Number and function of circulating human antigen presenting cells regulated by sleep.
Stoyan Dimitrov1, Tanja Lange, Klaus Nohroudi
1Department of Neuroendocrinology, University of Lübeck, Germany.
Sleep
|May 25, 2007
Summary
Sleep significantly boosts myeloid dendritic cell precursors (pre-mDC) that produce IL-12, enhancing adaptive immune responses. This highlights sleep
Area of Science:
- Immunology
- Sleep Science
- Circadian Biology
Background:
- Sleep is known to influence the adaptive immune response and immunologic memory.
- Dendritic cells (DCs) are crucial for initiating immune responses.
- Sleep-induced changes in DC number and function may mediate immune enhancement.
Purpose of the Study:
- To differentiate the effects of sleep versus circadian rhythm on immune cells.
- To investigate sleep's impact on circulating dendritic cell precursors (pre-mDC, PDC) and monocytes.
- To assess sleep's influence on IL-12 and IFN-alpha production by these cells.
Main Methods:
- Within-subject cross-over design comparing normal sleep-wake cycle with 24-hour wakefulness.
- Controlled laboratory conditions with blood sampling at regular intervals.
- Analysis of monocyte subsets, pre-mDC, PDC, and cytokine production (IL-12, IFN-alpha) in 27 healthy young men.
Main Results:
- Sleep increased the number of IL-12 producing pre-mDC, crucial for Th1 responses.
- Sleep decreased PDC and T cell counts, and CD14(dim)CD16+ monocytes.
- IFN-alpha production by PDC was not affected by sleep.
Conclusions:
- Pre-mDC producing IL-12 are a key target of sleep's immune-enhancing effects.
- Sleep enhances adaptive immune responses by modulating specific dendritic cell populations.
- Findings link sleep to improved antigen-presenting cell (APC) function and immune readiness.
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