The tumor suppressor interferon regulatory factor 8 inhibits beta-catenin signaling in breast cancers, but is frequently silenced by promoter methylation
Publication in refereed journal

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其它資訊
摘要Interferon (IFN) regulatory factor 8 is encoded by a novel candidate tumor suppressor gene (IRF8), its promotor is frequently methylated in multiple cancers. However, the promoter methylation status, functions and underlying mechanisms of IRF8 in breast cancer remain unclear. We found that IRF8 was downregulated in breast cancer cell lines and primary tumors, compared with normal breast tissues, mainly because of aberrant promoter methylation. However, its expression was not associated with pathological characteristics. Restoration of IRF8 expression suppressed cell proliferation, colony formation, 5-ethynyl-2'-deoxyuridine incorporation, cell migration and invasion, and induced apoptosis and cell cycle arrest in vitro. IRF8 also inhibited xenograft growth in nude mice in vivo. Competition with IRF8 function by IRF8 mutant (K79E) enhanced cell migration and invasion in 4T1 murine cells in vitro. Importantly, IRF8, as both downstream target gene and regulator of IFN-(Upsilon)/STAT1 signaling, inhibited canonical beta-catenin signaling. These findings identify IRF8 as a novel tumor suppressor regulating IFN-(Upsilon)/STAT1 signaling and beta-catenin signaling in breast cancer.
著者Luo XR, Xiong X, Shao Q, Xiang TX, Li LL, Yin XD, Li X, Tao Q, Ren GS
期刊名稱Oncotarget
出版年份2017
月份7
日期25
卷號8
期次30
出版社IMPACT JOURNALS LLC
頁次48875 - 48888
國際標準期刊號1949-2553
語言英式英語
關鍵詞interferon regulatory factor 8,methylation,tumor suppressor,breast cancer,beta-catenin
Web of Science 學科類別Oncology;Cell Biology;Oncology;Cell Biology

上次更新時間 2020-21-11 於 02:31