Reactive metal boride nanoparticles trap lipopolysaccharide and peptidoglycan for bacteria-infected wound healing

Area of Science:

• Materials Science
• Biomedical Engineering
• Nanotechnology

Background:

• Non-healing wounds are often caused by bacterial infection and excessive inflammation.
• Current treatments primarily target bacterial survival, neglecting inflammation from dead bacteria-associated molecules like lipopolysaccharide (LPS) and peptidoglycan (PGN).

Purpose of the Study:

• To develop a boron-trapping strategy using metal boride nanoparticles (MB NPs) to simultaneously address bacterial infection and excessive inflammation in wound healing.
• To investigate the mechanism by which MB NPs inhibit bacterial growth and reduce inflammation.

Main Methods:

• Synthesis of reactive metal boride nanoparticles (MB NPs).
• In vitro and in vivo studies to evaluate the efficacy of MB NPs in wound healing models.
• Analysis of nanoparticle hydrolysis, microenvironment changes, and molecular trapping mechanisms.

Main Results:

• MB NPs gradually hydrolyze, releasing boron dihydroxy groups and metal cations, creating an alkaline microenvironment.
• The alkaline microenvironment enhances boron dihydroxy groups' ability to trap LPS and PGN via esterification.
• This trapping mechanism promotes bacterial death and inhibits inflammation, leading to accelerated wound healing in vitro and in vivo.

Conclusions:

• The boron-trapping strategy using MB NPs offers a dual approach to treat bacterial infections and associated inflammation in wounds.
• This method effectively manages both bacterial presence and inflammatory triggers from dead bacteria.
• MB NPs represent a promising therapeutic agent for accelerating wound healing by addressing key pathological factors.