A numerical model for durotaxis

Filippo Stefanoni (1) , Maurizio Ventre (2) , Francesco Mollica (1) , Paolo A. Netti (1)

1 Department of Engineering
2 University of Naples Federico II = Università degli studi di Napoli Federico II

Cell migration is a phenomenon that is involved in several physiological processes. In the absence of external guiding factors it shares analogies with Brownian motion. The presence of biochemical or biophysical cues, on the other hand, can influence cell migration transforming it in a biased random movement. Recent studies have shown that different cell types are able to recognize the mechanical properties of the substratum over which they move and that these properties direct the motion through a process called durotaxis. In this work a 2D mathematical model for the description of this phenomenon is presented. The model is based on the Langevin equation that has been modified to take into account the local mechanical properties of the substratum perceived by the cells. Numerical simulations of the model provide individual cell tracks, whose characteristics can be compared with experimental observations directly. The present model is solved for two important cases: an isotropic substratum, to check that random motility is recovered as a sub-case, and a biphasic substratum, to investigate durotaxis. The degree of agreement is satisfactory in both cases. The model can be a useful tool for quantifying relevant parameters of cell migration as a function of the substratum mechanical properties.

Mots clés: Cell migration; Modelling; Langevin equation; Finite element method

Domaines: Sciences du Vivant [q-bio]

Filippo Stefanoni, Maurizio Ventre, Francesco Mollica, Paolo A. Netti. A numerical model for durotaxis. Journal of Theoretical Biology, 2011, 280 (1), pp.150. ⟨10.1016/j.jtbi.2011.04.001⟩. ⟨hal-00701256⟩