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REGULATION OF TGF-β AND ITS SIGNAL MOLECULE, SMAD, FOR ATTENUATION OF GLOEMRULAR DISEASE.

Research Project

Project/Area Number 11671063
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Kidney internal medicine
Research InstitutionKURUME UNIVERSITY

Principal Investigator

TAMAKI Kiyoshi  KURUME UNIVERSITY SCHOOL OF MEDICINE THE THIRD DEPARTMENT OF INTERNAL MEDICINE ASSISITANT PROFESSOR, 医学部, 講師 (10312141)

Project Period (FY) 1999 – 2000
Project Status Completed (Fiscal Year 2000)
Budget Amount *help
¥3,600,000 (Direct Cost: ¥3,600,000)
Fiscal Year 2000: ¥1,800,000 (Direct Cost: ¥1,800,000)
Fiscal Year 1999: ¥1,800,000 (Direct Cost: ¥1,800,000)
KeywordsGrowth factor / TGF-β / Smad / glomerulonephritis / glomerulosclerosis / renal fibrosis / Adenovirus-vector / TGF-β / アンギオテンシンII / IgA腎症 / アデノウイルス / 活性化 / ステロイド / メザンギウム細胞 / マトリックス蛋白 / PAI-1 / 遺伝子導入
Research Abstract

TGF-β1 plays a pathological role in fibrotic diseases including glomerulosclerosis and renal fibrosis. Smads have been identified as pivotal components in TGF-β intracellular signaling. The present study was carried out to investigate TGF-β1-induced Smad activation in cultured mesangial cells and experimental mesangioproliferative glomerulonephritis in rats. In mesangial cells, TGF-β1, but not BMP-7, induced phosphorylation of Smad2. In contrast, BMP-7, but not TGF-β1, induced phosphorylation of BMP-related Smads. TGF-β1 stimulated the phosphorylation of Smad2 in a dose- and time-dependent manner. Gene transfer using Adenovirus-vector, double-overexpression of Smad2 and Smad4 induced TGF-β1-stimulated plasminogen activator inhibitor-1 (PAI-1) expression more than overexpression of each Smad alone. Furthermore, overexpression of Smad7, one of inhibitory Smads, but not Smd6, blocked TGF-β1-induced PAI-1 expression and reversed TGF-β1-inhibited cell proliferation by inhibiting Smad2 phosphorylation. In experimental glomerulonephritis using Thy-1 nephritis, Smad2 phosphorylation increased transiently and significantly in a similar manner to glomerular matrix expansion. Phosphorylated Smad2 was observed in the damaged glomeruli. These results suggested that Smad proteins are present and act as signaling molecule of TGF-β in mesangial cells in vitro and in vivo. Our results indicate the possibility that modulation of Smad activity may attenuate the development of glomerulosclerosis and fibrosis

Report

(3 results)
  • 2000 Annual Research Report   Final Research Report Summary
  • 1999 Annual Research Report
  • Research Products

    (22 results)

All Other

All Publications (22 results)

  • [Publications] Ishisaki A,Tamaki, et al: "Differential inhibition of Smad6 and Smad7 on bone morphogenetic protein- and activin-mediated growth arrest and apoptosis in B cells"J Biol Chem. 274. 13637-13642 (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] Kashiwagi M,Tamaki K et al: "Locally activated renin-angiotensin system associated with TGF-beta 1 as a major factor for renal injury induced by chronic inhibition of nitric oxide synthase in rats."J Am Soc Nephrol.. 11. 616-624. (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] Tamai O,Tamaki K, et al: "Caveolae in mesangial cells and caveolin expression in mesangial proliferative glomerulonephritis."Kidney Int. 59. 471-480 (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] Tamaki K,Okuda S et al: "Transforming growth factor-β1 induced phosphorylation of Smad2 in mesangial cells in vitro and in vivo."J Am Soc Nephrology.. 10. 581-581 (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] Fujisawa M,Tamaki K,Okuda S et al: "Inhibited TGF-betal activation and atherosclerosis in hemodialysis patients"J Am Soc Nephrology.. 10. 279-279 (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] Haramaki R,Tamaki K,Okuda S et al: "Steroid therapy and urinary transforming growth factor-b1 in IgA nephropathy."J Am Soc Nephrology.. 10. 62-62 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] Ishisaki A, Tamaki, ten Dijke P et al: "Differential inhibition of Smad6 and Smad7 on bone morphogenetic protein- and activin-mediated growth arrest and apoptosis in B cells"J Biol Chem. 274. 13637-42 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] Kashiwagi M, Tamaki K,, Okuda S et al: "Locally activated renin-angiotensin system associated TGF-β1 as a major factor for renal injury induced by chronic inhibition of nitric oxide synthase in rats."J Am Soc Nephrol. 11. 616-624 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] Tamai O, Tamaki K,, Okuda S et al: "Caveolae in mesangial cells and caveolin expression in mesangial proliferative glomerulonephritis."Kidney Int.. 59. 471-480 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] Tamaki K, Okuda S et al: "Transforming growth factor-β1 induced phosphorylation of Smad2 in mesangial cells in vitro and in vivo."J Am Soc Nephrology. 10. 581 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] Fujisawa M, Tamaki K, Okuda S et al: "Inhibited TGF-beta1 activation and atherosclerosis in hemodialysis patients"J Am Soc Nephrology. 10. 279 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] Haramaki R, Tamaki K, Okuda S et al: "Steroid therapy and urinary transforming growth factor-b1 in IgA nephropathy."J Am Soc Nephrology.. 11. 62 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] Tamai O,Tamaki K, et al: "Caveolae in mesangial cells and caveolin expression in mesangial proliferative glomerulonephritis."Kidney International. 59. 471-480 (2001)

    • Related Report
      2000 Annual Research Report
  • [Publications] Kohno K,Tamaki K, et al: "Minimal change nephrotic syndrome associated with rifampicin treatment."Nephrol Dial Transplant.. 15. 1056-1059. (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] Kashiwagi M,Tamaki K et al: "Locally activated renin-angiotensin system associated with TGF-beta1 as a major factor for renal injury induced by chronic inhibition of nitric oxide synthase in rats."J Am Soc Nephrology. 11. 616-624. (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] Haramaki R,Tamaki K et al: "Steroid therapy and urinary TGF-β1 in IgA nephropahty."J Am Soc Nephrology. 11. 62-62 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] Ueda S,Tamaki K et al:: "Overexpression of Smad7 inhibits TGF-β response in mesangial cells."J Am Soc Nephrology. 11. 466-466 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] Tamaki K: "Transforming Growth Factor(TGF)-β1 Induced Phosphorylation of Smad2 in Mesangial Cells In Vitro and In Vivo."J Am Soc Nephrol. 10巻. 581 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] Kato K: "Smad7,but not Smad6,inhibits transforming growth factor-β-mediated growth inhibition and differentiation in vascular smooth muscle cells"Circulation. 100巻18号. 616 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] Fujisawa M: "Inhibited T(iF-β1 activation and atherosclerosis in hemodialysis patients."J Am Soc Nephrol. 10巻. 279 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] Ishisaki A: "Differential inhibition of Smad6 and Smad7 on bone morphogenetic protein-and activin-mediated growth arrest and apoptosis in B cells"J Biol Chem. 274巻19号. 13637-136342 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] Kashiwagi M: "Locally activated renin-angiotensin system associated TGF-β1 as a major factor for renal injury induced by chronic inhibition of nitric oxide synthase in rats."J Am Soc Nephrol.. (印刷中).

    • Related Report
      1999 Annual Research Report

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Published: 1999-04-01   Modified: 2016-04-21  

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