c-Myc-activated USP2-AS1 suppresses senescence and promotes tumor progression via stabilization of E2F1 mRNA.

c-Myc-activated USP2-AS1 suppresses senescence and promotes tumor progression via stabilization of E2F1 mRNA.
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c-Myc 激活的 USP2-AS1 通过稳定 E2F1 mRNA 抑制衰老并促进肿瘤进展。

DOI:
10.1038/s41419-021-04330-2
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发表时间:
2021-10-27
影响因子:
9
通讯作者:
Mei Y
Mei Y
中科院分区:
生物学1区
文献类型:
--
作者:
Li B;Zhang G;Wang Z;Yang Y;Wang C;Fang D;Liu K;Wang F;Mei Y

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c-Myc癌蛋白在癌症的发生、发展和维持中起着重要作用。长链非编码RNA(lncRNA)最近成为c-Myc信号通路的关键调节因子。在这里,我们报告lncRNA USP 2-AS 1作为c-Myc的直接转录靶点。在功能上,USP 2-AS 1抑制细胞衰老,并通过诱导E2 F1表达作为致癌分子发挥作用。USP 2-AS 1与RNA结合蛋白G3 BP 1结合,促进G3 BP 1与E2 F1 3′-非翻译区的相互作用,从而导致E2 F1信使RNA的稳定。此外,USP 2-AS 1显示为通过E2 F1调节c-Myc致癌功能的介导物。总之,这些发现表明USP 2-AS 1是细胞衰老的负调节因子,也暗示USP 2-AS 1是介导c-Myc功能的重要参与者。
The c-Myc oncoprotein plays a prominent role in cancer initiation, progression, and maintenance. Long noncoding RNAs (lncRNAs) are recently emerging as critical regulators of the c-Myc signaling pathway. Here, we report the lncRNA USP2-AS1 as a direct transcriptional target of c-Myc. Functionally, USP2-AS1 inhibits cellular senescence and acts as an oncogenic molecule by inducing E2F1 expression. Mechanistically, USP2-AS1 associates with the RNA-binding protein G3BP1 and facilitates the interaction of G3BP1 to E2F1 3′-untranslated region, thereby leading to the stabilization of E2F1 messenger RNA. Furthermore, USP2-AS1 is shown as a mediator of the oncogenic function of c-Myc via the regulation of E2F1. Together, these findings suggest that USP2-AS1 is a negative regulator of cellular senescence and also implicates USP2-AS1 as an important player in mediating c-Myc function.
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