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  Spike-timing-dependent plasticity in hippocampal CA3 neurons

Astori, S., Pawlak, V., & Köhr, G. (2010). Spike-timing-dependent plasticity in hippocampal CA3 neurons. Journal of Physiology, 588(22), 4475-4488. doi:10.1113/jphysiol.2010.198366.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-002C-511D-0 Version Permalink: http://hdl.handle.net/11858/00-001M-0000-002C-511E-E
Genre: Journal Article
Alternative Title : Spike-timing-dependent plasticity in hippocampal CA3 neurons

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Astori, Simone1, Author              
Pawlak, Verena1, Author              
Köhr, Georg1, Author              
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1Department of Molecular Neurobiology, Max Planck Institute for Medical Research, Max Planck Society, ou_1497704              

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 Abstract: Synaptic plasticity of different inputs converging onto CA3 pyramidal neurons is central to theories of hippocampal function. The mossy fibre (MF) input to these neurons is thought to exhibit plasticity that is in nearly all aspects fundamentally different from plasticity in other brain regions: in particular, when induced by high frequency presynaptic stimulation, plasticity at these synapses is independent of NMDA receptor (NMDAR) activation and presynaptically expressed. Here, we show that different stimulation protocols that depend on the close timing of MF activity and postsynaptic spikes induce bidirectional plasticity in CA3 neurons in 3-week-old rats. Long-term potentiation (LTP) is observed when an excitatory postsynaptic potential (EPSP), evoked by MF stimulation, precedes a single postsynaptic action potential (AP) or a brief AP burst by 10 ms. Instead, timing-dependent long-term depression (LTD) requires the pairing of a single AP to an EPSP with a delay of 30 ms. The pairing of APs to synaptic activity is required for plasticity induction, since the application of unpaired APs or EPSPs did not alter synaptic strength. Furthermore, our results demonstrate that both timing-dependent LTP and LTD critically depend on the activation of NMDARs. Specifically blocking postsynaptic NMDARs prevents plasticity, demonstrating that NMDARs important to spike-timing-dependent plasticity in CA3 neurons are required at postsynaptic sites. In summary, this study shows that the close timing of APs to MF excitatory synaptic input can alter synaptic efficacy in CA3 neurons in a bidirectional manner.

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Language(s): eng - English
 Dates: 2010-08-232010-09-202010-09-272010-11-15
 Publication Status: Published in print
 Pages: 14
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 Table of Contents: -
 Rev. Type: Peer
 Identifiers: eDoc: 664551
DOI: 10.1113/jphysiol.2010.198366
URI: http://www.ncbi.nlm.nih.gov/pubmed/20876200
Other: 7614
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Title: Journal of Physiology
Source Genre: Journal
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Publ. Info: London : Cambridge University Press
Pages: - Volume / Issue: 588 (22) Sequence Number: - Start / End Page: 4475 - 4488 Identifier: ISSN: 0022-3751
CoNE: https://pure.mpg.de/cone/journals/resource/954925334693