Cell mechanosensitivity controls the anisotropy of focal adhesions - PubMed (original) (raw)

Cell mechanosensitivity controls the anisotropy of focal adhesions

Alice Nicolas et al. Proc Natl Acad Sci U S A. 2004.

Erratum in

Proc Natl Acad Sci U S A. 2005 Feb 8;102(6):2260

Abstract

Cellular adhesions are modulated by cytoskeletal forces or external stresses and adapt to the mechanical properties of the extracellular matrix. We propose that this mechanosensitivity can be driven at least in part by the elastic, cell-contractility-induced deformations of protein molecules that form the adhesion. The model accounts for observations of anisotropic growth and shrinkage of focal adhesions in the direction of the force and predicts that focal adhesions only grow within a range of force that is determined by the composition and matrix properties. This prediction is consistent with the observations of a force threshold for the appearance of elongated focal adhesions and the disruption of adhesions into fibrils on a mobile extracellular matrix. The growth dynamics is calculated and the predicted sliding of focal adhesions is consistent with several experiments.

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Figures

Fig. 1.

Schematic representation of a FA.

Fig. 2.

One-dimensional chain of interacting particles bound to anchors as a model for FAs grafted to an extracellular matrix. The potential V(x) accounts for the grafting properties of the extracellular matrix. The distance a between the anchors is the integrin–integrin spacing, and un is the displacement of the _n_th particle from its position in the absence of force.

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Cell mechanosensitivity controls the anisotropy of focal adhesions - PubMed (original) (raw)