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作 者:杨晓波[1] 卜吉梅[1] 王子高[1] 邬军锋[1] 张建峰[1] 姚恺[1] 祖衡兵[1]
机构地区:[1]复旦大学附属金山医院神经内科,上海200540
出 处:《中华老年医学杂志》2013年第5期558-560,共3页Chinese Journal of Geriatrics
基 金:金山区科学技术创新基金项目(2006-3-02)
摘 要:目的 观察去氢表雄酮干预对老年大鼠记忆相关脑区(额叶、颞叶、海马)胆碱能系统功能活性以及大鼠学习记忆行为的影响. 方法 24月龄雄性SD大鼠40只,随机分为对照组、溶剂组、小剂量去氢表雄酮(1.0 mg/kg)组、大剂量去氢表雄酮(5.0 mg/kg)组,隔日腹腔注射干预1个月,通过酶联免疫吸附(ELISA)技术分别检测各组大鼠额叶、颞叶、海马区的乙酰胆碱转移酶(ChAT)、胆碱酯酶(AchE)、乙酰胆碱(Ach)活性变化,并通过Morris水迷宫测定大鼠的学习记忆行为的变化. 结果 与对照组相比(ChAT活性:额叶118.5±1.3,颞叶120.6±1.5,海马130.8±1.5;AchE活性:额叶0.5±0.0,颞叶0.4±0.0,海马0.5±0.0;Ach活性:额叶26.0±0.8,颞叶24.5±1.4,海马30.1±0.8),小剂量去氢表雄酮干预组大鼠额叶、颞叶、海马区ChAT活性均明显增加、AchE活性明显下降、Ach含量明显升高(P<0.05);且去氢表雄酮大剂量干预组较小剂量干预组ChAT活性增加、AchE活性下降、Ach含量升高(P<0.05).而溶剂组大鼠额叶、颞叶、海马区的ChAT、AchE、Ach无明显变化(P>0.05).去氢表雄酮处理组大鼠每日逃避潜伏时间与对照组比较缩短(P<0.05、P<0.01),去氢表雄酮大剂量干预组较小剂量干预组每日逃避潜伏时间缩短(P<0.05). 结论 去氢表雄酮干预可以提高老年大鼠脑内的胆碱能系统功能活性,改善其学习记忆.Objective To explore the effects of dehydroepiandrosterone (DHEA) on learning and memory ability and activities of choline acetyltransferase (ChAT),acetylcholinesterase (AchE),acetylcholine (Ach) in the frontal,temporal,hippocampal area of the aged rat.Methods Forty 24-month-old male SD rats were randomly divided into 4 groups (n=10,each group):control group,solvent group (intraperitoneal injection with equal volumes of DMSO),low-dose group (intraperitoneal injection with equal volumes of DHEA,1 mg/kg),and high-dose group (intraperitoneal injection with equal volumes of DHEA,5 mg/kg).The activities of ChAT,AchE,and Ach were measured by enzyme linked immunosorbent assay (ELISA) method.Learning and memory ability was detected by Morris water maze test.Results The levels of ChAT in frontal,temporal and hippocampal area were (118.5±1.3) U/mg,(120.6±1.5) U/mg,(130.8±1.5) U/mg,respectively in control group,(i39.5±1.6) U/mg,(137.4±1.4) U/mg,(141.46±1.9) U/mg,respectively in high-dose group,(131.8±1.9) U/mg,(132.4±1.2) U/mg,(139.9±1.3) U/mg,respectively in low-dose group.The levels of AchE in frontal,temporal and hippocampal area were (0.5±0.0) U/mg,(0.4±0.0) U/mg,(0.5±0.0) U/mg,respectively in control group,(0.4±0.0) U/mg,(0.4±0.0) U/mg,(0.4±0.0) U/mg,respectively in high-dose group,and (0.4±0.0) U/mg,(0.4±0.0) U/mg,(0.4±0.0) U/mg,respectively in low-dose group,and (0.5±0.0)U/mg.The Ach levels in frontal,temporal and hippocampal area were (26.0±0.8) U/mg,(24.5±1.4) U/mg,(30.1±0.8) U/mg respectively in control group,(28.7±0.9) U/mg,(28.9±1.3) U/mg,(35.9±1.4) U/mg,respectively in high-dose group,and (27.6±0.1) U/mg,(28.0±1.1) U/mg,(34.2± 1.0) U/mg,rcspectively in low dose group.The activities of ChAT in frontal,temporal and hippocampal area were higher in DHEA treatment group than in control group (P〈0.05).The activities of AchE in frontal,t
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