脑纹状体边缘区注射岗田酸对大鼠逃避性长期记忆的影响
Chinese Journal of Behavioral Medicine and Brain Science(2005)
Abstract
目的观察大鼠纹状体边缘区注射蛋白磷酸酶1(protein phosphatase 1,PP1)抑制剂岗田酸(okadaic acid,OA)对大鼠逃避性长期记忆功能的影响.方法 SD成年大鼠,分为OA组(n=10)与盐水组(n=9),以Y迷宫训练作为强化学习的刺激,大鼠在Y迷宫训练第三次后立即进行双侧边缘区显微注射OA(0.5μl,40ng/μl)或等量生理盐水,并于一周后测试大鼠Y迷宫长期记忆.结果注药前OA组与盐水对照组动物第三次Y迷宫训练成绩分别为22.00±3.10和21.83±2.92无显著差异(P=0.923),但一周后OA注射组与盐水注射组动物的Y迷宫长期记忆测试成绩分别为24.71±2.21和20.00±3.46,OA注射组明显好于生理盐水注射组(P=0.013).结论训练后立即双侧纹状体边缘区内注射OA可增强实验大鼠在电Y迷宫中的逃避性长期记忆,提示PP1参与了边缘区相关的长期记忆.PP1抑制剂OA可增强大鼠纹状体边缘区相关的逃避性长期记忆.
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Key words
okadaic acid injection,striatum
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