J4 ›› 2012, Vol. 38 ›› Issue (4): 618-622.

• 基础研究 • 上一篇    下一篇

罗布麻提取物对AngⅡ诱导的大鼠心肌纤维化中ERK通路的影响

苗春生1|景海燕2|尹俐1|李希宁1|任立群1   

  1. (1. |吉林大学药学院实验药理与毒理学教研室|吉林 长春 130021;2. 重庆市环境保护工程设计研究院有限公司|重庆 400020)
  • 收稿日期:2011-11-23 出版日期:2012-07-28 发布日期:2012-07-28
  • 通讯作者: 任立群 E-mail:(Tel: 0431-85619702,E-mail: rlq@jlu.edu.cn)
  • 作者简介:苗春生(1964-)|男|吉林省桦甸市人|主管技师|主要从事实验病理学研究。
  • 基金资助:

    国家自然科学基金资助课题(30872194)

Effect of apocynum venetum extract on ERK pathway in rat myocardial fibrosis induced by AngⅡ

MIAO Chun-sheng1|JING Hai-yan2|YIN Li1|LI Xi-ning1|REN Li-qun1   

  1. (1.  |Department of Experimental Pharmacology and Toxicology,School of Pharmacy,Jilin University,Changchun 130021,China;2. Chongqing Environmental Protection Engineering Design and Research Institute Limited Company,Chongqing 400020,China)
  • Received:2011-11-23 Online:2012-07-28 Published:2012-07-28

摘要:

目的:探讨罗布麻提取物对血管紧张素Ⅱ (Ang Ⅱ)诱导的大鼠心肌纤维化模型中ERK通路的影响,并初步探索罗布麻提取物抗心肌纤维化机制。 方法: 采用1×10-6 mol•L-1 Ang Ⅱ诱导大鼠心肌成纤维细胞复制心肌纤维化模型,细胞分为正常对照组、AngⅡ组、缬沙坦治疗组1×10-6 mg•L-1)及罗布麻提取物高剂量组(0.8 mol•L-1)、中剂量组(0.4 mol•L-1)、低剂量组(0.2 mol•L-1)。通过对羟脯氨酸及Ⅰ、Ⅲ型胶原(ColⅠ、ColⅢ)的检测鉴定模型的成功复制,RT-PCR及 Western blotting方法检测raf、ERK、c-fos mRNA 及ERK蛋白在各组细胞中的表达量。 结果: 成功建立Ang Ⅱ诱导的心肌纤维化模型。与AngⅡ组比较,不同剂量罗布麻提取物组羟脯氨酸及ColⅠ、ColⅢ的表达量均下调(P<0.05或P<0.01);RT-PCR及 Western blotting检测发现,罗布麻提取物不同剂量组的raf、ERK、c-fos mRNA 及ERK蛋白表达量较AngⅡ组降低(P<0.05或P<0.01)。结论: ERK信号通路在罗布麻提取物调控心肌纤维化发生和发展的过程中发挥重要作用。

关键词: 罗布麻提取物;心肌纤维化; ERK通路

Abstract:

Abstract:Objective
To investigate the influence of apocynum venetum extract (AVE) on angiotensin Ang Ⅱ-induced myocardial fibrosis in rats and to clarify its mechanism of anti-myocardial fibrosis.Methods The rat cardiac fibroblasts were pretreated with Ang Ⅱ,and then treated with different concentrations of AVE (0.8,0.4 and 0.2 mol•L-1) or valsartan 10-6 mg•L-1.The expressions of hydroxyproline,collagen Ⅰ,Ⅲ (ColⅠ,ColⅢ) were detected to identify the model of myocardial fibrosis.The expressions of  raf,ERK and c-fos mRNA were determined by RT-PCR.The expression of ERK protein was measured by Western blotting.Results The models of myocardial fibrosis were established successfully.Compared with AngⅡ group,the over expressions of  hydroxyproline,ColⅠ and ColⅢ in AVE groups were significantly decreased(P<0.05 or P<0.01).Compared with control group,the expressions of raf,ERK and c-fos were increased obviously in Ang Ⅱ group;compared with Ang Ⅱ group,the expressions of raf,ERK and c-fos mRNA and ERK protein in AVE groups were decreased(P<0.05 or P<0.01).Conclusion ERK pathway plays an important role in the occurrence and development of mycardiol fibrosis regulated by AVE.

Key words: apocynum venetum extract;myocardial fibrosis;ERK pathway

中图分类号: 

  • R-332