WO2010131491A1 - 肥満素因の評価方法及びキット、並びに、抗肥満薬及びそのスクリーニング方法、非ヒト動物、脂肪組織、脂肪細胞、トランスジェニックマウス作成方法、抗原、抗体 - Google Patents
肥満素因の評価方法及びキット、並びに、抗肥満薬及びそのスクリーニング方法、非ヒト動物、脂肪組織、脂肪細胞、トランスジェニックマウス作成方法、抗原、抗体 Download PDFInfo
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Definitions
- the present invention relates to a method for evaluating whether or not there is a predisposition to cause a condition or disease caused by obesity or obesity, a kit for performing the method, and a condition or disease caused by obesity or obesity.
- An anti-obesity drug having a therapeutic action, a screening method thereof, a non-human animal in which a gene related thereto is deleted or over-stable expressed, its adipose tissue or adipocyte, a method for producing a transgenic mouse of a related gene, an antigen, Relates to antibodies.
- Obesity causes various diseases such as metabolic syndrome, and damages ADL and QOL of people.
- Obesity is a condition in which the amount of body fat is excessively increased.
- the obese population has been steadily increasing, and medical costs for complications associated therewith are also increasing. This suggests that early treatment is important, but a marker for predicting obesity early has not yet been obtained.
- Patent Document 1 includes PAPPA, PAM, pf20, DNAH11, PKD1, KCNMA1, PKHD1, NRXN3, EPHA7, ROS1, FKSG87, C3orf6, TOX, DLG2, MDS1, FABP2, EFA6R, FLJ20115, ClOR10, CHL1, BIC1, D It is disclosed to detect a gene encoding a protein selected from ADARB2, A2BP1, MGC4309, PIGR, PCSK7, and HSF2, or a polymorphism closely linked thereto.
- Patent Document 2 discloses detecting a polymorphism of a frizz-related protein (FRZB) gene.
- Patent Document 3 discloses detecting a polymorphism in the 5 ′ region of the gad2 gene.
- Patent Document 4 discloses detecting an SNP of ENPP1.
- SNPs single nucleotide polymorphisms
- the present invention provides a method for evaluating whether obesity or a predisposition to cause a condition or disease caused by obesity as an effective means extending the knowledge of Patent Document 5, and a kit for carrying out the method , As well as anti-obesity drugs having an action of preventing or treating obesity or a condition or disease caused by obesity, a screening method thereof, a non-human animal deficient in a gene related thereto, and adipose tissue or adipocytes thereof The task is to do.
- the method for evaluating a predisposition to obesity is a method for evaluating whether or not a predisposition to cause a condition or a disease caused by obesity or obesity is obtained, wherein a sample containing a human gene of a subject is used and an intron of SLC25A24 gene
- the method comprises a step of detecting a copy number polymorphism (CNV) in 1, or a genetic polymorphism in a linkage disequilibrium relationship therewith.
- CNV copy number polymorphism
- CNV in intron 1 of the SLC25A24 gene when CNV in intron 1 of the SLC25A24 gene is 0, it may be evaluated that it has a predisposition for causing obesity or a condition or disease caused by obesity.
- BAC array CGH method For detection of gene polymorphism, BAC array CGH method, FISH method, RFLP method, PCR-SSCP method, allele-specific oligonucleotide hybridization method, direct sequencing method, TaqMan PCR method, invader method, MALDI-TOF / MS method
- molecular beacon method Any of molecular beacon method, RCA method, UCAN method, nucleic acid hybridization method using DNA chip or DNA microarray may be used.
- Japanese subjects may be used as subjects.
- the evaluation kit for obesity predisposition is a kit for evaluating whether or not a predisposition to cause a condition or disease caused by obesity or obesity, comprising: And a means for detecting CNV in intron 1 of the SLC25A24 gene, or a gene polymorphism in a linkage disequilibrium relationship with the sample.
- the screening method for an anti-obesity drug of the present invention comprises a step of evaluating whether a test substance can suppress or regulate the expression of SLC25A24 gene, or whether it can inhibit or regulate its activity, A test substance capable of suppressing or regulating the expression of SLC25A24 gene, inhibiting or regulating its activity, and consequently preventing or treating a condition or disease caused by obesity or obesity And selecting as an effective substance for preventing or treating a condition or disease.
- a step of administering a test substance to a non-human animal including a step of administering a test substance to a non-human animal, a step of measuring obesity in the non-human animal to which the test substance is administered, and a step of selecting a test substance that reduces the degree of obesity as an active substance May be.
- the anti-obesity drug of the present invention is an anti-obesity drug having an action of preventing or treating obesity or a condition or disease caused by obesity, and suppresses or regulates the expression of SLC25A24 gene, or its activity It contains a drug that inhibits or regulates the activity of the adipocytes, and has an action of suppressing adipocyte differentiation.
- non-human animal of the present invention is characterized in that the SLC25A24 gene is deleted.
- the non-human animal of the present invention is characterized in that the SLC25A24 gene is overexpressed or stably expressed.
- It may be a non-human animal in which adipocyte differentiation is suppressed and is in an anti-obesity state.
- the method for producing a transgenic mouse of the present invention is a method for producing a transgenic mouse in which weight gain is suppressed as compared with a wild type mouse, and gene transfer is carried out using a plasmid in which the SLC25A24 gene is incorporated into a vector. And overexpressing or stably expressing the SLC25A24 gene.
- the SLC25A24 protein antibody of the present invention is an antibody that specifically reacts with the SLC25A24 protein, and was obtained by using an antigen having EWRDYFLFNPVTDIEE as an epitope among amino acid sequences constituting the SLC25A24 protein. It is characterized by.
- the antigen for producing an SLC25A24 protein antibody of the present invention is an antigen used for producing an antibody that specifically reacts with the SLC25A24 protein, and has an EWRDYFLFNPVTDIEE as an epitope among amino acid sequences constituting the SLC25A24 protein. To do.
- the method and kit for assessing obesity predisposition according to the present invention effectively evaluates whether obesity or a predisposition to cause a condition or disease caused by obesity contributes to prevention or treatment.
- the anti-obesity drug according to the present invention contains an agent that suppresses or regulates the expression of the SLC25A24 gene, or inhibits or regulates the activity, and suppresses adipocyte differentiation.
- a condition or disease caused by obesity can be prevented or treated. Therefore, it is useful for the prevention and treatment of diabetes, hyperlipidemia, hypertension, hyperinsulinemia, arteriosclerosis, hyperlipidemia, hypertension, polycystic ovary syndrome and the like.
- the non-human animal according to the present invention is useful as an anti-obesity model animal or an obesity model animal.
- the adipose tissue or adipocyte according to the present invention is useful as a model tissue or cell.
- the method for producing a transgenic mouse according to the present invention is useful as a method for producing a model animal.
- the antigen or antibody according to the present invention is useful for confirming deletion of the SLC25A24 protein.
