TLDR Staphylococcus aureus delays wound healing by disrupting lipid metabolism in skin cells.
The study investigates how Staphylococcus aureus impairs wound healing by using mouse and human models. It was found that S. aureus delays wound repair through quorum sensing, which inhibits lipid metabolism in keratinocytes, unlike commensal Staphylococcus. The accessory gene regulator (agr) system of S. aureus is crucial for this process, as strains with inactive agr did not delay healing. Synthetic phenol soluble modulins (psmα1 and psmα4), controlled by agr, also inhibited lipid metabolism in vitro. Despite single gene deletions (psmA, psmB, hla, or hld), S. aureus still delayed repair, indicating the use of multiple agr-dependent factors. This research highlights quorum sensing and lipid biosynthesis as key elements in wound healing disruption.
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