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O'Mahony DG, Ramus SJ, Southey MC, Meagher NS, Hadjisavvas A, John EM, Hamann U, Imyanitov EN, Andrulis IL, Sharma P, Daly MB, Hake CR, Weitzel JN, Jakubowska A, Godwin AK, Arason A, Bane A, Simard J, Soucy P, Caligo MA, Mai PL, Claes KBM, Teixeira MR, Chung WK, Lazaro C, Hulick PJ, Toland AE, Pedersen IS, Neuhausen SL, Vega A, de la Hoya M, Nevanlinna H, Dhawan M, Zampiga V, Danesi R, Varesco L, Gismondi V, Vellone VG, James PA, Janavicius R, Nikitina-Zake L, Nielsen FC, van Overeem Hansen T, Pejovic T, Borg A, Rantala J, Offit K, Montagna M, Nathanson KL, Domchek SM, Osorio A, García MJ, Karlan BY, De Fazio A, Bowtell D, McGuffog L, Leslie G, Parsons MT, Dörk T, Speith LM, Dos Santos ES, da Costa AABA, Radice P, Peterlongo P, Papi L, Engel C, Hahnen E, Schmutzler RK, Wappenschmidt B, Easton DF, Tischkowitz M, Singer CF, Tan YY, Whittemore AS, Sieh W, Brenton JD, Yannoukakos D, Fostira F, Konstantopoulou I, Soukupova J, Vocka M, Chenevix-Trench G, Pharoah PDP, Antoniou AC, Goldgar DE, Spurdle AB, Michailidou K. Ovarian cancer pathology characteristics as predictors of variant pathogenicity in BRCA1 and BRCA2. Br J Cancer 2023; 128:2283-2294. [PMID: 37076566 PMCID: PMC10241792 DOI: 10.1038/s41416-023-02263-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2022] [Revised: 02/22/2023] [Accepted: 03/24/2023] [Indexed: 04/21/2023] Open
Abstract
BACKGROUND The distribution of ovarian tumour characteristics differs between germline BRCA1 and BRCA2 pathogenic variant carriers and non-carriers. In this study, we assessed the utility of ovarian tumour characteristics as predictors of BRCA1 and BRCA2 variant pathogenicity, for application using the American College of Medical Genetics and the Association for Molecular Pathology (ACMG/AMP) variant classification system. METHODS Data for 10,373 ovarian cancer cases, including carriers and non-carriers of BRCA1 or BRCA2 pathogenic variants, were collected from unpublished international cohorts and consortia and published studies. Likelihood ratios (LR) were calculated for the association of ovarian cancer histology and other characteristics, with BRCA1 and BRCA2 variant pathogenicity. Estimates were aligned to ACMG/AMP code strengths (supporting, moderate, strong). RESULTS No histological subtype provided informative ACMG/AMP evidence in favour of BRCA1 and BRCA2 variant pathogenicity. Evidence against variant pathogenicity was estimated for the mucinous and clear cell histologies (supporting) and borderline cases (moderate). Refined associations are provided according to tumour grade, invasion and age at diagnosis. CONCLUSIONS We provide detailed estimates for predicting BRCA1 and BRCA2 variant pathogenicity based on ovarian tumour characteristics. This evidence can be combined with other variant information under the ACMG/AMP classification system, to improve classification and carrier clinical management.
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Affiliation(s)
- Denise G O'Mahony
- Biostatistics Unit, The Cyprus Institute of Neurology and Genetics, Nicosia, 2371, Cyprus
- Department of Cancer Genetics, Therapeutics and Ultrastructural Pathology, The Cyprus Institute of Neurology and Genetics, Nicosia, 2371, Cyprus
| | - Susan J Ramus
- School of Clinical Medicine, University of New South Wales Medicine and Health, University of New South Wales Sydney, Sydney, NSW, 2052, Australia
- Adult Cancer Program, Lowy Cancer Research Centre, University of New South Wales Sydney, Sydney, NSW, 2052, Australia
| | - Melissa C Southey
- Precision Medicine, School of Clinical Sciences at Monash Health, Monash University, Clayton, VIC, 3168, Australia
- Department of Clinical Pathology, The University of Melbourne, Melbourne, VIC, 3010, Australia
- Cancer Epidemiology Division, Cancer Council Victoria, Melbourne, VIC, 3004, Australia
| | - Nicola S Meagher
- School of Clinical Medicine, University of New South Wales Medicine and Health, University of New South Wales Sydney, Sydney, NSW, 2052, Australia
- Adult Cancer Program, Lowy Cancer Research Centre, University of New South Wales Sydney, Sydney, NSW, 2052, Australia
- The Daffodil Centre, The University of Sydney, a joint venture with Cancer Council NSW, Sydney, NSW, Australia
| | - Andreas Hadjisavvas
- Department of Cancer Genetics, Therapeutics and Ultrastructural Pathology, The Cyprus Institute of Neurology and Genetics, Nicosia, 2371, Cyprus
| | - Esther M John
- Department of Epidemiology and Population Health, Stanford University School of Medicine, Stanford, CA, 94305, USA
- Department of Medicine, Division of Oncology, Stanford Cancer Institute, Stanford University School of Medicine, Stanford, CA, 94304, USA
| | - Ute Hamann
- Molecular Genetics of Breast Cancer, German Cancer Research Center (DKFZ), Heidelberg, 69120, Germany
| | | | - Irene L Andrulis
- Fred A. Litwin Center for Cancer Genetics, Lunenfeld-Tanenbaum Research Institute of Mount Sinai Hospital, Toronto, ON, M5G 1×5, Canada
- Department of Molecular Genetics, University of Toronto, Toronto, ON, M5S 1A8, Canada
| | - Priyanka Sharma
- Department of Internal Medicine, Division of Medical Oncology, University of Kansas Medical Center, Westwood, KS, 66205, USA
| | - Mary B Daly
- Department of Clinical Genetics, Fox Chase Cancer Center, Philadelphia, PA, 19111, USA
| | | | | | - Anna Jakubowska
- Department of Genetics and Pathology, International Hereditary Cancer Center, Pomeranian Medical University, Szczecin, 171-252, Poland
- Independent Laboratory of Molecular Biology and Genetic Diagnostics, Pomeranian Medical University, Szczecin, 171-252, Poland
| | - Andrew K Godwin
- Department of Pathology and Laboratory Medicine, The University of Kansas Medical Center, Kansas City, KS, 66160, USA
| | - Adalgeir Arason
- Department of Pathology, Landspitali University Hospital, Reykjavik, 101, Iceland
- BMC (Biomedical Centre), Faculty of Medicine, University of Iceland, Reykjavik, 101, Iceland
| | - Anita Bane
- Department of Pathology & Molecular Medicine, Juravinski Hospital and Cancer Centre, McMaster University, Hamilton, ON, L8V 1C3, Canada
| | - Jacques Simard
- Genomics Center, Centre Hospitalier Universitaire de Québec - Université Laval Research Center, Québec City, QC, G1V 4G2, Canada
| | - Penny Soucy
- Genomics Center, Centre Hospitalier Universitaire de Québec - Université Laval Research Center, Québec City, QC, G1V 4G2, Canada
| | - Maria A Caligo
- SOD Genetica Molecolare, University Hospital, Pisa, 56126, Italy
| | - Phuong L Mai
- Magee-Womens Hospital, University of Pittsburgh School of Medicine, Pittsburgh, PA, 15213, USA
| | | | - Manuel R Teixeira
- Department of Laboratory Genetics, Portuguese Oncology Institute of Porto (IPO Porto)/Comprehensive Cancer Center, Porto, 4200-072, Portugal
- School of Medicine and Biomedical Sciences Institute (ICBAS), University of Porto, Porto, 4050-013, Portugal
| | - Wendy K Chung
- Departments of Pediatrics and Medicine, Columbia University, New York, NY, 10032, USA
| | - Conxi Lazaro
- Hereditary Cancer Program, ONCOBELL-IDIBELL-IGTP, Catalan Institute of Oncology, CIBERONC, Barcelona, 08908, Spain
| | - Peter J Hulick
- Center for Medical Genetics, NorthShore University HealthSystem, Evanston, IL, 60201, USA
- The University of Chicago Pritzker School of Medicine, Chicago, IL, 60637, USA
| | - Amanda E Toland
- Department of Cancer Biology and Genetics, The Ohio State University, Columbus, OH, 43210, USA
| | - Inge Sokilde Pedersen
- Molecular Diagnostics, Aalborg University Hospital, Aalborg, 9000, Denmark
- Clinical Cancer Research Center, Aalborg University Hospital, Aalborg, 9000, Denmark
- Department of Clinical Medicine, Aalborg University, Aalborg, 9000, Denmark
| | - Susan L Neuhausen
- Department of Population Sciences, Beckman Research Institute of City of Hope, Duarte, CA, 91010, USA
| | - Ana Vega
- Centro de Investigación en Red de Enfermedades Raras (CIBERER), Madrid, 28029, Spain
- Fundación Pública Galega de Medicina Xenómica, Santiago de Compostela, 15706, Spain
- Instituto de Investigación Sanitaria de Santiago de Compostela (IDIS), Complejo Hospitalario Universitario de Santiago, SERGAS, Santiago de Compostela, 15706, Spain
| | - Miguel de la Hoya
- Molecular Oncology Laboratory, CIBERONC, Hospital Clinico San Carlos, IdISSC (Instituto de Investigación Sanitaria del Hospital Clínico San Carlos), Madrid, 28040, Spain
| | - Heli Nevanlinna
- Department of Obstetrics and Gynecology, Helsinki University Hospital, University of Helsinki, Helsinki, 00290, Finland
| | - Mallika Dhawan
- Cancer Genetics and Prevention Program, University of California San Francisco, San Francisco, CA, 94143-1714, USA
| | - Valentina Zampiga
- Biosciences Laboratory, IRCCS Istituto Romagnolo per lo Studio dei Tumori (IRST) "Dino Amadori", Meldola, Italy
| | - Rita Danesi
- Romagna Cancer Registry, IRCCS Istituto Romagnolo per lo Studio dei Tumori (IRST) "Dino Amadori", Meldola, 47014, Italy
| | - Liliana Varesco
- Unit of Hereditary Cancer, IRCCS Ospedale Policlinico San Martino, Genoa, 16132, Italy
| | - Viviana Gismondi
- Unit of Hereditary Cancer, IRCCS Ospedale Policlinico San Martino, Genoa, 16132, Italy
| | | | - Paul A James
- Department of Gynecology and Obstetrics, Ribeirao Preto Medical School, University of Sao Paulo, Ribeirao Preto, 14049-900, Brazil
| | - Ramunas Janavicius
- Faculty of Medicine, Institute of Biomedical Sciences, Department of Human and Medical Genetics, Vilnius University, Vilnius, LT-03101, Lithuania
- State Research Institute Centre for Innovative Medicine, Vilnius, 8410, Lithuania
| | | | - Finn Cilius Nielsen
- Center for Genomic Medicine, Rigshospitalet, Copenhagen University Hospital, Copenhagen, DK-2100, Denmark
| | - Thomas van Overeem Hansen
- Department of Clinical Genetics, Rigshospitalet, Copenhagen University Hospital, Copenhagen, DK-2100, Denmark
- Department of Clinical Medicine, Faculty of Health and Medical Sciences, , University of Copenhagen, Copenhagen, 2200, Denmark
| | - Tanja Pejovic
- Department of Obstetrics and Gynecology, Oregon Health & Science University, Portland, OR, 97239, USA
- Knight Cancer Institute, Oregon Health & Science University, Portland, OR, 97239, USA
| | - Ake Borg
- Department of Oncology, Lund University and Skåne University Hospital, Lund, 222 41, Sweden
| | - Johanna Rantala
- Clinical Genetics, Karolinska Institutet, Stockholm, 171 76, Sweden
| | - Kenneth Offit
- Clinical Genetics Research Lab, Department of Cancer Biology and Genetics, Memorial Sloan Kettering Cancer Center, New York, NY, 10065, USA
- Clinical Genetics Service, Department of Medicine, Memorial Sloan Kettering Cancer Center, New York, NY, 10065, USA
| | - Marco Montagna
- Immunology and Molecular Oncology Unit, Veneto Institute of Oncology IOV - IRCCS, Padua, 35128, Italy
| | - Katherine L Nathanson
- Basser Center for BRCA, Abramson Cancer Center, University of Pennsylvania, Philadelphia, PA, 19066, USA
| | - Susan M Domchek
- Basser Center for BRCA, Abramson Cancer Center, University of Pennsylvania, Philadelphia, PA, 19066, USA
| | - Ana Osorio
- Human Genetics Group, Spanish National Cancer Research Centre (CNIO), Madrid, 28029, Spain
- Centre for Biomedical Network Research on Rare Diseases (CIBERER), Instituto de Salud Carlos III, Madrid, 28029, Spain
- Genetics Service, Fundación Jiménez Díaz, Madrid, 28040, Spain
| | - María J García
- Computational Oncology Group, Structural Biology Programme, Spanish National Cancer Research Centre (CNIO), Madrid, 28029, Spain
| | - Beth Y Karlan
- David Geffen School of Medicine, Department of Obstetrics and Gynecology, University of California at Los Angeles, Los Angeles, CA, 90095, USA
| | - Anna De Fazio
- The Daffodil Centre, The University of Sydney, a joint venture with Cancer Council NSW, Sydney, NSW, Australia
- Centre for Cancer Research, The Westmead Institute for Medical Research, Sydney, Australia
- Department of Gynaecological Oncology, Westmead Hospital, Sydney, NSW, 2145, Australia
- The University of Sydney, Sydney, NSW, 2145, Australia
| | - David Bowtell
- Peter MacCallum Cancer Centre, Melbourne, VIC, 3000, Australia
- Sir Peter MacCallum Department of Oncology, The University of Melbourne, Melbourne, VIC, 3000, Australia
| | - Lesley McGuffog
- Centre for Cancer Genetic Epidemiology, Department of Public Health and Primary Care, University of Cambridge, Cambridge, CB1 8RN, UK
| | - Goska Leslie
- Centre for Cancer Genetic Epidemiology, Department of Public Health and Primary Care, University of Cambridge, Cambridge, CB1 8RN, UK
| | - Michael T Parsons
- Population Health Program, QIMR Berghofer Medical Research Institute, Brisbane, QLD, 4006, Australia
| | - Thilo Dörk
- Gynaecology Research Unit, Hannover Medical School, Hannover, 30625, Germany
| | - Lisa-Marie Speith
- Gynaecology Research Unit, Hannover Medical School, Hannover, 30625, Germany
| | - Elizabeth Santana Dos Santos
- Service de Génétique, Institut Curie, Paris, 75005, France
- Oncology Center, Hospital Sirio-Libanes, São Paulo, 01308-050, Brazil
- Department of Clinical Oncology, A.C.Camargo Cancer Center, São Paulo, 1509900, Brazil
| | - Alexandre André B A da Costa
- Department of Clinical Oncology, A.C.Camargo Cancer Center, São Paulo, 1509900, Brazil
- Department of Radiation Oncology, Dana-Farber Cancer Institute, Boston, MA, 2215, USA
| | - Paolo Radice
- Unit of Preventive Medicine: Molecular Bases of Genetic Risk, Department of Experimental Oncology, Fondazione IRCCS Istituto Nazionale dei Tumori (INT), Milan, 20133, Italy
| | - Paolo Peterlongo
- Genome Diagnostics Program, IFOM ETS - the AIRC Institute of Molecular Oncology, Milan, 20139, Italy
