Title |
The PIDDosome activates p53 in response to supernumerary centrosomes
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Published in |
Genes & Development, January 2017
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DOI | 10.1101/gad.289728.116 |
Pubmed ID | |
Authors |
Luca L. Fava, Fabian Schuler, Valentina Sladky, Manuel D. Haschka, Claudia Soratroi, Lisa Eiterer, Egon Demetz, Guenter Weiss, Stephan Geley, Erich A. Nigg, Andreas Villunger |
Abstract |
Centrosomes, the main microtubule-organizing centers in animal cells, are replicated exactly once during the cell division cycle to form the poles of the mitotic spindle. Supernumerary centrosomes can lead to aberrant cell division and have been causally linked to chromosomal instability and cancer. Here, we report that an increase in the number of mature centrosomes, generated by disrupting cytokinesis or forcing centrosome overduplication, triggers the activation of the PIDDosome multiprotein complex, leading to Caspase-2-mediated MDM2 cleavage, p53 stabilization, and p21-dependent cell cycle arrest. This pathway also restrains the extent of developmentally scheduled polyploidization by regulating p53 levels in hepatocytes during liver organogenesis. Taken together, the PIDDosome acts as a first barrier, engaging p53 to halt the proliferation of cells carrying more than one mature centrosome to maintain genome integrity. |
Mendeley readers
Geographical breakdown
Country | Count | As % |
---|---|---|
Unknown | 166 | 100% |
Demographic breakdown
Readers by professional status | Count | As % |
---|---|---|
Researcher | 30 | 18% |
Student > Ph. D. Student | 29 | 17% |
Student > Master | 21 | 13% |
Student > Bachelor | 15 | 9% |
Professor > Associate Professor | 10 | 6% |
Other | 22 | 13% |
Unknown | 39 | 23% |
Readers by discipline | Count | As % |
---|---|---|
Biochemistry, Genetics and Molecular Biology | 69 | 42% |
Agricultural and Biological Sciences | 32 | 19% |
Medicine and Dentistry | 8 | 5% |
Immunology and Microbiology | 3 | 2% |
Pharmacology, Toxicology and Pharmaceutical Science | 2 | 1% |
Other | 9 | 5% |
Unknown | 43 | 26% |