Effect of adhesion geometry and rigidity on cellular force distributions

Details Effect of adhesion geometry and rigidity on cellular force distributions Effect of adhesion geometry and rigidity on cellular force distributions

2009-07-23

arxiv.org/abs/0907.4114v1

Phys Rev Lett 103, 048101 (2009)

Biology

Quantitative Biology

Cell Behavior

4 pages, Revtex with 4 figures

Scientific paper

10.1103/PhysRevLett.103.048101

The behaviour and fate of tissue cells is controlled by the rigidity and geometry of their adhesive environment, possibly through forces localized to sites of adhesion. We introduce a mechanical model that predicts cellular force distributions for cells adhering to adhesive patterns with different geometries and rigidities. For continuous adhesion along a closed contour, forces are predicted to be localized to the corners. For discrete sites of adhesion, the model predicts the forces to be mainly determined by the lateral pull of the cell contour. With increasing distance between two neighboring sites of adhesion, the adhesion force increases because cell shape results in steeper pulling directions. Softer substrates result in smaller forces. Our predictions agree well with experimental force patterns measured on pillar assays.

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