Title : Methadone metabolism by human placenta.

Pub. Date : 2004 Aug 1

PMID : 15242824






4 Functional Relationships(s)
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1 Aminoglutethimide and 4-hydroxyandrostenedione inhibited EDDP formation by 88 and 70%, respectively, suggesting that CYP19/aromatase is the enzyme catalyzing the reaction. 2-ethylidene-1,5-dimethyl-3,3-diphenylpyrrolidine cytochrome P450 family 19 subfamily A member 1 Homo sapiens
2 The apparent K(m) and V(max) values for the CYP19 catalyzed metabolism of methadone to EDDP were 424 +/- 92 microM and 420 +/- 89 pmol(mgprotein)(-1)min(-1), respectively. 2-ethylidene-1,5-dimethyl-3,3-diphenylpyrrolidine cytochrome P450 family 19 subfamily A member 1 Homo sapiens
3 Kinetic analysis of a cDNA-expressed CYP19 for the metabolism of methadone to EDDP was identical to that by placental microsomes. 2-ethylidene-1,5-dimethyl-3,3-diphenylpyrrolidine cytochrome P450 family 19 subfamily A member 1 Homo sapiens
4 Taken together, these data indicate that CYP19/aromatase is the major enzyme responsible for the metabolism of methadone to EDDP in term human placentas obtained from healthy pregnancies. 2-ethylidene-1,5-dimethyl-3,3-diphenylpyrrolidine cytochrome P450 family 19 subfamily A member 1 Homo sapiens