Cited by 383Connexins and lens biologyNeuroscience and Neuropharmacology ResearchNeural dynamics and brain function

Astroglial networks scale synaptic activity and plasticity

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Pannasch, Ulrike, Vargová, Lydia, Reingruber, Jürgen, Ezan, Pascal, Holcman, David, Giaume, Christian, Syková, Eva, Rouach, Nathalie·2011·Proceedings of the National Academy of Sciences

Abstract

Astrocytes dynamically interact with neurons to regulate synaptic transmission. Although the gap junction proteins connexin 30 (Cx30) and connexin 43 (Cx43) mediate the extensive network organization of astrocytes, their role in synaptic physiology is unknown. Here we show, by inactivating Cx30 and Cx43 genes, that astroglial networks tone down hippocampal synaptic transmission in CA1 pyramidal neurons. Gap junctional networking facilitates extracellular glutamate and potassium removal during synaptic activity through modulation of astroglial clearance rate and extracellular space volume. This regulation limits neuronal excitability, release probability, and insertion of postsynaptic AMPA receptors, silencing synapses. By controlling synaptic strength, connexins play an important role in synaptic plasticity. Altogether, these results establish connexins as critical proteins for extracellular homeostasis, important for the formation of functional synapses.

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  1. [26]Giaume C, Tabernero A, Medina JM. Metabolic trafficking through astrocytic gap junctions. Glia. 1997;21:114–123. [PubMed] [Google Scholar]

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Authors
Pannasch, U., Vargová, L., Reingruber, J., Ezan, P., Holcman, D., Giaume, C., Syková, E., & Rouach, N.
Affiliations
  • Centre National de la Recherche Scientifique (FR)
  • Department of Neuroscience and Center for Cell therapy and Tissue Repair, Charles University, Second Faculty of Medicine, 150 06 Prague, Czech Republic;
  • Czech Academy of Sciences (CZ)
Venue
Proceedings of the National Academy of Sciences
Published
2011-05-02
Volume
108
Issue
20
Pages
8467-8472
ISSN
  • 0027-8424 (ISSN-L)
  • 1091-6490
OpenAlex
W2158211937
Cited by
383
References
34
Citations by year
2026: 14 · 2025: 15 · 2024: 23 · 2023: 22 · 2022: 17 · 2021: 28 · 2020: 30 · 2019: 24 · 2018: 31 · 2017: 23 · 2016: 22 · 2015: 26 · 2014: 31 · 2013: 31 · 2012: 38
FWCI
13.75
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)
  • ASEP (publishedVersion)
  • HAL (submittedVersion)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Connexins and lens biology
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neuropharmacology Research
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Neural dynamics and brain function
Keywords
astrocytes, connexin 30, connexin 43, gap junctions, synaptic transmission, synaptic plasticity, hippocampus, CA1 pyramidal neurons, glutamate clearance, potassium clearance, extracellular space volume, release probability, neuronal excitability, synaptogenesis
MeSH terms
Connexin 30, Animals, Astrocytes, Hippocampus, Nerve Net, Synaptic Transmission, Neuronal Plasticity, Potassium, Synapses, Gap Junctions, Connexins, Connexin 43, Glutamic Acid, Mice

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