Novel Composite of Iron Oxide Magnetic Nanoparticles Shows Efficacy Against Antibiotic-Resistant Staphylococcus aureus

Strategic Insights -

Researchers at Islamic Azad University in Rasht, Iran, have developed a novel composite of iron oxide magnetic nanoparticles functionalized by glutamic acid and conjugated with thiosemicarbazide, which shows promise in inhibiting the expression of the norB gene in Staphylococcus aureus strains. The composite, known as Fe3O4@Glu-TSC NP, demonstrated improved efficacy compared to its individual components, reducing the expression of the norB gene by up to 50% in comparison with the control group. The study suggests that this novel composite could serve as a potential inhibitor of bacterial efflux pump genes against antibiotic-resistant bacteria, but further studies are needed to determine its safety for medicinal applications.

Key Takeaways:

  • The novel composite of iron oxide magnetic nanoparticles functionalized by glutamic acid and conjugated with thiosemicarbazide (Fe3O4@Glu-TSC NP) shows improved efficacy against Staphylococcus aureus compared to its individual components.
  • The expression of the norB gene was reduced by up to 50% in the presence of Fe3O4@Glu-TSC NP compared to the control group.
  • The minimum inhibitory concentration (MIC) value of the functionalized nanoparticle decreased by two folds towards each Staphylococcus aureus strain in comparison with the Fe3O4 NP (alone).
  • The physical analysis of NP revealed proper synthesis, dispersion, and stability, as well as the spherical/cubic morphology with a mean size of 35-60 nm.
  • The study suggests that Fe3O4@Glu-TSC NP could serve as a potential inhibitor of bacterial efflux pump genes against antibiotic-resistant bacteria.
  • Further studies are needed to determine the safety of nanoparticles for medicinal applications.

Statistics:

  • Mean size of Fe3O4@Glu-TSC NP: 35-60 nm.
  • Reduction in norB gene expression: up to 50%.
  • Decrease in minimum inhibitory concentration (MIC) value: two folds.
  • Number of Staphylococcus aureus strains tested: multiple strains.
  • Researchers involved: Ali Salehzadeh, Erfan Safarnejad, Hamid Reza Rahmatollahi, Zeinab Moradi-Shoeili, and Amir Jalali.

Sources:

  • "A Novel Fe3o4 Magnetic Nanoparticles Functionalized By Glutamic Acid and Conjugated With Thiosemicarbazide Alter the Expression of Norb Gene, In Staphylococcus Aureus." Micro & Nano Letters, 2022.
  • NewsRx. New Staphylococcus aureus Findings from Islamic Azad University Discussed (A Novel Fe3o4 Magnetic Nanoparticles Functionalized By Glutamic Acid and Conjugated With Thiosemicarbazide Alter the Expression of Norb Gene, In Staphylococcus Aureus). Nanotechnology Weekly. March 21, 2022; p 1179.