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Title: Activity-Dependent Plasticity of Spike Pauses in Cerebellar Purkinje Cells
Authors: Grasselli, Giorgio
He, Qionger
Wan, Vivian
Adelman, John P.
Ohtsuki, Gen  kyouindb  KAKEN_id  orcid https://orcid.org/0000-0003-3004-5886 (unconfirmed)
Hansel, Christian
Author's alias: 大槻, 元
Issue Date: 22-Mar-2016
Publisher: Elsevier
Journal title: Cell Reports
Volume: 14
Issue: 11
Start page: 2546
End page: 2553
Abstract: The plasticity of intrinsic excitability has been described in several types of neurons, but the significance of non-synaptic mechanisms in brain plasticity and learning remains elusive. Cerebellar Purkinje cells are inhibitory neurons that spontaneously fire action potentials at high frequencies and regulate activity in their target cells in the cerebellar nuclei by generating a characteristic spike burst-pause sequence upon synaptic activation. Using patch-clamp recordings from mouse Purkinje cells, we find that depolarization-triggered intrinsic plasticity enhances spike firing and shortens the duration of spike pauses. Pause plasticity is absent from mice lacking SK2-type potassium channels (SK2-/- mice) and in occlusion experiments using the SK channel blocker apamin, while apamin wash-in mimics pause reduction. Our findings demonstrate that spike pauses can be regulated through an activity-dependent, exclusively non-synaptic, SK2 channel-dependent mechanism and suggest that pause plasticity-by altering the Purkinje cell output-may be crucial to cerebellar information storage and learning.
Rights: © 2016 The Authors. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).
URI: http://hdl.handle.net/2433/216329
DOI(Published Version): 10.1016/j.celrep.2016.02.054
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