Abstract
During development hematopoietic stem cells (HSCs) expand in number and persist throughout life by undergoing self-renewing divisions. Nevertheless, the hematopoietic system does not escape the negative effects of aging, suggesting that self-renewal is not complete. A fundamental issue in stem cell biology relates to such age-dependent loss of stem cell activity. Both stem cell intrinsic factors and extrinsic factors associated with an aging micro-environment could contribute to aging of the hematopoietic system. Recently, changes in the clonal composition of the HSC compartment during aging have been put forward as a key factor. Here, we discuss these recent developments and speculate how they may be of clinical relevance.
Original language | English |
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Pages (from-to) | 512-517 |
Number of pages | 6 |
Journal | Current opinion in immunology |
Volume | 23 |
Issue number | 4 |
DOIs | |
Publication status | Published - Aug-2011 |
Keywords
- AGE-RELATED-CHANGES
- ACUTE MYELOID-LEUKEMIA
- BONE-MARROW
- PROGENITOR CELLS
- COMPARTMENT
- NICHE
- MICE
- IMMUNOSENESCENCE
- PROLIFERATION
- REJUVENATION