“脑功复得”改善脑老化的基础研究

Experimental study on the effect of Naogongfude on the aging of the rat brain

目的 研究中药合剂“脑功复得”口服液 (以下简称脑功复得 )对老龄大鼠学习记忆能力及大脑皮质海马突触泡膜素(Synaptophysin ,SY)、Tau 蛋白表达等的影响 ,探讨其延缓脑老化的功效及可能机制。方法 应用爬杆主动回避反应 (Activeavoidancereaction ,AAR)将动物分为学习记忆正常组和障碍组 ,再随机分别设置对照组 (普食 )和实验喂药组 (5ml/d ,2月 )。在此基础上进行AAR和多功能箱被动回避反应 (Passiveavoidancereaction ,PAR)训练、突触体计数、突触泡膜素和Tau蛋白免疫组化染色 (Immunocyto chemistry ,ICC)、凋亡细胞计数。结果 服用脑功复得 2月后 ,AAR习得率明显提高、消退明显延迟、步入潜伏期 (Stepthroughlatency ,STL)明显延长、大脑皮质海马突触体计数明显增高、突触泡膜素ICC染色增强、Tau蛋白ICC染色减弱、凋亡细胞减少。结论 通过动物实验说明从神经行为学和形态学指标看 。

Objective To evaluate the effect of Naogongfude (NGFD, a traditional Chinese medicine orally administrated) on learning and memory and the expressions of synaptophysin (SY) and Tau-protein in cerebral cortex and hippocampus in aged rats and to explore the possible mechanism. Methods Rats were divided into normal and neural disturbance groups according to the outcomes of active avoidance reaction (AAR) test, and then each group was randomly divided into control and NGFD-treated experimental groups. Animals were orally fed with NGFD for 2 months (5 ml/d) in experimental group or routinely fed in control and taken AAR and passive avoidance reaction (PAR) tests. After the rats were sacrificed, the synaptosome count, the expression of SY and Tau-protein, and the neuron apoptosis in cerebrum were examined. Results The rats after 2-month NGFD administration had an increased AAR acquisition, obviously delayed AAR extinction and prolonged step through latency (STL) of PAR. The number of synaptosomes was raised and the immunoreactive intensity of synaptophysin was increased remarkedly, while Tau-protein immunoreactivity and apoptotic cells were decreased in cerebrum. Conclusion NGFD does have the effect of improving brain function and putting off the aging of rat brain according to the results of behavior study and morphological observation.