Feedback signals in myelodysplastic syndromes: increased self-renewal of the malignant clone suppresses normal hematopoiesis
Myelodysplastic syndromes are diseases which are characterized by ineffective blood formation. There is accumulating evidence that they are caused by an aberrant hematopoietic stem cell. However, it is yet unclear how this malignant clone suppresses normal hematopoiesis. To this end, we generated ma...
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| Main Authors: | , , , |
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| Format: | Article (Journal) |
| Language: | English |
| Published: |
April 24, 2014
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| In: |
PLoS Computational Biology
Year: 2014, Volume: 10, Issue: 4 |
| ISSN: | 1553-7358 |
| DOI: | 10.1371/journal.pcbi.1003599 |
| Online Access: | Verlag, Volltext: http://dx.doi.org/10.1371/journal.pcbi.1003599 Verlag, Volltext: http://journals.plos.org/ploscompbiol/article?id=10.1371/journal.pcbi.1003599 Verlag, Volltext: http://journals.plos.org/ploscompbiol/article/file?id=10.1371/journal.pcbi.1003599&type=printable 
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| Author Notes: | Thomas Walenda, Thomas Stiehl, Hanna Braun, Julia Fröbel, Anthony D. Ho, Thomas Schroeder, Tamme W. Goecke, Björn Rath, Ulrich Germing, Anna Marciniak-Czochra, Wolfgang Wagner |
| Summary: | Myelodysplastic syndromes are diseases which are characterized by ineffective blood formation. There is accumulating evidence that they are caused by an aberrant hematopoietic stem cell. However, it is yet unclear how this malignant clone suppresses normal hematopoiesis. To this end, we generated mathematical models under the assumption that feedback signals regulate self-renewal and proliferation of normal and diseased stem cells. The simulations demonstrate that the malignant cells must have particularly higher self-renewal rates than normal stem cells - rather than higher proliferation rates. On the other hand, down-regulation of self-renewal by the increasing number of malignant cells in the bone marrow niche can explain impairment of normal blood formation. In fact, we show that serum of patients with myelodysplastic syndrome, as compared to serum of healthy donors, stimulates proliferation and moderately impacts on maintenance of hematopoietic stem and progenitor cells in vitro. Thus, aberrant high self-renewal rates of the malignant clone seem to initiate disease development; suppression of normal blood formation is then caused by a rebound effect of feedback signals which down-regulate self-renewal of normal stem and progenitor cells as well. |
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| Item Description: | Gesehen am 08.08.2017 |
| Physical Description: | Online Resource |
| ISSN: | 1553-7358 |
| DOI: | 10.1371/journal.pcbi.1003599 |