Glucose absorption in gastrointestinal tract

Glucose absorption in the gastrointestinal tract is a physiological process rather than a single molecular target. It refers to how dietary carbohydrates are digested into monosaccharides—primarily glucose—which are then absorbed across enterocytes lining the small intestine. The primary mechanism involves active transport via sodium–glucose cotransporter 1 (SGLT1) on the apical membrane and facilitated diffusion via GLUT2 on the basolateral membrane[2][3]. Under high luminal concentrations, GLUT2 can also translocate to the apical surface for additional uptake[2][3]. Brush cells expressing sweet taste receptors may modulate rapid insertion of GLUT2 into enterocyte membranes in response to luminal sugars[2].\n\nThis process is essential for energy homeostasis and regulation of postprandial blood sugar levels. Dysregulation contributes significantly to diseases such as diabetes mellitus and obesity. While not itself a druggable target, its key mediators—such as SGLT1—are considered therapeutic targets.\n\nNote: "Glucose absorption in gastrointestinal tract" describes a complex physiological event involving multiple proteins/transporters; it is not itself a canonical molecule or receptor but rather an aggregate function/process involving several well-defined targets like SGLT1 and GLUT transporters[3][2].

Other names

Intestinal glucose absorptionSmall intestine glucose uptakeGut glucose absorption

Drugs that affect this process act by one or more of the following mechanisms:\n- Inhibition of carbohydrate-digesting enzymes to reduce monosaccharide formation and thus limit absorbable glucose (e.g., acarbose)[3].\n- Inhibition or modulation of sodium–glucose cotransporter 1 (SGLT1) activity at the apical membrane[3][2].