Abstract
Defects in maintaining genome integrity are a hallmark of cancer. The DNA damage response kinase ATM is frequently mutated in human cancer, but the significance of these events to chemotherapeutic efficacy has not been examined deeply in whole organism models. Here we demonstrate that bi-allelic Atm deletion in mouse models of Kras-mutant lung adenocarcinoma does not affect cisplatin responses. In marked contrast, Atm-deficient tumors displayed an enhanced response to the topoisomerase-II poison etoposide. Moreover, Atm-deficient cells and tumors were sensitive to the PARP inhibitor olaparib. This actionable molecular addiction to functional PARP1 signaling was preserved in models that were proficient or deficient in p53, resembling standard or high-risk genetic constellations, respectively. Atm deficiency also markedly enhanced sensitivity to the ATR inhibitor VE-822. Taken together, our results provide a functional rationale to profile human tumors for disabling ATM mutations, particularly given their impact on PARP1 and ATR inhibitors.
| Original language | English |
|---|---|
| Journal | Cancer Research |
| Volume | 77 |
| Issue number | 11 |
| Pages (from-to) | 3040-3056 |
| Number of pages | 17 |
| ISSN | 0008-5472 |
| DOIs | |
| Publication status | Published - 01.06.2017 |
Funding
We are indebted to our patients, who provided primary material. We thank Alexandra Florin, Marion M?ller, and Ursula Rommerscheidt-Fu? from the Institute of Pathology, University Hospital Cologne, for their outstanding technical support. Some analyses conducted in this work were in parts based upon data that was generated by The Cancer Genome Atlas managed by the NCI and NHGRI. This work was supported by the Volkswagenstiftung (Lichtenberg Program; H.C. Reinhardt), the Deutsche Forschungsgemeinschaft (KFO-286; H. C. Reinhardt and M. Peifer), the Bundesministerium f?r Bildung und Forschung (SMOOSE; H. C. Reinhardt, M. Peifer, R. B?ttner and MILES, M. Peifer), the German federal state North Rhine Westphalia (NRW) as part of the EFRE initiative (grant LS-1-1-030a to H. C. Reinhardt), the Else Kr?ner-Fresenius Stiftung (EKFS-2014-A06 to H. C. Reinhardt), and the Deutsche Krebshilfe (111724 to H. C. Reinhardt). The costs of publication of this article were defrayed in part by the payment of page charges. This article must therefore be hereby marked advertisement in accordance with 18 U.S.C. Section 1734 solely to indicate this fact.
UN SDGs
This output contributes to the following UN Sustainable Development Goals (SDGs)
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SDG 3 Good Health and Well-being
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