
The study found that CD47 is overexpressed in sun-exposed aged skin and photoaged fibroblasts, impairing macrophage-mediated clearance via the CD47/SIRPα axis. Blocking this axis enhanced fibroblast elimination. CD47 expression correlated with reduced collagen, increased elastin, and higher p16 levels. These findings suggest CD47 is a promising biomarker and therapeutic target in photoaging.
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