Cited by 501Neuroscience and Neuropharmacology ResearchCellular transport and secretionMemory and Neural Mechanisms

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AMPA Receptor Incorporation into Synapses during LTP: The Role of Lateral Movement and Exocytosis

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Abstract

The regulated trafficking of AMPA receptors (AMPARs) to synapses is thought to underlie the enhanced transmission in long-term potentiation (LTP), a cellular model of memory. However, there is controversy regarding the nonsynaptic site, either on the surface or intracellularly, from which AMPARs move into synapses during LTP. Using recombinant surface-fluorescent receptors in organotypic rat hippocampal slices, we show that the majority of AMPARs incorporated into synapses during LTP is from lateral diffusion of spine surface receptors containing GluR1, an AMPAR subunit. Following synaptic potentiation, AMPARs in intracellular pools containing GluR1 are driven to the surface primarily on dendrites. These exocytosed receptors likely serve to replenish the local extrasynaptic pool available for subsequent bouts of plasticity. These results clarify the role of intracellular and surface AMPARs during synaptic plasticity.

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Crossref · 10.1016/j.neuron.2009.08.035

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Metadata

Authors
Makino, H., & Malinow, R.
Affiliations
Cold Spring Harbor Laboratory (US)
Corresponding author
Malinow, Roberto
Venue
Neuron
Publisher
Elsevier BV
Published
2009-11
Volume
64
Issue
3
Pages
381-390
ISSN
0896-6273 (ISSN-L)
OpenAlex
W2058113433
Cited by
501
References
41
Citations by year
2026: 16 · 2025: 18 · 2024: 20 · 2023: 12 · 2022: 22 · 2021: 38 · 2020: 39 · 2019: 27 · 2018: 34 · 2017: 35 · 2016: 26 · 2015: 22 · 2014: 41 · 2013: 52 · 2012: 38
FWCI
13.72
Type
journal article
Language
en
Open access
Locations
  • Neuron (publishedVersion)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
  • Cold Spring Harbor Laboratory Institutional Repository (Cold Spring Harbor Laboratory) (acceptedVersion)
Funders
  • National Institute on Aging (R01AG032132)
  • National Institute of Mental Health (R01MH049159, R37MH049159)
Topics
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neuropharmacology Research
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cell Biology › Cellular transport and secretion
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Memory and Neural Mechanisms
Keywords
AMPA receptors, long-term potentiation, receptor trafficking, synaptic plasticity, GluR1, lateral diffusion, exocytosis, hippocampus, memory
MeSH terms
Animals, Cell Membrane, Dendrites, Diffusion, Exocytosis, Fluorescence, Hippocampus, Neurons, Synapses, Video Recording, Long-Term Potentiation, Pyramidal Cells, Receptors, AMPA, Intracellular Space, Dendritic Spines, Rats, CA1 Region, Hippocampal, In Vitro Techniques

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