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Induced pluripotent mesenchymal stromal cell clones retain donor-derived differences in DNA methylation profiles

Shao, K., Koch, C., Gupta, M.K., Lin, Q., Lenz, M., Laufs, S., Denecke, B., Schmidt, M., Linke, M., Hennies, Hans C., Hescheler, J., Zenke, M., Zechner, U., Saric, T. and Wagner, W. (2013) Induced pluripotent mesenchymal stromal cell clones retain donor-derived differences in DNA methylation profiles. Molecular Therapy—Nucleic Acids, 21 (1). pp. 240-250. ISSN 2162-2531

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Abstract

Reprogramming of somatic cells into induced pluripotent stem cells (iPSCs) is an epigenetic phenomenon. It has been suggested that iPSC retain some tissue-specific memory whereas little is known about interindividual epigenetic variation. We have reprogrammed mesenchymal stromal cells from human bone marrow (iP-MSC) and compared their DNA methylation profiles with initial MSC and embryonic stem cells (ESCs) using high-density DNA methylation arrays covering more than 450,000 CpG sites. Overall, DNA methylation patterns of iP-MSC and ESC were similar whereas some CpG sites revealed highly significant differences, which were not related to parental MSC. Furthermore, hypermethylation in iP-MSC versus ESC occurred preferentially outside of CpG islands and was enriched in genes involved in epidermal differentiation indicating that these differences are not due to random de novo methylation. Subsequently, we searched for CpG sites with donor-specific variation. These "epigenetic fingerprints" were highly enriched in non-promoter regions and outside of CpG islands-and they were maintained upon reprogramming. In conclusion, iP-MSC clones revealed relatively little intraindividual variation but they maintained donor-derived epigenetic differences. In the absence of isogenic controls, it would therefore be more appropriate to compare iPSC from different donors rather than a high number of different clones from the same patient.

Item Type: Article
Additional Information: Unmapped bibliographic data: ST - Induced pluripotent mesenchymal stromal cell clones retain donor-derived differences in DNA methylation profiles [Field not mapped to EPrints] C2 - PMC3538313 [Field not mapped to EPrints] AD - Institute for Neurophysiology, Medical Center, University of Cologne, Cologne, Germany. [Field not mapped to EPrints] AN - 23032973 [Field not mapped to EPrints]
Uncontrolled Keywords: *Clone Cells
Subjects: Q Science > QH Natural history > QH301 Biology
Q Science > QH Natural history > QH426 Genetics
Schools: School of Applied Sciences
Depositing User: Hans Hennies
Date Deposited: 06 Jul 2016 14:45
Last Modified: 29 Jul 2016 13:07
URI: http://eprints.hud.ac.uk/id/eprint/28765

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