- Patent Document 5 As an extension of the knowledge disclosed in Patent Document 5, the present inventor also found a correlation between CNV in intron 1 of the SLC25A24 gene and body fat mass. It was also confirmed that there was a linkage disequilibrium relationship between the CNV and SNP. Subsequently, a demonstration experiment using a mouse was performed to arrive at the present invention. Hereinafter, the present invention will be described with reference to examples and demonstration experiments which are the basis of the present invention. Embodiments of the present invention are not limited to the following examples, and conventionally known techniques such as Patent Document 5 can be used as appropriate.
- FIG. 1 is a graph showing the relationship between CNV and body fat mass in intron 1 of the SLC25A24 gene.
- the body fat percentage (% FAT) was measured by the DEXA method in 527 postmenopausal women.
- DNA was collected from the peripheral blood of the subject and the number of CNV copies present in intron 1 (chromosome 108534690-108535300) of the SLC25A24 gene was determined.
- CNV is detected by qPCR analysis using TaqMan probe and primer (FAM (label) targeting SLC25A24 gene intron 1 and RNaseP (VIC label ABI; 4316844) as a reference gene for 5 ng of the target gDNA.
- FAM label
- RNaseP VIC label ABI; 4316844
- the SLC25A24-RNaseP deltaCt value is calculated, and the deltaCt value is similarly calculated for the reference gDNA HapMap NA19000 5 ng.
- the deltaCt value is calculated from the deltaCt value of the target gDNA-the deltaCt value of the reference gDNA.
- the copy number was determined by principal component analysis (Principal Component Analysis) using a mixed Gaussian model using a value obtained by converting Log2 from the deltaCt value of the target specimen.
- a genetic polymorphism that is in a linkage disequilibrium relationship with CNV may be detected and used to assess whether it has a predisposition to cause obesity or a condition or disease caused by obesity.
- genotyping and calculating D ′ and r2 from genotype can be defined as linkage disequilibrium.
- CNV refers to a genomic region in which the number of copies per cell differs among individuals in a certain population.
- Other known polymorphisms of genomic DNA include SNP, VNTR, and microsatellite polymorphism.
- CNV has a relatively high copy number and a low copy number compared to the control, and is called duplication and deletion, respectively.
- cells such as humans have 2 copies of genes, one from the paternal side and the other from the maternal side, but depending on the individual, there are only 1 copy per cell or 3 copies or more.
- Such gene duplications and deletions are frequently found in the human genome with normal traits, and CNV may be widely involved in human traits including disease susceptibility and drug susceptibility. Has been suggested.
- CNV and a method for detecting a genetic polymorphism in a linkage disequilibrium relationship with human blood or tissue as a material BAC array CGH method, FISH method, RFLP method, PCR-SSCP method, allele-specific oligo Nucleotide hybridization method, direct sequencing method, TaqMan PCR method, invader method, MALDI-TOF / MS method, molecular beacon method, RCA method, UCAN method, nucleic acid hybridization method using DNA chip or DNA microarray, etc. can be used.
- the BAC array CGH method is a comparative genomic hybridization method using an array in which BAC clones made of DNA fragments prepared by Macrogen's KOGENOME Project are spotted on a glass slide, and the test DNA and normal cells This is a method for detecting CNV by labeling each derived DNA with a different fluorescent dye and comparing the fluorescence intensities.
- a commercially available array can be used as an array spotted with BAC clones.
- Macrogen's MAC Array registered trademark
- SPECTRAL GENOMICS SpectralChip
- SpectralChip registered trademark
- the DNA to be reacted with the BAC clone is labeled by a random prime method or the like.
- the labeled DNA solution is washed with sodium acetate or ethanol to remove the labeling substance that has not been incorporated into the DNA.
- the purified labeled DNA is dissolved in the hybridization solution.
- the DNA is thermally denatured by heating in a water bath, and the sequence is repeatedly blocked by standing in an incubator.
- the array slide after hybridization and washing can obtain images of fluorescence derived from test DNA and control DNA by a quantitative detection device such as a laser scanner or a CCD camera.
- a probe having a hybridizable DNA sequence is labeled with a fluorescent substance on a genomic region to be examined in a chromosome sample, hybridized with a genomic region of the chromosome, and the quantity of fluorescent signals obtained thereby is fluorescent. This is a method of counting under a microscope.
- FIG. 2 is a graph showing the expression site of the SLC25A24 gene
- FIG. 3 (a) is a graph showing changes in white adipose tissue by a high fat diet
- the white adipose tissue white adipose tissue existing around the kidney was collected, and its weight was measured, followed by RNA extraction.
- the expression of SLC25A24 gene is high in the white adipose tissue, and as shown in FIG. 3 (a), the weight of the white adipose tissue is significantly high in the high fat diet group.
- the expression level of SLC25A24 gene at the mRNA level was significantly higher in the high fat diet group.
- FIG. 4 (a) is a graph showing changes in the expression of SLC25A24 when the SLC25A24 gene is knocked down
- FIG. 4 (b) is a graph of aP2 which is a differentiation marker for adipocytes when the SLC25A24 gene is knocked down. It is a graph which shows the change of expression.
- + ⁇ indicates the presence or absence of differentiation-inducing stimulation. Expression was examined by real-time PCR.
- siRNA DHARMACON, siGEN OME SMART pool Cat # M-054013-00
- siRNA 3T3L1 cells of mouse adipocyte precursor cells (control: DHARMACON, siCONTROL Non-Targeting siRNA # 5 Cat # D -001 210-05).
- siRNA 5 nM was transfected on the first day (QIAGEN, HiPerFect). Differentiation induction was started the day after transfection with siRNA.
- Dulbecco's modified Eagle's medium with 10% FBS Culturing was started in medium in which 0.5 mM isobutylmethylxanthine (IBMX, Sigma), 1 ⁇ M dexamethasone (Dex, Sigma) and 10 ⁇ g / ml bovine insulin (Sigma) (MDI mixture) were added to (DMEM).
- IBMX isobutylmethylxanthine
- Dex dexamethasone
- MDI mixture 10 ⁇ g / ml bovine insulin
- FIGS. 5A to 5E are graphs showing changes in expression of differentiation markers PPAR ⁇ , C / EBP ⁇ , C / EBP ⁇ , C / EBP ⁇ , and UCP2, respectively. As shown in the figure, the expression was suppressed by siSLC25A24 in all cases.
- the differentiation marker aP2 is an adipocyte fatty acid-binding protein, and is expressed in adipocytes and macrophages to combine inflammation and metabolic reaction.
- aP2-deficient mice have revealed that this lipid chaperone plays an important role in the pathology of metabolic syndrome such as type 2 diabetes and arteriosclerosis. In mouse models of genetic or dietary obesity, it is known that aP2 deficiency protects mice from insulin resistance.
