Rounding of aggregates of biological cells: Experiments and simulations

Details Rounding of aggregates of biological cells: Experiments and simulations Rounding of aggregates of biological cells: Experiments and simulations

2004-11-25

arxiv.org/abs/cond-mat/0411647v2

Physics

Condensed Matter

Soft Condensed Matter

Scientific paper

10.1016/j.physa.2005.02.008

The influence of surface tension and size on rounding of cell aggregates are studied using chick embryonic cells and numerical simulations based on the cellular Potts model. Our results show exponential relaxation in both cases as verified in previous studies using 2D Hydra cell aggregates. The relaxation time decreases with higher surface tension as expected from hydrodynamics laws. However, it increases faster than linearly with aggregate size. The results provide an additional support to the validity of the cellular Potts model for non-equilibrium situations and indicate that aggregate shape relaxation is not governed by the hydrodynamics of viscous liquids.

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