期刊
BIOSYSTEMS
卷 112, 期 2, 页码 171-179出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.biosystems.2013.03.001
关键词
Gene regulatory networks; Mathematical modeling; Qualitative modeling; Discrete models; Piecewise affine differential equation; models
Mathematical modeling often helps to provide a systems perspective on gene regulatory networks. In particular, qualitative approaches are useful when detailed kinetic information is lacking. Multiple methods have been developed that implement qualitative information in different ways, e.g., in purely discrete or hybrid discrete/continuous models. In this paper, we compare the discrete asynchronous logical modeling formalism for gene regulatory networks due to R. Thomas with piecewise affine differential equation models. We provide a local characterization of the qualitative dynamics of a piecewise affine differential equation model using the discrete dynamics of a corresponding Thomas model. Based on this result, we investigate the consistency of higher-level dynamical properties such as attractor characteristics and reachability. We show that although the two approaches are based on equivalent information, the resulting qualitative dynamics are different. In particular, the dynamics of the piecewise affine differential equation model is not a simple refinement of the dynamics of the Thomas model (C) 2013 Elsevier Ireland Ltd. All rights reserved.
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