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Suppression Of β-catenin Nuclear Translocation By CGP57380 Decelerates Poor Progression And Potentiates Radiation-Induced Apoptosis in Nasopharyngeal Carcinoma
Theranostics ( IF 12.4 ) Pub Date : 2017-05-30 , DOI: 10.7150/thno.17665
Weiyuan Wang , Qiuyuan Wen , Jiadi Luo , Shuzhou Chu , Lingjiao Chen , Lina Xu , Hongjing Zang , Mohannad Ma Alnemah , Jinghe Li , Jianhua Zhou , Songqing Fan

Nuclear localization of β-catenin is essential for the progression of various human cancers via transcriptional upregulation of downstream genes. The MAP kinase interacting serine/threonine kinase (MNK)-eukaryotic translation initiation factor 4E (eIF4E) axis has been reported to activate Wnt/β-catenin signaling, and CGP57380, an inhibitor of MNK kinases, inhibits the proliferation of multiple cancers. In this study, we showed that β-catenin signaling (including β-catenin, cyclin D1, c-Myc, and MMP-7) and p-eIF4E expression were elevated in nasopharyngeal carcinoma (NPC) compared with non-cancerous nasopharyngeal epithelial tissues, and was associated with clinical characteristics of NPC patients. Lymph node metastasis, gender, aberrant β-catenin expression, and elevated levels of MMP-7 and cyclin D1 were independent prognostic factors. Significantly, expression of p-eIF4E was positively correlated with β-catenin, and targeting the MNK-eIF4E axis with CGP57380 downregulated β-catenin in the nucleus, which in turn decreased proliferation, cell cycle progression, migration, invasion, and metastasis of NPC in vitro and in vivo. CGP57380 also potentiated radiation-induced apoptosis in NPC. Moreover, CGP57380 upregulated β-catenin in the cytoplasm thus blocking epithelial-mesenchymal transition (EMT), a key mechanism in cancer cell invasiveness and metastasis. Mechanistically, inhibition of β-catenin nuclear translocation by CGP57380 was dependent on AKT activation. Notably, identification of the MNK/eIF4E/β-catenin axis might provide a potential target for overcoming the poor prognosis mediated by β-catenin in NPC.

中文翻译:

CGP57380抑制β-catenin核转运可减慢鼻咽癌的进展,并增强放射诱导的细胞凋亡。

通过下游基因的转录上调,β-catenin的核定位对于各种人类癌症的进展至关重要。据报道,MAP激酶相互作用的丝氨酸/苏氨酸激酶(MNK)-真核翻译起始因子4E(eIF4E)轴可激活Wnt /β-catenin信号传导,而MGP激酶的抑制剂CGP57380可抑制多种癌症的增殖。在这项研究中,我们显示与非癌性鼻咽上皮组织相比,鼻咽癌(NPC)中的β-catenin信号传导(包括β-catenin,cyclin D1,c-Myc和MMP-7)和p-eIF4E表达升高,并与NPC患者的临床特征有关。淋巴结转移,性别,β-catenin异常表达以及MMP-7和cyclin D1水平升高是独立的预后因素。重要的是,p-eIF4E的表达与β-catenin正相关,并以CGP57380下调了细胞核中的β-catenin靶向MNK-eIF4E轴,从而降低了NPC的增殖,细胞周期进程,迁移,侵袭和转移体外和体内。CGP57380还增强了辐射诱导的NPC细胞凋亡。此外,CGP57380上调了细胞质中的β-catenin,从而阻断了上皮-间质转化(EMT),这是癌细胞侵袭和转移的关键机制。从机理上讲,CGP57380对β-catenin核转运的抑制作用取决于AKT激活。值得注意的是,MNK / eIF4E /β-catenin轴的鉴定可能为克服NPC中β-catenin介导的不良预后提供了潜在的靶点。并以CGP57380下调细胞核中的β-catenin靶向MNK-eIF4E轴,进而降低了NPC在体外和体内的增殖,细胞周期进程,迁移,侵袭和转移。CGP57380还增强了辐射诱导的NPC细胞凋亡。此外,CGP57380上调了细胞质中的β-catenin,从而阻断了上皮-间质转化(EMT),这是癌细胞侵袭和转移的关键机制。从机理上讲,CGP57380对β-catenin核转运的抑制作用取决于AKT激活。值得注意的是,MNK / eIF4E /β-catenin轴的鉴定可能为克服NPC中β-catenin介导的不良预后提供了潜在的靶点。并以CGP57380下调细胞核中的β-catenin靶向MNK-eIF4E轴,进而降低了NPC在体外和体内的增殖,细胞周期进程,迁移,侵袭和转移。CGP57380还增强了辐射诱导的NPC细胞凋亡。此外,CGP57380上调了细胞质中的β-catenin,从而阻断了上皮-间质转化(EMT),这是癌细胞侵袭和转移的关键机制。从机理上讲,CGP57380对β-catenin核转运的抑制作用取决于AKT激活。值得注意的是,MNK / eIF4E /β-catenin轴的鉴定可能为克服NPC中β-catenin介导的不良预后提供了潜在的靶点。NPC在体外和体内的迁移,侵袭和转移。CGP57380还增强了辐射诱导的NPC细胞凋亡。此外,CGP57380上调了细胞质中的β-catenin,从而阻断了上皮-间质转化(EMT),这是癌细胞侵袭和转移的关键机制。从机理上讲,CGP57380对β-catenin核转运的抑制作用取决于AKT激活。值得注意的是,MNK / eIF4E /β-catenin轴的鉴定可能为克服NPC中β-catenin介导的不良预后提供了潜在的靶点。NPC在体外和体内的迁移,侵袭和转移。CGP57380还增强了辐射诱导的NPC细胞凋亡。此外,CGP57380上调了细胞质中的β-catenin,从而阻断了上皮-间质转化(EMT),这是癌细胞侵袭和转移的关键机制。从机理上讲,CGP57380对β-catenin核转运的抑制作用取决于AKT激活。值得注意的是,MNK / eIF4E /β-catenin轴的鉴定可能为克服NPC中β-catenin介导的不良预后提供了潜在的靶点。从机理上讲,CGP57380对β-catenin核转运的抑制作用取决于AKT激活。值得注意的是,MNK / eIF4E /β-catenin轴的鉴定可能为克服NPC中β-catenin介导的不良预后提供了潜在的靶点。从机理上讲,CGP57380对β-catenin核转运的抑制作用取决于AKT激活。值得注意的是,MNK / eIF4E /β-catenin轴的鉴定可能为克服NPC中β-catenin介导的不良预后提供了潜在的靶点。
更新日期:2017-07-01
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