Abstract
Although our knowledge of host-commensal interactions has increased exponentially, the mechanisms linking a specific commensal, its detection by the immune system, and its impact on tissue function are still often poorly understood. In a recent study in Cell, Linehan et al. dissect one of these interactions in the context of the skin, and demonstrate that Staphylococcus epidermidis antigens, presented through a non-classical pathway, drive the accumulation of CD8+ T cells that promote wound healing.
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