Light-degradable nanocomposite hydrogels for antibacterial wound dressing applications

Area of Science:

• Biomaterials Science
• Nanotechnology
• Infectious Diseases

Background:

• Bacterial skin infections pose significant health risks.
• Effective wound management requires controlled therapeutic delivery and material degradation.

Purpose of the Study:

• To develop a light-degradable nanocomposite hydrogel for controlled antibiotic delivery and degradation.
• To assess the antibacterial efficacy and biocompatibility of the developed hydrogel system.

Main Methods:

• Incorporation of triclosan-loaded nanogels (TCS-NGs) into a light-degradable poly(ethylene glycol) (PEG) hydrogel matrix.
• Stimulation of hydrogel degradation and TCS-NG release using 365 nm light.
• Evaluation of antibacterial activity against Staphylococcus aureus and cytotoxicity on human dermal fibroblasts.

Main Results:

• The nanocomposite hydrogel rapidly degraded upon light exposure, releasing TCS-NGs.
• Released TCS-NGs demonstrated significant antibacterial efficacy against Staphylococcus aureus in solution and on infected skin.
• All components of the hydrogel exhibited excellent biocompatibility with human dermal fibroblasts (>90% cell viability).

Conclusions:

• The fabricated light-degradable nanocomposite hydrogels offer a promising platform for controlled antibiotic delivery.
• This system demonstrates effective antibacterial action and good biocompatibility, suitable for wound dressing applications.
• Light-triggered degradation provides a novel stimulus for advanced wound care materials.