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arXiv 2409.04772physics.bio-phq-bio.CB
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建模板状伪足驱动的细胞如何维持持续迁移并与外部屏障相互作用

Modelling how lamellipodia-driven cells maintain persistent migration and interact with external barriers

Shubhadeep Sadhukhan, Cristina Martinez-Torres, Samo Penič, Carsten Beta, Aleš Iglič, Nir S Gov

AI总结:

该研究在含弯曲活性蛋白的三维囊泡“最小细胞”模型中引入UCSP长程抑制机制,以稳定板状伪足样运动极性,并解释细胞速度、形态、屏障散射和几何约束振荡等动力学。

摘要:

细胞运动是许多生物学过程的基础,细胞表现出多种多样的迁移模式。许多运动细胞类型遵循一条将其速度与持续性联系起来的普遍规律,这一性质可能源于全局肌动蛋白逆行流导致的极性线索的细胞内运输。该机制被称为“细胞速度与持续性之间的普遍耦合”(UCSP)。在此,我们在一个粗粒化的“最小细胞”模型中实现了UCSP机制的简化版本,该模型由一个包含弯曲活性蛋白的三维囊泡组成。该模型会自发形成类似板状伪足的运动细胞形态,但这种形态较为敏感,可能由于随机涨落或在与外部障碍物相互作用时去极化,变为非运动形式。UCSP的实现引入了长程抑制,从而稳定了运动表型。这使我们的模型能够描述在细胞中观察到的稳健极性,并解释多种多样的细胞动力学,例如细胞速度与长宽比之间的关系、细胞—屏障散射,以及不同类型几何约束中的细胞振荡。

英文摘要:

Cell motility is fundamental to many biological processes, and cells exhibit a variety of migration patterns. Many motile cell types follow a universal law that connects their speed and persistency, a property that can originate from the intracellular transport of polarity cues due to the global actin retrograde flow. This mechanism was termed the ``Universal Coupling between cell Speed and Persistency"(UCSP). Here we implemented a simplified version of the UCSP mechanism in a coarse-grained ``minimal-cell" model, which is composed of a three-dimensional vesicle that contains curved active proteins. This model spontaneously forms a lamellipodia-like motile cell shape, which is however sensitive and can depolarize into a non-motile form due to random fluctuations or when interacting with external obstacles. The UCSP implementation introduces long-range inhibition, which stabilizes the motile phenotype. This allows our model to describe the robust polarity observed in cells and explain a large variety of cellular dynamics, such as the relation between cell speed and aspect ratio, cell-barrier scattering, and cellular oscillations in different types of geometric confinements.

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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