Sleep depth and fatigue: role of cellular inflammatory activation.

Brain, Behavior, and Immunity
KaMala S ThomasMichael R Irwin

Abstract

Individuals with underlying inflammation present with a high prevalence of non-specific co-morbid symptoms including sleep disturbance and fatigue. However, the association between cellular expression of proinflammatory cytokines, alterations of sleep depth and daytime fatigue has not been concurrently examined. In healthy adults (24-61 years old), evening levels of monocyte intracellular proinflammatory cytokine production were assessed prior to evaluation of polysomnographic sleep and measures of fatigue the following day. Stimulated monocyte production of interleukin-6 (IL-6), but not tumor necrosis factor α (TNF-α), was negatively associated with slow wave sleep (ΔR²=.17, p=.029). In contrast, stimulated monocyte production of IL-6 was positively associated with rapid-eye movement (REM) sleep duration during the first sleep cycle (ΔR²=.26, p<.01). Moreover, evening stimulated production of IL-6 was associated with fatigue the following day (ΔR²=.17, p=.05). Mediation analyses showed that slow wave sleep, but not REM sleep duration, mediated the relationship between evening levels of IL-6 production and daytime fatigue. These results indicate that increases in stimulated monocyte production of IL-6 may be associated with dec...Continue Reading

Associated Clinical Trials

May 8, 2015·Tiffany J. Braley, MD, MS, Tiffany J. Braley, MD, MS

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