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Inflammatory Micro-environment Contributes to Stemness Properties and Metastatic Potential of HCC via the NF-κB/miR-497/SALL4 Axis
Molecular Therapy - Oncolytics ( IF 5.7 ) Pub Date : 2019-09-10 , DOI: 10.1016/j.omto.2019.08.009
Bixing Zhao , Yingchao Wang , Xionghong Tan , Kun Ke , Xiaoyuan Zheng , Fei Wang , Shubing Lan , Naishun Liao , Zhixiong Cai , Yingjun Shi , Youshi Zheng , Yongping Lai , Lili Wang , Qin Li , Jingfeng Liu , Aimin Huang , Xiaolong Liu

Increasing evidence has demonstrated the essential role of inflammatory micro-environment in tumorigenesis and tumor progression. Some cancer cells in tumor maintain typical stemness properties and, with the capacity of self-renewal, are thought to be crucial for the initiation and maintenance of tumors as well as their metastasis. Although both inflammatory micro-environment and stemness properties played crucial roles in tumor initiation and development, currently it is still unclear whether and how the inflammatory micro-environment promotes cancer stemness properties. Here, we show the first evidence that the inflammatory micro-environment promotes the stemness properties and metastatic potential of hepatocellular carcinoma (HCC) via the NF-κB/miR-497/SALL4 axis. We discover that miR-497 directly targets SALL4, negatively regulates its expression, and further inhibits the self-renewal and metastasis of HCC; more importantly, inflammatory factor TNF-α inhibits the expression of miR-497 via NF-kB-mediated negative transcriptional regulation and simultaneously upregulates the expression of SALL4 and promotes the self-renewal and metastasis phenotypes of HCC cells. Moreover, lower expression of miR-497 is significantly associated with poor prognosis in HCC patients. Taken together, our findings not only revealed a novel signaling pathway (NF-κB/miR-497/SALL4 axis) to connect inflammation with stemness properties, and clarified the molecular mechanisms underlying the inflammation-mediated self-renewal and metastasis phenotypes, but also provided novel molecular targets for developing new anticancer strategies.



中文翻译:

炎性微环境通过NF-κB/ miR-497 / SALL4轴促进肝癌的气孔特性和转移潜能

越来越多的证据表明炎症微环境在肿瘤发生和肿瘤进展中的重要作用。肿瘤中的某些癌细胞保持典型的干性,并且具有自我更新的能力,被认为对于肿瘤的发生,维持及其转移至关重要。尽管炎性微环境和干性都在肿瘤的发生和发展中起着至关重要的作用,但是目前仍不清楚炎性微环境是否以及如何促进癌症的干性。在这里,我们显示出第一个证据,即炎症微环境通过NF-κB/ miR-497 / SALL4轴促进了肝细胞癌(HCC)的干性和转移潜能。我们发现miR-497直接针对SALL4,负调节其表达,并进一步抑制肝癌的自我更新和转移。更重要的是,炎症因子TNF-α通过NF-kB介导的负转录调节抑制miR-497的表达,同时上调SALL4的表达并促进HCC细胞的自我更新和转移表型。而且,miR-497的较低表达与HCC患者预后差有关。综上所述,我们的发现不仅揭示了一种新的信号传导途径(NF-κB/ miR-497 / SALL4轴),将炎症与干性联系起来,并阐明了炎症介导的自我更新和转移表型的分子机制,而且为开发新的抗癌策略提供了新的分子靶标。进一步抑制肝癌的自我更新和转移;更重要的是,炎症因子TNF-α通过NF-kB介导的负转录调节抑制miR-497的表达,同时上调SALL4的表达并促进HCC细胞的自我更新和转移表型。而且,miR-497的较低表达与HCC患者预后差有关。综上所述,我们的发现不仅揭示了一种新的信号传导途径(NF-κB/ miR-497 / SALL4轴),将炎症与干性联系起来,并阐明了炎症介导的自我更新和转移表型的分子机制,而且为开发新的抗癌策略提供了新的分子靶标。进一步抑制肝癌的自我更新和转移;更重要的是,炎症因子TNF-α通过NF-kB介导的负转录调节抑制miR-497的表达,同时上调SALL4的表达并促进HCC细胞的自我更新和转移表型。而且,miR-497的较低表达与HCC患者预后差有关。综上所述,我们的发现不仅揭示了一种新的信号传导途径(NF-κB/ miR-497 / SALL4轴),将炎症与干性联系起来,并阐明了炎症介导的自我更新和转移表型的分子机制,而且为开发新的抗癌策略提供了新的分子靶标。炎症因子TNF-α通过NF-kB介导的负转录调节抑制miR-497的表达,同时上调SALL4的表达并促进HCC细胞的自我更新和转移表型。而且,miR-497的较低表达与HCC患者预后差有关。综上所述,我们的发现不仅揭示了一种新的信号传导途径(NF-κB/ miR-497 / SALL4轴),将炎症与干性联系起来,并阐明了炎症介导的自我更新和转移表型的分子机制,而且为开发新的抗癌策略提供了新的分子靶标。炎症因子TNF-α通过NF-kB介导的负转录调节抑制miR-497的表达,同时上调SALL4的表达并促进HCC细胞的自我更新和转移表型。而且,miR-497的较低表达与HCC患者预后差有关。综上所述,我们的发现不仅揭示了一种新的信号传导途径(NF-κB/ miR-497 / SALL4轴),将炎症与干性联系起来,并阐明了炎症介导的自我更新和转移表型的分子机制,而且为开发新的抗癌策略提供了新的分子靶标。

更新日期:2019-09-10
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