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Slug: 10.5072/FK2.stagefigshare.c.2814593
DOI: 10.5072/FK2.stagefigshare.c.2814593
Title: The cardiac Na+/K+ ATPase: An updated, thermodynamically consistent model.
Date: 2020-05-21
SubmissionDate: 2017-04-15
PublishDate: 2020-05-06
LastPublishDate: 2020-05-06
Kind: original
PubAuthors: Pan, M.
Blanco, P. J.
Müller, L. O.
Hunter, P. J.
Safaei, S.
PubAuthorsORCID: 0000-0001-6492-2619
0000-0003-3527-619X
0000-0003-1933-8995
0000-0001-9665-4145
0000-0001-5734-243X
PrimaryPaperName: Bond Graph Model of Cerebral Circulation: Toward Clinically Feasible Systemic Blood Flow Simulations. 2018, S. Safaei, P.J. Blanco, L.O. Müller, L.R. Hellevik, P.J. Hunter
PrimaryPaperURL: https://doi.org/10.1152/ajpheart.00771.2007
FulltextURL: https://physiome.figsh.com/collections/Pan_et_al_2020_The_cardiac_Na_K_ATPase_An_updated_thermodynamically_consistent_model/2814593
ArchiveURL: https://physiome.figsh.com/collections/Pan_et_al_2020_The_cardiac_Na_K_ATPase_An_updated_thermodynamically_consistent_model/2814593
Abstract: The Na+/K+ ATPase is an essential component of cardiac electrophysiology, maintaining physiological Na+ and K+ concentrations over successive heart beats. Terkildsen et al. (2007) developed a model of the ventricular myocyte Na+/K+ ATPase to study extracellular potassium accumulation during ischaemia, demonstrating the ability to recapitulate a wide range of experimental data, but unfortunately there was no archived code associated with the original manuscript. Here we detail an updated version of the model and provide CellML and MATLAB code to ensure reproducibility and reusability. We note some errors within the original formulation which have been corrected to ensure that the model is thermodynamically consistent, and although this required some reparameterisation, the resulting model still provides a good fit to experimental measurements that demonstrate the dependence of Na+/K+ ATPase pumping rate upon membrane voltage and metabolite concentrations. To demonstrate thermodynamic consistency we also developed a bond graph version of the model. We hope that these models will be useful for community efforts to assemble a whole-cell cardiomyocyte model which facilitates the investigation of cellular energetics.

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