151
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Abstract
Physiological function, disease expression and drug effects vary by time-of-day. Clock disruption in mice results in cardio-metabolic, immunological and neurological dysfunction; circadian misalignment using forced desynchrony increases cardiovascular risk factors in humans. Here we integrated data from remote sensors, physiological and multi-omics analyses to assess the feasibility of detecting time dependent signals - the chronobiome – despite the “noise” attributable to the behavioral differences of free-living human volunteers. The majority (62%) of sensor readouts showed time-specific variability including the expected variation in blood pressure, heart rate, and cortisol. While variance in the multi-omics is dominated by inter-individual differences, temporal patterns are evident in the metabolome (5.4% in plasma, 5.6% in saliva) and in several genera of the oral microbiome. This demonstrates, despite a small sample size and limited sampling, the feasibility of characterizing at scale the human chronobiome “in the wild”. Such reference data at scale are a prerequisite to detect and mechanistically interpret discordant data derived from patients with temporal patterns of disease expression, to develop time-specific therapeutic strategies and to refine existing treatments.
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152
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Weiss N, Attali V, Bouzbib C, Thabut D. Altered distal-proximal temperature gradient as a possible explanation for sleep-wake disturbances in cirrhotic patients. Liver Int 2017; 37:1776-1779. [PMID: 29149489 DOI: 10.1111/liv.13590] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Nicolas Weiss
- Sorbonne Universités, Université Pierre et Marie Curie Paris 6, Paris, France.,Brain Liver Pitié-Salpêtrière (BLIPS) Study Group, Groupement Hospitalier Pitié-Salpêtrière-Charles Foix, Assistance Publique - Hôpitaux de Paris, Paris, France.,INSERM UMR_S 938, CDR Saint-Antoine Maladies métaboliques, Biliaires et fibro-inflammatoire du foie & Institut de Cardiométabolisme et Nutrition, ICAN, Paris, France.,Unité de réanimation neurologique, Département de neurologie, pôle des maladies du système nerveux, Groupement Hospitalier Pitié-Salpêtrière-Charles Foix, Assistance Publique - Hôpitaux de Paris et Institut de neurosciences translationnelles IHU-A-ICM, Paris, France
| | - Valérie Attali
- Sorbonne Universités, Université Pierre et Marie Curie Paris 6, Paris, France.,Service d'Exploration des Pathologies du Sommeil (Département "R3S"), Groupement Hospitalier Pitié-Salpêtrière-Charles Foix, Assistance Publique - Hôpitaux de Paris& Sorbonne Universités, UPMC Université Paris 06, INSERM, UMRS1158 Neurophysiologie Respiratoire Expérimentale et Clinique, Paris, France
| | - Charlotte Bouzbib
- Sorbonne Universités, Université Pierre et Marie Curie Paris 6, Paris, France.,Brain Liver Pitié-Salpêtrière (BLIPS) Study Group, Groupement Hospitalier Pitié-Salpêtrière-Charles Foix, Assistance Publique - Hôpitaux de Paris, Paris, France.,INSERM UMR_S 938, CDR Saint-Antoine Maladies métaboliques, Biliaires et fibro-inflammatoire du foie & Institut de Cardiométabolisme et Nutrition, ICAN, Paris, France.,Unité de Soins Intensifs d'Hépato-gastroentérologie, Groupement Hospitalier Pitié-Salpêtrière-Charles Foix, Assistance Publique - Hôpitaux de Paris, Paris, France
| | - Dominique Thabut
- Sorbonne Universités, Université Pierre et Marie Curie Paris 6, Paris, France.,Brain Liver Pitié-Salpêtrière (BLIPS) Study Group, Groupement Hospitalier Pitié-Salpêtrière-Charles Foix, Assistance Publique - Hôpitaux de Paris, Paris, France.,INSERM UMR_S 938, CDR Saint-Antoine Maladies métaboliques, Biliaires et fibro-inflammatoire du foie & Institut de Cardiométabolisme et Nutrition, ICAN, Paris, France.,Unité de Soins Intensifs d'Hépato-gastroentérologie, Groupement Hospitalier Pitié-Salpêtrière-Charles Foix, Assistance Publique - Hôpitaux de Paris, Paris, France
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153
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Zohal M, Ghorbani A, Esmailzadehha N, Ziaee A, Mohammadi Z. Association of sleep quality components and wake time with metabolic syndrome: The Qazvin Metabolic Diseases Study (QMDS), Iran. Diabetes Metab Syndr 2017; 11 Suppl 1:S377-S380. [PMID: 28284911 DOI: 10.1016/j.dsx.2017.03.020] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/28/2016] [Accepted: 03/03/2017] [Indexed: 12/31/2022]
Abstract
PURPOSE The aim of this study was to determine the association of sleep quality and sleep quantity with metabolic syndrome in Qazvin, Iran. METHODS this cross sectional study was conducted in 1079 residents of Qazvin selected by multistage cluster random sampling method in 2011. Metabolic syndrome was defined according to the criteria proposed by the national cholesterol education program third Adult treatment panel. Sleep was assessed using the Pittsburgh sleep quality index (PSQI). A logistic regression analysis was used to examine the association of sleep status and metabolic syndrome. RESULTS Mean age was 40.08±10.33years. Of 1079, 578 (52.2%) were female, and 30.6% had metabolic syndrome. The total global PSQI score in the subjects with metabolic syndrome was significantly higher than subjects without metabolic syndrome (6.30±3.20 vs. 5.83±2.76, P=0.013). In logistic regression analysis, sleep disturbances was associated with 1.388 fold increased risk of metabolic syndrome after adjustment for age, gender, and body mass index. CONCLUSION Sleep disturbances component was a predictor of metabolic syndrome in the present study. More longitudinal studies are necessary to understand the association of sleep quality and its components with metabolic syndrome.
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Affiliation(s)
- Mohammadali Zohal
- Metabolic Diseases Research Center, Qazvin University of Medical Sciences, Qazvin, Iran
| | - Azam Ghorbani
- Metabolic Diseases Research Center, Qazvin University of Medical Sciences, Qazvin, Iran; School of Nursing & Midwifery, Qazvin University of Medical Sciences, Qazvin, Iran.
| | - Neda Esmailzadehha
- Metabolic Diseases Research Center, Qazvin University of Medical Sciences, Qazvin, Iran
| | - Amir Ziaee
- Growth and Development Research Center, Iran University of Medical Sciences, Tehran, Iran; Metabolic Diseases Research Center, Qazvin University of Medical Sciences, Qazvin, Iran
| | - Zahrasadat Mohammadi
- Metabolic Diseases Research Center, Qazvin University of Medical Sciences, Qazvin, Iran
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154
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Lu C, Sun H, Huang J, Yin S, Hou W, Zhang J, Wang Y, Xu Y, Xu H. Long-Term Sleep Duration as a Risk Factor for Breast Cancer: Evidence from a Systematic Review and Dose-Response Meta-Analysis. BIOMED RESEARCH INTERNATIONAL 2017; 2017:4845059. [PMID: 29130041 PMCID: PMC5654282 DOI: 10.1155/2017/4845059] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/03/2017] [Revised: 08/11/2017] [Accepted: 08/23/2017] [Indexed: 11/18/2022]
Abstract
Sleep patterns have been associated with the development of cancers, although the association between sleep duration and breast cancer remains controversial. The purpose of our study was to explore the relationship between sleep duration and breast cancer risk. The PubMed and Web of Science databases were searched, and restricted cubic splines were used to explore the dose-response relationship. Data from 415,865 participants were derived from 10 studies. A J-shaped nonlinear trend was found between sleep duration and breast cancer incidence (Pnon-linear = 0.012); compared with the reference hours (6 h or 7 h), with increasing sleep hours, the risk of breast cancer increased (Ptrend = 0.028). Moreover, a nonlinear relationship was found between sleep duration and estrogen receptor-positive breast cancer (Pnon-linear = 0.013); the risk of estrogen receptor-positive breast cancer increased with increasing sleep hours compared to the reference hours (Ptrend = 0.024). However, no nonlinear relationship was found between sleep duration and estrogen receptor-negative breast cancer; the risk of estrogen receptor-negative breast cancer was 1.035 for every additional sleep hour. Compared to women with the reference number of sleep hours, women with a longer sleep duration might have a significantly increased risk of breast cancer, especially estrogen receptor-positive breast cancer.
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Affiliation(s)
- Chunyang Lu
- Department of Surgical Oncology and General Surgery, The First Hospital of China Medical University, No. 155 Nanjing North Street, Heping District, Shenyang, Liaoning Province 110001, China
| | - Hao Sun
- Department of Clinical Epidemiology and Evidence-Based Medicine, The First Hospital of China Medical University, No. 155 Nanjing North Street, Heping District, Shenyang, Liaoning Province 110001, China
| | - Jinyu Huang
- Department of Surgical Oncology and General Surgery, The First Hospital of China Medical University, No. 155 Nanjing North Street, Heping District, Shenyang, Liaoning Province 110001, China
| | - Songcheng Yin
- Department of Surgical Oncology and General Surgery, The First Hospital of China Medical University, No. 155 Nanjing North Street, Heping District, Shenyang, Liaoning Province 110001, China
| | - Wenbin Hou
- Department of Surgical Oncology and General Surgery, The First Hospital of China Medical University, No. 155 Nanjing North Street, Heping District, Shenyang, Liaoning Province 110001, China
| | - Junyan Zhang
- Department of Surgical Oncology and General Surgery, The First Hospital of China Medical University, No. 155 Nanjing North Street, Heping District, Shenyang, Liaoning Province 110001, China
| | - Yanshi Wang
- Department of Gynaecology, The First Hospital of China Medical University, No. 155 Nanjing North Street, Heping District, Shenyang, Liaoning Province 110001, China
| | - Yingying Xu
- Department of Breast Oncology and General Surgery, The First Hospital of China Medical University, No. 155 Nanjing North Street, Heping District, Shenyang, Liaoning Province 110001, China
| | - Huimian Xu
- Department of Surgical Oncology and General Surgery, The First Hospital of China Medical University, No. 155 Nanjing North Street, Heping District, Shenyang, Liaoning Province 110001, China
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155
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Abstract
Racial/ethnic minorities experience a disproportionate risk of both suboptimal sleep and obesity, and the relationship between sleep and obesity may differ by race/ethnicity for modifiable and non-modifiable reasons. Because many people of color have historically lived and continue to largely live in disadvantaged, obesogenic physical and social environments, these greater adverse exposures likely negatively affect sleep, resulting in physiological dysregulation. Physiological dysregulation may, in turn, lead to increased obesity risk and subsequent health consequences, which are likely more influential than potential genetic differences in race, a social construct. The purpose of this article is to describe potential environmental, genetic, and epigenetic determinants of racial/ethnic differences in the sleep-obesity relationship and to review current epidemiological findings regarding either racial/ethnic minority specific estimates of the association or disparities in the relationship. Using the socioecological framework as a conceptual model, I describe sleep and obesity as socially patterned and embedded in modifiable physical and social contexts with common causes that are influenced by upstream social conditions. I also provide examples of sleep and obesity-related studies that correspond with the downstream, intermediate, and upstream factors that likely contribute to commonly observed racial/ethnic disparities in the sleep-obesity relationship. The review concludes with broad recommendations for (1) advancing research methodology for epidemiological studies of disparities in the link between sleep and obesity, (2) future research topics, as well as (3) several broad policies and structures needed to address racial/ethnic disparities in sleep health and obesity.
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Affiliation(s)
- Chandra L Jackson
- Epidemiology Branch, National Institute of Environmental Health Sciences, National Institutes of Health, Department of Health and Human Services, Research Triangle Park, NC, USA.
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156
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Forrestel AC, Miedlich SU, Yurcheshen M, Wittlin SD, Sellix MT. Chronomedicine and type 2 diabetes: shining some light on melatonin. Diabetologia 2017; 60:808-822. [PMID: 27981356 DOI: 10.1007/s00125-016-4175-1] [Citation(s) in RCA: 44] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/01/2016] [Accepted: 11/18/2016] [Indexed: 12/19/2022]
Abstract
In mammals, the circadian timing system drives rhythms of physiology and behaviour, including the daily rhythms of feeding and activity. The timing system coordinates temporal variation in the biochemical landscape with changes in nutrient intake in order to optimise energy balance and maintain metabolic homeostasis. Circadian disruption (e.g. as a result of shift work or jet lag) can disturb this continuity and increase the risk of cardiometabolic disease. Obesity and metabolic disease can also disturb the timing and amplitude of the clock in multiple organ systems, further exacerbating disease progression. As our understanding of the synergy between the timing system and metabolism has grown, an interest has emerged in the development of novel clock-targeting pharmaceuticals or nutraceuticals for the treatment of metabolic dysfunction. Recently, the pineal hormone melatonin has received some attention as a potential chronotherapeutic drug for metabolic disease. Melatonin is well known for its sleep-promoting effects and putative activity as a chronobiotic drug, stimulating coordination of biochemical oscillations through targeting the internal timing system. Melatonin affects the insulin secretory activity of the pancreatic beta cell, hepatic glucose metabolism and insulin sensitivity. Individuals with type 2 diabetes mellitus have lower night-time serum melatonin levels and increased risk of comorbid sleep disturbances compared with healthy individuals. Further, reduced melatonin levels, and mutations and/or genetic polymorphisms of the melatonin receptors are associated with an increased risk of developing type 2 diabetes. Herein we review our understanding of molecular clock control of glucose homeostasis, detail the influence of circadian disruption on glucose metabolism in critical peripheral tissues, explore the contribution of melatonin signalling to the aetiology of type 2 diabetes, and discuss the pros and cons of melatonin chronopharmacotherapy in disease management.
