Medizinische Universität Graz Austria/Österreich - Forschungsportal - Medical University of Graz
Gewählte Publikation:
SHR Neuro Krebs Kardio Lipid Stoffw Microb
Weidner, CI; Walenda, T; Lin, Q; Wölfler, MM; Denecke, B; Costa, IG; Zenke, M; Wagner, W.
Hematopoietic stem and progenitor cells acquire distinct DNA-hypermethylation during in vitro culture.
Sci Rep. 2013; 3(12):3372-3372
Doi: 10.1038/srep03372
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- Co-Autor*innen der Med Uni Graz
- Wölfler Monika Martina
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- Abstract:
- Hematopoietic stem and progenitor cells (HPCs) can be maintained in vitro, but the vast majority of their progeny loses stemness during culture. In this study, we compared DNA-methylation (DNAm) profiles of freshly isolated and culture-expanded HPCs. Culture conditions of CD34(+) cells - either with or without mesenchymal stromal cells (MSCs) - had relatively little impact on DNAm, although proliferation is greatly increased by stromal support. However, all cultured HPCs - even those which remained CD34(+) - acquired significant DNA-hypermethylation. DNA-hypermethylation occurred particularly in up-stream promoter regions, shore-regions of CpG islands, binding sites for PU.1, HOXA5 and RUNX1, and it was reflected in differential gene expression and variant transcripts of DNMT3A. Low concentrations of DNAm inhibitors slightly increased the frequency of colony-forming unit initiating cells. Our results demonstrate that HPCs acquire DNA-hypermethylation at specific sites in the genome which is relevant for the rapid loss of stemness during in vitro manipulation.
- Find related publications in this database (using NLM MeSH Indexing)
- Antigens, CD34 - genetics
- Cell Differentiation - genetics
- Cells, Cultured -
- Coculture Techniques - methods
- CpG Islands - genetics
- DNA - genetics
- DNA Methylation - genetics
- Fetal Blood - cytology
- Hematopoietic Stem Cells - cytology
- Humans -
- In Vitro Techniques - methods
- Mesenchymal Stromal Cells - cytology
- Promoter Regions, Genetic - genetics
- Stem Cells - cytology