Transforming growth factor-beta-regulated miR-24 promotes skeletal muscle differentiation.

Transforming growth factor-beta-regulated miR-24 promotes skeletal muscle differentiation.
复制标题

转化生长因子-β 调节的 miR-24 促进骨骼肌分化。

DOI:
10.1093/nar/gkn032
复制
发表时间:
2008-05
影响因子:
14.9
通讯作者:
Yang X
Yang X
中科院分区:
生物学2区
文献类型:
--
作者:
Sun Q;Zhang Y;Yang G;Chen X;Zhang Y;Cao G;Wang J;Sun Y;Zhang P;Fan M;Shao N;Yang X

文献摘要

参考文献

被引文献

相似文献

MicroRNA (miRNA) 最近被认为是一类多功能分子,参与多种生物过程的调节。然而,miRNA 在 TGF-β 调节的生物过程中的作用却很少得到解决。在这项研究中,我们发现miR-24在成肌细胞分化过程中上调,并且可以被TGF-β1抑制。使用报告基因测定和 Northern blot 分析,我们发现 TGF-β1 抑制 miR-24 转录,这依赖于 miR-24 启动子区域中 Smad3 和 Smads 结合位点的存在。 TGF-β1 无法抑制 Smad3 缺陷的成肌细胞中 miR-24 的表达,从而表现出加速的肌生成。 miR-24的敲低导致C2C12细胞中生肌分化标志物的表达减少,而miR-24的异位表达增强了分化,并通过TGF-β1部分挽救了抑制的肌生成。这是第一项证明 miRNA 在调节 TGF-β 依赖性肌生成抑制中发挥关键作用的研究,并提供了骨骼肌分化过程中 TGF-β 信号传导遗传调控的新机制。
MicroRNAs (miRNAs) have recently been proposed as a versatile class of molecules involved in regulation of a variety of biological processes. However, the role of miRNAs in TGF-β-regulated biological processes is poorly addressed. In this study, we found that miR-24 was upregulated during myoblast differentiation and could be inhibited by TGF-β1. Using both a reporter assay and Northern blot analysis, we showed that TGF-β1 repressed miR-24 transcription which was dependent on the presence of Smad3 and a Smads binding site in the promoter region of miR-24. TGF-β1 was unable to inhibit miR-24 expression in Smad3-deficient myoblasts, which exhibited accelerated myogenesis. Knockdown of miR-24 led to reduced expression of myogenic differentiation markers in C2C12 cells, while ectopic expression of miR-24 enhanced differentiation, and partially rescued inhibited myogenesis by TGF-β1. This is the first study demonstrating a critical role for miRNAs in modulating TGF-β-dependent inhibition of myogenesis, and provides a novel mechanism of the genetic regulation of TGF-β signaling during skeletal muscle differentiation.
DOI: 10.1083/jcb.200603008
发表时间: 2006-08-28
期刊: The Journal of cell biology
影响因子: --
作者:
Kim HK;Lee YS;Sivaprasad U;Malhotra A;Dutta A
通讯作者: Dutta A
DOI: 10.1006/dbio.2002.0812
发表时间: 2002-11-15
影响因子: 2.7
作者:
Amthor, H;Huang, RJ;Patel, K
通讯作者: Patel, K
DOI: 10.1101/gad.925901
发表时间: 2001-11-15
影响因子: 10.5
作者:
Liu, D;Black, BL;Derynck, R
通讯作者: Derynck, R
DOI: 10.1016/s1097-2765(00)00025-3
发表时间: 2000-08-01
期刊: MOLECULAR CELL
影响因子: 16
作者:
Lu, JR;McKinsey, TA;Olson, EN
通讯作者: Olson, EN
DOI: 10.1089/dna.2006.0556
发表时间: 2007-04-01
影响因子: 3.1
作者:
Callis, Thomas E.;Chen, Jian-Fu;Wan, Da-Zhi
通讯作者: Wan, Da-Zhi