Long-term biodistribution and biocompatibility investigation of dextran-coated magnetite nanoparticle using mice as the animal model

Magnetic resonance is used to investigate biodistribution aspects of dextran-coated magnetite nanoparticles (9.4 nm core diameter) in both liver and spleen from 5 minutes up to 6 months after intravenous administration of a magnetic fluid sample in female Swiss mice. Using magnetic resonance data im...

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Bibliographic Details
Published inJournal of biomedical nanotechnology Vol. 8; no. 2; p. 301
Main Authors Estevanato, Luciana L C, Lacava, Leandro M, Carvalho, Luis C F, Azevedo, Ricardo B, Silva, Osni, Pelegrini, Fernando, Báo, Sônia N, Morais, Paulo C, Lacava, Zulmira G M
Format Journal Article
LanguageEnglish
Published United States 01.04.2012
Subjects
Animals
Dextrans - chemistry
Dextrans - pharmacokinetics
Drug Carriers - chemistry
Drug Carriers - pharmacokinetics
Female
Histocytochemistry
Injections, Intravenous
Liver - metabolism
Magnetic Resonance Spectroscopy
Magnetite Nanoparticles - chemistry
Mice
Microscopy, Electron
Models, Animal
Particle Size
Photomicrography
Spleen - metabolism
Tissue Distribution
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Summary:Magnetic resonance is used to investigate biodistribution aspects of dextran-coated magnetite nanoparticles (9.4 nm core diameter) in both liver and spleen from 5 minutes up to 6 months after intravenous administration of a magnetic fluid sample in female Swiss mice. Using magnetic resonance data important parameters such as the absorption half-life (t 1/2 = 12 +/- 2 min in the liver and t 1/2 = 11 +/- 2 min in the spleen), the peak time (1.7 +/- 0.2 h in the liver and 1.9 +/- 0.2 h in the spleen), and the disposition half-life of the dextran-coated magnetite nanoparticles in mice organs (t 1/2 = 70 +/- 10 h in the liver and t 1/2 = 32 +/- 7 h in the spleen) were assessed. In addition, light and electron microscopy showed several aspects that may be related to the iron metabolism. Microscopic analysis also revealed that although magnetite nanoparticles or iron released from them are retained in the organism for a long period of time, no morphologic alteration is induced by the intravenous administration of the magnetic fluid sample, evidencing its biocompatibility. The used tests may represent an adequate methodology for nanotoxicology evaluation.
ISSN:1550-7033
DOI:10.1166/jbn.2012.1376