- the differentiation marker PPAR ⁇ is a peroxisome proliferator-responsive receptor, a nuclear receptor that is expressed in most vertebral moving objects, and is used for intracellular metabolism and differentiation of cells such as hydrocarbons, lipids, and proteins. It is a group of transcription factors that are closely related. PPAR ⁇ , a subtype of PPAR, has been identified as a factor that binds to the fatty acid-specific enhancer of the aP2 gene. PPAR ⁇ is a transcription factor essential for adipocyte differentiation and energy storage, and has attracted attention as a target factor for a diabetic ameliorating agent thiazolidine derivative.
- C / EBP is a bZIP protein with a basic amino acid region and a leucine zipper, and constitutes a family consisting of C / EBP ⁇ , C / EBP ⁇ , C / EBP ⁇ , C / EBP1, and CHOP encoded by different genes is doing.
- C / EBP ⁇ is known to be involved in terminal differentiation of adipocytes and hepatocytes.
- C / EBP ⁇ and C / EBP ⁇ are induced, and these induce C / EBP ⁇ and PPAR ⁇ .
- PPAR ⁇ is involved in fat accumulation and C / EBP ⁇ determines insulin sensitivity in adipocytes.
- UCP2 is an uncoupling protein and has a function of regulating heat production in the body. When UCP is activated, it becomes thermal energy and functions to maintain body temperature.
- UCP1 is present in brown adipocytes
- UCP2 is widely distributed throughout the body including white adipocytes, skeletal muscle, spleen and small intestine
- UCP3 is mainly in skeletal muscle
- UCP4 and UCP5 are mainly Exists in the brain.
- FIG. 6 (a) is a graph showing changes in the expression of SLC25A24 when the SLC25A24 gene is stably expressed
- FIG. 6 (b) is an adipocyte differentiation marker when the SLC25A24 gene is stably expressed. It is a graph which shows the change of expression of aP2.
- Mouse adipocyte progenitor cells 3T3-L1 were transfected with a plasmid (pcDNA3-FLAG-SLC25A24) and selected with antibiotics (G418) to establish SLC25A24 stably expressing cells.
- FIG. 6 (a) high expression of SLC25A24 was confirmed in the clone # 7 and clone # 8 by the real-time PCR method.
- the differentiation marker aP2 was expressed in these two types of cells. High expression was confirmed. Thus, it was confirmed that when the SLC25A24 gene was stably expressed, differentiation of adipocytes was induced.
- FIG. 7 is a design diagram of a Targeting Vector for the SLC25A24 knockout mouse. This Targeting Vector was inserted into the SLC25A24 gene of mouse ES cells.
- FIG. 8 is an explanatory diagram showing the structure of the mouse SLC25A24 gene.
- the mouse SLC25A24 gene is composed of 10 exons.
- the Targeting Vector for creating a knockout mouse used in this example, the splice acceptor upstream of the mouse SLC25A24 gene Exon2 is left, the middle of Exon2 to the splice donor downstream of Exon2 is cut, and a stop codon and SV40polyA are inserted therein. Even if the promoter activity of this gene is strong and polyA does not stop downstream transcription and misreads, if Exon2 (127 bp) is skipped, a frame shift occurs and knockout can occur.
- the protein expected to be transcribed and translated is 73AA (about 8 KDa), which corresponds to the N-terminal side of the original sequence (NM_172685).
- FIG. 9 is an explanatory diagram showing the structure of mouse SLC25A24 protein.
- the SLC25A24 protein has three EF hand domains (EF) from the N-terminus and six transmembrane domains (TM) at the C-terminus.
- EF EF hand domains
- TM transmembrane domains
- the knockout mouse in this embodiment is designed to be cut from the second half of the EF hand domain.
- FIG. 10 is a result (photograph) of Western Blot confirming deletion of SLC25A24 protein in knockout mice. Whether the SLC25A24 protein was actually deleted in the SLC25A24 knockout was examined by the Western Blot method.
- Wt white adipose tissue of wild type
- SLC25A24 knockout mouse KO
- Western Blot was performed using anti-SLC25A24 antibody
- SLC25A24 protein was deleted in the white adipose tissue derived from knockout mouse. It was confirmed that
- Anti-SLC25A24 antibody was prepared as follows. By immunizing rabbits as antigens with a synthetic peptide in which cysteine is added to the C-terminal of the 146th to 161st sequence (EWRDYFLFNPVTDIEE), which is a common amino acid sequence in human SLC25A24 and mouse SLC25A24, human and mouse are immunized SLC25A24 polyclonal antibody against was obtained.
- EWRDYFLFNPVTDIEE synthetic peptide in which cysteine is added to the C-terminal of the 146th to 161st sequence
- a conventionally known method for producing an antibody by immunizing a host animal can be appropriately used.
- the type of host animal to be immunized is not particularly limited, and for example, mammals such as rabbits, rats, mice, goats, sheep, horses, pigs, guinea pigs, and birds such as chickens, pigeons, ducks, quails can be used.
- the administration method of the antigen is not particularly limited, and intradermal administration, subcutaneous administration, intraperitoneal administration, intravenous administration, intramuscular administration, and the like can be appropriately used.
- body fluid such as serum or ascites fluid of the immunized host animal may be collected and the antibody isolated and purified.
- a hybridoma is prepared by fusing myeloma cells with antibody-producing cells such as spleen cells and lymphoid cells in the immunized host animal, and the hybridoma is proliferated. What is necessary is just to isolate and purify the hybridoma cell which produces the antibody with specificity.
- the method for purifying the polyclonal antibody and the monoclonal antibody is not particularly limited, and for example, salting out, dialysis, ion exchange chromatography, affinity chromatography, electrophoresis and the like can be used as appropriate.
- the method for screening antibody production is not particularly limited, and for example, a radioimmunoassay method, an enzyme immunoassay method and the like can be used as appropriate.
- the antibody thus obtained may be used as an antibody per se, or may be used as an active fragment of an antibody obtained by performing an enzyme treatment or the like, or may be mixed with other drugs etc. as a reagent. Etc. may be used.
- FIG. 11 is a graph showing changes in body weight of knockout mice with a high fat diet.
- the SLC25A24 knockout mouse obtained above was maintained as a strain, loaded with a high fat diet (trade name; HFD32, manufactured by CLEA Japan, fat content 32% by mass) from 8 weeks of age, and two knockout mice and a wild type mouse (C57BL / J) and weight comparison.
- a high fat diet trade name; HFD32, manufactured by CLEA Japan, fat content 32% by mass
- MRNA was extracted from white adipose tissue derived from SLC25A24 knockout mice and white adipose tissue derived from wild type mice. Using this mRNA, expression analysis was performed by a microarray method (Affymetrix GeneChip Mouse Gene 1.0 ST Array) according to a conventional method.
- FIG. 12 is a table of gene groups whose expression increases in knockout mice
- FIG. 13 is a table of gene groups whose expression decreases in knockout mice.
- genes whose expression increases gene groups having a signal intensity ratio of 1.5 or more in the white adipose tissue derived from SLC25A24 knockout mice compared to the wild type were listed.
