Knockdown of lncRNA RP11-626G11.3 inhibits proliferation and migration of human renal carcinoma cell lines through regulating miR-532-3p

Abstract

Objective To study the expression of long-chain non-coding RNA (lncRNA) RP11-626G11.3 in renal cancer tissues and cell lines, and to explore the effect of knockdown of RP11-626G11.3 on the biological behavior of renal cancer cells. Methods The GEPIA database was used to analyze the expression of RP11-626G11.3 in renal cancer tissues and adjacent tissues, and the TCGA database was used to analyze the relationship between the expression of RP11-626G11.3 and the survival time of renal cancer patients. The expression of RP11-626G11.3 in various renal cancer cell lines was detected by qPCR. The renal cancer cells with the highest expression of RP11-626G11.3 were selected and transfected with control plasmid (si-NC group) and RP11-626G11.3 silencing plasmid (si-RP11-626G11.3 group). Cell proliferation and migration were examined by MTT assay and cell scratch assay. The microRNA (miRNA) binding to RP11-626G11.3 was found by bioinformatics method, and verified by dual-luciferase reporter gene experiment. The expression of miR-532-3p in the two groups of cells was detected by qPCR. Western blot was used to detect the expression levels of Wnt/β-catenin signaling pathway in the two groups of cells. Results Compared with adjacent tissues, the expression of RP11-626G11.3 was up-regulated in renal cancer tissues (P＜0.01). Compared with patients with high expression of RP11-626G11.3, patients with low expression of RP11-626G11.3 had a longer survival time (P＜0.01). Compared with immortalized renal tubular epithelial cells, the expression of RP11-626G11.3 was up-regulated in renal cancer cell lines (P＜0.01), and the expression of RP11-626G11.3 was the highest in OS-RC-2 cells (P＜0.01). Compared with si-NC group, the viability of OS-RC-2 cells in si-RP11-626G11.3 group was significantly decreased (P＜0.05) with decreased cell migration rate(P＜0.01). RP11-626G11.3 was found to target at miR-532-3p (P＜0.01). Compared with the si-NC group, the expression of miR-532-3p in OS-RC-2 cells in the si-RP11-626G11.3 group was significantly up-regulated (P＜0.01), and the Wnt/β-catenin signaling pathway proteins β-catenin, Axin2, C-myc, cyclin D1 and MMP7 decreased. Conclusions The expression of RP11-626G11.3 is increased in renal cancer tissues and cell lines. Knockdown of RP11-626G11.3 inhibits the proliferation and migration of renal cancer cells by regulating the expression of miR-532-3p.

Keywords

• renal tumor|rp11-626g11.3|mir-532-3p|proliferation|migration