Peptide functionalized superparamagnetic iron oxide nanoparticles as MRI contrast agents

Selim Sulek, Busra Mammadov, Davut I. Mahcicek, Huseyin Sozeri, Ergin Atalar, Ayse B. Tekinay, Mustafa O. Guler

Research output: Contribution to journalArticlepeer-review

35 Scopus citations


Magnetic resonance imaging (MRI) attracts great attention in cellular and molecular imaging due to its non-invasive and multidimensional tomographic capabilities. Development of new contrast agents is necessary to enhance the MRI signal in tissues of interest. Superparamagnetic iron oxide nanoparticles (SPIONs) are used as contrast agents for signal enhancement as they have revealed extraordinary magnetic properties at the nanometre size and their toxicity level is very low compared to other commercial contrast agents. In this study, we developed a new method to functionalize the surface of SPIONs. Peptide amphiphile molecules are used to coat SPIONs non-covalently to provide water solubility and to enhance biocompatibility. Superparamagnetic properties of the peptide-SPION complexes and their ability as contrast agents are demonstrated. In vitro cell culture experiments reveal that the peptide-SPION complexes are biocompatible and are localized around the cells due to their peptide coating.

Original languageEnglish (US)
Pages (from-to)15157-15162
Number of pages6
JournalJournal of Materials Chemistry
Issue number39
StatePublished - Oct 21 2011
Externally publishedYes

ASJC Scopus subject areas

  • Materials Chemistry
  • Chemistry(all)


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