- genes whose expression decreases gene groups having a signal intensity ratio of 0.75 or less in the white adipose tissue derived from SLC25A24 knockout mice compared to the wild type are listed.
- a plurality of genes related to steroid metabolism were included at the top of the gene group whose expression was elevated in the knockout mouse (Hsd3b1, Cyp11b1, Cyp11a1, Srd5a2, Cyp21a1, Hsd3b6, Star).
- FIG. 14 is an explanatory diagram of a plasmid (pCAGGS-SLC25A24-HA-FLAG-pA) used for the production of transgenic mice.
- a plasmid (pCAGGS-SLC25A24-HA-FLAG-pA) was prepared by incorporating the isolated human SLC25A24 gene into the pCAGGS vector and adding a HA-FLAFG tag to the C-terminus.
- the pCAGGS vector allows the gene to be introduced to be overexpressed almost entirely by the CAG promoter, that is, the structure connecting Cytomegalovirus enhancer and Chicken ⁇ -actin promoter and the polyA signal site of the rabbit ⁇ -globin gene.
- CAG promoter that is, the structure connecting Cytomegalovirus enhancer and Chicken ⁇ -actin promoter and the polyA signal site of the rabbit ⁇ -globin gene.
- FIG. 15 is a result (photograph) of Western Blot confirming high expression of SLC25A24 protein in transgenic mice. Whether the SLC25A24 protein was actually highly expressed in SLC25A24 transgenic mice was examined by the Western Blot method. Proteins were extracted from white adipose tissue of wild type (Wt) and two lines of transgenic mice (TG2: Line2, TG14: Line14), and Western Blot was performed using anti-SLC25A24 antibody. As a result, it was confirmed that the SLC25A24 protein was highly expressed in the two lines of transgenic mice than in the wild type mice. Further, since the FLAG tag is added to the introduced SLC25A24 gene, the expression of the introduced SLC25A24 gene can also be detected by an anti-FLAG antibody.
- FIG. 16 is a graph showing changes in body weight of transgenic mice with a high fat diet
- FIG. 16 (a) shows the results for males with a high fat diet
- FIG. 16 (b) shows the results for females with a high fat diet.
- Two strains (Line2, Line14) of the SLC25A24 transgenic mice obtained above were maintained, and a high-fat diet (trade name; HFD32, manufactured by CLEA Japan, fat content 32% by mass) was loaded from the age of 4 weeks.
- the body weight was compared between the strain and wild type mice (C57BL / J).
- an anti-obesity drug having an action of suppressing differentiation of adipocytes can be obtained using a drug that suppresses or regulates the expression of the SLC25A24 gene or inhibits or regulates its activity.
- the anti-obesity drug according to the present invention is useful as a medicine because it can improve obesity such as adiposity.
- the anti-obesity drug does not necessarily suppress the expression of the SLC25A24 gene or does not necessarily inhibit the activity, and has the effect of regulating the expression or regulating the activity and consequently suppressing the differentiation of adipocytes. That's fine.
- the ortholog of SLC25A24 is not particularly limited, and can be, for example, those derived from non-human animals such as mice, rats, hamsters, guinea pigs, rabbits, cows, sheep, pigs, goats, monkeys and the like. Further, the target SLC25A24 may have one or more mutations in the amino acid sequence encoded by the SLC25A24 as long as it has an adipocyte differentiation ability.
- the anti-obesity drug according to the present invention may appropriately contain a pharmaceutically acceptable carrier.
- a pharmaceutically acceptable carrier examples include sucrose, starch, mannitol, sorbit, lactose, glucose, cellulose, talc, calcium phosphate, calcium carbonate and other excipients, cellulose, methylcellulose, hydroxypropylcellulose, polypropylpyrrolidone, gelatin Binders such as gum arabic, polyethylene glycol, sucrose, starch, starch, carboxymethylcellulose, hydroxypropyl starch, sodium-glycol starch, sodium bicarbonate, calcium phosphate, calcium citrate and other disintegrants, magnesium stearate, aerosil , Lubricants such as talc and sodium lauryl sulfate, fragrances such as citric acid, menthol, glycyllysine / ammonium salt, glycine and orange powder, sodium benzoate Preservatives such as sodium bisulfite, methylparaben,
- Suitable forms for oral administration of anti-obesity drugs include solutions in which an effective amount of substance is dissolved in a diluent such as water or physiological saline, capsules containing an effective amount of the substance as solids or granules, sachets or Tablets, suspensions in which an effective amount of a substance is suspended in an appropriate dispersion medium, emulsions in which an effective amount of a substance is dissolved and dispersed in an appropriate dispersion medium, powders, granules, etc. Is mentioned.
- Examples of forms suitable for parenteral administration such as intravenous injection, subcutaneous injection, intramuscular injection, and local infusion include aqueous and non-aqueous isotonic sterile injection solutions, which include antioxidants and buffer solutions. , Antibacterial agents, tonicity agents and the like may be included.
- Aqueous and non-aqueous sterile suspensions can also be mentioned, which may include suspending agents, solubilizers, thickeners, stabilizers, preservatives and the like.
- Such a preparation may be enclosed in a container in unit doses or multiple doses, such as ampoules and vials.
- the active ingredient and a pharmaceutically acceptable carrier may be lyophilized and stored in a state that may be dissolved or suspended in a suitable sterile vehicle immediately before use.
- the dose of the anti-obesity drug varies depending on the activity and type of the active ingredient, the mode of administration, the severity of the disease, the animal species to be administered, the drug acceptability of the administration target, body weight, age, etc.
- the standard is 0.001 mg to about 5.0 g / kg.
- a step of evaluating whether a test substance can suppress or regulate the expression of SLC25A24, or whether it can inhibit or regulate its activity, and suppress or suppress the expression of SLC25A24 In screening for an anti-obesity drug, a step of evaluating whether a test substance can suppress or regulate the expression of SLC25A24, or whether it can inhibit or regulate its activity, and suppress or suppress the expression of SLC25A24.
- any known compound or novel compound can be used as a test substance to be subjected to the screening method.
- a low molecular weight organic compound a compound library prepared using combinatorial chemistry technology, a nucleic acid (nucleoside, Oligonucleotides, polynucleotides, etc.), carbohydrates (monosaccharides, disaccharides, oligosaccharides, polysaccharides, etc.), lipids (saturated or unsaturated linear, branched, ring-containing fatty acids, etc.), amino acids, proteins (oligopeptides) , Polypeptides, etc.), random peptide libraries prepared by solid phase synthesis or phage display methods, natural components derived from microorganisms, animals and plants, marine organisms, and the like.
- Any method can be used as long as the effect of suppressing or regulating the expression of SLC25A24 by the test substance or inhibiting or regulating the activity can be evaluated, for example, non-human animals, or suppression or regulation of SLC25A24, inhibition of activity, Modulation may be performed using cells that can be measured.
