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PPARγの内因性リガンドの精製と同定

Research Project

Project/Area Number 10877173
Research Category

Grant-in-Aid for Exploratory Research

Allocation TypeSingle-year Grants
Research Field Metabolomics
Research InstitutionThe University of Tokyo

Principal Investigator

戸辺 一之  東京大学, 医学部・附属病院, 助手 (30251242)

Co-Investigator(Kenkyū-buntansha) 鏑木 康志  東京大学, 医学部・附属病院, 医員
山内 敏正  東京大学, 医学部・附属病院, 医員
門脇 孝  東京大学, 医学部・附属病院, 助教授 (30185889)
植木 浩二郎  東京大学, 医学部・附属病院, 医員
Project Period (FY) 1998 – 2000
Project Status Completed (Fiscal Year 2000)
Budget Amount *help
¥1,900,000 (Direct Cost: ¥1,900,000)
Fiscal Year 2000: ¥400,000 (Direct Cost: ¥400,000)
Fiscal Year 1999: ¥600,000 (Direct Cost: ¥600,000)
Fiscal Year 1998: ¥900,000 (Direct Cost: ¥900,000)
Keywordsチアゾリジン誘導体 / PPARファミリー / PPARγのリガンド / 脂質代謝 / インスリン抵抗性 / インスリン受容体 / インスリン受容体基質 / IRS-1 / IRS-2 / IRS-3 / インスリン作用 / 発生工学
Research Abstract

チアゾリジン誘導体は脂肪細胞に発現しているPPARγに働きかけ脂肪細胞への分化を亢進し、in vivoでインスリン抵抗性を改善する。新たなチアゾリジン誘導体であるKRP-297をZucker fattyラットに投与するとBRL-49,653とは対照的に肝臓においてZucker fattyラットで低下していたパルミチン酸からのCO_2やケトン体産生能が回復することを見出した。また、肝臓での脂質産生や中性脂肪の蓄積の抑制という点でKRP-297はBRL-49,653より効果的であった。次にKRP-297のPPARファミリーの活性化能を検討するとPPARα、PPARγの活性化能のED_<50>はそれぞれ1.0μmol/L、0.8μmol/Lであった。また、PPARα、PPARγへの結合の解離定数はそれぞれ228nmol/Lであった。KRP-297はこれまでのチアゾリジン誘導体とは異なりPPARαに結合しかつPPARαを活性化することが明らかとなった。さらにKRP-297は肝でのacyl-CoA oxidaseの発現及び活性をそれぞれ1.5倍、1.8倍に上昇させた。KRP-297のPPARγの活性化作用はBRL-49,653に比べて弱いが、全身でのインスリン抵抗性改善佐用はBRL-49,653よりも良好である。このことはKRP-297のPPARγの活性化作用が存在し肝臓での脂質代謝改善佐用などを介して全身でのインスリン抵抗性改善作用に関与しているものと思われた(Murakami et al.,Diabetes 47:1841-1847,1998)。

Report

(3 results)
  • 2000 Annual Research Report
  • 1999 Annual Research Report
  • 1998 Annual Research Report
  • Research Products

    (35 results)

All Other

All Publications (35 results)

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

    • Related Report
      2000 Annual Research Report
  • [Publications] Ogata,N., et al.: "Insulin receptor substrate-1 in osteoblast is indispensable for maintaing bone turnover."J.Clin.Invest.. 105. 935-943 (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] Ueki,K, et al.: "Normalisation of insulin resistance in IRS-1 deficient mice by adenovirus-mediated gene therapy-potential role of protein kinase B in liver for the systemic glucose homeostasis."J.Clin.Invest.. 105. 1437-1445 (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 compemsatory β cell hyperplasia."Diabetes. 49. 1880-1889 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] Yamauchi,T., et al.: "Prolactin-induced tyrosine phosphorylation of ErbB 2 via Jak2 as an essential element leading to proliferation of breast carcinoma cells."J.Biol.Chem.. 273. 33937-33944 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] Terauchi,Y., et al.: "Increased insulin sensitivity and hypoglycemia in mice lacking p85α subunit of phosphoinositide 3-kinase."Nature Genetics. 21. 203-235 (1999)

