miR-219-5p靶向SOX5在口腔癌中的作用初探

Possible Roles of MiR-219-5p Targeting SOX5 in the Development of Oral Cancer

目的 研究miR-219-5p与SOX5在口腔鳞状细胞癌中是否存在差异性表达,并探讨miR-219-5p对SOX5的靶向调控作用,方法 运用口腔鳞状细胞癌细胞株SCC4及SCC9,人正常皮肤成纤维细胞系(HF)作为对照,对miR-219-5p与SOX5在个细胞系中的表达情况进行检测(RT-qPCR、Western blot);并在SCC4及SCC9细胞株中验证miR-219-5p对SOX5表达的靶向调控作用。结果 与正常人纤维细胞相比,miR-219-5p的表达水平显著降低,而SOX5的表达水平显著增加,差异有统计学意义(P <0.05);miR-219-5p与SOX5的表达水平具有负相关(P <0.05);在SCC4及SCC9细胞中,miR-219-5p通过结合3’非编码区(3’-UTR)靶向调控SOX5的表达。结论 miR-219-5p可能通过对SOX5的靶向调控参与了口腔鳞状细胞癌的发生发展,为协助临床预后评估和/或筛选治疗的新候选药物提供了科学依据。

Objectives To explore whether the expressions of miR-219-5p and/or SRY-related highmobility-group box 5(SOX5) in oral squamous cell carcinoma cells are differ from normal cells. We also aim to confirm the transcription regulation in SOX5 by miR-219-5p. Methods Human oral squamous cell lines SCC4 and SCC9 were employed. The expression levels of miR-219-5p and SOX5 were detected in cancer cells(indicated by RT-qPCR and Western blot). Genetic analysis and luciferase assay were employed to verify whether miR-219-5p targets SOX5 by binding to the specific region of 3’-UTR. Results Our data showed that high miR-219-5p and low SOX5 levels were detected in vitro SCC4 and SCC9 cells(P < 0.05). miR-219-5p was negatively correlated with SOX5 expression. Genetic analysis and luciferase assay revealed that miR-291-5p regulated SOX5 expression by targeting the 3’untranslated region(3’-UTR) of the SOX5 mRNA. Conclusions This study demonstrates that miR-219-5p is involved in the development and prognosis of oral cancer by targeting the expression of SOX5,and can be a novel candidate for clinical prognosis and/or therapy.