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Related Experiment Video

Updated: Jul 17, 2026

Nanomechanics of Drug-target Interactions and Antibacterial Resistance Detection
11:56

Nanomechanics of Drug-target Interactions and Antibacterial Resistance Detection

Published on: October 25, 2013

"Gold nanoparticle-based nanotheranostics for combating global antimicrobial resistance: a docking-guided

Kavya Arunsi1, Sampada Pendse2, Bignya R Dash3

  • 1Centre for Research in Pure and Applied Sciences, Jain University, JP Nagar, Bangalore, Bengaluru, 560069, India.

Biomedical Physics & Engineering Express
|July 15, 2026
PubMed
Summary

This study developed quercetin-conjugated gold nanoparticles for image-guided therapy against antibiotic resistance. The novel nanotheranostics demonstrated enhanced antibacterial activity and confirmed Quercetin

Keywords:
LasBP. aeruginosaQuercetin conjugated gold nanoparticlesS. aureusSrtA

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Area of Science:

  • Nanotechnology
  • Materials Science
  • Pharmacology

Background:

  • Global rise in antimicrobial resistance (AMR) necessitates novel therapeutic strategies.
  • Natural flavonoids, like Quercetin, show promise against resistant bacteria.
  • Combining nanotechnology with flavonoids offers enhanced antibacterial efficacy.

Purpose of the Study:

  • To develop smart nanotheranostics using gold nanoparticles conjugated with Quercetin (Qe-AuNPs).
  • To evaluate the image-guided antibacterial therapy potential of these nanoformulations.
  • To assess the efficacy of Qe-AuNPs against AMR bacterial strains.

Main Methods:

  • Chemical synthesis of gold nanoparticles conjugated with Quercetin.
  • Characterization of nanoformulations for stability, biocompatibility, and conjugation efficacy (96%).
  • In vitro antimicrobial assays (% inhibition, MIC, GSH activity), cellular uptake studies (fluorescence microscopy), live-dead staining, and in-silico analysis.

Main Results:

  • Successfully synthesized stable, biocompatible Qe-AuNPs with high conjugation efficiency.
  • Demonstrated significantly enhanced antibacterial activity of Qe-AuNPs compared to Quercetin alone against Staphylococcus aureus and Pseudomonas aeruginosa.
  • Confirmed concentration-dependent mechanism of action and potential for image-guided therapy.

Conclusions:

  • Quercetin-conjugated gold nanotheranostics exhibit potent antibacterial activity against AMR strains.
  • The developed nanoplatform effectively merges therapeutic and imaging modalities.
  • This approach presents a promising strategy for combating future antibiotic resistance.