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The investigation into an intreretinal pathology and a molecular biological mechanism of diabetic retinopathy

Research Project

Project/Area Number 13307049
Research Category

Grant-in-Aid for Scientific Research (A)

Allocation TypeSingle-year Grants
Section一般
Research Field Ophthalmology
Research InstitutionKYOTO UNIVERSITY

Principal Investigator

HONDA Yoshihito  Kyoto University, Department of Ophthalmology and Visual Science, Professor, 医学研究科, 教授 (90026930)

Co-Investigator(Kenkyū-buntansha) KIRYU Junichi  Kyoto University, Department of Ophthalmology and Visual Science, Lecturer, 医学研究科, 講師 (80281096)
TAKAGI Hitoshi  Kyoto University, Department of Ophthalmology and Visual Science, Lecturer, 医学研究科, 講師 (70283596)
KASHII Satoshi  Kyoto University, Department of Ophthalmology and Visual Science, Associate Professor, 医学研究科, 助教授 (50194717)
SUZUWA Kiyoshi  Kyoto University, Department of Ophthalmology and Visual Science, Lecturer, 医学研究科, 助手 (80335265)
高橋 政代  京都大学, 医学研究科, 助教授 (80252443)
西脇 弘一  京都大学, 医学研究科, 助手 (90303841)
Project Period (FY) 2001 – 2002
Project Status Completed (Fiscal Year 2002)
Budget Amount *help
¥42,380,000 (Direct Cost: ¥32,600,000、Indirect Cost: ¥9,780,000)
Fiscal Year 2002: ¥20,670,000 (Direct Cost: ¥15,900,000、Indirect Cost: ¥4,770,000)
Fiscal Year 2001: ¥21,710,000 (Direct Cost: ¥16,700,000、Indirect Cost: ¥5,010,000)
KeywordsLDL-receptor / ob / ob mouse / leptin / stetin / angiotensin / ATI receptor / diabetic retinopathy / VEGF / レニン-アンジオテンシン系 / LOLレセプター / Ang2 / AT1ノックアウトマウス / レニン・アンジオテンシン系 / 網膜血管増殖
Research Abstract

Vascular endothelial growth factor (VEGF) mediates such ischemia-induced ocular neovascularization as diabetic retinopathy and age-related macular degeneration. In this research, we investigated the molecular mechanism how VEGF is highly expressed in retinas of diabetic retinopathy. Lectin-like oxidized LDL receptor 1(LOX1) is assume to play an important role in VEGF hyperexpression. We reveal a role for LOX1 in cell adhesion in endotoxin-induced inflammation. (PNAS2003 ; 4 ; 100 ; 3 ; 1274-9) Statin inhibits leucocyte-endothelial interaction and prevents neuroral death induced by ischemia-reperfusion injury in the rat retina, so statin has potential of therapeutic drug in diabetic retinopathy. (Arch Ophthal 2002 ; 120 ; 12 ; 1707-13). Leptin is known to be highly concentrated in blood and vitreous of diabetic patients. Leptin has angiogenic effect and we revealed that in ob/ob mice vascular proliferation is inhibited, and VEGF expression is inhibited. (in press) We revealed angiotensin potentiates the expression of VEGF receptor and angiopoietin 2. (Diabetes 2001 ; 50 ; 867-875) These effects are mediated by angiotensin type 1 receptor. These reveals a possibility that the control of molecular mechanism in LDL receptor, leptin, and angiotensin2 leads to inhibition of early change in diabetic retinopathy.

Report

(3 results)
  • 2002 Annual Research Report   Final Research Report Summary
  • 2001 Annual Research Report
  • Research Products

    (16 results)

All Other

All Publications (16 results)

  • [Publications] Yamashiro K, et al.: "Suppressive effects of selectin inhibitor SKK-60060 on the leucocyte infiltration during endotoxin induced uveitis"Br J Ophthalmol. 87(4). 476-480 (2003)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Honjo M, et al.: "Lectin-like oxidized LDL receptor-1 is a cell-adhesion molecule involved in endotoxin-induced inflammation"Proe Natl Aead Sci USA. 100(3). 1274-1279 (2003)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Uemura A, et al.: "Recombinant angiopoietin-1 restores higher-order architecture of growing blood vessels in mice in the absence of mural cells"J Clin Invest. 110(11). 1619-1628 (2002)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Otani A, et al.: "Vascular ehdothelial growth factor family and receptor expression in human chroidal neovascular membranes"Microvasc Res. 64(1). 162-169 (2002)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Takagi H, et al.: "Role of vitronectin receptor-type integrins and osteopontin in ischemia-induced retinal neovascularization"Japn J Ophthalmol. 46(3). 270-278 (2002)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Takagi H, et al.: "Potential role of the angiopoietin/tie2 system in ischemia-induced retinal neovascularization"Invest Ophthalmol Vis Sci. 44(1). 393-402 (2003)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Yamoshiro K, et al.: "Suppressive effects of selectin inhibitor SKK-60060 on the leucocyte infiltration during endotoxin induced uveitis"Br J Ophthalmol.. 57(4). 476-480 (2003)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Honjo M, et al.: "Lectin-like oxidized LDL receptor-1 is a cell-adhesion molecule involved in endotoxin-induced inflammation"Proc Natl Acad Sci USA.. 100(3). 1274-1279 (2003)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Uemura A, et al.: "Recombinant angispoietin-1 restores higher-order architecture of growing blood vessels in mice in the absence of mural cells"J Clin Invest.. 110(11). 1619-1628 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Otani A, et al.: "Vascular endothelial growth factor family and receptor expression in human choroidal neovascular membranes"Microvasc Res.. 64(1). 162-169 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Takagi H, et al.: "Role of vitrenectin recepter-type integrin and osteopontin in ischemia-induced retinal neovascularization"Jpn Ophthalmol PMID : 12063036 [Pub Med - indexed for MEDLINE]. 46(3). 270-278 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Takagi H, et al.: "Potential role of the angiopoietin/tie2 system in ischsmia-induced retinal neovascularization"Invent Ophthalmol Via Sci.. 44(1). 393-402 (2003)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Otani A, Takagi H, Oh H, Koyama S, Honda Y: "Angiotensin-II induces expression of the Tie2 receptor ligand, angiopoietin-2, in bovine retinal endothelial cells"Diabetes. 50. 867-875 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] Otani A, Takagi H, Oh H, Koyama S, Ogura Y, Matsumura M, Honda Y: "Vascular Endothelial Growth Factor Family and Receptor Expression in Human Choroidal Neovascular Membranes"Micrevascular Res.. (in press).

    • Related Report
      2001 Annual Research Report
  • [Publications] Takagi H, Suzuma K, Otani A, Oh H, Koyama S, Ohashi H, Honda Y: "Role of Vitronectin Receptor-Type Integrins and Osteopontin in Ischemia-Induced Retinal NeovascuIarization"Jpn J Ophthalmol. (in press).

    • Related Report
      2001 Annual Research Report
  • [Publications] Miyamoto M, Manaki M, Takagi H, Suzuma I, Suzuna S, Honda Y: "Contrasting Effect of Estrogen on VEGF Induction under Different Oxygen Status and Its Role in Murine Retinopathy of Prematuity"Invest Ophthalmol Vis Sci. (in press).

    • Related Report
      2001 Annual Research Report

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Published: 2001-04-01   Modified: 2016-04-21  

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