摘要
目的 探讨早期抑制纤维化能否阻止大鼠糖尿病肾病的发生。方法 将72只SD大鼠随机分为3组:正常对照组、糖尿病组和干扰素γ(IFNγ)组。除正常对照组外,其余两组采用一次性ip链佐星70mg·kg- 1 ·d- 1 制备糖尿病模型。IFNγ组的糖尿病大鼠scIFNγ( 1 0 0kU·kg- 1 ·d- 1 )共8周。第1 ,2 ,4 ,8周每组各取6只大鼠,分别测定血糖、肾脏肥大指数、尿白蛋白,免疫组化法测定肾组织α平滑肌肌动蛋白(αSMA)和Ⅳ型胶原的表达,同时以酶联免疫吸附法测定肾皮质αSMA的含量。结果 第1 ,2 ,4 ,8周,IFNγ组大鼠肾皮质αSMA含量分别较糖尿病组减少3 6.9%,4 4.4 %,60 .4 %和4 0 .6%(P <0 .0 5 )。但IFNγ组肾脏Ⅳ型胶原表达、肾脏肥大指数均高于正常对照组(P <0 .0 1 ) ,与糖尿病组无显著性差异(P>0 .0 5 )。结论 该剂量IFNγ抑制肾组织αSMA表达。
AIM To investigate whether inhibition of fibrosis in early stage can prevent diabetic nephropathy in rats. METHODS Seventy-two Sprague-Dawley(SD) rats were randomly divided into 3 groups: normal control, diabetic and diabetic rats treated with IFNγ subcutaneously(100 kU·kg^(-1)·d^(-1)) for 8 weeks. Diabetic model was made by a single intraperitoneal injection of streptozocin in a dose of 70 mg·kg^(-1). Six rats from each group were sacrificed at the end of week 1, 2, 4, 8, respectively. At each time-point, serum glucose, kidney hypertrophy index, urinary albumin excretion were detected. α Smooth muscle actin(αSMA) and collagen Ⅳ expression were studied by immunohistochemistry. The content of αSMA in renal cortex was also detected by enzyme-linked immunosorbent assay. RESULTS(At the end of) week 1, 2, 4 and 8, the content of α SMA in renal cortex of IFNγ group decreased (36.9%), 44.4%, 60.4% and 40.6%, respectively (as compared) with diabetic group(P<0.05, n=5,6). Kidney hypertrophy index and collagen Ⅳ expression in IFNγ group were all higher than those of normal control rats, as well as diabetic rats. CONCLUSION Although IFNγ inhibits the expression of αSMA, it can′t prevent diabetic nephropathy.
出处
《中国药理学与毒理学杂志》
CAS
CSCD
北大核心
2005年第2期118-123,共6页
Chinese Journal of Pharmacology and Toxicology
基金
浙江省自然科学基金资助项目 ( 3 0 0 5 0 6 )
浙江省科技厅基金资助项目 ( 2 0 0 3c3 3 0 0 5 )~~
关键词
糖尿病
肾病变
蛋白表达
肌动蛋白类
干扰素Γ
diabetes mellitus
nephrosis
protein expression
actins
interferon gamma