A simple and widely applicable method to 59Fe-radiolabel monodisperse superparamagnetic iron oxide nanoparticles for in vivo quantification studies.
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A simple and widely applicable method to 59Fe-radiolabel monodisperse superparamagnetic iron oxide nanoparticles for in vivo quantification studies. / Freund, Barbara; Tromsdorf, Ulrich I; Bruns, Oliver T; Heine, Markus; Giemsa, Artur; Bartelt, Alexander; Salmen, Sunhild C; Raabe, Nina; Heeren, Jörg; Ittrich, Harald; Reimer, Rudolph; Hohenberg, Heinrich; Schumacher, Udo; Weller, Horst; Nielsen, Peter.
in: ACS NANO, Jahrgang 6, Nr. 8, 8, 2012, S. 7318-7325.Publikationen: SCORING: Beitrag in Fachzeitschrift/Zeitung › SCORING: Zeitschriftenaufsatz › Forschung › Begutachtung
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TY - JOUR
T1 - A simple and widely applicable method to 59Fe-radiolabel monodisperse superparamagnetic iron oxide nanoparticles for in vivo quantification studies.
AU - Freund, Barbara
AU - Tromsdorf, Ulrich I
AU - Bruns, Oliver T
AU - Heine, Markus
AU - Giemsa, Artur
AU - Bartelt, Alexander
AU - Salmen, Sunhild C
AU - Raabe, Nina
AU - Heeren, Jörg
AU - Ittrich, Harald
AU - Reimer, Rudolph
AU - Hohenberg, Heinrich
AU - Schumacher, Udo
AU - Weller, Horst
AU - Nielsen, Peter
PY - 2012
Y1 - 2012
N2 - A simple, fast, efficient, and widely applicable method to radiolabel the cores of monodisperse superparamagnetic iron oxide nanoparticles (SPIOs) with (59)Fe was developed. These cores can be used as precursors for a variety of functionalized nanodevices. A quality control using filtration techniques, size-exclusion chromatography, chemical degradation methods, transmission electron microscopy, and magnetic resonance imaging showed that the nanoparticles were stably labeled with (59)Fe. Furthermore, the particle structure and the magnetic properties of the SPIOs were unchanged. In a second approach, monodisperse SPIOs stabilized with (14)C-oleic acid were synthesized, and the stability of this shell labeling was studied. In proof of principle experiments, the (59)Fe-SPIOs coated with different shells to make them water-soluble were used to evaluate and compare in vivo pharmacokinetic parameters such as blood half-life. It could also be shown that our radiolabeled SPIOs embedded in recombinant lipoproteins can be used to quantify physiological processes in closer detail than hitherto possible. In vitro and in vivo experiments showed that the (59)Fe label is stable enough to be applied in vivo, whereas the (14)C label is rapidly removed from the iron core and is not adequate for in vivo studies. To obtain meaningful results in in vivo experiments, only (59)Fe-labeled SPIOs should be used.
AB - A simple, fast, efficient, and widely applicable method to radiolabel the cores of monodisperse superparamagnetic iron oxide nanoparticles (SPIOs) with (59)Fe was developed. These cores can be used as precursors for a variety of functionalized nanodevices. A quality control using filtration techniques, size-exclusion chromatography, chemical degradation methods, transmission electron microscopy, and magnetic resonance imaging showed that the nanoparticles were stably labeled with (59)Fe. Furthermore, the particle structure and the magnetic properties of the SPIOs were unchanged. In a second approach, monodisperse SPIOs stabilized with (14)C-oleic acid were synthesized, and the stability of this shell labeling was studied. In proof of principle experiments, the (59)Fe-SPIOs coated with different shells to make them water-soluble were used to evaluate and compare in vivo pharmacokinetic parameters such as blood half-life. It could also be shown that our radiolabeled SPIOs embedded in recombinant lipoproteins can be used to quantify physiological processes in closer detail than hitherto possible. In vitro and in vivo experiments showed that the (59)Fe label is stable enough to be applied in vivo, whereas the (14)C label is rapidly removed from the iron core and is not adequate for in vivo studies. To obtain meaningful results in in vivo experiments, only (59)Fe-labeled SPIOs should be used.
KW - Animals
KW - Mice
KW - Mice, Inbred BALB C
KW - Contrast Media
KW - Tissue Distribution
KW - Organ Specificity
KW - Magnetic Resonance Imaging/methods
KW - Dextrans/chemistry/diagnostic use
KW - Iron Radioisotopes/chemistry/diagnostic use
KW - Magnetite Nanoparticles/chemistry/diagnostic use
KW - Radiopharmaceuticals
KW - Whole Body Imaging/methods
KW - Animals
KW - Mice
KW - Mice, Inbred BALB C
KW - Contrast Media
KW - Tissue Distribution
KW - Organ Specificity
KW - Magnetic Resonance Imaging/methods
KW - Dextrans/chemistry/diagnostic use
KW - Iron Radioisotopes/chemistry/diagnostic use
KW - Magnetite Nanoparticles/chemistry/diagnostic use
KW - Radiopharmaceuticals
KW - Whole Body Imaging/methods
M3 - SCORING: Journal article
VL - 6
SP - 7318
EP - 7325
JO - ACS NANO
JF - ACS NANO
SN - 1936-0851
IS - 8
M1 - 8
ER -
