CD274 and cancer: Several other miRNAs have been implicated in regulating PD-L1 in various cancer types, including miR-138-5p, miR-513, miR-570, miR-34a, and miR-200 (Chen et al., 2016; Deng et al., 2023; Song N. et al., 2020; Zhao et al., 2016; Chen et al., 2014; Kishta et al., 2025).