The One Year Fate of Iron Oxide Coated Gold Nanoparticles in Mice

Jelena Kolosnjaj-Tabi, Yasir Javed, Lénaic Lartigue, Jeanne Volatron, Dan Elgrabli, Iris Marangon, Giammarino Pugliese, Benoit Caron, Albert Figuerola, Nathalie Luciani, Teresa Pellegrino, Damien Alloyeau, Florence Gazeau*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

163 Scopus citations


(Figure Presented). Safe implementation of nanotechnology and nanomedicine requires an in-depth understanding of the life cycle of nanoparticles in the body. Here, we investigate the long-term fate of gold/iron oxide heterostructures after intravenous injection in mice. We show these heterostructures degrade in vivo and that the magnetic and optical properties change during the degradation process. These particles eventually eliminate from the body. The comparison of two different coating shells for heterostructures, amphiphilic polymer or polyethylene glycol, reveals the long lasting impact of initial surface properties on the nanocrystal degradability and on the kinetics of elimination of magnetic iron and gold from liver and spleen. Modulation of nanoparticles reactivity to the biological environment by the choice of materials and surface functionalization may provide new directions in the design of multifunctional nanomedicines with predictable fate.

Original languageEnglish (US)
Pages (from-to)7925-7939
Number of pages15
JournalACS Nano
Issue number8
StatePublished - Aug 25 2015
Externally publishedYes

Bibliographical note

Publisher Copyright:
© 2015 American Chemical Society.


  • aging
  • biodistribution
  • degradation
  • elimination
  • gold nanoparticles
  • heterostructure
  • iron oxide nanoparticles
  • nanotoxicity

ASJC Scopus subject areas

  • General Materials Science
  • General Engineering
  • General Physics and Astronomy


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