在缩期间的内在机械传导许可证在多能干细胞中的血统能力
Mehdi Seif Hamouda1,2,3, Celine Labouesse2,4, George W Wylde2,5
1Cell and Developmental Biology Center, National Heart Lung and Blood Institute, National Institutes of Health, 20894 Bethesda, MD, USA.
bioRxiv : the preprint server for biology
|December 12, 2025
概括
细胞机制驱动干细胞的多能性进展. 皮质化诱导的收缩性触发了核变化,通过调节关键基因表达,使神经外皮系系承诺.
科学领域:
- 细胞生物学 细胞生物学
- 发展生物学 发展生物学
- 表观遗传学 在表观遗传学中,表观遗传学是指表观遗传学.
背景情况:
- 多能干细胞从天真多能性过渡到血统能力,以实现多血统差异化.
- 这种过渡涉及上皮质化和核架构改造.
- 细胞和组织力学在这一过程中的作用仍然不清楚.
研究的目的:
- 为了调查表皮化机制是否驱动多能性进展和神经外皮系系承诺.
- 了解早期干细胞分化过程中对机械线索的核反应.
主要方法:
- 使用小鼠胚胎干细胞 (mESCs) 在试验室进行分化.
- 分析了上皮质化的特征,包括顶端收缩.
- 评估核反应机制,包括蛋白质局部化 (emerin,SUN2) 和染色质修饰 (H3K9me3,H3K27me3).
- 研究了肌酸二,LINC复合体和素在血统原始化中的作用.
主要成果:
- 经过分化的原始mESCs进行了复合的上皮质化与尖端收缩.
- 细胞收缩性诱导的核变化:埃默林丰富,SUN2定位,H3K9me3损失和H3K27me3增加.
- 神经外皮谱系的原始化需要肌酸二的收缩性,LINC复合体和化物.
- 在Sox1基因上通过Emerin调节的H3K27me3进行LINC依赖的机械转导.
结论:
- 皮质化诱导的核机械转导对于多能性进展至关重要.
- 机械线索调节染色质的修饰,使神经外皮系谱能力.
- 一个涉及埃梅林和LINC复合物的机械开关控制了关键基因表达,以实现血统承诺.
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