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https://www.readbyqxmd.com/read/29349282/does-non-standard-work-mean-non-standard-health-exploring-links-between-non-standard-work-schedules-health-behavior-and-well-being
#1
Megan R Winkler, Susan Mason, Melissa N Laska, Mary J Christoph, Dianne Neumark-Sztainer
The last century has seen dramatic shifts in population work circumstances, leading to an increasing normalization of non-standard work schedules (NSWSs), defined as non-daytime, irregular hours. An ever-growing body of evidence links NSWSs to a host of non-communicable chronic conditions; yet, these associations primarily concentrate on the physiologic mechanisms created by circadian disruption and insufficient sleep. While important, not all NSWSs create such chronobiologic disruption, and other aspects of working time and synchronization could be important to the relationships between work schedules and chronic disease...
April 2018: SSM—Population Health
https://www.readbyqxmd.com/read/29297397/time-sensitive-therapeutics
#2
REVIEW
John J Marini
Much of what we now do in Critical Care carries an air of urgency, a pressing need to discover and act, with priorities biased toward a reactive response. However, efficacy often depends not simply upon what we do, but rather on whether, when, and how persistently we intervene. The practice of medicine is based upon diagnosis, integration of multiple sources of information, keen judgment, and appropriate intervention. Timing may not be everything, as the well-known adage suggests, but in the intensive care unit (ICU) timing issues clearly deserve more attention than they are currently given...
December 28, 2017: Critical Care: the Official Journal of the Critical Care Forum
https://www.readbyqxmd.com/read/29289962/treatment-guidelines-for-circadian-rhythm-sleep-wake-disorders-of-the-polish-sleep-research-society-and-the-section-of-biological-psychiatry-of-the-polish-psychiatric-association-part-i-physiology-assessment-and-therapeutic-methods
#3
REVIEW
Adam Wichniak, Konrad S Jankowski, Michal Skalski, Krystyna Skwarło-Sońta, Jolanta B Zawilska, Marcin Żarowski, Ewa Poradowska, Wojciech Jernajczyk
Majority of the physiological processes in the human organism are rhythmic. The most common are the diurnal changes that repeat roughly every 24 hours, called circadian rhythms. Circadian rhythms disorders have negative influence on human functioning. The aim of this article is to present the current understanding of the circadian rhythms physiological role, with particular emphasis on the circadian rhythm sleep-wake disorders (CRSWD), principles of their diagnosis and chronobiological therapy. The guidelines are based on the review of recommendations from the scientific societies involved in sleep medicine and the clinical experiences of the authors...
October 29, 2017: Psychiatria Polska
https://www.readbyqxmd.com/read/29282999/the-concept-of-chronotypes-and-its-clinical-importance-for-depressive-disorders
#4
Matthias J Müller, Anja Haag
Chronobiology and chronobiological research deal with time-dependent physiological processes and behavioral correlates as well as their adaptation to environmental conditions. Chronobiological research is presently focused on the impact of circadian rhythms on human behavior. In the last three decades, chronobiology has established itself as an independent area of research evolving to an important field of clinical psychology and psychiatry. In this overview, the results of studies on the clinical importance of chronotypes are summarized...
January 1, 2017: International Journal of Psychiatry in Medicine
https://www.readbyqxmd.com/read/29278312/chronobiological-research-for-cognitive-science-a-multifaceted-view
#5
EDITORIAL
Christina Schmidt, Yan Bao
No abstract text is available yet for this article.
December 2017: PsyCh Journal
https://www.readbyqxmd.com/read/29277444/entrainment-of-the-mouse-circadian-clock-effects-of-stress-exercise-and-nutrition
#6
REVIEW
Yu Tahara, Shigenobu Shibata
The circadian clock system in mammals plays a fundamental role in maintaining homeostasis. Entrainment is an important characteristic of the internal clock, by which appropriate timing is maintained according to external daily stimuli, such as light, stress, exercise, and/or food. Disorganized entrainment or a misaligned clock time, such as jet lag, increases health disturbances. The central clock in the suprachiasmatic nuclei, located in the hypothalamus, receives information about arousal stimuli, such as physical stress or exercise, and changes the clock time by modifying neural activity or the expression of circadian clock genes...
December 22, 2017: Free Radical Biology & Medicine
https://www.readbyqxmd.com/read/29249587/correlations-of-serum-cyclophilin-a-and-melatonin-concentrations-with-hypertension-induced-left-ventricular-hypertrophy
#7
Hongyan Su, Tongshuai Chen, Jingyuan Li, Jie Xiao, Shujian Wang, Xiaobin Guo, Peili Bu
BACKGROUND AND AIMS: Cyclophilin A (CyPA) is an abundantly expressed pro-inflammatory cytokine and a major secreted oxidative stress-induced factor (SOXF). Melatonin is an important chronobiological regulatory molecule that is mainly released from the pineal gland and exerts antioxidant effects by acting as a radical scavenger. Based on accumulating evidence, both CyPA and melatonin play important roles in cardiovascular diseases. However, further investigations are required to determine whether CyPA and melatonin are associated with hypertension-induced left ventricular hypertrophy (LVH)...