| | - Laura Papi
- Department of Experimental and Clinical Biomedical Sciences 'Mario Serio', Medical Genetics Unit, University of Florence, Florence, 27571, Italy
| | - Christoph Engel
- Institute for Medical Informatics, Statistics and Epidemiology, University of Leipzig, Leipzig, 04107, Germany
- LIFE - Leipzig Research Centre for Civilization Diseases, University of Leipzig, Leipzig, 04103, Germany
| | - Eric Hahnen
- Center for Familial Breast and Ovarian Cancer, Faculty of Medicine and University Hospital Cologne, University of Cologne, Cologne, 50937, Germany
- Center for Integrated Oncology (CIO), Faculty of Medicine and University Hospital Cologne, University of Cologne, Cologne, 50937, Germany
| | - Rita K Schmutzler
- Center for Familial Breast and Ovarian Cancer, Faculty of Medicine and University Hospital Cologne, University of Cologne, Cologne, 50937, Germany
- Center for Integrated Oncology (CIO), Faculty of Medicine and University Hospital Cologne, University of Cologne, Cologne, 50937, Germany
- Center for Molecular Medicine Cologne (CMMC), Faculty of Medicine and University Hospital Cologne, University of Cologne, Cologne, 50931, Germany
| | - Barbara Wappenschmidt
- Center for Familial Breast and Ovarian Cancer, Faculty of Medicine and University Hospital Cologne, University of Cologne, Cologne, 50937, Germany
- Center for Integrated Oncology (CIO), Faculty of Medicine and University Hospital Cologne, University of Cologne, Cologne, 50937, Germany
| | - Douglas F Easton
- Centre for Cancer Genetic Epidemiology, Department of Public Health and Primary Care, University of Cambridge, Cambridge, CB1 8RN, UK
- Centre for Cancer Genetic Epidemiology, Department of Oncology, University of Cambridge, Cambridge, CB1 8RN, UK
| | - Marc Tischkowitz
- Program in Cancer Genetics, Departments of Human Genetics and Oncology, McGill University, Montréal, QC, H4A 3J1, Canada
- Department of Medical Genetics, National Institute for Health Research Cambridge Biomedical Research Centre, University of Cambridge, Cambridge, CB2 0QQ, UK
| | - Christian F Singer
- Department of OB/GYN and Comprehensive Cancer Center, Medical University of Vienna, Vienna, 1090, Austria
| | - Yen Yen Tan
- Department of OB/GYN and Comprehensive Cancer Center, Medical University of Vienna, Vienna, 1090, Austria
| | - Alice S Whittemore
- Department of Epidemiology and Population Health, Stanford University School of Medicine, Stanford, CA, 94305, USA
- Department of Biomedical Data Science, Stanford University School of Medicine, Stanford, CA, 94305, USA
| | - Weiva Sieh
- Department of Population Health Science and Policy, Icahn School of Medicine at Mount Sinai, New York, NY, 10029, USA
- Department of Genetics and Genomic Sciences, Icahn School of Medicine at Mount Sinai, New York, NY, 10029, USA
| | - James D Brenton
- Cancer Research UK Cambridge Institute, University of Cambridge, Cambridge, CB2 0RE, UK
| | - Drakoulis Yannoukakos
- Molecular Diagnostics Laboratory, INRASTES, National Centre for Scientific Research 'Demokritos', Athens, 15310, Greece
| | - Florentia Fostira
- Molecular Diagnostics Laboratory, INRASTES, National Centre for Scientific Research 'Demokritos', Athens, 15310, Greece
| | - Irene Konstantopoulou
- Molecular Diagnostics Laboratory, INRASTES, National Centre for Scientific Research 'Demokritos', Athens, 15310, Greece
| | - Jana Soukupova
- Institute of Medical Biochemistry and Laboratory Diagnostics, First Faculty of Medicine, Charles University and General University Hospital in Prague, Prague, 12000, Czech Republic
| | - Michal Vocka
- Department of Oncology, First Faculty of Medicine, Charles University and General University Hospital in Prague, Prague, 12000, Czech Republic
| | - Georgia Chenevix-Trench
- Department of Genetics and Computational Biology, QIMR Berghofer Medical Research Institute, Brisbane, QLD, 4006, Australia
| | - Paul D P Pharoah
- Centre for Cancer Genetic Epidemiology, Department of Public Health and Primary Care, University of Cambridge, Cambridge, CB1 8RN, UK
- Centre for Cancer Genetic Epidemiology, Department of Oncology, University of Cambridge, Cambridge, CB1 8RN, UK
| | - Antonis C Antoniou
- Centre for Cancer Genetic Epidemiology, Department of Public Health and Primary Care, University of Cambridge, Cambridge, CB1 8RN, UK
| | - David E Goldgar
- Department of Dermatology, Huntsman Cancer Institute, University of Utah School of Medicine, Salt Lake City, UT, 84112, USA
| | - Amanda B Spurdle
- Population Health Program, QIMR Berghofer Medical Research Institute, Brisbane, QLD, 4006, Australia
| | - Kyriaki Michailidou
- Biostatistics Unit, The Cyprus Institute of Neurology and Genetics, Nicosia, 2371, Cyprus.
- Centre for Cancer Genetic Epidemiology, Department of Public Health and Primary Care, University of Cambridge, Cambridge, CB1 8RN, UK.
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Oda K, Aoki D, Tsuda H, Nishihara H, Aoyama H, Inomata H, Shimada M, Enomoto T. Japanese nationwide observational multicenter study of tumor BRCA1/2 variant testing in advanced ovarian cancer. Cancer Sci 2022; 114:271-280. [PMID: 36254756 PMCID: PMC9807512 DOI: 10.1111/cas.15518] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2022] [Revised: 07/13/2022] [Accepted: 07/26/2022] [Indexed: 01/07/2023] Open
Abstract
The association between germline BRCA1 and BRCA2 pathogenic variants (mutations: gBRCAm) and ovarian cancer risk is well established. Germline testing alone cannot detect somatic BRCA1/2 pathogenic variants (sBRCAm), which is calculated based on the proportion of tumor BRCAm (tBRCAm) from tumor samples and gBRCAm. Homologous recombination deficiency (HRD) results mainly from genetic/epigenetic alterations in homologous recombination repair-related genes and can be evaluated by genomic instability status. In Japan, the prevalence of tBRCAm, sBRCAm, and HRD remains unclear. This multicenter, cross-sectional, observational study, CHaRacterIzing the croSs-secTional approach to invEstigate the prevaLence of tissue BRCA1/2 mutations in newLy diagnosEd advanced ovarian cancer patients (CHRISTELLE), evaluated the prevalence of tBRCAm, sBRCAm, and HRD in tumor specimens from newly diagnosed patients with ovarian cancer who underwent gBRCA testing. Of the 205 patients analyzed, 26.8% had a tBRCAm, including tBRCA1m (17.6%) and tBRCA2m (9.3%). The overall prevalence of tBRCAm, gBRCAm, sBRCAm, and HRD-positive status was 26.8%, 21.5%, 6.3%, and 60.0%, respectively. The calculated sBRCAm/tBRCAm ratio was 23.6% (13/55), and the prevalence of gBRCA variant of uncertain significance was 3.9%. These results suggest gBRCA testing alone cannot clearly identify the best course of treatment, highlighting the importance of sBRCA testing in Japan. The present results also suggest that testing for tBRCA and HRD should be encouraged in advanced ovarian cancer patients to drive precision medicine.
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Affiliation(s)
- Katsutoshi Oda
- Division of Integrative Genomics, Graduate School of MedicineThe University of TokyoTokyoJapan
| | - Daisuke Aoki
- Department of Obstetrics and GynecologyKeio University School of MedicineTokyoJapan
| | - Hitoshi Tsuda
- Department of Basic PathologyNational Defense Medical CollegeSaitamaJapan
| | | | | | | | - Muneaki Shimada
- Department of Obstetrics and GynecologyTohoku University Graduate School of MedicineMiyagiJapan
| | - Takayuki Enomoto
- Department of Obstetrics and GynecologyNiigata University Medical SchoolNiigataJapan
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Heemskerk-Gerritsen BAM, Hollestelle A, van Asperen CJ, van den Beek I, van Driel WJ, van Engelen K, Gómez Garcia EB, de Hullu JA, Koudijs MJ, Mourits MJE, Hooning MJ, Boere IA. Progression-free survival and overall survival after BRCA1/2-associated epithelial ovarian cancer: A matched cohort study. PLoS One 2022; 17:e0275015. [PMID: 36137114 PMCID: PMC9498928 DOI: 10.1371/journal.pone.0275015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2022] [Accepted: 09/08/2022] [Indexed: 11/19/2022] Open
Abstract
Introduction
Germline BRCA1/2-associated epithelial ovarian cancer has been associated with better progression-free survival and overall survival than sporadic epithelial ovarian cancer, but conclusive data are lacking.
Methods
We matched 389 BRCA1-associated and 123 BRCA2-associated epithelial ovarian cancer patients 1:1 to sporadic epithelial ovarian cancer patients on year of birth, year of diagnosis, and FIGO stage (< = IIA/> = IIB). Germline DNA test was performed before or after epithelial ovarian cancer diagnosis. All patients received chemotherapy. We used Cox proportional hazards models to estimate the associations between mutation status (BRCA1 or BRCA2 versus sporadic) and progression-free survival and overall survival. To investigate whether DNA testing after epithelial ovarian cancer diagnosis resulted in survival bias, we performed additional analyses limited to BRCA1/2-associated epithelial ovarian cancer patients with a DNA test result before cancer diagnosis (n = 73 BRCA1; n = 9 BRCA2) and their matched sporadic controls.
Results
The median follow-up was 4.4 years (range 0.1–30.1). During the first three years after epithelial ovarian cancer diagnosis, progression-free survival was better for BRCA1 (HR 0.88, 95% CI 0.74–1.04) and BRCA2 (HR 0.58, 95% CI 0.41–0.81) patients than for sporadic patients. Overall survival was better during the first six years after epithelial ovarian cancer for BRCA1 (HR 0.7, 95% CI 0.58–0.84) and BRCA2 (HR 0.41, 95% CI 0.29–0.59) patients. After surviving these years, survival benefits disappeared or were in favor of the sporadic patients.
Conclusion
For epithelial ovarian cancer patients who received chemotherapy, we confirmed survival benefit for BRCA1 and BRCA2 germline pathogenic variant carriers. This may indicate higher sensitivity to chemotherapy, both in first line treatment and in the recurrent setting. The observed benefit appears to be limited to a relatively short period after epithelial ovarian cancer diagnosis.
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Affiliation(s)
| | | | - Christi J. van Asperen
- Department of Clinical Genetics, Leiden University Medical Center, Leiden, the Netherlands
| | - Irma van den Beek
- Department of Human Genetics, Amsterdam University Medical Center (University of Amsterdam), Amsterdam, the Netherlands
| | | | - Klaartje van Engelen
- Department of Clinical Genetics, Amsterdam University Medical Center (VUmc), Amsterdam, the Netherlands
| | - Encarna B. Gómez Garcia
- Department of Clinical Genetics, Maastricht University Medical Center, Maastricht, the Netherlands
| | - Joanne A. de Hullu
- Department of Obstetrics & Gynecology, Radboud University Medical Center, Nijmegen, the Netherlands
| | - Marco J. Koudijs
- Department of Biomedical Genetics, Utrecht University Medical Center, Utrecht, the Netherlands
| | - Marian J. E. Mourits
- Department of Gynecologic Oncology, University Medical Center Groningen, Groningen, the Netherlands
| | - Maartje J. Hooning
- Department of Medical Oncology, Erasmus MC Cancer Institute, Rotterdam, the Netherlands
| | - Ingrid A. Boere
- Department of Medical Oncology, Erasmus MC Cancer Institute, Rotterdam, the Netherlands
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Paik ES, Heo EJ, Choi CH, Kim JH, Kim JW, Kim YM, Park SY, Lee JW, Kim JW, Kim BG. Prevalence and clinical characterization of BRCA1 and BRCA2 mutations in Korean patients with epithelial ovarian cancer. Cancer Sci 2021; 112:5055-5067. [PMID: 34657357 PMCID: PMC8645710 DOI: 10.1111/cas.15166] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2021] [Revised: 10/11/2021] [Accepted: 10/12/2021] [Indexed: 12/24/2022] Open
Abstract
This study was performed to investigate the prevalence, clinical characteristics, and treatment response according to BRCA1 and BRCA2 (BRCA) mutations in Korean patients with epithelial ovarian cancer (EOC). Two‐hundred and ninety‐eight Korean women diagnosed with high‐grade serous and/or endometrioid EOC from 2010 to 2015 were tested for germline and 86 specimens for somatic BRCA mutations, regardless of the family history. Clinical characteristics including survival outcomes were compared in patients with and without BRCA mutations (NCT02963688). A total of 43 different germline BRCA mutations were identified in 78 patients among 298 patients (26.2%). Somatic BRCA mutations were identified in 11 (12.8%) patients among patients without germline BRCA mutations. Haplotype analysis demonstrated no founder mutations in our Korean patient cohort. Insignificant differences in age at diagnosis, primary site, and residual disease after surgery were observed between patients with and without BRCA mutations. In multivariate analysis for overall survival (OS), the presence of BRCA mutation was significantly associated with OS (P = .049) in addition to platinum sensitivity (P < .001), indicating it is an independent prognostic factor for survival regardless of platinum sensitivity to first‐line chemotherapy. In addition, a higher response rate to subsequent chemotherapy after recurrence was observed in EOC patients with BRCA mutations resulting in better OS. In the current study, the prevalence of BRCA mutations in Korean patients with EOC was higher than previously reported in other ethnic groups. We demonstrated characteristics and treatment response in Korean EOC patients with BRCA mutations. These findings may provide valuable information to be considered in future clinical trials including Asian patients.
