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de Freitas Ribeiro AA, Junior NMC, Dos Santos LL. Systematic review of the molecular basis of hereditary breast and ovarian cancer syndrome in Brazil: the current scenario. Eur J Med Res 2024; 29:187. [PMID: 38504328 PMCID: PMC10953197 DOI: 10.1186/s40001-024-01767-x] [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: 07/20/2022] [Accepted: 03/04/2024] [Indexed: 03/21/2024] Open
Abstract
BACKGROUND A detailed understanding of the genetic basis of cancer is of great interest to public health monitoring programs. Although many studies have been conducted in Brazil, a global view on the molecular profile related to hereditary breast and ovarian cancer (HBOC) in this large and heterogeneous population is lacking. METHODS A systematic review following the PRISMA guidelines was conducted in three electronic databases (PubMed, BIREME and SciELO). Brazilian studies covering molecular analysis of genes related to HBOC, published until December 2023, were considered. RESULTS We identified 35 original studies that met all the inclusion criteria. A total of 137 distinct mutations were found in the BRCA1 gene, but four of them corresponded to 44.5% of all mutations found in this gene. The c.5266dupC BRCA1 mutation was responsible for 26.8% of all pathogenic mutations found in the BRCA1 gene in patients with clinical criteria for HBOC from the Brazilian population. Considering all studies that track this mutation in the BRCA1 gene, we found a frequency of 2% (120/6008) for this mutation in Brazilian patients. In the BRCA2 gene, the four most frequent mutations corresponded to 29.2% of pathogenic mutations. Even though it was tracked by few studies, the c.156_157insAlu mutation was responsible for 9.6% of all pathogenic mutations reported in the BRCA2 gene. Seventeen studies found pathogenic mutations in other non-BRCA genes, the c.1010G > A mutation in the TP53 gene being the most frequent one. Considering all studies that screened for this specific mutation in patients with the clinical criteria for HBOC, the frequency of c.1010G > A was estimated at 1.83% (61/3336). CONCLUSIONS Despite significant molecular heterogeneity among mutations in HBOC patients from Brazil, three mutations deserve to be highlighted, c.5266dupC, c.156_157insAlu and c.1010G > A in the BRCA1, BRCA2 and TP53 genes, respectively. With more than 200 records, these three mutations play a vital role in the pathology of breast and ovarian cancer in Brazil. The data collected shed light on the subject, but there is still not enough data from certain subpopulations.
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Affiliation(s)
| | | | - Luciana Lara Dos Santos
- Universidade Federal de São João del Rei (UFSJ), 400 Sebastião Gonçalves Coelho St, Divinópolis, MG, 35501-296, Brazil.
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Gebhart P, Tan Y, Muhr D, Stein C, Singer C. A de Novo BRCA1 Pathogenic Variant in a 29-Year-Old Woman with Triple-Negative Breast Cancer. Breast Care (Basel) 2023; 18:412-416. [PMID: 37901051 PMCID: PMC10601672 DOI: 10.1159/000531612] [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: 04/18/2023] [Accepted: 06/14/2023] [Indexed: 10/31/2023] Open
Abstract
Introduction Germline pathogenic variants in the BRCA1 and BRCA2 genes lead to a highly increased lifetime risk for breast and ovarian cancer. These variants are usually inherited and reports of de novo occurrences are a very rare phenomenon. Case Presentation We report on a breast cancer patient with a de novo BRCA1 variant c.121C>T (p.His41Tyr). The pathogenic variant was detected in leukocyte DNA of a patient with negative family history who had developed early onset, triple-negative breast cancer. The variant was not found in any of the maternal and paternal tissues tested, but it was detected in multiple samples representing all three germ layers of the affected carrier, which renders somatic mosaicism unlikely. Conclusion This case highlights the importance of including early onset of disease and triple negativity of the tumor as criteria for genetic testing, even in patients without family history. Considering the availability of effective breast cancer treatments in patients with pathogenic variants in the BRCA genes, this finding underscores the importance of genetic testing in breast cancer patients.
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Affiliation(s)
- Paulina Gebhart
- Department of Obstetrics and Gynecology, Comprehensive Cancer Center, Medical University of Vienna, Vienna, Austria
| | - Yen Tan
- Department of Obstetrics and Gynecology, Comprehensive Cancer Center, Medical University of Vienna, Vienna, Austria
| | - Daniela Muhr
- Department of Obstetrics and Gynecology, Comprehensive Cancer Center, Medical University of Vienna, Vienna, Austria
| | - Christina Stein
- Center for Forensic Medicine, DNA Central Laboratory, Medical University of Vienna, Vienna, Austria
| | - Christian Singer
- Department of Obstetrics and Gynecology, Comprehensive Cancer Center, Medical University of Vienna, Vienna, Austria
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Yanus GA, Savonevich EL, Sokolenko AP, Romanko AA, Ni VI, Bakaeva EK, Gorustovich OA, Bizin IV, Imyanitov EN. Founder vs. non-founder BRCA1/2 pathogenic alleles: the analysis of Belarusian breast and ovarian cancer patients and review of other studies on ethnically homogenous populations. Fam Cancer 2023; 22:19-30. [PMID: 35596902 DOI: 10.1007/s10689-022-00296-y] [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: 04/20/2022] [Accepted: 05/08/2022] [Indexed: 01/13/2023]
Abstract
The spectrum of BRCA1/2 mutations demonstrates significant interethnic variations. We analyzed for the first time the entire BRCA1/2 coding region in 340 Belarusian cancer patients with clinical signs of BRCA1/2-related disease, including 168 women with bilateral and/or early-onset breast cancer (BC), 104 patients with ovarian cancer and 68 subjects with multiple primary malignancies involving BC and/or OC. BRCA1/2 pathogenic alleles were detected in 98 (29%) women, with 67 (68%) of these being represented by founder alleles. Systematic comparison with other relevant studies revealed that the founder effect observed in Belarus is among the highest estimates observed worldwide. These findings are surprising, given that the population of Belarus did not experience geographic or cultural isolation throughout history.
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Affiliation(s)
- G A Yanus
- Department of Tumor Growth Biology, N.N. Petrov Institute of Oncology, Saint-Petersburg, Russia
| | - E L Savonevich
- Department of Obstetrics and Gynecology, Grodno State Medical University, Grodno, Belarus
| | - A P Sokolenko
- Department of Tumor Growth Biology, N.N. Petrov Institute of Oncology, Saint-Petersburg, Russia. .,Department of Medical Genetics, St.-Petersburg Pediatric Medical University, Saint-Petersburg, Russia.
| | - A A Romanko
- Department of Tumor Growth Biology, N.N. Petrov Institute of Oncology, Saint-Petersburg, Russia.,Department of Medical Genetics, St.-Petersburg Pediatric Medical University, Saint-Petersburg, Russia
| | - V I Ni
- Department of Tumor Growth Biology, N.N. Petrov Institute of Oncology, Saint-Petersburg, Russia
| | - E Kh Bakaeva
- Department of Tumor Growth Biology, N.N. Petrov Institute of Oncology, Saint-Petersburg, Russia
| | - O A Gorustovich
- Department of Obstetrics and Gynecology, Grodno State Medical University, Grodno, Belarus
| | - I V Bizin
- Department of Tumor Growth Biology, N.N. Petrov Institute of Oncology, Saint-Petersburg, Russia
| | - E N Imyanitov
- Department of Tumor Growth Biology, N.N. Petrov Institute of Oncology, Saint-Petersburg, Russia.,Department of Medical Genetics, St.-Petersburg Pediatric Medical University, Saint-Petersburg, Russia.,Department of Oncology, I.I. Mechnikov North-Western Medical University, St.-Petersburg, Russia
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Qin Z, Huang T, Guo M, Wang SM. Distinct landscapes of deleterious variants in DNA damage repair system in ethnic human populations. Life Sci Alliance 2022; 5:5/9/e202101319. [PMID: 35595529 PMCID: PMC9122833 DOI: 10.26508/lsa.202101319] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2021] [Revised: 05/11/2022] [Accepted: 05/11/2022] [Indexed: 12/03/2022] Open
Abstract
Deleterious variants in the DNA damage repair system can cause genome instability and increase cancer risk. The highly ethnic-specific DDR deleterious variation from this study suggests its potential relationship with different disease susceptibility in ethnic human populations. Deleterious variants in DNA damage repair (DDR) system can cause genome instability and increase cancer risk. In this study, we analyzed the deleterious variants in DDR system in 16 ethnic human populations. From the genetic variants in 169 DDR genes involved in nine DDR pathways collected from 158,612 individuals of different ethnic background, we identified 1,781 deleterious variants in 81 DDR genes in eight DDR pathways (https://genemutation.fhs.um.edu.mo/dbddr-global/). Our analysis showed although the quantity of deleterious variants was loaded at a similar level, the landscape of the variants differed substantially among different populations that two-third of the variants were present in single ethnic populations, and the rest was mostly shared between the populations with closer geographic and genetic relationship. The highly ethnic-specific DDR deleterious variation suggests its potential relationship with different disease susceptibility in ethnic human populations.
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Affiliation(s)
- Zixin Qin
- Cancer Centre and Institute of Translational Medicine, Ministry of Education Frontiers Science Center for Precision Oncology, Faculty of Health Sciences, University of Macau, Macau, China
| | - Teng Huang
- Cancer Centre and Institute of Translational Medicine, Ministry of Education Frontiers Science Center for Precision Oncology, Faculty of Health Sciences, University of Macau, Macau, China
| | - Maoni Guo
- Cancer Centre and Institute of Translational Medicine, Ministry of Education Frontiers Science Center for Precision Oncology, Faculty of Health Sciences, University of Macau, Macau, China
| | - San Ming Wang
- Cancer Centre and Institute of Translational Medicine, Ministry of Education Frontiers Science Center for Precision Oncology, Faculty of Health Sciences, University of Macau, Macau, China
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Noë M, Hong SM, Wood LD, Thompson ED, Roberts NJ, Goggins MG, Klein AP, Eshleman JR, Kern SE, Hruban RH. Pancreatic cancer pathology viewed in the light of evolution. Cancer Metastasis Rev 2021; 40:661-674. [PMID: 33555482 PMCID: PMC8556193 DOI: 10.1007/s10555-020-09953-z] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/09/2020] [Accepted: 12/30/2020] [Indexed: 12/14/2022]
Abstract
One way to understand ductal adenocarcinoma of the pancreas (pancreatic cancer) is to view it as unimaginably large numbers of evolving living organisms interacting with their environment. This “evolutionary view” creates both expected and surprising perspectives in all stages of neoplastic progression. Advances in the field will require greater attention to this critical evolutionary prospective.
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Affiliation(s)
- Michaël Noë
- Sol Goldman Pancreatic Cancer Research Center, Department of Pathology, The Johns Hopkins University School of Medicine, Carnegie 415, 600 North Wolfe Street, Baltimore, MD, 21287, USA
- Sol Goldman Pancreatic Cancer Research Center, Department of Oncology, The Johns Hopkins University School of Medicine, Baltimore, MD, 21287, USA
| | - Seung-Mo Hong
- Department of Pathology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea
| | - Laura D Wood
- Sol Goldman Pancreatic Cancer Research Center, Department of Pathology, The Johns Hopkins University School of Medicine, Carnegie 415, 600 North Wolfe Street, Baltimore, MD, 21287, USA
- Sol Goldman Pancreatic Cancer Research Center, Department of Oncology, The Johns Hopkins University School of Medicine, Baltimore, MD, 21287, USA
| | - Elizabeth D Thompson
- Sol Goldman Pancreatic Cancer Research Center, Department of Pathology, The Johns Hopkins University School of Medicine, Carnegie 415, 600 North Wolfe Street, Baltimore, MD, 21287, USA
| | - Nicholas J Roberts
- Sol Goldman Pancreatic Cancer Research Center, Department of Pathology, The Johns Hopkins University School of Medicine, Carnegie 415, 600 North Wolfe Street, Baltimore, MD, 21287, USA
- Sol Goldman Pancreatic Cancer Research Center, Department of Oncology, The Johns Hopkins University School of Medicine, Baltimore, MD, 21287, USA
| | - Michael G Goggins
- Sol Goldman Pancreatic Cancer Research Center, Department of Pathology, The Johns Hopkins University School of Medicine, Carnegie 415, 600 North Wolfe Street, Baltimore, MD, 21287, USA
- Sol Goldman Pancreatic Cancer Research Center, Department of Oncology, The Johns Hopkins University School of Medicine, Baltimore, MD, 21287, USA
- Sol Goldman Pancreatic Cancer Research Center, Department of Medicine, The Johns Hopkins University School of Medicine, Baltimore, MD, 21287, USA
| | - Alison P Klein
- Sol Goldman Pancreatic Cancer Research Center, Department of Pathology, The Johns Hopkins University School of Medicine, Carnegie 415, 600 North Wolfe Street, Baltimore, MD, 21287, USA
- Sol Goldman Pancreatic Cancer Research Center, Department of Oncology, The Johns Hopkins University School of Medicine, Baltimore, MD, 21287, USA
- Department of Epidemiology, Bloomberg School of Public Health, The Johns Hopkins University School of Medicine, Baltimore, MD, 21231, USA
| | - James R Eshleman
- Sol Goldman Pancreatic Cancer Research Center, Department of Pathology, The Johns Hopkins University School of Medicine, Carnegie 415, 600 North Wolfe Street, Baltimore, MD, 21287, USA
- Sol Goldman Pancreatic Cancer Research Center, Department of Oncology, The Johns Hopkins University School of Medicine, Baltimore, MD, 21287, USA
| | - Scott E Kern
- Sol Goldman Pancreatic Cancer Research Center, Department of Pathology, The Johns Hopkins University School of Medicine, Carnegie 415, 600 North Wolfe Street, Baltimore, MD, 21287, USA
- Sol Goldman Pancreatic Cancer Research Center, Department of Oncology, The Johns Hopkins University School of Medicine, Baltimore, MD, 21287, USA
| | - Ralph H Hruban
- Sol Goldman Pancreatic Cancer Research Center, Department of Pathology, The Johns Hopkins University School of Medicine, Carnegie 415, 600 North Wolfe Street, Baltimore, MD, 21287, USA.
- Sol Goldman Pancreatic Cancer Research Center, Department of Oncology, The Johns Hopkins University School of Medicine, Baltimore, MD, 21287, USA.
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Constitutional mosaicism for a BRCA2 mutation as a cause of early-onset breast cancer. Fam Cancer 2020; 19:307-310. [PMID: 32468491 PMCID: PMC7497290 DOI: 10.1007/s10689-020-00186-1] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2020] [Accepted: 05/18/2020] [Indexed: 11/02/2022]
Abstract
Germline mutations in the BRCA1 and BRCA2 genes cause hereditary breast and ovarian cancer syndrome (HBOC). Mutations in these genes are usually inherited, and reports of de novo BRCA1/2 mutations are rare. To date, only one patient with low-level BRCA1 mutation mosaicism has been published. We report on a breast cancer patient with constitutional somatic mosaicism of a BRCA2 mutation. BRCA2 mutation c.9294C>G, p.(Tyr3098Ter) was detected in 20% of reads in DNA extracted from peripheral blood using next-generation sequencing (NGS). The BRCA2 mutation was subsequently observed at similar levels in normal breast tissue, adipose tissue, normal right fallopian tube tissue and ovaries of the patient, suggesting that this mutation occurred early in embryonic development. This is the first case to report constitutional mosaicism for a BRCA2 mutation and shows that BRCA2 mosaicism can underlie early-onset breast cancer. NGS for BRCA1/2 should be considered for patients whose tumors harbor a BRCA1/2 mutation and for individuals suggestive of genetic predisposition but without a family history of HBO.
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7
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Meng H, Yao L, Yuan H, Xu Y, Ouyang T, Li J, Wang T, Fan Z, Fan T, Lin B, Xie Y. BRCA1 c.5470_5477del, a founder mutation in Chinese Han breast cancer patients. Int J Cancer 2020; 146:3044-3052. [PMID: 31957001 DOI: 10.1002/ijc.32877] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2019] [Revised: 12/20/2019] [Accepted: 01/08/2020] [Indexed: 12/13/2022]
Abstract
The spectrum and frequency of BRCA1/2 pathogenic variants may be ethnicity-specific. Whether high-frequency founder mutations are present in Chinese women remains largely unknown. In the current study, germline pathogenic variants in the BRCA1/2 genes were determined in 9,505 unselected Chinese Han breast cancer (BC) patients by next-generation and/ or Sanger sequencing. Four hundred and seventy-one (5.0%) BC patients carried BRCA1/2 pathogenic variants in this cohort. A total of 25 recurrent pathogenic variants (at least found in four unrelated patients) were identified in this cohort (8 BRCA1 and 17 BRCA2 recurrent pathogenic variants), 161 patients carried one of these recurrent pathogenic variants in this cohort of 9,505 patients. All of these 25 recurrent pathogenic variants were further explored whether they had founder effect through haplotype analysis. The most common pathogenic variant, BRCA1 c.5470_5477del, was found in 30 BC patients from 29 unrelated families. Twenty-seven of these 29 unrelated patients who carried this BRCA1 c.5470_5477del mutation shared an identical haplotype, indicating that BRCA1 c.5470_5477del was a founder mutation in the Chinese Han population. Furthermore, BRCA1 c.5470_5477del mutation carriers had a significantly worse survival than noncarriers (disease-free survival, p = 0.049; overall survival, p = 0.029). Taken together, our data suggested that BRCA1 c.5470_5477del is a founder mutation in the Chinese Han population and BRCA1 c.5470_5477del mutation carriers have a poor survival.
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Affiliation(s)
- Hua Meng
- Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education/Beijing), Breast Center, Peking University Cancer Hospital & Institute, Beijing, People's Republic of China
| | - Lu Yao
- Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education/Beijing), Breast Center, Peking University Cancer Hospital & Institute, Beijing, People's Republic of China
| | - Hua Yuan
- Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education/Beijing), Breast Center, Peking University Cancer Hospital & Institute, Beijing, People's Republic of China
| | - Ye Xu
- Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education/Beijing), Breast Center, Peking University Cancer Hospital & Institute, Beijing, People's Republic of China
| | - Tao Ouyang
- Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education/Beijing), Breast Center, Peking University Cancer Hospital & Institute, Beijing, People's Republic of China
| | - Jinfeng Li
- Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education/Beijing), Breast Center, Peking University Cancer Hospital & Institute, Beijing, People's Republic of China
| | - Tianfeng Wang
- Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education/Beijing), Breast Center, Peking University Cancer Hospital & Institute, Beijing, People's Republic of China
| | - Zhaoqing Fan
- Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education/Beijing), Breast Center, Peking University Cancer Hospital & Institute, Beijing, People's Republic of China
| | - Tie Fan
- Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education/Beijing), Breast Center, Peking University Cancer Hospital & Institute, Beijing, People's Republic of China
| | - Benyao Lin
- Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education/Beijing), Breast Center, Peking University Cancer Hospital & Institute, Beijing, People's Republic of China
| | - Yuntao Xie
- Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education/Beijing), Breast Center, Peking University Cancer Hospital & Institute, Beijing, People's Republic of China
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Sun Y, Li D, Su Y, Zhao H, Pang W, Zhao W, Wu S. Protective effect of hydrogen sulfide is mediated by negative regulation of epigenetic histone acetylation in Parkinson's disease. Arch Med Sci 2020; 19:1124-1135. [PMID: 37560727 PMCID: PMC10408026 DOI: 10.5114/aoms.2020.93121] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/13/2019] [Accepted: 10/14/2019] [Indexed: 08/11/2023] Open
Abstract
INTRODUCTION Derangements in monoaminergic transmission in the substantia nigra with disturbed signaling in the hypothalamic-pituitary-adrenal axis are the major characteristics of Parkinson's disease (PD). It has been reported that the administration of hydrogen sulfide (H2S) is in practice to treat PD because of its redundant nature in regulating various neuronal signals. Hence, the current investigation was performed to evaluate the hypothesis that H2S might exert protective action via the inhibition of epigenetic histone acetylation. MATERIAL AND METHODS To test this notion, 6-hydroxydopamine (6-OHDA) was used to induce PD and sodium hydrogen sulfide (SHS) was used as a H2S donor and tubastatin A (TSA) was tested in an in vivo rat model to delineate the signaling mechanism. RESULTS Induction of PD in rats demonstrated elevated oxidative stress with an evidenced decrease in antioxidant enzymes, while elevated pro-inflammatory cytokines and inflammatory mediators were observed in the striatum of PD rats compared to controls. On the other hand, elevated (p < 0.01) levels of dopamine, 3,4-dihydroxyphenylacetic acid (DOPAC), mRNA transcript of HDAC-2, -3, -4, -6 and total histone deacetylase (HDAC) were found with reduced levels of histone acetyltransferase (HAT) in the brain tissues of PD induced rats. CONCLUSIONS Diversely, H2S exposure reversed these alterations with reduced HDAC activity. Further, PD rats treated with HDAC inhibitor showed a dramatic upsurge in the level of tyrosine hydroxylase, with a decreased level of glial fibrillary acidic protein, α-synuclein, tumor necrosis factor α, and other cytokines. Thus the results of the study suggest that H2S exerts protection via inhibition of HDAC.
