Cited by 271Neuroscience and Neuropharmacology ResearchProtein Kinase Regulation and GTPase SignalingGenetics and Neurodevelopmental Disorders

Rapid dispersion of SynGAP from synaptic spines triggers AMPA receptor insertion and spine enlargement during LTP

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Araki, Yoichi, Zeng, Menglong, Zhang, Mingjie, Huganir, Richard L.·2015·Neuron

Abstract

SynGAP is a Ras-GTPase activating protein highly enriched at excitatory synapses in the brain. Previous studies have shown that CaMKII and the RAS-ERK pathway are critical for several forms of synaptic plasticity including LTP. NMDA receptor-dependent calcium influx has been shown to regulate the RAS-ERK pathway and downstream events that result in AMPA receptor synaptic accumulation, spine enlargement, and synaptic strengthening during LTP. However, the cellular mechanisms whereby calcium influx and CaMKII control Ras activity remain elusive. Using live-imaging techniques, we have found that SynGAP is rapidly dispersed from spines upon LTP induction in hippocampal neurons, and this dispersion depends on phosphorylation of SynGAP by CaMKII. Moreover, the degree of acute dispersion predicts the maintenance of spine enlargement. Thus, the synaptic dispersion of SynGAP by CaMKII phosphorylation during LTP represents a key signaling component that transduces CaMKII activity to small G protein-mediated spine enlargement, AMPA receptor synaptic incorporation, and synaptic potentiation.

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Crossref · 10.1016/j.neuron.2014.12.023

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  • Long-term potentiation induced via APV withdrawal and glycine stimulation resulted in an increase in PSD-95 localization density within nanoclusters, the percentage of PSD-95 nanoclusters enriched with RIM1/2, and the enrichment index of PSD-95 nanoclusters.

    “To test this, we induced long-term potentiation via APV withdrawal and glycine stimulation19 which resulted in an increase in PSD-95 localization density within NCs, the percentage of PSD-95 NCs enriched with RIM1/2, and the enrichment index of PSD-95 NCs (Fig. 4a–c, Extended Data Fig. 10m).”

    From A trans-synaptic nanocolumn aligns neurotransmitter release to receptors (2016) · cites this paper as [19]

    Split into 2 atoms — 0 confirmed, 2 partially supported, 0 disputed, 0 misattributed, 0 unverifiable. Expand the claim to see per-atom verdicts.

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  • Long-term potentiation can be induced via APV withdrawal and glycine stimulation.

    “we induced long-term potentiation via APV withdrawal and glycine stimulation19”

    From A trans-synaptic nanocolumn aligns neurotransmitter release to receptors (2016) · cites this paper as [19]

    The Experimental Procedures section (page unavailable) describes inducing LTP by perfusing hippocampal neurons with glycine-containing, magnesium-free solution. The paper lists APV as a reagent and reports that APV blocks chemLTP-induced SynGAP dispersion, but our copy does not describe APV withdrawal as part of the induction method. (LLM, conf=0.88)

    Experimental — accuracy not yet measured
  • Activity regulates the targeting of SYNGAP1 through its phosphorylation by Ca2+/calmodulin-dependent protein kinase II (CAMK2).

    “Several mechanisms should be considered, including indirect effects on synaptic features such as activity, which regulates the targeting of SYNGAP1 through its phosphorylation by Ca2+/calmodulin-dependent protein kinase II (CAMK2).54”
  • Phosphorylation triggers movement of SynGAP out of the PSD.

    “Imaging studies have reported that this phosphorylation triggers movement of SynGAP out of the PSD (304, 305)”

    From Synaptic memory and CaMKII (2023) · cites this paper as [304]

  • Knockdown of SynGAP results in accumulation of synaptic AMPARs, which occludes chemLTP.

    “Furthermore, knockdown of SynGAP results in the accumulation of synaptic AMPARs, which occludes chemLTP (304).”

    From Synaptic memory and CaMKII (2023) · cites this paper as [304]

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Authors
Araki, Y., Zeng, M., Zhang, M., & Huganir, R. L.
Affiliations
  • Howard Hughes Medical Institute (US)
  • Hong Kong University of Science and Technology (HK)
Corresponding author
Huganir, Richard L.
Venue
Neuron
Publisher
Elsevier BV
Published
2015-01
Volume
85
Issue
1
Pages
173-189
ISSN
0896-6273 (ISSN-L)
OpenAlex
W1993505652
Cited by
271
References
57
Citations by year
2026: 18 · 2025: 31 · 2024: 36 · 2023: 22 · 2022: 23 · 2021: 15 · 2020: 31 · 2019: 20 · 2018: 29 · 2017: 19 · 2016: 18 · 2015: 9
FWCI
11.61
Type
journal article
Language
en
Open access
Locations
  • Neuron (publishedVersion)
  • PubMed (publishedVersion)
  • Europe PMC (PubMed Central) (acceptedVersion)
  • PubMed Central (acceptedVersion)
  • Rare & Special e-Zone (The Hong Kong University of Science and Technology) (submittedVersion)
Funders
  • Howard Hughes Medical Institute
  • National Institute of Mental Health (MH64856, R01MH064856)
  • National Institute of Neurological Disorders and Stroke (R01NS036715, NS036715, R37NS036715)
Topics
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neuropharmacology Research
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Protein Kinase Regulation and GTPase Signaling
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Genetics and Neurodevelopmental Disorders
Keywords
SynGAP, CaMKII, long-term potentiation, Ras/ERK pathway, synaptic plasticity, hippocampal neurons, small GTPases, synaptic potentiation
MeSH terms
Animals, Calcium, Hippocampus, Neuronal Plasticity, Neurons, Phosphorylation, Signal Transduction, Receptors, N-Methyl-D-Aspartate, Long-Term Potentiation, Receptors, AMPA, ras Proteins, GTPase-Activating Proteins, MAP Kinase Signaling System, Long-Term Synaptic Depression, Dendritic Spines, Rats, Calcium-Calmodulin-Dependent Protein Kinase Type 2

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