CD8A and vitiligo: Moreover, the function of Tregs has been shown impaired in vitiligo patients, with weaker suppressive effect of Tregs on autologous CD8+T cells4 and decreased expression level of Foxp3 and cytotoxic T lymphocyte antigen‐4 (CTLA‐4) that induces the anergy of effector T cells.6 Therefore, amending the impaired function of Tregs is another way to reconstruct the autoimmune tolerance and may be applied to the treatment for vitiligo.