration in 0.5% CMC-Na (Sodium Carboxymetyl Cellulose) solution and orally administered at a dose of 10 mL / kg. As a control, a mouse to which only the vehicle is administered is prepared. One, two, four, and six hours after drug administration, blood is collected from the tail to measure blood glucose levels. The blood glucose level is measured using a gnorecose CII-I Test Co. (Wako Pure Chemical Industries, Ltd.).
- CMC-Na Sodium Carboxymetyl Cellulose
- the blood glucose lowering rate is determined by the following equation.
- Hypoglycemic rate (%) [(AUC of control group's blood glucose level-AUC of blood glucose level of compound administration group) / AUC of control group's blood glucose level] x 100
- the AUC of the blood glucose level represents the area up to 6 hours after the drug administration with the gnorecose value 0 as the baseline in a graph in which the change in the blood glucose level after the drug administration is plotted against time.
- A blood glucose level before drug administration
- B blood glucose level 1 hour after drug administration
- C blood glucose level 2 hours after drug administration
- D blood glucose level 4 hours after drug administration
- E drug glucose level 6 o'clock
- the blood glucose AUC is given by the following formula:
- AUC of blood glucose 1 X ((A + B) / 2) + l X ((B + C) / 2) + 2 X ((C + D) / 2) + 2 X ((D + E) / 2)
- the strength of the insulin-enhancing effect was determined by administering the drug to db / db mice, a diabetes model animal exhibiting insulin resistance (Japanese clinical journal, Vol. 60, extra number 8, 38-44, (2002)). It can also be evaluated by the blood glucose lowering rate at that time.
- suppressing the blood glucose level in db / db mice by about 50% is almost the same as that in normal mice, so the hypoglycemic rate is 40% or more. More preferably, it is more preferably 50% or more.
- the measurement of the blood glucose lowering rate by the glucose tolerance test of oral administration using db / db mice is performed by a known method. Preferred methods are described below. First, 11-17 week old female mice (C57BLKS / J_m + / + Lepr / db> (db / db)) are fasted for 18-24 hours. At this time, use 5-6 animals as a group for the test. Blood is collected from the tail to measure pre-treatment blood glucose levels as a control. After blood collection, the biguanide derivative is dissolved at an appropriate concentration in phosphate buffered saline and administered subcutaneously at a dose of 5 ml / kg.
- a mouse to which only the solvent is administered is prepared.
- gnorecose is orally administered at a dose of 3 g / 6 ml / kg, and an oral glucose tolerance test is performed.
- Blood is collected from the tail at 30 minutes, 1 hour, and 2 hours after glucose administration to measure blood glucose.
- the blood glucose level is measured using New Blood 'Sugar Test (Roche's Diagnostics Co., Ltd.)' or Gunorecose CII I-Test Co. (Wako Pure Chemical Industries, Ltd.).
- the blood glucose lowering rate can be calculated from the following equation.
- Hypoglycemic rate (%) [(AUC of elevated blood glucose in vehicle-administered group-AUC of elevated blood glucose in compound-administered group) AUC of elevated blood glucose in vehicle administered group] X 100
- the AUC of the blood glucose elevation value is the change in blood glucose level after administration of gnorecose with respect to time.
- the plotted graph shows the area of the increased portion up to 2 hours after the administration of darcos, using the blood glucose level before glucose administration as a baseline.
- A blood glucose before glucose administration
- B blood glucose 30 minutes after glucose administration
- C blood glucose 1 hour after glucose administration
- D blood glucose 2 hours after glucose administration
- the AUC for elevated blood glucose is calculated using the following formula:
- AUC of blood glucose elevation 0.5 X ((A + B) / 2-A) + 0.5 X ((B + C) / 2-A) + 1 X (
- the measurement of the blood glucose lowering rate and the blood lactate level by the oral glucose tolerance test can be performed by a known method, and the former measurement can be performed by the above-described method.
- the latter measurement can be suitably performed by the following method. That is, first, 11- to 17-week-old female mice (C57BLKSZJ-m + Z + Lepr-db> (dbZdb)) are fasted for 18-24 hours. At this time, use 5-6 animals as a group for the test. As a control, blood is collected from the tail to measure the blood lactate level before treatment.
