Figure 4. Flow cytometric analysis of T_reg cells according to different markers.

Peripheral blood from one representative hearing-loss patient treated for 3 days (A, C, E, G) and 14 days (B, D, F, H) with glucocorticoid regimen was analyzed for the presence of regulatory T cells according to the following markers: CD4⁺ CD25^high and FOXP3⁺ (A, B), AITR⁺ (C, D) CD127_low (E, F) and CTLA4⁺ (G, H). Only CD4⁺ cells are depicted and the percentages indicate the relative frequency of T_reg cells within this subpopulation.