Journal
CURRENT OPINION IN PULMONARY MEDICINE
Volume 11, Issue 6, Pages 481-484Publisher
LIPPINCOTT WILLIAMS & WILKINS
DOI: 10.1097/01.mcp.0000183062.98665.6b
Keywords
cytokines; ghrelin; hypothalamic-pituitary-adrenal axis; sleep
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Funding
- NHLBI NIH HHS [HL080972] Funding Source: Medline
- NIGMS NIH HHS [GM067189] Funding Source: Medline
- NIMH NIH HHS [MH64843] Funding Source: Medline
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Purpose of review Cytokines are mediators of immune system responses with multiple biologic actions on several target tissues. Over the past two decades, research has explored the interactions between cytokines and sleep mechanisms of the brain. This short review highlights selected findings that have advanced our understanding of the relation between cytokines and sleep. Recent findings A complex network of cytokines and their receptors exists in brain. Cytokines may either promote or inhibit sleep. Of cytokines studied thus far, evidence indicates that interleukin-1 and tumor necrosis factor play a role in the regulation of non-rapid eye movement sleep, Their sites of action for regulating such sleep likely include the hypothalamic preoptic area and the basal forebrain. Mechanisms of action include direct receptor-mediated effects on neurons and the synthesis and release of numerous transmitters, pepticles, and hormones that lead to subsequent changes in sleep. Among others, the cascade of responses induced by cytokines that may lead to subsequent alterations in sleep includes alterations in nitric oxide synthesis and effects on neurohormonal systems such as growth hormone releasing hormone. The activation by cytokines of the hypothalamic-pituitary-ad renal axis also influences sleep. Studies suggest that there is a significant overlap between neurohormonal systems such as the somatotropic and hypothalamic-pituitary-adrenal axes and cytokines, particularly with regard to their effects on sleep-wake regulation. Summary There is increasing evidence of a role for cytokines in regulating spontaneous non-rapid eye movement sleep. The somatotropic hormonal system and hypothalamic-pituitary-ad renal axis mediate, in part, the effects of cytokines on sleep.
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