Bacterial biofilm extracellular polymeric substance matrix components (EPS matrix)

Bacterial biofilm matrix components, collectively referred to as the extracellular polymeric substance (EPS) matrix, constitute the functional scaffold that encases and protects microbial communities (Flemming & Wingender, 2010, Nature Reviews Microbiology). This matrix is a heterogeneous mixture of self-produced polysaccharides, proteins, extracellular DNA (eDNA), and lipids that provide structural stability and facilitate adhesion to surfaces (Karygianni et al., 2020, Frontiers in Microbiology). In the context of human disease, the EPS matrix serves as a formidable barrier that limits the penetration of antimicrobial agents and shields bacteria from host immune defenses, contributing to the persistence of chronic infections (Ciofu et al., 2022, Nature Reviews Microbiology). Therapeutic strategies targeting the matrix involve the use of enzymes like DNases and glycoside hydrolases to degrade structural components, or chelating agents to remove stabilizing metal ions (Tetz et al., 2009, Antimicrobial Agents and Chemotherapy). By dismantling this protective architecture, these treatments aim to sensitize the embedded bacteria to conventional antibiotics and promote clearance by the host immune system (StatPearls, 2023, Biofilm Infections).

Other names

Extracellular polymeric substancesBiofilm matrixEPSSlime layerBiofilm scaffoldExtracellular matrix of biofilms

Enzymatic degradation of matrix polymers such as polysaccharides and extracellular DNA, chelation of divalent cations to destabilize the scaffold, and inhibition of EPS biosynthesis to prevent biofilm maturation (Flemming & Wingender, 2010; Tetz et al., 2009).