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• W2783596779 abstract "Purpose: Somatic mutations in IDH1/2 occur in approximately 20% of patients with myeloid neoplasms, including acute myeloid leukemia (AML). IDH1/2MUT enzymes produce D-2-hydroxyglutarate (D2HG), which associates with increased DNA damage and improved responses to chemo/radiotherapy and PARP inhibitors in solid tumor cells. Whether this also holds true for IDH1/2MUT AML is not known.Experimental Design: Well-characterized primary IDH1MUT, IDH2MUT, and IDH1/2WT AML cells were analyzed for DNA damage and responses to daunorubicin, ionizing radiation, and PARP inhibitors.Results:IDH1/2MUT caused increased DNA damage and sensitization to daunorubicin, irradiation, and the PARP inhibitors olaparib and talazoparib in AML cells. IDH1/2MUT inhibitors protected against these treatments. Combined treatment with a PARP inhibitor and daunorubicin had an additive effect on the killing of IDH1/2MUT AML cells. We provide evidence that the therapy sensitivity of IDH1/2MUT cells was caused by D2HG-mediated downregulation of expression of the DNA damage response gene ATM and not by altered redox responses due to metabolic alterations in IDH1/2MUT cells.Conclusions:IDH1/2MUT AML cells are sensitive to PARP inhibitors as monotherapy but especially when combined with a DNA-damaging agent, such as daunorubicin, whereas concomitant administration of IDH1/2MUT inhibitors during cytotoxic therapy decrease the efficacy of both agents in IDH1/2MUT AML. These results advocate in favor of clinical trials of PARP inhibitors either or not in combination with daunorubicin in IDH1/2MUT AML. Clin Cancer Res; 24(7); 1705-15. ©2018 AACR." @default.
• W2783596779 created "2018-01-26" @default.
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• W2783596779 date "2018-04-01" @default.
• W2783596779 modified "2023-10-17" @default.
• W2783596779 title "<i>IDH1/2</i> Mutations Sensitize Acute Myeloid Leukemia to PARP Inhibition and This Is Reversed by IDH1/2-Mutant Inhibitors" @default.
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• W2783596779 doi "https://doi.org/10.1158/1078-0432.ccr-17-2796" @default.
• W2783596779 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/5884732" @default.
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