Pathogen membrane phospholipid

Pathogen membrane phospholipids are essential structural components of the lipid bilayers of bacteria, fungi, and enveloped viruses (Zhang & Rock, 2008, Nature Reviews Microbiology). These molecules maintain cellular integrity, regulate the transport of solutes, and provide a platform for membrane-bound proteins involved in signaling and metabolism. In bacteria, phospholipids such as phosphatidylglycerol and cardiolipin are often negatively charged, providing a selective target for cationic antimicrobial agents like polymyxins and daptomycin, which distinguish them from the zwitterionic phospholipids predominant in mammalian cell membranes (Epand et al., 2016, Biochimica et Biophysica Acta). For enveloped viruses, the lipid bilayer is crucial for protecting the viral genome and facilitating fusion with host cell membranes during entry (Lorizate & Kräusslich, 2011, Cold Spring Harbor Perspectives in Biology). Targeting these phospholipids allows for broad-spectrum antimicrobial activity by physically disrupting the membrane or inducing rapid depolarization, leading to cell death or neutralization of viral infectivity (Hurdle et al., 2011, Nature Reviews Microbiology). This approach is particularly valuable for addressing multi-drug resistant pathogens that have developed resistance to traditional protein-targeting antibiotics.

Other names

Microbial membrane phospholipidBacterial phospholipidViral envelope lipidFungal membrane phospholipidPathogen cell membrane phospholipid

Drugs targeting pathogen phospholipids typically act through physical disruption of the lipid bilayer. Cationic peptides and lipopeptides bind to anionic phospholipids, leading to pore formation, membrane thinning, or detergent-like solubilization (Brogden, 2005, Nature Reviews Microbiology). Daptomycin specifically aggregates in the presence of calcium to insert into the bacterial membrane, causing rapid potassium efflux and depolarization (Silverman et al., 2003, Antimicrobial Agents and Chemotherapy). In viral contexts, agents may interfere with the lipid-mediated fusion process or target specific lipids like phosphatidylserine exposed on the viral envelope (Siaw et al., 2019, Journal of Virology).