Cholesterol-containing cell membrane

Cholesterol-containing cell membranes are fundamental structural components of eukaryotic cells, providing a semi-permeable barrier and regulating membrane fluidity [1]. Beyond structural roles, cholesterol organizes into specialized microdomains known as lipid rafts, which serve as platforms for signal transduction, protein trafficking, and pathogen entry [2]. These membranes are significant therapeutic targets, particularly for polyene antifungal agents like Amphotericin B, which bind to sterols to create lethal pores [3]. While these drugs primarily target fungal ergosterol, their residual affinity for host cholesterol leads to significant clinical toxicities, such as nephrotoxicity and hemolysis [1, 3]. Additionally, modulating membrane cholesterol is an emerging strategy in treating cancer and viral infections, where lipid raft integrity is crucial for disease progression [2, 4]. Understanding the biophysical properties of these membranes is essential for developing more selective agents that minimize off-target effects on human tissues [4]. Research into cholesterol-depleting agents like cyclodextrins further highlights the membrane's role as a modifiable target in various pathological states [2]. [1] StatPearls: Amphotericin B (https://www.ncbi.nlm.nih.gov/books/NBK532283/); [2] Frontiers in Cell and Developmental Biology: Lipid Rafts as a Therapeutic Target (https://www.frontiersin.org/articles/10.3389/fcell.2020.00392/full); [3] Journal of Biological Chemistry: Mechanism of Polyene Antibiotics (https://www.jbc.org/article/S0021-9258(20)38456-1/fulltext); [4] Nature Reviews Molecular Cell Biology: Cholesterol and Membrane Organization (https://www.nature.com/articles/nrm.2017.107).

Other names

Cholesterol-rich membraneLipid bilayerPlasma membrane cholesterolCholesterol-rich lipid rafts

Direct binding to membrane cholesterol leading to the formation of trans-membrane pores, ion leakage, and the disruption of lipid raft-mediated signaling complexes.