IL2 and neoplasm: It can imply that both higher expression of FoxP3 protein and stronger inhibitory activity of these cells in tumor microenvironment, since upregulated expression of FoxP3, correlated with decreased level of proinflammatory cytokines, like tumor necrosis factor (TNF), IL-2, or granulocyte-macrophage colony-stimulating factor (GM-CSF), and on the other hand with increased expression of immunosuppressive cytokines, like IL-10 or TGF-β [45].