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山东大学学报(医学版) ›› 2012, Vol. 50 ›› Issue (10): 68-72.

• 基础医学 • 上一篇    下一篇

奥美沙坦对腹主动脉结扎大鼠肾脏的保护作用

王建萍1,2,刘瑞华3,李忠臣4,张秀珍3,王新贤4,关广聚1   

  1. 1.山东大学第二医院肾内科, 济南 250033; 2.烟台毓璜顶医院血液净化中心, 山东 烟台 264000;
    3.烟台毓璜顶医院超声科, 山东 烟台 264000; 4.烟台市市直机关医院, 山东 烟台 264000
  • 收稿日期:2012-07-19 出版日期:2012-10-10 发布日期:2012-10-10
  • 通讯作者: 关广聚(1952- ),男,教授,博士生导师,主要从事肾脏病研究。 E-mail:guangj@sdu.edu.cn
  • 作者简介:王建萍(1972- ),女,博士研究生,主治医师,主要从事肾脏病研究。

Protective effects of olmesartan on renal injury induced by
abdominal aortic banding in rats

WANG Jian-ping1,2, LIU Rui-hua3, LI Zhong-chen4, ZHANG Xiu-zhen3,
WANG Xin-xian4, GUAN Guang-ju1   

  1. 1. Department of nephrology, The Second Hospital of Shandong University, Jinan 250033, China;
    2. Department of hemopurification center, Yantai Yuhuangding Hospital, Yantai 264000, Shandong, China;
    3. Department of ultrasound, Yantai Yuhuangding Hospital, Yantai 264000, Shandong, China;
    4. Municipal hospital of yantai city government, Yantai 264000, Shandong, China
  • Received:2012-07-19 Online:2012-10-10 Published:2012-10-10

摘要:

目的   应用肠系膜上动脉以上部位结扎腹主动脉建立左心室肥厚大鼠模型,观察奥美沙坦对腹主动脉结扎大鼠肾脏损害的保护作用。方法   Wistar大鼠随机分为假手术组(n=13)和手术组(n=26),术后10d将手术组大鼠随机分为模型组及奥美沙坦组[1mg/(kg·d)灌胃]。连续治疗7周后,进行彩色超声心动图检查模型组大鼠存在左心室肥厚,奥美沙坦组左心室壁厚度同假手术组,随后进行肾脏多普勒超声检查,观察肾脏病变。应用ELISA方法观察血浆和肾脏血管紧张素Ⅱ(AngⅡ)的变化,肾脏组织行Masson染色观察大鼠肾脏胶原纤维沉积情况,采用免疫组化方法检测Bax、Bcl-2、Caspase-3蛋白的表达。结果   奥美沙坦组与模型组相比肾实质回声无增强,肾动脉阻力指数降低。应用奥美沙坦药物干预后,腹主动脉结扎大鼠肾脏AngⅡ水平显著降低,肾小管间质纤维化病变消失,且能抑制Bax、Bcl-2、Caspase-3蛋白在肾小管上皮细胞中的表达。结论   腹主动脉结扎导致模型组大鼠肾间质纤维化,奥美沙坦可能通过抑制肾脏局部AngⅡ的生成和调控凋亡途径起到肾脏保护作用。

关键词: 奥美沙坦;腹主动脉结扎;肾间质纤维化;血管紧张素Ⅱ;细胞凋亡

Abstract:

Objective   To establish the rat model with left ventricular hypertrophy by coarctation of abdominal aorta above superior mesenteric artery and to evaluate protective effects of olmesartan on kidney injuries. Methods   Wistar rats were randomly divided into sham-operated group(n=13) and operating group(n=26). Then the surgical rats were subdivided into olmesartan-treated group(1mg/kg·d)) and hypertension(HTN) group. Seven weeks after treatments, left ventricular hypertrophy and kidney injuries were analyzed in vivo by M-mode echocardiography and ultrasonography respectively. AngiotensinⅡ( Ang Ⅱ) in plasma and renal tissue was observed by ELISA method. Morphologic features and collagen deposition in kidneys were examined by Masson staining. Expressions of Bax, Bcl-2 and Caspase-3 were evaluated by immunohistochemistry. Results   Compared with HTN group, renal parenchymal echogenicity was unchanged and renal vascular resistive index was lower in olmesartan group by doppler ultrasound examination. Moreover olmesartan significantly decreased Ang Ⅱin the renal local tissue, prevented formation of tubulointerstitial fibrosis and inhibited the expressions of Bax, Bcl-2 and Caspase-3 proteins. Conclusion   Olmesartan is able to protect kidney against the injury induced by abdominal aortic banding, which might due to decreased expression of AngⅡin kidney and the inhibition of apoptosis pathway.

Key words: Olmesartan; Abdominal aortic banding; Tubulointerstitial fibrosis; AngiotensinⅡ; Apoptosis

中图分类号: 

  • R692
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