通过细胞分裂和细胞命运调节的相互作用,在上皮层中出现的顺序
1School of Mathematical Sciences, University of Southampton, Southampton, United Kingdom.
PLoS computational biology
|October 14, 2024
概括
干细胞在自我更新和分化之间的命运选择是由细胞对细胞信号调节的. 我们的模型显示,对称的分裂促进了细胞类型的排序,而横向的抑制可以创建棋盘模式.
科学领域:
- 干细胞生物学 干细胞生物学
- 发育生物学是发展生物学.
- 数学建模的数学建模
背景情况:
- 干细胞命运决定,平衡自我更新和分化,对于组织发育和维护至关重要.
- 分泌信号传递,涉及直接的细胞与细胞接触,在调节这些命运选择方面发挥着重要作用.
- 了解这些过程如何相互作用是理解组织组织的关键.
研究的目的:
- 研究如何细胞分裂,细胞命运决策和分泌信号影响细胞类型在自我更新的上皮组织中的宏观排列.
- 探索在简化空间模型中出现不同细胞排序模式的条件.
主要方法:
- 在二维网格上开发空间细胞命运模型.
- 模拟细胞分裂,直接命运承诺与授权分化,并配信号 (侧向抑制和诱导).
- 分析不同模型参数下的细胞类型的模式形成和宏观排序.
主要成果:
- 同样的细胞类型的宏观斑块形成时,细胞在分裂后直接犯下命运,只要发生一些对称的分裂,除非信号是横向抑制.
- 通过"许可"的分化 (允许回归原始状态),宏观秩序需要信号强度超过一个值;横向的感应也会导致补丁.
- 侧向抑制可以产生棋盘模式,如果对称的划分是罕见的.
结论:
- 细胞分裂对称性,信号类型 (抑制/诱导) 和命运承诺的时间 (直接与授权) 之间的相互作用决定了出现的组织模式.
- 该模型提供了关于局部细胞行为如何导致大规模组织组织的见解,类似于物理学中的相位过渡.
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