Possible Roles of MiR-219-5p Targeting SOX5 in the Development of Oral Cancer
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摘要:
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。 -
关键词:
- 口腔癌细胞 /
- miR-219-5p /
- SOX5 /
- 靶向调控
Abstract:Objectives To explore whether the expressions of miR-219-5p and / or SRY-related high-mobility-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. -
Key words:
- Oral cancer cells /
- miR-219-5p /
- SOX5 /
- Target regulation
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图 2 miR-219-5p靶向3’-UTR特异性序列调控SOX5
A:miRMine预测人SOX5 mRNA序列中miR-219-5p可能的结合位点,红色标注的为miR-219-5p与SOX5 mRNA靶向结合的潜在位点;B:根据预测结果设计的miR-219-5p与SOX5 mRNA靶向结合潜在位点的突变序列(黄色标示);3’UTR,3’非编码区;C:SCC4细胞的双荧光素酶报告实验结果;D:SCC9细胞的双荧光素酶报告实验结果。SOX5 3'UTR-wt,SOX5 3'UTR结合位点野生型组(未突变组);SOX5 3'UTR-mut,SOX5 3'UTR结合位点突变组;miR-NC,miR-219-5p空白对照剂转染;miR-219-5p,miR-219-5p转染。
Figure 2. miR-219-5p regulates SOX5 by binding to specific sites in 3’-UTR
图 3 在口腔癌细胞SCC4及SCC9中miR-219-5p靶向调控SOX5的表达
A:miR-219-5p在SCC4细胞中对SOX5 mRNA水平的表达调控; B:miR-219-5p在SCC9细胞中对SOX5 mRNA水平的表达调控;C:miR-219-5p在SCC4细胞中对SOX5蛋白水平的表达调控,上方为Western blot检测的蛋白印迹图,GAPDH为内对照,下方SOX5蛋白水平的定量统计直方图;D:miR-219-5p在SCC9细胞中对SOX5蛋白水平的表达调控,上方为Western blot检测的蛋白印迹图,GAPDH为内对照,下方SOX5蛋白水平的定量统计直方图。
Figure 3. miR-219-5p regulates the expression of SOX5 in SCC4 and SCC9
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