MYEOV functions as an amplified competing endogenous RNA in promoting metastasis by activating TGF-β pathway in NSCLC.

MYEOV functions as an amplified competing endogenous RNA in promoting metastasis by activating TGF-β pathway in NSCLC.
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DOI:
10.1038/s41388-018-0484-9
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发表时间:
2019-03
期刊:
影响因子:
8
通讯作者:
Guan H
Guan H
中科院分区:
医学1区
文献类型:
--
作者:
Fang L;Wu S;Zhu X;Cai J;Wu J;He Z;Liu L;Zeng M;Song E;Li J;Li M;Guan H

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非小细胞肺癌(NSCLC)仍然是世界范围内的主要死亡原因。由于转移性疾病是NSCLC临床结局差的主要原因,因此了解NSCLC细胞播散的过程及其潜在的分子机制非常重要。在这项研究中,我们发现了一种新的竞争性内源性RNA(ceRNA),即MYEOV转录本,并发现它在NSCLC中上调,并与疾病的预后不良相关。我们进一步发现MYEOV ceRNA在非小细胞肺癌细胞的侵袭和转移中发挥着关键作用。有趣的是,MYEOV ceRNA不依赖于其蛋白质编码能力而发挥其促转移功能,但以miR-30 c-2- 3 p结合依赖性方式发挥其促转移功能。进一步的实验表明,MYEOV ceRNA隔离了miR-30 c-2- 3 p与其靶TGFBR 2和USP 15 mRNA的结合,这反过来导致了TGF-β信号传导的组成性激活和NSCLC中的肿瘤进展。通过确定TGF-β信号传导的新的调节模式层,我们的研究结果扩展了目前对介导NSCLC进展的分子机制的理解,并突出了MYEOV转录物作为治疗靶点的潜在作用。
Non-small cell lung cancer (NSCLC) remains a major cause of death worldwide. As metastatic disease is primarily responsible for the poor clinical outcome of NSCLC, it is important to understand the process, and its underlying molecular mechanism as well, via which NSCLC cells disseminate. In this study, we identified a new competing endogenous RNA (ceRNA), namely, the MYEOV transcript, and found that it is upregulated in NSCLC and associated with a poor prognosis of the disease. We further uncovered that the MYEOV ceRNA plays a critical role in the invasion and metastasis of NSCLC cells. Intriguingly, the MYEOV ceRNA exerted its pro-metastatic function independent of its protein-coding capacity, but in a miR-30c-2-3p binding-dependent manner. Further experiments demonstrated that the MYEOV ceRNA sequestered miR-30c-2-3p from binding its targets TGFBR2 and USP15 mRNAs, which in turn leading to constitutive activation of TGF-β signaling and tumor progression in NSCLC. By identifying a new layer of regulatory modality for TGF-β signaling, our findings extend the current understanding on the molecular mechanism mediating NSCLC progression and highlight a potential role of MYEOV transcript to serve as the therapeutic target.
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