Abstract
We develop a model for the early stages of malignant tumour invasion dueto random motility, cellular proliferation, proteolysis and haptotaxis.At early times in the absence of tumour cell diffusion, a compressedtumour layer is evident. Transient protease production-decay dynamicsand diffusion, must be present in order for the tumour concentrationpeak to be smoothed to realistic levels.
We demonstrate that invasion profiles asymptotically evolve totravelling wave solutions and that kink-like profiles, previouslythought to be due to contact inhibition and haptotaxis, can equally beexplained by cellular diffusion with a decreasing nonlinear diffusivity.
As well as generalising the model and examining its robustness, afull Lie Symmetry classification is carried out.
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Stewart, J.M., Broadbridge, P. & Goard, J.M. Symmetry Analysis and Numerical Modelling of Invasion by Malignant Tumour Tissue. Nonlinear Dynamics 28, 175–193 (2002). https://doi.org/10.1023/A:1015009016590
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DOI: https://doi.org/10.1023/A:1015009016590