Cortical cell stiffness is independent of substrate mechanics.
Cortical cell stiffness is independent of substrate mechanics.
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DOI:
10.1038/s41563-020-0684-x
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发表时间:
2020-09
期刊:
影响因子:
41.2
通讯作者:
Franze K
中科院分区:
文献类型:
--
作者:
Rheinlaender J;Dimitracopoulos A;Wallmeyer B;Kronenberg NM;Chalut KJ;Gather MC;Betz T;Charras G;Franze K
Cortical stiffness is an important cellular property that changes during migration, adhesion, and growth. Previous atomic force microscopy (AFM) indentation measurements of cells cultured on deformable substrates suggested that cells adapt their stiffness to that of their surroundings. Here we show that the force applied by AFM onto cells results in a significant deformation of the underlying substrate if it is softer than the cells. This ‘soft substrate effect’ leads to an underestimation of a cell’s elastic modulus when analyzing data using a standard Hertz model, as confirmed by finite element modelling (FEM) and AFM measurements of calibrated polyacrylamide beads, microglial cells, and fibroblasts. To account for this substrate deformation, we developed the ‘composite cell-substrate model’ (CoCS model). Correcting for the substrate indentation revealed that cortical cell stiffness is largely independent of substrate mechanics, which has significant implications for our interpretation of many physiological and pathological processes.
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影响因子:
64.8
作者:
Barriga EH;Franze K;Charras G;Mayor R
通讯作者:
Mayor R
影响因子:
3.5
作者:
Harris, Andrew R.;Charras, G. T.
通讯作者:
Charras, G. T.
DOI:
10.1083/jcb.200405004
发表时间:
2004-09-13
期刊:
The Journal of cell biology
影响因子:
--
作者:
Engler AJ;Griffin MA;Sen S;Bönnemann CG;Sweeney HL;Discher DE
通讯作者:
Discher DE
影响因子:
38.3
作者:
通讯作者:
--
影响因子:
4.6
作者:
Gavara N
通讯作者:
Gavara N