Activation of allogeneic T cells by DCs. PBMCs from healthy unrelated donors were stained with CFSE and cocultured with DCs at a ratio of 10:1. After 6 days, proliferation was assessed by flow cytometry. (A) Representative examples of unstimulated cells and proliferating cells are shown in the presence of PHA (3 μg/mL) and after coculture with DCs generated from HCs and two AML patients (AML #5, AML #12). (B) Stimulation index of DCs generated from HCs and AML patients with cocktail C, CP, R, and RP (n = 3-9) are summarized as mean ± SD.