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Affiliation(s)
- Andrew C Forrestel
- Division of Endocrinology, Diabetes and Metabolism, Department of Medicine, University of Rochester School of Medicine and Dentistry, 601 Elmwood Avenue, Box 693, Rochester, NY, 14642, USA
| | - Susanne U Miedlich
- Division of Endocrinology, Diabetes and Metabolism, Department of Medicine, University of Rochester School of Medicine and Dentistry, 601 Elmwood Avenue, Box 693, Rochester, NY, 14642, USA
| | - Michael Yurcheshen
- UR Medicine Sleep Center, Department of Neurology, University of Rochester School of Medicine and Dentistry, Rochester, NY, USA
| | - Steven D Wittlin
- Division of Endocrinology, Diabetes and Metabolism, Department of Medicine, University of Rochester School of Medicine and Dentistry, 601 Elmwood Avenue, Box 693, Rochester, NY, 14642, USA
| | - Michael T Sellix
- Division of Endocrinology, Diabetes and Metabolism, Department of Medicine, University of Rochester School of Medicine and Dentistry, 601 Elmwood Avenue, Box 693, Rochester, NY, 14642, USA.
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157
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Morris CJ, Purvis TE, Mistretta J, Hu K, Scheer FAJL. Circadian Misalignment Increases C-Reactive Protein and Blood Pressure in Chronic Shift Workers. J Biol Rhythms 2017; 32:154-164. [PMID: 28347188 DOI: 10.1177/0748730417697537] [Citation(s) in RCA: 89] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
Shift work is a risk factor for inflammation, hypertension, and cardiovascular disease. This increased risk cannot be fully explained by classical risk factors. Shift workers' behavioral and environmental cycles are typically misaligned relative to their endogenous circadian system. However, there is little information on the impact of acute circadian misalignment on cardiovascular disease risk in shift workers, independent of differences in work stress, food quality, and other factors that are likely to differ between night and day shifts. Thus, our objectives were to determine the independent effect of circadian misalignment on 24-h high-sensitivity C-reactive protein (hs-CRP; a marker of systemic inflammation) and blood pressure levels-cardiovascular disease risk factors-in chronic shift workers. Chronic shift workers undertook two 3-day laboratory protocols that simulated night work, comprising 12-hour inverted behavioral and environmental cycles (circadian misalignment) or simulated day work (circadian alignment), using a randomized, crossover design. Circadian misalignment increased 24-h hs-CRP by 11% ( p < 0.0001). Circadian misalignment increased 24-h systolic blood pressure (SBP) and diastolic blood pressure (DBP) by 1.4 mmHg and 0.8 mmHg, respectively (both p ≤ 0.038). The misalignment-mediated increase in 24-h SBP was primarily explained by an increase in SBP during the wake period (+1.7 mmHg; p = 0.017), whereas the misalignment-mediated increase in 24-h DBP was primarily explained by an increase in DBP during the sleep opportunity (+1.8 mmHg; p = 0.005). Circadian misalignment per se increases hs-CRP and blood pressure in shift workers. This may help explain the increased inflammation, hypertension, and cardiovascular disease risk in shift workers.
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Affiliation(s)
- Christopher J Morris
- Medical Chronobiology Program, Division of Sleep and Circadian Disorders, Departments of Medicine and Neurology, Brigham and Women's Hospital, Boston, Massachusetts.,Division of Sleep Medicine, Department of Medicine, Harvard Medical School, Boston, Massachusetts
| | - Taylor E Purvis
- Medical Chronobiology Program, Division of Sleep and Circadian Disorders, Departments of Medicine and Neurology, Brigham and Women's Hospital, Boston, Massachusetts
| | - Joseph Mistretta
- Medical Chronobiology Program, Division of Sleep and Circadian Disorders, Departments of Medicine and Neurology, Brigham and Women's Hospital, Boston, Massachusetts
| | - Kun Hu
- Medical Chronobiology Program, Division of Sleep and Circadian Disorders, Departments of Medicine and Neurology, Brigham and Women's Hospital, Boston, Massachusetts.,Division of Sleep Medicine, Department of Medicine, Harvard Medical School, Boston, Massachusetts
| | - Frank A J L Scheer
- Medical Chronobiology Program, Division of Sleep and Circadian Disorders, Departments of Medicine and Neurology, Brigham and Women's Hospital, Boston, Massachusetts.,Division of Sleep Medicine, Department of Medicine, Harvard Medical School, Boston, Massachusetts
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158
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Laing EE, Möller-Levet CS, Poh N, Santhi N, Archer SN, Dijk DJ. Blood transcriptome based biomarkers for human circadian phase. eLife 2017; 6. [PMID: 28218891 PMCID: PMC5318160 DOI: 10.7554/elife.20214] [Citation(s) in RCA: 95] [Impact Index Per Article: 13.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2016] [Accepted: 01/28/2017] [Indexed: 12/31/2022] Open
Abstract
Diagnosis and treatment of circadian rhythm sleep-wake disorders both require assessment of circadian phase of the brain’s circadian pacemaker. The gold-standard univariate method is based on collection of a 24-hr time series of plasma melatonin, a suprachiasmatic nucleus-driven pineal hormone. We developed and validated a multivariate whole-blood mRNA-based predictor of melatonin phase which requires few samples. Transcriptome data were collected under normal, sleep-deprivation and abnormal sleep-timing conditions to assess robustness of the predictor. Partial least square regression (PLSR), applied to the transcriptome, identified a set of 100 biomarkers primarily related to glucocorticoid signaling and immune function. Validation showed that PLSR-based predictors outperform published blood-derived circadian phase predictors. When given one sample as input, the R2 of predicted vs observed phase was 0.74, whereas for two samples taken 12 hr apart, R2 was 0.90. This blood transcriptome-based model enables assessment of circadian phase from a few samples. DOI:http://dx.doi.org/10.7554/eLife.20214.001
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Affiliation(s)
- Emma E Laing
- Department of Microbial Sciences, School of Biosciences and Medicine, Faculty of Health and Medical Sciences, University of Surrey, Guildford, United Kingdom
| | - Carla S Möller-Levet
- Bioinformatics Core Facility, Faculty of Health and Medical Sciences, University of Surrey, Guildford, United Kingdom
| | - Norman Poh
- Department of Computer Science, Faculty of Engineering and Physical Sciences, University of Surrey, Guildford, United Kingdom
| | - Nayantara Santhi
- Surrey Sleep Research Centre, School of Biosciences and Medicine, Faculty of Health and Medical Sciences, University of Surrey, Guildford, United Kingdom
| | - Simon N Archer
- Surrey Sleep Research Centre, School of Biosciences and Medicine, Faculty of Health and Medical Sciences, University of Surrey, Guildford, United Kingdom
| | - Derk-Jan Dijk
- Surrey Sleep Research Centre, School of Biosciences and Medicine, Faculty of Health and Medical Sciences, University of Surrey, Guildford, United Kingdom
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159
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Sleep duration and breast cancer prognosis: perspectives from the Women's Healthy Eating and Living Study. Breast Cancer Res Treat 2017; 162:581-589. [PMID: 28190251 DOI: 10.1007/s10549-017-4140-9] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2016] [Accepted: 02/02/2017] [Indexed: 10/20/2022]
Abstract
PURPOSE To examine whether baseline sleep duration or changes in sleep duration are associated with breast cancer prognosis among early-stage breast cancer survivors in the multi-center Women's Healthy Eating and Living Study. METHODS Data were collected from 1995 to 2010. Analysis included 3047 women. Sleep duration was self-reported at baseline and follow-up intervals. Cox proportional hazard models were used to investigate whether baseline sleep duration was associated with breast cancer recurrence, breast cancer-specific mortality, and all-cause mortality. Time-varying models investigated whether changes in sleep duration were associated with breast cancer prognosis. RESULTS Compared to women who slept 7-8 h/night at baseline, sleeping ≥9 h/night was associated with a 48% increased risk of breast cancer recurrence (Hazard ratio [HR] 1.48, 95% Confidence interval [CI] 1.01, 2.00), a 52% increased risk of breast cancer-specific mortality (HR 1.52, 95% CI 1.09, 2.13), and a 43% greater risk of all-cause mortality (HR 1.43, 95% CI 1.07, 1.92). Time-varying models showed analogous increased risk in those who inconsistently slept ≥9 h/night (all P < 0.05), but not in those who consistently slept ≥9 h/night. CONCLUSIONS Consistent long or short sleep, which may reflect inter-individual variability in the need for sleep, does not appear to influence prognosis among early-stage breast cancer survivors.
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160
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Yang L, Xu Z, He M, Yang H, Li X, Min X, Zhang C, Xu C, Angileri F, Légaré S, Yuan J, Miao X, Guo H, Yao P, Wu T, Zhang X. Sleep Duration and Midday Napping with 5-Year Incidence and Reversion of Metabolic Syndrome in Middle-Aged and Older Chinese. Sleep 2016; 39:1911-1918. [PMID: 27450688 DOI: 10.5665/sleep.6214] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2016] [Accepted: 06/23/2016] [Indexed: 12/13/2022] Open
Abstract
STUDY OBJECTIVES Prospective evidence on the association of sleep duration and midday napping with metabolic syndrome (MetS) is limited. We aimed to examine the associations of sleep duration and midday napping with risk of incidence and reversion of MetS and its components among a middle-aged and older Chinese population. METHODS We included 14,399 subjects from the Dongfeng-Tongji (DFTJ) Cohort Study (2008-2013) who were free of coronary heart disease, stroke, and cancer at baseline. Baseline data were obtained by questionnaires and health examinations. Odds ratios (ORs) and 95% confidence interval (CI) were derived from multivariate logistic regression models. RESULTS After controlling for potential covariates, longer sleep duration (≥ 9 h) was associated with a higher risk of MetS incidence (OR, 1.29; 95% CI, 1.08-1.55) and lower reversion of MetS (OR, 0.80; 95% CI, 0.66-0.96) compared with sleep duration of 7 to < 8 h; whereas shorter sleep duration (< 6 h) was not related to incidence or reversion of MetS. For midday napping, subjects with longer napping (≥ 90 min) was also associated with a higher risk of MetS incidence and a lower risk of MetS reversion compared with those with napping of 1 to < 30 min (OR, 1.48; 95% CI, 1.05-2.10 and OR, 0.70; 95% CI, 0.52-0.94, respectively). Significance for incidence or reversion of certain MetS components remained in shorter and longer sleepers but disappeared across napping categories. CONCLUSIONS Both longer sleep duration and longer midday napping were potential risk factors for MetS incidence, and concurrently exert adverse effects on MetS reversion.
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Affiliation(s)
- Liangle Yang
- Department of Occupational and Environmental Health and Ministry of Education Key Lab for Environment and Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Zengguang Xu
- Research Center for Translational Medicine, Shanghai East Hospital, Tongji University School of Medicine, Shanghai 200120, China
| | - Meian He
- Department of Occupational and Environmental Health and Ministry of Education Key Lab for Environment and Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Handong Yang
- Dongfeng Central Hospital, Dongfeng Motor Corporation and Hubei University of Medicine, Shiyan, China
| | - Xiulou Li
- Dongfeng Central Hospital, Dongfeng Motor Corporation and Hubei University of Medicine, Shiyan, China
| | - Xinwen Min
- Dongfeng Central Hospital, Dongfeng Motor Corporation and Hubei University of Medicine, Shiyan, China
| | - Ce Zhang
- Dongfeng Central Hospital, Dongfeng Motor Corporation and Hubei University of Medicine, Shiyan, China
| | - Chengwei Xu
- Dongfeng Central Hospital, Dongfeng Motor Corporation and Hubei University of Medicine, Shiyan, China.,Department of Cardiology, Renmin Hospital of Wuhan University, Wuhan, China
| | - Francesca Angileri
- Department of Occupational and Environmental Health and Ministry of Education Key Lab for Environment and Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Sébastien Légaré
- Department of Occupational and Environmental Health and Ministry of Education Key Lab for Environment and Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Jing Yuan
- Department of Occupational and Environmental Health and Ministry of Education Key Lab for Environment and Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Xiaoping Miao
- Department of Epidemiology and Statistics, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Huan Guo
- Department of Occupational and Environmental Health and Ministry of Education Key Lab for Environment and Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Ping Yao
- Department of Occupational and Environmental Health and Ministry of Education Key Lab for Environment and Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Tangchun Wu
- Department of Occupational and Environmental Health and Ministry of Education Key Lab for Environment and Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Xiaomin Zhang
- Department of Occupational and Environmental Health and Ministry of Education Key Lab for Environment and Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
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161
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Moon SH, Lee BJ, Kim SJ, Kim HC. Relationship between thyroid stimulating hormone and night shift work. Ann Occup Environ Med 2016; 28:53. [PMID: 27761265 PMCID: PMC5054581 DOI: 10.1186/s40557-016-0141-0] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2016] [Accepted: 09/28/2016] [Indexed: 01/30/2023] Open
Abstract
BACKGROUND Night shift work has well-known adverse effects on health. However, few studies have investigated the relationship between thyroid diseases and night shift work. This study aimed to examine night shift workers and their changes in thyroid stimulating hormones (TSH) levels over time. METHODS Medical check-up data (2011-2015) were obtained from 967 female workers at a university hospital in Incheon, Korea. Data regarding TSH levels were extracted from the records, and 2015 was used as a reference point to determine night shift work status. The relationships between TSH levels and night shift work in each year were analyzed using the general linear model (GLM). The generalized estimating equation (GEE) was used to evaluate the repeated measurements over the 5-year period. RESULTS The GEE analysis revealed that from 2011 to 2015, night shift workers had TSH levels that were 0.303 mIU/L higher than the levels of non-night shift workers (95 % CI: 0.087-0.519 mIU/L, p = 0.006) after adjusting for age and department. When we used TSH levels of 4.5 ≥ mIU/L to identify subclinical hypothyroidism, night shift workers exhibited a 1.399 fold higher risk of subclinical hypothyroidism (95 % CI: 1.050-1.863, p = 0.022), compared to their non-night shift counterparts. CONCLUSIONS This result of this study suggests that night shift workers may have an increased risk of thyroid diseases, compared to non-night shift workers.
