Abstract：
:The in vitro labelling of cultured cells with iron oxide nanoparticles (NPs) is a frequent practice in biomedical research. To date, the potential cytotoxicity of these particles remains an issue of debate. In the present study, 4 different NP types (dextran-coated Endorem, carboxydextran-coated Resovist, lipid-coated magnetoliposomes (MLs) and citrate-coated very small iron oxide particles (VSOP)) are tested on a variety of cell types, being C17.2 neural progenitor cells, PC12 rat pheochromocytoma cells and human blood outgrowth endothelial cells. Using different NP concentrations, the effect of the NPs on cell morphology, cytoskeleton, proliferation, reactive oxygen species, functionality, viability and cellular homeostasis is investigated. Through a systematic study, the safe concentrations for every particle type are determined, showing that MLs can lead up to 67.37 ± 5.98 pg Fe/cell whereas VSOP are the most toxic particles and only reach 18.65 ± 2.07 pg Fe/cell. Using these concentrations, it is shown that for MRI up to 500 cells/μl labelled with VSOP are required to efficiently visualize in an agar phantom in contrast to only 50 cells/μl for MLs and 200 cells/μl for Endorem and Resovist. These results highlight the importance of in-depth cytotoxic evaluation of cell labelling studies as at non-toxic concentrations, some particles appear to be less suitable for the MR visualization of labelled cells.
journal_name
Biomaterialsjournal_title
Biomaterialsauthors
Soenen SJ,Himmelreich U,Nuytten N,De Cuyper Mdoi
10.1016/j.biomaterials.2010.08.075subject
Has Abstractpub_date
2011-01-01 00:00:00pages
195-205issue
1eissn
0142-9612issn
1878-5905pii
S0142-9612(10)01113-0journal_volume
32pub_type
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