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Affiliation(s)
- E Sun Paik
- Department of Obstetrics and Gynecology, Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - Eun Jin Heo
- Department of Obstetrics and Gynecology, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - Chel Hun Choi
- Department of Obstetrics and Gynecology, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - Jae-Hoon Kim
- Department of Obstetrics and Gynecology, Gangnam Severance Hospital, Yonsei University School of Medicine, Seoul, Korea
| | - Jae-Weon Kim
- Department of Obstetrics and Gynecology, Seoul National University Hospital, Seoul National University School of Medicine, Seoul, Korea
| | - Yong-Man Kim
- Department of Obstetrics and Gynecology, Asan Medical Center, Ulsan University School of Medicine, Seoul, Korea
| | - Sang-Yoon Park
- Center for Uterine Cancer, Research Institute and Hospital, National Cancer Center, Goyang, Korea
| | - Jeong-Won Lee
- Department of Obstetrics and Gynecology, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - Jong-Won Kim
- Department of Clinical Laboratory Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - Byoung-Gie Kim
- Department of Obstetrics and Gynecology, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
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Sekine M, Nishino K, Enomoto T. Differences in Ovarian and Other Cancers Risks by Population and BRCA Mutation Location. Genes (Basel) 2021; 12:genes12071050. [PMID: 34356066 PMCID: PMC8303997 DOI: 10.3390/genes12071050] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2021] [Revised: 07/02/2021] [Accepted: 07/06/2021] [Indexed: 12/24/2022] Open
Abstract
Hereditary breast and ovarian cancer is caused by a germline mutation in BRCA1 or BRCA2 genes. The frequency of germline BRCA1/2 gene mutation carriers and the ratio of germline BRCA1 to BRCA2 mutations in BRCA-related cancer patients vary depending on the population. Genotype and phenotype correlations have been reported in BRCA mutant families, however, the correlations are rarely used for individual risk assessment and management. BRCA genetic testing has become a companion diagnostic for PARP inhibitors, and the number of families with germline BRCA mutation identified is growing rapidly. Therefore, it is expected that analysis of the risk of developing cancer will be possible in a large number of BRCA mutant carriers, and there is a possibility that personal and precision medicine for the carriers with specific common founder mutations will be realized. In this review, we investigated the association of ovarian cancer risk and BRCA mutation location, and differences of other BRCA-related cancer risks by BRCA1/2 mutation, and furthermore, we discussed the difference in the prevalence of germline BRCA mutation in ovarian cancer patients. As a result, although there are various discussions, there appear to be differences in ovarian cancer risk by population and BRCA mutation location. If it becomes possible to estimate the risk of developing BRCA-related cancer for each BRCA mutation type, the age at risk-reducing salpingo-oophorectomy can be determined individually. The decision would bring great benefits to young women with germline BRCA mutations.
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Affiliation(s)
- Masayuki Sekine
- Correspondence: ; Tel.: +81-25-227-2320; Fax: +81-25-227-0789
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BRCA Genetic Test and Risk-Reducing Salpingo-Oophorectomy for Hereditary Breast and Ovarian Cancer: State-of-the-Art. Cancers (Basel) 2021; 13:cancers13112562. [PMID: 34071148 PMCID: PMC8197088 DOI: 10.3390/cancers13112562] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2021] [Revised: 05/04/2021] [Accepted: 05/11/2021] [Indexed: 12/11/2022] Open
Abstract
In the field of gynecology, the approval of the PARP inhibitors (PARPi) has been changing the treatment of ovarian cancer patients. The BRCA genetic test and the HRD test are being used as a companion diagnosis before starting PARPi treatment. BRACAnalysis CDx® and Myriad myChoice® HRD test are widely used as a BRCA genetic test and HRD test, respectively. In addition, FoundationOne®CDx is sometimes used as a tumor BRCA test and HRD test. In clinical practice, gynecologists treating ovarian cancer are faced with making decisions such as whether to recommend the gBRCA test to all ovarian cancer patients, whether to perform the gBRCA test first or HRD test first, and so on. Regarding the judgment result of the HRD test, the cutoff value differs depending on the clinical trial, and the prevalence of gBRCA pathogenic variant rate is different in each histological type and country. A prospective cohort study showed that RRSO reduced all-cause mortality in both pre- and postmenopausal women; however, RRSO significantly reduced the risk of breast cancer for BRCA2 pathogenic variant carriers, but not for BRCA1 pathogenic variant carriers. Moreover, salpingectomy alone is said to not decrease the risk of developing ovarian or breast cancer, so further discussion is evidently required. We discuss the current situation and problems in doing BRCA genetic test and RRSO in this review article.
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Toss A, Piombino C, Tenedini E, Bologna A, Gasparini E, Tarantino V, Filieri ME, Cottafavi L, Giovanardi F, Madrigali S, Civallero M, Marcheselli L, Marchi I, Domati F, Venturelli M, Barbieri E, Grandi G, Tagliafico E, Cortesi L. The Prognostic and Predictive Role of Somatic BRCA Mutations in Ovarian Cancer: Results from a Multicenter Cohort Study. Diagnostics (Basel) 2021; 11:565. [PMID: 33801055 PMCID: PMC8003908 DOI: 10.3390/diagnostics11030565] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2021] [Revised: 03/16/2021] [Accepted: 03/18/2021] [Indexed: 12/17/2022] Open
Abstract
Previous research involving epithelial ovarian cancer patients showed that, compared to germline BRCA (gBRCA) mutations, somatic BRCA (sBRCA) mutations present a similar positive impact with regard to overall survival (OS) and platinum and PARP (poly (ADP-ribose) polymerase) inhibitor sensitivity. Nevertheless, molecular testing in these studies did not include copy number variation (CNV) analyses of BRCA genes. The aim of this study was to explore the prognostic and predictive role of sBRCA mutations as compared to gBRCA mutations in patients who were also tested for CNVs. Among the 158 patients included in the study, 17.09% of patients carried a pathogenic or likely pathogenic gBRCA variant and 15.19% of patients presented pathogenetic or likely pathogenic sBRCA variants and/or CNVs. Overall, 81.6% of the patients included in this study were diagnosed with a serous histotype, and 77.2% were in advanced stages. Among women diagnosed in advanced stages, gBRCA patients showed better progression-free survival and OS as compared to sBRCA and wild-type patients, whereas sBRCA patients did not show any advantage in outcome as compared to wild-type patients. In this study, the introduction of CNV analyses increased the detection rate of sBRCA mutations, and the resulting classification among gBRCA, sBRCA and wild-type patients was able to properly stratify the prognosis of OC patients. Particularly, sBRCA mutation patients failed to show any outcome advantage as compared to wild-type patients.
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Affiliation(s)
- Angela Toss
- Department of Oncology and Hematology, Azienda Ospedaliero Universitaria di Modena, 41124 Modena, Italy; (A.T.); (C.P.); (I.M.); (F.D.); (M.V.); (E.B.)
- Department of Surgery, Medicine, Dentistry and Morphological Sciences with Transplant Surgery, Oncology and Regenerative Medicine Relevance, University of Modena and Reggio Emilia, 41124 Modena, Italy;
| | - Claudia Piombino
- Department of Oncology and Hematology, Azienda Ospedaliero Universitaria di Modena, 41124 Modena, Italy; (A.T.); (C.P.); (I.M.); (F.D.); (M.V.); (E.B.)
| | - Elena Tenedini
- Department of Medical and Surgical Sciences, University of Modena and Reggio Emilia, 41124 Modena, Italy; (E.T.); (E.T.)
| | - Alessandra Bologna
- Department of Oncology, Arcispedale S. Maria Nuova IRCCS, 42123 Reggio Emilia, Italy; (A.B.); (E.G.)
| | - Elisa Gasparini
- Department of Oncology, Arcispedale S. Maria Nuova IRCCS, 42123 Reggio Emilia, Italy; (A.B.); (E.G.)
| | - Vittoria Tarantino
- PhD Program in Clinical and Experimental Medicine, University of Modena and Reggio Emilia, 41124 Modena, Italy;
| | | | - Luca Cottafavi
- Oncology Unit, Azienda Unità Sanitaria Locale di Modena, Ramazzini Hospital, 41012 Carpi, Italy;
| | - Filippo Giovanardi
- Medical Oncology Unit, Azienda Unità Sanitaria Locale, IRCCS di Reggio Emilia, 42122 Reggio Emilia, Italy; (F.G.); (S.M.)
| | - Stefano Madrigali
- Medical Oncology Unit, Azienda Unità Sanitaria Locale, IRCCS di Reggio Emilia, 42122 Reggio Emilia, Italy; (F.G.); (S.M.)
| | - Monica Civallero
- Department of Surgery, Medicine, Dentistry and Morphological Sciences with Transplant Surgery, Oncology and Regenerative Medicine Relevance, University of Modena and Reggio Emilia, 41124 Modena, Italy;
| | - Luigi Marcheselli
- Fondazione Italiana Linfomi (FIL), Department of Oncology and Hematology, Azienda Ospedaliero Universitaria di Modena, 41124 Modena, Italy;
| | - Isabella Marchi
- Department of Oncology and Hematology, Azienda Ospedaliero Universitaria di Modena, 41124 Modena, Italy; (A.T.); (C.P.); (I.M.); (F.D.); (M.V.); (E.B.)
| | - Federica Domati
- Department of Oncology and Hematology, Azienda Ospedaliero Universitaria di Modena, 41124 Modena, Italy; (A.T.); (C.P.); (I.M.); (F.D.); (M.V.); (E.B.)
| | - Marta Venturelli
- Department of Oncology and Hematology, Azienda Ospedaliero Universitaria di Modena, 41124 Modena, Italy; (A.T.); (C.P.); (I.M.); (F.D.); (M.V.); (E.B.)
| | - Elena Barbieri
- Department of Oncology and Hematology, Azienda Ospedaliero Universitaria di Modena, 41124 Modena, Italy; (A.T.); (C.P.); (I.M.); (F.D.); (M.V.); (E.B.)
| | - Giovanni Grandi
- Department of Obstetrics, Gynecology and Pediatrics, Obstetrics and Gynecology Unit, Azienda Ospedaliero Universitaria di Modena, 41124 Modena, Italy;
| | - Enrico Tagliafico
- Department of Medical and Surgical Sciences, University of Modena and Reggio Emilia, 41124 Modena, Italy; (E.T.); (E.T.)
- Department of Laboratory Medicine and Pathology, Diagnostic Hematology and Clinical Genomics Unit, Azienda Ospedaliero Universitaria di Modena, 41124 Modena, Italy
- Center for Genome Research University of Modena and Reggio Emilia, 41124 Modena, Italy
| | - Laura Cortesi
- Department of Oncology and Hematology, Azienda Ospedaliero Universitaria di Modena, 41124 Modena, Italy; (A.T.); (C.P.); (I.M.); (F.D.); (M.V.); (E.B.)
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Ashour M, Ezzat Shafik H. Frequency of germline mutations in BRCA1 and BRCA2 in ovarian cancer patients and their effect on treatment outcome. Cancer Manag Res 2019; 11:6275-6284. [PMID: 31372034 PMCID: PMC6626894 DOI: 10.2147/cmar.s206817] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2019] [Accepted: 05/17/2019] [Indexed: 12/14/2022] Open
Abstract
Aim of work Reporting the incidence and the variants of BRCA1/2 mutations in ovarian cancer patients exploring their effects on the treatment outcomes. Patients and methods In total, 104 patients with epithelial ovarian cancer were prospectively recruited to the study. Analysis consisted of the sequencing of all the translated exons and immediately adjacent intronic regions of the BRCA1/2 genes. Responses to multiple lines of chemotherapy were assessed, as well as the effect of BRCA gene mutations on progression-free survival (PFS) and overall survival (OS). Results Pathogenic BRCA1/2 mutations were found in 21.15% of the patients. BRCA1 mutations represented 68.2% of the total mutations. Two novel BRCA1 mutations were identified. Age at diagnosis was a strong predictor of the presence of a pathogenic BRCA1/2 mutation. Patients with a family history of cancer had a higher incidence of BRCA mutations (P=0.005). As high as 72% of the patients with BRCA mutations were diagnosed at advanced stage. High-grade serous tumors have a higher incidence of pathogenic mutation (P=0.07). Response to neoadjuvant chemotherapy was high (93.9%). All patients underwent surgery which was optimal in 73.1% of the patients. As high as 85.6% of the patients received adjuvant chemotherapy. Relapse rate was 45.2%. Visceral metastasis was more often in BRCA carriers (P=0.01). Patients carrying pathogenic BRCA1/2 mutations had a longer median PFS of 42.43 months (95% CI 32.04–52.83) compared to 22.24 months (95% CI 14.83–29.58) for non-carriers (P=0.08). OS was 64.32 months (95% CI 38.09–90.06) for BRCA mutation patients versus 56.63 months (95% CI 50.05–63.21) (P=0.04) for non-carriers. In multivariate analysis, early stage at diagnosis and optimal debulking were the only independent predictors of better PFS and OS. Conclusion We documented a number of pathogenic BRCA1 and 2 mutations in this patients cohort; two novel mutations were detected. BRCA status seemed to affect survival in ovarian cancer patients.
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Affiliation(s)
- Mohamed Ashour
- Clinical Oncology, Faculty of Medicine, Al Azhar University, Kuwait, Egypt.,Department of Medical Oncology, Kuwait Cancer Control Centre, Farwanyia, Ragai, Kuwait, Egypt
| | - Hanan Ezzat Shafik
- Medical Oncology Department, National Cancer Institute, Cairo University, Giza, Cairo, Egypt
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Siraj AK, Bu R, Iqbal K, Siraj N, Al-Haqawi W, Al-Badawi IA, Parvathareddy SK, Masoodi T, Tulbah A, Al-Dayel F, Al-Kuraya KS. Prevalence, spectrum, and founder effect of BRCA1 and BRCA2 mutations in epithelial ovarian cancer from the Middle East. Hum Mutat 2019; 40:729-733. [PMID: 30825404 DOI: 10.1002/humu.23736] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2018] [Revised: 02/21/2019] [Accepted: 02/28/2019] [Indexed: 12/16/2022]
Abstract
Germline mutations in breast cancer susceptibility gene 1 and 2 have previously been estimated to contribute to 13-18% of all epithelial ovarian cancer (EOC). To characterize the prevalence and effect of BRCA1 and BRCA2 mutations in Middle Eastern EOC patients, BRCA mutation screening was performed in 407 unselected ovarian cancer patients using targeted capture and/or Sanger sequencing. A total of 19 different pathogenic variants (PVs) were identified in 50 (12.3%) women. Nine PVs were recurrent accounting for 80% of cases with PVs (40/50) in the entire cohort. Founder mutation analysis revealed only two mutations (c.4136_4137delCT and c.1140dupG) sharing the same haplotypes thus representing founder mutations in the Middle Eastern population. Identification of the mutation spectrum, prevalence, and founder effect in Middle Eastern population facilitates genetic counseling, risk assessment, and development of a cost-effective screening strategy.
