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Effects of sleep and circadian rhythm on human circulating immune cells.

J Born, T Lange, K Hansen, M Mölle and H L Fehm
J Immunol May 1, 1997, 158 (9) 4454-4464;
J Born
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T Lange
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K Hansen
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M Mölle
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H L Fehm
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Abstract

The role of nocturnal sleep for normal immune regulation and its relation to circadian rhythm was examined in 10 men participating in two 51-h sessions. One session included two regular wake-sleep cycles; the other included a night of sustained wakefulness followed by a night of recovery sleep. Blood was collected every 3 h to determine PBMC counts, including the enumeration of monocytes, NK cells, and lymphocyte subsets (CD19+, CD3+, CD4+, CD8+, HLA-DR+). Production of IL-1beta, TNF-alpha, IL-2, and IFN-gamma was determined after stimulation of whole blood samples with LPS and PHA, respectively. Concentrations of IL-6 and cortisol were assessed in plasma. Enumeration of cells indicated significant circadian rhythms for all PBMC subsets under conditions of sustained wakefulness. Compared with sustained wakefulness, nocturnal sleep acutely reduced the numbers of monocytes, NK cells, and counts of all lymphocyte subsets. However, in the afternoon and evening of the day following sleep, counts of NK cells and lymphocytes were significantly higher than after nocturnal wakefulness, indicating that effects of sleep interacted with those of the circadian pacemaker. Sleep markedly enhanced production of IL-2 by T cells (CD3+) but did not influence production of IL-1beta and TNF-alpha, or IL-6 concentrations. Effects of sleep were not mediated by changes in cortisol. The decrease in monocytes, NK cells, and lymphocytes, together with an increased production of IL-2 during sleep, may serve to support ongoing immune defense in extravascular lymphoid tissue during a time of diminished acute Ag challenge.

  • Copyright © 1997 by American Association of Immunologists

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The Journal of Immunology
Vol. 158, Issue 9
1 May 1997
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Effects of sleep and circadian rhythm on human circulating immune cells.
J Born, T Lange, K Hansen, M Mölle, H L Fehm
The Journal of Immunology May 1, 1997, 158 (9) 4454-4464;

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Effects of sleep and circadian rhythm on human circulating immune cells.
J Born, T Lange, K Hansen, M Mölle, H L Fehm
The Journal of Immunology May 1, 1997, 158 (9) 4454-4464;
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Print ISSN 0022-1767        Online ISSN 1550-6606