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Affiliation(s)
- So-Hyun Moon
- Department of Occupational and Environmental Medicine, Inha University Hospital, Incheon, Republic of Korea ; Department of Social and Preventive Medicine, School of Medicine, Inha University, Incheon, Republic of Korea
| | - Bum-Joon Lee
- Department of Occupational and Environmental Medicine, Inha University Hospital, Incheon, Republic of Korea
| | - Seong-Jin Kim
- Department of Occupational and Environmental Medicine, Inha University Hospital, Incheon, Republic of Korea ; Department of Social and Preventive Medicine, School of Medicine, Inha University, Incheon, Republic of Korea
| | - Hwan-Cheol Kim
- Department of Occupational and Environmental Medicine, Inha University Hospital, Incheon, Republic of Korea ; Department of Occupational and Environmental Medicine, School of Medicine, Inha University, Incheon, Republic of Korea
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162
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Lam MTY, Grandner MA, Malhotra A. Lungs can tell time-a highlight from 2016 ATS session on clock genes, inflammation, immunology, and sleep. J Thorac Dis 2016; 8:S579-81. [PMID: 27606100 DOI: 10.21037/jtd.2016.07.36] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Michael T Y Lam
- Department of Internal Medicine, UCSD, San Diego, CA 92103, USA
| | - Michael A Grandner
- Department of Psychiatry, University of Arizona, Tucson, Arizona 85724-5002, USA
| | - Atul Malhotra
- Division of Pulmonary, Critical Care & Sleep Medicine, La Jolla, CA 92037, USA
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163
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Abstract
Emerging evidence has assigned an important role to sleep as a modulator of metabolic homeostasis. The impact of variations in sleep duration, sleep-disordered breathing, and chronotype to cardiometabolic function encompasses a wide array of perturbations spanning from obesity, insulin resistance, type 2 diabetes, the metabolic syndrome, and cardiovascular disease risk and mortality in both adults and children. Here, we critically and extensively review the published literature on such important issues and provide a comprehensive overview of the most salient pathophysiologic pathways underlying the links between sleep, sleep disorders, and cardiometabolic functioning.
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Affiliation(s)
- Dorit Koren
- Section of Adult and Pediatric Endocrinology, Diabetes, and Metabolism, Department of Medicine
- Section of Pediatric Sleep Medicine
| | - Magdalena Dumin
- Section of Adult and Pediatric Endocrinology, Diabetes, and Metabolism, Department of Medicine
| | - David Gozal
- Section of Pediatric Sleep Medicine
- Section of Pulmonology, Department of Pediatrics, Pritzker School of Medicine, Biological Sciences Division, The University of Chicago, Chicago, IL, USA
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164
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Agorastos A, Linthorst ACE. Potential pleiotropic beneficial effects of adjuvant melatonergic treatment in posttraumatic stress disorder. J Pineal Res 2016; 61:3-26. [PMID: 27061919 DOI: 10.1111/jpi.12330] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/16/2016] [Accepted: 04/05/2016] [Indexed: 12/21/2022]
Abstract
Loss of circadian rhythmicity fundamentally affects the neuroendocrine, immune, and autonomic system, similar to chronic stress and may play a central role in the development of stress-related disorders. Recent articles have focused on the role of sleep and circadian disruption in the pathophysiology of posttraumatic stress disorder (PTSD), suggesting that chronodisruption plays a causal role in PTSD development. Direct and indirect human and animal PTSD research suggests circadian system-linked neuroendocrine, immune, metabolic and autonomic dysregulation, linking circadian misalignment to PTSD pathophysiology. Recent experimental findings also support a specific role of the fundamental synchronizing pineal hormone melatonin in mechanisms of sleep, cognition and memory, metabolism, pain, neuroimmunomodulation, stress endocrinology and physiology, circadian gene expression, oxidative stress and epigenetics, all processes affected in PTSD. In the current paper, we review available literature underpinning a potentially beneficiary role of an add-on melatonergic treatment in PTSD pathophysiology and PTSD-related symptoms. The literature is presented as a narrative review, providing an overview on the most important and clinically relevant publications. We conclude that adjuvant melatonergic treatment could provide a potentially promising treatment strategy in the management of PTSD and especially PTSD-related syndromes and comorbidities. Rigorous preclinical and clinical studies are needed to validate this hypothesis.
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Affiliation(s)
- Agorastos Agorastos
- Department of Psychiatry and Psychotherapy, Center for Psychosocial Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Astrid C E Linthorst
- Faculty of Health Sciences, Neurobiology of Stress and Behaviour Research Group, School of Clinical Sciences, University of Bristol, Bristol, UK
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165
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Circadian regulation of human cortical excitability. Nat Commun 2016; 7:11828. [PMID: 27339884 PMCID: PMC4931032 DOI: 10.1038/ncomms11828] [Citation(s) in RCA: 118] [Impact Index Per Article: 14.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2015] [Accepted: 05/04/2016] [Indexed: 02/07/2023] Open
Abstract
Prolonged wakefulness alters cortical excitability, which is essential for proper brain function and cognition. However, besides prior wakefulness, brain function and cognition are also affected by circadian rhythmicity. Whether the regulation of cognition involves a circadian impact on cortical excitability is unknown. Here, we assessed cortical excitability from scalp electroencephalography (EEG) responses to transcranial magnetic stimulation in 22 participants during 29 h of wakefulness under constant conditions. Data reveal robust circadian dynamics of cortical excitability that are strongest in those individuals with highest endocrine markers of circadian amplitude. In addition, the time course of cortical excitability correlates with changes in EEG synchronization and cognitive performance. These results demonstrate that the crucial factor for cortical excitability, and basic brain function in general, is the balance between circadian rhythmicity and sleep need, rather than sleep homoeostasis alone. These findings have implications for clinical applications such as non-invasive brain stimulation in neurorehabilitation. Cognitive performance is impaired after prolonged wakefulness, yet the contribution of circadian rhythms for proper brain function remains unclear. Here the authors show that cortical excitability measured using TMS exhibits robust circadian dynamics which is correlated with cognitive performance.
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166
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Copin N, Gusto G, Vol S, Rollier S, Lantieri O, Lasfargues G, Tichet J. Perturbation du métabolisme lipidique chez des travailleurs postés consultants de centres d’examens de santé. Presse Med 2016; 45:e145-56. [DOI: 10.1016/j.lpm.2015.12.014] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/13/2014] [Revised: 10/19/2015] [Accepted: 12/17/2015] [Indexed: 12/29/2022] Open
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167
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Mader EC, Mader ACL. Sleep as spatiotemporal integration of biological processes that evolved to periodically reinforce neurodynamic and metabolic homeostasis: The 2m3d paradigm of sleep. J Neurol Sci 2016; 367:63-80. [PMID: 27423566 DOI: 10.1016/j.jns.2016.05.025] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2016] [Revised: 05/12/2016] [Accepted: 05/13/2016] [Indexed: 11/19/2022]
Abstract
Sleep continues to perplex scientists and researchers. Despite decades of sleep research, we still lack a clear understanding of the biological functions and evolution of sleep. In this review, we will examine sleep from a functional and phylogenetic perspective and describe some important conceptual gaps in understanding sleep. Classical theories of the biology and evolution of sleep emphasize sensory activation, energy balance, and metabolic homeostasis. Advances in electrophysiology, functional neuroimaging, and neuroplasticity allow us to view sleep within the framework of neural dynamics. With this paradigm shift, we have come to realize the importance of neurodynamic homeostasis in shaping the biology of sleep. Evidently, animals sleep to achieve neurodynamic and metabolic homeostasis. We are not aware of any framework for understanding sleep where neurodynamic, metabolic, homeostatic, chronophasic, and afferent variables are all taken into account. This motivated us to propose the two-mode three-drive (2m3d) paradigm of sleep. In the 2m3d paradigm, local neurodynamic/metabolic (N/M) processes switch between two modes-m0 and m1-in response to three drives-afferent, chronophasic, and homeostatic. The spatiotemporal integration of local m0/m1 operations gives rise to the global states of sleep and wakefulness. As a framework of evolution, the 2m3d paradigm allows us to view sleep as a robust adaptive strategy that evolved so animals can periodically reinforce neurodynamic and metabolic homeostasis while remaining sensitive to their internal and external environment.
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Affiliation(s)
- Edward Claro Mader
- Louisiana State University Health Sciences Center, Department of Neurology, New Orleans, LA 70112, USA.
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168
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Qian J, Scheer FAJL. Circadian System and Glucose Metabolism: Implications for Physiology and Disease. Trends Endocrinol Metab 2016; 27:282-293. [PMID: 27079518 PMCID: PMC4842150 DOI: 10.1016/j.tem.2016.03.005] [Citation(s) in RCA: 211] [Impact Index Per Article: 26.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/19/2016] [Revised: 03/07/2016] [Accepted: 03/07/2016] [Indexed: 12/24/2022]
Abstract
The circadian system serves one of the most fundamental properties present in nearly all organisms: it generates 24-h rhythms in behavioral and physiological processes and enables anticipating and adapting to daily environmental changes. Recent studies indicate that the circadian system is important in regulating the daily rhythm in glucose metabolism. Disturbance of this circadian control or of its coordination relative to the environmental/behavioral cycle, such as in shift work, eating late, or due to genetic changes, results in disturbed glucose control and increased type 2 diabetes risk. Therefore, an in-depth understanding of the mechanisms underlying glucose regulation by the circadian system and its disturbance may help in the development of therapeutic interventions against the deleterious health consequences of circadian disruption.
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Affiliation(s)
- Jingyi Qian
- Medical Chronobiology Program, Division of Sleep and Circadian Disorders, Brigham and Women's Hospital, Boston, MA 02115, USA; Division of Sleep Medicine, Harvard Medical School, Boston, MA 02115, USA.
| | - Frank A J L Scheer
- Medical Chronobiology Program, Division of Sleep and Circadian Disorders, Brigham and Women's Hospital, Boston, MA 02115, USA; Division of Sleep Medicine, Harvard Medical School, Boston, MA 02115, USA.
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169
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Silva CM, Mota MC, Miranda MT, Paim SL, Waterhouse J, Crispim CA. Chronotype, social jetlag and sleep debt are associated with dietary intake among Brazilian undergraduate students. Chronobiol Int 2016; 33:740-8. [DOI: 10.3109/07420528.2016.1167712] [Citation(s) in RCA: 67] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Affiliation(s)
- Catarina Mendes Silva
- Universidade Federal de Uberlândia, Faculdade de Medicina, Uberlândia, Minas Gerais, Brasil
| | - Maria Carliana Mota
- Universidade Federal de Uberlândia, Faculdade de Medicina, Uberlândia, Minas Gerais, Brasil
| | | | - Samantha Lemos Paim
- Universidade Federal de Uberlândia, Faculdade de Medicina, Uberlândia, Minas Gerais, Brasil
| | - Jim Waterhouse
- School of Human Sciences, Liverpool John Moores University, Liverpool, United Kingdom
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170
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Morris CJ, Purvis TE, Mistretta J, Scheer FAJL. Effects of the Internal Circadian System and Circadian Misalignment on Glucose Tolerance in Chronic Shift Workers. J Clin Endocrinol Metab 2016; 101:1066-74. [PMID: 26771705 PMCID: PMC4803172 DOI: 10.1210/jc.2015-3924] [Citation(s) in RCA: 137] [Impact Index Per Article: 17.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
CONTEXT Shift work is a risk factor for diabetes. The separate effects of the endogenous circadian system and circadian misalignment (ie, misalignment between the central circadian pacemaker and 24-hour environmental/behavioral rhythms such as the light/dark and feeding/fasting cycles) on glucose tolerance in shift workers are unknown. OBJECTIVE The objective of the study was to test the hypothesis that the endogenous circadian system and circadian misalignment separately affect glucose tolerance in shift workers, both independently from behavioral cycle effects. DESIGN A randomized, crossover study with two 3-day laboratory visits. SETTING Center for Clinical Investigation at Brigham and Women's Hospital. PATIENTS Healthy chronic shift workers. INTERVENTION The intervention included simulated night work comprised of 12-hour inverted behavioral and environmental cycles (circadian misalignment) or simulated day work (circadian alignment). MAIN OUTCOME MEASURES Postprandial glucose and insulin responses to identical meals given at 8:00 am and 8:00 pm in both protocols. RESULTS Postprandial glucose was 6.5% higher at 8:00 pm than 8:00 am (circadian phase effect), independent of behavioral effects (P = .0041). Circadian misalignment increased postprandial glucose by 5.6%, independent of behavioral and circadian effects (P = .0042). These variations in glucose tolerance appeared to be explained, at least in part, by different insulin mechanisms: during the biological evening by decreased pancreatic β-cell function (18% lower early and late phase insulin; both P ≤ .011) and during circadian misalignment presumably by decreased insulin sensitivity (elevated postprandial glucose despite 10% higher late phase insulin; P = .015) without change in early-phase insulin (P = .38). CONCLUSIONS Internal circadian time affects glucose tolerance in shift workers. Separately, circadian misalignment reduces glucose tolerance in shift workers, providing a mechanism to help explain the increased diabetes risk in shift workers.
