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The Cdkn1aSUPER Mouse as a Tool to Study p53-Mediated Tumor Suppression

Alessandro Torgovnick*, Jan Michel Heger, Vasiliki Liaki, Jörg Isensee, Anna Schmitt, Gero Knittel, Arina Riabinska, Filippo Beleggia, Lucie Laurien, Uschi Leeser, Christian Jüngst, Florian Siedek, Wenzel Vogel, Niklas Klümper, Hendrik Nolte, Maike Wittersheim, Lars Tharun, Roberta Castiglione, Marcus Krüger, Astrid SchaussSven Perner, Manolis Pasparakis, Reinhard Büttner, Thorsten Persigehl, Tim Hucho, Grit Sophie Herter-Sprie, Björn Schumacher, Hans Christian Reinhardt

*Korrespondierende/r Autor/-in für diese Arbeit

Abstract

Cdkn1a, which encodes p21, functions as a major route for p53-mediated cell-cycle arrest. However, the consequence of Cdkn1a gene dosage on tumor suppression has not been systematically investigated. Here, we employed BAC transgenesis to generate a Cdkn1aSUPER mouse, which harbors an additional Cdkn1a allele within its natural genomic context. We show that these mice display enhanced cell-cycle arrest and reduced apoptosis in response to genotoxic stress. Furthermore, using a chemically induced skin cancer model and an autochthonous Kras-driven lung adenocarcinoma model, we show that Cdkn1aSUPER mice display a cancer protection phenotype that is indistinguishable from that observed in Tp53SUPER animals. Moreover, we demonstrate that Tp53 and Cdkn1a cooperate in mediating cancer resistance, using a chemically induced fibrosarcoma model. Overall, our Cdkn1aSUPER allele enabled us to assess the contribution of Cdkn1a to Tp53-mediated tumor suppression. Torgovnick et al. create a mouse model, carrying a third copy of Cdkn1a (p21), which shows enhanced cell-cycle arrest capacity and protection against DNA damage-induced apoptosis. The Cdkn1aSUPER animals display delayed epithelial regeneration and a robust cancer resistance phenotype, highlighting the importance of p21 in p53-dependent tumor suppression.

OriginalspracheEnglisch
ZeitschriftCell Reports
Jahrgang25
Ausgabenummer4
Seiten (von - bis)1027-1039.e6
ISSN2211-1247
DOIs
PublikationsstatusVeröffentlicht - 23.10.2018

Fördermittel

We are indebted to M. Serrano (Institute for Research in Biomedicine; Barcelona) for providing cell lines derived from 3MC-induced sarcomas. M. van Vugt (Utrecht Medical Center) provided the GFP:53BP1 construct. We thank A. Florin and U. Rommerscheidt-Fuß from the Institute of Pathology, University Hospital Cologne, for their outstanding technical support. This work was supported by the Deutsche Forschungsgemeinschaft ( KFO-286/RP2 , RE 2246/2-1 , RE 2246/7-1 CECAD , SFB-829 to H.C.R., CECAD , SFB-829 , SFB-670 , KFO-286/RP1 , KFO-329 to B.S. and HE 6897/1-1 to G.S.H.-S.), the German federal state North Rhine Westphalia (NRW) as part of the EFRE initiative (grant LS-1-1-030a , H.C.R.), the Else Kröner-Fresenius Stiftung ( EKFS-2014-A06 , H.C.R.), the European Commission (ERC Starting grant 260383 and the FP7 Marie Curie Actions ITN CodeAge 316354 , ITN aDDRess 316390 , ITN MARRIAGE 316964 , and the Flag-Era-JTC2015 GRAPHENE to B.S.), the Deutsche Krebshilfe ( 111724 , H.C.R., 70112899 to B.S.), the Bundesministerium für Forschung und Bildung (Sybacol FKZ0315893 ) and the Koeln Fortune Program/Faculty of Medicine, University of Cologne ( 38/2010 to G.S.H.-S.). The results are in part based upon data generated by the TCGA Research Network: http://cancergenome.nih.gov/ .

UN SDGs

Dieser Output leistet einen Beitrag zu folgendem(n) Ziel(en) für nachhaltige Entwicklung

  1. SDG 3 – Gesundheit und Wohlergehen
    SDG 3 – Gesundheit und Wohlergehen

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