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  • Title: The E3 ubiquitin ligase RNF146 promotes colorectal cancer by activating the Wnt/β-catenin pathway via ubiquitination of Axin1.
    Author: Shen J, Yu Z, Li N.
    Journal: Biochem Biophys Res Commun; 2018 Sep 05; 503(2):991-997. PubMed ID: 29932918.
    Abstract:
    The E3 ubiquitin ligase ring finger protein 146 (RNF146) has been implicated in tumor development. However, the role and clinical significance of RNF146 in colorectal cancer (CRC) remain unknown. In this study, we reported for the first time that RNF146 was upregulated in CRC tissues as well as in cell lines. Further, RNF146 expression was independent prognostic factor for poor outcome of CRC patients. RNF146 knockdown in cell lines inhibited cell growth, promoted cell apoptosis in vitro and suppressed colorectal tumor growth in vivo. Mechanistic investigations revealed that RNF146 exerted oncogenic role through ubiquitination of Axin1 to activate β-catenin signaling. In addition, RNF146 expression was positively correlated with β-catenin expression in CRC tissues. Collectively, our data suggest that RNF146 might function as a oncogene in human CRC, and represent a promising prognostic factor and a valuable therapeutic target for CRC.
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