I am having some issues with inducing T cell proliferation in an MLR assay. I am loading BMDCs with tumor lysate then maturing them with LPS and then co-culturing them with splenocytes from a primed mouse.
Would the presence FBS in media affect the loading of antigens onto DCs? I have a unpulsed DC control, and it is causing some T-cell proliferation and it is not enhanced with DCs that are loaded with tumor antigen.