Rat ventricular myocyte model modified to simulate conditions in type-I diabetes
Model Status
This cell model was developed by Liren Li and represents the electrophysiological alterations in rat ventricular myocytes in type-I diabetes. It reads both in PCenv and COR and is able to produce action potentials under multiple stimuli.
Model Structure
This model is a mathematical representation of the diabetic phenotype by incorporating changes in the ionic mechanisms that are suggested by experimental data to underlie the altered electrophysiological characteristics in the short-term, type-I model of STZ-induced diabetes. It is based on the Pandit_2001 rat left ventricular epicardial model. The model is able to qualitatively simulate the prolongation of the APD in accordance with experimental results. It provides novel insights into the ionic basis for this changes in the action potential profile during diabetic conditions, and illustrates the complex, nonlinear relationship betweeh the APD and both intracellular Ca2+ homeostasis, and E-C coupling.
A mathematical model of the adult rat right ventricular (RV) cell was first derived from the Pandit 2001 rat LV epicardial cell model, and used as the control model. Further modifications from the control model were made to represent the short-term, type-I diabetic myocyte.
The original paper references are cited below:
A Mathematical Model of Action Potential Heterogeneity in Adult Rat Left Ventricular Myocytes, Sandeep V. Pandit, Robert B. Clark, Wayne R. Giles and Semahat S. Demir, 2001, Biophysical Journal, 81, 3029-3051. PubMed ID: 11720973
A Mathematical Model of the Electrophysiological Alterations in Rat Ventricular Myocytes in Type-I Diabetes, Sandeep V. Pandit, Wayne R. Giles and Semahat S. Demir, 2003 Biophysical Journal, 84, 832 - 841. PubMed ID: 12547767
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| A fluid compartment model of the rat epicardial/endocardial ventricular cell. |