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arXiv 2103.12879physics.bio-ph
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形状-速度相关性定义迁移细胞模拟中的极化

Shape-velocity correlation defines polarization in migrating cell simulations

Gilberto L. Thomas, Ismael Fortuna, Gabriel C. Perrone, François Graner, Rita M. C. de Almeida

摘要:

细胞迁移在发育、伤口愈合、疾病和维持复杂机体中起着至关重要的作用。集体细胞迁移的实验通常测量诸如细胞位移和速度的量。在平面上的单细胞迁移实验中观察到的均方位移的短时间扩散制度对细胞速度的定义和测量协议提出了质疑。单细胞迁移随机建模的理论结果表明,这种快速扩散制度是由白噪声作用于垂直于迁移细胞极化轴方向上的位移(而不是速度)来解释的。预测是,只有平行于偏振轴的速度分量是一个明确定义的量,具有鲁棒的测量协议。在这里,我们问,我们是否可以找到一个迁移细胞极化的定义,能够预测细胞的后续位移,根据其形状的测量。实验证据表明,细胞核落后于细胞质心在迁移细胞的支持下,我们提出了一个强大的参数化细胞迁移的细胞核和细胞的质心之间的距离定义细胞形状极化。我们测试了所提出的方法,通过应用到模拟模型的三维细胞在CompuCell 3D环境中进行,以前显示重现生物细胞运动学迁移在一个平面上。

英文摘要:

Cell migration plays essential roles in development, wound healing, diseases, and in the maintenance of a complex body. Experiments in collective cell migration generally measure quantities such as cell displacement and velocity. The observed short-time diffusion regime for mean square displacement in single-cell migration experiments on flat surfaces calls into question the definition of cell velocity and the measurement protocol. Theoretical results in stochastic modeling for single-cell migration have shown that this fast diffusive regime is explained by a white noise acting on displacement on the direction perpendicular to the migrating cell polarization axis (not on velocity). The prediction is that only the component of velocity parallel to the polarization axis is a well-defined quantity, with a robust measurement protocol. Here, we ask whether we can find a definition of a migrating-cell polarization that is able to predict the cell's subsequent displacement, based on measurements of its shape. Supported by experimental evidence that cell nucleus lags behind the cell center of mass in a migrating cell, we propose a robust parametrization for cell migration where the distance between cell nucleus and the cell's center of mass defines cell shape polarization. We tested the proposed methods by applying to a simulation model for three-dimensional cells performed in the CompuCell3D environment, previously shown to reproduce biological cells kinematics migrating on a flat surface.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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