Microbial cell membranes, biofilms, fungal membranes, and viral envelopes

Microbial cell membranes, biofilms, fungal membranes, and viral envelopes represent the primary physical barriers and structural frameworks of various pathogens. These structures are essential for maintaining cellular homeostasis, regulating nutrient transport, and protecting the pathogen from environmental stressors and host immune responses [1]. In bacteria and fungi, the membrane serves as a scaffold for vital enzymatic processes, while the viral envelope is crucial for host cell entry and protection of the viral genome [2]. Biofilms further complicate treatment by creating a dense extracellular matrix that shields microbial communities from both the immune system and pharmacological agents [3]. Therapeutic strategies targeting these structures often involve direct physical disruption, such as pore formation or lipid sequestration, which leads to rapid lysis and pathogen death [4]. However, the structural similarity between certain microbial lipids and human cell membrane components can lead to significant off-target toxicities, such as nephrotoxicity and hemolysis [5].

Other names

Pathogen barriersMicrobial envelopesExtracellular polymeric substances (EPS)Pathogen lipid bilayers

Membrane permeabilization, pore formation, ergosterol binding, lipid sequestration, physical disruption of the lipid envelope, and inhibition of cell wall/membrane synthesis.