黄连解毒汤对2型糖尿病大鼠血糖、腹主动脉血管内皮形态及缺氧诱导因子-1α的影响

Effects of Huanglian Jiedu Decoction on Blood Glucose, Abdominal Aortic Morphology and HIF-1α in Type 2 Diabetic Rats

目的观察黄连解毒汤对2型糖尿病大鼠空腹血糖(FBG)、空腹胰岛素(FINS)及腹主动脉血管内皮形态、缺氧诱导因子-1α(HIF-1α)表达的影响,并探讨其作用机制。方法采用小剂量链脲佐菌素腹腔注射联合高糖高脂饲料喂养Wistar大鼠,建立2型糖尿病模型。随机将大鼠分为空白组、模型组、对照组和治疗组。空白组、模型组灌服生理盐水,对照组灌胃二甲双胍,治疗组灌胃黄连解毒汤。6周后检测FBG、FINS,采用免疫组织化学法测定腹主动脉HIF-1α表达,HE染色法观察腹主动脉血管内皮形态变化。结果与模型组、对照组比较,治疗组腹主动脉HIF-1α表达、FBG均明显降低(P<0.01),FINS明显升高(P<0.01),腹主动脉血管内皮细胞的损伤得到明显改善。结论黄连解毒汤对损伤的血管内皮细胞有保护作用,其机制可能是通过抑制HIF-1α表达实现的。

Objective To observe effects of Huanglian Jiedu Decoction on fasting blood glucose （FBG）, fasting insulin （FINS）, abdominal aortic morphology and expression of HIF-1α in the abdominal aorta in rats with type 2 diabetes. Methods The rat model of type 2 diabetes was established by intravenous injection of streptozotocin and feeding with high sugar and high fat diet. Rats were randomly divided into blank group, model group, control group and treatment group. The blank group and model group were given normal saline by gavage, the control group was given metformin, and the treatment group was given Huanglian Jiedu Decoction. Six weeks later, the levels of FBG and FINS were determined. Immunohistochemical method was used to determine the expression of HIF-1α in abdominal aorta and HE staining method to observe the changes of abdominal aortic morphology. Results Compared with model group and control group, abdominal aorta of HIF-1α and FBG level of treatment group were significantly decreased （P 〈0.01）, FINS significantly increased （P 〈0.01）, and abdominal aortic endothelial cell injury was significantly improved. Conclusion Huanglian Jiedu Decoction has a protective effect on the injury of vascular endothelium, and its mechanism may be related with inhibiting the expression of HIF-1α.