Cited by 31Neuroscience and Neuropharmacology ResearchMemory and Neural MechanismsGenetics and Neurodevelopmental Disorders

The role of AMPAR lateral diffusion in memory

Open access
Choquet, Daniel, Opazo, Patricio·2022·Seminars in Cell & Developmental Biology

Abstract

The accumulation of AMPARs to synapses is a fundamental step in Long-term potentiation (LTP) of synaptic transmission, a well-established cellular correlate of learning and memory. The discovery of a sizeable and highly mobile population of extrasynaptic AMPARs - randomly scanning the synaptic surface under basal conditions - provided a conceptual framework for a simplified model: LTP can be induced by the capture, and hence accumulation, of laterally diffusing extrasynaptic AMPARs. Here, we review the evidence supporting a rate-limiting role of AMPAR lateral diffusion in LTP and as consequence, in learning and memory. We propose that there are "multiple solutions" for achieving the diffusional trapping of AMPAR during LTP, mainly mediated by the interaction between interchangeable AMPAR auxiliary subunits and cell-adhesion molecules containing PDZ-binding domains and synaptic scaffolds containing PDZ-domains. We believe that this molecular degeneracy in the diffusional trapping of AMPAR during LTP serve to ensure the robustness of this crucial step in the making of memories. All in all, the role of AMPAR lateral diffusion in LTP is not only a conceptual leap in our understanding of memory, but it might also hold the keys for the development of therapeutics against disorders associated with memory deficits such as Alzheimer's disease.

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Crossref · 10.1016/j.semcdb.2022.01.009

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18 of 18 references verified0 citation errors · 0 not checkable

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Each is checked against this paper’s own text: does it say what the citing paper says it does?

  • Digestion of HA with hyaluronidase modulates synaptic function by increasing AMPA receptor mobility and surface expression of NMDA receptors.

    “Digestion of HA with hyaluronidase modulates synaptic function by increasing AMPA receptor mobility (reviewed in [50] and surface expression of NMDA receptors [35, 51].”

    From The extracellular matrix and perineuronal nets in memory (2022) · cites this paper as [50]

  • Interfering with the surface diffusion of AMPARs by receptor cross-linking markedly impairs LTP.

    “Consistent with this result is the finding that interfering with the surface diffusion of AMPARs by receptor cross-linking markedly impairs LTP (345–347).”

    From Synaptic memory and CaMKII (2023) · cites this paper as [347]

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Authors
Choquet, D., & Opazo, P.
Affiliations
  • Centre National de la Recherche Scientifique (FR)
  • The University of Queensland (AU)
Corresponding author
  • Choquet, Daniel
  • Opazo, Patricio
Venue
Seminars in Cell & Developmental Biology
Publisher
Elsevier BV
Published
2022-05
Volume
125
Pages
76-83
ISSN
1084-9521 (ISSN-L)
OpenAlex
W4210270532
Cited by
31
References
18
Citations by year
2026: 8 · 2025: 8 · 2024: 7 · 2023: 6 · 2022: 2
FWCI
0.82
Type
journal article
Language
en
Open access
Locations
  • Seminars in Cell and Developmental Biology (acceptedVersion)
  • PubMed (publishedVersion)
Topics
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neuropharmacology Research
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Memory and Neural Mechanisms
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Genetics and Neurodevelopmental Disorders
Keywords
AMPA receptors, lateral diffusion, long-term potentiation, synaptic plasticity, learning and memory, PDZ-binding domain, adhesion molecules, synaptic scaffolds, Alzheimer's disease, memory impairment
MeSH terms
Diffusion, Synaptic Transmission, Synapses, Long-Term Potentiation, Receptors, AMPA

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