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Chronobiology International

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https://www.readbyqxmd.com/read/28107043/the-impact-of-meal-timing-on-cardiometabolic-syndrome-indicators-in-shift-workers
#1
Hylton E Molzof, Michael D Wirth, James B Burch, Nitin Shivappa, James R Hebert, Russell L Johnson, Karen L Gamble
The aims of this study were to 1) compare the inflammatory potential of night- and day-shift nurses' diets with regard to time of day and work status and 2) explore how the timing of food intake during work and off-work is associated with cardiometabolic syndrome (CMS) risk factors between these two groups. Female nurses (N = 17; 8 day-shift and 9 night-shift) reported food intake over 9 days. On a middle day off of work, metabolic parameters were measured after an overnight fast. Energy/macronutrient intake and inflammatory potential of dietary intake (as assessed via the Dietary Inflammatory Index(TM)) were calculated for nurses' workdays, work nights, off-work days, and off-work nights...
January 20, 2017: Chronobiology International
https://www.readbyqxmd.com/read/28107042/association-between-depressive-symptoms-and-morningness-eveningness-sleep-duration-and-rotating-shift-work-in-japanese-nurses
#2
Fumiharu Togo, Takahiro Yoshizaki, Taiki Komatsu
Higher depressive symptoms have been reported in rotating shift workers compared with day workers. Depressive symptoms in adults who do not engage in night work have also been shown to be associated with chronotype and sleep duration. This study examines associations between depressive symptoms, morningness-eveningness (i.e. the degree to which people prefer to be active in the morning or the evening), sleep duration and rotating shift work. Japanese nurses (1252 day workers and 1780 rotating shift workers, aged 20-59) were studied using a self-administered questionnaire...
January 20, 2017: Chronobiology International
https://www.readbyqxmd.com/read/28107041/sleep-and-optimism-a-longitudinal-study-of-bidirectional-causal-relationship-and-its-mediating-and-moderating-variables-in-a-chinese-student-sample
#3
Esther Yuet Ying Lau, C Harry Hui, Jasmine Lam, Shu-Fai Cheung
While both sleep and optimism have been found to be predictive of well-being, few studies have examined their relationship with each other. Neither do we know much about the mediators and moderators of the relationship. This study investigated (1) the causal relationship between sleep quality and optimism in a college student sample, (2) the role of symptoms of depression, anxiety, and stress as mediators, and (3) how circadian preference might moderate the relationship. Internet survey data were collected from 1,684 full-time university students (67...
January 20, 2017: Chronobiology International
https://www.readbyqxmd.com/read/28107036/pitfalls-in-saliva-melatonin-measurement
#4
David J Kennaway, Mark D Salkeld
No abstract text is available yet for this article.
January 20, 2017: Chronobiology International
https://www.readbyqxmd.com/read/28102700/aryl-hydrocarbon-receptor-deficient-mice-are-protected-from-high-fat-diet-induced-changes-in-metabolic-rhythms
#5
Cassie Jaeger, Canxin Xu, Mingwei Sun, Stacey Krager, Shelley A Tischkau
High fat diet (HFD) consumption alters the synchronized circadian timing system resulting in harmful loss, gain or shift of transcriptional oscillations. The aryl hydrocarbon receptor (AhR) shares structural homology to clock genes, containing both PAS domains and basic helix-loop helix structural motifs, allowing for interaction with components of the primary circadian feedback loop. Activation of AhR alters circadian rhythmicity, primarily through inhibition of Clock/Bmal1-mediated regulation of Per1. AhR-deficient mice are protected from diet-induced metabolic dysfunction, exhibiting enhanced insulin sensitivity and glucose tolerance...
January 19, 2017: Chronobiology International
https://www.readbyqxmd.com/read/28060541/response-to-kennaway-et-al-comment-on-the-study-school-start-time-influences-melatonin-and-cortisol-levels-in-children-and-adolescents-a-community-based-study
#6
Alicia Carissimi, Lilian Corrêa da Silva, Cristian Patrick Zeni, Maria Paz Hidalgo
No abstract text is available yet for this article.
