Please use this identifier to cite or link to this item: http://scholarbank.nus.edu.sg/handle/10635/25573
Title: The use of microgel iron oxide nanoparticles in studies of magnetic resonance relaxation and endothelial progenitor cell labelling
Authors: Lee, E.S.M.
Shuter, B. 
Wang, S.-C. 
Chan, J.
Chong, M.S.K.
Choolani, M. 
Ding, J. 
Teoh, S.-H. 
Beuf, O.
Briguet, A.
Tam, K.C.
Keywords: Endothelial progenitor cells
Magnetism
Modelling
MRI
Nanoparticles
Issue Date: 2010
Citation: Lee, E.S.M., Shuter, B., Wang, S.-C., Chan, J., Chong, M.S.K., Choolani, M., Ding, J., Teoh, S.-H., Beuf, O., Briguet, A., Tam, K.C. (2010). The use of microgel iron oxide nanoparticles in studies of magnetic resonance relaxation and endothelial progenitor cell labelling. Biomaterials 31 (12) : 3296-3306. ScholarBank@NUS Repository.
Abstract: In vivo tracking of stem cells after transplantation is crucial for understanding cell-fate and therapeutic efficacy. By labelling stem cells with magnetic particles, they can be tracked by Magnetic Resonance Imaging (MRI). We previously demonstrated that microgel iron oxide nanoparticle (MGIO) provide superior tracking sensitivity over commercially available particles. Here, we describe the synthesis of MGIO and report on their morphology, hydrodynamic diameters (87-766 nm), iron oxide weight content (up to 82%) and magnetization characteristics (Ms = 52.9 Am2/kg, MR = 0.061 Am2/kg and Hc = 0.672 A/m). Their MR relaxation characteristics are comparable to those of theoretical models and represent the first such correlation between model and real particles of varying diameters. A labelling study of primary endothelial progenitor cells also confirms that MGIO is an efficient label regardless of cell type. The facile synthesis of MGIO makes it a useful tool for the studying of relaxation induced by magnetic particles and cellular tracking by MRI. © 2010 Elsevier Ltd. All rights reserved.
Source Title: Biomaterials
URI: http://scholarbank.nus.edu.sg/handle/10635/25573
ISSN: 01429612
Appears in Collections:Staff Publications

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