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Affiliation(s)
- Yang Sun
- Department of Rehabilitation Medicine, The Second Affiliated Hospital of Xi’an Medical University, Xi’an, Shaanxi, China
| | - Dai Li
- Department of Anesthesiology, Chang Hai Hospital, Naval Military Medical University, Shanghai, China
| | - Yuqiang Su
- Department of Anesthesiology, The Second Affiliated Hospital of Xi’an Medical University, Xi’an, Shaanxi, China
| | - Haikang Zhao
- Department of Neurosurgery, The Second Affiliated Hospital of Xi’an Medical University, Xi’an, Shaanxi, China
| | - Weiwei Pang
- Department of Rehabilitation Medicine, The Second Affiliated Hospital of Xi’an Medical University, Xi’an, Shaanxi, China
| | - Wei Zhao
- Department of Rehabilitation Medicine, The Second Affiliated Hospital of Xi’an Medical University, Xi’an, Shaanxi, China
| | - Shengjun Wu
- Department of Gynecology, The Second Affiliated Hospital of Xi’an Medical University, Xi’an, Shaanxi, China
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Abul-Husn NS, Soper ER, Odgis JA, Cullina S, Bobo D, Moscati A, Rodriguez JE, Loos RJF, Cho JH, Belbin GM, Suckiel SA, Kenny EE. Exome sequencing reveals a high prevalence of BRCA1 and BRCA2 founder variants in a diverse population-based biobank. Genome Med 2019; 12:2. [PMID: 31892343 PMCID: PMC6938627 DOI: 10.1186/s13073-019-0691-1] [Citation(s) in RCA: 55] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2019] [Accepted: 11/13/2019] [Indexed: 01/07/2023] Open
Abstract
BACKGROUND Pathogenic variants in BRCA1 and BRCA2 (BRCA1/2) lead to increased risk of breast, ovarian, and other cancers, but most variant-positive individuals in the general population are unaware of their risk, and little is known about prevalence in non-European populations. We investigated BRCA1/2 prevalence and impact in the electronic health record (EHR)-linked BioMe Biobank in New York City. METHODS Exome sequence data from 30,223 adult BioMe participants were evaluated for pathogenic variants in BRCA1/2. Prevalence estimates were made in population groups defined by genetic ancestry and self-report. EHR data were used to evaluate clinical characteristics of variant-positive individuals. RESULTS There were 218 (0.7%) individuals harboring expected pathogenic variants, resulting in an overall prevalence of 1 in 139. The highest prevalence was in individuals with Ashkenazi Jewish (AJ; 1 in 49), Filipino and other Southeast Asian (1 in 81), and non-AJ European (1 in 103) ancestry. Among 218 variant-positive individuals, 112 (51.4%) harbored known founder variants: 80 had AJ founder variants (BRCA1 c.5266dupC and c.68_69delAG, and BRCA2 c.5946delT), 8 had a Puerto Rican founder variant (BRCA2 c.3922G>T), and 24 had one of 19 other founder variants. Non-European populations were more likely to harbor BRCA1/2 variants that were not classified in ClinVar or that had uncertain or conflicting evidence for pathogenicity (uncertain/conflicting). Within mixed ancestry populations, such as Hispanic/Latinos with genetic ancestry from Africa, Europe, and the Americas, there was a strong correlation between the proportion of African genetic ancestry and the likelihood of harboring an uncertain/conflicting variant. Approximately 28% of variant-positive individuals had a personal history, and 45% had a personal or family history of BRCA1/2-associated cancers. Approximately 27% of variant-positive individuals had prior clinical genetic testing for BRCA1/2. However, individuals with AJ founder variants were twice as likely to have had a clinical test (39%) than those with other pathogenic variants (20%). CONCLUSIONS These findings deepen our knowledge about BRCA1/2 variants and associated cancer risk in diverse populations, indicate a gap in knowledge about potential cancer-related variants in non-European populations, and suggest that genomic screening in diverse patient populations may be an effective tool to identify at-risk individuals.
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Affiliation(s)
- Noura S Abul-Husn
- The Center for Genomic Health, Icahn School of Medicine at Mount Sinai, New York, NY, USA.
- The Charles Bronfman Institute for Personalized Medicine, Icahn School of Medicine at Mount Sinai, New York, NY, USA.
- Department of Medicine, Icahn School of Medicine at Mount Sinai, New York, NY, USA.
- Department of Genetics and Genomic Sciences, Icahn School of Medicine at Mount Sinai, New York, NY, USA.
| | - Emily R Soper
- The Center for Genomic Health, Icahn School of Medicine at Mount Sinai, New York, NY, USA
- The Charles Bronfman Institute for Personalized Medicine, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Jacqueline A Odgis
- The Center for Genomic Health, Icahn School of Medicine at Mount Sinai, New York, NY, USA
- The Charles Bronfman Institute for Personalized Medicine, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Sinead Cullina
- The Center for Genomic Health, Icahn School of Medicine at Mount Sinai, New York, NY, USA
- The Charles Bronfman Institute for Personalized Medicine, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Dean Bobo
- The Center for Genomic Health, Icahn School of Medicine at Mount Sinai, New York, NY, USA
- The Charles Bronfman Institute for Personalized Medicine, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Arden Moscati
- The Center for Genomic Health, Icahn School of Medicine at Mount Sinai, New York, NY, USA
- The Charles Bronfman Institute for Personalized Medicine, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Jessica E Rodriguez
- The Center for Genomic Health, Icahn School of Medicine at Mount Sinai, New York, NY, USA
- The Charles Bronfman Institute for Personalized Medicine, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Ruth J F Loos
- The Charles Bronfman Institute for Personalized Medicine, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Judy H Cho
- The Charles Bronfman Institute for Personalized Medicine, Icahn School of Medicine at Mount Sinai, New York, NY, USA
- Department of Medicine, Icahn School of Medicine at Mount Sinai, New York, NY, USA
- Department of Genetics and Genomic Sciences, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Gillian M Belbin
- The Center for Genomic Health, Icahn School of Medicine at Mount Sinai, New York, NY, USA
- The Charles Bronfman Institute for Personalized Medicine, Icahn School of Medicine at Mount Sinai, New York, NY, USA
- Department of Medicine, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Sabrina A Suckiel
- The Center for Genomic Health, Icahn School of Medicine at Mount Sinai, New York, NY, USA
- The Charles Bronfman Institute for Personalized Medicine, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Eimear E Kenny
- The Center for Genomic Health, Icahn School of Medicine at Mount Sinai, New York, NY, USA
- The Charles Bronfman Institute for Personalized Medicine, Icahn School of Medicine at Mount Sinai, New York, NY, USA
- Department of Medicine, Icahn School of Medicine at Mount Sinai, New York, NY, USA
- Department of Genetics and Genomic Sciences, Icahn School of Medicine at Mount Sinai, New York, NY, USA
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Huszno J, Fiszer-Kierzkowska A, Pigłowski W, Mazur M. BRCA2 genemutation, c.2808_2811delACAA (p.Ala938Profs), in malebreastcancer - clinicopathologicalanalysisbased on a case report. PRZEGLAD MENOPAUZALNY = MENOPAUSE REVIEW 2019; 18:227-229. [PMID: 32132887 PMCID: PMC7045353 DOI: 10.5114/pm.2019.93120] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 08/05/2019] [Accepted: 11/25/2019] [Indexed: 11/17/2022]
Abstract
Male breast cancer (MBC) is a rare disease that occurs in ~0.2% of all neoplasms among men. The risk of developing MBC is higher in men with a BRCA2 genetic mutation (7%). The aim of this study was to evaluate the association between c.2808_2811del ACAA (p.Ala938Profs) BRCA2 mutation in MBC and clinicopathological factors. A 75-year-old patient was admitted to the Genetic Outpatient Clinic with a diagnosis of right breast cancer and with a family history of cancer (two daughters who were diagnosed with breast cancer at ages 46 and 38 years). Postoperative histopathological examination revealed tumor type pT2 N1a Mx, NST NG-3 G-3, Ki-67 (75%), HER2 (+), ER (+++), PR (+++), invasive carcinoma and luminal B subtype. The complete coding sequences of the BRCA1 and BRCA2 genes were analyzed for genomic DNA material using next generation sequencing on the Ion Torrent platform. The c.2808_2811delACAA (p.Ala938Profs) mutation was observed in the BRCA2 gene. The presence of the c.2808_2811delACAA (p.Ala938Profs) mutation in the BRCA2 gene was confirmed using the Sanger method. The same BRCA2 gene mutation was reported in one of the patient's daughters. The detected mutation causes the frameshift mutation, resulting in the creation of an additional translation termination codon and the synthesis of an abnormal protein. This mutation was associated with a later age of disease, a higher histological degree, a higher mitotic index, a positive steroid receptor status and the luminal B subtype HER2- breast cancer.
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Affiliation(s)
- Joanna Huszno
- Clinical and ExperimentalOncologyDepartment, Maria Skłodowska-Curie MemorialCancer Center and Institute of Oncology, Gliwice Branch, Gliwice, Poland
| | - Anna Fiszer-Kierzkowska
- Center for TranslationalResearch and MolecularBiology of Cancer, Maria Skłodowska-Curie MemorialCancer Center and Institute of Oncology, Gliwice Branch, Gliwice, Poland
| | - Wojciech Pigłowski
- Center for TranslationalResearch and MolecularBiology of Cancer, Maria Skłodowska-Curie MemorialCancer Center and Institute of Oncology, Gliwice Branch, Gliwice, Poland
| | - Magdalena Mazur
- Center for TranslationalResearch and MolecularBiology of Cancer, Maria Skłodowska-Curie MemorialCancer Center and Institute of Oncology, Gliwice Branch, Gliwice, Poland
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11
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Novel BRCA2 pathogenic variant c.5219 T > G; p.(Leu1740Ter) in a consanguineous Senegalese family with hereditary breast cancer. BMC MEDICAL GENETICS 2019; 20:73. [PMID: 31060517 PMCID: PMC6501405 DOI: 10.1186/s12881-019-0814-y] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/08/2018] [Accepted: 04/24/2019] [Indexed: 01/07/2023]
Abstract
Background Pathogenic variants associated with hereditary breast cancer have been reported for BRCA1 and BRCA2 (BRCA1/2) genes in patients from multiple ethnicities, but limited information is available from sub-Saharan African populations. We report a BRCA2 pathogenic variant in a Senegalese family with hereditary breast cancer. Methods An index case from a consanguineous family and nineteen healthy female relatives were recruited after informed consent. Along with this family, 14 other index cases with family history of breast cancer were also recruited. For the control populations we recruited 48 healthy women with no cancer diagnosis and 48 women diagnosed with sporadic breast cancer without family history. Genomic DNA was extracted from peripheral blood. All BRCA2 exons were amplified by PCR and sequenced. Sequences were compared to the BRCA2 GenBank reference sequence (NM_000059.3) using Alamut Software. Results We identified a novel nonsense pathogenic variant c.5219 T > G; p.(Leu1740Ter) in exon 11 of BRCA2 in the index case. The pathogenic variant was also identified in three sisters and one daughter, but was absent in the controls and unrelated cases. Conclusions This is the first report of a novel BRCA2 pathogenic variant in a Senegalese family with hereditary breast cancer. This result confirms the diversity of hereditary breast cancer pathogenic variants across populations and extends our knowledge of genetic susceptibility to breast cancer in Africa. Electronic supplementary material The online version of this article (10.1186/s12881-019-0814-y) contains supplementary material, which is available to authorized users.
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12
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Adaniel C, Salinas F, Donaire JM, Bravo ME, Peralta O, Paredes H, Aliaga N, Sola A, Neira P, Behnke C, Rodriguez T, Torres S, Lopez F, Hurtado C. Non- BRCA1/2 Variants Detected in a High-Risk Chilean Cohort With a History of Breast and/or Ovarian Cancer. J Glob Oncol 2019; 5:1-14. [PMID: 31125277 PMCID: PMC6550094 DOI: 10.1200/jgo.18.00163] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/19/2019] [Indexed: 12/13/2022] Open
Abstract
METHODS Data were retrospectively collected from the registry of the High-Risk Breast and Ovarian Cancer Program at Clínica Las Condes, Santiago, Chile. Data captured included index case diagnosis, ancestry, family history, and genetic test results. RESULTS Three hundred fifteen individuals underwent genetic testing during the study period. The frequency of germline pathogenic and likely pathogenic variants in a breast or ovarian cancer predisposition gene was 20.3%. Of those patients who underwent testing with a panel of both high- and moderate-penetrance genes, 10.5% were found to have pathogenic or likely pathogenic variants in non-BRCA1/2 genes. CONCLUSION Testing for non-BRCA1 and -2 mutations may be clinically relevant for individuals who are suspected to have a hereditary breast or ovarian cancer syndrome in Chile. Comprehensive genetic testing of individuals who are at high risk is necessary to further characterize the genetic susceptibility to cancer in Chile.
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Affiliation(s)
- Christina Adaniel
- Programa de Alto Riesgo de Cáncer de Mama y Ovario, Clínica Las Condes, Santiago, Chile
| | - Francisca Salinas
- Programa de Alto Riesgo de Cáncer de Mama y Ovario, Clínica Las Condes, Santiago, Chile
| | - Juan Manuel Donaire
- Programa de Alto Riesgo de Cáncer de Mama y Ovario, Clínica Las Condes, Santiago, Chile
| | - Maria Eugenia Bravo
- Programa de Alto Riesgo de Cáncer de Mama y Ovario, Clínica Las Condes, Santiago, Chile
| | - Octavio Peralta
- Programa de Alto Riesgo de Cáncer de Mama y Ovario, Clínica Las Condes, Santiago, Chile
| | - Hernando Paredes
- Programa de Alto Riesgo de Cáncer de Mama y Ovario, Clínica Las Condes, Santiago, Chile
| | - Nuvia Aliaga
- Programa de Alto Riesgo de Cáncer de Mama y Ovario, Clínica Las Condes, Santiago, Chile
| | - Antonio Sola
- Programa de Alto Riesgo de Cáncer de Mama y Ovario, Clínica Las Condes, Santiago, Chile
| | - Paulina Neira
- Programa de Alto Riesgo de Cáncer de Mama y Ovario, Clínica Las Condes, Santiago, Chile
| | - Carolina Behnke
- Programa de Alto Riesgo de Cáncer de Mama y Ovario, Clínica Las Condes, Santiago, Chile
| | - Tulio Rodriguez
- Programa de Alto Riesgo de Cáncer de Mama y Ovario, Clínica Las Condes, Santiago, Chile
| | - Soledad Torres
- Programa de Alto Riesgo de Cáncer de Mama y Ovario, Clínica Las Condes, Santiago, Chile
| | - Francisco Lopez
- Programa de Alto Riesgo de Cáncer de Mama y Ovario, Clínica Las Condes, Santiago, Chile
| | - Claudia Hurtado
- Programa de Alto Riesgo de Cáncer de Mama y Ovario, Clínica Las Condes, Santiago, Chile
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13
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Germline Missense Variants in BRCA1: New Trends and Challenges for Clinical Annotation. Cancers (Basel) 2019; 11:cancers11040522. [PMID: 31013702 PMCID: PMC6520942 DOI: 10.3390/cancers11040522] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2019] [Revised: 03/13/2019] [Accepted: 03/30/2019] [Indexed: 12/24/2022] Open
Abstract
Genetic testing allows for the identification of germline DNA variations, which are associated with a significant increase in the risk of developing breast cancer (BC) and ovarian cancer (OC). Detection of a BRCA1 or BRCA2 pathogenic variant triggers several clinical management actions, which may include increased surveillance and prophylactic surgery for healthy carriers or treatment with the PARP inhibitor therapy for carriers diagnosed with cancer. Thus, standardized validated criteria for the annotation of BRCA1 and BRCA2 variants according to their pathogenicity are necessary to support clinical decision-making and ensure improved outcomes. Upon detection, variants whose pathogenicity can be inferred by the genetic code are typically classified as pathogenic, likely pathogenic, likely benign, or benign. Variants whose impact on function cannot be directly inferred by the genetic code are labeled as variants of uncertain clinical significance (VUS) and are evaluated by multifactorial likelihood models that use personal and family history of cancer, segregation data, prediction tools, and co-occurrence with a pathogenic BRCA variant. Missense variants, coding alterations that replace a single amino acid residue with another, are a class of variants for which determination of clinical relevance is particularly challenging. Here, we discuss current issues in the missense variant classification by following a typical life cycle of a BRCA1 missense variant through detection, annotation and information dissemination. Advances in massively parallel sequencing have led to a substantial increase in VUS findings. Although the comprehensive assessment and classification of missense variants according to their pathogenicity remains the bottleneck, new developments in functional analysis, high throughput assays, data sharing, and statistical models are rapidly changing this scenario.
