ADAR2/miR-589-3p axis controls glioblastoma cell migration/invasion.

ADAR2/miR-589-3p axis controls glioblastoma cell migration/invasion.
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DOI:
10.1093/nar/gkx1257
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发表时间:
2018-02-28
影响因子:
14.9
通讯作者:
Gallo A
Gallo A
中科院分区:
生物学2区
文献类型:
--
作者:
Cesarini V;Silvestris DA;Tassinari V;Tomaselli S;Alon S;Eisenberg E;Locatelli F;Gallo A

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最近的研究报道了microRNAs(MiRNAs)在人类癌症中的作用。我们系统地研究了miRNA在人脑中的表达和编辑,在人类组织中显示了最多的A-to-I RNA编辑位点,以及在新生胶质母细胞瘤脑癌中。我们鉴定出299个miRNAs的表达发生了变化,24个miRNAs在人脑中的编辑与胶质母细胞瘤组织相比有所不同。我们重点关注了miR-589-3P种子中的编辑站点。MIR-589-3P是一种在正常脑中几乎完全编辑(∼100%)的唯一miRNA,在胶质母细胞瘤中具有持续的编辑减少。编辑后的miR-589-3p抑制胶质母细胞瘤细胞的增殖、迁移和侵袭,而未编辑的miR-589-3p促进细胞的增殖和运动/侵袭,是一种潜在的促癌因子。我们证明了这个miRNA的编辑是由ADAR2介导的,并将miR-589-3p从抑癌基因PCDH9重定为ADAM12,后者编码促进胶质母细胞瘤侵袭的金属蛋白酶12。总体而言,我们的研究剖析了miR-589-3P中具有重要抗癌功能的独特大脑特异编辑位点的作用,并强调了RNA编辑作为关键参与者的重要性,不仅对于多样化基因组信息,而且对于纠正不可耐受/关键的基因组编码位点。
Recent studies have reported the emerging role of microRNAs (miRNAs) in human cancers. We systematically characterized miRNA expression and editing in the human brain, which displays the highest number of A-to-I RNA editing sites among human tissues, and in de novo glioblastoma brain cancer. We identified 299 miRNAs altered in their expression and 24 miRNAs differently edited in human brain compared to glioblastoma tissues. We focused on the editing site within the miR-589–3p seed. MiR-589–3p is a unique miRNA almost fully edited (∼100%) in normal brain and with a consistent editing decrease in glioblastoma. The edited version of miR-589–3p inhibits glioblastoma cell proliferation, migration and invasion, while the unedited version boosts cell proliferation and motility/invasion, thus being a potential cancer-promoting factor. We demonstrated that the editing of this miRNA is mediated by ADAR2, and retargets miR-589–3p from the tumor-suppressor PCDH9 to ADAM12, which codes for the metalloproteinase 12 promoting glioblastoma invasion. Overall, our study dissects the role of a unique brain-specific editing site within miR-589–3p, with important anticancer features, and highlights the importance of RNA editing as an essential player not only for diversifying the genomic message but also for correcting not-tolerable/critical genomic coding sites.
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