A recent study published in Cells in March 2025 has provided valuable insights into the regenerative behaviour of human skin when transplanted onto immunodeficient mice.

The research focuses on understanding how the epidermal proliferation patterns recover in such xenograft models, offering potential advancements in dermatological treatments and skin transplantation techniques. 

Researchers obtained full-thickness human skin samples, including all dermal layers and appendages, from consenting patients undergoing plastic surgeries. These samples were then transplanted onto 8-week-old NOD SCID mice. Biopsies were collected at intervals of 40, 75, and 110 days post-grafting to analyse the restoration process. 

The study employed advanced imaging and computational clustering techniques to assess keratinocyte heterogeneity and proliferation dynamics within the epidermal basal layer.

Findings indicated that the xenografted human skin successfully restored most skin structures, including hair follicles, sebaceous glands, and sweat glands. Notably, the epidermal stem cell niche structure was also reestablished, underscoring the model’s potential to mimic human skin regeneration dynamics effectively. 

These results suggest that human skin xenografts can serve as a functional in vivo model for studying human skin behaviour, disease pathologies, and potential treatments.

By providing a reliable microenvironment that closely resembles actual human tissue functioning, this model could be instrumental in advancing research on skin regeneration and developing novel therapeutic strategies.