A single bout of mistimed eating is sufficient to cause lasting disruptions in the daily rhythms of metabolism and behavior.
Dharap, S.; Young, M.; Doherty, E. N.; Woodie, L. N.
Show abstract
Synchrony between time-of-day and food intake is critical for maintaining homeostasis while desynchrony between these cues caused by repeated bouts of mistimed eating (ME) is profoundly disruptive to organismal health. However, it is unknown whether the same is true for a single bout of ME. While it is generally accepted that mammals recover quickly from acute alterations in feeding schedule and that chrono-disruption requires chronic, repeated changes, there have been no dedicated investigations of acute ME to suggest otherwise. Therefore, we exposed female and male C57Bl6/J mice to a single bout of ME or timed eating (TE) and continuously measured metabolic and behavioral responses for five days. A single bout of ME was sufficient to disrupt the daily rhythms of metabolic and behavioral outcomes for several days. Energy expenditure and wheel running activity were disrupted and light:dark variation in food intake and macronutrient utilization were altered for several days. Finally, ME changed the amount of time spent resting in for several days post-ME. The TE paradigm disrupted macronutrient utilization for two days but otherwise had no effect on metabolism or behavior. Our results demonstrate that one instance of ME alone has lasting impacts on daily rhythmicity and is an understudied source of circadian disruption.
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