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- W2034156633 abstract "The oxidation of ethanol by the liver produces acetaldehyde, which is a highly reactive compound. Low concentrations of acetaldehyde inhibited mitochondrial respiration with glutamate, β-hydroxybutyrate, or α-ketoglutarate as substrates, but not with succinate or ascorbate. High concentrations led to respiratory inhibition with all substrates. Inhibition of succinate- and ascorbate-linked oxidation by acetaldehyde correlates with the inhibition of the activities of succinic dehydrogenase and cytochrome oxidase. A site more sensitive to acetaldehyde appears to be localized prior to the NADH-ubiquinone oxidoreductase segment of the respiratory chain. Acetaldehyde inhibits energy production by the mitochondria, as evidenced by its inhibition of respiratory control, oxidative phosphorylation, the rate of phosphorylation, and the ATP-32P exchange reaction. Energy utilization is also inhibited, in view of the decrease in both substrate- and ATP-supported Ca2+ uptake, and the reduction in Ca2+-stimulated oxygen uptake and ATPase activity. The malate-aspartate, α-glycerophosphate, and fatty acid shuttles for the transfer of reducing equivalents, and oxidation by mitochondria, were highly sensitive to acetaldehyde. Acetaldehyde also inhibited the uptake of anions which participate in the shuttles. The inhibition of the shuttles is apparently caused by interference with NAD+-dependent state 3 respiration and anion entry and efflux. Ethanol (6–80 mm) had no significant effect on oxygen consumption, anion uptake, or mitochondrial energy production and utilization. The data suggest that acetaldehyde may be implicated in some of the toxic effects caused by chronic ethanol consumption." @default.
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- W2034156633 date "1974-03-01" @default.
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- W2034156633 title "The effect of acetaldehyde on mitochondrial function" @default.
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- W2034156633 doi "https://doi.org/10.1016/0003-9861(74)90231-8" @default.
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