Cited by 633Neuroscience and Neuropharmacology ResearchGenetics and Neurodevelopmental DisordersTreatment of Major Depression

Miniature Neurotransmission Stabilizes Synaptic Function via Tonic Suppression of Local Dendritic Protein Synthesis

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Sutton, Michael A., Ito, Hiroshi T., Cressy, Paola, Kempf, Christian, Woo, Jessica C., Schuman, Erin M.·2006·Cell

Abstract

Activity deprivation in neurons induces a slow compensatory scaling up of synaptic strength, reflecting a homeostatic mechanism for stabilizing neuronal activity. Prior studies have focused on the loss of action potential (AP) driven neurotransmission in synaptic homeostasis. Here, we show that the miniature synaptic transmission that persists during AP blockade profoundly shapes the time course and mechanism of homeostatic scaling. A brief blockade of NMDA receptor (NMDAR) mediated miniature synaptic events ("minis") rapidly scales up synaptic strength, over an order of magnitude faster than with AP blockade alone. The rapid scaling induced by NMDAR mini blockade is mediated by increased synaptic expression of surface GluR1 and the transient incorporation of Ca2+-permeable AMPA receptors at synapses; both of these changes are implemented locally within dendrites and require dendritic protein synthesis. These results indicate that NMDAR signaling during miniature synaptic transmission serves to stabilize synaptic function through active suppression of dendritic protein synthesis.

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Crossref · 10.1016/j.cell.2006.03.040

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  • When global block of firing with TTX is combined with local glutamate receptor block, there is a local enhancement of GluA1 accumulation at the blocked synapses.

    “Interestingly, when global block of firing with TTX is combined with local glutamate receptor block, there is a local enhancement of GluA1 accumulation at the blocked synapses (Sutton et al. 2006).”
  • Enhanced AMPAR accumulation under conditions of both action potential and NMDAR block involves local synthesis and insertion of GluA1-containing/GluA2-lacking AMPAR into synapses, so that the synaptic composition of AMPAR is modified.

    “Enhanced AMPAR accumulation under conditions of both action potential and NMDAR block involves local synthesis and insertion of GluA1-containing/GluA2-lacking AMPAR into synapses, so that the synaptic composition of AMPAR is modified (Ju et al. 2004;Sutton et al. 2006;Aoto et al. 2008).”
  • Scaling is a gradual and cumulative process evident after as little as 4-6 h of activity blockade.

    “Inconsistent with the above model is the observation that scaling is a gradual and cumulative process evident after as little as 4-6 h of activity blockade (Sutton et al. 2006;Ibata et al. 2008), whereas TNFa-dependent scaling was only observed after prolonged activity block (48 h) (Stellwagen and Malenka 2006).”

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Authors
Sutton, M. A., Ito, H. T., Cressy, P., Kempf, C., Woo, J. C., & Schuman, E. M.
Affiliations
California Institute of Technology (US)
Corresponding author
Schuman, Erin M.
Venue
Cell
Publisher
Elsevier BV
Published
2006-05
Volume
125
Issue
4
Pages
785-799
ISSN
0092-8674 (ISSN-L)
OpenAlex
W2031779883
Cited by
633
References
3
Citations by year
2026: 11 · 2025: 25 · 2024: 21 · 2023: 31 · 2022: 19 · 2021: 29 · 2020: 33 · 2019: 27 · 2018: 39 · 2017: 26 · 2016: 26 · 2015: 33 · 2014: 32 · 2013: 51 · 2012: 47
FWCI
12.66
Type
journal article
Language
en
Open access
Locations
  • Cell (publishedVersion)
  • PubMed (publishedVersion)
  • MPG.PuRe (Max Planck Society) (submittedVersion)
Topics
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neuropharmacology Research
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Genetics and Neurodevelopmental Disorders
  • Health Sciences › Medicine › Pharmacology › Treatment of Major Depression
Keywords
synaptic homeostasis, NMDA receptor signaling, GluR1, Ca2+-permeable AMPA receptors, dendritic protein synthesis, synaptic scaling, activity deprivation, action potential blockade, synaptic plasticity
MeSH terms
Action Potentials, Animals, Cells, Cultured, Cobalt, Dendrites, Hippocampus, Homeostasis, Nerve Tissue Proteins, Synaptic Transmission, Synapses, Signal Transduction, Receptors, N-Methyl-D-Aspartate, Receptors, AMPA, Patch-Clamp Techniques, Excitatory Amino Acid Agonists, Excitatory Postsynaptic Potentials, Protein Subunits, Rats, In Vitro Techniques

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