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Phytotherapy Research 2010-Aug

Inhibitory effects of curcumenol on human liver cytochrome P450 enzymes.

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Dong-Xue Sun
Zhong-Ze Fang
Yan-Yan Zhang
Yun-Feng Cao
Ling Yang
Jun Yin

キーワード

概要

Curcumenol, one of the major components of Zedoary turmeric oil, has been widely used to treat cancer and inflammation. As an antibiotic or anticancer drug, curcumenol is highly likely to be used in combination with various synthetic drugs in most cases, thus it is necessary to evaluate potential pharmacokinetic drug-drug interactions induced by curcumenol. In this study, the inhibitory effects of curcumenol on seven CYP isoforms were investigated, and the results demonstrated that only CYP3A4 was strongly inhibited (IC(50) = 12.6 +/- 1.3 microM). Kinetic analysis showed the inhibition type was competitive with K(i) value of 10.8 microM. Time- and NADPH-dependent inhibitions were also investigated to show curcumenol is not a mechanism-based inhibitor. Employing these in vitro data and maximum plasma concentration of curcumenol in human predicted from beagle dog's in vivo pharmacokinetic data, the change in AUC of victim drugs was predicted to be 0.4%, which suggested that curcumenol may be safely used without inducing metabolic drug-drug interaction through P450 inhibition. Nevertheless, due to the limited pharmacokinetic data available for curcumenol in humans, it is still not possible to evaluate its potential clinical effects on human patients from in vitro data. Thus, the magnitude of drug-drug interaction (DDI) induced by curcumenol warrants further investigation.

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