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- W3121033746 abstract "Cytochrome P450 3A4 is a highly polymorphic enzyme and metabolizes approximately 40%–60% of therapeutic drugs. Its genetic polymorphism may significantly affect the expression and function of CYP3A4 resulting in alterations of the pharmacokinetics and pharmacodynamics of the CYP3A4-mediated drugs. The purpose of this study was to evaluate the catalytic activities of 30 CYP3A4 nonsynonymous variants and wild type toward oxycodone in vitro. CYP3A4 proteins were incubated with oxycodone for 30 min at 37 °C and the reaction was terminated by cooling to −80 °C immediately. Ultraperformance liquid chromatography tandem mass-spectrometry was used to analyze noroxycodone, and kinetic parameters Km, Vmax, and intrinsic clearance (Vmax/Km) of noroxycodone were also determined. Compared with CYP3A4.1, 24 CYP3A4 variants (CYP3A4.2–.5, -.7–.16, -.18 and -.19, -.23 and -.24, -.28 and -.29, and -.31–.34) exhibited significantly decreased relative clearance values (from 4.82% ± 0.31% to 80.98% ± 5.08%), whereas CYP3A4.6, -.17, -.20, -.21, -.26, and -.30 displayed no detectable enzyme activity. As the first study of these alleles for oxycodone metabolism in vitro, results of this study may provide insight into establishing the genotype-phenotype relationship for oxycodone and serve as a reference for clinical administrators and advance the provision of personalized precision medicine." @default.
- W3121033746 created "2021-01-18" @default.
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- W3121033746 date "2021-01-04" @default.
- W3121033746 modified "2023-10-14" @default.
- W3121033746 title "Evaluation of Recombinant CYP3A4 Variants on the Metabolism of Oxycodone In Vitro" @default.
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- W3121033746 doi "https://doi.org/10.1021/acs.chemrestox.0c00361" @default.
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