东茛菪碱抗吗啡依赖作用与海马细胞内钙的关系
Zhongguo ying yong sheng li xue za zhi = Zhongguo yingyong shenglixue zazhi = Chinese journal of applied physiology（2006）
Abstract
目的:观察东莨菪碱(scopolamin,Sco)对吗啡(morphine,Mor)致小鼠依赖性作用的影响及其机制分析.方法:连续7 d腹腔内注射吗啡建立吗啡依赖小鼠模型;热板法测定痛阈;纳络酮(naloxone,Nal)催促实验计数小鼠跳跃次数和跳跃动物率;流式细胞术测量海马细胞内游离Ca2+([Ca2+]i)浓度.结果:吗啡依赖小鼠的痛阈明显下降,跳跃次数和跳跃动物率明显增加,海马[Ca2+]i明显增加.给予东莨菪碱(4mg·kg-1×7 d)后,吗啡依赖小鼠海马[Ca2+]i明显减少(P＜0.05),痛阈提高(P＜0.01),跳跃次数和跳跃动物率减少(P＜0.05).结论:东莨菪碱具有对抗吗啡依赖性的作用,其机制可能与降低脑细胞内游离Ca2+水平有关.
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Key words
hippocampus,pain threshold,nal-precipitated jumping response,scopolamin,intracellular calcium,morphine
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