鼠脑穹窿海马伞切断突触素动态变化及Morris水迷宫重复训练对其影响

目的在Morris水迷宫(MWM)重复训练的过程中观察穹窿海马伞切断大鼠的SYN动态变化探讨AD的发病机制和MWM重复训练学习和记忆能力对AD的影响,为临床应用提供实验依据。方法采用Wistar大鼠60只,随机分为对照组、模型组和实验组,建模后连续4周给予Morris水迷宫重复训练定位航行和探索训练,分别评定大鼠空间学习和记忆能力,后进行海马突触素(SYN)免疫组化染色和超微电镜观察并进行统计学处理。结果随着训练次数的增加,对照组、模型组、实验组逃逸时间均逐渐缩短,实验组短于模型组,长于对照组(P<0.05),差异有统计学意义,提示空间学习能力得到提高。对照组、模型组和实验组大鼠在靶象限活动时间(s)百分比差异没有统计学意义(P<0.05),提示空间记忆能力无明显提高。免疫组化结果显示实验组SYN表达高于模型组,弱于对照组。结论MWM重复训练增加海马SYN表达可能早提高穹窿海马伞切断大鼠空间学习能力的重要机制。

The dynamic changes of synaptophysin in fimbria-fornix transaction rat's brain and the effects of repeated MWM training

Objective To repeat the training in the MWM were observed during the fornix cut off the rats explore the dynamic changes of SYN in the pathogenesis of AD and the duplication of training MWM learning and memory ability of AD, in order to provide experimental basis for clinical applications.Methods Wistar rats were randomly divided into control group, model group and experimental group, modeling, four weeks later to repeat the training given to Morris water maze place navigation and exploration of training, w...