Fibroblast Depletion Reveals Mammalian Epithelial Resilience Across Neonatal and Adult Stages

This study investigates the role of fibroblasts in regulating epidermal stem cell proliferation in vivo. Surprisingly, the researchers found that significant depletion of fibroblast density does not affect the proliferative capacity of epidermal stem cells during both neonatal and adult stages. Despite changes in basement membrane mechanics and epidermal stem cell delamination following neonatal fibroblast depletion, the skin maintains its protective barrier function. These findings suggest that the skin's regenerative program has robust compensatory mechanisms that allow it to maintain functional capacity even with a reduced fibroblast population.