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Experience-dependent modification of a central amygdala fear circuit

Open access
Li, Haohong, Penzo, Mario A, Taniguchi, Hiroki, Kopec, Charles D, Huang, Z Josh, Li, Bo·2013·Nature Neuroscience

Abstract

The amygdala is essential for fear learning and expression. The central amygdala (CeA), once viewed as a passive relay between the amygdala complex and downstream fear effectors, has emerged as an active participant in fear conditioning. However, the mechanism by which CeA contributes to the learning and expression of fear is unclear. We found that fear conditioning in mice induced robust plasticity of excitatory synapses onto inhibitory neurons in the lateral subdivision of the CeA (CeL). This experience-dependent plasticity was cell specific, bidirectional and expressed presynaptically by inputs from the lateral amygdala. In particular, preventing synaptic potentiation onto somatostatin-positive neurons impaired fear memory formation. Furthermore, activation of these neurons was necessary for fear memory recall and was sufficient to drive fear responses. Our findings support a model in which fear conditioning-induced synaptic modifications in CeL favor the activation of somatostatin-positive neurons, which inhibit CeL output, thereby disinhibiting the medial subdivision of CeA and releasing fear expression.

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  • In the CeA microcircuit, glutamatergic signals from the BLA are conducted onward to the CeL, where they impinge on two populations of mutually inhibitory GABAergic neurons, the PKCδ-negative CeLON cells and the PKCδ-positive CeLOFF cells.

    “In this circuit, glutamatergic signals from the BLA are conducted onward to the CeL, where they impinge on two populations of mutually inhibitory GABAergic neurons, the protein kinase C-δ (PKCδ)-negative CeLON cells and the PKCδ-positive CeLOFF cells72,75.”

    From Resolving the neural circuits of anxiety (2015) · cites this paper as [75]

  • Activation of somatostatin-positive CeL neurons by the lateral amygdala and paraventricular nucleus of the thalamus drives fear learning through an overall increase in inhibition in the CeL.

    “Activation of somatostatin (SOM)-positive CeL neurons by the lateral amygdala75 and paraventricular nucleus of the thalamus76,77 has also been shown to drive fear learning through an overall increase in inhibition in the CeL.”

    From Resolving the neural circuits of anxiety (2015) · cites this paper as [75]

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Authors
Li, H., Penzo, M. A., Taniguchi, H., Kopec, C. D., Huang, Z. J., & Li, B.
Affiliations
  • Cold Spring Harbor Laboratory (US)
  • Princeton University (US)
Corresponding author
Li, Bo
Venue
Nature Neuroscience
Published
2013-01-27
Volume
16
Issue
3
Pages
332-339
ISSN
  • 1097-6256 (ISSN-L)
  • 1546-1726
OpenAlex
W2003870213
Cited by
497
References
49
Citations by year
2026: 15 · 2025: 25 · 2024: 49 · 2023: 35 · 2022: 42 · 2021: 46 · 2020: 50 · 2019: 40 · 2018: 49 · 2017: 33 · 2016: 34 · 2015: 43 · 2014: 23 · 2013: 13
FWCI
20.58
Type
journal article
Language
en
Open access
Locations
  • Nature Neuroscience (publishedVersion)
  • PubMed (publishedVersion)
  • Europe PMC (PubMed Central) (acceptedVersion)
  • PubMed Central (acceptedVersion)
  • Cold Spring Harbor Laboratory Institutional Repository (Cold Spring Harbor Laboratory) (acceptedVersion)
Funders
National Institute of Mental Health (U01MH078844, R01MH091903)
Topics
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Memory and Neural Mechanisms
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neuropharmacology Research
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neurobiology and Insect Physiology Research
Keywords
central amygdala, fear conditioning, fear memory, inhibitory interneurons, synaptic potentiation, experience-dependent plasticity, lateral amygdala, disinhibition, fear expression
MeSH terms
Amygdala, Animals, Conditioning, Psychological, Fear, Nerve Net, Neuronal Plasticity, Neurons, Somatostatin, Synapses, Mice

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