Cellular membranes and surface lipid interfaces

Cellular membranes and surface lipid interfaces are the fundamental structural components that define the boundaries of all living cells and their internal organelles. Composed primarily of a phospholipid bilayer, these interfaces regulate the passage of molecules and provide a platform for essential signaling and transport proteins (Frontiers in Pharmacology, 2021). In a therapeutic context, the lipid bilayer itself serves as a target for various classes of drugs, particularly antimicrobials and antifungals. These agents, such as polyenes and lipopeptides, often work by physically disrupting the membrane's integrity through pore formation or detergent-like effects (Nature Reviews Microbiology, 2017). For example, amphotericin B targets fungal ergosterol to create lethal ion-leaking pores, while polymyxins interact with the outer membrane of Gram-negative bacteria (StatPearls, 2023). However, the primary challenge in targeting cellular membranes is achieving selectivity, as damage to host cell membranes can lead to severe toxicities like hemolysis and nephrotoxicity (NIH, 2022). Despite these risks, membrane-active agents remain critical treatments for multi-drug resistant infections.

Other names

Lipid bilayerPlasma membraneBiological membranesCell membraneCytoplasmic membrane

Drugs targeting cellular membranes typically act through physical disruption of the lipid bilayer, including pore formation, detergent-like solubilization, or alteration of membrane fluidity and curvature (Nature Reviews Microbiology, 2017). These actions lead to the loss of transmembrane gradients, leakage of intracellular contents, and eventual cell lysis (StatPearls, 2023).