PMID- 31565549 OWN - NLM STAT- PubMed-not-MEDLINE LR - 20231014 IS - 2167-8359 (Print) IS - 2167-8359 (Electronic) IS - 2167-8359 (Linking) VI - 7 DP - 2019 TI - lncRNA TMEM51-AS1 and RUSC1-AS1 function as ceRNAs for induction of laryngeal squamous cell carcinoma and prediction of prognosis. PG - e7456 LID - 10.7717/peerj.7456 [doi] LID - e7456 AB - BACKGROUND: Long non-coding RNAs (lncRNAs) can function as competing endogenous RNAs (ceRNAs) to interact with miRNAs to regulate target genes and promote cancer initiation and progression. The expression of lncRNAs and miRNAs can be epigenetically regulated. The goal of this study was to construct an lncRNA-miRNA-mRNA ceRNA network in laryngeal squamous cell carcinoma (LSCC) and reveal their methylation patterns, which was not investigated previously. METHODS: Microarray datasets available from the Gene Expression Omnibus database were used to identify differentially expressed lncRNAs (DELs), miRNAs (DEMs), and genes (DEGs) between LSCC and controls, which were then overlapped with differentially methylated regions (DMRs). The ceRNA network was established by screening the interaction relationships between miRNAs and lncRNAs/mRNAs by corresponding databases. TCGA database was used to identify prognostic biomarkers. RESULTS: Five DELs (downregulated: TMEM51-AS1, SND1-IT1; upregulated: HCP5, RUSC1-AS1, LINC00324) and no DEMs were overlapped with the DMRs, but only a negative relationship occurred in the expression and methylation level of TMEM51-AS1. Five DELs could interact with 11 DEMs to regulate 242 DEGs, which was used to construct the ceRNA network, including TMEM51-AS1-miR-106b-SNX21/ TRAPPC10, LINC00324/RUSC1-AS1-miR-16-SPRY4/MICAL2/ SLC39A14, RUSC1-AS1-miR-10-SCG5 and RUSC1-AS1-miR-7-ZFP1 ceRNAs axes. Univariate Cox regression analysis showed RUSC1-AS1 and SNX21 were associated with overall survival (OS); LINC00324, miR-7 and ZFP1 correlated with recurrence-free survival (RFS); miR-16, miR-10, SCG5, SPRY4, MICAL2 and SLC39A14 were both OS and RFS-related. Furthermore, TRAPPC10 and SLC39A14 were identified as independent OS prognostic factors by multivariate Cox regression analysis. CONCLUSION: DNA methylation-mediated TMEM51-AS1 and non-methylation-mediated RUSC1-AS1 may function as ceRNAs for induction of LSCC. They and their ceRNA axis genes (particularly TMEM51-AS1-miR-106b-TRAPPC10; RUSC1-AS1-miR-16-SLC39A14) may be potentially important prognostic biomarkers for LSCC. CI - (c)2019 Hui et al. FAU - Hui, Lian AU - Hui L AD - Department of Otolaryngology, the First Hospital of China Medical University, Shenyang, Liaoning Province, China. FAU - Wang, Jing AU - Wang J AD - Department of Otolaryngology, the First Hospital of China Medical University, Shenyang, Liaoning Province, China. FAU - Zhang, Jialiang AU - Zhang J AD - Department of Otolaryngology, the First Hospital of China Medical University, Shenyang, Liaoning Province, China. FAU - Long, Jin AU - Long J AD - Department of General Surgery, the First Hospital of China Medical University, Shenyang, Liaoning Province, China. LA - eng PT - Journal Article DEP - 20190910 PL - United States TA - PeerJ JT - PeerJ JID - 101603425 PMC - PMC6743450 OTO - NOTNLM OT - Competing endogenous RNAs OT - Laryngeal squamous cell carcinoma OT - Long non-coding RNAs OT - Micrornas OT - Prognosis COIS- The authors declare there are no competing interests. EDAT- 2019/10/01 06:00 MHDA- 2019/10/01 06:01 PMCR- 2019/09/10 CRDT- 2019/10/01 06:00 PHST- 2019/03/11 00:00 [received] PHST- 2019/07/10 00:00 [accepted] PHST- 2019/10/01 06:00 [entrez] PHST- 2019/10/01 06:00 [pubmed] PHST- 2019/10/01 06:01 [medline] PHST- 2019/09/10 00:00 [pmc-release] AID - 7456 [pii] AID - 10.7717/peerj.7456 [doi] PST - epublish SO - PeerJ. 2019 Sep 10;7:e7456. doi: 10.7717/peerj.7456. eCollection 2019.