Breast cancers with a BRCA1-like DNA copy number profile recur less often than expected after high-dose alkylating chemotherapy
Purpose: Breast cancers in carriers of inactivating mutations of the BRCA1 gene carry a specific DNA copy-number signature (“BRCA1-like”). This signature is shared with cancers that inactivate BRCA1 through other mechanisms. Because BRCA1 is important in repair of DNA double-strand breaks through er...
Gespeichert in:
| Hauptverfasser: | , , , , , , , , |
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| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
2015
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| In: |
Clinical cancer research
Year: 2014, Jahrgang: 21, Heft: 4, Pages: 763-770 |
| ISSN: | 1557-3265 |
| DOI: | 10.1158/1078-0432.CCR-14-1894 |
| Online-Zugang: | Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1158/1078-0432.CCR-14-1894 Verlag, lizenzpflichtig, Volltext: https://clincancerres.aacrjournals.org/content/early/2015/01/22/1078-0432.CCR-14-1894 
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| Verfasserangaben: | Philip C. Schouten, Frederik Marmé, Sebastian Aulmann, Hans-Peter Sinn, Hendrik F. van Essen, Bauke Ylstra, Michael Hauptmann, Andreas Schneeweiss, and Sabine C. Linn |
MARC
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| 245 | 1 | 0 | |a Breast cancers with a BRCA1-like DNA copy number profile recur less often than expected after high-dose alkylating chemotherapy |c Philip C. Schouten, Frederik Marmé, Sebastian Aulmann, Hans-Peter Sinn, Hendrik F. van Essen, Bauke Ylstra, Michael Hauptmann, Andreas Schneeweiss, and Sabine C. Linn |
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| 520 | |a Purpose: Breast cancers in carriers of inactivating mutations of the BRCA1 gene carry a specific DNA copy-number signature (“BRCA1-like”). This signature is shared with cancers that inactivate BRCA1 through other mechanisms. Because BRCA1 is important in repair of DNA double-strand breaks through error-free homologous recombination, patients with a BRCA1-like tumor may benefit from high-dose alkylating (HD) chemotherapy, which induces DNA double-strand breaks. - Experimental Design: We investigated a single institution cohort of high-risk patients that received tandem HD chemotherapy schedule comprising ifosfamide, epirubicin, and carboplatin or conventional chemotherapy. We classified copy-number profiles to be BRCA1-like or non-BRCA1-like and analyzed clinical associations and performed survival analysis with a treatment by biomarker interaction design. - Results: BRCA1-like status associated with high-grade and triple-negative breast cancers. BRCA1-like cases benefitted from the HD compared with a conventional regimen on disease-free survival (DFS): [hazard ratio (HR), 0.05; 95% confidence interval (CI), 0.01-0.38; P = 0.003]; distant DFS (DDFS): (HR, 0.06; 95% CI, 0.01-0.43; P = 0.01); and overall survival (OS; HR, 0.15; 95% CI, 0.03-0.83; P = 0.03) after correction for prognostic factors. No such benefit was observed in the non-BRCA1-like cases on DFS (HR, 0.74; 95% CI, 0.38-1.46; P = 0.39), DDFS (HR, 0.79; 95% CI, 0.41-1.52; P = 0.47), and OS (HR, 0.93; 95% CI, 0.52-1.64; P = 0.79). The P values for interaction were 0.01 (DFS), 0.01 (DDFS), and 0.045 (OS). - Conclusions: BRCA1-like tumors recurred significantly less often after HD than conventional chemotherapy. BRCA1-like copy-number profile classification may be a predictive marker for HD alkylating chemotherapy. Clin Cancer Res; 1-8. ©2014 AACR. | ||
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