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14
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Rebbeck TR, Friebel TM, Friedman E, Hamann U, Huo D, Kwong A, Olah E, Olopade OI, Solano AR, Teo SH, Thomassen M, Weitzel JN, Chan TL, Couch FJ, Goldgar DE, Kruse TA, Palmero EI, Park SK, Torres D, van Rensburg EJ, McGuffog L, Parsons MT, Leslie G, Aalfs CM, Abugattas J, Adlard J, Agata S, Aittomäki K, Andrews L, Andrulis IL, Arason A, Arnold N, Arun BK, Asseryanis E, Auerbach L, Azzollini J, Balmaña J, Barile M, Barkardottir RB, Barrowdale D, Benitez J, Berger A, Berger R, Blanco AM, Blazer KR, Blok MJ, Bonadona V, Bonanni B, Bradbury AR, Brewer C, Buecher B, Buys SS, Caldes T, Caliebe A, Caligo MA, Campbell I, Caputo S, Chiquette J, Chung WK, Claes KB, Collée JM, Cook J, Davidson R, de la Hoya M, De Leeneer K, de Pauw A, Delnatte C, Diez O, Ding YC, Ditsch N, Domchek SM, Dorfling CM, Velazquez C, Dworniczak B, Eason J, Easton DF, Eeles R, Ehrencrona H, Ejlertsen B, Engel C, Engert S, Evans DG, Faivre L, Feliubadaló L, Ferrer SF, Foretova L, Fowler J, Frost D, Galvão HCR, Ganz PA, Garber J, Gauthier-Villars M, Gehrig A, Gerdes AM, Gesta P, Giannini G, Giraud S, Glendon G, Godwin AK, Greene MH, Gronwald J, Gutierrez-Barrera A, Hahnen E, Hauke J, Henderson A, Hentschel J, Hogervorst FB, Honisch E, Imyanitov EN, Isaacs C, Izatt L, Izquierdo A, Jakubowska A, James P, Janavicius R, Jensen UB, John EM, Joseph V, Kaczmarek K, Karlan BY, Kast K, Kim SW, Konstantopoulou I, Korach J, Laitman Y, Lasa A, Lasset C, Lázaro C, Lee A, Lee MH, Lester J, Lesueur F, Liljegren A, Lindor NM, Longy M, Loud JT, Lu KH, Lubinski J, Machackova E, Manoukian S, Mari V, Martínez-Bouzas C, Matrai Z, Mebirouk N, Meijers-Heijboer HE, Meindl A, Mensenkamp AR, Mickys U, Miller A, Montagna M, Moysich KB, Mulligan AM, Musinsky J, Neuhausen SL, Nevanlinna H, Ngeow J, Nguyen HP, Niederacher D, Nielsen HR, Nielsen FC, Nussbaum RL, Offit K, Öfverholm A, Ong KR, Osorio A, Papi L, Papp J, Pasini B, Pedersen IS, Peixoto A, Peruga N, Peterlongo P, Pohl E, Pradhan N, Prajzendanc K, Prieur F, Pujol P, Radice P, Ramus SJ, Rantala J, Rashid MU, Rhiem K, Robson M, Rodriguez GC, Rogers MT, Rudaitis V, Schmidt AY, Schmutzler RK, Senter L, Shah PD, Sharma P, Side LE, Simard J, Singer CF, Skytte AB, Slavin TP, Snape K, Sobol H, Southey M, Steele L, Steinemann D, Sukiennicki G, Sutter C, Szabo CI, Tan YY, Teixeira MR, Terry MB, Teulé A, Thomas A, Thull DL, Tischkowitz M, Tognazzo S, Toland AE, Topka S, Trainer AH, Tung N, van Asperen CJ, van der Hout AH, van der Kolk LE, van der Luijt RB, Van Heetvelde M, Varesco L, Varon-Mateeva R, Vega A, Villarreal-Garza C, von Wachenfeldt A, Walker L, Wang-Gohrke S, Wappenschmidt B, Weber BHF, Yannoukakos D, Yoon SY, Zanzottera C, Zidan J, Zorn KK, Hutten Selkirk CG, Hulick PJ, Chenevix-Trench G, Spurdle AB, Antoniou AC, Nathanson KL. Mutational spectrum in a worldwide study of 29,700 families with BRCA1 or BRCA2 mutations. Hum Mutat 2018; 39:593-620. [PMID: 29446198 PMCID: PMC5903938 DOI: 10.1002/humu.23406] [Citation(s) in RCA: 198] [Impact Index Per Article: 33.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2017] [Revised: 01/09/2018] [Accepted: 01/19/2018] [Indexed: 01/19/2023]
Abstract
The prevalence and spectrum of germline mutations in BRCA1 and BRCA2 have been reported in single populations, with the majority of reports focused on White in Europe and North America. The Consortium of Investigators of Modifiers of BRCA1/2 (CIMBA) has assembled data on 18,435 families with BRCA1 mutations and 11,351 families with BRCA2 mutations ascertained from 69 centers in 49 countries on six continents. This study comprehensively describes the characteristics of the 1,650 unique BRCA1 and 1,731 unique BRCA2 deleterious (disease-associated) mutations identified in the CIMBA database. We observed substantial variation in mutation type and frequency by geographical region and race/ethnicity. In addition to known founder mutations, mutations of relatively high frequency were identified in specific racial/ethnic or geographic groups that may reflect founder mutations and which could be used in targeted (panel) first pass genotyping for specific populations. Knowledge of the population-specific mutational spectrum in BRCA1 and BRCA2 could inform efficient strategies for genetic testing and may justify a more broad-based oncogenetic testing in some populations.
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Affiliation(s)
- Timothy R. Rebbeck
- Harvard TH Chan School of Public Health and Dana Farber Cancer Institute, 1101 Dana Building, 450 Brookline Ave, Boston, MA 02215, USA
| | - Tara M. Friebel
- Harvard TH Chan School of Public Health and Dana Farber Cancer Institute, 1101 Dana Building, 450 Brookline Ave, Boston, MA 02215, USA
| | - Eitan Friedman
- The Susanne Levy Gertner Oncogenetics Unit, Institute of Human Genetics, Chaim Sheba Medical Center, Ramat Gan 52621, and the Sackler School of Medicine, Tel-Aviv University, Tel-Aviv, Israel
| | - Ute Hamann
- Molecular Genetics of Breast Cancer, German Cancer Research Center (DKFZ), Im Neuenheimer Feld 580, 69120 Heidelberg, Germany
| | - Dezheng Huo
- 5841 South Maryland Avenue, MC 2115 Chicago, IL, USA
| | - Ava Kwong
- The Hong Kong Hereditary Breast Cancer Family Registry, Cancer Genetics Center, Hong Kong Sanatorium and Hospital, Hong Kong
| | - Edith Olah
- Department of Molecular Genetics, National Institute of Oncology, Budapest, Hungary
| | | | - Angela R. Solano
- INBIOMED, Faculty of Medicine, University of Buenos Aires/CONICET and CEMIC, Department of Clinical Chemistry, Medical Direction, Buenos Aires, Paraguay 2155, C1121ABG, Argentina
| | - Soo-Hwang Teo
- Cancer Research Initiatives Foundation, Sime Darby Medical Centre, 1 Jalan SS12/1A, Subang Jaya, 47500, Malaysia
| | - Mads Thomassen
- Department of Clinical Genetics, Odense University Hospital, Sonder Boulevard 29, Odense C, Denmark
| | - Jeffrey N. Weitzel
- Clinical Cancer Genetics, City of Hope, 1500 East Duarte Road, Duarte, California 91010 USA
| | - TL Chan
- Division of Molecular Pathology, Department of Pathology, Hong Kong Sanatorium & Hospital, 1/F Li Shu Fan Block, 2 Village Road, Happy Valley, Hong Kong
| | - Fergus J. Couch
- Department of Laboratory Medicine and Pathology, and Health Sciences Research, Mayo Clinic, 200 First Street SW, Rochester, Minnesota, USA
| | - David E. Goldgar
- Department of Dermatology, University of Utah School of Medicine, 30 North 1900 East, SOM 4B454, Salt Lake City, UT 84132, USA
| | - Torben A. Kruse
- Department of Clinical Genetics, Odense University Hospital, Sonder Boulevard 29, Odense C, Denmark
| | - Edenir Inêz Palmero
- Molecular Oncology Research Center, Barretos Cancer Hospital, Barretos, São Paulo, Brazil
| | - Sue Kyung Park
- 1) Department of Preventive Medicine, Seoul National University College of Medicine; 2) Department of Biomedical Science, Seoul National University Graduate School; 3) Cancer Research Center, Seoul National University, 103 Daehak-ro, Jongno-gu, Seoul, Korea
| | - Diana Torres
- Molecular Genetics of Breast Cancer, German Cancer Research Center (DKFZ), Im Neuenheimer Feld 580, 69120 Heidelberg, Germany
- Institute of Human Genetics, Pontificia Universidad Javeriana, Carrera 7, Bogota, 11001000, Colombia
| | - Elizabeth J. van Rensburg
- Cancer Genetics Laboratory, Department of Genetics, University of Pretoria, Private Bag X323, Arcadia 0007, South Africa
| | - Lesley McGuffog
- Centre for Cancer Genetic Epidemiology, Department of Public Health and Primary Care, University of Cambridge, Strangeways Research Laboratory, Worts Causeway, Cambridge, UK
| | - Michael T. Parsons
- Genetics and Computational Biology Department, QIMR Berghofer Medical Research Institute, Herston Road, Brisbane, QLD 4006, Australia
| | - Goska Leslie
- Centre for Cancer Genetic Epidemiology, Department of Public Health and Primary Care, University of Cambridge, Strangeways Research Laboratory, Worts Causeway, Cambridge, UK
| | - Cora M. Aalfs
- Department of Clinical Genetics, Academic Medical Center, P.O. Box 22700, 1100 DE Amsterdam, The Netherlands
| | - Julio Abugattas
- City of Hope Clinical Cancer Genomics Community Research Network, 1500 East Duarte Road, Duarte, CA 91010, USA
| | - Julian Adlard
- Yorkshire Regional Genetics Service, Chapel Allerton Hospital, Leeds, UK
| | - Simona Agata
- Immunology and Molecular Oncology Unit, Veneto Institute of Oncology IOV - IRCCS, Via Gattamelata 64, Padua, Italy
| | - Kristiina Aittomäki
- Department of Clinical Genetics, Helsinki University Hospital, P.O. BOX 160 (Meilahdentie 2), 00029 HUS, Finland
| | - Lesley Andrews
- Hereditary Cancer Clinic, Prince of Wales Hospital, High Street, Randwick, NSW 2031 Australia
| | - Irene L. Andrulis
- Lunenfeld-Tanenbaum Research Institute, Sinai Health System, Toronto, Ontario M5G 1X5, Canada; Department of Molecular Genetics, University of Toronto, Toronto, Ontario
| | - Adalgeir Arason
- Department of Pathology, hus 9, Landspitali-LSH v/Hringbraut, 101 Reykjavik, Iceland
| | - Norbert Arnold
- Department of Gynaecology and Obstetrics, University Hospital of Schleswig-Holstein, Campus Kiel, Christian-Albrechts University Kiel, Germany
| | - Banu K. Arun
- Department of Breast Medical Oncology and Clinical Cancer Genetics Program, University Of Texas MD Anderson Cancer Center, 1515 Pressler Street, CBP 5, Houston, TX, USA
| | - Ella Asseryanis
- Dept of OB/GYN and Comprehensive Cancer Center, Medical University of Vienna, Vienna, Austria, Waehringer Guertel 18-20, A 1090 Vienna, Austria
| | - Leo Auerbach
- Dept of OB/GYN and Comprehensive Cancer Center, Medical University of Vienna, Vienna, Austria, Waehringer Guertel 18-20, A 1090 Vienna, Austria
| | - Jacopo Azzollini
- Unit of Medical Genetics, Department of Medical Oncology and Hematology, Fondazione IRCCS (Istituto Di Ricovero e Cura a Carattere Scientifico) Instituto Nazionale Tumori (INT), Via Giacomo Venezian 1, 20133 Milan, Italy
| | - Judith Balmaña
- Department of Medical Oncology. University Hospital, Vall d'Hebron, Barcelona, Spain
| | - Monica Barile
- Division of Cancer Prevention and Genetics, Istituto Europeo di Oncologia (IEO), via Ripamonti 435, 20141 Milan, Italy
| | - Rosa B. Barkardottir
- Laboratory of Cell Biology, Department of Pathology, hus 9, Landspitali-LSH v/Hringbraut, 101 Reykjavik, Iceland and BMC (Biomedical Centre), Faculty of Medicine, University of Iceland, Vatnsmyrarvegi 16, 101 Reykjavik, Iceland
| | - Daniel Barrowdale
- Centre for Cancer Genetic Epidemiology, Department of Public Health and Primary Care, University of Cambridge, Strangeways Research Laboratory, Worts Causeway, Cambridge, UK
| | - Javier Benitez
- Human Genetics Group and Genotyping Unit (CEGEN), Human Cancer Genetics Programme, Spanish National Cancer Research Centre (CNIO), Madrid, Spain. Biomedical Network on Rare Diseases (CIBERER), Madrid, Spain
| | - Andreas Berger
- Dept of OB/GYN, Comprehensive Cancer Center, Medical University of Vienna, Vienna, Austria, Waehringer Guertel 18-20, 1090 Vienna, Austria
| | - Raanan Berger
- The Institute of Oncology, Chaim Sheba Medical Center, Ramat Gan 52621, Israel
| | - Amie M. Blanco
- UCSF Cancer Genetics and Prevention Program, San Francisco, CA 94143-1714
| | - Kathleen R. Blazer
- Clinical Cancer Genetics, City of Hope, 1500 East Duarte Road, Duarte, California 91010 USA
| | - Marinus J. Blok
- Department of Clinical Genetics, Maastricht University Medical Center, P.O. Box 5800, 6202 AZ Maastricht, The Netherlands
| | - Valérie Bonadona
- Unité de Prévention et d’Epidémiologie Génétique, Centre Léon Bérard, 28 rue Laënnec, Lyon, France
| | - Bernardo Bonanni
- Division of Cancer Prevention and Genetics, Istituto Europeo di Oncologia (IEO), via Ripamonti 435, 20141 Milan, Italy
| | - Angela R. Bradbury
- Department of Medicine, Abramson Cancer Center, Perelman School of Medicine at the University of Pennsylvania, 3400 Civic Center Boulevard, Philadelphia, PA 19104, USA
| | - Carole Brewer
- Department of Clinical Genetics, Royal Devon & Exeter Hospital, Exeter, UK
| | - Bruno Buecher
- Service de Génétique, Institut Curie, 26, rue d’Ulm, Paris Cedex 05, France
| | - Saundra S. Buys
- Department of Medicine, Huntsman Cancer Institute, 2000 Circle of Hope, Salt Lake City, UT 84112, USA
| | - Trinidad Caldes
- Molecular Oncology Laboratory, Hospital Clinico San Carlos, IdISSC, CIBERONC. Martin Lagos s/n, Madrid, Spain
| | - Almuth Caliebe
- Institute of Human Genetics, University Hospital of Schleswig-Holstein, Campus Kiel, Christian-Albrechts University Kiel, Germany
| | - Maria A. Caligo
- Section of Genetic Oncology, Dept. of Laboratory Medicine, University and University Hospital of Pisa, Pisa, Italy
| | - Ian Campbell
- Research Division, Peter MacCallum Cancer Centre, 305 Gratten Street, Melbourne, VIC 3000, Australia
| | - Sandrine Caputo
- Service de Génétique, Institut Curie, 26, rue d’Ulm, Paris Cedex 05, France
| | - Jocelyne Chiquette
- CRCHU de Quebec-oncologie, Centre des maladies du sein Deschênes-Fabia, Hôpital du Saint-Sacrement,1050, chemin Sainte-Foy, Québec Canada
| | - Wendy K. Chung
- Departments of Pediatrics and Medicine, 1150 St. Nicholas Avenue, Columbia University, New York, NY, 10032 USA
| | - Kathleen B.M. Claes
- Center for Medical Genetics, Ghent University, De Pintelaan 185, 9000 Gent, Belgium
| | - J. Margriet Collée
- Department of Clinical Genetics, Family Cancer Clinic, Erasmus University Medical Center, P.O. Box 2040, 3000 CA Rotterdam, The Netherlands
| | - Jackie Cook
- Sheffield Clinical Genetics Service, Sheffield Children’s Hospital, Sheffield, UK
| | - Rosemarie Davidson
- Department of Clinical Genetics, South Glasgow University Hospitals, Glasgow, UK
| | - Miguel de la Hoya
- Molecular Oncology Laboratory, Hospital Clinico San Carlos, IdISSC, CIBERONC. Martin Lagos s/n, Madrid, Spain
| | - Kim De Leeneer
- Center for Medical Genetics, Ghent University, De Pintelaan 185, 9000 Gent, Belgium
| | - Antoine de Pauw
- Service de Génétique, Institut Curie, 26, rue d’Ulm, Paris Cedex 05, France
| | - Capucine Delnatte
- Unité d'oncogénétique, ICO-Centre René Gauducheau, Boulevard Jacques Monod, 44805 Nantes Saint Herblain Cedex, France
| | - Orland Diez
- Oncogenetics Group, Vall d’Hebron Institute of Oncology (VHIO), Clinical and Molecular Genetics Area, Vall d’Hebron University Hospital, Passeig Vall d'Hebron 119-129, Barcelona, Spain
| | - Yuan Chun Ding
- Department of Population Sciences, Beckman Research Institute of City of Hope, Duarte, CA USA
| | - Nina Ditsch
- Department of Gynaecology and Obstetrics, Ludwig-Maximilian University Munich, Germany
| | - Susan M. Domchek
- Department of Medicine, Abramson Cancer Center, Perelman School of Medicine at the University of Pennsylvania, 3400 Civic Center Boulevard, Philadelphia, PA 19104, USA
| | - Cecilia M. Dorfling
- Cancer Genetics Laboratory, Department of Genetics, University of Pretoria, Private Bag X323, Arcadia 0007, South Africa
| | - Carolina Velazquez
- Cáncer Hereditario, Instituto de Biología y Genética Molecular, IBGM, Universidad de Valladolid, Centro Superior de Investigaciones Científicas, UVA-CSIC. Valladolid, Spain
| | - Bernd Dworniczak
- Institute of Human Genetics, University of Münster, Münster, Germany
| | - Jacqueline Eason
- Nottingham Clinical Genetics Service, Nottingham University Hospitals NHS Trust, Nottingham, UK
| | - Douglas F. Easton
- Centre for Cancer Genetic Epidemiology, Department of Public Health and Primary Care, University of Cambridge, Strangeways Research Laboratory, Worts Causeway, Cambridge, UK
| | - Ros Eeles
- Oncogenetics Team, The Institute of Cancer Research and Royal Marsden NHS Foundation Trust, Sutton, UK
| | - Hans Ehrencrona
- Department of Clinical Genetics, Lund University Hospital, Lund, Sweden
| | - Bent Ejlertsen
- Department of Oncology, Rigshospitalet, Copenhagen University Hospital, Blegdamsvej 9, DK-2100 Copenhagen, Denmark
| | - EMBRACE
- Centre for Cancer Genetic Epidemiology, Department of Public Health and Primary Care, University of Cambridge, Strangeways Research Laboratory, Worts Causeway, Cambridge, UK
| | - Christoph Engel
- Institute for Medical Informatics, Statistics and Epidemiology, University of Leipzig, Germany
| | - Stefanie Engert
- Department of Gynaecology and Obstetrics, Division of Tumor Genetics, Klinikum rechts der Isar, Technical University Munich, Germany
| | - D. Gareth Evans
- Genomic Medicine, Manchester Academic Health Sciences Centre, Division of Evolution and Genomic Sciences, University of Manchester, Central Manchester University Hospitals NHS Foundation Trust, Manchester, UK
| | - Laurence Faivre
- Centre de Lutte Contre le Cancer Georges François Leclerc, 1 rue Professeur Marion, BP 77 980, Dijon Cedex, France and Genomic and Immunotherapy Medical Institute, Dijon University Hospital, Dijon, France
| | - Lidia Feliubadaló
- Molecular Diagnostic Unit, Hereditary Cancer Program, ICO-IDIBELL (Catalan Institute of Oncology-Bellvitge Biomedical Research Institute), CIBERONC, Gran Via de l'Hospitalet, 199-203. 08908 L'Hospitalet. Barcelona, Spain
| | - Sandra Fert Ferrer