- the biguanide derivative is dissolved at an appropriate concentration in phosphate buffered saline and administered subcutaneously at a dose of 5 ml / kg.
- a mouse to which only the solvent is administered is prepared.
- 30 minutes after the administration of the compound or vehicle, gnorecose is orally administered at a dose of 3 g / 6 ml / kg, and an oral glucose tolerance test is performed.
- Blood is collected from the tail at 30 minutes, 1 hour, and 2 hours after glucose administration to measure blood lactate.
- the blood lactate level can be measured by using “Asu Riki 'Sigma” (manufactured by Sigma Diagnostics Co., Ltd.).
- the blood lactate increase rate is calculated by the following formula:
- Increase rate of blood lactate (%) [(AUC of blood lactate in compound administration group-AUC of blood lactate in solvent administration group) AUC of blood lactate in solvent administration group] X 100
- the AUC of blood lactate value represents the area up to 2 hours after glucose administration in a graph in which the change in blood lactate value after administration of gnorecose is plotted against time.
- £ blood lactate before gnorecose administration
- F blood lactate 30 minutes after glucose administration
- G blood lactate 1 hour after glucose administration
- H blood lactate 2 hours after glucose administration.
- blood The AUC of blood lactate, given the medium lactate level is given by the following formula:
- the present invention provides a transformant (for example, an organism, organ, tissue or cell) into which a nucleotide sequence encoding the present protein or a variant thereof has been introduced.
- a transformant for example, an organism, organ, tissue or cell
- Such a transformant is also called a transgenic animal if it is an animal.
- Such a transformant may be useful in the search for a factor that regulates insulin-like activity, a therapeutic or prophylactic agent for a disease associated with glucose metabolism.
- Various methods are known in the art for producing transgenic animals. For example, in the case of producing transgenic mice, general production techniques are described in International Publication No. 01/13150. Inst. Cancer Res.). U.S. Pat. No.
- transgenic (including knockout and knockin) animals through homologous recombination of embryonic stem (ES) cells.
- efficient selection of recombinants is achieved by, for example, positive selection using the neomycin resistance gene and negative selection using the HSV thymidine kinase gene or diphtheria toxin gene.
- Selection of homologous recombinants is also performed by PCR or Southern blotting. In other words, a part of the target gene is replaced with a neomycin resistance gene for positive selection, etc., and a targeting vector having the HSVTK gene, etc. for negative selection ligated to the end of the target gene, and transferred to ES cells by electoporation.
- the obtained recombinant ES cells are mixed with normal embryos by the scutellum injection method or the assembly chimera method to produce chimeric mice of ES cells and host embryos .
- blastocyst injection ES cells are injected into blastocysts with a glass pipette.
- assembly chimera method a mass of ES cells is adhered to an 8-cell stage embryo from which the zona pellucida has been removed.
- the blastocyst into which the ES cells have been introduced is transplanted into the uterus of a surrogate mother who has been pseudopregnant to obtain a chimeric mouse.
- ES cells Since ES cells have totipotency, they can be differentiated into all kinds of cells, including germ cells, in vivo.
- mice having heterologous ES cell chromosomes are obtained, and when these mice are crossed with each other, transgenic mice having homologous modified chromosomes of ES cells are obtained. Is obtained.
- transgenic mice homozygous for the modified chromosome from the obtained chimeric mice male chimeric mice and female wild-type mice were bred to produce F1 generation heterozygous mice. Male and female heterozygous mice are bred to select F2 generation homozygous mice.
- Whether or not the desired gene mutation has been introduced into each generation of F1 and F2 can be determined by methods commonly used in the art, such as Southern blotting, PCR, and decoding of the base sequence, as in the case of recombinant ES cells. Can be analyzed using
- Cre can be expressed in adults using the ability to breed with a transgenic mouse having the Cre gene or a viral vector having the Cre gene.
