1992 Fiscal Year Final Research Report Summary
Dejtnerution and proliferative membrant of glial cells cue to retinul dtuc*at
| Project/Area Number |
03670828
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| Research Category |
Grant-in-Aid for General Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Research Field |
Ophthalmology
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| Research Institution | KYOTO UNIVERSITY |
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Principal Investigator |
MIYAO Matsumura Kyoto Univ. Faculty of Medicine assistant prof, 医学部, 講師 (30144380)
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| Co-Investigator(Kenkyū-buntansha) |
IWAKI Musayoshi Kyoto Univ. Faculty of Medicine. research fellow, 医学部, 助手 (10093163)
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| Project Period (FY) |
1991 – 1992
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| Keywords | proliferative diabetic retinopathy / neovascular tissue / immunohistochemical / collagen / GFAP / fibronectin |
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| Research Abstract |
Intravitreal neovascular tissue in 8 cases of proliferative diabetic retinopathy was investigated using immunohistochemical techniques. All 8 cases yielded positive immunoreactivity for type II collagen (vitreous collagen). The intravitreal neovascular tissue was classified into two groups (A or B), depending upon the distribution of type I collagen. In group A (3 cases), blood vessels were entirely surrounded by vitreous collagen, and in group B (5 cases), the vessels proliferated on one side of a mass of vitreous collagen. Type I and III collagens were distributed diffusely within the extracellular space of the tissue, whereas type IV collagen and fibronectin (FN) formed a basement membrane-like foundation for the newly formed vessels. Glial fibrillary acidic protein (GFAP)-immunoreactive cells were not clearly detected in any of the cases. Neovascular tissue typically proliferated on the posterior vitreous surface (as found in group B), but was also found to penetrate the vitreous gel (as found in group A). As neovascular tissue proliferation proceeded, types I,III and IV collagens and FN were produced. Glial cells (GFAP-positive cells) were not essential for neovascular tissue formation.
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