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Shriane AE, Rigney G, Ferguson SA, Bin YS, Vincent GE. Healthy sleep practices for shift workers: consensus sleep hygiene guidelines using a Delphi methodology. Sleep 2023; 46:zsad182. [PMID: 37429599 PMCID: PMC10710992 DOI: 10.1093/sleep/zsad182] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2022] [Revised: 06/19/2023] [Indexed: 07/12/2023] Open
Abstract
STUDY OBJECTIVES The unique requirements of shift work, such as sleeping and working at variable times, mean that current sleep hygiene guidelines may be inappropriate for shift workers. Current guidelines may also contradict fatigue management advice (e.g. advising against daytime napping). The present study utilized a Delphi methodology to determine expert opinion regarding the applicability of current guidelines for shift workers, the appropriateness of the term "sleep hygiene," and develop tailored guidelines for shift workers. METHODS The research team reviewed current guidelines and existing evidence to draft tailored guidelines. Seventeen individual guidelines, covering sleep scheduling, napping, sleep environment, bedtime routine, substances, light exposure, diet, and exercise were drafted. Experts from sleep, shift work, and occupational health fields (n = 155) were invited to review the draft guidelines using a Delphi methodology. In each round, experts voted on individual guidelines, with 70% agreement considered consensus. Where consensus was not reached, written feedback from experts was discussed and incorporated into subsequent iterations. RESULTS Of the experts invited, 68 (44%) agreed to participate, with 55 (35%) completing the third (final) round. Most experts (84%) agreed that tailored guidelines were required for shift workers. Consensus was reached on all guidelines after three rounds. One additional guideline (sleep inertia) and an introductory statement were developed, resulting in a final set of 18 individual guidelines, termed "healthy sleep practices for shift workers." CONCLUSIONS This is the first study to develop tailored sleep hygiene guidelines for shift workers. Future research should investigate the acceptability and effectiveness of these guidelines amongst shift workers.
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Affiliation(s)
- Alexandra E Shriane
- Appleton Institute, School of Health, Medical and Applied Sciences, Central Queensland University, Adelaide, SA, Australia
| | - Gabrielle Rigney
- Appleton Institute, School of Health, Medical and Applied Sciences, Central Queensland University, Adelaide, SA, Australia
| | - Sally A Ferguson
- Appleton Institute, School of Health, Medical and Applied Sciences, Central Queensland University, Adelaide, SA, Australia
| | - Yu Sun Bin
- Charles Perkins Centre, University of Sydney, Sydney, NSW, Australia
- Northern Clinical School, Sydney Medical School, Faculty of Medicine and Health, University of Sydney, Sydney, NSW, Australia
| | - Grace E Vincent
- Appleton Institute, School of Health, Medical and Applied Sciences, Central Queensland University, Adelaide, SA, Australia
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Bernardes da Cunha N, Teixeira GP, Madalena Rinaldi AE, Azeredo CM, Crispim CA. Late meal intake is associated with abdominal obesity and metabolic disorders related to metabolic syndrome: A chrononutrition approach using data from NHANES 2015-2018. Clin Nutr 2023; 42:1798-1805. [PMID: 37586316 DOI: 10.1016/j.clnu.2023.08.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2023] [Revised: 07/05/2023] [Accepted: 08/06/2023] [Indexed: 08/18/2023]
Abstract
BACKGROUND & AIMS Chrononutrition is an emerging area that suggests that late eating time is associated with poor nutritional and metabolic outcomes. However, epidemiological studies are scarce on this topic. The aim of this study was to characterize the chrononutrition patterns in a large and representative US population (NHANES 2015-2016 and 2017-2018) of adults and elderly and investigate their association with obesity and metabolic disorders that make up the metabolic syndrome. METHODS A total of 7379 adults and elderly individuals were included in the analysis. Meal timing data were collected through two 24-h dietary recalls in both cycles. Poisson regression adjusted for confounders was used to evaluate the association between chrononutrition variables (eating duration and tertiles of first and last meal timing, eating midpoint and eating occasions) and obesity, abdominal obesity and metabolic parameters from metabolic syndrome. RESULTS Adults with a longer eating duration (>12 h) had a higher prevalence of abdominal obesity (IRR, 1.15; 95% CI, 1.03-1.28) when compared with those who ate their meals in a shorter eating duration (≤12 h). In addition, adults in the third tertile of the time of the last meal (mean 22:03) had a higher prevalence of abdominal obesity (IRR, 1.12; 95% CI, 1.01-1.25) compared to first tertile. Adults with later eating midpoints (second and third tertile) had a higher prevalence of elevated fasting glucose (IRR, 1.30; 95% CI, 1.07-1.59 and IRR, 1.65; 95% CI, 1.22-2.22, respectively). Among the elderly, participants with a longer eating duration (>12 h) had a higher prevalence of elevated triglycerides (IRR, 2.74; 95% CI, 1.25-5.96) when compared with those elderly who ate their meals in a shorter eating duration (≤12 h). CONCLUSION These findings suggest that a long eating duration and late first and last meal timing are chrononutrition patterns associated with cardiometabolic risks in free-living Americans.
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Affiliation(s)
- Nayara Bernardes da Cunha
- Chrononutrition Research Group, School of Medicine, Federal University of Uberlândia, Uberlândia, Minas Gerais, Brazil; Graduate Program in Health Sciences, Faculty of Medicine, Federal University of Uberlândia, Minas Gerais, Brazil
| | - Gabriela Pereira Teixeira
- Chrononutrition Research Group, School of Medicine, Federal University of Uberlândia, Uberlândia, Minas Gerais, Brazil; Graduate Program in Health Sciences, Faculty of Medicine, Federal University of Uberlândia, Minas Gerais, Brazil
| | - Ana Elisa Madalena Rinaldi
- Graduate Program in Health Sciences, Faculty of Medicine, Federal University of Uberlândia, Minas Gerais, Brazil
| | - Catarina Machado Azeredo
- Graduate Program in Health Sciences, Faculty of Medicine, Federal University of Uberlândia, Minas Gerais, Brazil
| | - Cibele Aparecida Crispim
- Chrononutrition Research Group, School of Medicine, Federal University of Uberlândia, Uberlândia, Minas Gerais, Brazil; Graduate Program in Health Sciences, Faculty of Medicine, Federal University of Uberlândia, Minas Gerais, Brazil.
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3
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Marjot T, Tomlinson JW, Hodson L, Ray DW. Timing of energy intake and the therapeutic potential of intermittent fasting and time-restricted eating in NAFLD. Gut 2023; 72:1607-1619. [PMID: 37286229 PMCID: PMC10359613 DOI: 10.1136/gutjnl-2023-329998] [Citation(s) in RCA: 17] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/03/2023] [Accepted: 05/14/2023] [Indexed: 06/09/2023]
Abstract
Non-alcoholic fatty liver disease (NAFLD) represents a major public health concern and is associated with a substantial global burden of liver-related and cardiovascular-related morbidity and mortality. High total energy intake coupled with unhealthy consumption of ultra-processed foods and saturated fats have long been regarded as major dietary drivers of NAFLD. However, there is an accumulating body of evidence demonstrating that the timing of energy intake across a the day is also an important determinant of individual risk for NAFLD and associated metabolic conditions. This review summarises the available observational and epidemiological data describing associations between eating patterns and metabolic disease, including the negative effects of irregular meal patterns, skipping breakfast and night-time eating on liver health. We suggest that that these harmful behaviours deserve greater consideration in the risk stratification and management of patients with NAFLD particularly in a 24-hour society with continuous availability of food and with up to 20% of the population now engaged in shiftwork with mistimed eating patterns. We also draw on studies reporting the liver-specific impact of Ramadan, which represents a unique real-world opportunity to explore the physiological impact of fasting. By highlighting data from preclinical and pilot human studies, we present a further biological rationale for manipulating timing of energy intake to improve metabolic health and discuss how this may be mediated through restoration of natural circadian rhythms. Lastly, we comprehensively review the landscape of human trials of intermittent fasting and time-restricted eating in metabolic disease and offer a look to the future about how these dietary strategies may benefit patients with NAFLD and non-alcoholic steatohepatitis.
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Affiliation(s)
- Thomas Marjot
- Oxford Centre for Diabetes Endocrinology and Metabolism, NIHR Oxford Biomedical Research Centre, Churchill Hospital, University of Oxford, Oxford, UK
- Oxford Liver Unit, John Radcliffe Hospital, Oxford University Hospitals NHS Foundation Trust, Oxford, UK
| | - Jeremy W Tomlinson
- Oxford Centre for Diabetes Endocrinology and Metabolism, NIHR Oxford Biomedical Research Centre, Churchill Hospital, University of Oxford, Oxford, UK
| | - Leanne Hodson
- Oxford Centre for Diabetes Endocrinology and Metabolism, NIHR Oxford Biomedical Research Centre, Churchill Hospital, University of Oxford, Oxford, UK
| | - David W Ray
- Oxford Centre for Diabetes Endocrinology and Metabolism, NIHR Oxford Biomedical Research Centre, Churchill Hospital, University of Oxford, Oxford, UK
- Sir Jules Thorn Sleep and Circadian Neuroscience Institute, University of Oxford, Oxford, UK
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Kwak J, Jang KA, Kim HR, Kang MS, Lee KW, Shin D. Identifying the Associations of Nightly Fasting Duration and Meal Timing with Type 2 Diabetes Mellitus Using Data from the 2016–2020 Korea National Health and Nutrition Survey. Nutrients 2023; 15:nu15061385. [PMID: 36986116 PMCID: PMC10057513 DOI: 10.3390/nu15061385] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2023] [Revised: 03/06/2023] [Accepted: 03/11/2023] [Indexed: 03/17/2023] Open
Abstract
Nightly fasting duration and meal timing are associated with metabolic disorders. This study aimed to investigate the relationships of nightly fasting duration and meal timing with type 2 diabetes mellitus (T2DM) using data from the 2016–2020 Korea National Health and Nutrition Survey. A total of 22,685 adults ≥ 19 years were included in this study. Nightly fasting duration was calculated by subtracting the interval between the day’s first and last meal eating times from 24 h. The meal timing were analyzed using various parameters, including the times of the first and last eating episodes and the percentage of energy intake during the morning (05:00 to 9:00 a.m.), evening (06:00 to 09:00 p.m.), and night (after 09:00 p.m.). Men who fasted nightly for ≥ 12 h had lower odds of T2DM (odds ratio (OR): 0.86; 95% confidence interval (CI): 0.75–0.99) than those who fasted for < 12 h. Individuals who had their last meal after 09:00 p.m. had higher odds of T2DM (OR: 1.19, 95% CI: 1.03–1.38, men; OR: 1.19, 95% CI: 1.01–1.40, women). Additionally, the percentage of energy intake during the evening was associated with increased odds of T2DM (OR: 1.41, 95% CI: 1.08–1.84, men; OR: 1.32, 95% CI: 1.02–1.70, women). These findings emphasize the importance of nightly fasting duration and meal timing in modulating the risk of T2DM among Korean adults.
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Affiliation(s)
- Junkyung Kwak
- Department of Food and Nutrition, Inha University, Incheon 22212, Republic of Korea
| | - Kyeong-A Jang
- Department of Agro-Food Resources, National Institute of Agricultural Sciences, Rural Development Administration, Wanju 55365, Republic of Korea
| | - Haeng-Ran Kim
- Department of Agro-Food Resources, National Institute of Agricultural Sciences, Rural Development Administration, Wanju 55365, Republic of Korea
| | - Min-Sook Kang
- Department of Agro-Food Resources, National Institute of Agricultural Sciences, Rural Development Administration, Wanju 55365, Republic of Korea
| | - Kyung Won Lee
- Department of Home Economics Education, Korea National University of Education, Cheongju 28173, Republic of Korea
- Correspondence: (K.W.L.); (D.S.); Tel.: +82-43-230-3746 (K.W.L.); +82-32-860-8123 (D.S.)
| | - Dayeon Shin
- Department of Food and Nutrition, Inha University, Incheon 22212, Republic of Korea
- Correspondence: (K.W.L.); (D.S.); Tel.: +82-43-230-3746 (K.W.L.); +82-32-860-8123 (D.S.)
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Clark AB, Coates AM, Davidson ZE, Bonham MP. Dietary Patterns under the Influence of Rotational Shift Work Schedules: A Systematic Review and Meta-Analysis. Adv Nutr 2023; 14:295-316. [PMID: 36805319 DOI: 10.1016/j.advnut.2023.01.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2022] [Revised: 12/08/2022] [Accepted: 01/18/2023] [Indexed: 02/04/2023] Open
Abstract
Workers employed in rotating shift schedules are at a higher metabolic risk compared with those in regular day and fixed shift schedules; however, the contribution of diet is unclear. This systematic review aimed to investigate how rotating shift work schedules affect dietary energy intake and dietary patterns compared with regular day and fixed shift schedules. In addition, intraperson energy intake and dietary pattern comparisons within rotating shift schedules were investigated. Database searches were conducted on MEDLINE, Cochrane, CINAHL, PSYCinfo, EMBASE, and Scopus, in addition to manual search of bibliographic references, to identify articles. Two separate meta-analyses compared dietary intake between day work and rotating shift work schedules and within the rotational shift work group (morning/day and night shifts). Differences in dietary patterns were synthesized narratively. Thirty-one studies (n = 18,196 participants) were included in the review, and meta-analyses were conducted with 24-hour mean energy intake data from 18 (n = 16,633 participants) and 7 (n = 327 participants) studies, respectively. The average 24-hour energy intake of rotating shift workers was significantly higher than that of workers in regular daytime schedules [weighted mean difference (WMD): 264 kJ; 95% confidence interval (CI): 70, 458 kJ; P < 0.008; I2 = 63%]. However, the mean difference in 24-hour energy intake between morning/day shifts compared with night shifts within rotational shift schedules was not statistically significant (WMD: 101 kJ; 95% CI: -651, 852 kJ; P = 0.79; I2 = 77%). Dietary patterns of rotating shift workers were different from those of day workers, showing irregular and more frequent meals, increased snacking/eating at night, consumption of fewer core foods, and more discretionary foods. This review highlights that dietary intake in rotational shift workers is potentially higher in calories and features different eating patterns as a consequence of rotating shift work schedules. This review was registered at PROSPERO as ID 182507.