- the promoter of the present invention highly expresses a gene in an adipocyte-specific manner. Therefore, the use of the promoter of the present invention makes it possible to express Cre in an adipocyte-specific manner. Therefore, it is possible to disrupt or mutate the target gene only in adipocytes without affecting other tissues. This is considered to contribute greatly to the function analysis of adipocytes, whose importance has been attracting increasing attention in recent years. For other organisms, transgenic organisms can be produced using the same mechanism.
- a new fat site which is preferentially produced in human visceral visceral fat, was intensively searched for and found to accumulate in metabolic diseases.
- 8800 polymerase chain reaction (PCR) products were searched comparing subcutaneous and visceral fat obtained from two volunteer women. A total of 31 bands were exclusively detected in visceral fat (Fig. La).
- Fig. La When used as a probe for Northern plots, one of these cDNAs was more abundantly expressed in visceral fat than subcutaneous fat (Fig. Lb).
- PBEF B cell precursor colony promoting factor
- PBEF mRNA expression was It was markedly increased by the tendon ( Figure ld, upper).
- the guanidine thiosinate / cesium chloride method (Chirgwin, J. ⁇ et al., Biochemistry, 18) was used from human abdominal adipose tissue to isolate visfatin for use in the following experiments. , 5294, 1979), and mixed with the oligo dT primer attached to the cDNA synthesis kit (Takara Shuzo) in the presence of ImM dNTP.
- a single-stranded cDNA was synthesized by adding 50 units of MMTV reverse transcriptase (Takara Shuzo) and keeping the mixture at room temperature for 10 minutes, then at 42 ° C for 15 minutes, and further at 99 ° C for 5 minutes.
- the obtained PCR reaction product was subjected to 1% agarose gel electrophoresis (electrophoresis buffer; Tris-borate buffer (manufactured by Nacalai Tester)), a DNA band of about 1.5 kbp was cut out from the gel, and the DNA band was cut out from Sambrook, J., Fntsch, EF, Mamatis, T .: "Molecular Cloning
- the plasmid was cloned into the Hindi site of plasmid vector pUC118 (Takara Shuzo) according to the method described in Second Edition J, Cold Spring Harbor Laboratory Press (1989).
- the nucleotide sequence of the cloned DNA was determined by using a TaqDye Primer Cycle Sequencing Kit and a Taq Dye Deoxy Terminator Cycle Sequencing Kit (manufactured by Pfidno Biosystems) by a DNA sequencer of type 373A manufactured by Applied Biosystems.
- the DNA consisted of the nucleotide sequence represented by SEQ ID NO: 1, and the nucleotide sequence encoded the amino acid sequence represented by SEQ ID NO: 2.
- Example 3 Preparation of an expression plasmid for a protein consisting of the amino acid sequence represented by SEQ ID NO: 2
- the expression plasmid for producing a protein having an amino acid sequence represented by the first amino acid to the 491st amino acid in the amino acid sequence represented by SEQ ID NO: 2 was amplified and isolated in Example 2.
- the expression plasmid thus prepared was used to transform monkey-derived COS1 cells (manufactured by ATCC) in the same manner as described in the protocol attached to the reagent using Fugene reagent (manufactured by Boehringer).
- Example 4 Preparation of protein: Preparation of protein sample consisting of amino acid sequence represented by SEQ ID NO: 2)
- the protein having the amino acid sequence represented by the first amino acid to the 491st amino acid was obtained by transforming the monkey-derived COS1 cells transformed in Example 3 into penicillin, streptomycin (GIBCO) was added to a final concentration of 100 units / ml and 100 ⁇ g / ml, respectively, and the protein was secreted into the medium by culturing in ⁇ - ⁇ medium (GIBCO). Cell culture supernatants from day 2 to day 8 were collected.
- the culture supernatant was filtered through an ultrafiltration membrane, and sequentially supplied to DEAEs-marked harose, ANX-Sepharose, Octyl-Sepharose, and Mono_Q columns (all manufactured by Amersham Pharmacia) for purification.
- the protein preparation finally obtained was a single band in silver staining.
