法医学杂志 ›› 2012, Vol. 28 ›› Issue (3): 179-184.DOI: 10.3969/j.issn.1004-5619.2012.03.005

• 论著 • 上一篇    下一篇

大鼠急性心肌缺血后血管内皮生长因子的表达变化

毛瑞明1,杜中波1,高卫民1,米  丽1,朱宝利1,2   

  1. (1. 中国医科大学法医学院,辽宁 沈阳 110001; 2. 日本大阪市立大学医学部法医学教室,大阪 545-8585 日本)
  • 发布日期:2012-06-25 出版日期:2012-06-28
  • 通讯作者: 朱宝利,男,博士,教授,博士研究生导师,日本大阪市立大学医学部客座教授,主要从事法医病理学、法医病理生理学的教学、研究及鉴定工作;E-mail:zhu1127@hotmail.com
  • 作者简介:毛瑞明(1984—),男,满族,辽宁大连人,硕士研究生,主要从事法医病理学、法医病理生理学研究;E-mail:phransemrm@yahoo.com.cn
  • 基金资助:

    辽宁省教育厅科研基金资助项目(2009A766)

Time-Dependent Expression of Vascular Endothelial Growth Factor after Acute Myocardial Ischemia in Rats

MAO RUI-MING1, DU ZHONG-BO1, GAO WEI-MIN1, MI LI1, ZHU BAO-LI1,2   

  1. (1. School of Forensic Medicine, China Medical University, Shenyang 110001, China; 2. Department of Legal Medicine, Osaka City University Medical School, Osaka 545-8585, Japan)
  • Online:2012-06-25 Published:2012-06-28

摘要: 目的 观察大鼠缺血后心肌血管内皮生长因子(vascular endothelial growth factor,VEGF)免疫组织化学染色特点及其表达随时间的变化规律。 方法 结扎左冠状动脉前降支建立大鼠急性心肌缺血动物模型,应用免疫组织化学染色和Western印迹法检测大鼠心肌缺血后各时间段VEGF的表达及变化情况,同时监测大鼠的心电变化情况。 结果 正常对照组大鼠心肌未见VEGF表达;缺血15 min后于缺血区心肌细胞内发现VEGF的弱阳性表达;缺血3 h,VEGF表达达到高峰,主要分布于缺血区及其周边区;缺血6 h,VEGF的表达较3 h有所下降,仍处于较高水平。在试验过程中,通过心电监测发现9只大鼠发生室性心律失常而死亡。 结论 VEGF的免疫组织化学染色对确定急性心肌缺血的部位及严重程度可能有帮助作用,致死性心律失常可继发于心肌缺血。

关键词: 法医病理学, 心肌缺血, 血管内皮生长因子类, 大鼠

Abstract: Objective To investigate the immunohistochemical distributions and expressions of vascular endothelial growth factor(VEGF) in the model of rat myocardial ischemia. Methods The model of myocardial ischemia was established by ligating the left anterior descending(LAD) coronary artery of rats. The changes of VEGF expression were detected by immunohistochemistry and Western blot at time points after myocardial ischemia. The electrocardiographic changes were evaluated uninterruptedly. Results The expression of VEGF was not be found in control group. Fifteen minutes after LAD ligation, weak positive expression of VEGF were found in the ischemic myocardium. The expression of VEGF reached the peak at 3 hours after ligation. The VEGF distribution was mainly localized in the ischemic and peri-ischemic regions. Six hours after LAD ligation, the expression of VEGF decreased comparing with 3 hours and showed a relatively higher level. Fatal arrhythmia was found in nine rats by the electrocardiograph. Conclusion The immunohistochemical staining of VEGF could be helpful for investigating the location and severity of acute myocardial ischemia. Fatal arrhythmia may be secondary to myocardial ischemia.

Key words: forensic pathology, myocardial ischemia, vascular endothelial growth factors, rats

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