Differential inductive profiles of hepatic cytochrome P450s by the extracts of Sophora flavescens in male and female C57BL/6JNarl mice.

Abstract:

AIM OF THE STUDY:Sophora flavescens has been used as an antipyretic and analgesic agent. To assess the possible herb-drug interaction, effects of S. flavescens extracts on hepatic cytochrome P450 (P450, CYP) enzymes were studied. MATERIALS AND METHODS:Effects of the extracts prepared by three different pharmaceutical companies on P450 enzymes were investigated in male and female C57BL/6JNarl mice. RESULTS:In male mice, extract 1 caused a dose- and time-dependent increase of 7-ethoxyresorufin O-deethylation (EROD) activity. Three-day treatment with 3g/kg extracts 1-3 elevated EROD, 7-pentoxyresorufin O-dealkylation (PROD), coumarin hydroxylation, and nifedipine oxidation (NFO) activities. In female mice, extracts 1 and 2 increased EROD and PROD activities without affecting coumarin hydroxylation and NFO activities. However, extract 3, which lacked prenylated flavonoids, caused an induction profile in females the same as in males. Treatment with extract 3 fortified with prenylated flavonoids restored the gender difference. An alkaloid, oxymatrine was present in all extracts and increased EROD and PROD activities. At a human equivalent dose (0.18 g/(kg day)), all extracts increased EROD activity. CONCLUSIONS:These results revealed that Cyp1a had a lower induction response threshold. Oxymatrine contributed at least partly to the P450 induction by S. flavescens. At a higher dose, Cyp2a, Cyp2b, and Cyp3a could be induced and the male-specific induction of Cyp2a and Cyp3a was associated with the presence of prenylated flavonoids.

journal_name

J Ethnopharmacol

authors

Ueng YF,Chen CC,Tsai CC,Soucek P

doi

10.1016/j.jep.2009.09.018

subject

Has Abstract

pub_date

2009-12-10 00:00:00

pages

437-46

issue

3

eissn

0378-8741

issn

1872-7573

pii

S0378-8741(09)00578-9

journal_volume

126

pub_type

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