The Effect of Genetic Polymorphism on the Inhibition of Azole Antifungal Agents Against CYP2C9-Mediated Metabolism.

Abstract:

:We investigated the effect of cytochrome P450 (CYP) 2C9 polymorphism on the inhibition of methylhydroxylation activity of tolbutamide, a typical CYP2C9 substrate, by triazole antifungal agents, fluconazole and voriconazole. Although the Michaelis constants (Km), maximal velocities (Vmax), and Vmax/Km values for CYP2C9.1 (wild type) and CYP2C9.2 (Arg144Cys) were similar and CYP2C9.3 (Ile359Leu) had a higher Km and a lower Vmax than CYP2C9.1 and CYP2C9.2, the inhibition constants of fluconazole and voriconazole against CYP2C9.2 were lower than that against CYP2C9.1 and CYP2C9.3. These results suggest that more careful administration of azole antifungals to patients with the CYP2C9*2 allele might be required because of the strong inhibitory effects.

journal_name

J Pharm Sci

authors

Niwa T,Hata T

doi

10.1016/j.xphs.2016.01.007

subject

Has Abstract

pub_date

2016-03-01 00:00:00

pages

1345-8

issue

3

eissn

0022-3549

issn

1520-6017

pii

S0022-3549(16)00270-7

journal_volume

105

pub_type

杂志文章