Title : In vitro-in vivo extrapolation of CYP2D6 inactivation by paroxetine: prediction of nonstationary pharmacokinetics and drug interaction magnitude.

Pub. Date : 2005 Jun

PMID : 15788540






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1 In vitro-in vivo extrapolation of CYP2D6 inactivation by paroxetine: prediction of nonstationary pharmacokinetics and drug interaction magnitude. Paroxetine cytochrome P450, family 2, subfamily d, polypeptide 3 Rattus norvegicus
2 Recent data have provided evidence for mechanism-based inactivation of CYP2D6 by paroxetine. Paroxetine cytochrome P450, family 2, subfamily d, polypeptide 3 Rattus norvegicus
3 We have predicted the pharmacokinetic consequences of CYP2D6 inactivation by paroxetine from in vitro inactivation kinetics (kinact 0.17 min(-1), unbound KI 0.315 microM), in vivo inhibitor concentrations, and an estimated CYP2D6 degradation half-life of 51 h, using a mathematical model of mechanism-based inhibition. Paroxetine cytochrome P450, family 2, subfamily d, polypeptide 3 Rattus norvegicus
4 We have predicted the pharmacokinetic consequences of CYP2D6 inactivation by paroxetine from in vitro inactivation kinetics (kinact 0.17 min(-1), unbound KI 0.315 microM), in vivo inhibitor concentrations, and an estimated CYP2D6 degradation half-life of 51 h, using a mathematical model of mechanism-based inhibition. Paroxetine cytochrome P450, family 2, subfamily d, polypeptide 3 Rattus norvegicus
5 In summary, the scaling model for mechanism-based inactivation successfully predicted the pharmacokinetic consequences of CYP2D6 inactivation by paroxetine from in vitro data. Paroxetine cytochrome P450, family 2, subfamily d, polypeptide 3 Rattus norvegicus