Protocerebral Bridge Neurons That Regulate Sleep in Drosophila melanogaster.

Protocerebral Bridge Neurons That Regulate Sleep in Drosophila melanogaster.
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DOI:
10.3389/fnins.2021.647117
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发表时间:
2021
影响因子:
4.3
通讯作者:
Kume K
Kume K
中科院分区:
医学2区
文献类型:
--
作者:
Tomita J;Ban G;Kato YS;Kume K

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The central complex is one of the major brain regions that control sleep in Drosophila. However, the circuitry details of sleep regulation have not been elucidated yet. Here, we show a novel sleep-regulating neuronal circuit in the protocerebral bridge (PB) of the central complex. Activation of the PB interneurons labeled by the R59E08-Gal4 and the PB columnar neurons with R52B10-Gal4 promoted sleep and wakefulness, respectively. A targeted GFP reconstitution across synaptic partners (t-GRASP) analysis demonstrated synaptic contact between these two groups of sleep-regulating PB neurons. Furthermore, we found that activation of a pair of dopaminergic (DA) neurons projecting to the PB (T1 DA neurons) decreased sleep. The wake-promoting T1 DA neurons and the sleep-promoting PB interneurons formed close associations. Dopamine 2-like receptor (Dop2R) knockdown in the sleep-promoting PB interneurons increased sleep. These results indicated that the neuronal circuit in the PB, regulated by dopamine signaling, mediates sleep-wakefulness.
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