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- W2000634566 abstract "Brain mitochondrial ATP-sensitive K+ channel (mitoK(ATP)) opening by diazoxide protects against ischemic damage and excitotoxic cell death. Here we studied the redox properties of brain mitoK(ATP) . MitoK(ATP) activation during excitotoxicity in cultured cerebellar granule neurons prevented the accumulation of reactive oxygen species (ROS) and cell death. Furthermore, mitoK(ATP) activation in isolated brain mitochondria significantly prevented H2O2 release by these organelles but did not change Ca2+ accumulation capacity. Interestingly, the activity of mitoK(ATP) was highly dependent on redox state. The thiol reductant mercaptopropionylglycine prevented mitoK(ATP) activity, whereas exogenous ROS activated the channel. In addition, the use of mitochondrial substrates that led to higher levels of endogenous mitochondrial ROS release closely correlated with enhanced K+ transport activity through mitoK(ATP). Altogether, our results indicate that brain mitoK(ATP) is a redox-sensitive channel that controls mitochondrial ROS release." @default.
- W2000634566 created "2016-06-24" @default.
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- W2000634566 date "2008-01-01" @default.
- W2000634566 modified "2023-10-16" @default.
- W2000634566 title "Redox properties of the adenoside triphosphate-sensitive K+ channel in brain mitochondria" @default.
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- W2000634566 doi "https://doi.org/10.1002/jnr.21614" @default.
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