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A purely mechanical model to explore amoeboid cell migration

Amoeboid cells may be different in several ways (e.g. size, compactness or habitat), but during locomotion they all constantly change shape by rapidly protruding and retracting extensions that have been originally described as pseudopods or ‘false feet’. These cells crawl in a cyclic manner like a worm, in a process that involves three main steps (Flaherty et al. 2007): (i) protrusion of the pseudopods, (ii) adhesion to the substrate and (iii) contraction of the rear edge. In this paper, we propose a 3D viscoelastic and purely mechanical continuum model of an amoeboid cell crawling on a 2D substrate.