- Model animals exhibiting obesity or conditions or diseases resulting from obesity may be used.
- model animals that exhibit obesity or obesity-related conditions or diseases include, for example, obesity or disease model animals (ob / ob mice, Ay mice, Zucker-fatty rats, Otsuka long-evans fatty (OLETF) rats, glutamic acid Mice and rats with hyperphagia induced by the administration of drugs, etc., model animals with a condition or disease caused by obesity, model animals with a high-fat diet load, or disease animals with abnormal glucose tolerance (db / db mice) , KKAy mice, Wistar-fatty rats, Goto-Kakizaki (GK) rats, Otsuka long-evans fatty (OLETF) rats, Akita mice, pancreatic destructive mice and rats such as streptozotocin),
- a conventionally known method can be used for administering the test substance to the non-human animal.
- oral administration and parenteral administration intravenous injection, subcutaneous injection, intraperitoneal injection, local injection, etc.
- the dose, administration interval, administration period, and the like are appropriately set according to the test substance used, the type of animal, and the like.
- body fat percentage, body weight, basal metabolism, and the like can be used as indices in addition to body fat mass.
- test substance may evaluate whether the test substance has the effect which suppresses the expression of SLC25A24 by measuring the expression level of SLC25A24 in the animal which administered the test substance.
- the expression level may be measured, for example, by collecting a biological sample such as adipose tissue from a non-human animal and measuring a transcription product or the like in the sample.
- Screening may be performed using non-human animal tissues and cells, for example, adipose tissue or adipocytes.
- Cells that can directly evaluate the expression level of the product of SLC25A24 are SLC25A24-expressing cells such as adipocytes, and cells that can indirectly evaluate the expression level of the product of SLC25A24 are reporters about the transcriptional regulatory region of the SLC25A24 gene.
- a cell enabling a reporter assay for the transcriptional regulatory region of the SLC25A24 gene is a cell comprising a transcriptional regulatory region of the SLC25A24 gene and a reporter gene operably linked to that region.
- the transcriptional regulatory region of the SLC25A24 gene is arbitrary as long as it can control the expression of SLC25A24. For example, one or more bases in the base sequence of the transcriptional regulatory region of the SLC25A24 gene are deleted, substituted, or added. A region having an ability to control transcription is exemplified.
- the present invention can also provide a non-human animal deficient in the SLC25A24 gene, and tissues or cells derived therefrom.
- the non-human animal can be a model animal in an anti-obesity or low insulin or low leptin state, and is significantly different from the wild type.
- Tissues or cells derived therefrom are screened according to the present invention, screening for marker genes for diseases or conditions for which obesity improvement is desired, screening for adipocyte marker genes, pathological mechanisms for diseases or conditions for which obesity improvement is desired.
- Useful for analysis can be achieved, for example, by measuring an expression profile in a non-human animal according to the present invention using a microarray, a protein chip, or the like, and comparing it with the expression profile of a control animal.
- the method and kit for evaluating the predisposition to obesity according to the present invention, it is effectively evaluated whether or not the predisposition to cause a condition or disease caused by obesity or obesity, so that various diseases related to obesity can be prevented or treated early. Contribute to.
