Unbalanced expression of VEGF and PEDF in ischemia-induced retinal neovascularization - PubMed (original) (raw)
Unbalanced expression of VEGF and PEDF in ischemia-induced retinal neovascularization
G Gao et al. FEBS Lett. 2001.
Free article
Abstract
Retinal levels of vascular endothelial growth factor (VEGF) and pigment epithelium-derived factor (PEDF), an angiogenic inhibitor, were measured and correlated with the ischemia-induced retinal neovascularization in rats. The retinas with neovascularization showed a 5-fold increase in VEGF while 2-fold decrease in PEDF, compared to the age-matched controls, resulting in an increased VEGF/PEDF ratio. The time course of the VEGF/PEDF ratio change correlated with the progression of retinal neovascularization. Changes in the VEGF and PEDF mRNAs preceded their protein level changes. These results suggest that an unbalance between angiogenic stimulators and inhibitors may contribute to retinal neovascularization.
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