肌肉干细胞位的定和维护需要依赖卡德林的粘附性
Margaret Hung1,2,3, Hsiao-Fan Lo1,2, Aviva G Beckmann4
1Department of Cell, Developmental, and Regenerative Biology, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA.
Development (Cambridge, England)
|March 8, 2024
概括
对于骨肌干细胞 (MuSCs) 在其利基中保持定,卡德林-素粘附至关重要. 破坏这种粘附会导致MuSCs失去静止,退出位,并耗尽,突出其在干细胞维护中的作用.
科学领域:
- 细胞生物学 细胞生物学
- 干细胞生物学 干细胞生物学
- 肌肉再生 肌肉再生
背景情况:
- 干细胞对其利基的粘附对于保持干细胞和功能至关重要.
- 骨肌肉干细胞 (MuSCs) 通过卡德林-素复合体在肌纤维上.
- 之前的研究表明,尽管N-cadherin在静止状态中的作用,但cadherins可能是不可或缺的MuSC定.
研究的目的:
- 调查卡德林-卡特宁依赖粘附对 MuSC 定和在其利基范围内维护的必要性.
- 确定β,γ,αE和αT-catenin在MuSC行为和干细胞区的完整性中的特定作用.
主要方法:
- 在MuSC中,有条件的基因去除特定的素 (β-, γ-, αE-, αT-).
- 在体内和体外分析MuSC的行为和局部化.
- 单细胞RNA测序以评估基因表达变化.
主要成果:
- 缺乏catenin的MuSCs失去了静止状态并退出其位,类似于缺乏N-/M-cadherin的细胞.
- MuSC 枯竭是通过过早的分化,重新进入和融合到肌纤维发生的.
- 卡德林-素粘附对于MuSC的定和干细胞池的保存至关重要.
结论:
- 卡德林-素-依赖的粘附性对于固骨肌肉干细胞到其位是不可或缺的.
- 这种粘附机制对于保持MuSC静止和防止干细胞枯竭至关重要.
- 独特的卡德林调节功能控制着MuSC的位定位,静止和整体维护.
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