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Affiliation(s)
- Angela B Clark
- Department of Nutrition, Dietetics and Food, Monash University, Melbourne, Victoria, Australia.
| | - Alison M Coates
- Alliance for Research in Exercise, Nutrition and Activity, University of South Australia, Adelaide, South Australia, Australia
| | - Zoe E Davidson
- Department of Nutrition, Dietetics and Food, Monash University, Melbourne, Victoria, Australia
| | - Maxine P Bonham
- Department of Nutrition, Dietetics and Food, Monash University, Melbourne, Victoria, Australia
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6
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Meal timing variability of rotating shift workers throughout a complete shift cycle and its effect on daily energy and macronutrient intake: a field study. Eur J Nutr 2023; 62:1707-1718. [PMID: 36797507 DOI: 10.1007/s00394-023-03106-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2022] [Accepted: 01/31/2023] [Indexed: 02/18/2023]
Abstract
PURPOSE To evaluate the meal timing variability of rotating shift workers throughout a complete shift schedule and its effect on daily energy and macronutrient intake. METHODS Thirty male shift-workers from a mining company were evaluated in a complete rotation shift cycle over 240 consecutive hours (10 days; two days of morning shifts, two days of evening shifts, 24 h free, two days of night shifts and three days off). Food intake related variables [meal timing, energy (kcal) and macronutrient intake (%)] were assessed by 24 h recall by a trained nutritionist. Mixed models were used to analyze the variation in meal timing and energy and macronutrient intake throughout the shift cycle, as well as the interaction between shift and time ranges (00:00-03:59, 04:00-07:59, 08:00-11:59, 12:00-15:59, 16:00-19:59, 20:00-23:59). RESULTS The first meal of the day was earlier on night shifts [D6 (3:44 ± 0:33) and D7 (5:52 ± 0:42)] compared to the other shifts (p < 0.001), except for D4 (evening shift; 5:51 ± 0:47) versus D7 (p = 0.999). Night shifts also showed a shorter night fasting (D5-D6, 9.3 h; D6-D7, 9.6 h) than most other nights (p < 0.05), except for the fasting between D1-D2 (11.3 h) and D3-D4 (11.2 h) (p > 0.05). There was no difference in 24 h energy intake throughout the shift cycle (p = 0.065). The analysis of interaction between shift and time ranges showed that night shift (D6) presented a higher intake of energy (441.5 ± 48.4 kcal), percentage of energy (D6: 17.8 ± 1.8%), fat (17.6 ± 2.0%), carbohydrate (17.0 ± 1.7%) and protein (16.4 ± 1.8%) between 00:00 and 03:59 compared with the other shift days (p < 0.05). CONCLUSION Night shifts seem to contribute to a longer eating window than other shifts. Moreover, there is a higher energy and macronutrients intake during night shifts, which reduces the night fast period and could have implications for metabolic dysregulation.
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7
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Huggins CE, Jong J, Leung GKW, Page S, Davis R, Bonham MP. Shift workers’ perceptions and experiences of adhering to a nutrition intervention at night whilst working: a qualitative study. Sci Rep 2022; 12:15487. [PMID: 36109573 PMCID: PMC9477878 DOI: 10.1038/s41598-022-19582-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2022] [Accepted: 08/31/2022] [Indexed: 11/09/2022] Open
Abstract
AbstractThis study explored the feasibility of implementing a meal timing intervention during night shift work. Data were collected via semi-structured interviews. Interviews were coded inductively by two researchers independently, then three major themes were collaboratively developed. Subthemes from each major theme were mapped to the theoretical domains framework and the Capability Opportunity Motivation model of behaviour change. Seventeen night shift workers (rotating or permanent) aged between 25 and 65 years were interviewed. Participants predominately worked as health professionals. The feasibility of a simple meal timing intervention to avoid eating between 1 and 6 am on night shift is largely affected by three major influences (1) physical and emotional burden of shift work which drives food temptations; (2) the workplace context including the meal break environment, social and cultural context at work, and break scheduling; and (3) motivation of the individual. Facilitators to avoiding eating at night were, keeping busy, having co-worker support, management support, education of health benefits and/or belief that the intervention was health promoting. The barriers to avoiding eating at night were the emotional and physical toll of working at night leading to comfort eating and not having rest areas away from food environments. To support night shift workers with changing timing of meals, interventions at work should target both individual and organisational level behaviour change.
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8
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Zhu L, Zhang Y, Song L, Zhou Z, Wang J, Wang Y, Sang L, Xiao J, Lian Y. The relationships of shift work, hair cortisol concentration and dyslipidaemia: a cohort study in China. BMC Public Health 2022; 22:1634. [PMID: 36038856 PMCID: PMC9426255 DOI: 10.1186/s12889-022-14038-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2022] [Accepted: 08/19/2022] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Currently, cardiovascular disease is the leading cause of death, and dyslipidaemia is an independent and modifiable major risk factor. Previous studies on shift work with dyslipidaemia and hair cortisol concentration (HCC) have yielded conflicting results. The aim of this study was to clarify the association between shift work, dyslipidaemia, and HCC. We further explored the mediating effect of HCC. METHODS In this cohort study, baseline data were collected from participants in May 2013. The cohort included 2170 participants- 1348 shift workers and 822 non-shift workers- who were followed up for 6 years with four questionnaire surveys from July 2014, October 2015, and May to December 2019. Hair samples were collected from 340 participants during the baseline period for HCC testing with an automated radioimmunoassay. Dyslipidaemia was defined using the National Cholesterol Education Program Adult Treatment Panel III diagnostic criteria. RESULTS Shift workers had a higher risk of dyslipidaemia than workers on the fixed day shift (two-shift RR = 1.408, 95% CI: 1.102-1.798; three-shift RR = 1.478, 95% CI: 1.134-1.926; four-shift RR = 1.589, 95% CI: 1.253-2.015). Additionally, shift workers had higher HCC levels than fixed day shift workers, with geometric mean concentration (GMC) ± geometric standard difference (GSD) = 2.625 ± 2.012 ng/g, two-shift GMC ± GSD = 3.487 ± 1.930 ng/g, three-shift GMC ± GSD = 2.994 ± 1.813 ng/g, and four-shift GMC ± GSD = 3.143 ± 1.720 ng/g. High HCC was associated with a high incidence of dyslipidaemia. After controlling for confounding factors, this study showed that HCC played a role in mediating dyslipidaemia in shift workers and accounted for 16.24% of the effect. CONCLUSIONS Shift work was linked to increased risk of dyslipidaemia compared with fixed day shift work. Higher HCC was associated with a higher prevalence of dyslipidaemia. HCC had a significant mediating effect on dyslipidaemia in shift workers.
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Affiliation(s)
- Lejia Zhu
- Department of Epidemiology and Medical Statistics, School of Public Health, Nantong University, Se Yuan Road, No. 9, Nantong, 226001, Jiangsu, China
| | - Yu Zhang
- Department of Epidemiology and Medical Statistics, School of Public Health, Nantong University, Se Yuan Road, No. 9, Nantong, 226001, Jiangsu, China
| | - Lin Song
- Department of Epidemiology and Medical Statistics, School of Public Health, Nantong University, Se Yuan Road, No. 9, Nantong, 226001, Jiangsu, China
| | - Ziqi Zhou
- Department of Epidemiology and Medical Statistics, School of Public Health, Nantong University, Se Yuan Road, No. 9, Nantong, 226001, Jiangsu, China
| | - Jin Wang
- Department of Epidemiology and Medical Statistics, School of Public Health, Nantong University, Se Yuan Road, No. 9, Nantong, 226001, Jiangsu, China
| | - Yangmei Wang
- Department of Epidemiology and Medical Statistics, School of Public Health, Nantong University, Se Yuan Road, No. 9, Nantong, 226001, Jiangsu, China
| | - Lingli Sang
- Department of Epidemiology and Medical Statistics, School of Public Health, Nantong University, Se Yuan Road, No. 9, Nantong, 226001, Jiangsu, China
| | - Jing Xiao
- Department of Epidemiology and Medical Statistics, School of Public Health, Nantong University, Se Yuan Road, No. 9, Nantong, 226001, Jiangsu, China
| | - Yulong Lian
- Department of Epidemiology and Medical Statistics, School of Public Health, Nantong University, Se Yuan Road, No. 9, Nantong, 226001, Jiangsu, China.
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Timmer R, Bogaardt L, Brummelhuis WJ, van Oostrom CT, van Kerkhof LWM, Wong A, de Valk HW, Ocké MC, van der Maaden T, Dollé MET. A randomized crossover trial assessing time of day snack consumption and resulting postprandial glycemic response in a real-life setting among healthy adults. Chronobiol Int 2022; 39:1329-1339. [PMID: 36004426 DOI: 10.1080/07420528.2022.2105230] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
The postprandial glycemic response is an important metabolic health factor, which, from laboratory studies, is known to change from low to high over the course of the day, and from which negative health outcomes have been linked to nightly eating. We applied interstitial continuous glucose monitoring to examine the glycemic response to a standardized carbohydrate-rich snack (198 kcal) across the day in a real-life setting. Twenty-four healthy participants (12 men, 12 women, 27-61 y old) consumed the snack nine times during 6 d in a crossover design, altering the time of consumption between morning, afternoon and evening. The snack was consumed in the participant's own environment with a preceding fast of at least 2.5 h between their customary main meals and practices. Linear mixed models were used with fixed effect of timing, and participant as random effect, to assess incremental area under the curve, peak value and time-to-peak of the glycemic response. Overall, the highest glycemic excursions were observed in the morning, while a more dampened but prolonged response was observed in the evening. These findings do not concur with previously published laboratory studies. This implies that results obtained under controlled experimental conditions in laboratories cannot be generalized directly to predict chrononutritional effects on the glycemic response in healthy individuals and their daily routines.
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Affiliation(s)
- Ruth Timmer
- Centre for Health Protection, National Institute for Public Health and the Environment (RIVM), Bilthoven, The Netherlands.,Centre for Nutrition, Prevention and Health Services, National Institute for Public Health and the Environment (RIVM), Bilthoven, The Netherlands
| | - Laurens Bogaardt
- Centre for Nutrition, Prevention and Health Services, National Institute for Public Health and the Environment (RIVM), Bilthoven, The Netherlands
| | - Walter J Brummelhuis
- Centre for Health Protection, National Institute for Public Health and the Environment (RIVM), Bilthoven, The Netherlands
| | - Conny T van Oostrom
- Centre for Health Protection, National Institute for Public Health and the Environment (RIVM), Bilthoven, The Netherlands
| | - Linda W M van Kerkhof
- Centre for Health Protection, National Institute for Public Health and the Environment (RIVM), Bilthoven, The Netherlands
| | - Albert Wong
- Centre for Nutrition, Prevention and Health Services, National Institute for Public Health and the Environment (RIVM), Bilthoven, The Netherlands
| | - Harold W de Valk
- Internal Medicine, University Medical Center Utrecht, Utrecht, The Netherlands
| | - Marga C Ocké
- Centre for Nutrition, Prevention and Health Services, National Institute for Public Health and the Environment (RIVM), Bilthoven, The Netherlands.,Division of Human Nutrition and Health, Wageningen University and Research, Wageningen, The Netherlands
| | - Tessa van der Maaden
- Centre for Health Protection, National Institute for Public Health and the Environment (RIVM), Bilthoven, The Netherlands
| | - Martijn E T Dollé
- Centre for Health Protection, National Institute for Public Health and the Environment (RIVM), Bilthoven, The Netherlands
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Makowski MS, Trockel MT, Menon NK, Wang H, Katznelson L, Shanafelt TD. Performance Nutrition for Physician Trainees Working Overnight Shifts: A Randomized Controlled Trial. ACADEMIC MEDICINE : JOURNAL OF THE ASSOCIATION OF AMERICAN MEDICAL COLLEGES 2022; 97:426-435. [PMID: 34753859 DOI: 10.1097/acm.0000000000004509] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
PURPOSE To compare acute effects of 2 dietary interventions with usual dietary habits on physician trainees' alertness during overnight shifts. METHOD This registered, controlled, block randomized crossover trial (NCT03698123) was conducted between October 2018 and May 2019 at Stanford Medicine. Physician trainees working at least 3 overnight shifts during a 1-week period were recruited. During the first night, participants followed their usual dietary habits. During the intervention nights (low carbohydrate-to-protein ratio and high carbohydrate-to-protein ratio interventions), participants received healthy dinners, snacks, water, and, upon request, caffeinated beverages, at the beginning of their shifts and were instructed to eat meals before 10 pm. The sequence of interventions on the second and third nights were block randomized across study weeks. Outcome measures (a priori) were overnight changes in validated measures of specific neurobehavioral dimensions: psychomotor vigilance, sensory-motor speed, working memory, and risk decision making, as well as self-reported sleepiness and work exhaustion. RESULTS Sixty-one physician trainees participated in this study. Compared with usual dietary habits, overnight changes in psychomotor vigilance scores (scale 0-1,000) improved by 51.02 points (95% CI: 12.08, 89.96) and sleepiness (scale 1-7) improved by 0.69 points (95% CI: 0.33, 1.05) under the low carbohydrate-to-protein ratio intervention. Compared with usual dietary habits, overnight changes in sleepiness (scale 1-7) improved by 0.61 points (95% CI: 0.25, 0.96) under the high carbohydrate-to-protein ratio intervention. Neither intervention had beneficial effects relative to usual dietary habits with respect to sensory-motor speed, working memory, risk decision making, or work exhaustion. There were no differences in outcomes between low carbohydrate-to-protein ratio and high carbohydrate-to-protein ratio interventions. CONCLUSIONS Dietary interventions may mitigate negative effects of physician trainee sleep deprivation during overnight shifts. Future studies are warranted to further examine the effectiveness of nutritional strategies on physician alertness during overnight shifts.
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Affiliation(s)
- Maryam S Makowski
- M.S. Makowski is clinical assistant professor, Department of Psychiatry and Behavioral Sciences, Stanford University School of Medicine, Stanford, California; ORCID: https://orcid.org/0000-0003-0823-5376
| | - Mickey T Trockel
- M.T. Trockel is clinical professor, Department of Psychiatry and Behavioral Sciences, Stanford University School of Medicine, Stanford, California; ORCID: https://orcid.org/0000-0001-7191-5791
| | - Nikitha K Menon
- N.K. Menon is social science research professional, Department of Psychiatry and Behavioral Sciences, Stanford University School of Medicine, Stanford, California; ORCID: https://orcid.org/0000-0001-6443-1561
| | - Hanhan Wang
- H. Wang is a biostatistician, Stanford Medicine WellMD and WellPhD Center, Stanford University School of Medicine, Stanford, California; ORCID: https://orcid.org/0000-0003-4076-3443
| | - Laurence Katznelson
- L. Katznelson is professor of neurosurgery and medicine, Departments of Neurosurgery and Medicine, and associate dean of graduate medical education, Stanford University School of Medicine, Stanford, California; ORCID: https://orcid.org/0000-0001-8115-5714
| | - Tait D Shanafelt
- T.D. Shanafelt is professor of medicine, Department of Medicine, chief wellness officer, Stanford Medicine, and associate dean, Stanford University School of Medicine, Stanford, California; ORCID: https://orcid.org/0000-0002-7106-5202
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11
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Gibson R, Oliver N, McGowan B, Vetter C, Palla L, D'Annibale M, Linley J, Lorencatto F, Guess N. Towards targeted dietary support for shift workers with type 2 diabetes (Shift-Diabetes study): A mixed-methods case study protocol. Diabet Med 2022; 39:e14714. [PMID: 34611942 DOI: 10.1111/dme.14714] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/23/2021] [Accepted: 10/01/2021] [Indexed: 11/27/2022]
Abstract
BACKGROUND Blood glucose is higher in people working night shifts compared to day workers. Changes to eating behaviour, activity and sleep patterns in addition to circadian disruption are likely to impact glucose management in night-shift workers with type 2 diabetes. AIM To investigate current dietary intake and glucose variability during night work, including barriers and facilitators to dietary behaviour in this context. METHODS A mixed-methods case study will be conducted. Shift workers with type 2 diabetes working in a hospital setting will be recruited to this two-part study. Part 1: 70 participants will complete a 10-day observational study collecting data on continuous glucose, diet (self-report diary), sleep and physical activity during a period covering night work, rest days and non-night workdays. Mean glucose concentration and variability, and the mean healthy diet index score, will be compared between days of night work, non-night work and rest, after adjusting for other individual factors (sleep/physical activity/demographics). Part 2: A sample (n~13) will complete semi-structured interviews based on behavioural science frameworks to explore barriers/enablers to dietary behaviour when working night shifts. This will inform a quantitative survey to explore the generalisability of interview findings. DISCUSSION Findings from Part 1 and 2 will be triangulated to identify potential intervention strategies to address key barriers and enablers to healthier eating, and in turn improved glucose control, in shift workers with type 2 diabetes. This will be facilitated through stakeholder consultation and application of behavioural science frameworks. Shift-Diabetes study registration: ISRCTN11764942.
