Lipid membrane

Lipid membranes are fundamental biological structures composed of a phospholipid bilayer that defines the boundaries of cells and organelles. They serve as selective barriers, regulating the transport of ions and molecules while providing a scaffold for membrane proteins involved in signaling and energy metabolism [Alberts B, et al. Molecular Biology of the Cell]. In pharmacology, lipid membranes are recognized as therapeutic targets for several classes of drugs, particularly antimicrobials and antifungals that exploit differences in lipid composition between pathogens and humans [PubMed: PMID 24057236]. For instance, polyene antifungals like Amphotericin B target ergosterol to create lethal pores, while lipopeptides like Daptomycin disrupt bacterial membrane potential [StatPearls: Amphotericin B; PubMed: PMID 29143552]. Additionally, the physical state of the membrane, such as its fluidity and the organization of lipid rafts, can influence the activity of various receptors and transporters, making it a factor in diseases like cancer and neurodegeneration [PubMed: PMID 27107029]. However, the lack of high specificity for pathogen-specific lipids often leads to significant safety concerns, including nephrotoxicity and hemolysis in patients.

Other names

Biological membraneCell membranePlasma membranePhospholipid bilayerCytoplasmic membraneOrganelle membrane

Pore formation, membrane depolarization, sequestration of essential lipids (e.g., ergosterol), alteration of membrane fluidity, and disruption of lipid raft organization [StatPearls: Amphotericin B; PubMed: PMID 27107029; PubMed: PMID 29143552].