ICCs细胞在糖尿病大鼠膀胱中的密度分布及其对糖尿病膀胱功能的影响

目的观察ICCs细胞(interstitial cells of Cajal,ICCs)在糖尿病(diabetes mellitus,DM)大鼠膀胱中的密度分布情况,探讨其在糖尿病膀胱逼尿肌肌条兴奋性改变以及膀胱功能改变中的作用。方法腹腔注射链脲佐菌素(strepto-zotocin,STZ)建立糖尿病SD大鼠模型。12周后,行充盈性膀胱测压,比较DM组大鼠与对照组膀胱残余尿量、最大膀胱容量、最大膀胱压力及膀胱顺应性变化;行离体逼尿肌肌条实验,比较肌条兴奋性与对照大鼠的差异;应用免疫组织荧光染色法检测2组大鼠膀胱ICCs细胞的密度分布情况。结果DM组大鼠膀胱残余尿量(0.50±0.28)ml]、最大膀胱容量(1.72±0.73)ml]和膀胱顺应性(0.04±0.02)ml/cmH2O]较对照组明显增加(P<0.01),而最大膀胱压力明显降低(P<0.05)。DM组逼尿肌肌条收缩频率较对照组明显降低(P<0.05),而且收缩幅度有降低趋势。DM大鼠膀胱ICCs细胞数量较对照组明显减少(P<0.01)。结论DM大鼠膀胱中ICCs细胞数量减少可能是糖尿病性膀胱病逼尿肌肌条兴奋性降低及在体膀胱功能改变的重要原因...

Density distribution of interstitial cells of Cajal in bladder of diabetic cystopathy rats and its role in bladder function

Objective To explore the density distribution of interstitial cells of Cajal(ICCs) in the bladder of rats with diabetes mellitus(DM) and its effects on the excitability of the detrusor and the bladder function.Methods Animal models of DM were made in SD rats by intraperitoneal injection of streptozotocin and identified by fast blood glucose over 16.7 mmol/L.There were 2 groups of rats,DM group(n=20) and age-matched group(n=10).The residual urine volume,the maximum bladder capacity,the maximum bladder pressu...