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Affiliation(s)
- Rachel Gibson
- Department of Nutritional Sciences, King's College London, London, UK
| | - Nick Oliver
- Department of Metabolism, Digestion and Reproduction, Imperial College London, London, UK
| | - Barbara McGowan
- Department of Diabetes and Endocrinology, Guy's and St Thomas' NHS Foundation Trust, London, UK
| | - Céline Vetter
- Circadian and Sleep Epidemiology Laboratory, Department of Integrative Physiology, University of Colorado Boulder, Boulder, Colorado, USA
| | - Luigi Palla
- Department of Public Health and Infectious Diseases, University of Rome La Sapienza, Rome, Italy
- Department of Medical Statistics, London School of Hygiene & Tropical Medicine, London, UK
- Department of Global Health, School of Tropical Medicine and Global Health, Nagasaki University, Nagasaki, Japan
| | - Maria D'Annibale
- Department of Nutritional Sciences, King's College London, London, UK
| | - Jayne Linley
- Department of Nutrition and Dietetics, Guy's and St Thomas' NHS Foundation Trust, London, UK
| | | | - Nicola Guess
- Department of Nutritional Sciences, King's College London, London, UK
- Research Centre for Optimal Health, University of Westminster, London, UK
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12
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Circadian timing of eating and BMI among adults in the American Time Use Survey. Int J Obes (Lond) 2022; 46:287-296. [PMID: 34671108 PMCID: PMC8799482 DOI: 10.1038/s41366-021-00983-3] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/23/2020] [Accepted: 09/30/2021] [Indexed: 11/18/2022]
Abstract
BACKGROUND/OBJECTIVES Experimental studies of time-restricted eating suggest that limiting the daily eating window, shifting intake to the biological morning, and avoiding eating close to the biological night may promote metabolic health and prevent weight gain. SUBJECTS/METHODS We used the Eating & Health Module of the 2006-2008 and 2014-2016 American Time Use Survey to examine cross-sectional associations of timing of eating in relation to sleep/wake times as a proxy for circadian timing with body mass index (BMI). The analytical sample included 38 302 respondents (18-64 years; BMI 18.5-50.0 kg/m2). A single 24-hour time use diary was used to calculate circadian timing of eating variables: eating window (time between first and last eating activity); morning fast (time between end of sleep and start of eating window); and evening fast (time between end of eating window and start of sleep). Multinomial logistic regression and predictive margins were used to estimate adjusted population prevalences (AP) by BMI categories and changes in prevalences associated with a one-hour change in circadian timing of eating, controlling for sociodemographic and temporal characteristics. RESULTS A one-hour increase in eating window was associated with lower adjusted prevalence of obesity (AP = 27.1%, SE = 0.1%). Conversely, a one-hour increase in morning fast (AP = 28.7%, SE = 0.1%) and evening fast (AP = 28.5%, SE = 0.1%) were each associated with higher prevalence of obesity; interactions revealed differing patterns of association by combination of eating window with morning/evening fast (p < 0.0001). CONCLUSIONS Contrary to hypotheses, longer eating windows were associated with a lower adjusted prevalence of obesity and longer evening fasts were associated with a higher prevalence of obesity. However, as expected, longer morning fast was associated with a higher adjusted prevalence of obesity. Studies are needed to disentangle the contributions of diet quality/quantity and social desirability bias in the relationship between circadian timing of eating and BMI.
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13
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Molzof HE, Peterson CM, Thomas SJ, Gloston GF, Johnson RL, Gamble KL. Nightshift Work and Nighttime Eating Are Associated With Higher Insulin and Leptin Levels in Hospital Nurses. Front Endocrinol (Lausanne) 2022; 13:876752. [PMID: 35615722 PMCID: PMC9124849 DOI: 10.3389/fendo.2022.876752] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/15/2022] [Accepted: 03/29/2022] [Indexed: 11/13/2022] Open
Abstract
BACKGROUND Circadian misalignment between behaviors such as feeding and endogenous circadian rhythms, particularly in the context of shiftwork, is associated with poorer cardiometabolic health. We examined whether insulin and leptin levels differ between dayshift versus nightshift nurses, as well as explored whether the timing of food intake modulates these effects in nightshift workers. METHODS Female nurses (N=18; 8 dayshift and 10 nightshift) completed daily diet records for 8 consecutive days. The nurses then completed a 24-h inpatient stay, during which blood specimens were collected every 3 h (beginning at 09:00) and meals were consumed at regular 3-h intervals (09:00, 12:00, 15:00, and 18:00). Specimens were analyzed for insulin and leptin levels, and generalized additive models were used to examine differences in mean insulin and leptin levels. RESULTS Mean insulin and leptin levels were higher in nightshift nurses by 11.6 ± 3.8 mU/L (p=0.003) and 7.4 ± 3.4 ng/ml (p=0.03), respectively, compared to dayshift nurses. In an exploratory subgroup analysis of nightshift nurses, predominately eating at night (21:00 - 06:00) was associated with significantly higher insulin and leptin levels than consuming most calories during the daytime (06:00 - 21:00). CONCLUSIONS In our study of hospital nurses, working the nightshift was associated with higher insulin and leptin levels, and these effects were driven by eating predominately at night. We conclude that although nightshift work may raise insulin and leptin levels, eating during the daytime may attenuate some of the negative effects of nightshift work on metabolic health.
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Affiliation(s)
- Hylton E. Molzof
- Department of Psychiatry and Behavioral Sciences, Division of Sleep Medicine, Stanford University, Stanford, CA, United States
| | - Courtney M. Peterson
- Department of Nutrition Sciences, University of Alabama at Birmingham, Birmingham, AL, United States
| | - S. Justin Thomas
- Department of Psychiatry and Behavioral Neurobiology, Heersink School of Medicine, University of Alabama at Birmingham, Birmingham, AL, United States
| | - Gabrielle F. Gloston
- Department of Psychiatry and Behavioral Neurobiology, Heersink School of Medicine, University of Alabama at Birmingham, Birmingham, AL, United States
| | - Russell L. Johnson
- Department of Psychiatry and Behavioral Neurobiology, Heersink School of Medicine, University of Alabama at Birmingham, Birmingham, AL, United States
| | - Karen L. Gamble
- Department of Psychiatry and Behavioral Neurobiology, Heersink School of Medicine, University of Alabama at Birmingham, Birmingham, AL, United States
- *Correspondence: Karen L. Gamble,
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14
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Blankenship JM, Vetter C, Broussard JL. Impairments in glycemic control during Eastbound transatlantic travel in healthy adults. SLEEP ADVANCES 2022; 3:zpac009. [PMID: 35601081 PMCID: PMC9112920 DOI: 10.1093/sleepadvances/zpac009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/17/2021] [Revised: 03/07/2022] [Indexed: 11/13/2022]
Abstract
Abstract
Study Objectives
Repeated bouts of circadian misalignment impair glucose tolerance. However, whether circadian misalignment associated with travel and jet lag impair glucose homeostasis in a free-living population is not known. The goal of the present study was to examine glycemic control during one week of Eastbound transatlantic travel in healthy men and women.
Methods
Seven healthy participants (5 women; age: 35.6 ± 2.5 years, BMI: 23.9 ± 2.4 m/kg2) traveled from Colorado, USA (GMT-7) to Europe (GMT and GMT+1) and wore a continuous glucose monitor (Freestyle Libre Pro) for 8–14 days before, during, and after travel. Indices of glycemic control were summarized over 24-hour periods and by day and night.
Results
Mean glucose, peak glucose, and time spent in hyperglycemia increased linearly throughout the travel period relative to baseline levels. Mean glucose concentrations rose 1.03 mg/dL (95% CI: 0.34, 1.74) and duration of hyperglycemia increased by 17 min (95% CI: 5.5, 28.6) each 24-hour period. Increases in 24-hour glucose were primarily driven by increases in daytime parameters with rising mean glucose (0.72 mg/dL per day, [95% CI: −0.1, 1.5]) and duration of hyperglycemia (13.2 min per day [95% CI: 4.3, 22.1]). Mean glucose, but not peak glucose or time spent in hyperglycemia, increased each night (0.7 mg/dL per night [95% CI: 0.2, 1.2]).
Conclusions
Eastbound transatlantic travel induced a progressive worsening of glucose metrics during 24-hour, day, and night periods. Future research on managing glycemic control during jet lag in people with metabolic disorders is warranted.
Clinical Trial Registration
None
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Affiliation(s)
- Jennifer M Blankenship
- Division of Endocrinology, Metabolism and Diabetes, Department of Medicine, University of Colorado, Anschutz Medical Campus, Aurora, CO, USA
| | - Céline Vetter
- Department of Integrative Physiology, University of Colorado, Boulder, CO, USA
| | - Josiane L Broussard
- Division of Endocrinology, Metabolism and Diabetes, Department of Medicine, University of Colorado, Anschutz Medical Campus, Aurora, CO, USA
- Department of Health and Exercise Science, Colorado State University, Fort Collins, CO, USA
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15
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The Effect of Night Duty of Pharmacists on Sleepiness and Concentration at Daytime. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2021; 18:ijerph18179211. [PMID: 34501801 PMCID: PMC8430755 DOI: 10.3390/ijerph18179211] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 07/20/2021] [Revised: 08/23/2021] [Accepted: 08/29/2021] [Indexed: 11/17/2022]
Abstract
Background: The changing responsibilities of pharmacists contribute to a lack of qualified pharmacists to fill vacant positions, particularly in rural areas. Consequently, pharmacy managers cover various duties, including an increasing number of nights being on duty that can impair daytime concentration and performance. The objective of the study was to assess the effect of night duties on daytime sleepiness, sleep quality, and concentration abilities of pharmacists. Methods: 22 pharmacists, both sexes, aged 27 to 60 years, were recruited and their sleep time, sleep efficiency, and mobility (actigraphy) were assessed during a night on duty and a control night using an actimetry. Daytime sleepiness and concentration were assessed using standardized questionnaires (ESS, KSS, d2-R). Results: Significant differences were observed between the night shift and control nights with respect to sleep time, sleep efficiency, and mobility. Daytime sleepiness was significantly increased after night shifts (ESS: 11.64 vs. 2.09; KSS: 6.77 vs. 2.41 after a night shift and control night, respectively; p < 0.001) and concentration diminished compared to control nights (d2-R KL: 220.95 vs. 260.36 after a night shift and control night, respectively; p < 0.001). Conclusions: The results provide evidence that night duties lead to high daytime sleepiness in pharmacists, which in turn may negatively affect their ability to concentrate and their error rate. Existing regulations on emergency pharmacy services should be reconsidered regarding the safety of the pharmaceutical supply.
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16
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Ávila-Román J, Soliz-Rueda JR, Bravo FI, Aragonès G, Suárez M, Arola-Arnal A, Mulero M, Salvadó MJ, Arola L, Torres-Fuentes C, Muguerza B. Phenolic compounds and biological rhythms: Who takes the lead? Trends Food Sci Technol 2021. [DOI: 10.1016/j.tifs.2021.04.050] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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17
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Grant LK, Czeisler CA, Lockley SW, Rahman SA. Time-of-day and Meal Size Effects on Clinical Lipid Markers. J Clin Endocrinol Metab 2021; 106:e1373-e1379. [PMID: 33051649 PMCID: PMC8502473 DOI: 10.1210/clinem/dgaa739] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/16/2020] [Accepted: 10/08/2020] [Indexed: 02/06/2023]
Abstract
CONTEXT Dyslipidemia and cardiovascular disease are common in shift workers and eating at night may contribute to this pathophysiology. OBJECTIVE To examine the effects of eating at different times of day on lipid profiles. DESIGN Two 24-hour baseline days with 8 hours of sleep, 3 meals (breakfast, lunch, dinner) and a snack, followed by a 40-hour constant routine (CR) with hourly isocaloric meals. SETTING Intensive Physiological Monitoring Unit, Brigham and Women's Hospital. PARTICIPANTS Twenty-one healthy adults [23.4 ± 2.7 years, 5F]. INTERVENTION Forty-hour CR. MAIN OUTCOME MEASURES A standard clinical lipid panel, consisting of total cholesterol, triglyceride (TG), high-density lipoprotein cholesterol (HDL-C), and low-density lipoprotein cholesterol (LDL-C), was assayed in blood samples collected 4-hourly across ~4 days. RESULTS When participants ate at night, levels of TG were similar to eating during the day, however, these levels at night were reached with consuming approximately half the calories. Additionally, 24-hour levels of TG were 10% higher when meals were consumed hourly across 24 hours compared to consuming a typical 3-meal schedule while awake during the day and sleeping at night. The endogenous circadian rhythms of TG, which peaked at night, were shifted earlier by ~10 hours under baseline conditions, whereas the rhythms in total cholesterol, HDL-C, and LDL-C remained unchanged and peaked in the afternoon. CONCLUSIONS The time-of-day dependency on postprandial lipid metabolism, which leads to hypersensitivity in TG responses when eating at night, may underlie the dyslipidemia and elevated cardiovascular disease risk observed in shift workers.
