A Photothermally Enhanced Vancomycin-Coated Liquid Metal Antimicrobial Agent with Targeting Capability
Bo Wang1, Sen Chen2, Xuyang Sun1
1School of Biological Science and Medical Engineering, Beihang University, Beijing 100083, China.
Bioengineering (Basel, Switzerland)
|July 29, 2023
Summary
Researchers developed a novel antimicrobial agent by combining gallium-based liquid metals and Vancomycin. This agent shows enhanced targeted efficacy against bacteria, especially when activated by near-infrared light, offering a promising new strategy for combating infections.
Area of Science:
- Materials Science
- Nanotechnology
- Infectious Diseases
Background:
- Vancomycin's antimicrobial efficacy diminishes due to increasing bacterial resistance.
- Gallium-based liquid metals offer a low-resistance alternative but lack targeted antimicrobial effects.
- Combining these agents presents a strategy to overcome individual limitations.
Purpose of the Study:
- To develop a novel, highly efficient antimicrobial agent by integrating gallium-based liquid metals with Vancomycin.
- To investigate the targeted antimicrobial effects and enhanced performance using near-infrared (NIR) light.
- To establish a foundation for potential clinical applications of this hybrid antimicrobial system.
Main Methods:
- Encapsulation of Vancomycin onto the surface of Ga-based liquid metals via their oxide layer, forming a core-shell structure.
- Microscopic observation to confirm the structural integrity and Vancomycin distribution.
- Antibacterial efficacy testing against *S. aureus* and evaluation of photothermal enhancement under 808nm NIR light.
Main Results:
- Successful formation of a core-shell antimicrobial agent with Vancomycin effectively coating the liquid metal surface.
- Demonstrated targeted antimicrobial effects against *S. aureus*, with Vancomycin significantly improving the liquid metal's inherent antibacterial properties.
- NIR light (808nm) exposure resulted in significantly enhanced bactericidal performance, achieving nearly 100% effectiveness due to the liquid metal's photothermal conversion.
Conclusions:
- The integrated Ga-based liquid metal-Vancomycin agent exhibits potent, targeted antimicrobial activity.
- NIR light activation dramatically boosts the agent's bactericidal efficacy, leveraging the photothermal properties of liquid metals.
- This approach represents a promising advancement in antimicrobial strategies, addressing resistance and enhancing therapeutic outcomes for potential clinical use.
