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Lee PYC, Mohamed Afif A, Anthony A, Goodyear M, Lombardo P. Ambient light intensity affecting ultrasound operator detection of liver lesions in cine-clips. Radiography (Lond) 2024; 30:1151-1157. [PMID: 38843760 DOI: 10.1016/j.radi.2024.05.012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2024] [Revised: 05/20/2024] [Accepted: 05/22/2024] [Indexed: 07/03/2024]
Abstract
INTRODUCTION Ambient light (AL) is an important factor to improve ultrasound pathology detection. However, there are no established room AL levels recommended during an ultrasound examination. We aim to examine the diagnostic accuracy using different intensity of AL for the detection of liver lesions in anonymised pre-recorded cine-clips. METHODS Eight ultrasound operators with 5-14 years' professional experiences were prospectively recruited to evaluate 51 randomised cine-clips directly from one ultrasound machine. These 15-s clips of the right lobe of the liver in longitudinal and transverse planes were meant to simulate the ultrasound examination. Operators reviewed all cine-clips and responded to two questions per cine-clip regarding their detection performance under 3 AL settings; 3, 15 and 25 lux, at one lighting per visit. A repeat visit under each AL was performed to assess for intra-operator variability. Each operator completed six visits in total, with at least a 2-day washout period. The operators' performance was compared against imaging reference standards from contrast CT/MRI for cine-clips with lesion and serial US for those without. RESULTS AL with highest degree of diagnostic accuracy was found to be at 25 lux. Results from 8 operators revealed sensitivity ranged from 79% to 100%, specificity ranged from 94% to 100%. Positive and negative predictive values were up to 100% with AL at 25 lux. Both intra-and interrater reliability were excellent at 0.85-1.0 (0.79-0.98) and 0.98 (0.97, 0.99) respectively, with AL at 25 lux. CONCLUSION This study proved that ambient light intensity affects the ultrasound operator detection of liver lesions on cine-clips. IMPLICATIONS FOR PRACTICE Identifying suitable AL levels will influence future ultrasound room construct.
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Affiliation(s)
- P Y C Lee
- Department of Radiography, Allied Health Division, Singapore General Hospital, Singapore.
| | - A Mohamed Afif
- Department of Radiography, Allied Health Division, Singapore General Hospital, Singapore.
| | - A Anthony
- Department of Radiography, Allied Health Division, Singapore General Hospital, Singapore.
| | - M Goodyear
- School of Rural Health, Monash University, Clayton, Victoria, Australia.
| | - P Lombardo
- Department of Medical Imaging and Radiation Sciences, Monash University, Clayton, Victoria, Australia.
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Gubin D, Danilenko K, Stefani O, Kolomeichuk S, Markov A, Petrov I, Voronin K, Mezhakova M, Borisenkov M, Shigabaeva A, Yuzhakova N, Lobkina S, Weinert D, Cornelissen G. Blue Light and Temperature Actigraphy Measures Predicting Metabolic Health Are Linked to Melatonin Receptor Polymorphism. BIOLOGY 2023; 13:22. [PMID: 38248453 PMCID: PMC10813279 DOI: 10.3390/biology13010022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/15/2023] [Revised: 12/29/2023] [Accepted: 12/29/2023] [Indexed: 01/23/2024]
Abstract
This study explores the relationship between the light features of the Arctic spring equinox and circadian rhythms, sleep and metabolic health. Residents (N = 62) provided week-long actigraphy measures, including light exposure, which were related to body mass index (BMI), leptin and cortisol. Lower wrist temperature (wT) and higher evening blue light exposure (BLE), expressed as a novel index, the nocturnal excess index (NEIbl), were the most sensitive actigraphy measures associated with BMI. A higher BMI was linked to nocturnal BLE within distinct time windows. These associations were present specifically in carriers of the MTNR1B rs10830963 G-allele. A larger wake-after-sleep onset (WASO), smaller 24 h amplitude and earlier phase of the activity rhythm were associated with higher leptin. Higher cortisol was associated with an earlier M10 onset of BLE and with our other novel index, the Daylight Deficit Index of blue light, DDIbl. We also found sex-, age- and population-dependent differences in the parametric and non-parametric indices of BLE, wT and physical activity, while there were no differences in any sleep characteristics. Overall, this study determined sensitive actigraphy markers of light exposure and wT predictive of metabolic health and showed that these markers are linked to melatonin receptor polymorphism.
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Affiliation(s)
- Denis Gubin
- Department of Biology, Tyumen Medical University, 625023 Tyumen, Russia
- Laboratory for Chronobiology and Chronomedicine, Research Institute of Biomedicine and Biomedical Technologies, Tyumen Medical University, 625023 Tyumen, Russia; (K.D.); (A.S.)
- Tyumen Cardiology Research Center, Tomsk National Research Medical Center, Russian Academy of Sciences, 634009 Tomsk, Russia
| | - Konstantin Danilenko
- Laboratory for Chronobiology and Chronomedicine, Research Institute of Biomedicine and Biomedical Technologies, Tyumen Medical University, 625023 Tyumen, Russia; (K.D.); (A.S.)
- Institute of Neurosciences and Medicine, 630117 Novosibirsk, Russia
| | - Oliver Stefani
- Department Engineering and Architecture, Institute of Building Technology and Energy, Lucerne University of Applied Sciences and Arts, 6048 Horw, Switzerland;
| | - Sergey Kolomeichuk
- Laboratory for Genomics, Proteomics, and Metabolomics, Research Institute of Biomedicine and Biomedical Technologies, Medical University, 625023 Tyumen, Russia; (S.K.); (A.M.); (K.V.); (N.Y.)
- Laboratory of Genetics, Institute of Biology of the Karelian Science Center, Russian Academy of Sciences, 185910 Petrozavodsk, Russia
| | - Alexander Markov
- Laboratory for Genomics, Proteomics, and Metabolomics, Research Institute of Biomedicine and Biomedical Technologies, Medical University, 625023 Tyumen, Russia; (S.K.); (A.M.); (K.V.); (N.Y.)
| | - Ivan Petrov
- Department of Biological & Medical Physics UNESCO, Medical University, 625023 Tyumen, Russia
| | - Kirill Voronin
- Laboratory for Genomics, Proteomics, and Metabolomics, Research Institute of Biomedicine and Biomedical Technologies, Medical University, 625023 Tyumen, Russia; (S.K.); (A.M.); (K.V.); (N.Y.)
| | - Marina Mezhakova
- Laboratory for Genomics, Proteomics, and Metabolomics, Research Institute of Biomedicine and Biomedical Technologies, Medical University, 625023 Tyumen, Russia; (S.K.); (A.M.); (K.V.); (N.Y.)
| | - Mikhail Borisenkov
- Department of Molecular Immunology and Biotechnology, Institute of Physiology of the Federal Research Centre Komi Science Centre, Ural Branch of the Russian Academy of Sciences, 167982 Syktyvkar, Russia;
| | - Aislu Shigabaeva
- Laboratory for Chronobiology and Chronomedicine, Research Institute of Biomedicine and Biomedical Technologies, Tyumen Medical University, 625023 Tyumen, Russia; (K.D.); (A.S.)
| | - Natalya Yuzhakova
- Laboratory for Genomics, Proteomics, and Metabolomics, Research Institute of Biomedicine and Biomedical Technologies, Medical University, 625023 Tyumen, Russia; (S.K.); (A.M.); (K.V.); (N.Y.)
| | - Svetlana Lobkina
- Healthcare Institution of Yamalo-Nenets Autonomous Okrug “Tarko-Sale Central District Hospital”, 629850 Urengoy, Russia;
| | - Dietmar Weinert
- Institute of Biology/Zoology, Martin Luther University, 06108 Halle-Wittenberg, Germany;
| | - Germaine Cornelissen
- Department of Integrated Biology and Physiology, University of Minnesota, Minneapolis, MN 55455, USA;
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Chen Y, Liu N, Guo Y, Zheng C, Fu D, Cai Y, Nie K, Xia L. Effect of Liuzijue exercise in different periods on circadian rhythm of blood pressure in patients with essential hypertension: A randomized trial. Medicine (Baltimore) 2023; 102:e36481. [PMID: 38050268 PMCID: PMC10695507 DOI: 10.1097/md.0000000000036481] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/22/2023] [Accepted: 11/14/2023] [Indexed: 12/06/2023] Open
Abstract
BACKGROUND Exercising at different times of the day is a widely employed strategy for treating essential hypertension, aimed at enhancing the circadian rhythm of blood pressure. This study aimed to investigate the effects of Liuzijue exercise in the morning and afternoon on the circadian rhythm of blood pressure in patients with essential hypertension. METHODS This clinical randomized trial recruited 36 patients. They were randomly divided into 3 groups: morning exercise, afternoon exercise, and waiting treatment group. Randomization was performed at a ratio of 1:1:1, ensuring an equal distribution of participants among the 3 groups. Based on maintaining routine work and rest and continuing the original drug treatment, the exercise performed Liuzijue exercise for 12 weeks. The exercise time was 9:00 to 10:00 in the morning exercise group and 14:00 to 15:00 in the afternoon exercise group. The waiting treatment group did not perform any form of fitness exercise. The subjects in the 3 groups were monitored by 24-hour ambulatory blood pressure on the day before and after the first day. RESULTS After the 12-week Liuzijue exercise intervention, mean systolic blood pressure during the night significantly decreased in the morning exercise group (P < .01). In contrast, the waiting group experienced substantial increases in 24-hour mean systolic blood pressure (24hSBP), 24-hour mean diastolic blood pressure (24hDBP), mean systolic blood pressure during the daytime (dSBP), and mean diastolic blood pressure during the daytime (dDBP) (P < .01). Further analysis showed that the morning exercise group had significantly lower 24hSBP, 24hDBP, dSBP, dDBP, and mean systolic blood pressure during the night than the waiting group (P < .05). Additionally, the morning exercise group had lower 24hSBP and dSBP levels than the afternoon exercise group (P < .05). In contrast, the afternoon exercise group had lower 24hDBP and dDBP than the waiting treatment group (P < .05). CONCLUSIONS The 12-week Liuzijue exercise in the morning regimen demonstrated superior efficacy in reducing 24-hour ambulatory blood pressure levels among patients with essential hypertension. Moreover, it facilitates the transition of non-dipper blood pressure patterns to dippers, thereby rectifying aberrant circadian rhythms.
