Long non-coding RNA ERVK13-1 aggravates osteosarcoma through the involvement of microRNA-873-5p/KLF5 axis

Abstract

Objective: To explore the effect and mechanism of long noncoding RNA ERVK13-1 on osteosarcoma (OS) cell development by regulation of miR-873-5p/KLF5 axis. Methods: The expression of ERVK13-1 in the collected tissue was detected by RT-qPCR, and then the relationship between ERVK13-1 expression and clinical characteristics of OS patients was analyzed. After OS cell lines were transfected with miR-873-5p inhibitor, si-ERVK13-1, si-KLF5 or their negative controls, the expression of ERVK13-1, miR-873-5p, and KLF5 in OS cell lines were measured, followed by determination of their effects on cell proliferation, migration, and invasion abilities. Moreover, the binding relationships of ERVK13-1 and miR-873-5p, as well as miR-873-5p and KLF5, were verified by the dual-luciferase reporter gene assay. Results: Highly expressed ERVK13-1 was found in OS tissues, which was closely related to tumor size, tumor node metastasis, and distant metastasis. The overall survival of OS patients with high expression of ERVK13-1 was poorer than those with low expression of ERVK13-1. Elevated ERVK13-1 and KLF5 but suppressed miR-873-5p was observed in the OS cell lines U2OS and MG63. Transfection with miR-873-5p inhibitor enhanced the malignant potentials of OS cells, and transfection with si-ERVK13-1 or si-KLF5 reduced these abilities of OS cells. ERVK13-1 bound to miR-873-5p and KLF5 was a target gene of miR-873-5p. Conclusion: The ERVK13-1/miR-873-5p/KLF5 axis confers vital effect on the occurrence and progression of OS, thus providing possible guidance for the clinical treatment of OS.

Identification of lncRNAs Deregulated in Epithelial Ovarian Cancer Based on a Gene Expression Profiling Meta-Analysis

“…GLIDR is upregulated and promotes glioma [ 77 ], lung [ 78 ], and prostate [ 79 ] cancers by acting as competing endogenous RNAs for miRNAs. ERVK13-3 is upregulated in osteosarcoma [ 80 ].…”

ERVK13-1/miR-873-5p/GNMT Axis Promotes Metastatic Potential in Human Bladder Cancer though Sarcosine Production

“…Regarding the effect of lncRNA on miRNA, we have also reported that sponging of miRNA-494 by HOXA11-AS enhances the expression of nicotinamide adenine dinucleotide (NAD)(P)H: quinone oxidoreductase 1 [13]. ERVK13-1 suppresses miR-873-5p by sponging it, promoting the expression of its target gene KLF5 and enhancing malignant phenotypes in osteosarcoma [21]. In our study, KLF5 expression was not altered by miR-873-5p mimics and inhibitors or ERVK13-1 knockdown in BUC cell lines.…”

“…Additionally, we examined the expression of three lncRNAs reported to regulate miR-873-5p, namely, ERVK13-1 [21], MALAT1 [22], and DDX11-AS1 [23,24]. The expression of ERVK13-1 was 5 times higher in T24 cells than in RT4 cells.…”