2002 Fiscal Year Final Research Report Summary
The investigation into an intreretinal pathology and a molecular biological mechanism of diabetic retinopathy
| Project/Area Number |
13307049
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| Research Category |
Grant-in-Aid for Scientific Research (A)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Ophthalmology
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| Research Institution | KYOTO UNIVERSITY |
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Principal Investigator |
HONDA Yoshihito Kyoto University, Department of Ophthalmology and Visual Science, Professor, 医学研究科, 教授 (90026930)
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| 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)
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| Project Period (FY) |
2001 – 2002
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| Keywords | LDL-receptor / ob / ob mouse / leptin / stetin / angiotensin / ATI receptor / diabetic retinopathy |
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| 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.
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