Effects of pomegranate juice on human cytochrome p450 3A (CYP3A) and carbamazepine pharmacokinetics in rats.

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Hidaka M, Okumura M, Fujita K, Ogikubo T, Yamasaki K, Iwakiri T, Setoguchi N, Arimori K

Effects of pomegranate juice on human cytochrome p450 3A (CYP3A) and carbamazepine pharmacokinetics in rats.

Drug Metab Dispos. 2005 May;33(5):644-8. doi: 10.1124/dmd.104.002824. Epub 2005 Jan 26.

PubMed ID

15673597 [ View in PubMed

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Abstract

In this study, we investigated whether components of pomegranate could inhibit CYP3A-mediated drug metabolism. The ability of pomegranate to inhibit the carbamazepine 10,11-epoxidase activity of CYP3A was examined using human liver microsomes, and pomegranate juice was shown to be a potent inhibitor of human CYP3A. Addition of 25 microl (5.0% v/v) of pomegranate juice resulted in almost complete inhibition of the carbamazepine 10,11-epoxidase activity of human CYP3A (1.8%). The inhibition potency of pomegranate juice was similar to that of grapefruit juice. In addition, we investigated the in vivo interaction between pomegranate juice and carbamazepine pharmacokinetics using rats. In comparison with water, the area under the concentration-time curve (AUC) of carbamazepine was approximately 1.5-fold higher when pomegranate juice (2 ml) was orally injected 1 h before the oral administration of the carbamazepine (50 mg/kg). On the other hand, the elimination half-life of carbamazepine and the AUC ratio of carbamazepine 10,11-epoxide to carbamazepine were not altered by the injection of pomegranate juice. These data suggest that pomegranate juice component(s) impairs the function of enteric but not hepatic CYP3A. Thus, we discovered that a component(s) of pomegranate inhibits the human CYP3A-mediated metabolism of carbamazepine. Furthermore, pomegranate juice alters the carbamazepine pharmacokinetics in rats.

DrugBank Data that Cites this Article

Drug Enzymes

Drug	Enzyme	Kind	Organism	Pharmacological Action	Actions
Carbamazepine	Cytochrome P450 3A5	Protein	Humans	Unknown	Substrate Inducer	Details