Tissue distribution and urinary excretion of intravenously administered chemically functionalized graphene oxide sheets.
Fiche publication
Date publication
juillet 2015
Journal
Chemical science
Auteurs
Membres identifiés du Cancéropôle Est :
Dr MENARD-MOYON Cécilia, Dr BIANCO Alberto
Tous les auteurs :
Jasim DA, Ménard-Moyon C, Bégin D, Bianco A, Kostarelos K
Lien Pubmed
Résumé
The design of graphene-based materials for biomedical purposes is of great interest. Graphene oxide (GO) sheets represent the most widespread type of graphene materials in biological investigations. In this work, thin GO sheets were synthesized and further chemically functionalized with DOTA (1,4,7,10-tetraazacyclododecane-1,4,7,10-tetraacetic acid), a stable radiometal chelating agent, by an epoxide opening reaction. We report the tissue distribution of the functionalized GO sheets labeled with radioactive indium (In) after intravenous administration in mice. Whole body single photon emission computed tomography (SPECT/CT) imaging, gamma counting studies, Raman microscopy and histological investigations indicated extensive urinary excretion and predominantly spleen accumulation. Intact GO sheets were detected in the urine of injected mice by Raman spectroscopy, high resolution transmission electron microscopy (HR-TEM) and electron diffraction. These results offer a previously unavailable pharmacological understanding on how chemically functionalized GO sheets transport in the blood stream and interact with physiological barriers that will determine their body excretion and tissue accumulation.
Référence
Chem Sci. 2015 Jul 15;6(7):3952-3964