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• W2056565986 abstract "Neuronal apoptosis induced by staurosporine (STS) involves multiple cellular and molecular events, such as the production of reactive oxygen species (ROS). In this study, we tested the efficacy of two synthetic superoxide dismutase/catalase mimetics (EUK-134 and EUK-189) on neuronal apoptosis, oxidative stress, and mitochondrial dysfunction produced by STS in primary cortical neuronal cultures. Exposure of cultures to STS for 24 h increased lactate dehydrogenase (LDH) release, the number of apoptotic cells, and decreased trypan blue exclusion. Pretreatment with 20 μM EUK-134 or 0.5 μM EUK-189 significantly attenuated STS-induced neurotoxicity, as did pretreatment with the caspase-1 inhibitor, Ac-YVAD-CHO, but not the caspase-3 inhibitor, Ac-DEVD-CHO. Posttreatment (1–3 h following STS exposure) with 20 μM EUK-134 or 0.5 μM EUK-189 significantly reduced STS-induced LDH release, in a time-dependent manner. Exposure of cultures to STS for 1 h produced an elevation of ROS, as determined by increased levels of 2,7-dichlorofluorescein (DCF). This rapid elevation of ROS was followed by an increase in lipid peroxidation, and both the increase in DCF fluorescence and in lipid peroxidation were significantly blocked by pretreatment with EUK-134. STS treatment for 3–6 h increased cytochrome c release from mitochondria into the cytosol, an effect also blocked by pretreatment with EUK-134. These results indicate that intracellular oxidative stress and mitochondrial dysfunction are critically involved in STS-induced neurotoxicity. However, there are additional cellular responses to STS, which are insensitive to treatment with radical scavengers that also contribute to its neurotoxicity." @default.
• W2056565986 created "2016-06-24" @default.
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• W2056565986 date "2001-09-01" @default.
• W2056565986 modified "2023-10-10" @default.
• W2056565986 title "Attenuation of Staurosporine-Induced Apoptosis, Oxidative Stress, and Mitochondrial Dysfunction by Synthetic Superoxide Dismutase and Catalase Mimetics, in Cultured Cortical Neurons" @default.
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• W2056565986 doi "https://doi.org/10.1006/exnr.2001.7747" @default.
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