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Chronobiology International

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https://www.readbyqxmd.com/read/28430534/chronobiological-factors-for-compassion-satisfaction-and-fatigue-among-ambulatory-oncology-caregivers
#1
Daniela Bellicoso, Maureen Trudeau, Margaret I Fitch, Martin R Ralph
Primary caregivers for victims of chronic illness and or trauma experience both positive and negative emotional consequences. These are broadly classified as compassion satisfaction (CS) and compassion fatigue (CF). Because one of the components of CF, burnout, varies with chronotype and sleep quality, we assessed the influence of chronobiological features on the broader constructs of CS and CF. Responses from primary ambulatory care oncology staff working dayshifts were assessed for potential relationships of chronotype and sleep quality with CS and CF using the professional quality of life scale...
April 21, 2017: Chronobiology International
https://www.readbyqxmd.com/read/28430522/impact-of-naturalistic-lighting-on-hospitalized-stroke-patients-in-a-rehabilitation-unit-design-and-measurement
#2
Anders West, Poul Jennum, Sofie Amalie Simonsen, Birgit Sander, Milena Pavlova, Helle K Iversen
INTRODUCTION AND RATIONALE: Stroke is a major cause of acquired cerebral disability among adults, frequently accompanied by depression, anxiety, cognitive impairment, disrupted sleep and fatigue. New ways of intervention to prevent these complications are therefore needed. The major circadian regulator, the suprachiasmatic nucleus, is mainly controlled by natural daylight, and the blue spectrum is considered the most powerful. During stroke rehabilitation, patients typically are mostly indoors and therefore not exposed to the natural daytime variation in light intensity...
April 21, 2017: Chronobiology International
https://www.readbyqxmd.com/read/28430521/perinatal-light-imprinting-of-circadian-clocks-and-systems-pliccs-a-signature-of-photoperiod-around-birth-on-circadian-system-stability-and-association-with-cancer
#3
Philip Lewis, Thomas C Erren
Recent findings from animal models suggest that plasticity of human circadian clocks and systems may be differentially affected by different paradigms of perinatal photoperiod exposure to the detriment of health in later life, including cancer development. Focusing on the example of cancer, we carry out a series of systematic literature reviews concerning perinatal light imprinting of circadian clocks and systems (PLICCS) in animal models, and concerning the risk of cancer development with the primary determinants of the perinatal photoperiod, namely season of birth or latitude of birth...
April 21, 2017: Chronobiology International
https://www.readbyqxmd.com/read/28414547/distribution-of-period-immunoreactive-neurons-and-temporal-change-of-the-immunoreactivity-under-long-day-and-short-day-conditions-in-the-larval-brain-of-the-flesh-fly-sarcophaga-similis
#4
Mizuho Yamamoto, Sakiko Shiga, Shin G Goto
The flesh fly Sarcophaga similis show a clear photoperiodic response; they develop into adults under long days, whereas they arrest their development at the pupal stage under short days. Although the involvement of a circadian clock in photoperiodic time measurement is suggested in this species, the anatomical location of the clock neurons responsible for the time measurement has been unknown. We detected two PERIOD-immunoreactive cell clusters in the larval brain; one cluster was located at the dorsoanterior region and the other at the medial region...
April 17, 2017: Chronobiology International
https://www.readbyqxmd.com/read/28409690/salivary-cortisol-concentration-after-high-intensity-interval-exercise-time-of-day-and-chronotype-effect
#5
Matteo Bonato, Antonio La Torre, Marina Saresella, Ivana Marventano, Giampiero Merati, Jacopo Antonino Vitale
Due to personal and working necessities, the time for exercise is often short, and scheduled early in the morning or late in the afternoon. Cortisol plays a central role in the physiological and behavioral response to a physical challenge and can be considered as an index of exercise stress. Therefore, the aim of this study was to evaluate the influence of the circadian phenotype classification on salivary cortisol concentration in relation to an acute session of high-intensity interval exercise (HIIE) performed at different times of the day...