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Affiliation(s)
- Yixiao Chen
- School of Health Preservation and Rehabilitation, Chengdu University of TCM, Chengdu, China
- People’s Republic of China – Key Laboratory of Traditional Chinese Medicine Regimen and Health Industry Development, State Administration of TCM, Sichuan, China
- Key Laboratory of Traditional Chinese Medicine Health Preservation and Wellness in Sichuan Province, Sichuan, China
| | - Nannan Liu
- School of Health Preservation and Rehabilitation, Chengdu University of TCM, Chengdu, China
- People’s Republic of China – Key Laboratory of Traditional Chinese Medicine Regimen and Health Industry Development, State Administration of TCM, Sichuan, China
- Key Laboratory of Traditional Chinese Medicine Health Preservation and Wellness in Sichuan Province, Sichuan, China
| | - Yuyan Guo
- Chongqing Bishan District Medical and Health Affairs Center, Chongqin, China
| | | | - Dijun Fu
- The Southwest Hospital of AMU, Chongqin, China
| | - Yugang Cai
- The Daying Hospital of Traditional Chinese Medicine in Suining City, Suning, China
| | - Kaidi Nie
- School of Health Preservation and Rehabilitation, Chengdu University of TCM, Chengdu, China
- People’s Republic of China – Key Laboratory of Traditional Chinese Medicine Regimen and Health Industry Development, State Administration of TCM, Sichuan, China
- Key Laboratory of Traditional Chinese Medicine Health Preservation and Wellness in Sichuan Province, Sichuan, China
| | - Lina Xia
- School of Health Preservation and Rehabilitation, Chengdu University of TCM, Chengdu, China
- People’s Republic of China – Key Laboratory of Traditional Chinese Medicine Regimen and Health Industry Development, State Administration of TCM, Sichuan, China
- Key Laboratory of Traditional Chinese Medicine Health Preservation and Wellness in Sichuan Province, Sichuan, China
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Gubin D, Vetoshkin A, Shurkevich N, Gapon L, Borisenkov M, Cornelissen G, Weinert D. Chronotype and lipid metabolism in Arctic Sojourn Workers. Chronobiol Int 2023; 40:1198-1208. [PMID: 37700623 DOI: 10.1080/07420528.2023.2256839] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2022] [Revised: 06/13/2023] [Accepted: 09/02/2023] [Indexed: 09/14/2023]
Abstract
This study relates answers to the Munich Chronotype Questionnaire (MCTQ) and Pittsburgh Sleep Quality Index (PSQI) from Arctic Sojourn Workers (ASW) of Yamburg Settlement, 68° Latitude North, 75° Longitude East (n = 180; mean age ± SD; range: 49.2 ± 7.8; 25-66 y; 45% women) to Arctic Sojourn Work Experience (ASWE), age and health status. Chronotype, Mid Sleep on Free Days sleep corrected (MSFsc) and sleep characteristics of ASW were compared to those of age-matched Tyumen Residents (TR, n = 270; mean age ± SD; range: 48.4 ± 8.4; 25-69 y; 48% women), 57° Latitude North, 65° Longitude East. ASW have earlier MSFsc than TR (70 min in men, p < 0.0001, and 45 min in women, p < 0.0001). Unlike TR, their MSFsc was not associated with age (r = 0.037; p = 0.627) and was linked to a larger Social Jet Lag (+21 min in men; p = 0.003, and +18 min in women; p = 0.003). These differences were not due to outdoor light exposure (OLE): OLE on work (OLEw) or free (OLEf) days was not significantly different between ASW and TR in men and was significantly less in ASW than in TR women (OLEw: -31 min; p < 0.001; OLEf: -24 min; p = 0.036). ASWE, but not age, was associated with compromised lipid metabolism in men. After accounting for multiple testing, when corrected for age and sex, higher triglycerides to high-density lipoprotein ratio, TG/HDL correlated with ASWE (r = 0.271, p < 0.05). In men, greater SJL was associated with lower HDL (r = -0.204; p = 0.043). Worse proxies of metabolic health were related to unfavorable components of the Pittsburgh Sleep Quality Index in ASW. Higher OLE on free days was associated with lower systolic (b = -0.210; p < 0.05) and diastolic (b = -0.240; p < 0.05) blood pressure.
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Affiliation(s)
- Denis Gubin
- Laboratory for Chronobiology and Chronomedicine, Research Institute of Biomedicine and Biomedical Technologies, Medical University, Tyumen, Russia
- Department of Biology, Medical University, Tyumen, Russia
- Tyumen Cardiology Research Center, Tomsk National Research Medical Center, Russian Academy of Sciences, Tomsk, Russia
| | - Alexander Vetoshkin
- Tyumen Cardiology Research Center, Tomsk National Research Medical Center, Russian Academy of Sciences, Tomsk, Russia
- Medical Unit, Gazprom Dobycha Yamburg LLC, Novy Urengoy, Russia
| | - Nina Shurkevich
- Tyumen Cardiology Research Center, Tomsk National Research Medical Center, Russian Academy of Sciences, Tomsk, Russia
| | - Ludmila Gapon
- Tyumen Cardiology Research Center, Tomsk National Research Medical Center, Russian Academy of Sciences, Tomsk, Russia
| | - Mikhail Borisenkov
- Institute of Physiology of Komi Science Centre of the Ural Branch of the Russian Academy of Sciences, Syktyvkar, Russia
| | - Germaine Cornelissen
- Halberg Chronobiology Center, University of Minnesota, Minneapolis, Minnesota, USA
| | - Dietmar Weinert
- Institute of Biology/Zoology, Martin Luther University, Halle-Wittenberg, Halle, Germany
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Mukataeva Z, Dinmukhamedova A, Kabieva S, Baidalinova B, Khamzina S, Zekenova L, Aizman R. Comparative characteristics of developing morphofunctional features of schoolchildren from different climatic and geographical regions. J Pediatr Endocrinol Metab 2023; 36:158-166. [PMID: 36508610 DOI: 10.1515/jpem-2022-0474] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/19/2022] [Accepted: 11/25/2022] [Indexed: 12/15/2022]
Abstract
OBJECTIVES Adaptation processes in body of schoolchildren, along with study load and social factors, are determined by influence of climatic and geographical factors of residence region. This research has been undertaken to study the morphofunctional characteristics of schoolchildren at the age of 7-17 years. METHODS The research involved 880 schoolchildren of both sexes in age from 7 to 17 years, studying in secondary school №22 in Pavlodar (Kazakhstan) and secondary school №7 in Kyzylorda (Kazakhstan). The Quetelet index of northern schoolchildren was within the norm but higher compared to southern peers. RESULTS The Quetelet index was within the normal range for all schoolchildren, but higher among northerners. The indicator of the life index in the boys of the south was higher up to 10 years, then the adaptive possibilities of breathing decreased; in the girls in the north this indicator was higher in all periods, except for 8-9 years. The physical performance index (PWC170/kg) was higher in children from the southern region. CONCLUSIONS This study revealed significant geographical differences in the morphofunctional development of children. The obtained data served allowed establishing the "Electronic map of schoolchildren's health" and indicated the need for systematic accounting of schoolchildren's health indicators for effective development of differentiated prevention programs.
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Affiliation(s)
- Zhanat Mukataeva
- Department of General Biology and Genomics, L.N. Gumilyov Eurasian National University, Nur-Sultan, Kazakhstan
| | - Aigul Dinmukhamedova
- Department of General Biology and Genomics, L.N. Gumilyov Eurasian National University, Nur-Sultan, Kazakhstan
| | - Saltanat Kabieva
- Higher School of Natural Science, Pavlodar State Pedagogical University, Pavlodar, Kazakhstan
| | - Bibenur Baidalinova
- Higher School of Natural Science, Pavlodar State Pedagogical University, Pavlodar, Kazakhstan
| | - Saltanat Khamzina
- Department of Ecology, Life and Environmental Protection, A. Myrzakhmetov Kokshetau University, Kokshetau, Kazakhstan
| | - Laila Zekenova
- Department of General Biology and Genomics, L.N. Gumilyov Eurasian National University, Nur-Sultan, Kazakhstan
| | - Roman Aizman
- Department of Anatomy, Physiology and Life Safety Department, Novosibirsk State Pedagogical University, Novosibirsk, Russian Federation
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Jiao L, Wang Y, Zhang S, Wang Y, Liu Z, Liu Z, Zhou Y, Zhou H, Xu X, Li Z, Liu Z, Yu Z, Nie L, Zhou L, Jiang H. Melatonin improves cardiac remodeling and brain-heart sympathetic hyperactivation aggravated by light disruption after myocardial infarction. J Pineal Res 2022; 73:e12829. [PMID: 36031757 DOI: 10.1111/jpi.12829] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/27/2022] [Revised: 08/11/2022] [Accepted: 08/24/2022] [Indexed: 11/27/2022]
Abstract
Light in the external environment might affect cardiovascular function. The light disruption seems to be related to changes in cardiovascular physiological functions, and disturbing light may be a risk factor for cardiovascular diseases. Prior studies have found that light disruption after myocardial infarction (MI) exacerbates cardiac remodeling, and the brain-heart sympathetic nervous system may be one of the key mechanisms. However, how to improve light-disrupted cardiac remodeling remains unclear. Melatonin is an indoleamine secreted by the pineal gland and controlled by endogenous circadian oscillators within the suprachiasmatic nucleus, which is closely associated with light/dark cycle. This study aimed to explore whether melatonin could improve light-disrupted cardiac remodeling and modulate the brain-heart sympathetic nervous system. Our study revealed that light disruption reduced serum melatonin levels, aggravated cardiac sympathetic remodeling, caused overactivation of the brain-heart sympathetic nervous system, exacerbated cardiac dysfunction, and increased cardiac fibrosis after MI, while melatonin treatment improved light disruption-exacerbated cardiac remodeling and brain-heart sympathetic hyperactivation after MI. Furthermore, RNA-Seq results revealed the significant changes at the cardiac transcription level. In conclusion, melatonin may be a potential therapy for light-disrupted cardiac remodeling.
