ATVB:长非编码RNA MYOSLID在血管平滑肌分化中的作用

2017-03-29 MedSci MedSci原创

长非编码RNA(lncRNA)代表不同类型的具有不同细胞功能的非编码基因。我们以前报道了SENCR,一种似乎支持血管平滑肌细胞(VSMC)收缩表型的lncRNA。然而,由心肌素(MYOCD)/血清反应因子(VSMC分化的主开关)调节的VSMC特异性lncRNA仍是未知的。近期来自中国农业科学院的学者探究了这一过程,发表题为《一种新型血清反应因子依赖型长非编码RNA MYOSLID扩增血管平滑肌分化

长非编码RNA(lncRNA)代表不同类型的具有不同细胞功能的非编码基因。我们以前报道了SENCR,一种似乎支持血管平滑肌细胞(VSMC)收缩表型的lncRNA。然而,由心肌素(MYOCD)/血清反应因子(VSMC分化的主开关)调节的VSMC特异性lncRNA仍是未知的。

来自中国农业科学院的学者探究了这一过程,发表题为《一种新型血清反应因子依赖型长非编码RNA MYOSLID扩增血管平滑肌分化程序》于著名血管杂志Arterioscler Thromb Vasc Biol。

为了确定具有VSMC分化功能的新型lncRNA,我们在过表达MYOCD的人冠状动脉SMC中进行RNA测序。MYOCD过表达改变了若干种新型lncRNA的表达,一个被命名为MYOSLID的lncRNA可被MYOCD激活并在VSMC中选择性表达。MYOSLID是MYOCD/血清反应因子和转化生长因子-β/SMAD途径的直接转录靶标。功能研究显示MYOSLID促进VSMC分化并抑制VSMC增殖。与健康静脉相比,MYOSLID在失败的人动静脉瘘标本中表达降低。虽然MYOSLID不影响转录因子(如血清反应因子和MYOCD)的基因表达,但敲除MYOSLID破坏了VSMCs肌动蛋白纤维形成,并阻断MYOCD相关转录因子A(MKL1)核移位。最后,MYOSLID缺失抑制了转化生长因子-β诱导的SMAD2磷酸化。

研究结果证明,MYOSLID是第一个人VSMC选择性的,血清反应因子/CArG依赖性的lncRNA,通过MKL1和转化生长因子-β/SMAD的前馈作用扩增VSMC分化程序的新型调节途径。

原始出处:

Zhao J, Zhang W.et al. MYOSLID Is a Novel Serum Response Factor-Dependent Long Noncoding RNA That Amplifies the Vascular Smooth Muscle Differentiation Program. Arterioscler Thromb Vasc Biol. 2016 Oct;36(10):2088-99.

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    2017-04-07 d830384
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    2017-05-24 gongliu
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