雄激素对损伤的血管内皮细胞功能的影响

目的 :观察雄激素对球囊损伤的血管内皮细胞功能的影响。方法 :12只雄性家兔随机等分为替代组和单纯去势组 ,均于去势术后 2周行右侧髂动脉内皮剥脱术 ,替代组同时给予十一酸睾酮。观察去势前、脱内皮术后1周、2周血浆一氧化氮 (NO)、内皮素 1(ET 1)水平的变化 ;脱内皮术后 2周将动物处死 ,取损伤血管段 ,应用免疫组织化学法观察血管细胞粘附分子 1(VCAM 1)的表达和应用HE染色观察血管病理形态的变化。结果 :与单纯去势组相比 ,替代组脱内皮术后 1周、2周血浆NO水平 (μmol L)明显降低 [1周时 :(46 .70± 12 .6 5 )vs(75 .6 2± 16 .0 4 ) ,2周时 :(6 5 .0 3± 16 .2 9)vs(12 5 .4 9± 2 2 .4 5 ) ,P均 <0 .0 1];血浆ET 1水平 (pg ml)明显升高 [1周时 :(14 5 .2 1± 11.4 0 )vs(118.6 6± 12 .82 ) ,2周时 :(111.16± 13.0 1)vs(81.2 8± 7.80 ) ,P <0 .0 0 1或 0 .0 1];脱内皮术后 2周损伤血管组织VCAM 1表达明显增强 [(0 .346 5± 0 .0 0 84 )vs(0 .310 9± 0 .0 0 5 6 ) ,P <0 .0 0 1];损伤血管内膜面积 (mm2 )和内膜 中膜面积比值明显增大 [(1.6 5± 0 .39)vs(0 .6 5± 0 .18) ,(0 .92± 0 .2 0 )vs(0 .38± 0 .0 7) ,P均 <0 .0 1]。结论 :雄性兔去势后补充该实验剂量的睾酮使血清睾酮水平升高可?

Effect of Androgen on Vascular Endothelial Cell Function in Rabbits of Balloon Injury

Objective: To study the influence of androgen on vascular endothelial cell function in rabbits of balloon injury. Methods: Twelve male rabbits were randomly divided into two groups: treatment group and only castrated group. All animals were castrated and performed deendothelializing balloon injury in right iliac artery. Treatment group was received androgen replacement therapy. Nitric oxide(NO) and endothelin 1(ET 1) were measured in different intervals during the experiment. After 2 weeks of endothelial denudation all animals were killed, vascular cell adhesion molecule 1(VCAM 1) expression was tested with immunohistochemistry and morphological changes were observed with HE staining. Results: Compared with only castrated group ,plasma NO levels were significantly reduced and plasma ET 1 levels were significantly increased at 1 week and 2 weeks after endothelial denudation in treatment group(P<0.01). Meantime VCAM 1 expression and the neointimal area were increased in treatment group(P<0.001 and P<0.01,respectively). Conclusion: The high levels of androgens can injury endothelial cell function and promote neointimal formation.