MicroRNA-130a associates with ribosomal protein L11 to suppress c-Myc expression in response to UV irradiation.

MicroRNA-130a associates with ribosomal protein L11 to suppress c-Myc expression in response to UV irradiation.
复制标题

DOI:
10.18632/oncotarget.2728
复制
发表时间:
2015-01-20
期刊:
影响因子:
--
通讯作者:
Dai MS
Dai MS
中科院分区:
其他
文献类型:
--
作者:
Li Y;Challagundla KB;Sun XX;Zhang Q;Dai MS

文献摘要

参考文献

相似文献

癌蛋白 c-Myc 对于细胞生长和增殖至关重要,而其过度表达失调与大多数人类癌症有关。因此,严格调节 c-Myc 的水平和活性对于维持正常细胞稳态至关重要。 c-Myc 会因多种压力而下调,包括紫外线引起的 DNA 损伤。然而,紫外线诱导 c-Myc 减少的机制尚不完全清楚。在这里,我们报告 L11 促进 miR-130a 靶向 c-myc mRNA,以抑制 c-Myc 表达以响应紫外线照射。 miR-130a 靶向 c-myc mRNA 的 3' 非翻译区 (UTR)。 miR-130a 的过表达促进 Ago2 与 c-myc mRNA 结合,显着降低 c-Myc 蛋白和 mRNA 的水平并抑制细胞增殖。紫外线处理显着促进细胞中 L11 与 miR-130a、c-myc mRNA 以及 Ago2 的结合。抑制 miR-130a 可显着抑制 UV 介导的 c-Myc 减少。我们进一步表明,在紫外线处理后,L11 从核仁重新定位到细胞质,在细胞质中与 c-myc mRNA 结合。总之,这些结果揭示了 c-Myc 下调响应 UV 介导的 DNA 损伤的新机制,其中 L11 促进装载 miR-130a 的 miRISC 靶向 c-myc mRNA。
The oncoprotein c-Myc is essential for cell growth and proliferation while its deregulated overexpression is associated with most human cancers. Thus tightly regulated levels and activity of c-Myc are critical for maintaining normal cell homeostasis. c-Myc is down-regulated in response to several types of stress, including UV-induced DNA damage. Yet, mechanism underlying UV-induced c-Myc reduction is not completely understood. Here we report that L11 promotes miR-130a targeting of c-myc mRNA to repress c-Myc expression in response to UV irradiation. miR-130a targets the 3′-untranslated region (UTR) of c-myc mRNA. Overexpression of miR-130a promotes the Ago2 binding to c-myc mRNA, significantly reduces the levels of both c-Myc protein and mRNA and inhibits cell proliferation. UV treatment markedly promotes the binding of L11 to miR-130a, c-myc mRNA as well as Ago2 in cells. Inhibiting miR-130a significantly suppresses UV-mediated c-Myc reduction. We further show that L11 is relocalized from the nucleolus to the cytoplasm where it associates with c-myc mRNA upon UV treatment. Together, these results reveal a novel mechanism underlying c-Myc down-regulation in response to UV-mediated DNA damage, wherein L11 promotes miR-130a-loaded miRISC to target c-myc mRNA.
DOI: 10.1158/0008-5472.can-11-3671
发表时间: 2012-04-01
期刊: CANCER RESEARCH
影响因子: 11.2
作者:
Kovaleva, Valentina;Mora, Rodrigo;Seiffert, Martina
通讯作者: Seiffert, Martina
DOI: 10.1016/j.molcel.2009.08.020
发表时间: 2009-09-11
期刊: Molecular cell
影响因子: 16
作者:
Lal A;Navarro F;Maher CA;Maliszewski LE;Yan N;O'Day E;Chowdhury D;Dykxhoorn DM;Tsai P;Hofmann O;Becker KG;Gorospe M;Hide W;Lieberman J
通讯作者: Lieberman J
DOI: 10.4161/cc.7.1.5111
发表时间: 2008-01-01
期刊: CELL CYCLE
影响因子: 4.3
作者:
Britton, Sebastien;Salles, Bernard;Calsou, Patrick
通讯作者: Calsou, Patrick
DOI: 10.1016/j.cell.2013.03.043
发表时间: 2013-04-25
期刊: Cell
影响因子: 64.5
作者:
Helwak A;Kudla G;Dudnakova T;Tollervey D
通讯作者: Tollervey D
DOI: 10.1016/j.cell.2009.04.050
发表时间: 2009-05-15
期刊: Cell
影响因子: 64.5
作者:
Kruse JP;Gu W
通讯作者: Gu W