Tumor necrosis factor restricts hematopoietic stem cell activity in mice: involvement of two distinct receptors.
Author
Summary, in English
Whereas maintenance of hematopoietic stem cells (HSCs) is a requisite for life, uncontrolled expansion of HSCs might enhance the propensity for leukemic transformation. Accordingly, HSC numbers are tightly regulated. The identification of physical cellular HSC niches has underscored the importance of extrinsic regulators of HSC homeostasis. However, whereas extrinsic positive regulators of HSCs have been identified, opposing extrinsic repressors of HSC expansion in vivo have yet to be described. Like many other acute and chronic inflammatory diseases, bone marrow (BM) failure syndromes are associated with tumor necrosis factor-α (TNF) overexpression. However, the in vivo relevance of TNF in the regulation of HSCs has remained unclear. Of considerable relevance for normal hematopoiesis and in particular BM failure syndromes, we herein demonstrate that TNF is a cell-extrinsic and potent endogenous suppressor of normal HSC activity in vivo in mice. These effects of TNF involve two distinct TNF receptors.
Department/s
- Hematopoietic and immunologic developement
- Department of Experimental Medical Science
- Stem Cell Center
- StemTherapy: National Initiative on Stem Cells for Regenerative Therapy
Publishing year
2011
Language
English
Pages
1563-1570
Publication/Series
Journal of Experimental Medicine
Volume
208
Issue
8
Full text
Links
Document type
Journal article
Publisher
Rockefeller University Press
Topic
- Cell and Molecular Biology
Status
Published
Research group
- Hematopoietic and immunologic developement
ISBN/ISSN/Other
- ISSN: 1540-9538