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Effects of pregnancy on the cytochrome P-450 system in mice
The effects of pregnancy on the hepatic cytochrome P-450-dependent mixed-function monooxygenase system (P-450) from day 6 to day 18 of gestation were examined in the C57BL/6J mouse. Pregnancy induced an initial increase and then a decrease in total P-450 content, a decrease in microsomal aminopyrine-N-demethylase activity, and had no effect on microsomal ethylmorphine-N-demethylase activity. Pregnancy also induced in the C57BL/6J and the DBA/2J mice a new major isozyme of P-450 (P-450gest) as determined by high performance liquid chromatography and gel electrophoresis.
The effects of pregnancy on the hepatic cytochrome P-450-dependent mixed-function monooxygenase system (P-450) from day 6 to day 18 of gestation were examined in the C57BL/6J mouse. Pregnancy induced an initial increase and then a decrease in total P-450 content, a decrease in microsomal aminopyrine-N-demethylase activity, and had no effect on microsomal ethylmorphine-N-demethylase activity. Pregnancy also induced in the C57BL/6J and the DBA/2J mice a new major isozyme of P-450 (P-450gest) as determined by high performance liquid chromatography and gel electrophoresis.