Cited by 109Cellular transport and secretionNeuroscience and Neuropharmacology ResearchCaveolin-1 and cellular processes

Actin Is Crucial for All Kinetically Distinguishable Forms of Endocytosis at Synapses

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Wu, Xin-Sheng, Lee, Sung Hoon, Sheng, Jiansong, Zhang, Zhen, Zhao, Wei-Dong, Wang, Dongsheng, Jin, Yinghui, Charnay, Patrick +2 more·2016·Neuron

Abstract

Mechanical force is needed to mediate endocytosis. Whether actin, the most abundant force-generating molecule, is essential for endocytosis is highly controversial in mammalian cells, particularly synapses, likely due to the use of actin blockers, the efficiency and specificity of which are often unclear in the studied cell. Here we addressed this issue using a knockout approach combined with measurements of membrane capacitance and fission pore conductance, imaging of vesicular protein endocytosis, and electron microscopy. We found that two actin isoforms, β- and γ-actin, are crucial for slow, rapid, bulk, and overshoot endocytosis at large calyx-type synapses, and for slow endocytosis and bulk endocytosis at small hippocampal synapses. Polymerized actin provides mechanical force to form endocytic pits. Actin also facilitates replenishment of the readily releasable vesicle pool, likely via endocytic clearance of active zones. We conclude that polymerized actin provides mechanical force essential for all kinetically distinguishable forms of endocytosis at synapses.

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  1. Voiculescu O Charnay P Schneider-Maunoury S 2000 Expression pattern of a Krox-20/Cre knock-in allele in the developing hindbrain, bones, and peripheral nervous system Genesis 26 123 126 10686605

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Authors
Wu, X.-S., Lee, S. H., Sheng, J., Zhang, Z., Zhao, W.-D., Wang, D., Jin, Y., Charnay, P., Ervasti, J. M., & Wu, L.-G.
Affiliations
  • National Institute of Neurological Disorders and Stroke (US)
  • Centre National de la Recherche Scientifique (FR)
  • University of Minnesota (US)
Corresponding author
  • Sheng, Jiansong
  • Zhang, Zhen
  • Wu, Ling-Gang
Venue
Neuron
Publisher
Elsevier BV
Published
2016-12
Volume
92
Issue
5
Pages
1020-1035
ISSN
0896-6273 (ISSN-L)
OpenAlex
W2549187804
Cited by
109
References
50
Citations by year
2026: 7 · 2025: 6 · 2024: 12 · 2023: 15 · 2022: 15 · 2021: 12 · 2020: 11 · 2019: 8 · 2018: 10 · 2017: 12 · 2016: 1
FWCI
7.12
Type
journal article
Language
en
Open access
Locations
  • Neuron (publishedVersion)
  • PubMed (publishedVersion)
  • Europe PMC (PubMed Central) (acceptedVersion)
  • PubMed Central (acceptedVersion)
Funders
  • National Institutes of Health (Z99 NS999999)
  • National Institute on Deafness and Other Communication Disorders (R01DC005200)
  • National Institute of General Medical Sciences (R01GM065358)
  • National Institute of Neurological Disorders and Stroke (Z01NS003009)
  • National Institute of Arthritis and Musculoskeletal and Skin Diseases (R01AR049899)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cell Biology › Cellular transport and secretion
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neuropharmacology Research
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cell Biology › Caveolin-1 and cellular processes
Keywords
actin, synaptic endocytosis, beta-actin, gamma-actin, actin polymerization, mechanical forces, hippocampal synapses, membrane capacitance
MeSH terms
Actins, Animals, Endocytosis, Hippocampus, Immunohistochemistry, Kinetics, Microscopy, Electron, Neurons, Synapses, Blotting, Western, Presynaptic Terminals, Mice, Knockout, Transport Vesicles, Mice

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