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Trends Genet. 2012 Mar;28(3):128-36. doi: 10.1016/j.tig.2011.12.002. Epub 2012 Jan 20.

The p53 network: cellular and systemic DNA damage responses in aging and cancer.

Author information

1
Cologne Excellence Cluster on Cellular Stress Response in Aging-Associated Diseases, University of Cologne, 50674 Cologne, Germany. christian.reinhardt@uk-koeln.de

Abstract

Genome instability contributes to cancer development and accelerates age-related pathologies as evidenced by a variety of congenital cancer susceptibility and progeroid syndromes that are caused by defects in genome maintenance mechanisms. DNA damage response (DDR) pathways that are mediated through the tumor suppressor p53 play an important role in the cell-intrinsic responses to genome instability, including a transient cell cycle arrest, senescence and apoptosis. Both senescence and apoptosis are powerful tumor-suppressive pathways preventing the uncontrolled proliferation of transformed cells. However, both pathways can potentially deplete stem and progenitor cell pools, thus promoting tissue degeneration and organ failure, which are both hallmarks of aging. p53 signaling is also involved in mediating non-cell-autonomous interactions with the innate immune system and in the systemic adjustments during the aging process. The network of p53 target genes thus functions as an important regulator of cancer prevention and aging.

PMID:
22265392
PMCID:
PMC4120491
DOI:
10.1016/j.tig.2011.12.002
[Indexed for MEDLINE]
Free PMC Article

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