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Sodium nitroprusside selectively induces apoptotic cell death in the outer retina of the rat. 2001
Department of Anatomy, College of Medicine, The Catholic University of Korea, 505 Banpo-dong, Socho-gu, Seoul 137-701, Korea.
Sodium nitroprusside (SNP), an NO donor, was studied for its effects on apoptosis in rat retinal neurons. TUNEL-positive cells were observed in the outer nuclear layer (ONL), but not in the inner retina after SNP treatment. Inner retinal neurons died by necrosis. No photoreceptor cells were found in the ONL after seven days. Immunoblotting confirmed that neurnal NO synthase expression increased up to 5 days (approximately 170% of control levels), and then declined by 7 days, suggesting that NO induces apoptosis in the ONL, and that inner retinal neurons die by necrosis due to glutamate from damaged photoreceptors.
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