Motion of an Adhesive Gel in a Swelling Gradient: a Mechanism for Cell Locomotion

Details Motion of an Adhesive Gel in a Swelling Gradient: a Mechanism for Cell Locomotion Motion of an Adhesive Gel in a Swelling Gradient: a Mechanism for Cell Locomotion

2003-03-10

arxiv.org/abs/physics/0303038v1

Physics

Biological Physics

4 pages, 1 figure

Scientific paper

10.1103/PhysRevLett.90.168102

Motivated by the motion of nematode sperm cells, we present a model for the motion of an adhesive gel on a solid substrate. The gel polymerizes at the leading edge and depolymerizes at the rear. The motion results from a competition between a self-generated swelling gradient and the adhesion on the substrate. The resulting stress provokes the rupture of the adhesion points and allows for the motion. The model predicts an unusual force-velocity relation which depends in significant ways on the point of application of the force.

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