“…To date, TIM-3 has been found to be expressed on T cells (except for Th2 cells), and other immune cells, such as NK cells, macrophages, DCs, myeloid-derived suppressor cells, and mast cells. Moreover, TIM-3 is also expressed on certain malignant cells, such as melanoma [ 39 , 40 ], myeloid leukemia [ 41 ], non-small cell lung cancer (NSCLC) [ 42 ], prostate cancer [ 43 ], osteosarcoma [ 44 ], colon carcinoma [ 45 ], and hepatocellular carcinoma (HCC) cells [ 46 ]. When TIM-3 binds to a ligand, immune cell or adaptive immune cell maturation and activation is attenuated, which is beneficial to tumor cell proliferation and survival.…”