In vivo imaging of the central and peripheral effects of sleep deprivation and suprachiasmatic nuclei lesion on PERIOD-2 protein in mice.

Détails

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Etat: Public
Version: Author's accepted manuscript
ID Serval
serval:BIB_FECE4309AC04
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Institution
Titre
In vivo imaging of the central and peripheral effects of sleep deprivation and suprachiasmatic nuclei lesion on PERIOD-2 protein in mice.
Périodique
Sleep
Auteur(s)
Curie T., Maret S., Emmenegger Y., Franken P.
ISSN
1550-9109 (Electronic)
ISSN-L
0161-8105
Statut éditorial
Publié
Date de publication
2015
Volume
38
Numéro
9
Pages
1381-1394
Langue
anglais
Résumé
STUDY OBJECTIVES: That sleep deprivation increases the brain expression of various clock genes has been well documented. Based on these and other findings we hypothesized that clock genes not only underlie circadian rhythm generation but are also implicated in sleep homeostasis. However, long time lags have been reported between the changes in the clock gene messenger RNA levels and their encoded proteins. It is therefore crucial to establish whether also protein levels increase within the time frame known to activate a homeostatic sleep response. We report on the central and peripheral effects of sleep deprivation on PERIOD-2 (PER2) protein both in intact and suprachiasmatic nuclei-lesioned mice.
DESIGN: In vivo and in situ PER2 imaging during baseline, sleep deprivation, and recovery.
SETTINGS: Mouse sleep-recording facility.
PARTICIPANTS: Per2::Luciferase knock-in mice.
INTERVENTIONS: N/A.
MEASUREMENTS AND RESULTS: Six-hour sleep deprivation increased PER2 not only in the brain but also in liver and kidney. Remarkably, the effects in the liver outlasted those observed in the brain. Within the brain the increase in PER2 concerned the cerebral cortex mainly, while leaving suprachiasmatic nuclei (SCN) levels unaffected. Against expectation, sleep deprivation did not increase PER2 in the brain of arrhythmic SCN-lesioned mice because of higher PER2 levels in baseline. In contrast, liver PER2 levels did increase in these mice similar to the sham and partially lesioned controls.
CONCLUSIONS: Our results stress the importance of considering both sleep-wake dependent and circadian processes when quantifying clock-gene levels. Because sleep deprivation alters PERIOD-2 in the brain as well as in the periphery, it is tempting to speculate that clock genes constitute a common pathway mediating the shared and well-known adverse effects of both chronic sleep loss and disrupted circadian rhythmicity on metabolic health.
Mots-clé
bioluminescence, circadian, homeostasis, clock genes, cerebral cortex, hippocampus, cerebellum, Purkinje cells
Pubmed
Web of science
Open Access
Oui
Création de la notice
30/06/2015 9:45
Dernière modification de la notice
20/08/2019 17:29
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