甲磺酸伊马替尼对单侧输尿管梗阻小鼠肾脏间质纤维化的影响

目的 研究甲磺酸伊马替尼(STI 571)对单侧输尿管梗阻(UUO)小鼠肾间质纤维化的防治作用.方法 48只小鼠随机分为4组:假手术组,模型组,小剂量治疗组80 mg/(kg·d)],大剂量治疗组160 mg/(kg·d)].采用左侧输尿管双结扎的方法建立UUO模型,治疗组每天以80、160 mg/kg STI 571灌胃.于术后第8、11天分别处死各组小鼠6只.用酸水解-比色法测定肾组织胶原的含量;用免疫组化技术检测肾脏纤维连结蛋白(FN)的沉积.利用逆转录-聚合酶链反应(RT-PCR)观察FN和Ⅲ型胶原(Col Ⅲ) mRNA表达.结果 治疗组的肾组织胶原含量在术后第11天显著低于模型组(P<0.05),且不同剂量组之间差异有显著性意义(P<0.05).模型组和治疗组左肾FN含量随梗阻时间延长而逐渐增加,术后第11天治疗组的表达较模型组明显减低(P<0.05),且不同剂量组之间存在显著差异(均P<0.05).模型组FN和Col Ⅲα1 mRNA表达随梗阻时间延长而逐渐增加,在对应时间点上治疗组FN和Col Ⅲα1 mRNA表达较模型组明显减低(均P<0.05),且不同剂量组之间存在显著差异(P<0.05).结论 STI 571可显著减轻UUO小鼠梗阻侧肾脏间质纤维化,下调FN和Col Ⅲ的表达,减少肾间质细胞外基质的沉积,对UUO小鼠肾间质纤维化有一定防治作用.

Effects of Abl Protein Tyrosine Kinase on Renal Interstitial Fibrosis in UUO Mice

Objective To evaluate the effect of imatinib mesylate(STI571) on the process of renal interstitial fibrosis following unilateral ureteral obstruction(UUO) in mice.Methods Forty-eight male mice were randomly assigned to 4 groups:sham operation group,UUO group,low dose of STI571- and high dose of STI571-treated groups.The mice in treatment groups were given with ST571(80,160 mg/kg every day) after operation through intragastric administration.The mice were operated on by left ureter double ligature.Mice of ea...