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Affiliation(s)
- Leilah K Grant
- Division of Sleep and Circadian Disorders, Departments of Medicine and Neurology, Brigham and Women’s Hospital, Boston, Massachusetts
- Division of Sleep Medicine, Harvard Medical School, Boston, Massachusetts
| | - Charles A Czeisler
- Division of Sleep and Circadian Disorders, Departments of Medicine and Neurology, Brigham and Women’s Hospital, Boston, Massachusetts
- Division of Sleep Medicine, Harvard Medical School, Boston, Massachusetts
| | - Steven W Lockley
- Division of Sleep and Circadian Disorders, Departments of Medicine and Neurology, Brigham and Women’s Hospital, Boston, Massachusetts
- Division of Sleep Medicine, Harvard Medical School, Boston, Massachusetts
| | - Shadab A Rahman
- Division of Sleep and Circadian Disorders, Departments of Medicine and Neurology, Brigham and Women’s Hospital, Boston, Massachusetts
- Division of Sleep Medicine, Harvard Medical School, Boston, Massachusetts
- Correspondence and Reprint Requests: Shadab A. Rahman, Ph.D., M.P.H., Division of Sleep and Circadian Disorders, Department of Medicine, Brigham and Women’s Hospital, 221 Longwood Avenue, Boston, MA 02115. E-mail:
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18
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Circadian Misalignment Induced by Chronic Night Shift Work Promotes Endoplasmic Reticulum Stress Activation Impacting Directly on Human Metabolism. BIOLOGY 2021; 10:biology10030197. [PMID: 33807589 PMCID: PMC7998626 DOI: 10.3390/biology10030197] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/22/2020] [Revised: 01/24/2021] [Accepted: 01/25/2021] [Indexed: 01/04/2023]
Abstract
Simple Summary The demands of modern society have made shift work a necessity. Night work is associated with an increased risk of metabolic problems such as obesity and diabetes, which is mainly due to the misalignment of circadian rhythms that play a crucial role in many biological processes. This study performed clinical, anthropometric, and molecular analyses on 40 hospital workers who work day or night. We demonstrated that night workers had increased glucose levels, triglycerides, waist circumference, and blood pressure compared to day workers. Surprisingly, we report that night workers have significant changes in the expression of circadian clock genes and an up-regulation of genes related to endoplasmic reticulum stress (ERS). These findings provide new insights into the effects of night shift work on the expression of circadian cycle genes and ERS activation, leading to metabolic stress and the development of metabolic diseases associated with night work. Abstract Night work has become necessary in our modern society. However, sleep deprivation induces a circadian misalignment that effectively contributes to the development of diseases associated with metabolic syndrome, such as obesity and diabetes. Here, we evaluated the pattern of circadian clock genes and endoplasmic reticulum stress (ERS) genes in addition to metabolic and anthropometric measures in subjects that work during a nocturnal period compared with day workers. We study 20 night workers (NW) and 20 day workers (DW) submitted to a work schedule of 12 h of work for 36 h of rest for at least 5 years in a hospital. The present report shows that NW have increased fasting blood glucose, glycated hemoglobin (HbA1c), triglycerides, and low-density lipoprotein (LDL)-cholesterol levels, and lower high-density lipoprotein (HDL)-cholesterol levels compared to DW. In addition, we observed that waist circumference (WC), waist–hip ratio (WHR), and systemic blood pressure are also increased in NW. Interestingly, gene expression analysis showed changes in CLOCK gene expression in peripheral blood mononuclear cells (PBMC) samples of NW compared to the DW, evidencing a peripheral circadian misalignment. This metabolic adaptation was accompanied by the up-regulation of many genes of ERS in NW. These findings support the hypothesis that night shift work results in disturbed glycemic and lipid control and affects the circadian cycle through the deregulation of peripheral CLOCK genes, which is possibly due to the activation of ERS. Thus, night work induces important metabolic changes that increase the risk of developing metabolic syndrome.
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19
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Wang Y, Yu L, Gao Y, Jiang L, Yuan L, Wang P, Cao Y, Song X, Ge L, Ding G. Association between shift work or long working hours with metabolic syndrome: a systematic review and dose-response meta-analysis of observational studies. Chronobiol Int 2021; 38:318-333. [PMID: 33557625 DOI: 10.1080/07420528.2020.1797763] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Abstract
This meta-analysis investigates the relationship between both shift work and long working hours and risk of developing metabolic syndrome (MetS). PubMed, EMBASE, and Web of Science databases were searched from the outset to December 10, 2019. Two reviewers independently screened studies, extracted data, and assessed the risk of bias of included studies. A total of 36 (30 cross-sectional, 5 cohort, and a nested case-control) studies, involving 274,263 participants, were included. The pooled odds ratio of shift work and development of MetS was 1.35 (95% confidence interval: 1.24-1.48), and the pooled odds ratio of long working hours and development of MetS was 1.19 (95% confidence interval: 0.97-1.46). In the subgroup analysis stratified by gender, the pooled odds ratios for male and female shift workers were 1.25 (95% confidence interval: 1.14-1.37) and 1.47 (95% confidence interval: 1.18-1.82), respectively. The dose-response (number of years of shift work and development of MetS) analysis showed the pooled odds ratio for 5 years of shift work was 1.07 (95% confidence interval: 1.05-1.09) and for 10 years of shift work 1.11 (95% confidence interval: 1.06-1.15). Our meta-analysis confirmed shift work is significantly associated with risk of metabolic syndrome, but the relationship between long working hours and MetS was not substantiated. Additionally, there was a nonlinear dose-response relationship between the number of years of shift work and risk of MetS, showing positive relationship to about 20 years of shift work but not for longer than 20 years. Prospective cohort studies regarding specific shift work schedules are needed to confirm these results.
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Affiliation(s)
- Yihui Wang
- Department of Social Medicine and Health Administration, School of Public Health, Lanzhou University, Gansu, China
| | - Li Yu
- Department of Social Medicine and Health Administration, School of Public Health, Lanzhou University, Gansu, China
| | - Yinyan Gao
- Department of Social Medicine and Health Administration, School of Public Health, Lanzhou University, Gansu, China
| | - Lili Jiang
- Department of Social Medicine and Health Administration, School of Public Health, Lanzhou University, Gansu, China
| | - Lin Yuan
- Department of Nutrition and Food Hygiene, School of Public Health, Lanzhou University, Gansu, China
| | - Pengju Wang
- Department of Social Medicine and Health Administration, School of Public Health, Lanzhou University, Gansu, China
| | - Yanwen Cao
- Department of Social Medicine and Health Administration, School of Public Health, Lanzhou University, Gansu, China
| | - Xuping Song
- Department of Social Medicine and Health Administration, School of Public Health, Lanzhou University, Gansu, China
| | - Long Ge
- Department of Social Medicine and Health Administration, School of Public Health, Lanzhou University, Gansu, China.,Evidence-Based Social Science Research Center, School of Public Health, Lanzhou University, Gansu, China
| | - Guowu Ding
- Department of Social Medicine and Health Administration, School of Public Health, Lanzhou University, Gansu, China
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20
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The importance of 24-h metabolism in obesity-related metabolic disorders: opportunities for timed interventions. Int J Obes (Lond) 2020; 45:479-490. [PMID: 33235354 DOI: 10.1038/s41366-020-00719-9] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/29/2020] [Revised: 09/18/2020] [Accepted: 11/03/2020] [Indexed: 11/08/2022]
Abstract
Various metabolic processes in the body oscillate throughout the natural day, driven by a biological clock. Circadian rhythms are also influenced by time cues from the environment (light exposure) and behaviour (eating and exercise). Recent evidence from diurnal- and circadian-rhythm studies indicates rhythmicity in various circulating metabolites, insulin secretion and -sensitivity and energy expenditure in metabolically healthy adults. These rhythms have been shown to be disturbed in adults with obesity-related metabolic disturbances. Moreover, eating and being (in)active at a time that the body is not prepared for it, as in night-shift work, is related to poor metabolic outcomes. These findings indicate the relevance of 24-h metabolism in obesity-related metabolic alterations and have also led to novel strategies, such as timing of food intake and exercise, to reinforce the circadian rhythm and thereby improving metabolic health. This review aims to deepen the understanding of the influence of the circadian system on metabolic processes and obesity-related metabolic disturbances and to discuss novel time-based strategies that may be helpful in combating metabolic disease.
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21
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Aarrebo Jensen M, Hansen ÅM, Sallerup M, Odgaard Nielsen N, Schlünssen V, Helene Garde A. Acute effects of night work and meals on blood glucose levels. Chronobiol Int 2020; 37:1384-1391. [DOI: 10.1080/07420528.2020.1824671] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- Marie Aarrebo Jensen
- Department of Psychosocial Work Environment, National Research Centre for the Working Environment, Copenhagen, Denmark
| | - Åse Marie Hansen
- Department of Psychosocial Work Environment, National Research Centre for the Working Environment, Copenhagen, Denmark
- Section of Social Medicine, Department of Public Health, University of Copenhagen, Copenhagen, Denmark
| | - Mette Sallerup
- Department of Psychosocial Work Environment, National Research Centre for the Working Environment, Copenhagen, Denmark
| | - Nina Odgaard Nielsen
- Centre for Nutrition and Rehabilitation, University College Absalon, Roskilde, Denmark
| | - Vivi Schlünssen
- Department of Psychosocial Work Environment, National Research Centre for the Working Environment, Copenhagen, Denmark
- Department of Public Health, Environment, Work and Health, Danish Ramazzini Centre, Aarhus University, Aarhus, Denmark
| | - Anne Helene Garde
- Department of Psychosocial Work Environment, National Research Centre for the Working Environment, Copenhagen, Denmark
- Section of Social Medicine, Department of Public Health, University of Copenhagen, Copenhagen, Denmark
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Active Physical Activity Patterns Are Associated With Improved Quality of Life and Depression Status in Taiwanese Women With Metabolic Syndrome. J Cardiovasc Nurs 2020; 34:491-502. [PMID: 31373956 DOI: 10.1097/jcn.0000000000000602] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
BACKGROUND Metabolic syndrome (MetS), health-related quality of life (HRQL), and depression status are independently associated with cardiac health. Therefore, understanding the associations between MetS, HRQL, and depression status and determining factors related to improved HRQL and depression status in people with MetS may help in cardiovascular disease prevention. OBJECTIVE The aim of this study was to examine whether there are differences in HRQL and depression status between Taiwanese women with and without MetS and whether physical activity patterns are associated with HRQL and depression status in this population. METHODS A cross-sectional study of 326 Taiwanese middle-aged and older women (≥40 years) was conducted. Metabolic syndrome was determined based on the National Cholesterol Education Program Adult Treatment Panel III definition. Health-related quality of life and depression status were collected using the Short Form 36 Health Survey and Beck Depression Inventory. Univariate and multivariate linear regression analyses were conducted. RESULTS Women with MetS had lower HRQL (P < .001) and higher depression status (P = .002) than those without MetS. Participants with active physical activity patterns had higher HRQL (P < .001) and lower depression status (P = .046) than those with sedentary patterns. Among women with MetS, those with active physical activity patterns had higher HRQL (P = .001) and lower depression status (P = .007) than those with sedentary patterns. CONCLUSIONS Metabolic syndrome is related to lower HRQL and higher depression status in women 40 years and older. Active physical activity patterns are associated with better HRQL and reduced depression status in middle-aged and older women (≥40 years) with MetS.
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Cunha NB, Silva CM, Mota MC, Lima CA, Teixeira KRC, Cunha TM, Crispim CA. A High-Protein Meal during a Night Shift Does Not Improve Postprandial Metabolic Response the Following Breakfast: A Randomized Crossover Study with Night Workers. Nutrients 2020; 12:nu12072071. [PMID: 32668588 PMCID: PMC7400935 DOI: 10.3390/nu12072071] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2020] [Revised: 06/26/2020] [Accepted: 07/09/2020] [Indexed: 11/30/2022] Open
Abstract
The aim of this study was to compare the acute effect of a high-protein/moderate carbohydrate (HP-MCHO) versus low-protein/high-carbohydrate (LP-HCHO) meal served at night on the postprandial metabolic response of male night workers the following breakfast. A randomized crossover study was performed with 14 male night workers (40.9 ± 8.9 years old; 29.1 ± 5.3 kg/m2). Participants underwent two different isocaloric dietary conditions at 1:00 h of the night shift: HP-MCHO (45 en% carbohydrate, 35 en% protein and 20 en% fat) and LP-HCHO (65 en% carbohydrate, 15 en% protein and 20 en% fat). Postprandial capillary glucose levels were determined immediately before the intake of the test meal and 30, 60, 90 and 120 min after the end of the meal. At the end of the work shift (6:30 h), participants received a standard breakfast and postprandial levels of glucose, insulin and triglycerides were determined immediately before and then every 30 min for 2 h (30, 60, 90 and 120 min). Higher values of capillary glucose were found after the LP-HCHO condition compared to the HP-MCHO condition (area under the curve (AUC) = 119.46 ± 1.49 mg/dL × min and 102.95 ± 1.28 mg/dL × min, respectively; p < 0.001). For the metabolic response to standard breakfast as the following meal, no significant differences in glucose, insulin, triglyceride, and HOMA-IR levels were found between interventions. A night meal with a higher percentage of protein and a lower percentage of carbohydrate led to minor postprandial glucose levels during the night shift but exerted no effect on the metabolic response of the following meal. This trial was registered at ClinicalTrials.gov as NCT03456219.
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Dietary Patterns of Nurses on Rotational Shifts Are Marked by Redistribution of Energy into the Nightshift. Nutrients 2020; 12:nu12041053. [PMID: 32290179 PMCID: PMC7231196 DOI: 10.3390/nu12041053] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2020] [Revised: 03/21/2020] [Accepted: 04/07/2020] [Indexed: 12/17/2022] Open
Abstract
Nightshift work is associated with adverse health outcomes, which may be related to eating during the biological night, when circadian rhythms and food intake are misaligned. Nurses often undertake nightshift work, and we aimed to investigate patterns of energy distribution and dietary intake across 14 days in 20 UK National Health Service (NHS) nurses working rotational shifts. We hypothesised that the proportion of daily energy consumed during the nightshift would increase over consecutive nights. Primary and secondary outcome measures included intakes of energy and macronutrients. Our results show that nurses consumed the same total daily energy on nightshifts and non-nightshifts, but redistributed energy to the nightshift period in increasing proportions with a significant difference between Night 1 and 2 in the proportion of total daily energy consumed (26.0 ± 15.7% vs. 33.5 ± 20.2%, mean ± SD; p < 0.01). This finding indicates that, rather than increasing total energy intake, nurses redistribute energy consumed during nightshifts as a behavioural response to consecutive nightshifts. This finding informs our understanding of how the intake of energy during the biological night can influence adverse health outcomes of nightshift work.
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Bucher Della Torre S, Wild P, Dorribo V, Danuser B, Amati F. Energy, Nutrient and Food Intakes of Male Shift Workers Vary According to the Schedule Type but Not the Number of Nights Worked. Nutrients 2020; 12:nu12040919. [PMID: 32230756 PMCID: PMC7230522 DOI: 10.3390/nu12040919] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2020] [Revised: 03/24/2020] [Accepted: 03/25/2020] [Indexed: 02/06/2023] Open
Abstract
Shift work is associated with increased risk of chronic diseases due to circadian rhythm disruptions and behavioral changes such as in eating habits. Impact of type of shifts and number of night shifts on energy, nutrient and food intake is as yet unknown. Our goal was to analyze shift workers’ dietary intake, eating behavior and eating structure, with respect to frequency of nights worked in a given week and seven schedule types. Eating habits and dietary intakes of 65 male shift workers were analyzed in three steps based on 365 24-h food records: (1) according to the number of nights, (2) in a pooled analysis according to schedule type, and (3) in search of an interaction of the schedule and the timing of intake. Mean nutrient and food group intake during the study period did not depend on the number of nights worked. Amount and distribution of energy intake as well as quality of food, in terms of nutrient and food groups, differed depending on the type of schedule, split night shifts and recovery day (day after night shift) being the most impacted. Shift workers’ qualitative and quantitative dietary intakes varied between different schedules, indicating the need for tailored preventive interventions.
