目的 观察2型糖尿病大鼠肾组织细胞周期蛋白依赖激酶9(Cdk9)和细胞周期蛋白(cyclin )T1蛋白的表达及小檗碱的影响.方法 小剂量注射链佐星(链脲菌素)加高糖高脂饲料喂养16周建立2型糖尿病大鼠模型,随后16周每天分别给予小檗碱75,150及300 mg·kg-1、非诺贝特100 mg·kg-1和罗格列酮4 mg·kg-1.处死大鼠后用HE染色检查肾组织结构和免疫组化技术检测Cdk9和cyclin T1的表达.结果 糖尿病模型大鼠肾小球体积增大,部分系膜细胞增生和系膜区扩张,肾小球及肾小管基底膜增厚,肾重/体重比值增加;150及300 mg·kg-1小檗碱和罗格列酮能部分改善糖尿病性肾组织病变和降低肾重/体重比值.150及300 mg·kg-1小檗碱和罗格列酮都能明显恢复糖尿病肾组织中降低了的Cdk9和cyclin T1表达至接近正常水平.结论 小檗碱通过调控肾组织Cdk9和cyclin T1的表达能部分改善实验性糖尿病大鼠肾组织病变.%AIM To investigate cyclin dependent kinase 9(Cdk9) and cyclin T1 protein expressions in diabetic rat kidney and the effect of berberine on them. METHODS Type 2 diabetes mellitus (T2DM) rats were induced by injection (ip) with diet for 16 weeks. From week 17 to 32, diabetic rats were given berberine 75, respectively. The kidney tissue structure was observed with hematoxylin/eosin (HE) staining, kidney to body weight ratio was calculated, and Cdk9 and cyclin T1 expressions were examined by immunohistochemistry. RESULTS Compared with control rats, the volume of diabetic model rat glomerulus accreted, some intercapillary cells proliferated and mesangial region expanded, both glomerular basement membrane and renal tubular basement membrane thickened. Treatment with diabetic nephropathy symptom. The diabetic kidney to body weight ratio protein expressions in diabetic kidney to near control level. CONCLUSION Berberine regulates Cdk9 and cyclin T1 protein expressions in diabetic kidney which may partly contribute to ameliorate nephropathy complication induced by STZ and the high-carbohydrate/high-fat diet.
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