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- W2038006975 abstract "It is well known that vitamin E (α-tocopherol, α-toc) is a very efficient lipid soluble antioxidant and several studies showed its beneficial action in the prevention and reduction of atherosclerosis. However, some in vitro studies suggest a prooxidant role of vitamin E, which could occur under given circumstances. This study was thus designed to investigate the antioxidant vs. prooxidant effect of vitamin E with regards to LDL peroxidation induced under different oxidative stress conditions. LDL was enriched with α-tocopherol and different α-toc/LDL ratios were studied (8.0±2.5, 14.3±3.0, 33.3±3.7, 42.7±3.5 and 48.2±4.5 molecules of α-toc/LDL particle). Enriched and control LDL were oxidized by action of OH and O2− free radicals produced by γ-radiolysis at different dose rates. Susceptibility of LDL to oxidation was examined by the measure of conjugated diene and TBARS formation as well as LDL endogenous α-toc disappearance. Increasing LDL α-toc concentration reduced the LDL susceptibility to oxidation and their oxidizability. α-toc disappearance rates were comprised between 43 and 8.3×10−10 M s−1 and decreased with the radiation dose rate. Our results support an antioxidant role for α-tocopherol at high and low oxidative stress conditions." @default.
- W2038006975 created "2016-06-24" @default.
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- W2038006975 date "2005-02-01" @default.
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- W2038006975 title "Study of the antioxidant effect of α-tocopherol on low-density lipoprotein peroxidation induced at low and high γ-radiation dose rates" @default.
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- W2038006975 doi "https://doi.org/10.1016/j.radphyschem.2003.11.011" @default.
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