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PRC2 inhibition counteracts the culture-associated loss of engraftment potential of human cord blood-derived hematopoietic stem and progenitor cells

Please always quote using this URN: urn:nbn:de:bvb:20-opus-148374
  • Cord blood hematopoietic stem cells (CB-HSCs) are an outstanding source for transplantation approaches. However, the amount of cells per donor is limited and culture expansion of CB-HSCs is accompanied by a loss of engraftment potential. In order to analyze the molecular mechanisms leading to this impaired potential we profiled global and local epigenotypes during the expansion of human CB hematopoietic stem and progenitor cells (HPSCs). Human CB-derived CD34+ cells were cultured in serum-free medium together with SCF, TPO, FGF, with or withoutCord blood hematopoietic stem cells (CB-HSCs) are an outstanding source for transplantation approaches. However, the amount of cells per donor is limited and culture expansion of CB-HSCs is accompanied by a loss of engraftment potential. In order to analyze the molecular mechanisms leading to this impaired potential we profiled global and local epigenotypes during the expansion of human CB hematopoietic stem and progenitor cells (HPSCs). Human CB-derived CD34+ cells were cultured in serum-free medium together with SCF, TPO, FGF, with or without Igfbp2 and Angptl5 (STF/STFIA cocktails). As compared to the STF cocktail, the STFIA cocktail maintains in vivo repopulation capacity of cultured CD34+ cells. Upon expansion, CD34+ cells genome-wide remodel their epigenotype and depending on the cytokine cocktail, cells show different HK4me3 and H3K27me3 levels. Expanding cells without Igfbp2 and Angptl5 leads to higher global H3K27me3 levels. ChIPseq analyses reveal a cytokine cocktail-dependent redistribution of H3K27me3 profiles. Inhibition of the PRC2 component EZH2 counteracts the culture-associated loss of NOD scid gamma (NSG) engraftment potential. Collectively, our data reveal chromatin dynamics that underlie the culture-associated loss of engraftment potential. We identify PRC2 component EZH2 as being involved in the loss of engraftment potential during the in vitro expansion of HPSCs.show moreshow less

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Metadaten
Author: Linda Varagnolo, Quiong Lin, Nadine Obier, Christoph Plass, Johannes Dietl, Martin Zenke, Rainer Claus, Albrecht M. Müller
URN:urn:nbn:de:bvb:20-opus-148374
Document Type:Journal article
Faculties:Medizinische Fakultät / Institut für Medizinische Strahlenkunde und Zellforschung
Language:English
Parent Title (English):Scientific Reports
Year of Completion:2015
Volume:5
Issue:12319
Source:Scientific Reports 5:12319 (2015). DOI: 10.1038/srep12319
DOI:https://doi.org/10.1038/srep12319
Dewey Decimal Classification:6 Technik, Medizin, angewandte Wissenschaften / 61 Medizin und Gesundheit / 610 Medizin und Gesundheit
Tag:EZH2 differentiation trichostatin; epigenomic landscapes; ex vivo expansion; in vivo polycomb; transplantation states genes
Release Date:2018/11/14
Licence (German):License LogoCC BY: Creative-Commons-Lizenz: Namensnennung 4.0 International