Bacterial biofilm and microbial cell membrane

Bacterial biofilms and microbial cell membranes are fundamental structural components that serve as primary targets for antimicrobial agents. The microbial cell membrane is a lipid bilayer that maintains cellular integrity and regulates the transport of ions and nutrients (Epand, R. M., et al., 2016, Biochimica et Biophysica Acta). Bacterial biofilms are organized communities of microorganisms embedded in a self-produced extracellular polymeric substance (EPS) matrix, which provides a physical barrier against environmental stressors (Donlan, R. M., 2002, Emerging Infectious Diseases). These structures play a significant role in disease by facilitating chronic infections and providing high levels of resistance to both host immune responses and traditional antibiotics (Hall-Stoodley, L., et al., 2004, Nature Reviews Microbiology). Therapeutic agents like daptomycin and polymyxins target the cell membrane by inducing depolarization or physical disruption, leading to cell lysis (Heidary, M., et al., 2018, Journal of Cellular Physiology). Biofilm-specific therapies aim to degrade the EPS matrix or interfere with quorum sensing to disperse the microbial community and restore antibiotic sensitivity (Roy, R., et al., 2018, Virulence). Challenges in targeting these structures include the potential for host cell toxicity and the difficulty of achieving effective drug concentrations within the dense biofilm architecture. Understanding the molecular composition of these targets is essential for developing next-generation treatments for multidrug-resistant infections.

Other names

Extracellular polymeric substance (EPS)Bacterial envelopeMicrobial lipid bilayerBiofilm matrix

Disruption of lipid bilayer integrity, pore formation, degradation of extracellular polymeric substances (EPS), inhibition of quorum sensing, and physical detachment of the biofilm matrix.