Cholesterol trafficking pathway

Cholesterol trafficking pathways refer to the coordinated cellular processes that regulate the movement of cholesterol within cells, including its uptake from extracellular sources (e.g., LDL via the LDL receptor), its transit through endosomes and lysosomes (mediated by proteins such as NPC1 and NPC2), and its redistribution to membranes including the plasma membrane, endoplasmic reticulum, and mitochondria. These processes involve various molecular players, such as lipid transporters (ABCA1, ABCG1), vesicular machinery, sterol transfer proteins, and scaffold proteins like caveolin-1. Dysregulation of cholesterol trafficking is implicated in diseases such as Niemann-Pick type C, atherosclerosis, and cancer, where altered cholesterol distribution impacts membrane composition, cell signaling, and angiogenesis. While the pathway itself is not a direct drug target, its constituent proteins and transporters can be targeted pharmacologically, as exemplified by drugs such as itraconazole and other cholesterol trafficking inhibitors[4][2][5][3][1].

Other names

Intracellular cholesterol traffickingcholesterol transport pathwaycholesterol transfer pathway

Inhibition of cholesterol transport from lysosome/endosome to plasma membrane leads to blockade of mTOR signaling in endothelial cells; Disruption of lipid raft structure alters receptor signaling for angiogenesis