January 6, 2017: Chronobiology International
https://www.readbyqxmd.com/read/28060540/obituary-james-maris-waterhouse-2-august-1944-25-october-2016
#7
Greg Atkinson, Ben Edwards, Dietmar Weinert
No abstract text is available yet for this article.
January 6, 2017: Chronobiology International
https://www.readbyqxmd.com/read/28060532/critical-slowing-down-as-an-early-warning-of-transitions-in-episodes-of-bipolar-disorder-a-simulation-study-based-on-a-computational-model-of-circadian-activity-rhythms
#8
Atiyeh Bayani, Fatemeh Hadaeghi, Sajad Jafari, Greg Murray
Bipolar disorder is characterized by repeated episodes of mania and depression, and can be understood as pathological complex system behaviour involving cognitive, affective and psychomotor disturbance. Accurate prediction of episode transitions in the long-term pattern of mood changes in bipolar disorder could improve the management of the disorder by providing an objective early warning of relapse. In particular, circadian activity changes measured via actigraphy may contain clinically relevant signals of imminent systemic dysregulation...
January 6, 2017: Chronobiology International
https://www.readbyqxmd.com/read/28060525/diurnal-rhythms-in-psychological-reward-functioning-in-healthy-young-men-wanting-liking-and-learning
#9
Jamie E M Byrne, Greg Murray
A range of evidence suggests that human reward functioning is partly driven by the endogenous circadian system, generating 24-hour rhythms in behavioural measures of reward activation. Reward functioning is multifaceted but literature to date is largely limited to measures of self-reported positive mood states. The aim of this study was to advance the field by testing for hypothesised diurnal variation in previously unexplored components of psychological reward: 'wanting', liking, and learning using subjective and behavioural measures...
January 6, 2017: Chronobiology International
https://www.readbyqxmd.com/read/28055288/eveningness-as-a-risk-for-behavioral-problems-in-late-adolescence
#10
Ilona Merikanto, Anu-Katriina Pesonen, Liisa Kuula, Jari Lahti, Kati Heinonen, Eero Kajantie, Katri Räikkönen
Circadian preference toward eveningness has been associated with increased risk for mental health problems both in early adolescence and in adulthood. However, in late adolescence, when circadian rhythm naturally shifts to later, its significance for mental health is not clear. Accordingly, we studied how circadian rhythm estimated both by self-reported chronotype and by actigraph-defined midpoint of sleep was associated with self-reported psychiatric problems based on Youth Self Report (YSR). The study builds on a community cohort born in 1998, Helsinki, Finland...
January 5, 2017: Chronobiology International
https://www.readbyqxmd.com/read/28055282/amerindian-but-not-african-or-european-ancestry-is-significantly-associated-with-diurnal-preference-within-an-admixed-brazilian-population
#11
Kieren J Egan, Hadassa Campos Santos, Felipe Beijamini, Núbia E Duarte, Andréa R V R Horimoto, Tâmara P Taporoski, Homero Vallada, André B Negrão, José E Krieger, Mário Pedrazzoli, Kristen L Knutson, Alexandre C Pereira, Malcolm von Schantz
Significant questions remain unanswered regarding the genetic versus environmental contributions to racial/ethnic differences in sleep and circadian rhythms. We addressed this question by investigating the association between diurnal preference, using the morningness-eveningness questionnaire (MEQ), and genetic ancestry within the Baependi Heart Study cohort, a highly admixed Brazilian population based in a rural town. Analysis was performed using measures of ancestry, using the Admixture program, and MEQ from 1,453 individuals...
