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Effects of Iron Chelators, Iron Salts, and Iron Oxide Nanoparticles on the Proliferation and the Iron Content of Oligodendroglial OLN-93 Cells

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Abstract

The oligodendroglial cell line OLN-93 was used as model system to investigate the consequences of iron deprivation or iron excess on cell proliferation. Presence of ferric or ferrous iron chelators inhibited the proliferation of OLN-93 cells in a time and concentration dependent manner, while the application of a molar excess of ferric ammonium citrate (FAC) prevented the inhibition of proliferation by the chelator deferoxamine. Proliferation of OLN-93 cells was not affected by incubation with 300 μM iron that was applied in the form of FAC, FeCl2, ferrous ammonium sulfate or iron oxide nanoparticles, although the cells efficiently accumulated iron during exposure to each of these iron sources. The highest specific iron content was observed for cells that were exposed to the nanoparticles. These data demonstrate that the proliferation of OLN-93 cells depends strongly on the availability of iron and that these cells efficiently accumulate iron from various extracellular iron sources.

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Acknowledgments

Michaela Hohnholt and Mark Geppert are members of the Ph.D. graduate school nanoToxCom at the University of Bremen. Michaela Hohnholt is financially supported by a grant from the University Bremen (BFK) and Mark Geppert is a recipient of a Ph.D. fellowship from the Hans-Böckler Stiftung. We like to thank Prof. C. Richter-Landsberg (Oldenburg, Germany) for kindly providing us with OLN-93 cells and Maike Schmidt for her help with the microscopy.

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Authors and Affiliations

  1. Center for Biomolecular Interactions Bremen, University of Bremen, P.O. Box 330440, 28334, Bremen, Germany

    Michaela Hohnholt, Mark Geppert & Ralf Dringen

  2. Center for Environmental Research and Sustainable Technology, University of Bremen, Bremen, Germany

    Michaela Hohnholt, Mark Geppert & Ralf Dringen

  3. School of Psychology and Psychiatry, Monash University, Clayton, VIC, Australia

    Ralf Dringen

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  1. Michaela Hohnholt
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Correspondence to Ralf Dringen.

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Hohnholt, M., Geppert, M. & Dringen, R. Effects of Iron Chelators, Iron Salts, and Iron Oxide Nanoparticles on the Proliferation and the Iron Content of Oligodendroglial OLN-93 Cells. Neurochem Res 35, 1259–1268 (2010). https://doi.org/10.1007/s11064-010-0184-5

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