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Journal of Circadian Rhythms
137 Publications
OpenAIRE 3.0 (OA, funding)


  • Relationship Between the Cortisol-Estradiol Phase Difference and Affect in Women

    Butler, Karyn Geralyn (2018)
    Affective disorders impact women’s health, with a lifetime prevalence of over twelve per cent. They have been correlated with reproductive cycle factors, under the regulation of hormonal circadian rhythms. In affective disorders, circadian rhythms may become desynchronized. The circadian rhythms of cortisol and estradiol may play a role in affective disorders. The purpose of this study was to explore the temporal relationship between the rhythms of cortisol and estradiol and its relationship ...

    Are Type 2 Diabetes Mellitus and Depression Part of a Common Clock Genes Network?

    Karthikeyan, Ramanujam; Spence, David Warren; Brown, Gregory M.; Pandi-Perumal, Seithikurippu R. (2018)
    In recent years, there has been an increased prevalence of type 2 diabetes mellitus (T2DM) and depression across the world. This growing public health problem has produced an increasing socioeconomic burden to the populations of all affected countries. Despite an awareness by public health officials and medical researchers of the costs associated with these diseases, there still remain many aspects of how they develop that are not understood. In this article, we propose that the circadian clo...

    Comparison of Melatonin Profile and Alertness of Firefighters with Different Work Schedules

    Kazemi, Reza; Zare, Sajad; Hematjoo, Rasol (2018)
    Introduction: A two-shift work schedule with different rotations is common among firefighters in Iranian petrochemical companies. This study compared salivary melatonin and sleepiness on the last night before turning to day shift at 19:00, 23:00, 3:00, and 7:00 among petrochemical firefighters (PFFs) working seven and four consecutive night shifts.Methods: Sixty four PFFs working in the petrochemical industry were selected. To measure melatonin, saliva samples were taken, whereas the KSS inde...

    Seasonal Variation in Bright Daylight Exposure, Mood and Behavior among a Group of Office Workers in Sweden

    Adamsson, Mathias; Laike, Thorbjörn; Morita, Takeshi (2018)
    The purpose of the study was to investigate seasonal variation in mood and behavior among a group of office workers in Sweden (56°N). Thirty subjects participated in this longitudinal study. The subjects kept a weekly log that included questionnaires for ratings of psychological wellbeing and daily sleep-activity diaries where they also noted time spent outdoors. The lighting conditions in the offices were subjectively evaluated during one day, five times over the year. There was a seasonal v...

    Circadian behavior of mice deficient in PER1/PML or PER2/PML

    Miki, Takao; Chen-Goodspeed, Misty; Zhao, Zhaoyang; Lee, Cheng Chi (2013)
    Background Our recent studies demonstrate that the murine homolog of the human tumor suppressor promyelocytic leukemia (PML) regulates circadian behavior of mice. To further gather insight into PML?s contribution to circadian behavior, we generated two strains of mice deficient in one of the two period (Per) genes and the PML gene, with Per1 ?/? /Pml ?/? and Per2 ?/? /Pml ?/? genotypes. Results Here we report the circadian behavior of these mice based on wheel-running behavioral analysis. In ...
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