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中国临床药理学与治疗学 ›› 2009, Vol. 14 ›› Issue (8): 900-905.

• 基础研究 • 上一篇    下一篇

短期禁食对大鼠心肌缺血再灌注心律失常及心肌能量代谢的影响

白霞1, 郭志宏2, 张璠1, 范书铎1   

  1. 1中国医科大学基础医学院生理学教研室,2沈阳市东方医疗集团, 沈阳 110001, 辽宁
  • 收稿日期:2009-06-18 修回日期:2009-08-09 出版日期:2009-08-26 发布日期:2020-10-30
  • 通讯作者: 范书铎, 女, 教授, 硕士研究生导师, 研究方向:心脏生理。Tel:024-23256666-5301 E-mail:liuzhangfan@126.com
  • 作者简介:白霞, 女, 硕士研究生, 讲师, 研究方向:心脏生理, 神经生理。Tel:13516000596 E-mail:baixiaspring @hotmail.com
  • 基金资助:
    辽宁省教育厅基金资助项目(051523)

Effects of short-term fasting on energy metabolism and arrhythmia after myocardial ischemia/reperfusion in rats

BAI Xia1, GUO Zhi-hong2, ZHANG Fan1, FAN Shu-duo1   

  1. 1Department of Physiology, College of Basic Medical Science, China Medical University, 2Shenyang Oriental Medical Production Co, Ltd, Shenyang 110001, Liaoling, China
  • Received:2009-06-18 Revised:2009-08-09 Online:2009-08-26 Published:2020-10-30

摘要: 目的: 观察短期禁食(STF) 对大鼠心肌缺血/再灌注(I/R) 心律失常及心肌能量代谢的影响。方法: 80 只 SD 大鼠, 随机分为对照组 、I/R组、STF 组、胺碘酮组、联合应用组 。采用结扎冠状动脉左前降支 30 min, 再灌注 120 min, 建立心肌 I/R 模 型。 监 测标 准 肢体 Ⅱ 导联 心 电图(ECG) , 记录缺血期间室性心律失常(VA) 的发生情况 。实验结束取心肌, 提取线粒体, 测定线粒体细胞色素氧化酶(COX) 及 H+-ATPase 活性, 采用HPLC 法测定心肌组织中高能磷酸化合物 ATP、ADP 和 AMP 的含量, 以试剂盒测定心肌组织Na+/K+-ATPase 、Ca2+/Mg2+ -ATPase 活 性, 观 察STF 对心肌的保护作用, 并与胺碘酮作比较。结果: 与 I/R 组比较, STF 组室性早搏(VPC) 出现时间明显推迟(P<0.01) , 持续时间明显缩短(P<0.01) , 室性心动过速(VT) 和心室纤颤(VF) 发生率都明显降低(P<0.05) ;I/R 组 COX 和 H+-AT-Pase 活性 、心肌腺苷酸含量、ATPase 的活性均显著降低(P<0.01) , STF 可使上述各种酶的活性及心肌腺苷酸的含量有所提高(P<0.01) 。以 STF 与胺碘酮联合应用对心肌的保护作用最为显著 。结论: STF 具有抗大鼠心肌 I/R心律失常的作用, 其机制可能与改善心肌组织的能量代谢有关。

关键词: 短期禁食, 缺血/再灌注, 心律失常, 能量代谢

Abstract: AIM: To observe the effects of short-term fasting (STF) on myocardial energy metabolism and arrhythmia after myocardial ischemia/reperfusion (I/R) in rats. METHODS: 80 SD ratswere randomly divided into 5 groups: normal control group, I/R group, STF group, amiodarone group, combination group (STF +amiodarone) .The I/R model of SD rats was established by deligation left anterior descending coronary artery 30 min, reperfusion 120 min .The stan-dard limbs Ⅱlead electrocardiogram (ECG) was moni-tered and the occurrence condition of ventricular arrhythmia (VA) was recorded. The activities of cyto-chrome-oxydase(COX) and H+-ATPase were detected, after the myocardial mitochondria was extracted .The high energy phosphates (ATP, ADP and AMP) levels in myocardium were measured by HPLC.The activities of Na+/K+ -ATPase and Ca2+/Mg2+ -ATPase in myo-cardium tissues were determined.The protection was observed to myocardium, and the resultswere compared with the protection in amiodarone group.RESULTS: Compared with I/Rgroup, the onset of ventricular pre-mature contraction (VPC) was delayed markedly (P< 0.01) , the duration of VPC was shorted (P<0.01) , the incidences of ventricular tachycardia (VT) and ventricular fibrillation (VF) were decreased (P<0.05) in STF group.The activities of COX, H+ -AT-Pase, Na+/K+ -ATPase, Ca2+/Mg2+-ATPase and the contents of myocardial adenine nucleotide were de-creased signifcantly in I/R group.STF could increase the levelsof COX, ATPase and myocardial adenine nu-cleotide contents (P<0.01) .The myocardial protec-tive effects of the combination group was the best . CONCLUSION: STF has antiarrhythmic effect in rats, the protective action is related to the improvement of energy metabolism .

Key words: short-term fasting, ischemia reperfu-sion, arrhythmia, energy metabolism

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