Bacterial cell membrane and oral biofilm

The bacterial cell membrane and oral biofilm constitute a multi-component therapeutic target essential for maintaining oral health and preventing systemic complications. The bacterial membrane is a semi-permeable phospholipid bilayer that regulates transport and maintains electrochemical gradients, while the oral biofilm is a resilient, three-dimensional community of microbes encased in an extracellular polymeric substance (EPS) matrix (Flemming & Wingender, 2010, Nature Reviews Microbiology). This target is central to the pathogenesis of dental caries, gingivitis, and periodontitis, as the biofilm protects pathogens from host immune responses and environmental stressors (NIH/NIDCR). Therapeutic interventions, such as antiseptic mouthwashes containing chlorhexidine or essential oils, aim to compromise the structural integrity of the bacterial membrane or destabilize the biofilm architecture (Jones, 1997, Dental Update). Effective targeting requires overcoming the physical barrier of the EPS matrix to ensure drug penetration to the underlying sessile bacteria. However, clinicians must balance efficacy with the risk of disrupting the commensal oral microbiota, which serves a protective role against opportunistic pathogens.

Other names

Dental plaqueOral microbial biofilmBacterial cytoplasmic membraneExtracellular polymeric substance matrix

Drugs targeting the bacterial cell membrane typically act by disrupting the phospholipid bilayer, increasing permeability and causing the leakage of essential intracellular ions and molecules (McDonnell & Russell, 1999, Clinical Microbiology Reviews). In the context of oral biofilms, agents may also disrupt the extracellular polymeric substance (EPS) matrix, inhibit bacterial adhesion to the pellicle, or interfere with quorum sensing pathways to prevent biofilm maturation and enhance the penetration of antimicrobial agents (Marsh, 2004, BMC Oral Health).