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Published on: May 8, 2013
Bactericidal activity of starch-encapsulated gold nanoparticles
Dillon S Pender1, Lakshmisri M Vangala, Vivek D Badwaik
1Department of Chemistry, Western Kentucky University, Bowling Green, KY 42101-1079, USA.
Frontiers in Bioscience (Landmark Edition)
|June 11, 2013
Summary
Eco-friendly starch encapsulated gold nanoparticles (St-AuNPs) show potent antibacterial effects. These biocompatible nanoparticles effectively eradicate both Gram-positive and Gram-negative bacteria in a dose-dependent manner.
Area of Science:
- Nanotechnology
- Microbiology
- Materials Science
Background:
- Antimicrobial resistance necessitates novel therapeutic strategies.
- Gold nanoparticles (AuNPs) exhibit promising antimicrobial properties.
- Developing eco-friendly and biocompatible nanoparticle delivery systems is crucial.
Purpose of the Study:
- To investigate the bactericidal applications of starch-encapsulated gold nanoparticles (St-AuNPs).
- To elucidate the interaction mechanisms of St-AuNPs with Gram-negative and Gram-positive bacteria.
- To evaluate the biocompatibility and antimicrobial efficacy of St-AuNPs.
Main Methods:
- Characterization of St-AuNPs.
- Spread plate assay to determine bacterial viability.
- Transmission electron microscopy (TEM) for morphological analysis.
- Fluorescent propidium iodide (PI) exclusion assay to assess cell membrane integrity.
Main Results:
- St-AuNPs demonstrated significant dose-dependent antibacterial activity against both Gram-positive and Gram-negative bacteria.
- 98% eradication of Gram-positive bacteria was achieved with 1.2 mg/mL St-AuNPs within 12 hours.
- 98% eradication of Gram-negative bacteria was achieved with 4.8 mg/mL St-AuNPs within 12 hours.
- St-AuNPs were found to be biocompatible.
Conclusions:
- St-AuNPs represent an effective and eco-friendly antimicrobial agent.
- The carbohydrate-based polymer vehicle offers a promising platform for nanoparticle delivery.
- St-AuNPs exhibit excellent antimicrobial activity against a broad spectrum of bacteria.
