Stabilization of oncogenic transcripts by the IGF2BP3/ELAVL1 complex promotes tumorigenicity in colorectal cancer.

Stabilization of oncogenic transcripts by the IGF2BP3/ELAVL1 complex promotes tumorigenicity in colorectal cancer.
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IGF2BP3/ELAVL1 复合物对致癌转录物的稳定可促进结直肠癌的致瘤性。

DOI:
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发表时间:
2020-08
影响因子:
5.3
通讯作者:
Changzhi Huang
Changzhi Huang
中科院分区:
医学3区
文献类型:
--
作者:
Kexin Li;Furong Huang;Yan Li;Dongdong Li;Hong Lin;Ruo-Xuan Ni;Qiao Zhang;Mei Zhao;Shengkai Huang;Liang Zou;Changzhi Huang

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RNA结合蛋白(RBP)的表达在结直肠癌(CRC)和其他类型的癌症中失调。在RBP中,胰岛素样生长因子-2信使RNA结合蛋白(IGF 2BP 1 -3)家族参与结肠的发展和CRC的进展。然而,IGF 2BP 3在CRC中对mRNA命运的调节仍然不太清楚。在这里,我们表明IGF 2BP 3与ELAVL 1相互作用,共同调节一组参与细胞周期和细胞增殖的基因。从机制上讲,IGF 2BP 3/ELAVL 1复合物对这些mRNA的识别导致mRNA分子的半衰期延长和靶基因表达增加,从而驱动CRC细胞增殖。有趣的是,IGF 2BP 3或ELAVL 1的敲低损害了IGF 2BP 3/ELAVL 1复合物增强的mRNA稳定性,表明CRC中IGF 2BP 3和ELAVL 1之间的功能相互依赖性。我们的研究结果揭示了IGF 2BP 3调节mRNA稳定性的分子机制,并确定了IGF 2BP 3/ELAVL 1复合物作为CRC新治疗靶点的协同作用。
The expression of RNA-binding proteins (RBPs) is dysregulated in colorectal cancer (CRC) and in other types of cancer. Among the RBPs, the insulin-like growth factor-2 messenger RNA binding protein (IGF2BP1-3) family is involved in the development of the colon and the progression of CRC. However, the regulation of mRNA fate by IGF2BP3 in CRC remains less well understood. Here, we show that IGF2BP3 interacts with ELAVL1 to coregulate a cohort of genes involved in the cell cycle and cell proliferation. Mechanistically, recognition of these mRNAs by the IGF2BP3/ELAVL1 complex leads to prolonged half-lives of the mRNA molecules and increased expression of the target genes, thereby driving CRC cell proliferation. Interestingly, knockdown of either IGF2BP3 or ELAVL1 impairs the IGF2BP3/ELAVL1 complex-enhanced mRNA stability, suggesting a functional interdependency between IGF2BP3 and ELAVL1 in CRC. Our findings reveal the molecular mechanism by which IGF2BP3 regulates mRNA stability and identify the cooperativity of the IGF2BP3/ELAVL1 complex as a novel therapeutic target in CRC.
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