December 14, 2017: Archives of Medical Research
https://www.readbyqxmd.com/read/29231753/rates-of-insufficiency-and-deficiency-of-vitamin-d-levels-in-elite-professional-male-and-female-skiers-a-chronobiologic-approach
#8
Jacopo Antonino Vitale, Giovanni Lombardi, Luca Cavaleri, Rosa Graziani, Herbert Schoenhuber, Antonio La Torre, Giuseppe Banfi
Vitamin D is essential for the maintenance and promotion of musculoskeletal health, for the functioning of the immune, cardiovascular and reproductive systems, and its main action is to keep calcium and phosphate plasmatic physiological concentrations at intestinal, renal and bony level. Vitamin D affects several parameters related to physical performance too and a particularly high percentage of vitamin D insufficiency and deficiency in professional athletes has been observed. Several variables are able to impair the synthesis of 25(OH)D in athletes, specifically both genetic and environmental factors, but the most probable explanation for the deficient/insufficient vitamin D levels is the insufficient ultraviolet B light (UVB) exposure during winter...
December 12, 2017: Chronobiology International
https://www.readbyqxmd.com/read/29219623/usual-normalization-strategies-for-gene-expression-studies-impair-the-detection-and-analysis-of-circadian-patterns
#9
Diego de Siqueira Figueredo, Mayara Rodrigues Barbosa, Daniel Gomes Coimbra, José Luiz Araújo Dos Santos, Ellyda Fernanda Lopes Costa, Bruna Del Vechio Koike, Magna Suzana Alexandre Moreira, Tiago Gomes de Andrade
Recent studies have shown that transcriptomes from different tissues present circadian oscillations. Therefore, the endogenous variation of total RNA should be considered as a potential bias in circadian studies of gene expression. However, normalization strategies generally include the equalization of total RNA concentration between samples prior to cDNA synthesis. Moreover, endogenous housekeeping genes (HKGs) frequently used for data normalization may exhibit circadian variation and distort experimental results if not detected or considered...
December 8, 2017: Chronobiology International
https://www.readbyqxmd.com/read/29195759/circadian-regulation-of-glucose-lipid-and-energy-metabolism-in-humans
#10
Eleonora Poggiogalle, Humaira Jamshed, Courtney M Peterson
The circadian system orchestrates metabolism in daily 24-hour cycles. Such rhythms organize metabolism by temporally separating opposing metabolic processes and by anticipating recurring feeding-fasting cycles to increase metabolic efficiency. Although animal studies demonstrate that the circadian system plays a pervasive role in regulating metabolism, it is unclear how, and to what degree, circadian research in rodents translates into humans. Here, we review evidence that the circadian system regulates glucose, lipid, and energy metabolism in humans...
November 28, 2017: Metabolism: Clinical and Experimental
https://www.readbyqxmd.com/read/29185170/influence-of-time-of-day-on-joint-navon-effect
#11
Marco Fabbri, Matteo Frisoni, Monica Martoni, Lorenzo Tonetti, Vincenzo Natale
The shared attention theory suggests that people devote greater cognitive resources to those features co-attended simultaneously with others, determining better performance in several types of tasks. When co-actors performed a go/no-go Navon task attending different features of target letters, the performance was impaired, reflecting a joint Navon effect (the representation of a co-actor's attentional focus made it more difficult to select and apply one's own focus of attention), probably due to asynchronous co-attention with a decrease in cognitive resources involved...
November 28, 2017: Cognitive Processing
https://www.readbyqxmd.com/read/29149647/dietary-fish-oil-differentially-ameliorates-high-fructose-diet-induced-hepatic-steatosis-and-hyperlipidemia-in-mice-depending-on-time-of-feeding
#12
Katsutaka Oishi, Tatsuya Konishi, Chiaki Hashimoto, Saori Yamamoto, Yoshinori Takahashi, Yasuhiko Shiina
Chrononutrition is the science of nutrition based on chronobiology. Numerous epidemiological studies have shown that fish oil (FO) reduces the risk of cardiovascular events through various actions such as lowering triglycerides. The present study aimed to determine the time of day when the hypertriglyceridemia-decreasing ability of FO is optimal in mice. A high-fructose diet (HFrD) that induces hyperlipidemia in mice was replaced with the same diet containing 4% FO (HFrD-4% FO) at different times of the day for 2 weeks as described below...
October 12, 2017: Journal of Nutritional Biochemistry
https://www.readbyqxmd.com/read/29145721/meta-analysis-of-day-of-week-variation-of-acute-aortic-rupture-or-dissection
#13
Hisato Takagi, Tomo Ando, Shohei Mitta, Takuya Umemoto
BACKGROUND: We performed a meta-analysis to assess the presence of a day-of-week rhythmic variability of acute aortic rupture or dissection (AARD) onset. METHODS: Eligible studies were observational studies enrolling patients with AARD and reporting day-of-week variation of AARD. Study-specific estimates, i.e. day-of-week incidence of AARD, were combined using the random-effects model. Chronobiological analysis was performed by applying a partial Fourier series to pooled day-of-week incidence by using the inverse-variance weighted least-squares method...
