【摘要】 目的:研究中药水蛭对糖尿病肾病(DN)大鼠ET-1水平、肾脏功能及肾脏结构的影响。方法:链脲佐菌素(STZ)诱导DN大鼠模型,随机分成模型组,水蛭(17.5 g/kg、8.75 g/kg)治疗组,卡托普利组,同时另设正常对照组,治疗6 w,测定肾功能及肾脏指数(肾重/体重),放免法检测ET-1水平,免疫组化法检测肾脏ET-1蛋白表达,并对肾组织进行光镜和电镜观察。结果:模型组大鼠ET-1水平、表达及肾脏指数明显增高,水蛭治疗6 w后,肾脏肥大明显改善,ET-1水平、蛋白表达明显降低。结论:水蛭可纠正DN大鼠早期肾脏高滤过、高灌注,并对肾脏病变有一定的保护作用,其部分机制可能是通过下调ET-1水平及表达而实现的。更多还原

【Abstract】 AIM:To study the effect of Hirudo on level of Endothelin-1(ET-1),kidney structure and function in diabetic nephyropathy(DN) rats. METHODS: STZ-induced DN rats were randomly divided into four groups: model group,Hirudo(17.5 g/kg,8.75 g/kg) treatment group,and captopril group,in addition,normal rats for control group.All rats were given by ig for 6 weeks.Kidney function and kidney index(kidney weight/body weight) were determined,the level of ET-1 was determined by Radioimmunoassay,the expression of ET-1 in the kidney tissue by immunohistochemicai,and kidney tissue was observed by lightmicroscope and transmission electron microscope. RESULTS: The level and expression of ET-1,kidney index in DN rats significantly increased.The level and expression of ET-1 markedly decreased in Hirudo treatment group,and kidney pathologic changes of DN rats in Hirudo treatment group were improved. CONCLUSION: Hirudo can ameliorate early kidney hyperdynamic abnormality in DN rats,possess protective effect on kidney of DN rats,whose mechanism may be associated partly with a down-regulation of levels and expression of ET-1.更多还原