Follistatin mediates learning and synaptic plasticity via regulation of Asic4 expression in the hippocampus

Author:

Chen Yu-JuORCID,Deng Shin-MengORCID,Chen Hui-Wen,Tsao Chi-Hui,Chen Wei-Ting,Cheng Sin-Jhong,Huang Hsien-SungORCID,Tan Bertrand Chin-Ming,Matzuk Martin M.ORCID,Flint Jonathan,Huang Guo-JenORCID

Abstract

The biological mechanisms underpinning learning are unclear. Mounting evidence has suggested that adult hippocampal neurogenesis is involved although a causal relationship has not been well defined. Here, using high-resolution genetic mapping of adult neurogenesis, combined with sequencing information, we identify follistatin (Fst) and demonstrate its involvement in learning and adult neurogenesis. We confirmed that brain-specificFstknockout (KO) mice exhibited decreased hippocampal neurogenesis and demonstrated that FST is critical for learning.FstKO mice exhibit deficits in spatial learning, working memory, and long-term potentiation (LTP). In contrast, hippocampal overexpression ofFstin KO mice reversed these impairments. By utilizing RNA sequencing and chromatin immunoprecipitation, we identifiedAsic4as a target gene regulated by FST and show thatAsic4plays a critical role in learning deficits caused byFstdeletion. Long-term overexpression of hippocampalFstin C57BL/6 wild-type mice alleviates age-related decline in cognition, neurogenesis, and LTP. Collectively, our study reveals the functions for FST in adult neurogenesis and learning behaviors.

Funder

Chang Gung Memorial Hospital, Linkou

Ministry of Science and Technology, Taiwan

Publisher

Proceedings of the National Academy of Sciences

Subject

Multidisciplinary

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