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Affiliation(s)
- Abdul K Siraj
- Human Cancer Genomic Research, Research Center, King Faisal Specialist Hospital and Research Center, Riyadh, Saudi Arabia
| | - Rong Bu
- Human Cancer Genomic Research, Research Center, King Faisal Specialist Hospital and Research Center, Riyadh, Saudi Arabia
| | - Kaleem Iqbal
- Human Cancer Genomic Research, Research Center, King Faisal Specialist Hospital and Research Center, Riyadh, Saudi Arabia
| | - Nabil Siraj
- Human Cancer Genomic Research, Research Center, King Faisal Specialist Hospital and Research Center, Riyadh, Saudi Arabia
| | - Wael Al-Haqawi
- Human Cancer Genomic Research, Research Center, King Faisal Specialist Hospital and Research Center, Riyadh, Saudi Arabia
| | - Ismail A Al-Badawi
- Department of Obstetrics and Gynecology, King Faisal Specialist Hospital and Research Center, Riyadh, Saudi Arabia
| | - Sandeep Kumar Parvathareddy
- Human Cancer Genomic Research, Research Center, King Faisal Specialist Hospital and Research Center, Riyadh, Saudi Arabia
| | - Tariq Masoodi
- Human Cancer Genomic Research, Research Center, King Faisal Specialist Hospital and Research Center, Riyadh, Saudi Arabia
| | - Asma Tulbah
- Department of Pathology and Laboratory Medicine, King Faisal Specialist Hospital and Research Center, Riyadh, Saudi Arabia
| | - Fouad Al-Dayel
- Department of Pathology, King Faisal Specialist Hospital and Research Center, Riyadh, Saudi Arabia
| | - Khawla S Al-Kuraya
- Human Cancer Genomic Research, Research Center, King Faisal Specialist Hospital and Research Center, Riyadh, Saudi Arabia
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Abstract
Hereditary breast and ovarian cancer is an inherited syndrome associated with BRCA1/2 germline defects. The identified mutations are classified as missense, large deletion, insertion, nonsense and splice-site variants with a deleterious impact on BRCA1/2 function. Part of these forms the well-documented truncating mutations, and missense variants represent a clinical dilemma as the pathogenic role is yet to be clearly shown. In this systematic review, we collected these missense variations with a documented deleterious function. We focused on English language articles from MEDLINE. This study included all BRCA1/2 germline missense mutations identified in breast and ovarian cancer patients. The method of this study followed the 'PRISMA statement for reporting systematic reviews and meta-analyses'. A total of 61 BRCA1/2 germline and pathogenic missense mutations were identified: 70.5% affected BRCA1 and 29.5% BRCA2, respectively. In BRCA1, the majority of mutations were located in the BRCA C-terminus (48.8%), leading to a disruption of function. Conversely, no specific associations were verified between mutations and the BRCA2 gene. The European population was the most affected by BRCA1 and the Asian population by BRCA2 mutant patterns. The identification of novel BRCA1/2 missense mutations requires specific genetic tests to assess pathogenicity. With this systematic review, we are, to the best of our knowledge, the first to collect the overall amount of data on these pathogenic mutants with the aim of improving the management of carriers and their kindred.
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11
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Krivokuca A, Boljevic I, Jovandic S, Magic Z, Mandic A, Tomasevic Z, Brankovic-Magic M. Germline mutations in cancer susceptibility genes in high grade serous ovarian cancer in Serbia. J Hum Genet 2019; 64:281-290. [DOI: 10.1038/s10038-019-0562-z] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2018] [Revised: 12/05/2018] [Accepted: 01/03/2019] [Indexed: 12/12/2022]
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12
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Rust K, Spiliopoulou P, Tang CY, Bell C, Stirling D, Phang T, Davidson R, Mackean M, Nussey F, Glasspool RM, Reed NS, Sadozye A, Porteous M, McGoldrick T, Ferguson M, Miedzybrodzka Z, McNeish IA, Gourley C. Routine germline BRCA1 and BRCA2 testing in patients with ovarian carcinoma: analysis of the Scottish real-life experience. BJOG 2018; 125:1451-1458. [PMID: 29460478 DOI: 10.1111/1471-0528.15171] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/26/2018] [Indexed: 11/29/2022]
Abstract
OBJECTIVE To determine the rates of germline BRCA1 and BRCA2 mutations in Scottish patients with ovarian cancer, before and after a change in testing policy. DESIGN Retrospective cohort study. SETTING Four cancer/genetics centres in Scotland. POPULATION Patients with ovarian cancer undergoing germline BRCA1 and BRCA2 (gBRCA1/2) sequencing before 2013 (under the 'old criteria', with selection based solely on family history), after 2013 (under the 'new criteria', with sequencing offered to newly presenting patients with non-mucinous ovarian cancer), and in the 'prevalent population' (who presented before 2013, but were not eligible for sequencing under the old criteria but were sequenced under the new criteria). METHODS Clinicopathological and sequence data were collected before and for 18 months after this change in selection criteria. MAIN OUTCOME MEASURES Frequency of germline BRCA1, BRCA2, RAD51C, and RAD51D mutations. RESULTS Of 599 patients sequenced, 205, 236, and 158 were in the 'old criteria', 'new criteria', and 'prevalent' populations, respectively. The frequency of gBRCA1/2 mutations was 30.7, 13.1, and 12.7%, respectively. The annual rate of gBRCA1/2 mutation detection was 4.2 before and 20.7 after the policy change. A total of 48% (15/31) 'new criteria' patients with gBRCA1/2 mutations had a Manchester score of <15 and would not have been offered sequencing based on family history criteria. In addition, 20 patients with gBRCA1/2 were identified in the prevalent population. The prevalence of gBRCA1/2 mutations in patients aged >70 years was 8.2%. CONCLUSIONS Sequencing all patients with non-mucinous ovarian cancer gives a much higher annual gBRCA1/2 mutation detection rate, with the frequency of positive tests still exceeding the 10% threshold upon which many family history-based models operate. TWEETABLE ABSTRACT BRCA sequencing all non-mucinous cancer patients increases mutation detection five fold.
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Affiliation(s)
- K Rust
- Edinburgh Cancer Centre, Edinburgh, UK
| | | | - C Y Tang
- Department of Oncology, Ninewells Hospital, Dundee, UK
| | - C Bell
- Department of Medical Genetics, NHS Grampian, Aberdeen, UK
| | - D Stirling
- Department of Clinical Genetics, Western General Hospital, Edinburgh, UK
| | - Thf Phang
- School of Medicine, Medical Sciences and Nutrition, University of Aberdeen, Aberdeen, UK
| | - R Davidson
- Department of Genetics, Queen Elizabeth University Hospital, Glasgow, UK
| | - M Mackean
- Edinburgh Cancer Centre, Edinburgh, UK
| | - F Nussey
- Edinburgh Cancer Centre, Edinburgh, UK
| | | | - N S Reed
- Beatson West of Scotland Cancer Centre, Glasgow, UK
| | - A Sadozye
- Beatson West of Scotland Cancer Centre, Glasgow, UK
| | - M Porteous
- Department of Clinical Genetics, Western General Hospital, Edinburgh, UK
| | - T McGoldrick
- Department of Oncology, Aberdeen Royal Infirmary, Aberdeen, UK
| | - M Ferguson
- Department of Oncology, Ninewells Hospital, Dundee, UK
| | - Z Miedzybrodzka
- Department of Medical Genetics, NHS Grampian, Aberdeen, UK
- School of Medicine, Medical Sciences and Nutrition, University of Aberdeen, Aberdeen, UK
| | - I A McNeish
- Beatson West of Scotland Cancer Centre, Glasgow, UK
- Institute of Cancer Sciences, University of Glasgow, Glasgow, UK
| | - C Gourley
- Edinburgh Cancer Centre, Edinburgh, UK
- Nicola Murray Centre for Ovarian Cancer Research, University of Edinburgh Cancer Research UK Centre, MRC IGMM, Western General Hospital, Edinburgh, UK
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13
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Harter P, Hauke J, Heitz F, Reuss A, Kommoss S, Marmé F, Heimbach A, Prieske K, Richters L, Burges A, Neidhardt G, de Gregorio N, El-Balat A, Hilpert F, Meier W, Kimmig R, Kast K, Sehouli J, Baumann K, Jackisch C, Park-Simon TW, Hanker L, Kröber S, Pfisterer J, Gevensleben H, Schnelzer A, Dietrich D, Neunhöffer T, Krockenberger M, Brucker SY, Nürnberg P, Thiele H, Altmüller J, Lamla J, Elser G, du Bois A, Hahnen E, Schmutzler R. Prevalence of deleterious germline variants in risk genes including BRCA1/2 in consecutive ovarian cancer patients (AGO-TR-1). PLoS One 2017; 12:e0186043. [PMID: 29053726 PMCID: PMC5650145 DOI: 10.1371/journal.pone.0186043] [Citation(s) in RCA: 80] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2017] [Accepted: 09/22/2017] [Indexed: 12/18/2022] Open
Abstract
BACKGROUND Identification of families at risk for ovarian cancer offers the opportunity to consider prophylactic surgery thus reducing ovarian cancer mortality. So far, identification of potentially affected families in Germany was solely performed via family history and numbers of affected family members with breast or ovarian cancer. However, neither the prevalence of deleterious variants in BRCA1/2 in ovarian cancer in Germany nor the reliability of family history as trigger for genetic counselling has ever been evaluated. METHODS Prospective counseling and germline testing of consecutive patients with primary diagnosis or with platinum-sensitive relapse of an invasive epithelial ovarian cancer. Testing included 25 candidate and established risk genes. Among these 25 genes, 16 genes (ATM, BRCA1, BRCA2, CDH1, CHEK2, MLH1, MSH2, MSH6, NBN, PMS2, PTEN, PALB2, RAD51C, RAD51D, STK11, TP53) were defined as established cancer risk genes. A positive family history was defined as at least one relative with breast cancer or ovarian cancer or breast cancer in personal history. RESULTS In total, we analyzed 523 patients: 281 patients with primary diagnosis of ovarian cancer and 242 patients with relapsed disease. Median age at primary diagnosis was 58 years (range 16-93) and 406 patients (77.6%) had a high-grade serous ovarian cancer. In total, 27.9% of the patients showed at least one deleterious variant in all 25 investigated genes and 26.4% in the defined 16 risk genes. Deleterious variants were most prevalent in the BRCA1 (15.5%), BRCA2 (5.5%), RAD51C (2.5%) and PALB2 (1.1%) genes. The prevalence of deleterious variants did not differ significantly between patients at primary diagnosis and relapse. The prevalence of deleterious variants in BRCA1/2 (and in all 16 risk genes) in patients <60 years was 30.2% (33.2%) versus 10.6% (18.9%) in patients ≥60 years. Family history was positive in 43% of all patients. Patients with a positive family history had a prevalence of deleterious variants of 31.6% (36.0%) versus 11.4% (17.6%) and histologic subtype of high grade serous ovarian cancer versus other showed a prevalence of deleterious variants of 23.2% (29.1%) and 10.2% (14.8%), respectively. Testing only for BRCA1/2 would miss in our series more than 5% of the patients with a deleterious variant in established risk genes. CONCLUSIONS 26.4% of all patients harbor at least one deleterious variant in established risk genes. The threshold of 10% mutation rate which is accepted for reimbursement by health care providers in Germany was observed in all subgroups analyzed and neither age at primary diagnosis nor histo-type or family history sufficiently enough could identify a subgroup not eligible for genetic counselling and testing. Genetic testing should therefore be offered to every patient with invasive epithelial ovarian cancer and limiting testing to BRCA1/2 seems to be not sufficient.
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Affiliation(s)
- Philipp Harter
- Department of Gynecology & Gynecologic Oncology, Kliniken Essen-Mitte, Essen, Germany
| | - Jan Hauke
- Center for Hereditary Breast and Ovarian Cancer, University Hospital Cologne, Medical Faculty, Cologne, Germany
- Center for Integrated Oncology (CIO), University Hospital Cologne, Medical Faculty, Cologne, Germany
| | - Florian Heitz
- Department of Gynecology & Gynecologic Oncology, Kliniken Essen-Mitte, Essen, Germany
| | - Alexander Reuss
- Coordinating Center for Clinical Trials, Philipps-University of Marburg, Marburg, Germany
| | - Stefan Kommoss
- Department of Women’s Health, Tübingen University Hospital, Tübingen, Germany
| | - Frederik Marmé
- National Center for Tumor Disease/Department of Gynecology, University of Heidelberg, Heidelberg, Germany
| | - André Heimbach
- Institute of Human Genetics, University of Bonn, Bonn, Germany
| | - Katharina Prieske
- Department of Gynecology and Gynecologic Oncology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Lisa Richters
- Center for Hereditary Breast and Ovarian Cancer, University Hospital Cologne, Medical Faculty, Cologne, Germany
- Center for Integrated Oncology (CIO), University Hospital Cologne, Medical Faculty, Cologne, Germany
| | - Alexander Burges
- Department of Gynecology, University Hospital Munich-Großhadern. Munich, Germany
| | - Guido Neidhardt
- Center for Hereditary Breast and Ovarian Cancer, University Hospital Cologne, Medical Faculty, Cologne, Germany
- Center for Integrated Oncology (CIO), University Hospital Cologne, Medical Faculty, Cologne, Germany
| | | | - Ahmed El-Balat
- Department of Gynecology, University of Frankfurt, Frankfurt, Germany
| | - Felix Hilpert
- Onkologisches Therapiezentrum, Krankenhaus Jerusalem, Hamburg, Germany/ Department of Gynecology, University of Kiel, Kiel, Germany
- Department of Gynecology, University of Kiel, Kiel, Germany
| | - Werner Meier
- Department of Gynecology, Evangelisches Krankenhaus, Duesseldorf, Germany
| | - Rainer Kimmig
- Department of Gynecology, University of Essen, Essen, Germany
| | - Karin Kast
- Department of Gynecology and Obstetrics, Medical Faculty and University Hospital Carl Gustav Carus, Technische Universität Dresden, Dresden, Germany
- National Center for Tumor Diseases (NCT), Partner Site Dresden, Dresden, Germany
- German Cancer Consortium (DKTK), Dresden and German Cancer Research Center (DKFZ), Heidelberg, Germany
| | - Jalid Sehouli
- Department of Gynecology and Gynecological Oncology, Charité, Campus Virchow, Berlin, Germany
| | - Klaus Baumann
- Department of Gynecology and Obstetrics, Klinikum Ludwigshafen, Ludwigshafen, Germany
- Department of Gynecology, Gynecologic Endocrinology & Oncology, Philipps-University Marburg, Marburg, Germany
| | - Christian Jackisch
- Department of Gynecology and Obstetrics, Sana Klinikum, Offenbach, Germany
| | | | - Lars Hanker
- Department of Gynecology & Obstetrics, University Hospital Schleswig-Holstein, Campus Lübeck, Lübeck, Germany
| | - Sandra Kröber
- Center for Hereditary Breast and Ovarian Cancer, University Hospital Cologne, Medical Faculty, Cologne, Germany
- Center for Integrated Oncology (CIO), University Hospital Cologne, Medical Faculty, Cologne, Germany
| | | | | | - Andreas Schnelzer
- Department of Gynecology, Klinikum rechts der Isar, Technical University of Munich, Munich, Germany
| | - Dimo Dietrich
- University Hospital Bonn, Department of Otolaryngology, Head and Neck Surgery, Bonn, Germany
| | - Tanja Neunhöffer
- Department of Gynecology, Dr. Horst-Schmidt-Kliniken, Wiesbaden, Germany
| | | | - Sara Y. Brucker
- Department of Women’s Health, Tübingen University Hospital, Tübingen, Germany
| | - Peter Nürnberg
- Center for Molecular Medicine Cologne (CMMC), University of Cologne, Cologne, Germany
- Cologne Center for Genomics (CCG), University of Cologne, Cologne, Germany
- Cologne Excellence Cluster on Cellular Stress Responses in Aging-Associated Diseases (CECAD), University of Cologne, Cologne, Germany
| | - Holger Thiele
- Cologne Center for Genomics (CCG), University of Cologne, Cologne, Germany
| | - Janine Altmüller
- Center for Molecular Medicine Cologne (CMMC), University of Cologne, Cologne, Germany
- Cologne Center for Genomics (CCG), University of Cologne, Cologne, Germany
| | | | | | - Andreas du Bois
- Department of Gynecology & Gynecologic Oncology, Kliniken Essen-Mitte, Essen, Germany
| | - Eric Hahnen
- Center for Hereditary Breast and Ovarian Cancer, University Hospital Cologne, Medical Faculty, Cologne, Germany
- Center for Integrated Oncology (CIO), University Hospital Cologne, Medical Faculty, Cologne, Germany
| | - Rita Schmutzler
- Center for Hereditary Breast and Ovarian Cancer, University Hospital Cologne, Medical Faculty, Cologne, Germany
- Center for Integrated Oncology (CIO), University Hospital Cologne, Medical Faculty, Cologne, Germany
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14
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Capoluongo E, Ellison G, López-Guerrero JA, Penault-Llorca F, Ligtenberg MJL, Banerjee S, Singer C, Friedman E, Markiefka B, Schirmacher P, Büttner R, van Asperen CJ, Ray-Coquard I, Endris V, Kamel-Reid S, Percival N, Bryce J, Röthlisberger B, Soong R, de Castro DG. Guidance Statement On BRCA1/2 Tumor Testing in Ovarian Cancer Patients. Semin Oncol 2017; 44:187-197. [PMID: 29248130 DOI: 10.1053/j.seminoncol.2017.08.004] [Citation(s) in RCA: 65] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/02/2017] [Revised: 07/28/2017] [Accepted: 08/28/2017] [Indexed: 01/25/2023]
Abstract
The approval, in 2015, of the first poly (adenosine diphosphate-ribose) polymerase inhibitor (PARPi; olaparib, Lynparza) for platinum-sensitive relapsed high-grade ovarian cancer with either germline or somatic BRCA1/2 deleterious mutations is changing the way that BRCA1/2 testing services are offered to patients with ovarian cancer. Ovarian cancer patients are now being referred for BRCA1/2 genetic testing for treatment decisions, in addition to familial risk estimation, and irrespective of a family history of breast or ovarian cancer. Furthermore, testing of tumor samples to identify the estimated 3%-9% of patients with somatic BRCA1/2 mutations who, in addition to germline carriers, could benefit from PARPi therapy is also now being considered. This new testing paradigm poses some challenges, in particular the technical and analytical difficulties of analyzing chemically challenged DNA derived from formalin-fixed, paraffin-embedded specimens. The current manuscript reviews some of these challenges and technical recommendations to consider when undertaking BRCA1/2 testing in tumor tissue samples to detect both germline and somatic BRCA1/2 mutations. Also provided are considerations for incorporating genetic analysis of ovarian tumor samples into the patient pathway and ethical requirements.
