天津医药 ›› 2015, Vol. 43 ›› Issue (5): 470-473.doi: 10.11958/j.issn.0253-9896.2015.05.006

• 实验研究 • 上一篇    下一篇

丹皮酚对急性心肌梗死后心室重构模型大鼠RAS的影响

顾媛媛, 周晓慧, 徐倩, 赵静怡#br# #br#   

  1. 承德医学院中药研究所 (邮编067000

  • 收稿日期:2014-08-29 修回日期:2015-01-09 出版日期:2015-05-15 发布日期:2015-05-25
  • 通讯作者: 周晓慧 E-mail: zxh5055@sina.com E-mail:a552195906@163.com
  • 作者简介: 顾媛媛 (1989), 女, 硕士研究生, 主要从事分子药理研究
  • 基金资助:
    河北省自然科学基金资助项目(C2011406009); 河北省医学科学研究重点课题计划 (20100137

Effects of paeonol on RAS occurred on the development of ventricular remodeling after acute myocardial infarction in rats

GU Yuanyuan, ZHOU Xiaohui, XU Qian, ZHAO Jingyi#br# #br#   

  1. Chengde Medical College, Chengde 067000, China

  • Received:2014-08-29 Revised:2015-01-09 Published:2015-05-15 Online:2015-05-25
  • Contact: ZHOU Xiaohui E-mail: zxh5055@sina.com E-mail:a552195906@163.com

摘要: 摘要:目的 观察丹皮酚对急性心肌梗死(AMI)后心室重构模型大鼠肾素-血管紧张素系统(RAS)的影响。方法 对健康雄性 SD 大鼠进行左冠状动脉前降支结扎, 复制 AMI 模型。设假手术组、 模型组、 卡托普利组、 丹皮酚低剂量 (6 mg/kg) 组、 丹皮酚中剂量 (9 mg/kg) 组和丹皮酚高剂量 (12 mg/kg) 组。造模成功并存活下来的大鼠, 分别给予各组不同药物处理。用药 4 周后取材, 采用 HE 染色法观察心肌组织病理变化; 采用实时荧光定量 PCR(Real-Time PCR)检测各组心肌组织中血管紧张素原(AGT)、 血管紧张素Ⅱ受体(AGTR) 1 和内皮缩血管肽 1(ET) -1 mRNA 水平表达情况并进行分析; 采用蛋白质免疫印迹法 (Western blot) 检测各组大鼠心肌组织中肽基二肽酶 A (ACE), 血管紧张素Ⅱ(Ang) -Ⅱ和 AGTR1 的蛋白表达水平。结果 与假手术组比较, 模型组大鼠心肌组织中 AGT、 AGTR1、 ET-1 的 mRNA 表达明显升高, Ang-Ⅱ、 ACE、 AGTR1 的蛋白表达亦显著升高(P < 0.05); 与模型组比较, 其在丹皮酚高剂量组和卡托普利组心肌组织中 mRNA 表达以及蛋白表达均显著降低 (P < 0.05)。丹皮酚对降低其 mRNA 表达和蛋白表达存在明显的剂量依赖性。结论 丹皮酚能够延缓大鼠 AMI 后心室重构, 其机制可能与抑制 RAS 的过度激活有关。

关键词: 心肌梗死, 心室重构, 肾素-血管紧张素系统, 血管紧张素原, 血管紧张素Ⅱ受体1, 内皮缩血管肽1, 肽基二肽酶A, 血管紧张素Ⅱ, 丹皮酚

Abstract: Abstract: Objective To investigate the effects of paeonol on renin-angiotensin system (RAS) occurred on the devel⁃ opment of ventricular remodeling after acute myocardial infarction (AMI) in rats. Methods The left anterior descending cor⁃ onary artery was ligated to establish the model of AMI in male SD rats. Six groups were set up: sham-operation group, AMI model group, captopril control group, paeonol low dose group (6 mg/kg), paeonol middle dose group (9 mg/kg) and paeonol high dose group (12 mg/kg). Rats were given treatment for 4 weeks after the AMI model was established. HE staining was used to observe changes of myocardial tissue. Real-time PCR was used to detect the mRNA levels of angiotensinogen (AGT), angiotensinⅡreceptor type1(AGTR1) and endothelin (ET)-1 of six groups. Western blot assay was used to detect the protein levels of peptidyl-dipeptidase A (ACE), angiotensin Ⅱ(Ang)-Ⅱand AGTR1 in six groups. Results The transcription of AGT, AGTR1, ET-1mRNA and the expressions of ACE, Ang-Ⅱand AGTR1 protein were significantly higher in myocardial tissue of AMI rats than those of sham-operation rats (P < 0.05). Compared with model group, the expressions of AGT, AG⁃ TR1, ET-1mRNA and ACE, Ang-Ⅱ, AGTR1 protein were significantly decreased in paeonol high dose group and captopril control group (P < 0.05). Paeonol reduced the expressions of those mRNA and protein levels in a significant dose dependent manner. Conclusion Paeonol can slow down the deterioration of the ventricular remodeling after AMI in rats, which may be related to the inhibition of over-activation of RAS.

Key words: myocardial infarction, ventricular remodeling, renin-angiotensin system, angiotensinogen, angiotensinⅡreceptor type1, endothelin-1, peptidyl-dipeptidase A, angiotensin Ⅱ, paeonol