四物汤及其配伍对大鼠肝脏P450酶活性及mRNA表达的影响

Effect of Siwu decoction and its combined administration on hepatic P450 enzymatic activity and mRNA expression in rats

研究四物汤复方及其配伍对大鼠肝脏P450酶活性及其mRNA表达水平的影响。大鼠口服灌胃四物汤及其配伍水煎液2周后,处死,用生理盐水灌流肝脏,制备肝微粒体,采用混合探针与肝微粒体体外孵育法考察四物汤对大鼠肝脏细胞色素P450酶的影响。利用实时定量聚合酶链式反应(Q-PCR)检测四物汤对大鼠肝脏细胞色素P450 mRNA表达的影响。四物汤复方组CYP1A2酶活性与对照组相比升高(P<0.05),熟地白芍、当归白芍、当归川芎以及白芍川芎组的CYP1A2和CYP2C19的酶活性与对照组相比降低(P<0.05),复方组、单药组、2味药配伍组的CYP2B6的酶活性与对照组相比降低(P<0.05)。复方组对CYP1A2的mRNA表达具有上调作用(P<0.05),4味单药对CYP2B1 mRNA表达具有下调作用的(P<0.05)。四物汤复方对大鼠肝脏CYP1A2的酶活性具有诱导作用,熟地和当归组与对照组相比酶活性相当,但与白芍合用后显著下调了CYP1A2的酶活性。复方及其配伍对CYP2B6的酶活性具有抑制作用,其中当归对酶活性下调作用较强。复方对CYP1A2以及4味单药对CYP2B1的mRNA表达的影响与酶活性水平相平行。

To study the effect of Siwu decoction （SWD） compound and its combined administration on hepatic P450 enzymatic activity and mRNA expression in rats. Rats were orally administered with SWD and water decoction combined with other medicines for two weeks, and then sacrificed. Their livers were perfused with normal saline to prepare liver micrisomes. Mixed probe and liver microsome in vitro incubation method were adopted to detect the effect of SWD on hepatic cytochrome P450. The real-time quantitative polymerase chain reaction （Q-PCR） was used to detect the effect of SWD on the expression of hepatic cytochrome P450. Compared with the control group, the SWD compound group showed higher CYP1A2 enzymatic activity （P〈0.05）; Rehmanniae-paeoniae, angelicae-paeoniae, angelicae-rhizome, paeoniae-rhizome groups had lower CYP1A2 and CYP2C19 enzymatic activities （P〈0.05）; And the compound group, the single component group and the combination group showed lower CYP2B6 enzymatic activities （P〈0.05）. The compound could up-regulated the mRNA expression of CYP2B1 （P〈0.05）; And the four single components could down-regulated the mRNA expression of CYP2B1 （P〈0.05）. SWD compound had the effect in inducing CYP1A2 enzymatic activity. The rehmanniae-paeoniae group and the angelicae-paeoniae group had identical enzymatic activity with the control group, but significant down-regulation in CYP1A2 enzymatic activity after being combined with paeoniae. The compound and its combined administration showed the inhibitory effect on CYP2B6 enzymatic activity, particularly being combined with angelicae. The compound showed identical effect with the four single components in terms of CYP1A2 mRNA expression and enzymatic activity.keywords：Siwu decoction