Effect of External Magnetic Field on IV 99mTc-Labeled Aminosilane-Coated Iron Oxide Nanoparticles: Demonstration in a Rat Model. (February 2015)

• Record Type: Journal Article
• Authors: Liberatore, Mauro; Barteri, Mario; Megna, Valentina; D'Elia, Piera; Rebonato, Stefania; Latini, Augusto; De Angelis, Francesca; Scaramuzzo, Francesca Anna; De Stefano, Maria Egle; Guadagno, Noemi Antonella; Chondrogiannis, Sotirios; Maffione, Anna Margherita; Rubello, Domenico; Pala, Alessandro; Colletti, Patrick M.
• Is Part Of: Clinical nuclear medicine. Volume 40:Number 2(2015)
• Publication Date: 2015-02
• Subjects: ferromagnetic nanoparticles -- 99mTc-labeled aminosilane-coated iron oxide nanoparticles -- magnetic-directed nanoparticles -- animal model -- theranostics; Nuclear medicine -- Periodicals; Radioisotope scanning -- Periodicals; Nuclear Medicine -- Periodicals; 616.07575
• DOI: 10.1097/RLU.0000000000000672
• Languages: English
• ISSNs: 0363-9762

Abstract

Abstract : Abstract: Among the most interesting applications of ferromagnetic nanoparticles (NPs) in medicine is the potential for localizing pharmacologically or radioactively tagged agents directly to selected tissues selected by an adjustable external magnetic field. This concept is demonstrated by the application external magnetic field on IV 99m Tc-labeled aminosilane-coated iron oxide NPs in a rat model. In a model comparing a rat with a 0.3-T magnet over a hind paw versus a rat without a magnet, a static acquisition at 45 minutes showed that 27% of the administered radioactivity was in the area subtended by the magnet, whereas the liver displays a percentage of binding of 14% in the presence of the magnet and of 16% in the absence of an external magnetic field. These preliminary results suggest that the application of an external magnetic field may be a viable route for the development of methods for the confinement of magnetic NPs labeled with radioactive isotopes targeted for predetermined sites of the body.