New Antiadhesive Hydrophobic Polysiloxanes

Area of Science:

• Materials Science
• Microbiology
• Biotechnology

Background:

• Silicone materials exhibit intrinsic hydrophobicity, promoting bacterial settlement and biofilm formation.
• Biofilm development on medical devices can lead to pathogen transmission and infections.

Purpose of the Study:

• To develop novel antimicrobial hydrophobic silicones as an anti-biofilm strategy.
• To functionalize polysiloxanes with specific thioethyl groups to impart antimicrobial properties.

Main Methods:

• Grafting polysiloxanes with 2-(carboxymethylthioethyl)-, 2-(n-propylamidomethylthioethyl)-, and 2-(mercaptoethylamidomethylthioethyl)- groups.
• Testing antimicrobial properties against bacteria (Staphylococcus aureus, Escherichia coli, Agrobacterium tumefaciens, Aeromonas hydrophila), fungi (Aureobasidium pullulans), and algae (Chlorella vulgaris).
• Evaluating antibiofilm activity and adhesion properties on modified surfaces compared to control glass.

Main Results:

• Functionalized silicones demonstrated broad-spectrum antimicrobial activity.
• Significant antibiofilm efficacy was observed, particularly against Aeromonas hydrophila.
• Modified surfaces showed an 18-fold reduction in Aeromonas hydrophila adhesion compared to control glass.

Conclusions:

• Novel antimicrobial hydrophobic silicones are effective antibacterial and antibiofilm agents.
• These materials offer a promising approach to prevent pathogen transmission associated with silicone surfaces.
• The developed functionalized polysiloxanes represent valuable agents for anti-biofilm applications.