Abstract
This study was performed to elucidate the protection afforded by post-treatment with Betoptic (0.25% betaxolol) against neuronal cell damage after ischemia/reperfusion insult in rats. Betaxolol was applied topically after the start of reperfusion and its effect was evaluated by morphometry and choline acetyltransferase immunoreactivity of retinas at 7 days after reperfusion. In non-treated eyes, the thickness of the inner plexiform layer decreased markedly after a reperfusion period of both 3 and 7 days. However, when eyes were treated with betaxolol after ischemia/reperfusion injury, both the reduction of the inner plexiform layer thickness and the retinal choline acetyltransferase immunoreactivity were significantly attenuated. These findings suggest that betaxolol is an efficient neuroprotective agent and prevents the retinal cell damage induced by ischemic injury in rats.
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