Abstract
A common polymorphism at codon 72 in p53 gene leads to an arginine to proline aminoacidic substitution which affects in an age-dependent manner the susceptibility of cells to undergo apoptosis after oxidative stress. Here we report that dermal fibroblasts from Proline allele carriers (Pro+) display a higher expression of p21 WAF1 gene, in both basal conditions and after treatment with doxorubicin or camptothecin. This phenomenon is accompanied by a lower susceptibility of Pro+ cells to undergo apoptosis, a lower capability to over cross G1-S transition and an increased propensity to express markers of cell senescence, with respect to fibroblasts from Arginine homozygotes (Pro-). All these phenomena are particularly evident in cells from centenarians. We conclude that the functional difference between the two p53 codon 72 alleles exerts a broad impact on the capability of cell from aged people to respond to stressors such as cytotoxic drugs.
Original language | English (US) |
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Pages (from-to) | 1264-1271 |
Number of pages | 8 |
Journal | Cell Cycle |
Volume | 4 |
Issue number | 9 |
DOIs | |
State | Published - Sep 2005 |
Externally published | Yes |
Keywords
- Apoptosis
- Cell cycle
- Cell senescence
- p21WAF1
- p53 codon 72 polymorphism
ASJC Scopus subject areas
- Molecular Biology
- Developmental Biology
- Cell Biology