Title : Suppression of male-specific cytochrome P450 isoforms by bisphenol A in rat liver.

Pub. Date : 1998 Jun

PMID : 9708877






6 Functional Relationships(s)
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1 Among the P450-dependent monooxygenase activities, testosterone 2alpha-hydroxylase (T2AH) and testosterone 6beta-hydroxylase (T6BH) activities, which are associated with CYP2C11 and CYP3A2 respectively, were remarkably decreased by 40 mg/kg BPA. bisphenol A cytochrome P450, family 3, subfamily a, polypeptide 2 Rattus norvegicus
2 Among the P450-dependent monooxygenase activities, testosterone 2alpha-hydroxylase (T2AH) and testosterone 6beta-hydroxylase (T6BH) activities, which are associated with CYP2C11 and CYP3A2 respectively, were remarkably decreased by 40 mg/kg BPA. bisphenol A cytochrome P450, family 3, subfamily a, polypeptide 2 Rattus norvegicus
3 Among the P450-dependent monooxygenase activities, testosterone 2alpha-hydroxylase (T2AH) and testosterone 6beta-hydroxylase (T6BH) activities, which are associated with CYP2C11 and CYP3A2 respectively, were remarkably decreased by 40 mg/kg BPA. bisphenol A cytochrome P450, family 3, subfamily a, polypeptide 2 Rattus norvegicus
4 Furthermore, immunoblotting showed that BPA (20 or 40 mg/kg) significantly reduced CYP2C 11/6 and CYP3A2/1 protein levels in rat liver microsomes. bisphenol A cytochrome P450, family 3, subfamily a, polypeptide 2 Rattus norvegicus
5 The Km values for T2AH and T6BH in 20 and 40 mg/kg BPA-treated rats were significantly high compared with that in control rats. bisphenol A cytochrome P450, family 3, subfamily a, polypeptide 2 Rattus norvegicus
6 The Vmax for T2AH was dose-dependently decreased by BPA treatment, whereas that of T6BH was only decreased by BPA at 40 mg/kg. bisphenol A cytochrome P450, family 3, subfamily a, polypeptide 2 Rattus norvegicus