KLRK1 and acute myeloid leukemia: As shown in Figures 3A,B, we observed a parabola-shaped curve of the activating receptors NKG2D and NKp46 expression on AML-NK cells surface after exposure to a range of concentrations of decitabine for 24 h (0–10 μmol/L) and the NKp46 expression levels differed significantly among different groups (Figure 3A, p = 0.0038).