| Gene expression profiling reveals early cellular responses to intracellular magnetic labeling with superparamagnetic iron oxide nanoparticles. | |
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MedLine Citation:
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PMID: 20373404 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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With MRI (stem) cell tracking having entered the clinic, studies on the cellular genomic response toward labeling are warranted. Gene expression profiling was applied to C17.2 neural stem cells following superparamagnetic iron oxide/PLL (poly-L-lysine) labeling over the course of 1 week. Relative to unlabeled cells, less than 1% of genes (49 total) exhibited greater than 2-fold difference in expression in response to superparamagnetic iron oxide/PLL labeling. In particular, transferrin receptor 1 (Tfrc) and heme oxygenase 1 (Hmox1) expression was downregulated early, whereas genes involved in lysosomal function (Sulf1) and detoxification (Clu, Cp, Gstm2, Mgst1) were upregulated at later time points. Relative to cells treated with PLL only, cells labeled with superparamagnetic iron oxide/PLL complexes exhibited differential expression of 1399 genes. Though these differentially expressed genes exhibited altered expression over time, the overall extent was limited. Gene ontology analysis of differentially expressed genes showed that genes encoding zinc-binding proteins are enriched after superparamagnetic iron oxide/PLL labeling relative to PLL only treatment, whereas members of the apoptosis/programmed cell death pathway did not display increased expression. Overexpression of the differentially expressed genes Rnf138 and Abcc4 were confirmed by quantitative real-time polymerase chain reaction. These results demonstrate that, although early reactions responsible for iron homeostasis are induced, overall neural stem cell gene expression remains largely unaltered following superparamagnetic iron oxide/PLL labeling. |
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Authors:
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Dorota A Kedziorek; Naser Muja; Piotr Walczak; Jesus Ruiz-Cabello; Assaf A Gilad; Chunfa C Jie; Jeff W M Bulte |
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Publication Detail:
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Type: Journal Article; Research Support, N.I.H., Extramural; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: Magnetic resonance in medicine : official journal of the Society of Magnetic Resonance in Medicine / Society of Magnetic Resonance in Medicine Volume: 63 ISSN: 1522-2594 ISO Abbreviation: Magn Reson Med Publication Date: 2010 Apr |
Date Detail:
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Created Date: 2010-04-07 Completed Date: 2010-07-15 Revised Date: 2011-04-21 |
Medline Journal Info:
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Nlm Unique ID: 8505245 Medline TA: Magn Reson Med Country: United States |
Other Details:
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Languages: eng Pagination: 1031-43 Citation Subset: IM |
Affiliation:
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Russell H. Morgan Department of Radiology and Radiological Science, Division of MR Research, The Johns Hopkins University School of Medicine, Baltimore, Maryland, USA. |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Algorithms Animals Contrast Media / chemistry* Dextrans Ferrosoferric Oxide / chemistry* Gene Expression Profiling* Lysine / chemistry Magnetic Resonance Imaging / methods* Magnetite Nanoparticles Mesenchymal Stem Cells / drug effects*, metabolism Mice RNA / analysis Reverse Transcriptase Polymerase Chain Reaction |
| Grant Support | |
ID/Acronym/Agency:
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2R01 NS045062/NS/NINDS NIH HHS; R01 NS045062-03/NS/NINDS NIH HHS; R01 NS045062-04/NS/NINDS NIH HHS; R01 NS045062-05/NS/NINDS NIH HHS; R01 NS045062-06A2/NS/NINDS NIH HHS |
| Chemical | |
Reg. No./Substance:
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0/Contrast Media; 0/Magnetite Nanoparticles; 119683-68-0/ferumoxides; 1317-61-9/Ferrosoferric Oxide; 56-87-1/Lysine; 63231-63-0/RNA; 9004-54-0/Dextrans |
| Comments/Corrections | |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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