Antitumor effect of Ad-ΔB7/IL12/GMCSF in combination with dendritic cell (DCs). (a) Pre-established B16-F10 tumor was injected with phosphate-buffered saline (PBS) (open diamonds), DCs (open squares), Ad-ΔB7/IL12/GMCSF (filled triangles), Ad-ΔB7/IL12/GMCSF plus DCs (filled squares), or Ad-ΔB7/IL12/GMCSF (H; high-dose of Ad) plus DCs (filled diamonds). Tumor growth was monitored every day. (b) Survival percentage of tumor-bearing mice following treatment with Ad-ΔB7/IL12/GMCSF and/or DCs. Tumor size over 3,000 mm3 was regarded as death. Data points represent the mean ± SE. All results in this figure represent results of at least seven mice per group. *P < 0.05. GM-CSF, granulocyte-macrophage colony-stimulating factor; IL, interleukin.