METTL3-Mediated m(6)A Methylation Regulates Muscle Stem Cells and Muscle Regeneration by Notch Signaling Pathway.

METTL3-Mediated m(6)A Methylation Regulates Muscle Stem Cells and Muscle Regeneration by Notch Signaling Pathway.
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METTL3 介导的 m6A 甲基化通过 Notch 信号通路调节肌肉干细胞和肌肉再生

DOI:
10.1155/2021/9955691
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发表时间:
2021
影响因子:
4.3
通讯作者:
Jiang YZ
Jiang YZ
中科院分区:
医学3区
文献类型:
--
作者:
Liang Y;Han H;Xiong Q;Yang C;Wang L;Ma J;Lin S;Jiang YZ

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Pax7+肌肉干细胞(MuSC)对于骨骼肌稳态和损伤后肌肉再生至关重要,而肌肉干细胞命运决定和肌肉再生的分子机制仍不完全清楚。 N6-甲基腺苷 (m6A) RNA 修饰由 METTL3 催化,在转录后基因表达调控和各种生物过程中发挥重要作用。在这里,我们构建了肌肉干细胞特异性METTL3条件敲除小鼠模型,并揭示了肌肉干细胞中METTL3的敲除显着抑制肌肉干细胞的增殖并阻碍损伤后的肌肉再生。此外,肌肉干细胞中METTL3的敲入可促进体内肌肉干细胞增殖和肌肉再生。从机制上讲,METTL3-m6A-YTHDF1 轴调节 Notch 信号通路的 mRNA 翻译。我们的数据证明了METTL3介导的m6A修饰在肌肉干细胞和肌肉再生中的重要体内生理功能,为干细胞相关肌肉疾病的治疗提供分子基础。
The Pax7+ muscle stem cells (MuSCs) are essential for skeletal muscle homeostasis and muscle regeneration upon injury, while the molecular mechanisms underlying muscle stem cell fate determination and muscle regeneration are still not fully understood. N6-methyladenosine (m6A) RNA modification is catalyzed by METTL3 and plays important functions in posttranscriptional gene expression regulation and various biological processes. Here, we generated muscle stem cell-specific METTL3 conditional knockout mouse model and revealed that METTL3 knockout in muscle stem cells significantly inhibits the proliferation of muscle stem cells and blocks the muscle regeneration after injury. Moreover, knockin of METTL3 in muscle stem cells promotes the muscle stem cell proliferation and muscle regeneration in vivo. Mechanistically, METTL3-m6A-YTHDF1 axis regulates the mRNA translation of Notch signaling pathway. Our data demonstrated the important in vivo physiological function of METTL3-mediated m6A modification in muscle stem cells and muscle regeneration, providing molecular basis for the therapy of stem cell-related muscle diseases.
DOI: 10.1038/nature12730
发表时间: 2014-01-02
期刊: Nature
影响因子: 64.8
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