Regulatory γδ T Cells Protect Human Scalp Hair Follicles From Alopecia Areata In Vivo And Represent Potential Therapeutic Target
July 2025
in “
Journal of Investigative Dermatology
”
New to Alopecia Areata? There is a guide in the encyclopedia. Read the guide → Studysummary This study found that autologous Foxp3+ γδTregs, when tested in human scalp hair follicle models and mouse xenotransplants, can both prevent and treat alopecia areata by reducing immune privilege collapse and lymphocytic infiltration, suggesting their potential as a novel cell-based therapy for the disease. Our plain-language summary of this paper — not a Tressless recommendation.
This study investigates the role of immunosuppressive Foxp3+ γδTregs in preventing and treating alopecia areata (AA). Researchers generated autologous Foxp3+ γδTregs and confirmed their markers and secretory activities. These γδTregs were tested both ex vivo with stressed human scalp hair follicles and in vivo in human skin xenotransplants on SCID/beige mice. The results showed that γδTregs mitigated hair follicle immune privilege collapse and hair growth inhibition by secreting IL-10 and TGF-β1. In vivo, γδTregs significantly reduced AA lesion development and restored hair follicle immune privilege. This study provides the first evidence that γδTregs can be both preventive and therapeutic in human AA, suggesting their potential as novel cell-based therapeutics for AA management.