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Affiliation(s)
- Christopher J Morris
- Medical Chronobiology Program (C.J.M., T.E.P., J.M., F.A.J.L.S.), Division of Sleep and Circadian Disorders, Departments of Medicine and Neurology, Brigham and Women's Hospital, Boston, Massachusetts 02115; and Division of Sleep Medicine (C.J.M., F.A.J.L.S.), Department of Medicine, Harvard Medical School, Boston, Massachusetts 02115
| | - Taylor E Purvis
- Medical Chronobiology Program (C.J.M., T.E.P., J.M., F.A.J.L.S.), Division of Sleep and Circadian Disorders, Departments of Medicine and Neurology, Brigham and Women's Hospital, Boston, Massachusetts 02115; and Division of Sleep Medicine (C.J.M., F.A.J.L.S.), Department of Medicine, Harvard Medical School, Boston, Massachusetts 02115
| | - Joseph Mistretta
- Medical Chronobiology Program (C.J.M., T.E.P., J.M., F.A.J.L.S.), Division of Sleep and Circadian Disorders, Departments of Medicine and Neurology, Brigham and Women's Hospital, Boston, Massachusetts 02115; and Division of Sleep Medicine (C.J.M., F.A.J.L.S.), Department of Medicine, Harvard Medical School, Boston, Massachusetts 02115
| | - Frank A J L Scheer
- Medical Chronobiology Program (C.J.M., T.E.P., J.M., F.A.J.L.S.), Division of Sleep and Circadian Disorders, Departments of Medicine and Neurology, Brigham and Women's Hospital, Boston, Massachusetts 02115; and Division of Sleep Medicine (C.J.M., F.A.J.L.S.), Department of Medicine, Harvard Medical School, Boston, Massachusetts 02115
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171
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Circadian misalignment increases cardiovascular disease risk factors in humans. Proc Natl Acad Sci U S A 2016; 113:E1402-11. [PMID: 26858430 DOI: 10.1073/pnas.1516953113] [Citation(s) in RCA: 397] [Impact Index Per Article: 49.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
Shift work is a risk factor for hypertension, inflammation, and cardiovascular disease. This increased risk cannot be fully explained by classic risk factors. One of the key features of shift workers is that their behavioral and environmental cycles are typically misaligned relative to their endogenous circadian system. However, there is little information on the impact of acute circadian misalignment on cardiovascular disease risk in humans. Here we show-by using two 8-d laboratory protocols-that short-term circadian misalignment (12-h inverted behavioral and environmental cycles for three days) adversely affects cardiovascular risk factors in healthy adults. Circadian misalignment increased 24-h systolic blood pressure (SBP) and diastolic blood pressure (DBP) by 3.0 mmHg and 1.5 mmHg, respectively. These results were primarily explained by an increase in blood pressure during sleep opportunities (SBP, +5.6 mmHg; DBP, +1.9 mmHg) and, to a lesser extent, by raised blood pressure during wake periods (SBP, +1.6 mmHg; DBP, +1.4 mmHg). Circadian misalignment decreased wake cardiac vagal modulation by 8-15%, as determined by heart rate variability analysis, and decreased 24-h urinary epinephrine excretion rate by 7%, without a significant effect on 24-h urinary norepinephrine excretion rate. Circadian misalignment increased 24-h serum interleukin-6, C-reactive protein, resistin, and tumor necrosis factor-α levels by 3-29%. We demonstrate that circadian misalignment per se increases blood pressure and inflammatory markers. Our findings may help explain why shift work increases hypertension, inflammation, and cardiovascular disease risk.
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172
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Zarrinpar A, Chaix A, Panda S. Daily Eating Patterns and Their Impact on Health and Disease. Trends Endocrinol Metab 2016; 27:69-83. [PMID: 26706567 PMCID: PMC5081399 DOI: 10.1016/j.tem.2015.11.007] [Citation(s) in RCA: 165] [Impact Index Per Article: 20.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/07/2015] [Revised: 11/10/2015] [Accepted: 11/13/2015] [Indexed: 12/26/2022]
Abstract
Cyclical expression of cell-autonomous circadian clock components and key metabolic regulators coordinate often discordant and distant cellular processes for efficient metabolism. Perturbation of these cycles, either by genetic manipulation, disruption of light/dark cycles, or, most relevant to the human population, via eating patterns, contributes to obesity and dysmetabolism. Time-restricted feeding (TRF), during which time of access to food is restricted to a few hours, without caloric restriction, supports robust metabolic cycles and protects against nutritional challenges that predispose to obesity and dysmetabolism. The mechanism by which TRF imparts its benefits is not fully understood but likely involves entrainment of metabolically active organs through gut signaling. Understanding the relationship of feeding pattern and metabolism could yield novel therapies for the obesity pandemic.
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Affiliation(s)
- Amir Zarrinpar
- Regulatory Biology Laboratory, The Salk Institute for Biological Studies, La Jolla, CA 92037, USA; Division of Gastroenterology, University of California, San Diego, La Jolla, CA 92093, USA.
| | - Amandine Chaix
- Regulatory Biology Laboratory, The Salk Institute for Biological Studies, La Jolla, CA 92037, USA
| | - Satchidananda Panda
- Regulatory Biology Laboratory, The Salk Institute for Biological Studies, La Jolla, CA 92037, USA.
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173
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Arnal PJ, Drogou C, Sauvet F, Regnauld J, Dispersyn G, Faraut B, Millet GY, Leger D, Gomez-Merino D, Chennaoui M. Effect of Sleep Extension on the Subsequent Testosterone, Cortisol and Prolactin Responses to Total Sleep Deprivation and Recovery. J Neuroendocrinol 2016; 28:12346. [PMID: 26647769 DOI: 10.1111/jne.12346] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/24/2015] [Revised: 11/10/2015] [Accepted: 11/29/2015] [Indexed: 01/24/2023]
Abstract
Total sleep deprivation (TSD) in humans is associated with altered hormonal levels, which may have clinical relevance. Less is known about the effect of an extended sleep period before TSD on these hormonal changes. Fourteen subjects participated in two experimental counterbalanced conditions (randomised cross-over design): extended sleep (21.00-07.00 h time in bed, EXT) and habitual sleep (22.30-07.00 h time in bed, HAB). For each condition, subjects performed two consecutive phases: six nights of either EXT or HAB. These nights were followed by 3 days in the sleep laboratory with blood sampling at 07.00 and 17.00 h at baseline (B-07.00 and B-17.00), after 24 and 34 h of continuous awakening (24 h-CA, 34 h-CA) and after one night of recovery sleep (R-07.00 and R-17.00) to assess testosterone, cortisol, prolactin and catecholamines concentrations. At 24 h of awakening, testosterone, cortisol and prolactin concentrations were significantly lower compared to B-07.00 and recovered basal levels after recovery sleep at R-07.00 (P < 0.001 for all). However, no change was observed at 34 h of awakening compared to B-17.00. No effect of sleep extension was observed on testosterone, cortisol and catecholamines concentrations at 24 and 34 h of awakening. However, prolactin concentration was significantly lower in EXT at B-07.00 and R-07.00 compared to HAB (P < 0.05, P < 0.001, respectively). In conclusion, 24 h of awakening inhibited gonadal and adrenal responses in healthy young subjects and this was not observed at 34 h of awakening. Six nights of sleep extension is not sufficient to limit decreased concentrations of testosterone and cortisol at 24 h of awakening but may have an impact on prolactin concentration.
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Affiliation(s)
- P J Arnal
- Unité Fatigue et Vigilance, Département Neurosciences et Contraintes Opérationnelles, Institut de Recherche Biomédicale des Armées (IRBA), Brétigny sur Orge, France
- Hôtel Dieu, EA7330 VIFASOM (Vigilance Fatigue et Sommeil), Université Paris Descartes, Paris, France
- Laboratoire de Physiologie de l'Exercice, Université de Lyon, Saint Etienne, France
| | - C Drogou
- Unité Fatigue et Vigilance, Département Neurosciences et Contraintes Opérationnelles, Institut de Recherche Biomédicale des Armées (IRBA), Brétigny sur Orge, France
- Hôtel Dieu, EA7330 VIFASOM (Vigilance Fatigue et Sommeil), Université Paris Descartes, Paris, France
| | - F Sauvet
- Unité Fatigue et Vigilance, Département Neurosciences et Contraintes Opérationnelles, Institut de Recherche Biomédicale des Armées (IRBA), Brétigny sur Orge, France
- Hôtel Dieu, EA7330 VIFASOM (Vigilance Fatigue et Sommeil), Université Paris Descartes, Paris, France
| | - J Regnauld
- Ecole du Val de Grâce, Faculté de médecine Pierre et Marie Curie (UPMC), Sorbonne Université, Paris, France
| | - G Dispersyn
- Unité Fatigue et Vigilance, Département Neurosciences et Contraintes Opérationnelles, Institut de Recherche Biomédicale des Armées (IRBA), Brétigny sur Orge, France
- Hôtel Dieu, EA7330 VIFASOM (Vigilance Fatigue et Sommeil), Université Paris Descartes, Paris, France
| | - B Faraut
- Hôtel Dieu, EA7330 VIFASOM (Vigilance Fatigue et Sommeil), Université Paris Descartes, Paris, France
- Sorbonne Paris Cité, APHP, Hôtel Dieu, Centre du Sommeil et de la Vigilance, Université Paris Descartes, Paris, France
| | - G Y Millet
- Laboratoire de Physiologie de l'Exercice, Université de Lyon, Saint Etienne, France
- Human Performance Laboratory, Faculty of Kinesiology, University of Calgary, Calgary, Canada
| | - D Leger
- Hôtel Dieu, EA7330 VIFASOM (Vigilance Fatigue et Sommeil), Université Paris Descartes, Paris, France
- Sorbonne Paris Cité, APHP, Hôtel Dieu, Centre du Sommeil et de la Vigilance, Université Paris Descartes, Paris, France
| | - D Gomez-Merino
- Unité Fatigue et Vigilance, Département Neurosciences et Contraintes Opérationnelles, Institut de Recherche Biomédicale des Armées (IRBA), Brétigny sur Orge, France
- Hôtel Dieu, EA7330 VIFASOM (Vigilance Fatigue et Sommeil), Université Paris Descartes, Paris, France
| | - M Chennaoui
- Unité Fatigue et Vigilance, Département Neurosciences et Contraintes Opérationnelles, Institut de Recherche Biomédicale des Armées (IRBA), Brétigny sur Orge, France
- Hôtel Dieu, EA7330 VIFASOM (Vigilance Fatigue et Sommeil), Université Paris Descartes, Paris, France
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174
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Ramachandran N, Smyth N, Thorn L, Eardley A, Evans P, Clow A. Relationship between post-awakening salivary cortisol and melatonin secretion in healthy participants. Stress 2016; 19:260-3. [PMID: 26809638 DOI: 10.3109/10253890.2016.1146671] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
We report the relationship between patterns of post-awakening salivary melatonin and cortisol secretion in healthy participants (n = 51; mean age 21.6 ± 5.0 years). Saliva samples were collected within the domestic setting, at 0-, 15-, 30-, and 45-min post-awakening on 2 consecutive typical weekdays. Analyses were undertaken on data with electronically verified sample timing accuracy (<5-min delay between awakening and the start of saliva sampling). Melatonin secretion declined linearly by an average of 29% within the first 45-min post-awakening. In contrast, there was a marked 112% surge in cortisol, characteristic of the cortisol awakening response. No day differences in melatonin or cortisol secretion were observed but melatonin concentrations were lower with later awakening. Despite contrasting post-awakening changes in these hormones, there was a lack of relationship between overall levels or patterns of melatonin and cortisol during this period.
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Affiliation(s)
- Natasha Ramachandran
- a Psychophysiology and Stress Research Group, Department of Psychology, University of Westminster , London , UK
| | - Nina Smyth
- a Psychophysiology and Stress Research Group, Department of Psychology, University of Westminster , London , UK
| | - Lisa Thorn
- a Psychophysiology and Stress Research Group, Department of Psychology, University of Westminster , London , UK
| | - Alison Eardley
- a Psychophysiology and Stress Research Group, Department of Psychology, University of Westminster , London , UK
| | - Phil Evans
- a Psychophysiology and Stress Research Group, Department of Psychology, University of Westminster , London , UK
| | - Angela Clow
- a Psychophysiology and Stress Research Group, Department of Psychology, University of Westminster , London , UK
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175
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Alley JR, Mazzochi JW, Smith CJ, Morris DM, Collier SR. Effects of resistance exercise timing on sleep architecture and nocturnal blood pressure. J Strength Cond Res 2015; 29:1378-85. [PMID: 25426516 DOI: 10.1519/jsc.0000000000000750] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Short sleep duration and poor quality of sleep have been associated with health risks including cardiovascular disease, diabetes, and obesity. Prior research has suggested that regular aerobic exercise improves the quality of sleep; however, less is known regarding resistance exercise (RE) and how RE may affect sleep architecture. The purpose of this study was to investigate the acute effects of timing of RE on sleep architecture and nocturnal blood pressure. College-aged subjects engaged in 5 laboratory visits. Visits 1 (C) and 2 provided a non-RE control day and established the 10-repetition maximum on each of 9 RE machines, respectively. During visits 3-5, the subjects reported at 0700 hours (7A), 1300 hours (1P), and 1900 hours (7P) in a randomized order to perform 30 minutes of RE. Ambulatory blood pressure and sleep-monitoring devices were worn during sleep after C, 7A, 1P, and 7P. Time to fall asleep was significantly different between RE conditions 7A and 1P and between 7A and 7P. All exercise conditions exhibited significantly fewer times woken than the non-RE control day, with 7P resulting in significantly less time awake after initially falling asleep as compared with C. Although timing of RE does not seem to statistically impact sleep stages or nocturnal blood pressure, these data indicate that engaging in RE at any time of the day may improve quality of sleep as compared with no RE. Resistance exercise may offer additional benefits regarding the ability to fall asleep and stay asleep to populations with osteoporosis, sarcopenia, anxiety, or depression.
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Affiliation(s)
- Jessica R Alley
- Vascular Biology and Autonomic Studies Laboratory, Department of Health and Exercise Science, Appalachian State University, Boone, North Carolina
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176
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Morris CJ, Garcia JI, Myers S, Yang JN, Trienekens N, Scheer FA. The Human Circadian System Has a Dominating Role in Causing the Morning/Evening Difference in Diet-Induced Thermogenesis. Obesity (Silver Spring) 2015; 23:2053-8. [PMID: 26414564 PMCID: PMC4602397 DOI: 10.1002/oby.21189] [Citation(s) in RCA: 116] [Impact Index Per Article: 12.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/08/2014] [Revised: 05/06/2015] [Accepted: 05/25/2015] [Indexed: 12/26/2022]
Abstract
OBJECTIVE Diet-induced thermogenesis (DIT) is lower in the evening and at night than in the morning. This may help explain why meal timing affects body weight regulation and why shift work is a risk factor for obesity. The separate effects of the endogenous circadian system--independent of behavioral cycles--and of circadian misalignment on DIT are unknown. METHODS Thirteen healthy adults undertook a randomized crossover study with two 8-day laboratory visits: three baseline days followed either by repeated simulated night shifts including 12-h inverted behavioral cycles (circadian misalignment) or by recurring simulated day shifts (circadian alignment). DIT was determined for up to 114 min (hereafter referred to as "early DIT") following identical meals given at 8AM and 8PM in both protocols. RESULTS During baseline days, early DIT was 44% lower in the evening than morning. This was primarily explained by a circadian influence rather than any behavioral cycle effect; early DIT was 50% lower in the biological evening than biological morning, independent of behavioral cycle influences. Circadian misalignment had no overall effect on early DIT. CONCLUSIONS The circadian system plays a dominating role in the morning/evening difference in early DIT and may contribute to the effects of meal timing on body weight regulation.
