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诺奇1信号对多能干细胞肌肉移植和成熟的影响
Aline M S Yamashita1, Bayardo I Garay1, Hyunkee Kim1
1Lillehei Heart Institute, Department of Medicine, University of Minnesota, Minneapolis, MN, USA.
Stem cell reports
|January 31, 2025
概括
诺奇1信号增强了卫星细胞移植和肌肉纤维成熟. 它的缺失会损害卫星细胞向适当位置定位,这表明Notch1对于体内肌肉再生至关重要.
科学领域:
- 肌肉干细胞生物学 肌肉干细胞生物学
- 骨肌肉的再生和再生
- 发育生物学是发展生物学.
背景情况:
- 由Pax3诱导的多能干细胞衍生而来的肌原性祖先表现出胚胎的特征.
- 这种签名在移植后转移到产后状态,与Notch信号相关.
- 诺奇1在这种体内成熟过程中的作用尚不清楚.
研究的目的:
- 调查NOTCH1在可诱导Pax3 (iPax3) 肌源性原始体体体内成熟中的需求.
- 阐明Notch1信号在卫星细胞定位和肌肉纤维发育中的功能.
主要方法:
- 在可诱导的Pax3 (iPax3) 肌源性原始体上进行了功能增益和丧失研究.
- 将改性原始体移植到接受者小鼠中.
- 对来自供体的纤维,卫星细胞移植和卫星细胞在二次移植中的定位进行分析.
- 对NOTCH1-修改的卫星细胞进行转录分析.
主要成果:
- 诺奇1信号没有改变来自捐赠者的肌肉纤维数量.
- NOTCH1过度表达增强了卫星细胞的移植,并促进了更成熟的肌肉纤维的形成.
- 缺少Notch1导致卫星细胞定位受损,在二次移植中发现的细胞位于间歇空间.
- 转录分析表明,Notch1影响卫星细胞中的细胞外基质组织,细胞循环和新陈代谢.
结论:
- 在肌肉再生过程中,NOTCH1信号对适当的卫星细胞定位至关重要.
- NOTCH1促进肌肉纤维的成熟,并增强卫星细胞的移植.
- 细胞外基质,细胞循环和新陈代谢的Notch1调节可能是其在卫星细胞功能中的作用的基础.
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