2021
DOI: 10.1016/j.eururo.2020.10.029
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Advanced Prostate Cancer with ATM Loss: PARP and ATR Inhibitors

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Cited by 90 publications
(76 citation statements)
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“…However, the responses seen in ATM and CDK12 aberrant advanced prostate cancer with treatment with olaparib administered for >6 months were observed in tumors with high RAD51 scores, indicating that the PARP inhibitor antitumor activity in this subgroup may not be related to complete loss of homologous recombination repair function but perhaps due to the genomic instability in these tumors associated with ATM loss (28). Interestingly, unlike BRCA2 mutation associated cancers, a significant number of the ATM aberrant prostate cancers in the TOPARP-B trial did not have detectable biallelic loss (29) the response rate in this subgroup is low and exploratory analyses of the PROfound trial failed to demonstrate a significant benefit in the ATM mutated disease subset, we have observed durable tumor responses in some prostate cancers with ATM aberrations in keeping with preclinical genomic screen data (30).…”
Section: Discussionmentioning
confidence: 98%
See 1 more Smart Citation
“…However, the responses seen in ATM and CDK12 aberrant advanced prostate cancer with treatment with olaparib administered for >6 months were observed in tumors with high RAD51 scores, indicating that the PARP inhibitor antitumor activity in this subgroup may not be related to complete loss of homologous recombination repair function but perhaps due to the genomic instability in these tumors associated with ATM loss (28). Interestingly, unlike BRCA2 mutation associated cancers, a significant number of the ATM aberrant prostate cancers in the TOPARP-B trial did not have detectable biallelic loss (29) the response rate in this subgroup is low and exploratory analyses of the PROfound trial failed to demonstrate a significant benefit in the ATM mutated disease subset, we have observed durable tumor responses in some prostate cancers with ATM aberrations in keeping with preclinical genomic screen data (30).…”
Section: Discussionmentioning
confidence: 98%
“…ATM protein expression in the ATM group was determined by immunohistochemistry (IHC) staining on 3 to 4μM-thick FFPE sections using the rabbit monoclonal anti-ATM antibody Y170 at 1:400 (catalog no. ab32420; Abcam plc, Cambridge, UK) as previously described (28). IHC slides were assessed by a pathologist, blinded to the patients' clinical characteristics, sequencing findings, and outcome data.…”
Section: Atm Immunohistochemistrymentioning
confidence: 99%
“…Synthetic lethality is explored with PARP inhibitors in several cancers such as ATMdeficient tumors from breast and ovaries, aggressive prostate cancers in combination with ATR inhibitors [243,244], and high-risk neuroblastomas under ATR inhibition [245]. POLQ deficiency is synthetically lethal in combination with PARP inhibitors and associated with mutations of ATM, BRCA, Ku, 53BP1, and FA (Fanconi anaemia) [226,229,246].…”
Section: Targeting the Ddr Protein Network With Synthetic Lethalitymentioning
confidence: 99%
“…4 Loss of the ataxia telangiectasia mutated protein is a common DNA repair defect, being present in up to 10% of advanced prostate cancers. 76 Interestingly, ataxia telangiectasia mutated loss can confer sensitivity to ataxia telangiectasia and Rad3-related protein inhibition in preclinical models; preclinical studies have shown that olaparib-resistant cancer cells with or without ataxia telangiectasia mutated loss may be resensitized to olaparib when combined with ataxia telangiectasia and Rad3-related protein inhibitors. [76][77][78] This has provided rationale for using ataxia telangiectasia and Rad3related protein inhibitors, either alone or in combination with PARP inhibitors, in phase I and II clinical trials, which are currently ongoing.…”
Section: The New Avengers In the Treatment Of Prostate Cancermentioning
confidence: 99%