| Project/Area Number |
10557014
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| Research Category |
Grant-in-Aid for Scientific Research (B).
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| Allocation Type | Single-year Grants |
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| Section | 展開研究 |
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| Research Field |
General medical chemistry
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| Research Institution | KYUSHU UNIVERSITY |
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Principal Investigator |
ONO Mayumi Dept.of Med.Biochemistry, Grad.Sch.of Med.Sciences, KYUSHU UNIVERSITY, Associate Professor, 大学院・医学研究院, 講師 (80128347)
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| Co-Investigator(Kenkyū-buntansha) |
IKEZAKI Kiyonobu Dept.of Neurosurgery, Grad.Sch.of Med.Sciences, KYUSHU UNIVERSITY, Associate Professor, 大学院・医学研究院, 講師 (10145360)
ISHIBASHI Tatsuro Dept.of Ophthalmology, Grad.Sch.of Med.Sciences, KYUSHU UNIVERSITY, Associate Professor, 大学院・医学研究院, 助教授 (30150428)
IAWAMOTO Yukihide Dept.of Orthopaedic Surgery, Grad.Sch.of Med.Sciences, KYUSHU UNIVERSITY, Professor, 大学院・医学研究院, 教授 (00213322)
内海 健 九州大学, 大学院・医学系研究科, 助手 (80253798)
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| Project Period (FY) |
1999 – 2000
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| Project Status |
Completed (Fiscal Year 2000)
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| Budget Amount *help |
¥7,000,000 (Direct Cost: ¥7,000,000)
Fiscal Year 2000: ¥3,200,000 (Direct Cost: ¥3,200,000)
Fiscal Year 1999: ¥3,800,000 (Direct Cost: ¥3,800,000)
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| Keywords | tumor angiogenesis / macrophage infiltration / thymidine phosphory lase(TP) / heme oxygenase-1(HO-1) / diabetic retinopathy / advanced glycation end / products(AGEs) / rheumatoid arthritis(RA) / 血管新生阻害剤 / VEGF / 糖尿病網膜症 / MMP / 虚血 / ディファレンシャルディスプレイ法 / アクチビン / 血管新生病 / 血管促進因子 / 血管抑制因子 / ディファレンシャル・ディスプレイ法 / insituハイブリダイゼーション / 酸素ストレス / 血管内皮細胞 |
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| Research Abstract |
Angiogenesis is closely associated with physiolocical condition such as tumor, diabetic retinopathy and rheumatoid arthritis. To understand the molecular mechanism invoived in these angiogenesis disease leads to a new therapy.
A) Angiogenesis is a complex process in cross-talks with environmental stimuli and stroma cells in host. It was observed that infiltration of monocytes/macrophages are closely associated with tumor angiogenesis status. We found that 1) infiltration of macrophages was closely associated with malignancy and microvessel density in human melanoma ; 2) infiltrated macrophage express thymidine phosphorylase (TP) and heme oxygenase-1 (HO-1), which could be the biological markers of tumor infiltrating macrophage ; 3) of various cytokines interferon-γ(IFN-γ) most effectively the expression of TP through GAS element in the promoter region of TP gene.
B) In patients with diabetic retinopathy, we have found increased expression of VEGF around retinal vessels and accumulation of advanced glycation end products (AGES). We observed that AGES were the major stimulus for expression of VEGF and that glycemic control agents could reduce the incidence of neovascularization through inhibition of signaling transduction of retinal endothelial cells in diabetic eyes.
C) Rheumatoid arthritis (RA) is an arthritic disease characterized by extensive neovascularization in synovial tissue leading to pannus formation with large number of newly-formed blood vessels and bone resorbing osteoclasts. We found that angiogenesis inhibitor prevented bone and joint destruction in experimental arthritis. Angiogenesis inhibitor might be one of the new strategy for treatment of RA.
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