Cited by 2,185PARP inhibition in cancer therapyProstate Cancer Treatment and ResearchAdvanced Breast Cancer Therapies

DNA-Repair Defects and Olaparib in Metastatic Prostate Cancer

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Mateo, Joaquin, Carreira, Suzanne, Sandhu, Shahneen, Miranda, Susana, Mossop, Helen, Perez-Lopez, Raquel, Nava Rodrigues, Daniel, Robinson, Dan +43 more·2015·New England Journal of Medicine

Abstract

BACKGROUND: Prostate cancer is a heterogeneous disease, but current treatments are not based on molecular stratification. We hypothesized that metastatic, castration-resistant prostate cancers with DNA-repair defects would respond to poly(adenosine diphosphate [ADP]-ribose) polymerase (PARP) inhibition with olaparib. METHODS: We conducted a phase 2 trial in which patients with metastatic, castration-resistant prostate cancer were treated with olaparib tablets at a dose of 400 mg twice a day. The primary end point was the response rate, defined either as an objective response according to Response Evaluation Criteria in Solid Tumors, version 1.1, or as a reduction of at least 50% in the prostate-specific antigen level or a confirmed reduction in the circulating tumor-cell count from 5 or more cells per 7.5 ml of blood to less than 5 cells per 7.5 ml. Targeted next-generation sequencing, exome and transcriptome analysis, and digital polymerase-chain-reaction testing were performed on samples from mandated tumor biopsies. RESULTS: Overall, 50 patients were enrolled; all had received prior treatment with docetaxel, 49 (98%) had received abiraterone or enzalutamide, and 29 (58%) had received cabazitaxel. Sixteen of 49 patients who could be evaluated had a response (33%; 95% confidence interval, 20 to 48), with 12 patients receiving the study treatment for more than 6 months. Next-generation sequencing identified homozygous deletions, deleterious mutations, or both in DNA-repair genes--including BRCA1/2, ATM, Fanconi's anemia genes, and CHEK2--in 16 of 49 patients who could be evaluated (33%). Of these 16 patients, 14 (88%) had a response to olaparib, including all 7 patients with BRCA2 loss (4 with biallelic somatic loss, and 3 with germline mutations) and 4 of 5 with ATM aberrations. The specificity of the biomarker suite was 94%. Anemia (in 10 of the 50 patients [20%]) and fatigue (in 6 [12%]) were the most common grade 3 or 4 adverse events, findings that are consistent with previous studies of olaparib. CONCLUSIONS: Treatment with the PARP inhibitor olaparib in patients whose prostate cancers were no longer responding to standard treatments and who had defects in DNA-repair genes led to a high response rate. (Funded by Cancer Research UK and others; ClinicalTrials.gov number, NCT01682772; Cancer Research UK number, CRUK/11/029.).

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  • Accurate detection of HRD is of clinical relevance as it is indicative of sensitivity to targeted therapy with PARPi and DNA damaging reagents.

    “Accurate detection of HRD is of clinical relevance as it is indicative of sensitivity to targeted therapy with poly ADP-ribose polymerase inhibitors (PARPi)3,4 as well as to DNA damaging reagents1.”