- Laboratoire de Génétique Chromosomique, Hôtel Dieu Centre Hospitalier, BP 1125 Chambéry, France
| | - Lenka Foretova
- Department of Cancer Epidemiology and Genetics, Masaryk Memorial Cancer Institute, Zluty kopec 7, Brno, 65653, Czech Republic
| | - Jeffrey Fowler
- Ohio State University /Columbus Cancer Council, Columbus, OH 43221, USA
| | - Debra Frost
- Centre for Cancer Genetic Epidemiology, Department of Public Health and Primary Care, University of Cambridge, Strangeways Research Laboratory, Worts Causeway, Cambridge, UK
| | | | - Patricia A. Ganz
- UCLA Schools of Medicine and Public Health, Division of Cancer Prevention & Control Research, Jonsson Comprehensive Cancer Center, 650 Charles Young Drive South, Room A2-125 HS, Los Angeles, CA 90095-6900, USA
| | - Judy Garber
- Cancer Risk and Prevention Clinic, Dana-Farber Cancer Institute, 450 Brookline Avenue, Boston, MA, USA
| | | | - Andrea Gehrig
- Centre of Familial Breast and Ovarian Cancer, Department of Medical Genetics, Institute of Human Genetics, University Würzburg, Germany
| | - GEMO Study Collaborators
- Institut Curie, Department of Tumour Biology, Paris, France; Institut Curie, INSERM U830, Paris, France
| | - Anne-Marie Gerdes
- Department of Clinical Genetics, Rigshospitalet 4062, Blegdamsvej 9, København Ø, Denmark
| | - Paul Gesta
- Service Régional Oncogénétique Poitou-Charentes, Centre Hospitalier, 79021 Niort
| | - Giuseppe Giannini
- Department of Molecular Medicine, University La Sapienza, and Istituto Pasteur - Fondazione Cenci-Bolognetti, viale Regina Elena 291, 00161 Rome, Italy
| | - Sophie Giraud
- Bâtiment Cheney D, Centre Léon Bérard, 28 rue Laënnec, Lyon, France
| | - Gord Glendon
- Ontario Cancer Genetics Network: Lunenfeld-Tanenbaum Research Institute, Mount Sinai Hospital, Toronto, Ontario M5G 1X5, Canada
| | - Andrew K. Godwin
- Department of Pathology and Laboratory Medicine, 3901 Rainbow Boulevard,4019 Wahl Hall East, MS 3040, University of Kansas Medical Center, Kansas City, Kansas, USA
| | - Mark H. Greene
- Clinical Genetics Branch, DCEG, NCI, NIH, 9609 Medical Center Drive, Room 6E-454, Bethesda, MD, USA
| | - Jacek Gronwald
- Department of Genetics and Pathology, Pomeranian Medical University, Unii Lubelskiej 1, Szczecin, Poland
| | - Angelica Gutierrez-Barrera
- Department of Breast Medical Oncology and Clinical Cancer Genetics Program, University Of Texas MD Anderson Cancer Center, 1515 Pressler Street, CBP 5, Houston, TX, USA
| | - Eric Hahnen
- Center for Familial Breast and Ovarian Cancer, Center for Integrated Oncology (CIO), Medical Faculty, University Hospital Cologne, Cologne, Germany
| | - Jan Hauke
- Center for Familial Breast and Ovarian Cancer, Center for Integrated Oncology (CIO), Medical Faculty, University Hospital Cologne, Cologne, Germany
| | - HEBON
- The Hereditary Breast and Ovarian Cancer Research Group Netherlands (HEBON), Coordinating center: Netherlands Cancer Institute, Amsterdam, The Netherlands
| | - Alex Henderson
- Institute of Genetic Medicine, Centre for Life, Newcastle Upon Tyne Hospitals NHS Trust, Newcastle upon Tyne, UK
| | - Julia Hentschel
- Institute of Human Genetics, University Leipzig, 04107 Leipzig, Germany
| | - Frans B.L. Hogervorst
- Family Cancer Clinic, Netherlands Cancer Institute, P.O. Box 90203, 1006 BE Amsterdam, The Netherlands
| | - Ellen Honisch
- Department of Gynaecology and Obstetrics, University Hospital Düsseldorf, Heinrich-Heine University Düsseldorf, Germany
| | | | - Claudine Isaacs
- Lombardi Comprehensive Cancer Center, Georgetown University, 3800 Reservoir Road NW, Washington, DC, USA
| | - Louise Izatt
- Clinical Genetics, Guy’s and St. Thomas’ NHS Foundation Trust, London, UK
| | - Angel Izquierdo
- Genetic Counseling Unit, Hereditary Cancer Program, IDIBGI (Institut d'Investigació Biomèdica de Girona), Catalan Institute of Oncology, CIBERONC, Av. França s/n. 1707 Girona, Spain
| | - Anna Jakubowska
- Department of Genetics and Pathology, Pomeranian Medical University, Unii Lubelskiej 1, Szczecin, Poland
| | - Paul James
- Parkville Familial Cancer Centre, Peter MacCallum Cancer Centre, 305 Gratten Street, Melbourne, VIC 3000, Australia
| | - Ramunas Janavicius
- Vilnius University Hospital Santariskiu Clinics, Hereditary Cancer Competence Center Hematology, Oncology and Transfusion Medicine Center Room P519 Santariskiu st. 2, LT-08661 Vilnius, Lithuania
| | - Uffe Birk Jensen
- Department of Clinical Genetics, Aarhus University Hospital, Brendstrupgaardsvej 21C, Aarhus N, Denmark
| | - Esther M. John
- Department of Epidemiology, Cancer Prevention Institute of California, 2201 Walnut Avenue, Suite 300, Fremont, CA 94538, USA and Department of Health Research and Policy (Epidemiology) and Stanford Cancer Institute, Stanford University School of Medicine, Stanford, CA, USA
| | - Vijai Joseph
- Clinical Genetics Research Laboratory, Dept. of Medicine, Memorial Sloan-Kettering Cancer Center, 1275 York Avenue, New York, NY 10044, USA
| | - Katarzyna Kaczmarek
- Department of Genetics and Pathology, Pomeranian Medical University, Unii Lubelskiej 1, Szczecin, Poland
| | - Beth Y. Karlan
- Women's Cancer Program at the Samuel Oschin Comprehensive Cancer Institute, Cedars-Sinai Medical Center, 8700 Beverly Boulevard, Suite 290W, Los Angeles, CA, USA
| | - Karin Kast
- Department of Gynecology and Obstetrics, Medical Faculty and University Hospital Carl Gustav Carus, Technische Universität Dresden, Germany
| | - KConFab Investigators
- Research Department, Peter MacCallum Cancer Centre, Melbourne, Victoria, Australia and The Sir Peter MacCallum Department of Oncology University of Melbourne, Parkville, Australia
| | - Sung-Won Kim
- Department of Surgery, Daerim St. Mary's Hospital, 657 Siheung-daero, Yeongdeungpo-gu, Seoul, Korea
| | - Irene Konstantopoulou
- Molecular Diagnostics Laboratory, INRASTES (Institute of Nuclear and Radiological Sciences and Technology), National Centre for Scientific Research "Demokritos", Patriarchou Gregoriou & Neapoleos str., Aghia Paraskevi Attikis, Athens, Greece
| | - Jacob Korach
- The Gyneco-Oncology Department, Chaim Sheba Medical Center, Ramat Gan 52621, Israel
| | - Yael Laitman
- The Susanne Levy Gertner Oncogenetics Unit, Institute of Human Genetics, Chaim Sheba Medical Center, Ramat Gan 52621, and the Sackler School of Medicine, Tel-Aviv University, Tel-Aviv, Israel
| | - Adriana Lasa
- Servicio de Genética-CIBERER U705, Hospital de la Santa Creu i Sant Pau, Barcelona
| | - Christine Lasset
- Unité de Prévention et d’Epidémiologie Génétique, Centre Léon Bérard, 28 rue Laënnec, Lyon, France
| | - Conxi Lázaro
- Molecular Diagnostic Unit, Hereditary Cancer Program, ICO-IDIBELL (Catalan Institute of Oncology-Bellvitge Biomedical Research Institute), CIBERONC, Gran Via de l'Hospitalet, 199-203. 08908 L'Hospitalet. Barcelona, Spain
| | - Annette Lee
- The Feinstein Institute for Medical Research 350 Community Drive Manhasset NY
| | - Min Hyuk Lee
- Department of Surgery, Soonchunhyang University and Seoul Hospital, 59 Daesagwan-Ro, Yongsan-Gu, Seoul, Korea
| | - Jenny Lester
- Women's Cancer Program at the Samuel Oschin Comprehensive Cancer Institute, Cedars-Sinai Medical Center, 8700 Beverly Boulevard, Suite 290W, Los Angeles, CA, USA
| | - Fabienne Lesueur
- Institut Curie, PSL Research University, Mines ParisTech, Inserm U900, 26 rue d'Ulm, F-75005 Paris, France
| | - Annelie Liljegren
- Department of Oncology Radiumhemmet and Institution of Oncology and Patology, Karolinska University Hospital and Karolinska Institutet
| | - Noralane M. Lindor
- Department of Health Sciences Research, Mayo Clinic, 13400 E. Scottsdale Blvd., Scottsdale, AZ, USA
| | - Michel Longy
- Oncogénétique, Institut Bergonié, 229 cours de l'Argonne, 33076 Bordeaux, France
| | - Jennifer T. Loud
- Clinical Genetics Branch, DCEG, NCI, NIH, 9609 Medical Center Drive, Room 6E-536, Bethesda, MD, USA
| | - Karen H. Lu
- Department of Gynecological Oncology and Clinical Cancer Genetics Program, University Of Texas MD Anderson Cancer Center, 1515 Pressler Street, CPB 6, Houston, TX, USA
| | - Jan Lubinski
- Department of Genetics and Pathology, Pomeranian Medical University, Unii Lubelskiej 1, Szczecin, Poland
| | - Eva Machackova
- Department of Cancer Epidemiology and Genetics, Masaryk Memorial Cancer Institute, Zluty kopec 7, Brno, 65653, Czech Republic
| | - Siranoush Manoukian
- Unit of Medical Genetics, Department of Medical Oncology and Hematology, Fondazione IRCCS (Istituto Di Ricovero e Cura a Carattere Scientifico) Instituto Nazionale Tumori (INT), Via Giacomo Venezian 1, 20133 Milan, Italy
| | - Véronique Mari
- Centre Antoine Lacassagne, 33 Avenue de Valombrose, Nice, France
| | - Cristina Martínez-Bouzas
- Laboratorio de Genética Molecular, Servicio de Genética, Hospital Universitario Cruces, BioCruces Health Research Institute, Spain
| | - Zoltan Matrai
- Department of Surgery, National Institute of Oncology, Budapest, Hungary
| | - Noura Mebirouk
- Institut Curie, PSL Research University, Mines ParisTech, Inserm U900, 26 rue d'Ulm, F-75005 Paris, France
| | - Hanne E.J. Meijers-Heijboer
- Department of Clinical Genetics, VU University Medical Center, P.O. Box 7057, 1007 MB Amsterdam, The Netherlands
| | - Alfons Meindl
- Department of Gynaecology and Obstetrics, Division of Tumor Genetics, Klinikum rechts der Isar, Technical University Munich, Germany
| | - Arjen R. Mensenkamp
- Department of Human Genetics, Radboud University Medical Center, P.O. Box 9101, 6500 HB Nijmegen, The Netherlands
| | - Ugnius Mickys
- Vilnius university Santariskiu hospital, National Center of Pathology, Baublio st. 5, Vilnius, Lithuania
| | - Austin Miller
- NRG Oncology, Statistics and Data Management Center, Roswell Park Cancer Institute, Elm St & Carlton St, Buffalo, NY 14263, USA
| | - Marco Montagna
- Immunology and Molecular Oncology Unit, Veneto Institute of Oncology IOV - IRCCS, Via Gattamelata 64, Padua, Italy
| | - Kirsten B. Moysich
- Department of Cancer Prevention and Control, Roswell Park Cancer Institute, Buffalo, NY, USA
| | - Anna Marie Mulligan
- Department of Laboratory Medicine and Pathobiology, University of Toronto, Toronto, ON, Canada
| | - Jacob Musinsky
- Clinical Genetics Research Laboratory, Dept. of Medicine, Memorial Sloan-Kettering Cancer Center, 1275 York Avenue, New York, NY 10044, USA
| | - Susan L. Neuhausen
- Department of Population Sciences, Beckman Research Institute of City of Hope, Duarte, CA USA
| | - Heli Nevanlinna
- Department of Obstetrics and Gynecology, University of Helsinki and Helsinki University Hospital, Biomedicum Helsinki, P.O. BOX 700 (Haartmaninkatu 8), 00029 HUS, Finland
| | - Joanne Ngeow
- Cancer Genetics Service, Division of Medical Oncology, National Cancer Centre Singapore, 11 Hospital Drive, Singapore 169610
| | - Huu Phuc Nguyen
- Institute of Medical Genetics and Applied Genomics, University of Tuebingen, Germany
| | - Dieter Niederacher
- Department of Gynaecology and Obstetrics, University Hospital Düsseldorf, Heinrich-Heine University Düsseldorf, Germany
| | - Henriette Roed Nielsen
- Department of Clinical Genetics, Odense University Hospital, Sonder Boulevard 29, Odense C, Denmark
| | - Finn Cilius Nielsen
- Center for Genomic Medicine, Rigshospitalet, University of Copenhagen, Denmark
| | | | - Kenneth Offit
- Clinical Genetics Research Laboratory, Dept. of Medicine, Cancer Biology and Genetics, Memorial Sloan-Kettering Cancer Center, 1275 York Avenue, New York, NY 10044, USA
| | - Anna Öfverholm
- Department of Clinical Genetics, Sahlgrenska University Hospital, Gothenburg, Sweden
| | - Kai-ren Ong
- West Midlands Regional Genetics Service, Birmingham Women’s Hospital Healthcare NHS Trust, Edgbaston, Birmingham, UK
| | - Ana Osorio
- Human Genetics Group, Human Cancer Genetics Programme, Spanish National Cancer Research Centre (CNIO), Madrid, Spain. Biomedical Network on Rare Diseases (CIBERER), Madrid, Spain
| | - Laura Papi
- Unit of Medical Genetics, Department of Biomedical, Experimental and Clinical Sciences, University of Florence, Viale Morgagni 50, 50134 Florence, Italy
| | - Janos Papp
- Department of Molecular Genetics, National Institute of Oncology, Budapest, Hungary
| | - Barbara Pasini
- Department of Medical Sciences, University of Turin, Via Santena 19, 10126 Turin, Italy
| | - Inge Sokilde Pedersen
- Section of Molecular Diagnostics, Department of Biochemistry, Aalborg University Hospital, Reberbansgade 15, Aalborg, Denmark
| | - Ana Peixoto
- Department of Genetics, Portuguese Oncology Institute of Porto (IPO Porto), Porto, Portugal, and Biomedical Sciences Institute (ICBAS), University of Porto, Porto, Portugal
| | - Nina Peruga
- Department of Genetics and Pathology, Pomeranian Medical University, Unii Lubelskiej 1, Szczecin, Poland
| | - Paolo Peterlongo
- IFOM, The FIRC (Italian Foundation for Cancer Research) Institute of Molecular Oncology, via Adamello 16, 20139 Milan, Italy
| | - Esther Pohl
- Center for Familial Breast and Ovarian Cancer, Center for Integrated Oncology (CIO), Medical Faculty, University Hospital Cologne, Cologne, Germany
| | - Nisha Pradhan
- Clinical Genetics Research Laboratory, Dept. of Medicine, Memorial Sloan-Kettering Cancer Center, 1275 York Avenue, New York, NY 10044, USA
| | - Karolina Prajzendanc
- Department of Genetics and Pathology, Pomeranian Medical University, Unii Lubelskiej 1, Szczecin, Poland
| | - Fabienne Prieur
- Service de Génétique Clinique Chromosomique et Moléculaire, Hôpital Nord, CHU Saint Etienne, St Etienne cedex 2, France
| | - Pascal Pujol
- Unité d'Oncogénétique, CHU Arnaud de Villeneuve, 34295 Montpellier Cedex 5, France
| | - Paolo Radice
- Unit of Molecular Bases of Genetic Risk and Genetic Testing, Department of Research, Fondazione IRCCS (Istituto Di Ricovero e Cura a Carattere Scientifico) Istituto Nazionale Tumori (INT), c/o Amaedeolab, via GA Amadeo 42, 20133 Milan, Italy
| | - Susan J. Ramus
- School of Women's and Children's Health, UNSW Sydney, Australia
- The Kinghorn Cancer Centre, Garvan Institute of Medical Research, Australia
| | - Johanna Rantala
- Department of Clinical Genetics, Karolinska University Hospital L5:03, Stockholm S-171 76, Sweden
| | - Muhammad Usman Rashid
- Molecular Genetics of Breast Cancer, German Cancer Research Center (DKFZ), Im Neuenheimer Feld 580, 69120 Heidelberg, Germany
- Department of Basic Sciences, Shaukat Khanum Memorial Cancer Hospital and Research Centre (SKMCH & RC) 7A, Block R3, Johar Town, Lahore, Punjab 54000, Pakistan
| | - Kerstin Rhiem
- Center for Familial Breast and Ovarian Cancer, Center for Integrated Oncology (CIO), Medical Faculty, University Hospital Cologne, Cologne, Germany
| | - Mark Robson
- Clinical Genetics Services, Dept. of Medicine, Memorial Sloan-Kettering Cancer Center, 1275 York Avenue, New York, NY, USA
| | - Gustavo C. Rodriguez
- Division of Gynecologic Oncology, North Shore University Health System, Clinical Professor, University of Chicago, 2650 Ridge Avenue, Suite 1507 Walgreens, Evanston, IL 60201, USA
| | - Mark T. Rogers
- All Wales Medical Genetics Services, University Hospital of Wales, Cardiff, UK
| | - Vilius Rudaitis
- Vilnius University Hospital Santariskiu Clinics, Centre of Woman's Health and pathology, Department of Gynecology, Santariskiu st. 2, Vilnius, Lithuania
| | - Ane Y. Schmidt
- Center for Genomic Medicine, Rigshospitalet, University of Copenhagen, Denmark
| | - Rita Katharina Schmutzler
- Center for Familial Breast and Ovarian Cancer, Center for Integrated Oncology (CIO), Medical Faculty, University Hospital Cologne, Cologne, Germany
| | - Leigha Senter
- Clinical Cancer Genetics Program, Division of Human Genetics, Department of Internal Medicine, The Comprehensive Cancer Center, The Ohio State University, Columbus, USA
| | - Payal D. Shah
- Department of Medicine, Abramson Cancer Center, Perelman School of Medicine at the University of Pennsylvania, 3400 Civic Center Boulevard, Philadelphia, PA 19104, USA
| | - Priyanka Sharma
- Department of Hematology and Oncology, University of Kansas Medical Center, Suite 210, 2330 Shawnee Mission Parkway, Westwood, KS, USA
| | - Lucy E. Side
- North East Thames Regional Genetics Service, Great Ormond Street Hospital for Children NHS Trust, London, UK
| | - Jacques Simard
- Genomics Center, Centre Hospitalier Universitaire de Québec Research Center and Laval University, 2705 Laurier Boulevard, Quebec City (Quebec), Canada
| | - Christian F. Singer
- Dept of OB/GYN and Comprehensive Cancer Center, Medical University of Vienna, Vienna, Austria, Waehringer Guertel 18-20, A 1090 Vienna, Austria
| | - Anne-Bine Skytte
- Department of Clinical Genetics, Aarhus University Hospital, Brendstrupgaardsvej 21C, Aarhus N, Denmark
| | - Thomas P. Slavin
- Clinical Cancer Genetics, City of Hope, 1500 East Duarte Road, Duarte, California 91010 USA
| | - Katie Snape
- Medical Genetics Unit, St George's, University of London, UK
| | - Hagay Sobol
- Département Oncologie Génétique, Prévention et Dépistage, Institut Paoli-Calmettes, 232 boulevard Sainte-Margueritte, Marseille, France
| | - Melissa Southey
- Département Oncologie Génétique, Prévention et Dépistage, Institut Paoli-Calmettes, 232 boulevard Sainte-Margueritte, Marseille, France
