Cerebellar Golgi cell models predict dendritic processing and mechanisms of synaptic plasticity.
Journal
PLoS computational biology
ISSN: 1553-7358
Titre abrégé: PLoS Comput Biol
Pays: United States
ID NLM: 101238922
Informations de publication
Date de publication:
12 2020
12 2020
Historique:
received:
05
05
2020
accepted:
13
11
2020
revised:
26
01
2021
pubmed:
31
12
2020
medline:
25
3
2021
entrez:
30
12
2020
Statut:
epublish
Résumé
The Golgi cells are the main inhibitory interneurons of the cerebellar granular layer. Although recent works have highlighted the complexity of their dendritic organization and synaptic inputs, the mechanisms through which these neurons integrate complex input patterns remained unknown. Here we have used 8 detailed morphological reconstructions to develop multicompartmental models of Golgi cells, in which Na, Ca, and K channels were distributed along dendrites, soma, axonal initial segment and axon. The models faithfully reproduced a rich pattern of electrophysiological and pharmacological properties and predicted the operating mechanisms of these neurons. Basal dendrites turned out to be more tightly electrically coupled to the axon initial segment than apical dendrites. During synaptic transmission, parallel fibers caused slow Ca-dependent depolarizations in apical dendrites that boosted the axon initial segment encoder and Na-spike backpropagation into basal dendrites, while inhibitory synapses effectively shunted backpropagating currents. This oriented dendritic processing set up a coincidence detector controlling voltage-dependent NMDA receptor unblock in basal dendrites, which, by regulating local calcium influx, may provide the basis for spike-timing dependent plasticity anticipated by theory.
Identifiants
pubmed: 33378395
doi: 10.1371/journal.pcbi.1007937
pii: PCOMPBIOL-D-20-00755
pmc: PMC7837495
doi:
Substances chimiques
Ion Channels
0
Types de publication
Journal Article
Research Support, Non-U.S. Gov't
Langues
eng
Sous-ensembles de citation
IM
Pagination
e1007937Déclaration de conflit d'intérêts
The authors have declared that no competing interests exist.
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