- the anti-obesity drug according to the present invention suppresses adipocyte differentiation, thereby contributing to the treatment of various diseases related to obesity without causing other undesirable effects. This is useful for combating obesity, which is becoming a social problem, and has high industrial utility value.
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Abstract
Description
このことは、早期に治療を行うことが重要であることを示唆するが、肥満を早期に予知するマーカーは未だ得られていない。
特許文献1には、PAPPA、PAM、pf20、DNAH11、PKD1、KCNMA1、PKHD1、NRXN3、EPHA7、ROS1、FKSG87、C3orf6、TOX、DLG2、MDS1、FABP2、EFA6R、FLJ20125、Clorf10、CHL1、BICD1、KREMEN1、ADARB2、A2BP1、MGC4309、PIGR、PCSK7、HSF2から選択される蛋白質をコードする遺伝子またはそれに密接に連鎖する多型を検出することが開示されている。
特許文献2には、縮れ関連タンパク質(FRZB)遺伝子の多型を検出することが開示されている。
特許文献3には、gad2遺伝子の5’領域における多型を検出することが開示されている。
特許文献4には、ENPP1のSNPを検出することが開示されている。
しかし、いずれの従来技術も実用化には至っていない。
本発明による抗肥満薬は、SLC25A24遺伝子の発現を抑制または調節するか、活性を阻害または調節する薬剤を含有し、脂肪細胞の分化を抑制するので、好ましくない他の作用を起こすことなく、肥満または肥満に起因する状態または疾患を、予防または治療することができる。
そのため、糖尿病や、高脂血症、高血圧症、高インスリン血症、動脈硬化症、高脂血症、高血圧症、多嚢胞性卵巣症候群などの予防や治療にも有用である。
本発明による脂肪組織または脂肪細胞は、モデル組織や細胞として有用である。
本発明によるトランスジェニックマウスの作成方法は、モデル動物の作成方法として有用である。
以下に、実施例と、本発明の根拠となる実証実験を示して、本発明を説明する。本発明の実施形態は、下記の例に限らず、特許文献5など従来公知の技術を適宜援用可能である。
527名の閉経後女性を対象とし、体脂肪率(%FAT)はDEXA法で測定した。対象者の末梢血よりDNAを採取し、SLC25A24遺伝子のイントロン1(1番染色体108534690-108535300)に存在するCNVのコピー数を判定した。
これにより、被験者のヒト遺伝子を含む試料を用い、SLC25A24遺伝子のイントロン1におけるCNV、またはそれと連鎖不均衡の関係にある遺伝子多型を検出することで、肥満または肥満に起因する状態または疾患を生じ得る素因を有するか否かを評価することが可能である。DNAチップなどの肥満素因の評価キットとして提供してもよい。
CNVとSNPとの間における連鎖不平衡の関係を同定するためには、CNVの異なる群の間で、genotypingした遺伝子多型の各アレルの頻度を求めることで行ってもよい。例えば、まず遺伝子多型のgenotypingを行い、続いてCNV=0の群と1以上の群との間において、genotypingした遺伝子多型の各アレルの頻度をχ二乗検定し、統計上有意(P<0.05)なものをCNVと連鎖不均衡の関係にある遺伝子多型と定義できる。
なお、SNPの場合は、genotypingをして、genotypeからD’及びr2を算出することで1に近い値をとるものを連鎖不平衡と定義できる。
CNVは、コントロールと比較して相対的にコピー数が多い場合と少ない場合とがあり、それぞれ重複および欠失と呼ばれる。通常ヒト等の細胞には遺伝子は2コピーあり、1つは父方、もう1つは母方に由来するとされるが、個体によっては1細胞当たり1コピーのみであったり、あるいは3コピー以上存在する。このような遺伝子の重複や欠失は、正常な形質をもつヒトのゲノム中に高頻度に見られ、CNVは、疾患感受性や薬剤感受性などを含めヒトの形質差に広く関与している可能性が示唆されている。
また、遺伝子の中にも、正常な機能を有するアレル、機能が亢進または減少するアレル、機能を全く失うようなアレルが存在することがあり、単に遺伝子レベルではなく、特定のアレルのコピー数の変化が表現型に影響を及ぼすことがある。
BACクローンと反応させるDNAは、ランダムプライム法などで標識する。標識したDNA溶液は、酢酸ナトリウムやエタノールを用いて、DNAに取り込まれなかった標識物質等除去するため洗浄する。精製された標識DNAは、ハイブリダイゼーション溶液に溶解する。水浴中で加熱することによりDNAを熱変性させ、インキュベータ内で静置することにより、繰り返し配列をブロックする。
ハイブリダイゼーション及び洗浄後のアレイスライドは、レーザースキャナーやCCDカメラなどの定量的検出装置により、被験DNA及びコントロールDNA由来蛍光による画像を得ることができる。
C57BL6雄マウス(4週齢、n=6)に継続的に餌を与えた。飼育は、標準食群と高脂肪食群(日本クレア、High Fat Diet 32)で実施した。飼育期間は12週間とし、12週経過時点で解剖して、組織の重量測定、各組織におけるSLC25A24遺伝子の発現量を測定するためのリアルタイムPCR法をそれぞれ行った。白色脂肪組織は腎臓周囲に存在する白色脂肪組織を採取し、その重量を測定後、RNA抽出を行った。
その結果、図2に示すように、SLC25A24遺伝子の発現は白色脂肪組織で高く、図3(a)に示すように、高脂肪食群では白色脂肪組織の重量が有意に高く、図3(b)に示すように、高脂肪食群ではSLC25A24遺伝子のmRNAレベルでの発現量が有意に高かった。
siRNAをトランスフェクションした次の日より分化誘導を開始した。分化誘導においては、10% FBS入りDulbecco's modified Eagle's medium
(DMEM)に、0.5mM isobutylmethylxanthine (IBMX、Sigma)、1μM dexamethasone (Dex、Sigma) 並びに10μg/ml bovine insulin (Sigma) (MDI mixture)を加えたmediumにて培養を開始した。4日目に同様のmediumにてmedium交換を行い、5日目にRNAを回収した。
図示の通り、いずれも、siSLC25A24により発現が抑制された。
C/EBPαは脂肪細胞や肝細胞の最終分化に関与することが知られている。3T3-L1培養前駆脂肪細胞を用いたin vitro の検討において、C/EBPβやC/EBPδが誘導され、これらがC/EBPαやPPARγを誘導する。PPARγは脂肪蓄積に関与し、C/EBPαは脂肪細胞におけるインスリン感受性を決定する。それぞれ脂肪細胞においても発現が持続されることにより、脂肪細胞の形態、機能維持に重要と考えられている。一方、C/EBPβ及びC/EBPδは脂肪細胞では発現が低下することから、分化過程早期でC/EBPαやPPARγを誘導することや、一過性の細胞増殖に働くことが主な機能であると考えられている。
マウスの脂肪細胞前駆細胞3T3-L1にプラスミド(pcDNA3-FLAG-SLC25A24)をトランスフェクションし、抗生物質(G418)で選択を行い、SLC25A24安定発現細胞を樹立した。
図6(a)に示すように、クローン#7及びクローン#8においてリアルタイムPCR法によりSLC25A24の高発現が確認され、図6(b)に示すように、この2種類の細胞において分化マーカーaP2の高発現が確認された。これにより、SLC25A24遺伝子を安定発現させた場合は、脂肪細胞の分化を誘導することが確認された。
図7は、SLC25A24ノックアウトマウス用のTargeting Vectorの設計図である。
このTargeting VectorをマウスES細胞のSLC25A24遺伝子に挿入した。
