KLRK1 and acute myeloid leukemia: They discovered that NK cell-derived exosomes containing killer-cell immunoglobulin-like receptors, TGF, perforin, NKG2D, granzyme B, and PD-1 increase blast cell lysis and have anti-leukemia action against K562 targets and AML cell lines (Boyiadzis et al., 2018).