Sexual dimorphism in epidermal stem cell dynamics.

Sexual dimorphism in epidermal stem cell dynamics shows female mice have synchronized cell division and differentiation, accelerating wound healing.

• Why it matters: Understanding sex-specific differences in epidermal stem cell behavior is crucial for insights into skin regeneration and wound healing, addressing gaps in knowledge about cellular heterogeneity and regulation.
• What they did: The study used intravital time-lapse imaging, single-cell RNA sequencing, and clonal analyses in mice, including castrated males, to investigate epidermal cell fate and hormonal influences.
• The result: Findings reveal female mice exhibit a highly synchronized pattern of epidermal cell activity, while male sex hormones promote stem cell differentiation and delamination, highlighting sex-specific regulation of epidermal homeostasis.