Document Detail

Treatment with iron oxide nanoparticles induces ferritin synthesis but not oxidative stress in oligodendroglial cells.
MedLine Citation:
PMID:  21763792     Owner:  NLM     Status:  Publisher    
Magnetic iron oxide nanoparticles (IONPs) have been used for a variety of neurobiological applications, although little is yet known as to the fate of such particles in brain cells. To address these questions, we have exposed oligodendroglial OLN-93 cells to dimercaptosuccinate-coated IONPs. Treatment of the cells strongly increased the specific cellular iron content proportional to the IONP concentrations applied (0-1000μM total iron as IONPs) up to 300-fold, but did not cause any acute cytotoxicity or induce oxidative stress. To investigate the potential of OLN-93 cells to liberate iron from the accumulated IONPs, we have studied the upregulation of the iron storage protein ferritin and the cell proliferation as cellular processes that depend on the availability of low-molecular-weight iron. The presence of IONPs caused a concentration-dependent increase in the amount of cellular ferritin and partially bypassed the inhibition of cell proliferation by the iron chelator deferoxamine. These data demonstrate that viable OLN-93 cells efficiently take up IONPs and suggest that these cells are able to use iron liberated from accumulated IONPs for their metabolism.
Michaela C Hohnholt; Mark Geppert; Ralf Dringen
Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2011-7-2
Journal Detail:
Title:  Acta biomaterialia     Volume:  -     ISSN:  1878-7568     ISO Abbreviation:  -     Publication Date:  2011 Jul 
Date Detail:
Created Date:  2011-7-18     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101233144     Medline TA:  Acta Biomater     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Copyright Information:
Copyright © 2011 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
Centre for Biomolecular Interactions Bremen, University of Bremen, P.O. Box 330440, D-28334 Bremen, Germany; Centre for Environmental Research and Sustainable Technology, Leobener Straße, D-28359 Bremen, Germany.
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