Abstract:
:Due to the increasing use of nanometric cerium oxide in applications, concerns about the toxicity of these particles have been raised and have resulted in a large number of studies. We report here on the interactions between 7 nm anionically charged cerium oxide particles and living mammalian cells. By a modification of the particle coating including low-molecular weight ligands and polymers, two generic behaviours are compared: particles coated with citrate ions that precipitate in biofluids and particles coated with poly(acrylic acid) that are stable and remain nanometric. We find that nanoceria covered with both coating agents are taken up by mouse fibroblasts and localized into membrane-bound compartments. However, flow cytometry and electron microscopy reveal that as a result of their precipitation, citrate-coated particles interact more strongly with cells. At cerium concentration above 1 mM, only citrate-coated nanoceria (and not particles coated with poly(acrylic acid)) display toxicity and moderate genotoxicity. The results demonstrate that the control of the surface chemistry of the particles and its ability to prevent aggregation can affect the toxicity of nanomaterials.
journal_name
Nanotoxicologyjournal_title
Nanotoxicologyauthors
Ould-Moussa N,Safi M,Guedeau-Boudeville MA,Montero D,Conjeaud H,Berret JFdoi
10.3109/17435390.2013.831501subject
Has Abstractpub_date
2014-11-01 00:00:00pages
799-811issue
7eissn
1743-5390issn
1743-5404journal_volume
8pub_type
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