小肠黏膜下层移植修复海绵体神经损伤的实验研究

目的:研究小肠黏膜下层(SIS)移植替代损伤的双侧海绵体神经(CN)恢复大鼠的勃起功能。方法:制备SIS,建立动物模型,分为CN损伤组、假手术组、SIS移植组,分别给予切断双侧的CN、仅游离CN以及SIS移植修复损伤的CN。术后3个月进行阿朴吗啡试验,了解阴茎勃起情况。取中、后段阴茎海绵体组织,进行nNOS免疫组化染色,记录nNOS阳性神经纤维的数目。结果:阿朴吗啡试验:30 min内SIS移植组72.73%(8/11)的大鼠出现阴茎勃起,平均勃起(1.07±0.89)次;CN损伤组勃起率和勃起次数均为0;假手术组则为90.91%(10/11)和(2.19±1.17)次。无论是勃起率还是勃起次数,SIS移植组均显著高于CN损伤组(P<0.01),但仍然比假手术组低(P<0.05)。nNOS神经纤维数目:SIS移植组为(70.36±10.09)条,CN损伤组为(22.09±4.76)条,差异有统计学意义(P<0.01),但二者均低于假手术组(90.81±5.69)条,P<0.01]。结论:SIS作为移植物修复损伤的大鼠CN损伤,有利于恢复CN损伤所致的勃起功能障碍。

Restoration of erectile function by reconstructing cavernous nerves with small intestinal submucosa grafts

Objective:To investigate the restoration of erectile function by reconstructing cavernous nerves(CN) with small intestinal submucosa(SIS) grafts.Methods:We prepared SIS grafts,established rat models and divided the models into a CN ablation, a sham-operation and an SIS graft group.The CNs at both sides were severed with 1 cm ablated in the first group,and 0.5 cm removed in the third,followed by reconstruction with the SIS grafts.Three months after surgery,the apomorphine test was performed to evaluate the e...