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Preparation of Single-cell Suspensions for Cytofluorimetric Analysis from Different Mouse Skin Regions
Published on: April 20, 2016
Circadian clocks guide dendritic cells into skin lymphatics
Stephan J Holtkamp1, Louise M Ince2, Coline Barnoud2
1Biomedical Center (BMC), Institute for Cardiovascular Physiology and Pathophysiology, Walter Brendel Center for Experimental Medicine (WBex), Faculty of Medicine, Ludwig-Maximilians-Universität Munich, Planegg-Martinsried, Germany.
Immune cells called dendritic cells (DCs) migrate into lymphatic vessels in a daily rhythm, controlled by internal body clocks. This discovery impacts understanding of immune responses, vaccination, and therapies.
Area of Science:
- Immunology and Chronobiology: Investigating the intersection of circadian rhythms and immune cell trafficking.
Background:
- Leukocyte migration to lymph nodes is crucial for adaptive immunity.
- Circadian rhythms influence leukocyte trafficking via the bloodstream.
Discussion:
- Dendritic cell (DC) migration into skin lymphatics exhibits a circadian pattern, peaking during the rest phase.
- This rhythm is regulated by daily fluctuations in CCL21 chemokine and adhesion molecule expression.
- Chronopharmacological interventions can disrupt this circadian migration.
Key Insights:
- Cell-intrinsic circadian oscillations in skin lymphatic endothelial cells (LECs) and DCs govern DC trafficking rhythms.
- Disrupting circadian clocks in either LECs or DCs eliminates the rhythmic migration of DCs.
- Circadian clocks regulate DC infiltration into skin lymphatics.
Outlook:
- Findings are relevant for optimizing vaccination and immunotherapy strategies.
- Potential for chronotherapy to enhance immune responses.
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