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• W2127117631 startingPage "e1003498" @default.
• W2127117631 abstract "Discovery in developmental biology is often driven by intuition that relies on the integration of multiple types of data such as fluorescent images, phenotypes, and the outcomes of biochemical assays. Mathematical modeling helps elucidate the biological mechanisms at play as the networks become increasingly large and complex. However, the available data is frequently under-utilized due to incompatibility with quantitative model tuning techniques. This is the case for stem cell regulation mechanisms explored in the Drosophila germarium through fluorescent immunohistochemistry. To enable better integration of biological data with modeling in this and similar situations, we have developed a general parameter estimation process to quantitatively optimize models with qualitative data. The process employs a modified version of the Optimal Scaling method from social and behavioral sciences, and multi-objective optimization to evaluate the trade-off between fitting different datasets (e.g. wild type vs. mutant). Using only published imaging data in the germarium, we first evaluated support for a published intracellular regulatory network by considering alternative connections of the same regulatory players. Simply screening networks against wild type data identified hundreds of feasible alternatives. Of these, five parsimonious variants were found and compared by multi-objective analysis including mutant data and dynamic constraints. With these data, the current model is supported over the alternatives, but support for a biochemically observed feedback element is weak (i.e. these data do not measure the feedback effect well). When also comparing new hypothetical models, the available data do not discriminate. To begin addressing the limitations in data, we performed a model-based experiment design and provide recommendations for experiments to refine model parameters and discriminate increasingly complex hypotheses." @default.
• W2127117631 created "2016-06-24" @default.
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• W2127117631 date "2014-03-13" @default.
• W2127117631 modified "2023-10-15" @default.
• W2127117631 title "Model-Based Analysis for Qualitative Data: An Application in Drosophila Germline Stem Cell Regulation" @default.
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• W2127117631 doi "https://doi.org/10.1371/journal.pcbi.1003498" @default.
• W2127117631 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/3952817" @default.
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