Constraint-Based Modeling of Metabolic Interactions in and Between Astrocytes and Neurons

  • Çakır T
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Abstract

Through its metabolic network, a cell distributes the available carbon flux into several pathways. The pathway activity information for a cell is crucial to deduce underlying molecular mechanisms and to monitor the effect of perturbations such as diseases. The constraint-based modeling approach to organism- and tissue-specific metabolic networks has therefore become a popular focus in the computational system’s biology field. The approach uses reaction stoichiometries and the reversibility information for the reactions as well as few literature-based flux measurements to calculate flux distributions through all covered pathways in a metabolic network. Therefore, the effect of phenomena such as hypoxia, hyperglycemia, and neurodegenerative diseases on brain metabolism can be computationally documented to enlighten molecular mechanisms and to design new hypotheses. This chapter covers the basics of constraint-based modeling via a toy metabolic network example and gives an overview of the application of the approach to couple neuronal and astrocytic metabolisms. It further utilizes a recently developed genome-scale metabolic network of the brain to calculate fluxes for the resting state and for hypoxia in and between astrocytes and neurons. Finally, the chapter shortly discusses the use of transcriptome data to obtain condition-specific flux distributions.

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Çakır, T. (2019). Constraint-Based Modeling of Metabolic Interactions in and Between Astrocytes and Neurons (pp. 393–420). https://doi.org/10.1007/978-3-030-00817-8_15

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