Laser-responsive sequential delivery of multiple antimicrobials using nanocomposite hydrogels

Area of Science:

• Biomaterials Science
• Nanotechnology
• Drug Delivery Systems

Background:

• Antibiotic resistance necessitates advanced drug delivery methods.
• Controlled release of antimicrobials can mitigate adverse effects and enhance efficacy.
• Nanocomposite hydrogels offer potential for sophisticated therapeutic delivery.

Purpose of the Study:

• To develop a nanocomposite hydrogel for precise, sequential antimicrobial and adjuvant delivery.
• To utilize photothermal properties of polydopamine nanoparticles and liposome transitions for triggered release.
• To demonstrate the prevention of bacterial growth through controlled drug release.

Main Methods:

• Fabrication of a nanocomposite hydrogel incorporating polydopamine nanoparticles and liposomes.
• Loading of an antibiotic and its adjuvant into the hydrogel system.
• Application of near-infrared (NIR) laser irradiation to trigger sequential release.
• Assessment of bacterial growth inhibition post-treatment.

Main Results:

• The nanocomposite hydrogel demonstrated controlled, sequential release of the antibiotic and adjuvant upon NIR laser stimulation.
• Polydopamine nanoparticles facilitated photothermal conversion for precise temperature control.
• Liposome transition temperatures were exploited for distinct release phases.
• Effective prevention of bacterial growth was observed with the sequential delivery system.

Conclusions:

• A novel nanocomposite hydrogel system enables precise, NIR-triggered sequential delivery of antimicrobials and adjuvants.
• This approach offers a promising strategy for combating bacterial infections while minimizing side effects.
• The developed system represents a significant advancement in controlled drug delivery for infectious diseases.