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Pressure-driven collective growth mechanism of planar cell colonies

Urheber*innen

Metzner,  C.
External Organizations;

Lange,  J.
External Organizations;

Krauss,  P.
External Organizations;

/persons/resource/Nico.Wunderling

Wunderling,  Nico
Potsdam Institute for Climate Impact Research;

Übelacker,  J.
External Organizations;

Martin,  F.
External Organizations;

Fabry,  B.
External Organizations;

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Zitation

Metzner, C., Lange, J., Krauss, P., Wunderling, N., Übelacker, J., Martin, F., Fabry, B. (2018): Pressure-driven collective growth mechanism of planar cell colonies. - Journal of Physics D: Applied Physics, 51, 304004.
https://doi.org/10.1088/1361-6463/aace4c


Zitierlink: https://publications.pik-potsdam.de/pubman/item/item_23037
Zusammenfassung
The growth of cell colonies is determined by the migration and proliferation of the individual cells. This is often modeled with the Fisher–Kolmogorov (FK) equation, which assumes that cells diffuse independently from each other, but stop to proliferate when their density reaches a critial limit. However, when using measured, cell-line specific parameters, we find that the FK equation drastically underestimates the experimentally observed increase of colony radius with time. Moreover, cells in real colonies migrate radially outward with superdiffusive trajectories, in contrast to the assumption of random diffusion. We demonstrate that both dicrepancies can be resolved by assuming that cells in dense colonies are driven apart by repulsive, pressure-like forces. Using this model of proliferating repelling particles, we find that colony growth exhibits different dynamical regimes, depending on the ratio between a pressure-related equilibrium cell density and the critial density of proliferation arrest.