KLRK1 and leukemia: This finding was confirmed by Li and coworkers, who similarly demonstrated an inhibition of viability and increased apoptosis of NK cells upon incubation with high resveratrol concentrations (50 μM), whereas low concentrations from 1.56 μM to 3.13 μM resulted in upregulation of NKG2D and IFN-γ on mRNA as well as protein levels and an increased NK cell killing towards leukaemia K562 target cells (Fig. 3) [85].