Surface-attached molecules control Staphylococcus aureus quorum sensing and biofilm development.

Area of Science:

• Microbiology
• Materials Science
• Biotechnology

Background:

• Bacteria utilize quorum sensing (QS) for coordinated behaviors like virulence and biofilm formation.
• QS involves autoinducer signal molecules for population-wide communication.
• Controlling bacterial collective behaviors is crucial for preventing infections and managing microbial communities.

Purpose of the Study:

• To develop and evaluate surfaces coated with QS-manipulating molecules for controlling bacterial collective behaviors.
• To investigate the efficacy of pro- and anti-QS molecules immobilized on surfaces against Staphylococcus aureus.
• To assess the durability and applicability of these modified surfaces in various conditions.

Main Methods:

• Covalent attachment of pro- and anti-quorum sensing molecules to surfaces using click chemistry.
• Testing the ability of modified surfaces to influence Staphylococcus aureus behavior.
• Evaluating surface performance under conditions simulating real-world applications (storage, repeated infections, host plasma, flow).

Main Results:

• Quorum-sensing-manipulating molecules retain their activity when covalently attached to surfaces.
• Modified surfaces demonstrated the ability to resist colonization by Staphylococcus aureus.
• The surface approach proved robust against long-term storage, repeated infections, host plasma, and flow stresses.

Conclusions:

• Surface-based manipulation of bacterial quorum sensing offers a viable strategy for creating colonization-resistant materials.
• This approach can be adapted to control both pathogenic and beneficial bacterial behaviors on surfaces.
• The findings pave the way for novel antimicrobial materials and strategies for managing bacterial communities.