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Role of anti-adhesin, podocalyxin and adaptor proteins in glomerular injury

Research Project

Project/Area Number 16590783
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Kidney internal medicine
Research InstitutionNiigata University

Principal Investigator

TAKEDA Tetsuro  Niigata University, Medical and Dental Hospital, Assistant, 医歯学総合病院, 助手 (10361924)

Co-Investigator(Kenkyū-buntansha) SAITO Akihiko  Niigata University, Graduate School of Medical and Dental Science, Associate Professor, 大学院・医歯学総合研究科, 客員助教授 (80293207)
Project Period (FY) 2004 – 2005
Project Status Completed (Fiscal Year 2005)
Budget Amount *help
¥3,700,000 (Direct Cost: ¥3,700,000)
Fiscal Year 2005: ¥700,000 (Direct Cost: ¥700,000)
Fiscal Year 2004: ¥3,000,000 (Direct Cost: ¥3,000,000)
Keywordsrenal glomerulus / protein-protein interaction / phosphorylation / adaptor protein / podocyte
Research Abstract

We have previously demonstrated that anti-adhesin molecule, podocalyxin binds to the second PDZ domain of NHERF2 and ezrin in vitro and in vivo and that the interaction is important to maintain the unique organization of podocyte structure. In this research project, we investigated how the adaptor proteins interact with podocalyxin in glomerular injury.
1. We found that phosphrylation status of podocalyxin/NHERF2/ezrin comlex linked to the golmerular injury.
2. We identified the protein which interacted with first PDZ domain of NHERF2 by yeast two-hybrid system. Surprisingly, it was NHERF2 itself. This self-interaction was confirmed by GST pull-down assay and co-immunoprecipitation and was disrupted in severe injured glomeruli.
3. We analyzed the endocytic function of mouse immortalized glomerular epithlial cells that was established by Dr. Mundel like as in vivo millue.
4. We also found that the interaction between podocalyxin and adaptor proteins of above cell line was reduced in propotion to the angioteinsin II concentration.
5. When highly polarized MDCK cells were transfected to express podocalyxin, the adaptor proteins were re-localized to the apical submembranous domain and small G-protein, Rho A was activated. These results suggest podocalyxin may lead the adaptor proteins re-locate to the apical domain through the activation of Rho A.

Report

(3 results)
  • 2005 Annual Research Report   Final Research Report Summary
  • 2004 Annual Research Report
  • Research Products

    (13 results)

All 2005 2004

All Journal Article (12 results) Book (1 results)

  • [Journal Article] Evidence for megalin-mediated proximal tubular uptake of L-FABP, a carrier of potentially nephrotoxic molecules2005

    • Author(s)
      Oyama Y, Takeda T, Hama H, Tanuma A, Iino N, Sato K, Kaseda R, Ma M,..., Gejyo F, Saito A
    • Journal Title

      Laboratory Investigation 85(4)

      Pages: 522-531

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Role of megalin, a proximal tubular endocytic receptor, in the pathogenesis of diabetic and metabolic syndrome-related nephropathies : protein metabolic overload hypothesis2005

    • Author(s)
      Saito A, Takeda T, Hama H, Oyama Y, Hosaka K, Tanuma A, Kaseda R, Ueno M, Nishi S,..., Gejyo F
    • Journal Title

      Nephrology 10(S2)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Significance of proximal tubular metabolism of advanced glycation end products in kidney diseases2005

    • Author(s)
      Saito A, Takeda T, Sato K, Hama H, Tanuma A, Kaseda R, Suzuki Y, Gejyo F
    • Journal Title

      Annals of the New York Academy of Sciences 1043

      Pages: 637-643

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Evidence for megalin-mediated proximal tubular uptake of L-FABP, a carrier of potentially nephrotoxic molecules2005

    • Author(s)
      Oyama Y, Takeda T, et al.
    • Journal Title

      Laboratory Investigation 85

      Pages: 522-531

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Role of megalin, a proximal tubular endocytic receptor, in the pathogenesis of diabetic and metabolic syndrome-related nephropathies : protein metabolic overload hypothesis2005

    • Author(s)
      Saito A, Takeda T, et al.
    • Journal Title

      Nephrology 10

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Significance of proximal tubular metabolism of advanced glycation end products in kidney diseases2005

    • Author(s)
      Saito A, Takeda T, et al.
    • Journal Title

      Annals of the New York Academy of Sciences 1043

      Pages: 637-643

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Podocalyxin activates RhoA and induces actin reorganization through NHERF1 and Ezrin in MDCK cells2004

    • Author(s)
      Schmieder S, Nagai M, Orlando RA, Takeda T, Farquhar MG
    • Journal Title

      Journal of the American Society of Nephrology 15(9)

      Pages: 2289-2298

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Evidence indicating that renal tubular metabolism of leptin is mediated by megalin but not by the leptin receptors2004

    • Author(s)
      Hama H, Saito A, Takeda T, Tanuma A, Xie Y, Sato K, Kazama JJ, Gejyo F
    • Journal Title

      Endocrinology 145(8)

      Pages: 3935-3940

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Differentiation-induced cultured podocytes express endocytically active megalin, a heymann nephritis antigen2004

    • Author(s)
      Yamazaki H, Saito A, Ooi H, Kobayashi N, Mundel P, Gejyo F
    • Journal Title

      Nephron Experimental Nephrology 96(2)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Podocalyxin activates RhoA and induces actin reorganization through NHERF1 and Ezrin in MDCK cells2004

    • Author(s)
      Schmieder S, Nagai M, Orlando RA, Takeda T, Farquhar MG
    • Journal Title

      Journal of the American Society of Nephrology 15

      Pages: 2289-2298

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Evidence indicating that renal tubular metabolism of leptin is mediated by megalin but not by the leptin receptors2004

    • Author(s)
      Hama H, Saito A, Takeda T, et al.
    • Journal Title

      Endocrinology 145

      Pages: 3935-3940

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Differentiation-induced cultured podocytes express endocytically active megalin, a heymann nephritis antigen2004

    • Author(s)
      Yamazaki H, Saito A, et al.
    • Journal Title

      Nephron Experimental Nephrology 96

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Book] 「糸球体上皮細胞でのポドカリキシンの役割」Annual Review腎臓2004(伊藤克己、遠藤仁、御手洗哲也、東原英二、秋澤忠男編)2004

    • Author(s)
      竹田徹朗, 下条文武
    • Total Pages
      6
    • Publisher
      中外医学社
    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary

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Published: 2004-04-01   Modified: 2016-04-21  

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