CTLA4 and hepatocellular carcinoma: They reported that MAIT cells in HCC express higher levels of T‐cell activation markers (CD38, HLA‐DRA) and exhaustion markers (PD‐1, CTLA4, HAVCR2) but lower expression levels of effector function‐related genes such as CD160 and KLRG1, which is consistent with the findings of previous studies [232].