Figure 5.
Newcastle disease virus (NDV) combination therapy in immunocompetent BALB/c mice. Ten mice per group were subcutaneously implanted with 5 × 105 CT26.CL25 cells. When tumors reached a size of 5–8 mm in diameter, mice were intratumorally treated with phosphate-buffered saline (PBS), 1 × 107 plaque forming units of NDV/F3aa-GFP, NDV/F3aa-minigal, NDV/F3aa-minigal + NDV/F3aa-GFP, NDV/F3aa-GFP + NDV/F3aa-IL-2, or NDV/F3aa-minigal + NDV/F3aa-IL-2 every 2 days for a total of four injections. (a) Tumor volumes were monitored every 2 days during experimental period. (b) Percentage of complete regressions per treatment group is indicated. Surviving mice were challenged with CT26.CL25 60 days post-treatment initiation and percentage protection is also shown. GFP, green fluorescent protein.