CTLs generated from immunized mice are equally efficient in killing A20 tumor cells.

Cytotoxic activity was evaluated after 5 days of in vitro restimulation of total spleen cells with irradiated A20 cells, as described. A20 cells represent target cells. Vaccine formulation is indicated. The percentage of lysis of BALB/c blasts as negative controls was below 10% in each experimental group. Data shown are representative of the results obtained from 3 mice for each group, analyzed individually.