Abstract
In the fruit fly, Drosophila melanogaster, rest shares features with mammalian sleep, including prolonged immobility, decreased sensory responsiveness and a homeostatic rebound after deprivation. To understand the molecular regulation of sleep-like rest, we investigated the involvement of a candidate gene, cAMP response-element binding protein (CREB). The duration of rest was inversely related to cAMP signaling and CREB activity. Acutely blocking CREB activity in transgenic flies did not affect the clock, but increased rest rebound. CREB mutants also had a prolonged and increased homeostatic rebound. In wild types, in vivo CREB activity increased after rest deprivation and remained elevated for a 72-hour recovery period. These data indicate that cAMP signaling has a non-circadian role in waking and rest homeostasis in Drosophila.
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Acknowledgements
This work was supported by grants (R01-HL-59649, SCOR-HL-60287) from the National Institutes of Heart, Lung and Blood (J.C.H., J.C.-P.Y.) and the Howard Hughes Medical Institute (A.S.). We thank J. Cater for biostatistical assistance and A.I. Pack for advice and support.
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Hendricks, J., Williams, J., Panckeri, K. et al. A non-circadian role for cAMP signaling and CREB activity in Drosophila rest homeostasis. Nat Neurosci 4, 1108–1115 (2001). https://doi.org/10.1038/nn743
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DOI: https://doi.org/10.1038/nn743
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