Physical limits to biomechanical sensing in disordered fibre networks.

Physical limits to biomechanical sensing in disordered fibre networks.
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DOI:
10.1038/ncomms16096
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发表时间:
2017-07-18
影响因子:
16.6
通讯作者:
Wingreen NS
Wingreen NS
中科院分区:
综合性期刊1区
文献类型:
--
作者:
Beroz F;Jawerth LM;Münster S;Weitz DA;Broedersz CP;Wingreen NS

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Cells actively probe and respond to the stiffness of their surroundings. Since mechanosensory cells in connective tissue are surrounded by a disordered network of biopolymers, their in vivo mechanical environment can be extremely heterogeneous. Here we investigate how this heterogeneity impacts mechanosensing by modelling the cell as an idealized local stiffness sensor inside a disordered fibre network. For all types of networks we study, including experimentally-imaged collagen and fibrin architectures, we find that measurements applied at different points yield a strikingly broad range of local stiffnesses, spanning roughly two decades. We verify via simulations and scaling arguments that this broad range of local stiffnesses is a generic property of disordered fibre networks. Finally, we show that to obtain optimal, reliable estimates of global tissue stiffness, a cell must adjust its size, shape, and position to integrate multiple stiffness measurements over extended regions of space. Cells in the connective tissue are surrounded by a heterogeneous network of biopolymers. Here, the authors investigate how such heterogeneity affects cellular mechanosensing by simulating the deformation response of experimental and modelled biopolymer networks to locally applied forces.
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