The Role of T-Helper 17 Cells and Regulatory T Cells in Acute Diffuse and Total Alopecia: The Increased Function of Regulatory T Cells May Explain the Favorable Prognosis

The study examines the role of T-helper 17 (Th17) cells and regulatory T (Treg) cells in acute diffuse and total alopecia (ADTA), a variant of alopecia areata with a favorable prognosis. Conducted on 24 patients with ADTA and 12 healthy controls, it found distinct patterns of Th17 and Treg cells in patients, with increased Treg function potentially contributing to rapid recovery. Significant differences in cytokine profiles, such as increased IL-2, IL-10, and IL-23A levels, were observed in patients. The study suggests that Treg activation and decreased Th17 activation may explain ADTA's favorable prognosis, though conclusions are limited by the small sample size and lack of comparison with other alopecia areata types.