Effects of Shenmai injection on the regulation of heart CYP450 isozymes in rats / 中国药理学通报

ABSTRACT

Aim To investigate the influence of Shen-mai injection ( SMI ) on the expression of cytochrome P450(CYP450) system in rat′s hearts. Methods Rat hearts were prepared after a fourteen-day continuous administration of SMI. The expression of several CYP genes, ANP, BNP and EPHX2 were measured by qPCR. Results SMI induced the increase in the ex-pression of other CYP genes except CYP2 B1、CYP4 A3 and CYP4 F6;HSI caused an induction of CYP2 E1 , CYP4A3,CYP4F1 and EHPX2 as compared with the control. In addition, there was a significant induction of ANP, BNP and EHPX2 and a significant inhibition of CYP2B1 and CYP2C11 after treated with MDI. Conclusion Although there is no significant change in the gene expression of CYP2 B1 after the treatment with SMI, but there is a general trend of induction, and MDI shows a significant inhibition of CYP2 B1 , therefore HSI has greater effect on CYP 2 B 1 than MDI . SMI causes a significant induction of CYP2 E1 , CYP4F1 and EHPX2 , similarly there is an induction of CYP2E1,CYP4F1 and EHPX2 by HSI and MDI, indi-cating that Hongshen and Maidong are both involved in the induction. MDI has a greater inductive effect than HSI on ANP and BNP. SMI is widely used for the treatment of cardiovascular diseases due to its regula-tion of CYP2J3、ANP and BNP mRNA expression.