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  • Title: Loss of Wwox drives metastasis in triple-negative breast cancer by JAK2/STAT3 axis.
    Author: Chang R, Song L, Xu Y, Wu Y, Dai C, Wang X, Sun X, Hou Y, Li W, Zhan X, Zhan L.
    Journal: Nat Commun; 2018 Aug 28; 9(1):3486. PubMed ID: 30154439.
    Abstract:
    Loss of WW domain-containing oxidoreductase (Wwox) expression has been observed in breast cancer (BC). However, its regulatory effects are largely unknown, especially in triple-negative breast cancer (TNBC). Herein, gene expression profiling revealed that JAK/STAT3 pathway was one of the most differentially modulated pathways in basal-like BC cells. The lower expression of Wwox was significantly correlated with high activation of STAT3 in basal-like cells and TNBC tissues. Overexpression of Wwox markedly inhibited proliferation and metastasis of BC cells by suppressing STAT3 activation, which is to interact with JAK2 to inhibit JAK2 and STAT3 phosphorylation. Furthermore, Wwox limited STAT3 binding to the interleukin-6 promoter, repressing expression of the IL-6 cytokine. Altogether, our data established that Wwox suppresses BC cell metastasis and proliferation by JAK2/STAT3 pathway. Targeting of Wwox with STAT3 could offer a promising therapeutic strategy for TNBC.
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