| | - Linda Steele
- Department of Population Sciences, Beckman Research Institute of City of Hope, Duarte, CA USA
| | - Doris Steinemann
- Institute of Cell and Molecular Pathology, Hannover Medical School, Hannover, Germany
| | - Grzegorz Sukiennicki
- Department of Genetics and Pathology, Pomeranian Medical University, Unii Lubelskiej 1, Szczecin, Poland
| | - Christian Sutter
- Department of Human Genetics, University Hospital Heidelberg, Germany
| | - Csilla I. Szabo
- National Human Genome Research Institute, National Institutes of Health Building 50, Room 5312, 50 South Drive, MSC 004, Bethesda, MD, USA
| | - Yen Y. Tan
- Dept of OB/GYN, Comprehensive Cancer Center, Medical University of Vienna, Vienna, Austria, Waehringer Guertel 18-20, 1090 Vienna, Austria
| | - Manuel R. Teixeira
- Department of Genetics, Portuguese Oncology Institute of Porto (IPO Porto), Porto, Portugal, and Biomedical Sciences Institute (ICBAS), University of Porto, Porto, Portugal
| | - Mary Beth Terry
- Department of Epidemiology, Columbia University, New York, NY, USA
| | - Alex Teulé
- Genetic Counseling Unit, Hereditary Cancer Program, IDIBELL (Bellvitge Biomedical Research Institute), Catalan Institute of Oncology, CIBERONC, Gran Via de l'Hospitalet, 199-203. 08908 L'Hospitalet, Barcelona, Spain
| | - Abigail Thomas
- Department of Health Sciences Research, Mayo Clinic, 200 First Street SW, Rochester, Minnesota, USA
| | - Darcy L. Thull
- Department of Medicine, Magee-Womens Hospital, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA
| | - Marc Tischkowitz
- Program in Cancer Genetics, Departments of Human Genetics and Oncology, McGill University, Montreal, Quebec, Canada
| | - Silvia Tognazzo
- Immunology and Molecular Oncology Unit, Veneto Institute of Oncology IOV - IRCCS, Via Gattamelata 64, Padua, Italy
| | - Amanda Ewart Toland
- Division of Human Genetics, Departments of Internal Medicine and Cancer Biology and Genetics, Comprehensive Cancer Center, The Ohio State University, 460 W. 12 Avenue, Columbus, OH, USA
| | - Sabine Topka
- Clinical Genetics Research Laboratory, Dept. of Medicine, Memorial Sloan-Kettering Cancer Center, 1275 York Avenue, New York, NY 10044, USA
| | - Alison H Trainer
- Parkville Familial Cancer Centre, Royal Melbourne Hospital, Melbourne, Australia
| | - Nadine Tung
- Department of Medical Oncology, Beth Israel Deaconess Medical Center, 330 Brookline Avenue Boston, Massachusetts 02215, USA
| | - Christi J. van Asperen
- Department of Clinical Genetics, Leiden University Medical Center, P.O. Box 9600, 2300 RC Leiden, The Netherlands
| | | | | | - Rob B. van der Luijt
- Department of Medical Genetics, University Medical Center Utrecht, The Netherlands
| | | | - Liliana Varesco
- Unit of Hereditary Cancer, Department of Epidemiology, Prevention and Special Functions, IRCCS (Istituto Di Ricovero e Cura a Carattere Scientifico) AOU San Martino - IST Istituto Nazionale per la Ricerca sul Cancro, largo Rosanna Benzi 10, 16132 Genoa, Italy
| | | | - Ana Vega
- Fundación Pública Galega Medicina Xenómica, calle Choupana s/n, Edificio de Consultas, Planta menos dos Santiago de Compostal, A Coruña, Spain
| | - Cynthia Villarreal-Garza
- Departamento de Investigacion y de Tumores Mamarios del Instituto Nacional de Cancerologia, Mexico City; and Centro de Cancer de Mama del Hospital Zambrano Hellion, Tecnologico de Monterrey, San Pedro Garza Garcia, Nuevo Leon
| | | | - Lisa Walker
- Oxford Regional Genetics Service, Churchill Hospital, Oxford, UK
| | - Shan Wang-Gohrke
- Department of Gynaecology and Obstetrics, University Hospital Ulm, Germany
| | - Barbara Wappenschmidt
- Department of Genetics and Pathology, Pomeranian Medical University, Unii Lubelskiej 1, Szczecin, Poland
| | | | - Drakoulis Yannoukakos
- Molecular Diagnostics Laboratory, INRASTES (Institute of Nuclear and Radiological Sciences and Technology), National Centre for Scientific Research "Demokritos", Patriarchou Gregoriou & Neapoleos str., Aghia Paraskevi Attikis, Athens, Greece
| | - Sook-Yee Yoon
- Cancer Research Initiatives Foundation, Sime Darby Medical Centre, 1 Jalan SS12/1A, Subang Jaya, 47500, Malaysia
| | - Cristina Zanzottera
- Unit of Medical Genetics, Department of Medical Oncology and Hematology, Fondazione IRCCS (Istituto Di Ricovero e Cura a Carattere Scientifico) Instituto Nazionale Tumori (INT), Via Giacomo Venezian 1, 20133 Milan, Italy
| | - Jamal Zidan
- Institute of Oncology, Rivka Ziv Medical Center, 13000 Zefat, Israel
| | - Kristin K. Zorn
- Magee-Womens Hospital, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA
| | - Christina G. Hutten Selkirk
- Center for Medical Genetics, NorthShore University HealthSystem,1000 Central St, Suite 620, Evanston, IL, USA
| | - Peter J. Hulick
- Medical Director, Center for Medical Genetics, North Shore University Health System, Clinical Assistant Professor of Medicine, University of Chicago Pritzker School of Medicine, 1000 Central Street, Suite 620, Evanston, IL 60201, USA
| | - Georgia Chenevix-Trench
- Genetics and Computational Biology Department, QIMR Berghofer Medical Research Institute, Herston Road, Brisbane, QLD 4006, Australia
| | - Amanda B. Spurdle
- Genetics and Computational Biology Department, QIMR Berghofer Medical Research Institute, Herston Road, Brisbane, QLD 4006, Australia
| | - Antonis C. Antoniou
- Centre for Cancer Genetic Epidemiology, Department of Public Health and Primary Care, University of Cambridge, Strangeways Research Laboratory, Worts Causeway, Cambridge, UK
| | - Katherine L. Nathanson
- Department of Medicine, Abramson Cancer Center, Perelman School of Medicine at the University of Pennsylvania, 3400 Civic Center Boulevard, Philadelphia, PA 19104, USA
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A comprehensive analysis of BRCA2 gene: focus on mechanistic aspects of its functions, spectrum of deleterious mutations, and therapeutic strategies targeting BRCA2-deficient tumors. Med Oncol 2018; 35:18. [PMID: 29387975 DOI: 10.1007/s12032-018-1085-8] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2017] [Accepted: 01/10/2018] [Indexed: 12/23/2022]
Abstract
BRCA2is the main susceptibility gene known to be involved in the pathogenesis of breast cancer. It plays an important role in maintaining the genome stability by homologous recombination through DNA double-strand breaks repairing, by interacting with various other proteins including RAD51, DSS1, RPA, MRE11, PALB2, and p53. BRCA2-deficient cells show the abnormalities of chromosome number. BRCA2 is also found to be involved in centrosome duplication specifically in the metaphase to anaphase transition. Inactivation or depletion of BRCA2 leads to centrosome amplification that results in unequal separation of chromosomes. BRCA2 localizes with central spindle and midbody during telophase and cytokinesis. Inactivation or depletion of BRCA2 leads to multinucleation of cell. Around 2000 mutations have been reported in BRCA2 gene. BRCA2-deficient tumors are being taking into consideration for targeted cancer therapy by using different inhibitors like poly ADP-ribose polymerase and thymidylate synthase. The present review focusses on the role of BRCA2 in various critical cellular processes based on the mechanistic approaches. Mutations reported in the BRCA2 gene in various ethnic groups till date have also been compiled with an insight into the functional aspects of these alterations. The therapeutic strategies for targeting BRCA2-deficient tumors have also been targeted.
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16
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de Juan I, Palanca S, Domenech A, Feliubadaló L, Segura Á, Osorio A, Chirivella I, de la Hoya M, Sánchez AB, Infante M, Tena I, Díez O, Garcia-Casado Z, Vega A, Teulé À, Barroso A, Pérez P, Durán M, Carrasco E, Juan-Fita MJ, Murria R, Llop M, Barragan E, Izquierdo Á, Benítez J, Caldés T, Salas D, Bolufer P. BRCA1 and BRCA2 mutations in males with familial breast and ovarian cancer syndrome. Results of a Spanish multicenter study. Fam Cancer 2016; 14:505-13. [PMID: 26026974 DOI: 10.1007/s10689-015-9814-z] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
Male breast cancer (MBC) is a rare disease that represents <1% of all breast cancers (BCs). We analyze the results of a multicenter study performed in Spanish familial MBC including family history of hereditary breast and ovarian cancer syndrome (HBOCS) and clinicopathological features. We also study the relationship between BRCA1/BRCA2 mutational status in male relatives affected with cancer (MAC) and, family history and tumor types. The study included 312 men index cases with family history of HBOCS and 61 MAC BRCA1/2 mutation-carriers. Family history, histological grade (HG), clinicopathological and immunohistochemistry data were collected. BRCA1/2 mutation analyses were performed by direct sequencing or screening methods and the large rearrangements by multiplex ligation dependent probe amplification. We found 49 mutation-carriers (15.7%), 95.9% with BRCA2 mutations. BRCA2 mutation-carriers were associated with families with at least one MBC and one BC in female (type II; p = 0.05). Strong association were found between the presence of pathogenic mutations in MBCs and the advanced HG (p = 0.003). c.658_659delTG, c.2808_2811delACAA, c.6275_6276delTT and c.9026_9030delATCAT were the most prevalent mutations. In 61 MAC we found 20 mutations in BRCA1 and 41 in BRCA2. For MAC we show that mutational status was differentially associated with family history (p = 0.018) and tumor type, being BRCA2 mutations linked with BC and prostatic cancer (p = 0.018). MBC caused by BRCA1/2 mutations define two types of MBCs. The most frequent caused by BRCA2 mutation linked to type II families and the rarest one attributed to BRCA1 mutation. Tumor associated with MAC suggest that only BRCA2 mutations have to do with a specific type of cancer (BC and prostatic cancer); but the linkage to tumors is questionable for BRCA1 mutations .
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Affiliation(s)
- Inmaculada de Juan
- Laboratory of Molecular Biology, Service of Clinical Analysis, University and Polytechnic Hospital La Fe, Escuela de Enfermería 7ª planta. Avd. Campanar 21, Valencia, 46009, Spain.
| | - Sarai Palanca
- Laboratory of Molecular Biology, Service of Clinical Analysis, University and Polytechnic Hospital La Fe, Escuela de Enfermería 7ª planta. Avd. Campanar 21, Valencia, 46009, Spain
| | - Asunción Domenech
- Laboratory of Molecular Biology, Service of Clinical Analysis, University and Polytechnic Hospital La Fe, Escuela de Enfermería 7ª planta. Avd. Campanar 21, Valencia, 46009, Spain
| | - Lidia Feliubadaló
- Hereditary Cancer Program, Catalan Institute of Oncology (ICO), L'Hospitalet de Llobregat (Barcelona), Spain
| | - Ángel Segura
- Unit of Genetic Counseling in Cancer, Hospital Universitario y Politécnico La Fe, Valencia, Spain
| | - Ana Osorio
- Human Genetics Group, Human Cancer Genetics Programme, Spanish National Cancer Research Centre and Spanish Network on Rare Diseases (CIBERER), Madrid, Spain
| | - Isabel Chirivella
- Unit of Genetic Counseling in Cancer, Hospital Clínico, Valencia, Spain
| | - Miguel de la Hoya
- Molecular Oncology Laboratory, IdISSC, Hospital Clínico San Carlos, Madrid, Spain
| | - Ana Beatriz Sánchez
- Unit of Genetic Counseling in Cancer, Hospital General de Elche, Elche, Spain
| | - Mar Infante
- Cancer Genetic Group, Institute of Genetics and Molecular Biology (UVa-CSIC), Valladolid, Spain
| | - Isabel Tena
- Unit of Genetic Counseling in Cancer, Hospital General de Castellón, Castellón, Spain
| | - Orland Díez
- Oncogenetics Laboratory, University Hospital Vall d'Hebron, Vall d'Hebron Institute of Oncology (VHIO), Universitat Autònoma de Barcelona, Barcelona, Spain
| | - Zaida Garcia-Casado
- Laboratory of Molecular Biology, Valencian Institute of Oncology (IVO), Valencia, Spain
| | - Ana Vega
- Fundación Pública Galega de Medicina Xenómica-SERGAS, Grupo de Medicina Xenómica-USC, IDIS, CIBERER, Santiago de Compostela, Spain
| | - Àlex Teulé
- Hereditary Cancer Program, Catalan Institute of Oncology (ICO), L'Hospitalet de Llobregat (Barcelona), Spain
| | - Alicia Barroso
- Human Genetics Group, Human Cancer Genetics Programme, Spanish National Cancer Research Centre and Spanish Network on Rare Diseases (CIBERER), Madrid, Spain
| | - Pedro Pérez
- Department of Oncology, IdISSC, Hospital Clínico San Carlos, Madrid, Spain
| | - Mercedes Durán
- Cancer Genetic Group, Institute of Genetics and Molecular Biology (UVa-CSIC), Valladolid, Spain
| | - Estela Carrasco
- High Risk and Prevention Unit, University Hospital Vall d'Hebron, Barcelona, Spain
| | | | - Rosa Murria
- Laboratory of Molecular Biology, Service of Clinical Analysis, University and Polytechnic Hospital La Fe, Escuela de Enfermería 7ª planta. Avd. Campanar 21, Valencia, 46009, Spain
| | - Marta Llop
- Laboratory of Molecular Biology, Service of Clinical Analysis, University and Polytechnic Hospital La Fe, Escuela de Enfermería 7ª planta. Avd. Campanar 21, Valencia, 46009, Spain
| | - Eva Barragan
- Laboratory of Molecular Biology, Service of Clinical Analysis, University and Polytechnic Hospital La Fe, Escuela de Enfermería 7ª planta. Avd. Campanar 21, Valencia, 46009, Spain
| | - Ángel Izquierdo
- Hereditary Cancer Program, Catalan Institute of Oncology (ICO), L'Hospitalet de Llobregat (Barcelona), Spain
| | - Javier Benítez
- Human Genetics Group and Genotyping Unit, Human Cancer Genetics Programme, Spanish National Cancer Research Centre and Spanish Network on Rare Diseases (CIBERER), Madrid, Spain
| | - Trinidad Caldés
- Molecular Oncology Laboratory, IdISSC, Hospital Clínico San Carlos, Madrid, Spain
| | - Dolores Salas
- General Directorate Public Health and Centre for Public Health Research (CSISP), Valencia Genetic Counseling in Cancer Programme, Valencia, Spain
| | - Pascual Bolufer
- Laboratory of Molecular Biology, Service of Clinical Analysis, University and Polytechnic Hospital La Fe, Escuela de Enfermería 7ª planta. Avd. Campanar 21, Valencia, 46009, Spain.
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Weitzel JN. The Genetics of Breast Cancer: What the Surgical Oncologist Needs to Know. Surg Oncol Clin N Am 2016; 24:705-32. [PMID: 26363538 DOI: 10.1016/j.soc.2015.06.011] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
This article summarizes the impact of germline predisposition to breast cancer on the surgical management of breast cancer and breast cancer risk. Surgical implications of germline predisposition to breast cancer are now more nuanced due to the application of increasingly more complicated next-generation sequencing-based tests. The rapid pace of change will continue to challenge paradigms for genetic cancer risk assessment, which can influence the medical and surgical management of breast cancer risk as well as strategies for screening and for risk reduction.
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Affiliation(s)
- Jeffrey N Weitzel
- Division of Clinical Cancer Genetics, City of Hope Comprehensive Cancer Center, 1500 East Duarte Road, Duarte, CA 91010, USA.
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18
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Alemar B, Herzog J, Brinckmann Oliveira Netto C, Artigalás O, Schwartz IVD, Matzenbacher Bittar C, Ashton-Prolla P, Weitzel JN. Prevalence of Hispanic BRCA1 and BRCA2 mutations among hereditary breast and ovarian cancer patients from Brazil reveals differences among Latin American populations. Cancer Genet 2016; 209:417-422. [PMID: 27425403 DOI: 10.1016/j.cancergen.2016.06.008] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2016] [Revised: 06/07/2016] [Accepted: 06/09/2016] [Indexed: 12/12/2022]
Abstract
Germline mutations in BRCA1 or BRCA2 (BRCA) are responsible for 5-15% of breast (BC) and ovarian cancers (OC), predisposing to the development of early onset and often multiple primary tumors. Since mutation carriers can benefit from risk-reducing interventions, the identification of individuals with hereditary breast and ovarian cancer (HBOC) syndrome has a significant clinical impact. We assessed whether a panel assay for recurrent Hispanic BRCA mutations (HISPANEL) has an adequate breadth of coverage to be suitable as a cost effective screening tool for HBOC in a cohort of patients from Southern Brazil. A multiplex, PCR-based panel was used to genotype 232 unrelated patients for 114 germline BRCA mutations, finding deleterious mutations in 3.5% of them. This mutation prevalence is within the range detected by the HISPANEL among BC patients unselected for family history in other Latin American settings. The HISPANEL would have accounted for 27% of the BRCA mutations detected by complete sequencing in a comparison cohort (n = 193). This prevalence may be region-specific since significant differences in population structure exist in Brazil. Comprehensive analysis of BRCA in a larger set of HBOC patients from different Brazilian regions is warranted, and the results could inform customization of the HISPANEL as an affordable mutation screening tool.
