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This review discusses the dual role of tissue-resident memory T cells in providing immune protection against infections and cancer and contributing to autoimmune skin disease pathology, without presenting new experimental results.

This research explored the roles of various T cell types in chronic alopecia areata, finding that increased severity of lesions and hair loss may be linked to decreased lesional Foxp3+ Tregs, with a notable role for IL-17 and Th17 lymphocytes in the pathological process.

This study suggests that IL-17 may play a more significant role than IFN-γ in the pathogenesis of chronic alopecia areata, with increasing severity linked to Th17 lymphocytes and cytotoxic T lymphocyte infiltration.

This study found that in chronic alopecia areata, increased IL-17 expression and CD8+CD49a-Trm cell infiltration in hair follicles were associated with more severe histopathologic gradings, while Foxp3+mTreg infiltration decreased.

This review highlights the role of epidermal tissue-resident memory T (T RM) cells in human skin, showing their involvement in immune surveillance and regulation within the epidermis, and suggesting their importance in understanding skin diseases like HIV infection and vitiligo.