Microbial lipid membranes and epithelial cell membranes

Microbial lipid membranes and epithelial cell membranes represent the primary physical barriers between organisms and their environment, as well as the critical interface for drug action in infectious diseases. Microbial membranes, such as the lipopolysaccharide-rich outer membrane of Gram-negative bacteria or the ergosterol-containing fungal membrane, serve as essential targets for various antimicrobial classes including polymyxins and polyenes [1][2]. Conversely, epithelial cell membranes in the host act as protective barriers that drugs must ideally spare to avoid systemic toxicity. The therapeutic index of membrane-active drugs depends heavily on their selectivity for unique microbial lipid compositions over the cholesterol-rich membranes of human epithelial cells [3]. Disruption of these membranes typically leads to the leakage of essential intracellular components, loss of transmembrane potential, and rapid cell death [4]. Understanding the biophysical differences between these membrane types is crucial for developing agents that treat infections while minimizing damage to host tissues like the kidneys or nerves [5].

Other names

Cellular membranesPlasma membranesPhospholipid bilayersBiological membranes

Membrane permeabilization, pore formation, and physical disruption of the lipid bilayer leading to cytoplasmic leakage.