Cited by 177Neuroscience and Neuropharmacology ResearchMemory and Neural MechanismsTreatment of Major Depression

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Multiple Mechanisms for the Potentiation of AMPA Receptor-Mediated Transmission by α-Ca2+/Calmodulin-Dependent Protein Kinase II

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Poncer, Jean Christophe, Esteban, José A., Malinow, Roberto·2002·The Journal of Neuroscience

Abstract

Some forms of activity-dependent synaptic potentiation require the activation of postsynaptic Ca(2+)/calmodulin-dependent protein kinase II (CaMKII). Activation of CaMKII has been shown to phosphorylate the glutamate receptor 1 subunit of the AMPA receptor (AMPAR), thereby affecting some of the properties of the receptor. Here, a recombinant, constitutively active form of alphaCaMKII tagged with the fluorescent marker green fluorescent protein (GFP) [alphaCaMKII(1-290)-enhanced GFP (EGFP)] was expressed in CA1 pyramidal neurons from hippocampal slices. The changes in glutamatergic transmission onto these cells were analyzed. AMPA but not NMDA receptor-mediated EPSCs were specifically potentiated in infected compared with nearby noninfected neurons. This potentiation was associated with a reduction in the proportion of synapses devoid of AMPARs. In addition, expression of alphaCaMKII(1-290)-EGFP increased the quantal size of AMPAR-mediated responses. This effect reflected, at least in part, an increased unitary conductance of the channels underlying the EPSCs. These results reveal that several key features of long-term potentiation of hippocampal glutamatergic synapses are reproduced by the sole activity of alphaCaMKII.

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Crossref · 10.1523/jneurosci.22-11-04406.2002

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Metadata

Authors
Poncer, J. C., Esteban, J. A., & Malinow, R.
Affiliations
  • Inserm (FR)
  • Cold Spring Harbor Laboratory (US)
Venue
The Journal of Neuroscience
Published
2002-06-01
Volume
22
Issue
11
Pages
4406-4411
ISSN
  • 0270-6474 (ISSN-L)
  • 1529-2401
OpenAlex
W1756593109
Cited by
177
References
46
Citations by year
2026: 2 · 2025: 1 · 2024: 5 · 2023: 4 · 2022: 4 · 2021: 6 · 2020: 4 · 2019: 1 · 2018: 7 · 2017: 3 · 2016: 3 · 2015: 9 · 2014: 10 · 2013: 8 · 2012: 7
FWCI
5.13
Type
journal article
Language
en
Open access
Locations
  • Journal of Neuroscience (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
  • Cold Spring Harbor Laboratory Institutional Repository (Cold Spring Harbor Laboratory) (acceptedVersion)
Funders
  • G. Harold and Leila Y. Mathers Foundation
  • National Institutes of Health
Topics
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neuropharmacology Research
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Memory and Neural Mechanisms
  • Health Sciences › Medicine › Pharmacology (medical) › Treatment of Major Depression
Keywords
CaMKIIα, AMPA receptors, synaptic potentiation, long-term potentiation, CA1 pyramidal neurons, hippocampus, glutamatergic synapses, quantal size, single-channel conductance, activity-dependent synaptic plasticity, NMDA receptor
MeSH terms
Animals, Female, Hippocampus, Luminescent Proteins, Male, Synaptic Transmission, Neuronal Plasticity, Recombinant Fusion Proteins, Sindbis Virus, Gene Expression, Long-Term Potentiation, Calcium-Calmodulin-Dependent Protein Kinases, Pyramidal Cells, Receptors, AMPA, Patch-Clamp Techniques, Transgenes, Excitatory Postsynaptic Potentials, Rats, Calcium-Calmodulin-Dependent Protein Kinase Type 2, In Vitro Techniques

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