三重腦震蕩鼠認知行為障礙和膽堿乙酰轉移酶(ChAT)變化研究
發(fā)布時間:2019-05-31 19:13
【摘要】: 目的:建立三重腦震蕩(multiple cerebral concussion,MCC)大鼠模型,觀察MCC大鼠前額葉皮質、基底結、及中隔區(qū)的膽堿乙酰轉移酶(chol ine acetyltransferaseChAT)表達變化情況,探討三重腦震蕩大鼠認知功能障礙與相關腦區(qū)膽堿能神經元變化的關系,為運動性腦震蕩(sports-related cerebral concussi on,SRCC)的防治提供理論依據(jù)。方法:應用金屬單擺打擊裝置復制大鼠MCC模型58只,48只大鼠隨機分為1天、2天、4天、8天、16天和24天6個三重腦震蕩組(n=8),對照組(n=8),應用Western blotting實驗檢測大鼠傷后不同時間前額葉、基底節(jié)、中隔區(qū)的膽堿乙酰轉移酶(cholin acetyltransferase,CHAT)的變化。10只應用Morris水迷宮(MorrisWater Maze,MWM)于傷后1~15天連續(xù)14天檢測大鼠的空間學習記憶能力。結果:(1)水迷宮結果顯示:與對照組比較,MCC后1至15天大鼠在水迷宮測試中逃避尋找平臺的時間,即逃避潛伏期,明顯延長,尤其在傷后的第4、6、8、10至15天,與對照組相比,差異具有統(tǒng)計學意義(P≤0.05)。無平臺探測實驗中,MCC組大鼠在原有平臺象限(第三象限)停留時間明顯減少,而在第二象限停留時間明顯延長,與對照組相比,差異具有統(tǒng)計學意義(P≤0.01)。(2)Western blotting結果顯示:與對照組相比,大鼠三重腦震蕩后不同腦區(qū)膽堿乙酰轉移酶表達明顯下調,前額葉皮質在傷后2天、4天、8天、16天有差異,其中8天和16天有顯著差異(P<0.01);基底節(jié)在傷后2天、4天、8天、16天、24天有差異,其中4天、8天和l 6天有顯著差異(P<0.01);中隔區(qū)在傷后1天、2天、4天、8天、16天有差異,其中2天、4天、8天、16天有顯著差異(P<0.01)。結論:(1)單擺式閉合性機械打擊裝置成功建立MCC大鼠模型;(2)MCC大鼠存在明顯的空間學習和記憶能力障礙,且呈現(xiàn)遲發(fā)性損害現(xiàn)象;(3)腦震蕩大鼠中隔區(qū)、基底節(jié)、前額葉的ChAT活性表達有明顯變化。
[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,
本文編號: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,
本文編號:2489957
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