| Project/Area Number |
12671711
|
|---|
| Research Category |
Grant-in-Aid for Scientific Research (C)
|
| Allocation Type | Single-year Grants |
|---|
| Section | 一般 |
|---|
| Research Field |
Ophthalmology
|
|---|
| Research Institution | Kyushu University |
|---|
Principal Investigator |
MURATA Toshinori Kyushu University, Associate, 医学部・附属病院, 助手 (50253406)
|
|---|
| Co-Investigator(Kenkyū-buntansha) |
ISHIBASHI Tatsuro Kyushu University, Professor, 大学院・医学研究院, 教授 (30150428)
|
|---|
| Project Period (FY) |
2000 – 2001
|
| Project Status |
Completed (Fiscal Year 2001)
|
| Budget Amount *help |
¥3,900,000 (Direct Cost: ¥3,900,000)
Fiscal Year 2001: ¥1,400,000 (Direct Cost: ¥1,400,000)
Fiscal Year 2000: ¥2,500,000 (Direct Cost: ¥2,500,000)
|
|---|
| Keywords | advaenced glycation end products / monocyte chemoattractant protein-1 / angeiogenesis / macrohpages / age related macular degeneration / In situ hybridization / 加齢黄班変性 / AGEs / 網膜色素上皮細胞 |
|---|
| Research Abstract |
The aim of the present study was to elucidate the mechanisms how the advanced glycation end products (AGEs) that deposited in soft drusen induce macrophage infiltration. We hypothesized that these macrophages induce choroidal neovasclarization. The following results were obtained in this study.
1) AGEs induce an overexpression of monocyte chemoattractant protein-1 (MCP-1) in the cultured retinal pigment epithelial (RPE) cells.
An overexpression of MCP-1 when stimulated by AGEs was detected by ELISA. In the surgical specimens, the RPE cells that had phagocytosed AGEs were positive for MCP-1 by immunohistochemistry. The adjacent macrophages were positive for tumor necrosis factor-1 (TNF- 1) and Inteleukin-1β (IL-1β). These cytokines then induced over-expression of vascular endothelial growth factor (VEGF) that has been reported to be the key angiogenic factor for choroidal neovasclarization.
2) Sub-RPE cells deposition of AGEs induce macrophage infiltration into this space.
AGEs were injected into the sub-retinal space of the rat eyes, which Induced a prominent macrophage Infiltration.
|
