Title : Effects of cytochrome P450 3A (CYP3A) and the drug transporters P-glycoprotein (MDR1/ABCB1) and MRP2 (ABCC2) on the pharmacokinetics of lopinavir.

Pub. Date : 2010 Jul

PMID : 20590614






10 Functional Relationships(s)
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1 Effects of cytochrome P450 3A (CYP3A) and the drug transporters P-glycoprotein (MDR1/ABCB1) and MRP2 (ABCC2) on the pharmacokinetics of lopinavir. Lopinavir cytochrome P450, family 3, subfamily a, polypeptide 11 Mus musculus
2 Effects of cytochrome P450 3A (CYP3A) and the drug transporters P-glycoprotein (MDR1/ABCB1) and MRP2 (ABCC2) on the pharmacokinetics of lopinavir. Lopinavir cytochrome P450, family 3, subfamily a, polypeptide 11 Mus musculus
3 BACKGROUND AND PURPOSE: Lopinavir is extensively metabolized by cytochrome P450 3A (CYP3A) and is considered to be a substrate for the drug transporters ABCB1 (P-glycoprotein) and ABCC2 (MRP2). Lopinavir cytochrome P450, family 3, subfamily a, polypeptide 11 Mus musculus
4 BACKGROUND AND PURPOSE: Lopinavir is extensively metabolized by cytochrome P450 3A (CYP3A) and is considered to be a substrate for the drug transporters ABCB1 (P-glycoprotein) and ABCC2 (MRP2). Lopinavir cytochrome P450, family 3, subfamily a, polypeptide 11 Mus musculus
5 Here, we have assessed the individual and combined effects of CYP3A, ABCB1 and ABCC2 on the pharmacokinetics of lopinavir and the relative importance of intestinal and hepatic metabolism. Lopinavir cytochrome P450, family 3, subfamily a, polypeptide 11 Mus musculus
6 Increased lopinavir AUC(oral) (>2000-fold) was observed in cytochrome P450 3A knockout (Cyp3a(-/-)) mice compared with wild-type mice. Lopinavir cytochrome P450, family 3, subfamily a, polypeptide 11 Mus musculus
7 Increased lopinavir AUC(oral) (>2000-fold) was observed in cytochrome P450 3A knockout (Cyp3a(-/-)) mice compared with wild-type mice. Lopinavir cytochrome P450, family 3, subfamily a, polypeptide 11 Mus musculus
8 CONCLUSIONS AND IMPLICATIONS: CYP3A was the major determinant of lopinavir pharmacokinetics, far more than Abcb1a/b. Lopinavir cytochrome P450, family 3, subfamily a, polypeptide 11 Mus musculus
9 Both intestinal and hepatic CYP3A activity contributed importantly to low oral bioavailability of lopinavir. Lopinavir cytochrome P450, family 3, subfamily a, polypeptide 11 Mus musculus
10 Ritonavir increased lopinavir bioavailability primarily by inhibiting CYP3A. Lopinavir cytochrome P450, family 3, subfamily a, polypeptide 11 Mus musculus