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Authors
Mateo, J., Carreira, S., Sandhu, S., Miranda, S., Mossop, H., Perez-Lopez, R., Nava Rodrigues, D., Robinson, D., Omlin, A., Tunariu, N., Boysen, G., Porta, N., Flohr, P., Gillman, A., Figueiredo, I., Paulding, C., Seed, G., Jain, S., Ralph, C., Protheroe, A., Hussain, S., Jones, R., Elliott, T., McGovern, U., Bianchini, D., Goodall, J., Zafeiriou, Z., Williamson, C. T., Ferraldeschi, R., Riisnaes, R., Ebbs, B., Fowler, G., Roda, D., Yuan, W., Wu, Y.-M., Cao, X., Brough, R., Pemberton, H., A’Hern, R., Swain, A., Kunju, L. P., Eeles, R., Attard, G., Lord, C. J., Ashworth, A., Rubin, M. A., Knudsen, K. E., Feng, F. Y., Chinnaiyan, A. M., Hall, E., & de Bono, J. S.
Affiliations
  • Institute of Cancer Research (GB)
  • Royal Marsden NHS Foundation Trust (GB)
  • University of Michigan (US)
  • Queen's University Belfast (GB)
  • University of Leeds (GB)
  • Churchill Hospital (GB)
  • University of Liverpool (GB)
  • Beatson West of Scotland Cancer Centre (GB)
  • The Christie Hospital (GB)
  • University College Hospital (GB)
  • Weill Cornell Medicine (US)
  • Thomas Jefferson University (US)
Venue
New England Journal of Medicine
Published
2015-10-29
Volume
373
Issue
18
Pages
1697-1708
ISSN
  • 0028-4793 (ISSN-L)
  • 1533-4406
OpenAlex
W2235405584
Cited by
2,185
References
43
Citations by year
2026: 85 · 2025: 114 · 2024: 140 · 2023: 180 · 2022: 199 · 2021: 236 · 2020: 284 · 2019: 248 · 2018: 257 · 2017: 242 · 2016: 182 · 2015: 10 · 2014: 3
FWCI
100.59
Type
journal article
Language
en
Open access
Licence
other-oa
Locations
  • New England Journal of Medicine (publishedVersion, other-oa)
  • PubMed (publishedVersion)
  • White Rose Research Online (University of Leeds, The University of Sheffield, University of York) (acceptedVersion)
  • PubMed Central (acceptedVersion)
  • Research Portal (Queen's University Belfast) (submittedVersion, other-oa)
  • The Medicine Forum (submittedVersion)
  • ENLIGHTEN (Jurnal Bimbingan dan Konseling Islam) (submittedVersion)
  • eScholarship (California Digital Library) (submittedVersion)
  • Newcastle University ePrints (Newcastle Univesity)
Funders
  • American Association for Cancer Research
  • Prostate Cancer Foundation
  • Bristol-Myers Squibb
  • Pfizer
  • AstraZeneca
  • GlaxoSmithKline
  • Sanofi
  • Celgene
  • Royal Marsden NHS Foundation Trust
  • Les Laboratories Pierre Fabre
  • Cancer Research UK (14276, C12540/A13230, C12540 A12829, C1491/ A15955, 12829, C1491/A9895, 15007, 13239, A15955, 13230, 17528, CRUK/11/029, A9895)
  • National Institute for Health and Care Research (NF-SI-0510-10096, CL-2008-22-001)
  • Prostate Cancer UK (PG12-49)
  • European Commission (625792)
  • Public Health Agency (SPI/3315/06)
  • Oncolytics Biotech
  • Astellas Pharma
  • European Society for Medical Oncology
  • Genentech
  • Stand Up To Cancer
  • Medical Research Council (MR/M003272/1)
  • National Cancer Institute (R01CA182569, P30CA056036)
  • Cilag
Topics
  • Health Sciences › Medicine › Oncology › PARP inhibition in cancer therapy
  • Health Sciences › Medicine › Pulmonary and Respiratory Medicine › Prostate Cancer Treatment and Research
  • Health Sciences › Medicine › Pulmonary and Respiratory Medicine › Advanced Breast Cancer Therapies
Keywords
olaparib, PARP inhibition, metastatic castration-resistant prostate cancer, DNA repair deficiency, Fanconi anemia genes, CHEK2, germline mutations, somatic deletions, biomarker-guided therapy, targeted next-generation sequencing, circulating tumor cells, prostate-specific antigen, anemia, fatigue, treatment response rate
MeSH terms
Poly(ADP-ribose) Polymerase Inhibitors, Adult, Aged, Anemia, Antineoplastic Agents, DNA Repair, Enzyme Inhibitors, Fatigue, Humans, Male, Middle Aged, Mutation, Neoplasm Metastasis, Phthalazines, Piperazines, Prostatic Neoplasms, Genes, Tumor Suppressor, Drug Resistance, Neoplasm, Genes, BRCA2, Ataxia Telangiectasia Mutated Proteins

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