持续小剂量他达拉非改善海绵体神经损伤后阴茎海绵体纤维化的研究  被引量:4

Early chronic low-dose tadalafil administration prevents corporal fibrosis following cavernous nerve injury in rats

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作  者:卞军[1] 刘存东[1] 杨建昆[1] 周其[1] 赵李峰[1] 薛康颐[1] 孙祥宙[2] 邓春华[2] 

机构地区:[1]南方医科大学第三附属医院泌尿外科,广州510630 [2]中山大学附属第一医院泌尿外科

出  处:《中华实验外科杂志》2013年第6期1189-1191,共3页Chinese Journal of Experimental Surgery

基  金:国家自然科学基金资助项目(30901487);山东省医学科研基金资助项目(A2010360)

摘  要:目的观察早期持续d,N量他达拉非应用对海绵体神经(CN)损伤后勃起功能障碍(ED)大鼠阴茎海绵体纤维化的改善作用。方法将36只雄性SD大鼠随机分为治疗组、CN损伤组、假手术组,每组12只。治疗组、CN损伤组均予钳夹损伤CN。治疗组大鼠手术当天即开始给予小剂量他达拉非(2mg/kg,加入饮水中)灌胃治疗,CN损伤组不作任何治疗,假手术组仅对CN进行暴露,不作任何处理。术后4周行阿朴吗啡(APO)试验、阴茎转化生长因子-β1(TGF-β1)免疫组织化学分析、阴茎Masson染色分析海绵体平滑肌/胶原纤维比率。结果APO试验结果:术后4周进行,观察30min,治疗组大鼠阴茎勃起率和平均勃起次数分别为54.55%(6/11)和(1.12±0.81)次,CN损伤组均为0,假手术组为100%(12/12)和(2.11±0.86)次,治疗组阴茎勃起率及平均勃起次数均较CN损伤组显著增加(P〈0.05),显示术后4周治疗组较CN损伤组勃起功能好。TGF-β1免疫组织化学结果:治疗组、CN损伤组、假手术组大鼠阴茎海绵体TGF-β1相对表达强度分别为14.12±3.72、26.45±5.33、8.37±1.25,治疗组较CN损伤组大鼠阴茎海绵体TGF-β1表达显著增强(P〈0.05)。阴茎Masson染色结果:术后4周治疗组、CN损伤组、假手术组大鼠阴茎海绵体平滑肌/胶原纤维比例分别为0.31±0.08、0.20±0.05、0.52±0.11,治疗组较CN损伤组平滑且几/胶原纤维比例湿著升高(P〈0.05)。结论早期持续小剂量他达拉非早期治疗可改善CN损伤后阴茎海绵体纤维化,有助于阴茎勃起功能的恢复。Objective To investigate the preventive e'ffect of early chronic tadalafil administration on corporal fibrosis induced by cavernous nerve injury (CNI) in rats. Methods Thirty-six male Sprague- Dawley rats were randomly divided into three groups: no CNI (sham, n = 12), bilateral CNI exposed to ei- ther no tadalafil ( CN crush, n = 12) or tadalafil ( treatment, n = 12) at a dose (2 mg/kg) daily postoperation for 4 weeks. At the time point, we assessed erectile function by apomorphine test. Then immunohisto-chemical antibody staining was performed for transforming growth factor-β1 (TGF-β1). And the Masson staining was used to quantitatively analyze the ratio of smooth muscle to collagen fibers in corpus caverno- sum. Results Penile erection was observed in 54. 55 % (6/11) of the rats for ( 1.12±0. 81 ) times within 30 min in treatment group, as compared with 0% (0/11) of the rats for (0. 00±0. 00) time in CN crush group (P〈O. 05), and 100% (12/12) of the rats for (2. 11±0.86) time in sham group (P〈0.05). The expression of TGF-β1 was significantly weaker in treatment group than in CN crush group ( 14. 12±3.72 vs. 26.45±5.33, P 〈0. 05). The ratio of smooth muscle to collagen fibers in corpus cavernosum in treatment group was significantly higer than that in CN crush group ( 0. 31±0. 08 vs. 0. 20 ±0. 05, P 〈 0. 05 ). Conclusion Early chronic low-dose tadalafil administration can improve fibrosis of corpus caverno- sum induced by CNI and contributes to restoration of erectile function.

关 键 词:海绵体神经 钳夹 勃起功能障碍 他达拉非 大鼠 

分 类 号:R698.1[医药卫生—泌尿科学]

 

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