慢性肾功能衰竭性勃起功能障碍大鼠阴茎海绵体有效成分的测定

目的:探讨慢性肾功能衰竭(CRF)性勃起功能障碍(ED)的发病机制。方法:应用SD雄性大鼠分两期行5/6肾脏切除术,建立CRF动物模型。将假手术组(NCRF组,n=30)、CRF模型大鼠(CRF组,n=45)分别随机均分为Ⅰ(2周)、Ⅱ(4周)、Ⅲ(6周)3组,并分别于2、4、6周注射阿朴吗啡(APO,80μg/kg)后观察大鼠阴茎勃起情况,筛选CRF性ED模型大鼠;测定阴茎海绵体组织一氧化氮合酶(NOS)的活性,及其组织的M asson染色图像分析。结果:CRF性ED大鼠阴茎海绵体组织NOS活性及平滑肌面积显著降低(P<0.01或P<0.05),胶原纤维略有增加,且上述变化与CRF病程密切相关。海绵窦血管腔无明显变化。结论:CRF严重影响阴茎勃起功能,阴茎海绵体组织NOS活性降低及阴茎海绵体平滑肌面积的减少可能是其重要的发病机制。

The Microstructure Studies of Penile Cavernous Tissue of Erectile Dysfunction Rat Models with Chronic Renal Failure

OBJECTIVE: To investigate the mechanism of erectile dysfunction (ED) in rat models with chronic renal failure (CRF). METHODS: Chronic renal failure was induced by adult male Sprague-Dawley rats, which were subjected to an excisional 5/6 nephrectomy. The rats in NCRF group and CRF group were divided into three groups randomly. Injected with apomorphine(APO, 80 microg/kg), penile erections of three groups were observed and noted by the 2nd week, 4th week respectively and 6th week from the 14th day of 5/6 nephrectomy and experimental models of ED with CRF were selected; NOS activity was examined and the microstructures of penile were observed under optical microscope with computer configuration image analysis system in selected rat models. RESULTS: Compared with the controls, the areas of smooth muscle and NOS activity in the penile cavernous tissue of ED rats with CRF decreased significantly (P < 0.01 or P < 0.05) , and collagen fibers slightly increased, and these alterations had close correlations with the duration of CRF. The CONCLUSIONS: Penile erection is seriously affected in rats with CRF. The decreases of areas of blood sinus had no obvious changes. the number of smooth muscles and NOS activity might be the most important factors.