Bacterial biofilm matrix and cellular components (EPS)

Bacterial biofilm matrix and cellular components refer to the complex, self-produced extracellular polymeric substances (EPS) and the embedded bacterial cells that characterize biofilm growth. The matrix is primarily composed of exopolysaccharides, proteins, extracellular DNA (eDNA), and lipids, which provide structural stability and a protective barrier against environmental stressors, host immune responses, and antimicrobial agents (PMID: 20844530). Biofilms are central to the pathogenesis of numerous chronic and healthcare-associated infections, including those involving medical implants, cystic fibrosis lungs, and chronic wounds (PMID: 10334980). Therapeutic strategies targeting the biofilm matrix aim to degrade its structural components or inhibit their synthesis, thereby weakening the biofilm and restoring the efficacy of conventional antibiotics (PMID: 28362156). Examples of such interventions include the use of enzymes like DNase I to target eDNA or glycoside hydrolases to break down polysaccharides (PMID: 27510863).

Other names

Extracellular polymeric substancesBiofilm matrixBacterial biofilmExtracellular matrix (bacterial)Biofilm-associated proteinsExtracellular DNA (eDNA)

The primary mechanisms include the enzymatic degradation of extracellular polymeric substances (EPS) such as eDNA and polysaccharides, inhibition of the initial attachment of bacterial cells, and the disruption of quorum sensing pathways to prevent biofilm maturation (PMID: 28362156). These actions increase the permeability of the biofilm, allowing conventional antibiotics and host immune cells to reach and eliminate the embedded bacteria (PMID: 27510863).