miR-1269 promotes metastasis and forms a positive feedback loop with TGF-β.

miR-1269 promotes metastasis and forms a positive feedback loop with TGF-β.
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DOI:
10.1038/ncomms7879
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发表时间:
2015-04-15
影响因子:
16.6
通讯作者:
Shen X
Shen X
中科院分区:
综合性期刊1区
文献类型:
--
作者:
Bu P;Wang L;Chen KY;Rakhilin N;Sun J;Closa A;Tung KL;King S;Kristine Varanko A;Xu Y;Huan Chen J;Zessin AS;Shealy J;Cummings B;Hsu D;Lipkin SM;Moreno V;Gümüş ZH;Shen X

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随着患者的生存率从早期癌症急剧下降到晚期和转移性癌症,促进复发和转移的microRNA可以作为预后和预测标志物以及化学预防的治疗靶点。在这里,我们发现miR-1269 a促进结直肠癌(CRC)转移,并与TGF-β信号传导形成正反馈环。miR-1269 a在晚期CRC中上调,对100例II期CRC患者的长期监测显示,手术切除的原发性肿瘤中的miR-1269 a表达与CRC复发和转移的风险密切相关。与临床观察结果一致,miR-1269 a显著增加CRC细胞在体内侵袭和转移的能力。TGF-β通过Sox 4激活miR-1269,而miR-1269 a通过靶向Smad 7和HOXD 10增强TGF-β信号传导,从而形成正反馈环。我们的研究结果表明,miR-1269 a是一个潜在的标志物,为CRC患者提供辅助化疗决策的信息,也是一个潜在的治疗靶点,以阻止转移。
As patient survival drops precipitously from early-stage cancers to late-stage and metastatic cancers, microRNAs that promote relapse and metastasis can serve as prognostic and predictive markers as well as therapeutic targets for chemoprevention. Here we show that miR-1269a promotes colorectal cancer (CRC) metastasis and forms a positive feedback loop with TGF-β signaling. miR-1269a is upregulated in late-stage CRCs, and long-term monitoring of 100 stage II CRC patients revealed that miR-1269a expression in their surgically removed primary tumors is strongly associated with risk of CRC relapse and metastasis. Consistent with clinical observations, miR-1269a significantly increases the ability of CRC cells to invade and metastasize in vivo. TGF-β activates miR-1269 via Sox4, while miR-1269a enhances TGF-β signaling by targeting Smad7 and HOXD10, hence forming a positive feedback loop. Our findings suggest that miR-1269a is a potential marker to inform adjuvant chemotherapy decisions for CRC patients and a potential therapeutic target to deter metastasis.
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