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Affiliation(s)
- Liying Jiao
- Department of Cardiology, Renmin Hospital of Wuhan University, Wuhan, China
- Cardiac Autonomic Nervous System Research Center of Wuhan University, Wuhan, China
- Cardiovascular Research Institute, Wuhan University, Wuhan, China
- Hubei Key Laboratory of Cardiology, Wuhan, 430060, China
| | - Yuhong Wang
- Department of Cardiology, Renmin Hospital of Wuhan University, Wuhan, China
- Cardiac Autonomic Nervous System Research Center of Wuhan University, Wuhan, China
- Cardiovascular Research Institute, Wuhan University, Wuhan, China
- Hubei Key Laboratory of Cardiology, Wuhan, 430060, China
| | - Song Zhang
- Department of Cardiology, Renmin Hospital of Wuhan University, Wuhan, China
- Cardiac Autonomic Nervous System Research Center of Wuhan University, Wuhan, China
- Cardiovascular Research Institute, Wuhan University, Wuhan, China
- Hubei Key Laboratory of Cardiology, Wuhan, 430060, China
| | - Yueyi Wang
- Department of Cardiology, Renmin Hospital of Wuhan University, Wuhan, China
- Cardiac Autonomic Nervous System Research Center of Wuhan University, Wuhan, China
- Cardiovascular Research Institute, Wuhan University, Wuhan, China
- Hubei Key Laboratory of Cardiology, Wuhan, 430060, China
| | - Zhihao Liu
- Department of Cardiology, Renmin Hospital of Wuhan University, Wuhan, China
- Cardiac Autonomic Nervous System Research Center of Wuhan University, Wuhan, China
- Cardiovascular Research Institute, Wuhan University, Wuhan, China
- Hubei Key Laboratory of Cardiology, Wuhan, 430060, China
| | - Zihan Liu
- Department of Cardiology, Renmin Hospital of Wuhan University, Wuhan, China
- Cardiac Autonomic Nervous System Research Center of Wuhan University, Wuhan, China
- Cardiovascular Research Institute, Wuhan University, Wuhan, China
- Hubei Key Laboratory of Cardiology, Wuhan, 430060, China
| | - Yuyang Zhou
- Department of Cardiology, Renmin Hospital of Wuhan University, Wuhan, China
- Cardiac Autonomic Nervous System Research Center of Wuhan University, Wuhan, China
- Cardiovascular Research Institute, Wuhan University, Wuhan, China
- Hubei Key Laboratory of Cardiology, Wuhan, 430060, China
| | - Huixin Zhou
- Department of Cardiology, Renmin Hospital of Wuhan University, Wuhan, China
- Cardiac Autonomic Nervous System Research Center of Wuhan University, Wuhan, China
- Cardiovascular Research Institute, Wuhan University, Wuhan, China
- Hubei Key Laboratory of Cardiology, Wuhan, 430060, China
| | - Xiao Xu
- Department of Cardiology, Renmin Hospital of Wuhan University, Wuhan, China
- Cardiac Autonomic Nervous System Research Center of Wuhan University, Wuhan, China
- Cardiovascular Research Institute, Wuhan University, Wuhan, China
- Hubei Key Laboratory of Cardiology, Wuhan, 430060, China
| | - Zeyan Li
- Department of Cardiology, Renmin Hospital of Wuhan University, Wuhan, China
- Cardiac Autonomic Nervous System Research Center of Wuhan University, Wuhan, China
- Cardiovascular Research Institute, Wuhan University, Wuhan, China
- Hubei Key Laboratory of Cardiology, Wuhan, 430060, China
| | - Zhihao Liu
- Department of Cardiology, Renmin Hospital of Wuhan University, Wuhan, China
- Cardiac Autonomic Nervous System Research Center of Wuhan University, Wuhan, China
- Cardiovascular Research Institute, Wuhan University, Wuhan, China
- Hubei Key Laboratory of Cardiology, Wuhan, 430060, China
| | - Zhongyang Yu
- Department of Cardiology, Renmin Hospital of Wuhan University, Wuhan, China
- Cardiac Autonomic Nervous System Research Center of Wuhan University, Wuhan, China
- Cardiovascular Research Institute, Wuhan University, Wuhan, China
- Hubei Key Laboratory of Cardiology, Wuhan, 430060, China
| | - Liqing Nie
- Department of Cardiology, Renmin Hospital of Wuhan University, Wuhan, China
- Cardiac Autonomic Nervous System Research Center of Wuhan University, Wuhan, China
- Cardiovascular Research Institute, Wuhan University, Wuhan, China
- Hubei Key Laboratory of Cardiology, Wuhan, 430060, China
| | - Liping Zhou
- Department of Cardiology, Renmin Hospital of Wuhan University, Wuhan, China
- Cardiac Autonomic Nervous System Research Center of Wuhan University, Wuhan, China
- Cardiovascular Research Institute, Wuhan University, Wuhan, China
- Hubei Key Laboratory of Cardiology, Wuhan, 430060, China
| | - Hong Jiang
- Department of Cardiology, Renmin Hospital of Wuhan University, Wuhan, China
- Cardiac Autonomic Nervous System Research Center of Wuhan University, Wuhan, China
- Cardiovascular Research Institute, Wuhan University, Wuhan, China
- Hubei Key Laboratory of Cardiology, Wuhan, 430060, China
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Circadian patterns of heart rate, respiratory rate and skin temperature in hospitalized COVID-19 patients. PLoS One 2022; 17:e0268065. [PMID: 35797369 PMCID: PMC9262173 DOI: 10.1371/journal.pone.0268065] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2021] [Accepted: 04/22/2022] [Indexed: 12/15/2022] Open
Abstract
Rationale
Vital signs follow circadian patterns in both healthy volunteers and critically ill patients, which seem to be influenced by disease severity in the latter. In this study we explored the existence of circadian patterns in heart rate, respiratory rate and skin temperature of hospitalized COVID-19 patients, and aimed to explore differences in circadian rhythm amplitude during patient deterioration.
Methods
We performed a retrospective study of COVID-19 patients admitted to the general ward of a tertiary hospital between April 2020 and March 2021. Patients were continuously monitored using a wireless sensor and fingertip pulse oximeter. Data was divided into three cohorts: patients who recovered, patients who developed respiratory insufficiency and patients who died. For each cohort, a population mean cosinor model was fitted to detect rhythmicity. To assess changes in amplitude, a mixed-effect cosinor model was fitted.
Results
A total of 429 patients were monitored. Rhythmicity was observed in heartrate for the recovery cohort (p<0.001), respiratory insufficiency cohort (p<0.001 and mortality cohort (p = 0.002). Respiratory rate showed rhythmicity in the recovery cohort (p<0.001), but not in the other cohorts (p = 0.18 and p = 0.51). Skin temperature also showed rhythmicity in the recovery cohort (p<0.001), but not in the other cohorts (p = 0.22 and p = 0.12). For respiratory insufficiency, only the amplitude of heart rate circadian pattern increased slightly the day before (1.2 (99%CI 0.16–2.2, p = 0.002)). In the mortality cohort, the amplitude of heart rate decreased (-1.5 (99%CI -2.6- -0.42, p<0.001)) and respiratory rate amplitude increased (0.72 (99%CI 0.27–1.3, p = 0.002) the days before death.
Conclusion
A circadian rhythm is present in heart rate of COVID-19 patients admitted to the general ward. For respiratory rate and skin temperature, rhythmicity was only found in patients who recover, but not in patients developing respiratory insufficiency or death. We found no consistent changes in circadian rhythm amplitude accompanying patient deterioration.
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Eo YJ, Park J, Kim S, Lee KN, Lee SM, Kim DH, Kim C, Do YR. Estimation of melatonin level and core body temperature: heart rate and heart rate variability as circadian rhythm markers. BIOL RHYTHM RES 2022. [DOI: 10.1080/09291016.2021.2024408] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
Affiliation(s)
- Yun Jae Eo
- Department of Chemistry, Kookmin University, Seoul, Republic of Korea
| | - Jingyu Park
- School of Electrical Engineering, Kookmin University, Seoul, Republic of Korea
| | - Seohyeon Kim
- School of Electrical Engineering, Kookmin University, Seoul, Republic of Korea
| | - Keyong Nam Lee
- Department of Chemistry, Kookmin University, Seoul, Republic of Korea
| | - Seung Min Lee
- School of Electrical Engineering, Kookmin University, Seoul, Republic of Korea
- Circadian ICT Research Center, Kookmin University, Seoul, Republic of Korea
| | - Dae Hwan Kim
- School of Electrical Engineering, Kookmin University, Seoul, Republic of Korea
- Circadian ICT Research Center, Kookmin University, Seoul, Republic of Korea
| | - Changwook Kim
- Circadian ICT Research Center, Kookmin University, Seoul, Republic of Korea
| | - Young Rag Do
- Department of Chemistry, Kookmin University, Seoul, Republic of Korea
- Circadian ICT Research Center, Kookmin University, Seoul, Republic of Korea
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Role of circadian rhythm and impact of circadian rhythm disturbance on the metabolism and disease. J Cardiovasc Pharmacol 2021; 79:254-263. [PMID: 34840256 DOI: 10.1097/fjc.0000000000001178] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/20/2021] [Accepted: 10/23/2021] [Indexed: 11/25/2022]
Abstract
ABSTRACT Molecular circadian clocks exist in almost all cells of the organism and operate for approximately 24 h, maintain the normal physiological and behavioral body processes and regulate metabolism of many cells related to a variety of disease states. Circadian rhythms regulate metabolism, mainly including neurotransmitters, hormones, amino acids and lipids. Circadian misalignment is related to metabolic syndromes, such as obesity, diabetes and hypertension, which have reached an alarming level in modern society. We reviewed the mechanism of the circadian clock and the interaction between circadian rhythm and metabolism, as well as circadian rhythm disturbance on the metabolism of hypertension, obesity and diabetes. Finally, we discuss how to use the circadian rhythm to prevent diseases. Thus, this review is a micro to macro discussion from the perspective of circadian rhythm and aims to provide basic ideas for circadian rhythm research and disease therapies.
