Mitochondrial Stress Contributes to Atopic Dermatitis

The study investigated the role of innate lymphoid cells-type 1 (ILC1) in the development of alopecia areata (AA). Researchers found that ILC1-like cells (ILC1lc) were significantly increased around hair follicles (HFs) in AA patients. When co-cultured with stressed human scalp HFs, these cells induced key features of AA, including premature HF regression and immune privilege collapse. Blocking NKG2D or neutralizing IFNg counteracted these effects. Additionally, injecting activated ILC1lc into healthy human scalp skin on mice induced AA lesions, suggesting that ILC1lc alone could trigger AA, challenging the belief that AA is solely a CD8+ T cell-driven autoimmune disease.