We then measured costimulatory molecule expression on dendritic cells (DCs) from tumor-draining lymph nodes following r3LCMV treatment, and we observed a significant increase in CD80 (B7.1) and CD86 (B7.2) molecule expression in mice that received r3LCMV treatment (Figure 3F), suggesting a role for B7 costimulation. The gene discussed is CD80; the disease is neoplasm.