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中国临床药理学与治疗学 ›› 2003, Vol. 8 ›› Issue (5): 515-517.

• 研究原著 • 上一篇    下一篇

咪唑安定临床治疗浓度对海马神经元钠离子通道的作用

唐俊, 庄心良1, 李士通1, 焦志华1, 颜涛1   

  1. 上海华东医院麻醉科,上海 200040;
    1上海第一人民医院麻醉科,上海 200080
  • 收稿日期:2003-04-14 修回日期:2003-04-26 出版日期:2003-10-26 发布日期:2020-11-19
  • 通讯作者: 唐俊,男,博士,研究方向:麻醉药理学。Tel:021-62483180-81502 E-mail:jackt@netease.com
  • 作者简介:庄心良,男,教授,博士生导师。

Effects of midazolam in clinical therapeutic concentration on microscopic sodium current in hippocampal neurons

TANG Jun, ZHUANG Xin-LIang1, LI Shi-Tong1, JIAO Zhi-Hua1, YAN Tao1   

  1. Department of Anesthesiology,Shanghai Huadong Hospital,Shanghai 200040,China;
    1Department of Anesthesiology,Shanghai FirstPeople' s Hospital,Shanghai 200080,China
  • Received:2003-04-14 Revised:2003-04-26 Online:2003-10-26 Published:2020-11-19

摘要: 目的 采用大鼠海马神经元作为研究对象,研究咪唑安定对神经元钠离子通道的影响,以探讨其临床遗忘作用的可能机制。方法 在急性分离的大鼠海马锥体神经元上,利用全细胞膜片钳技术,记录钠离子通道的电流,研究咪唑安定对钠离子通道电流幅度和激活特性的影响。结果 咪唑安定对海马钠离子通道电流具有可逆性抑制作用,0.1 和10μmol·L-1的咪唑安定对钠离子通道分别抑制了(7.95±7.46)%和(25.37±8.31)%(P<0.01)。10μmol·L-1的咪唑安定还可使钠离子通道的激活曲线右移。结论 咪唑安定对海马神经元上的钠离子电流有较弱程度的抑制作用,但可能不是其主要的临床作用机制。

关键词: 药效学, 咪唑安定, 海马, 锥体神经元, 钠离子通道, 膜片钳

Abstract: AIM: To study the effects of midazolam on sodium channels of hippocampalPyramidal neurons,and to investigate mechanisms whereby midazolam mediates amnesia.METHODS: Sodium current was recorded by whole-cellPatch clamPtechnique in the acutely isolated neurons.Size of currents and steady activation curve were measured.RESULTS: Sodium channels were inhibited by midazolam in a reversibly manner.The sodiumPeak current was reduced by (7.95± 7.46)% and(25.37±8.31)%(P<0.01)at 0.1 and 10μmol·L-1of midazolam,respectively.The steady activation curve shifted right significantly caused by 10μmol·L-1midazolam.CONCLUSION: Midazolam inhibits sodium current slightly,suggesting that effects of midazolam on sodium channels are not the main mechanism in amnesia.

Key words: pharmacodynamics, midazolam, hippocampus, pyramidal neurons, sodium channels, patch clamp

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