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• W2014294777 abstract "Several signaling pathways are differentially activated during apoptotic cell death. We have previously found that during apoptotic death of cerebellar granule neurons (CGN) induced by potassium deprivation (K5) and staurosporine there is an increase in the generation of reactive oxygen species (ROS). The inhibition of ROS generation reduces the extent of cell death. However, remain to be elucidated the mechanisms by which ROS participate in this apoptotic process. On the other hand, it is well known that c-Jun amino-terminal kinase (JNK) pathway plays a pivotal role in cell death of several cell types. In the present study we found that K5 activated the JNK pathway and that its inhibition with SP600125 markedly prevented caspase 3 activation, nuclear condensation and cell death induced by K5. In contrast, JNK pathway was not activated by staurosporine and the JNK inhibitor did not affect cell death induced by this stimulus. We also found that JNK inhibition did not affect ROS levels induced by K5 or staurosporine, suggesting that ROS are upstream of JNK pathway activation. Antioxidants increased ASK1 phosphorylation and decreased JNK1/2 and c-Jun phosphorylation induced by K5. According to these results, we suggest that apoptosis induced by K5 is JNK-dependent and mediated by ROS, but apoptosis induced by staurosporine is not dependent on JNK and that the observed ROS generation by staurosporine seems not to be involved in the activation of this signaling pathway." @default.
• W2014294777 created "2016-06-24" @default.
• W2014294777 creator A5048475501 @default.
• W2014294777 creator A5067088735 @default.
• W2014294777 date "2009-12-01" @default.
• W2014294777 modified "2023-09-25" @default.
• W2014294777 title "Role of oxidative stress and JNK pathway in apoptotic death induced by potassium deprivation and staurosporine in cerebellar granule neurons" @default.
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• W2014294777 doi "https://doi.org/10.1016/j.neuint.2009.05.015" @default.
• W2014294777 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/19486916" @default.
• W2014294777 hasPublicationYear "2009" @default.
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