IL-6 after wake-up in human males: Exposure to red versus blue light and the interplay with cortisol
Loading...
Date issued
Editors
Journal Title
Journal ISSN
Volume Title
Publisher
Reuse License
Abstract
Light is essential in shaping human circadian rhythms, including that of the hormone cortisol. While cortisol is known to influence secretion of the cytokine IL-6, the influence of light itself on IL-6 remains unclear. Thus, this study investigated the effects of two light conditions – red and blue – on IL-6 concentrations and the cortisol awakening response in blood. The interplay between cortisol and IL-6 was explored as well. The between-subject experiment was conducted with 71 healthy adult men (aged Mred = 24.30, SD = 3.56; Mblue = 24.40, SD = 3.51) in a standardized sleep laboratory setting with 60-min light exposure post-awakening at 05:00 a.m. Two mixed models, with light condition and time across measurement points as factors, were calculated. In the one for cortisol, chronotype was introduced as a covariate. Mean cortisol concentrations did not differ between exposure to red vs. blue light (p = 0.443), but overall cortisol output (area under the curve with respect to ground; AUCG) and sensitivity (a
Description
Keywords
Citation
Published in
Brain, behavior, & immunity - health / Psychoneuroimmunology Research Society (PNIRS), 40, Elsevier B. V,, Amsterdam, 2024, https://doi.org/10.1016/j.bbih.2024.100833