    • Related Report
      2000 Annual Research Report
  • [Publications] Kubota,N., et al.: "PPARγ mediates high-fat diet-induced adipocyte hypertrophy and insulin resistance."Mol.Cell. 4. 597-609 (1999)

    • Related Report
      2000 Annual Research Report
  • [Publications] Okuno,A., et al.: "Troglitazone increases the number of small adipocytes without the change of white adipose tissue mass in obese Zucker rats."J.Clin.Invest.. 101. 1354-1361 (1998)

    • Related Report
      2000 Annual Research Report
  • [Publications] Yamauchi,T, et al.: "Growth hormone and prolactin stimulate tyrosine phosphorylation of insulin receptor substrate-1,2,3, their association with p85 phosphtatidylinostitol 3-kinase (PI3-kinase),and concomitantly PI3-kinase activation via JAK2 kinase."J.Biol.Chem.. 273. 15719-15726 (1998)

    • Related Report
      2000 Annual Research Report
  • [Publications] Murakami,K., et al.: "A novel insulin sensitizer acts as a coligand for peroxisome proliferator-activated receptor-α (PPAR-α) and PPAR-γ.Effect of PPAR-α activation on abnormal lipid metabolism in liver of zucker fatty rats."Diabetes. 47. 1841-1847 (1998)

    • Related Report
      2000 Annual Research Report
  • [Publications] Terauchi,Y. et al.: "Increased insulin sensitivity and hypoglycemia in mice lacking p85α subunit of phosphoinositide 3-kinase"Nature Genetics. 21. 230-235 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] Kubota,N. et al.: "PPARγ mediates high-fat diet-induced adipocyte hypertrophy and insulin resistance"Mol. Cell. 4. 597-609 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] Ueki,K. et al.: "Potential role of protein kinase B in insulin-induced glucose transport, glycogen synthesis, and protein synthesis"J. Biol. Chem.. 273. 5315-5322 (1998)

    • Related Report
      1999 Annual Research Report
  • [Publications] Okuno,A. et al.: "Troglitazone increases the number of small adipocytes without the change of white adipose tissue mass in obese Zucker rats"J. Clin. Invest.. 101. 1354-1361 (1998)

    • Related Report
      1999 Annual Research Report
  • [Publications] Yamauchi,T. et al.: "Growth hormone and prolactin stimulate tyrosine phosphorylation of IRS-1,2,3, their association with p85 PI3-kinase and concomitantly PI3-kinase activation via JAK2 kinase"J. Biol. Chem.. 273. 15719-15726 (1998)

    • Related Report
      1999 Annual Research Report
  • [Publications] Murakami,K. et al.: "A novel insulin sensitizer acts as a coligand for peroxisome proliferator-activated receptor-α(PPAR-α) and PPAR-γ. Effect of PPAR-α activation on abnormal lipid metabolism in liver of zucker fatty rats"Diabetes. 47. 1847 (1998)

    • Related Report
      1999 Annual Research Report
  • [Publications] Yamauchi,T. et al.: "Tyrosine phosphorylation of EGF receptor induced by growth hormone via JAK2 kinase"Nature. 7. 390 91-390 96 (1997)

    • Related Report
      1999 Annual Research Report
  • [Publications] Takahashi,Y. et al.: "Roles of insulin receptor substrate-1 and shc on insulin-like growth factor I receptor signaling in early passages of cultured human fibroblasts"Endocrinology. 138. 741-750 (1997)

    • Related Report
      1999 Annual Research Report
  • [Publications] Terauchi,Y. et al.: "Development of non-insulin-dependent diabetes mellitus in the double knockout mice with disruption of insulin receptor substrate-1 and β-cell glucokinase genes : genetic reconstitution of doabetes as a polygenic disease"J. Clin. Invest.. 99. 861-866 (1997)

    • Related Report
      1999 Annual Research Report
  • [Publications] Kaburagi,Y. et al.: "Role of insulin receptor substrate-1 and pp60 in the regulation of insulin-induced glucose transport and GLUT4 translocation in primary adipocytes"J. Biol. Chem.. 272. 25839-25844 (1997)

