Identification of miR‑195‑3p as an oncogene in RCC

There is increasing evidence that the deregulation of microRNAs (miRNAs; miRs) contributes to tumorigenesis. Previous studies have shown that miR‑195 is downregulated in various types of cancer. The present study aimed to investigate the function and expression levels of miR‑125b. Results of qPCR revealed that miR‑195‑3p, the mature sequence of miR‑195, was upregulated in renal cell carcinoma (RCC) tissues and cell lines (786‑O, 769P and ACHN). This indicated that the function and role of miR‑195‑3p may differ in different types of tumor. To assess the function of miR‑195‑3p in RCC cell lines, cell proliferation was examined using MTT and CCK‑8 assays, mobility was assessed using a cell scratch assay, Transwell migration assay and invasion assay, and apoptosis was examined using flow cytometry. These assessments were also performed in cells with upregulated or downregulated miR‑195‑3p via transfection with synthesized miR‑195‑3p mimic or inhibitor. The results revealed that the overexpression of miR‑195‑3p promoted 786‑O and ACHN RCC cell proliferation, migration and invasion, and inhibited cell apoptosis, whereas the downregulation of miR‑195‑3p suppressed cell proliferation, migration and invasion, and induced cell apoptosis. These results indicated that miR‑195‑3p was associated with the tumorigenesis of RCC, with further investigations to focus on the pathway and use of miR‑195‑3p as a clinical biomarker for RCC.