title: Neonatal testosterone imprinting of hepatic microsomal drug metabolism and a male-specific form of cytochrome P-450 in the rat.
abstract: The effects of neonatal castration and treatment with testosterone on sex-specific forms of cytochrome P-450, namely P-450-male and P-450-female, were studied. Neonatal castration of male rats resulted in a change in the population of forms of cytochrome P-450. Castration 1 day after birth abolished the synthesis of P-450-male and stimulated the synthesis of P-450-female. The decrease in the amount of P-450-male as well as the activities of drug metabolizing enzymes was partially reversed by administration of testosterone after castration.
mesh_terms: D015660:7-Alkoxycoumarin O-Dealkylase; D000818:Animals; D000831:Animals, Newborn; D001579:Benzopyrene Hydroxylase / Q000378:metabolism; D002369:Castration; D003577:Cytochrome P-450 Enzyme System / Q000378:metabolism*; D003573:Cytochrome b Group / Q000378:metabolism; D015786:Cytochromes b5; D005260:Female; D008297:Male; D008862:Microsomes, Liver / Q000201:enzymology / Q000378:metabolism*; D010105:Oxygenases / Q000378:metabolism; D004364:Pharmaceutical Preparations / Q000378:metabolism*; D051381:Rats; D011919:Rats, Inbred Strains; D012737:Sex Factors; D013739:Testosterone / Q000494:pharmacology*
chemical_list: D003573:Cytochrome b Group; D004364:Pharmaceutical Preparations; D013739:Testosterone; D015786:Cytochromes b5; D003577:Cytochrome P-450 Enzyme System; D010105:Oxygenases; D015660:7-Alkoxycoumarin O-Dealkylase; D001579:Benzopyrene Hydroxylase