April 14, 2017: Chronobiology International
https://www.readbyqxmd.com/read/28409677/circadian-pattern-of-motor-activity-in-adults-with-attention-deficit-hyperactivity-disorder
#6
Lorenzo Tonetti, Andreas Conca, Giancarlo Giupponi, Vincenzo Natale
This study aims to describe the 24-hour activity rhythm in adults with attention-deficit/hyperactivity disorder (ADHD). A total of 18 ADHD patients and 37 healthy controls (HCs) wore an actigraph for 7 days. ADHD patients showed higher motor activity than HCs at 4:00, 6:00, 15:00 and 16:00 hour. Within the theoretical framework of the two-process model of sleep regulation, the observed data may be explained by lower homeostatic sleep pressure in ADHD. This could lead to an increase in motor activity in the second half of the night, when sleep need decreases more rapidly, and in the first half of the afternoon, when patients do not experience the typical post-lunch dip...
April 14, 2017: Chronobiology International
https://www.readbyqxmd.com/read/28267366/eveningness-associates-with-smoking-and-sleep-problems-among-pregnant-women
#7
Ilona Merikanto, E Juulia Paavonen, Outi Saarenpää-Heikkilä, Tiina Paunio, Timo Partonen
Sleep problems during pregnancy impair maternal health and increase the risk for adverse pregnancy outcome. The circadian preference toward eveningness has been associated with sleep problems in previous studies. Here, we studied whether evening-type women had more sleep problems during their pregnancy, as compared with other chronotypes, in a sample consisting of 1653 pregnant women from the Finnish CHILD-SLEEP Birth Cohort. Chronotype was assessed with a shortened version of the morningness-eveningness questionnaire...
March 7, 2017: Chronobiology International
https://www.readbyqxmd.com/read/28267364/sudden-death-circadian-rhythm-in-chagasic-patients-compared-to-non-chagasic-patients
#8
Juan Marques, Iván Mendoza, Claudia Suárez, Federico Moleiro, Iván Mendoza-Britto, Maria Marques-Mejías
Chagas disease (Ch) affects 8-10 million people in Latin America, most of them are poor. Sudden death (SD) is the major cause of death in patients with Ch. To the best of our knowledge, the present report covers the largest reported series comparing the SD of Ch versus non-Ch patients Objective: To compare the circadian rhythm of SD in Ch versus non-Ch patients. METHODS: Retrospective analysis of all the cases of SD recorded in our department, including autopsied patients from 1963 until 2011...
March 7, 2017: Chronobiology International
https://www.readbyqxmd.com/read/28276850/associations-between-period-3-gene-polymorphisms-and-sleep-chronotype-related-variables-in-patients-with-late-life-insomnia
#9
Hader A Mansour, Joel Wood, Kodavali V Chowdari, Divya Tumuluru, Mikhil Bamne, Timothy H Monk, Martica H Hall, Daniel J Buysse, Vishwajit L Nimgaonkar
A variable number tandem repeat polymorphism (VNTR) in the period 3 (PER3) gene has been associated with heritable sleep and circadian variables, including self-rated chronotypes, polysomnographic (PSG) variables, insomnia and circadian sleep-wake disorders. This report describes novel molecular and clinical analyses of PER3 VNTR polymorphisms to better define their functional consequences. As the PER3 VNTR is located in the exonic (protein coding) region of PER3, we initially investigated whether both alleles (variants) are transcribed into messenger RNA in human fibroblasts...
February 27, 2017: Chronobiology International
https://www.readbyqxmd.com/read/28276851/predicting-the-actigraphy-based-acrophase-using-the-morningness-eveningness-questionnaire-meq-in-college-students-of-north-italy
#10
Eliana Roveda, Jacopo Vitale, Angela Montaruli, Letizia Galasso, Franca Carandente, Andrea Caumo
Actigraphy is the reference objective method to measure circadian rhythmicity. One simpler subjective approach to assess the circadian typology is the Morningness-Eveningness Questionnaire (MEQ) by Horne and Ostberg. In this study, we compared the MEQ score against the actigraphy-based circadian parameters MESOR, amplitude and acrophase in a sample of 54 students of the University of Milan in Northern Italy. MEQ and the acrophase resulted strongly and inversely associated (r = -0.84, p < 0.0001), and their relationship exhibited a clear-cut linear trend...
