CD201⁺ fascia progenitors choreograph injury repair

Area of Science:

• Regenerative Medicine
• Dermatology
• Cell Biology

Background:

• Optimal tissue recovery relies on precisely controlled inflammation, contraction, and scar formation.
• Fibroblasts play a critical role in wound healing, but their origins and regulation are not fully understood.

Purpose of the Study:

• To identify and characterize a progenitor cell responsible for fibroblast generation during wound healing.
• To elucidate the differentiation pathways and regulatory mechanisms controlling fibroblast subtypes in tissue repair.

Main Methods:

• Utilized mouse skin injury models.
• Employed single-cell transcriptomics and genetic lineage tracing.
• Performed cell ablation and gene deletion studies.

Main Results:

• Identified a multipotent fibroblast progenitor (CD201+) in the fascia.
• Demonstrated that CD201+ progenitors generate proinflammatory and myofibroblasts in a spatiotemporal sequence.
• Found retinoic acid and hypoxia signaling regulate entry into proinflammatory and myofibroblast states.
• Showed that modulating CD201+ progenitor differentiation impairs healing.

Conclusions:

• CD201+ progenitors are key regulators of wound healing pace and fibroblast differentiation.
• Understanding these progenitor pathways offers a new strategy for treating impaired wound healing.
• This discovery provides a roadmap for therapeutic interventions targeting fibroblast populations.