LAPSE:2019.0673
Published Article
LAPSE:2019.0673
Strategic Framework for Parameterization of Cell Culture Models
Pavlos Kotidis, Cleo Kontoravdi
July 25, 2019
Global Sensitivity Analysis (GSA) is a technique that numerically evaluates the significance of model parameters with the aim of reducing the number of parameters that need to be estimated accurately from experimental data. In the work presented herein, we explore different methods and criteria in the sensitivity analysis of a recently developed mathematical model to describe Chinese hamster ovary (CHO) cell metabolism in order to establish a strategic, transferable framework for parameterizing mechanistic cell culture models. For that reason, several types of GSA employing different sampling methods (Sobol’, Pseudo-random and Scrambled-Sobol’), parameter deviations (10%, 30% and 50%) and sensitivity index significance thresholds (0.05, 0.1 and 0.2) were examined. The results were evaluated according to the goodness of fit between the simulation results and experimental data from fed-batch CHO cell cultures. Then, the predictive capability of the model was tested against four different feeding experiments. Parameter value deviation levels proved not to have a significant effect on the results of the sensitivity analysis, while the Sobol’ and Scrambled-Sobol’ sampling methods and a 0.1 significance threshold were found to be the optimum settings. The resulting framework was finally used to calibrate the model for another CHO cell line, resulting in a good overall fit. The results of this work set the basis for the use of a single mechanistic metabolic model that can be easily adapted through the proposed sensitivity analysis method to the behavior of different cell lines and therefore minimize the experimental cost of model development.
Keywords
cell culture modeling, Chinese hamster ovary cells, global sensitivity analysis, model validation, parameter estimation
Subject
Suggested Citation
Kotidis P, Kontoravdi C. Strategic Framework for Parameterization of Cell Culture Models. (2019). LAPSE:2019.0673
Author Affiliations
Kotidis P: Centre for Process Systems Engineering, Department of Chemical Engineering, Imperial College London, London SW7 2AZ, UK
Kontoravdi C: Centre for Process Systems Engineering, Department of Chemical Engineering, Imperial College London, London SW7 2AZ, UK
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Journal Name
Processes
Volume
7
Issue
3
Article Number
E174
Year
2019
Publication Date
2019-03-26
Published Version
ISSN
2227-9717
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Original Submission
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PII: pr7030174, Publication Type: Journal Article
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LAPSE:2019.0673
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doi:10.3390/pr7030174
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Jul 25, 2019
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CC BY 4.0
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Original Submitter
Calvin Tsay
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