Abstract
Wnt/β-catenin pathway is associated with the progression of various cancers such as gastric cancer, colorectal cancer, and endometrial cancer. Using the Kaplan-Meier Plotter database, we found that WNT6 was associated with progression-free survival (PFS) outcomes. Immunohistochemical analysis of ovarian cancer samples and normal ovaries showed that the expression of WNT6 protein was significantly increased in ovarian cancer samples. Further, we explored the possible role of WNT6 in the occurrence and development of ovarian cancer. Our results showed that the mRNA and protein expression of WNT6 were significantly higher in CAOV3 and OVCAR3 cells compared with other ovarian cancer cell lines and normal ovarian cell line IOSE-80 as well. The transformation of CAOV3 and OVCAR3 cells with short interfering WNT6 (siWNT6) significantly inhibited their proliferation and lamellipodia formation, causing cell cycle arrest and promoting cell apoptosis. Western blot experiments confirmed that the down-regulation of WNT6 inhibited the expression of β-catenin and Notch1. These results suggest that WNT6 plays an important role in the occurrence and development of ovarian cancer.
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