Innate Immune Regulation and Cancer ImmunotherapyInnate and adaptive immunity play important roles in immunosurveillance and tumor destruction. However, increasing evidence suggests that tumor infiltrating immune cells may have a dual function: inhibiting or promoting tumor growth and progression. Although regulatory T (Treg) cells induce immune tolerance by suppressing host immune responses against self or non self antigens, thus playing critical roles in preventing autoimmune diseases, they might