Figure. Left - BALB/c mice were injected with RENCA tumor cells (100.000 cells i.v) and treated with bortezomib (5ug/mouse i.v) on days 5, 12 and 19 followed by injection of sygeneric NK cells (2×106 i.v) on days 6,13 and 20. All animals received IL-2 (100.000 U i.p on days 6–9,13–16 and 20–23). Animals were euthanized on day 25 and evaluated for pulmonary metastasies. Right - C57BL/6 mice were injected with LLC1 tumor cells (500.000 s.c) and treated with bortezomib (15ug/mouse i.p) on day 14 followed by a single injection of syngeneic NK cells (1×106 i.v) on day 15. All mice were treated with IL-2 (100.000U i.p on days 15–18). Data depicts tumor sizes on day 28 post tumor injection.