February 21, 2017: Chronobiology International
https://www.readbyqxmd.com/read/28276854/activity-sleep-and-ambient-light-have-a-different-impact-on-circadian-blood-pressure-heart-rate-and-body-temperature-rhythms
#11
D G Gubin, D Weinert, S V Rybina, L A Danilova, S V Solovieva, A M Durov, N Y Prokopiev, P A Ushakov
The aim of the present study was to investigate the impact of endogenous and exogenous factors for the expression of the daily rhythms of body temperature (BT), blood pressure (BP) and heart rate (HR). One hundred and seventy-three young adults (YA), 17-24 years old (y.o.), of both genders were studied under a modified constant-routine (CR) protocol for 26 h. Participants were assigned randomly to groups with different lighting regimens: CR-LD, n = 77, lights (>400 l×) on from 09:00 to 17:00 h and off (<10 l×) from 17:00 to 09:00 next morning; CR-LL, n = 81, lights on (>400 l×) during the whole experimental session; CR-DD, n = 15, constant dim light (<10 l×) during the whole experiment...
February 16, 2017: Chronobiology International
https://www.readbyqxmd.com/read/28276853/worsening-of-rest-activity-circadian-rhythm-and-quality-of-life-in-female-breast-cancer-patients-along-progression-of-chemotherapy-cycles
#12
Armiya Sultan, Vivek Choudhary, Arti Parganiha
Chemotherapy and its associated side effects can induce the disruption of circadian rest-activity rhythm and may have negative consequences on health-related quality of life (HRQoL) of cancer patients. In the current study, repeated-measures cross-sectional design was implemented to determine the status of circadian rest-activity rhythm and to assess the HRQoL of newly diagnosed female breast cancer patients those were planned to receive six cycles of chemotherapy. Rest activity and HRQoL were assessed in twenty-five patients during chemotherapy cycles 1st (C1), 3rd (C3), and 6th (C6) immediately after they reported to the outdoor ward of the Regional Cancer Center, Pt...
February 16, 2017: Chronobiology International
https://www.readbyqxmd.com/read/28276852/correlations-between-sleep-patterns-and-cardiovascular-diseases-in-a-chinese-middle-aged-population
#13
Chuangshi Wang, Guang Hao, Jian Bo, Wei Li
Epidemiological and animal studies have suggested an association between habitual sleep patterns and cardiovascular (CV) disease, but the results are still controversial. Therefore, the aims of this study are to investigate the relationships between habitual sleep patterns and CV disease based on Prospective Urban Rural Epidemiology (PURE) China study. PURE China study recruited 46 285 participants, aged 35-70, from 12 provinces and 115 communities in China. Habitual sleep patterns and CV disease were self-reported...
February 16, 2017: Chronobiology International
https://www.readbyqxmd.com/read/28156174/seasonal-variation-in-spontaneous-intracerebral-hemorrhage-in-northern-israel
#14
G Telman, G E Sviri, E Sprecher, Y Amsalem, R Avizov
The incidence of spontaneous intracerebral hemorrhage (sICH) and ischemic stroke vary across seasons. Most studies examining seasonal variation in sICH have been conducted in countries with significant climatic changes across seasons, whereas studies from the Mediterranean region, which has a relatively mild winter, are limited in number and have produced inconsistent results. Further studies from the region are called for, especially from countries where sICH seasonality has not yet been explored. A total of 974 patients with sICH between 1 January 2000 and 31 December 2014 were included in this study...
February 3, 2017: Chronobiology International
https://www.readbyqxmd.com/read/28156172/impact-of-daylight-savings-time-on-spontaneous-pregnancy-loss-in-in-vitro-fertilization-patients
#15
Constance Liu, Joseph A Politch, Evan Cullerton, Kathryn Go, Samuel Pang, Wendy Kuohung
Transition into daylight savings time (DST) has studied negative impacts on health, but little is known regarding impact on fertility. This retrospective cohort study evaluates DST impact on pregnancy and pregnancy loss rates in 1,654 autologous in vitro fertilization cycles (2009 to 2012). Study groups were identified based on the relationship of DST to embryo transfer. Pregnancy rates were similar in Spring and Fall (41.4%, 42.2%). Pregnancy loss rates were also comparable between Spring and Fall (15.5%, 17...
