Siderophore-Functionalized Nanodrug for Treating Antibiotic-Resistant Bacteria

Area of Science:

• Nanotechnology
• Antimicrobial Resistance
• Bacterial Pathogenesis

Background:

• Multidrug-resistant bacteria pose a significant global health threat.
• Antimicrobial resistance necessitates novel therapeutic strategies.
• Nanodrugs offer targeted delivery to overcome resistance mechanisms.

Purpose of the Study:

• To develop and evaluate a siderophore-functionalized nanodrug (AuNP-NSC) for targeting multidrug-resistant bacteria.
• To assess the efficacy of AuNP-NSC against Pseudomonas aeruginosa.
• To investigate the potential of nanodrugs in combating antimicrobial resistance.

Main Methods:

• A gold nanoparticle construct (AuNP-NSC) functionalized with siderophores and N-heterocyclic carbenes was synthesized.
• Targeted delivery of AuNP-NSC into P. aeruginosa was achieved via ferric iron binding.
• In vitro and in vivo studies were conducted using antibiotic-resistant P. aeruginosa models.

Main Results:

• AuNP-NSC significantly inhibited P. aeruginosa proliferation, reducing bacterial counts by over 95%.
• The nanodrug mitigated drug resistance in P. aeruginosa infections.
• AuNP-NSC treatment reduced P. aeruginosa-induced skin lesions and prevented sepsis-related organ failure in mouse models.

Conclusions:

• Siderophore-functionalized nanodrugs represent a promising therapeutic strategy against antibiotic-resistant bacterial infections.
• AuNP-NSC demonstrates significant potential for managing drug-resistant pathogens like P. aeruginosa.
• Nanodrugs can be engineered for targeted delivery, enhancing antimicrobial efficacy and reducing resistance.