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Affiliation(s)
- Christopher J. Morris
- Medical Chronobiology Program, Division of Sleep and Circadian Disorders, Brigham and Women’s Hospital, Boston, MA
- Division of Sleep Medicine, Harvard Medical School, Boston, MA
| | - Joanna I. Garcia
- Medical Chronobiology Program, Division of Sleep and Circadian Disorders, Brigham and Women’s Hospital, Boston, MA
| | - Samantha Myers
- Medical Chronobiology Program, Division of Sleep and Circadian Disorders, Brigham and Women’s Hospital, Boston, MA
| | - Jessica N. Yang
- Medical Chronobiology Program, Division of Sleep and Circadian Disorders, Brigham and Women’s Hospital, Boston, MA
| | - Noortje Trienekens
- Medical Chronobiology Program, Division of Sleep and Circadian Disorders, Brigham and Women’s Hospital, Boston, MA
| | - Frank A.J.L. Scheer
- Medical Chronobiology Program, Division of Sleep and Circadian Disorders, Brigham and Women’s Hospital, Boston, MA
- Division of Sleep Medicine, Harvard Medical School, Boston, MA
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177
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Wennman H, Kronholm E, Partonen T, Peltonen M, Vasankari T, Borodulin K. Evening typology and morning tiredness associates with low leisure time physical activity and high sitting. Chronobiol Int 2015; 32:1090-100. [PMID: 26317556 DOI: 10.3109/07420528.2015.1063061] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Circadian typology is a latent trait that is usually assessed with scoring on a series of questions thought to represent the construct. But, in the classification, most people fall into the intermediate type, i.e. neither a definite morning nor an evening type, but still showing stronger preference towards either end of the continuum. Our aim was to operationalize chronotype using latent class analysis (LCA) for a 6-item scale derived from the original Horne-Östberg Morningness-Eveningness Questionnaire to compare and understand characteristics of chronotype in a population-based sample of adults in Finland. A total of 4904 men and women aged 25-74 years were included. We also analyzed the associations of chronotypes with physical activity (PA) and sitting. We found five latent chronotype groups including "rested more-evening type" (28%), "rested more-morning type" (24%), "morning type" (23%), "tired more-evening type" (17%) and "evening type" (8%) groups. Operationalization of chronotype by LCA suggests that morning alertness is an important feature differentiating chronotypes. Further, the "evening type" and the "tired, more-evening type" had higher odds for none to very low as well as low PA, as compared to "morning type". In addition, "evening type" was associated with higher odds for more time spent sitting, as compared to "morning type". Our findings indicate that it is important to assess sleep schedules and morning tiredness, which then could be targeted as a potential mediating factor for health behaviors, in particular, PA and health status.
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Affiliation(s)
- Heini Wennman
- a National Institute for Health and Welfare , Helsinki , Finland and
| | - Erkki Kronholm
- a National Institute for Health and Welfare , Helsinki , Finland and
| | - Timo Partonen
- a National Institute for Health and Welfare , Helsinki , Finland and
| | - Markku Peltonen
- a National Institute for Health and Welfare , Helsinki , Finland and
| | - Tommi Vasankari
- a National Institute for Health and Welfare , Helsinki , Finland and.,b UKK-Institute for Health Promotion and Research , Tampere , Finland
| | - Katja Borodulin
- a National Institute for Health and Welfare , Helsinki , Finland and
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178
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Kim M, Sasai H, Kojima N, Kim H. Objectively measured night-to-night sleep variations are associated with body composition in very elderly women. J Sleep Res 2015; 24:639-47. [DOI: 10.1111/jsr.12326] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2015] [Revised: 05/20/2015] [Accepted: 06/22/2015] [Indexed: 12/25/2022]
Affiliation(s)
- Miji Kim
- Research Team for Promoting Independence of the Elderly; Tokyo Metropolitan Institute of Gerontology; Tokyo Japan
| | - Hiroyuki Sasai
- Faculty of Medicine; University of Tsukuba; Tsukuba Japan
- Japan Society for the Promotion of Science; Tokyo Japan
| | - Narumi Kojima
- Research Team for Promoting Independence of the Elderly; Tokyo Metropolitan Institute of Gerontology; Tokyo Japan
| | - Hunkyung Kim
- Research Team for Promoting Independence of the Elderly; Tokyo Metropolitan Institute of Gerontology; Tokyo Japan
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179
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Antelmi E, Stamelou M, Liguori R, Bhatia KP. Nonmotor Symptoms in Dopa-Responsive Dystonia. Mov Disord Clin Pract 2015; 2:347-356. [PMID: 30363518 DOI: 10.1002/mdc3.12211] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2015] [Revised: 05/15/2015] [Accepted: 05/15/2015] [Indexed: 02/02/2023] Open
Abstract
Background Dopa-responsive dystonia (DRD) is a rare inherited dystonia, caused by an autosomal dominantly inherited defect in the gene GCH1 that encodes guanosine triphosphate cyclohydrolase 1. It catalyzes the first and rate-limiting enzyme in the biosynthesis of tetrahydrobiopterin, which is the essential co-factor for aromatic amino acid hydroxylases. Mutation results in the typical scenario of a young-onset lower-limb dystonia with diurnal fluctuations, concurrent or subsequent development of parkinsonism and excellent response to levodopa. Given the myriad functions of tetrahydrobiopterin, it is reasonable that other systems, apart from motor, would also be impaired. So far, non-motor symptoms have been overlooked and very few and often contrasting data are currently available on the matter. Methods Here by searching the Medline database for publications between 1971 to March 2015, we render an in-depth analysis of all published data on non-motor symptoms in DRD. Results Depression and subtle sleep quality impairment have been reported among the different cohorts, while current data do not support any alterations of the cardiologic and autonomic systems. However, there is debate about the occurrence of sleep-related movement disorders and cognitive function. Non-motor symptoms are instead frequently reported among the clinical spectrum of other neurotransmitter disorders which may sometimes mimic DRD phenotype, ie, DRD plus diseases. Conclusions Further studies in larger and treatment-naïve cohorts are needed to better elucidate the extend of non-motor symptoms in DRD and also to consider treatment for these.
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Affiliation(s)
- Elena Antelmi
- Department of Biomedical and Neuromotor Sciences Alma Mater Studiorum University of Bologna Bologna Italy.,Sobell Department of Motor Neuroscience and Movement Disorders University College London (UCL) Institute of Neurology London United Kingdom
| | - Maria Stamelou
- Second Department of Neurology University of Athens Athens Greece.,Neurology Clinic Philipps University Marburg Germany
| | - Rocco Liguori
- Department of Biomedical and Neuromotor Sciences Alma Mater Studiorum University of Bologna Bologna Italy.,IRCCS Institute of Neurological Sciences Bologna Italy
| | - Kailash P Bhatia
- Sobell Department of Motor Neuroscience and Movement Disorders University College London (UCL) Institute of Neurology London United Kingdom
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180
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The Link Between Physical Activity and Cognitive Dysfunction in Alzheimer Disease. Phys Ther 2015; 95:1046-60. [PMID: 25573757 DOI: 10.2522/ptj.20140212] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/06/2014] [Accepted: 01/02/2015] [Indexed: 02/09/2023]
Abstract
Alzheimer disease (AD) is a primary cause of cognitive dysfunction in the elderly population worldwide. Despite the allocation of enormous amounts of funding and resources to studying this brain disorder, there are no effective pharmacological treatments for reducing the severity of pathology and restoring cognitive function in affected people. Recent reports on the failure of multiple clinical trials for AD have highlighted the need to diversify further the search for new therapeutic strategies for cognitive dysfunction. Thus, studies detailing the neuroprotective effects of physical activity (PA) on the brain in AD were reviewed, and mechanisms by which PA might mitigate AD-related cognitive decline were explored. A MEDLINE database search was used to generate a list of studies conducted between January 2007 and September 2014 (n=394). These studies, along with key references, were screened to identify those that assessed the effects of PA on AD-related biomarkers and cognitive function. The search was not limited on the basis of intensity, frequency, duration, or mode of activity. However, studies in which PA was combined with another intervention (eg, diet, pharmacotherapeutics, ovariectomy, cognitive training, behavioral therapy), and studies not written in English were excluded. Thirty-eight animal and human studies met entry criteria. Most of the studies suggested that PA attenuates neuropathology and positively affects cognitive function in AD. Although the literature lacked sufficient evidence to support precise PA guidelines, convergent evidence does suggest that the incorporation of regular PA into daily routines mitigates AD-related symptoms, especially when deployed earlier in the disease process. Here the protocols used to alter the progression of AD-related neuropathology and cognitive decline are highlighted, and the implications for physical therapist practice are discussed.
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181
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Björnsdottir S, Øksnes M, Isaksson M, Methlie P, Nilsen RM, Hustad S, Kämpe O, Hulting AL, Husebye ES, Løvås K, Nyström T, Bensing S. Circadian hormone profiles and insulin sensitivity in patients with Addison's disease: a comparison of continuous subcutaneous hydrocortisone infusion with conventional glucocorticoid replacement therapy. Clin Endocrinol (Oxf) 2015; 83:28-35. [PMID: 25400085 DOI: 10.1111/cen.12670] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/29/2014] [Revised: 10/21/2014] [Accepted: 11/12/2014] [Indexed: 11/30/2022]
Abstract
CONTEXT Conventional glucocorticoid replacement therapy in patients with Addison's disease (AD) is unphysiological with possible adverse effects on mortality, morbidity and quality of life. The diurnal cortisol profile can likely be restored by continuous subcutaneous hydrocortisone infusion (CSHI). OBJECTIVE The aim of this study was to compare circadian hormone rhythms and insulin sensitivity in conventional thrice-daily regimen of glucocorticoid replacement therapy with CSHI treatment in patients with AD. DESIGN AND SETTING An open, randomized, two-period, 12-week crossover multicentre trial in Norway and Sweden. PATIENTS Ten Norwegian patients were admitted for 24-h sampling of hormone profiles. Fifteen Swedish patients underwent euglycaemic-hyperinsulinaemic clamp. INTERVENTION Thrice-daily regimen of oral hydrocortisone (OHC) and CSHI treatment. MAIN OUTCOME MEASURE We measured the circadian rhythm of cortisol, adrenocorticotropic hormone (ACTH), growth hormone (GH), insulin-like growth factor-1, (IGF-1), IGF-binding protein-3 (IGFBP-3), glucose, insulin and triglycerides during OHC and CSHI treatment. Euglycaemic-hyperinsulinaemic clamp was used to assess insulin sensitivity. RESULTS Continuous subcutaneous hydrocortisone infusion provided a more physiological circadian cortisol curve including a late-night cortisol surge. ACTH levels showed a near normal circadian variation for CSHI. CSHI prevented a continuous decrease in glucose during the night. No difference in insulin sensitivity was observed between the two treatment arms. CONCLUSION Continuous subcutaneous hydrocortisone infusion replacement re-established a circadian cortisol rhythm and normalized the ACTH levels. Patients with CSHI replacement had a more stable night-time glucose level compared with OHC without compromising insulin sensitivity. Thus, restoring night-time cortisol levels might be advantageous for patients with AD.
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Affiliation(s)
- Sigridur Björnsdottir
- Department of Molecular Medicine and Surgery, Karolinska Institutet, Stockholm, Sweden
| | - Marianne Øksnes
- Department of Clinical Science, University of Bergen, Bergen, Norway
- Department of Medicine, Haukeland University Hospital, Bergen, Norway
| | - Magnus Isaksson
- Department of Medical Sciences, Uppsala University, Uppsala, Sweden
| | - Paal Methlie
- Department of Clinical Science, University of Bergen, Bergen, Norway
| | - Roy M Nilsen
- Centre for Clinical Research, Haukeland University Hospital, Bergen, Norway
| | - Steinar Hustad
- Department of Clinical Science, University of Bergen, Bergen, Norway
| | - Olle Kämpe
- Department of Medical Sciences, Uppsala University, Uppsala, Sweden
| | - Anna-Lena Hulting
- Department of Molecular Medicine and Surgery, Karolinska Institutet, Stockholm, Sweden
| | - Eystein S Husebye
- Department of Clinical Science, University of Bergen, Bergen, Norway
- Department of Medicine, Haukeland University Hospital, Bergen, Norway
| | - Kristian Løvås
- Department of Clinical Science, University of Bergen, Bergen, Norway
- Department of Medicine, Haukeland University Hospital, Bergen, Norway
| | - Thomas Nyström
- Division of Internal Medicine, Department of Clinical Science and Education, Södersjukhuset AB, Stockholm, Sweden
| | - Sophie Bensing
- Department of Molecular Medicine and Surgery, Karolinska Institutet, Stockholm, Sweden
- Department of Medical Sciences, Uppsala University, Uppsala, Sweden
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182
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Abstract
Coordinated daily rhythms are evident in most aspects of our physiology, driven by internal timing systems known as circadian clocks. Our understanding of how biological clocks are built and function has grown exponentially over the past 20 years. With this has come an appreciation that disruption of the clock contributes to the pathophysiology of numerous diseases, from metabolic disease to neurological disorders to cancer. However, it remains to be determined whether it is the disruption of our rhythmic physiology per se (loss of timing itself), or altered functioning of individual clock components that drive pathology. Here, we review the importance of circadian rhythms in terms of how we (and other organisms) relate to the external environment, but also in relation to how internal physiological processes are coordinated and synchronized. These issues are of increasing importance as many aspects of modern life put us in conflict with our internal clockwork.
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Affiliation(s)
- Alexander C West
- Faculty of Life Sciences, University of Manchester, Manchester, UK
| | - David A Bechtold
- Faculty of Life Sciences, University of Manchester, Manchester, UK
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183
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Ohlander J, Keskin MC, Stork J, Radon K. Shift work and hypertension: Prevalence and analysis of disease pathways in a German car manufacturing company. Am J Ind Med 2015; 58:549-60. [PMID: 25773725 DOI: 10.1002/ajim.22437] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/09/2015] [Indexed: 12/15/2022]
Abstract
BACKGROUND Hypertension and cardiovascular disease (CVD) may share a similar pathophysiology. Despite shift workers' CVD excess risk, studies on shift work and hypertension are inconclusive. METHODS Blood pressure and shift status for 25,343 autoworkers were obtained from medical check-ups and company registers. Cross-sectional associations modeling the total effect from shift work (day shifts, shift work without nights, rotating shift work with nights, and night shifts) on hypertension were assessed. By sequential adjustments, the influence of behavioral, psychosocial, and physiological factors on the total effect was examined, with subsequent mediation and moderation analyses. RESULTS Adjusted for confounders, shift work without nights (vs. day shifts) was significantly associated with hypertension (OR 1.15, 95%CI 1.02-1.30). The total effect was mediated by BMI, physical inactivity, and sleep disorders. No moderation of the total effect by behaviors was found. CONCLUSION The association between shift work and hypertension seems mainly attributable to behavioral mechanisms.
