m6A修饰的pre-miR-503-5p通过mTOR通路的激活,有助于肌原分化
Yalong Su1, Kaiping Deng1, Zhipeng Liu1
1Sanya Research Institute of Nanjing Agricultural University, Nanjing Agricultural University, Sanya 572025, China; Jiangsu Livestock Embryo Engineering Laboratory, College of Animal Science and Technology, Nanjing Agricultural University, Nanjing 210095, China.
International journal of biological macromolecules
|January 5, 2025
概括
以ythdf2为媒介的m6A修饰通过增强miR-503-5p成熟来促进骨肌肉的发育. 这一过程激活了mTOR通路,加速了山羊初级肌细胞中的分化和线粒体生物发生.
科学领域:
- 表观遗传学和分子生物学
- 骨肌肉生理学 骨肌肉生理学
背景情况:
- 转录后调节对于骨肌肉发育至关重要.
- N6-甲基氨酸 (m6A) 修饰和microRNAs (miRNAs) 是关键调节剂,但它们在骨肌肉中的相互作用尚不清楚.
研究的目的:
- 阐明山羊骨肌肉发育中的m6A修饰和miRNA之间的相互作用.
- 调查miR-503-5p及其m6A调节在肌体分化中的作用.
主要方法:
- 在分化过程中,山羊初级肌细胞 (GPMs) 的miRNA测序.
- RNA免疫沉 (RIP),qRT-PCR和mRNA稳定性测试. 这两种测试都在进行中.
- 对miR-503-5p的过度表达研究和对mTOR通路的操纵.
主要成果:
- 在肌体分化过程中,miR-503-5p被上调,其前体含有m6A位点.
- 在pre-miR-503-5p上,Ythdf2识别并结合m6A位点,促进其成熟.
- miR-503-5p过度表达抑制了GPM增殖,促进了分化,增强了线粒体生物发生,并激活了mTOR通路.
- mTOR抑制抵消了miR-503-5p诱导的分化.
结论:
- 依赖于Ythdf2的m6A修饰促进了前-miR-503-5p的成熟,促进了骨肌肉的分化.
- 该miR-503-5p/mTOR通路是骨肌肉发育的一个关键机制.
- 这些发现为了解骨肌肉发育中的表观遗传调节提供了基础.
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