The miR-17-92 microRNA cluster regulates multiple components of the TGF-β pathway in neuroblastoma.

The miR-17-92 microRNA cluster regulates multiple components of the TGF-β pathway in neuroblastoma.
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DOI:
10.1016/j.molcel.2010.11.038
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发表时间:
2010-12-10
期刊:
影响因子:
16
通讯作者:
Vandesompele J
Vandesompele J
中科院分区:
生物学1区
文献类型:
--
作者:
Mestdagh P;Boström AK;Impens F;Fredlund E;Van Peer G;De Antonellis P;von Stedingk K;Ghesquière B;Schulte S;Dews M;Thomas-Tikhonenko A;Schulte JH;Zollo M;Schramm A;Gevaert K;Axelson H;Speleman F;Vandesompele J

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miR-17 - 92 microRNA簇通常在癌细胞中被激活,但其靶标的身份仍然难以捉摸。使用SILAC和定量质谱,我们研究了miR-17 - 92簇的激活对神经母细胞瘤细胞中整体蛋白表达的影响。我们的研究结果揭示了单个miR-17 - 92 miRNA之间的合作,并暗示miR-17 - 92在癌症的多个标志中,包括增殖和细胞粘附。最重要的是,我们发现miR-17 - 92是TGF β信号传导的有效抑制剂。通过在pSMAD 2的上游和下游发挥作用,miR-17 - 92激活触发了沿着TGF β信号级联的多个关键效应物的下调,以及通过直接抑制TGF β应答基因。
The miR-17-92 microRNA cluster is often activated in cancer cells, but the identity of its targets remains elusive. Using SILAC and quantitative mass spectrometry, we examined the effects of activation of the miR-17-92 cluster on global protein expression in neuroblastoma cells. Our results reveal cooperation between individual miR-17-92 miRNAs and implicate miR-17-92 in multiple hallmarks of cancer, including proliferation and cell adhesion. Most importantly, we show that miR-17-92 is a potent inhibitor of TGFβ-signaling. By functioning both upstream and downstream of pSMAD2, miR-17-92 activation triggers downregulation of multiple key effectors along the TGFβ-signaling cascade as well as through direct inhibition of TGFβ-responsive genes.
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