Neuroprotective Effects of Tongmai Yizhi Decoction(通脉益智汤)against Alzheimer's Disease through Attenuating Cyclin-Dependent Kinase-5 Expression

作     者：FENG Jing-han CAI Bao-chang GUO Wei-feng WANG Ming-yan MA Yong LU Qiao-xi 

作者机构：The First Clinical Medical CollegeNanjing University of Chinese MedicineNanjing210023China Pharmacy CollegeNanjing University of Chinese MedicineNanjing210023China Basic Medical CollegeNanjing University of Chinese MedicineNanjing210023China 

出 版 物：《Chinese Journal of Integrative Medicine》 (中国结合医学杂志（英文版）)

年 卷 期：2017年第23卷第2期

页      面：132-137页

核心收录：

学科分类：1007[医学-药学(可授医学、理学学位)] 1006[医学-中西医结合] 1005[医学-中医学] 1002[医学-临床医学] 100602[医学-中西医结合临床] 10[医学] 

主　　题：Alzheimer's disease cyclin dependent kinase 5 Tongmai Yizhi Decoction Chinese medicine 

摘      要：Objectives： To explore the protective effects of Tongmai Yizhi Decoction（通脉益智汤, TYD）, a Chinese herb complex prescription against the impairment of cognitive functions and memory loss in amyloid beta 1–40（Aβ1-40） peptide and ibotenic（IBO）-induced Alzheimer＇s disease（AD） model rats. Methods： The in vivo model was established by injecting Aβ1-40 and IBO into left hippocampal CA1 area of Sprague-Dawley（SD） rat to mimic AD. Totally 32 SD rats were divided into 4 groups, including sham operation group, AD model group, TYD group [AD rats treated with TYD at the dosage of 19.44 g/（kg·d） for 4 weeks] and huperzine A group [AD rats treated with huperzine A at the dosage of 40.5 μg/（kg·d） for 4 weeks]. Spatial learning and memory level was detected by Morris Water Maze test. Histological morphology in the hippocampus was tested by hematoxylin-eosin（HE） staining. Cyclin-dependent kinase-5（Cdk5） protein and gene expression level were investigated by Western blot analysis and real-time quantitative polymerase chain reaction（RT-q PCR）, respectively. Results： Aβ1-40 and IBO treatment induced longer escape latency of rats, compared with sham operation group from day 25（P〈0.01）. However, TYD and huperzine A obviously shortened the escape latency from day 26（P〈0.01）. Moreover, the effect of TYD was similar to huperzine A（P〉0.05）. Furthermore, HE staining also showed that TYD and huperzine A reversed the neuropathological changes in the hippocampus triggered by Aβ1-40 and IBO. TYD and huperzine A effectively reduced the expression levels of Cdk5 protein and gene located in rat hippocampus, compared with the AD model group（P〈0.01）. Conclusion： TYD could be a promising neuroprotective agent for protecting neuron from AD injury through inhibiting Cdk5 expression.