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BACKGROUND This study was done to verify whether propofol could inhibit esophageal squamous cell carcinoma (ESCC) cell line EC9706 cell migration and invasion by targeting SOX4. MATERIAL AND METHODS Different concentrations of propofol were co-incubated with EC9706 cells. The pcDNA-SOX4 or SOX4 siRNA plasmid was transfected into cells before the treatment with propofol 5 µg/L. The migratory and invasion ability of EC9706 cells were tested by wound-healing assay and Transwell chambers. Western blotting was used to investigate the expressions of MMP-2, MMP-9, TIMP-1, TIMP-2, and SOX4. Gelatin zymography was employed to detect the activity of MMP2 and MMP-9. RESULTS Compared with the control, the migration and invasion activity of EC9706 cells were decreased after incubation with different concentrations of propofol (P&lt;0.01). The expression of MMP-2, MMP-9, and SOX4 was decreased and that of TIMP-1 was increased in the propofol-treated EC9706 cells (P&lt;0.01). Down-regulation of SOX4 by SOX4-siRNA had the same effect as propofol on EC9706 cells, including suppressing cell migration and invasion, inhibiting the expression and activity of MMP-2/9, and increasing the expression TIMP-1. Over-expression of SOX4 could partly abrogated propofol-mediated inhibition of EC9706 cell migration and invasion. CONCLUSIONS Propofol inhibits EC9706 cell migration and invasion by down-regulation of SOX4.

Propofol Suppresses Esophageal Squamous Cell Carcinoma Cell Migration and Invasion by Down-Regulation of Sex-Determining Region Y-box 4 (SOX4)