Simultaneous Bacteria Sensing and On-Demand Antimicrobial Peptide Release.

Area of Science:

• Biomaterials Engineering
• Drug Delivery Systems
• Antimicrobial Therapeutics

Background:

• Developing smart materials for wound care is crucial for effective infection management.
• Current treatments often lack precise control over antimicrobial release, leading to side effects and resistance.
• Simultaneous bacterial detection and targeted antimicrobial peptide (AMP) delivery remain a significant challenge.

Purpose of the Study:

• To engineer a material capable of simultaneously sensing bacterial presence and releasing AMPs on demand.
• To develop a tunable drug delivery system for wound infections.
• To integrate this technology into wound dressings for practical application.

Main Methods:

• Fabrication of a bacteria-sensing hydrogel incorporating AMP-loaded mesoporous silica particles.
• Functionalization of mesoporous silica with light-sensitive linkers for controlled AMP attachment.
• Utilizing trypsin as a bacterial presence surrogate to induce hydrogel shape loss and trigger AMP release upon irradiation.
• Integration of the system into wound dressing fabrics for proof-of-concept demonstration.

Main Results:

• Successful development of a dual-function material for sensing and on-demand AMP release.
• Demonstrated tunable release profiles with concentrations up to 298 μg/mL.
• Validated material fabrication and AMP release using ATR-IR spectroscopy, TGA, and BCA.
• Illustrated the efficacy of released AMPs against *E. coli*.

Conclusions:

• The developed smart material offers simultaneous bacterial sensing and tunable antimicrobial peptide release.
• This technology presents a promising advancement for on-demand wound care applications.
• Potential to reduce side effects associated with conventional treatments and combat antibiotic resistance.