Cited by 775Neuroscience and Neuropharmacology ResearchMemory and Neural MechanismsNeurotransmitter Receptor Influence on Behavior

Postsynaptic receptor trafficking underlying a form of associative learning

Rumpel, Simon, LeDoux, Joseph, Zador, Anthony, Malinow, Roberto·2005·Science

Abstract

To elucidate molecular, cellular, and circuit changes that occur in the brain during learning, we investigated the role of a glutamate receptor subtype in fear conditioning. In this form of learning, animals associate two stimuli, such as a tone and a shock. Here we report that fear conditioning drives AMPA-type glutamate receptors into the synapse of a large fraction of postsynaptic neurons in the lateral amygdala, a brain structure essential for this learning process. Furthermore, memory was reduced if AMPA receptor synaptic incorporation was blocked in as few as 10 to 20% of lateral amygdala neurons. Thus, the encoding of memories in the lateral amygdala is mediated by AMPA receptor trafficking, is widely distributed, and displays little redundancy.

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Crossref · 10.1126/science.1103944

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  • DA signaling within the hippocampus serves to consolidate the association of a neutral context with aversive, unconditioned stimuli by contributing to the plasticity of the CA3-CA1 circuitry that likely contributes to memory retention.

    “Thus, DA signaling within the hippocampus serves to consolidate the association of a neutral context with aversive, unconditioned stimuli by contributing to the plasticity of the CA3-CA1 circuitry that likely contributes to memory retention (McHugh et al., 2007; Rumpel et al., 2005).”

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Authors
Rumpel, S., LeDoux, J., Zador, A., & Malinow, R.
Affiliations
Cold Spring Harbor Laboratory (US)
Corresponding author
Malinow, Roberto
Venue
Science
Published
2005-04
Volume
308
Issue
5718
Pages
83-88
ISSN
  • 0036-8075 (ISSN-L)
  • 1095-9203
OpenAlex
W1977313055
Cited by
775
References
53
Citations by year
2026: 14 · 2025: 25 · 2024: 25 · 2023: 16 · 2022: 18 · 2021: 34 · 2020: 25 · 2019: 34 · 2018: 41 · 2017: 39 · 2016: 38 · 2015: 44 · 2014: 42 · 2013: 61 · 2012: 31
FWCI
18.21
Type
journal article
Language
en
Open access
closed
Locations
  • Science (publishedVersion)
  • PubMed (publishedVersion)
  • Cold Spring Harbor Laboratory Institutional Repository (Cold Spring Harbor Laboratory) (acceptedVersion)
Topics
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neuropharmacology Research
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Memory and Neural Mechanisms
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neurotransmitter Receptor Influence on Behavior
Keywords
AMPA receptor trafficking, fear conditioning, associative learning, lateral amygdala, postsynaptic receptors, memory encoding, glutamate receptors, synaptic plasticity
MeSH terms
Amygdala, Animals, Association Learning, Conditioning, Psychological, Electrophysiology, Fear, Female, Genetic Vectors, Male, Memory, Neural Pathways, Synaptic Transmission, Neuronal Plasticity, Neurons, Recombinant Fusion Proteins, Synapses, Thalamus, Rats, Sprague-Dawley, Long-Term Potentiation, Receptors, AMPA, Simplexvirus, Patch-Clamp Techniques, Protein Transport, Green Fluorescent Proteins, Rats

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