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中国临床药理学与治疗学 ›› 2005, Vol. 10 ›› Issue (8): 909-912.

• 研究原著 • 上一篇    下一篇

异氟醚预处理对大鼠脑缺血再灌注损伤细胞内游离钙的影响

刘艳红, 熊利泽1, 王强1, 张宏   

  1. 解放军总医院麻醉科, 北京 100853;
    1第四军医大学西京医院麻醉科, 西安 710032, 陕西
  • 收稿日期:2005-06-14 修回日期:2005-07-22 发布日期:2020-11-22
  • 通讯作者: 熊利泽,男,博士,教授,主任医师,硕士生导师,主要从事脑保护方面的研究。Tel:029-83374343 E-mail:lxiong@fmmu.edu.cn
  • 作者简介:刘艳红,女,博士研究生,主要从事神经损伤方面的研究。Tel:010-66937519 E-mail:liuyh79@263.net
  • 基金资助:
    国家自然科学基金项目(No30170907)

Effects of isoflurane pretreatment on changes of intracellular calcium in cerebral ischemic reperfusion injury in rats

LIU Yan-hong, XIONG Li-ze1, WANG Qiang1, ZHANG Hong   

  1. Department of Anesthesiology, Chinese PLA General Hospital, Beijing 100853, China;
    1Department of Anesthesiology, Xijing Hospital, Fourth Military Medical University, Xi'an 710032, Shaanxi, China
  • Received:2005-06-14 Revised:2005-07-22 Published:2020-11-22

摘要: 目的: 观察异氟醚对缺血再灌注大鼠活体脑片细胞内游离钙的影响,探讨异氟醚脑保护作用的机制。方法: 采用线栓法阻闭大鼠大脑中动脉造成局灶性脑缺血,并于缺血2h后拔出栓线给予再灌注。利用细胞内钙离子荧光探针Fluo-3AM在激光共聚焦显微镜下观察再灌注2h后大鼠脑片细胞内荧光强度。比较异氟醚预处理1h对缺血再灌注大鼠活体脑片额顶叶皮质及纹状体区域Ca2+浓度的影响。结果: 缺血再灌注损伤大鼠缺血侧脑片皮层及纹状体Ca2+荧光强度明显升高。脑缺血前给予异氟醚预处理1h可抑制缺血侧大脑皮层细胞内Ca2+含量的增加,对纹状体细胞内Ca2+含量的影响无统计学差异。结论: 缺血前给予异氟醚预处理可有效减轻额顶叶皮层细胞内的钙超载,对纹状体区域脑细胞内游离钙水平影响较小,提示异氟醚的脑保护作用在不同脑区存在差异。

关键词: 异氟醚, 预处理, 钙, 脑缺血, 激光共聚焦显微镜

Abstract: AIM: To investigate the changes of intracellular calcium concentration in vital brain slices after pretreatment with isoflurane in cerebral ischemic reperfusion rats.METHODS: Focal cerebral ischemia was induced by inserting a suture into the middle cerebral artery of rats.Reperfusion was accomplished by withdrawing the suture after 2 hours'ischemia.The changes of intracellular calcium in vital brain slices were determined by fluorescent Ca2+-indicator fluo-3 AM.The effects of isoflurane pretreatment were evaluated before cerebral ischemia on the intracellular calcium of cortex and striatum.RESULTS: Intracellular calcium concentration increased significantly both in the cortex and the striatum of the brain after cerebral ischemia reperfusion.Isoflurane pretreatment given before cerebral ischemia inhibited the elevation of Ca2+in the cortex but not in the striatum induced by ischemia reperfusion injury.CONCLUSION: Isoflurane can inhibit Ca2+overloading in cortex induced by cerebral ischemia reperfusion, which may be one of the mechanisms of isoflurane neuroprotection.

Key words: isoflurane, preconditioning, calcium, cerebral ischemia, laser confocal scanning microscope

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