Cellular membranes and lipid interfaces

Cellular membranes and lipid interfaces are fundamental structural and functional components of all living cells, primarily composed of a phospholipid bilayer interspersed with proteins, sterols, and carbohydrates (NIH, 2018; Chemical Society Reviews, 2009). These interfaces serve as the primary barrier between the intracellular and extracellular environments, facilitating essential processes such as signal transduction, ion homeostasis, and molecular transport (NIH, 2008; MDPI, 2022). In pharmacology, the lipid interface is a critical target for several classes of drugs, most notably antimicrobial and antifungal agents like polymyxins and polyenes (ACS, 2020; UCL, 2024). These drugs exploit differences in lipid composition between host and pathogen membranes to induce pore formation or membrane disruption, leading to cell death (ResearchGate, 2019; ACS, 2020). Beyond infectious diseases, the physical properties of the membrane—such as fluidity, curvature, and the presence of specialized microdomains like lipid rafts—are increasingly recognized as targets in cancer and neurodegeneration (NIH, 2016; ResearchGate, 2014). Altered lipid metabolism in these diseases affects protein-lipid interactions and cellular signaling, making the membrane a viable site for therapeutic intervention (MDPI, 2022; NIH, 2016). However, the therapeutic window for membrane-targeting drugs is often narrow due to the potential for off-target effects on host cell membranes (NIH, 2010; ACS, 2020). This lack of selectivity can lead to significant safety concerns, including nephrotoxicity, neurotoxicity, and hemolysis (ResearchGate, 2019; ACS, 2020). Despite these challenges, the membrane remains a robust target because it is difficult for pathogens to develop resistance against physical disruption of their structural integrity (NIH, 2010; ResearchGate, 2019).

Other names

Lipid bilayerBiological membranePlasma membraneCell membraneLipid-water interfaceBiomembrane

Direct interaction with membrane lipids leading to pore formation, membrane thinning, altered fluidity, or disruption of the lipid bilayer integrity, ultimately causing cell lysis or loss of electrochemical gradients (ACS, 2020; ResearchGate, 2014).