| Reducing experimental variability in variance-based sensitivity analysis of biochemical reaction systems. | |
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MedLine Citation:
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PMID: 21428605 Owner: NLM Status: In-Data-Review |
Abstract/OtherAbstract:
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Sensitivity analysis is a valuable task for assessing the effects of biological variability on cellular behavior. Available techniques require knowledge of nominal parameter values, which cannot be determined accurately due to experimental uncertainty typical to problems of systems biology. As a consequence, the practical use of existing sensitivity analysis techniques may be seriously hampered by the effects of unpredictable experimental variability. To address this problem, we propose here a probabilistic approach to sensitivity analysis of biochemical reaction systems that explicitly models experimental variability and effectively reduces the impact of this type of uncertainty on the results. The proposed approach employs a recently introduced variance-based method to sensitivity analysis of biochemical reaction systems [Zhang et al., J. Chem. Phys. 134, 094101 (2009)] and leads to a technique that can be effectively used to accommodate appreciable levels of experimental variability. We discuss three numerical techniques for evaluating the sensitivity indices associated with the new method, which include Monte Carlo estimation, derivative approximation, and dimensionality reduction based on orthonormal Hermite approximation. By employing a computational model of the epidermal growth factor receptor signaling pathway, we demonstrate that the proposed technique can greatly reduce the effect of experimental variability on variance-based sensitivity analysis results. We expect that, in cases of appreciable experimental variability, the new method can lead to substantial improvements over existing sensitivity analysis techniques. |
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Authors:
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Hong-Xuan Zhang; John Goutsias |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: The Journal of chemical physics Volume: 134 ISSN: 1089-7690 ISO Abbreviation: J Chem Phys Publication Date: 2011 Mar |
Date Detail:
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Created Date: 2011-03-24 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 0375360 Medline TA: J Chem Phys Country: United States |
Other Details:
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Languages: eng Pagination: 114105 Citation Subset: IM |
Affiliation:
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Procter & Gamble Co., Miami Valley Innovation Center, Cincinnati, Ohio 45253, USAWhitaker Biomedical Engineering Institute, The Johns Hopkins University, Baltimore, Maryland 21218, USA. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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