Abstract: Provided herein are immune cells and methods of use, wherein the immune cells include a chimeric antigen receptor (CAR), wherein the CAR comprises an extracellular antigen binding domain that binds specifically to a first epitope; and an inhibitory chimeric antigen receptor (iCAR), wherein the iCAR comprises an extracellular antigen binding domain that binds specifically to a second epitope, wherein the immune cell is activated when the immune cells binds to the first epitope and does not bind to the second epitope; and wherein the immune cell is inactivated when the immune cell binds to the first and second epitopes.

Abstract: This document relates to methods and materials for treating T cell cancers. For example, a composition containing one or more bispecific molecules can be administered to a mammal having a T cell cancer to treat the mammal. For example, methods and materials for using one or more bispecific molecules to treat a mammal having a T cell cancer are provided.