z-logo
Premium
Homeostatic response to sleep/rest deprivation by constant water flow in larval zebrafish in both dark and light conditions
Author(s) -
Aho Vilma,
Vainikka Maija,
Puttonen Henri A. J.,
Ikonen Heidi M. K.,
Salminen Tiia,
Panula Pertti,
PorkkaHeiskanen Tarja,
Wigren HennaKaisa
Publication year - 2017
Publication title -
journal of sleep research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.297
H-Index - 117
eISSN - 1365-2869
pISSN - 0962-1105
DOI - 10.1111/jsr.12508
Subject(s) - homeostasis , biology , circadian rhythm , sleep deprivation , endocrinology , zebrafish , sleep (system call) , medicine , neuroscience , wakefulness , biochemistry , electroencephalography , computer science , gene , operating system
Summary Sleep—or sleep‐like states—have been reported in adult and larval zebrafish using behavioural criteria. These reversible quiescent periods, displaying circadian rhythmicity, have been used in pharmacological, genetic and neuroanatomical studies of sleep–wake regulation. However, one of the important criteria for sleep, namely sleep homeostasis, has not been demonstrated unequivocally. To study rest homeostasis in zebrafish larvae, we rest‐deprived 1‐week‐old larvae with a novel, ecologically relevant method: flow of water. Stereotyped startle responses to sensory stimuli were recorded after the rest deprivation to study arousal threshold using a high‐speed camera, providing an appropriate time resolution to detect species‐specific behavioural responses occurring in a millisecond time‐scale. Rest‐deprived larvae exhibited fewer startle responses than control larvae during the remaining dark phase and the beginning of the light phase, which can be interpreted as a sign of rest homeostasis—often used as equivalent of sleep homeostasis. To address sleep homeostasis further, we probed the adenosinergic system, which in mammals regulates sleep homeostasis. The adenosine A1 receptor agonist, cyclohexyladenosine, administered during the light period, decreased startle responses and increased immobility bouts, while the adenosine antagonist, caffeine, administered during the dark period, decreased immobility bouts. These results suggest that the regulation of sleep homeostasis in zebrafish larvae consists of the same elements as that of other species.

This content is not available in your region!

Continue researching here.

Having issues? You can contact us here