マウスSLC25A24遺伝子は10個のエクソンより構成されている。本実施例で用いたノックアウトマウス作成用Targeting Vectorでは、マウスSLC25A24遺伝子Exon2上流のスプライスアクセプターを残し、Exon2の途中からExon2下流のスプライスドナーまでを削り、そこにストップコドンとSV40polyAを挿入する。
仮に、この遺伝子のプロモーター活性が強力でpolyAでは下流の転写が止まらずミスリードした場合でも、Exon2(127bp)が飛ばされるとフレームシフトがおこりノックアウトすることができる。また、Exon2上流のスプライスアクセプターでトラップできれば、下流に挿入したストップコドンまでしか転写・翻訳されない。
本実施例でのノックアウトマウス設計において、転写・翻訳されると予想される蛋白質は73AA(約8KDa)であり、これはオリジナル配列(NM_172685)のN末端側に相当する。
SLC25A24蛋白質はN末端からEFハンドドメイン(EF)が3個存在し、C末端には膜貫通ドメイン(TM)が6個存在する。本実施例でのノックアウトマウスではEFハンドドメインの2つ目の途中から削る設計になる。
SLC25A24ノックアウトにおいて実際にSLC25A24蛋白質が欠失しているかを、Western Blot法により検討した。
野生型(Wt)及びSLC25A24ノックアウトマウス(KO)の白色脂肪組織より蛋白質を抽出し、抗SLC25A24抗体を用いてWestern Blotを行ったところ、ノックアウトマウス由来の白色脂肪組織においてSLC25A24蛋白が欠失されていることが確認された。
ヒトSLC25A24とマウスSLC25A24での共通のアミノ酸配列である146番目から161番目の配列(EWRDYFLFNPVTDIEE)のC末端に、システインを付加した合成ペプチドを、抗原としてウサギに免疫感作することによって、ヒト及びマウスに対するSLC25A24ポリクローナル抗体を得た。
免疫感作させる宿主動物の種類は、特に制限されず、例えば、ウサギ、ラット、マウス、ヤギ、ヒツジ、ウマ、ブタ、モルモット等の哺乳類、ニワトリ、ハト、アヒル、ウズラ等の鳥類などが使用できる。
抗原の投与方法も、特に制限されず、皮内投与、皮下投与、腹腔内投与、静脈内投与、筋肉内投与などが適宜利用できる。
モノクローナル抗体を調製する場合には、例えば、免疫感作させた宿主動物における脾臓細胞やリンパ球様細胞等の抗体産生細胞とミエローマ細胞とを融合してハイブリドーマを調製し、そのハイブリドーマを増殖させ、特異性を持つ抗体を産生するハイブリドーマ細胞を単離精製すればよい。
上記で得たSLC25A24ノックアウトマウスを系統維持し、8週齢から高脂肪飼料(商品名;HFD32、日本クレア製、脂肪含有率32質量%)を負荷し、ノックアウトマウス2系統と野生型マウス(C57BL/J)との体重比較を行った。
その結果、野生型マウスよりノックアウトマウスの方が、雌雄共に有意に低体重となった(オスP=0.0064、メスP=0.019)。
SLC25A24ノックアウトマウス由来の白色脂肪組織と野生型マウス由来の白色脂肪組織からmRNAを抽出した。このmRNAを用い、定法に従ってマイクロアレイ法(Affymetrix社GeneChip Mouse Gene 1.0 ST Array)による発現解析を行った。
発現上昇する遺伝子としては、SLC25A24ノックアウトマウス由来白色脂肪組織において、野生型に比してシグナル強度比が1.5以上となった遺伝子群を列挙した。発現低下する遺伝子としては、SLC25A24ノックアウトマウス由来白色脂肪組織において、野生型に比してシグナル強度比が0.75以下となった遺伝子群を列挙した。
ノックアウトマウスにおいて発現上昇する遺伝子群の上位には、ステロイド代謝に関係する遺伝子群が複数含まれていた(Hsd3b1、Cyp11b1、Cyp11a1、Srd5a2、Cyp21a1、Hsd3b6、Star)。
図14は、トランスジェニックマウス作成のために用いたプラスミド (pCAGGS-SLC25A24-HA-FLAG-pA)の説明図である。
単離したヒトSLC25A24遺伝子をpCAGGSベクターに組み込み、C末端にHA-FLAFGタグを付加したプラスミド(pCAGGS-SLC25A24-HA-FLAG-pA)を作成した。
pCAGGSベクターは、CAGプロモーター、すなわち、Cytomegalovirus enhancerと Chicken β-actin promoterをつなげた構造と、ウサギのβ-グロビン遺伝子のpolyAシグナルサイトによって、導入したい遺伝子をほぼ全身に過剰発現させることができる。作成したプラスミドを用い、定法に従って、全身においてSLC25A24遺伝子が高発現する(C57BL/Jをバックグラウンドとする) SLC25A24トランスジェニックマウスを作成した。
SLC25A24トランスジェニックマウスにおいて実際にSLC25A24蛋白質が高発現するかを、Western Blot法により検討した。
野生型(Wt)及び2系統のトランスジェニックマウス(TG2:Line2、TG14:Line14)の白色脂肪組織より蛋白質を抽出し、抗SLC25A24抗体を用いてWestern Blotを行った。
その結果、2系統のトランスジェニックマウスにおいて、SLC25A24蛋白質は野生型マウスより高発現することが確認された。また、導入したSLC25A24遺伝子にはFLAGタグを付加しているので、抗FLAG抗体により、導入SLC25A24遺伝子の発現も検出することが可能である。
上記で得たSLC25A24トランスジェニックマウスを2系統(Line2、Line14)維持し、4週齢から高脂肪飼料(商品名;HFD32、日本クレア製、脂肪含有率32質量%)を負荷し、ノックアウトマウス2系統と野生型マウス(C57BL/J)との体重比較を行った。
その結果、野生型マウスよりトランスジェニックマウスの方が、雌雄共に有意に低体重となった(高脂肪食オスLine2: P=0.0066、Line14: P=0.0018。高脂肪食メスLine2: P=0.039、Line14: P=0.036)。
以上より、SLC25A24の発現量の変化は、体重に直接影響を与えることが判明した。
なお、抗肥満薬は、必ずしもSLC25A24遺伝子の発現を抑制するか、活性を阻害しなくてもよく、発現を調節するか活性を調節し、結果的に脂肪細胞の分化を抑制する作用を具備すればよい。
また、対象とするSLC25A24は、脂肪細胞の分化能を有する限り、そのコードするアミノ酸配列に1以上の変異を有していてもよい。
そのような担体としては、例えば、ショ糖、デンプン、マンニット、ソルビット、乳糖、グルコース、セルロース、タルク、リン酸カルシウム、炭酸カルシウム等の賦形剤、セルロース、メチルセルロース、ヒドロキシプロピルセルロース、ポリプロピルピロリドン、ゼラチン、アラビアゴム、ポリエチレングリコール、ショ糖、デンプン等の結合剤、デンプン、カルボキシメチルセルロース、ヒドロキシプロピルスターチ、ナトリウム-グリコール-スターチ、炭酸水素ナトリウム、リン酸カルシウム、クエン酸カルシウム等の崩壊剤、ステアリン酸マグネシウム、エアロジル、タルク、ラウリル硫酸ナトリウム等の滑剤、クエン酸、メントール、グリシルリシン・アンモニウム塩、グリシン、オレンジ粉等の芳香剤、安息香酸ナトリウム、亜硫酸水素ナトリウム、メチルパラベン、プロピルパラベン等の保存剤、クエン酸、クエン酸ナトリウム、酢酸等の安定剤、メチルセルロース、ポリビニルピロリドン、ステアリン酸アルミニウム等の懸濁剤、界面活性剤等の分散剤、水、生理食塩水、アップルジュース等の希釈剤、カカオ脂、ポリエチレングリコール、白灯油等のベースワックスなどが挙げられる。
このような製剤は、アンプルやバイアルのように、単位投与量または複数回投与量ずつ容器に封入してもよい。また、有効成分及び医薬上許容される担体を凍結乾燥し、使用直前に適当な無菌のビヒクルに溶解または懸濁すればよい状態で保存してもよい。
肥満または肥満に起因する状態または疾患を示すモデル動物としては、例えば、肥満状態または疾患のモデル動物(ob/obマウス、Ayマウス、Zucker-fattyラット、Otsuka long-evans fatty (OLETF)ラット、グルタミン酸などの薬物投与による過食誘発マウス及びラットなど)や、肥満に起因する状態または疾患のモデル動物として、高脂肪食負荷されたモデル動物や耐糖能異常に起因する疾患のモデル動物(db/dbマウス、KKAyマウス、Wistar-fattyラット、Goto-Kakizaki (GK)ラット、Otsuka long-evans fatty (OLETF)ラット、秋田マウス、ストレプトゾトシンなどの薬物投与による膵破壊マウス及びラットなど)、低アディポネクチン血症のモデル動物(アディポネクチン欠損マウス、ob/obマウス、A-ZIP脂肪萎縮症マウスなど)、高インスリン血症のモデル動物(IRS1欠損マウスなど)、動脈硬化症のモデル動物(apoE欠損マウス、LDL受容体欠損マウス、WHHLウサギなど)、高血圧症のモデル動物(11βHSD導入マウス、SHRラット、SHRSPラットなど)が挙げられる。
