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- W2015236906 abstract "Glutamate (Glu) and gamma-aminobutyric acid (GABA) transporters play important roles in regulating neuronal activity. Glu is removed from the extracellular space dominantly by glial transporters. In contrast, GABA is mainly taken up by neurons. However, the glial GABA transporter subtypes share their localization with the Glu transporters and their expression is confined to the same subpopulation of astrocytes, raising the possibility of cooperation between Glu and GABA transport processes.Here we used diverse biological models both in vitro and in vivo to explore the interplay between these processes. We found that removal of Glu by astrocytic transporters triggers an elevation in the extracellular level of GABA. This coupling between excitatory and inhibitory signaling was found to be independent of Glu receptor-mediated depolarization, external presence of Ca(2+) and glutamate decarboxylase activity. It was abolished in the presence of non-transportable blockers of glial Glu or GABA transporters, suggesting that the concerted action of these transporters underlies the process.Our results suggest that activation of Glu transporters results in GABA release through reversal of glial GABA transporters. This transporter-mediated interplay represents a direct link between inhibitory and excitatory neurotransmission and may function as a negative feedback combating intense excitation in pathological conditions such as epilepsy or ischemia." @default.
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- W2015236906 date "2009-09-24" @default.
- W2015236906 modified "2023-10-17" @default.
- W2015236906 title "Glutamate Uptake Triggers Transporter-Mediated GABA Release from Astrocytes" @default.
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- W2015236906 doi "https://doi.org/10.1371/journal.pone.0007153" @default.
- W2015236906 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/2744931" @default.
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