MicroRNA-4513 Promotes Gastric Cancer Cell Proliferation and Epithelial–Mesenchymal Transition Through Targeting KAT6B

The purpose of this study was to investigate the expression level of microRNA-4513 (miR-4513) in gastric cancer (GC), and to elucidate the mechanisms underlying its regulation of GC progression. Quantitative real-time PCR (qRT-PCR) was performed to measure the expression level of miR-4513 in GC cells. Transfection efficacy of synthetic miRNAs was examined by qRT-PCR. After synthetic miRNA transfection, cell counting kit-8 assay and transwell invasion assay were conducted to measure biological changes in these groups. The key molecular expression level involved in epithelial–mesenchymal transition (EMT) was analyzed by Western blot. Bioinformatic analysis and Western blot were performed to investigate the connection between miR-4513 and lysine acetyltransferase 6B (KAT6B). qRT-PCR results showed that miR-4513 expression level was upregulated in GC cell lines. Downregulation of miR-4513 expression inhibited GC cell proliferation, invasion, and EMT. KAT6B was validated as a direct target of miR-4513. In addition, KAT6B expression level can be upregulated by miR-4513 inhibitor. Collectively, we showed that miR-4513 is involved in regulating the biological function of GC cells via KAT6B. In addition, miR-4513 may serve as a potential target for the molecular therapy of GC.