    • Related Report
      1999 Annual Research Report
  • [Publications] Yamauchi,T. et al.: "Insulin signalling and insulin actions in the muscles and livers of insulin resistant, insulin receptor substrate 1-deficient mice"Mol. Cell. Biol.. 16. 3074-3084 (1996)

    • Related Report
      1999 Annual Research Report
  • [Publications] Tobe,K. et al.: "Csk enhances insulin-stimulated dephosphorylation of focal adhesion proteins"Mol. Cell. Biol.. 16. 4765-4772 (1996)

    • Related Report
      1999 Annual Research Report
  • [Publications] Tamemoto,H.,and Kadowaki,T.,et al: "Insulin resistance and growth retardation in mice lacking insulin receptor substrate-1." Nature. 372. 182-186 (1994)

    • Related Report
      1998 Annual Research Report
  • [Publications] Tobe,K.,et al: "Identification of a 190-kDa protein as a novel substrate for the insulin receptor kinase functionally similar to insulin receptor substrate-1." J.Biol.Chem.270. 5698-5701 (1995)

    • Related Report
      1998 Annual Research Report
  • [Publications] Yamauchi,T.,et al: "Insulin signaling and insulin actions in the muscle and liver of insulin resistant IRS-1 deficient mice." Mol.Cell.Biol.16. 3074-3084 (1996)

    • Related Report
      1998 Annual Research Report
  • [Publications] Tobe.K.,et al: "Csk enhances insulin-stimulated dephosphorylation of focal adhesion proteins." Mol.Cell.Biol.16. 4765-4772 (1996)

    • Related Report
      1998 Annual Research Report
  • [Publications] Kaburagi,Y.,et al: "Role of insulin receptor substrate-1 and pp60 in the regulation of insulin-induced glucose transport and GLUT4 translocation in primary adipocytes" J.Biol.Chem.272. 25839-25844 (1997)

    • Related Report
      1998 Annual Research Report
  • [Publications] Terauchi,Y.,et al: "Development of non-insulin-dependent diabetes mellitus in the double knockout mice with disruption of insulin receptor substrate-1 and β-cell glucokinase genes : genetic reconstitution of diabetes as a polygenic disease." J.Clin.Invest.99. 861-866 (1997)

    • Related Report
      1998 Annual Research Report
  • [Publications] Yamauchi,T.,et al: "Tyrosine phosphorylation of EGF receptor induced by growth hormone via JAK2 kinase." Nature. 390. 91-96 (1997)

    • Related Report
      1998 Annual Research Report
  • [Publications] Ueki.K.,et al: "Protein kinase B(c-Akt)regulates glucose transport,glycogen synthesis and protein synthesis by insulin." J.Biol.Chem.273. 5315-5322 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] Okuno,A.,et al: "Troglitazone increases the number of small adipocytes without the change of white adipose tissue mass in obese Zucker rats." J.Clin,Invest.101. 1354-1361 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] Yamauchi,T.,et al: "Growth hormone and prolactin stimulate tyrosine phosphorylation of insulin receptor substrate-1,-2,and -3,their association with p85 phosphatidylinositol 3-kinase(P13-kinase),and concomitantly P13-kinase activation via JAK2 kinase." J.Biol.Chem.273. 15719-15726 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] Murakami,K.,et al: "A Novel Insulin sensitizer Acts as a Coligand for Peroxisome Proliferator-Acticvated Receptor-α(PRAR-α)and PPARγ Effect of PPAR-α Activation on Abnormal Lipid Metabolism in Liver of Zucker Fatty Rats" Diabetes. 47. 1841-1847 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] Terauchi,Y.,et al: "Increased insulin sensityvity and hypoglycaemia in mice lacking the p85 α subunit of phosphoinositide 3-kinase" Nature Genetics. 21. 230-235 (1999)

    • Related Report
      1998 Annual Research Report

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Published: 1998-04-01   Modified: 2016-04-21  

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