title: Correlates of sleep and waking in Drosophila melanogaster.
abstract: Drosophila exhibits a circadian rest-activity cycle, but it is not known whether fly rest constitutes sleep or is mere inactivity. It is shown here that, like mammalian sleep, rest in Drosophila is characterized by an increased arousal threshold and is homeostatically regulated independently of the circadian clock. As in mammals, rest is abundant in young flies, is reduced in older flies, and is modulated by stimulants and hypnotics. Several molecular markers modulated by sleep and waking in mammals are modulated by rest and activity in Drosophila, including cytochrome oxidase C, the endoplasmic reticulum chaperone protein BiP, and enzymes implicated in the catabolism of monoamines. Flies lacking one such enzyme, arylalkylamine N-acetyltransferase, show increased rest after rest deprivation. These results implicate the catabolism of monoamines in the regulation of sleep and waking in the fly and suggest that Drosophila may serve as a model system for the genetic dissection of sleep.
authors.affiliation: The Neurosciences Institute, 10640 John Jay Hopkins Drive, San Diego, CA 92121, USA.
authors.forename: P J
authors.initials: PJ
authors.lastname: Shaw
authors.forename: C
authors.initials: C
authors.lastname: Cirelli
authors.forename: R J
authors.initials: RJ
authors.lastname: Greenspan
authors.forename: G
authors.initials: G
authors.lastname: Tononi
mesh_terms: D000818:Animals; D001191:Arylamine N-Acetyltransferase / Q000235:genetics / Q000378:metabolism; D001522:Behavior, Animal / Q000187:drug effects; D015306:Biogenic Monoamines / Q000378:metabolism; D002110:Caffeine / Q000494:pharmacology; D002352:Carrier Proteins / Q000235:genetics / Q000378:metabolism; D002940:Circadian Rhythm / Q000502:physiology*; D003577:Cytochrome P-450 Enzyme System / Q000235:genetics / Q000378:metabolism; D000072470:Cytochrome P450 Family 4; D029721:Drosophila Proteins; D004331:Drosophila melanogaster / Q000187:drug effects / Q000235:genetics / Q000502:physiology*; D064429:Fatty Acid Synthases / Q000235:genetics / Q000378:metabolism; D005260:Female; D018628:Gene Dosage; D020869:Gene Expression Profiling; D017344:Genes, Insect; D050883:HSC70 Heat-Shock Proteins; D018840:HSP70 Heat-Shock Proteins; D006706:Homeostasis; D006919:Hydroxyzine / Q000494:pharmacology; D009154:Mutation; D012146:Rest / Q000502:physiology; D012890:Sleep / Q000187:drug effects / Q000502:physiology*; D014158:Transcription, Genetic; D014851:Wakefulness / Q000187:drug effects / Q000502:physiology
chemical_list: D015306:Biogenic Monoamines; D002352:Carrier Proteins; D029721:Drosophila Proteins; D050883:HSC70 Heat-Shock Proteins; D018840:HSP70 Heat-Shock Proteins; D006919:Hydroxyzine; D002110:Caffeine; D003577:Cytochrome P-450 Enzyme System; C102952:Cyp4e2 protein, Drosophila; D000072470:Cytochrome P450 Family 4; D001191:Arylamine N-Acetyltransferase; D064429:Fatty Acid Synthases