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Effects of radical suppression in diabetic nephropathy

Research Project

Project/Area Number 12671025
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Kidney internal medicine
Research InstitutionThe University of Tokyo

Principal Investigator

TOJO Akihiro  The University of Tokyo, Dept, of Medicine, assistant, 医学部・附属病院, 助手 (50292917)

Project Period (FY) 2000 – 2001
Project Status Completed (Fiscal Year 2001)
Budget Amount *help
¥1,300,000 (Direct Cost: ¥1,300,000)
Fiscal Year 2001: ¥600,000 (Direct Cost: ¥600,000)
Fiscal Year 2000: ¥700,000 (Direct Cost: ¥700,000)
KeywordsNitric oxide / superoxide / NADPH oxidase / NOS / diabetic nephropathy / micro albuminuria / angiotensin II / immuno electron microscope / superoxide / Immuno electron microscope / lipid peroxidation / Angiotensin II
Research Abstract

In this study, we investigated the role of free radicals in the diabetic nephropathy. The superoxide anions are produced by NADPH oxidase. We revealed that. NADPH oxidase isoforms exist in the podocyte, glomerular endothelium, macula densa, distal convoluted tubule and fibroblast. In the hypertension model, SHR, NADPH oxidase expression in the kidney is enhanced contributing to the increase in tubuloglomerular feedback response. In the streptozotocin-induced diabetic rats, renal expression of NADPH oxidase is also enhanced and its products were increased in the urine and kidney associated with microalbuminuria. The enhanced radicals damage tubular endocytosis process of albumin via megalin in the proximal tubule, and this may contribute to microalbuminuria in the early stage of diabetic rats. As NADPH oxidase is regulated by angiotensin II, ACE inhibitor and AT1 receptor blocker (ARE) suppress the expression of NADPH oxidase and reduce radical production and microalbuminuria. The treatment with ACE inhibitor and ARE show a renoprotective effect via suppression of NADPH oxidase.

Report

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

    (33 results)

All Other

All Publications (33 results)

  • [Publications] Onozato ML, Tojo A, Goto A, Fujita T, Wilcox CS: "Oxidative stress and NOS in rat diabetic nephropathy : Effects of ACEI or ARB"Kidney Int. 61. 186-194 (2002)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Tlnatin Chabrashvili, Akihiro Tojo, Maristela Lika Onozato, Chagriya Kitiyakara, Mark T.Quinn, Toshiro Fujita, William J.Welch, Christopher S.Wilcox: "Expression and Cellular Localization of Classic NADPH Oxidase Subunits in the Spontaneously Hypertensive Rat Kidney"Hypertension. 39. 269-274 (2002)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Tojo A, Onozato ML, Ha H, Kurihara H, Sakai T, Goto A, Fujita T, Endou H: "Reduced albumin reabsorption in the proximal tubule of early-stage diabetic rats"Histochem Cell Biol. 116. 269-276 (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Narumi S, Onozato ML, Tojo A, Sakamoto S, Tamatani T: "Tissue-specific induction of E-selectin in glomeruli is augmented following diabetes mellitus"Nephron. 89(2). 161-171 (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Onozato ML, Tojo A, Kamijo S, Taniguchi S, Kimura K, Goto A, Fujita T: "Tubulointerstitial nephritis associated with acute intermittent porphyria"Clin Nephrol. 55. 171-174 (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Tojo A, Kimoto M, Wilcox CS: "Renal expression of constitutive NOS and DDAH : separate effects of salt intake and angiotensin"Kidney Int.. 58(5). 2075-2083 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Welch WJ, Tojo A, Wilcox CS: "Roles of NO and oxygen radicals in tubuloglomerular feedback in SHR"Am J Physiol. 278. F769-F776 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Ookata K, Tojo A, Suzuki Y, Nakamura N, Kimura K, Wilcox CS, Hirose S: "Localization of inward rectifier potassium channel kir7.1 in the basolateral membrane of distal nephron and collecting duct"J Am Soc Nephrol. 11. 1987-1994 (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Ookata K, Tojo A, Onozato ML, Kasiwagi M, Honda S, Hirose S: "Distribution of stanniocalcin 1 in the apical membranes of the distal nephron of rat kidney and its regulation by vitamin D3"Exp Nephrol. 9. 428-435 (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] 藤乗嗣泰: "一酸化窒素と酸化ストレス 先端医療シリーズ13 腎臓病の最新医療"先端医療技術研究所. 59-62 (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Onornto ML. Tojo A, Goto A, Fujita T, Wilcox CS :: "Oxidative stress and NOS in rat diabetic nephropathy : Effects of ACEI or ARB"Kidney Int. 61. 186-194 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Tinatin Chabrashvili, Akihiro Tojo, Maristela Lika Onozato, Chagriya Kitiyakara, Mark T. Quinn, Toshiro Fujita, William J. Welch, and Christopher S. Wilcox: "Expression and Cellular Localization of Classic NADPH Oxidase Subunits in the Spontaneously Hypertensive Rat Kidney"Hypertension. 39. 269-274 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Tojo A Onozato ML, Ha H, Kurihara H, SaKai T, Goto A, Fujita T, Endou H: "Reduced albumin reabsorption in the proximal tubule of early-stage diabetic rats"Histochem Cell Biol. 116. 269-276 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Narumi S, Onozato ML, Tojo A, Sakamoto S, Tamatani T: "Tissue-specific induction of E-selection in glomeruli is augmented following diabetes mellitus"Nephron. 89(2). 161-171 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Onozato ML, Tojo A, Kamijo S, Taniguchi S, Kimura K, Goto A, Fujita T: "Tubulointerstitial nephritis associated with acute intermittent porphyria"Clin Nephrol. 55. 171-174 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Welch WJ, Tojo A, Wilcox CS: "Roles of NO and oxygen radicals in tubuloglomerular feedback in SHR"Am J Physiol. 278. F769-F776 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Tojo A, Kimoto M, Wilcox CS: "Renal expression of constitutive NOS and DDAH : Separate effects of salt intake and angiotensin"Kidney Int. 58(5). 2075-2083 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Ookata K, Tojo A, Suzuki Y, Nakamura N, Kimura K, Wilcox CS, Hirose S: "Localization of inward rectifier potassium channel kir7.1 in the basolateral membrane of distal nephron and collecting duct"J Am Soc Nephrol. 11. 1987-1994 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Ookata K, Tojo A, Onozato ML, Kasiwagi M, Honda S, Hirose S: "Distribution of stanniocalcin 1 in the apical membranes of the distal nephron of rat kidney and its regulation by vitamin D3"Exp Nephrol. 9. 428-435 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Tojo A: "NO and Oxidative Stress Advances in Medicine Series 13 Frontiers of Nephrology 2001"Institute of Advanced Medicine. p. 59-p. 62 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Onozato ML, Tojo A, Goto A, Fujita T, Wilcox CS: "Oxidative stress and NOS in rat diabetic nephropathy : Effects of ACEI or ARB"Kidney Int. 61. 168-194 (2002)

