基础医学与临床 ›› 2017, Vol. 37 ›› Issue (9): 1226-1230.

• 研究论文 • 上一篇    下一篇

白藜芦醇减轻异丙肾上腺素诱导的大鼠心肌细胞肥大

王珺,肖薇,李波,金莉,于秀文,廉洁,李梦瑶,李鑫鹏,周晋宇,林岩   

  1. 齐齐哈尔医学院
  • 收稿日期:2016-08-21 修回日期:2016-12-20 出版日期:2017-09-05 发布日期:2017-08-28
  • 通讯作者: 林岩 E-mail:yanlinqqhr@yahoo.com.cn
  • 基金资助:
    国自然基金项目;齐齐哈尔医学院博士专项;齐齐哈尔医学院自选课题

Resveratrol alleviates ISO-induced cardiomyocyte hypertrophy in rat

  • Received:2016-08-21 Revised:2016-12-20 Online:2017-09-05 Published:2017-08-28

摘要: 目的: 探讨白藜芦醇(RES)对异丙肾上腺素(ISO)诱导的大鼠心肌细胞肥大的保护作用及对心肌肥大时内质网应激相关因子GRP78和GRP94表达的影响。方法: 建立ISO诱导大鼠心肌细胞肥大模型,将乳鼠心肌细胞分为正常对照组、异丙肾上腺素组(加入ISO 0.3μg/mL作用48 h),白藜芦醇干预组(RES 11.4μg/mL作用48 h)和白藜芦醇对照组。采用Leica 2Q500 图像分析系统检测心肌细胞表面积和心肌肥大标志基因心房钠尿肽(ANP)表达评价心肌细胞肥大程度,检测细胞培养液中乳酸脱氢酶(LDH)活性和丙二醛(MDA)含量; 实时定量PCR,检测ANP mRNA基因表达和Western blot分析GRP78和GRP94的蛋白表达。结果: 异丙肾上腺素注射液组与正常对照组比较,ISO作用心肌细胞48 h诱导心肌细胞肥大后,内质网应激相关因子GRP78和GRP94蛋白表达均增高(P<0.01,P<0.05),白藜芦醇干预组与异丙肾上腺素组比较,RES干预可以有效抑制ISO诱导的心肌细胞肥大(P<0.05),同时降低GRP78和GRP94的蛋白表达(P<0.05,P<0.01),减少细胞培养液中乳酸脱氢酶(LDH)和丙二醛(MDA)的释放(P<0.05)。结论:RES通过抑制心肌细胞内质网GRP78和GRP94表达,发挥对心肌肥大的保护作用。

关键词: 心肌肥大, 内质网应激, 白藜芦醇, GRP78, GRP94

Abstract: Objective: To explore the role of resveratrol (RES) on cardiomyocyte hypertrophy of rat induced by isoproternol (ISO) and the effect of Res on the expression of GRP78 and GRP94 in endoplasmic reticulum stress of cardiomyocyte hypertrophy. Methods: Hypertrophic model of cardiomyocytes was induced by ISO. Cardiomyocytes can be divided into four group: control group, the model group, RES+ISO group and RES group. Hypertrophy status of cardiomyocytes was determined by Leica 2Q500 image analysis system measuring the cell surface area and the gene expression of ANP. The content of LDH and MDA was measured in different groups, and the protein expressions of GRP78 and GRP94 were detected by Western blot. Results:Compared with control group, ISO induced cardiomyocytes hypertrophy, endoplasmic reticulum stress related factors GRP78 and GRP94 protein expression were increased, compared with ISO group, RES intervention could effectively suppress the cardiomyocytes hypertrophy induced by ISO, reduce the protein expression of GRP78 and GRP94, at the same time, reduce lactate dehydrogenase (LDH) and malondialdehyde (MDA) release in cell medium. Conclusion:The results suggest that treatment of RES may protect cardiomyocytes hypertrophy, which is partially mediated by inhibiting the expression of ERS factors GRP78 and GRP94 . .

Key words: cardiomyocyte hypertrophy, endoplasmic reticulum stress, resveratrol, GRP78, GRP94