Pathogenic vaginal bacterial adhesion proteins and biofilm matrix

Pathogenic vaginal bacterial adhesion sites and the biofilm matrix are critical structural components in the pathogenesis of bacterial vaginosis (BV) and other vaginal infections. The process is initiated by the adherence of primary pathogens, such as Gardnerella vaginalis, to vaginal epithelial cells using specialized surface proteins called adhesins (Source: Hardy et al., 2017, "The Gardnerella vaginalis biofilm: life in resistance"). This attachment leads to the formation of "clue cells," a hallmark of BV where bacteria densely coat the host cell surface. Once established, these bacteria produce an extracellular polymeric substance (EPS) matrix composed of polysaccharides, proteins, and extracellular DNA (eDNA) (Source: Machado et al., 2015, "Biofilm formation by Gardnerella vaginalis"). This biofilm matrix provides a protective scaffold that shields the bacteria from host immune responses and increases their tolerance to standard antibiotics like metronidazole by up to 1000-fold (Source: Swidsinski et al., 2005, "Adherent biofilms in bacterial vaginosis"). The matrix also facilitates the colonization of secondary anaerobic pathogens, creating a complex polymicrobial community. Therapeutic interventions targeting this complex include biofilm-disrupting agents like boric acid and enzymatic treatments that degrade the EPS matrix (Source: Muzny et al., 2019, "The Role of Biofilms in Bacterial Vaginosis"). Additionally, anti-adhesion strategies using probiotics or specific inhibitors aim to prevent the initial colonization of the vaginal mucosa.

Other names

Vaginal biofilmGardnerella vaginalis biofilmMicrobial surface components recognizing adhesive matrix molecules (MSCRAMMs)Extracellular polymeric substances (EPS)Bacterial vaginosis-associated biofilm

Biofilm disruption, inhibition of bacterial adhesion to vaginal epithelium, degradation of extracellular polymeric substances (EPS), competitive inhibition of binding sites by commensal bacteria, and enzymatic cleavage of extracellular DNA (eDNA).