基础医学与临床 ›› 2015, Vol. 35 ›› Issue (4): 518-522.

• 研究论文 • 上一篇    下一篇

厚朴酚减轻缺血大鼠心肌损伤

宋永辉   

  1. 黑龙江省大庆油田总医院儿科
  • 收稿日期:2014-06-30 修回日期:2015-01-06 出版日期:2015-04-05 发布日期:2015-04-08
  • 通讯作者: 宋永辉 E-mail:chuchundeyu1981@126.com

MagnoIoI relieves Ischemic Myocardial Injuries of Rats

yonghui song   

  • Received:2014-06-30 Revised:2015-01-06 Online:2015-04-05 Published:2015-04-08
  • Contact: yonghui song E-mail:chuchundeyu1981@126.com

摘要: 目的 研究厚朴酚(Mag)对大鼠缺血心肌的保护作用,及可能的机制。方法SD大鼠分为对照组、模型组和厚朴酚组。模型组采用结扎大鼠左冠状动脉前降支建立急性心肌梗死模型。Mag组建模型前预先30min给予高、中和低3种浓度的厚朴酚(40、20和10mg/kg)。酶联免疫法检测血清超氧化物歧化酶(SOD)活 力 和 丙 二 醛(MDA)含 量,DNA 断裂的原位末端标记法(,TUNEL)检测心肌细胞凋亡,Western blot法检测Bcl-2、caspase-3和Bax蛋白表达,激光共聚焦技术检测[Ca2+]i。结果 1)模型组LVEDP较对照组显著增加(P<0.05),LVSP及±dp/dtmax较对照组显著降低(P<0.05)。Mag组(40mg/kg) LVEDP较模型组显著降低(P<0.05),LVSP及±dp/dtmax较模型组显著增加(P<0.05)。2)模型组Bcl-2表达较对照组显著降低(P<0.05),30mmol/L KCl诱导的[Ca2+]i、Bax及caspase-3表达较对照组显著升高(P<0.05)。Mag组(40mg/kg)Bcl-2表达水平较模型组显著增加(P<0.05),30mmol/LKCl诱导的[Ca2+]i、Bax及caspase-3表达较模型组显著降低(P<0.05)。结论 厚朴酚减轻大鼠缺血心肌损伤可能与下调[Ca2+]i和抑制心肌细胞凋亡有关。

关键词: [关键词] 厚朴酚, 心肌缺血, Bcl-2, Bax, Caspase-3

Abstract: Objective The study was designed to explore the possible role of magnoIoI against myocardial ischemic damage and several related signaling pathways as potential mechanisms. Methods The protective properties of magnoIoI were studied in a rat model of acute myocardial infarction due to permanent ligation of the left anterior descending coronary artery. MDA content and SOD activity was measured by ELISA method,Apoptosis of cardiomyocytes was also observed by TUNEL staining.the expression of Bcl-2, Bax and caspase-3 were examined by Western blot.Intracellular calcium concentration [Ca2+]i was tested Laser scanning confocal microscopy. Results The results showed that administration of magnoIoI relieved myocardial injuries during ischemia, and this were achieved by protecting cardiomyocytes from apoptotic death. The beneficial effects of magnoIoI were likely mediated by activation of the survival signaling molecule (Bcl-2), and a reduction of apoptotic mediator (Bax, caspase-3) and intracellular Ca2+ overload. Conclusion the findings showed that administration of magnoIoI relieved myocardial injuries duringischemia, and this was achieved by protecting cardiomyocytes from apoptotic death.

Key words: KEY WORDS magnoIoI, myocardial ischemic, Bcl-2, Bax, Caspase-3