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Bowles NP, Shea SA. Is the bedtime ingestion of hypertensive medications effective and safe? Sleep Med Rev 2021; 59:101511. [PMID: 34175781 DOI: 10.1016/j.smrv.2021.101511] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2021] [Accepted: 05/20/2021] [Indexed: 12/21/2022]
Affiliation(s)
- Nicole P Bowles
- Institute of Occupational Health Sciences, Oregon Health and Sciences University, Portland, OR 97239, USA.
| | - Steven A Shea
- Institute of Occupational Health Sciences, Oregon Health and Sciences University, Portland, OR 97239, USA
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11
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Actigraphy-derived rest-activity rhythms are associated with nocturnal blood pressure in young women. J Hypertens 2021; 39:2413-2421. [PMID: 34387571 DOI: 10.1097/hjh.0000000000002966] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
INTRODUCTION Misalignment between lifestyle behaviors and endogenous circadian rhythms is associated with elevated nocturnal blood pressure (BP) in experimental studies; however, less is known about free-living (i.e. nonlaboratory) circadian disruption and nocturnal BP. Additionally, sex-specific cardiovascular implications of circadian disruption are unclear. OBJECTIVE To examine the associations between rest--activity rhythms (RAR), a field-based estimate of circadian disruption, and nocturnal BP characteristics in male and female young adults. METHODS Fifty participants (20 ± 1 years; 20 men/30 women) underwent 24-h ambulatory BP monitoring following 14 days of wrist actigraphy. RAR variables of interdaily stability (day-to-day consistency in RAR), intradaily variability (within-day fragmentation of RAR), and relative amplitude (difference between peak vs. trough activity) were derived from actigraphy. Multivariable regression models of mean nocturnal SBP, DBP, and SBP dipping were generated to test main associations with RAR variables, and sex × RAR interactions. Daytime BP, race, BMI, physical activity, sleep duration, alcohol, caffeine, and sodium intake were considered as covariates. RESULTS In the full sample, no main associations between RAR and nocturnal BP characteristics were found. Sex interacted with RAR such that in women, higher interdaily stability (β = -5.39, 95% CI = -10.04 to -0.73, P = 0.024) and relative amplitude (β = -4.78, 95% CI = -9.22 to -0.34, P = 0.036) were both associated with lower nocturnal SBP. Sex-stratified multivariable models of nocturnal BP also revealed associations between interdaily stability and relative amplitude with SBP dipping in women (all P ≤ 0.01). No associations were apparent in men. CONCLUSION Consistent and high-amplitude RAR are favorably associated with nocturnal BP characteristics in young female adults.
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Nakamoto I, Uiji S, Okata R, Endo H, Tohyama S, Nitta R, Hashimoto S, Matsushima Y, Wakimoto J, Hashimoto S, Nishiyama Y, Kanikowska D, Negoro H, Wakamura T. Diurnal rhythms of urine volume and electrolyte excretion in healthy young men under differing intensities of daytime light exposure. Sci Rep 2021; 11:13097. [PMID: 34162962 PMCID: PMC8222329 DOI: 10.1038/s41598-021-92595-0] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2021] [Accepted: 06/14/2021] [Indexed: 11/17/2022] Open
Abstract
In humans, most renal functions, including urine volume and electrolyte excretions, have a circadian rhythm. Light is a strong circadian entrainment factor and daytime-light exposure is known to affect the circadian rhythm of rectal temperature (RT). The effects of daytime-light exposure on the diurnal rhythm of urinary excretion have yet to be clarified. The aim of this study was to clarify whether and how daytime exposure to bright-light affects urinary excretions. Twenty-one healthy men (21–27 years old) participated in a 4-day study involving daytime (08:00–18:00 h) exposure to two light conditions, Dim (< 50 lx) and Bright (~ 2500 lx), in a random order. During the experiment, RT was measured continuously. Urine samples were collected every 3 ~ 4 h. Compared to the Dim condition, under the Bright condition, the RT nadir time was 45 min earlier (p = 0.017) and sodium (Na), chloride (Cl), and uric acid (UA) excretion and urine volumes were greater (all p < 0.001), from 11:00 h to 13:00 h without a difference in total daily urine volume. The present results suggest that daytime bright light exposure can induce a phase shift advance in urine volume and urinary Na, Cl, and UA excretion rhythms.
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Affiliation(s)
- Isuzu Nakamoto
- Human Health Sciences, Graduate School of Medicine, Kyoto University, 53 kawahara-cho, shogoin, sakyo-ku, Kyoto, 606-8507, Japan
| | - Sayaka Uiji
- Human Health Sciences, Graduate School of Medicine, Kyoto University, 53 kawahara-cho, shogoin, sakyo-ku, Kyoto, 606-8507, Japan
| | - Rin Okata
- Human Health Sciences, Faculty of Medicine, Kyoto University, Kyoto, Japan
| | - Hisayoshi Endo
- Human Health Sciences, Faculty of Medicine, Kyoto University, Kyoto, Japan
| | - Sena Tohyama
- Human Health Sciences, Faculty of Medicine, Kyoto University, Kyoto, Japan
| | - Rina Nitta
- Human Health Sciences, Faculty of Medicine, Kyoto University, Kyoto, Japan
| | - Saya Hashimoto
- Human Health Sciences, Faculty of Medicine, Kyoto University, Kyoto, Japan
| | - Yoshiko Matsushima
- Human Health Sciences, Graduate School of Medicine, Kyoto University, 53 kawahara-cho, shogoin, sakyo-ku, Kyoto, 606-8507, Japan
| | - Junko Wakimoto
- Clinical Laboratory, Kyoto University Hospital, Kyoto, Japan
| | - Seiji Hashimoto
- Clinical Laboratory, Kyoto University Hospital, Kyoto, Japan
| | | | - Dominika Kanikowska
- Department of Pathophysiology, Poznan University of Medical Sciences, Poznan, Poland
| | | | - Tomoko Wakamura
- Human Health Sciences, Graduate School of Medicine, Kyoto University, 53 kawahara-cho, shogoin, sakyo-ku, Kyoto, 606-8507, Japan.
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Gubin D, Neroev V, Malishevskaya T, Cornelissen G, Astakhov SY, Kolomeichuk S, Yuzhakova N, Kabitskaya Y, Weinert D. Melatonin mitigates disrupted circadian rhythms, lowers intraocular pressure, and improves retinal ganglion cells function in glaucoma. J Pineal Res 2021; 70:e12730. [PMID: 33730443 DOI: 10.1111/jpi.12730] [Citation(s) in RCA: 33] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/08/2021] [Revised: 03/11/2021] [Accepted: 03/12/2021] [Indexed: 02/06/2023]
Abstract
Glaucoma is a progressive optic neuropathy associated with damage to retinal ganglion cells (RGCs) and disrupted circadian rhythms. Melatonin is a promising substance to ameliorate glaucoma-associated compromised circadian rhythms, sleep, mood, and retinal cells function. However, studies estimating melatonin effects in glaucoma are currently lacking. Therefore, In this study, we investigated the effect of long-term (daily at 10:30 pm for 90 days) oral melatonin administration on systemic (Tb) and local to the organ of vision (IOP) circadian rhythms, pattern electroretinogram (PERG), sleep, and mood, depending on glaucoma stage in patients diagnosed with stable or advanced primary open-angle glaucoma. In a laboratory study in 15 of them, 24-hour records of salivary melatonin were obtained and MTNR1B receptor gene polymorphism was assessed. Melatonin increased the stability of the Tb circadian rhythm by improving its phase alignment and alignment with IOP. Melatonin time-dependently decreased IOP and IOP standard deviation (SD). IOP 24-hour mean and IOP SD decreases were more pronounced in individuals with the higher initial 24-hour IOP mean. Melatonin improved RGCs function in advanced glaucoma; N95 amplitude increase correlated positively with RGCs loss. The beneficial effects of melatonin on sleep and mood were greater in advanced glaucoma. Finally, delayed salivary melatonin and Tb phases were observed in MTNR1B G-allele carriers with advanced glaucoma. Combined, these results provide evidence for melatonin efficiency in restoring disrupted circadian rhythms in glaucoma with different effects of melatonin on systemic vs. local circadian rhythms, indicating that a personalized strategy of melatonin administration may further refine its treatment benefits.