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Affiliation(s)
- Bárbara Alemar
- Programa de Pós-graduação em Genética e Biologia Molecular (PPGBM), Universidade Federal do Rio Grande do Sul (UFRGS), Av. Bento Gonçalves, 9500-Prédio 43323M, Porto Alegre, Rio Grande do Sul 91501-970, Brazil; Laboratório de Medicina Genômica, Centro de Pesquisa Experimental, Hospital de Clínicas de Porto Alegre (HCPA), Rua Ramiro Barcelos, 2350, Porto Alegre, Rio Grande do Sul 90035-903, Brazil
| | - Josef Herzog
- Department of Population Sciences, Division of Clinical Cancer Genetics, City of Hope, 1500 East Duarte Road, Duarte, CA 91010, USA
| | - Cristina Brinckmann Oliveira Netto
- Serviço de Genética Médica, Hospital de Clínicas de Porto Alegre (HCPA), Rua Ramiro Barcelos, 2350, Porto Alegre, Rio Grande do Sul 90035-903, Brazil
| | - Osvaldo Artigalás
- Hospital Moinhos de Vento (HMV), Rua Ramiro Barcelos, 910, Porto Alegre, Rio Grande do Sul 91790-560, Brazil
| | - Ida Vanessa D Schwartz
- Programa de Pós-graduação em Genética e Biologia Molecular (PPGBM), Universidade Federal do Rio Grande do Sul (UFRGS), Av. Bento Gonçalves, 9500-Prédio 43323M, Porto Alegre, Rio Grande do Sul 91501-970, Brazil; Serviço de Genética Médica, Hospital de Clínicas de Porto Alegre (HCPA), Rua Ramiro Barcelos, 2350, Porto Alegre, Rio Grande do Sul 90035-903, Brazil; Departamento de Genética, UFRGS, Av. Bento Gonçalves, 9500-Prédio 43323M, Porto Alegre, Rio Grande do Sul 91501-970, Brazil
| | - Camila Matzenbacher Bittar
- Programa de Pós-graduação em Genética e Biologia Molecular (PPGBM), Universidade Federal do Rio Grande do Sul (UFRGS), Av. Bento Gonçalves, 9500-Prédio 43323M, Porto Alegre, Rio Grande do Sul 91501-970, Brazil
| | - Patricia Ashton-Prolla
- Programa de Pós-graduação em Genética e Biologia Molecular (PPGBM), Universidade Federal do Rio Grande do Sul (UFRGS), Av. Bento Gonçalves, 9500-Prédio 43323M, Porto Alegre, Rio Grande do Sul 91501-970, Brazil; Laboratório de Medicina Genômica, Centro de Pesquisa Experimental, Hospital de Clínicas de Porto Alegre (HCPA), Rua Ramiro Barcelos, 2350, Porto Alegre, Rio Grande do Sul 90035-903, Brazil; Serviço de Genética Médica, Hospital de Clínicas de Porto Alegre (HCPA), Rua Ramiro Barcelos, 2350, Porto Alegre, Rio Grande do Sul 90035-903, Brazil; Departamento de Genética, UFRGS, Av. Bento Gonçalves, 9500-Prédio 43323M, Porto Alegre, Rio Grande do Sul 91501-970, Brazil.
| | - Jeffrey N Weitzel
- Department of Population Sciences, Division of Clinical Cancer Genetics, City of Hope, 1500 East Duarte Road, Duarte, CA 91010, USA
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19
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Dutil J, Golubeva VA, Pacheco-Torres AL, Diaz-Zabala HJ, Matta JL, Monteiro AN. The spectrum of BRCA1 and BRCA2 alleles in Latin America and the Caribbean: a clinical perspective. Breast Cancer Res Treat 2015; 154:441-53. [PMID: 26564481 PMCID: PMC4661195 DOI: 10.1007/s10549-015-3629-3] [Citation(s) in RCA: 49] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2015] [Accepted: 11/02/2015] [Indexed: 02/07/2023]
Abstract
Hereditary cancer predisposition gene testing allows the identification of individuals at high risk of cancer that may benefit from increased surveillance, chemoprevention, and prophylactic surgery. In order to implement clinical genetic strategies adapted to each population's needs and intrinsic genetic characteristic, this review aims to present the current status of knowledge about the spectrum of BRCA pathogenic variants in Latin American populations. We have conducted a comprehensive review of 33 studies published between 1994 and 2015 reporting the prevalence and/or spectrum of BRCA1 (OMIM 113705) and BRCA2 (OMIM 600185) variants. The combined sample size for these studies consisted of 4835 individuals from 13 countries in Latin America and the Caribbean, as well as in Hispanics in the United States. A total of 167 unique pathogenic variants have been reported in the existing literature. In unselected breast cancer cases, the prevalence ranged from 1.2 to 27.1%. Some countries presented a few recurrent pathogenic variants, while others were characterized by diverse, non-recurrent variants. The proportion of BRCA pathogenic variants shared between Hispanics in the United States and Latin American populations was estimated at 10.4%. Within Latin America and the Caribbean, 8.2% of the BRCA variants reported were present in more than one country. Countries with high prevalence of BRCA pathogenic variants may benefit from more aggressive testing strategies, while testing of recurrent variant panels might present a cost-effective solution for improving genetic testing in some, but not all, countries.
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Affiliation(s)
- Julie Dutil
- Ponce Research Institute, Ponce Health Sciences University, Ponce, PR, USA.
| | - Volha A Golubeva
- Cancer Epidemiology Program, H. Lee Moffitt Cancer Center and Research Institute, Tampa, FL, USA
| | | | | | - Jaime L Matta
- Ponce Research Institute, Ponce Health Sciences University, Ponce, PR, USA
| | - Alvaro N Monteiro
- Cancer Epidemiology Program, H. Lee Moffitt Cancer Center and Research Institute, Tampa, FL, USA
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20
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Higgs JE, Harkness EF, Bowers NL, Howard E, Wallace AJ, Lalloo F, Newman WG, Evans DG. TheBRCA2polymorphic stop codon: stuff or nonsense? J Med Genet 2015; 52:642-5. [DOI: 10.1136/jmedgenet-2015-103206] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2015] [Accepted: 05/11/2015] [Indexed: 11/04/2022]
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21
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Tessereau C, Lesecque Y, Monnet N, Buisson M, Barjhoux L, Léoné M, Feng B, Goldgar DE, Sinilnikova OM, Mousset S, Duret L, Mazoyer S. Estimation of the RNU2 macrosatellite mutation rate by BRCA1 mutation tracing. Nucleic Acids Res 2014; 42:9121-30. [PMID: 25034697 PMCID: PMC4132748 DOI: 10.1093/nar/gku639] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/02/2022] Open
Abstract
Large tandem repeat sequences have been poorly investigated as severe technical limitations and their frequent absence from the genome reference hinder their analysis. Extensive allelotyping of this class of variation has not been possible until now and their mutational dynamics are still poorly known. In order to estimate the mutation rate of a macrosatellite, we analysed in detail the RNU2 locus, which displays at least 50 different alleles containing 5-82 copies of a 6.1 kb repeat unit. Mining data from the 1000 Genomes Project allowed us to precisely estimate copy numbers of the RNU2 repeat unit using read depth of coverage. This further revealed significantly different mean values in various recent modern human populations, favoring a scenario of fast evolution of this locus. Its proximity to a disease gene with numerous founder mutations, BRCA1, within the same linkage disequilibrium block, offered the unique opportunity to trace RNU2 arrays over a large timescale. Analysis of the transmission of RNU2 arrays associated with one ‘private’ mutation in an extended kindred and four founder mutations in multiple kindreds gave an estimation by maximum likelihood of 5 × 10−3 mutations per generation, which is close to that of microsatellites.
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Affiliation(s)
- Chloé Tessereau
- Genetics of Breast Cancer Team, Cancer Research Centre of Lyon, CNRS UMR5286, Inserm U1052, Université Lyon 1, Centre Léon Bérard, Lyon, France Genomic Vision, Bagneux, Paris, France
| | - Yann Lesecque
- Laboratoire de Biométrie et Biologie Evolutive, CNRS UMR5558, Université Lyon 1, France
| | - Nastasia Monnet
- Genetics of Breast Cancer Team, Cancer Research Centre of Lyon, CNRS UMR5286, Inserm U1052, Université Lyon 1, Centre Léon Bérard, Lyon, France
| | - Monique Buisson
- Genetics of Breast Cancer Team, Cancer Research Centre of Lyon, CNRS UMR5286, Inserm U1052, Université Lyon 1, Centre Léon Bérard, Lyon, France
| | - Laure Barjhoux
- Genetics of Breast Cancer Team, Cancer Research Centre of Lyon, CNRS UMR5286, Inserm U1052, Université Lyon 1, Centre Léon Bérard, Lyon, France
| | - Mélanie Léoné
- Unité Mixte de Génétique Constitutionnelle des Cancers Fréquents, Hospices Civils de Lyon/Centre Léon Bérard, Lyon, France
| | - Bingjian Feng
- Department of Dermatology and Huntsman Cancer Institute University of Utah School of Medicine, Salt Lake City, Utah, USA
| | - David E Goldgar
- Department of Dermatology and Huntsman Cancer Institute University of Utah School of Medicine, Salt Lake City, Utah, USA
| | - Olga M Sinilnikova
- Genetics of Breast Cancer Team, Cancer Research Centre of Lyon, CNRS UMR5286, Inserm U1052, Université Lyon 1, Centre Léon Bérard, Lyon, France Unité Mixte de Génétique Constitutionnelle des Cancers Fréquents, Hospices Civils de Lyon/Centre Léon Bérard, Lyon, France
| | - Sylvain Mousset
- Laboratoire de Biométrie et Biologie Evolutive, CNRS UMR5558, Université Lyon 1, France
| | - Laurent Duret
- Laboratoire de Biométrie et Biologie Evolutive, CNRS UMR5558, Université Lyon 1, France
| | - Sylvie Mazoyer
- Genetics of Breast Cancer Team, Cancer Research Centre of Lyon, CNRS UMR5286, Inserm U1052, Université Lyon 1, Centre Léon Bérard, Lyon, France
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22
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de Juan Jiménez I, García Casado Z, Palanca Suela S, Esteban Cardeñosa E, López Guerrero JA, Segura Huerta Á, Chirivella González I, Sánchez Heras AB, Juan Fita MJ, Tena García I, Guillen Ponce C, Martínez de Dueñas E, Romero Noguera I, Salas Trejo D, Goicoechea Sáez M, Bolufer Gilabert P. Novel and recurrent BRCA1/BRCA2 mutations in early onset and familial breast and ovarian cancer detected in the Program of Genetic Counseling in Cancer of Valencian Community (eastern Spain). Relationship of family phenotypes with mutation prevalence. Fam Cancer 2014; 12:767-77. [PMID: 23479189 DOI: 10.1007/s10689-013-9622-2] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
During the first 6 years of the Program of Genetic Counselling in Cancer of Valencia (eastern Spain), 310 mutations (155 in BRCA1 and 155 in BRCA2) in 1,763 hereditary breast (BC) and ovarian cancer (OC) families were identified. Of the mutations found 105 were distinct (53 in BRCA1 and 52 in BRCA2), eight new and 37 recurrent. Two of the novel mutations were frame-shift placed in exons 2 and 11 of BRCA1 and the remaining six were placed in BRCA2; four frame-shift (three in exon 11 and one in exon 23), one deletion of the entire exon 19 and one in the intervening sequence of exon 22. The BRCA1 mutations with higher recurrence were c.66_68delAG, c.5123C > A, c.1961delA, c.3770_3771delAG and c.5152+5G > A that covered 45.2% of mutations of this gene. The age of onset of BCs of c.68_69delAG mutation carriers occurs later than for the other recurrent mutations of this gene (45 vs. 37 years; p = 0.008). The BRCA2 mutations with higher recurrence were c.9026_9030delATCAT, c.3264insT and c.8978_8991del14 which represented 43.2% of all mutations in this gene, being the most recurrent mutation by far c.9026_9030delATCAT that represents 21.3% of BRCA2 mutations and 10.6% of all mutations. Probands with family histories of BC and OC, or OC and/or BC in at least two first degree relatives, were the more likely to have BRCA1/BRCA2 mutations (35.2% of the total mutations). And that most BRCA1mutations (73.19% mutations) occurred in probands with early-onset BC or with family history of OC.
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Affiliation(s)
- Inmaculada de Juan Jiménez
- Laboratory of Molecular Biology, Service of Clinical Analysis, Escuela de Enfermería 7ª, Hospital Universitario La Fe, Avd. Campanar 21, 46009, Valencia, Spain
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23
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Infante M, Durán M, Acedo A, Sánchez-Tapia EM, Díez-Gómez B, Barroso A, García-González M, Feliubadaló L, Lasa A, de la Hoya M, Esteban-Cardeñosa E, Díez O, Martínez-Bouzas C, Godino J, Teulé A, Osorio A, Lastra E, González-Sarmiento R, Miner C, Velasco EA. The highly prevalent BRCA2 mutation c.2808_2811del (3036delACAA) is located in a mutational hotspot and has multiple origins. Carcinogenesis 2013; 34:2505-11. [PMID: 23929434 DOI: 10.1093/carcin/bgt272] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023] Open
Abstract
BRCA2-c.2808_2811del (3036delACAA) is one of the most reported germ line mutations in non-Ashkenazi breast cancer patients. We investigated its genetic origin in 51 Spanish carrier families that were genotyped with 11 13q polymorphic markers. Three independent associated haplotypes were clearly distinguished accounting for 23 [west Castilla y León (WCL)], 20 [east Castilla y León (ECL)] and 6 (South of Spain) families. Mutation age was estimated with the Disequilibrium Mapping using Likelihood Estimation software in a range of 45-68 and 45-71 generations for WCL and ECL haplotypes, respectively. The most prevalent variants, c.2808_2811del and c.2803G > A, were located in a double-hairpin loop structure (c.2794-c.2825) predicted by Quikfold that was proposed as a mutational hotspot. To check this hypothesis, random mutagenesis was performed over a 923 bp fragment of BRCA2, and 86 DNA variants were characterized. Interestingly, three mutations reported in the mutation databases (c.2680G > A, c.2944del and c.2957dup) were replicated and 20 affected the same position with different nucleotide changes. Moreover, five variants were placed in the same hairpin loop of c.2808_2811del, and one affected the same position (c.2808A > G). In conclusion, our results support that at least three different mutational events occurred to generate c.2808_2811del. Other highly prevalent DNA variants, such as BRCA1-c.68_69delAG, BRCA2-c.5946delT and c.8537delAG, are concentrated in hairpin loops, suggesting that these structures may represent mutational hotspots.
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24
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Janavičius R, Rudaitis V, Feng BJ, Ozolina S, Griškevičius L, Goldgar D, Tihomirova L. Haplotype analysis and ancient origin of the BRCA1 c.4035delA Baltic founder mutation. Eur J Med Genet 2013; 56:125-30. [DOI: 10.1016/j.ejmg.2012.12.007] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2012] [Accepted: 12/19/2012] [Indexed: 12/01/2022]
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25
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Karami F, Mehdipour P. A comprehensive focus on global spectrum of BRCA1 and BRCA2 mutations in breast cancer. BIOMED RESEARCH INTERNATIONAL 2013; 2013:928562. [PMID: 24312913 PMCID: PMC3838820 DOI: 10.1155/2013/928562] [Citation(s) in RCA: 106] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/17/2013] [Revised: 07/31/2013] [Accepted: 08/15/2013] [Indexed: 02/05/2023]
Abstract
Breast cancer (BC) is the most common cancer of women all over the world. BRCA1 and BRCA2 gene mutations comprise the most important genetic susceptibility of BC. Except for few common mutations, the spectrum of BRCA1 and BRCA2 mutations is heterogeneous in diverse populations. 185AGdel and 5382insC are the most important BRCA1 and BRCA2 alterations which have been encountered in most of the populations. After those Ashkenazi founder mutations, 300T>G also demonstrated sparse frequency in African American and European populations. This review affords quick access to the most frequent alterations among various populations which could be helpful in BRCA screening programs.
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Affiliation(s)
- Fatemeh Karami
- Department of Medical Genetics, Tehran University of Medical Sciences, School of Medicine, Tehran, Iran
| | - Parvin Mehdipour
- Department of Medical Genetics, Tehran University of Medical Sciences, School of Medicine, Tehran, Iran
- *Parvin Mehdipour:
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26
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Weitzel JN, Clague J, Martir-Negron A, Ogaz R, Herzog J, Ricker C, Jungbluth C, Cina C, Duncan P, Unzeitig G, Saldivar JS, Beattie M, Feldman N, Sand S, Port D, Barragan DI, John EM, Neuhausen SL, Larson GP. Prevalence and type of BRCA mutations in Hispanics undergoing genetic cancer risk assessment in the southwestern United States: a report from the Clinical Cancer Genetics Community Research Network. J Clin Oncol 2012; 31:210-6. [PMID: 23233716 DOI: 10.1200/jco.2011.41.0027] [Citation(s) in RCA: 117] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
PURPOSE To determine the prevalence and type of BRCA1 and BRCA2 (BRCA) mutations among Hispanics in the Southwestern United States and their potential impact on genetic cancer risk assessment (GCRA). PATIENTS AND METHODS Hispanics (n = 746) with a personal or family history of breast and/or ovarian cancer were enrolled in an institutional review board-approved registry and received GCRA and BRCA testing within a consortium of 14 clinics. Population-based Hispanic breast cancer cases (n = 492) enrolled in the Northern California Breast Cancer Family Registry, negative by sequencing for BRCA mutations, were analyzed for the presence of the BRCA1 ex9-12del large rearrangement. RESULTS Deleterious BRCA mutations were detected in 189 (25%) of 746 familial clinic patients (124 BRCA1, 65 BRCA2); 21 (11%) of 189 were large rearrangement mutations, of which 62% (13 of 21) were BRCA1 ex9-12del. Nine recurrent mutations accounted for 53% of the total. Among these, BRCA1 ex9-12del seems to be a Mexican founder mutation and represents 10% to 12% of all BRCA1 mutations in clinic- and population-based cohorts in the United States. CONCLUSION BRCA mutations were prevalent in the largest study of Hispanic breast and/or ovarian cancer families in the United States to date, and a significant proportion were large rearrangement mutations. The high frequency of large rearrangement mutations warrants screening in every case. We document the first Mexican founder mutation (BRCA1 ex9-12del), which, along with other recurrent mutations, suggests the potential for a cost-effective panel approach to ancestry-informed GCRA.
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27
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Constantinou C, Fentiman IS. Diagnosis and treatment of male breast cancer. BREAST CANCER MANAGEMENT 2012. [DOI: 10.2217/bmt.12.47] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
SUMMARY Male breast cancer (MBC) accounts for <1% of mammary neoplasia and because of its rarity, diagnosis and treatment is based on breast cancer in women. The PubMed database was searched for all English language articles from 1993 to May 2012. Search terms included: male breast cancer, diagnosis, treatment and management. Although rare, MBC incidence is rising. Risk factors include hormonal imbalance, Klinefelter’s syndrome, exposure to radiation and BRCA2 mutations. Clinical evaluation combined with fine-needle aspiration/core biopsy usually suffices for diagnosis, but mammography can be helpful. Modified radical mastectomy was the standard treatment; total mastectomy and sentinel node biopsy is now the treatment of choice in node-negative cases. Tamoxifen is the mainstay of adjuvant hormonal therapy, but a role for aromatase inhibitors is emerging. Given the low incidence of MBC, worldwide studies are needed to improve management and prognosis.
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Affiliation(s)
- Chloe Constantinou
- Research Oncology, 3rd Floor Bermondsey Wing, Guy’s Hospital, London SE1 9RT, UK
| | - Ian S Fentiman
- Research Oncology, 3rd Floor Bermondsey Wing, Guy’s Hospital, London SE1 9RT, UK
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28
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Laitman Y, Feng BJ, Zamir IM, Weitzel JN, Duncan P, Port D, Thirthagiri E, Teo SH, Evans G, Latif A, Newman WG, Gershoni-Baruch R, Zidan J, Shimon-Paluch S, Goldgar D, Friedman E. Haplotype analysis of the 185delAG BRCA1 mutation in ethnically diverse populations. Eur J Hum Genet 2012; 21:212-6. [PMID: 22763381 DOI: 10.1038/ejhg.2012.124] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
The 185delAG* BRCA1 mutation is encountered primarily in Jewish Ashkenazi and Iraqi individuals, and sporadically in non-Jews. Previous studies estimated that this is a founder mutation in Jewish mutation carriers that arose before the dispersion of Jews in the Diaspora ~2500 years ago. The aim of this study was to assess the haplotype in ethnically diverse 185delAG* BRCA1 mutation carriers, and to estimate the age at which the mutation arose. Ethnically diverse Jewish and non-Jewish 185delAG*BRCA1 mutation carriers and their relatives were genotyped using 15 microsatellite markers and three SNPs spanning 12.5 MB, encompassing the BRCA1 gene locus. Estimation of mutation age was based on a subset of 11 markers spanning a region of ~5 MB, using a previously developed algorithm applying the maximum likelihood method. Overall, 188 participants (154 carriers and 34 noncarriers) from 115 families were included: Ashkenazi, Iraq, Kuchin-Indians, Syria, Turkey, Iran, Tunisia, Bulgaria, non-Jewish English, non-Jewish Malaysian, and Hispanics. Haplotype analysis indicated that the 185delAG mutation arose 750-1500 years ago. In Ashkenazim, it is a founder mutation that arose 61 generations ago, and with a small group of founder mutations was introduced into the Hispanic population (conversos) ~650 years ago, and into the Iraqi-Jewish community ~450 years ago. The 185delAG mutation in the non-Jewish populations in Malaysia and the UK arose at least twice independently. We conclude that the 185delAG* BRCA1 mutation resides on a common haplotype among Ashkenazi Jews, and arose about 61 generations ago and arose independently at least twice in non-Jews.
