Cited by 493Neuroscience and Neuropharmacology ResearchCellular transport and secretionExtracellular vesicles in disease

Plasticity-induced growth of dendritic spines by exocytic trafficking from recycling endosomes

Open access
Park, Mikyoung, Salgado, Jennifer M., Ostroff, Linnaea, Helton, Thomas D., Robinson, Camenzind G., Harris, Kristen M., Ehlers, Michael D.·2006·Neuron

Abstract

Dendritic spines are micron-sized membrane protrusions receiving most excitatory synaptic inputs in the mammalian brain. Spines form and grow during long-term potentiation (LTP) of synaptic strength. However, the source of membrane for spine formation and enlargement is unknown. Here we report that membrane trafficking from recycling endosomes is required for the growth and maintenance of spines. Using live-cell imaging and serial section electron microscopy, we demonstrate that LTP-inducing stimuli promote the mobilization of recycling endosomes and vesicles into spines. Preventing recycling endosomal transport abolishes LTP-induced spine formation. Using a pH-sensitive recycling cargo, we show that exocytosis from recycling endosomes occurs locally in spines, is triggered by activation of synaptic NMDA receptors, and occurs concurrently with spine enlargement. Thus, recycling endosomes provide membrane for activity-dependent spine growth and remodeling, defining a novel membrane trafficking mechanism for spine morphological plasticity and providing a mechanistic link between structural and functional plasticity during LTP.

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Registry

Crossref · 10.1016/j.neuron.2006.09.040

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9 of 9 references verified0 citation errors · 0 not checkable

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  • Recycling endosomes necessary for delivery and retrieval of receptors operate both close to the synapse, within the head of the spine and in the dendritic shaft.

    “These endosomes, necessary for the delivery and the retrieval of receptors, have been found to operate both close to the synapse, within the head of the spine and in the dendritic shaft (Park et al., 2006; Wang et al., 2008).”
  • Exocytic trafficking from recycling compartments contributes to dendritic spine growth in response to activity.

    “Exocytic trafficking from recycling compartments contributes to dendritic spine growth in response to activity (Park et al, 2006;Kennedy et al, 2010)”
  • LTP increases spine volume, a process that requires the addition of membranes whose source remains largely unknown.

    “In particular, LTP increases spine volume, a process that requires the addition of membranes whose source remains largely unknown”

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Authors
Park, M., Salgado, J. M., Ostroff, L., Helton, T. D., Robinson, C. G., Harris, K. M., & Ehlers, M. D.
Affiliations
  • Duke Medical Center (US)
  • Augusta University (US)
  • Howard Hughes Medical Institute (US)
Corresponding author
Ehlers, Michael D.
Venue
Neuron
Publisher
Elsevier BV
Published
2006-12
Volume
52
Issue
5
Pages
817-830
ISSN
0896-6273 (ISSN-L)
OpenAlex
W2135004571
Cited by
493
References
9
Citations by year
2026: 8 · 2025: 12 · 2024: 14 · 2023: 6 · 2022: 13 · 2021: 19 · 2020: 30 · 2019: 18 · 2018: 20 · 2017: 22 · 2016: 20 · 2015: 25 · 2014: 39 · 2013: 42 · 2012: 23
FWCI
14.93
Type
journal article
Language
en
Open access
Locations
  • Neuron (publishedVersion)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
Funders
  • American Health Assistance Foundation
  • Raymond and Beverly Sackler Foundation (EB002170, NS21184, NS33574)
Topics
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neuropharmacology Research
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cell Biology › Cellular transport and secretion
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Extracellular vesicles in disease
Keywords
dendritic spines, recycling endosomes, exocytosis, membrane trafficking, long-term potentiation, synaptic plasticity, NMDA receptor, synaptic vesicles
MeSH terms
Animals, Biological Transport, Active, DNA, Electrophysiology, Exocytosis, Hippocampus, Image Processing, Computer-Assisted, Immunohistochemistry, Microscopy, Electron, Neuronal Plasticity, Endosomes, Receptors, N-Methyl-D-Aspartate, Long-Term Potentiation, Microscopy, Electron, Transmission, Cell Size, Dendritic Spines, Rats

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