首页> 美国卫生研究院文献>Molecular Therapy. Nucleic Acids >Circular RNA TTN Acts As a miR-432 Sponge to Facilitate Proliferation and Differentiation of Myoblasts via the IGF2/PI3K/AKT Signaling Pathway
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Circular RNA TTN Acts As a miR-432 Sponge to Facilitate Proliferation and Differentiation of Myoblasts via the IGF2/PI3K/AKT Signaling Pathway

机译:环形RNA TTN充当miR-432海绵通过IGF2 / PI3K / AKT信号通路促进成肌细胞的增殖和分化

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摘要

Circular RNAs (circRNAs) are ubiquitous endogenous RNA found in various organisms that can regulate gene expression in eukaryotes. However, little is known about potential roles for circRNAs in muscle development. We analyzed circRNA sequencing data of bovine skeletal muscle tissue and found differential expression of ( ) in fetal and adult bovine muscle tissue. We then further studied the role of in bovine muscle development. Overexpression and inhibition of together elicited its promoting roles in proliferation and differentiation of bovine primary myoblasts. Mechanistically, showed interaction with miR-432 by luciferase screening and RNA immunoprecipitation (RIP) assays. Additionally, miR-432 is a regulator of insulin-like growth factor 2 ( ), as indicated by luciferase activity, quantitative real-time PCR, and western blotting assays. Increased miR-432 expression inhibited the expression of , but this effect was remitted by . Conclusively, our results showed that promoted proliferation and differentiation of bovine primary myoblasts via competitively combining with miR-432 to activate the /phosphatidylinositol 3-kinase ( / signaling pathway.
机译:环状RNA(circRNA)是在各种生物中普遍存在的内源RNA,可以调节真核生物中的基因表达。但是,关于circRNA在肌肉发育中的潜在作用知之甚少。我们分析了牛骨骼肌组织的circRNA测序数据,发现胎儿和成年牛肌肉组织中()的差异表达。然后,我们进一步研究了牛肌肉发育中的作用。过度表达和抑制共同引起其在牛原代成肌细胞增殖和分化中的促进作用。机械上,通过萤光素酶筛选和RNA免疫沉淀(RIP)分析显示与miR-432相互作用。另外,如荧光素酶活性,实时荧光定量PCR和Western blot分析所示,miR-432是胰岛素样生长因子2()的调节剂。增加的miR-432表达抑制了其表达,但这种作用得以缓解。总之,我们的结果表明,通过与miR-432竞争性结合以激活/磷脂酰肌醇3-激酶(/信号通路),促进了牛原代成肌细胞的增殖和分化。

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