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Effects of LncRNA KCNQ1OT1 on proliferation and migration of ovarian cancer cells by Wnt/β-catenin.

OBJECTIVE
To explore the role of long noncoding ribonucleic acid (lncRNA) KCNQ1OT1 in the proliferation, apoptosis, and migration of ovarian cancer cells via Wnt/β-catenin.


MATERIALS AND METHODS
Ovarian cancer A2780 cells were divided into three groups, namely control group, KCNQ1OT1 overexpression group, and KCNQ1OT1 knockdown group. Next, the effect of KCNQ1OT1 on the proliferation of ovarian cancer A2780 cells was detected by cell counting kit-8 (CCK-8) assay. Wound healing assay and transwell assay were carried out to determine the influence of KCNQ1OT1 on the migration ability of ovarian cancer A2780 cells. The role of KCNQ1OT1 in the cell cycle of ovarian cancer A2780 cells was detected via flow cytometry. The impact of KCNQ1OT1 on the expression level of β-catenin protein in ovarian cancer A2780 cells was determined through Western blotting and fluorescence immunoassay.


RESULTS
The proliferation rate of cells was overtly decreased in KCNQ1OT1 knockdown group but significantly increased in KCNQ1OT1 overexpression group. The results of both wound healing and transwell assays showed that the migration ability of cells was reduced in KCNQ1OT1 knockdown group but raised in KCNQ1OT1 overexpression group. According to flow cytometry, the cell cycle was clearly arrested in the G0/G1 phase in KCNQ1OT1 knockdown group. The results of Western blotting and fluorescence immunoassay revealed that compared with that in control group, the expression level of β-catenin protein evidently declined in KCNQ1OT1 knockdown group, but it was notably elevated in KCNQ1OT1 overexpression group.


CONCLUSIONS
Increased lncRNA KCNQ1OT1 in ovarian cancer cells promotes the expression of β-catenin, thereby facilitating the proliferation and migration of ovarian cancer cells.