Amine-surface-modified superparamagnetic iron oxide nanoparticles interfere with differentiation of human mesenchymal stem cells

Journal of Orthopaedic Research : Official Publication of the Orthopaedic Research Society
You-Kang ChangOscar K Lee

Abstract

Superparamagnetic iron oxide (SPIO) nanoparticles have been widely used for stem cell labeling and tracking. Surface modification has been known to improve biocompatibility, biodistribution, and labeling efficiency of SPIO nanoparticles. However, the effects of amine (NH 3+)-surface-modified SPIO nanoparticles on proliferation and differentiation of human mesenchymal stem cells (hMSCs) remain unclear. The purpose of this study is to investigate how amine-surface-modified SPIO nanoparticles affected hMSCs. In this study, intracellular uptake and the contiguous presence of amine-surface-modified SPIO nanoparticles in hMSCs were demonstrated by Prussian blue staining, transmission electron microscopy and magnetic resonance imaging. Moreover, accelerated cell proliferation was found to be associated with cellular internalization of amine-surface-modified SPIO nanoparticles. The osteogenic and chondrogenic differentiation potentials of hMSCs were impaired after treating with SPIO, while adipogenic potential was relatively unaffected. Altered cytokine production profile in hMSCs caused by amine-surface-modified SPIO nanoparticles may account for the increased proliferation and impaired differentiation potentials; concentrations of th...Continue Reading

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