背部前身细胞传递表皮力力,以延伸斑马鱼的记弦
Christopher Small1, Margot Kossmann Williams1
1Center for Precision Environmental Health and Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston TX.
bioRxiv : the preprint server for biology
|November 24, 2025
概括
背前者细胞 (DFCs) 在斑马鱼胃化过程中,机械地将包裹层与心弦连接起来. DFCs的损失会损害心弦收和延伸 (C&E),突出显示它们在强壮形态发生过程中的关键作用.
科学领域:
- 发展生物学 发展生物学
- 细胞生物学 细胞生物学
- 生物物理学的生物物理.
背景情况:
- 收和延伸 (C&E) 运动对于胚胎轴延长和胃流动期间组织收窄至关重要.
- 虽然细胞间隔驱动C&E,但周围组织的外部力量也对形态发生有所贡献.
- 在斑马鱼中,前弦板的机械力量有助于前弦延伸,同时有助于细胞间隙.
研究的目的:
- 为了研究一种新型的音节带形态发生的模型,涉及通过背部先驱细胞 (DFC) 传递的机械力.
- 确定DFCs在合表皮力力与后侧记脉的作用.
- 了解DFC如何影响胃流动期间的心弦收和延伸 (C&E).
主要方法:
- 使用了缺乏DFC的斑马鱼突变体 (crb2a,sox32损失).
- 采用自动图像细分和细胞形状分析来量化细胞延长.
- 在斑马鱼的胚胎实验中进行了实验,缺乏表皮质来分离细胞内在的行为.
主要成果:
- 由于crb2a或sox32突变而导致的DFC损失,在特定突变背景下降低了音符C&E,并恶化了轴延伸缺陷.
- 当DFCs缺席或分散时,后侧记带细胞无法正常延长.
- C&E通常发生在缺乏表皮质的探索物中,这表明DFC对于传递外部力的必要性.
结论:
- DFCs充当一个物理链接,将机械性表皮力传递到后侧记节.
- 这种由DFCs介导的机械合对于在胃流动过程中强大的音节带形态发生是至关重要的.
- 这些发现支持一个模型,DFCs将细胞外部的力量与细胞内在的行为相结合,以获得适当的记忆带发育.
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