A time-dependent phenomenological model for cell mechano-sensing.

A time-dependent phenomenological model for cell mechano-sensing.
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DOI:
10.1007/s10237-013-0508-x
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发表时间:
2014-04
影响因子:
3.5
通讯作者:
Manuel Garcia-Aznar, Jose
Manuel Garcia-Aznar, Jose
中科院分区:
工程技术2区
文献类型:
--
作者:
Borau, Carlos;Kamm, Roger D.;Manuel Garcia-Aznar, Jose

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贴壁细胞通常施加力作为感知和响应其周围环境的机械性质的一般手段。这些力如何随细胞外刚性的变化而变化,对于理解驱动诸如伤口愈合或肌肉收缩等重要现象的调节功能至关重要。认识到这一事实,已经进行了实验,以了解细胞外环境已知条件下的细胞刚性感应特性,为这种主动行为的建模开辟了新的可能性。在这项工作中,我们提供了一个基于物理的本构模型,考虑到细胞的主要结构成分,以重现其最重要的收缩特性,如牵引力作为时间的函数和细胞外刚度。该模型显示了肌动蛋白收缩系统的时间依赖性反应和细胞成分的弹性反应之间的相互作用如何决定单个细胞的机械感应行为。
Adherent cells normally apply forces as a generic means of sensing and responding to the mechanical nature of their surrounding environment. How these forces vary as a function of the extracellular rigidity is critical to understanding the regulatory functions that drive important phenomena such as wound healing or muscle contraction. In recognition of this fact, experiments have been conducted to understand cell rigidity-sensing properties under known conditions of the extracellular environment, opening new possibilities for modeling this active behaviour. In this work, we provide a physics-based constitutive model taking into account the main structural components of the cell to reproduce its most significant contractile properties such as the traction forces exerted as a function of time and the extracellular stiffness. This model shows how the interplay between the time-dependent response of the acto-myosin contractile system and the elastic response of the cell components determine the mechano-sensing behaviour of single cells.
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