Hypoxia precedes the development of experimental preretinal neovascularization.

Published

Journal Article

BACKGROUND: Although the mechanism of preretinal neovascular growth in the cell-injected rabbit eye model is not known, it has been proposed that the initial vasodilation and eventual development of neovascularization may be attributable to inflammatory mediators. However, an alternative explanation involving hypoxia has not been considered. The purpose of this study was to measure preretinal oxygen tension prior to the development of preretinal neovascularization in the cell-injected rabbit eye. METHODS: In the rabbit, intravitreous injections of 250,000 homologous dermal fibroblasts were performed on one eye; the fellow (control) eye was injected with vehicle. Preretinal oxygen tension over the myelin wing was measured using 19F-NMR spectroscopy of a 30-microliters droplet of perfluorocarbon previously injected into the preretinal vitreous. RESULTS: Compared to control eyes, fibroblast-injected eyes showed a 1.7-fold decrease in preretinal oxygen tension from the first time studied (1 day after cell injection) through the development of visible neovascularization. Hypoxia occurred without coexisting ophthalmoscopic evidence of vascular occlusion or, on days 1 and 3 after cell injection, retinal detachment. CONCLUSION: This result demonstrates for the first time that preretinal hypoxia precedes the development of preretinal neovascularization in the fibroblast-injected rabbit eye.

Full Text

Duke Authors

Cited Authors

  • Handa, JT; Berkowitz, BA; Wilson, CA; Ando, N; Sen, HA; Jaffe, GJ

Published Date

  • January 1, 1996

Published In

Volume / Issue

  • 234 / 1

Start / End Page

  • 43 - 46

PubMed ID

  • 8750849

Pubmed Central ID

  • 8750849

International Standard Serial Number (ISSN)

  • 0721-832X

Digital Object Identifier (DOI)

  • 10.1007/bf00186517

Language

  • eng

Conference Location

  • Germany