Abstract
It is well documented that the metabolism of ethanol occurs through a series of pyridine nucleotide-linked enzymatic reactions resulting in the production of acetaldehyde and acetate. The factors regulating hepatic acetaldehyde oxidation are of critical importance, since ethanol-derived acetaldehyde has been implicated in hepatic lipid peroxidation. Isolated hepatocytes incubated in high concentrations of acetaldehyde exhibit significant increases in lipid peroxidation as measured by malondialdehyde formation (Stege, 1982); and the infusion of acetaldehyde to perfused rat liver also stimulates lipid peroxidation as measured by an increased formation of ethane (Muller and Sies, 1983). Recently an alternative pathway of ethanol metabolism has been identified which may also contribute to initiation of hepatic lipid peroxidation (Reinke, et al., 1991; and Knecht et al. 1990). Occurring independent of the pyridine nucleotide-linked dehydrogenase enzymes, this enzymatic pathway involves a P-450 mediated, one electron oxidation of ethanol resulting in the production of an ethanol-derived free radical which could serve as an initiator of lipid peroxidation.
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Hartley, D.P., Petersen, D.R. (1993). Metabolic Interactions of 4-Hydroxynonenal, Acetaldehyde and Glutathione in Isolated Liver Mitochondria. In: Weiner, H., Crabb, D.W., Flynn, T.G. (eds) Enzymology and Molecular Biology of Carbonyl Metabolism 4. Advances in Experimental Medicine and Biology, vol 328. Springer, Boston, MA. https://doi.org/10.1007/978-1-4615-2904-0_4
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DOI: https://doi.org/10.1007/978-1-4615-2904-0_4
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