title: Dendronized iron oxide nanoparticles for multimodal imaging.
abstract: The synthesis of small-size dendrons and their grafting at the surface of iron oxide nanoparticles were achieved with the double objective to obtain a good colloidal stability with a mean hydrodynamic diameter smaller than 100 nm and to ensure the possibility of tuning the organic coating characteristics including morphology, functionalities, physico-chemical properties, grafting of fluorescent or targeting molecules. Magnetic resonance and fluorescence imaging are then demonstrated to be simultaneously possible using such versatile superparamagnetic iron oxide nanocrystals covered by a dendritic shell displaying either carboxylate or ammonium groups at their periphery which could be further labelled with a fluorescent dye. The grafting conditions of these functionalized dendrons at the surface of SPIO NPs synthesized by co-precipitation have been optimized as a function of the nature of the peripheral functional group. The colloidal stability has been investigated in water and osmolar media, and in vitro and in vivo MRI and optical imaging measurements have been performed showing encouraging biodistribution.
authors.affiliation: IPCMS, UMR CNRS-Université de Strasbourg 7504, 23 rue du loess, BP 43, 67034 Strasbourg cedex 2, France.
authors.forename: Giuseppe
authors.initials: G
authors.lastname: Lamanna
authors.forename: Marie
authors.initials: M
authors.lastname: Kueny-Stotz
authors.forename: Hind
authors.initials: H
authors.lastname: Mamlouk-Chaouachi
authors.forename: Cynthia
authors.initials: C
authors.lastname: Ghobril
authors.forename: Brice
authors.initials: B
authors.lastname: Basly
authors.forename: Annabelle
authors.initials: A
authors.lastname: Bertin
authors.forename: Imen
authors.initials: I
authors.lastname: Miladi
authors.forename: Claire
authors.initials: C
authors.lastname: Billotey
authors.forename: Geneviève
authors.initials: G
authors.lastname: Pourroy
authors.forename: Sylvie
authors.initials: S
authors.lastname: Begin-Colin
authors.forename: Delphine
authors.initials: D
authors.lastname: Felder-Flesch
mesh_terms: D000818:Animals; D003102:Colloids; D003460:Crystallization; D050091:Dendrimers; D005290:Ferric Compounds / Q000737:chemistry*; D005456:Fluorescent Dyes / Q000737:chemistry; D009682:Magnetic Resonance Spectroscopy; D053758:Nanoparticles; D019032:Spectrometry, Mass, Matrix-Assisted Laser Desorption-Ionization; D013055:Spectrophotometry, Infrared
chemical_list: D003102:Colloids; D050091:Dendrimers; D005290:Ferric Compounds; D005456:Fluorescent Dyes; C000499:ferric oxide