General cell membrane components

The cell membrane is a fundamental biological structure composed of a phospholipid bilayer interspersed with cholesterol, glycolipids, and various integral and peripheral proteins (StatPearls: https://www.ncbi.nlm.nih.gov/books/NBK554421/). Its primary biological function is to act as a selective barrier, regulating the movement of ions and molecules while facilitating essential processes such as signal transduction and cell-to-cell communication (Molecular Biology of the Cell: https://www.ncbi.nlm.nih.gov/books/NBK26871/). In the context of pharmacology, general cell membrane components serve as targets for several classes of drugs, most notably antifungal and antibacterial agents that disrupt membrane stability or permeability (Frontiers in Pharmacology: https://www.frontiersin.org/articles/10.3389/fphar.2017.00138/full). For instance, polyene antifungals bind to ergosterol in fungal membranes to create pores, while polymyxins interact with lipopolysaccharides in Gram-negative bacteria to destabilize the outer membrane (Clinical Microbiology Reviews: https://journals.asm.org/doi/10.1128/cmr.00064-18). Daptomycin represents another example, inserting into the bacterial cytoplasmic membrane in a calcium-dependent manner to cause rapid depolarization (Journal of Biological Chemistry: https://www.jbc.org/article/S0021-9258(20)38345-9/fulltext). Despite their efficacy, drugs targeting general membrane components often face therapeutic challenges related to systemic toxicity and a narrow therapeutic index, as host cell membranes may also be susceptible to disruption. This lack of high specificity often limits the clinical use of these agents to topical applications or last-resort systemic treatments for multi-drug resistant infections.

Other names

Plasma membraneLipid bilayerCytoplasmic membraneCell membrane

Disruption of membrane integrity, formation of transmembrane pores, sequestration of essential membrane lipids, and depolarization of the membrane potential.