the conclusion that natural killer ( nk ) cells are activated that lyse the syngeneic tumor cells derives from findings that 1 ) treatment of the allostimulated balb/c effector cells with anti-theta serum and complement does not ablate cytotoxicity against syngeneic mksa tumor cells and 2 ) allostimulation of congenitally athymic ( nu/nu ) balb/c mice results in significant cytotoxicity against mksa tumor cells but not against allogeneic target cells .
C0229671
serum
C0009498
complement