Cited by 186Memory and Neural MechanismsNeuroscience and Neuropharmacology ResearchNeurotransmitter Receptor Influence on Behavior

Early consolidation of instrumental learning requires protein synthesis in the nucleus accumbens

Hernandez, Pepe J., Sadeghian, Kenneth, Kelley, Ann E.·2002·Nature Neuroscience

Abstract

It is widely held that long-term memories are established by consolidation of newly acquired information into stable neural representations, a process that requires protein synthesis and synaptic plasticity. Plasticity within the nucleus accumbens (NAc), a major component of the ventral striatum, is thought to mediate instrumental learning processes and many aspects of drug addiction. Here we show that the inhibition of protein synthesis within the NAc disrupts consolidation of an appetitive instrumental learning task (lever-pressing for food) in rats. Post-trial infusions of anisomycin immediately after the first several training sessions prevented consolidation, whereas infusions delayed by 2 or 4 hours had no effect. However, if the rats were allowed to learn the task, the behavior was not sensitive to disruption by intra-accumbens anisomycin. Control infusions into the medial NAc shell or the dorsolateral striatum did not impair learning; in fact, an enhancement was observed in the latter case. These results show that de novo protein synthesis within the NAc is necessary for the consolidation, but not reconsolidation, of appetitive instrumental memories.

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Crossref · 10.1038/nn973

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Authors
Hernandez, P. J., Sadeghian, K., & Kelley, A. E.
Affiliations
University of Wisconsin–Madison (US)
Corresponding author
Hernandez, Pepe J.
Venue
Nature Neuroscience
Published
2002-11-11
Volume
5
Issue
12
Pages
1327-1331
ISSN
  • 1097-6256 (ISSN-L)
  • 1546-1726
OpenAlex
W2040297259
Cited by
186
References
41
Citations by year
2026: 1 · 2025: 3 · 2024: 3 · 2023: 2 · 2022: 5 · 2021: 2 · 2020: 3 · 2019: 8 · 2018: 6 · 2017: 8 · 2016: 7 · 2015: 5 · 2014: 10 · 2013: 9 · 2012: 13
FWCI
5.36
Type
journal article
Language
en
Open access
closed
Locations
  • Nature Neuroscience (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Institute on Drug Abuse (DA-04788)
  • National Institute of General Medical Sciences (GM 07507, T32GM007507)
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 › Neurotransmitter Receptor Influence on Behavior
Keywords
memory consolidation, protein synthesis, nucleus accumbens, operant conditioning, appetitive learning, anisomycin, synaptic plasticity, ventral striatum, dorsolateral striatum, memory reconsolidation, drug addiction
MeSH terms
Animals, Anisomycin, Dose-Response Relationship, Drug, Learning, Male, Memory, Nerve Tissue Proteins, Neural Pathways, Neuronal Plasticity, Neurons, Nucleus Accumbens, Protein Synthesis Inhibitors, Psychomotor Performance, Neostriatum, Rats, Sprague-Dawley, Rats

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