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Affiliation(s)
- Ettore Capoluongo
- Catholic University of the Sacred Heart and A. Gemelli Teaching Hospital Foundation, Rome, Italy
| | | | | | | | | | | | | | | | | | | | | | - Christi J van Asperen
- Department of Clinical Genetics, Leiden University Medical Center, Leiden, The Netherlands
| | | | | | | | | | - Jane Bryce
- Nazionale Tumori IRCCS Pascale, Naples, Italy
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15
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Ellison G, Wallace A, Kohlmann A, Patton S. A comparative study of germline BRCA1 and BRCA2 mutation screening methods in use in 20 European clinical diagnostic laboratories. Br J Cancer 2017; 117:710-716. [PMID: 28751759 PMCID: PMC5572178 DOI: 10.1038/bjc.2017.223] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2017] [Revised: 05/24/2017] [Accepted: 06/21/2017] [Indexed: 12/20/2022] Open
Abstract
BACKGROUND Thousands of clinically relevant variations in BRCA1 and BRCA2 have been discovered and this poses a significant challenge with respect to the accurate detection, analysis turn-around time, characterisation and interpretation of these sequence variants. METHODS We evaluated the performance of different BRCA1/2 gene testing practices in routine diagnostic use in 20 European laboratories, with a focus on next-generation sequencing-based strategies as this is the technical approach implemented by or under adoption by most European clinical laboratories. Participant laboratories, selected on expertise and diagnostic service quality, tested 10 identical DNA samples containing a range of challenging pathogenic variants. RESULTS A small number of errors in the detection of pathogenic and significant variants were identified (2.6% diagnostic error rate). There was a high degree of concordance (>97%) across all laboratories for all variants detected. No systematic technical flaw was identified in the strategies employed across the participating laboratories. CONCLUSIONS The discrepancies identified are most likely due to human error or the way the methodology has been implemented locally, for example, next-generation sequencing bioinformatics pipelines, rather than technical limitations of the methods. The choice of BRCA1/2 testing method will therefore depend on multiple factors including required throughput and turn-around times, access to equipment, expertise and budget.
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Affiliation(s)
- Gillian Ellison
- AstraZeneca, Personalised Healthcare and Biomarkers, Alderley Park, Macclesfield SK10 4TG, UK
| | - Andrew Wallace
- Genomic Diagnostics Laboratory, Manchester Centre for Genomic Medicine, St Mary’s Hospital, Manchester M13 9WL, UK
| | - Alexander Kohlmann
- AstraZeneca, Personalised Healthcare and Biomarkers, Alderley Park, Macclesfield SK10 4TG, UK
| | - Simon Patton
- European Molecular Genetics Quality Network, Manchester Centre for Genomic Medicine, St Mary’s Hospital, Manchester M13 9WL, UK
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16
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Reid BM, Permuth JB, Sellers TA. Epidemiology of ovarian cancer: a review. Cancer Biol Med 2017. [PMID: 28443200 DOI: 10.20892/j.issn.2095-3941.2016.0084]+[] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
Ovarian cancer (OC) is the seventh most commonly diagnosed cancer among women in the world and the tenth most common in China. Epithelial OC is the most predominant pathologic subtype, with five major histotypes that differ in origination, pathogenesis, molecular alterations, risk factors, and prognosis. Genetic susceptibility is manifested by rare inherited mutations with high to moderate penetrance. Genome-wide association studies have additionally identified 29 common susceptibility alleles for OC, including 14 subtype-specific alleles. Several reproductive and hormonal factors may lower risk, including parity, oral contraceptive use, and lactation, while others such as older age at menopause and hormone replacement therapy confer increased risks. These associations differ by histotype, especially for mucinous OC, likely reflecting differences in etiology. Endometrioid and clear cell OC share a similar, unique pattern of associations with increased risks among women with endometriosis and decreased risks associated with tubal ligation. OC risks associated with other gynecological conditions and procedures, such as hysterectomy, pelvic inflammatory disease, and polycystic ovarian syndrome, are less clear. Other possible risk factors include environmental and lifestyle factors such as asbestos and talc powder exposures, and cigarette smoking. The epidemiology provides clues on etiology, primary prevention, early detection, and possibly even therapeutic strategies.
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Affiliation(s)
- Brett M Reid
- Department of Cancer Epidemiology, Division of Population Sciences, Moffitt Cancer Center, Tampa 33612, FL, USA
| | - Jennifer B Permuth
- Department of Cancer Epidemiology, Division of Population Sciences, Moffitt Cancer Center, Tampa 33612, FL, USA
| | - Thomas A Sellers
- Department of Cancer Epidemiology, Division of Population Sciences, Moffitt Cancer Center, Tampa 33612, FL, USA
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17
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Abstract
Ovarian cancer (OC) is the seventh most commonly diagnosed cancer among women in the world and the tenth most common in China. Epithelial OC is the most predominant pathologic subtype, with five major histotypes that differ in origination, pathogenesis, molecular alterations, risk factors, and prognosis. Genetic susceptibility is manifested by rare inherited mutations with high to moderate penetrance. Genome-wide association studies have additionally identified 29 common susceptibility alleles for OC, including 14 subtype-specific alleles. Several reproductive and hormonal factors may lower risk, including parity, oral contraceptive use, and lactation, while others such as older age at menopause and hormone replacement therapy confer increased risks. These associations differ by histotype, especially for mucinous OC, likely reflecting differences in etiology. Endometrioid and clear cell OC share a similar, unique pattern of associations with increased risks among women with endometriosis and decreased risks associated with tubal ligation. OC risks associated with other gynecological conditions and procedures, such as hysterectomy, pelvic inflammatory disease, and polycystic ovarian syndrome, are less clear. Other possible risk factors include environmental and lifestyle factors such as asbestos and talc powder exposures, and cigarette smoking. The epidemiology provides clues on etiology, primary prevention, early detection, and possibly even therapeutic strategies.
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Affiliation(s)
- Brett M Reid
- Department of Cancer Epidemiology, Division of Population Sciences, Moffitt Cancer Center, Tampa 33612, FL, USA
| | - Jennifer B Permuth
- Department of Cancer Epidemiology, Division of Population Sciences, Moffitt Cancer Center, Tampa 33612, FL, USA
| | - Thomas A Sellers
- Department of Cancer Epidemiology, Division of Population Sciences, Moffitt Cancer Center, Tampa 33612, FL, USA
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18
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Abstract
Ovarian cancer (OC) is the seventh most commonly diagnosed cancer among women in the world and the tenth most common in China. Epithelial OC is the most predominant pathologic subtype, with five major histotypes that differ in origination, pathogenesis, molecular alterations, risk factors, and prognosis. Genetic susceptibility is manifested by rare inherited mutations with high to moderate penetrance. Genome-wide association studies have additionally identified 29 common susceptibility alleles for OC, including 14 subtype-specific alleles. Several reproductive and hormonal factors may lower risk, including parity, oral contraceptive use, and lactation, while others such as older age at menopause and hormone replacement therapy confer increased risks. These associations differ by histotype, especially for mucinous OC, likely reflecting differences in etiology. Endometrioid and clear cell OC share a similar, unique pattern of associations with increased risks among women with endometriosis and decreased risks associated with tubal ligation. OC risks associated with other gynecological conditions and procedures, such as hysterectomy, pelvic inflammatory disease, and polycystic ovarian syndrome, are less clear. Other possible risk factors include environmental and lifestyle factors such as asbestos and talc powder exposures, and cigarette smoking. The epidemiology provides clues on etiology, primary prevention, early detection, and possibly even therapeutic strategies.
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Affiliation(s)
- Brett M Reid
- Department of Cancer Epidemiology, Division of Population Sciences, Moffitt Cancer Center, Tampa 33612, FL, USA
| | - Jennifer B Permuth
- Department of Cancer Epidemiology, Division of Population Sciences, Moffitt Cancer Center, Tampa 33612, FL, USA
| | - Thomas A Sellers
- Department of Cancer Epidemiology, Division of Population Sciences, Moffitt Cancer Center, Tampa 33612, FL, USA
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19
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Vergote I, Banerjee S, Gerdes AM, van Asperen C, Marth C, Vaz F, Ray-Coquard I, Stoppa-Lyonnet D, Gonzalez-Martin A, Sehouli J, Colombo N. Current perspectives on recommendations for BRCA genetic testing in ovarian cancer patients. Eur J Cancer 2016; 69:127-134. [PMID: 27821315 DOI: 10.1016/j.ejca.2016.10.006] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2016] [Accepted: 10/05/2016] [Indexed: 12/19/2022]
Abstract
Traditionally, BRCA genetic testing has been undertaken to identify patients and family members at future risk of developing cancer and patients have been referred for testing based on family history. However, the now recognised risk of ovarian cancer (OC) patients, even those with no known family history, harbouring a mutation in BRCA1/2, together with the first poly adenosine diphosphate ribose polymerase inhibitor (PARPi; olaparib [Lynparza]) being licenced for the treatment of BRCA-mutated OC, has led to reconsideration of referral criteria for OC patients. Provided here is a review of the existing data and guidelines in the European Union, relating to recommendations, as well as considerations, for the referral of OC patients for BRCA genetic testing. Based on this review of newly updated guidance and up-to-date evidence, the following is recommended: all patients with invasive epithelial OC (excluding borderline or mucinous), including those with fallopian tube and peritoneal cancers, should be considered as candidates for referral for BRCA genetic testing, irrespective of age; genetic testing should ideally be offered at diagnosis, although patients can be referred at any stage; retrospective testing should be offered to patients in long-term follow-up because of the implications for family members and individual future breast cancer risk; and germline BRCA testing of a blood/saliva sample should initially be conducted and, if negative, tumour tissue should be tested (to identify non-germline [somatic] BRCA PARPi therapy candidates).
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Affiliation(s)
- Ignace Vergote
- Leuven Cancer Institute, KU, Leuven, European Union, Belgium.
| | | | - Anne-Marie Gerdes
- Department of Clinical Genetics, Copenhagen University Hospital, Denmark
| | - Christi van Asperen
- Department of Clinical Genetics, Leiden University Medical Center, Netherlands
| | | | - Fatima Vaz
- Portuguese Institute of Oncology, Lisbon, Portugal
| | - Isabelle Ray-Coquard
- Department of Medical Oncology, CRLCC Léon Bérard, University Claude Bernard Lyon, France
| | - Dominique Stoppa-Lyonnet
- Institut Curie, Department of Tumour Biology, Paris, France; Charité University of Medicine Berlin, Germany; University of Milan-Bicocca, and European Institute of Oncology, Italy
| | | | - Jalid Sehouli
- Université Paris Descartes, Sorbonne Paris Cité, France
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20
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Stoppa-Lyonnet D. The biological effects and clinical implications of BRCA mutations: where do we go from here? Eur J Hum Genet 2016; 24 Suppl 1:S3-9. [PMID: 27514841 PMCID: PMC5141575 DOI: 10.1038/ejhg.2016.93] [Citation(s) in RCA: 63] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
BRCA1 and BRCA2 are tumour-suppressor genes encoding proteins that are essential for the repair of DNA double-strand breaks by homologous recombination (HR). Cells that lack either BRCA1 or BRCA2 repair these lesions by alternative, more error-prone mechanisms. Individuals carrying germline pathogenic mutations in BRCA1 or BRCA2 are at highly elevated risk of developing breast and/or ovarian cancer. Genetic testing for germline pathogenic mutations in BRCA1 and BRCA2 has proved to be a valuable tool for determining eligibility for cancer screening and prevention programmes. In view of increasing evidence that the HR DNA repair pathway can also be disrupted by sequence variants in other genes, screening for other BRCA-like defects has potential implications for patient care. Additionally, there is a growing argument for directly testing tumours for pathogenic mutations in BRCA1, BRCA2 and other genes involved in HR-DNA repair as inactivation of these genes may be strictly somatic. Tumours in which HR-DNA repair is altered are most likely to respond to emerging targeted therapies, such as inhibitors of poly-ADP ribose polymerase. This review highlights the biological role of pathogenic BRCA mutations and other associated defects in DNA damage repair mechanisms in breast and ovarian cancer, with particular focus on implications for patient management strategies.
