Drug metabolism by the fetal stump-tailed monkey (Macaca arctoides). Hepatic microsomal N-demethylation and glucuronidation as measured by radiometric assays.

Abstract:

:Sensitive radiometric assays were adapted to study the development and kinetics of meperidine and methadone N-demethylation and morphine glucuronidation by microsomes isolated from livers of fetal stump-tailed macaques (Macaca arctoides). Times in development selected for study were midterm, three-quarter term, near term and newborn (0.5 h and 14 days). With appropriate attention to keeping blanks low, hepatic drug metabolism was demonstrable as early as midterm. Vmax for the N-demethylation reactions (nmole product/10 min/mg microsomal protein) increased throughout gestation, whereas the apparent Kms remained constant. With respect to morphine glucuronidation, all kinetic parameters remained constant throughout the last half of gestation.

journal_name

Pharmacology

journal_title

Pharmacology

authors

Dvorchik BH,Stenger VG,Hartman RD

doi

10.1159/000137259

subject

Has Abstract

pub_date

1979-01-01 00:00:00

pages

241-50

issue

5

eissn

0031-7012

issn

1423-0313

journal_volume

18

pub_type

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