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Affiliation(s)
- Denis Gubin
- Department of Biology, Medical University, Tyumen, Russia
- Tyumen Cardiology Research Center, Tomsk National Research Medical Center, Russian Academy of Science, Tomsk, Russia
| | - Vladimir Neroev
- Helmholtz Moscow Research Institute of Eye Diseases, Moscow, Russia
| | | | - Germaine Cornelissen
- Department of Integrated Biology and Physiology, University of Minnesota, Minneapolis, MN, USA
| | - Sergei Y Astakhov
- Pavlov First Saint Petersburg State Medical University, St. Petersburg, Russia
| | - Sergey Kolomeichuk
- Laboratory of Genetics, Institute of Biology of the Karelian Science Center of the Russian Academy of Sciences, Petrozavodsk, Russia
| | | | - Yana Kabitskaya
- Center for Genomic Technologies, Northern Trans-Ural State Agricultural University, Tyumen, Russia
| | - Dietmar Weinert
- Institute of Biology/Zoology, Martin Luther University, Halle-Wittenberg, Germany
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Neroev V, Malishevskaya T, Weinert D, Astakhov S, Kolomeichuk S, Cornelissen G, Kabitskaya Y, Boiko E, Nemtsova I, Gubin D. Disruption of 24-Hour Rhythm in Intraocular Pressure Correlates with Retinal Ganglion Cell Loss in Glaucoma. Int J Mol Sci 2020; 22:ijms22010359. [PMID: 33396443 PMCID: PMC7795318 DOI: 10.3390/ijms22010359] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2020] [Revised: 12/27/2020] [Accepted: 12/28/2020] [Indexed: 02/08/2023] Open
Abstract
Parameters of 24-h rhythm in intraocular pressure (IOP) were assessed in patients with stable or advanced primary open-angle glaucoma (S-POAG/A-POAG) and referenced to the phase of “marker” circadian temperature rhythm of each patient. Body temperature and IOP were measured over a 72-h span in 115 participants (65 S-POAG and 50 A-POAG). Retinal Ganglion Cell (RGC) damage was assessed by high-definition optical coherence tomography. The 24-h IOP rhythm in A-POAG patients peaked during the night, opposite to the daytime phase position in S-POAG patients (p < 0.0001). The 24-h IOP phase correlated with RGC loss (p < 0.0001). The internal phase shift between IOP and body temperature gradually increased with POAG progression (p < 0.001). Angiotensin converting enzyme Alu-repeat deletion/insertion (ACE I/D) emerged as a candidate gene polymorphism, which may play a role in the alteration of the circadian IOP variability in advanced glaucoma. To conclude, a reliable estimation of the 24-h rhythm in IOP requires the degree of RGC damage to be assessed. In advanced POAG, the 24-h phase of IOP tended to occur during the night and correlated with RGC loss, being progressively delayed relative to the phase of temperature.
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Affiliation(s)
- Vladimir Neroev
- Helmholtz Research Institute of Eye Diseases, 105062 Moscow, Russia; (V.N.); (T.M.)
| | | | - Dietmar Weinert
- Institute of Biology/Zoology, Martin Luther University, 06108 Halle-Wittenberg, Germany;
| | - Sergei Astakhov
- Department of Ophthalmology, Pavlov First Saint Petersburg State Medical University, 197022 St. Petersburg, Russia;
| | - Sergey Kolomeichuk
- Laboratory of Genetics, Institute of Biology of the Karelian Science Center of the Russian Academy of Sciences, 185910 Petrozavodsk, Russia;
| | - Germaine Cornelissen
- Halberg Chronobiology Center, University of Minnesota, Minneapolis, MN 55455, USA;
| | - Yana Kabitskaya
- Сenter for Genomic Technologies, Northern Trans-Ural State Agricultural University, 625003 Tyumen, Russia; (Y.K.); (E.B.)
| | - Elena Boiko
- Сenter for Genomic Technologies, Northern Trans-Ural State Agricultural University, 625003 Tyumen, Russia; (Y.K.); (E.B.)
| | - Irina Nemtsova
- State Autonomous Health Care Institution Tyumen Regional Ophthalmological Dispensary, 625048 Tyumen, Russia;
| | - Denis Gubin
- Department of Biology, Medical University, 625023 Tyumen, Russia
- Tyumen Cardiology Research Center, Tomsk National Research Medical Center, Russian Academy of Science, 634009 Tomsk, Russia
- Correspondence:
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Kaduk SI, Roberts APJ, Stanton NA. The circadian effect on psychophysiological driver state monitoring. THEORETICAL ISSUES IN ERGONOMICS SCIENCE 2020. [DOI: 10.1080/1463922x.2020.1842548] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Affiliation(s)
- Sylwia I. Kaduk
- Human Factors Engineering, Transportation Research Group, Faculty of Engineering and Physical Sciences, University of Southampton, Southampton, United Kingdom
| | - Aaron P. J. Roberts
- Human Factors Engineering, Transportation Research Group, Faculty of Engineering and Physical Sciences, University of Southampton, Southampton, United Kingdom
| | - Neville A. Stanton
- Human Factors Engineering, Transportation Research Group, Faculty of Engineering and Physical Sciences, University of Southampton, Southampton, United Kingdom
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Cakan P, Yildiz S. Effects of Half- or Whole-Night Shifts on Physiological and Cognitive Parameters in Women. Am J Med Sci 2020; 360:525-536. [DOI: 10.1016/j.amjms.2019.12.002] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2019] [Revised: 11/29/2019] [Accepted: 12/02/2019] [Indexed: 12/11/2022]
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van Kraaij AWJ, Schiavone G, Lutin E, Claes S, Van Hoof C. Relationship Between Chronic Stress and Heart Rate Over Time Modulated by Gender in a Cohort of Office Workers: Cross-Sectional Study Using Wearable Technologies. J Med Internet Res 2020; 22:e18253. [PMID: 32902392 PMCID: PMC7511872 DOI: 10.2196/18253] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2020] [Revised: 06/12/2020] [Accepted: 07/07/2020] [Indexed: 01/24/2023] Open
Abstract
Background Chronic stress is increasing in prevalence and is associated with several physical and mental disorders. Although it is proven that acute stress changes physiology, much less is known about the relationship between physiology and long-term stress. Continuous measurement of vital signs in daily life and chronic stress detection algorithms could serve this purpose. For this, it is paramount to model the effects of chronic stress on human physiology and include other cofounders, such as demographics, enabling the enrichment of a population-wide approach with individual variations. Objective The main objectives of this study were to investigate the effect of chronic stress on heart rate (HR) over time while correcting for weekdays versus weekends and to test a possible modulation effect by gender and age in a healthy cohort. Methods Throughout 2016 and 2017, healthy employees of technology companies were asked to participate in a 5-day observation stress study. They were required to wear two wearables, of which one included an electrocardiogram sensor. The derived HR was averaged per hour and served as an output for a mixed design model including a trigonometric fit over time with four harmonics (periods of 24, 12, 8, and 6 hours), gender, age, whether it was a workday or weekend day, and a chronic stress score derived from the Perceived Stress Scale (PSS) as predictors. Results The study included 328 subjects, of which 142 were female and 186 were male participants, with a mean age of 38.9 (SD 10.2) years and a mean PSS score of 13.7 (SD 6.0). As main effects, gender (χ21=24.02, P<.001); the hour of the day (χ21=73.22, P<.001); the circadian harmonic (χ22=284.4, P<.001); and the harmonic over 12 hours (χ22=242.1, P<.001), over 8 hours (χ22=23.78, P<.001), and over 6 hours (χ22=82.96, P<.001) had a significant effect on HR. Two three-way interaction effects were found. The interaction of age, whether it was a workday or weekend day, and the circadian harmonic over time were significantly correlated with HR (χ22=7.13, P=.03), as well as the interaction of gender, PSS score, and the circadian harmonic over time (χ22=7.59, P=.02). Conclusions The results show a relationship between HR and the three-way interaction of chronic stress, gender, and the circadian harmonic. The modulation by gender might be related to evolution-based energy utilization strategies, as suggested in related literature studies. More research, including daily cortisol assessment, longer recordings, and a wider population, should be performed to confirm this interpretation. This would enable the development of more complete and personalized models of chronic stress.
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Affiliation(s)
- Alex Wilhelmus Jacobus van Kraaij
- Holst Centre, imec-the Netherlands, Eindhoven, Netherlands.,OnePlanet Research Center, imec-the Netherlands, Wageningen, Netherlands.,Faculty of Natural Sciences, Math and Informatics (FNWI), Radboud University, Nijmegen, Netherlands
| | - Giuseppina Schiavone
- Holst Centre, imec-the Netherlands, Eindhoven, Netherlands.,OnePlanet Research Center, imec-the Netherlands, Wageningen, Netherlands
| | - Erika Lutin
- Electrical Engineering-ESAT, KU Leuven, Leuven, Belgium.,imec-Belgium, Heverlee, Belgium
| | - Stephan Claes
- University Psychiatric Center & Department of Neurosciences, KU Leuven, Leuven, Belgium
| | - Chris Van Hoof
- Holst Centre, imec-the Netherlands, Eindhoven, Netherlands.,OnePlanet Research Center, imec-the Netherlands, Wageningen, Netherlands.,Electrical Engineering-ESAT, KU Leuven, Leuven, Belgium.,imec-Belgium, Heverlee, Belgium
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Multilevel Analysis of 24-Hour Blood Pressure, Heart Rate, and Associated Factors among Police Officers in Hanoi, Vietnam. BIOMED RESEARCH INTERNATIONAL 2020; 2020:7494906. [PMID: 32550233 PMCID: PMC7255014 DOI: 10.1155/2020/7494906] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/07/2018] [Revised: 04/03/2019] [Accepted: 05/26/2019] [Indexed: 12/15/2022]
Abstract
Background Due to long-hour outdoor working environment, policemen have been subjected to tremendous health risks including blood pressure (BP) and heart rate (HR). In tropical countries, the temperature is extremely harsh which may get peak at above 40 Celsius degrees or drops under 8 Celsius degrees. However, the existing data on the effects of weather variation on BP and HR among police task force has been scarce in Vietnam. Aims This study aimed to describe the variation of 24-hour BP and HR and identify factors associated with BP and HR for further appropriate interventions in order to reduce health risks from occupational exposure. Methods Multilevel regression analysis (MLRA) was applied with two levels of influent factors. 24-hour holter measured systolic blood pressure (SBP), diastolic blood pressure (DBP), and HR values were the first level which should then be nested in the second level (individual). 24-hour temperature and humidity variations were extracted, respectively, from Hanoi Hydrometeorology Department. All individual characteristics and risk behaviours were measured within 24 studying hours. Results Temperature and humidity were major factors that influenced (74%-78%) the variation of BP and HR among the policemen population. When each of the Celsius degree temperature or percentage humidity increases, the SBP goes down by 0.44 (0.11-0.77) and by 0.2 (0.33-0.77), respectively, and the DBP goes down by 0.21 (-0.05-0.48) and by 0.12 (0.02-0.22), respectively, and vice versa. Interaction between temperature and humidity was significantly influent to SBP. The farther the time section from the first time section (0-6AM) the more the variation of the BP and HR. Transition from winter to summer made SBP and DBP decrease and vice versa. Individual characteristics including body mass index (BMI), bad life styles, and stress contributed 22% to 26% to the variation of BP and HR. Traffic policemen were at the greatest risks of the outdoor ambient variation in comparison with the firefighters and office-based policemen. Conclusion Designing and equipping appropriate uniform and outdoor facilities could help to reduce influence of temperature and humidity variation in the outdoor workplace. Besides, training and educating programs that aimed at controlling BMI, risk behaviours, and stress for police taskforce, especially the traffic policemen, should be implemented.
