Abstract
The migration of dermal mast cells to skin-draining lymph nodes is a key step in UV-induced immunosuppression. Examining the effects of platelet-activating factor (PAF), a phospholipid mediator secreted by keratinocytes following UV exposure, on mast cells, Damiani et al. demonstrate that increased expression of CXCR4 is associated with increased histone acetylation at the promoter of this chemokine receptor gene.
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