糖尿病大鼠膀胱病理变化及胰岛素治疗的影响

目的观察糖尿病大鼠膀胱逼尿肌形态学表现和生理变化以探讨糖尿病大鼠膀胱收缩功能减退的病理基础以及胰岛素治疗对其的影响。方法6周和10周正常组鼠、糖尿病观察组鼠、糖尿病胰岛素治疗组鼠各7只,观察测量其膀胱残余尿量、压力-容量曲线并留取逼尿肌标本,进行光镜和电镜病理检查。结果与对照组比较,糖尿病观察组膀胱残余尿明显增多,压力峰值明显降低,而胰岛素治疗组曲线基本与对照组相同;光镜下可见逼尿肌肌束排列紊乱松散,胶原纤维减少;电镜下可见逼尿肌细胞间胶原纤维和中间连接减少,线粒体空泡变性。而胰岛素治疗组与对照组比较,光镜及电镜下表现均无差异。结论糖尿病大鼠早期即可出现逼尿肌形态学改变以致收缩功能下降,早期给予胰岛素治疗可以预防或减轻上述变化。

Pathological change of bladder and its effect of insulin treatment in diabetic rats

Purpose To study the pathologic basis underlying contractile hypofunction of bladder in diabetic rats and the effect of insulin treatment on it through observing histopathologic and physiologic alterations.Methods 42 SD rats were equally grouped into six(e.g.6 weeks and 10 weeks normal groups,6 weeks and 10 weeks diabetic groups,6 weeks and 10 weeks diabetic groups treated with insulin).Residual urine volume(RUV) and bladder volume-pressure curve were measured.The histopathologic appearance was observed wit...