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Yerushalmi R, Pomerantz A, Lewin R, Paluch-Shimon S, Soussan-Gutman L, Baehner FL, Voet H, Bareket-Samish A, Kedar I, Goldberg Y, Peretz-Yablonski T, Kadouri L. BRCA1/2 mutation carriers vs the general breast cancer population (N = 799,986): 21-gene assay-based molecular characterization. Breast Cancer Res Treat 2024; 206:67-76. [PMID: 38568368 PMCID: PMC11182787 DOI: 10.1007/s10549-024-07271-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2023] [Accepted: 01/24/2024] [Indexed: 06/18/2024]
Abstract
PURPOSE We compared 21-gene recurrence score (RS) distribution and expression of the single-gene/gene groups within this assay between BC patients with pathogenic variants (PV) in BRCA1/2 vs the general 21-gene-tested BC population. METHODS This retrospective study included consecutive 21-gene-tested female ER + HER2-negative BC patients with germline PVs in BRCA1/2. RS/gene expression data were compared to a previously described commercial use database (CDB, N = 799,986). Chi-square and 1-sample t test were used to compare RS distribution and single-gene/gene group scores between the study group and the CDB. RESULTS Study group patients (N = 81) were younger and their RS results were higher compared to the CDB (age: median [IQR], 56 [47-61.5] vs 60 [51-67] years; p < 0.001; proportion of patients with RS ≥ 26: 49.4% vs 16.4%, p < 0.001). Expression of 12/16 cancer genes in the assay and the ER, proliferation, and invasion gene group scores differed significantly between the study group and the CDB, all in a direction contributing to higher RS. The differences between the study group and the CDB were mostly retained, upon stratifying the patients by menopausal status. CONCLUSION BC patients with PVs in BRCA1/2 have higher RS results that stem from distinct gene expression profiles in the majority of genes in the 21-gene assay.
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Affiliation(s)
- Rinat Yerushalmi
- Davidoff Cancer Center, Rabin Medical Center, 39 Jabotinski St, 49414, Petah Tikva, Israel.
- Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel.
| | - Adi Pomerantz
- Davidoff Cancer Center, Rabin Medical Center, 39 Jabotinski St, 49414, Petah Tikva, Israel
| | - Ron Lewin
- Radiation Oncology Dept, Sheba Medical Center, Ramat Gan, Israel
| | - Shani Paluch-Shimon
- Sharett Institute of Oncology, Hadassah Hebrew University Hospital, Jerusalem, Israel
- Faculty of Medicine, Hebrew University, Jerusalem, Israel
| | | | | | - Hillary Voet
- Environmental Economics and Management, Hebrew University of Jerusalem, Rehovot, Israel
| | | | - Inbal Kedar
- Rabin Medical Center, Raphael Recanati Genetic Institute, Petah Tikva, Israel
| | - Yael Goldberg
- Rabin Medical Center, Raphael Recanati Genetic Institute, Petah Tikva, Israel
| | - Tamar Peretz-Yablonski
- Sharett Institute of Oncology, Hadassah Hebrew University Hospital, Jerusalem, Israel
- Faculty of Medicine, Hebrew University, Jerusalem, Israel
| | - Luna Kadouri
- Sharett Institute of Oncology, Hadassah Hebrew University Hospital, Jerusalem, Israel
- Faculty of Medicine, Hebrew University, Jerusalem, Israel
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Vidarsdottir L, Olafsdottir EJ, Barkardottir RB, Bjarnadottir O, Jonasson JG, Sigurdsson S, Tryggvadottir L. Estrogen receptor-positive breast cancer and adverse outcome in BRCA2 mutation carriers and young non-carrier patients. NPJ Breast Cancer 2023; 9:95. [PMID: 38036573 PMCID: PMC10689749 DOI: 10.1038/s41523-023-00600-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2023] [Accepted: 11/09/2023] [Indexed: 12/02/2023] Open
Abstract
Estrogen receptor-positive (ER+) breast cancer generally confers a more favorable prognosis than ER-negative cancer, however, a different picture is emerging for BRCA2 mutation carriers and young patients. We used nationwide data from population-based registries to study prognostic effects in those two groups. Of all 2817 eligible women diagnosed with breast cancer in Iceland during 1980-2004, 85% had been tested for the Icelandic 999del5 BRCA2 (c.771_775delTCAAA) founder pathogenic variant. We compared breast cancer-specific survival, effects of ER status, other clinical parameters, and treatment, between three mutually exclusive groups: BRCA2-carriers, non-carriers diagnosed 40 years or younger, and older non-carriers. Prevalence of the BRCA2 mutation among tested patients <=40 years of age was 21.0%, but it was 5.4% among women diagnosed >40 years of age. For ER+ cancer, breast cancer-specific 15-year survival was 49.7%, 55.2%, and 74.7%, among BRCA2-carriers, young and older non-carriers, respectively, whereas for ER-negative cancer, survival was similar (64.0-69.3%) for all three groups. Neither BRCA2 carriers nor young non-carriers did tumor grade 3 predict worse survival than did tumor grade 1. The adverse outcome for the young cases cannot be explained by BRCA2 mutations, as carriers were excluded from the group. Those two clinically important patient groups need special attention with respect to treatment choices, in particular, if diagnosed with ER+ tumors. It is thus advisable to have knowledge of BRCA2 status when treatment decisions are made. Finally, it is important to understand the biological basis for the specific nature of ER+ tumors in young women and BRCA2 carriers.
