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• W2000263684 abstract "Astrocytic glutamate transporter-1 (GLT-I) is critical to control the bulk of glutamate uptake and, thus, to regulate synaptic plasticity and excitotoxicity. GLT-I glutamate uptake is driven by the sodium gradient implemented by Na(+)/K(+)-ATPases (NKAs) and the α2 subunit of NKA (NKA-α2) is actually linked to GLT-I to regulate astrocytic glutamate transport. We recently found that adenosine A2A receptors (A2ARs), which control synaptic plasticity and neurodegeneration, regulate glutamate uptake through unknown mechanisms. Here we report that A2AR activation decreases NKA activity selectively in astrocytes to inhibit glutamate uptake. Furthermore, we found a physical association of A2ARs with NKA-α2s in astrocytes, as gauged by coimmunoprecipitation and in situ proximity ligation assays, in the cerebral cortex and striatum, two brain regions where A2ARs inhibit the astrocytic glutamate uptake. Moreover, the selective deletion of A2ARs in astrocytes (using Gfa2-A2AR-KO mice) leads to a concurrent increase of both astrocytic glutamate uptake and NKA-α2 levels and activity in the striatum and cortex. This coupling of astrocytic A2ARs to the regulation of glutamate transport through modulation of NKA-α2 activity provides a novel mechanism linking neuronal activity to ion homeostasis controlling glutamatergic activity, all of which are processes intricately associated with the etiology of several brain diseases." @default.
• W2000263684 created "2016-06-24" @default.
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• W2000263684 date "2013-11-20" @default.
• W2000263684 modified "2023-10-11" @default.
• W2000263684 title "Antagonistic Interaction between Adenosine A_2AReceptors and Na⁺/K⁺-ATPase-α₂Controlling Glutamate Uptake in Astrocytes" @default.
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• W2000263684 doi "https://doi.org/10.1523/jneurosci.1828-13.2013" @default.
• W2000263684 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/3834055" @default.
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