RRC ID 48865
Author King AN, Barber AF, Smith AE, Dreyer AP, Sitaraman D, Nitabach MN, Cavanaugh DJ, Sehgal A.
Title A Peptidergic Circuit Links the Circadian Clock to Locomotor Activity.
Journal Curr Biol
Abstract The mechanisms by which clock neurons in the Drosophila brain confer an ∼24-hr rhythm onto locomotor activity are unclear, but involve the neuropeptide diuretic hormone 44 (DH44), an ortholog of corticotropin-releasing factor. Here we identified DH44 receptor 1 as the relevant receptor for rest:activity rhythms and mapped its site of action to hugin-expressing neurons in the subesophageal zone (SEZ). We traced a circuit that extends from Dh44-expressing neurons in the pars intercerebralis (PI) through hugin+ SEZ neurons to the ventral nerve cord. Hugin neuropeptide, a neuromedin U ortholog, also regulates behavioral rhythms. The DH44 PI-Hugin SEZ circuit controls circadian locomotor activity in a daily cycle but has minimal effect on feeding rhythms, suggesting that the circadian drive to feed can be separated from circadian locomotion. These findings define a linear peptidergic circuit that links the clock to motor outputs to modulate circadian control of locomotor activity.
Volume 27(13)
Pages 1915-1927.e5
Published 2017-7-10
DOI 10.1016/j.cub.2017.05.089
PII S0960-9822(17)30697-8
PMID 28669757
PMC PMC5698909
MeSH Animals Animals, Genetically Modified / genetics Animals, Genetically Modified / physiology Circadian Clocks / genetics* Drosophila Proteins / genetics* Drosophila Proteins / metabolism Drosophila melanogaster / genetics Drosophila melanogaster / physiology* Locomotion / genetics* Male Neuropeptides / genetics* Neuropeptides / metabolism Receptors, Cell Surface / genetics* Receptors, Cell Surface / metabolism
IF 9.601
Times Cited 22
Drosophila 12370R-4