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Related Concept Videos

Microorganisms in Medicine and Therapeutics01:29

Microorganisms in Medicine and Therapeutics

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Microorganisms play a fundamental role in vaccine development, gene therapy, and therapeutic production. Their biological properties are harnessed to advance medicine and public health. Beyond immunization, microorganisms contribute to gut health, antibiotic synthesis, and genetic disease treatment.Live Attenuated and Inactivated VaccinesLive attenuated vaccines, such as the measles, mumps, and rubella (MMR) vaccine, utilize weakened forms of pathogens to closely resemble natural infections.
936

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Related Experiment Video

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Analysis of Targeted Viral Protein Nanoparticles Delivered to HER2+ Tumors
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Engineered phage-silver nanoparticle complexes as a new tool for targeted therapies.

Laura Maria De Plano1, Dario Morganti1, Giuseppe Nicotra2

  • 1Department of Chemical, Biological, Pharmaceutical and Environmental Sciences (ChiBioFarAm), University of Messina, Viale F. Stagno d'Alcontres 31, 98166, Messina, Italy.

Scientific Reports
|October 16, 2025
PubMed
Summary

Engineered phage-silver nanoparticle complexes show targeted antibacterial activity against specific E. coli strains. This innovative approach offers precise therapy with minimal impact on beneficial bacteria.

Keywords:
AgNPsAntibiotic resistancePhage displayTargeted therapy.

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Area of Science:

  • Biotechnology
  • Nanotechnology
  • Microbiology

Background:

  • Antibiotic resistance necessitates novel therapeutic strategies.
  • Bacteriophages offer targeted bacterial infection control.
  • Silver nanoparticles possess antimicrobial properties.

Purpose of the Study:

  • To develop and evaluate engineered phage-silver nanoparticle (AgNP) complexes for targeted antibacterial therapy.
  • To assess the selective antimicrobial activity of AgNP@Li5 phage complexes against specific E. coli strains.
  • To explore the potential for customizable targeted therapy by modifying phage display peptides.

Main Methods:

  • Synthesis and characterization of silver nanoparticles (AgNPs).
  • Engineering of M13 bacteriophages (Li5 phage) to display a specific peptide.
  • Combination of AgNPs and engineered phages to form AgNP@Li5 molecular complexes.
  • Evaluation of antibacterial activity and Minimum Inhibitory Concentration (MIC) against various E. coli strains and other bacteria.

Main Results:

  • AgNP@Li5 complexes demonstrated highly selective antibacterial activity against E. coli F+, F-, and O157:H7 strains.
  • Significant inhibition of E. coli TG1 and E. coli F- growth observed at a 1:16 dilution.
  • Reduced but still present activity against E. coli O157:H7 at a 1:8 dilution.
  • Minimal impact on non-target bacterial species (p < 0.0001).

Conclusions:

  • Engineered phage-AgNP complexes provide a precise and targeted approach to combating bacterial infections.
  • The specificity of this system minimizes collateral damage to the microbiome.
  • The platform's modularity allows for customization to target various pathogens and potentially tumors.