一个边界驱动的组织形态发生的模型
Daniel S Alber1,2, Shiheng Zhao3,4,5, Alexandre O Jacinto6
1Department of Chemical and Biological Engineering, Princeton University, Princeton, NJ 08540.
概括
发育过程中的组织变形可能是被动的. 这项研究使用Drosophila后肠来展示边界力通过机械过程驱动复杂的形状变化,比如三角形钥匙孔.
科学领域:
- 发育生物学 发展生物学
- 生物物理学的生物物理.
- 形态发生 形态发生 形态发生
背景情况:
- 形态发生过程中的组织变形是由内部活跃过程或外部被动边界应力驱动的.
- 德洛索菲拉后肠原始提供了一个模型来研究边界驱动的组织形态发生.
研究的目的:
- 为了表征Drosophila hindgut primordium的3D变形. 为了表征Drosophila hindgut primordium的3D变形.
- 为了确定复杂的后肠形状变化是否是由被动边界力造成的.
- 为了建模这些变形的机械基础.
主要方法:
- 在Drosophila hindgut.gut.中3D组织变形的表征.
- 在圆形表面上构建最小弹性环模型.
- 使用轮分析量化组织动力学.
- 在边界条件下的被动变形的建模.
主要成果:
- 在3D变形过程中,Drosophila后肠表现出中间的"三角钥匙孔"形状.
- 一个极小的模型强大地捕捉了这种破坏对称性的形状变化.
- 后肠变形发生在两个阶段:表面转换和快速形状对称性破坏.
- 观察到的动力学与被动变形模型是一致的.
结论:
- 复杂的后肠形态发生可能是周围活跃胚胎组织变形的被动后果.
- 统一的边界条件足以产生不统一的形状变化.
- 这种被动机制为理解胚芽孔等价形状和发育过程中的全球形态提供了一个框架.
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