DPP7 and colorectal cancer: Conversely, dipeptidyl peptidase 7 (DPP7) promotes colorectal cancer progression by binding glutathione peroxidase 4 (GPX4), stabilising this redox guardian to suppress cytoskeletal disulfide aggregation (e.g., in drebrin, FLNA/B) and evade NK cell cytotoxicity [33].