Article (Scientific journals)
Maximizing neotissue growth kinetics in a perfusion bioreactor: An in silico strategy using model reduction and Bayesian optimization
Mehrian, Mohammad; Guyot, Y.; Papantoniou, I. et al.
2017In Biotechnology and Bioengineering
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Keywords :
Bayesian optimization; Bone tissue engineering; Computational model; Shear stress; Three dimensional computer graphics; Tissue engineering; Bioprocess optimization; Extracellular matrices; Optimization techniques
Abstract :
[en] In regenerative medicine, computer models describing bioreactor processes can assist in designing optimal process conditions leading to robust and economically viable products. In this study, we started from a (3D) mechanistic model describing the growth of neotissue, comprised of cells, and extracellular matrix, in a perfusion bioreactor set-up influenced by the scaffold geometry, flow-induced shear stress, and a number of metabolic factors. Subsequently, we applied model reduction by reformulating the problem from a set of partial differential equations into a set of ordinary differential equations. Comparing the reduced model results to the mechanistic model results and to dedicated experimental results assesses the reduction step quality. The obtained homogenized model is 105 fold faster than the 3D version, allowing the application of rigorous optimization techniques. Bayesian optimization was applied to find the medium refreshment regime in terms of frequency and percentage of medium replaced that would maximize neotissue growth kinetics during 21 days of culture. The simulation results indicated that maximum neotissue growth will occur for a high frequency and medium replacement percentage, a finding that is corroborated by reports in the literature. This study demonstrates an in silico strategy for bioprocess optimization paying particular attention to the reduction of the associated computational cost. © 2017 Wiley Periodicals, Inc.
Disciplines :
Engineering, computing & technology: Multidisciplinary, general & others
Author, co-author :
Mehrian, Mohammad ;  Université de Liège - ULiège > Département d'aérospatiale et mécanique > Génie biomécanique
Guyot, Y.;  Biomechanics Research UnitGIGA In Silico MedicineUniversity of LiègeLiègeBelgium, PrometheusThe Division of Skeletal Tissue EngineeringKU LeuvenLeuvenBelgium
Papantoniou, I.;  PrometheusThe Division of Skeletal Tissue EngineeringKU LeuvenLeuvenBelgium, Skeletal Biology and Engineering Research CenterKU LeuvenLeuvenBelgium
Olofsson, S.;  Department of ComputingImperial College LondonLondonUnited Kingdom
Sonnaert, M.;  PrometheusThe Division of Skeletal Tissue EngineeringKU LeuvenLeuvenBelgium, Department of Metallurgy and Materials EngineeringKU LeuvenLeuvenBelgium
Misener, R.;  Department of ComputingImperial College LondonLondonUnited Kingdom
Geris, Liesbet  ;  Université de Liège - ULiège > Département d'aérospatiale et mécanique > Génie biomécanique
Language :
English
Title :
Maximizing neotissue growth kinetics in a perfusion bioreactor: An in silico strategy using model reduction and Bayesian optimization
Publication date :
04 December 2017
Journal title :
Biotechnology and Bioengineering
ISSN :
0006-3592
eISSN :
1097-0290
Publisher :
John Wiley and Sons Inc.
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 23 January 2018

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