January 5, 2017: Chronobiology International
https://www.readbyqxmd.com/read/28055273/higher-scores-in-the-extraversion-personality-trait-are-associated-with-a-functional-polymorphism-in-the-per3-gene-in-healthy-subjects
#12
Karen M Jiménez, Angela J Pereira-Morales, Diego A Forero
A polymorphism in the PER3 (period circadian clock 3) gene has been associated with neuropsychiatric disorders and endophenotypes. We evaluated the possible association of personality domains with the PER3 polymorphism in a sample of healthy subjects: 271 individuals were evaluated with the Big Five Inventory and genotyped for the PER3 Variable Number Tandem Repeat (VNTR) polymorphism. We found a significant association between the PER3 polymorphism and the extraversion personality trait (p = 0.0093). The 5/5 genotype carriers showed higher scores for extraversion...
January 5, 2017: Chronobiology International
https://www.readbyqxmd.com/read/28055262/cross-cultural-validity-of-morningness-eveningness-stability-scale-improved-messi-in-iran-spain-and-germany
#13
Arash Rahafar, Christoph Randler, Juan F Díaz-Morales, Ali Kasaeian, Zeinab Heidari
Morningness-Eveningness Stability Scale improved (MESSi) is a newly constructed measure to assess circadian types and amplitude. In this study, we applied this measure to participants from three different countries: Germany, Spain and Iran. Confirmatory factorial analysis (CFA) of MESSi displayed mediocre fit in the three countries. Comparing increasingly stringent models using multigroup confirmatory factor analyses indicated at least partial measurement invariance (metric invariance) by country for Morning Affect and Distinctness subscales...
January 5, 2017: Chronobiology International
https://www.readbyqxmd.com/read/27997226/dysregulation-of-metallothionein-and-circadian-genes-in-human-hepatocellular-carcinoma
#14
Huan Li, Yuan-Fu Lu, Hong Chen, Jie Liu
Hepatocellular carcinoma (HCC) is the major threat to human health, and disruption of circadian clock genes is implicated in hepatocarcinogenesis. This study examined the dysregulation of metallothioneins and circadian genes in achieved human HCC (n = 24), peri-HCC tissues (n = 24) as compared with normal human livers (n = 36). Total RNA was extracted and reverse transcribed. Real-time RT-qPCR was performed to determine the expression of genes of interest. The results demonstrated the downregulation of metallothionein-1 (MT-1), MT-2, and metal transcription factor-1 (MFT-1) in human HCC as compared with Peri-HCC and normal tissues...
December 20, 2016: Chronobiology International
https://www.readbyqxmd.com/read/27996309/the-association-between-artificial-light-at-night-and-prostate-cancer-in-gwangju-city-and-south-jeolla-province-of-south-korea
#15
Ka Young Kim, Eunil Lee, Yun Jeong Kim, Jinsun Kim
ABSRACT Exposure to artificial light at night (ALAN) has been reported to be associated with various pathological changes including sleep deprivation, circadian rhythm disruption, and melatonin suppression with increase in various cancers such as breast or prostate cancers. In this study, we sought to elucidate the association between ALAN and prostate cancer in 27 districts within Gwangju City and urban and rural areas from South Jeolla Province in South Korea. We analyzed the correlation between ALAN and the incidence of a range of cancers by Poisson regression analysis, after adjustment for confounding risk factors, such as smoking, drinking, obesity, stress, air pollution (particulate matter <10 μm in diameter), urbanization (proportion of urbanized area), and the cancer screening rate...
December 20, 2016: Chronobiology International
https://www.readbyqxmd.com/read/27996307/clock-genes-associate-with-white-matter-integrity-in-depressed-bipolar-patients
#16
Irene Bollettini, Elisa Maria Teresa Melloni, Veronica Aggio, Sara Poletti, Cristina Lorenzi, Adele Pirovano, Benedetta Vai, Sara Dallaspezia, Cristina Colombo, Francesco Benedetti
Human genetic studies have implicated specific genes that constitute the molecular clock in the manifestation of bipolar disorder (BD). Among the clock genes involved in the control system of circadian rhythms, CLOCK 3111 T/C and Period3 (PER3) influence core psychopathological features of mood disorders, such as patterns of sleep, rest, and activity, diurnal preference, cognitive performances after sleep loss, age at the onset of the illness, and response to antidepressant treatment. Furthermore, several studies pointed out that bipolar symptomatology is associated with dysfunctions in white matter (WM) integrity, suggesting these structural alterations as a possible biomarker of the disorder...
