Cholesterol-rich membrane

Cholesterol-rich membranes refer to regions of the cellular membrane with a high concentration of cholesterol, forming microdomains such as lipid rafts. Cholesterol constitutes up to 40% of plasma membrane lipids in eukaryotic cells and is essential for regulating membrane thickness, rigidity, elasticity, permeability, and protein organization[1][2][4][5]. These specialized domains provide a platform for the assembly and function of signaling complexes, modulation of membrane protein activity, and selective molecular transport[6]. Cholesterol-rich domains are implicated in normal physiological processes, such as cell signaling and membrane trafficking, as well as in the pathogenesis of several diseases, including cardiovascular disease, neurodegeneration, and infection. These membranes are not themselves receptor targets but are critical for the function of embedded proteins and are manipulated pharmacologically most often through drugs that alter cholesterol homeostasis rather than drugs that target the membrane domain directly[4][5][6]. In summary, “cholesterol-rich membrane” refers to a structural and functional property of cell membranes, not a therapeutic molecular target like a receptor or enzyme, and is not recognized as a canonical drug target[2][4][5][6].

Other names

Cholesterol-enriched membraneCholesterol-rich domainLipid raft (context-dependent)

Disruption or depletion of cholesterol changes membrane microdomain organization and protein localization[4][5] Modulation of cell signaling pathways and membrane protein activity[3][6]