Figure 1. Frequency of CD4⁺ and CD8⁺ Tregs in PBMCs from healthy donors and gastric cancer patients upon treatment with PBS or with 1, 10, or 50 µg/mL Tα1. A, Analysis of the CD4⁺CD25⁺Foxp3⁺ subpopulation of PBMCs from healthy donors and B, gastric cancer patients. C, Analysis of the CD8⁺ and CD8⁺Foxp3⁺ subpopulations of PBMCs from healthy donors and D, gastric cancer patients. Tregs = regulatory T cells; PBMCs = peripheral blood mononuclear cells.