Natural killer cells activity in a metastatic colorectal cancer patient with complete and long lasting response to therapy

Figure 4 Characterization of regulatory cells. Flow cytometry was performed on fresh venous blood; A: Identification of circulating T regulatory cells (Treg) on CD4+ cells (gate on low CD127 and high CD25). B: Identification of four types circulating myeloid-derived suppressor cells (MDSCs1, 2, 3, 4). Percentages are relative to peripheral blood lymphocytes.