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Liu, Q., Liu, S., Kodama, L., Driscoll, M.R., Wu, M.N. (2012). Two dopaminergic neurons signal to the dorsal fan-shaped body to promote wakefulness in Drosophila.  Curr. Biol. 22(22): 2114--2123.
FlyBase ID
FBrf0220041
Publication Type
Research paper
Abstract

The neuronal circuitry underlying sleep is poorly understood. Although dopamine (DA) is thought to play a key role in sleep/wake regulation, the identities of the individual DA neurons and their downstream targets required for this process are unknown.Here, we identify a DA neuron in each PPL1 cluster that promotes wakefulness in Drosophila. Imaging data suggest that the activity of these neurons is increased during wakefulness, consistent with a role in promoting arousal. Strikingly, these neurons project to the dorsal fan-shaped body, which has previously been shown to promote sleep. The reduced sleep caused by activation of DA neurons can be blocked by loss of DopR, and restoration of DopR expression in the fan-shaped body can rescue the wake-promoting effects of DA in a DopR mutant background.These experiments define a novel arousal circuit at the single-cell level. Because the dorsal fan-shaped body promotes sleep, these data provide a key link between wake and sleep circuits. Furthermore, these findings suggest that inhibition of sleep centers via monoaminergic signaling is an evolutionarily conserved mechanism to promote arousal.

PubMed ID
PubMed Central ID
PMC3505250 (PMC) (EuropePMC)
Related Publication(s)
Note

Dopamine: on the threshold of sleep.
Masek and Keene, 2012, Curr. Biol. 22(22): R949--R951 [FBrf0220054]

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    Language of Publication
    English
    Additional Languages of Abstract
    Parent Publication
    Publication Type
    Journal
    Abbreviation
    Curr. Biol.
    Title
    Current Biology
    Publication Year
    1991-
    ISBN/ISSN
    0960-9822
    Data From Reference
    Alleles (35)
    Genes (12)
    Natural transposons (1)
    Insertions (12)
    Experimental Tools (1)
    Transgenic Constructs (20)
    Transcripts (12)