Cited by 252Neuroscience and Neuropharmacology ResearchMemory and Neural MechanismsNeural dynamics and brain function

Synapse specificity of long-term potentiation breaks down at short distances

Engert, Florian, Bonhoeffer, Tobias·1997·Nature

Abstract

Long-term potentiation (LTP), the long-lasting increase in synaptic transmission, has been proposed to be a cellular mechanism essential for learning and memory, neuronal development, and circuit reorganization. In the original theoretical and experimental work it was assumed that only synapses that had experienced concurrent pre- and postsynaptic activity are subject to synaptic modification. It has since been shown, however, that LTP is also expressed in synapses on neighbouring neurons that have not undergone the induction procedure. Yet, it is still believed that this spread of LTP is limited to adjacent postsynaptic cells, and does not occur for synapses on neighbouring input fibres. However, for technical reasons, tests for 'input specificity' were always done for synapses relatively far apart. Here we have used a new local superfusion technique, which allowed us to assess the synaptic specificity of LTP with a spatial resolution of approximately 30 microm. Our results indicate that there is no input specificity at a distance of less than 70 microm. Synapses in close proximity to a site of potentiation are also potentiated regardless of their own history of activation, whereas synapses far away show no potentiation.

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Crossref · 10.1038/40870

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  • 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 Engert and Bonhoeffer 1997

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Authors
Engert, F., & Bonhoeffer, T.
Affiliations
Max Planck Society (DE)
Corresponding author
Bonhoeffer, Tobias
Venue
Nature
Published
1997-07-17
Volume
388
Issue
6639
Pages
279-284
ISSN
  • 0028-0836 (ISSN-L)
  • 1476-4687
OpenAlex
W1598503391
Cited by
252
References
27
Citations by year
2026: 2 · 2025: 3 · 2024: 7 · 2023: 12 · 2022: 6 · 2021: 5 · 2020: 3 · 2019: 4 · 2018: 2 · 2017: 5 · 2016: 5 · 2015: 3 · 2014: 13 · 2013: 6 · 2012: 6
FWCI
5.72
Type
journal article
Language
en
Open access
closed
Locations
  • Nature (publishedVersion)
  • PubMed (publishedVersion)
  • RePEc: Research Papers in Economics (submittedVersion)
Funders
National Institutes of Health
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 specificity, input specificity, synaptic plasticity, learning and memory, postsynaptic neurons
MeSH terms
Animals, Cell Communication, Culture Media, Evoked Potentials, Hippocampus, Models, Neurological, Perfusion, Synapses, Long-Term Potentiation, Pyramidal Cells, Rats, In Vitro Techniques

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