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中国临床药理学与治疗学 ›› 2006, Vol. 11 ›› Issue (4): 427-431.

• 研究原著 • 上一篇    下一篇

缓激肽B2受体在缬沙坦抑制心肌细胞肥大中的作用研究

赵艳峰, 徐江, 郑亚萍, 王虹1, 屈雪菊2   

  1. 武汉大学医学院生理学系, 1中南医院老年病研究所,2湖北省过敏及免疫相关疾病重点实验室, 武汉430071, 湖北
  • 收稿日期:2005-11-03 修回日期:2005-12-15 出版日期:2006-04-26 发布日期:2020-12-08
  • 通讯作者: 徐江, 男, 硕士生导师, 主要从事高血压冠心病的研究。E-mail:xjiang88@yahoo.com
  • 作者简介:赵艳峰, 女, 硕士研究生, 主要从事高血压心肌肥厚的研究。Tel:027-87331345  E-mail:douzi1125@yahoo.com

Role of bradykinin B2 receptor in AT1 antagonist inhibition of Ang Ⅱ-induced cardiomyocyte hypertrophy in neonatal rats

ZHAO Yan-feng, XU Jiang, ZHENG Ya-ping, WANG Hong1, QU Xue-ju2   

  1. Department of Physiology, WuhanUniversity School of Medicin, Wuhan 430071, Hubei, China;
    1Department of Geriatric Research, Zhongnan Hospital of Wuhan University, Wuhan 430071, Hubei, China;
    2Hubei Key Laboratory of Allergy and Immune-related Diseases, Wuhan 430071, Hubei, China
  • Received:2005-11-03 Revised:2005-12-15 Online:2006-04-26 Published:2020-12-08

摘要: 目的:探讨缓激肽(BK) B2受体在缬沙坦(valsartan)抑制血管紧张素Ⅱ(Ang Ⅱ) 诱导的新生大鼠心肌细胞肥大中的作用及可能机制。方法:经差速贴壁法获得新生大鼠心肌细胞, 随机分为对照组、Ang Ⅱ组、缬沙坦组、Ang Ⅱ +缬沙坦组、Hoe-140 组和Ang Ⅱ +缬沙坦+Hoe-140 组。采用流式细胞仪技术检测细胞大小和蛋白含量, 硝酸还原酶法测定上清液中NO 含量, 放射免疫法测定细胞内cGMP 水平。结果:与对照组相比, 10-7mol·L-1 Ang Ⅱ显著增加心肌细胞大小和蛋白含量, 降低心肌细胞NO 生成(P<0.01), 10-5mol·L-1缬沙坦显著降低Ang Ⅱ诱导的心肌细胞肥大和蛋白合成增加(P <0.01), 促进心肌细胞NO(P <0.05) 和cGMP 生成(P <0.01), BKB2 受体阻断剂Hoe-140 可部分阻断缬沙坦的上述作用。结论:BK B2受体部分介导了缬沙坦抑制心肌细胞肥大的效应, 该作用与NO 、cGMP 生成有关。

关键词: 缓激肽, 缓激肽B2 受体, 缬沙坦, 血管紧张素Ⅱ, 心肌细胞, 一氧化氮, 环磷酸鸟苷

Abstract: AIM: To investigate the role of the bradykinin (BK) B2 receptor in the inhibitory effect of valsartan on angiotensin Ⅱ (Ang Ⅱ)-induced cardiomyocyte hypertrophy.METHODS: Neonatal rat cardiomyocytes were randomly divided into 6 groups:control, Ang Ⅱ, valsartan, Ang Ⅱ +valsartan, Hoe-140 (a specific BK B2 receptor antagonist) and Ang Ⅱ +valsartan +Hoe-140. Flow cytometry (FCM) was used to evaluate the size and protein content of cardiomyocytes.Nitric oxide (NO) and intracellular cyclic GMP (cGMP) were measured by colorimetry and radioimmunoassay. RESULTS: 10 -7 mol·L -1 Ang Ⅱ significantly increased the size and protein content of cardiomyocytes compared to control (P < 0.01 for both), which was inhibited by 10 -5 mol·L -1 valsartan (P <0.01).10 -6 mol·L -1 Hoe-140 partially blocked the inhibitory effects of valsartan (P <0.05 or P <0.01 vs.Ang Ⅱ +valsartan, respectively).In the Ang Ⅱgroup, NO was markedly decreased (P <0.01 vs. control);valsartan significantly increased NO and intracellular cGMP compared to the Ang Ⅱgroup (P <0.01 for both), and the effect of valsartan was attenuated by Hoe-140 (P <0.01 or P <0.05 vs.Ang Ⅱ +valsartan, respectively).CONCLUSION: The BK B2 receptor may partially mediate the antihypertrophic action of valsartan in Ang Ⅱ-induced cardiomyocyte hypertrophy, and the elevation of NO and cGMP may contribute to the cardioprotective effects of BK.

Key words: bradykinin, bradykinin B2 receptor, valsartan, angiotensin Ⅱ, cardiomyocyte, NO, cGMP

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