Laryngeal cancer (LCa) is a prevalent malignant head and neck cancer with relatively unclear pathogenesis. A prior study has suggested that miR-183 differentially expressed in laryngeal-related malignancies, but its accurate role has not been fully ascertained in LCa. miR-183 expression in LCa tissues and cells was detected assisted by TCGA/GEO databases or qRT-PCR assay, relatively. Target genes of miR-183 were predicted accessing to TargetScan website. Luciferase activity analysis was conducted to determine the relationship between miR-183 and its possible target. CCK-8, colony formation and transwell invasion and migration experiments were implemented to measure LCa cell viability, invasion and migration. Western blot assay was utilized to evaluate cell adhesion and EMT-related proteins expressions. The expression of miR-183 was expressed in LCa tissue samples and cells at higher levels than normal controls. Upregulation of miR-183 facilitated Hep-2 and TU212 cells viability, while miR-183 reduction inhibited the proliferative potential of Hep-2 and TU212 cells. TMSB4Y was determined as a possible target of miR-183, and its expression was decreased in LCa. LCa patients with low TMSB4Y expression had poorer outcomes relative to that with high TMSB4Y expression. TMSB4Y overturned the promoting impacts of miR-183 on the LCa cellular malignant behaviors, including cell proliferation, colonogenicity, invasion and migration. miR-183 overexpression inhibited cell adhesion through inhibiting TMSB4Y expression. Overall, all results elucidated that miR-183, as an oncogenic molecule in LCa, may be used to predict the prognosis of LCa patients by targeting TMSB4Y.
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