Evidence has indicated the important roles of long non-coding RNAs (lncRNAs) in the human cancer biology, providing potential targets for cancer intervention. However, the expression profile and function of lncRNA TP73-AS1 in human epithelial ovarian cancer (EOC) remain to be investigated. In the EOC specimens and cell lines, TP73-AS1 was identified to be significantly up-regulated. EOC patients with high TP73-AS1 expression had poor survival rate. The gain and loss of functional assay uncovered that TP73-AS1 promoted the proliferation, invasion and reduced the apoptosis of EOC cells in vitro. And, the knockdown of TP73-AS1 inhibited the tumor growth in vivo. By using chromatin immunoprecipitation and luciferase reporter assay, we identified TP73-AS1 epigenetically repressed p21 via recruiting EZH2. In conclusion, this finding supports that TP73-AS1 promotes the EOC progression via epigenetically repressing p21, serving as a prognosis predictor for EOC patients.
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