Cited by 159Memory and Neural MechanismsGenomics and Chromatin DynamicsEpigenetics and DNA Methylation

Mapping the epigenomic and transcriptomic interplay during memory formation and recall in the hippocampal engram ensemble

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Marco, Asaf, Meharena, Hiruy S., Dileep, Vishnu, Raju, Ravikiran M., Davila-Velderrain, Jose, Zhang, Amy Letao, Adaikkan, Chinnakkaruppan, Young, Jennie Z. +3 more·2020·Nature Neuroscience

Abstract

The epigenome and three-dimensional (3D) genomic architecture are emerging as key factors in the dynamic regulation of different transcriptional programs required for neuronal functions. In this study, we used an activity-dependent tagging system in mice to determine the epigenetic state, 3D genome architecture and transcriptional landscape of engram cells over the lifespan of memory formation and recall. Our findings reveal that memory encoding leads to an epigenetic priming event, marked by increased accessibility of enhancers without the corresponding transcriptional changes. Memory consolidation subsequently results in spatial reorganization of large chromatin segments and promoter-enhancer interactions. Finally, with reactivation, engram neurons use a subset of de novo long-range interactions, where primed enhancers are brought in contact with their respective promoters to upregulate genes involved in local protein translation in synaptic compartments. Collectively, our work elucidates the comprehensive transcriptional and epigenomic landscape across the lifespan of memory formation and recall in the hippocampal engram ensemble.

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Authors
Marco, A., Meharena, H. S., Dileep, V., Raju, R. M., Davila-Velderrain, J., Zhang, A. L., Adaikkan, C., Young, J. Z., Gao, F., Kellis, M., & Tsai, L.-H.
Affiliations
  • Massachusetts Institute of Technology (US)
  • Boston Children's Hospital (US)
  • Broad Institute (US)
Corresponding author
  • Marco, Asaf
  • Tsai, Li-Huei
Venue
Nature Neuroscience
Published
2020-10-05
Volume
23
Issue
12
Pages
1606-1617
ISSN
  • 1097-6256 (ISSN-L)
  • 1546-1726
OpenAlex
W3090072122
Cited by
159
References
68
Citations by year
2026: 23 · 2025: 31 · 2024: 30 · 2023: 22 · 2022: 32 · 2021: 19 · 2020: 2
FWCI
10.07
Type
journal article
Language
en
Open access
Locations
  • Nature Neuroscience (publishedVersion)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
  • DSpace@MIT (Massachusetts Institute of Technology) (submittedVersion, cc-by-nc)
Funders
  • Alzheimer's Association (AARF-19-618751)
  • JPB Foundation
  • Cure Alzheimer's Fund
  • Down Syndrome Research Foundation
  • National Institutes of Health (NIH T32, T32 grant)
  • National Institute on Aging (R01AG058002, R01AG062335, RF1AG054012, RF1AG062377, R01AG067151)
  • National Institute of Mental Health (U01MH119509, R01MH109978)
  • National Human Genome Research Institute (R01HG008155, U24HG009446)
  • National Institute of Neurological Disorders and Stroke (U01NS110453, R01NS102730, UG3NS115064)
  • Eunice Kennedy Shriver National Institute of Child Health and Human Development (T32HD098061)
Topics
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Memory and Neural Mechanisms
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Genomics and Chromatin Dynamics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Epigenetics and DNA Methylation
Keywords
memory formation, memory retrieval, epigenome, 3D genome organization, enhancer accessibility, enhancer-promoter interactions, long-range chromatin interactions, memory consolidation, memory reactivation, transcriptional regulation, mRNA translation
MeSH terms
Memory Consolidation, Animals, Brain Mapping, Hippocampus, Memory, Mice, Transgenic, Neurons, Mental Recall, Synapses, Up-Regulation, Mice, Epigenomics, Transcriptome

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