RESUMEN
@# Objective：To investigate the effect of long-chain non-coding RNATTTY10 (lncRNATTTY10) on the migration and invasion of cervical cancer cells, and to explore its regulatory effect on miR-490-3p and HMGB1 (high mobility group box 1) signaling pathways. Methods: Fourteen paris of cervical cancer tissues and corresponding paracancerous tissues resected at the Department of Obstetrics and Gynecology,Affiliated Wuhan Central Hospital of Tongji Medical College fromAugust 2013 to December 2014 were collected for this study. The expression of TTTY10 in cervical cancer tissue and different cervical cancer cell lines were detected by qPCR. Plasmids encoding TTTY10-siRNA or empty plasmids were transfected into cervical cancer CasKicells, and the transfection efficiency was detected by qPCR. Transwell migration assay and Transwell invasion assay were used to detect the migration and invasion abilities of cervical cancer cells after TTTY10 silencing. qPCR was used to detect the expression of miR-490-3p and HMGB1 mRNA after TTTY10 silencing. Dual luciferase reporter assay validated the interaction between miR-490-3p and HMGB1. Western blotting was used to detect the expression of HMGB1 signaling pathway related proteins after TTTY10 silencing. Results: The expression of TTTY10 in cervical cancer tissues was significantly higher than that in paracancerous tissues (P<0.01), the expression of TTTY10 in cervical cancer cell lines was significantly higher than that in cervical epithelial cells (P<0.01). TTTY10-siRNAplasmids could efficiently transfectCasKicells to knockdown TTTY10 expression (P<0.01). Silencing of TTTY10 inhibited the migration and invasion of cervical cancer CasKi cells (P<0.05), promoted the expression of miR-490-3p (P<0.01) and inhibited the expression of HMGB1 mRNAin cervical cancer (P<0.05 or P<0.01). miR-490-3p could specifically bind to the 3'-UTR of HMGB1 mRNA(P<0.01). HMGB1 signaling pathway related proteins were down-regulated after TTTY10 silencing. Conclusion: TTTY10 can target regulate the expression of miR-490-3p and affect the migration and invasion ability of cervical cancer CasKi cells through the HMGB1 signaling pathway; TTTY10 can be used as a diagnostic marker and potential treatment target of cervical cancer.