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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

Effects of administration to mice of butylated hydroxyanisole by oral intubation on benzo[a]pyrene-induced pulmonary adenoma formation and metabolism of benzo[a]pyrene.

Administration of butylated hydroxyanisole (BHA) by oral intubation 4 hours before challenge with benzo[a]pyrene (BP) inhibited the formation of pulmonary adenomas in A/HeJ mice. Incubation of BP with liver microsomes from mice that received BHA 2,4, or 8 hours before being killed resulted in less binding of BP metabolites to added DNA than occurred with control microsomes. High-pressure liquid chromatography studies of the BP metabolite pattern produced by the incubation of BP with liver microsomes from mice given BHA by oral intubation showed a decrease in formation of BP-4,5-oxide and 9-hydroxybenzo[a]pyrene. In contrast, the formation of 3-hydroxybenzo[a]-pyrene was increased. The was increased. The short interval between the administration of BHA by oral intubation and the observed biochemical changes indicated that BHA could exert a direct effect on the microsomal metabolism of BP. These changes in metabolism of BP occurred under conditions of BHA administration that produced a decreased neoplastic response to this carcinogen.[1]


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