Microbial extracellular polymeric substances in the environment, technology and medicine

Area of Science:

• Microbiology
• Environmental Science
• Biotechnology

Background:

• Microbial biofilms are encased in a self-produced matrix of extracellular polymeric substances (EPS), comprising polysaccharides, proteins, extracellular DNA, and lipids.
• EPS play critical roles in natural ecosystems (soils, sediments, marine habitats) and technical systems (wastewater treatment, water distribution), contributing to biofouling and corrosion.
• In medicine, EPS protect pathogens from host defenses and antimicrobials, potentially acting as virulence factors.

Purpose of the Study:

• To review the diverse functions of extracellular polymeric substances (EPS) within microbial biofilms.
• To explore the significance of EPS in environmental, technological, and medical contexts.
• To highlight EPS as a key functional component of biofilms across various applications.

Main Methods:

• Literature review of scientific studies on microbial biofilms and EPS.
• Synthesis of information on EPS composition, properties, and functions.
• Categorization of EPS roles in natural, technical, and medical environments.

Main Results:

• EPS facilitate cell adhesion, matrix cohesion, and interactions with other cells and pollutants.
• EPS contribute to biofouling and microbially influenced corrosion in technical settings.
• EPS offer protection to pathogens in medical biofilms and have potential applications, such as in self-repairing concrete.

Conclusions:

• Extracellular polymeric substances (EPS) are crucial functional components of biofilms with diverse impacts.
• Understanding EPS is vital for managing biofilms in environmental, industrial, and medical fields.
• EPS present both challenges (e.g., biofouling, virulence) and opportunities (e.g., biomaterials).