【摘要】 目的:观察Smad在糖尿病大鼠肾脏中的表达及保元Ⅱ号对其表达的影响。方法:用链脲佐菌素腹腔注射制备糖尿病大鼠模型,随机分为空白对照组(N),模型组(DN),保元Ⅱ号治疗组(Z)和贝那普利治疗组(B),并用相应的药物干预,给药8周后处死大鼠,检测各组血浆白蛋白、血糖、尿蛋白定量、尿β2微球蛋白含量,并且用RT-PCR检测TGF-β1和Smad2,Smad3,Smad7在肾组织的表达水平。结果:与DN组相比,DN-Z组血浆白蛋白明显上升(P<0.01),血糖和尿蛋白定量、尿β2微球蛋白水平均有下降(P<0.01);TGF-β1、Smad2、Smad3的mRNA在模型大鼠肾组织中表达明显下调,Smad7的mRNA明显下调。干预效果与贝那普利相近。结论:保元Ⅱ号对糖尿病大鼠肾脏有保护作用,其机制可能与调节肾脏中TGF-β1和Smad2,Smad3,Smad7表达水平有关。更多还原

【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,urinaryβ2-M were determined and expression of mRNA of TGF-β1,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,urinaryβ2-M was depressed in BaoYuan II-treatment group.The expression of TGF-β1 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-β1 and Smad2,Smad3,Smad7 possibly.更多还原