PMID- 27555783 OWN - NLM STAT- PubMed-not-MEDLINE DCOM- 20160824 LR - 20211109 IS - 1178-6930 (Print) IS - 1178-6930 (Electronic) IS - 1178-6930 (Linking) VI - 9 DP - 2016 TI - miR-203 is involved in the laryngeal carcinoma pathogenesis via targeting VEGFA and Cox-2. PG - 4629-37 LID - 10.2147/OTT.S96053 [doi] AB - The development of laryngeal squamous cell carcinoma (LSCC) is a multistep process involving multiple factors. MicroRNAs, a group of important negative regulators of gene expression, have also been confirmed to be involved in the LSCC pathogenesis. In the present study, we compared the expression of nine selected microRNAs in the LSCC tissues and adjacent nontumor tissues. We found that the expression of miR-203 was significantly reduced in the LSCC tissues. Predicted by using bioinformatics tools, we found that VEGFA and cyclooxygenase-2 (Cox-2) may be direct targets of miR-203. By subsequent determination through dual-luciferase assay and Western blot, we confirmed that miR-203 suppresses the expression of VEGFA and Cox-2 by directly targeting 3'-untranslated region. Meanwhile, by analyzing the relationship between miR-203 and VEGFA in clinical tissue samples, we found that a negative correlation existed in the expression of miR-203 and VEGFA (P=0.0096, r=-0.33). Similarly, the expression of miR-203 and Cox-2 also has a negative correlation (P=0.0019, r=-0.46). Subsequently, in vitro functional study indicated that miR-203 played as a tumor suppressor by repressing proliferation, migration, and invasion of Hep-2 cells. The overexpression of VEGFA partially rescued the effect of overexpressed miR-203. Overexpressed Cox-2 partially rescued the effect of miR-203 on Hep-2 cell proliferation but not on the cell migration and invasion capacity. These findings suggest that miR-203 plays as a tumor suppressor in LSCC, partially by regulating VEGFA and Cox-2, and may serve as a potential target for therapeutic intervention. FAU - Xu, Lin AU - Xu L AD - Department of Otolaryngology, Second Affiliated Hospital of Zhejiang University Medical College, Hangzhou. FAU - Shen, Bin AU - Shen B AD - Department of Otolaryngology-Head & Neck Surgery, Shanghai Jiaotong University Affiliated First People's Hospital, Shanghai. FAU - Chen, Tingting AU - Chen T AD - Lishui Central Hospital, Lishui, Zhejiang Province, People's Republic of China. FAU - Dong, Pin AU - Dong P AD - Department of Otolaryngology-Head & Neck Surgery, Shanghai Jiaotong University Affiliated First People's Hospital, Shanghai. LA - eng PT - Journal Article DEP - 20160726 PL - New Zealand TA - Onco Targets Ther JT - OncoTargets and therapy JID - 101514322 PMC - PMC4968859 OTO - NOTNLM OT - correlation analysis OT - laryngeal squamous cell carcinoma OT - non-coding RNA EDAT- 2016/08/25 06:00 MHDA- 2016/08/25 06:01 PMCR- 2016/07/26 CRDT- 2016/08/25 06:00 PHST- 2016/08/25 06:00 [entrez] PHST- 2016/08/25 06:00 [pubmed] PHST- 2016/08/25 06:01 [medline] PHST- 2016/07/26 00:00 [pmc-release] AID - ott-9-4629 [pii] AID - 10.2147/OTT.S96053 [doi] PST - epublish SO - Onco Targets Ther. 2016 Jul 26;9:4629-37. doi: 10.2147/OTT.S96053. eCollection 2016.