- Dulbecco's modified Eagle obtained by adding awakened rat L6 cells to FBS (GIBC ⁇ ), penicillin, and streptomycin (GIBCO) at final concentrations of 10%, 100 units / ml and 100 ⁇ g / ml, respectively.
- a medium containing 4.5 g / LD_glucose and 584 mg ZL L_gnoletamine; manufactured by GIBCO) (hereinafter referred to as FBS-containing medium) (hereinafter referred to as FBS-containing medium) is suspended in 30 ml, and the suspension is suspended in a cell culture flask (T150 for adherent cells; Iwaki Glass) And cultured overnight at 37 ° C in the presence of 5% CO. Cells were diluted with 15 mL of phosphate buffer (0.20 g / L KC1, 0.2
- EDTA'4Na trypsin monosodium ethylenediaminetetraacetate
- Example 5 The same operation was carried out except that a phosphate buffer was added instead of the protein sample to the well containing the test cells obtained in Example 1 (1), and the total radioactivity was measured (hereinafter referred to as measurement. From these measured values, the sugar uptake promoting rate of the present protein was calculated from the measured values according to the following formula.
- Example 6 Measurement of insulin signal activation rate of this protein in muscle cells
- L6 cells awakened in Example 5 (1) were spread on a 90 cm dish, and confluent in a medium containing FBS. Cultured until After removing the medium, the cells were washed with a phosphate buffer, cultured in a serum-free medium for 20 hours, and then the medium was removed again. The cells were incubated at 37 ° C for 10 minutes in a serum-free medium containing 100 ng / mL of the present protein preparation obtained in Example 3. The reaction was stopped by removing the medium, and the cells were washed twice with a phosphate buffer previously cooled with ice.
- ImL of cell disruption buffer (20 mM Tris-HCl (pH 7.4), 2 mM CaCl, ImM MgCl, 140 mM NaCl, 1% NP-40, 2 ⁇ g / m
- ⁇ 4 ⁇ cells purchased from Dainippon Pharmaceutical
- FBS penicillin, streptomycin, cAMP (Sigma), and dexamethasone (Sigma) each at a final concentration of 10. /.
- Dulbecco's modified Eagle's medium containing 4.5 g / L glucose and 584 mg ZLL-glutamine; GIBCO
- GIBCO Dulbecco's modified Eagle's medium
- Example 5 The cells were recovered from the culture vessel by the method described in, Makikomi 12 ⁇ El plates at a concentration of 3XL 0 5 cells Z Ueru, 37. C, and cultured in the presence of 5% CO. The culture was continued until the cells became confluent. The cells were washed with a phosphate buffer, replaced with a medium for hepatocytes containing 5 mM gnorecose, and cultured for 24 hours.
- Example 4 The cells were washed twice with a phosphate buffer, and the present protein preparation obtained in Example 4 lmL gluconeogenesis buffer containing 0-InM (8.3 g / L DMEM base, 4 mM L-glutamine, ImM Sodium pyruvate, 3.7 g / L sodium bicarbonate, 0.9 g / L lactic acid, 100 units / mL penicillin, and 100 ⁇ g / mh streptomycin, filtered through a 0.22 ⁇ m filter) The cells were cultured overnight, and the cell supernatant was collected the next day. Using F-kit Glucose (IK International), the concentration of sugar (glucose) contained in the culture supernatant collected according to the protocol was measured.
- 0-InM 8.3 g / L DMEM base, 4 mM L-glutamine, ImM Sodium pyruvate, 3.7 g / L sodium bicarbonate, 0.9 g /
- the sugar concentration in the medium when the protein sample was not added that is, the concentration of each protein of the present protein when the time of 4.01 fmolZ cells, Z time, was 100%, which is the amount of sugar production.
- the amount of gluconeogenesis due to is 0.01%, 0.1% and 0.2%, respectively, and is 98%, 32% and 3%, respectively.
- This protein inhibits hepatic gluconeogenesis in a concentration-dependent manner. That was confirmed.
- the values of 0.01 nM, 0.1 InM and InM insulin were 82%, 20% and 4%, respectively.
