OBJECTIVE: To investigate the effect of sex determining region Y-box 9 (SOX9) on epithelial mesenchymal transition (EMT) and cloning of oral squamous cell carcinoma (OSCC). METHODS: siRNA control, SOX9 siRNA were transfected into BcaCD885 cells in OSCC. Simultaneously, cells that did not undergo transfection were used as the control. Quantitative real time polymerase chain reaction (qRT-PCR) and Western blot were used to select SOX9 siRNA1 with enhanced interference effect. A cell cloning assay was used to determine the cell's clone formation ability. E-cadherin and Vimentin expressions were detected by immunofluorescence. The expressions of E-cadherin, matrix metalloprotease 2 (MMP-2), Vimentin and matrix metalloprotease 9 (MMP-9) were detected by Western blot. Cell invasion and migration were detected in the Transwell compartment. RESULTS: The levels of SOX9 mRNA and protein in SOX9 siRNA cells were significantly lower than those of the control (P<0.05). An increase in the number of SOX9 siRNA1 cell clonesled to the considerable decrease of the number of cell invasion and migration. In addition, levels of MMP-2 and MMP-9 proteins in cells decreased significantly compared with the control (P<0.05). The level of Vimentin expression in SOX9 siRNA1 cells decreased, and expression level of E-cadherin was elevated. Cell EMT was inhibited compared with the control, and the difference was statistically significant (P<0.05). CONCLUSIONS: Down-regulation of SOX9 inhibited EMT, clonogenic formation, cell invasion and OSCC migration.
OBJECTIVE: To investigate the effect of sex determining region Y-box 9 (SOX9) on epithelial mesenchymal transition (EMT) and cloning of oral squamous cell carcinoma (OSCC). METHODS: siRNA control, SOX9 siRNA were transfected into BcaCD885 cells in OSCC. Simultaneously, cells that did not undergo transfection were used as the control. Quantitative real time polymerase chain reaction (qRT-PCR) and Western blot were used to select SOX9 siRNA1 with enhanced interference effect. A cell cloning assay was used to determine the cell's clone formation ability. E-cadherin and Vimentin expressions were detected by immunofluorescence. The expressions of E-cadherin, matrix metalloprotease 2 (MMP-2), Vimentin and matrix metalloprotease 9 (MMP-9) were detected by Western blot. Cell invasion and migration were detected in the Transwell compartment. RESULTS: The levels of SOX9 mRNA and protein in SOX9 siRNA cells were significantly lower than those of the control (P<0.05). An increase in the number of SOX9 siRNA1 cell clonesled to the considerable decrease of the number of cell invasion and migration. In addition, levels of MMP-2 and MMP-9 proteins in cells decreased significantly compared with the control (P<0.05). The level of Vimentin expression in SOX9 siRNA1 cells decreased, and expression level of E-cadherin was elevated. Cell EMT was inhibited compared with the control, and the difference was statistically significant (P<0.05). CONCLUSIONS: Down-regulation of SOX9 inhibited EMT, clonogenic formation, cell invasion and OSCC migration.
Entities:
Keywords:
cell clones; epithelial mesenchymal transition; oral squamous cell carcinoma; sex determining region Y-box 9
Authors: Mitsuteru Natsuizaka; Kelly A Whelan; Shingo Kagawa; Koji Tanaka; Veronique Giroux; Prasanna M Chandramouleeswaran; Apple Long; Varun Sahu; Douglas S Darling; Jianwen Que; Yizeng Yang; Jonathan P Katz; E Paul Wileyto; Devraj Basu; Yoshiaki Kita; Shoji Natsugoe; Seiji Naganuma; Andres J Klein-Szanto; J Alan Diehl; Adam J Bass; Kwok-Kin Wong; Anil K Rustgi; Hiroshi Nakagawa Journal: Nat Commun Date: 2017-11-24 Impact factor: 14.919