Biocompatible dextran-coated gadolinium-doped cerium oxide nanoparticles as MRI contrast agents with high T1 relaxivity and selective cytotoxicity to cancer cells
| Autor: | N.R. Popova, D. D. Kolmanovich, Alexander E. Baranchikov, Artem M. Ermakov, Vladimir Ivanov, A.L. Popov, Olga S. Ivanova, I. V. Savintseva, Maxim A. Abakumov |
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| Rok vydání: | 2021 |
| Předmět: |
Cerium oxide
medicine.diagnostic_test Chemistry Gadolinium Biomedical Engineering chemistry.chemical_element Nanoparticle Magnetic resonance imaging General Chemistry General Medicine medicine.disease chemistry.chemical_compound Cerium Nuclear magnetic resonance Dextran Fibrosis Cancer cell medicine General Materials Science |
| Zdroj: | Journal of Materials Chemistry B. 9:6586-6599 |
| ISSN: | 2050-7518 2050-750X |
| DOI: | 10.1039/d1tb01147b |
| Popis: | Gd-based complexes are widely used as magnetic resonance imaging (MRI) contrast agents. The safety of previously approved contrast agents is questionable and is being re-assessed. The main causes of concern are possible gadolinium deposition in the brain and the development of systemic nephrogenic fibrosis after repeated use of MRI contrasts. Thus, there is an urgent need to develop a new generation of MRI contrasts that are safe and that have high selectivity in tissue accumulation with improved local contrast. Here, we report on a new type of theranostic MRI contrast, namely dextran stabilised, gadolinium doped cerium dioxide nanoparticles. These ultra-small (4–6 nm) Ce0.9Gd0.1O1.95 nanoparticles have been shown to possess excellent colloidal stability and high r1-relaxivity (3.6 mM−1 s−1). They are effectively internalised by human normal and cancer cells and demonstrate dose-dependent selective cytotoxicity to cancer cells. |
| Databáze: | OpenAIRE |
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