A multiscale analysis of nutrient transport and biological tissue growth in vitro

O'Dea, RD, Nelson, MR, El Haj, AJ, Waters, SL and Byrne, HM, 2014. A multiscale analysis of nutrient transport and biological tissue growth in vitro. Mathematical Medicine and Biology. ISSN 1477-8602


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In this paper, we consider the derivation of macroscopic equations appropriate to describe the growth of biological tissue, employing a multiple-scale homogenisation method to accommodate explicitly the influence of the underlying microscale structure of the material, and its evolution, on the macroscale dynamics. Such methods have been widely used to study porous and poroelastic materials; however, a distinguishing feature of biological tissue is its ability to remodel continuously in response to local environmental cues. Here, we present the derivation of a model broadly applicable to tissue engineering applications, characterised by cell proliferation and extracellular matrix deposition in porous scaffolds used within tissue culture systems, which we use to study coupling between fluid flow, nutrient transport and microscale tissue growth. Attention is restricted to surface accretion within a rigid porous medium saturated with a Newtonian fluid; coupling between the various dynamics is achieved by specifying the rate of microscale growth to be dependent upon the uptake of a generic diffusible nutrient. The resulting macroscale model comprises a Darcy-type equation governing fluid flow, with flow characteristics dictated by the assumed periodic microstructure and surface growth rate of the porous medium, coupled to an advection–reaction equation specifying the nutrient concentration. Illustrative numerical solutions are presented to indicate the influence of microscale growth on macroscale dynamics, and to highlight the importance of including experimentally-relevant microstructural information in order to correctly determine flow dynamics and nutrient delivery in tissue engineering applications.

Item Type: Journal article
Publication Title: Mathematical Medicine and Biology
Creators: O'Dea, R.D., Nelson, M.R., El Haj, A.J., Waters, S.L. and Byrne, H.M.
Publisher: Oxford University Press on behalf of the Institute of Mathematics and its Applications
Date: 2014
ISSN: 1477-8602
Divisions: Schools > School of Science and Technology
Depositing User: EPrints Services
Date Added: 09 Oct 2015 11:16
Last Modified: 23 Aug 2016 09:14
URI: http://irep.ntu.ac.uk/id/eprint/25415

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