発現量の測定は、例えば、非ヒト動物から脂肪組織等の生体試料を採取し、その試料中の転写産物等を測定することにより行ってもよい。
SLC25A24の産物の発現レベルを直接的に評価可能な細胞は、脂肪細胞等のSLC25A24発現細胞であり、SLC25A24の産物の発現レベルを間接的に評価可能な細胞は、SLC25A24遺伝子の転写調節領域についてレポーターアッセイを可能とする細胞である。
SLC25A24遺伝子の転写調節領域は、SLC25A24の発現を制御し得る領域であれば任意であり、例えば、SLC25A24遺伝子の転写調節領域の塩基配列において1以上の塩基が、欠失、置換、付加された塩基配列からなり、転写を制御する能力を有する領域などが挙げられる。
その非ヒト動物は、抗肥満または低インスリンまたは低レプチンの状態のモデル動物であり得て、野生型に比べて有意な差異が認められるものである。
それに由来する組織または細胞は、本発明によるスクリーニング、肥満の改善が所望される疾患または状態のマーカー遺伝子のスクリーニング、脂肪細胞マーカー遺伝子のスクリーニング、肥満の改善が所望される疾患または状態の病態メカニズムの解析などに有用である。これらは、例えば、マイクロアレイやプロテインチップ等を用い、本発明による非ヒト動物における発現プロファイルを測定し、対照動物の発現プロファイルと比較する発現プロファイル解析により可能である。
Claims (15)
- 肥満または肥満に起因する状態または疾患を生じ得る素因を有するか否かを評価する方法であって、
被験者のヒト遺伝子を含む試料を用い、SLC25A24遺伝子のイントロン1におけるコピー数多型(CNV)、またはそれと連鎖不均衡の関係にある遺伝子多型を検出する工程を有する
ことを特徴とする肥満素因の評価方法。 - SLC25A24遺伝子のイントロン1におけるCNVが0の場合に、肥満または肥満に起因する状態または疾患を生じ得る素因を有すると評価する
請求項1に記載の肥満素因の評価方法。 - 遺伝子多型の検出に、BACアレイCGH法、FISH法、RFLP法、PCR-SSCP法、アレル特異的オリゴヌクレオチドハイブリダイゼーション法、ダイレクトシークエンス法、TaqMan PCR法、インベーダー法、MALDI-TOF/MS法、モレキュラービーコン法、RCA法、UCAN法、DNAチップまたはDNAマイクロアレイを用いた核酸ハイブリダイゼーション法のいずれかを用いる
請求項1または2に記載の肥満素因の評価方法。 - 被験者が日本人である
請求項1ないし3のいずれかに記載の肥満素因の評価方法。 - 肥満または肥満に起因する状態または疾患を生じ得る素因を有するか否かを評価するキットであって、
被験者のヒト遺伝子を含む試料を用い、SLC25A24遺伝子のイントロン1におけるCNV、またはそれと連鎖不均衡の関係にある遺伝子多型を検出する手段を備える
ことを特徴とする肥満素因の評価キット。 - 抗肥満薬をスクリーニングする方法であって、
被験物質が、SLC25A24遺伝子の発現を抑制または調節し得るか否か、または、その活性を阻害または調節し得るか否かを評価する工程と、
SLC25A24遺伝子の発現を抑制または調節し得るか、または、その活性を阻害または調節し得て、結果的に肥満または肥満に起因する状態または疾患を予防または治療する被験物質を、肥満または肥満に起因する状態または疾患を予防または治療する有効物質として選択する工程と、を有する
ことを特徴とする抗肥満薬のスクリーニング方法。 - 被験物質を非ヒト動物に投与する工程と、
被験物質を投与した非ヒト動物における肥満度を測定する工程と、
その肥満度を減少させる被験物質を有効物質として選択する工程とを含む
請求項6に記載の抗肥満薬のスクリーニング方法。 - 肥満または肥満に起因する状態または疾患を、予防または治療する作用を備える抗肥満薬であって、
SLC25A24遺伝子の発現を抑制または調節するか、または、その活性を阻害または調節する薬剤を含有し、脂肪細胞の分化を抑制する作用を具備する
ことを特徴とする抗肥満薬。 - SLC25A24遺伝子を欠損させた
ことを特徴とする非ヒト動物。 - SLC25A24遺伝子を過剰発現または安定発現させた
ことを特徴とする非ヒト動物。 - 脂肪細胞の分化が抑制され抗肥満の状態である
請求項9または10に記載の非ヒト動物。 - 請求項9ないし11に記載の非ヒト動物に由来する
ことを特徴とする脂肪組織または脂肪細胞。 - 野生型マウスと比較して体重増加が抑制されるトランスジェニックマウスの作成方法であって、
SLC25A24遺伝子をベクターに組み込みんだプラスミドを用いて遺伝子導入し、SLC25A24遺伝子を過剰発現または安定発現させる
ことを特徴とするトランスジェニックマウスの作成方法。 - SLC25A24蛋白質に特異的に反応する抗体であって、
SLC25A24蛋白質を構成するアミノ酸配列のうち、EWRDYFLFNPVTDIEEをエピトープとして有する抗原を用いて製造することによって得られた
ことを特徴とするSLC25A24蛋白質抗体。 - SLC25A24蛋白質に特異的に反応する抗体の製造に用いる抗原であって、
SLC25A24蛋白質を構成するアミノ酸配列のうち、EWRDYFLFNPVTDIEE をエピトープとして有する
ことを特徴とするSLC25A24蛋白質抗体製造用抗原。
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| JP2011513259A JP5677291B2 (ja) | 2009-05-15 | 2010-05-17 | 肥満素因の評価方法及びキット、並びに、抗肥満薬及びそのスクリーニング方法、非ヒト動物、脂肪組織、脂肪細胞、トランスジェニックマウス作成方法、抗原、抗体 |
| EP10774750A EP2415868A4 (en) | 2009-05-15 | 2010-05-17 | METHOD AND KIT FOR EVALUATING OBESITY DEVELOPMENT PREDISPOSITION, ANTI-OBESITY AGENT AND SCREENING METHOD, NON-HUMAN ANIMAL, ADIPOSE TISSUE, ADIPOCYTE, PROCESS FOR PRODUCTION OF TRANSGENIC MOUSE, ANTIGEN, AND 'ANTIBODY |
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| CN110596230A (zh) * | 2019-09-18 | 2019-12-20 | 山东省分析测试中心 | 一种基于maldi-tof-ms的胶囊单颗粒药物高通量分析方法 |
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| KR102780696B1 (ko) * | 2021-08-05 | 2025-03-11 | 숭실대학교산학협력단 | 비만 예방 또는 치료제의 스크리닝 방법 |
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| JP2012200216A (ja) * | 2011-03-25 | 2012-10-22 | Tohoku Univ | 2型糖尿病のdnaマーカー |
| CN110596230A (zh) * | 2019-09-18 | 2019-12-20 | 山东省分析测试中心 | 一种基于maldi-tof-ms的胶囊单颗粒药物高通量分析方法 |
Also Published As
| Publication number | Publication date |
|---|---|
| EP2415868A4 (en) | 2012-11-28 |
| JPWO2010131491A1 (ja) | 2012-11-01 |
| JP5677291B2 (ja) | 2015-02-25 |
| US20120060231A1 (en) | 2012-03-08 |
| EP2415868A1 (en) | 2012-02-08 |
| US8877443B2 (en) | 2014-11-04 |
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