Direct evidence for catalase and peroxidase activities of ferritin-platinum nanoparticles

Jia Fan, Jun Jie Yin, Bo Ning, Xiaochun Wu, Ye Hu, Mauro Ferrari, Gregory J. Anderson, Jingyan Wei, Yuliang Zhao, Guangjun Nie

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217 Scopus citations

Abstract

Using apoferritin (apoFt) as a nucleation substrate, we have successfully synthesized 1-2 nm platinum nanoparticles (Pt-Ft) which are highly stable. By directly measuring the products of Pt-Ft-catalyzed reactions, we showed, with no doubt, Pt-Ft possesses both catalase and peroxidase activities. With hydrogen peroxide as substrate, we observed oxygen gas bubbles were generated from hydrogen peroxide decomposed by Pt-Ft; the generation of oxygen gas strongly supports Pt-Ft reacts as catalase, other than peroxidase. While with organic dyes and hydrogen peroxide as substrates, distinctive color products were formed catalyzed by Pt-Ft, which indicates a peroxidase-like activity. Interestingly, these biomimetic properties showed differential response to pH and temperature for different reaction substrates. Pt-Ft showed a significant increase in catalase activity with increasing pH and temperature. The HRP-like activity of Pt-Ft was optimal at physiological temperature and slightly acidic conditions. Our current study demonstrates that Pt-Ft possesses both catalase and peroxidase activities for different substrates under different conditions.

Original languageEnglish (US)
Pages (from-to)1611-1618
Number of pages8
JournalBiomaterials
Volume32
Issue number6
DOIs
StatePublished - Feb 1 2011

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Keywords

  • Biomimetic enzymes
  • Catalase activities
  • ESR
  • Ferritin
  • Nanoparticles

ASJC Scopus subject areas

  • Bioengineering
  • Ceramics and Composites
  • Biophysics
  • Biomaterials
  • Mechanics of Materials

Cite this

Fan, J., Yin, J. J., Ning, B., Wu, X., Hu, Y., Ferrari, M., Anderson, G. J., Wei, J., Zhao, Y., & Nie, G. (2011). Direct evidence for catalase and peroxidase activities of ferritin-platinum nanoparticles. Biomaterials, 32(6), 1611-1618. https://doi.org/10.1016/j.biomaterials.2010.11.004