Articles articles

service

Your Position:Home > Articles > Silica-Coated Manganese Oxide Nanoparticles as a Platform for Targeted Magnetic Resonance and Fluorescence Imaging of Cancer Cells

Hot Articles1

Hot Products1

Silica-Coated Manganese Oxide Nanoparticles as a Platform for Targeted Magnetic Resonance and Fluorescence Imaging of Cancer Cells

Silica-Coated Manganese Oxide Nanoparticles as a Platform for Targeted Magnetic Resonance and Fluorescence Imaging of Cancer Cells


Abstract


Monodisperse silica-coated manganese oxide nanoparticles (NPs) with a diameter of 35 nm are synthesized and are aminated through silanization. The amine-functionalized core–shell NPs enable the covalent conjugation of a fluorescent dye, Rhodamine B isothiocyanate (RBITC), and folate (FA) onto their surface. The formed Mn3O4@SiO2(RBITC)–FA core–shell nanocomposites are water-dispersible, stable, and biocompatible when the Mn concentration is below 50mg mL 1 as confirmed by a cytotoxicity assay. Relaxivity measurements show that the core–shell NPs have a T1 relaxivity (r1) of 0.50mM 1 s 1 on the 0.5 T scanner and 0.47mM 1 s 1 on the 3.0 T scanner, suggesting the possibility of using the particles as a T1 contrast agent. Combined flow cytometry, confocal microscopy, and magnetic resonance imaging studies show that the Mn3O4@SiO2(RBITC)–FA nanocomposites can specifically target cancer cells overexpressing FA receptors (FARs). Findings from this study suggest that the silica-coated Mn3O4 core–shell NPs could be used as a platform for bimodal imaging (both magnetic resonance and fluorescence) in various biological systems.

Recommended instruments for related researches



PQ001 NMR Relaxometry


NMI20 MRI Contrast Agent Analyzer


Mobile:+86-15618809683 | Email: info@niumag.com |Skype: niumagnmr