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• W2059731610 abstract "Abstract: Dysfunctions of the (S)-α-amino-3-hydroxy-5-methylisoxazole-4-propionate (AMPA) subtype of ionotropic receptor for the brain's major excitatory neurotransmitter, L-glutamate, occur in various neurological conditions. We have previously demonstrated that AMPA receptor-mediated excitotoxicity occurs by apoptosis and here examined the influence of the expression of cell death repressor gene Bcl-2 on this excitotoxic insult. Using neuronal cortical cultures prepared from transgenic mice expressing the human Bcl-2 gene, the influence of Bcl-2 on AMPA receptor-mediated neuronal death was compared with that seen with staurosporine and H2O2. At day 6 cultures were exposed to AMPA (0.1-100 μM), and cellular injury was analyzed 48 h after insult using phase-contrast microscopy, a 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide viability assay, and DNA staining with 4,6-diamidino-2-phenylindole and Sytox Green. AMPA produced a concentration-dependent increase in cell death that was significantly attenuated by human Bcl-2. AMPA (3 μM) increased the number of apoptotic nuclei to 60% of control in wild-type cultures, and human Bcl-2 significantly decreased the number of apoptotic nuclei to 30% of AMPA-treated cultures. Human Bcl-2 only provided significant neuroprotection against neuronal injury induced by low concentrations of staurosporine (1-10 nM) and H2O2 (0.1-30 μM) and where neuronal death was by apoptosis, but not against H2O2-induced necrosis. Our findings indicate that overexpression of Bcl-2 in primary cultured neurons protects in an insult-dependent manner against AMPA receptor-mediated apoptosis, whereas protection was not seen against more traumatic insults. This study provides new insights into the molecular therapeutics of neurodegenerative conditions." @default.
• W2059731610 created "2016-06-24" @default.
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• W2059731610 date "2002-01-18" @default.
• W2059731610 modified "2023-09-29" @default.
• W2059731610 title "Human Bcl-2 Protects Against AMPA Receptor-Mediated Apoptosis" @default.
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• W2059731610 doi "https://doi.org/10.1046/j.1471-4159.2000.0741613.x" @default.
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