• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to previous page

Development of novel diagnostic and therapeutic strategies for obesity and insulin resistance by identification of endogenous PPARγ ligands

Research Project

Project/Area Number 12557093
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section展開研究
Research Field Metabolomics
Research InstitutionThe University of Tokyo

Principal Investigator

KADOWAKI Takashi  University of Tokyo, Faculty of Medicine, Associate Professor, 医学部附属病院, 助教授 (30185889)

Co-Investigator(Kenkyū-buntansha) HARA Kazuo  The University of Tokyo, Faculty of Medicine, Medical staff, 医学部附属病院, 医員
TOBE Kazuyuki  The University of Tokyo, Faculty of Medicine, Research associate, 医学部附属病院, 助手 (30251242)
YAMAUCHI Toshimasa  The University of Tokyo, Faculty of Medicine, Medical staff, 医学部附属病院, 医員
Project Period (FY) 2000 – 2001
Project Status Completed (Fiscal Year 2001)
Budget Amount *help
¥13,300,000 (Direct Cost: ¥13,300,000)
Fiscal Year 2001: ¥4,300,000 (Direct Cost: ¥4,300,000)
Fiscal Year 2000: ¥9,000,000 (Direct Cost: ¥9,000,000)
Keywordsobesity / insulin resistance / endogenous PPARγ ligands / adipocyte differentiation / thiazolidinediones / small siza adipocytes / HPLC / 15-deoxy-12.14-PGJ2 / 組織内中性脂肪含量 / CBP / 内因性リガンド / インスリン感受性 / PPARγヘテロ欠損マウス / Pro12Ala遺伝子多型 / 3T3L1脂肪細胞 / PPARγアンタゴニスト
Research Abstract

Our knockout mice studies revealed that PPARgamma was absolutely required for adipocyte differentiation (Mol. Cell. 4:597, 1999), and that IRS-1 and IRS-2 played a crucial role in the upregulation of the PPARgamma expression and adipocyte differentiation (Mol. Cell. Biol. 21:2521, 2001). Thiazolidinediones (TZD) ameliorated insulin resistance by increasing the number of small size adipocytes and decreasing hypertrophic adipocytes (J.Clin.Invest. 101:1354, 1998), which was associated with decreased molecules causing insulin resistance (J.Biol.Chem. 276: 41245, 2001) and also increased insulin senisitizing hormone adiponectin (J.Biol.Chem. 277: 25863, 2002). Insulin sensitizing effect of adiponectin appears to be mediated by an increase in fatty acid oxidation via activation of AMP kinase (Nature Medicine 8:1288, 2002) and PPARα (J.Biol.Chem. 278: 2461, 2003), thereby decreasing TG content (Nature Medicine 7:941, 2001). Unexpectedly, heterozygous CBP knockout mice showed increased insuli … More n sensitivity despite lipodystrophy. Heterozygous CBP knockout mice also showed increased effects of insulin sensitizing hormones such as leptin and adiponectin, and these may explain the phenotypes of heterozygous CBP knockout mice at least in part (Nature Genetics 30:221, 2002).
We identified a SNP (Pro12Ala) of human PPARgamma gene. Subjects with Ala allele decreasing PPARgamma activity were associated with resistance to type 2 diabetes (BBRC. 271:212, 2000). PPARgamma antagonist protected against obesity, insulin resistance and type 2 diabetes of KKA^y mice (J.Clin.Invest. 108:1001, 2001). A genetic variation in the PPARgamma coactivator PGC (PPARgamma coactivator)-1 gene could confer insulin resistance and susceptibility to Type 2 diabetes (Diabetologja. 45:740, 2002). The adiponectin SNP associated with lower plasma adiponectin levels had a higher insulin resistance index and also a significantly increased risk of type 2 diabetes (Diabetes. 51:536,2002).
Finally, we tried to identify the endogenous PPARgamma ligands, because PPARgamma ligands potentially can be involved in insulin sensitivity. Current fractionation studies using HPLC suggest a single peak of activity, indicating one or very few components. The chromatographic behavior of this activity indicates that it is not equivalent to 15-deoxy-12,14-PGJ2. Structural determination will shed light on the biochemical nature of this molecule and open the door to the study of its biosynthetic regulation. Less