December 20, 2016: Chronobiology International
https://www.readbyqxmd.com/read/27906554/sleep-quality-and-high-intensity-interval-training-at-two-different-times-of-day-a-crossover-study-on-the-influence-of-the-chronotype-in-male-collegiate-soccer-players
#17
Jacopo A Vitale, Matteo Bonato, Letizia Galasso, Antonio La Torre, Giampiero Merati, Angela Montaruli, Eliana Roveda, Franca Carandente
The influence of the chronotype on the sleep quality in male collegiate soccer players in response to acute high intensity interval training (HIIT) performed at two different times of day was evaluated. The sleep quality was poorer in the morning-type than in the evening-type players after the evening HIIT session, whereas no significant changes in the sleep quality of the two chronotypes after the morning HIIT session was observed. The results suggest that an athlete's chronotype should be taken into account when scheduling training sessions and to promote faster recovery processes...
December 1, 2016: Chronobiology International
https://www.readbyqxmd.com/read/27906548/circadian-fluctuations-in-circulating-plasminogen-activator-inhibitor-1-are-independent-of-feeding-cycles-in-mice
#18
Katsutaka Oishi, Naoki Ohkura, Yuki Yasumoto, Saori Yamamoto
To evaluate the involvement of the day-night feeding cycle in the circadian regulation of circulating plasminogen activator inhibitor-1 (PAI-1) concentrations, mice were fed with a diet for eight hours during either daytime (DF) or nighttime (NF) for one week. The reversed feeding cycle did not affect the circadian phases of plasma PAI-1 levels as well as the nocturnal wheel-running activity, although the phase of Pai-1 mRNA expression was significantly advanced for 8.6 hours in the livers of DF, compared with NF mice...
December 1, 2016: Chronobiology International
https://www.readbyqxmd.com/read/27830946/seven-day-human-biological-rhythms-an-expedition-in-search-of-their-origin-synchronization-functional-advantage-adaptive-value-and-clinical-relevance
#19
Alain E Reinberg, Laurence Dejardin, Michael H Smolensky, Yvan Touitou
This fact-finding expedition explores the perspectives and knowledge of the origin and functional relevance of the 7 d domain of the biological time structure, with special reference to human beings. These biological rhythms are displayed at various levels of organization in diverse species - from the unicellular sea algae of Acetabularia and Goniaulax to plants, insects, fish, birds and mammals, including man - under natural as well as artificial, i.e. constant, environmental conditions. Nonetheless, very little is known about their derivation, functional advantage, adaptive value, synchronization and potential clinical relevance...
November 10, 2016: Chronobiology International
https://www.readbyqxmd.com/read/27813687/the-effects-of-a-transcontinental-flight-on-markers-of-coagulation-and-fibrinolysis-in-healthy-men-after-vigorous-physical-activity
#20
Brian R Kupchak, William J Kraemer, David R Hooper, Cathy Saenz, Lexie L Dulkis, Paul J Secola, Lee E Brown, Andrew J Galpin, Jared W Coburn, William H DuPont, Lydia K Caldwell, Jeff S Volek, Carl M Maresh
PURPOSE: Athletes and military service members are known to undergo strenuous exercise and sometimes have to take long haul flights soon afterwards; however, its combined effect on many physiological functions is relatively unknown. Therefore, we examined the combined effects of a full-body muscle-damaging workout and transcontinental flight on coagulation and fibrinolysis in healthy, resistance trained men. We also determined the efficacy of a full-body compression garment in limiting their coagulation responses...
November 4, 2016: Chronobiology International
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