Bacterial biofilm extracellular polymeric substance matrix and bacterial cell membrane (EPS matrix and cell membrane)

The bacterial biofilm extracellular polymeric substance (EPS) matrix and bacterial cell membranes represent a critical structural and protective barrier for microbial communities. The EPS matrix is a complex assembly of polysaccharides, proteins, and extracellular DNA (eDNA) that anchors bacteria to surfaces and shields them from host immune responses and antimicrobial penetration (Flemming & Wingender, 2010, Nature Reviews Microbiology). Beneath this matrix, the bacterial cell membrane serves as the primary metabolic and osmotic barrier, maintaining cellular integrity and regulating transport. Therapeutic strategies targeting these structures involve the use of matrix-degrading enzymes, such as Dornase alfa, to break down the physical scaffold, or membrane-active agents like daptomycin and polymyxins that induce pore formation and cell death (Hall & Mah, 2017, FEMS Microbiology Reviews). Disrupting these components is essential for treating recalcitrant chronic infections where traditional antibiotics fail due to poor penetration or the presence of persistent bacterial cells (Pozo & Patel, 2007, Clinical Pharmacology & Therapeutics). Furthermore, targeting the membrane remains a cornerstone of treating multi-drug resistant Gram-negative and Gram-positive pathogens (Humphries et al., 2013, Clinical Microbiology Reviews).

Other names

Biofilm matrixExtracellular polymeric substancesEPSBacterial cell envelopeMicrobial biofilmBiofilm scaffold

Enzymatic degradation of matrix components such as extracellular DNA or polysaccharides to increase antibiotic penetration; physical disruption of the bacterial lipid bilayer through pore formation, depolarization, and leakage of intracellular contents.