IFNG and neoplasm: Furthermore, increased IFNγ production from post-REP TILs against autologous primary tumor cells was decreased by addition of anti-MHC I blocking antibody but not by addition of anti-MHC II blocking antibody (Supplementary Figure 4), indicating that the response of the TILs to autologous tumor cells is MHC I-restricted, but not MHC II-restricted.