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Jiang Y, Gu Y, Xu H, Tian X, Zhang X, Xu X, Yan W, Zhang X. Bromide impairs the circadian clock and glycolytic homeostasis via disruption of autophagy in rat H9C2 cardiomyocytes. BMC Mol Cell Biol 2020; 21:44. [PMID: 32560625 PMCID: PMC7304218 DOI: 10.1186/s12860-020-00289-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2019] [Accepted: 06/09/2020] [Indexed: 12/11/2022] Open
Abstract
Background Trace elements function as essential cofactors that are involved in various biochemical processes in mammals. Autophagy is vital for nutrient supplement, which is an important Zeitegber for the circadian homeostasis in heart. Here, we considered the possibility that autophagy, as well as the cardiomyocyte clock and glycolysis are interlinked. Detrimental effects were observed when cardiac system is exposed to bromine containing drugs. This study investigated the effects and mechanisms of bromide on the circadian clock and glycolytic metabolism of H9C2 cardiomyocytes. Results In the present study, bromide does not affect cell viability and apoptosis of H9C2 cardiomyocytes. Bromide dampens the clock and glycolytic (Hk2 and Pkm2) gene expression rhythmicity in a dose-dependent manner. Additionally, bromide inhibits autophagic process in H9C2 cardiomyocytes. In contrast, rapamycin (an autophagy inducer) dramatically restores the inhibitory effect of NaBr on the mRNA expression levels of clock genes (Bmal1, Cry1 and Rorα) and glycolytic genes (Hk2 and Pkm2). Conclusions Our results reveal that bromide represses the clock and glycolytic gene expression patterns, partially through inhibition of autophagy.
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Affiliation(s)
- Yicheng Jiang
- The Affiliated Huai'an No.1 People's Hospital of Nanjing Medical University, No. 1 Huanghe West Road, Huaiyin District, Huai'an, 223300, Jiangsu, China
| | - Yang Gu
- The Affiliated Huai'an No.1 People's Hospital of Nanjing Medical University, No. 1 Huanghe West Road, Huaiyin District, Huai'an, 223300, Jiangsu, China
| | - Hai Xu
- The Affiliated Huai'an No.1 People's Hospital of Nanjing Medical University, No. 1 Huanghe West Road, Huaiyin District, Huai'an, 223300, Jiangsu, China
| | - Xiaoyi Tian
- The Affiliated Huai'an No.1 People's Hospital of Nanjing Medical University, No. 1 Huanghe West Road, Huaiyin District, Huai'an, 223300, Jiangsu, China
| | - Xuefeng Zhang
- The Affiliated Huai'an No.1 People's Hospital of Nanjing Medical University, No. 1 Huanghe West Road, Huaiyin District, Huai'an, 223300, Jiangsu, China
| | - Xiaojin Xu
- The Affiliated Huai'an No.1 People's Hospital of Nanjing Medical University, No. 1 Huanghe West Road, Huaiyin District, Huai'an, 223300, Jiangsu, China
| | - Wenting Yan
- The Affiliated Huai'an No.1 People's Hospital of Nanjing Medical University, No. 1 Huanghe West Road, Huaiyin District, Huai'an, 223300, Jiangsu, China
| | - Xiwen Zhang
- The Affiliated Huai'an No.1 People's Hospital of Nanjing Medical University, No. 1 Huanghe West Road, Huaiyin District, Huai'an, 223300, Jiangsu, China.
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Chakraborty S, Mandal J, Cheng X, Galla S, Hindupur A, Saha P, Yeoh BS, Mell B, Yeo JY, Vijay-Kumar M, Yang T, Joe B. Diurnal Timing Dependent Alterations in Gut Microbial Composition Are Synchronously Linked to Salt-Sensitive Hypertension and Renal Damage. Hypertension 2020; 76:59-72. [PMID: 32450738 DOI: 10.1161/hypertensionaha.120.14830] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Alterations of diurnal rhythms of blood pressure (BP) and reshaping of gut microbiota are both independently associated with hypertension. However, the relationships between biorhythms of BP and gut microbial composition are unknown. We hypothesized that diurnal timing-associated alterations of microbial compositions are synchronous with diurnal rhythmicity, dip in BP, and renal function. To test this hypothesis, Dahl salt-sensitive (S) rats on low- and high-salt diets were examined for time of day effects on gut microbiota, BP, and indicators of renal damage. Major shifts in night and day patterns of specific groups of microbiota were observed between the dark (active) and light (rest) phases, which correlated with diurnal rhythmicity of BP. The diurnal abundance of Firmicutes, Bacteroidetes, and Actinobacteria were independently associated with BP. Discrete bacterial taxa were observed to correlate independently or interactively with one or more of the following 3 factors: (1) BP rhythm, (2) dietary salt, and (3) dip in BP. Phylogenetic Investigation of Communities revealed diurnal timing effects on microbial pathways, characterized by upregulated biosynthetic processes during the active phase of host, and upregulated degradation pathways of metabolites in the resting phase. Additional metagenomics functional pathways with rhythm variations were noted for aromatic amino acid metabolism and taurine metabolism. These diurnal timing dependent changes in microbiota, their functional pathways, and BP dip were associated with concerted effects of the levels of renal lipocalin 2 and kidney injury molecule-1 expression. These data provide evidence for a firm and concerted diurnal timing effects of BP, renal damage, and select microbial communities.
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Affiliation(s)
- Saroj Chakraborty
- From the Microbiome Consortium, Center for Hypertension and Precision Medicine, University of Toledo College of Medicine and Life Sciences, Toledo, OH; and Department of Physiology and Pharmacology, University of Toledo College of Medicine and Life Sciences, Toledo, OH (S.J., J.M., X.C., S.G., A.H., P.S., B.S.Y., B.M., J.-Y.Y., M.V-K., T.Y., B.J.)
| | - Juthika Mandal
- From the Microbiome Consortium, Center for Hypertension and Precision Medicine, University of Toledo College of Medicine and Life Sciences, Toledo, OH; and Department of Physiology and Pharmacology, University of Toledo College of Medicine and Life Sciences, Toledo, OH (S.J., J.M., X.C., S.G., A.H., P.S., B.S.Y., B.M., J.-Y.Y., M.V-K., T.Y., B.J.)
| | - Xi Cheng
- From the Microbiome Consortium, Center for Hypertension and Precision Medicine, University of Toledo College of Medicine and Life Sciences, Toledo, OH; and Department of Physiology and Pharmacology, University of Toledo College of Medicine and Life Sciences, Toledo, OH (S.J., J.M., X.C., S.G., A.H., P.S., B.S.Y., B.M., J.-Y.Y., M.V-K., T.Y., B.J.)
| | - Sarah Galla
- From the Microbiome Consortium, Center for Hypertension and Precision Medicine, University of Toledo College of Medicine and Life Sciences, Toledo, OH; and Department of Physiology and Pharmacology, University of Toledo College of Medicine and Life Sciences, Toledo, OH (S.J., J.M., X.C., S.G., A.H., P.S., B.S.Y., B.M., J.-Y.Y., M.V-K., T.Y., B.J.)
| | - Anay Hindupur
- From the Microbiome Consortium, Center for Hypertension and Precision Medicine, University of Toledo College of Medicine and Life Sciences, Toledo, OH; and Department of Physiology and Pharmacology, University of Toledo College of Medicine and Life Sciences, Toledo, OH (S.J., J.M., X.C., S.G., A.H., P.S., B.S.Y., B.M., J.-Y.Y., M.V-K., T.Y., B.J.)
| | - Piu Saha
- From the Microbiome Consortium, Center for Hypertension and Precision Medicine, University of Toledo College of Medicine and Life Sciences, Toledo, OH; and Department of Physiology and Pharmacology, University of Toledo College of Medicine and Life Sciences, Toledo, OH (S.J., J.M., X.C., S.G., A.H., P.S., B.S.Y., B.M., J.-Y.Y., M.V-K., T.Y., B.J.)
| | - Beng San Yeoh
- From the Microbiome Consortium, Center for Hypertension and Precision Medicine, University of Toledo College of Medicine and Life Sciences, Toledo, OH; and Department of Physiology and Pharmacology, University of Toledo College of Medicine and Life Sciences, Toledo, OH (S.J., J.M., X.C., S.G., A.H., P.S., B.S.Y., B.M., J.-Y.Y., M.V-K., T.Y., B.J.)
| | - Blair Mell
- From the Microbiome Consortium, Center for Hypertension and Precision Medicine, University of Toledo College of Medicine and Life Sciences, Toledo, OH; and Department of Physiology and Pharmacology, University of Toledo College of Medicine and Life Sciences, Toledo, OH (S.J., J.M., X.C., S.G., A.H., P.S., B.S.Y., B.M., J.-Y.Y., M.V-K., T.Y., B.J.)
