Cited by 289Memory and Neural MechanismsNeuroscience and Neuropharmacology ResearchMemory Processes and Influences

Encoding of contextual fear memory in hippocampal–amygdala circuit

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Kim, Woong Bin, Cho, Jun-Hyeong·2020·Nature Communications

Abstract

In contextual fear conditioning, experimental subjects learn to associate a neutral context with an aversive stimulus and display fear responses to a context that predicts danger. Although the hippocampal–amygdala pathway has been implicated in the retrieval of contextual fear memory, the mechanism by which fear memory is encoded in this circuit has not been investigated. Here, we show that activity in the ventral CA1 (vCA1) hippocampal projections to the basal amygdala (BA), paired with aversive stimuli, contributes to encoding conditioned fear memory. Contextual fear conditioning induced selective strengthening of a subset of vCA1–BA synapses, which was prevented under anisomycin-induced retrograde amnesia. Moreover, a subpopulation of BA neurons receives stronger monosynaptic inputs from context-responding vCA1 neurons, whose activity was required for contextual fear learning and synaptic potentiation in the vCA1–BA pathway. Our study suggests that synaptic strengthening of vCA1 inputs conveying contextual information to a subset of BA neurons contributes to encoding adaptive fear memory for the threat-predictive context.

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Authors
Kim, W. B., & Cho, J.-H.
Affiliations
University of California, Riverside (US)
Corresponding author
Cho, Jun-Hyeong
Venue
Nature Communications
Published
2020-03-13
Volume
11
Issue
1
Pages
1382-1382
ISSN
2041-1723 (ISSN-L)
OpenAlex
W3012431228
Cited by
289
References
51
Citations by year
2026: 29 · 2025: 50 · 2024: 52 · 2023: 62 · 2022: 49 · 2021: 41 · 2020: 6
FWCI
21.36
Type
journal article
Language
en
Open access
Locations
  • Nature Communications (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • RePEc: Research Papers in Economics (submittedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
  • eScholarship (California Digital Library) (submittedVersion)
  • eScholarship (California Digital Library) (submittedVersion, cc-by)
Funders
  • U.S. Department of Health & Human Services | NIH | National Institute of Mental Health (R01MH118339, R56MH113894)
  • UC | UC Riverside | Academic Senate, University of California, Riverside (Initial Complement Funds)
Topics
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Memory and Neural Mechanisms
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neuropharmacology Research
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Memory Processes and Influences
Keywords
contextual fear memory, ventral CA1, basal amygdala, synaptic potentiation, monosynaptic connections, aversive stimuli, threat prediction
MeSH terms
Amnesia, Amygdala, Animals, Avoidance Learning, Behavior, Animal, Disease Models, Animal, Fear, Hippocampus, Learning, Memory, Mice, Inbred C57BL, Neural Pathways, Neuronal Plasticity, Neurons, Synapses, Mice, Knockout, CA1 Region, Hippocampal, Basolateral Nuclear Complex

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