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Pseudomonas aeruginosa pyocyanin production reduced by quorum-sensing inhibiting nanocarriers

Hoang D Lu1, Elizabeth Pearson1, Kurt D Ristroph1

  • 1Department of Chemical and Biological Engineering, Princeton University, Princeton, NJ 08544, United States.

International Journal of Pharmaceutics
|April 3, 2018
PubMed

Insights

New nanotechnology overcomes antibiotic resistance in Pseudomonas aeruginosa infections. This approach uses nanoformulations to deliver quorum-sensing drugs effectively through pulmonary mucus, disabling virulence without promoting resistance.

Area of Science:

  • Biotechnology
  • Nanotechnology
  • Microbiology

Background:

  • Pseudomonas aeruginosa is a problematic pathogen causing difficult-to-treat infections due to rising antibiotic resistance.
  • Quorum-sensing (QS) therapeutics offer a promising alternative by targeting virulence without driving resistance.
  • Pulmonary drug delivery is hindered by mucus barriers, limiting QS therapeutic efficacy.

Purpose of the Study:

  • To develop novel, mucus-penetrating nanoformulations for QS-based therapeutics against Pseudomonas aeruginosa.
  • To create tunable nanocarriers capable of delivering QS drugs effectively to pulmonary infections.
  • To demonstrate the potential of nanoformulation in overcoming delivery challenges for anti-virulence strategies.

Main Methods:

  • Utilized Flash NanoPrecipitation, a block copolymer-directed self-assembly process.
  • Engineered QS-active nanoparticles with tunable sizes (70-400 nm) and release rates (1 hour to 14 days).
  • Tested nanoparticle penetration through human cystic fibrosis pulmonary mucus and inhibition of P. aeruginosa virulence.

Main Results:

  • Developed fully water-dispersible, stable, and mucus-penetrating QS-active nanoparticles.
  • Demonstrated inhibition of P. aeruginosa virulence without affecting bacterial growth.
  • Successfully showed, for the first time, QS nanocarrier penetration through cystic fibrosis pulmonary mucus.

Conclusions:

  • Nanoformulation strategies are crucial for next-generation antimicrobial therapeutics.
  • This QS nanocarrier platform technology shows promise for treating challenging pulmonary P. aeruginosa infections.
  • The ability to tune particle properties and release kinetics enhances therapeutic potential.
Keywords:
Drug-deliveryMucus penetrationNanocarrierNanoparticlePseudomonas aeruginosaQuorum sensing

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