ZnONP nanocomposites were also shown to induce tumor cells killing capacities of peripheral blood lymphocytes increasing the production of anti-tumor cytokines IFN-γ, IL-2 and TNF-α which further led to the killing of tumor cells and inhibition of tumor growth and enhanced the expression of CD3, CD8, and CD56 [77–80]. The gene discussed is CD8A; the disease is neoplasm.