三重脑震荡鼠认知行为障碍和胆碱乙酰转移酶(ChAT)变化研究
发布时间:2019-05-31 19:13
【摘要】: 目的:建立三重脑震荡(multiple cerebral concussion,MCC)大鼠模型,观察MCC大鼠前额叶皮质、基底结、及中隔区的胆碱乙酰转移酶(chol ine acetyltransferaseChAT)表达变化情况,探讨三重脑震荡大鼠认知功能障碍与相关脑区胆碱能神经元变化的关系,为运动性脑震荡(sports-related cerebral concussi on,SRCC)的防治提供理论依据。方法:应用金属单摆打击装置复制大鼠MCC模型58只,48只大鼠随机分为1天、2天、4天、8天、16天和24天6个三重脑震荡组(n=8),对照组(n=8),应用Western blotting实验检测大鼠伤后不同时间前额叶、基底节、中隔区的胆碱乙酰转移酶(cholin acetyltransferase,CHAT)的变化。10只应用Morris水迷宫(MorrisWater Maze,MWM)于伤后1~15天连续14天检测大鼠的空间学习记忆能力。结果:(1)水迷宫结果显示:与对照组比较,MCC后1至15天大鼠在水迷宫测试中逃避寻找平台的时间,即逃避潜伏期,明显延长,尤其在伤后的第4、6、8、10至15天,与对照组相比,差异具有统计学意义(P≤0.05)。无平台探测实验中,MCC组大鼠在原有平台象限(第三象限)停留时间明显减少,而在第二象限停留时间明显延长,与对照组相比,差异具有统计学意义(P≤0.01)。(2)Western blotting结果显示:与对照组相比,大鼠三重脑震荡后不同脑区胆碱乙酰转移酶表达明显下调,前额叶皮质在伤后2天、4天、8天、16天有差异,其中8天和16天有显著差异(P<0.01);基底节在伤后2天、4天、8天、16天、24天有差异,其中4天、8天和l 6天有显著差异(P<0.01);中隔区在伤后1天、2天、4天、8天、16天有差异,其中2天、4天、8天、16天有显著差异(P<0.01)。结论:(1)单摆式闭合性机械打击装置成功建立MCC大鼠模型;(2)MCC大鼠存在明显的空间学习和记忆能力障碍,且呈现迟发性损害现象;(3)脑震荡大鼠中隔区、基底节、前额叶的ChAT活性表达有明显变化。
[Abstract]:Objective: to establish a rat model of triple concussion (multiple cerebral concussion,MCC and observe the expression of choline acetyltransferase (chol ine acetyltransferaseChAT) in prefrontalis cortex, basal node and septum of MCC rats. To investigate the relationship between cognitive impairment and cholinergic neurons in related brain regions in rats with triple concussion, and to provide theoretical basis for the prevention and treatment of motor concussion (sports-related cerebral concussi on,SRCC). Methods: 58 rats with MCC model were established by metal pendulum percussion device. 48 rats were randomly divided into 6 triple concussion groups (n 鈮,
本文编号:2489957
[Abstract]:Objective: to establish a rat model of triple concussion (multiple cerebral concussion,MCC and observe the expression of choline acetyltransferase (chol ine acetyltransferaseChAT) in prefrontalis cortex, basal node and septum of MCC rats. To investigate the relationship between cognitive impairment and cholinergic neurons in related brain regions in rats with triple concussion, and to provide theoretical basis for the prevention and treatment of motor concussion (sports-related cerebral concussi on,SRCC). Methods: 58 rats with MCC model were established by metal pendulum percussion device. 48 rats were randomly divided into 6 triple concussion groups (n 鈮,
本文编号:2489957
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