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Affiliation(s)
- Linda Vidarsdottir
- Faculty of Medicine, University of Iceland, Sturlugata 8, Reykjavik, Iceland
- BioMedical Center, University of Iceland, Sturlugata 8, Reykjavik, Iceland
| | | | - Rosa B Barkardottir
- BioMedical Center, University of Iceland, Sturlugata 8, Reykjavik, Iceland
- Department of Pathology, Landspitali-University Hospital, Reykjavik, Iceland
| | - Olöf Bjarnadottir
- Department of Oncology, Landspitali-University Hospital, Reykjavik, Iceland
| | - Jon G Jonasson
- Faculty of Medicine, University of Iceland, Sturlugata 8, Reykjavik, Iceland
- Department of Pathology, Landspitali-University Hospital, Reykjavik, Iceland
| | - Stefan Sigurdsson
- Faculty of Medicine, University of Iceland, Sturlugata 8, Reykjavik, Iceland
- BioMedical Center, University of Iceland, Sturlugata 8, Reykjavik, Iceland
| | - Laufey Tryggvadottir
- Faculty of Medicine, University of Iceland, Sturlugata 8, Reykjavik, Iceland.
- BioMedical Center, University of Iceland, Sturlugata 8, Reykjavik, Iceland.
- Icelandic Cancer Registry, Icelandic Cancer Society, Reykjavik, Iceland.
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Deb S, Chakrabarti A, Fox SB. Prognostic and Predictive Biomarkers in Familial Breast Cancer. Cancers (Basel) 2023; 15:cancers15041346. [PMID: 36831687 PMCID: PMC9953970 DOI: 10.3390/cancers15041346] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2022] [Revised: 02/06/2023] [Accepted: 02/15/2023] [Indexed: 02/23/2023] Open
Abstract
Large numbers of breast cancers arise within a familial context, either with known inherited germline mutations largely within DNA repair genes, or with a strong family history of breast and/or ovarian cancer, with unknown genetic underlying mechanisms. These cancers appear to be different to sporadic cases, with earlier age of onset, increased multifocality and with association with specific breast cancer histological and phenotypic subtypes. Furthermore, tumours showing homologous recombination deficiency, due to loss of BRCA1, BRCA2, PALB2 and CHEK2 function, have been shown to be especially sensitive to platinum-based chemotherapeutics and PARP inhibition. While there is extensive research and data accrued on risk stratification and genetic predisposition, there are few data pertaining to relevant prognostic and predictive biomarkers within this breast cancer subgroup. The following is a review of such biomarkers in male and female familial breast cancer, although the data for the former are particularly sparse.
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Affiliation(s)
- Siddhartha Deb
- Anatpath, Gardenvale, VIC 3185, Australia
- Monash Health Pathology, Clayton, VIC 3168, Australia
- Correspondence:
| | | | - Stephen B. Fox
- Sir Peter MacCallum Department of Oncology, Peter MacCallum Cancer Centre, University of Mebourne, Melbourne, VIC 3101, Australia
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Edaily S, Abdel-Razeq H. Management Strategies of Breast Cancer Patients with BRCA1 and BRCA2 Pathogenic Germline Variants. Onco Targets Ther 2022; 15:815-826. [PMID: 35923470 PMCID: PMC9343017 DOI: 10.2147/ott.s369844] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2022] [Accepted: 07/13/2022] [Indexed: 11/23/2022] Open
Abstract
Most of breast cancer cases are sporadic; however, 15–20% are associated with family history, and some are inherited. Among those, deleterious mutations in BRCA1 and BRCA2 tumor suppressor genes are the most commonly encountered pathogenic germline variants (PGVs). Given the availability and affordability of multi-gene panel sequencing technologies, testing for PGVs is commonly practiced. With our enhanced understanding of cancer genetics and specific molecular alterations, the better acceptance of risk-directed screening and prevention, and the recent introduction of novel targeted therapies, management of BRCA-positive breast cancers is taking a new direction, focusing more on risk-reducing interventions, including mastectomy and salpingo-oophorectomy, and incorporating special treatment regimens, including platinum-based chemotherapy, and the recently-introduced PARP (poly (ADP)-ribose polymerase) inhibitors. Given the recent advances in reproductive technology and molecular medicine, younger women with PGVs may have the option of embryo selection through preimplantation genetic testing and diagnosis, thus preventing the potential transmission of the implicated genes to the next generations. In this review, we cover the clinical implications of identifying a pathogenic germline mutation in BRCA1 and BRCA2 genes in breast cancer patients, and their relatives, across the continuum of care – from cancer prevention and early detection, through active treatment and up to survivorship issues.
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Affiliation(s)
- Sarah Edaily
- Department of Internal Medicine, King Hussein Cancer Center, Amman, Jordan
| | - Hikmat Abdel-Razeq
- Department of Internal Medicine, King Hussein Cancer Center, Amman, Jordan
- Correspondence: Hikmat Abdel-Razeq, Department of Internal Medicine, King Hussein Cancer Center, Queen Rania Al Abdullah Street, P.O. Box: 1269, Amman, 11941, Jordan, Tel +962-6 5300460, Ext: 1000, Email
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