姜黄素对东茛菪碱所致小鼠记忆功能障碍的影响

摘要

AIM:Scopolamine blocks cholinergic transmission and impairs learning and memory in mice．The purpose of this study was to evaluate the memory-improving properties of curcumin on scopolamine-induced memory im-pairment in mice．METHODS：The mice of memory impairment were induced by scopolamine．Step down test and Morris water maze test were used to observe the earning and memory ability in curcumin-treated ice．Biochemical assessments of AChE，MDA，and GSH-Px levels in brains were performed．RESULTS：Oral administration of curcumin ignificantly reduced the numbers of step-down rrors(P<0．05)and prolonged the step-down latency induced by scopolamine(P<0．05)．The escape latency time in mice treated with curcumin Was remarkably educed compared to that in scopolamine group by Morris water maze test(P<0．05)．After the platform was removed，the total time that the mice swam in the tar-get quadrant Was also longer in curcumin group than that in model group(P<0．05)．The data also indicated that curcumin significantly inhibited AChE ctivity(P<0．01)and prevented oxidative stress characterized by the significant reduction in MDA content and the significant increase in GSH-Px activities in the brain(P<0．01)．CONCLUSl0N：Curcumin in-duces cognitive improvement by enhancing the function of cholinergic system and its antioxidant activity．%目的:探讨中药单体姜黄素对东茛菪碱致小鼠记忆障碍的影响及其可能的机制.方法:用东莨菪碱建立昆明小鼠记忆获得性障碍模型,通过跳台和水迷宫实验观察姜黄素对小鼠学习记忆能力的影响,同时测定其脑组织中乙酰胆碱酯酶、谷胱甘肽过氧化物酶和丙二醛的活性.结果:姜黄素可以减少东莨菪碱所致的记忆获得性障碍小鼠跳台回避反应的错误次数(P<0.05),延长其逃避潜伏期(P<0.05),也可以缩短记忆获得障碍小鼠水迷宫中寻找平台的潜伏期(P<0.05),撤去平台后可以延长小鼠在原平台象限的停留时间(P<0.05).姜黄素可以降低小鼠脑乙酰胆碱酯酶活性(P<0.01)、提高抗氧化酶谷胱甘肽过氧化物酶活性(P<0.01)、降低脂质过氧化产物丙二醛含量(P<0.01).结论:姜黄素对记忆获得性障碍有明显的改善作用,其机制可能与影响中枢胆碱能系统、抗氧化损伤有关.