Abstract:
OBJECTIVE:Previous studies have demonstrated that long non-coding ribonucleic acid (lncRNA) FEZF1-AS1 acts as a cancer-promoting gene. However, no reports have investigated the role of FEZF1-AS1 in oral squamous cell carcinoma (OSCC) yet. Therefore, the aim of this study was to explore whether FEZF1-AS1 promoted the expression characteristics of OSCC by targeting miR-196a and to further elucidate the underlying mechanism of FEZF1-AS1 in promoting the metastasis of OSCC. PATIENTS AND METHODS:The expression levels of FEZF1-AS1 and miR-196a in 42 pairs of OSCC tissues and para-carcinoma tissues were detected via quantitative Real Time-Polymerase Chain Reaction (qRT-PCR). The correlation of FEZF1-AS1 expression with clinical indexes and prognosis of OSCC patients was analyzed. Moreover, the expression levels of FEZF1-AS1 and miR-196a in OSCC cells were detected via qRT-PCR. FEZF1-AS1 knockdown and miR-196a over-expression models were established using lentivirus transfection in OSCC cell lines (CAL-27 and Tca8113). Subsequently, the influences of FEZF1-AS1 and miR-196a on the biological functions of OSCC cells were analyzed via Cell Counting Kit-8 (CCK-8) assay, colony formation assay and 5-Ethynyl-2'-deoxyuridine (EdU) assay, respectively. Furthermore, the potential mechanism was explored using the Luciferase reporter gene and recovery assays. RESULTS:The results of qRT-PCR proved that the expression level of FEZF1-AS1 in OSCC tissues was significantly higher than that of para-carcinoma tissues, and the difference was statistically significant. The pathological stage was significantly higher in patients with high-expression FEZF1-AS1 than those with low-expression FEZF1-AS1, while the overall survival rate was remarkably lower. The proliferation ability of cells in FEZF1-AS1 silencing group declined significantly when compared with the NC group. Similarly, qRT-PCR results verified that the expression of miR-196a in OSCC cell lines and tissues was significantly reduced as well. Meanwhile, the miR-196a expression was negatively correlated with FEZF1-AS1. Subsequent Luciferase reporter gene assay confirmed that overexpression of miR-196a could markedly reduce the activity of Luciferase containing wild-type FEZF1-AS1 vector rather than decrease the activity of Luciferase containing mutant-type vector or empty vector. These findings further indicated that FEZF1-AS1 could be targeted by miR-196a through this binding site. In addition, recovery assay demonstrates that there was a mutual regulatory effect between FEZF1-AS1 and miR-196a, jointly affecting the malignant progression of OSCC. CONCLUSIONS:The expression of lncRNA FEZF1-AS1 was markedly up-regulated in OSCC, which was significantly correlated with pathological stage and poor prognosis of OSCC patients. Therefore, it was believed that FEZF1-AS1 might promote the malignant progression of OSCC by regulating miR-196a.
journal_name
Eur Rev Med Pharmacol Scijournal_title
European review for medical and pharmacological sciencesauthors
Xu L,Hou TJ,Yang Pdoi
10.26355/eurrev_201908_18534subject
Has Abstractpub_date
2019-08-01 00:00:00pages
6505-6515issue
15eissn
1128-3602issn
2284-0729journal_volume
23pub_type
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journal_title:European review for medical and pharmacological sciences
pub_type: 杂志文章,随机对照试验
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