摘要
目的研究Micro RNA-203对人下咽癌细胞迁移能力的影响及作用机理。方法利用生物信息学方法预测Micro RNA-203的下游调控靶分子,利用荧光素酶报告基因实验、q RT-PCR、与Westenr blot等方法对其中与调节细胞迁移有关的靶分子MEKK1进行验证,证实下咽癌细胞中MEKK1的表达是否受Micro RNA-203的影响。通过细胞迁移实验研究Micro RNA-203对下咽癌细胞迁移能力的影响,进一步阐明可能影响下咽癌转移能力的因素。结果在过表达Micro RNA-203的下咽癌细胞中,Westenr blot检测靶基因蛋白表达量分析、q RT-PCR检测靶基因m RNA表达量和双荧光素酶报告基因实验结果均提示Micro RNA-203下调靶基因MEKK1的表达。细胞迁移实验证明过表达Micro RNA-203可显著抑制下咽癌细胞的迁移能力。结论 MEKK1是Micro RNA-203的直接下游作用靶点,Micro RNA-203有可能通过负向调控MEKK1抑制下咽癌细胞的转移能力。
Objective To determine the roles and underlying molecular mechanism of MicroRNA-203 on the migration of human hypo-pharyngeal carcinoma cells. Methods The potential MicroRNA-203 target genes were searched by bioinformatic miRNA target prediction tools and KEGG database,and a large number of candidates was identified. The MEKK1 was selected for further investigation. This gene is known to play a role in tumor metastasis. The MicroRNA-203’s binding sites in MEKK1’s mRNA 3’UTR were analyzed by luciferase report-er assays. Nextly,the protein expression of MEKK1 in Fadu-Lv-MicroRNA-203 cells was determined by Western blot assay. The regulation of MEKK1’s mRNA expression by MicroRNA-203 was analyzed by qRT-PCR. Transwell cell migration assays were performed to confirm the im-pact of MicroRNA-203 on hypopharyngeal carcinoma metastasis. Results The expression level of endogenous MicroRNA-203 was negatively correlated with the mRNA and protein expression levels of MEKK1 in hypopharyngeal carcinoma cells. Transwell migration assay results showed that MicroRNA-203 overexpression inhibited hypopharyngeal carcinoma cell migration ability. Furtherly,MEKK1 can promote hypo-pharyngeal carcinoma cell migration ability. Conclusion MEKK1 is a direct target of MicroRNA-203. MicroRNA-203 plays a role in hypo-pharyngeal carcinoma cell migration ability through MEKK1.
出处
《局解手术学杂志》
2015年第3期241-244,共4页
Journal of Regional Anatomy and Operative Surgery
基金
国家自然科学基金青年基金(81202138)