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Membrane-active peptide PV3 efficiently eradicates multidrug-resistant Pseudomonas aeruginosa in a mouse model of

Hamed Memariani1, Delavar Shahbazzadeh1, Jean-Marc Sabatier2

  • 1Venom and Biotherapeutics Molecules Lab., Medical Biotechnology Department, Biotechnology Research Center, Pasteur Institute of Iran, Tehran, Iran.

APMIS : Acta Pathologica, Microbiologica, Et Immunologica Scandinavica
|January 13, 2018
PubMed

Insights

Peptide PV3 demonstrates potent topical bactericidal activity against multidrug-resistant Pseudomonas aeruginosa. This novel antimicrobial agent effectively eradicates bacteria in a mouse burn model with no observed skin toxicity.

Area of Science:

  • Antimicrobial Peptides
  • Bacteriology
  • Wound Infection Models

Background:

  • Multidrug-resistant (MDR) Pseudomonas aeruginosa poses a significant threat in clinical settings.
  • Development of novel antimicrobial agents is crucial to combat antibiotic resistance.

Purpose of the Study:

  • To evaluate the topical bactericidal efficacy of peptide PV3 against MDR Pseudomonas aeruginosa.
  • To assess the safety and killing kinetics of PV3 in a mouse burn infection model.

Main Methods:

  • Structural analysis of PV3 using circular dichroism spectroscopy.
  • Confocal microscopy to determine the mechanism of action.
  • In vitro and in vivo efficacy testing in a mouse burn wound model comparing PV3 to doripenem.
  • Histopathological analysis of mouse skin for toxicity assessment.

Main Results:

  • Peptide PV3 showed high helical content in a hydrophobic buffer, indicating structural adaptability.
  • PV3 demonstrated superior in vitro activity and faster killing kinetics than doripenem.
  • A single topical dose of PV3 eradicated MDR P. aeruginosa in a mouse burn model, while doripenem failed.
  • Histopathology confirmed no topical skin toxicity associated with PV3 treatment.

Conclusions:

  • Peptide PV3 exhibits potent, rapid, and safe topical bactericidal activity against MDR P. aeruginosa.
  • PV3 is a promising candidate antimicrobial agent for treating infections caused by antibiotic-resistant bacteria.
  • The findings support further investigation of PV3 as a therapeutic option for resistant bacterial infections.
Keywords:
Pseudomonas aeruginosaantimicrobial peptidesburn infectionmouse model

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