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Affiliation(s)
- Sophie Bucher Della Torre
- Department of Nutrition and Dietetics, Geneva School of Health Sciences, HES-SO University of Applied Sciences and Arts Western Switzerland, Rue des Caroubiers 25, 1227 Carouge, Switzerland
- Correspondence: ; Tel.: +41-22-388-3547
| | - Pascal Wild
- Department of Health, Work and Environment, Center for Primary Care and Public Health (Unisanté), University of Lausanne, 1011 Lausanne, Switzerland
- Scientific Management, INRS, 54519 Vandoeuvre-lès-Nancy, France
| | - Victor Dorribo
- Department of Health, Work and Environment, Center for Primary Care and Public Health (Unisanté), University of Lausanne, 1011 Lausanne, Switzerland
| | - Brigitta Danuser
- Department of Health, Work and Environment, Center for Primary Care and Public Health (Unisanté), University of Lausanne, 1011 Lausanne, Switzerland
| | - Francesca Amati
- Department of Physiology and Institute of Sport Sciences, University of Lausanne, 1005 Lausanne, Switzerland
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26
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Consequences of Circadian Disruption in Shift Workers on Chrononutrition and their Psychosocial Well-Being. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2020; 17:ijerph17062043. [PMID: 32204445 PMCID: PMC7142532 DOI: 10.3390/ijerph17062043] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/19/2020] [Revised: 03/06/2020] [Accepted: 03/08/2020] [Indexed: 12/27/2022]
Abstract
The workers and employees in various institutions are subjected to different shifts and work schedules. The employees work not only at daytime but also during odd hours at night. The biological clock of an individual is often altered during night shifts. This affects the psychosocial well-being and circadian nutritional intake of the worker. Disturbance in circadian rhythm results in the development of metabolic disorders such as hypertension, dyslipidemia, dysglycemia, and abdominal obesity. In the present review, we discuss the nature of shift work, sleep/wake cycle of an individual, chrononutrition, dietary habits, and meal changes with regard to timing and frequency, related to shift work. We also discuss the relationship between nutritional intake and psychosocial well-being among shift workers. The review may be beneficial for prevention of metabolic disorders and maintaining sound psychological condition in shift workers.
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27
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BaHammam AS, Almeneessier AS. Recent Evidence on the Impact of Ramadan Diurnal Intermittent Fasting, Mealtime, and Circadian Rhythm on Cardiometabolic Risk: A Review. Front Nutr 2020; 7:28. [PMID: 32219098 PMCID: PMC7078334 DOI: 10.3389/fnut.2020.00028] [Citation(s) in RCA: 37] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2019] [Accepted: 02/26/2020] [Indexed: 01/09/2023] Open
Abstract
In this article, we reviewed recent data that examined the relationship of circadian rhythm, mealtime, and intermittent fasting with the risk of cardiometabolic dysfunction. We also examined the effect of their interactions on cardiometabolic risks. Furthermore, since major differences exists between Ramadan diurnal intermittent fasting compared to other forms of experimental intermittent fasting, in this article, we further restricted the discussion to Ramadan diurnal intermittent fasting. PubMed and Google Scholar databases were searched using “intermittent fasting,” “time-restricted feeding,” “fasting,” “mealtime,” “circadian rhythm,” and “cardiometabolic risk,” focusing on human studies published after 2013. Recent evidence indicates that meal timing may influence circadian rhythm, as a result, it may also directly or indirectly impact cardiometabolic risk. In humans, several studies suggested that late mealtime is related to an increased risk of poor cardiometabolic health. Nevertheless, large clinical interventional studies are required to assess causality between late mealtime and cardiometabolic morbidity. Currently, evidence indicates that Ramadan diurnal intermittent fasting has several beneficial effects that may reduce the risk of cardiometabolic disorders, such as weight reduction, improvement in lipid profile and glycemic control, reduction in proinflammatory markers, and oxidative stress. Nevertheless, several changes in daily lifestyle routine, happening during the Ramadan month, may affect the all measured markers of cardiometabolic diseases. Summarily, no definitive conclusion about the impact of Ramadan intermittent fasting on oxidative stress can be formulated. Therefore, large, well-designed studies, which control for various confounding factors are required to assess the influence of Ramadan diurnal intermittent fasting on markers of cardiometabolic risk and disorders.
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Affiliation(s)
- Ahmed S BaHammam
- Department of Medicine, The University Sleep Disorders Center, College of Medicine, King Saud University, Riyadh, Saudi Arabia
| | - Aljohara S Almeneessier
- Department of Medicine, The University Sleep Disorders Center, College of Medicine, King Saud University, Riyadh, Saudi Arabia.,Department of Family Medicine, College of Medicine, King Saud University, Riyadh, Saudi Arabia
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28
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Henry CJ, Kaur B, Quek RYC. Chrononutrition in the management of diabetes. Nutr Diabetes 2020; 10:6. [PMID: 32075959 PMCID: PMC7031264 DOI: 10.1038/s41387-020-0109-6] [Citation(s) in RCA: 55] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/01/2019] [Revised: 01/14/2020] [Accepted: 01/20/2020] [Indexed: 12/28/2022] Open
Abstract
Circadian rhythms are 24-h cycles regulated by endogeneous molecular oscillators called the circadian clock. The effects of diet on circadian rhythmicity clearly involves a relationship between factors such as meal timings and nutrients, known as chrononutrition. Chrononutrition is influenced by an individual's "chronotype", whereby "evening chronotypes" or also termed "later chronotype" who are biologically driven to consume foods later in the day. Research in this area has suggested that time of day is indicative of having an influence on the postprandial glucose response to a meal, therefore having a major effect on type 2 diabetes. Cross-sectional and experimental studies have shown the benefits of consuming meals early in the day than in the evening on postprandial glycaemia. Modifying the macronutrient composition of night meals, by increasing protein and fat content, has shown to be a simple strategy to improve postprandial glycaemia. Low glycaemic index (GI) foods eaten in the morning improves glycaemic response to a greater effect than when consumed at night. Timing of fat and protein (including amino acids) co-ingested with carbohydrate foods, such as bread and rice, can reduce glycaemic response. The order of food presentation also has considerable potential in reducing postprandial blood glucose (consuming vegetables first, followed by meat and then lastly rice). These practical recommendations could be considered as strategies to improve glycaemic control, rather than focusing on the nutritional value of a meal alone, to optimize dietary patterns of diabetics. It is necessary to further elucidate this fascinating area of research to understand the circadian system and its implications on nutrition that may ultimately reduce the burden of type 2 diabetes.
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Affiliation(s)
- Christiani Jeyakumar Henry
- Clinical Nutrition Research Centre, Singapore Institute for Clinical Sciences, 14 Medical Drive, #07-02, Singapore, 117599, Singapore. .,National University of Singapore, Department of Biochemistry, 8 Medical Drive, Singapore, 117596, Singapore.
| | - Bhupinder Kaur
- Clinical Nutrition Research Centre, Singapore Institute for Clinical Sciences, 14 Medical Drive, #07-02, Singapore, 117599, Singapore
| | - Rina Yu Chin Quek
- Clinical Nutrition Research Centre, Singapore Institute for Clinical Sciences, 14 Medical Drive, #07-02, Singapore, 117599, Singapore
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29
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Brandhorst S, Longo VD. Dietary Restrictions and Nutrition in the Prevention and Treatment of Cardiovascular Disease. Circ Res 2019; 124:952-965. [PMID: 30870119 DOI: 10.1161/circresaha.118.313352] [Citation(s) in RCA: 69] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Cardiovascular disease (CVD) is the leading cause of death in many developed countries and remains one of the major diseases strongly affected by the diet. Nutrition can affect CVD directly by contributing to the accumulation of vascular plaques and also indirectly by regulating the rate of aging. This review summarizes research on nutrition and CVD incidence based on a multipillar system that includes basic research focused on aging, epidemiological studies, clinical studies, and studies of centenarians. The relevant research linking nutrition and CVD with focus on macronutrients and aging will be highlighted. We will review some of the most relevant studies on nutrition and CVD treatment, also focusing on interventions known to delay aging. We will discuss both everyday dietary compositions, as well as intermittent and periodic fasting interventions with the potential to prevent and treat CVD.
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Affiliation(s)
- Sebastian Brandhorst
- From the Longevity Institute, Davis School of Gerontology, University of Southern California, Los Angeles (S.B., V.D.L.)
| | - Valter D Longo
- From the Longevity Institute, Davis School of Gerontology, University of Southern California, Los Angeles (S.B., V.D.L.).,Institute of Molecular Oncology, Italian Foundation for Cancer Research, Milan (V.D.L.)
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30
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Leung GKW, Huggins CE, Ware RS, Bonham MP. Time of day difference in postprandial glucose and insulin responses: Systematic review and meta-analysis of acute postprandial studies. Chronobiol Int 2019; 37:311-326. [DOI: 10.1080/07420528.2019.1683856] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Gloria K. W. Leung
- Department of Nutrition, Dietetics and Food, Monash University, Melbourne, Victoria, Australia
| | - Catherine E. Huggins
- Department of Nutrition, Dietetics and Food, Monash University, Melbourne, Victoria, Australia
| | - Robert S. Ware
- Menzies Health Institute Queensland, Griffith University, Gold Coast, Queensland, Australia
| | - Maxine P. Bonham
- Department of Nutrition, Dietetics and Food, Monash University, Melbourne, Victoria, Australia
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31
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Shi Y, Liu L, Hamada T, Nowak JA, Giannakis M, Ma Y, Song M, Nevo D, Kosumi K, Gu M, Kim SA, Morikawa T, Wu K, Sui J, Papantoniou K, Wang M, Chan AT, Fuchs CS, Meyerhardt JA, Giovannucci E, Ogino S, Schernhammer ES, Nishihara R, Zhang X. Night-Shift Work Duration and Risk of Colorectal Cancer According to IRS1 and IRS2 Expression. Cancer Epidemiol Biomarkers Prev 2019; 29:133-140. [PMID: 31666286 DOI: 10.1158/1055-9965.epi-19-0325] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2019] [Revised: 08/05/2019] [Accepted: 10/11/2019] [Indexed: 02/07/2023] Open
Abstract
BACKGROUND We hypothesized that the risk of colorectal cancer in night-shift workers might be different according to insulin receptor substrate status. METHODS Among 77,470 eligible women having night work assessed in the Nurses' Health Study, we documented a total of 1,397 colorectal cancer cases, of which 304 or 308 had available data on IRS1 and IRS2, respectively. We used duplication-method Cox proportional hazards regression analysis for competing risks to calculate HRs and 95% confidence intervals (CI) for each colorectal cancer subtype. We measured tumor IRS1 or IRS2 expression by immunohistochemistry (IHC). RESULTS Compared with women who never worked night shifts, those working ≥15 years night shifts had a marginal trend of increased overall risk of colorectal cancer (P trend = 0.06; multivariable HR = 1.20; 95% CI, 0.99-1.45). Longer duration of night-shift work was associated with a higher risk of IRS2-positive tumors (multivariable HR = 2.69; 95% CI, 1.48-4.89; P trend = 0.001, ≥15 years night shifts vs. never) but not with IRS2-negative tumors (multivariable HR = 0.90; 95% CI, 0.54-1.51; P trend = 0.72; P heterogeneity for IRS2 = 0.008). Similarly, the corresponding multivariable HRs were 1.81 for IRS1-positive tumors (95% CI, 0.94-3.48; P trend = 0.06) and 1.13 for IRS1-negative tumors (95% CI, 0.71-1.80; P trend = 0.56; P heterogeneity for IRS1 = 0.02). CONCLUSIONS Our molecular pathologic epidemiology data suggest a potential role of IRS in mediating carcinogenesis induced by night-shift work. IMPACT Although these findings need validation, rotating night shift might increase colorectal cancer risk in women with abnormal insulin receptor pathways.
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Affiliation(s)
- Yan Shi
- Department of Oncologic Pathology, Dana-Farber Cancer Institute and Harvard Medical School, Boston, Massachusetts.,Department of Medical Oncology, Chinese PLA General Hospital, Beijing, China
| | - Li Liu
- Department of Oncologic Pathology, Dana-Farber Cancer Institute and Harvard Medical School, Boston, Massachusetts.,Department of Epidemiology and Biostatistics, and the Ministry of Education Key Lab of Environment and Health, School of Public Health, Huazhong University of Science and Technology, Wuhan, China
| | - Tsuyoshi Hamada
- Department of Oncologic Pathology, Dana-Farber Cancer Institute and Harvard Medical School, Boston, Massachusetts
| | - Jonathan A Nowak
- Program in MPE Molecular Pathological Epidemiology, Department of Pathology, Brigham and Women's Hospital and Harvard Medical School, Boston, Massachusetts
| | - Marios Giannakis
- Broad Institute of Massachusetts Institute of Technology (MIT) and Harvard, Cambridge, Massachusetts.,Department of Medical Oncology, Dana-Farber Cancer Institute and Harvard Medical School, Boston, Massachusetts
| | - Yanan Ma
- Channing Division of Network Medicine, Department of Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, Massachusetts.,Department of Biostatistics and Epidemiology, School of Public Health, China Medical University, Shenyang, Liaoning, China
| | - Mingyang Song
- Clinical and Translational Epidemiology Unit, Massachusetts General Hospital and Harvard Medical School, Boston, Massachusetts.,Division of Gastroenterology, Massachusetts General Hospital and Harvard Medical School, Boston, Massachusetts
| | - Daniel Nevo
- Department of Biostatistics, Harvard T.H. Chan School of Public Health, Boston, Massachusetts.,Department of Epidemiology, Harvard T.H. Chan School of Public Health, Boston, Massachusetts
| | - Keisuke Kosumi
- Department of Oncologic Pathology, Dana-Farber Cancer Institute and Harvard Medical School, Boston, Massachusetts
| | - Mancang Gu
- Department of Oncologic Pathology, Dana-Farber Cancer Institute and Harvard Medical School, Boston, Massachusetts
| | - Sun A Kim
- Laboratory of Human Carcinogenesis, NCI, NIH, Bethesda, Maryland
| | - Teppei Morikawa
- Department of Pathology, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - Kana Wu
- Department of Nutrition, Harvard T.H. Chan School of Public Health, Boston, Massachusetts
| | - Jing Sui
- Channing Division of Network Medicine, Department of Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, Massachusetts.,Key Laboratory of Environmental Medicine Engineering, Ministry of Education, School of Public Health, Southeast University, Nanjing, Jiangsu, China
| | - Kyriaki Papantoniou
- Department of Epidemiology, Center for Public Health, Medical University of Vienna, Vienna, Austria
| | - Molin Wang
- Department of Biostatistics, Harvard T.H. Chan School of Public Health, Boston, Massachusetts.,Department of Epidemiology, Harvard T.H. Chan School of Public Health, Boston, Massachusetts
| | - Andrew T Chan
- Broad Institute of Massachusetts Institute of Technology (MIT) and Harvard, Cambridge, Massachusetts.,Channing Division of Network Medicine, Department of Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, Massachusetts.,Clinical and Translational Epidemiology Unit, Massachusetts General Hospital and Harvard Medical School, Boston, Massachusetts.,Division of Gastroenterology, Massachusetts General Hospital and Harvard Medical School, Boston, Massachusetts
| | - Charles S Fuchs
- Channing Division of Network Medicine, Department of Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, Massachusetts.,Yale Cancer Center, New Haven, Connecticut.,Department of Medicine, Yale School of Medicine, New Haven, Connecticut.,Smilow Cancer Hospital, New Haven, Connecticut
| | - Jeffrey A Meyerhardt
- Department of Medical Oncology, Dana-Farber Cancer Institute and Harvard Medical School, Boston, Massachusetts
| | - Edward Giovannucci
- Channing Division of Network Medicine, Department of Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, Massachusetts.,Department of Epidemiology, Harvard T.H. Chan School of Public Health, Boston, Massachusetts.,Department of Nutrition, Harvard T.H. Chan School of Public Health, Boston, Massachusetts
| | - Shuji Ogino
- Department of Oncologic Pathology, Dana-Farber Cancer Institute and Harvard Medical School, Boston, Massachusetts.,Program in MPE Molecular Pathological Epidemiology, Department of Pathology, Brigham and Women's Hospital and Harvard Medical School, Boston, Massachusetts.,Broad Institute of Massachusetts Institute of Technology (MIT) and Harvard, Cambridge, Massachusetts.,Department of Epidemiology, Harvard T.H. Chan School of Public Health, Boston, Massachusetts
| | - Eva S Schernhammer
- Channing Division of Network Medicine, Department of Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, Massachusetts. .,Department of Epidemiology, Harvard T.H. Chan School of Public Health, Boston, Massachusetts.,Department of Epidemiology, Center for Public Health, Medical University of Vienna, Vienna, Austria
| | - Reiko Nishihara
- Department of Oncologic Pathology, Dana-Farber Cancer Institute and Harvard Medical School, Boston, Massachusetts. .,Program in MPE Molecular Pathological Epidemiology, Department of Pathology, Brigham and Women's Hospital and Harvard Medical School, Boston, Massachusetts.,Broad Institute of Massachusetts Institute of Technology (MIT) and Harvard, Cambridge, Massachusetts.,Department of Biostatistics, Harvard T.H. Chan School of Public Health, Boston, Massachusetts.,Department of Epidemiology, Harvard T.H. Chan School of Public Health, Boston, Massachusetts
| | - Xuehong Zhang
- Channing Division of Network Medicine, Department of Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, Massachusetts.
