Upon activations, NK cells are also capable of producing a number of different cytokines/chemokines (such as IFN-γ, TNF-α, GM-CSF, MIP-1α, MIP-1β, CCL5, and RANTES) that either activate or help recruit other cell types to the tissues to shape anti-tumor or anti-microbial responses (5–8). This evidence concerns the gene CCL5 and neoplasm.