钾通道阻断剂对低氧/复氧诱导的培养海马神经元死亡的防护作用

被引:6
作者
陈明
孙红宇
王颖
高天明
机构
[1] 第一军医大学生理学教研室,第一军医大学生理学教研室,第一军医大学生理学教研室,第一军医大学生理学教研室广东广州,广东广州,广东广州,广东广州
基金
广东省自然科学基金;
关键词
海马; 神经元; 低氧; 复氧; 钾通道阻断剂;
D O I
暂无
中图分类号
R743.05 [];
学科分类号
1002 ;
摘要
目的研究钾通道阻断剂对单纯低氧/复氧诱导的培养海马神经元死亡的防护作用。方法培养8 d的海马神经元置于低氧环境(95% N2/5% CO2)6 h,复氧再培养直至72 h,复氧后0.5 h培养液内分别给予不同钾通道阻断剂,用细胞计数及MTT比色法检测神经元死亡情况。结果低氧/复氧诱导培养海马神经元出现迟发性死亡;四乙铵以剂量依赖性的方式防护低氧/复氧诱导的培养海马神经元免于死亡;大电导钙激活钾通道(BK通道)阻断剂iberiotoxin(IbTX)可完全消除低氧/复氧诱导的神经元死亡(P<0.001);A型钾通道阻断剂4-氨基吡啶不能防护低氧/复氧诱导的神经元免于死亡(P>0.05)。结论钾通道阻断剂四乙铵和IbTX能防护低氧/复氧诱导的培养海马神经元免于死亡,提示某些类型的钾通道尤其是BK通道活动增强可能参与了低氧/复氧诱导的培养海马神经元死亡。
引用
收藏
页码:872 / 874
页数:3
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