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Affiliation(s)
- Johan Ohlander
- Institute and Outpatient Clinic for Occupational; Social and Environmental Medicine; University Hospital Munich; Ziemssenstrasse 1 80336 Munich Germany
| | | | - Joachim Stork
- AUDI Gesundheitszentrum Süd; AUDI AG 85045 Ingolstadt Germany
| | - Katja Radon
- Institute and Outpatient Clinic for Occupational; Social and Environmental Medicine; University Hospital Munich; Ziemssenstrasse 1 80336 Munich Germany
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184
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Endogenous circadian system and circadian misalignment impact glucose tolerance via separate mechanisms in humans. Proc Natl Acad Sci U S A 2015; 112:E2225-34. [PMID: 25870289 DOI: 10.1073/pnas.1418955112] [Citation(s) in RCA: 298] [Impact Index Per Article: 33.1] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
Glucose tolerance is lower in the evening and at night than in the morning. However, the relative contribution of the circadian system vs. the behavioral cycle (including the sleep/wake and fasting/feeding cycles) is unclear. Furthermore, although shift work is a diabetes risk factor, the separate impact on glucose tolerance of the behavioral cycle, circadian phase, and circadian disruption (i.e., misalignment between the central circadian pacemaker and the behavioral cycle) has not been systematically studied. Here we show--by using two 8-d laboratory protocols--in healthy adults that the circadian system and circadian misalignment have distinct influences on glucose tolerance, both separate from the behavioral cycle. First, postprandial glucose was 17% higher (i.e., lower glucose tolerance) in the biological evening (8:00 PM) than morning (8:00 AM; i.e., a circadian phase effect), independent of the behavioral cycle effect. Second, circadian misalignment itself (12-h behavioral cycle inversion) increased postprandial glucose by 6%. Third, these variations in glucose tolerance appeared to be explained, at least in part, by different mechanisms: during the biological evening by decreased pancreatic β-cell function (27% lower early-phase insulin) and during circadian misalignment presumably by decreased insulin sensitivity (elevated postprandial glucose despite 14% higher late-phase insulin) without change in early-phase insulin. We explored possible contributing factors, including changes in polysomnographic sleep and 24-h hormonal profiles. We demonstrate that the circadian system importantly contributes to the reduced glucose tolerance observed in the evening compared with the morning. Separately, circadian misalignment reduces glucose tolerance, providing a mechanism to help explain the increased diabetes risk in shift workers.
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185
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Briançon-Marjollet A, Weiszenstein M, Henri M, Thomas A, Godin-Ribuot D, Polak J. The impact of sleep disorders on glucose metabolism: endocrine and molecular mechanisms. Diabetol Metab Syndr 2015. [PMID: 25834642 DOI: 10.1186/s13098- 015-0018-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
Abstract
Modern lifestyle has profoundly modified human sleep habits. Sleep duration has shortened over recent decades from 8 to 6.5 hours resulting in chronic sleep deprivation. Additionally, irregular sleep, shift work and travelling across time zones lead to disruption of circadian rhythms and asynchrony between the master hypothalamic clock and pacemakers in peripheral tissues. Furthermore, obstructive sleep apnea syndrome (OSA), which affects 4 - 15% of the population, is not only characterized by impaired sleep architecture but also by repetitive hemoglobin desaturations during sleep. Epidemiological studies have identified impaired sleep as an independent risk factor for all cause of-, as well as for cardiovascular, mortality/morbidity. More recently, sleep abnormalities were causally linked to impairments in glucose homeostasis, metabolic syndrome and Type 2 Diabetes Mellitus (T2DM). This review summarized current knowledge on the metabolic alterations associated with the most prevalent sleep disturbances, i.e. short sleep duration, shift work and OSA. We have focused on various endocrine and molecular mechanisms underlying the associations between inadequate sleep quality, quantity and timing with impaired glucose tolerance, insulin resistance and pancreatic β-cell dysfunction. Of these mechanisms, the role of the hypothalamic-pituitary-adrenal axis, circadian pacemakers in peripheral tissues, adipose tissue metabolism, sympathetic nervous system activation, oxidative stress and whole-body inflammation are discussed. Additionally, the impact of intermittent hypoxia and sleep fragmentation (key components of OSA) on intracellular signaling and metabolism in muscle, liver, fat and pancreas are also examined. In summary, this review provides endocrine and molecular explanations for the associations between common sleep disturbances and the pathogenesis of T2DM.
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Affiliation(s)
- Anne Briançon-Marjollet
- Université Grenoble Alpes, HP2, F-38041 Grenoble, Cedex France.,INSERM U1042, F-38041 Grenoble, Cedex France
| | - Martin Weiszenstein
- Centre for Research on Diabetes, Metabolism and Nutrition, Third Faculty of Medicine, Charles University, Prague, Czech Republic
| | - Marion Henri
- Université Grenoble Alpes, HP2, F-38041 Grenoble, Cedex France.,INSERM U1042, F-38041 Grenoble, Cedex France
| | - Amandine Thomas
- Université Grenoble Alpes, HP2, F-38041 Grenoble, Cedex France.,INSERM U1042, F-38041 Grenoble, Cedex France
| | - Diane Godin-Ribuot
- Université Grenoble Alpes, HP2, F-38041 Grenoble, Cedex France.,INSERM U1042, F-38041 Grenoble, Cedex France
| | - Jan Polak
- Centre for Research on Diabetes, Metabolism and Nutrition, Third Faculty of Medicine, Charles University, Prague, Czech Republic.,2nd Internal Medicine Department, University Hospital Kralovske Vinohrady, Prague, Czech Republic.,Sports Medicine Department, Third Faculty of Medicine, Charles University in Prague, Ruska 87, Praha 10, 100 00 Czech Republic
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186
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Kanikowska D, Sato M, Witowski J. Contribution of daily and seasonal biorhythms to obesity in humans. INTERNATIONAL JOURNAL OF BIOMETEOROLOGY 2015; 59:377-384. [PMID: 25034796 PMCID: PMC4427629 DOI: 10.1007/s00484-014-0871-z] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/18/2013] [Revised: 05/08/2014] [Accepted: 07/03/2014] [Indexed: 06/03/2023]
Abstract
While the significance of obesity as a serious health problem is well recognized, little is known about whether and how biometerological factors and biorhythms causally contribute to obesity. Obesity is often associated with altered seasonal and daily rhythmicity in food intake, metabolism and adipose tissue function. Environmental stimuli affect both seasonal and daily rhythms, and the latter are under additional control of internal molecular oscillators, or body clocks. Modifications of clock genes in animals and changes to normal daily rhythms in humans (as in shift work and sleep deprivation) result in metabolic dysregulation that favours weight gain. Here, we briefly review the potential links between biorhythms and obesity in humans.
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Affiliation(s)
- Dominika Kanikowska
- Department of Pathophysiology, Poznań University of Medical Sciences, Rokietnicka 8, 60-806, Poznań, Poland,
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187
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Tsukamoto-Yamauchi N, Terasaka T, Iwasaki Y, Otsuka F. Interaction of pituitary hormones and expression of clock genes modulated by bone morphogenetic protein-4 and melatonin. Biochem Biophys Res Commun 2015; 459:172-7. [PMID: 25727018 DOI: 10.1016/j.bbrc.2015.02.100] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2015] [Accepted: 02/18/2015] [Indexed: 11/29/2022]
Abstract
Functional interaction of clock genes and pituitary hormones was investigated by focusing on bone morphogenetic protein (BMP)-4 and melatonin actions in anterior pituitary cells. A significant correlation between the mRNA expression of proopiomelanocortin (POMC) and Per2 was revealed in serial cultures of corticotrope AtT20 cells. Knockdown of Per2 expression by siRNA in AtT20 cells resulted in a significant reduction of POMC mRNA level with or without corticotropin-releasing hormone (CRH) stimulation. Treatments with BMP-4 and melatonin, both of which suppress POMC expression, reduced Per2 mRNA as well as protein levels in AtT20 cells. On the other hand, in lactosomatotrope GH3 cells, an expressional correlation was found between prolactin (PRL) and Clock mRNA levels, which was attenuated in the presence of forskolin treatment. The siRNA-mediated knockdown of Clock expression, but not that of Bmal1, significantly reduced PRL mRNA levels in GH3 cells. Interestingly, Clock mRNA and protein levels did not fluctuate with melatonin, BMP-4 or forskolin treatment, although Bmal1 expression was significantly increased by forskolin treatment. Collectively, a significant correlation between the expression of POMC and Per2 and that between PRL and Clock were uncovered in corticotrope and lactosomatotrope cells, respectively. Per2 expression was inhibited by POMC modulators including melatonin and BMP-4, while Clock expression was steadily maintained. Thus, the effects of melatonin and BMP-4 on clock gene expression may imply differential stability of circadian rhythms of adrenocorticotropin (ACTH) and PRL secreted from the anterior pituitary.
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Affiliation(s)
- Naoko Tsukamoto-Yamauchi
- Department of Medicine and Clinical Science, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, 2-5-1 Shikata-cho, Kitaku, Okayama 700-8558, Japan
| | - Tomohiro Terasaka
- Department of Medicine and Clinical Science, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, 2-5-1 Shikata-cho, Kitaku, Okayama 700-8558, Japan
| | - Yasumasa Iwasaki
- Department of Endocrinology, Metabolism, and Nephrology, Kochi Medical School, Kochi University, Nankoku 783-8505, Japan
| | - Fumio Otsuka
- Department of General Medicine, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, 2-5-1 Shikata-cho, Kitaku, Okayama 700-8558, Japan.
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188
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Chandler-Laney PC, Schneider CR, Gower BA, Granger WM, Mancuso MS, Biggio JR. Association of late-night carbohydrate intake with glucose tolerance among pregnant African American women. MATERNAL AND CHILD NUTRITION 2015; 12:688-98. [PMID: 25786515 DOI: 10.1111/mcn.12181] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Obesity and late-night food consumption are associated with impaired glucose tolerance. Late-night carbohydrate consumption may be particularly detrimental during late pregnancy because insulin sensitivity declines as pregnancy progresses. Further, women who were obese (Ob) prior to pregnancy have lower insulin sensitivity than do women of normal weight (NW). The aim of this study is to test the hypothesis that night-time carbohydrate consumption is associated with poorer glucose tolerance in late pregnancy and that this association would be exacerbated among Ob women. Forty non-diabetic African American women were recruited based upon early pregnancy body mass index (NW, <25 kg m(-2) ; Ob, ≥30 kg m(-2) ). Third trimester free-living dietary intake was assessed by food diary, and indices of glucose tolerance and insulin action were assessed during a 75-g oral glucose tolerance test. Women in the Ob group reported greater average 24-h energy intake (3055 kcal vs. 2415 kcal, P < 0.05). Across the whole cohort, night-time, but not day-time, carbohydrate intake was positively associated with glucose concentrations after the glucose load and inversely associated with early phase insulin secretion (P < 0.05). Multiple linear regression modelling within each weight group showed that the associations among late-night carbohydrate intake, glucose concentrations and insulin secretion were present only in the Ob group. This is the first study to report an association of night-time carbohydrate intake specifically on glucose tolerance and insulin action during pregnancy. If replicated, these results suggest that late-night carbohydrate intake may be a potential target for intervention to improve metabolic health of Ob women in late pregnancy.
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Affiliation(s)
| | - Camille R Schneider
- Department of Nutrition Sciences, University of Alabama, Birmingham, Alabama, USA
| | - Barbara A Gower
- Department of Nutrition Sciences, University of Alabama, Birmingham, Alabama, USA
| | - Wesley M Granger
- Department of Clinical and Diagnostic Sciences, University of Alabama, Birmingham, Alabama, USA
| | - Melissa S Mancuso
- Department of Obstetrics and Gynecology, Center for Women's Reproductive Health, University of Alabama, Birmingham, Alabama, USA
| | - Joseph R Biggio
- Department of Obstetrics and Gynecology, Center for Women's Reproductive Health, University of Alabama, Birmingham, Alabama, USA
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189
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Wu J, Xu G, Shen L, Zhang Y, Song L, Yang S, Yang H, Liang Y, Wu T, Wang Y. Daily sleep duration and risk of metabolic syndrome among middle-aged and older Chinese adults: cross-sectional evidence from the Dongfeng-Tongji cohort study. BMC Public Health 2015; 15:178. [PMID: 25885456 PMCID: PMC4349607 DOI: 10.1186/s12889-015-1521-z] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2014] [Accepted: 02/11/2015] [Indexed: 11/19/2022] Open
Abstract
Background Evidence from epidemiological studies has demonstrated that a shorter or longer duration of nighttime sleep may increase the risk of metabolic syndrome. Little is known about the association between daily sleep duration, including nighttime sleep and daytime napping duration, and metabolic syndrome. We aimed to examine the association between daily sleep duration and metabolic syndrome and its components in middle-aged and older Chinese adults using data from the Dongfeng-Tongji Cohort study. Methods A total of 25,184 participants (mean age 63.6 years) who completed the baseline questionnaire, physical examination and laboratory tests were included in this analysis. Daily sleep duration was calculated by summing up nighttime sleep duration and daytime napping duration. The metabolic syndrome was defined using the International Diabetes Federation criteria. Logistic regression models were used to investigate the association between daily sleep duration and the risk of metabolic syndrome and its components. Results Of the participants, 8,046 (31.9%) had metabolic syndrome. Females had a higher prevalence (38.6%) of metabolic syndrome than males (23.9%). Female participants with longer daily sleep duration (≥8 hours, all P < 0.05) per day had a higher risk of metabolic syndrome compared with those sleeping 7–7.9 hours, adjusting for potential confounders. Longer daily sleep was positively associated with individual components of metabolic syndrome except central obesity in females, and was only positively associated with HDL-C in males. Further analysis revealed that a longer duration of daytime napping (≥90 minutes, P < 0.05) was associated with the risk of metabolic syndrome in females. However, nighttime sleep duration was not associated with the risk of metabolic syndrome in either males or females. Conclusions Our findings suggested that longer daytime napping duration rather than nighttime sleeping duration was associated with increased risk of metabolic syndrome in females. The findings have significant implications for further studies to explore the appropriate sleep duration for middle-aged and older adults.