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Affiliation(s)
- Dominique Stoppa-Lyonnet
- Department of Tumour Biology, Institut Curie, Paris, France
- INSERM U830, Institut Curie, Paris, France
- Department de Génétique, Université Paris Descartes, Service de Génétique, Institut Curie, Paris, France
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21
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Arts-de Jong M, de Bock GH, van Asperen CJ, Mourits MJE, de Hullu JA, Kets CM. Germline BRCA1/2 mutation testing is indicated in every patient with epithelial ovarian cancer: A systematic review. Eur J Cancer 2016; 61:137-45. [PMID: 27209246 DOI: 10.1016/j.ejca.2016.03.009] [Citation(s) in RCA: 50] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2015] [Revised: 02/26/2016] [Accepted: 03/07/2016] [Indexed: 12/27/2022]
Abstract
The presence of a germline BRCA1/2 mutation improves options for tailored risk-reducing strategies and treatment in both breast and ovarian cancer patients and their relatives. Currently, referral for germline BRCA1/2 mutation testing of women with epithelial ovarian cancer (EOC) varies widely, based on different criteria, such as age of onset, family history of breast and/or ovarian cancer and histological type of EOC. The overall probability of a germline BRCA1/2 mutation in women with EOC is above 10%, and a substantial part of the germline BRCA1/2 mutation carriers is missed when applying these criteria for referral. Therefore, we strongly recommend referral of all women with EOC for genetic counselling and DNA analysis.
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Affiliation(s)
- Marieke Arts-de Jong
- Department of Obstetrics and Gynaecology, Radboud University Medical Center, Nijmegen, the Netherlands.
| | - Geertruida H de Bock
- University of Groningen, University Medical Center Groningen, Department of Epidemiology, Groningen, the Netherlands
| | - Christi J van Asperen
- Department of Clinical Genetics, Leiden University Medical Center, Leiden, the Netherlands
| | - Marian J E Mourits
- University of Groningen, University Medical Center Groningen, Department of Obstetrics and Gynaecology, Groningen, the Netherlands
| | - Joanne A de Hullu
- Department of Obstetrics and Gynaecology, Radboud University Medical Center, Nijmegen, the Netherlands
| | - C Marleen Kets
- Department of Human Genetics, Radboud University Medical Center, Nijmegen, the Netherlands
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22
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Eccles DM, Balmaña J, Clune J, Ehlken B, Gohlke A, Hirst C, Potter D, Schroeder C, Tyczynski JE, Gomez Garcia EB. Selecting Patients with Ovarian Cancer for Germline BRCA Mutation Testing: Findings from Guidelines and a Systematic Literature Review. Adv Ther 2016; 33:129-50. [PMID: 26809252 DOI: 10.1007/s12325-016-0281-1] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2015] [Indexed: 12/31/2022]
Abstract
INTRODUCTION One of the most significant risk factors for the development of ovarian cancer (OC) is a genetic mutation in BRCA1 (breast cancer gene 1) or BRCA2. Here we describe the impact of previous and current guidance on BRCA testing practices and provide evidence about which characteristics best identify patients with OC and an underlying germline BRCA mutation. METHODS A search was conducted for guidelines recommending genetic testing to identify constitutional pathogenic mutations in the BRCA genes. In addition, a systematic literature search of studies published in 2003-2015 was performed to assess BRCA mutation frequency in population-based OC patients unselected for patient characteristics (personal history, family history, and Ashkenazi Jewish ethnicity) and to describe the association of patient characteristics with BRCA mutation. Exclusively, studies assessing epithelial OC or invasive epithelial OC with full-gene screening of both BRCA1 and BRCA2 mutations were evaluated. RESULTS Of 15 guidelines recommending genetic testing for OC patients, only 5 do not require co-occurrence of specific patient or family characteristics. Twenty-two full publications were identified that assessed germline BRCA mutation frequency in women with OC, utilizing a range of different full mutation detection methods. Germline BRCA mutation prevalence in patients with OC was 5.8-24.8%. Using criteria recommended in guidelines that are yet to be updated, we estimated that 27.5% of all germline BRCA mutations present in patients with OC may be missed because patients do not meet appropriate criteria. CONCLUSION With the availability of BRCA mutation-targeted therapies, identification of patients with OC with germline BRCA mutations has potential therapeutic consequences. For identified gene carriers, predictive testing to allow cancer prevention strategies, including bilateral salpingo-oophorectomy, provides wider benefit to identifying such gene carriers. Updating guidelines will increase the opportunity for targeted treatment among patients and risk reduction in relatives. FUNDING AstraZeneca.
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Affiliation(s)
- Diana M Eccles
- Somers Cancer Research Building MP 824, University Hospital Southampton, Southampton, UK.
| | - Judith Balmaña
- Medical Oncology Department, Vall d'Hebron Hospital and Vall d'Hebron Institute of Oncology, Universitat Autonoma de Barcelona, Barcelona, Spain
| | - Joe Clune
- AstraZeneca, Cambridge Science Park, Cambridge, UK
| | | | | | - Ceri Hirst
- AstraZeneca, Cambridge Science Park, Cambridge, UK
- F. Hoffmann-La Roche AG, Basel, Switzerland
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23
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Hasmad HN, Lai KN, Wen WX, Park DJ, Nguyen-Dumont T, Kang PCE, Thirthagiri E, Ma'som M, Lim BK, Southey M, Woo YL, Teo SH. Evaluation of germline BRCA1 and BRCA2 mutations in a multi-ethnic Asian cohort of ovarian cancer patients. Gynecol Oncol 2015; 141:318-322. [PMID: 26541979 DOI: 10.1016/j.ygyno.2015.11.001] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2015] [Revised: 10/29/2015] [Accepted: 11/02/2015] [Indexed: 01/28/2023]
Abstract
OBJECTIVE Despite the discovery of breast and ovarian cancer predisposition genes BRCA1 and BRCA2 more than two decades ago, almost all the available data relate to women of European ancestry, with only a handful of studies in Asian populations. In this study, we determined the frequency of germline alterations in BRCA1 and BRCA2 in ovarian cancer patients from a multi-ethnic cross-sectional cohort of Asian ovarian cancer patients from Malaysia. METHODS From October 2008 to February 2015, we established a hospital-based cohort of ovarian cancer patients and the germline status of all 218 women with invasive epithelial ovarian cancer was tested using targeted amplification and sequencing of the intron-exon junctions and exonic sequences of BRCA1, BRCA2, PALB2 and TP53. RESULTS BRCA1 and BRCA2 mutations were found in 8% (17 cases) and 3% (7 cases) of the ovarian cancer patients, respectively. Mutation carriers were diagnosed at a similar age to non-carriers, but were more likely to be Indian, have serous ovarian cancer, and have more relatives with breast or ovarian cancer. Nonetheless, 42% (10/24) of mutation carriers did not have any family history of breast or ovarian cancer and offering genetic counselling and genetic testing only to women with family history would mean that 35% (6/17) of BRCA1 mutation carriers and 57% (4/7) of BRCA2 mutation carriers would not be offered genetic testing. CONCLUSIONS Our data suggest that, similar to Caucasians, a significant proportion of Asian ovarian cancer was attributed to germline mutations in BRCA1 and to a lesser extent in BRCA2.
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Affiliation(s)
| | - Kah Nyin Lai
- Cancer Research Malaysia, Subang Jaya, Malaysia.
| | | | - Daniel Jonathan Park
- Genetic Epidemiology Laboratory, Department of Pathology, University of Melbourne, Melbourne, Australia.
| | - Tú Nguyen-Dumont
- Genetic Epidemiology Laboratory, Department of Pathology, University of Melbourne, Melbourne, Australia.
| | | | | | - Mahirah Ma'som
- Department of Obstetrics and Gynaecology, Faculty of Medicine, University Malaya, Kuala Lumpur, Malaysia.
| | - Boon Kiong Lim
- Department of Obstetrics and Gynaecology, Faculty of Medicine, University Malaya, Kuala Lumpur, Malaysia.
| | - Melissa Southey
- Genetic Epidemiology Laboratory, Department of Pathology, University of Melbourne, Melbourne, Australia.
| | - Yin Ling Woo
- Department of Obstetrics and Gynaecology, Faculty of Medicine, University Malaya, Kuala Lumpur, Malaysia.
| | - Soo-Hwang Teo
- Cancer Research Malaysia, Subang Jaya, Malaysia; Breast Cancer Research Unit, University Malaya Cancer Research Institute, Faculty of Medicine, University Malaya, Kuala Lumpur, Malaysia.
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24
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Sakamoto I, Hirotsu Y, Nakagomi H, Ouchi H, Ikegami A, Teramoto K, Amemiya K, Mochizuki H, Omata M. BRCA1 and BRCA2 mutations in Japanese patients with ovarian, fallopian tube, and primary peritoneal cancer. Cancer 2015; 122:84-90. [PMID: 26439132 DOI: 10.1002/cncr.29707] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2015] [Revised: 08/04/2015] [Accepted: 08/06/2015] [Indexed: 12/30/2022]
Abstract
BACKGROUND The contribution of BRCA1 and BRCA2 to ovarian cancer in Japanese patients is still unclear. This study investigated the frequency of germline mutations in BRCA1/2 in Japanese patients with ovarian, peritoneal, or fallopian tube cancer, regardless of their family histories, which were suggestive of hereditary breast and ovarian cancer. METHODS Ninety-five unselected women with ovarian cancer who were seen from 2013 to 2015 at Yamanashi Prefectural Central Hospital were enrolled. Analyses of BRCA1/2 gene mutations were performed with next-generation sequencing. RESULTS Twelve of the 95 patients (12.6%), including 5 in the BRCA1 (5.3%) and 7 in the BRCA2 (7.4%), had deleterious mutations. Among the 36 cases with a family history, 6 (16.7%) were found to carry mutations in BRCA1 and BRCA2. Notably, 6 of the 59 cases (10.2%) without a family history also had BRCA1/2 germline mutations. There was no statistical difference between the 2 groups (P = .36). The presence of mutations and their clinical relevance were studied. Mutation carriers were diagnosed at advanced stages (100% of positive cases among stage III or IV cases) and had poor prognostic histological subtypes (100% of positive cases had high-grade serous adenocarcinomas). CONCLUSIONS In this unselected Japanese population, approximately 13% of the cases with ovarian cancer appeared to be associated with an inherited risk, regardless of a family history. This finding indicates that BRCA1/2 genetic testing should be performed for all patients with ovarian cancers.
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Affiliation(s)
- Ikuko Sakamoto
- Department of Obstetrics and Gynecology, Yamanashi Prefectural Central Hospital, Kofu, Japan
| | - Yosuke Hirotsu
- Department of Genome Analysis Center, Yamanashi Prefectural Central Hospital, Kofu, Japan
| | - Hiroshi Nakagomi
- Department of Breast Surgery, Yamanashi Prefectural Central Hospital, Kofu, Japan
| | - Hidetaka Ouchi
- Department of Obstetrics and Gynecology, Yamanashi Prefectural Central Hospital, Kofu, Japan
| | - Atsushi Ikegami
- Department of Obstetrics and Gynecology, Yamanashi Prefectural Central Hospital, Kofu, Japan
| | - Katsuhiro Teramoto
- Department of Obstetrics and Gynecology, Yamanashi Prefectural Central Hospital, Kofu, Japan
| | - Kenji Amemiya
- Department of Genome Analysis Center, Yamanashi Prefectural Central Hospital, Kofu, Japan
| | - Hitoshi Mochizuki
- Department of Genome Analysis Center, Yamanashi Prefectural Central Hospital, Kofu, Japan
| | - Masao Omata
- Department of Genome Analysis Center, Yamanashi Prefectural Central Hospital, Kofu, Japan.,Graduate School of Medicine, University of Tokyo, Tokyo, Japan
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25
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RATAJSKA MAGDALENA, MATUSIAK MAGDALENA, KUZNIACKA ALINA, WASAG BARTOSZ, BROZEK IZABELA, BIERNAT WOJCIECH, KOCZKOWSKA MAGDALENA, DEBNIAK JAROSLAW, SNIADECKI MARCIN, KOZLOWSKI PIOTR, KLONOWSKA KATARZYNA, PILYUGIN MAXIM, WYDRA DARIUSZ, LAURENT GEOFF, LIMON JANUSZ, IRMINGER-FINGER IRMGARD. Cancer predisposing BARD1 mutations affect exon skipping and are associated with overexpression of specific BARD1 isoforms. Oncol Rep 2015; 34:2609-17. [DOI: 10.3892/or.2015.4235] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2015] [Accepted: 07/02/2015] [Indexed: 11/05/2022] Open
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Abstract
Ovarian cancer linked to Lynch syndrome represents a rare subset that typically presents at young age as early-stage tumors with an overrepresentation of endometrioid and clear cell histologies. We investigated the molecular profiles of Lynch syndrome-associated and sporadic ovarian cancer with the aim to identify key discriminators and central tumorigenic mechanisms in hereditary ovarian cancer. Global gene expression profiling using whole-genome c-DNA-mediated Annealing, Selection, extension, and Ligation was applied to 48 histopathologically matched Lynch syndrome-associated and sporadic ovarian cancers. Lynch syndrome-associated and sporadic ovarian cancers differed by 349 significantly deregulated genes, including PTPRH, BIRC3, SHH and TNFRSF6B. The genes involved were predominantly linked to cell growth, proliferation, and cell-to-cell signaling and interaction. When stratified for histologic subtype, hierarchical clustering confirmed distinct differences related to heredity in the endometrioid and serous subtypes. Furthermore, separate clustering was achieved in an independent, publically available data set. The distinct genetic signatures in Lynch syndrome-associated and sporadic ovarian cancers point to alternative preferred tumorigenic routes and suggest that genetic discriminators may be relevant for molecular diagnostics and targeted therapeutics.