    • Related Report
      2001 Annual Research Report
  • [Publications] Tinatin Chabrashvili, Akihiro Tojo, Maristela Lika Onozato, Chagriya Kitiyakara, Mark T, Quinn, Toshiro Fujita, William J, Welch, Christopher S, Wilcox: "Expression and Cellular Localization of Classic NADPH Oxidase Subunits in the Spontaneously Hypertensive Rat Kidney"Hypertension. 39. 269-274 (2002)

    • Related Report
      2001 Annual Research Report
  • [Publications] Tojo A, Onozato ML, Ha H, Kurihara H, Sakai T, Goto A, Fujita T, Endou H: "Reduced albumin reabsorption in the proximal tubule of early-stage diabetic rats"Histochem Cell Biol. 116. 269-276 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] Narumi S, Onozato ML, Tojo A, Sakamoto S, Tamatani T: "Tissue-specific induction of E-selectin in glomeruli is augmented following diabetes mellitus"Nephron. 89(2). 161-171 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] Onozato ML, Tojo A, Kamijo S, Taniguchi S, Kimura K, Goto A, Fujita T: "Tubulointerstitial nephritis associated with acute intermittent porphyria"Clin Nephrol. 55. 171-174 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] Tojo A, Kimoto M, Wilcox CS: "Renal expression of constitutive NOS and DDAH: separate effects of salt intake and angiotensin"Kidney Int. 58(5). 2075-2083 (2000)

    • Related Report
      2001 Annual Research Report
  • [Publications] 藤乗嗣泰: "一酸化窒素と酸化ストレス 先端医療シリーズ13腎臓病の最新医療"先端医療技術研究所. 52-62 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] Tojo A,Kimoto M,Wilcox CS.: "Renal expression of constitutive NOS and DDAH : separate effects of salt intake and angiotensin."Kidney Int.. 58(5). 2075-83 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] Welch WJ,Tojo A,Wilcox CS.: "Roles of NO and oxygen radicals in tubuloglomerular feedback in SHR."Am J Physiol. 278. F769-F776 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] Tojo A,Bredt DS,Wilcox CS.: "Distribution of postsynaptic density proteins in rat kidney : Relationship to neuronal nitric oxide synthase."Kidney Int. 55. 1384-1394. (1999)

    • Related Report
      2000 Annual Research Report
  • [Publications] Onozato ML,Tojo A,Kamijo A,Taniguchi S,Kimura K,Goto A,Fujita T: "Tubulointerstitial nephritis associated with acute intermittent porphyria."Clin Nephrol. 55. 171-174. (2001)

    • Related Report
      2000 Annual Research Report
  • [Publications] Ookata K,Tojo A,Suzuki Y,Nakamura N,Kimura K,Wilcox CS,Hirose S.: "Localization of inward rectifier potassium channel kir7.1 in the basolateral membrane of distal nephron and collecting duct."J Am Soc Nephrol.. 11(11). 1987-94. (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] Narumi S,Onozato ML,Tojo A,Sakamoto S,Tamatani T.: "Tissue-specific induction of E-selectin in glomeruli is augmented following diabetes mellitus."Nephron. (in press).

    • Related Report
      2000 Annual Research Report

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

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