Inhibiting Pathogen Surface Adherence by Multilayer Polyelectrolyte Films Functionalized with Glucofuranose...

Area of Science:

• Materials Science
• Biotechnology
• Surface Chemistry

Background:

• Preventing pathogenic bacterial adherence to surfaces is crucial for inhibiting biofilm formation.
• Multilayer polyelectrolyte films offer potential as antibacterial materials.
• Current strategies often involve killing bacteria, posing environmental and resistance concerns.

Purpose of the Study:

• To design and develop novel carbohydrate polyelectrolyte films for antibacterial coatings.
• To investigate the efficacy of these films in preventing the adherence and biofilm formation of key bacterial pathogens.
• To explore a green, non-lethal approach to controlling bacterial surface contamination.

Main Methods:

• Fabrication of multilayer polyelectrolyte films using functionalized poly(maleic anhydride-alt-styrene) and quaternized poly(4-vinylpyridine).
• Testing the films' ability to prevent adherence of Pseudomonas aeruginosa and Salmonella Typhimurium.
• Utilizing atomic force microscopy to analyze bacterial morphology on the film surfaces.
• Correlating film properties (thickness, wettability, surface energy, polyelectrolyte conformation) with antibacterial activity.

Main Results:

• The designed polyelectrolyte films effectively prevented the adherence of Pseudomonas aeruginosa and Salmonella Typhimurium.
• Films with over 10 layers significantly reduced bacterial populations.
• Atomic force microscopy revealed morphological damage to bacteria that remained on the film.
• Antibacterial capacity was linked to film thickness, wettability, surface energy, and carbohydrate group conformation.

Conclusions:

• Carbohydrate polyelectrolyte films provide an effective strategy for preventing pathogenic bacterial surface adherence and biofilm formation.
• This approach offers a green, non-lethal method for controlling bacterial contamination, preserving bacterial integrity.
• The findings highlight the importance of film properties and polyelectrolyte structure in determining antibacterial efficacy.