Gastrointestinal absorption of glucose and cholesterol

The term "gastrointestinal absorption of glucose and cholesterol" refers collectively to the complex set of cellular processes by which dietary sugars and sterols are taken up from the intestinal lumen into enterocytes, then transported into circulation. Glucose is primarily absorbed via sodium-dependent co-transporter SGLT1 at the apical membrane followed by facilitated diffusion through GLUT2 at the basolateral membrane into portal blood. Cholesterol is absorbed mainly via Niemann-Pick C-like protein 1 (NPC1L1) at the brush border membrane; other proteins like SR-BI and CD36 also contribute. These pathways are regulated by dietary composition, hormonal signals, intracellular signaling cascades including protein kinase C activation, transcription factors such as LXR-alpha/beta and PPARs, among others[3][7]. Alterations in these absorptive mechanisms play key roles in metabolic diseases including diabetes mellitus type 2—where high luminal glucose enhances both its own uptake and that of cholesterol—and cardiovascular disease due to increased postprandial lipemia associated with excessive lipid/cholesterol intake/absorption[3][7]. Several drugs act on these pathways either directly inhibiting specific transporters or indirectly modulating their activity/expression. Because this entry does not correspond to a unique molecular entity but rather an aggregate function involving multiple well-defined targets—each with their own canonical names—it should be considered non-canonical for structured drug-target databases.

Other names

Intestinal glucose absorptionIntestinal cholesterol absorptionGlucose uptake (intestinal)Cholesterol uptake (intestinal)

For drugs targeting these pathways: SGLT inhibitors block sodium-glucose cotransport in the intestine/kidney. Ezetimibe inhibits NPC1L1-mediated intestinal cholesterol uptake. Polyphenols may inhibit facilitated diffusion or active transport mechanisms for both nutrients indirectly by modulating transporter expression/activity[5].