Title : Cytochrome P450 3A-dependent metabolism of a potent and selective gamma-aminobutyric acid Aalpha2/3 receptor agonist in vitro: involvement of cytochrome P450 3A5 displaying biphasic kinetics.

Pub. Date : 2007 Aug

PMID : 17460031






3 Functional Relationships(s)
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1 Both t-butyl hydroxylation and N-deethylation reactions were greatly inhibited (>85%) in the presence of CYP3A-selective inhibitory antibodies and chemical inhibitors, indicating that members of the CYP3A subfamily play an important role in TPA023 metabolism. Nitrogen cytochrome P450 family 3 subfamily A member 4 Homo sapiens
2 Both t-butyl hydroxylation and N-deethylation reactions were greatly inhibited (>85%) in the presence of CYP3A-selective inhibitory antibodies and chemical inhibitors, indicating that members of the CYP3A subfamily play an important role in TPA023 metabolism. Nitrogen cytochrome P450 family 3 subfamily A member 4 Homo sapiens
3 Preincubation of liver microsomes with mifepristone (selectivity for CYP3A4 > CYP3A5) greatly inhibited both t-butyl hydroxylation and N-deethylation (>75%); however, the residual activities were significantly higher in the pooled CYP3A5-rich liver microsomes (p < 0.0005). Nitrogen cytochrome P450 family 3 subfamily A member 4 Homo sapiens