Kinetics of elimination and distribution in blood and liver of biocompatible ferrofluids based on Fe3O4 nanoparticles: An EPR and XRF study

In this study, we evaluated the biodistribution and the elimination kinetics of a biocompatible magnetic fluid, Endorem™, based on dextran-coated Fe3O4 nanoparticles endovenously injected into Winstar rats. The iron content in blood and liver samples was recorded using electron paramagnetic resonanc...

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Bibliographic Details
Published in:Materials Science & Engineering C 2008-05, Vol.28 (4), p.519-525
Main Authors: Gamarra, L.F., Pontuschka, W.M., Amaro, E., Costa-Filho, A.J., Brito, G.E.S., Vieira, E.D., Carneiro, S.M., Escriba, D.M., Falleiros, A.M.F., Salvador, V.L.
Format: Article
Language:English
Subjects:
Biodistribution
Endorem
EPR
Ferrofluid
Nanoparticle
XRF
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Summary:In this study, we evaluated the biodistribution and the elimination kinetics of a biocompatible magnetic fluid, Endorem™, based on dextran-coated Fe3O4 nanoparticles endovenously injected into Winstar rats. The iron content in blood and liver samples was recorded using electron paramagnetic resonance (EPR) and X-ray fluorescence (XRF) techniques. The EPR line intensity at g=2.1 was found to be proportional to the concentration of magnetic nanoparticles and the best temperature for spectra acquisition was 298 K. Both EPR and XRF analysis indicated that the maximum concentration of iron in the liver occurred 95 min after the ferrofluid administration. The half-life of the magnetic nanoparticles (MNP) in the blood was (11.6±0.6) min measured by EPR and (12.6±0.6) min determined by XRF. These results indicate that both EPR and XRF are very useful and appropriate techniques for the study of kinetics of ferrofluid elimination and biodistribution after its administration into the organism.
ISSN:0928-4931
1873-0191
DOI:10.1016/j.msec.2007.06.005