Effect of BaoYuan Ⅱ on expression of Smad in Kidney of diabetic rat / 中华中医药杂志

ABSTRACT

Objective: To observe the expression of Smad in diabetic rat’s kidney and the effect of BaoYuan II to it.Methods: SD rats were randomly divided into four groups control group,model group,Benazepril-treatment group and BaoYuan II-treatment group.The latter three groups were induced to be diabetic nephropathy by intraperitoneal injection with streptozotocin and then the drugs were treated respectively.After eight weeks,the plasma albumin,blood glucose,urinary protein,urinary?2-M were determined and expression of mRNA of TGF-?1,Smad2,Smad3,Smad7 was detected by RT-PCR.Results: Compared with diabetic rats group,the level of plasma albumin was increased and the level of blood glucose,urinary protein,urinary?2-M was depressed in BaoYuan II-treatment group.The expression of TGF-?1 and Smad2,Smad3 were down-regulated and Smad7 was up-regulated in model group.The effects of BaoYuan II were similar to Benazepril.Conclusion: BaoYuan II had protected effect to diabetic nephropathy rats.It acted by regulating TGF-?1 and Smad2,Smad3,Smad7 possibly.