February 3, 2017: Chronobiology International
https://www.readbyqxmd.com/read/28156168/evolution-of-circadian-rhythms-in-drosophila-melanogaster-populations-reared-in-constant-light-and-dark-regimes-for-over-330-generations
#16
Radhika Shindey, Vishwanath Varma, K L Nikhil, Vijay Kumar Sharma
Organisms are believed to have evolved circadian clocks as adaptations to deal with cyclic environmental changes, and therefore it has been hypothesized that evolution in constant environments would lead to regression of such clocks. However, previous studies have yielded mixed results, and evolution of circadian clocks under constant conditions has remained an unsettled topic of debate in circadian biology. In continuation of our previous studies, which reported persistence of circadian rhythms in Drosophila melanogaster populations evolving under constant light, here we intended to examine whether circadian clocks and the associated properties evolve differently under constant light and constant darkness...
February 3, 2017: Chronobiology International
https://www.readbyqxmd.com/read/28156163/post-infarct-sleep-disruption-and-its-relation-to-cardiac-remodeling-in-a-rat-model-of-myocardial-infarction
#17
Marjan Aghajani, Mahdieh Faghihi, Alireza Imani, Mohammad Reza Vaez Mahdavi, Abbas Shakoori, Tayebeh Rastegar, Hoda Parsa, Saman Mehrabi, Fatemeh Moradi, Ehsan Kazemi Moghaddam
Sleep disruption after myocardial infarction (MI) by affecting ubiquitin-proteasome system (UPS) is thought to contribute to myocardial remodeling and progressive worsening of cardiac function. The aim of current study was to test the hypothesis about the increased risk of developing heart failure due to experience of sleep restriction (SR) after MI. Male Wistar rats (n = 40) were randomly assigned to four experimental groups: (1) Sham, (2) MI, (3) MI and SR (MI + SR) (4) Sham and SR (Sham + SR). MI was induced by permanent ligation of left anterior descending coronary artery...
February 3, 2017: Chronobiology International
https://www.readbyqxmd.com/read/28156158/the-transition-from-day-to-night-activity-is-a-risk-factor-for-the-development-of-cns-oxygen-toxicity-in-the-diurnal-fat-sand-rat-psammomys-obesus
#18
Mirit Eynan, Adi Biram, Michael Mullokandov, Noga Kronfeld-Schor, Rotem Paz-Cohen, Dvir Menajem, Yehuda Arieli
Performance and safety are impaired in employees engaged in shift work. Combat divers who use closed-circuit oxygen diving apparatus undergo part of their training during the night hours. The greatest risk involved in diving with such apparatus is the development of central nervous system oxygen toxicity (CNS-OT). We investigated whether the switch from day-to-night activity may be a risk factor for the development of CNS-OT using a diurnal animal model, the fat sand rat (Psammomys obesus). Animals were kept on a 12:12 light-dark schedule (6 a...
February 3, 2017: Chronobiology International
https://www.readbyqxmd.com/read/28426389/melatonin-and-circadian-rhythms-in-autism-case-report
#19
Gabriela Melloni Zuculo, Bruno S B Gonçalves, Clay Brittes, Luiz Menna-Barreto, Luciana Pinato
Among the most co-occurring conditions in autism spectrum disorders (ASD), there are sleep disorders which may exacerbate associated behavioral disorders and lead to intensification of existing autistic symptoms. Several studies investigating the use of melatonin in the treatment of sleep disorders in ASD have shown comparative efficiency in sleep with little or no side effects. Here we report a case of ASD with non-24-hour rhythm and the effect of melatonin in circadian parameters by actigraphy. Visual analysis of the first 10 days recorded and the periodogram suggest that this patient showed a non-24-hour rhythm...
2017: Chronobiology International
https://www.readbyqxmd.com/read/28426388/if-the-morning-evening-questionnaire-meq-is-able-to-predict-the-actigraphy-based-acrophase-how-does-its-reduced-five-item-version-rmeq-perform
#20
Angela Montaruli, Letizia Galasso, Franca Carandente, Jacopo A Vitale, Eliana Roveda, Andrea Caumo
No abstract text is available yet for this article.
2017: Chronobiology International
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