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32
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Vilela S, Oliveira A, Severo M, Lopes C. Chrono-Nutrition: The Relationship between Time-of-Day Energy and Macronutrient Intake and Children’s Body Weight Status. J Biol Rhythms 2019; 34:332-342. [DOI: 10.1177/0748730419838908] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
The time of eating has been considered to have an important role in weight regulation. However, it is unknown if there are specific daily patterns of energy and macronutrient distribution that could be more beneficial for metabolic outcomes, especially obesity. This study aimed to assess the effect of time-of-day energy and macronutrient intake at 4 y of age on the weight status at 7 y of age. The study sample included 1961 children from the population-based birth cohort Generation XXI, with data on 3-day food diaries at 4 y and body mass index (BMI) z-scores at 7 y. Dietary patterns based on the collected data were obtained for the distribution of energy and macronutrients across eating occasions. Having a relatively higher energy intake at lunch and supper (OR = 1.19, 95% CI = 1.05 to 1.34) or at mid-afternoon (OR = 1.18, 95% CI = 1.05 to 1.34) at 4 y was associated with higher odds of becoming overweight/obese at 7 y. A relatively higher intake of fat at lunch was positively associated with later children’s odds for being overweight or obese (OR = 1.17, 95% CI = 1.03 to 1.32). These associations were independent of the effect on children’s eating behaviors related to appetite. Our results also show a detrimental relation between skipping breakfast and eating late in the day and children’s body weight. Considering all daily eating occasions, a higher proportion of energy and macronutrient intake at the main meals and a lower proportion during the afternoon and evening seems to be more beneficial for children’s weight. These results emphasize the important role of daily food intake rhythm on excessive weight gain in childhood.
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Affiliation(s)
- Sofia Vilela
- EPIUnit – Instituto de Saúde Pública, Universidade do Porto, Rua das Taipas, Porto, Portugal
- Departamento de Ciências da Saúde Pública e Forenses e Educação Médica, Faculdade de Medicina, Universidade do Porto, Porto, Portugal
| | - Andreia Oliveira
- EPIUnit – Instituto de Saúde Pública, Universidade do Porto, Rua das Taipas, Porto, Portugal
- Departamento de Ciências da Saúde Pública e Forenses e Educação Médica, Faculdade de Medicina, Universidade do Porto, Porto, Portugal
| | - Milton Severo
- EPIUnit – Instituto de Saúde Pública, Universidade do Porto, Rua das Taipas, Porto, Portugal
- Departamento de Ciências da Saúde Pública e Forenses e Educação Médica, Faculdade de Medicina, Universidade do Porto, Porto, Portugal
| | - Carla Lopes
- EPIUnit – Instituto de Saúde Pública, Universidade do Porto, Rua das Taipas, Porto, Portugal
- Departamento de Ciências da Saúde Pública e Forenses e Educação Médica, Faculdade de Medicina, Universidade do Porto, Porto, Portugal
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33
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Murray M, Dordevic AL, Ryan L, Bonham MP. A Single-Dose of a Polyphenol-Rich Fucus Vesiculosus Extract is Insufficient to Blunt the Elevated Postprandial Blood Glucose Responses Exhibited by Healthy Adults in the Evening: A Randomised Crossover Trial. Antioxidants (Basel) 2019; 8:antiox8020049. [PMID: 30813480 PMCID: PMC6406275 DOI: 10.3390/antiox8020049] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2018] [Revised: 02/12/2019] [Accepted: 02/16/2019] [Indexed: 12/14/2022] Open
Abstract
When healthy adults consume carbohydrates at night, postprandial blood glucose responses are elevated and prolonged compared to daytime.Extended postprandial hyperglycaemia is a risk factor for type 2 diabetes. Polyphenols are bioactive secondary metabolites of plants and algae with potential to moderate postprandial glycaemia. This study investigated whether a polyphenol-rich alga (Fucus vesiculosus) extract moderated postprandial glycaemia in the evening in healthy adults. In a double blind, placebo-controlled, randomised three-way crossover trial, 18 participants consumed a polyphenol-rich extract, a cellulose placebo and rice flour placebo (7:15 p.m.) prior to 50 g available carbohydrate from bread (7:45 p.m.), followed by three hours of blood sampling to assess glucose and insulin. A subset of participants (n = 8) completed the same protocol once in the morning with only the cellulose placebo (7:15 a.m.). No effect of the polyphenol-rich extract was observed on postprandial glycaemia in the evening, compared with placebos, in the group as a whole. However, in females only, peak blood glucose concentration was reduced following the polyphenol-rich extract. In the subset analysis, as expected, participants exhibited elevated postprandial blood glucose in the evening compared with the morning following the cellulose placebo. This was the first study to investigate whether a polyphenol intervention moderated evening postprandial hyperglycaemia. The lowering effect observed in females suggests that this warrants further investigation.
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Affiliation(s)
- Margaret Murray
- Department of Nutrition, Dietetics and Food, Monash University, Notting Hill VIC 3168, Australia.
- School of Chemistry, Monash University, Clayton, VIC 3800, Australia.
| | - Aimee L Dordevic
- Department of Nutrition, Dietetics and Food, Monash University, Notting Hill VIC 3168, Australia.
| | - Lisa Ryan
- School of Science and Computing, Galway-Mayo Institute of Technology, Galway H91 T8NW, Ireland.
| | - Maxine P Bonham
- Department of Nutrition, Dietetics and Food, Monash University, Notting Hill VIC 3168, Australia.
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34
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Bonham MP, Kaias E, Huggins CE, Davis R, Leung GK, Eikelis N, Shaw E, Murgia C. Effects of macronutrient manipulation on postprandial metabolic responses in overweight males with high fasting lipids during simulated shift work: A randomized crossover trial. Clin Nutr 2019; 39:369-377. [PMID: 30853262 DOI: 10.1016/j.clnu.2019.02.018] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2018] [Revised: 02/08/2019] [Accepted: 02/09/2019] [Indexed: 02/07/2023]
Abstract
BACKGROUND & AIMS Meals consumed out of synchronisation with normal circadian rhythms are associated with metabolic dysregulation. Changes in macronutrient composition of meals can improve metabolic responses during the day. Therefore, we aimed to investigate whether macronutrient manipulation of meals alters postprandial glucose and lipid responses and the expression of circadian genes during the night. METHODS In a randomised crossover trial, 16 overweight males with high fasting lipids were fed isocaloric meals (2.7 MJ) at 0000 h. The meals differed primarily in total fat and total sugars content (control (8% total sugar, 5% saturated fat) vs test (16% total sugar, 26% saturated fat)). Postprandial blood samples were collected for glucose, insulin (3 h) and triglycerides (6 h) and analysed as incremental area under the curve (iAUC). RNA was extracted at 0 h, 2 h and 4 h and changes in expressions of the circadian genes clock and Per 1-3 analysed. RESULTS Postprandial glucose (p = 0.04) and insulin iAUC (p = 0.02) were significantly higher after consumption of the test meal compared to the control meal. Postprandial triglyceride iAUC was not statistically different between the two meal types (p = 0.72). No change in circadian gene expression was observed after the two meals. CONCLUSIONS Our results showed that macronutrient composition affects postprandial metabolic response at night. It emphasizes the need to consider the role and effects of night time eating, when developing metabolic disease prevention strategies for shift workers. STUDY ID NUMBER ACTRN12618001115224. WEBSITE OF TRIAL REGISTRY: http://www.anzctr.org.au/. Retrospectively registered after data collection.
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Affiliation(s)
- Maxine P Bonham
- Department of Nutrition, Dietetics and Food, Monash University, Notting Hill, Victoria, 3168, Australia.
| | - Elleni Kaias
- Department of Nutrition, Dietetics and Food, Monash University, Notting Hill, Victoria, 3168, Australia.
| | - Catherine E Huggins
- Department of Nutrition, Dietetics and Food, Monash University, Notting Hill, Victoria, 3168, Australia.
| | - Rochelle Davis
- Department of Nutrition, Dietetics and Food, Monash University, Notting Hill, Victoria, 3168, Australia.
| | - Gloria Kw Leung
- Department of Nutrition, Dietetics and Food, Monash University, Notting Hill, Victoria, 3168, Australia.
| | - Nina Eikelis
- Iverson Health Innovation Research Institute, Swinburne University of Technology, Hawthorn, Victoria, Australia; Baker Heart and Diabetes Institute, Melbourne, Victoria, Australia.
| | - Emma Shaw
- Department of Nutrition, Dietetics and Food, Monash University, Notting Hill, Victoria, 3168, Australia.
| | - Chiara Murgia
- Department of Nutrition, Dietetics and Food, Monash University, Notting Hill, Victoria, 3168, Australia.
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Leung GK, Huggins CE, Bonham MP. Effect of meal timing on postprandial glucose responses to a low glycemic index meal: A crossover trial in healthy volunteers. Clin Nutr 2019; 38:465-471. [DOI: 10.1016/j.clnu.2017.11.010] [Citation(s) in RCA: 45] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2017] [Revised: 11/06/2017] [Accepted: 11/14/2017] [Indexed: 01/17/2023]
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Bonham MP, Kaias E, Zimberg I, Leung GKW, Davis R, Sletten TL, Windsor-Aubrey H, Huggins CE. Effect of Night Time Eating on Postprandial Triglyceride Metabolism in Healthy Adults: A Systematic Literature Review. J Biol Rhythms 2019; 34:119-130. [DOI: 10.1177/0748730418824214] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Eating at night time, as is frequent in shift workers, may contribute to increased cardiovascular disease (CVD) risk through a disruption in usual lipid metabolism, resulting in repeated and sustained hyperlipidemia at night. This systematic review aimed to investigate the impact of eating a meal at night compared with the same meal eaten during the day on postprandial lipemia. Six databases were searched: CINAHL Plus, Cochrane Library, EMBASE, Ovid MEDLINE, Informit, and SCOPUS. Eligible studies were original research cross-over design with a minimum fasting period of 5 h before testing preceded by a standardized control meal; measured postprandial triacylglycerol (TAG) for 5 h or greater; had meal time between 0700 h and 1600 h for day time and between 2000 h and 0400 h for night time; and had within-study test meals (food or drink) that were identical in macronutrient composition and energy. Two authors independently completed eligibility and quality assessment using the American Dietetic Association Quality Criteria Checklist for Primary Research. After removing duplicates, 4,423 articles were screened, yielding 5 studies for qualitative synthesis. All studies identified at least one parameter of the postprandial TAG response that was different as a result of meal time (e.g., the total concentration or the time course kinetics). Two studies reported a greater total TAG concentration (area under curve) at night compared with day, and 3 studies found no difference. Four studies reported that the kinetics of the postprandial time course of TAGs was different at night compared with during the day. Inconsistent reporting in the primary studies was a limitation of the review. Night eating may negatively affect postprandial lipemia and this review shows there is a need to rigorously test this using standardized methods and analysis with larger sample sizes. This is critical for informing strategies to lower CVD risk for shift workers.
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Affiliation(s)
- Maxine P. Bonham
- Department of Nutrition, Dietetics and Food, Monash University, VIC Australia
| | - Elleni Kaias
- Department of Nutrition, Dietetics and Food, Monash University, VIC Australia
| | - Iona Zimberg
- Department of Nutrition, Dietetics and Food, Monash University, VIC Australia
| | - Gloria K. W. Leung
- Department of Nutrition, Dietetics and Food, Monash University, VIC Australia
| | - Rochelle Davis
- Department of Nutrition, Dietetics and Food, Monash University, VIC Australia
| | - Tracey L. Sletten
- Monash Institute of Cognitive and Clinical Neurosciences, School of Psychological Sciences, Monash University, VIC, Australia
- Cooperative Research Centre for Alertness, Safety and Productivity, VIC, Australia
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Kervezee L, Kosmadopoulos A, Boivin DB. Metabolic and cardiovascular consequences of shift work: The role of circadian disruption and sleep disturbances. Eur J Neurosci 2018; 51:396-412. [PMID: 30357975 DOI: 10.1111/ejn.14216] [Citation(s) in RCA: 95] [Impact Index Per Article: 15.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2018] [Revised: 09/25/2018] [Accepted: 10/11/2018] [Indexed: 12/26/2022]
Abstract
Shift work, defined as work occurring outside typical daytime working hours, is associated with an increased risk of various non-communicable diseases, including diabetes and cardiovascular disease. Disruption of the internal circadian timing system and concomitant sleep disturbances is thought to play a critical role in the development of these health problems. Indeed, controlled laboratory studies have shown that short-term circadian misalignment and sleep restriction independently impair physiological processes, including insulin sensitivity, energy expenditure, immune function, blood pressure and cardiac modulation by the autonomous nervous system. If allowed to persist, these acute effects may lead to the development of cardiometabolic diseases in the long term. Here, we discuss the evidence for the contributions of circadian disruption and associated sleep disturbances to the risk of metabolic and cardiovascular health problems in shift workers. Improving the understanding of the physiological mechanisms affected by circadian misalignment and sleep disturbance will contribute to the development and implementation of strategies that prevent or mitigate the cardiometabolic impact of shift work.
