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arXiv 0904.2327q-bio.CBcond-mat.stat-mechphysics.bio-ph
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细胞迁移的异常动力学

Anomalous dynamics of cell migration

Peter Dieterich, Rainer Klages, Roland Preuss, Albrecht Schwab

摘要:

细胞运动,例如在胚胎发生或肿瘤转移期间,是由细胞迁移机制的多个组分的复杂相互作用引起的复杂的动力学过程。乍一看,迁移细胞的路径类似于热驱动的布朗粒子。然而,细胞迁移是一个活跃的生物过程,使正常布朗运动的表征受到质疑。通过分析野生型和突变的上皮(MDCK-F)细胞的轨迹,我们实验表明,异常动力学的特点细胞迁移。均方位移的超扩散增加、非高斯空间概率分布和速度自相关的幂律衰减是这种解释的基础。几乎所有的结果都可以用分数Klein-Kramers方程来解释,该方程允许通过几个参数对细胞迁移进行定量分类。由此,它揭示了细胞迁移装置的各个组件对细胞整体行为的影响和相对重要性。

英文摘要:

Cell movement, for example during embryogenesis or tumor metastasis, is a complex dynamical process resulting from an intricate interplay of multiple components of the cellular migration machinery. At first sight, the paths of migrating cells resemble those of thermally driven Brownian particles. However, cell migration is an active biological process putting a characterization in terms of normal Brownian motion into question. By analyzing the trajectories of wildtype and mutated epithelial (MDCK-F) cells we show experimentally that anomalous dynamics characterizes cell migration. A superdiffusive increase of the mean squared displacement, non-Gaussian spatial probability distributions, and power-law decays of the velocity autocorrelations are the basis for this interpretation. Almost all results can be explained with a fractional Klein- Kramers equation allowing the quantitative classification of cell migration by a few parameters. Thereby it discloses the influence and relative importance of individual components of the cellular migration apparatus to the behavior of the cell as a whole.

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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