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Affiliation(s)
- Jing Wu
- MOE Key Lab of Environment and Health, School of Public Health, Tongji Medical College, Huazhong University of Science & Technology, Hangkong Road 13, Wuhan, 430030, Hubei, China. .,Department of Maternal and Child Health, School of Public Health, Tongji Medical College, Huazhong University of Science & Technology, Hangkong Road 13, Wuhan, 430030, Hubei, China.
| | - Guiqiang Xu
- MOE Key Lab of Environment and Health, School of Public Health, Tongji Medical College, Huazhong University of Science & Technology, Hangkong Road 13, Wuhan, 430030, Hubei, China. .,Department of Maternal and Child Health, School of Public Health, Tongji Medical College, Huazhong University of Science & Technology, Hangkong Road 13, Wuhan, 430030, Hubei, China.
| | - Lijun Shen
- MOE Key Lab of Environment and Health, School of Public Health, Tongji Medical College, Huazhong University of Science & Technology, Hangkong Road 13, Wuhan, 430030, Hubei, China. .,Department of Maternal and Child Health, School of Public Health, Tongji Medical College, Huazhong University of Science & Technology, Hangkong Road 13, Wuhan, 430030, Hubei, China.
| | - Yanmei Zhang
- MOE Key Lab of Environment and Health, School of Public Health, Tongji Medical College, Huazhong University of Science & Technology, Hangkong Road 13, Wuhan, 430030, Hubei, China. .,Department of Maternal and Child Health, School of Public Health, Tongji Medical College, Huazhong University of Science & Technology, Hangkong Road 13, Wuhan, 430030, Hubei, China.
| | - Lulu Song
- MOE Key Lab of Environment and Health, School of Public Health, Tongji Medical College, Huazhong University of Science & Technology, Hangkong Road 13, Wuhan, 430030, Hubei, China. .,Department of Maternal and Child Health, School of Public Health, Tongji Medical College, Huazhong University of Science & Technology, Hangkong Road 13, Wuhan, 430030, Hubei, China.
| | - Siyi Yang
- MOE Key Lab of Environment and Health, School of Public Health, Tongji Medical College, Huazhong University of Science & Technology, Hangkong Road 13, Wuhan, 430030, Hubei, China. .,Department of Maternal and Child Health, School of Public Health, Tongji Medical College, Huazhong University of Science & Technology, Hangkong Road 13, Wuhan, 430030, Hubei, China.
| | - Handong Yang
- Dongfeng General Hospital, Dongfeng Motor Corporation and Hubei University of Medicine, Daling Road 16, Shiyan, 442000, Hubei, China.
| | - Yuan Liang
- Department of Social Medicine, School of Public Health, Tongji Medical College, Huazhong University of Science & Technology, Hangkong Road 13, Wuhan, 430030, Hubei, China.
| | - Tangchun Wu
- MOE Key Lab of Environment and Health, School of Public Health, Tongji Medical College, Huazhong University of Science & Technology, Hangkong Road 13, Wuhan, 430030, Hubei, China.
| | - Youjie Wang
- MOE Key Lab of Environment and Health, School of Public Health, Tongji Medical College, Huazhong University of Science & Technology, Hangkong Road 13, Wuhan, 430030, Hubei, China. .,Department of Maternal and Child Health, School of Public Health, Tongji Medical College, Huazhong University of Science & Technology, Hangkong Road 13, Wuhan, 430030, Hubei, China.
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Fu M, Zhang L, Ahmed A, Plaut K, Haas DM, Szucs K, Casey TM. Does Circadian Disruption Play a Role in the Metabolic-Hormonal Link to Delayed Lactogenesis II? Front Nutr 2015; 2:4. [PMID: 25988133 PMCID: PMC4428372 DOI: 10.3389/fnut.2015.00004] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2014] [Accepted: 02/05/2015] [Indexed: 11/13/2022] Open
Abstract
Breastfeeding improves maternal and child health. The American Academy of Pediatrics recommends exclusive breastfeeding for 6 months, with continued breastfeeding for at least 1 year. However, in the US, only 18.8% of infants are exclusively breastfed until 6 months of age. For mothers who initiate breastfeeding, the early post-partum period sets the stage for sustained breastfeeding. Mothers who experience breastfeeding problems in the early post-partum period are more likely to discontinue breastfeeding within 2 weeks. A major risk factor for shorter breastfeeding duration is delayed lactogenesis II (DLII; i.e., onset of milk "coming in" more than 72 h post-partum). Recent studies report a metabolic-hormonal link to DLII. This is not surprising because around the time of birth the mother's entire metabolism changes to direct nutrients to mammary glands. Circadian and metabolic systems are closely linked, and our rodent studies suggest circadian clocks coordinate hormonal and metabolic changes to support lactation. Molecular and environmental disruption of the circadian system decreases a dam's ability to initiate lactation and negatively impacts milk production. Circadian and metabolic systems evolved to be functional and adaptive when lifestyles and environmental exposures were quite different from modern times. We now have artificial lights, longer work days, and increases in shift work. Disruption in the circadian system due to shift work, jet-lag, sleep disorders, and other modern life style choices are associated with metabolic disorders, obesity, and impaired reproduction. We hypothesize that DLII is related to disruption of the mother's circadian system. Here, we review literature that supports this hypothesis, and describe interventions that may help to increase breastfeeding success.
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Affiliation(s)
- Manjie Fu
- Department of Statistics, Purdue University, West Lafayette, IN, USA
| | - Lingsong Zhang
- Department of Statistics, Purdue University, West Lafayette, IN, USA
| | - Azza Ahmed
- School of Nursing, Purdue University, West Lafayette, IN, USA
| | - Karen Plaut
- Department of Animal Sciences, Purdue University, West Lafayette, IN, USA
| | - David M. Haas
- Department of Obstetrics and Gynecology, School of Medicine, Indiana University, Indianapolis, IN, USA
| | - Kinga Szucs
- Department of Pediatrics, School of Medicine, Indiana University, Indianapolis, IN, USA
| | - Theresa M. Casey
- Department of Animal Sciences, Purdue University, West Lafayette, IN, USA
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191
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Almoznino G, Zini A, Sharav Y, Shahar A, Zlutzky H, Haviv Y, Lvovsky A, Aframian DJ. Sleep quality in patients with dental anxiety. J Psychiatr Res 2015; 61:214-22. [PMID: 25529787 DOI: 10.1016/j.jpsychires.2014.11.015] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/20/2014] [Revised: 09/26/2014] [Accepted: 11/28/2014] [Indexed: 12/23/2022]
Abstract
BACKGROUND Psychological distress is associated with sleep disturbances; however there is little research on sleep quality in dental anxiety (DA) patients. OBJECTIVES To measure the sleep quality in patients with DA compared to patients with an exacerbated gag reflex (GAG) and controls and to analyze its association with various demographic and behavioral parameters. METHODS 67 DA patients, 54 GAG patients and 100 controls with no history of DA or GAG participated in the study. Data regarding: demographic details, smoking habits, the Pittsburgh Sleep Quality Index (PSQI), Numeric Rating Scale (NRS) for pain assessment, Corah's dental anxiety scale (DAS) and Oral Health Impact Profile-14 (OHIP-14), plaque index (PI) and Decay, Missing and Filled Teeth (DMFT) scores were collected. RESULTS 49.3% of the DA group and 38.9% of the GAG group were poor sleepers (mean PSQI score > 5), compared to 29.0% of the controls (PSQI mean scores: 5.8 ± 3.4, DA group; 5.2 ± 3.6 GAG group vs. 4.5 ± 2.7, control group; p = 0.029). Compared to controls, DA and GAG patients exhibited poorer scores in the sleep disturbances PSQI component (p = 0.001). DA patients exhibited poorer scores in the sleep duration PSQI component compared to the control (p = 0.002) and GAG groups (p = 0.033). Female gender (p = 0.039), higher current (p = 0.046) and maximal NRS (p = 0.019), higher DAS (p < 0.001) and OHIP-14 (p < 0.001) scores and more missing teeth (p = 0.003) were positively associated with higher PSQI scores. CONCLUSIONS DA patients suffered more from impaired sleep than controls and GAGs. Impaired sleep in DA patients is multidimensional phenomenon influenced by the specific diagnosis, gender, pain, dental anxiety levels, dental experience and oral health related quality of life.
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Affiliation(s)
- Galit Almoznino
- Department of Oral Medicine, Oral and Maxillofacial Center, Medical Corps, Israel Defense Forces, Tel-Hashomer, Israel; Department of Oral Medicine, Hebrew University - Hadassah School of Dental Medicine, Jerusalem, Israel.
| | - Avraham Zini
- Department of Community Dentistry, Hebrew University - Hadassah School of Dental Medicine, Jerusalem, Israel
| | - Yair Sharav
- Department of Oral Medicine, Hebrew University - Hadassah School of Dental Medicine, Jerusalem, Israel
| | - Adi Shahar
- Department of Oral Medicine, Oral and Maxillofacial Center, Medical Corps, Israel Defense Forces, Tel-Hashomer, Israel; In partial fulfillment of DMD Degree, Hebrew University - Hadassah School of Dental Medicine, Jerusalem, Israel
| | - Hulio Zlutzky
- Department of Oral Medicine, Oral and Maxillofacial Center, Medical Corps, Israel Defense Forces, Tel-Hashomer, Israel
| | - Yaron Haviv
- Department of Oral Medicine, Hebrew University - Hadassah School of Dental Medicine, Jerusalem, Israel
| | - Alex Lvovsky
- Department of Oral Medicine, Oral and Maxillofacial Center, Medical Corps, Israel Defense Forces, Tel-Hashomer, Israel
| | - Doron J Aframian
- Department of Oral Medicine, Hebrew University - Hadassah School of Dental Medicine, Jerusalem, Israel
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192
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Brum MCB, Filho FFD, Schnorr CC, Bottega GB, Rodrigues TC. Shift work and its association with metabolic disorders. Diabetol Metab Syndr 2015; 7:45. [PMID: 25991926 PMCID: PMC4436793 DOI: 10.1186/s13098-015-0041-4] [Citation(s) in RCA: 104] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/17/2015] [Accepted: 05/07/2015] [Indexed: 11/10/2022] Open
Abstract
Although the health burden of shift work has not been extensively studied, evidence suggests that it may affect the metabolic balance and cause obesity and other metabolic disorders. Sleep deprivation, circadian desynchronization and behavioral changes in diet and physical activity are among the most commonly mentioned factors in studies of the association between night work and metabolic disorders. Individual adaptation to night work depends greatly on personal factors such as family and social life, but occupational interventions may also make a positive contribution to the transition to shift work, such as exposure to bright lights during the night shift, melatonin use, shift regularity and clockwise rotation, and dietary adaptations for the metabolic needs of night workers. The evaluation of the impact of night work on health and of the mechanisms underlying this relationship can serve as a basis for intervention strategies to minimize the health burden of shift work. This review aimed to identify highlights regarding therapeutic implications following the association between night and shift work and metabolic disorders, as well as the mechanisms and pathways responsible for these relationships.
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Affiliation(s)
- Maria Carlota Borba Brum
- />Division of Occupational Medicine, Hospital de Clínicas de Porto, Alegre, Rio Grande do Sul Brazil
- />Post-graduate program in Medical Sciences, Endocrinology, Universidade Federal do, Porto Alegre, Rio Grande do Sul Brazil
| | - Fábio Fernandes Dantas Filho
- />Division of Occupational Medicine, Hospital de Clínicas de Porto, Alegre, Rio Grande do Sul Brazil
- />Post-graduate program in Medical Sciences, Endocrinology, Universidade Federal do, Porto Alegre, Rio Grande do Sul Brazil
| | - Claudia Carolina Schnorr
- />Department of Internal Medicine, Medical School, Universidade Federal do, Porto Alegre, Rio Grande do Sul Brazil
| | - Gustavo Borchardt Bottega
- />Department of Internal Medicine, Medical School, Universidade Federal do, Porto Alegre, Rio Grande do Sul Brazil
| | - Ticiana C. Rodrigues
- />Post-graduate program in Medical Sciences, Endocrinology, Universidade Federal do, Porto Alegre, Rio Grande do Sul Brazil
- />Department of Internal Medicine, Medical School, Universidade Federal do, Porto Alegre, Rio Grande do Sul Brazil
- />Division of Endocrinology, Hospital de Clínicas de Porto Alegre, Rua Ramiro, Barcelos 2350, Prédio 12, 4° andar, Porto Alegre, Rio Grande do Sul 90035-003 Brazil
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193
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Nohara K, Yoo SH, Chen Z(J. Manipulating the circadian and sleep cycles to protect against metabolic disease. Front Endocrinol (Lausanne) 2015; 6:35. [PMID: 25852644 PMCID: PMC4369727 DOI: 10.3389/fendo.2015.00035] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/20/2015] [Accepted: 03/03/2015] [Indexed: 11/30/2022] Open
Abstract
Modernization of human society parallels an epidemic of metabolic disorders including obesity. Apart from excess caloric intake, a 24/7 lifestyle poses another important challenge to our metabolic health. Recent research under both laboratory and epidemiological settings has indicated that abnormal temporal organization of sleep and wakeful activities including food intake is a significant risk factor for metabolic disease. The circadian clock system is our intrinsic biological timer that regulates internal rhythms such as the sleep/wake cycle and also responses to external stimuli including light and food. Initially thought to be mainly involved in the timing of sleep, the clock, and/or clock genes may also play a role in sleep architecture and homeostasis. Importantly, an extensive body of evidence has firmly established a master regulatory role of the clock in energy balance. Together, a close relationship between well-timed circadian/sleep cycles and metabolic health is emerging. Exploiting this functional connection, an important holistic strategy toward curbing the epidemic of metabolic disorders (e.g., obesity) involves corrective measures on the circadian clock and sleep. In addition to behavioral and environmental interventions including meal timing and light control, pharmacological agents targeting sleep and circadian clocks promise convenient and effective applications. Recent studies, for example, have reported small molecules targeting specific clock components and displaying robust beneficial effects on sleep and metabolism. Furthermore, a group of clock-amplitude-enhancing small molecules (CEMs) identified via high-throughput chemical screens are of particular interest for future in vivo studies of their metabolic and sleep efficacies. Elucidating the functional relationship between clock, sleep, and metabolism will also have far-reaching implications for various chronic human diseases and aging.
