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Article Dans Une Revue Mathematical Population Studies Année : 2010

When a collective outcome triggers a rare individual event: A mode of metastatic process in a cell population

Résumé

A model of early metastatic process is based on the role of the protein PAI-1, which at high enough extracellular concentration promotes the transition of cancer cells to a state prone to migration. This transition is described at the single cell level as a bi-stable switch associated with a subcritical bifurcation. In a multilevel reaction-diffusion scenario, the micro-environment of the tumor is modified by the proliferating cell population so as to push the concentration of PAI-1 above the bifurcation threshold. The formulation in terms of partial differential equations fails to capture spatio-temporal heterogeneity. Cellular-automata and agent-based simulations of cell populations support the hypothesis that a randomly localized accumulation of PAI-1 can arise and trigger the escape of a few isolated cells. Far away from the primary tumor, these cells experience a reverse transition back to a proliferative state and could generate a secondary tumor. The suggested role of PAI-1 in controlling this metastatic cycle is candidate to explain its role in the progression of cancer.
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Dates et versions

hal-00760141 , version 1 (03-12-2012)

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Michel Malo, Amandine Cartier-Michaud, Elisabeth Fabre-Guillevin, Guillaume Hutzler, Franck Delaplace, et al.. When a collective outcome triggers a rare individual event: A mode of metastatic process in a cell population. Mathematical Population Studies, 2010, 17 (3), pp.136--165. ⟨10.1080/08898480.2010.490996⟩. ⟨hal-00760141⟩
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