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Computational Modeling of Glucose Uptake in the Enterocyte
Nima Afshar1, Soroush Safaei1, David P Nickerson1
1Auckland Bioengineering Institute, University of Auckland, Auckland, New Zealand.
Frontiers in Physiology
|April 30, 2019
Summary
A new mathematical model of intestinal glucose absorption reveals that the sodium-glucose cotransporter (SGLT1) is key at low glucose levels, while glucose transporter type 2 (GLUT2) is more important at high concentrations.
Area of Science:
- Physiology
- Computational Biology
- Biophysics
Background:
- Intestinal glucose absorption is vital for human nutrition and metabolic regulation.
- Mathematical models are crucial for understanding glucose transport mechanisms and pathways.
Purpose of the Study:
- To develop a validated, predictive mathematical model of glucose transport in intestinal epithelial cells.
- To elucidate the roles of SGLT1 and GLUT2 in glucose absorption using the developed model.
Main Methods:
- Developed a CellML-based mathematical model incorporating all relevant intestinal glucose transporters.
- Validated the model against existing experimental and simulation data.
- Used the model to simulate and analyze glucose absorption under varying conditions.
Main Results:
- The model accurately predicts glucose absorption based on literature data.
- SGLT1's contribution to glucose absorption is dominant at low glucose concentrations (<20 mM) and short times (<60 s).
- GLUT2's contribution becomes more significant at high glucose concentrations and longer exposure durations.
Conclusions:
- The developed CellML model provides a mechanistic and modular framework for studying intestinal glucose transport.
- The model quantitatively distinguishes the roles of SGLT1 and GLUT2 in glucose absorption.
- This computational tool facilitates further research, model extension, and parameter sensitivity analysis.
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