Figure 1.

Killing of colon carcinoma cells by IL-2 -activated NK cells and CD8+T cells. Freshly isolated NK cells (Figure  1a-d) and CD8+ T cells (Figure  1e) were cultured with IL-2 (100 U/ml) for one week and used as effector (E) cells in 4-h ⁵¹Cr release assays performed on the HT29 (1a), SW480, (1b) Colo32 (1c), and Lovo (1d) cell lines. NK-cell-mediated cell lysis was measured at the indicated E:T ratio. Data are means (with SD bars) of triplicates performed with NK cells from one donor. They are representative of independent experiments performed with material from three different donors.