Different contribution of CYP2C19 in the in vitro metabolism of three proton pump inhibitors.

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Kita T, Sakaeda T, Baba T, Aoyama N, Kakumoto M, Kurimoto Y, Kawahara Y, Okamura N, Kirita S, Kasuga M, Okumura K

Different contribution of CYP2C19 in the in vitro metabolism of three proton pump inhibitors.

Biol Pharm Bull. 2003 Mar;26(3):386-90.

PubMed ID

12612455 [ View in PubMed

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Abstract

A series of clinical studies on the cytochrome P450 2C19 (CYP2C19) genotype and the pharmacokinetics and pharmacodynamics of three proton pump inhibitors (PPIs), omeprazole, lansoprazole and rabeprazole, have been conducted to establish the individualized pharmacotherapy based on the CYP2C19 genotyping, and in the present study, the CYP2C19 genotype-dependency was more pronounced for omeprazole than the other two. Herein, to validate further the difference among 3 PPIs in CYP2C19 genotype-dependency on the phenotype, a comparative in vitro study was conducted using the human liver microsomes and newly developed anti-human CYP antibodies. The residual concentrations of omeprazole and lansoprazole in 5 lots of human liver microsomes were dependent on the CYP2C19 activities, however, for rabeprazole, there was no correlation. The hydroxylation of omeprazole was more inhibited by anti-CYP2C19 antibody than lansoprazole, whereas anti-CYP3A4 antibody showed similar inhibition. In conclusion, the relative contribution of CYP2C19 on total metabolism of 3 PPIs elucidated herein coincided with the CYP2C19 genotype-dependent pharmacokinetics.

DrugBank Data that Cites this Article

Drug Enzymes

Drug	Enzyme	Kind	Organism	Pharmacological Action	Actions
Lansoprazole	Cytochrome P450 2C19	Protein	Humans	Unknown	Substrate Inhibitor	Details