细胞组的加尔瓦诺塔克斯定向性取决于组的大小
Calina Copos1, Yao-Hui Sun2, Kan Zhu2
1Department of Biology and Department of Mathematics, Northeastern University, Boston, MA 02115.
bioRxiv : the preprint server for biology
|August 26, 2024
概括
细胞的光作用,或电场中的定向迁移,取决于群体大小和PI3激酶抑制. 小小的PI3K受阻细胞群迁移到阳极,与较大的群体或不受阻碍的细胞不同.
科学领域:
- 细胞生物学 细胞生物学
- 生物物理学的生物物理.
背景情况:
- 加尔瓦诺塔克斯是电场中的定向细胞迁移,对伤口愈合和发育至关重要.
- 单个鱼类角质细胞通过阴极迁移,在PI3激酶抑制后逆向阳极迁移.
- 大型细胞群,无论PI3K状态如何,都会以阴极方式迁移.
研究的目的:
- 研究小细胞群和PI3K受阻细胞群的动行为.
- 确定细胞间相互作用和PI3K抑制如何影响集体细胞迁移方向和速度.
- 比较小型与大型细胞群的迁移动态.
主要方法:
- 观察和量化不同大小的非受抑制和PI3K受抑制的鱼类角细胞细胞组的光毒性.
- 分析移徙期间细胞群形状,大小和乳类动态的变化.
- 使用计算模型来解释观察到的集体细胞迁移行为.
主要成果:
- 小小的未抑制的细胞群通过阴极迁移;小小的PI3K抑制的细胞群通过阳极迁移.
- 小细胞群的迁移速度比大细胞群的迁移速度快;不受抑制的细胞群的迁移速度比PI3K受抑制的细胞群的迁移速度快.
- 群体迁移的方向是由内部细胞 (始终是阴极细胞) 和边缘细胞 (方向取决于PI3K状态) 之间的"拉战"决定的.
结论:
- 电场中的集体细胞迁移方向取决于大小,并由PI3激酶活性调节.
- 迁移群体中的边缘细胞表现出个性主义的加尔瓦诺塔克斯行为,而内部细胞则以阴极方向导向.
- 计算建模支持在细胞组内的差异性定向信号传递的拟议机制.
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