Flow cytometry data demonstrated the pronounced increase in the percentage of CD69+ cells in both CD4+ Th (p < 0.002) and CD8+ T-cells (p < 0.002) and moderate increase in the percentage of CD25+ among CD4+ Th cells (p < 0.03) in all tumor-bearing mice in comparison with “Control” group. This evidence concerns the gene IL2RA and neoplasm.