For example, stimulation of NK cells with a combination of IL-15, IL-12, and IL-18 before the adoptive transfer has demonstrated promising results: it was shown that ex vivo cytokine-treated NK cells persisted longer and reminded cytokine-induced memory-like (CIML) NK cells of their adaptive-like properties characterized by increased IFN-γ production and cytotoxicity against leukemia and lymphoma cells [154,155]. This evidence concerns the gene IL15 and lymphoma.