摘要
目的观察桑精胶囊对2型糖尿病大鼠胰岛素抵抗的治疗效应及其分子机制。方法应用小剂量链脲佐茵素加高热量饲料饲养的方法建立实验性2型糖尿病大鼠模型,观察桑精胶囊灌胃6周对葡萄糖耐量、血清胰岛素、甘油三酯、总胆固醇、高密度脂蛋白-胆固醇、游离脂肪酸和胰岛素敏感性指数的影响,以逆转录聚合酶链式反应(RT-PCR)测定肝脏胰岛素样生长因子1(IGF-1)mRNA表达及蛋白印迹(Western-blot)检测骨骼肌葡萄糖转运子4(GLUT4)水平。结果桑精胶囊能减轻2型糖尿病大鼠体重,改善糖耐量和调节脂代谢,降低血清游离脂肪酸,减轻高胰岛素血症,提高胰岛素敏感性,且表现为剂量-效应关系。与正常组相比,模型组肝脏IGF-1 mRNA表达水平及骨骼肌GLUT4含量及胰岛素敏感指数明显下降(P＜0．01)；与模型组相比,桑精胶囊组肝脏IGF-1 mRNA及骨骼肌GLUT4含量表达明显上升(P＜0．01或P＜0．05)。结论桑精胶囊能改善2型糖尿病大鼠之胰岛素抵抗,并可能与其改善脂代谢,降低游离脂肪酸有关,其分子机制可能与增加骨骼肌GLUT4蛋白含量,上调肝脏IGF-1 mR- NA表达水平有关。
Objective To explore the therapeutic effects and its molecular mechanisms of Sangjing Capsule (SJC)against insulin resistance in type 2 diabetic rats.Methods The type 2 diabetic model rats were induced by injection with streptozotocin(STZ)at a dose of 25 mg/kg and fed on high caloric diet.The levels of glucose toler- ance,serum insulin,triglycerides,total cholesterol,high density lipopreteins-cholesterol,free fatty acids and in- sulin sensitivity index of type 2 diabetic rats were measured after treated SJC...
出处
《中国中西医结合杂志》
CAS
CSCD
北大核心
2005年第S1期81-86,共6页
Chinese Journal of Integrated Traditional and Western Medicine
