Figure 3. CTL assay with luciferase-expressing tumor cells using T cells from the various vaccinated mice groups.
Splenocytes from immunized mice were harvested as previously described in Figure 2 and stimulated with E6 peptide (aa49-57) for 120hr, then added in several effector:target ratios to TC-1/Luciferase target cells previously plated in 96-well plates. Following 8hr incubation, media was drawn from the wells, briefly centrifuged, and quantitatively assayed for luciferase activity using the Steady-Glo reagent (Promega, Madison, WI). Visualization and quantitation was performed using Xenogen IVIS system and Living Image software package (Xenogen Corp., Alameda, CA) as a readout for target cell lysis (*p<0.001).