Cellular and viral lipid membranes

Cellular and viral lipid membranes are complex, dynamic assemblies of phospholipids, cholesterol, and proteins that define the boundaries of cells and many viruses. These membranes are essential for maintaining physiological gradients, facilitating signal transduction, and protecting the internal environment from external stressors (Nature, 2021). In virology, the viral envelope is a lipid bilayer acquired from the host cell that is crucial for viral entry, assembly, and budding (Wikipedia, 2024). Because these membranes are vital for the survival of pathogens, they serve as important therapeutic targets for antifungal, antibacterial, and antiviral agents. For instance, polyene antifungals target fungal-specific ergosterol to induce membrane leakage, while polymyxins disrupt the outer membrane of Gram-negative bacteria (NIH, 2023). However, the fundamental similarity between pathogen and host membranes often leads to narrow therapeutic windows and significant safety concerns, such as nephrotoxicity and hemolysis (PubMed, 2022). Understanding the unique lipid signatures of different membranes remains a key area of research for developing more selective and less toxic membrane-active drugs.

Other names

Biological membranesLipid bilayersPlasma membranesViral envelopesCytoplasmic membranes

Drugs targeting lipid membranes typically act by disrupting the structural integrity of the bilayer, often through pore formation, sequestration of essential lipids like ergosterol or cholesterol, or by inhibiting the fusion process between viral envelopes and host cell membranes (NIH, 2023; StatPearls, 2023).