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Multiple repressive mechanisms in the hippocampus during memory formation

Cited 76 time in Web of Science Cited 80 time in Scopus
Issue Date
2015-10
Citation
Science, Vol.350 No.6256, pp.82-87
Abstract
Memory stabilization after learning requires translational and transcriptional regulations in the brain, yet the temporal molecular changes that occur after learning have not been explored at the genomic scale. We used ribosome profiling and RNA sequencing to quantify the translational status and transcript levels in the mouse hippocampus after contextual fear conditioning. We revealed three types of repressive regulations: translational suppression of ribosomal protein-coding genes in the hippocampus, learning-induced early translational repression of specific genes, and late persistent suppression of a subset of genes via inhibition of estrogen receptor 1 (ESR1/ER alpha) signaling. In behavioral analyses, overexpressing Nrsn1, one of the newly identified genes undergoing rapid translational repression, or activating ESR1 in the hippocampus impaired memory formation. Collectively, this study unveils the yet-unappreciated importance of gene repression mechanisms for memory formation.
ISSN
0036-8075
URI
https://hdl.handle.net/10371/171898
DOI
https://doi.org/10.1126/science.aac7368
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College of Natural Sciences (자연과학대학)Dept. of Biological Sciences (생명과학부)Journal Papers (저널논문_생명과학부)
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