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Affiliation(s)
- Kazunari Nohara
- Department of Biochemistry and Molecular Biology, The University of Texas Health Science Center at Houston, Houston, TX, USA
| | - Seung-Hee Yoo
- Department of Biochemistry and Molecular Biology, The University of Texas Health Science Center at Houston, Houston, TX, USA
| | - Zheng (Jake) Chen
- Department of Biochemistry and Molecular Biology, The University of Texas Health Science Center at Houston, Houston, TX, USA
- *Correspondence: Zheng (Jake) Chen, Department of Biochemistry and Molecular Biology, The University of Texas Health Science Center at Houston, 6431 Fannin Street, MSB 6.200, Houston, TX 77030, USA e-mail:
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194
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Briançon-Marjollet A, Weiszenstein M, Henri M, Thomas A, Godin-Ribuot D, Polak J. The impact of sleep disorders on glucose metabolism: endocrine and molecular mechanisms. Diabetol Metab Syndr 2015; 7:25. [PMID: 25834642 PMCID: PMC4381534 DOI: 10.1186/s13098-015-0018-3] [Citation(s) in RCA: 138] [Impact Index Per Article: 15.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/03/2014] [Accepted: 03/05/2015] [Indexed: 12/11/2022] Open
Abstract
Modern lifestyle has profoundly modified human sleep habits. Sleep duration has shortened over recent decades from 8 to 6.5 hours resulting in chronic sleep deprivation. Additionally, irregular sleep, shift work and travelling across time zones lead to disruption of circadian rhythms and asynchrony between the master hypothalamic clock and pacemakers in peripheral tissues. Furthermore, obstructive sleep apnea syndrome (OSA), which affects 4 - 15% of the population, is not only characterized by impaired sleep architecture but also by repetitive hemoglobin desaturations during sleep. Epidemiological studies have identified impaired sleep as an independent risk factor for all cause of-, as well as for cardiovascular, mortality/morbidity. More recently, sleep abnormalities were causally linked to impairments in glucose homeostasis, metabolic syndrome and Type 2 Diabetes Mellitus (T2DM). This review summarized current knowledge on the metabolic alterations associated with the most prevalent sleep disturbances, i.e. short sleep duration, shift work and OSA. We have focused on various endocrine and molecular mechanisms underlying the associations between inadequate sleep quality, quantity and timing with impaired glucose tolerance, insulin resistance and pancreatic β-cell dysfunction. Of these mechanisms, the role of the hypothalamic-pituitary-adrenal axis, circadian pacemakers in peripheral tissues, adipose tissue metabolism, sympathetic nervous system activation, oxidative stress and whole-body inflammation are discussed. Additionally, the impact of intermittent hypoxia and sleep fragmentation (key components of OSA) on intracellular signaling and metabolism in muscle, liver, fat and pancreas are also examined. In summary, this review provides endocrine and molecular explanations for the associations between common sleep disturbances and the pathogenesis of T2DM.
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Affiliation(s)
- Anne Briançon-Marjollet
- />Université Grenoble Alpes, HP2, F-38041 Grenoble, Cedex France
- />INSERM U1042, F-38041 Grenoble, Cedex France
| | - Martin Weiszenstein
- />Centre for Research on Diabetes, Metabolism and Nutrition, Third Faculty of Medicine, Charles University, Prague, Czech Republic
| | - Marion Henri
- />Université Grenoble Alpes, HP2, F-38041 Grenoble, Cedex France
- />INSERM U1042, F-38041 Grenoble, Cedex France
| | - Amandine Thomas
- />Université Grenoble Alpes, HP2, F-38041 Grenoble, Cedex France
- />INSERM U1042, F-38041 Grenoble, Cedex France
| | - Diane Godin-Ribuot
- />Université Grenoble Alpes, HP2, F-38041 Grenoble, Cedex France
- />INSERM U1042, F-38041 Grenoble, Cedex France
| | - Jan Polak
- />Centre for Research on Diabetes, Metabolism and Nutrition, Third Faculty of Medicine, Charles University, Prague, Czech Republic
- />2nd Internal Medicine Department, University Hospital Kralovske Vinohrady, Prague, Czech Republic
- />Sports Medicine Department, Third Faculty of Medicine, Charles University in Prague, Ruska 87, Praha 10, 100 00 Czech Republic
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195
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Bukowska A, Sobala W, Peplonska B. Rotating night shift work, sleep quality, selected lifestyle factors and prolactin concentration in nurses and midwives. Chronobiol Int 2014; 32:318-26. [PMID: 25364814 DOI: 10.3109/07420528.2014.975353] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
The pattern of secretion of many hormones, including prolactin, is dependent on the circadian rhythm. Night shift work involves exposure to artificial light at night and sleep deficiency, which in turn can affect prolactin synthesis. The aim of this study was to evaluate a possible association between night shift work characteristics, sleep quality, lifestyle factors and prolactin concentration, using data from a cross-sectional study of nurses and midwives. A cross-sectional study was conducted among 327 nurses and midwives currently working on rotating night shifts, and 330 nurses and midwives working during the day (aged 40-60 years) (388 premenopausal and 269 postmenopausal). Information about night shift work characteristics, lifestyle, reproductive factors, sleep pattern and other covariates was collected through a face-to-face interview, and from a one-week work and sleep diary completed by the subjects. Weight and height were measured. Prolactin concentration was measured in the morning blood sample using the electrochemiluminesence immunoassay method. Associations were analyzed using linear regression models adjusted for important confounders. Analyses were carried out separately in pre- and postmenopausal women. None of the night shift work or sleep characteristics was significantly associated with prolactin concentration. Prolactin concentration was significantly (p < 0.05) inversely associated with smoking and time of blood sample collection. These results were consistent among both pre- and postmenopausal women. Nulliparity was significantly positively associated with prolactin among premenopausal women, but inversely among postmenopausal. Age was related to prolactin among postmenopausal women only. Our study indicates that rotating night shift work is not associated with prolactin concentration. Smoking, parity, time of blood collection and age among postmenopausal women were significant determinants of prolactin.
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Affiliation(s)
- Agnieszka Bukowska
- Department of Environmental Epidemiology, Nofer Institute of Occupational Medicine , Lodz , Poland
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196
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Matsuo H, Iwamoto A, Otsuka T, Hishida Y, Akiduki S, Aoki M, Furuse M, Yasuo S. Effects of time ofl-ornithine administration on the diurnal rhythms of plasma growth hormone, melatonin, and corticosterone levels in mice. Chronobiol Int 2014; 32:225-34. [DOI: 10.3109/07420528.2014.965312] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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197
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Ritsche K, Nindl BC, Wideman L. Exercise-Induced growth hormone during acute sleep deprivation. Physiol Rep 2014; 2:2/10/e12166. [PMID: 25281616 PMCID: PMC4254093 DOI: 10.14814/phy2.12166] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
The effect of acute (24‐h) sleep deprivation on exercise‐induced growth hormone (GH) and insulin‐like growth factor‐1 (IGF‐1) was examined. Ten men (20.6 ± 1.4 years) completed two randomized 24‐h sessions including a brief, high‐intensity exercise bout following either a night of sleep (SLEEP) or (24‐h) sleep deprivation (SLD). Anaerobic performance (mean power [MP], peak power [PP], minimum power [MinP], time to peak power [TTPP], fatigue index, [FI]) and total work per sprint [TWPS]) was determined from four maximal 30‐sec Wingate sprints on a cycle ergometer. Self‐reported sleep 7 days prior to each session was similar between SLEEP and SLD sessions (7.92 ± 0.33 vs. 7.98 ± 0.39 h, P =0.656, respectively) and during the actual SLEEP session in the lab, the total amount of sleep was similar to the 7 days leading up to the lab session (7.72 ± 0.14 h vs. 7.92 ± 0.33 h, respectively) (P =0.166). No differences existed in MP, PP, MinP, TTPP, FI, TWPS, resting GH concentrations, time to reach exercise‐induced peak GH concentration (TTP), or free IGF‐1 between sessions. GH area under the curve (AUC) (825.0 ± 199.8 vs. 2212.9 ± 441.9 μg/L*min, P <0.01), exercise‐induced peak GH concentration (17.8 ± 3.7 vs. 39.6 ± 7.1 μg/L, P <0.01) and ΔGH (peak GH – resting GH) (17.2 ± 3.7 vs. 38.2 ± 7.3 μg/L, P <0.01) were significantly lower during the SLEEP versus SLD session. Our results indicate that the exercise‐induced GH response was significantly augmented in sleep‐deprived individuals. Human growth hormone release is heavily influenced by sleep and exercise. Our study shows that sleep deprivation dramatically augments the exercise‐induced human growth hormone response.
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Affiliation(s)
- Kevin Ritsche
- Department of Kinesiology, University of North Carolina-Greensboro, Greensboro, North Carolina, USA Department of Exercise Physiology, Winston-Salem State University, Winston-Salem, North Carolina, USA
| | - Bradly C Nindl
- US Army Institute of Public Health, US Army Public Health Command, Aberdeen, Proving Ground, Aberdeen, Maryland, USA
| | - Laurie Wideman
- Department of Kinesiology, University of North Carolina-Greensboro, Greensboro, North Carolina, USA
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198
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When time stands still: an integrative review on the role of chronodisruption in posttraumatic stress disorder. Curr Opin Psychiatry 2014; 27:385-92. [PMID: 25023884 DOI: 10.1097/yco.0000000000000079] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
PURPOSE OF REVIEW The human circadian system creates and maintains cellular and systemic rhythmicity essential to homeostasis. Loss of circadian rhythmicity fundamentally affects the neuroendocrine, immune and autonomic system, similar to chronic stress and, thus, may play a central role in the development of stress-related disorders. This article focuses on the role of circadian misalignment in the pathophysiology of posttraumatic stress disorder (PTSD). RECENT FINDINGS Sleep disruption is a core feature of PTSD supporting the important supraordinate pathophysiological role of circadian system in PTSD. Furthermore, direct and indirect human and animal PTSD research suggests circadian system linked neuroendocrine, immune, metabolic and autonomic dysregulation with blunted diurnal rhythms, specific sleep pattern pathologies and cognitive deficits, as well as endocannabinoid and neuropeptide Y system alterations and altered circadian gene expression, linking circadian misalignment to PTSD pathophysiology. SUMMARY PTSD development is associated with chronodisruption findings. Evaluation and treatment of sleep and circadian disruption should be the first steps in PTSD management. State-of-the-art methods of circadian rhythm assessment should be applied to bridge the gap between clinical significance and limited understanding of the relationship between traumatic stress, sleep and circadian system.
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199
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Abstract
PURPOSE OF REVIEW To highlight the adverse metabolic effects of sleep disruption and to open ground for research aimed at preventive measures. This area of research is especially relevant given the increasing prevalence of voluntary sleep curtailment, sleep disorders, diabetes, and obesity. RECENT FINDINGS Epidemiological studies have established an association between decreased self-reported sleep duration and an increased incidence of type 2 diabetes (T2D), obesity, and cardiovascular disease. Experimental laboratory studies have demonstrated that decreasing either the amount or quality of sleep decreases insulin sensitivity and decreases glucose tolerance. Experimental sleep restriction also causes physiological and behavioral changes that promote a positive energy balance. Although sleep restriction increases energy expenditure because of increased wakefulness, it can lead to a disproportionate increase in food intake, decrease in physical activity, and weight gain. SUMMARY Sleep disruption has detrimental effects on metabolic health. These insights may help in the development of new preventive and therapeutic approaches against obesity and T2D based on increasing the quality and/or quantity of sleep.
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Affiliation(s)
- Arlet V Nedeltcheva
- Medical Chronobiology Program, Division of Sleep and Circadian Disorders, Brigham & Women's Hospital, Boston, Massachusetts, USA
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200
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Abstract
Organisms experience dramatic fluctuations in demands and stresses over the course of the day. In order to maintain biological processes within physiological boundaries, mechanisms have evolved for anticipation of, and adaptation to, these daily fluctuations. Endocrine factors have an integral role in homeostasis. Not only do circulating levels of various endocrine factors oscillate over the 24 h period, but so too does responsiveness of target tissues to these signals or stimuli. Emerging evidence suggests that these daily endocrine oscillations do not occur solely in response to behavioural fluctuations associated with sleep-wake and feeding-fasting cycles, but are orchestrated by an intrinsic timekeeping mechanism known as the circadian clock. Disruption of circadian clocks by genetic and/or environmental factors seems to precipitate numerous common disorders, including the metabolic syndrome and cancer. Collectively, these observations suggest that strategies designed to realign normal circadian rhythmicities hold potential for the treatment of various endocrine-related disorders.
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Affiliation(s)
- Karen L. Gamble
- Division of Behavioral Neurobiology, Department of Psychiatry, University of Alabama at Birmingham, Birmingham, Alabama, USA
| | - Ryan Berry
- Division of Endocrinology, Diabetes, and Metabolism Department of Medicine, University of Alabama at Birmingham, Birmingham, Alabama, USA
| | - Stuart J. Frank
- Division of Endocrinology, Diabetes, and Metabolism Department of Medicine, University of Alabama at Birmingham, Birmingham, Alabama, USA
- Endocrinology Section, Medical Service, Birmingham VA Medical Center, Birmingham, AL, USA
| | - Martin E. Young
- Division of Cardiovascular Diseases, Department of Medicine, University of Alabama at Birmingham, Birmingham, Alabama, USA
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