Reduced choroidal neovascular membrane formation in cyclooxygenase-2 null mice

Kasra A. Rezaei, Hassanain S. Toma, Jiyang Cai, John S. Penn, Paul Sternberg, Stephen J. Kim

Research output: Contribution to journalArticle

21 Scopus citations

Abstract

Purpose. To assess the degree of laser-induced choroidal neo-vascular membrane formation in wild-type (WT) and COX-2 null mice and to measure vascular endothelial growth factor (VEGF), interleukin (IL)-1, and tumor necrosis factor (TNF)-α levels in the retina and choroid. Methods. Four laser burns were placed in each eye of WT and COX-2 null mice to induce choroidal neovascularization. Fluorescein angiography (FA) was performed at 14 days, and retinal pigment epithelium-choroid-sclera (choroidal) flat mounts were prepared. The retina and choroid were isolated from WT and COX-2 null mice at 24, 72, and 168 hours after laser photocoagulation and from unlasered eyes and were tested for VEGF, IL-1β, and TNF-α. Results. COX-2 null mice demonstrated 58% (P = 0.001) and 48% (P = 0.001) reductions in CNV formation on FA and choroidal flat mounts, respectively, compared with WT mice. For unlasered mice, mean VEGF concentrations in the retina and choroid were 1.2 ± 0.42 pg/mg protein for WT but only 0.42 ±0.2 pg/mg protein for COX-2 null mice (P < 0.05). After laser photocoagulation, WT mice showed significantly greater VEGF and IL-β expression in the retina and choroid by 168 hours (P < 0.05) and 72 hours (P < 0.05), respectively, compared with COX-2 null mice. Conclusions. COX-2 null mice exhibited significantly less choroidal neovascular membrane formation associated with reduced expression of VEGF. The results of this study suggest that COX-2 modulates VEGF expression in CNV and implicates a potential therapeutic role for nonsteroidal anti-inflammatory drugs.

Original languageEnglish (US)
Pages (from-to)701-707
Number of pages7
JournalInvestigative Ophthalmology and Visual Science
Volume52
Issue number2
DOIs
StatePublished - Feb 1 2011

ASJC Scopus subject areas

  • Ophthalmology
  • Sensory Systems
  • Cellular and Molecular Neuroscience

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