Figure 3.

T_reg cells from RA patients show decreased CD25 expression. CD25 expression level was measured by flow cytometry in (A) CD4⁺ T cells, (B) CD4⁺CD25⁺, CD4⁺Foxp3⁺, or CD4⁺CD25⁺Foxp3⁺ T_reg cells, and (C) CD4⁺CD25⁺CD127^−/low, CD4⁺CD25⁺CD127^−/lowFoxp3⁺ T_reg cells in PBMC from healthy controls (HC, n = 13) and RA patients (RA, n = 13). Statistical differences were calculated by Mann–Whitney test.