Journal
MOLECULAR NUTRITION & FOOD RESEARCH
Volume 63, Issue 24, Pages -Publisher
WILEY
DOI: 10.1002/mnfr.201900867
Keywords
circadian rhythms; gut microbiota; inflammation; late-night eating; lipid metabolism
Categories
Funding
- Scientific Innovation Program for University Students in Zhejiang Province [2018R403026]
- Program for Changjiang Scholars and Innovative Research Team in University [IRT_17R97]
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Scope Irregular eating habits, such as late-night eating, will cause increased risk of obesity and other metabolic diseases. The aim of this study is to elucidate the impacts of late-night eating on physiological function and gut microbiota. Methods and results Male Wistar rats under 16 h/8 h-light/dark cycle are divided into four groups with specific dietary habits, which mimicked breakfast, lunch, dinner, and late-night eating. Late-night eating, including skipping dinner for a night eating (BLN) and skipping breakfast and having a night eating (LDN), causes an increase of body weight, which is associated with decreased physical activity. Additionally, late-night eating results in hepatic lipid accumulation and systemic inflammation in peripheral tissues, compared to those of free feeding (FF) or breakfast, lunch, and dinner (BLD) groups. The phases of key clock genes are similar in FF, BLD, and BLN groups, while LDN feeding causes an overall 4 h phase delay in peripheral tissues. Moreover, late-night eating, especially LDN feeding, results in a significant alternation in the compositions and functions of gut microbiota, which further contributes to the development of metabolic disorder. Conclusion Late-night eating causes physiological dysregulation and misalignment of circadian rhythm, together with microbial dysbiosis.
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