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Updated: Aug 14, 2025

Nanomechanics of Drug-target Interactions and Antibacterial Resistance Detection
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Conformationally restricted, dipeptide-based, self-assembled nanoparticles for efficient vancomycin delivery.

Nitin Yadav1,2, Utkarsh Kumar1, Virander Singh Chauhan1

  • 1Molecular Medicine Group, International Centre for Genetic Engineering & Biotechnology, Aruna Asaf Ali Marg, New Delhi, 110067, India.

Nanomedicine (London, England)
|January 16, 2023
PubMed
Summary
This summary is machine-generated.

Novel nanoparticles effectively deliver vancomycin (Van), overcoming bacterial resistance and improving treatment. This nanodelivery system shows double the efficacy in treating Staphylococcus aureus infections in mice compared to conventional Van.

Keywords:
antibiotic deliverynanostructuresself-assemblysustained releaseultrashort peptides

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Area of Science:

  • Pharmaceutical Sciences
  • Nanotechnology
  • Infectious Diseases

Background:

  • Rising vancomycin (Van) resistance is a significant clinical challenge.
  • Van's short half-life necessitates frequent dosing, impacting patient compliance and efficacy.
  • Nanodelivery systems offer a promising strategy for sustained drug release and improved therapeutic outcomes.

Purpose of the Study:

  • To develop and evaluate a novel nanodelivery system for vancomycin (Van-RΔF).
  • To assess the efficacy of Van-RΔF nanoparticles against Staphylococcus aureus infections.
  • To investigate the potential of sustained Van release to overcome resistance and improve treatment.

Main Methods:

  • Synthesis of arginine-α,β-dehydrophenylalanine (RΔF) via solution-phase synthesis.
  • Self-assembly of RΔF into nanospheres for entrapping Van (Van-RΔF nanoparticles).
  • In vitro efficacy assessed using broth microdilution; in vivo efficacy evaluated in a mouse thigh infection model.

Main Results:

  • Van-RΔF nanoparticles demonstrated efficient inhibition of Staphylococcus aureus growth in vitro.
  • Van alone exhibited limited growth inhibition in vitro.
  • Intravenous administration of Van-RΔF in mice showed a twofold increase in therapeutic efficacy compared to Van alone.

Conclusions:

  • Van-RΔF nanoparticles represent a highly effective nanodelivery system for vancomycin.
  • This system shows significant potential for enhanced treatment of bacterial infections, particularly those involving vancomycin-resistant strains.
  • Further development of Van-RΔF nanoparticles is warranted for clinical applications.