行为训练对胎儿生长受限子鼠学习记忆能力及海马NR2B、GluR1表达的影响

目的 探讨行为训练对胎儿生长受限(FGR)子鼠学习记忆能力及海马符氨酸受体NR2B和GluR1表达的影响.方法 被动吸烟法建立大鼠FGR模型,将子鼠分为FGR组及正常组,两组再各自随机分为训练组和非训练组,于生后2、4月行Morris水迷宫行为训练,应用避暗实验和跳台实验检测学习记忆能力,采用免疫组织化学法观察海马脑区谷氨酸受体NR2B及GluR1的表达情况.结果 学习记忆成绩比较,FGR组差于正常组,训练组优于非训练组;FGR训练组学习成绩提高明显,模型因素及训练凶素有交互效应(P<0.05);NR2B、GluR1在海马CA1区、CA3区的表达比较,FGR组低于正常组;训练组CA1区GluR1、NR2B的表达量明显高于非训练组;2月龄CA1区GluR1的表达,模型因素及训练因素有交互效应(p<0.05).结论 行为训练可提高FGR子鼠学习记忆能力,可能与海马CA1区谷氨酸受体NR2B、GluR1的表达上调有关.

Effect of behavioral training on learning and memory capacity and changes of hippocampal NR2B and GluR1 expressions in FGR offspring rats

Objective To study the effect of behavioral training on the learning and memory abilities and changes of NR2B and GluR1 expressions in the hippocampus of offspring rats with fetal growth retardation (FGR).Methods A FGR model was established in SD rats by passive smoking.The offspring rats were divided into FGR group and control group,each then randomized into training and untrained group.Morris water maze behavioral training was carried out in postnatal months 2 and 4,and the learning and memory abilities o...