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27
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Ellison G, Huang S, Carr H, Wallace A, Ahdesmaki M, Bhaskar S, Mills J. A reliable method for the detection of BRCA1 and BRCA2 mutations in fixed tumour tissue utilising multiplex PCR-based targeted next generation sequencing. BMC Clin Pathol 2015; 15:5. [PMID: 25859162 PMCID: PMC4391122 DOI: 10.1186/s12907-015-0004-6] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2014] [Accepted: 02/23/2015] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Germline mutations in BRCA1 or BRCA2 lead to a high lifetime probability of developing ovarian or breast cancer. These genes can also be involved in the development of non-hereditary tumours as somatic BRCA1/2 pathogenic variants are found in some of these cancers. Since patients with somatic BRCA pathogenic variants may benefit from treatment with poly ADP ribose polymerase inhibitors, it is important to be able to test for somatic changes in routinely available tumour samples. Such samples are typically formalin-fixed paraffin-embedded (FFPE) tissue, where the extracted DNA tends to be highly fragmented and of limited quantity, making analysis of large genes such as BRCA1 and BRCA2 challenging. This is made more difficult as somatic changes may be evident in only part of the sample, due to the presence of normal tissue. METHODS We examined the feasibility of analysing DNA extracted from FFPE ovarian and breast tumour tissue to identify significant DNA variants in BRCA1/ BRCA2 using next generation sequencing methods that were sensitive enough to detect low level mutations, multiplexed to reduce the amount of DNA required and had short amplicon design. The utility of two GeneRead DNAseq Targeted Exon Enrichment Panels with different designs targeting only BRCA1/2 exons, and the Ion AmpliSeq BRCA community panel, followed by library preparation and adaptor ligation using the TruSeq DNA PCR-Free HT Sample Preparation Kit and NGS analysis on the MiSeq were investigated. RESULTS Using the GeneRead method, we successfully analysed over 76% of samples, with >95% coverage of BRCA1/2 coding regions and a mean average read depth of >1000-fold. All mutations identified were confirmed where possible by Sanger sequencing or replication to eliminate the risk of false positive results due to artefacts within FFPE material. Admixture experiments demonstrated that BRCA1/2 variants could be detected if present in >10% of the sample. A sample subset was evaluated using the Ion AmpliSeq BRCA panel, achieving >99% coverage and sufficient read depth for a proportion of the samples. CONCLUSIONS Detection of BRCA1/2 variants in fixed tissue is feasible, and could be performed prospectively to facilitate optimum treatment decisions for ovarian or breast cancer patients.
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Affiliation(s)
- Gillian Ellison
- Personalised HealthCare and Biomarkers, Innovative Medicines and Early Development, AstraZeneca, Alderley Park, Macclesfield, SK10 4TG UK
| | - Shuwen Huang
- Genomic Diagnostics Laboratory, Manchester Centre for Genomic Medicine, Central Manchester University Hospitals NHS Foundation Trust, Saint Mary's Hospital, Oxford Road, Manchester, M13 9WL UK
| | - Hedley Carr
- Translational Science, Oncology Innovative Medicines Unit, AstraZeneca, Alderley Park, Macclesfield, SK10 4TG UK
| | - Andrew Wallace
- Genomic Diagnostics Laboratory, Manchester Centre for Genomic Medicine, Central Manchester University Hospitals NHS Foundation Trust, Saint Mary's Hospital, Oxford Road, Manchester, M13 9WL UK
| | - Miika Ahdesmaki
- R&D Information, AstraZeneca, Alderley Park, Macclesfield, SK10 4TG UK
| | - Sanjeev Bhaskar
- Genomic Diagnostics Laboratory, Manchester Centre for Genomic Medicine, Central Manchester University Hospitals NHS Foundation Trust, Saint Mary's Hospital, Oxford Road, Manchester, M13 9WL UK
| | - John Mills
- Personalised HealthCare and Biomarkers, Innovative Medicines and Early Development, AstraZeneca, Alderley Park, Macclesfield, SK10 4TG UK
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Mutational analysis of BRCA1/2 in a group of 134 consecutive ovarian cancer patients. Novel and recurrent BRCA1/2 alterations detected by next generation sequencing. J Appl Genet 2014; 56:193-8. [PMID: 25366421 PMCID: PMC4412280 DOI: 10.1007/s13353-014-0254-5] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2014] [Revised: 10/15/2014] [Accepted: 10/16/2014] [Indexed: 11/20/2022]
Abstract
The importance of proper mutational analysis of BRCA1/2 in individuals at risk for hereditary breast and ovarian cancer syndrome is widely accepted. Standard genetic screening includes targeted analysis of recurrent, population-specific mutations. The purpose of the study was to establish the frequency of germline BRCA1/2 mutations in a group of 134 unrelated patients with primary ovarian cancer. Next generation sequencing analysis revealed a presence of 20 (14.9 %) mutations, where 65 % (n = 13) were recurrent BRCA1 alterations included in the standard diagnostic panel in northern Poland. However, the remaining seven BRCA1/2 mutations (35 %) would be missed by the standard approach and were detected in unique patients. A substantial proportion (n = 5/12; 41 %) of mutation-positive individuals with complete family history reported no incidence of breast or ovarian cancer in their relatives. This observation, together with the raising perspectives for personalized therapy targeting BRCA1/2 signaling pathways indicates the necessity of comprehensive genetic screening in all ovarian cancer patients. However, due to the limited sensitivity of the standard genetic screening presented in this study (65 %) an application of next generation sequencing in molecular diagnostics of BRCA1/2 genes should be considered.
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Carvalho RS, Abreu RBV, Velkova A, Marsillac S, Rodarte RS, Suarez-Kurtz G, Iversen ES, Monteiro ANA, Carvalho MA. Probing structure-function relationships in missense variants in the carboxy-terminal region of BRCA1. PLoS One 2014; 9:e97766. [PMID: 24845084 PMCID: PMC4028255 DOI: 10.1371/journal.pone.0097766] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2014] [Accepted: 04/23/2014] [Indexed: 11/25/2022] Open
Abstract
Germline inactivating variants in BRCA1 lead to a significantly increased risk of breast and ovarian cancers in carriers. While the functional effect of many variants can be inferred from the DNA sequence, determining the effect of missense variants present a significant challenge. A series of biochemical and cell biological assays have been successfully used to explore the impact of these variants on the function of BRCA1, which contribute to assessing their likelihood of pathogenicity. It has been determined that variants that co-localize with structural or functional motifs are more likely to disrupt the stability and function of BRCA1. Here we assess the functional impact of 37 variants chosen to probe the functional impact of variants in phosphorylation sites and in the BRCT domains. In addition, we perform a meta-analysis of 170 unique variants tested by the transcription activation assays in the carboxy-terminal domain of BRCA1 using a recently developed computation model to provide assessment for functional impact and their likelihood of pathogenicity.
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Affiliation(s)
- Renato S Carvalho
- Cancer Epidemiology Program, H. Lee Moffitt Cancer Center & Research Institute, Tampa, Florida, United States of America; Programa de Farmacologia, Instituto Nacional de Câncer, Rio de Janeiro, RJ, Brazil
| | - Renata B V Abreu
- Programa de Farmacologia, Instituto Nacional de Câncer, Rio de Janeiro, RJ, Brazil
| | - Aneliya Velkova
- Cancer Epidemiology Program, H. Lee Moffitt Cancer Center & Research Institute, Tampa, Florida, United States of America
| | - Sylvia Marsillac
- Cancer Epidemiology Program, H. Lee Moffitt Cancer Center & Research Institute, Tampa, Florida, United States of America
| | | | | | - Edwin S Iversen
- Department of Statistical Science, Duke University, Durham, North Carolina, United States of America
| | - Alvaro N A Monteiro
- Cancer Epidemiology Program, H. Lee Moffitt Cancer Center & Research Institute, Tampa, Florida, United States of America
| | - Marcelo A Carvalho
- Programa de Farmacologia, Instituto Nacional de Câncer, Rio de Janeiro, RJ, Brazil; Instituto Federal de Educação, Ciência e Tecnologia do Rio de Janeiro, Rio de Janeiro, RJ, Brazil
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Pothuri B. BRCA1- and BRCA2-related mutations: therapeutic implications in ovarian cancer. Ann Oncol 2014; 24 Suppl 8:viii22-viii27. [PMID: 24131965 DOI: 10.1093/annonc/mdt307] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
Ovarian cancer is the deadliest among gynecologic cancers. Hereditary cancer related to BRCA1/2 gene mutations account for ~10%-12% of ovarian cancers. The BRCA1/2 proteins are important in homologous recombination (HR) repair of DNA. Patients with BRCA1/2 mutations have been reported to have improved chemosensitivity to platinum agents, longer disease-free intervals, and longer survivals than nonhereditary counterparts. Recent interest in poly(ADP-ribosyl) polymerase (PARP) proteins which are key components of base excision repair, has led to the development of PARP inhibitors; tumors arising in BRCA1/2 mutation carriers and/or with HR deficiency (HRD) are particularly sensitive to the action of these drugs. As 60%-80% of all advanced ovarian cancers are high-grade serous type, exhibiting HRD in at least 50% (referred as BRCAness) future antitumor strategies may depend on identifying these defects through molecular testing. Once HRD becomes amenable to routine testing, a larger group of ovarian cancer patients than are currently considered for PARP inhibitor trials, may benefit from such targeted therapy.
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Affiliation(s)
- B Pothuri
- Department of Obstetrics and Gynecology, Division of Gynecologic Oncology, NYU School of Medicine, New York, USA
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An Integrated in Silico Approach to Analyze the Involvement of Single Amino Acid Polymorphisms in FANCD1/BRCA2-PALB2 and FANCD1/BRCA2-RAD51 Complex. Cell Biochem Biophys 2014; 70:939-56. [DOI: 10.1007/s12013-014-0002-9] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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32
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Lee JH, Cragun D, Thompson Z, Coppola D, Nicosia SV, Akbari M, Zhang S, McLaughlin J, Narod S, Schildkraut J, Sellers TA, Pal T. Association between IHC and MSI testing to identify mismatch repair-deficient patients with ovarian cancer. Genet Test Mol Biomarkers 2014; 18:229-35. [PMID: 24592941 DOI: 10.1089/gtmb.2013.0393] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
OBJECTIVE In epithelial ovarian cancer, concordance between results of microsatellite instability (MSI) and immunohistochemical (IHC) testing has not been demonstrated. This study evaluated the association of MSI-high (MSI-H) status with loss of expression (LoE) of mismatch repair (MMR) proteins on IHC and assessed for potential factors affecting the strength of the association. METHODS Tumor specimens from three population-based studies of epithelial ovarian cancer were stained for MMR proteins through manual or automated methods, and results were interpreted by one of two pathologists. Tumor and germline DNA was extracted and MSI testing performed. Multivariable logistic regression models were fitted to predict loss of IHC expression based on MSI status after adjusting for staining method and reading pathologist. RESULTS Of 834 cases, 564 (67.6%) were concordant; 41 were classified as MSI-H with LoE and 523 as microsatellite stable (MSS) with no LoE. Of the 270 discordant cases, 83 were MSI-H with no LoE and 187 were MSS with LoE. Both IHC staining method and reading pathologist were strongly associated with discordant results. CONCLUSIONS Lack of concordance in the current study may be related to inconsistencies in IHC testing methods and interpretation. Results support the need for validation studies before routine screening of ovarian tumors is implemented in clinical practice for the purpose of identifying Lynch syndrome.
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Affiliation(s)
- Ji-Hyun Lee
- 1 Department of Biostatistics, H. Lee Moffitt Cancer Center , Tampa, Florida
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Smith SA, French T, Hollingsworth SJ. The impact of germline mutations on targeted therapy. J Pathol 2013; 232:230-43. [DOI: 10.1002/path.4273] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2013] [Revised: 09/16/2013] [Accepted: 09/18/2013] [Indexed: 12/17/2022]
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34
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van Altena AM, van Aarle S, Kiemeney LALM, Hoogerbrugge N, Massuger LFAG, de Hullu JA. Adequacy of family history taking in ovarian cancer patients: a population-based study. Fam Cancer 2013; 11:343-9. [PMID: 22388872 PMCID: PMC3496539 DOI: 10.1007/s10689-012-9518-6] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
The aim of this study was to evaluate the adequacy of family history taking in epithelial ovarian cancer (EOC) patients and to identify factors that determine adequacy. Furthermore, the validity of family history taking was assessed by comparison with self-administered questionnaires. Medical records of all 1,112 EOC patients registered by the nation-wide cancer registry and diagnosed in eleven Dutch hospitals between 1996 and 2006 were reviewed. Adequate family history taking was defined as a written notification of the presence or absence of relatives with breast or ovarian cancer. Factors that were correlated with family history taking were identified using univariable and multivariable logistic regression. 147 patients filled in a postal questionnaire. An adequate family history was taken in 41% of all cases. Younger age, an academic hospital and having undergone surgery and/or chemotherapy were associated with adequate family history taking. The comparison with self-administered questionnaires showed a disagreement in 64% mainly due to missing data in medical records. Documentation on family history is either absent or inadequate in the medical records in the majority of EOC patients. These data urge for better uptake of hereditary cancer risk assessment. Different strategies for this assessment like improved family history taking and genetic testing in EOC patients should be explored.
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Affiliation(s)
- Anne M van Altena
- Department of Obstetrics and Gynecology, Radboud University Medical Centre, P.O. Box 9101, 6500 HB, Nijmegen, The Netherlands.
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Stavropoulou AV, Fostira F, Pertesi M, Tsitlaidou M, Voutsinas GE, Triantafyllidou O, Bamias A, Dimopoulos MA, Timotheadou E, Pectasides D, Christodoulou C, Klouvas G, Papadimitriou C, Makatsoris T, Pentheroudakis G, Aravantinos G, Karydakis V, Yannoukakos D, Fountzilas G, Konstantopoulou I. Prevalence of BRCA1 mutations in familial and sporadic greek ovarian cancer cases. PLoS One 2013; 8:e58182. [PMID: 23536787 PMCID: PMC3594241 DOI: 10.1371/journal.pone.0058182] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2012] [Accepted: 01/31/2013] [Indexed: 12/20/2022] Open
Abstract
Germline mutations in the BRCA1 and BRCA2 genes contribute to approximately 18% of hereditary ovarian cancers conferring an estimated lifetime risk from 15% to 50%. A variable incidence of mutations has been reported for these genes in ovarian cancer cases from different populations. In Greece, six mutations in BRCA1 account for 63% of all mutations detected in both BRCA1 and BRCA2 genes. This study aimed to determine the prevalence of BRCA1 mutations in a Greek cohort of 106 familial ovarian cancer patients that had strong family history or metachronous breast cancer and 592 sporadic ovarian cancer cases. All 698 patients were screened for the six recurrent Greek mutations (including founder mutations c.5266dupC, p.G1738R and the three large deletions of exon 20, exons 23-24 and exon 24). In familial cases, the BRCA1 gene was consequently screened for exons 5, 11, 12, 20, 21, 22, 23, 24. A deleterious BRCA1 mutation was found in 43/106 (40.6%) of familial cancer cases and in 27/592 (4.6%) of sporadic cases. The variant of unknown clinical significance p.V1833M was identified in 9/698 patients (1.3%). The majority of BRCA1 carriers (71.2%) presented a high-grade serous phenotype. Identifying a mutation in the BRCA1 gene among breast and/or ovarian cancer families is important, as it enables carriers to take preventive measures. All ovarian cancer patients with a serous phenotype should be considered for genetic testing. Further studies are warranted to determine the prevalence of mutations in the rest of the BRCA1 gene, in the BRCA2 gene, and other novel predisposing genes for breast and ovarian cancer.
