Cited by 114Neuroscience and Neuropharmacology ResearchMemory and Neural MechanismsNeural dynamics and brain function

Short-Term Plasticity at Hippocampal Mossy Fiber Synapses Is Induced by Natural Activity Patterns and Associated with Vesicle Pool Engram Formation

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Vandael, David, Borges-Merjane, Carolina, Zhang, Xiaomin, Jonas, Peter·2020·Neuron

Abstract

Post-tetanic potentiation (PTP) is an attractive candidate mechanism for hippocampus-dependent short-term memory. Although PTP has a uniquely large magnitude at hippocampal mossy fiber-CA3 pyramidal neuron synapses, it is unclear whether it can be induced by natural activity and whether its lifetime is sufficient to support short-term memory. We combined in vivo recordings from granule cells (GCs), in vitro paired recordings from mossy fiber terminals and postsynaptic CA3 neurons, and "flash and freeze" electron microscopy. PTP was induced at single synapses and showed a low induction threshold adapted to sparse GC activity in vivo. PTP was mainly generated by enlargement of the readily releasable pool of synaptic vesicles, allowing multiplicative interaction with other plasticity forms. PTP was associated with an increase in the docked vesicle pool, suggesting formation of structural "pool engrams." Absence of presynaptic activity extended the lifetime of the potentiation, enabling prolonged information storage in the hippocampal network.

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  1. Lashley K.S. In search of the engram Danielli J.F. Brown R. Symposia of the Society of Experimental Biology, No. 4: Physiological Mechanisms in Animal Behavior 1950 Cambridge University Press 454 482

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Authors
Vandael, D., Borges-Merjane, C., Zhang, X., & Jonas, P.
Affiliations
Institute of Science and Technology Austria (AT)
Venue
Neuron
Publisher
Elsevier BV
Published
2020-08
Volume
107
Issue
3
Pages
509-521.e7
ISSN
0896-6273 (ISSN-L)
OpenAlex
W3032084133
Cited by
114
References
80
Citations by year
2026: 16 · 2025: 13 · 2024: 17 · 2023: 24 · 2022: 15 · 2021: 23 · 2020: 6
FWCI
7.79
Type
journal article
Language
en
Open access
Locations
  • Neuron (publishedVersion, cc-by-nc-nd)
  • PubMed Central (publishedVersion, cc-by-nc-nd)
  • PubMed (publishedVersion)
Funders
  • Horizon 2020 (692692)
  • European Research Council
  • Austrian Science Fund (V 739-B27, Z 312-B27)
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
post-tetanic potentiation, short-term plasticity, mossy fiber synapses, hippocampus, CA3 pyramidal cells, granule cells, synaptic vesicle pools, readily releasable pool, docked vesicles, short-term memory, synaptic plasticity, presynaptic activity
MeSH terms
Action Potentials, Animals, Memory, Short-Term, Microscopy, Electron, Neuronal Plasticity, Synapses, Synaptic Vesicles, Pyramidal Cells, Patch-Clamp Techniques, Dentate Gyrus, Mossy Fibers, Hippocampal, Mice, Rats, Synaptic Potentials, CA3 Region, Hippocampal

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