Cited by 310Neuroscience and Neuropharmacology ResearchMemory and Neural MechanismsGenetics and Neurodevelopmental Disorders

Inverse synaptic tagging of inactive synapses via dynamic interaction of Arc/Arg3.1 with CaMKIIβ

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Okuno, Hiroyuki, Akashi, Kaori, Ishii, Yuichiro, Yagishita-Kyo, Nan, Suzuki, Kanzo, Nonaka, Mio, Kawashima, Takashi, Fujii, Hajime +7 more·2012·Cell

Abstract

The Arc/Arg3.1 gene product is rapidly upregulated by strong synaptic activity and critically contributes to weakening synapses by promoting AMPA-R endocytosis. However, how activity-induced Arc is redistributed and determines the synapses to be weakened remains unclear. Here, we show targeting of Arc to inactive synapses via a high-affinity interaction with CaMKIIβ that is not bound to calmodulin. Synaptic Arc accumulates in inactive synapses that previously experienced strong activation and correlates with removal of surface GluA1 from individual synapses. A lack of CaMKIIβ either in vitro or in vivo resulted in loss of Arc upregulation in the silenced synapses. The discovery of Arc's role in "inverse" synaptic tagging that is specific for weaker synapses and prevents undesired enhancement of weak synapses in potentiated neurons reconciles essential roles of Arc both for the late phase of long-term plasticity and for reduction of surface AMPA-Rs in stimulated neurons.

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Crossref · 10.1016/j.cell.2012.02.062

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  • βCaMKII serves as an activity sensor: when Ca2+ is low, CaM-free, kinase-deactivated βCaMKII interacts with Arc and facilitates Arc-mediated endocytosis of AMPARs.

    “Okuno et al. have shown that βCaMKII serves as an activity sensor; when Ca2+ is low, CaM-free, kinase-deactivated βCaMKII interacts directly with Arc and helps facilitate Arc-mediated endocytosis of AMPARs (Okuno et al., 2012).”
  • Food intake activates vagal afferents that reach the nucleus tractus solitarius, where A2 noradrenergic neurons project to the hypothalamus, stimulating hypothalamic oxytocin neurons.

    “Food intake activates vagal afferents which reach the nucleus tractus solitarius where A2 noradrenergic neurons (Dahlstroem and Fuxe, 1964) project to the hypothalamus, especially those expressing prolactin-releasing peptide (Okuno et al., 2012), where the hypothalamic oxytocin neurons become stimulated (Okuno et al., 2012).”

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Authors
Okuno, H., Akashi, K., Ishii, Y., Yagishita-Kyo, N., Suzuki, K., Nonaka, M., Kawashima, T., Fujii, H., Takemoto-Kimura, S., Abe, M., Natsume, R., Chowdhury, S., Sakimura, K., Worley, P. F., & Bito, H.
Affiliations
  • Japan Science and Technology Agency (JP)
  • Brain Research Institute, Niigata University (JP)
  • The University of Tokyo (JP)
  • Johns Hopkins University (US)
Corresponding author
  • Okuno, Hiroyuki
  • Bito, Haruhiko
Venue
Cell
Publisher
Elsevier BV
Published
2012-05
Volume
149
Issue
4
Pages
886-898
ISSN
0092-8674 (ISSN-L)
OpenAlex
W2113849086
Cited by
310
References
50
Citations by year
2026: 13 · 2025: 18 · 2024: 20 · 2023: 17 · 2022: 19 · 2021: 21 · 2020: 23 · 2019: 22 · 2018: 29 · 2017: 31 · 2016: 17 · 2015: 21 · 2014: 34 · 2013: 17 · 2012: 8
FWCI
10.54
Type
journal article
Language
en
Open access
Locations
  • Cell (publishedVersion)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
Funders
  • Japan Society for the Promotion of Science (24700321, 221S0003, 21500301, 20670002, 23680040, 22800011, 24300117)
  • National Institute of Mental Health (R01MH053608)
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/Arg3.1, CaMKIIβ, synaptic tagging, AMPA receptor endocytosis, GluR1, long-term synaptic plasticity, synaptic depression
MeSH terms
Animals, Cells, Cultured, Cytoskeletal Proteins, Hippocampus, Mice, Inbred C57BL, Mice, Transgenic, Nerve Tissue Proteins, Neurons, Synapses, Rats, Sprague-Dawley, Dendritic Spines, Mice, Rats, Calcium-Calmodulin-Dependent Protein Kinase Type 2

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