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  • Title: FOXN3 Expression Regulated by miR-299-5p Inhibiting the Proliferation, Migration and Invasion of Oral Squamous Cell Carcinoma Cells.
    Author: Maimaitiming K, Yilihamu A, Keyimu K, Keranmu R, Li J, Xu H, Wufuer D.
    Journal: Protein Pept Lett; 2022; 29(9):788-795. PubMed ID: 35975858.
    Abstract:
    BACKGROUND: Oral squamous cell carcinoma (OSCC) is one of the commonest malignancies of the oral cavity. FOXN3 is a tumor suppressor that represses the progression of many tumors. Nonetheless, its role in OSCC has not been elucidated. This work is performed to probe the role and dysregulation mechanism of FOXN3 in OSCC. METHODS: FOXN3 mRNA and miR-299-5p expressions were quantified by quantitative real-time polymerase chain reaction (qRT-PCR); 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) assay was employed to detect OSCC cell growth; Transwell experiment was conducted to detect cell migration and invasion; dual-luciferase reporter experiment and bioinformatics were adopted to analyze the relationship between miR-299-5p and FOXN3; Western blot was implemented to detect FOXN3 protein expression. RESULTS: FOXN3 expression was remarkably down-modulated, and miR-299-5p expression was markedly up-modulated in OSCC tissues and cell lines compared with paracancerous tissues and normal oral epithelial cell line. FOXN3 overexpression impeded OSCC cell growth, migration and invasion. FOXN3 was proven to be a downstream target of miR-299-5p, and miR-299-5p mimics enhanced OSCC cell growth, migration and invasion. Moreover, FOXN3 overexpression partially reversed the promoting effects of miR-299-5p mimics on OSCC cell growth, migration and invasion. CONCLUSION: FOXN3 expression is remarkably down-modulated in OSCC tissues and cell lines, and miR-299-5p targets FOXN3 to facilitate OSCC cell growth, migration and invasion. These results imply that miR-299-5p/FOXN3 axis may be a potential target for OSCC treatment.
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