A critical review on innovative targets for signal disruption in Enterococcus faecalis infection management

Area of Science:

• Microbiology
• Infectious Diseases
• Bacterial Pathogenesis

Background:

• Enterococcus faecalis is a Gram-positive bacterium prevalent in the human gut.
• It poses significant threats, especially to immunocompromised individuals in healthcare settings, due to virulence factors like biofilm formation and antibiotic resistance.
• Quorum sensing systems, specifically Fsr and LuxS, are crucial for E. faecalis virulence, regulating enzymes that stabilize biofilms and facilitate host tissue invasion.

Purpose of the Study:

• To review the role of E. faecalis quorum sensing systems in biofilm formation and pathogenicity.
• To highlight these systems as potential therapeutic targets for combating E. faecalis infections.
• To explore novel strategies for controlling E. faecalis, particularly antibiotic-resistant strains.

Main Methods:

• Literature review focusing on quorum sensing mechanisms in E. faecalis.
• Analysis of the role of Fsr and LuxS systems in virulence factor production and biofilm development.
• Exploration of emerging therapeutic approaches targeting quorum sensing and biofilm formation.

Main Results:

• Quorum sensing systems (Fsr, LuxS) are key regulators of E. faecalis virulence, including biofilm stability and enzyme synthesis (gelatinase, serine protease).
• E. faecalis biofilms exhibit significant resistance to antimicrobial agents, complicating treatment.
• Novel strategies like phages, probiotics, nanoparticles, and phytochemicals show potential in inhibiting quorum sensing and reducing pathogenicity.

Conclusions:

• Targeting E. faecalis quorum sensing pathways presents a promising therapeutic avenue.
• Alternative and complementary strategies to antibiotics are needed to manage E. faecalis infections, especially antibiotic-resistant strains.
• These novel approaches can enhance infection control and therapeutic outcomes in healthcare settings.