Abstract
Accumulated data suggest that the unique function of stem cells to self-renew is under the strong control of a sensor system detecting potential threats to genomic integrity. Reactive oxygen species, the most significant mutagens in stem cells, when elevated, activate the protective mechanisms blocking self-renewal and at the same time serve as a signal stimulating stem cell differentiation. Based on studies performed primarily on hematopoietic stem cells and embryonic stem cells, we outline the signaling networks connecting the ATM, MAPK14 (p38) and FRAP1 (mTOR) protein kinases, the p53 tumor suppressor, the PTEN phosphatase, and the TEL, NF\(\upkappa\)B, FoxO, and HIF transcription factor families as a potential stress-controlled differentiation mechanism regulating stem cell fate decisions. An intriguing observation to come from these studies is that stem cell self-renewal capacity appears to be pharmacologically preserved by anti-oxidative agents.
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Riz, I., Hawley, R.G. (2009). Genomic Stability in Stem Cells. In: Rajasekhar, V.K., Vemuri, M.C. (eds) Regulatory Networks in Stem Cells. Stem Cell Biology and Regenerative Medicine. Humana Press. https://doi.org/10.1007/978-1-60327-227-8_6
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DOI: https://doi.org/10.1007/978-1-60327-227-8_6
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