| | - Ji-Youn Yeo
- From the Microbiome Consortium, Center for Hypertension and Precision Medicine, University of Toledo College of Medicine and Life Sciences, Toledo, OH; and Department of Physiology and Pharmacology, University of Toledo College of Medicine and Life Sciences, Toledo, OH (S.J., J.M., X.C., S.G., A.H., P.S., B.S.Y., B.M., J.-Y.Y., M.V-K., T.Y., B.J.)
| | - Matam Vijay-Kumar
- From the Microbiome Consortium, Center for Hypertension and Precision Medicine, University of Toledo College of Medicine and Life Sciences, Toledo, OH; and Department of Physiology and Pharmacology, University of Toledo College of Medicine and Life Sciences, Toledo, OH (S.J., J.M., X.C., S.G., A.H., P.S., B.S.Y., B.M., J.-Y.Y., M.V-K., T.Y., B.J.)
| | - Tao Yang
- From the Microbiome Consortium, Center for Hypertension and Precision Medicine, University of Toledo College of Medicine and Life Sciences, Toledo, OH; and Department of Physiology and Pharmacology, University of Toledo College of Medicine and Life Sciences, Toledo, OH (S.J., J.M., X.C., S.G., A.H., P.S., B.S.Y., B.M., J.-Y.Y., M.V-K., T.Y., B.J.)
| | - Bina Joe
- From the Microbiome Consortium, Center for Hypertension and Precision Medicine, University of Toledo College of Medicine and Life Sciences, Toledo, OH; and Department of Physiology and Pharmacology, University of Toledo College of Medicine and Life Sciences, Toledo, OH (S.J., J.M., X.C., S.G., A.H., P.S., B.S.Y., B.M., J.-Y.Y., M.V-K., T.Y., B.J.)
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21
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Refinetti R. Circadian rhythmicity of body temperature and metabolism. Temperature (Austin) 2020; 7:321-362. [PMID: 33251281 PMCID: PMC7678948 DOI: 10.1080/23328940.2020.1743605] [Citation(s) in RCA: 44] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2020] [Revised: 03/11/2020] [Accepted: 03/12/2020] [Indexed: 12/19/2022] Open
Abstract
This article reviews the literature on the circadian rhythms of body temperature and whole-organism metabolism. The two rhythms are first described separately, each description preceded by a review of research methods. Both rhythms are generated endogenously but can be affected by exogenous factors. The relationship between the two rhythms is discussed next. In endothermic animals, modulation of metabolic activity can affect body temperature, but the rhythm of body temperature is not a mere side effect of the rhythm of metabolic thermogenesis associated with general activity. The circadian system modulates metabolic heat production to generate the body temperature rhythm, which challenges homeothermy but does not abolish it. Individual cells do not regulate their own temperature, but the relationship between circadian rhythms and metabolism at the cellular level is also discussed. Metabolism is both an output of and an input to the circadian clock, meaning that circadian rhythmicity and metabolism are intertwined in the cell.
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Affiliation(s)
- Roberto Refinetti
- Department of Psychology, University of New Orleans, New Orleans, LA, USA
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22
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Gubin DG, Malishevskaya ТN, Astakhov YS, Astakhov SY, Cornelissen G, Kuznetsov VA, Weinert D. Progressive retinal ganglion cell loss in primary open-angle glaucoma is associated with temperature circadian rhythm phase delay and compromised sleep. Chronobiol Int 2019; 36:564-577. [PMID: 30663431 DOI: 10.1080/07420528.2019.1566741] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Advanced primary open-angle glaucoma (POAG) is characterized by progressive retinal ganglion cell complex (RGCC) damage that may cause subsequent disruption of the circadian rhythms. Therefore, we evaluated circadian body temperature (BT) rhythm and sleep characteristics of 115 individuals (38 men and 77 women) diagnosed with POAG. GLV (global loss volume; %), a measure of RGCC damage, was estimated by high-definition optical coherence tomography, and RGC functional ability was assessed by pattern electroretinogram amplitude (PERGA). Depending on dynamics of POAG progression criteria, two groups were formed that were distinctively different in GLV: Stable POAG group (S-POAG; GLV = 5.95 ± 1.84, n = 65) and Progressive POAG group (P-POAG; GLV = 24.27 ± 5.09, n = 50). S-POAG and P-POAG groups were not different in mean age (67.61 ± 7.56 versus 69.98 ± 8.15) or body mass index (24.66 ± 3.03 versus 24.77 ± 2.90). All subjects performed 21 around-the-clock BT self-measurements during a 72-h period and kept activity/sleep diaries. Results showed pronounced disruption of circadian physiology in POAG and its progression with increasing severity of the disease. The daily mean of BT was unusually low, compared to age-matched controls. Moreover, our results revealed distinctive features of BT circadian rhythm alterations in POAG development and POAG progression. S-POAG is associated with lowered BT circadian rhythm robustness and inter-daily phase stability compared to controls. In the P-POAG group, the mean phase of the circadian BT rhythm was delayed by about 5 h and phases were highly scattered among individual patients, which led to reduced group mean amplitude. Circadian amplitudes of individuals were not different between the groups. Altogether, these results suggest that the body clock still works in POAG patients, but its entrainment to the 24-h environment is compromised. Probably because of the internal desynchronization, bedtime is delayed, and sleep duration is accordingly shortened by about 55 min in P-POAG compared to S-POAG patients. In the entire POAG cohort (both groups), later sleep phase and shorter mean sleep duration correlate with the delayed BT phase (r = 0.215; p = 0.021 and r = 0.322; p = 0.0004, respectively). An RGCC GLV of 15% apparently constitutes a threshold above which a delay of the circadian BT rhythm and a shortening of sleep duration occur.
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Affiliation(s)
- D G Gubin
- a Department of Biology , Medical University , Tyumen , Russia.,b Tyumen Cardiology Research Center , Tomsk National Research Medical Center, Russian Academy of Science , Tomsk , Russia
| | - Т N Malishevskaya
- c Department of Organization of Medical Care , State Autonomous Health Care Institution Tyumen Regional Ophthalmological Dispensary , Tyumen , Russia.,d Department of Ophthalmology and Optometry , West-Siberian Institute of Postgraduate Medical Education , Tyumen , Russia
| | - Y S Astakhov
- e Department of Ophthalmology , Pavlov First Saint Petersburg State Medical University , St. Petersburg , Russia
| | - S Y Astakhov
- e Department of Ophthalmology , Pavlov First Saint Petersburg State Medical University , St. Petersburg , Russia
| | - G Cornelissen
- f Halberg Chronobiology Center , University of Minnesota , Minneapolis , MN , USA
| | - V A Kuznetsov
- b Tyumen Cardiology Research Center , Tomsk National Research Medical Center, Russian Academy of Science , Tomsk , Russia
| | - D Weinert
- g Institute of Biology/Zoology , Martin Luther University , Halle-Wittenberg , Germany
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23
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Gubin D, Weinert D, Solovieva SV, Durov AM, Litvinova NS, Danilova LA, Prokopiev NY, Trushnikov DY, Kartashova EA. Melatonin attenuates light-at-night effects on systolic blood pressure and body temperature but does not affect diastolic blood pressure and heart rate circadian rhythms. BIOL RHYTHM RES 2019. [DOI: 10.1080/09291016.2018.1564586] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Affiliation(s)
- Denis Gubin
- Department of Biology, Tyumen Medical University, Tyumen, Russia
- Tyumen Cardiology Research Center, Tomsk National Research Medical Center, Russian Academy of Science, Tomsk, Russia
| | - D. Weinert
- Institute of Biology/Zoology, Martin Luther University, Halle-Wittenberg, Germany
| | - S. V. Solovieva
- Department of Biology, Tyumen Medical University, Tyumen, Russia
| | - A. M. Durov
- Department of Biology, Tyumen Medical University, Tyumen, Russia
- Department of Sport Medicine, Tyumen State University, Tyumen, Russia
| | - N. S. Litvinova
- Department of Biology, Tyumen Medical University, Tyumen, Russia
| | - L. A. Danilova
- Department of Biology, Tyumen Medical University, Tyumen, Russia
| | - N. Y. Prokopiev
- Institute of Biology/Zoology, Martin Luther University, Halle-Wittenberg, Germany
| | - D. Y. Trushnikov
- Department of Biology, Tyumen Medical University, Tyumen, Russia
| | - E. A. Kartashova
- Department of Biology, Tyumen Medical University, Tyumen, Russia
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24
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Lembach A, Stahr A, Ali AAH, Ingenwerth M, von Gall C. Sex-Dependent Effects of Bmal1-Deficiency on Mouse Cerebral Cortex Infarction in Response to Photothrombotic Stroke. Int J Mol Sci 2018; 19:E3124. [PMID: 30314381 PMCID: PMC6213371 DOI: 10.3390/ijms19103124] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2018] [Revised: 10/01/2018] [Accepted: 10/03/2018] [Indexed: 12/21/2022] Open
Abstract
Stroke is a leading cause of disability and death worldwide. There is increasing evidence that occurrence of ischemic stroke is affected by circadian system and sex. However, little is known about the effect of these factors on structural recovery after ischemic stroke. Therefore, we studied infarction in cerebral neocortex of male and female mice with deletion of the clock gene Bmal1 (Bmal1-/-) after focal ischemia induced by photothrombosis (PT). The infarct core size was significantly smaller 14 days (d) as compared to seven days after PT, consistent with structural recovery during the sub-acute phase. However, when sexes were analyzed separately 14 days after PT, infarct core was significantly larger in wild-type (Bmal1+/+) female as compared to male Bmal1+/+ mice, and in female Bmal1+/+, as compared to female Bmal1-/- mice. Volumes of reactive astrogliosis and densely packed microglia closely mirrored the size of infarct core in respective groups. Estradiol levels were significantly higher in female Bmal1-/- as compared to Bmal1+/+ mice. Our data suggests a sex-dependent effect and an interaction between sex and genotype on infarct size, the recruitment of astrocytes and microglia, and a relationship of these cells with structural recovery probably due to positive effects of estradiol during the subacute phase.
