IL2 and cancer: Molecular analysis revealed in MCF7 and in T24 cells the significant upregulation of cell cycle regulator p21 (CDK inhibitor 1), an inhibitor of cyclin-dependent kinases essential for the control of the cell cycle in mammals, which amongst other functions, suppresses cancer growth when co-incubated with IL-2/IL-12/IL-18-stimulated γδ T cells, regardless of activation via IMMU510 on effector cells.