Dual Targeting of CTLA-4 and CD47 on T_reg Cells Promotes Immunity against Solid Tumors

The authors found that anti–cytotoxic T lymphocyte–associated protein 4 (CTLA-4)×SIRPα preferentially depleted ICOShigh immunosuppressive Treg cells in the tumor microenvironment and enhanced immunity against solid tumors, including MC38 and CT26 murine colon cancers.