Abstract
A fundamental principle in malignant tranformation is the ability of cancer cells to escape the naturally occurring cell-intrinsic responses to DNA damage. Tumors progress despite the accumulation of DNA lesions. However, the underlying mechanisms of this tolerance to genotoxic stress are still poorly characterized. Here, we show that replication stress occurs in Kras-driven murine lung adenocarcinomas, as well as in proliferating murine embryonic and adult tissues. We identify the transcriptional regulator AATF/CHE-1 as a key molecule to sustain proliferative tissues and tumor progression in parts by inhibiting p53-driven apoptosis in vivo. In an autochthonous Kras-driven lung adenocarcinoma model, deletion of Aatf delayed lung cancer formation predominantly in a p53-dependent manner. Moreover, targeting Aatf in existing tumors through a dual recombinase strategy caused a halt in tumor progression. Taken together, these data suggest that AATF may serve as a drug target to treat KRAS-driven malignancies.
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Acknowledgements
The authors thank Alexandra Florin, Marion Müller and Ursula Rommerscheidt-Fuß, Institute of Pathology and Martyna Brütting, CECAD, University Hospital Cologne, for their outstanding technical support.
Funding
This work was supported by Volkswagenstiftung (Lichtenberg Program to HCR), Deutsche Forschungsgemeinschaft (KFO-286 to HCR, SFB-829 to HCR, CN and TB, SCHE1562/2 to BS, BE2212 to TB), Bundesministerium für Bildung und Forschung (SMOOSE to HCR, SYBACOL to TB), German federal state North Rhine Westphalia (NRW) as part of the EFRE initiative (grant LS-1-1-030a to HCR), Else Kröner-Fresenius Stiftung (EKFS-2014-A06 to HCR), Deutsche Krebshilfe (111724, HCR), University of Cologne (Köln Fortune Program to KH), Cologne Cardiovascular Research Center (Graduate Program to MJ), Cologne Graduate School of Ageing Research (to SK), CECAD Research Center Cologne Maternity Leave Fellowship to DW.
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HCR received consulting fees from Abbvie, Vertex, AstraZeneca and Merck. HCR received research funding from Gilead. All other authors declare that they have no competing interests.
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Welcker, D., Jain, M., Khurshid, S. et al. AATF suppresses apoptosis, promotes proliferation and is critical for Kras-driven lung cancer. Oncogene 37, 1503–1518 (2018). https://doi.org/10.1038/s41388-017-0054-6
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DOI: https://doi.org/10.1038/s41388-017-0054-6
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