General cellular membrane phospholipids

General cellular membrane phospholipids are the fundamental structural components of all biological membranes, organized into a lipid bilayer that serves as a selective barrier for cells and organelles [1]. These amphipathic molecules, primarily glycerophospholipids like phosphatidylcholine and phosphatidylethanolamine, play crucial roles in maintaining membrane fluidity, facilitating the function of integral membrane proteins, and serving as precursors for signaling molecules [2]. In a therapeutic context, membrane phospholipids are targeted by several classes of antimicrobial agents that exploit differences in lipid composition between pathogen and host membranes. For instance, polymyxins and daptomycin selectively bind to anionic phospholipids in bacterial membranes, leading to rapid depolarization and cell death [3, 4]. Beyond infectious diseases, phospholipids are involved in the pathogenesis of autoimmune conditions like antiphospholipid syndrome and are implicated in the altered metabolism of cancer cells [5]. However, targeting these lipids presents significant challenges, as non-specific interactions can lead to systemic toxicities, such as drug-induced phospholipidosis or nephrotoxicity [6].

Other names

Membrane phospholipidsPhosphoglyceridesCellular lipidsGlycerophospholipidsLipid bilayer components

Drugs targeting membrane phospholipids typically act by disrupting the physical integrity of the lipid bilayer, inducing membrane curvature, forming transmembrane pores, or sequestering essential lipid intermediates like Lipid II. For example, lipopeptides like daptomycin insert into the membrane in a calcium-dependent manner to cause depolarization, while polymyxins act as detergents by binding to anionic lipids in the bacterial outer membrane.