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We focused on studying the effects of a key miRNA-mRNA axis in bladder urothelial carcinoma (BUC). Firstly, miRNAs and mRNAs differentially expressed in BUC were analyzed. Clinical information in the TCGA database was used for survival analysis, and the regulator of miRNA-93-5p was predicted. miRNA-93-5p and KLF9 mRNA expression were detected by qRT-PCR. Protein level detection and targeting measurement were, respectively, achieved by western blot and dual-luciferase approaches. The proliferative, invasive, and migratory abilities were tested through CCK-8, Transwell, and wound healing methods. Cell apoptosis in each group was detected through flow cytometry. As discovered, miRNA-93-5p level was markedly high in BUC cells while KLF9 expression was remarkably low. miRNA-93-5p overexpression promoted BUC cell abilities. Besides, miRNA-93-5p inhibited KLF9 expression. Furthermore, KLF9 overexpression dramatically attenuated such promotion on cancer cell abilities. On the whole, miRNA-93-5p/KLF9 axis facilitated BUC progression, offering a new potential target for BUC patients.

Overexpression of miRNA-93-5p Promotes Proliferation and Migration of Bladder Urothelial Carcinoma via Inhibition of KLF9