Classifying the expansion kinetics and critical surface dynamics of growing cell populations

Details Classifying the expansion kinetics and critical surface dynamics of growing cell populations Classifying the expansion kinetics and critical surface dynamics of growing cell populations

2006-10-19

arxiv.org/abs/physics/0610146v1

Physics

Biological Physics

Scientific paper

10.1103/PhysRevLett.99.248101

Based on a cellular automaton model the growth kinetics and the critical surface dynamics of cell monolayers is systematically studied by variation of the cell migration activity, the size of the proliferation zone and the cell cycle time distribution over wide ranges. The model design avoids lattice artifacts and ensures high performance. The monolayer expansion velocity derived from our simulations can be interpreted as a generalization of the velocity relationship for a traveling front in the Fisher-Kolmogorov-Petrovskii-Piskounov (FKPP) equation that is frequently used to model tumor growth phenomena by continuum models. The critical surface dynamics corresponds to the Kardar-Parisi-Zhang (KPZ) universality class for all parameters and model variations studied. While the velocity agrees quantitatively with experimental observations by Bru et al, the critical surface dynamics is in contrast to their interpretation as generic molecular-beam-epitaxy-like growth.

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