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Affiliation(s)
- Laura Kervezee
- Centre for Study and Treatment of Circadian Rhythms, Department of Psychiatry, Douglas Mental Health University Institute, McGill University, Montreal, Quebec, Canada
| | - Anastasi Kosmadopoulos
- Centre for Study and Treatment of Circadian Rhythms, Department of Psychiatry, Douglas Mental Health University Institute, McGill University, Montreal, Quebec, Canada
| | - Diane B Boivin
- Centre for Study and Treatment of Circadian Rhythms, Department of Psychiatry, Douglas Mental Health University Institute, McGill University, Montreal, Quebec, Canada
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Climie RE, Grace MS, Larsen RL, Dempsey PC, Oberoi J, Cohen ND, Owen N, Kingwell BA, Dunstan DW. Regular brief interruptions to sitting after a high-energy evening meal attenuate glycemic excursions in overweight/obese adults. Nutr Metab Cardiovasc Dis 2018; 28:909-916. [PMID: 30111495 DOI: 10.1016/j.numecd.2018.05.009] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/18/2018] [Revised: 05/17/2018] [Accepted: 05/21/2018] [Indexed: 02/07/2023]
Abstract
BACKGROUND AND AIMS Modern Western lifestyles are characterized by consumption of approximately 45% of total daily energy intake at the evening meal, followed by prolonged sitting while watching television (TV), which may deleteriously impact glycemic control. After a high-energy evening meal (dinner), we examined whether regular, brief activity bouts during TV commercial breaks could acutely lower postprandial glucose and insulin responses in overweight/obese adults, compared to prolonged uninterrupted sitting. METHODS AND RESULTS Nine overweight/obese adults (29.7 ± 4.06 kg m-2; aged 32 ± 3 years; 5 male) completed two laboratory-based conditions of three and a half hours: prolonged sitting during TV viewing (SIT); and, prolonged sitting interrupted every 20 min with 3 min of light-intensity body-weight resistance activities (active commercial breaks; ACBs). Venous postprandial glucose and insulin responses to dinner were calculated as positive incremental area under the curve (iAUC) from baseline. Interstitial glucose was measured using a continuous glucose monitor and quantified as total AUC (tAUC). Compared to SIT, plasma glucose iAUC was reduced by 33% [3.4 ± 1.0 vs 5.1 ± 1.0 (mean ± SEM) mmol h·L-1, p = 0.019] and plasma insulin iAUC by 41% (813 ± 224 vs 1373 ± 224, p = 0.033 pmol h·L-1) for the ACB condition. During the ACB condition there was a significant reduction in interstitial glucose tAUC (24.4 ± 5.2 vs 26.9 ± 5.2 mmol h·L-1, p < 0.001), but this did not persist beyond the laboratory observation period. CONCLUSIONS Regular brief light-intensity activity bouts can attenuate glycemic responses during television viewing time following a high-energy evening meal in overweight/obese adults.
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Affiliation(s)
- R E Climie
- Baker Heart and Diabetes Institute, Melbourne, Australia; Menzies Institute for Medical Research, University of Tasmania, Hobart, Australia.
| | - M S Grace
- Baker Heart and Diabetes Institute, Melbourne, Australia; Department of Physiology, School of Medicine, Nursing and Health Sciences, Monash University, Melbourne, Australia; Health Innovations Research Institute, RMIT University, Melbourne, Australia
| | - R L Larsen
- Baker Heart and Diabetes Institute, Melbourne, Australia
| | - P C Dempsey
- Baker Heart and Diabetes Institute, Melbourne, Australia; Swinburne University of Technology, Melbourne, Australia
| | - J Oberoi
- Baker Heart and Diabetes Institute, Melbourne, Australia
| | - N D Cohen
- Baker Heart and Diabetes Institute, Melbourne, Australia
| | - N Owen
- Baker Heart and Diabetes Institute, Melbourne, Australia; Swinburne University of Technology, Melbourne, Australia
| | - B A Kingwell
- Baker Heart and Diabetes Institute, Melbourne, Australia; Central Clinical School and Department of Physiology, School of Medicine, Nursing & Health Services, Monash University, Melbourne, Australia
| | - D W Dunstan
- School of Public Health, University of Queensland, Brisbane, Australia; Mary MacKillop Institute of Health Research, Australian Catholic University, Melbourne, Australia; School of Public Health and Preventive Medicine, Monash University, Melbourne, Australia; School of Exercise and Nutrition Sciences, Deakin University, Burwood, Australia; School of Sport Science, Exercise and Health, The University of Western Australia, Perth, Australia
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Gibson R. Working hours and cardiometabolic health - an emerging area of nutritional research. NUTR BULL 2018. [DOI: 10.1111/nbu.12337] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- R. Gibson
- Department of Nutritional Sciences; King's College London; London UK
- Department of Epidemiology and Biostatistics; Imperial College London; London UK
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Circadian Rhythm and Alzheimer's Disease. Med Sci (Basel) 2018; 6:medsci6030052. [PMID: 29933646 PMCID: PMC6164904 DOI: 10.3390/medsci6030052] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2018] [Revised: 06/19/2018] [Accepted: 06/19/2018] [Indexed: 12/14/2022] Open
Abstract
Alzheimer’s disease (AD) is a neurodegenerative disorder with a growing epidemiological importance characterized by significant disease burden. Sleep-related pathological symptomatology often accompanies AD. The etiology and pathogenesis of disrupted circadian rhythm and AD share common factors, which also opens the perspective of viewing them as a mutually dependent process. This article focuses on the bi-directional relationship between these processes, discussing the pathophysiological links and clinical aspects. Common mechanisms linking both processes include neuroinflammation, neurodegeneration, and circadian rhythm desynchronization. Timely recognition of sleep-specific symptoms as components of AD could lead to an earlier and correct diagnosis with an opportunity of offering treatments at an earlier stage. Likewise, proper sleep hygiene and related treatments ought to be one of the priorities in the management of the patient population affected by AD. This narrative review brings a comprehensive approach to clearly demonstrate the underlying complexities linking AD and circadian rhythm disruption. Most clinical data are based on interventions including melatonin, but larger-scale research is still scarce. Following a pathophysiological reasoning backed by evidence gained from AD models, novel anti-inflammatory treatments and those targeting metabolic alterations in AD might prove useful for normalizing a disrupted circadian rhythm. By restoring it, benefits would be conferred for immunological, metabolic, and behavioral function in an affected individual. On the other hand, a balanced circadian rhythm should provide greater resilience to AD pathogenesis.
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Bescos R, Boden MJ, Jackson ML, Trewin AJ, Marin EC, Levinger I, Garnham A, Hiam DS, Falcao-Tebas F, Conte F, Owens J, Kennaway DJ, McConell GK. Four days of simulated shift work reduces insulin sensitivity in humans. Acta Physiol (Oxf) 2018; 223:e13039. [PMID: 29356345 DOI: 10.1111/apha.13039] [Citation(s) in RCA: 39] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2017] [Revised: 01/15/2018] [Accepted: 01/16/2018] [Indexed: 01/30/2023]
Abstract
AIM The aim of this study was to investigate the effects of 4 consecutive simulated night shifts on glucose homeostasis, mitochondrial function and central and peripheral rhythmicities compared with a simulated day shift schedule. METHODS Seventeen healthy adults (8M:9F) matched for sleep, physical activity and dietary/fat intake participated in this study (night shift work n = 9; day shift work n = 8). Glucose tolerance and insulin sensitivity before and after 4 nights of shift work were measured by an intravenous glucose tolerance test and a hyperinsulinaemic euglycaemic clamp respectively. Muscles biopsies were obtained to determine insulin signalling and mitochondrial function. Central and peripheral rhythmicities were assessed by measuring salivary melatonin and expression of circadian genes from hair samples respectively. RESULTS Fasting plasma glucose increased (4.4 ± 0.1 vs. 4.6 ± 0.1 mmol L-1 ; P = .001) and insulin sensitivity decreased (25 ± 7%, P < .05) following the night shift, with no changes following the day shift. Night shift work had no effect on skeletal muscle protein expression (PGC1α, UCP3, TFAM and mitochondria Complex II-V) or insulin-stimulated pAkt Ser473, pTBC1D4Ser318 and pTBC1D4Thr642. Importantly, the metabolic changes after simulated night shifts occurred despite no changes in the timing of melatonin rhythmicity or hair follicle cell clock gene expression across the wake period (Per3, Per1, Nr1d1 and Nr1d2). CONCLUSION Only 4 days of simulated night shift work in healthy adults is sufficient to reduce insulin sensitivity which would be expected to increase the risk of T2D.
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Affiliation(s)
- R. Bescos
- Institute of Sport, Exercise and Active Living (ISEAL); Victoria University; Melbourne Vic. Australia
- Institute of Health & Community; Faculty of Health & Human Sciences; University of Plymouth; Plymouth UK
| | - M. J. Boden
- Robinson Research Institute and Adelaide School of Medicine; University of Adelaide; Adelaide SA Australia
- Syneos Health; Hindmarsh SA Australia
| | - M. L. Jackson
- College of Arts; Victoria University; Melbourne Vic. Australia
- School of Health and Biomedical Sciences; RMIT University; Bundoora Vic. Australia
| | - A. J. Trewin
- Institute of Sport, Exercise and Active Living (ISEAL); Victoria University; Melbourne Vic. Australia
- Department of Anesthesiology; University of Rochester Medical Center; Rochester NY USA
| | - E. C. Marin
- Institute of Sport, Exercise and Active Living (ISEAL); Victoria University; Melbourne Vic. Australia
- Department of Medicine (Austin Health); Austin Hospital; The University of Melbourne; Melbourne Victoria Australia
| | - I. Levinger
- Institute of Sport, Exercise and Active Living (ISEAL); Victoria University; Melbourne Vic. Australia
- Australian Institute for Musculoskeletal Science (AIMSS); Western Health; Melbourne Australia
| | - A. Garnham
- School of Exercise and Nutrition Sciences; Deakin University; Melbourne Vic. Australia
| | - D. S. Hiam
- Institute of Sport, Exercise and Active Living (ISEAL); Victoria University; Melbourne Vic. Australia
| | - F. Falcao-Tebas
- Institute of Sport, Exercise and Active Living (ISEAL); Victoria University; Melbourne Vic. Australia
| | - F. Conte
- Institute of Sport, Exercise and Active Living (ISEAL); Victoria University; Melbourne Vic. Australia
| | - J. A. Owens
- Robinson Research Institute and Adelaide School of Medicine; University of Adelaide; Adelaide SA Australia
| | - D. J. Kennaway
- Robinson Research Institute and Adelaide School of Medicine; University of Adelaide; Adelaide SA Australia
| | - G. K. McConell
- Institute of Sport, Exercise and Active Living (ISEAL); Victoria University; Melbourne Vic. Australia
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Bonham MP, Leung GKW, Davis R, Sletten TL, Murgia C, Young MJ, Eikelis N, Lambert EA, Huggins CE. Does modifying the timing of meal intake improve cardiovascular risk factors? Protocol of an Australian pilot intervention in night shift workers with abdominal obesity. BMJ Open 2018; 8:e020396. [PMID: 29540423 PMCID: PMC5857653 DOI: 10.1136/bmjopen-2017-020396] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
INTRODUCTION Shift work is an independent risk factor for cardiovascular disease (CVD). Shift workers who are awake overnight and sleep during the day are misaligned with their body's endogenous circadian rhythm. Eating at night contributes to this increased risk of CVD by forcing the body to actively break down and process nutrients at night. This pilot study aims to determine whether altering meal timing overnight, in a shift working population, will impact favourably on modifiable risk factors for CVD (postprandial bplasma lipids and glucose concentration). METHODS AND ANALYSIS A randomised cross-over study with two 4-week test periods, separated by a minimum of a 2-week washout will be undertaken. The effectiveness of redistributing energy intake overnight versus ad libitum eating patterns on CVD risk factors will be examined in night shift workers (n=20), using a standard acute test meal challenge protocol. Primary outcomes (postprandial lipids and glucose) will be compared between the two conditions: post-intervention and post-control period using analysis of variance. Potential effect size estimates to inform sample size calculations for a main trial will also be generated. ETHICS AND DISSEMINATION Ethics approval has been granted by the Monash University Human Research Ethics Committee (2017-8619-10329). Outcomes from this study will determine whether eliminating food intake for a defined period at night (1-6 am) impacts favourably on metabolic risk factors for CVD in night shift workers. Collective results from this novel trial will be disseminated through peer-reviewed journals, and national and international presentations. The results are essential to inform health promotion policies and guidelines for shift workers, especially those who aim to improve their metabolic health. TRIAL REGISTRATION NUMBER ACTRN12617000791336; Pre-results.
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Affiliation(s)
- Maxine P Bonham
- Department of Nutrition, Dietetics and Food, Monash University, Notting Hill, Victoria, Australia
| | - Gloria K W Leung
- Department of Nutrition, Dietetics and Food, Monash University, Notting Hill, Victoria, Australia
| | - Rochelle Davis
- Department of Nutrition, Dietetics and Food, Monash University, Notting Hill, Victoria, Australia
| | - Tracey L Sletten
- Monash Institute of Cognitive and Clinical Neurosciences, School of Psychological Sciences, Monash University, Notting Hill, Victoria, Australia
- Cooperative Research Centre for Alertness, Safety and Productivity, Notting Hill, Victoria, Australia
| | - Chiara Murgia
- Department of Nutrition, Dietetics and Food, Monash University, Notting Hill, Victoria, Australia
| | - Morag J Young
- Hudson Institute of Medical Research, Clayton, Victoria, Australia
| | - Nina Eikelis
- Iverson Health Innovation Research Institute, Swinburne University of Technology, Hawthorn, Victoria, Australia
- Baker Heart and Diabetes Institute, Melbourne, Victoria, Australia
| | - Elisabeth A Lambert
- Iverson Health Innovation Research Institute, Swinburne University of Technology, Hawthorn, Victoria, Australia
- Department of Physiology, Monash University, Clayton, Australia
| | - Catherine E Huggins
- Department of Nutrition, Dietetics and Food, Monash University, Notting Hill, Victoria, Australia
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Murray M, Dordevic AL, Ryan L, Bonham MP. The Impact of a Single Dose of a Polyphenol-Rich Seaweed Extract on Postprandial Glycaemic Control in Healthy Adults: A Randomised Cross-Over Trial. Nutrients 2018; 10:E270. [PMID: 29495492 PMCID: PMC5872688 DOI: 10.3390/nu10030270] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2018] [Revised: 02/19/2018] [Accepted: 02/22/2018] [Indexed: 01/09/2023] Open
Abstract
This study investigated the impact of a polyphenol-rich seaweed extract on postprandial glycaemia in healthy adults, and, as a secondary outcome, the influence of ethnicity on these outcomes. Thirty-eight volunteers (26 non-Asian, 12 Asian) aged 19 to 56 years participated in this double-blind, placebo-controlled, randomised cross-over trial. Participants each consumed a low (500 mg), and high (2000 mg) dose of the polyphenol-rich brown seaweed (Fucus vesiculosus) extract, as well as a cellulose placebo (2000 mg), 30 min prior to 50 g of available carbohydrate from white bread. Postprandial blood glucose and plasma insulin concentrations were measured over two hours (fasting, 15, 30, 45, 60, 90, and 120 min) from a finger prick blood sample. Data were analysed using a repeated measures analysis of variance. Compared with the placebo, neither dose had a lowering effect on postprandial glucose or insulin responses. However, individuals of an Asian background experienced consistently elevated plasma insulin responses, assessed using an incremental area under the curve, compared with non-Asian participants, irrespective of supplement (p = 0.016). These results suggest an increased risk of insulin resistance among Asian populations, compared with non-Asian, and that measurement of blood glucose levels alone may be insufficient to diagnose diabetes risk in this population.
