Live imaging is a powerful technique that can be used to characterize the fate and location of stem cells in animal models. Here we investigated the characteristics and in vitro cytotoxicity of human mesenchymal stem cells (MSCs) labeled with silica-coated magnetic nanoparticles incorporating rhodamine B isothiocyanate, MNPs@SiO2(RITC). We also conducted various in vivo-uptake tests with nanoparticle-labeled human MSCs. MNPs@SiO2(RITC) showed photostability against ultraviolet light exposure and were nontoxic to human MSCs, based on the MTT, apoptosis, and cell cycle arrest assays. In addition, MNPs@SiO2(RITC) did not affect the surface phenotype or morphology of human MSCs. We also demonstrated that MNPs@SiO2(RITC) have stable retention properties in MSCs in vitro. Furthermore, using optical and magnetic resonance imaging, we successfully detected a visible signal from labeled human MSCs that were transplanted into NOD.CB17-PrkdcSCID (NOD-SCID) mice. These results demonstrate that MNPs@SiO2(RITC) are biocompatible and useful tools for human MSC labeling and bioimaging. From the Clinical Editor: The characteristics and in vitro cytotoxicity of human mesenchymal stem cells (MSCs) labeled with silica-coated magnetic nanoparticles incorporating rhodamine B isothiocyanate, RITC were investigated in this study. RITC showed photostability against ultraviolet light exposure and was nontoxic to human MSCs. Using both optical and magnetic resonance imaging, successful detection of signal from labeled human MSCs transplanted into mice is demonstrated.
|Number of pages||14|
|Journal||Nanomedicine: Nanotechnology, Biology, and Medicine|
|Publication status||Published - 2010 Apr|
Bibliographical noteFunding Information:
This research was supported by grants from the IN-SUNG Foundation for Medical Research, Seoul, South Korea.
All Science Journal Classification (ASJC) codes
- Medicine (miscellaneous)
- Molecular Medicine
- Biomedical Engineering
- Materials Science(all)
- Pharmaceutical Science