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Affiliation(s)
- Yael Laitman
- The Susanne Levy Gertner Oncogenetics Unit, The Danek Gertner Institute of Human Genetics, Chaim Sheba Medical Center, Tel-Hashomer, Israel
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Diez O, Pelegrí A, Gadea N, Gutiérrez-Enríquez S, Masas M, Tenés A, Bosch N, Balmaña J, Graña B. Novel BRCA1 deleterious mutation (c.1949_1950delTA) in a woman of Senegalese descent with triple-negative early-onset breast cancer. Oncol Lett 2011; 2:1287-1289. [PMID: 22848303 DOI: 10.3892/ol.2011.390] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2011] [Accepted: 08/11/2011] [Indexed: 02/06/2023] Open
Abstract
Limited information exists regarding BRCA1 and BRCA2 genetic testing and genetic diversity in BRCA1 and BRCA2 in sub-Saharan African populations. We report a novel mutation that consists of a deletion of 2 bp (c.1949_1950delTA) in the exon 11 of the BRCA1 gene. This is a frameshift mutation that causes the disruption of the translational reading frame resulting in a premature stop codon downstream in the BRCA1 protein. The mutation was present in a Senegalese woman with a triple-negative breast tumor and a family history of breast cancer.
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Affiliation(s)
- Orland Diez
- Oncogenetics Laboratory, University Hospital Vall d'Hebron, Barcelona
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Abstract
Male breast cancer (MBC) is a rare disease. However, as global populace ages, there is a trend to MBC increasing. Although aetiology is still unclear, constitutional, environmental, hormonal (abnormalities in estrogen/androgen balance) and genetic (positive family history, Klinefelter syndrome, mutations in BRCA1 and specially BRCA2) risk factors are already known. Clinic manifestation is painless hard and fixed nodule in the subareolar region in 75% of cases, with nipple commitment earlier than in women. Breast cancer has similar prognostic factors in males and females, among which axillary adenopathy (present in 40-55% cases) is the most important one. Although mammography, ultrasonography and scintigraphy can be useful tools in diagnosis; clinical assessment, along with a confirmatory biopsy, remains the main step in the evaluation of men with breast lesions. Infiltrating ductal carcinoma is the most frequent histological type. The established standard of care is modified radical mastectomy followed by tamoxifen for endocrine-responsive positive disease, although other options are being explored. While similarities between breast cancer in males and females exist, it is not appropriate to extrapolate data from female disease to the treatment of male. There is a need for specific multi-institutional trials to better understanding of clinicopathologic features and establishment of optimal therapy for this disease.
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MESH Headings
- Breast Neoplasms, Male/diagnosis
- Breast Neoplasms, Male/etiology
- Breast Neoplasms, Male/pathology
- Breast Neoplasms, Male/therapy
- Carcinoma, Ductal, Breast/diagnosis
- Carcinoma, Ductal, Breast/etiology
- Carcinoma, Ductal, Breast/pathology
- Carcinoma, Ductal, Breast/therapy
- Humans
- Male
- Neoplasm Staging
- Prognosis
- Risk Factors
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Affiliation(s)
- Leonardo Oliveira Reis
- School of Medical Sciences, Division of Urologic Oncology, Discipline of Urology, University of Campinas, UNICAMP, Brazil
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31
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Im KM, Kirchhoff T, Wang X, Green T, Chow CY, Vijai J, Korn J, Gaudet MM, Fredericksen Z, Shane Pankratz V, Guiducci C, Crenshaw A, McGuffog L, Kartsonaki C, Morrison J, Healey S, Sinilnikova OM, Mai PL, Greene MH, Piedmonte M, Rubinstein WS, Hogervorst FB, Rookus MA, Collée JM, Hoogerbrugge N, van Asperen CJ, Meijers-Heijboer HEJ, Van Roozendaal CE, Caldes T, Perez-Segura P, Jakubowska A, Lubinski J, Huzarski T, Blecharz P, Nevanlinna H, Aittomäki K, Lazaro C, Blanco I, Barkardottir RB, Montagna M, D'Andrea E, Devilee P, Olopade OI, Neuhausen SL, Peissel B, Bonanni B, Peterlongo P, Singer CF, Rennert G, Lejbkowicz F, Andrulis IL, Glendon G, Ozcelik H, Toland AE, Caligo MA, Beattie MS, Chan S, Domchek SM, Nathanson KL, Rebbeck TR, Phelan C, Narod S, John EM, Hopper JL, Buys SS, Daly MB, Southey MC, Terry MB, Tung N, Hansen TVO, Osorio A, Benitez J, Durán M, Weitzel JN, Garber J, Hamann U, Peock S, Cook M, Oliver CT, Frost D, Platte R, Evans DG, Eeles R, Izatt L, Paterson J, Brewer C, Hodgson S, Morrison PJ, Porteous M, Walker L, Rogers MT, Side LE, Godwin AK, Schmutzler RK, Wappenschmidt B, Laitman Y, Meindl A, Deissler H, Varon-Mateeva R, Preisler-Adams S, Kast K, Venat-Bouvet L, Stoppa-Lyonnet D, Chenevix-Trench G, Easton DF, Klein RJ, Daly MJ, Friedman E, Dean M, Clark AG, Altshuler DM, Antoniou AC, Couch FJ, Offit K, Gold B. Haplotype structure in Ashkenazi Jewish BRCA1 and BRCA2 mutation carriers. Hum Genet 2011; 130:685-99. [PMID: 21597964 DOI: 10.1007/s00439-011-1003-z] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2010] [Accepted: 04/20/2011] [Indexed: 11/26/2022]
Abstract
Three founder mutations in BRCA1 and BRCA2 contribute to the risk of hereditary breast and ovarian cancer in Ashkenazi Jews (AJ). They are observed at increased frequency in the AJ compared to other BRCA mutations in Caucasian non-Jews (CNJ). Several authors have proposed that elevated allele frequencies in the surrounding genomic regions reflect adaptive or balancing selection. Such proposals predict long-range linkage disequilibrium (LD) resulting from a selective sweep, although genetic drift in a founder population may also act to create long-distance LD. To date, few studies have used the tools of statistical genomics to examine the likelihood of long-range LD at a deleterious locus in a population that faced a genetic bottleneck. We studied the genotypes of hundreds of women from a large international consortium of BRCA1 and BRCA2 mutation carriers and found that AJ women exhibited long-range haplotypes compared to CNJ women. More than 50% of the AJ chromosomes with the BRCA1 185delAG mutation share an identical 2.1 Mb haplotype and nearly 16% of AJ chromosomes carrying the BRCA2 6174delT mutation share a 1.4 Mb haplotype. Simulations based on the best inference of Ashkenazi population demography indicate that long-range haplotypes are expected in the context of a genome-wide survey. Our results are consistent with the hypothesis that a local bottleneck effect from population size constriction events could by chance have resulted in the large haplotype blocks observed at high frequency in the BRCA1 and BRCA2 regions of Ashkenazi Jews.
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Affiliation(s)
- Kate M Im
- Center for Cancer Research, Cancer Inflammation Program, Human Genetics Section, National Cancer Institute, Frederick, MD, USA
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On the origin and diffusion of BRCA1 c.5266dupC (5382insC) in European populations. Eur J Hum Genet 2010; 19:300-6. [PMID: 21119707 DOI: 10.1038/ejhg.2010.203] [Citation(s) in RCA: 85] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023] Open
Abstract
The BRCA1 mutation c.5266dupC was originally described as a founder mutation in the Ashkenazi Jewish (AJ) population. However, this mutation is also present at appreciable frequency in several European countries, which raises intriguing questions about the origins of the mutation. We genotyped 245 carrier families from 14 different population groups (Russian, Latvian, Ukrainian, Czech, Slovak, Polish, Danish, Dutch, French, German, Italian, Greek, Brazilian and AJ) for seven microsatellite markers and confirmed that all mutation carriers share a common haplotype from a single founder individual. Using a maximum likelihood method that allows for both recombination and mutational events of marker loci, we estimated that the mutation arose some 1800 years ago in either Scandinavia or what is now northern Russia and subsequently spread to the various populations we genotyped during the following centuries, including the AJ population. Age estimates and the molecular evolution profile of the most common linked haplotype in the carrier populations studied further suggest that c.5266dupC likely entered the AJ gene pool in Poland approximately 400-500 years ago. Our results illustrate that (1) BRCA1 c.5266dupC originated from a single common ancestor and was a common European mutation long before becoming an AJ founder mutation and (2) the mutation is likely present in many additional European countries where genetic screening of BRCA1 may not yet be common practice.
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Case studies in the co-production of populations and genetics: The making of ‘at risk populations’ in BRCA genetics. BIOSOCIETIES 2010. [DOI: 10.1057/biosoc.2010.27] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
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Breast and ovarian cancer risk evaluation in families with a disease-causing mutation in BRCA1/2. J Community Genet 2010; 1:91-9. [PMID: 22460208 DOI: 10.1007/s12687-010-0014-0] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2010] [Accepted: 07/28/2010] [Indexed: 10/19/2022] Open
Abstract
Germline mutations in BRCA1 and BRCA2 confer high risks of breast and ovarian cancer, and their identification allows genetic testing of at-risk relatives. However, estimates of these risks illustrate controversies, depending on the published series. The penetrance, the earlier onset of the disease and the effect of mutations on the risk of developing breast and ovarian cancer were evaluated in 344 females belonging to 34 families from the Basque Country in Spain, in which BRCA1 or BRCA2 mutations were transmitted. Kaplan-Meier survival curves were used to derive cumulative probability curves for breast and ovarian cancer by mutation status, birth cohort and mutation position, and significance of the differences was assessed using the log-rank test. The estimated probability for breast cancer by age 70 is about 64% in BRCA1 and 69% in BRCA2, whereas the probability of developing ovarian cancer is about 37% and 25% for BRCA1 and BRCA2, respectively. There is a marginally significant higher risk of developing ovarian cancer in BRCA1 families than in BRCA2 families. The effect of birth cohort on breast cancer cumulative incidence presents an increased risk for females born after 1966 and a decreased risk for those born before 1940. There is no association between mutation position and breast cancer; however, ovarian cancer is associated to BRCA1, presenting exon 11 as an ovarian cluster. These results are important for the breast and ovarian cancer diagnosis and prevention in at-risk families.
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Greenwood CMT, Sun S, Veenstra J, Hamel N, Niell B, Gruber S, Foulkes WD. How old is this mutation? - a study of three Ashkenazi Jewish founder mutations. BMC Genet 2010; 11:39. [PMID: 20470408 PMCID: PMC2889843 DOI: 10.1186/1471-2156-11-39] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2009] [Accepted: 05/14/2010] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Several founder mutations leading to increased risk of cancer among Ashkenazi Jewish individuals have been identified, and some estimates of the age of the mutations have been published. A variety of different methods have been used previously to estimate the age of the mutations. Here three datasets containing genotype information near known founder mutations are reanalyzed in order to compare three approaches for estimating the age of a mutation. The methods are: (a) the single marker method used by Risch et al., (1995); (b) the intra-allelic coalescent model known as DMLE, and (c) the Goldgar method proposed in Neuhausen et al. (1996), and modified slightly by our group. The three mutations analyzed were MSH2*1906 G->C, APC*I1307K, and BRCA2*6174delT. RESULTS All methods depend on accurate estimates of inter-marker recombination rates. The modified Goldgar method allows for marker mutation as well as recombination, but requires prior estimates of the possible haplotypes carrying the mutation for each individual. It does not incorporate population growth rates. The DMLE method simultaneously estimates the haplotypes with the mutation age, and builds in the population growth rate. The single marker estimates, however, are more sensitive to the recombination rates and are unstable. Mutation age estimates based on DMLE are 16.8 generations for MSH2 (95% credible interval (13, 23)), 106 generations for I1037K (86-129), and 90 generations for 6174delT (71-114). CONCLUSIONS For recent founder mutations where marker mutations are unlikely to have occurred, both DMLE and the Goldgar method can give good results. Caution is necessary for older mutations, especially if the effective population size may have remained small for a long period of time.
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Affiliation(s)
- Celia M T Greenwood
- Genetics and Genome Biology, Hospital for Sick Children Research Institute, Toronto, Ontario, Canada
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36
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Two founder BRCA2 mutations predispose to breast cancer in young women. Breast Cancer Res Treat 2009; 122:567-71. [PMID: 19949853 DOI: 10.1007/s10549-009-0661-1] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2009] [Accepted: 11/19/2009] [Indexed: 10/20/2022]
Abstract
The mutation spectrum of BRCA1 and BRCA2 presents a wide range of unique mutations in breast/ovarian cancer patients but recurrent mutations with founder effects have also been described. BRCA2 5344delAATA and 9538delAA are recurrent mutations in Castilla-León (Spain) representing 10.6% of BRCA2 positive families. By genotyping eleven chromosome 13 markers (4.3 Mb) we demonstrate that each mutation shows core haplotypes of 1.66 and 0.87 Mb, respectively, supporting a common ancestor in Castilla-León. Furthermore, both mutations are associated with earlier onset of breast cancer (5344delAATA: 37.4 years, P = 0.033; 9538delAA: 39.4 years, P = 0.008). The identification of founder effects improves the genetic screening strategy to be followed and facilitates the clinical management of asymptomatic carriers.
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37
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Infante M, Durán M, Acedo A, Pérez-Cabornero L, Sanz DJ, García-González M, Beristain E, Esteban-Cardeñosa E, de la Hoya M, Teulé A, Vega A, Tejada MI, Lastra E, Miner C, Velasco EA. BRCA1 5272-1G>A and BRCA2 5374delTATG are founder mutations of high relevance for genetic counselling in breast/ovarian cancer families of Spanish origin. Clin Genet 2009; 77:60-9. [PMID: 19912264 DOI: 10.1111/j.1399-0004.2009.01272.x] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The distribution of BRCA1 and BRCA2 germ line mutations in breast/ovarian cancer families varies among different populations, which typically present a wide spectrum of unique mutations. Splicing mutation 5272-1G>A of BRCA1 and frameshift mutation 5374delTATG of BRCA2 are highly prevalent mutations in Castilla-León (Spain), accounting for 18.4% and 13.6% of BRCA1 and BRCA2 positive families, respectively. To test the presence of founder effects, 9 Spanish 5272-1G>A and 13 5374delTATG families were genotyped with polymorphic markers linked to BRCA1 or BRCA2. All the 5272-1G>A families shared a common haplotype in eight markers (1.1 Mb region) and the mutation age was estimated in 15 generations (approximately 380 years). A conserved haplotype associated to 5374delTATG was observed in four markers (0.82 Mb). The mutation occurred approximately 48 generations ago (approximately 1200 years). Each mutation likely arose from a common ancestor that could be traced to a small area of Castilla-León and expanded to other Spanish regions. They can have a significant impact on the clinical management of asymptomatic carriers as well as on the genetic screening strategy to be followed in populations with Spanish ancestries.
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Affiliation(s)
- M Infante
- Grupo de Genética del Cáncer, Instituto de Biología y Genética Molecular (UVa-CSIC), Valladolid
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38
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Al-Mulla F, Bland JM, Serratt D, Miller J, Chu C, Taylor GT. Age-dependent penetrance of different germline mutations in the BRCA1 gene. J Clin Pathol 2009; 62:350-6. [PMID: 19329713 PMCID: PMC2656651 DOI: 10.1136/jcp.2008.062646] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Aims: BRCA1 gene mutations have been extensively studied in relation to breast and ovarian cancer susceptibility. Various genotype–phenotype correlation attempts have yielded important data pertaining to the consequences of BRCA1 mutations. However, little is known about the effects of recurrent BRCA mutations on expressivity and the age of onset of cancer in a population. This study addresses whether different exon mutations have variable expressivity especially in relation to the age of onset of breast cancer. Methods: Using a step-wise systematic approach, culminating in the sequencing of all BRCA1 and BRCA2 exons with the addition of multiplex ligation-dependent probe amplification, the relationship between disease phenotypes and gene mutations in 219 individuals and their family members was examined. Results: It is shown that different BRCA1 gene mutations have distinct effects that influence the age of onset of breast or ovarian cancer. Mutations in exon 2 of the BRCA1 gene had significantly lower penetrance compared with mutations of exons 11, 13 and 20. The median age of affliction with breast cancer was 55 years for 185delAG in exon 2 (95% confidence interval (CI) 46.7 to 59.5), 47 years for the 4184delTCAA mutation in exon 11 (95% CI 39 to 55.4), and 41 years for exon 13 duplication (95% CI 32.9 to 49.7) of the BRCA1 gene. Moreover, 14 novel mutations in BRCA1 and BRCA2 genes in the Yorkshire/Humberside population were identified. Conclusions: The 185delAG mutation of the BRCA1 gene is a low penetrance mutation that is age dependent especially when compared with the exon 13 duplication mutation. The data have important ramifications on screening, genetic counselling and prophylactic treatment of BRCA1 gene mutation carriers.
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Ramus SJ, Gayther SA. The contribution of BRCA1 and BRCA2 to ovarian cancer. Mol Oncol 2009; 3:138-50. [PMID: 19383375 PMCID: PMC5527889 DOI: 10.1016/j.molonc.2009.02.001] [Citation(s) in RCA: 154] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2009] [Revised: 02/01/2009] [Accepted: 02/02/2009] [Indexed: 12/24/2022] Open
Abstract
Germline mutations of the BRCA1 and BRCA2 genes confer a high life-time risk of ovarian cancer. They represent the most significant and well characterised genetic risk factors so far identified for the disease. The frequency with which BRCA1/2 mutations occur in families containing multiple cases of ovarian cancer or breast and ovarian cancer, and in population-based ovarian cancer series varies geographically and between different ethnic groups. There are differences in the frequency of common mutations and in the presence of specific founder mutations in different populations. BRCA1 and BRCA2 are responsible for half of all families containing two or more ovarian cancer cases. In population-based studies, BRCA1 and BRCA2 mutations are present in 5-15% of all ovarian cancer cases. Often, individuals in which mutations are identified in unselected cases have no family history of either ovarian or breast cancer. The ability to identify BRCA1/2 mutations has been one of the few major success stories over the last few years in the clinical management of ovarian cancer. Currently, unaffected individuals can be screened for mutations if they have a family history of the disease. If a mutation is identified in the family, and if an individual is found be a mutation carrier, they can be offered clinical intervention strategies that can dramatically reduce their ovarian cancer risks. In some populations with frequent founder mutations screening may not be dependent on whether a mutation is identified in an affected relative.
