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- W2101857650 abstract "We have previously shown that bisphenol A (BPA) is oxidized to bisphenol-o-quinone in the presence of activation system and that the chemical reaction of DNA or deoxyguanosine 3′-monophosphate (dGMP) with bisphenol-o-quinone produces adducts. In the present study, using the 32P-postlabeling technique, we have investigated the in vivo DNA adduct formation by BPA by examining covalent modification in DNA. Administration of a single or multiple dose of 200 mg/kg of BPA to CD1 male rats produced two major and several minor adducts in liver DNA. The two major in vivo adducts matched the adduct profile of DNA or dGMP-bis-phenol-o-quinone. To determine how BPA may be converted to DNA-binding metabolites, adducts were examined after incubation of DNA with BPA in the presence of a microsomal activation system. The in vitro incubation of BPA with DNA in the presence of a microsomal activation system revealed one major adduct and several minor adducts. The formation of adducts in DNA by BPA in the presence of a microsomal activation system was drastically decreased by known inhibitors of cytochrome P450. Adduct formation in DNA when cumene hydroperoxide or NADPH was used as a cofactor showed adducts with similar chromatographic mobilities as those from the reaction of dGMP-bisphenol-o-quinone. These data demonstrate that BPA is capable of binding covalently to DNA. DNA binding can be inhibited by the inhibitors of cytochrome P450. One of the DNA-binding metabolite(s) both in vitro and in vivo may be bisphenol-o-quinone. Covalent modifications in DNA by in vivo exposure of BPA may be a factor in the induction of hepatotoxicity. © 1995 Wiley-Liss, Inc." @default.
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- W2101857650 date "1995-01-01" @default.
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- W2101857650 title "In vivo DNA adduct formation by bisphenol A" @default.
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- W2101857650 doi "https://doi.org/10.1002/em.2850260109" @default.
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