A computer model simulating human glucose absorption and metabolism in health and metabolic disease states
The roles of apical SGLT1 and GLUT2 intestinal glucose absorption The sodium dependent glucose transporter SGLT1 is the only active component of intestinal transport sugar absorption. When SGLT1 is deficient, as in glucose-galactose malabsorption syndrome 1 – 3 , or inactivated by specific inhibitors, such as phloridzin, or similarly acting high efficacy inhibitors e.g. GSK1614235 4 , small intestinal sugar absorption is blocked and the ingested sugar load is relegated to the large intestine where it becomes subject to fermentation processes. It has been argued that exposure to high intestinal luminal glucose concentrations ≥ 15mM, or more modest glucose loads, supplemented with artificial sweeteners, induces small intestinal apical membrane passive glucose transport via GLUT2 5 , 6 . This process is stimulated by enterocyte AMP kinase(AMPK), triggered by opening of Cav 1.3 Ca 2+ channels following SGLT1-dependent depolarization of the apical membrane potential 7 . However...