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Source: Chronobiology International
Drug: Melatonin
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Total 88 results found since Jan 2013.
Investigating the effects of a blue-blocking software on the daily rhythm of sleep, melatonin, cortisol, positive and negative emotions
In this study, we examine the effect of the blue light on sleep and wakefulness rhythms and positive and negative emotions. This randomized clinical trial was conducted with 80 AJA University of Medical Sciences employees who use computers at least 2 h a day. All subjects were employees of the discharge unit of Imam Reza Hospital, which is located next to AJA University. The subjects were divided into two groups of 40 people, blue light filter software intervention and sham treatment. Pittsburgh Sleep Quality Index (PSQI), Positive and Negative Affect Schedule (PANAS), Visual Function Questionnaire (VFQ), Epworth Sleepines...
Source: Chronobiology International - June 11, 2023 Category: Biology Authors: Ali Makateb Ali Rashidinia Keivan Khosravifard Parviz Dabaghi Source Type: research
Disaggregating the effects of daytime and nighttime light exposures on obesity, overweight, prostate and breast cancer morbidity worldwide
In this study, we aim to narrow this knowledge gap by analyzing data available for 100+ countries worldwide, while controlling ALAN and solar radiation exposure estimates by several potential confounders, such as GDPpc, GINI inequality index and unhealthy food consumption. As the study reveals, all the morbidity types under analysis are significantly and positively associated with ALAN exposure estimates (p < 0.05), while solar radiation appears to be significantly associated with prostate cancer rates only (p < 0.05), but not with breast cancer or overweight/obesity rates (p > 0.1). To the best of our knowledge, ...
Source: Chronobiology International - April 4, 2023 Category: Biology Authors: Maram Sirhan-Atalla Nahum M Gabinet Boris A Portnov Source Type: research
Photoperiodic adaptation of < em > aanat < /em > and clock gene expression in seasonal populations of < em > Daphnia pulex < /em >
Chronobiol Int. 2023 Mar 30:1-9. doi: 10.1080/07420528.2023.2195942. Online ahead of print.ABSTRACTChanges in day-length entrain the endogenous clock of organisms leading to complex responses to photoperiod. In long-lived organisms experiencing several seasons this response of the clock to photoperiod is phenotypically plastic. However, short-lived organisms often experience a single season without pronounced changes in day-length. For those, a plastic response of the clock to different seasons would not necessarily be adaptive. In aquatic ecosystems, zooplankton species like Daphnia live only for some weeks, i.e. one week...
Source: Chronobiology International - March 30, 2023 Category: Biology Authors: Anke Schwarzenberger Patrick Bartolin Alexander Wacker Source Type: research
Factors associated with variability in the melatonin suppression response to light: A narrative review
Chronobiol Int. 2023 Mar 23:1-15. doi: 10.1080/07420528.2023.2188091. Online ahead of print.ABSTRACTLight is the main environmental signal synchronizing circadian rhythms to the 24-hour light-dark cycle. Recent research has identified significant inter-individual variability in the sensitivity of the circadian system to light as measured by, among other indicators, melatonin suppression in response to light. These inter-individual differences in light sensitivity could result in differential vulnerability to circadian disruption and related impacts on health. A growing body of experimental evidence points to specific facto...
Source: Chronobiology International - March 23, 2023 Category: Biology Authors: Carolyn B Swope Shengliang Rong Carolina Campanella Regina Vaicekonyte Andrew Jk Phillips Sean W Cain Elise M McGlashan Source Type: research
Melatonin immunoreactivity of epidermal skin is higher in the evening than morning but does not account for erythema sensitivity
Chronobiol Int. 2022 Dec 28:1-13. doi: 10.1080/07420528.2022.2157733. Online ahead of print.ABSTRACTThe skin is a site of melatonin synthesis, and melatonin has a role in protecting against ultraviolet radiation-induced damage. Ultraviolet B (UVB) induced erythema seems to vary between morning and evening. We investigated whether epidermal melatonin immunoreactivities in the morning differed from those in the evening, and whether UVB-induced erythema was associated with these melatonin immunoreactivities in healthy volunteers. Erythema sensitivity of the skin was determined in the morning and in the evening by scoring the ...
Source: Chronobiology International - December 28, 2022 Category: Biology Authors: Veera Nikkola Riitta Huotari-Orava Heli Joronen Mari Gr önroos Hannu Kautiainen Lasse Ylianttila Erna Snellman Timo Partonen Source Type: research
