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National Institute of Environmental Health Sciences

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Your Environment. Your Health.

Publication Detail

Title: Antioxidant reactions of alpha-tocopherolhydroquinone.

Authors: Liebler, D C; Burr, J A

Published In Lipids, (2000 Sep)

Abstract: Alpha-tocopherolhydroquinone (TQH2) is a product of alpha-tocopherol oxidation/reduction that exerts antioxidant effects in biological systems. TQH2 inhibited autoxidation of methyl linoleate initiated by peroxyl radicals derived from thermolysis of 2,2'-azobis(2,4-dimethylvaleronitrile) in acetonitrile. TQH2 oxidation yielded alpha-tocopherolquinone (TQ) as a major product and 2,3-epoxy-alpha-tocopherolquinone and 5,6-epoxy-alpha-tocopherolquinone as minor products. Each TQH2 consumed approximately two peroxyl radicals in the course of the oxidation. The data suggest that TQH2 scavenges peroxyl radicals primarily by electron transfer to form TQ and secondarily by addition-elimination to form the epoxyquinones.

PubMed ID: 11026627 Exiting the NIEHS site

MeSH Terms: No MeSH terms associated with this publication

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