Dendritic cells (DCs) were generated in accordance with our previous work.20 (link) Briefly, bone marrow mononuclear cells were obtained from bone marrow cells after removal of the femurs and tibias of female C3H/HeJ mice. Bone marrow mononuclear cells (1×106/well) were cultured in complete Roswell Park Memorial Institute 1640 medium with 10% fetal bovine serum (Life Technologies, Breda, Netherlands), 10 ng/mL murine granulocyte-macrophage colony-stimulating factor (GM-CSF; eBioscience, San Diego, CA, USA), and 1 ng/mL murine IL-4 (eBioscience) for 5 days. Half the medium with GM-CSF and IL-4 was gently replaced on days 2 and day 4. SCC7, a murine head and neck carcinoma cell line, was cultured in Dulbecco’s Modified Eagle’s Medium supplemented with 10% fetal bovine serum, 2 mM L-glutamine, 100 units/mL penicillin, and 100 mg/mL streptomycin (Invitrogen, Grand Island, NY, USA).