Consolidation, reconsolidation, and extinction of contextual fear memory depend on de novo protein synthesis in the locus coeruleus
Memory consolidation is the process underlying the stabilization of labile short-term memory and the generation of long-term memory for persistent memory storage. The retrieval of contextual fear memory induces two distinct and opposite memory processes: reconsolidation and extinction. Reconsolidati...
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| Format: | Article |
| Language: | English |
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Elsevier
2023-10-01
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| Series: | Brain Research Bulletin |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S0361923023001715 |
| _version_ | 1797677654818684928 |
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| author | Yu Arihara Yudai Fukuyama Satoshi Kida |
| author_facet | Yu Arihara Yudai Fukuyama Satoshi Kida |
| author_sort | Yu Arihara |
| collection | DOAJ |
| description | Memory consolidation is the process underlying the stabilization of labile short-term memory and the generation of long-term memory for persistent memory storage. The retrieval of contextual fear memory induces two distinct and opposite memory processes: reconsolidation and extinction. Reconsolidation re-stabilizes retrieved memory for re-storage, whereas memory extinction weakens fear memory and generates a new inhibitory memory. Importantly, the requirement for new gene expression is a critical biochemical feature of the consolidation, reconsolidation, and long-term extinction of memory. The locus coeruleus (LC) is a small nucleus in the brain stem that is composed predominantly of noradrenergic neurons that project to many brain regions. Recent studies have shown that the LC plays modulatory roles in the consolidation and extinction of auditory fear memory through its projections to brain regions contributing to memory storage. Here, we show that the LC is required for the consolidation, reconsolidation, and long-term extinction of contextual fear memory. We first observed that c-fos expression was induced in the LC following contextual fear conditioning to induce consolidation and following short and long re-exposure to the conditioning context to induce reconsolidation and long-term extinction, respectively. More importantly, inhibition of protein synthesis in the LC by a micro-infusion of anisomycin blocked the consolidation, reconsolidation, and long-term extinction of contextual fear memory. Our findings suggest that consolidation, reconsolidation, and long-term extinction occur in the LC and that the LC plays an essential role in memory storage and maintenance. |
| first_indexed | 2024-03-11T22:48:25Z |
| format | Article |
| id | doaj.art-127934327498446eb2644d176ed99de5 |
| institution | Directory Open Access Journal |
| issn | 1873-2747 |
| language | English |
| last_indexed | 2024-03-11T22:48:25Z |
| publishDate | 2023-10-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Brain Research Bulletin |
| spelling | doaj.art-127934327498446eb2644d176ed99de52023-09-22T04:37:57ZengElsevierBrain Research Bulletin1873-27472023-10-01202110746Consolidation, reconsolidation, and extinction of contextual fear memory depend on de novo protein synthesis in the locus coeruleusYu Arihara0Yudai Fukuyama1Satoshi Kida2:Department of Applied Biological Chemistry, Graduate school of Agriculture and Life Sciences, The University of Tokyo, Tokyo, Japan; Department of Bioscience, Faculty of Applied Bioscience, Tokyo University of Agriculture, Tokyo, Japan:Department of Applied Biological Chemistry, Graduate school of Agriculture and Life Sciences, The University of Tokyo, Tokyo, Japan; Research Fellow of Japan Society for the Promotion of Science, Tokyo, Japan:Department of Applied Biological Chemistry, Graduate school of Agriculture and Life Sciences, The University of Tokyo, Tokyo, Japan; Department of Bioscience, Faculty of Applied Bioscience, Tokyo University of Agriculture, Tokyo, Japan; Corresponding author at: Department of Applied Biological Chemistry, Graduate school of Agriculture and Life Sciences, The University of Tokyo, Tokyo, Japan.Memory consolidation is the process underlying the stabilization of labile short-term memory and the generation of long-term memory for persistent memory storage. The retrieval of contextual fear memory induces two distinct and opposite memory processes: reconsolidation and extinction. Reconsolidation re-stabilizes retrieved memory for re-storage, whereas memory extinction weakens fear memory and generates a new inhibitory memory. Importantly, the requirement for new gene expression is a critical biochemical feature of the consolidation, reconsolidation, and long-term extinction of memory. The locus coeruleus (LC) is a small nucleus in the brain stem that is composed predominantly of noradrenergic neurons that project to many brain regions. Recent studies have shown that the LC plays modulatory roles in the consolidation and extinction of auditory fear memory through its projections to brain regions contributing to memory storage. Here, we show that the LC is required for the consolidation, reconsolidation, and long-term extinction of contextual fear memory. We first observed that c-fos expression was induced in the LC following contextual fear conditioning to induce consolidation and following short and long re-exposure to the conditioning context to induce reconsolidation and long-term extinction, respectively. More importantly, inhibition of protein synthesis in the LC by a micro-infusion of anisomycin blocked the consolidation, reconsolidation, and long-term extinction of contextual fear memory. Our findings suggest that consolidation, reconsolidation, and long-term extinction occur in the LC and that the LC plays an essential role in memory storage and maintenance.http://www.sciencedirect.com/science/article/pii/S0361923023001715Locus coeruleusC-fosFear conditioningConsolidationReconsolidationExtinction |
| spellingShingle | Yu Arihara Yudai Fukuyama Satoshi Kida Consolidation, reconsolidation, and extinction of contextual fear memory depend on de novo protein synthesis in the locus coeruleus Brain Research Bulletin Locus coeruleus C-fos Fear conditioning Consolidation Reconsolidation Extinction |
| title | Consolidation, reconsolidation, and extinction of contextual fear memory depend on de novo protein synthesis in the locus coeruleus |
| title_full | Consolidation, reconsolidation, and extinction of contextual fear memory depend on de novo protein synthesis in the locus coeruleus |
| title_fullStr | Consolidation, reconsolidation, and extinction of contextual fear memory depend on de novo protein synthesis in the locus coeruleus |
| title_full_unstemmed | Consolidation, reconsolidation, and extinction of contextual fear memory depend on de novo protein synthesis in the locus coeruleus |
| title_short | Consolidation, reconsolidation, and extinction of contextual fear memory depend on de novo protein synthesis in the locus coeruleus |
| title_sort | consolidation reconsolidation and extinction of contextual fear memory depend on de novo protein synthesis in the locus coeruleus |
| topic | Locus coeruleus C-fos Fear conditioning Consolidation Reconsolidation Extinction |
| url | http://www.sciencedirect.com/science/article/pii/S0361923023001715 |
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