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Affiliation(s)
- Susan J Ramus
- Gynaecological Cancer Research Laboratory, UCL EGA Institute for Women's Health, Paul O'Gorman Building, University College London, 72 Huntley Street, London, United Kingdom
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40
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Chen PL, Avramopoulos D, Lasseter VK, McGrath JA, Fallin MD, Liang KY, Nestadt G, Feng N, Steel G, Cutting AS, Wolyniec P, Pulver AE, Valle D. Fine mapping on chromosome 10q22-q23 implicates Neuregulin 3 in schizophrenia. Am J Hum Genet 2009; 84:21-34. [PMID: 19118813 DOI: 10.1016/j.ajhg.2008.12.005] [Citation(s) in RCA: 75] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2008] [Revised: 06/24/2008] [Accepted: 12/08/2008] [Indexed: 11/15/2022] Open
Abstract
Linkage studies have implicated 10q22-q23 as a schizophrenia (SZ) susceptibility locus in Ashkenazi Jewish (AJ) and Han Chinese from Taiwan populations. To further explore our previous linkage signal in the AJ population (NPL score: 4.27, empirical p = 2 x 10(-5)), we performed a peakwide association fine mapping study by using 1414 SNPs across approximately 12.5 Mb in 10q22-q23. We genotyped 1515 AJ individuals, including 285 parent-child trios, 173 unrelated cases, and 487 unrelated controls. We analyzed the binary diagnostic phenotype of SZ and 9 heritable quantitative traits derived from a principal components factor analysis of 73 items from our consensus diagnostic ratings and direct assessment interviews. Although no marker withstood multiple test correction for association with the binary SZ phenotype, we found strong evidence of association by using the "delusion" factor as the quantitative trait at three SNPs (rs10883866, rs10748842, and rs6584400) located in a 13 kb interval in intron 1 of Neuregulin 3 (NRG3). Our best p value from family-based association analysis was 7.26 x 10(-7). We replicated this association in the collection of 173 unrelated AJ cases (p = 1.55 x 10(-2)), with a combined p value of 2.30 x 10(-7). After performing 10,000 permutations of each of the phenotypes, we estimated the empirical study-wide significance across all 9 factors (90,000 permutations) to be p = 2.7 x 10(-3). NRG3 is primarily expressed in the central nervous system and is one of three paralogs of NRG1, a gene strongly implicated in SZ. These biological properties together with our linkage and association results strongly support NRG3 as a gene involved in SZ.
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Affiliation(s)
- Pei-Lung Chen
- McKusick-Nathans Institute of Genetic Medicine, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA
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41
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Ostrander EA, Udler MS. The role of the BRCA2 gene in susceptibility to prostate cancer revisited. Cancer Epidemiol Biomarkers Prev 2008; 17:1843-8. [PMID: 18708369 DOI: 10.1158/1055-9965.epi-08-0556] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
Prostate cancer is a genetically complex disease with multiple predisposing factors affecting presentation, progression, and outcome. Epidemiologic studies have long shown an aggregation of breast and prostate cancer in some families. More recently, studies have reported an apparent excess of prostate cancer cases among BRCA2 mutation-carrying families. Additionally, population-based screens of early-onset prostate cancer patients have suggested that the prevalence of deleterious BRCA2 mutations in this group is 1% to 2%, imparting a significantly increased risk of the disease compared with noncarrier cases. However, studies of high-risk prostate cancer families suggest that BRCA2 plays at most a minimal role in these individuals, highlighting the potential genetic heterogeneity of the disease. In this commentary, we review the current literature and hypotheses surrounding the relationship between BRCA2 mutations and susceptibility to prostate cancer and speculate on the potential for involvement of additional genes.
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Affiliation(s)
- Elaine A Ostrander
- Cancer Genetic Branch, National Human Genome Research Institute, NIH, Room 52451, Building 50, Bethesda, MD 20892, USA.
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42
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Ashton-Prolla P, Bakos L, Junqueira G, Giugliani R, Azevedo SJ, Hogg D. Clinical and Molecular Characterization of Patients at Risk for Hereditary Melanoma in Southern Brazil. J Invest Dermatol 2008; 128:421-5. [PMID: 17713569 DOI: 10.1038/sj.jid.5701030] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Melanoma is the most dangerous of all common skin cancers, due to its propensity to metastasize. Therefore, identification of at-risk populations may allow early detection of disease at a curable stage. In Europe and North America, between 8-14% of melanoma patients have a family history of the disease, and a subset of these individuals possess germline mutations in the CDKN2A gene, which encodes the p16(INK4A) and p14(ARF) tumor suppressors. We identified 30 patients (29 families) from Southern Brazil, who had a family history of melanoma and/or pancreatic cancer; or a personal history of multiple primary melanoma. We screened this cohort for mutations in the CDKN2A and CDK4 genes, and detected two functional mutations: a G-34T transversion in 5'untranslated region; and a M53I alteration encoded in exon 2. Both mutants have been previously associated with melanoma and demonstrate founder effects. We conclude that germline mutations of CDKN2A occur in the Brazilian population, and that these mutations likely originated in Europe.
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Affiliation(s)
- Patricia Ashton-Prolla
- Post-Graduate Course in Genetics and Molecular Biology, Federal University of Rio Grande do Sul, Brazil.
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43
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Miramar MD, Calvo MT, Rodriguez A, Antón A, Lorente F, Barrio E, Herrero A, Burriel J, García de Jalón A. Genetic analysis of BRCA1 and BRCA2 in breast/ovarian cancer families from Aragon (Spain): two novel truncating mutations and a large genomic deletion in BRCA1. Breast Cancer Res Treat 2008; 112:353-8. [PMID: 18176857 DOI: 10.1007/s10549-007-9868-1] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2007] [Accepted: 12/11/2007] [Indexed: 11/30/2022]
Abstract
We screened BRCA1 and BRCA2 germline mutations in 60 high-risk breast and/or ovarian cancer patients and 20 relatives from Aragon (Spain) by DHPLC (Denaturing High Performance Liquid Chromatography) and direct sequencing of the entire coding sequence and the splicing sites of both genes. We have identified 17 different pathogenic mutations: 8 in BRCA1 and 9 in BRCA2 in 60 unrelated patients and 50% of relatives were carriers. The prevalence of pathogenic mutations in this study was 33.33%. Two truncating mutations are novel: c.5024_5025delGA in exon 16 of BRCA1 and c.2929delC in exon 11 of BRCA2 (numbered after GenBank U14680 and U43746). Multiplex Ligation Dependent Probe Amplification (MLPA) was performed for large mutational scanning of both genes and a large genomic deletion in BRCA1 was found (DelEx8-13). Furthermore, five mutations are described for the first time in Spanish population: c.1191delC, c.3478_3479delTT and c.6633_6637delCTTAA (BRCA1) and c.3972_3975delTGAG and 3908_3909delTG (BRCA2). Three mutations have been reported previously once in Spain: c.3600_3610del11 (BRCA1), c.5804_5807delTTAA (BRCA2) and c.9246C>A (BRCA2). The mutation c.5374_5377delTATG has been found before only in two unrelated families from Castilla-Leon, Spain (BRCA2). Frequent mutations described in Spanish population have also been present: c.187_188delAG, c.5242C>A and c.5385insC in BRCA1 and c.3492_3493insT and c.9254_9258delATCAT in BRCA2. c.5242C>A, 3972_3975delTGAG and c.5804_5807delTTAA were the recurrent mutations found. Fifteen different unclassified variants were identified (25% families). Although specific BRCA1 and BRCA2 mutations are recurrently reported as a result of genetic founder effects we conclude that heterogeneous ethnicity increases the variety of mutations that can be found in Spanish populations.
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Affiliation(s)
- M D Miramar
- Medical Genetics Unit, Biochemistry Service, Miguel Servet Hospital, Zaragoza, Spain.
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44
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Abstract
Germline mutations in the BRCA1 or BRCA2 tumour-suppressor genes are strong predictors of breast and/or ovarian cancer development. The contribution of these mutations to breast cancer risk within any specific population is a function of both their prevalence and their penetrance. Mutation prevalence varies among ethnic groups and may be influenced by founder mutations. Penetrance can be influenced by mutation-specific phenotypes and the potential modifying effects of the patient's own genetic and environmental background. Although estimates of both mutation prevalence and mutation penetrance rates are inconsistent and occasionally controversial, understanding them is crucial for providing accurate risk information to each patient.
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Affiliation(s)
- James D Fackenthal
- Department of Medicine and Center for Clinical Cancer Genetics, University of Chicago, Box MC2115, 5841 S. Maryland Avenue, Chicago, Illinois 60615, USA
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45
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Similar prevalence of founder BRCA1 and BRCA2 mutations among Ashkenazi and non-Ashkenazi men with breast cancer: evidence from 261 cases in Israel, 1976-1999. Eur J Med Genet 2007; 51:141-7. [PMID: 18158280 DOI: 10.1016/j.ejmg.2007.11.001] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2007] [Accepted: 11/07/2007] [Indexed: 11/22/2022]
Abstract
To evaluate the potential contribution of mutations in the BRCA1 and BRCA2 genes to male breast cancer (MBC), we expanded a previous study to screen a total of 261 Israeli men diagnosed with breast carcinoma. A total of 21 BRCA2 6174delT and 8 BRCA1 185delAG mutations were found. Similar frequencies of BRCA1 and BRCA2 mutation carriers were found among Ashkenazi (12.8%) and non-Ashkenazi Jews (9.1%). The combined prevalence of BRCA1/BRCA2 founder mutations among Ashkenazi Jewish men is slightly higher than for women, due to a higher frequency of BRCA2 mutations.
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Yarden RI, Friedman E, Metsuyanim S, Olender T, Ben-Asher E, Papa MZ. MDM2 SNP309 accelerates breast and ovarian carcinogenesis in BRCA1 and BRCA2 carriers of Jewish-Ashkenazi descent. Breast Cancer Res Treat 2007; 111:497-504. [PMID: 18026875 DOI: 10.1007/s10549-007-9797-z] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2007] [Accepted: 10/12/2007] [Indexed: 01/29/2023]
Abstract
A functional single nucleotide polymorphism in the promoter of the MDM2 gene, SNP309 (T>G), was recently found to accelerate tumorigenesis in early onset cancer cases. The SNP309 G-allele, introduces an SP1 site in the MDM2 promoter, resulting in enhanced MDM2 expression and activity. Thus, the G-allele of MDM2 SNP309 may represent a cancer predisposing allele. In this report, we assessed the role of SNP309 as a modifier of mutant BRCA1/BRCA2 alleles in inherited breast and ovarian cancer cases among Ashkenazi-Jewish (AJ) women. We genotyped several subsets of AJ women: 138 healthy women, 140 affected BRCA1/2 mutation carriers, 120 asymptomatic BRCA1/2 mutation carriers and 187 sporadic breast cancer patients. The frequency of GG genotype of SNP309 was similar among the different groups. Interestingly, we found almost three times higher frequency of the GG genotype among BRCA1/2 carriers diagnosed with breast and/or ovarian cancer at or under the age of 51 years compared with carriers diagnosed with cancer above the age of 51 years (allele frequency, P = 0.019). The GG genotype was significantly associated with breast and ovarian cancer risk among BRCA1/2 carriers diagnosed before 51 years of age (OR, 3.93; 95% CI, 1.41-10.90, P = 0.009). No significant difference in frequency of the GG genotype was observed between early and late onset non-carrier cancer patients and no association with risk, OR, 1.30; 95% CI 0.69-2.47, P = 0.419). These data suggest that MDM2 SNP309 acts as a modifier of mutant BRCA1/2 mutant alleles in AJ and may accelerate breast and ovarian carcinogenesis in genetically predisposed individuals.
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Affiliation(s)
- Ronit I Yarden
- Laboratory of Genomic Applications, Sheba Medical Center, Tel-Hashomer, 52621, Israel
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Hartikainen JM, Kataja V, Pirskanen M, Arffman A, Ristonmaa U, Vahteristo P, Ryynänen M, Heinonen S, Kosma VM, Mannermaa A. Screening for BRCA1 and BRCA2 mutations in Eastern Finnish breast/ovarian cancer families. Clin Genet 2007; 72:311-20. [PMID: 17850627 DOI: 10.1111/j.1399-0004.2007.00866.x] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Familial aggregation is thought to account for 5-10% of all breast cancer cases, and high penetrance breast and ovarian cancer susceptibility genes BRCA1 and BRCA2 explain < or =20% of these. Hundreds of mutations among breast/ovarian cancer families have been found in these two genes. The mutation spectrum and prevalence, however, varies widely among populations. Thirty-six breast/ovarian cancer families were identified from a population sample of breast and ovarian cancer cases among a relatively isolated population in Eastern Finland, and the frequency of BRCA1/BRCA2 germline mutations were screened using heteroduplex analysis, protein truncation test and sequencing. Five different mutations were detected in seven families (19.4%). Two mutations were found in BRCA1 and three in BRCA2. One of the mutations (BRCA2 4088insA) has not been detected elsewhere in Finland while the other four, 4216-2nt A-->G and 5370 C-->T in BRCA1 and 999del5 and 6503delTT in BRCA2, are recurrent Finnish founder mutations. These results add to the evidence of the geographical differences in distribution of Finnish BRCA1/BRCA2 mutations. This screen also provides further evidence for the presumption that the majority of Finnish BRCA1/BRCA2 founder mutations have been found and that the proportion of BRCA1/BRCA2 mutations in Finnish breast/ovarian cancer families is around 20%.
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Affiliation(s)
- J M Hartikainen
- Institute of Clinical Medicine, Pathology and Forensic Medicine, University of Kuopio, Kuopio, Finland.
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48
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Anagnostopoulos T, Pertesi M, Konstantopoulou I, Armaou S, Kamakari S, Nasioulas G, Athanasiou A, Dobrovic A, Young MA, Goldgar D, Fountzilas G, Yannoukakos D. G1738R is a BRCA1 founder mutation in Greek breast/ovarian cancer patients: evaluation of its pathogenicity and inferences on its genealogical history. Breast Cancer Res Treat 2007; 110:377-85. [PMID: 17902052 DOI: 10.1007/s10549-007-9729-y] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2007] [Accepted: 08/01/2007] [Indexed: 01/16/2023]
Abstract
We have performed screening in 287 breast/ovarian cancer families in Greece which has revealed that approximately 12% (8/65) of all index patients-carriers of a deleterious mutation in BRCA1 and BRCA2 genes, contain the base substitution G to A at position 5331 of BRCA1 gene. This generates the amino acid change G1738R for which based on a combination of genetic, in silico and histopathological analysis there are strong suggestions that it is a causative mutation. In this paper, we present further evidence suggesting the pathogenicity of this variant. Forty breast/ovarian cancer patients were reported in 11 Greek families: the above eight living in Greece, two living in Australia and one in USA, all containing G1738R. Twenty of these patients were screened and were all found to be carriers of the same base substitution. In addition, we have detected the same base change in five breast/ovarian cancer patients after screening 475 unselected patient samples with no apparent family history. The mean age of onset for all the above patients was 39.4 and 53.6 years for breast and ovarian cancer cases, respectively. A multi-factorial likelihood model for classification of unclassified variants in BRCA1 and BRCA2 developed previously was applied on G1738R and the odds of it being a deleterious mutation was estimated to be 11470:1. In order to explain the prevalence of this mutation mainly in the Greek population, its genealogical history was examined. DNA samples were collected from 11 carrier families living in Greece, Australia and USA. Screening of eight intragenic SNPs, three intragenic and seven extragenic microsatellite markers and comparison with control individuals, suggested a common origin for the mutation while the time to its most recent common ancestor was estimated to be 11 generations (about 275 years assuming a generational interval of 25 years) with a 1-lod support interval of 4-24 generations (100-600 years). Considering the large degree of genetic heterogeneity in the Greek population, the identification of a frequent founder mutation greatly facilitates genetic screening.
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Affiliation(s)
- Theodore Anagnostopoulos
- Molecular Diagnostics Laboratory, IRRP, National Centre for Scientific Research Demokritos, Aghia Paraskevi, Athens, Greece
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Monne M, Piras G, Fancello P, Santona MC, Uras A, Landriscina G, Mastio G, Gabbas A. Identification of a founder BRCA2 mutation in Sardinian breast cancer families. Fam Cancer 2007; 6:73-9. [PMID: 17216544 DOI: 10.1007/s10689-006-9107-7] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2005] [Accepted: 09/22/2006] [Indexed: 10/23/2022]
Abstract
The population of Sardinia is characterized by a relatively low level of genetic heterogeneity: therefore 'founder mutations' can be expected to be found. We analysed 17 probands from families with high incidence of breast cancer or breast and ovarian cancer by sequencing the full-length coding regions of BRCA1 and BRCA2 genes. A novel BRCA2 frame-shift mutation, 3951del3insAT, which produces a protein truncated at codon 1258, was observed in six patients with BC from the same village. The mutation was not found in unaffected females (matched on basis of ethnicity and age) with no family history of cancer. Haplotype analysis strongly suggests that all affected persons had a common ancestor. The identification of this clinically significant founder mutation may facilitate screening/testing for inherited risk of breast cancer.
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Affiliation(s)
- Maria Monne
- Centro di Diagnostica Biomolecolare e Citogenetica Emato-Oncologica, San Francesco Hospital, ASL3 via Mannironi 1, 08100 Nuoro, Italy.
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Weitzel JN, Lagos VI, Herzog JS, Judkins T, Hendrickson B, Ho JS, Ricker CN, Lowstuter KJ, Blazer KR, Tomlinson G, Scholl T. Evidence for common ancestral origin of a recurring BRCA1 genomic rearrangement identified in high-risk Hispanic families. Cancer Epidemiol Biomarkers Prev 2007; 16:1615-20. [PMID: 17646271 DOI: 10.1158/1055-9965.epi-07-0198] [Citation(s) in RCA: 73] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
BACKGROUND Large rearrangements account for 8% to 15% of deleterious BRCA mutations, although none have been characterized previously in individuals of Mexican ancestry. METHODS DNA from 106 Hispanic patients without an identifiable BRCA mutation by exonic sequence analysis was subjected to multiplexed quantitative differential PCR. One case of Native American and African American ancestry was identified via multiplex ligation-dependent probe amplification. Long-range PCR was used to confirm deletion events and to clone and sequence genomic breakpoints. Splicing patterns were derived by sequencing cDNA from reverse transcription-PCR of lymphoblastoid cell line RNA. Haplotype analysis was conducted for recurrent mutations. RESULTS The same deletion of BRCA1 exons 9 through 12 was identified in five unrelated families. Long-range PCR and sequencing indicated a deletion event of 14.7 kb. A 3-primer PCR assay was designed based on the deletion breakpoints, identified within an AluSp element in intron 8 and an AluSx element in intron 12. Haplotype analysis confirmed common ancestry. Analysis of cDNA showed direct splicing of exons 8 to 13, resulting in a frameshift mutation and predicted truncation of the BRCA1 protein. CONCLUSIONS We identified and characterized a novel large BRCA1 deletion in five unrelated families-four of Mexican ancestry and one of African and Native American ancestry, suggesting the possibility of founder effect of Amerindian or Mestizo origin. This BRCA1 rearrangement was detected in 3.8% (4 of 106) of BRCA sequence-negative Hispanic families. An assay for this mutation should be considered for sequence-negative high-risk Hispanic patients.
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Affiliation(s)
- Jeffrey N Weitzel
- Department of Clinical Cancer Genetics, City of Hope, 1500 East Duarte Road, Duarte, CA 91010, USA.
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