Neuron-glia metabolic coupling and plasticity.

Détails

ID Serval
serval:BIB_D3007D74BB3E
Type
Article: article d'un périodique ou d'un magazine.
Sous-type
Synthèse (review): revue aussi complète que possible des connaissances sur un sujet, rédigée à partir de l'analyse exhaustive des travaux publiés.
Collection
Publications
Institution
Titre
Neuron-glia metabolic coupling and plasticity.
Périodique
The Journal of experimental biology
Auteur(s)
Magistretti P.J.
ISSN
0022-0949 (Print)
ISSN-L
0022-0949
Statut éditorial
Publié
Date de publication
06/2006
Peer-reviewed
Oui
Volume
209
Numéro
Pt 12
Pages
2304-2311
Langue
anglais
Notes
Publication types: Journal Article ; Research Support, Non-U.S. Gov't ; Review
Publication Status: ppublish
Résumé
The coupling between synaptic activity and glucose utilization (neurometabolic coupling) is a central physiological principle of brain function that has provided the basis for 2-deoxyglucose-based functional imaging with positron emission tomography (PET). Astrocytes play a central role in neurometabolic coupling, and the basic mechanism involves glutamate-stimulated aerobic glycolysis; the sodium-coupled reuptake of glutamate by astrocytes and the ensuing activation of the Na-K-ATPase triggers glucose uptake and processing via glycolysis, resulting in the release of lactate from astrocytes. Lactate can then contribute to the activity-dependent fuelling of the neuronal energy demands associated with synaptic transmission. An operational model, the 'astrocyte-neuron lactate shuttle', is supported experimentally by a large body of evidence, which provides a molecular and cellular basis for interpreting data obtained from functional brain imaging studies. In addition, this neuron-glia metabolic coupling undergoes plastic adaptations in parallel with adaptive mechanisms that characterize synaptic plasticity. Thus, distinct subregions of the hippocampus are metabolically active at different time points during spatial learning tasks, suggesting that a type of metabolic plasticity, involving by definition neuron-glia coupling, occurs during learning. In addition, marked variations in the expression of genes involved in glial glycogen metabolism are observed during the sleep-wake cycle, with in particular a marked induction of expression of the gene encoding for protein targeting to glycogen (PTG) following sleep deprivation. These data suggest that glial metabolic plasticity is likely to be concomitant with synaptic plasticity.

Mots-clé
Animals, Glycogen/metabolism, Humans, Learning/physiology, Memory/physiology, Neuroglia/metabolism, Neuronal Plasticity, Neurons/metabolism
Pubmed
Web of science
Open Access
Oui
Création de la notice
10/03/2008 11:58
Dernière modification de la notice
20/08/2019 16:53
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