General Anaesthesia Shifts the Murine Circadian Clock in a Time-Dependant Fashion
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Date
2021-01-26
Open Access Location
Journal Title
Journal ISSN
Volume Title
Publisher
MDPI (Basel, Switzerland)
Rights
(c) 2021 The Author/s
CC BY 4.0
CC BY 4.0
Abstract
Following general anaesthesia (GA), patients frequently experience sleep disruption and fatigue, which has been hypothesized to result at least in part by GA affecting the circadian clock. Here, we provide the first comprehensive time-dependent analysis of the effects of the commonly administered inhalational anaesthetic, isoflurane, on the murine circadian clock, by analysing its effects on (a) behavioural locomotor rhythms and (b) PER2::LUC expression in the suprachiasmatic nuclei (SCN) of the mouse brain. Behavioural phase shifts elicited by exposure of mice (n = 80) to six hours of GA (2% isoflurane) were determined by recording wheel-running rhythms in constant conditions (DD). Phase shifts in PER2::LUC expression were determined by recording bioluminescence in organotypic SCN slices (n = 38) prior to and following GA exposure (2% isoflurane). Full phase response curves for the effects of GA on behaviour and PER2::LUC rhythms were constructed, which show that the effects of GA are highly time-dependent. Shifts in SCN PER2 expression were much larger than those of behaviour (c. 0.7 h behaviour vs. 7.5 h PER2::LUC). We discuss the implications of this work for understanding how GA affects the clock, and how it may inform the development of chronotherapeutic strategies to reduce GA-induced phase-shifting in patients.
Description
Keywords
PERIOD2::LUC, circadian clock, clock gene, general anaesthesia, phase response curve
Citation
Ludin NM, Orts-Sebastian A, Cheeseman JF, Chong J, Merry AF, Cumin D, Yamazaki S, Pawley MDM, Warman GR. (2021). General Anaesthesia Shifts the Murine Circadian Clock in a Time-Dependant Fashion.. Clocks Sleep. 3. 1. (pp. 87-97).