The unfolded protein response (UPR) has been established as a cell-intrinsic mechanism of survival for malignant cells facing microenvironmental stressors. Recent evidence indicates that the UPR also modulates antitumor immunity. Here, we discuss the bi-faced role of the UPR as it both promotes and antagonizes antitumor T-cell immunity.
Keywords: T cell immunity; antigen presentation; immune surveillance; tumor ploidy; tumor unfolded protein response.