Regarding literature review and our results as well, it is clear that in comparison to tumor lysate alone, PLGA-NP mediated breast tumor antigen delivery to DCs did not result in significant differences in either IFN-γ or IL-4 production as well as immune response polarization, but in the case of PLGA-NP mediated antigen delivery when the tumor lysate is delivered via PLGA-NP lower amounts of antigen is significantly required to elicit same magnetitude of immune responses. The gene discussed is IL4; the disease is breast neoplasm.