Feeding during the resting phase causes profound changes in physiology and desynchronization between liver and muscle rhythms of rats
文献类型: 外文期刊
第一作者: Opperhuizen, Anne-Loes
作者: Opperhuizen, Anne-Loes;Wang, Dawei;Jansen, Remi;de Vries, Janneke;Kalsbeek, Andries;Wang, Dawei;Foppen, Ewout;Boudzovitch-Surovtseva, Olga;Fliers, Eric;Kalsbeek, Andries
作者机构:
关键词: circadian;energy metabolism;obesity;orexin;shiftwork
期刊名称:EUROPEAN JOURNAL OF NEUROSCIENCE ( 影响因子:3.386; 五年影响因子:3.374 )
ISSN: 0953-816X
年卷期: 2016 年 44 卷 10 期
页码:
收录情况: SCI
摘要: Shiftworkers run an increased risk of developing metabolic disorders, presumably as a result of disturbed circadian physiology. Eating at a time-of-day that is normally dedicated to resting and fasting, may contribute to this association. The hypothalamus is the key brain area that integrates different inputs, including environmental time information from the central biological clock in the suprachiasmatic nuclei, with peripheral information on energy status to maintain energy homeostasis. The orexin system within the lateral hypothalamus is an important output of the suprachiasmatic nuclei involved in the control of sleep/wake behavior and glucose homeostasis, among other functions. In this study, we tested the hypothesis that feeding during the rest period disturbs the orexin system as a possible underlying contributor to metabolic health problems. Male Wistar rats were exposed to an 8-week protocol in which food was available adlibitum for 24-h, for 12-h during the light phase (i.e., unnatural feeding time) or for 12-h during the dark phase (i.e., restricted feeding, but at the natural time-of-day). Animals forced to eat at an unnatural time, i.e., during the light period, showed no changes in orexin and orexin-receptor gene expression in the hypothalamus, but the rhythmic expression of clock genes in the lateral hypothalamus was absent in these animals. Light fed animals did show adverse changes in whole-body physiology and internal desynchronization of muscle and liver clock and metabolic gene expression. Eating at the wrong' time-of-day thus causes internal desynchronization at different levels, which in the long run may disrupt body physiology.
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