Zuo38 et al.’s study demostrated that miR-34a-5p negatively regulated the expression of PD-L1 by targeting its 3′-untranslated region and miR-34a-5p/PD-L1 axis regulated cis-diamminedichloroplatinum (DDP) chemoresistance of ovarian cancer cells. This evidence concerns the gene CD274 and ovarian carcinoma.