Long non-coding RNA (lncRNA) LINC00514 is a cancer-related lncRNA that has been proven to be implicated in the progression of several cancers. However, the biological function of LINC00514 in cervical squamous cell carcinoma (CSCC) remains unclear. Thus, we aimed to identify the LINC00514 expression profile in CSCC and determine its exact mechanism. Our results showed that the expression of LINC00514 was up-regulated in human CSCC tissues and cell lines. Knockdown of LINC00514 significantly inhibited the proliferation and invasion of CSCC cells, as well as suppressed tumorigenesis of CSCC in vivo. In addition, LINC00514 was found to work as a miRNA sponge for miR-708-5p and suppressed the expression of miR-708-5p in CSCC cells. Homeobox B3 (HOXB3) was found to be a target gene of miR-708-5p. Rescue assays demonstrated that miR-708-5p inhibitor attenuated the effects of LINC00514 knockdown on cell proliferation and invasion in CSCC cells. In addition, overexpression of HOXB3 reversed the inhibitory effects of miR-708-5p mimics on cell proliferation and invasion. Taken together, our findings for the first time elucidated that lncRNA LINC00514 promotes the proliferation and invasion through the miR-708-5p/HOXB3 axis in CSCC. Thus, LINC00514/miR-708-5p/HOXB3 axis might be a promising therapeutic target for the treatment of CSCC.
Keywords: HOXB3; LINC00514; cervical squamous cell carcinoma; long non-coding RNA (lncRNA); miR-708-5p.
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