- ⁇ 4 ⁇ cells (manufactured by Dainippon Pharmaceutical Co., Ltd.) were cultured in a medium for hepatocytes in the same manner as in Example 7, spread into a 90 mm petri dish, and cultured until the cells became confluent. After removing the medium, the cells were washed with a phosphate buffer, cultured in a hepatocyte medium without FBS (hereinafter, serum-free hepatocyte medium) for 20 hours, and then the medium was removed again. Furthermore, the cells were incubated at 37 ° C for 10 minutes in a serum-free hepatocyte medium containing lOOngZmL of the present protein preparation. The reaction was stopped by removing the medium, and the cells were washed twice with a phosphate buffer pre-cooled on ice. Subsequent operations were performed by the method described in Example 6, and each phosphorylated molecule was detected and quantified.
- Example 1 the DNA amplified and isolated in Example 1, ie, the recombinant virus particles having the gene encoding the present protein, was obtained by using the adenovirus expression vector kit (Takara Shuzo) according to the method described in the kit. It was produced according to.
- a virus particle containing a galatatosidase gene attached to a kit was used as a negative control having no amplified and isolated DNA in Example 1, a virus particle containing a galatatosidase gene attached to a kit was used.
- HEK293 cells American Type Culture Collection
- the obtained partially purified virus solution was diluted with 10 mM Tris_HCl and ImM EDTA (pH 8.0), and subjected to CsCl density gradient ultracentrifugation (100,000 gxl6 hours) to collect the virus solution layer again.
- the purified virus solution obtained was dialyzed against 10 mM Tris-HCl (pH 8.0), 2 mM MgC12, and 5% gnorecose, and stored frozen at -80 ° C.
- plasma glucose levels in (+ / _) mice were modestly higher than wild-type at 60 and 120 minutes after darcose overload (FIG. 6h).
- the sensitivity of the insulin tolerance test was examined in (+/-) and wild-type mice. The results of these analyzes indicate that, like insulin, visfatin also plays a role in plasma glucose levels.
- visfatin induced triglyceride accumulation in adipocyte precursors from both cells and accelerated triglyceride synthesis from gnorecose ( Figure 7e).
- Visfatin treatment also included peroxisome proliferator-activated receptor (PPAR), CCAAT enhancer binding protein (C / EBP) _ ct, fatty acid synthesis (FAS), diasylglycerol monoacinole transferase (DGAT) -1, fat Expression of genes encoding fat markers such as P2 (aP2) and adiponectin was also induced (FIG. 7f). Similar adipogenesis-inducing effects were seen for visfatin for 3T3-L1 cells and 3T3-F442 cells.
- PPAR peroxisome proliferator-activated receptor
- C / EBP CCAAT enhancer binding protein
- FAS fatty acid synthesis
- DGAT diasylglycerol monoacinole transferase
- visfatin plays a role in the insulin signaling pathway
- Intravenous injection of visfatin in mice induced tyrosine phosphorylation of insulin receptor (IR), insulin receptor substrate (IRS) _1 and IRS-2 in the liver to a similar extent as insulin injection (FIG. 8a).
- Visfatin treatment of cultured 3T3-F442 adipocytes results in the phosphorylation of IR, IRS-1 and IRS-2, and the binding of phosphatidylinositol _3_kinase (PI3K) to IRS-1 and IRS-2 , And phosphorylation of Akt and MAP kinase.
- PI3K phosphatidylinositol _3_kinase
- visfatin shares properties with insulin at in vivo and in vitro levels.
- substances capable of modulating insulin-like activity are screened using Reporter Gene Atssay.
- PBS Phosphate buffered saline
- Lysis solution 25 mM Tris (7.5), 2 mM dithiothreitol (DTT), 10% glycerol, 1% TritonX-100; Luciferin mix: 20 mM Tricine (Tricine) / 1. 07 mM (MgCO) Mg (OH) _5H 0 / 2.67mM MgSO / 0. ImM EDTA / 33.
- Hepatocytes ⁇ 4 ⁇ , HepG2
- These cells are optionally placed in Dulbecco's modified Eagle's medium 10. Incubate with / ⁇ ⁇ fetal serum.
