Stimulation profile of CD4+ T lymphocytes cultured with the MDA-MB 231 tumor cell line. The experimental groups were composed of the empty pcDNA vector and lymphocytes cultured with MDA-MB 231 transfected with the E5, E6, and E7 genes. (A)—Differential count of CD4+ T lymphocytes. Differential (B) count of the CD25+ subset of CD4+ T lymphocytes and its suppressor expression profile by the presence of the intracellular molecule FOXP3+. (C–E) The presence of IFN-γ, IL-17, and IL-10 intracellular cytokines in CD4+ lymphocytes, respectively. ** p < 0.01, *** p < 0.001, **** p < 0.0001. Error bars: standard error between samples.