The cytotoxicity of hydrogen peroxide (H2O2) toward Chinese hamster V79 cells was assessed with a colony-formation assay. Decylubiquinone, a coenzyme Q homolog, suppressed H2O2-induced cytotoxicity. Almost all the incorporated decylubiquinone was detected as decylubiquinol after incubating the cells for 4h. These results suggest that decylubiquinol reduced in the cells acted as an antioxidant against H2O2-induced oxidative cell injury.
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Nakayama et al. (1994) studied this question.
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