Cited by 494Neuroscience and Neuropharmacology ResearchGenetics and Neurodevelopmental DisordersReceptor Mechanisms and Signaling

Differential roles of NR2A- and NR2B-containing NMDA receptors in Ras-ERK signaling and AMPA receptor trafficking

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Kim, Myung Jong, Dunah, Anthone W., Wang, Yu Tian, Sheng, Morgan·2005·Neuron

Abstract

NMDA receptors (NMDARs) control bidirectional synaptic plasticity by regulating postsynaptic AMPA receptors (AMPARs). Here we show that NMDAR activation can have differential effects on AMPAR trafficking, depending on the subunit composition of NMDARs. In mature cultured neurons, NR2A-NMDARs promote, whereas NR2B-NMDARs inhibit, the surface expression of GluR1, primarily by regulating its surface insertion. In mature neurons, NR2B is coupled to inhibition rather than activation of the Ras-ERK pathway, which drives surface delivery of GluR1. Moreover, the synaptic Ras GTPase activating protein (GAP) SynGAP is selectively associated with NR2B-NMDARs in brain and is required for inhibition of NMDAR-dependent ERK activation. Preferential coupling of NR2B to SynGAP could explain the subtype-specific function of NR2B-NMDARs in inhibition of Ras-ERK, removal of synaptic AMPARs, and weakening of synaptic transmission.

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Crossref · 10.1016/j.neuron.2005.04.031

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  • Disrupting SynGAP expression in dissociated hippocampal neurons can enhance or suppress dendritic spine function.

    “In addition, disrupting SynGAP expression in dissociated hippocampal neurons can enhance dendritic spine function (Kim et al., 2005; Rumbaugh et al., 2006) or suppress it (Krapivinsky et al., 2004).”
  • SynGAP shapes developmental synaptic function through its synaptic GAP activity, suppressing biochemical signaling cascades in dendritic spines that promote synapse growth and AMPA receptor insertion.

    “Mechanistically, SynGAP shapes developmental synaptic function through its synaptic GAP activity, where it suppresses many biochemical signaling cascades within dendritic spines that promote growth of synapses and insertion of AMPARs (Kim et al., 2005; Krapivinsky et al., 2004; Rumbaugh et al., 2006).”
  • The role of SynGAP in regulating dendritic spine synapse function has been controversial, with some studies reporting repression and others stimulation.

    “However, the role that SynGAP plays in neurons to regulate dendritic spine synapse function has been controversial because some studies report that SynGAP is a repressor of these synapses (Kim et al., 2005; Rumbaugh et al., 2006; Vazquez et al., 2004), while others report that it stimulates them (Krapivinsky et al., 2004; McMahon et al., 2012).”

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Authors
Kim, M. J., Dunah, A. W., Wang, Y. T., & Sheng, M.
Affiliations
  • Howard Hughes Medical Institute (US)
  • University of British Columbia Hospital (CA)
Corresponding author
Sheng, Morgan
Venue
Neuron
Publisher
Elsevier BV
Published
2005-06
Volume
46
Issue
5
Pages
745-760
ISSN
0896-6273 (ISSN-L)
OpenAlex
W2032596004
Cited by
494
References
49
Citations by year
2026: 5 · 2025: 13 · 2024: 12 · 2023: 13 · 2022: 8 · 2021: 10 · 2020: 11 · 2019: 23 · 2018: 25 · 2017: 29 · 2016: 21 · 2015: 21 · 2014: 24 · 2013: 18 · 2012: 32
FWCI
13.50
Type
journal article
Language
en
Open access
Locations
  • Neuron (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neuropharmacology Research
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Genetics and Neurodevelopmental Disorders
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Receptor Mechanisms and Signaling
Keywords
NMDA receptor, NR2A, NR2B, AMPA receptor trafficking, GluR1, Ras/ERK signaling, SynGAP, synaptic plasticity, synaptic transmission, receptor subunit composition
MeSH terms
Animals, Cell Membrane, Cells, Cultured, Hippocampus, Receptors, N-Methyl-D-Aspartate, N-Methylaspartate, Receptors, AMPA, ras Proteins, MAP Kinase Signaling System, Protein Transport, Extracellular Signal-Regulated MAP Kinases, Rats

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