Plant sterol-mediated inhibition of intestinal cholesterol uptake

Plant sterol-mediated inhibition of intestinal cholesterol uptake refers to the process by which plant sterols (phytosterols and stanols) reduce the intestinal absorption of dietary cholesterol. Plant sterols structurally resemble cholesterol and compete with it for incorporation into micelles in the gut, reducing cholesterol solubilization and uptake. Additional mechanisms include interference with cholesterol transporters (such as NPC1L1), preventing cholesterol esterification and chylomicron formation, and stimulating the efflux of cholesterol from enterocytes into the intestinal lumen (TICE pathway). This results in lower serum LDL cholesterol and a potential reduction of cardiovascular disease risk. This is not a single drug target but a pathway modulated by dietary components[1][2][3][4].

Other names

Plant sterol-mediated cholesterol absorption inhibitionPhytosterol-mediated cholesterol uptake inhibition

Compete with dietary cholesterol for incorporation into mixed micelles in the intestine, reducing cholesterol’s solubilization and absorption[1][2][3][4]\nInterfere with the transport-mediated uptake of cholesterol via NPC1L1 and possibly other sterol transporters[1]\nInduce transintestinal cholesterol efflux (TICE), increasing cholesterol excretion into feces[1][2]\nDownregulate enzymes and proteins involved in cholesterol esterification and chylomicron incorporation (e.g., ACAT2, MTP)[1]