Cellular and endosomal phospholipid membranes

Cellular and endosomal phospholipid membranes are fundamental structural components that define the boundaries of the cell and its internal organelles, consisting of a dynamic lipid bilayer that regulates compartmentalization and molecular transport (Alberts B, et al. Molecular Biology of the Cell, 2014). These membranes play a vital role in biological processes such as endocytosis, exocytosis, and signal transduction by providing a platform for membrane-bound proteins and receptors. In disease states, these membranes are often exploited by pathogens; for example, many viruses, including SARS-CoV-2 and Influenza, utilize the endosomal pathway to enter host cells through membrane fusion or penetration (Cano M, et al. Int J Mol Sci, 2021). Pharmacologically, these membranes are targeted by drugs that either disrupt their integrity, such as the antifungal amphotericin B which forms pores, or modify their internal environment, such as chloroquine which raises endosomal pH to prevent viral replication (Savarino A, et al. Lancet Infect Dis, 2003). Because phospholipid membranes are universal to all host cells, therapeutic strategies targeting them must carefully balance efficacy against the risk of non-specific systemic toxicity and a narrow therapeutic index (Baginski M, et al. Curr Drug Targets, 2005).

Other names

Phospholipid bilayerPlasma membraneEndosomal membraneBiological membranesCytoplasmic membrane

Drugs targeting these membranes act through several mechanisms: altering the physicochemical environment (e.g., increasing endosomal pH to inhibit viral fusion), direct membrane disruption via pore formation, or binding to specific lipid components to induce cell lysis.