- Luciferase is an enzyme that produces fluorescence (about 560 nm).
- a plasmid containing a visfatin-encoded nucleic acid sequence (SEQ ID NO: 1) and a reporter plasmid (noresiferase reporter) are simultaneously forcibly expressed in the cells, and the reporter activity is measured.
- SEQ ID NO: 1 a visfatin-encoded nucleic acid sequence
- reporter plasmid noresiferase reporter
- Example 15 Automation
- the screening performed in Example 14 can be automated using a robot.
- Beckman Coulter's Biomek series can be used to construct a system using a microplate
- Zymark's Staccato Mini-System series can be used to construct a system.
- the lead compound thus obtained can be used in animal experiments. Alternatively, other compounds can be designed based on such a lead compound.
- Examples 14, 15 etc. compounds identified as having the potential to activate visfatin were administered to animals such as mice, rats or monkeys to specifically target adipose tissue, muscle cells or hepatocytes. Screen for compounds that reduce visfatin mRNA expression or protein levels.
- adipocyte differentiation is actually performed in an animal; diabetes; hyperglycinemia; low glucose tolerance; insulin resistance; obesity; lipopathy; dyslipidemia (dyslipidemia); Hypertriglyceridemia; hypercholesterolemia; low HDL level; high LDL level; atherosclerosis; vascular stenosis; irritable bowel syndrome; inflammatory bowel disease; Crohn's disease; intestinal ulcer; Substances that act on diseases such as knee inflammation, abdominal obesity, neurodegenerative disease, retinopathy, psoriasis, metabolic syndrome, ovarian hyperandrogenesis, and the like.
- Example 16 Among the substances that actually showed a test effect in Example 16, those that showed no toxicity are administered to a human subject to observe the effect on glucose metabolism. Here, clinical tests are performed using energy metabolism, body weight, fat mass, body fat percentage, blood glucose level, and other indicators as indexes. This makes it possible to determine whether or not the compound identified as the lead compound in Example 16 is actually effective in the above-mentioned diseases.
- the present invention is useful in the pharmaceutical industry and the like for the treatment and prevention of sugar metabolism diseases such as diabetes, and for research and development of such medicines.
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JPH08505373A (ja) * | 1992-11-20 | 1996-06-11 | アムジエン・インコーポレーテツド | B細胞前駆体刺激因子 |
WO2000062073A1 (en) * | 1999-04-12 | 2000-10-19 | Sumitomo Chemical Company, Limited | Method for analyzing the amount of intraabdominal adipose tissue |
WO2002010772A1 (fr) * | 2000-07-31 | 2002-02-07 | Sumitomo Chemical Company, Limited | Procede d'analyse de la teneur en graisses accumulees dans des adipocytes |
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JPH08505373A (ja) * | 1992-11-20 | 1996-06-11 | アムジエン・インコーポレーテツド | B細胞前駆体刺激因子 |
WO2000062073A1 (en) * | 1999-04-12 | 2000-10-19 | Sumitomo Chemical Company, Limited | Method for analyzing the amount of intraabdominal adipose tissue |
WO2002010772A1 (fr) * | 2000-07-31 | 2002-02-07 | Sumitomo Chemical Company, Limited | Procede d'analyse de la teneur en graisses accumulees dans des adipocytes |
Non-Patent Citations (3)
Title |
---|
FUKUHARA A. ET AL: "Visfatin: A Protein Secreted by Visceral Fat That Mimics the Effects of Insulin", SCIENCE, vol. 307, no. 5708, 21 January 2005 (2005-01-21), pages 426 - 430, XP002989092 * |
HUG C. ET AL: "Medicine. Visfatin: a new adipokine", SCIENCE, vol. 307, no. 5708, 21 January 2005 (2005-01-21), pages 366 - 367, XP002989093 * |
SAMAL B. ET AL: "Cloning and characterization of the cDNA encoding a novel human pre-B-cell colony-enhancing factor", MOLECULAR AND CELLULAR BIOLOGY, vol. 14, no. 2, 1994, pages 1431 - 1437, XP002947539 * |
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