Antioxidants inhibit the rat liver microsomal mixed-function-oxidase-catalysed hydroxylation of benzo[a]pyrene. These antioxidants also decrease the formation of mutagenic products from benzo[a]pyrene as judged by the Ames bacterial-mutagenicity assay [B.N. Ames, J. McCann & E. Yamazaki (1975) Mutat. Res. 31, 347-364]. It is suggested that antioxidants exert their protective effect against cancer by inhibiting the formation of carcinogenic metabolites.
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Rahimtula et al. (1977) studied this question.
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