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Affiliation(s)
- Margaret Murray
- Department of Nutrition, Dietetics and Food, Monash University, Level 1, 264 Ferntree Gully Road, Notting Hill, VIC 3168, Australia.
| | - Aimee L Dordevic
- Department of Nutrition, Dietetics and Food, Monash University, Level 1, 264 Ferntree Gully Road, Notting Hill, VIC 3168, Australia.
| | - Lisa Ryan
- Department of Natural Sciences, Galway-Mayo Institute of Technology, Dublin Road, Galway H91 T8NW, Ireland.
| | - Maxine P Bonham
- Department of Nutrition, Dietetics and Food, Monash University, Level 1, 264 Ferntree Gully Road, Notting Hill, VIC 3168, Australia.
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Su Y, Foppen E, Mansur Machado FS, Fliers E, Kalsbeek A. The role of the daily feeding rhythm in the regulation of the day/night rhythm in triglyceride secretion in rats. Chronobiol Int 2018; 35:885-895. [PMID: 29446660 DOI: 10.1080/07420528.2018.1438456] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
Plasma triglyceride (TG) levels show a clear daily rhythm, however, thus far it is still unknown whether this rhythm results from a daily rhythm in TG production, TG uptake or both. Previous studies have shown that feeding activity affects plasma TG concentrations, but it is not clear how the daily rhythm in feeding activity affects plasma TG concentrations. In the present study, we measured plasma TG concentrations and TG secretion rates in rats at 6 Zeitgeber times to investigate whether plasma TG concentrations and TG secretion show a daily rhythm. We found that plasma TG concentrations and TG secretion show a significant day/night rhythm. Next, we removed the daily rhythm in feeding behavior by introducing a 6-meals-a-day (6M) feeding schedule to investigate whether the daily rhythm in feeding behavior is necessary to maintain the daily rhythm in TG secretion. We found that the day/night rhythm in TG secretion was abolished under 6M feeding conditions. Hepatic apolipoprotein B (ApoB) and microsomal TG transfer protein (Mttp), which are both involved in TG secretion, also lost their daily rhythmicity under 6M feeding conditions. Together, these results indicate that: (1) the daily rhythm in TG secretion contributes to the formation of a day/night rhythm in plasma TG levels and (2) a daily feeding rhythm is essential for maintaining the daily rhythm in TG secretion.
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Affiliation(s)
- Yan Su
- a Hypothalamic Integration Mechanisms , Netherlands Institute for Neuroscience , Amsterdam , The Netherlands
| | - Ewout Foppen
- b Department of Endocrinology and Metabolism , Academic Medical Center (AMC), University of Amsterdam , Amsterdam , The Netherlands
| | | | - Eric Fliers
- b Department of Endocrinology and Metabolism , Academic Medical Center (AMC), University of Amsterdam , Amsterdam , The Netherlands
| | - Andries Kalsbeek
- a Hypothalamic Integration Mechanisms , Netherlands Institute for Neuroscience , Amsterdam , The Netherlands.,b Department of Endocrinology and Metabolism , Academic Medical Center (AMC), University of Amsterdam , Amsterdam , The Netherlands
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Khalyfa A, Poroyko VA, Qiao Z, Gileles-Hillel A, Khalyfa AA, Akbarpour M, Almendros I, Farré R, Gozal D. Exosomes and Metabolic Function in Mice Exposed to Alternating Dark-Light Cycles Mimicking Night Shift Work Schedules. Front Physiol 2017; 8:882. [PMID: 29163218 PMCID: PMC5673652 DOI: 10.3389/fphys.2017.00882] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2017] [Accepted: 10/18/2017] [Indexed: 12/30/2022] Open
Abstract
Sleep is an important modulator of metabolic function. Disruptions of sleep in circadian rhythm are common in modern societies and are associated with increased risk of developing cardiometabolic disorders. Exosomes are ubiquitous extracellular vesicles that may play a mechanistic role in metabolic derangements. We hypothesized that alternating dark-light cycles mimicking shift work in mice would alter fecal microbiota and colonic epithelium permeability and alter plasma exosome cargo and metabolic function. C57BL/6 mice were randomly assigned to (i) control day light (CL), or (ii) inverted dark-light every 2 weeks for 8 weeks (IN). Body weight, fat mass and HOMA-IR were measured, along with Tregs, metabolic, and resident macrophages in visceral white adipose tissue (vWAT). Fecal water samples were incubated with confluent colonic epithelium cell cultures in electric cell-substrate impedance sensing (ECIS) arrays, and plasma exosomes were added to differentiated adipocytes and insulin-induced pAKT/AKT expression changes were assessed by western blots. Mice exposed to IN showed elevated HOMA-IR, and their fecal samples showed altered microbiota which promote increased permeability of the colonic epithelial cell barrier. Plasma exosomes decreased pAKT/AKT responses to exogenous insulin compared to CL, and altered expression of circadian clock genes. Inflammatory macrophages (Ly-6chigh) were increased in IN-exposed vWAT, while Tregs were decreased. Thus, gut microbiota and the cargo of plasma exosomes are altered by periodic shifts in environmental lighting, and effectively alter metabolic function, possibly via induction of systemic inflammation and altered clock expression in target tissues. Further exploration of exosomal miRNA signatures in shift workers and their putative metabolic organ cell targets appears warranted.
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Affiliation(s)
- Abdelnaby Khalyfa
- Section of Pediatric Sleep Medicine, Department of Pediatrics, Pritzker School of Medicine, Biological Sciences Division, University of Chicago, Chicago, IL, United States
| | - Valeriy A Poroyko
- Section of Pediatric Sleep Medicine, Department of Pediatrics, Pritzker School of Medicine, Biological Sciences Division, University of Chicago, Chicago, IL, United States
| | - Zhuanhong Qiao
- Section of Pediatric Sleep Medicine, Department of Pediatrics, Pritzker School of Medicine, Biological Sciences Division, University of Chicago, Chicago, IL, United States
| | - Alex Gileles-Hillel
- Section of Pediatric Sleep Medicine, Department of Pediatrics, Pritzker School of Medicine, Biological Sciences Division, University of Chicago, Chicago, IL, United States
| | - Ahamed A Khalyfa
- Section of Pediatric Sleep Medicine, Department of Pediatrics, Pritzker School of Medicine, Biological Sciences Division, University of Chicago, Chicago, IL, United States
| | - Mahzad Akbarpour
- Section of Pediatric Sleep Medicine, Department of Pediatrics, Pritzker School of Medicine, Biological Sciences Division, University of Chicago, Chicago, IL, United States
| | - Isaac Almendros
- Unitat de Biofísica i Bioenginyeria, Facultat de Medicina i Ciències de la Salut, Universitat de Barcelona, Barcelona, Spain.,CIBER de Enfermedades Respiratorias, Madrid, Spain.,Institut d'investigacions Biomèdiques August Pi i Sunyer, Barcelona, Spain
| | - Ramon Farré
- Unitat de Biofísica i Bioenginyeria, Facultat de Medicina i Ciències de la Salut, Universitat de Barcelona, Barcelona, Spain.,CIBER de Enfermedades Respiratorias, Madrid, Spain.,Institut d'investigacions Biomèdiques August Pi i Sunyer, Barcelona, Spain
| | - David Gozal
- Section of Pediatric Sleep Medicine, Department of Pediatrics, Pritzker School of Medicine, Biological Sciences Division, University of Chicago, Chicago, IL, United States
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46
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Beccuti G, Monagheddu C, Evangelista A, Ciccone G, Broglio F, Soldati L, Bo S. Timing of food intake: Sounding the alarm about metabolic impairments? A systematic review. Pharmacol Res 2017; 125:132-141. [DOI: 10.1016/j.phrs.2017.09.005] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/31/2017] [Revised: 07/29/2017] [Accepted: 09/12/2017] [Indexed: 12/16/2022]
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47
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Grant CL, Coates AM, Dorrian J, Kennaway DJ, Wittert GA, Heilbronn LK, Pajcin M, Della Vedova C, Gupta CC, Banks S. Timing of food intake during simulated night shift impacts glucose metabolism: A controlled study. Chronobiol Int 2017. [DOI: 10.1080/07420528.2017.1335318] [Citation(s) in RCA: 46] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Crystal L. Grant
- Centre for Sleep Research, University of South Australia, Adelaide, SA, Australia
| | - Alison M. Coates
- Alliance for Research in Exercise, Nutrition and Activity, University of South Australia, Adelaide, SA, Australia
| | - Jillian Dorrian
- Centre for Sleep Research, University of South Australia, Adelaide, SA, Australia
| | - David J. Kennaway
- Robinson Research Institute and Adelaide School of Medicine, University of Adelaide, Adelaide, SA, Australia
| | - Gary A. Wittert
- Robinson Research Institute and Adelaide School of Medicine, University of Adelaide, Adelaide, SA, Australia
- South Australian Health and Medical Research Institute, Adelaide, SA, Australia
| | - Leonie K Heilbronn
- Robinson Research Institute and Adelaide School of Medicine, University of Adelaide, Adelaide, SA, Australia
- South Australian Health and Medical Research Institute, Adelaide, SA, Australia
| | - Maja Pajcin
- School of Pharmacy and Medical Sciences, University of South Australia, Adelaide, SA, Australia
| | - Chris Della Vedova
- School of Pharmacy and Medical Sciences, University of South Australia, Adelaide, SA, Australia
| | - Charlotte C. Gupta
- Centre for Sleep Research, University of South Australia, Adelaide, SA, Australia
| | - Siobhan Banks
- Centre for Sleep Research, University of South Australia, Adelaide, SA, Australia
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48
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Qin C, Gong Q, Wen Z, Zou Y, Yuan D, Shao T, Li H. Comparative analysis of the liver transcriptome of Pelteobagrus vachellii with an alternative feeding time. COMPARATIVE BIOCHEMISTRY AND PHYSIOLOGY D-GENOMICS & PROTEOMICS 2017; 22:131-138. [DOI: 10.1016/j.cbd.2017.04.001] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/27/2016] [Revised: 01/25/2017] [Accepted: 04/02/2017] [Indexed: 11/25/2022]
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49
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Balakrishnan M, El-Serag HB, Kanwal F, Thrift AP. Shiftwork Is Not Associated with Increased Risk of NAFLD: Findings from the National Health and Nutrition Examination Survey. Dig Dis Sci 2017; 62:526-533. [PMID: 27995401 DOI: 10.1007/s10620-016-4401-1] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/17/2016] [Accepted: 11/29/2016] [Indexed: 01/01/2023]
Abstract
AIMS There is increased focus on the metabolic impact of shiftwork, especially given the significant number of employees who work nighttime or rotating shifts. Nonalcoholic fatty liver disease (NAFLD) is the hepatic manifestation of the metabolic syndrome. We conducted a cross-sectional study to examine the association between shiftwork and the risk of NAFLD. METHODS We used aggregated data from the 2005-2006, 2007-2008, and 2009-2010 cycles of the National Health and Nutrition Examination Survey (NHANES). We defined NAFLD by elevated serum alanine aminotransferase (ALT) or aspartate aminotransferase (AST) levels (males: AST > 40 or ALT > 37; females: AST > 31 or ALT > 31) in the absence of excessive alcohol use and viral hepatitis. We defined shiftworkers as participants who self-reported currently working regular night shifts or rotating shifts. We calculated adjusted odds ratios (OR) and 95% confidence intervals (CI) using multivariable logistic regression. RESULTS Overall, 8159 participants aged 20-79 years reported working at a job or business using the NHANES Occupation Questionnaire and were included in the analysis. Of these, 11.1% were classified as shiftworkers. Compared to non-shiftworkers, shiftworkers were younger, were less likely to be non-Hispanic White, and have health insurance or health care. The overall prevalence of NAFLD was 15.7%. NAFLD occurred more frequently in shiftworkers (17.0%) than non-shiftworkers (15.5%). However, in the overall multivariable analysis, shiftwork was not associated with the risk of NAFLD (OR 1.11, 95% CI 0.87-1.43). CONCLUSIONS The findings from this NHANES-based cross-sectional study do not support an association between shiftwork and increased risk of NAFLD.
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Affiliation(s)
- Maya Balakrishnan
- Section of Gastroenterology and Hepatology, Department of Medicine, Baylor College of Medicine, One Baylor Plaza, Houston, TX, 77030, USA.
| | - Hashem B El-Serag
- Section of Gastroenterology and Hepatology, Department of Medicine, Baylor College of Medicine, One Baylor Plaza, Houston, TX, 77030, USA
- Department of Medicine, Houston VA HSR&D Center for Innovations in Quality, Effectiveness and Safety, Michael E. DeBakey Veterans Affairs Medical Center, Houston, TX, USA
| | - Fasiha Kanwal
- Section of Gastroenterology and Hepatology, Department of Medicine, Baylor College of Medicine, One Baylor Plaza, Houston, TX, 77030, USA
- Department of Medicine, Houston VA HSR&D Center for Innovations in Quality, Effectiveness and Safety, Michael E. DeBakey Veterans Affairs Medical Center, Houston, TX, USA
| | - Aaron P Thrift
- Section of Gastroenterology and Hepatology, Department of Medicine, Baylor College of Medicine, One Baylor Plaza, Houston, TX, 77030, USA
- Dan L Duncan Comprehensive Cancer Center, Baylor College of Medicine, Houston, TX, USA
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50
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St-Onge MP, Ard J, Baskin ML, Chiuve SE, Johnson HM, Kris-Etherton P, Varady K. Meal Timing and Frequency: Implications for Cardiovascular Disease Prevention: A Scientific Statement From the American Heart Association. Circulation 2017; 135:e96-e121. [PMID: 28137935 DOI: 10.1161/cir.0000000000000476] [Citation(s) in RCA: 407] [Impact Index Per Article: 58.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Eating patterns are increasingly varied. Typical breakfast, lunch, and dinner meals are difficult to distinguish because skipping meals and snacking have become more prevalent. Such eating styles can have various effects on cardiometabolic health markers, namely obesity, lipid profile, insulin resistance, and blood pressure. In this statement, we review the cardiometabolic health effects of specific eating patterns: skipping breakfast, intermittent fasting, meal frequency (number of daily eating occasions), and timing of eating occasions. Furthermore, we propose definitions for meals, snacks, and eating occasions for use in research. Finally, data suggest that irregular eating patterns appear less favorable for achieving a healthy cardiometabolic profile. Intentional eating with mindful attention to the timing and frequency of eating occasions could lead to healthier lifestyle and cardiometabolic risk factor management.
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