Report

(3 results)
  • 2001 Annual Research Report   Final Research Report Summary
  • 2000 Annual Research Report
  • Research Products

    (41 results)

All Other

All Publications (41 results)

  • [Publications] Yamauchi T. et al.: "Globular adiponectin protected ob/ob mice from diabetes and apoE deficient mice from atherosclerosis"J. Biol. Chem.. 278. 2461-2468 (2003)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Suzawa, M. et al.: "Cytokines suppress adipogenesis and PPAR-gamma function through the TAK1/TAB1/NIK cascade"Nature Cell Biology. 5. 224-230 (2003)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Yamauchi T. et al.: "A diponectin stimulates glucose utilization and fatty-acid oxidation by activating AMP-activated protein kinase"Nature Medicine. 8. 1288-1295 (2002)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Kubota N. et al.: "Disruption of adiponectin causes insulin resistance and neointimal formation"J. Biol. Chem.. 277. 25863-25866 (2002)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Yamauchi T. et al.: "Increased insulin sensitvity despite lipodystrophy in Crebbp heterozygous mice signalling"Nature Genetics. 30. 221-226 (2002)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Hara, K. et al.: "A genetic variation in the PGC-1 gene may confer insulin resistance and susceptibility to type II diabetes"Diabetologia. 45. 740-743 (2002)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Yamauchi T. et al.: "The fat-derived hormone adiponectin reverses insulin resistance associated with both lipoatrophy and obesity"Nature Medicine. 7. 941-946 (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Yamauchi T. et al.: "Inhibition of RXR and PPARγ ameliorates diet-induced obesity and type 2 diabetes"J. Clin. Invest. 108. 1001-1013 (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Yamauchi T. et al.: "The mechanisms by which both heterozygous PPARγ deficiency and PPARγ agonist improve insulin resistance"J. Biol. Chem.. 51. 1247-1255 (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Setoguchi K, et al.: "Peroxisome proliferator-activated receptor-γ haploinsufficiency enhances B cell proliferative responses and exacerbates experimentally induced arthritis"J. Clin. Invest. 108. 1667-1675 (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Miki H, et al.: "Essential role of IRS-1 and IRS-2 in adipocyte differentiation"Mol. Cell. Biol.. 21. 2521-2531 (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Murakami K, et al.: "Fatty Acyl-CoA thioesters inhibit recruitment of steroid receptor co-activator 1 to alpha and gamma isoforms of peroxisome-proliferator-activated receptors by competing with agonists"Biochem. J.. 353. 231-238 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Yamauchi, T., et al.: "Globular adiponection protected ob/ob mice from diabetes and ApoE-deficient mice from atherosclerosis"J. Biol. Chem.. 278. 2461-2468 (2003)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Suzawa, M., et al.: "Cytokines suppress adipogenesis and PPAR-gamma function through the TAK1/TAB1/NIK cascade"Nature Cell Biology. 5. 224-230 (2003)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Yamauchi, T., et al.: "Adiponectin stimulates glucose utilization and fatty-acid oxidation by activating AMP-activated protein kinase"Nature Medicine. 8. 1288-1295 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Kubota, N., et al.: "Disruption of adiponectin causes insulin resistance and neointimal formation"J. Biol. Chem.. 277. 25863-25866 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Yamauchi T., et al.: "Increased insulin sensitivity despite lipodystrophy in Crebbp heterozygous mice signaling"Nature Genetics. 30. 221-226 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Hara, K., et al.: "A genetic variation in the PGC-1 gene may confer insulin resistance and susceptibility to type diabetes"Diabetologia. 45. 740-743 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Yamauchi, T., et al.: "The mechanisms by which both heterozygous PPARγ deficiency and PPARγ agonist improve insulin resistance"J.Biol.Chem.. 276. 41245-41254 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Yamauchi, T., et al.: "Inhibition of RXR and PPARgamma ameliorates diet-induced obesity and type 2 diabetes"J.Clin.Invest.. 108. 1001-1013 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Yamauchi, T., et al.: "Replenishment of the fat-derived hormone adiponectin reverses insulin resistance in lipoatrophic diabetes and type 2 diabetes"Nature Medicine. 7. 941-946 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Setoguchi, K., et al.: "Peroxisome proliferator-activated receptor-γ haploinsufficiency enhances β cell proliferative responses and exacerbates experimentally induced arthritis"J.Clin.Invest.. 108. 1667-1675 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Miki, H., et al.: "Essential role of IRS-1 and IRS-2 in adipocyte differentiation"Mol. Cell. Biol.. 21. 2521-2531 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Murakami, K.: "Fatty Acyl-CoA thioesters inhibit recruitment of steroid receptor co-activator 1 to alpha and gamma isoforms of peroxisome-proliferator-activated receptors by competing with agonists"Biochem. J.. 353. 231-238 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Miki, H., et al.: "Mol. Cell. Biol."Essential role of IRS-1 and IRS-2 in adipocyte differentiation. 2521-2531 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Yamauchi, T., et al.: "Increased insulin sensitivity despite lipodystrophy in Crebbp heterozygous mice"Nature Genetics. 30. 221-226 (2002)

