Cited by 625Neuroscience and Neuropharmacology ResearchMemory and Neural MechanismsNeural dynamics and brain function

Locally dynamic synaptic learning rules in pyramidal neuron dendrites

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Harvey, Christopher D., Svoboda, Karel·2007·Nature

Abstract

Long-term potentiation (LTP) of synaptic transmission underlies aspects of learning and memory. LTP is input-specific at the level of individual synapses, but neural network models predict interactions between plasticity at nearby synapses. Here we show in mouse hippocampal pyramidal cells that LTP at individual synapses reduces the threshold for potentiation at neighbouring synapses. After input-specific LTP induction by two-photon glutamate uncaging or by synaptic stimulation, subthreshold stimuli, which by themselves were too weak to trigger LTP, caused robust LTP and spine enlargement at neighbouring spines. Furthermore, LTP induction broadened the presynaptic-postsynaptic spike interval for spike-timing-dependent LTP within a dendritic neighbourhood. The reduction in the threshold for LTP induction lasted approximately 10 min and spread over approximately 10 microm of dendrite. These local interactions between neighbouring synapses support clustered plasticity models of memory storage and could allow for the binding of behaviourally linked information on the same dendritic branch.

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  • Rho-Rock and Ras-ERK signaling pathways lower the threshold for LTP in neighboring spines.

    “In addition, Rho-Rock and Ras-ERK signaling pathways lower the threshold for LTP in neighboring spines (Zhu et al., 2002; Harvey and Svoboda, 2007; Harvey et al., 2008; Lee et al., 2009).”

    From Barriers in the brain: resolving dendritic spine morphology and compartmentalization (2014) · cites this paper as Harvey and Svoboda, 2007

    The Abstract reports that LTP at one spine lowered the threshold for potentiation at neighboring spines. The Discussion (page unavailable) proposes a spreading intracellular signaling factor but does not identify Rho–ROCK or Ras–ERK as the pathways responsible. Thus the neighboring-spine effect is supported, but the named mechanism is not. (LLM, conf=0.88)

    Experimental — accuracy not yet measured
  • 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 [246]

    The passage labeled Abstract (page not provided) reports that LTP induction increased spine volume and synaptic current, and says spine volume is associated with the number of AMPA receptors in the postsynaptic density. It does not show that AMPARs were rapidly added to those synapses after stimulation; receptor addition was not directly measured. (LLM, conf=0.83)

    Experimental — accuracy not yet measured
  • LTP can be induced at a single synapse without causing postsynaptic potentiation or depression of neighboring synapses.

    “Experiments using this approach to induce NMDAR-dependent LTP have shown that LTP can be induced at a single synapse without causing postsynaptic potentiation or depression of neighboring synapses (Matsuzaki et al. 2004;Harvey and Svoboda 2007; but see Engert and Bonhoeffer 1997).”

    From NMDA receptor-dependent long-term potentiation and long-term depression (LTP/LTD). (2012) · cites this paper as Harvey and Svoboda 2007

  • Spines associated with synapses that underwent LTP enlarge.

    “Insertion of additional receptors therefore is likely to affect the ultrastructure of the synapse, and in fact, spines associated with synapses that underwent LTP enlarge (Matsuzaki et al. 2004;Harvey and Svoboda 2007;Holtmaat and Svoboda 2009;Kasai et al. 2010).”

    From NMDA receptor-dependent long-term potentiation and long-term depression (LTP/LTD). (2012) · cites this paper as Harvey and Svoboda 2007

  • 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 [246]

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Authors
Harvey, C. D., & Svoboda, K.
Affiliations
Howard Hughes Medical Institute (US)
Corresponding author
Svoboda, Karel
Venue
Nature
Published
2007-12
Volume
450
Issue
7173
Pages
1195-1200
ISSN
  • 0028-0836 (ISSN-L)
  • 1476-4687
OpenAlex
W2118069376
Cited by
625
References
53
Citations by year
2026: 20 · 2025: 22 · 2024: 34 · 2023: 34 · 2022: 22 · 2021: 27 · 2020: 24 · 2019: 31 · 2018: 28 · 2017: 32 · 2016: 36 · 2015: 32 · 2014: 48 · 2013: 43 · 2012: 40
FWCI
15.33
Type
journal article
Language
en
Open access
Locations
  • Nature (publishedVersion)
  • PubMed (publishedVersion)
  • Europe PMC (PubMed Central) (acceptedVersion)
  • PubMed Central (acceptedVersion)
  • Cold Spring Harbor Laboratory Institutional Repository (Cold Spring Harbor Laboratory) (acceptedVersion)
  • RePEc: Research Papers in Economics (submittedVersion)
Funders
Howard Hughes Medical Institute
Topics
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neuropharmacology Research
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Memory and Neural Mechanisms
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Neural dynamics and brain function
Keywords
long-term potentiation, synaptic plasticity, dendritic plasticity, hippocampal pyramidal neurons, dendritic spines, spike-timing-dependent plasticity, synaptic interactions, glutamate uncaging, memory storage, information integration
MeSH terms
Animals, Dendrites, Learning, Models, Neurological, Synapses, Long-Term Potentiation, Pyramidal Cells, Glutamic Acid, Excitatory Postsynaptic Potentials, Mice, In Vitro Techniques

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