Cited by 245Neuroscience and Neuropharmacology ResearchMemory and Neural MechanismsGenetics and Neurodevelopmental Disorders

Arc regulates spine morphology and maintains network stability in vivo

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Peebles, Carol L., Yoo, Jong, Thwin, Myo T., Palop, Jorge J., Noebels, Jeffrey L., Finkbeiner, Steven·2010·Proceedings of the National Academy of Sciences

Abstract

Long-term memory relies on modulation of synaptic connections in response to experience. This plasticity involves trafficking of AMPA receptors (AMPAR) and alteration of spine morphology. Arc, a gene induced by synaptic activity, mediates the endocytosis of AMPA receptors and is required for both long-term and homeostatic plasticity. We found that Arc increases spine density and regulates spine morphology by increasing the proportion of thin spines. Furthermore, Arc specifically reduces surface GluR1 internalization at thin spines, and Arc mutants that fail to facilitate AMPAR endocytosis do not increase the proportion of thin spines, suggesting that Arc-mediated AMPAR endocytosis facilitates alterations in spine morphology. Thus, by linking spine morphology with AMPAR endocytosis, Arc balances synaptic downscaling with increased structural plasticity. Supporting this, loss of Arc in vivo leads to a significant decrease in the proportion of thin spines and an epileptic-like network hyperexcitability.

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Crossref · 10.1073/pnas.1006546107

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Authors
Peebles, C. L., Yoo, J., Thwin, M. T., Palop, J. J., Noebels, J. L., & Finkbeiner, S.
Affiliations
  • Gladstone Institutes (US)
  • Baylor College of Medicine (US)
Venue
Proceedings of the National Academy of Sciences
Published
2010-10-04
Volume
107
Issue
42
Pages
18173-18178
ISSN
  • 0027-8424 (ISSN-L)
  • 1091-6490
OpenAlex
W2020469828
Cited by
245
References
4
Citations by year
2026: 3 · 2025: 10 · 2024: 12 · 2023: 13 · 2022: 20 · 2021: 17 · 2020: 15 · 2019: 12 · 2018: 25 · 2017: 28 · 2016: 18 · 2015: 13 · 2014: 12 · 2013: 20 · 2012: 17
FWCI
6.07
Type
journal article
Language
en
Open access
Locations
  • Proceedings of the National Academy of Sciences (publishedVersion)
  • Europe PMC (PubMed Central) (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • W. M. Keck Foundation
  • Epilepsy Foundation
  • Massachusetts Institute of Technology
  • University College London
  • National Institutes of Health (1c06rr018928-01, AG‐022074)
  • Intellectual and Developmental Disabilities Research Center (HD024064)
  • University of California, Irvine
  • National Institute on Aging (P01AG022074)
  • National Institute of General Medical Sciences (HD024064)
  • National Institute of Neurological Disorders and Stroke (2R01 NS0390746, R01NS045191, NS29709, R01NS029709)
  • National Center for Research Resources (C06-RR-018928)
  • Eunice Kennedy Shriver National Institute of Child Health and Human Development (HD 024064, P30HD024064)
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
Arc, dendritic spine morphology, AMPA receptor endocytosis, GluR1, synaptic plasticity, homeostatic plasticity, synaptic downscaling, network stability, long-term memory, synaptic homeostasis
MeSH terms
Animals, Cytoskeletal Proteins, Memory, Nerve Tissue Proteins, Neuropeptide Y, Synapses, Receptors, AMPA, Mice, Knockout, Mice

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