Jagged1 expression regulated by Notch3 and Wnt/β-catenin signaling pathways in ovarian cancer.

ABSTRACT: Ovarian serous carcinoma is a highly aggressive neoplastic disease in women. Our previous studies have demonstrated Notch3 gene amplification and upregulation in many ovarian serous carcinomas and Notch pathway activity contributed to drug resistance. Among different Notch3 ligands, Jagged1 is most dominant in ovarian cancer, and Notch3 pathway activity correlated with Jagged1 expression level in ovarian carcinoma tissues. In this study, we found that Jagged1 expression depended on Notch3 pathway activation. Knockdown of either Notch3 or RBPjk, a Notch-interacting transcription factor critical in Notch signaling, suppressed Jagged1 expression in ovarian cancer cells. Moreover, Jagged1 expression was upregulated in human ovarian surface epithelial cells after ectopic expression of Notch3 in

SUBMITTER: Chen X 

PROVIDER: S-EPMC2953807 | biostudies-literature | 2010 Jul

REPOSITORIES: biostudies-literature