The Pattern of Fas and Fas Ligand Expression in Alopecia Areata

This study investigates the expression patterns of Fas and Fas ligand (FasL) in alopecia areata (AA) using the C3H/HeJ mouse model. The results show a significantly higher number of FasL+CD45+ cells in the perifollicular inflammatory infiltrates of both lesional and non-lesional skin samples from mice with active AA compared to healthy controls. Additionally, there is an increased expression of CD8 and NKG2D in these samples. The Fas receptor is consistently expressed across all samples, regardless of AA status. These findings suggest a potential pathogenic role of the Fas/FasL pathway in AA, highlighting the need for further research into therapies targeting this pathway.