Abstract
SUMOylation and deSUMOylation are dynamic mechanisms regulating a spectrum of protein activities. The SUMO proteases (SENP) remove SUMO conjugate from proteins, and their expression is deregulated in cancers. SENP2 has been reported to play a critical role in the control of hepatocellular carcinoma (HCC) cell growth by modulating the stability of β-catenin. However, the underlying mechanism remains largely unknown. Here, we show that the WW domain-containing oxidoreductase (WWOX), a novel inhibitor of the Wnt/β-catenin pathway, is required for stabilization of β-catenin regulated by SENP2 in HCC cells. The transcriptional level of WWOX is tightly regulated by SENP2. Moreover, knockdown of WWOX by siRNA attuned SENP2-induced β-catenin degradation and decreased SENP2-mediated HCC cell proliferation arrest. Taken together, our data suggested that WWOX is a key downstream modulator of the SENP2 tumor suppressor function in HCC cell.
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Jiang, QF., Tian, YW., Shen, Q. et al. SENP2 regulated the stability of β-catenin through WWOX in hepatocellular carcinoma cell. Tumor Biol. 35, 9677–9682 (2014). https://doi.org/10.1007/s13277-014-2239-8
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DOI: https://doi.org/10.1007/s13277-014-2239-8