    • Related Report
      2001 Annual Research Report
  • [Publications] Hara, K., et al.: "Genetic variation in the gene encoding adiponectin is associated with increased risk of type 2 diabetes in the Japanese population"Diabetes. 51. 536-540 (2002)

    • Related Report
      2001 Annual Research Report
  • [Publications] Yamauchi, T., et al.: "The central role of PPARγ in the regulation of insulin sensitivity"J.Clin.Invest.. 108. 1001-1013 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] Yamauchi, T., et al.: "The mechanisms by which both heterozygous PPARγ deficiency and PPARγ agonist improve insulin resistance"J.Biol.Chem.. 276. 41245-41254 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] Yamauchi, T., et al.: "Replenishment of the fat-derived hormone adiponectin reverses insulin resistance in lipoatrophic diabetes and type 2 diabetes"Nature Medicine. 7. 941-946 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] Setoguchi K., et al.: "Peroxisome proliferator-activated receptor-gamma haploinsufficiency enhances B cell proliferative responses and exacerbates experimentally induced arthritis"J.Clin.Invest.. 108. 1667-1675 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] Tobe, K., et al.: "Increased Expression of SREBP-1 gene in IRS-2(-/-)mice liver"J.Biol.Chem.. 276. 38337-38340 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] Miki, H., et al.: "Essential role of IRS-1 andaIRS-2 in adipocyte differentiation"Mol.Cell.Biol.. 21. 2521-2531 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] Okada,T., et al.: "Variants of neurogenis 3 gene are not asoociated with type 2 diabetes in Japanese subjects."Diabetologia. 44. 241-244 (2001)

    • Related Report
      2000 Annual Research Report
  • [Publications] Kato,H, et al.: "Mechanism of amelioration of insulin resistance by β-3-adrenoceptor agonist AJ-9677 in KK-Ay/Ta obese diabetic mice."Diabetes,. 50. 113-122 (2001)

    • Related Report
      2000 Annual Research Report
  • [Publications] Hara,K., et al.: "The role of PPARγ as a thrifty gene in both in mice and humans."Brit.J.Nutr.. 84. 235-239 (2001)

    • Related Report
      2000 Annual Research Report
  • [Publications] Murakami,K., et al.: "Fatty Acyl-CoA thioesters are antagonists for α and γ isoforms of peroxisome proliferators-activated receptors."Biochem.J.. 353. 1-10 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] Kubota,N., et al.: "Disruption of insulin receptor substrate-2 causes type 2 diabetes due to liver insulin resistance and lack of compensatory β-cell hyperplasia."Diabetes. 49. 1880-1889 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] Kadowaki,T., et al.: "Molecular pathogenesis of type 2 diabetes and obesity in knockout mice models."J.Clin.Invest.. 106. 459-465 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] Hara,K., et al.: "A Pro12Ala polymorphism in PPARγ2 may confer resistance to type II diabetes."Biochem.Biophys.Res. Commun.. 271. 212-216 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] Terauchi,Y., et al.: "Insulin effect during embryogenesis determines fetal growth.: a possible molocular link between birth weight and susceptibility to type 2 diabetes."Diabetes. 40. 82-86 (2000)

    • Related Report
      2000 Annual Research Report

URL: 

Published: 2000-04-01   Modified: 2016-04-21  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi