Cooperation of the tumour suppressors IRF-1 and p53 in response to DNA damage
- 1 August 1996
- journal article
- letter
- Published by Springer Science and Business Media LLC in Nature
- Vol. 382 (6594), 816-818
- https://doi.org/10.1038/382816a0
Abstract
NORMALLY growing cells promptly cease DNA synthesis when exposed to genotoxic stresses, such as radiation, and this cell-cycle arrest prevents the accumulation of mutations1,2. The transcription factor interferon regulatory factor (IRF)-1 is essential for the regulation of the interferon system3–5, inhibits cell growth, and manifests tumour-suppressor activities6,7. Here we show that mouse embryonic fibroblasts (EFs) lacking IRF-1 are deficient in their ability to undergo DNA-damage-induced cell-cycle arrest. A similar phenotype has been observed in EFs lacking the tumour suppressor p53 (refs 8, 9), although the expression of IRF-1 and p53 are independent of one another. Furthermore, we show that transcriptional induction of the gene encoding p21 (WAF1, CIP1)10–12 a cell-cycle inhibitor, by γ-irradiation is dependent on both p53 and IRF-1, and that the p21 promoter is activated, either directly or indirectly, by both in a transient cotransfection assay. These two tumour-suppressor transcription factors therefore converge functionally to regulate the cell cycle through the activation of a common target genes.Keywords
This publication has 27 references indexed in Scilit:
- Cell Growth Arrest and Induction of Cyclin-Dependent Kinase Inhibitor p21 WAF1/CIP1 Mediated by STAT1Science, 1996
- Targeted Disruption of the Mouse Stat1 Gene Results in Compromised Innate Immunity to Viral DiseaseCell, 1996
- Targeted Disruption of the Stat1 Gene in Mice Reveals Unexpected Physiologic Specificity in the JAK–STAT Signaling PathwayCell, 1996
- Induction of apoptosis in HeLa cells by trans-activation-deficient p53.Genes & Development, 1995
- An IRF-1-dependent pathway of DNA damage-induced apoptosis in mitogen-activated T lymphocytesNature, 1995
- Inhibitors of mammalian G1 cyclin-dependent kinases.Genes & Development, 1995
- Cyclins and cancer II: Cyclin D and CDK inhibitors come of ageCell, 1994
- Requirement for Transcription Factor IRF-1 in NO Synthase Induction in MacrophagesScience, 1994
- p21 is a universal inhibitor of cyclin kinasesNature, 1993
- WAF1, a potential mediator of p53 tumor suppressionCell, 1993