lncRNA SNHG10 promotes the invasion and migration of colorectal cancer SW620 cells by targeting miR-532-3p / 中国肿瘤生物治疗杂志

ABSTRACT

@#[Abstract] Objective: To investigate the expression of long non-coding RNA (lncRNA) small nucleolar RNA host gene 10 (SNHG10) in colorectal cancer tissues and cells and its effect on the invasion and migration of colorectal cancer cells and the underlying mechanism. Methods: From January 2018 to December 2019, 78 pairs of colorectal cancer tissue and para-cancerous tissues from the patients who had radical colorectal cancer resection in Henan Provincial People's Hospital were collected. Quantitative PCR (qPCR) was performed to quantify the levels of lncRNA SNHG10 and miR-532-3p in colorectal cancer tissues, colorectal cancer cell lines (SW480, SW620, HT-29 and LoVo) and human normal colorectal mucosal FHC cells; and their correlations with the clinicopathological features of colorectal cancer patients were further analyzed. Dual-luciferase reporter gene assay was used to validate the targeted relationship between lncRNA SNHG10 and miR-532-3p. After transfection with si-SNHG10 or miR-532-3p mimic or co-transfection of si-SNHG10 and miR-532-3p inhibitor, the invasion and migration of SW620 cells were detected by Transwell assay, and the protein expression of E-cadherin, N-cadherin and vimentin were detected by WB. Results: SNHG10 was highly expressed in colorectal cancer tissues and cells (all P<0.05), and its expression was related to TNM stage and distant metastasis (all P<0.05). miR-532-3p was lowly expressed in colorectal cancer tissues and cells, and its expression was correlated with TNM stage, lymphonode metastasis and distant metastasis (all P<0.05). The expression of SNHG10 and miR-532-3p in colorectal cancer tissues was negatively correlated (r=-0.225, P=0.048). Dual-luciferase reporter gene assay confirmed that SNHG10 targetedly regulated miR-532-3p. Both down-regulation of SNHG10 and up-regulation of miR-532-3p significantly inhibited the invasion and migration of SW620 cells (all P<0.05), up-regulated the expression of E-cadherin (P<0.05), while down-regulated the expression of N-cadherin and vimentin (all P<0.05). After transfection with miR-532-3p inhibitor, the inhibitory effect of knocking down the expression of lncRNA SNHG10 on the invasion and migration of colorectal cancer cells was reversed (all P<0.05). Conclusions: LncRNA SNHG10 is highly expressed in colorectal cancer and is associated with TNM stage and distant metastasis. LncRNA SNHG10 affects the invasion and metastasis of colorectal cancer cells by targeting miR-532-3p and regulating EMT.