Cellular membranes and nearby biomolecules

Cellular membranes are fundamental biological structures composed of a phospholipid bilayer embedded with proteins, carbohydrates, and cholesterol. They serve as the primary barrier between the intracellular and extracellular environments, regulating the transport of ions and molecules while facilitating signal transduction and cell-to-cell communication (Alberts et al., Molecular Biology of the Cell, 2002). While not a single molecular target like a specific enzyme or receptor, cellular membranes and their associated biomolecules are critical sites of action for various therapeutic interventions, including membrane-disrupting antibiotics like daptomycin and photodynamic therapy agents that induce localized oxidative damage (Strauss, 1995; Yeaman & Yount, 2003). In disease states, alterations in membrane composition or fluidity can contribute to cancer progression, neurodegeneration, and cardiovascular dysfunction. However, targeting the membrane directly presents significant challenges in drug design, primarily due to the risk of non-specific toxicity and the difficulty of achieving selective damage to pathological cells over healthy ones (Hancock & Sahl, 2006).

Other names

Cell membranePlasma membraneLipid bilayerCytoplasmic membrane

Drugs targeting these structures typically act through physical disruption, such as pore formation, alteration of membrane fluidity, or the generation of reactive oxygen species (ROS) that cause lipid peroxidation and subsequent loss of membrane integrity.