To investigate the effect of Er-xian decoction on ovariectomy induced-learning and memory disability in rats based on the differences in hippocampus proteomic expression, the female rats were ovariectomized for perimenopausal status and then randomly divided into 3 groups, namely sham group, control group and Er-xian decoction group. The rats in sham group and control group were given normal saline by gavage everyday, the rats in Er-xian decoction group were given 12 g·kg⁻¹ of Er-xian decoction by gavage once a day. After treatment for 90 day, all of the animals were tested by Morris water maze, and all of the samples were collected for testing. The hippocampus proteins were detected by Nano-LC-LTQ-Orbitrap system, and identified by Protein Discovery software. The intensity of differential proteins were quantitated by SIEVE software，and the biological functions of protein were analyzed by DIVAD database. The results showed that Er-xian decoction could significantly improve the abilities of learning and memory. Compared with control group， 216 differential proteins with a consistent variation trend with the sham group were found in the Er-xian decoction group. And they mainly concentrated in calcium signaling pathway, Rab3A and Rab14 were key genes with the highest functional classification enrichment score in the gene group. Er-xian decoction could significantly improve the abilities of learning and memory in perimenopausal model rats. The invention effect of Er-xian decoction may be correlated with the calcium signaling pathway and Ras-related protein Rab-3A, and Ras-related protein Rab-14.
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