Paper Info
Title
Optimal design of stimulus experiments for robust discrimination of biochemical reaction networks
Abstract
Motivation: Biochemical reaction networks in the form of coupled ordinary differential equations (ODEs) provide a powerful modeling tool for understanding the dynamics of biochemical processes. During the early phase of modeling, scientists have to deal with a large pool of competing nonlinear models. At this point, discrimination experiments can be designed and conducted to obtain optimal data for selecting the most plausible model. Since biological ODE models have widely distributed parameters due to, e.g. biologic variability or experimental variations, model responses become distributed. Therefore, a robust optimal experimental design (OED) for model discrimination can be used to discriminate models based on their response probability distribution functions (PDFs). Results: In this work, we present an optimal control-based methodology for designing optimal stimulus experiments aimed at robust model discrimination. For estimating the time-varying model response PDF, which results from the nonlinear propagation of the parameter PDF under the ODE dynamics, we suggest using the sigma-point approach. Using the model overlap (expected likelihood) as a robust discrimination criterion to measure dissimilarities between expected model response PDFs, we benchmark the proposed nonlinear design approach against linearization with respect to prediction accuracy and design quality for two nonlinear biological reaction networks. As shown, the sigma-point outperforms the linearization approach in the case of widely distributed parameter sets and/or existing multiple steady states. Since the sigma-point approach scales linearly with the number of model parameter, it can be applied to large systems for robust experimental planning. Availability: An implementation of the method in MATLAB/AMPL is available at http://www.uni-magdeburg.de/ivt/svt/person/rf/roed.html. Contact: flassig@mpi-magdeburg.mpg.de Supplementary information: Supplementary data are are available at Bioinformatics online.
Year
DOI
Venue
2012
10.1093/bioinformatics/bts585
Bioinformatics
Keywords
Field
DocType
algorithms,computational biology,nonlinear dynamics,probability
Data mining,Nonlinear system,Ordinary differential equation,Computer science,Optimal design,Probability distribution,Artificial intelligence,AMPL,Linearization,Ode,Optimal control,Algorithm,Machine learning
Journal
Volume
Issue
ISSN
28
23
1367-4803
Citations 
PageRank 
References 
6
0.60
16
Authors
2
Name
Order
Citations
PageRank
Robert J Flassig1364.76
Kai Sundmacher24912.51