Virulence-Selective Trap-Capture-Kill Antibacterial Nanostructures With Immune-Metabolic Regulation for Treating...

Area of Science:

• Biomaterials Science
• Infectious Diseases
• Orthopedic Surgery

Background:

• Orthopedic implant-associated infections (IAIs) are challenging due to rising antibiotic resistance.
• Effective treatments are needed to combat persistent IAIs and restore bone health.

Purpose of the Study:

• To develop a novel nanostructured antibacterial system for treating IAIs.
• To investigate the system's ability to selectively target and kill bacteria while promoting bone regeneration.

Main Methods:

• Fabrication of a nanostructured antibacterial system (F-14-TNA) using TiO2 nanotube arrays modified with fascaplysin derivative 14 (F-14).
• Evaluation of F-14-TNA's virulence-selective trapping, capture, and killing of bacteria via reactive oxygen species.
• Assessment of biocompatibility, immune microenvironment regulation, and bone metabolism recovery in vitro and in vivo.

Main Results:

• F-14-TNA demonstrated selective trapping and killing of hyperpathogenic bacteria.
• The system effectively regulated the immune microenvironment and restored disordered bone metabolism.
• In vitro and in vivo studies confirmed F-14-TNA's biocompatibility and therapeutic potential.

Conclusions:

• The developed nanostructure provides a novel approach for treating IAIs.
• F-14-TNA offers effective antibacterial activity and promotes local bone tissue regeneration.
• This system addresses the challenges posed by drug-resistant bacteria in orthopedic infections.