前列腺癌根治术后勃起功能障碍动物模型的建立

目的 对大鼠海绵体神经(CN)进行解剖并对其造成钳夹损伤,以建立前列腺癌根治术(RP)后勃起功能障碍(ED)的动物模型.方法 将36只雄性SD大鼠随机分为模型组、假手术组、正常组,术后4周通过阿朴吗啡(APO)实验及海绵体内压(ICP)/平均动脉压(MAP)测定、阴茎神经型一氧化氮合酶(nNOS)免疫组织化学检测以评估建立模型的效果.结果 术后4周3组大鼠的阴茎勃起率和平均勃起次数分别为0%和0次、100%(11/11)和(2.24±0.86)次、100%(12/12)和(2.39±0.92)次.模型组大鼠无明显勃起反应,假手术组、正常组可见明确勃起反应.电刺激盆腔星状神经节(MPG)前3组大鼠ICP/MAP分别为(0.13±0.04)、(0.10±0.03)、(0.12±0.03),电刺激MPG后分别为(0.12±0.05)、(0.57±0.08)、(0.58±0.06),电刺激MPG前3组ICP/MAP差异均无统计学意义(P＞0.05),模型组与假手术组、正常组的电刺激MPG后ICP/MAP差异有统计学意义(P＜0.05).3组大鼠阴茎nNOS阳性神经纤维数分别为(23.04±2.59)、(73.94±7.51)、(80.26±6.95),模型组大鼠阴茎nNOS阳性神经纤维数明显少于假手术组、正常组(P＜0.05).结论 大鼠CN结构与人类非常相似,CN钳夹损伤是建立RP术后ED模型的可靠的方法.

Abstract：

Objective To identify rat cavernous nerve (CN) and develop a rat model of erectile dysfunction (ED) after radical prostatectomy (RP) caused by injury of cavernous nerve.Methods Thirty-six male SD rats were were randomly divided into 3 groups:model group,sham-operation group and nomal group.Four weeks after surgery,rat models were evaluated by apomorphine test,ICP/MAP measurement and nNOS-positive nerve fibres in penis.Results The rats in model group had no erectilty in apomorphine test and electical stimulating MPG.The rats in sham-operation group and nomal group had erectility at the same conditions,accompanied with increased ICP/MAP in electrical stimulation ( P＜0.05 ).The nNOS-positive nerve fibres in model group ( 23.04 ± 2.59 ) were less than those in sham-operation group (73.94 ±7.51 ) and normal group (80.26 ±6.95 ).Conclusion Cavernous nerve in rats is highly similar to that in human beings.The rat model of erectile dysfunction after radical prostatectomy caused by cavernous nerve crush injury is reliable.

Development of animal model for erectile dysfunction after radical prostatectomy

Objective To identify rat cavernous nerve (CN) and develop a rat model of erectile dysfunction (ED) after radical prostatectomy (RP) caused by injury of cavernous nerve.Methods Thirty-six male SD rats were were randomly divided into 3 groups:model group,sham-operation group and nomal group.Four weeks after surgery,rat models were evaluated by apomorphine test,ICP/MAP measurement and nNOS-positive nerve fibres in penis.Results The rats in model group had no erectilty in apomorphine test and electical stimulating MPG.The rats in sham-operation group and nomal group had erectility at the same conditions,accompanied with increased ICP/MAP in electrical stimulation ( P＜0.05 ).The nNOS-positive nerve fibres in model group ( 23.04 ± 2.59 ) were less than those in sham-operation group (73.94 ±7.51 ) and normal group (80.26 ±6.95 ).Conclusion Cavernous nerve in rats is highly similar to that in human beings.The rat model of erectile dysfunction after radical prostatectomy caused by cavernous nerve crush injury is reliable.