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Affiliation(s)
- Anne Lembach
- Institute of Anatomy II, Medical Faculty, Heinrich-Heine-University, Merowinger Platz 1A, 40225 Düsseldorf, Germany.
| | - Anna Stahr
- Institute of Anatomy II, Medical Faculty, Heinrich-Heine-University, Merowinger Platz 1A, 40225 Düsseldorf, Germany.
| | - Amira A H Ali
- Institute of Anatomy II, Medical Faculty, Heinrich-Heine-University, Merowinger Platz 1A, 40225 Düsseldorf, Germany.
| | - Marc Ingenwerth
- Institute of Anatomy II, Medical Faculty, Heinrich-Heine-University, Merowinger Platz 1A, 40225 Düsseldorf, Germany.
- Institute for Pathology, University Hospital Essen, Hufelandstraße 55, 45147 Essen, Germany.
| | - Charlotte von Gall
- Institute of Anatomy II, Medical Faculty, Heinrich-Heine-University, Merowinger Platz 1A, 40225 Düsseldorf, Germany.
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Zakari FO, Ayo JO, Rekwot PI, Kawu MU, Minka NS. Diurnal rhythms of heart and respiratory rates in donkeys of different age groups during the cold-dry and hot-dry seasons in a tropical savannah. Physiol Rep 2018; 6:e13855. [PMID: 30187687 PMCID: PMC6125241 DOI: 10.14814/phy2.13855] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2018] [Revised: 08/02/2018] [Accepted: 08/09/2018] [Indexed: 12/05/2022] Open
Abstract
The aim of this study was to determine the effect of season on diurnal rhythms of heart (HR) and respiratory rates (RespR) in the adult, yearling, and foal donkeys during the cold-dry and hot-dry seasons under natural light/dark cycle. The resting HR and RespR were recorded bihourly for 24 consecutive hours from 06:00 to 06:00 h (GMT +1) in 30, clinically healthy donkeys (10 adults,10 yearlings, and 10 foals). Dry-bulb temperature (DBT), relative humidity (RH), temperature-humidity index (THI) and wet-bulb globe temperature index (WBGT) inside the pen were recorded bihourly from 06:00 to 06:00 h. Values of DBT, THI, and WBGT obtained during the hot-dry season were significantly (P < 0.05) higher than corresponding values recorded during the cold-dry season. Application of single-cosinor procedure showed that HR and RespR exhibited daily rhythmicity in both seasons. The mesors of the HR in adult (41.51 ± 0.34 beats/min [bpm]), yearling (40.80 ± 0.43 bpm), and foal (47.55 ± 0.40 bpm) donkeys during the cold-dry season were significantly (P < 0.01) lower, compared to the corresponding values of 48.4 ± 0.40 bpm, 50.42 ± 0.52 bpm and 58.10 ± 0.50 bpm, respectively during the hot-dry season. The mesors of RespR in adult, yearling, and foal donkeys during the hot-dry season were higher (P < 0.05), when compared to the corresponding values recorded in the cold-dry season. The HR and RespR of foals were significantly (P < 0.05) higher than those of the adult and yearling donkeys. Amplitudes of HR and RespR were higher during the hot-dry season than the cold-dry season. In conclusion, seasonal changes affect diurnal rhythmicity of HR and RespR of adult, yearling, and foal donkeys during the cold-dry and hot-dry seasons. The HR and RespR of donkeys vary with age, with higher values in the foals than the adult and yearling donkeys in both seasons.
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Affiliation(s)
- Friday O. Zakari
- Department of Veterinary PhysiologyFaculty of Veterinary MedicineAhmadu Bello UniversityZariaNigeria
| | - Joseph O. Ayo
- Department of Veterinary PhysiologyFaculty of Veterinary MedicineAhmadu Bello UniversityZariaNigeria
| | - Peter I. Rekwot
- National Animal Production Research InstituteShika‐ZariaNigeria
| | - Muhammed U. Kawu
- Department of Veterinary PhysiologyFaculty of Veterinary MedicineAhmadu Bello UniversityZariaNigeria
| | - Ndazo S. Minka
- Division of Agricultural CollegesCollege of Agriculture and Animal ScienceAhmadu Bello UniversityMando‐KadunaNigeria
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26
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Qin T, Lu XT, Li YG, Liu Y, Yan W, Li N, Sun YY. Effect of Period 2 on the proliferation, apoptosis and migration of osteosarcoma cells, and the corresponding mechanisms. Oncol Lett 2018; 16:2668-2674. [PMID: 30013663 DOI: 10.3892/ol.2018.8952] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2017] [Accepted: 04/30/2018] [Indexed: 12/18/2022] Open
Abstract
Period 2 (per2) is a core circadian clock gene. Dysregulation of the per2 gene has been identified in a number of types of human cancer and may be associated with a poor prognosis. To confirm the influence of per2 gene on MNNG/HOS human osteosarcoma cells, small interfering (si)RNA against per2 or plasmids containing per2 were transfected into MNNG/HOS cells, and the proliferation, apoptosis and migration were observed. The present study demonstrated that per2 knockdown significantly enhanced MNNG/HOS cell proliferation and migration and protected MNNG/HOS cells from apoptosis. Per2 overexpression inhibited MNNG/HOS cell proliferation and migration and promoted apoptosis. Furthermore, the protein expression of phosphorylated (p)-protein kinase B (Akt) and Bcl-2 were inhibited in per2-overexpressing cells, while the expression of p27, p21 and cleaved caspase-3 was promoted. In contrast, the expression of p-Akt and Bcl-2 was promoted in per2-knockdown cells, and p27, p21 and cleaved caspase-3 were decreased. This initial study may provide an alternative therapeutic strategy for the treatment of osteosarcoma.
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Affiliation(s)
- Tao Qin
- Department of Emergency Surgery, Qilu Hospital of Shandong University, Jinan, Shandong 250000, P.R. China
| | - Xiao-Ting Lu
- Key Laboratory of Cardiovascular Remodeling and Function Research, Chinese Ministry of Education, Chinese National Health Commission and Chinese Academy of Medical Sciences, The State and Shandong Province Joint Key Laboratory of Translational Cardiovascular Medicine, Department of Cardiology, Qilu Hospital of Shandong University, Jinan, Shandong 250000, P.R. China
| | - Yong-Gang Li
- Department of Emergency Surgery, Qilu Hospital of Shandong University, Jinan, Shandong 250000, P.R. China
| | - Yan Liu
- Key Laboratory of Cardiovascular Remodeling and Function Research, Chinese Ministry of Education, Chinese National Health Commission and Chinese Academy of Medical Sciences, The State and Shandong Province Joint Key Laboratory of Translational Cardiovascular Medicine, Department of Cardiology, Qilu Hospital of Shandong University, Jinan, Shandong 250000, P.R. China
| | - Wenjiang Yan
- Key Laboratory of Cardiovascular Remodeling and Function Research, Chinese Ministry of Education, Chinese National Health Commission and Chinese Academy of Medical Sciences, The State and Shandong Province Joint Key Laboratory of Translational Cardiovascular Medicine, Department of Cardiology, Qilu Hospital of Shandong University, Jinan, Shandong 250000, P.R. China
| | - Na Li
- Key Laboratory of Cardiovascular Remodeling and Function Research, Chinese Ministry of Education, Chinese National Health Commission and Chinese Academy of Medical Sciences, The State and Shandong Province Joint Key Laboratory of Translational Cardiovascular Medicine, Department of Cardiology, Qilu Hospital of Shandong University, Jinan, Shandong 250000, P.R. China
| | - Yuan-Yuan Sun
- Key Laboratory of Cardiovascular Remodeling and Function Research, Chinese Ministry of Education, Chinese National Health Commission and Chinese Academy of Medical Sciences, The State and Shandong Province Joint Key Laboratory of Translational Cardiovascular Medicine, Department of Cardiology, Qilu Hospital of Shandong University, Jinan, Shandong 250000, P.R. China
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27
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Abstract
ECTemp™ is a heart rate (HR)-based core temperature (CT) estimation algorithm mainly used as a real-time thermal-work strain indicator in military populations. ECTemp™ may also be valuable for resting CT estimation, which is critical for circadian rhythm research. This investigation developed and incorporated a sigmoid equation into ECTemp™ to better estimate resting CT. HR and CT data were collected over two calorimeter test trials from 16 volunteers (age, 23 ± 3 yrs; height, 1.72 ± 0.07 m; body mass, 68.5 ± 8.1 kg) during periods of sleep and inactivity. Half of the test trials were combined with ECTemp™’s original development dataset to train the new sigmoid model while the other was used for model validation. Models were compared by their estimation accuracy and precision. While both models produced accurate CT estimates, the sigmoid model had a smaller bias (−0.04 ± 0.26°C vs. −0.19 ± 0.29°C) and root mean square error (RMSE; 0.26°C vs. 0.35°C). ECTemp™ is a validated HR-based resting CT estimation algorithm. The new sigmoid equation corrects lower CT estimates while producing nearly identical estimates to the original quadratic equation at higher CT. The demonstrated accuracy of ECTemp™ encourages future research to explore the algorithm’s potential as a non-invasive means of tracking CT circadian rhythms.
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28
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Grant MC, Glen J. An investigation into sleep patterns and the effect of time of day on performance in youth swimmers. BIOL RHYTHM RES 2018. [DOI: 10.1080/09291016.2018.1424774] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- Marie Clare Grant
- Division of Sport and Exercise Sciences, Abertay University, Dundee, UK
| | - Jonathan Glen
- Dundee Academy of Sport, Abertay University, Dundee, UK
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