Oropharyngeal microbial cell membrane

The oropharyngeal microbial cell membrane refers to the plasma membranes of bacteria and other microorganisms inhabiting the oropharynx, primarily consisting of phospholipid bilayers with embedded proteins that form a selective barrier in prokaryotic cells. In Gram-negative bacteria, which dominate many oral microbiomes, there is an asymmetric outer membrane rich in lipopolysaccharide (LPS) on the external leaflet and phospholipids internally, contributing to structural integrity and resistance to environmental stresses[1][2][3]. These membranes facilitate essential functions such as nutrient uptake, ion transport, and the release of membrane vesicles (MVs) that deliver virulence factors, toxins, and immunomodulatory components to host cells during infections[1][2]. In pathogenic contexts like oral biofilms or opportunistic infections (e.g., Pseudomonas aeruginosa in cystic fibrosis), MVs from these membranes promote bacterial survival by neutralizing antibiotics, phages, and enabling DNA transfer or surface remodeling under stress[1][2]. While not a specific therapeutic target like a receptor or enzyme, these membranes indirectly influence disease by harboring resistance mechanisms and triggering host inflammation via LPS exposure[1][2]. Drug interactions typically target cell wall synthesis upstream (e.g., beta-lactams) rather than the membrane itself, with vesicles potentially sequestering antibiotics to sustain chronic infections[2].

Other names

oropharyngeal bacterial cell membranemicrobial plasma membraneGram-negative outer membraneGram-positive cytoplasmic membrane