Cited by 444Neuroscience and Neuropharmacology ResearchAdvanced Fluorescence Microscopy TechniquesMemory and Neural Mechanisms

Spine neck plasticity regulates compartmentalization of synapses

Tønnesen, Jan, Katona, Gergely, Rózsa, Balázs, Nägerl, U Valentin·2014·Nature Neuroscience

Abstract

Dendritic spines have been proposed to transform synaptic signals through chemical and electrical compartmentalization. However, the quantitative contribution of spine morphology to synapse compartmentalization and its dynamic regulation are still poorly understood. We used time-lapse super-resolution stimulated emission depletion (STED) imaging in combination with fluorescence recovery after photobleaching (FRAP) measurements, two-photon glutamate uncaging, electrophysiology and simulations to investigate the dynamic link between nanoscale anatomy and compartmentalization in live spines of CA1 neurons in mouse brain slices. We report a diversity of spine morphologies that argues against common categorization schemes and establish a close link between compartmentalization and spine morphology, wherein spine neck width is the most critical morphological parameter. We demonstrate that spine necks are plastic structures that become wider and shorter after long-term potentiation. These morphological changes are predicted to lead to a substantial drop in spine head excitatory postsynaptic potential (EPSP) while preserving overall biochemical compartmentalization.

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Crossref · 10.1038/nn.3682

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  • Two-photon glutamate uncaging experiments on single spines indicate that synapses that already express functional AMPARs can be further enhanced by inducing LTP.

    “Furthermore, two-photon glutamate uncaging experiments on single spines indicate that synapses that already express functional AMPARs can be further enhanced by inducing LTP (246–248).”

    From Synaptic memory and CaMKII (2023) · cites this paper as [248]

  • LTP is associated with a long-lasting increase in spine size, including a late increase in the size of the PSD and a slow increase in the size of the presynaptic bouton.

    “LTP is associated with a long-lasting increase in spine size (247, 248), including a late increase in the size of the PSD (56, 213, 414, 415) and additionally a slow increase in the size of the presynaptic bouton (213, 414).”

    From Synaptic memory and CaMKII (2023) · cites this paper as [248]

  • Parallel to the electrophysiological changes during LTP is an enlargement of the spine and a widening of the spine neck.

    “Parallel to the electrophysiological changes during LTP is an enlargement of the spine and a widening of the spine neck (247, 248).”

    From Synaptic memory and CaMKII (2023) · cites this paper as [248]

  • LTP-inducing stimuli cause rapid addition of AMPARs to classical dendritic spines.

    “These synapses contain AMPARs, but LTP-inducing stimuli cause a rapid addition of AMPARs to the synapse (246–250).”

    From Synaptic memory and CaMKII (2023) · cites this paper as [248]

    The section “LTP leads to plasticity in spine head and neck geometry” (pp. 10–11) reports potentiated currents and changes in spine shape after LTP induction, but does not say that AMPARs were rapidly added to synapses. Searches for AMPAR insertion and rapid receptor addition found no passage addressing that mechanism in our copy. (LLM, conf=0.74)

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Research works printed but not linked: 1

  1. [7]7. Nägerl, U.V., Eberhorn, N., Cambridge, S.B. & Bonhoeffer, T. Bidirectional activity-dependent morphological plasticity in hippocampal neurons. Neuron 44 , 759-767 (2004).

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Authors
Tønnesen, J., Katona, G., Rózsa, B., & Nägerl, U. V.
Affiliations
  • Centre National de la Recherche Scientifique (FR)
  • HUN-REN Institute of Experimental Medicine (HU)
Corresponding author
Nägerl, U Valentin
Venue
Nature Neuroscience
Published
2014-03-23
Volume
17
Issue
5
Pages
678-685
ISSN
  • 1097-6256 (ISSN-L)
  • 1546-1726
OpenAlex
W2033125075
Cited by
444
References
11
Citations by year
2026: 22 · 2025: 28 · 2024: 31 · 2023: 45 · 2022: 30 · 2021: 35 · 2020: 36 · 2019: 29 · 2018: 43 · 2017: 37 · 2016: 51 · 2015: 41 · 2014: 16
FWCI
22.03
Type
journal article
Language
en
Open access
closed
Locations
  • Nature Neuroscience (publishedVersion)
  • PubMed (publishedVersion)
  • Repository of the Academy's Library (Library of the Hungarian Academy of Sciences) (acceptedVersion)
Funders
Agence Nationale de la Recherche (ANR-10-INBS-0004)
Topics
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neuropharmacology Research
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Biophysics › Advanced Fluorescence Microscopy Techniques
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Memory and Neural Mechanisms
Keywords
dendritic spines, dendritic spine morphology, CA1 pyramidal neurons, long-term potentiation, excitatory postsynaptic potentials, glutamate uncaging, FRAP
MeSH terms
Animals, Animals, Newborn, Bacterial Proteins, Luminescent Proteins, Mice, Transgenic, Neuronal Plasticity, Neurons, Organ Culture Techniques, Synapses, Electric Impedance, Long-Term Potentiation, Patch-Clamp Techniques, Microscopy, Confocal, Statistics, Nonparametric, Photobleaching, Dendritic Spines, Mice, Biophysical Phenomena, CA1 Region, Hippocampal

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