Lidocaine effects on brain mitochondrial metabolism in vitro

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Abstract

Both lidocaine and anoxia inhibit rapid axonal transport. In an attempt to elucidate the mechanism of this action of lidocaine, its effect on mitochondrial respiration was studied. The local anesthetic produces a dose dependent inhibition of oxygen consumption (50% inhibition at 8mM) by porcine brain mitochondria when glutamate, but not when succinate, serves as the substrate. This indicates electron transport is blocked at the NADH dehydrogenase level. Potent uncoupling of oxidative phosphorylation is observed with both substrates. All of the effects are readily reversible upon removal of the anesthetic. It is concluded that lidocaine apparently inhibits rapid axonal transport by depressing oxidative metabolism.

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Haschke, R. H., & Fink, B. R. (1975). Lidocaine effects on brain mitochondrial metabolism in vitro. Anesthesiology, 42(6), 737–740. https://doi.org/10.1097/00000542-197506000-00018

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