拓缺陷控制神经前代细胞培养中的集体动态
Kyogo Kawaguchi1,2,3, Ryoichiro Kageyama4, Masaki Sano1,3
1Department of Physics, The University of Tokyo, Bunkyo-ku, Tokyo 113-0033, Japan.
Nature
|April 14, 2017
概括
培养的神经前代细胞 (NPC) 呈现集体行为,形成具有拓缺陷的液晶形状. 这些缺陷促使细胞积聚和堆积,
科学领域:
- 生物物理
- 发育生物学
- 复原医学
背景情况:
- 培养干细胞形态和集体模式的特征在很大程度上是定性.
- 神经原生细胞 (NPC) 是对中枢神经系统发育至关重要的多能干细胞.
研究的目的:
- 量化分析培养的小鼠NPC的集体动态和新出现的模式.
- 调查拓缺陷在NPC行为和组织形成中的作用.
主要方法:
- 在不同密度下观察NPC培养.
- 高分辨率成像以捕捉单细胞的动态.
- 细胞对齐,速度场和密度模式的分析.
- 拓缺陷的量化 (+1/2 和 -1/2).
主要成果:
- 在高密度下,NPC会排列并集体移动,形成液晶形状.
- 在细胞对齐中发现了拓缺陷 (+1/2和 -1/2).
- +1/2缺陷促进了细胞的快速积累和3D的形成.
- -1/2缺陷促进了细胞逃逸,影响了密度模式.
结论:
- NPC集体动力学表现出液晶秩序与新出现的拓缺陷.
- 拓缺陷作为细胞密度的组织者,驱动组织形态发生.
- 一个涉及异性摩擦和活性力的通用机制解释了缺陷周围的密度不稳定性.
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