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Aryl hydrocarbon receptor mediates Jak2/STAT3 signaling for non-small cell lung cancer stem cell maintenance.
Experimental Cell Research ( IF 3.7 ) Pub Date : 2020-09-14 , DOI: 10.1016/j.yexcr.2020.112288
Jie Xiong 1 , Xinxin Zhang 2 , Yong Zhang 2 , Bin Wu 2 , Liang Fang 3 , Ning Wang 3 , Hongyu Yi 4 , Ning Chang 2 , Lihua Chen 3 , Jian Zhang 2
Affiliation  

Cancer stem cells (CSCs) play an important role in shaping the invasive cancer phenotype by contributing to tumor initiation, metastasis, relapse, and therapeutic resistance in non-small cell lung cancer (NSCLC). The Aryl hydrocarbon receptor (AhR), a ligand activated transcription factor, which is well known for mediating the toxicity and tumorigenesis of a variety of environmental pollutants, has been extensively recognized as an important mediator in NSCLC development. Here, evidence showed that AhR was overexpressed in NSCLC tissues, and a high AhR protein level was associated with an aggressive tumor phenotype. Knockdown of AhR suppressed cell proliferation, invasion and migration, as well as CSC-like properties, while upregulation and activation of AhR enhanced CSC-like properties and increased stem cell-associated gene expression in NSCLC cells. Elevated and activated AhR leads to phosphorylation of janus kinase 2 (Jak2), as well as its downstream effector, activator of transcription 3 (STAT3), while inhibition of Jak2/STAT3 signaling by pharmacologic approach attenuates the effects of AhR-mediated NSCLC cell stemness, suggesting a role for the Jak2/STAT3 pathway in AhR-regulated NSCLC stemness. In summary, our study uncovers a transcriptional-independent mechanism of AhR through which AhR mediates NSCLC stemness via Jak2/STAT3 signaling pathway, indicating a promising target for the treatment of NSCLC.



中文翻译:

芳基烃受体介导 Jak2/STAT3 信号传导以维持非小细胞肺癌干细胞。

癌症干细胞 (CSC) 通过促进非小细胞肺癌 (NSCLC) 的肿瘤发生、转移、复发和治疗抵抗,在塑造侵袭性癌症表型方面发挥重要作用。芳基烃受体 (AhR) 是一种配体激活的转录因子,以介导多种环境污染物的毒性和肿瘤发生而闻名,已被广泛认为是 NSCLC 发展的重要介质。在这里,有证据表明 AhR 在 NSCLC 组织中过度表达,并且高 AhR 蛋白水平与侵袭性肿瘤表型相关。击倒 AhR 抑制细胞增殖、侵袭和迁移,以及 CSC 样特性,而AhR的上调和激活增强了CSC样特性并增加了NSCLC细胞中干细胞相关基因的表达。升高和激活的 AhR 导致 janus 激酶 2 (Jak2) 及其下游效应子、转录激活子 3 (STAT3) 的磷酸化,而通过药理学方法抑制 Jak2/STAT3 信号会减弱 AhR 介导的 NSCLC 细胞干细胞的作用,表明 Jak2/STAT3 通路在 AhR 调节的 NSCLC 干性中的作用。总之,我们的研究揭示了 AhR 的转录独立机制,通过该机制,AhR 通过 Jak2/STAT3 信号通路介导 NSCLC 干性,表明了治疗 NSCLC 的有希望的靶点。转录激活因子 3 (STAT3),而通过药理学方法抑制 Jak2/STAT3 信号会减弱 AhR 介导的 NSCLC 细胞干性的作用,表明 Jak2/STAT3 通路在 AhR 调节的 NSCLC 干性中的作用。总之,我们的研究揭示了 AhR 的转录独立机制,通过该机制,AhR 通过 Jak2/STAT3 信号通路介导 NSCLC 干性,表明了治疗 NSCLC 的有希望的靶点。转录激活因子 3 (STAT3),而通过药理学方法抑制 Jak2/STAT3 信号会减弱 AhR 介导的 NSCLC 细胞干性的作用,表明 Jak2/STAT3 通路在 AhR 调节的 NSCLC 干性中的作用。总之,我们的研究揭示了 AhR 的转录独立机制,通过该机制,AhR 通过 Jak2/STAT3 信号通路介导 NSCLC 干性,表明了治疗 NSCLC 的有希望的靶点。

更新日期:2020-09-15
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