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• W3158298082 abstract "A precise balance between sleep and wakefulness is essential to sustain a good quality of life and optimal brain function. GABA is known to play a key and conserved role in sleep control, and GABAergic tone should therefore be tightly controlled in sleep circuits. Here we examined the role of the astrocytic GABA transporter (GAT) in sleep regulation using Drosophila melanogaster. We found that a hypomorphic gat mutation (gat33-1) increased sleep amount, decreased sleep latency, and increased sleep consolidation. Interestingly, sleep defects were suppressed when gat33-1 was combined with a mutation disrupting wide-awake (wake), a gene that regulates the cell-surface levels of the GABAA receptor Resistance to Dieldrin (RDL) in the wake-promoting large ventral lateral neurons (l-LNvs). Moreover, RNAi knockdown of rdl and its modulator dnlg4 in these circadian neurons also suppressed gat33-1 sleep phenotypes. Brain immunohistochemistry showed that GAT-expressing astrocytes were located near RDL-positive l-LNvs cell bodies and dendritic processes. We conclude that astrocytic GAT decreases GABAergic tone and RDL activation in arousal promoting LNvs, thus determining proper sleep amount and quality in Drosophila" @default.
• W3158298082 created "2021-05-10" @default.
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• W3158298082 date "2021-04-27" @default.
• W3158298082 modified "2023-10-15" @default.
• W3158298082 title "Astrocytic GABA Transporter controls sleep by modulating GABAergic signaling in Drosophila circadian neurons" @default.
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• W3158298082 doi "https://doi.org/10.1101/2021.04.27.441638" @default.
• W3158298082 hasPublicationYear "2021" @default.
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