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• W2073512453 abstract "Abstract In this study, we investigated whether intraocular gene transfer of pigment epithelium‐derived factor (PEDF) ameliorates the extent of light‐induced photoreceptor cell death. Lewis rats received intravitreous injection of 3 × 10 9 particles of adenoviral vector expressing PEDF (AdPEDF.11) in one eye and 3 × 10 9 particles of empty adenoviral vector (AdNull.11) in the contralateral eye. The rats were then dark‐adapted for 3 days after which they were continuously exposed to fluorescent light (2,500 lux) for 0, 6, 24, 96, and 168 h. Both eyes were then enucleated and processed for morphometric analysis. Cell death in the retina was examined using TUNEL staining with a propidium iodide counterstain. The photoreceptor cell counts in each of the three groups were significantly different ( P < 0.001). Eyes that received intravitreous injection of AdNull.11 or no injection showed a greater number of pyknotic photoreceptor cells and a reduced photoreceptor cell density as compared to eyes treated with intravitreous AdPEDF.11 injection. AdNull.11 treated eyes showed a lesser but still significant protection of photoreceptor cells when compared to untreated eyes. Fewer TUNEL‐positive photoreceptor cells were present in AdPEDF.11 treated eyes than in AdNull.11 treated or untreated eyes ( P = 0.004). The amplitudes of the ERG a‐wave, b‐wave, and oscillatory potentials (OPs) were increased significantly by treatment ( P < 0.05). These data suggest that adenovirus vector‐mediated intraocular expression of PEDF significantly increases photoreceptor cell survival following excessive light exposure. Neuroprotection may result from inhibition of light‐induced apoptotic processes. This study provides proof of concept for a gene transfer approach to modulating retinal cell death resulting from photo‐oxidative damage and supports the hypothesis that gene transfer of PEDF is broadly applicable to modulating apoptosis in the retina. © 2004 Wiley‐Liss, Inc." @default.
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• W2073512453 date "2004-08-12" @default.
• W2073512453 modified "2023-10-15" @default.
• W2073512453 title "Intraocular gene transfer of pigment epithelium-derived factor rescues photoreceptors from light-induced cell death" @default.
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• W2073512453 doi "https://doi.org/10.1002/jcp.20155" @default.
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