Physiological synaptic activity and recognition memory require astroglial glutamine.
Animals
Astrocytes
/ metabolism
Cognition
Fluorescent Dyes
/ chemistry
Glutamic Acid
/ chemistry
Glutamine
/ chemistry
Hippocampus
/ cytology
Intravital Microscopy
Male
Mice
Mice, Transgenic
Models, Animal
Molecular Probes
Neurons
/ metabolism
Recognition, Psychology
Rhodamines
/ chemistry
Stereotaxic Techniques
Synaptic Transmission
Journal
Nature communications
ISSN: 2041-1723
Titre abrégé: Nat Commun
Pays: England
ID NLM: 101528555
Informations de publication
Date de publication:
08 02 2022
08 02 2022
Historique:
received:
05
10
2020
accepted:
07
01
2022
entrez:
9
2
2022
pubmed:
10
2
2022
medline:
5
3
2022
Statut:
epublish
Résumé
Presynaptic glutamate replenishment is fundamental to brain function. In high activity regimes, such as epileptic episodes, this process is thought to rely on the glutamate-glutamine cycle between neurons and astrocytes. However the presence of an astroglial glutamine supply, as well as its functional relevance in vivo in the healthy brain remain controversial, partly due to a lack of tools that can directly examine glutamine transfer. Here, we generated a fluorescent probe that tracks glutamine in live cells, which provides direct visual evidence of an activity-dependent glutamine supply from astroglial networks to presynaptic structures under physiological conditions. This mobilization is mediated by connexin43, an astroglial protein with both gap-junction and hemichannel functions, and is essential for synaptic transmission and object recognition memory. Our findings uncover an indispensable recruitment of astroglial glutamine in physiological synaptic activity and memory via an unconventional pathway, thus providing an astrocyte basis for cognitive processes.
Identifiants
pubmed: 35136061
doi: 10.1038/s41467-022-28331-7
pii: 10.1038/s41467-022-28331-7
pmc: PMC8826940
doi:
Substances chimiques
Fluorescent Dyes
0
Molecular Probes
0
Rhodamines
0
Glutamine
0RH81L854J
Glutamic Acid
3KX376GY7L
Types de publication
Journal Article
Research Support, Non-U.S. Gov't
Langues
eng
Sous-ensembles de citation
IM
Pagination
753Commentaires et corrections
Type : CommentIn
Informations de copyright
© 2022. The Author(s).
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