Fitting mathematical models of biochemical pathways to steady state perturbation response data without simulating perturbation experiments.

Abstract:

:Fitting Ordinary Differential Equation (ODE) models of signal transduction networks (STNs) to experimental data is a challenging problem. Computational parameter fitting algorithms simulate a model many times with different sets of parameter values until the simulated STN behaviour match closely with experimental data. This process can be slow when the model is fitted to measurements of STN responses to numerous perturbations, since this requires simulating the model as many times as the number of perturbations for each set of parameter values. Here, I propose an approach that avoids simulating perturbation experiments when fitting ODE models to steady state perturbation response (SSPR) data. Instead of fitting the model directly to SSPR data, it finds model parameters which provides a close match between the scaled Jacobian matrices (SJM) of the model, which are numerically calculated using the model's rate equations and estimated from SSPR data using modular response analysis (MRA). The numerical estimation of SJM of an ODE model does not require simulating perturbation experiments, saving significant computation time. The effectiveness of this approach is demonstrated by fitting ODE models of the Mitogen Activated Protein Kinase (MAPK) pathway using simulated and real SSPR data.

journal_name

Sci Rep

journal_title

Scientific reports

authors

Santra T

doi

10.1038/s41598-018-30118-0

subject

Has Abstract

pub_date

2018-08-03 00:00:00

pages

11679

issue

1

issn

2045-2322

pii

10.1038/s41598-018-30118-0

journal_volume

8

pub_type

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