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- W2011306562 abstract "Nicotinamide adenine dinucleotide (NADH) imaging can be used to monitor neuronal activation and ascertain mitochondrial dysfunction, for example during hypoxia. During neuronal stimulation in vitro, NADH normally becomes more oxidized, indicating enhanced oxygen utilization. A subsequent NADH overshoot during activation or on recovery remains controversial and reflects either increased metabolic activity or limited oxygen availability. Tissue P(2) measurements, obtained simultaneously with NADH imaging in area CA1 in hippocampal slices, reveal that during prolonged train stimulation (ST) in 95% O(2), a persistent NADH oxidation is coupled with increased metabolic demand and oxygen utilization, for the duration of the stimulation. However, under conditions of either decreased oxygen supply (ST-50% O(2)) or enhanced metabolic demand (K(+)-induced spreading depression (K(+)-SD) 95% O(2)) the NADH oxidation is brief and the redox balance shifts early toward reduction, leading to a prolonged NADH overshoot. Yet, oxygen utilization remains elevated and is correlated with metabolic demand. Under these conditions, it appears that the rate of NAD(+) reduction may transiently exceed oxidation, to maintain an adequate oxygen flux and ATP production. In contrast, during SD in 50% O(2), the oxygen levels dropped to a point at which oxidative metabolism in the electron transport chain is limited and the rate of utilization declined." @default.
- W2011306562 created "2016-06-24" @default.
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- W2011306562 date "2010-08-25" @default.
- W2011306562 modified "2023-09-25" @default.
- W2011306562 title "Simultaneous Monitoring of Tissue Po<sub>2</sub> and NADH Fluorescence During Synaptic Stimulation and Spreading Depression Reveals a Transient Dissociation between Oxygen Utilization and Mitochondrial Redox State in Rat Hippocampal Slices" @default.
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- W2011306562 doi "https://doi.org/10.1038/jcbfm.2010.136" @default.
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