Faculty Publications
Modeling Dioxygenase Enzyme Kinetics in Familial Paraganglioma
Document Type
Article
Keywords
HIF, Hypoxia, Mathematical model, Paraganglioma, PHD
Journal/Book/Conference Title
Biology Open
Volume
4
Issue
10
First Page
1281
Last Page
1289
Abstract
Hypoxia inducible factors (HIFs) play vital roles in cellular maintenance of oxygen homeostasis. These transcription factors are responsible for the expression of genes involved in angiogenesis, metabolism, and cell proliferation. Here, we generate a detailed mathematical model for the enzyme kinetics of α-ketoglutaratedependent HIF prolyl 4-hydroxylase domain (PHD) dioxygenases to simulate our in vitro data showing synergistic PHD inhibition by succinate and hypoxia in experimental models of succinate dehydrogenase loss, which phenocopy familial paraganglioma. Our mathematical model confirms the inhibitory synergy of succinate and hypoxia under physiologically-relevant conditions. In agreement with our experimental data, the model predicts that HIF1α is not stabilized under atmospheric oxygen concentrations, as observed. Further, the model confirms that addition of α-ketoglutarate can reverse PHD inhibition by succinate and hypoxia in SDH-deficient cells.
Department
Department of Chemistry and Biochemistry
Original Publication Date
1-1-2015
DOI of published version
10.1242/bio.013623
Recommended Citation
Peters, Justin P.; Her, Yeng F.; and Maher, L. James, "Modeling Dioxygenase Enzyme Kinetics in Familial Paraganglioma" (2015). Faculty Publications. 6229.
https://scholarworks.uni.edu/facpub/6229