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脑缺血后大鼠海马CA1区神经元持续钠电流变化的研究
Effect of cerebral ischemia on the persistent sodium current of rat CA1hippocampal neurons
【摘要】 目的研究脑缺血后大鼠海马CA1区神经元持续钠电流的变化,探讨钠通道阻滞剂对缺血脑组织保护的机理。方法酶消化法急性分离SD大鼠(10~14d)海马CA1区神经元,全细胞膜片钳技术记录脑缺血对持续钠电流的影响。结果缺血3 min时持续钠电流增加到正常时的1.59±0.26倍(P﹤0.05),缺血5 min时增加到正常时的2.92±0.46倍(P﹤0.05)。结论脑缺血时钠通道开放,持续钠电流增加。
【Abstract】 Objective To study the variations of persistent sodium current of CA1 hippocampal neurons following cerebral ischemia in rats. Methods Whole-cell patch-Clamp recordings were made from enzymatically isolated rat CA1 hippocampal neurons. Results3 min and 5 min after the cerebral ischemia occurs, the persistent sodium current increases to 1.59±0.26 times and 2.92±0.46 times respectively compared to the normal persistent sodium current (P<0.05) . Conclusion Persistent sodium current of rat CA1 hippocampal neurons increases on condition of cerebral ischemia.
【Key words】 cerebral ischemia; persistent sodium current; sodium channel; hippocampus; patch-clamp;
- 【文献出处】 中华神经医学杂志 ,Chinese Journal of Neuromedicine , 编辑部邮箱 ,2003年01期
- 【分类号】R363
- 【被引频次】2
- 【下载频次】108