Formulation of Antimicrobial Tobramycin Loaded PLGA Nanoparticles via Complexation with AOT

Area of Science:

• * Pharmaceutical Nanotechnology
• * Microbiology
• * Drug Delivery Systems

Background:

• * Aminoglycoside antibiotics like tobramycin are crucial for treating bacterial infections.
• * Effective delivery systems are needed to overcome challenges like poor drug loading in nanoparticles.
• * Pseudomonas aeruginosa infections require sustained drug levels above the minimum inhibitory concentration (MIC).

Purpose of the Study:

• * To develop an effective nanoparticle delivery system for tobramycin.
• * To improve tobramycin loading and sustained release from poly(lactic-co-glycolic) acid (PLGA) nanoparticles.
• * To evaluate the antibacterial efficacy of the developed nanoparticles against Pseudomonas aeruginosa.

Main Methods:

• * Complexation of tobramycin with dioctylsulfosuccinate (AOT).
• * Encapsulation of tobramycin-AOT complexes into poly(lactic-co-glycolic) acid (PLGA) nanoparticles.
• * Assessment of tobramycin loading efficiency and in vitro release kinetics.
• * Evaluation of antibacterial activity against Pseudomonas aeruginosa.

Main Results:

• * Formation of tobramycin-AOT complexes facilitated effective drug loading into PLGA nanoparticles.
• * Nanoparticles demonstrated sustained release of tobramycin.
• * The encapsulated tobramycin retained its antibacterial function and showed efficacy against Pseudomonas aeruginosa.

Conclusions:

• * Complexation with AOT is a viable strategy to overcome poor aminoglycoside loading in PLGA nanoparticles.
• * PLGA nanoparticles loaded with tobramycin-AOT complexes offer a promising approach for enhanced antimicrobial therapy.
• * This delivery system has the potential to improve treatment outcomes for Pseudomonas aeruginosa infections.