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- W2014080232 abstract "We show that excitotoxic cell death, which is associated with pathological neurodegenerative processes, can display morphological and biochemical features characteristic of apoptosis, a mode of cell death typical of physiological neuronal elimination during development. Cortical neurons cultured in the absence of serum, stimulated with NMDA, glutamate, or quisqualate after 3-5 days in vitro, showed significant degeneration. This death was blocked by 1 microM MK-801, indicating that it was mediated by the activation of NMDA receptors. Dying cells displayed an apoptotic morphology, characterized by cytoplasm and chromatin condensation. No internucleosomal DNA degradation was observed, confirming that morphological changes of apoptosis can be dissociated from DNA laddering. Inhibitors of protein or RNA synthesis abolished cell death, and the protective effect of cycloheximide was similar when the drug was applied 2 h before or 8 h after glutamate. These experiments suggest the participation of active gene transcription in the mechanism of death. We thus analyzed the modulation of transcription factors in dying cells using electrophoretic mobility shift assays. The level of factors binding to the 12-O-tetradecanoylphorbol 13-acetate-responsive element (TRE) displayed a late and sustained increase preceding neuronal death, which was not found for factors complexing the Sp1 P, Oct, and USF binding sites. These results raise the possibility that apoptosis is one of the mechanisms of death in the pathologies linked to excitotoxicity and that activation of TRE-binding factors could play a role in these processes." @default.
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- W2014080232 date "2002-11-23" @default.
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- W2014080232 title "Induction of Neuronal Apoptosis by Excitotoxins Associated with Long-Lasting Increase of 12-O-Tetradecanoylphorbol 13-Acetate-Responsive Element-Binding Activity" @default.
- W2014080232 doi "https://doi.org/10.1046/j.1471-4159.1995.65031027.x" @default.
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