Unacylated ghrelin, leptin, and appetite display diurnal rhythmicity in lean adults

被引:13
|
作者
Templeman, Iain [1 ]
Smith, Harry A. [1 ]
Walhin, Jean-Philippe [1 ]
Middleton, Benita [2 ]
Gonzalez, Javier T. [1 ]
Karagounis, Leonidas G. [3 ,4 ]
Johnston, Jonathan D. [2 ]
Betts, James A. [1 ]
机构
[1] Univ Bath, Ctr Nutr Exercise & Metab, Dept Hlth, Bath, Avon, England
[2] Univ Surrey, Fac Hlth & Med Sci, Sch Biosci & Med, Sect Chronobiol, Guildford, Surrey, England
[3] Nestle Hlth Sci, Translat Res, Vevey, Switzerland
[4] Univ Bern, Inst Social & Prevent Med, Bern, Switzerland
基金
英国生物技术与生命科学研究理事会;
关键词
appetite; circadian rhythms; diurnal; ghrelin; leptin; CIRCADIAN-RHYTHM; FOOD-INTAKE; PLASMA LEPTIN; BODY-WEIGHT; HUNGER; SLEEP; MEAL; INSULIN; OBESE; ENTRAINMENT;
D O I
10.1152/japplphysiol.00920.2020
中图分类号
Q4 [生理学];
学科分类号
071003 ;
摘要
Constant routine and forced desynchrony protocols typically remove the effects of behavioral/environmental cues to examine endogenous circadian rhythms, yet this may not reflect rhythms of appetite regulation in the real world. It is therefore important to understand these rhythms within the same subjects under controlled diurnal conditions of light, sleep, and feeding. Ten healthy adults (9 M/1 F, means +/- SD: age, 30 +/- 10 yr; body mass index, 24.1 +/- 2.7 kg.m(-2)) rested supine in the laboratory for 37 h. All data were collected during the final 24 h of this period (i.e., 0800-0800 h). Participants were fed hourly isocaloric liquid meal replacements alongside appetite assessments during waking before a sleep opportunity from 2200 to 0700 h. Hourly blood samples were collected throughout the 24-h period. Dim light melatonin onset occurred at 2318 +/- 46 min. A diurnal rhythm in mean plasma unacylated ghrelin concentration was identified (P = 0.04), with the acrophase occurring shortly after waking (0819), falling to a nadir in the evening with a relative amplitude of 9%. Plasma leptin concentration also exhibited a diurnal rhythm (P < 0.01), with the acrophase occurring shortly after lights-out (0032 h) and the lowest concentrations at midday. The amplitude for this rhythm was 25%. Diurnal rhythms were established in all dimensions of appetite except for sweet preference (P = 0.29), with both hunger (2103 h) and prospective food consumption (1955 h) reaching their peak in the evening before falling to their nadir shortly after waking. Under controlled diurnal conditions, simultaneous measurement of leptin, unacylated ghrelin, and subjective appetite over a 24-h period revealed rhythmicity in appetite regulation in lean, healthy humans. NEW & NOTEWORTHY Simultaneous assessment of subjective appetite, unacylated ghrelin, and leptin was carried out over a continuous 37-h protocol for the first time under conditions of controlled light, sleep, and feeding in healthy, lean adults. Rhythms were observed in unacylated ghrelin, leptin, and components of subjective appetite, such as hunger, prospective consumption, and fullness. Concurrent measurement of rhythms in these variables is important to fully understand the temporal relationships between components of appetite as well as the influence of diurnal factors such as sleep, light, and feeding.
引用
收藏
页码:1534 / 1543
页数:10
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