Cellular biomembrane

Cellular biomembranes are complex, dynamic lipid bilayers that serve as the primary structural boundary for cells and their internal organelles (StatPearls, Physiology, Cell Membrane). Composed of a diverse array of phospholipids, sphingolipids, sterols, and embedded proteins, these membranes are essential for maintaining cellular homeostasis through selective permeability and compartmentalization (Alberts B, et al., Molecular Biology of the Cell). They play a pivotal role in biological functions such as signal transduction, ion transport, and cell-to-cell communication. In a therapeutic context, biomembranes are targeted by specific classes of drugs, most notably antimicrobial agents like polymyxins and daptomycin, which disrupt membrane integrity to cause rapid cell death in pathogens (Mingeot-Leclercq MP, et al., Clinical Microbiology and Infection). Furthermore, alterations in membrane composition and fluidity are associated with various pathologies, including cancer and neurodegenerative disorders, highlighting the membrane's importance as both a direct and indirect pharmacological target (Escribá PV, et al., Trends in Molecular Medicine). The physicochemical properties of the membrane also dictate the pharmacokinetics of many drugs, as passive diffusion across the lipid bilayer is a primary route for intracellular drug delivery.

Other names

Biological membranePlasma membraneLipid bilayerCytoplasmic membraneCell membraneBiomembrane

Drugs targeting cellular biomembranes typically act through physical disruption of the lipid bilayer, such as pore formation (e.g., polyenes), detergent-like solubilization (e.g., polymyxins), or alteration of membrane curvature and fluidity (e.g., general anesthetics). These actions lead to the leakage of essential ions and metabolites, loss of membrane potential, and ultimately cell death or functional inhibition (Mingeot-Leclercq MP, et al., Clinical Microbiology and Infection, 2018).