Document Detail


Electron paramagnetic resonance as a sensitive tool to assess the iron oxide content in cells for MRI cell labeling studies.
MedLine Citation:
PMID:  22539400     Owner:  NLM     Status:  In-Data-Review    
Abstract/OtherAbstract:
MRI cell tracking is a promising technique to track various cell types (stem cells, tumor cells, etc.) in living animals. Usually, cells are incubated with iron oxides (T(2) contrast agent) in order to take up the particles before being injected in vivo. Iron oxide quantification is important in such studies for validating the labeling protocols and assessing the dilution of the particles with cell proliferation. We here propose to implement electron paramagnetic resonance (EPR) as a very sensitive method to quantify iron oxide concentration in cells. Iron oxide particles exhibit a unique EPR spectrum, which directly reflects the number of particles in a sample. In order to compare EPR with existing methods (Perls's Prussian blue reaction, ICP-MS and fluorimetry), we labeled tumor cells (melanoma and renal adenocarcinoma cell lines) and fibroblasts with fluorescent iron oxide particles, and determined the limits of detection of the different techniques. We show that EPR is a very sensitive technique and is specific for iron oxide quantification as measurements are not affected by endogenous iron. As a consequence, EPR is well adapted to perform ex vivo analysis of tissues after cell tracking experiments in order to confirm MRI results. Copyright © 2012 John Wiley & Sons, Ltd.
Authors:
P Danhier; G De Preter; S Boutry; I Mahieu; P Leveque; J Magat; V Haufroid; P Sonveaux; C Bouzin; O Feron; R N Muller; B F Jordan; B Gallez
Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Contrast media & molecular imaging     Volume:  7     ISSN:  1555-4317     ISO Abbreviation:  Contrast Media Mol Imaging     Publication Date:  2012 May 
Date Detail:
Created Date:  2012-04-27     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101286760     Medline TA:  Contrast Media Mol Imaging     Country:  United States    
Other Details:
Languages:  eng     Pagination:  302-7     Citation Subset:  IM    
Copyright Information:
Copyright © 2012 John Wiley & Sons, Ltd.
Affiliation:
Louvain Drug Research Institute, Biomedical Magnetic Resonance Research Group, Université Catholique de Louvain, Brussels, Belgium.
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