Effect of Shenfu injection on CYP450s of rat liver

The paper is to report the study of the effect of Shenfu injection on the enzyme activity of liver CYP450 and its mRNA level of rat liver.  Microsome of rat liver was prepared after intravenous administration  of Shenfu injection for 7 days.  The enzyme activity was quantified by Cocktail method.  Meanwhile, the mRNA expression of CYP1A2, CYP2B1/2, CYP2C11 and CYP3A1 in the liver was detected by RT-PCR.  Shenfu injection obviously induced the enzyme activities of CYP2B and CYP2C.  Meantime Shenfu injection decreased the enzyme activities of CYP1A2 and CYP3A.  The mRNA levels of CYP2B and CYP2C were also induced in rats treated with Shenfu injection.  But it obviously inhibited the mRNA level of CYP1A2 and CYP3A.  Since the enzyme activity and mRNA level were obviously changed after administration, the potential effect of drug-drug interaction should be concerned.