November 16, 2017: Journal of Cardiovascular Surgery
https://www.readbyqxmd.com/read/29106303/dynamics-of-core-body-temperature-cycles-in-long-term-measurements-under-real-life-conditions-in-women
#14
D Ekhart, H Wicht, T Kersken, H Ackermann, M Kaczmarczyk, G Pretzsch, H Alexander, H W Korf
Studies under real life conditions become more and more relevant in chronobiological and chronomedical research. The present study aims to analyze one of the most prominent biological rhythms: the core body temperature (CBT) rhythm in the real world outside the laboratory. CBT was recorded continuously in 37 healthy women (age between 21 and 44 years, median 29 years) with a newly developed intravaginal temperature sensor for up to 102 days. Sleep logs were available from 23 participants. To quantify the daily dynamics of each individual CBT-curve, novel measurement parameters are introduced which permit the quantification of the phase and shape of the CBT rhythms as well as their relation to the sleep-wake cycle...
November 6, 2017: Chronobiology International
https://www.readbyqxmd.com/read/29097992/circadian-and-metabolic-effects-of-light-implications-in-weight-homeostasis-and-health
#15
REVIEW
Santiago A Plano, Leandro P Casiraghi, Paula García Moro, Natalia Paladino, Diego A Golombek, Juan J Chiesa
Daily interactions between the hypothalamic circadian clock at the suprachiasmatic nucleus (SCN) and peripheral circadian oscillators regulate physiology and metabolism to set temporal variations in homeostatic regulation. Phase coherence of these circadian oscillators is achieved by the entrainment of the SCN to the environmental 24-h light:dark (LD) cycle, coupled through downstream neural, neuroendocrine, and autonomic outputs. The SCN coordinate activity and feeding rhythms, thus setting the timing of food intake, energy expenditure, thermogenesis, and active and basal metabolism...
2017: Frontiers in Neurology
https://www.readbyqxmd.com/read/29072179/the-role-of-chronobiology-as-transdisciplinary-field-of-research-application-to-psychiatry
#16
Okan Çalıyurt
Chronobiology is a field that studies the effects of time on biological systems. Periodicity is of particular interest. The master biological clock in the suprachiasmatic nucleus controls daily rhythms of core body temperature, rest-activity cycle, physiological and behavioral functions, psychomotor functions and mood in humans. The clock genes are involved in the generation of the circadian rhythms and the biological clock is synchronized to solar day by direct photic inputs. Various circadian rhythm abnormalities have been demonstrated in mood disorders such as unipolar depression, bipolar depression and seasonal affective disorder...
October 26, 2017: Balkan Medical Journal
https://www.readbyqxmd.com/read/29070429/decrease-in-chronobiological-adaptability
#17
Jürgen Bickhardt
No abstract text is available yet for this article.
October 6, 2017: Deutsches Ärzteblatt International
https://www.readbyqxmd.com/read/29069527/chronobiology-comes-of-age
#18
EDITORIAL
A Wirz-Justice
No abstract text is available yet for this article.
December 2017: Acta Psychiatrica Scandinavica
https://www.readbyqxmd.com/read/29066952/the-sleep-wake-cycle-in-the-nicotinic-alpha-9-acetylcholine-receptor-subunit-knock-out-mice
#19
Natalia Madrid-López, Jorge Estrada, Javier Díaz, Alejandro Bassi, Paul H Délano, Adrián Ocampo-Garcés
There is a neural matrix controlling the sleep-wake cycle (SWC) embedded within high ranking integrative mechanisms in the central nervous system. Nicotinic alpha-9 acetylcholine receptor subunit (alpha-9 nAChR) participate in physiological processes occurring in sensory, endocrine and immune systems. There is a relationship between the SWC architecture, body homeostasis and sensory afferents so that disruption of afferent signaling is expected to affect the temporal organization of sleep and wake states. The analysis of the SWC of 9 nAChR knock-out animals may help to reveal the contribution of alpha-9 nAChR to sleep chronobiological determinants...
2017: Frontiers in Cellular Neuroscience
https://www.readbyqxmd.com/read/29039812/molecular-aspects-of-circadian-pharmacology-and-relevance-for-cancer-chronotherapy
#20
REVIEW
Narin Ozturk, Dilek Ozturk, Ibrahim Halil Kavakli, Alper Okyar
The circadian timing system (CTS) controls various biological functions in mammals including xenobiotic metabolism and detoxification, immune functions, cell cycle events, apoptosis and angiogenesis. Although the importance of the CTS is well known in the pharmacology of drugs, it is less appreciated at the clinical level. Genome-wide studies highlighted that the majority of drug target genes are controlled by CTS. This suggests that chronotherapeutic approaches should be taken for many drugs to enhance their effectiveness...
October 17, 2017: International Journal of Molecular Sciences
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