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Affiliation(s)
- Alexandra V. Stavropoulou
- Molecular Diagnostics Laboratory, INRaSTES, National Center for Scientific Research “Demokritos”, Athens, Greece
| | - Florentia Fostira
- Molecular Diagnostics Laboratory, INRaSTES, National Center for Scientific Research “Demokritos”, Athens, Greece
| | - Maroulio Pertesi
- Molecular Diagnostics Laboratory, INRaSTES, National Center for Scientific Research “Demokritos”, Athens, Greece
| | - Marianthi Tsitlaidou
- Molecular Diagnostics Laboratory, INRaSTES, National Center for Scientific Research “Demokritos”, Athens, Greece
| | - Gerassimos E. Voutsinas
- Laboratory of Environmental Mutagenesis and Carcinogenesis, Institute of Biosciences and Applications, National Center for Scientific Research “Demokritos”, Athens, Greece
| | - Olga Triantafyllidou
- Molecular Diagnostics Laboratory, INRaSTES, National Center for Scientific Research “Demokritos”, Athens, Greece
| | - Aristotelis Bamias
- Department of Clinical Therapeutics, Alexandra Hospital, University of Athens School of Medicine, Athens, Greece
| | - Meletios A. Dimopoulos
- Department of Clinical Therapeutics, Alexandra Hospital, University of Athens School of Medicine, Athens, Greece
| | - Eleni Timotheadou
- Department of Medical Oncology, Papageorgiou Hospital, Aristotle University of Thessaloniki School of Medicine, Thessaloniki, Greece
| | - Dimitrios Pectasides
- Oncology Section, Second Department of Internal Medicine, “Hippokration” Hospital, Athens, Greece
| | | | - George Klouvas
- Second Department of Medical Oncology, “Metropolitan” Hospital, Piraeus, Greece
| | - Christos Papadimitriou
- Department of Clinical Therapeutics, Alexandra Hospital, University of Athens School of Medicine, Athens, Greece
| | - Thomas Makatsoris
- Division of Oncology, Department of Medicine, University Hospital, University of Patras Medical School, Patras, Greece
| | | | - Gerasimos Aravantinos
- Second Department of Medical Oncology, “Agii Anargiri” Cancer Hospital, Athens, Greece
| | | | - Drakoulis Yannoukakos
- Molecular Diagnostics Laboratory, INRaSTES, National Center for Scientific Research “Demokritos”, Athens, Greece
| | - George Fountzilas
- Department of Medical Oncology, Papageorgiou Hospital, Aristotle University of Thessaloniki School of Medicine, Thessaloniki, Greece
| | - Irene Konstantopoulou
- Molecular Diagnostics Laboratory, INRaSTES, National Center for Scientific Research “Demokritos”, Athens, Greece
- * E-mail:
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Shanmughapriya S, Nachiappan V, Natarajaseenivasan K. BRCA1 and BRCA2 Mutations in the Ovarian Cancer Population across Race and Ethnicity: Special Reference to Asia. Oncology 2013; 84:226-32. [DOI: 10.1159/000346593] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2012] [Accepted: 12/17/2012] [Indexed: 01/17/2023]
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Brain metastasis as an initial manifestation of ovarian carcinoma: a case report. Case Rep Med 2012; 2012:735026. [PMID: 23316241 PMCID: PMC3539383 DOI: 10.1155/2012/735026] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2012] [Accepted: 12/11/2012] [Indexed: 12/05/2022] Open
Abstract
Brain metastasis is a rare and late manifestation of ovarian carcinoma. A 30-year-old woman initially presenting with neurologic symptoms was later found to have mucinous ovarian carcinoma. The patient had a 6 cm adnexal mass with multiple millimetric brain metastatic lesions. Following a surgical staging laparotomy procedure, the patient received brain irradiation and systemic chemotherapy.
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Dekker N, van Dorst EBL, van der Luijt RB, van Gijn ME, van Tuil M, Offerhaus JA, Ausems MGEM. Acceptance of genetic counseling and testing in a hospital-based series of patients with gynecological cancer. J Genet Couns 2012. [PMID: 23192360 DOI: 10.1007/s10897-012-9553-3] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Referral of patients with endometrial (EC) and/or ovarian cancer (OC) for genetic counseling is based on age at diagnosis and family history. Many patients with hereditary cancers are missed by following this strategy. We determined acceptance and mutation detection rate of offering genetic counseling and testing to unselected EC and OC patients. Therefore, in 2007, EC and OC patients were invited for genetic counseling and testing. Patients were asked for their reasons to accept or decline. Nineteen out of fifty-two EC patients (36 %) and twenty-two out of thirty-five OC patients (63 %) accepted genetic counseling, mainly to receive risk assessment for themselves and relatives. Counseling was declined mainly because patients did not want more tests or had no relatives for whom it was relevant. Eighteen out of nineteen EC patients (95 %) and twenty out of twenty-two OC patients (91 %) underwent genetic testing. One EC patient carried an MSH6 mutation (mutation detection rate: 6 %). BRCA1/2 mutations were found in two out of twenty OC patients (10 %). Eleven patients (29 %) received surveillance recommendations for themselves and their relatives. Finally, family history recorded by the gynecologist was compared to that taken by the clinical geneticist. Gynecologists reported family history in ten out of forty-one participants (24 %). In conclusion, genetic counseling and testing are acceptable to patients with OC and/or EC. The 10 % BRCA1/2 mutation detection rate and underreporting of family history by gynecologists warrant referral for genetic counseling for all OC patients, followed by BRCA1/2 testing if indicated. We recommend that microsatellite instability and immunohistochemical analysis be performed in all EC patients, followed by genetic counseling if appropriate. These strategies will lead to better cancer prevention in gynecological cancer patients and their relatives.
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Affiliation(s)
- Nicky Dekker
- Department of Reproductive Medicine and Gynaecology, University Medical Center Utrecht, Utrecht, the Netherlands
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Alsop K, Fereday S, Meldrum C, deFazio A, Emmanuel C, George J, Dobrovic A, Birrer MJ, Webb PM, Stewart C, Friedlander M, Fox S, Bowtell D, Mitchell G. BRCA mutation frequency and patterns of treatment response in BRCA mutation-positive women with ovarian cancer: a report from the Australian Ovarian Cancer Study Group. J Clin Oncol 2012; 30:2654-63. [PMID: 22711857 DOI: 10.1200/jco.2011.39.8545] [Citation(s) in RCA: 904] [Impact Index Per Article: 75.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
PURPOSE The frequency of BRCA1 and BRCA2 germ-line mutations in women with ovarian cancer is unclear; reports vary from 3% to 27%. The impact of germ-line mutation on response requires further investigation to understand its impact on treatment planning and clinical trial design. PATIENTS AND METHODS Women with nonmucinous ovarian carcinoma (n = 1,001) enrolled onto a population-based, case-control study were screened for point mutations and large deletions in both genes. Survival outcomes and responses to multiple lines of chemotherapy were assessed. RESULTS Germ-line mutations were found in 14.1% of patients overall, including 16.6% of serous cancer patients (high-gradeserous, 17.1%); [corrected] 44% had no reported family history of breast orovarian cancer.Patients carrying germ-line mutations had improved rates of progression-free and overall survival. In the relapse setting, patients carrying mutations more frequently responded to both platin- and nonplatin-based regimens than mutation-negative patients, even in patients with early relapse after primary treatment. Mutation-negative patients who responded to multiple cycles of platin-based treatment were more likely to carry somatic BRCA1/2 mutations. CONCLUSION BRCA mutation status has a major influence on survival in ovarian cancer patients and should be an additional stratification factor in clinical trials. Treatment outcomes in BRCA1/2 carriers challenge conventional definitions of platin resistance, and mutation status may be able to contribute to decision making and systemic therapy selection in the relapse setting. Our data, together with the advent of poly(ADP-ribose) polymerase inhibitor trials, supports the recommendation that germ-line BRCA1/2 testing should be offered to all women diagnosed with nonmucinous, ovarian carcinoma, regardless of family history.
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Affiliation(s)
- Kathryn Alsop
- Peter MacCallum Cancer Centre, St Andrews Place, East Melbourne, Victoria 3002, Australia
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Griffiths SE, Lopes T, Edmondson RJ. The role of prophylactic salpingo-oophorectomy in women who carry mutations of the BRCA genes. ACTA ACUST UNITED AC 2011. [DOI: 10.1576/toag.7.1.023.27038] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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41
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A clinical perspective on genetic counseling and testing during end of life care for women with recurrent progressive ovarian cancer: opportunities and challenges. Fam Cancer 2011; 10:193-7. [PMID: 21246292 DOI: 10.1007/s10689-011-9418-1] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
10-15% of invasive epithelial ovarian cancer is attributable to hereditary breast and ovarian cancer. The identification of BRCA1/BRCA2 mutations in women with ovarian cancer allows for accurate predictive genetic testing of their at-risk relatives, who can then avail themselves of early detection and risk reduction strategies. In the case of women with recurrent progressive ovarian cancer, the window of opportunity for genetic testing can be particularly limited. Here we describe our perspective on providing genetic counseling during these patients' end of life care, incorporating two illustrative examples from our clinical practice. While these situations pose unique challenges, they also present a significant opportunity to benefit the patient and her family. Further attention and research should be directed towards provision of genetic counseling and testing during end of life care.
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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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Iyevleva AG, Suspitsin EN, Kroeze K, Gorodnova TV, Sokolenko AP, Buslov KG, Voskresenskiy DA, Togo AV, Kovalenko SP, Stoep NVD, Devilee P, Imyanitov EN. Non-founder BRCA1 mutations in Russian breast cancer patients. Cancer Lett 2010; 298:258-63. [PMID: 20727672 DOI: 10.1016/j.canlet.2010.07.013] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2010] [Revised: 07/11/2010] [Accepted: 07/13/2010] [Indexed: 11/27/2022]
Abstract
A few founder BRCA1 mutations (5382insC, 4154delA, 185delAG) account for up to 15% of high-risk (young-onset or familial or bilateral) breast cancer (BC) cases in Russia. The impact of non-founder BRCA1 mutations in this country is less studied; in particular, there are no reports analyzing gross rearrangements of this gene in the Russian patient series. We selected for the study 95 founder mutation negative high-risk BC cases. Combination of high-resolution melting (HRM) and sequencing revealed six presumably BC-associated alleles (2080delA, 4808C>G, 5214C>T, 5236G>A, 5460G>T, 5622C>T) and one variant of an unknown significance (4885G>A). The pathogenic role of the 5236G>A mutation leading to G1706E substitution was further confirmed by the loss of heterozygosity analysis of the corresponding tumor tissue. Multiplex ligation-dependent probe amplification (MLPA) revealed two additional BRCA1 heterozygotes, which carried BRCA1 deletions involving exons 1-2 and 3-7, respectively. Based on the results of this investigation and the review of prior Russian studies, three BRCA1 mutations (2080delA, 3819del5, 3875del4) were considered with respect to their possible founder effect and tested in the additional series of 210 high-risk BC patients; two BRCA heterozygotes (2080delA and 3819del5) were revealed. We conclude that the non-founder mutations constitute the minority of BRCA1 defects in Russia.
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Trainer AH, Meiser B, Watts K, Mitchell G, Tucker K, Friedlander M. Moving Toward Personalized Medicine: Treatment-Focused Genetic Testing of Women Newly Diagnosed With Ovarian Cancer. Int J Gynecol Cancer 2010; 20:704-16. [DOI: 10.1111/igc.0b013e3181dbd1a5] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022] Open
Abstract
Objectives:The presence of a germline BRCA mutation defines a genotype-specific group of women whose invasive ovarian cancer is associated with an increasingly well-defined prognostic and chemosensitivity biological profile. To determine the criteria that may be used to select patients for BRCA treatment-focused genetic testing, we performed a systemic literature search of studies that assessed BRCA1 and BRCA2 mutation frequency in women with ovarian cancer unselected for family history. The results are discussed with regard to the added clinical value gained by identifying a germline BRCA mutation at the time of the ovarian cancer diagnosis.Methods:BRCA-related studies were identified in the CD-ROM databases PubMed (including MEDLINE), PsychINFO, and CINAHL and included in the review if they met the following criteria: they (a) assessed mutation frequency in women with ovarian cancer who were unselected for family history and ethnicity, (b) were published in a peer-review journal, (c) between January 1997 and October 2009, and (d) in the English language.Results:Studies investigating the prevalence of BRCA1 or BRCA2 mutations in ovarian cancer patients unselected for family history or ethnicity have found a pathological BRCA mutation rate of approximately 3% to 17%. Without a significant family history, specific features that may be used to target treatment-focused BRCA testing in the ovarian cancer setting include young age at onset (<50 years), high-grade serous tumor histology, and specific ethnicity associated with known BRCA founder mutations.Conclusions:We believe that given the growing appreciation of the prognostic significance of BRCA mutations and the differential chemosensitivity shown by these tumors, as well as the potential of novel agents such as poly(ADP-ribose) polymerase inhibitors, the identification of a germline BRCA mutation concurrent with a new diagnosis of ovarian cancer will significantly impact on tailoring personalized ovarian management in the future.
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Gourley C, Michie CO, Roxburgh P, Yap TA, Harden S, Paul J, Ragupathy K, Todd R, Petty R, Reed N, Hayward RL, Mitchell P, Rye T, Schellens JH, Lubinski J, Carmichael J, Kaye SB, Mackean M, Ferguson M. Increased Incidence of Visceral Metastases in Scottish Patients With BRCA1/2-Defective Ovarian Cancer: An Extension of the Ovarian BRCAness Phenotype. J Clin Oncol 2010; 28:2505-11. [PMID: 20406939 DOI: 10.1200/jco.2009.25.1082] [Citation(s) in RCA: 71] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Purpose To compare the frequency of visceral relapse of BRCA1/2-deficient ovarian cancer to that of nonhereditary controls. Patients and Methods All patients diagnosed in Scotland with epithelial ovarian cancer (EOC) or primary peritoneal cancer (PPC) and a germline BRCA1/2 mutation were identified. Those with previous malignancy were excluded. Each remaining patient who experienced relapse was matched with two nonhereditary controls. Results Seventy-nine patients with EOC/PPC and germline BRCA1/2 mutations were identified. Fifteen had inadequate clinical data, two had carcinosarcoma, 27 had previous breast cancer, and 16 were in remission. Of the remaining 19 patients who were BRCA1/2 deficient, 14 patients (74%) developed visceral metastases compared with six (16%) of 38 patients in the control group. The percentages of liver, lung, and splenic metastases were 53%, 32%, and 32%, respectively, in the patients compared with 5%, 3%, and 5%, respectively, in the controls. When events occurring outside the matched follow-up period were omitted, the percentages of visceral, liver, lung, and splenic metastases were 58%, 42%, 16%, and 32% in the patients compared with 5%, 0%, 0%, and 3% in controls (P < .001, P < .001, P = .066, and P = .011, respectively). In an independent validation set, the corresponding percentages of visceral, liver, lung, and splenic metastases were 63%, 46%, 13%, and 17% in the patients compared with 11%, 4%, 2%, and 2% in controls (P < .001, P < .001, P = .153, and P = .052, respectively). Conclusion Although sporadic EOC commonly remains confined to the peritoneum, BRCA1/2-deficient ovarian cancer frequently metastasizes to viscera. These data extend the ovarian BRCAness phenotype, imply BRCA1/2-deficient ovarian cancer is biologically distinct, and suggest that patients with visceral metastases should be considered for BRCA1/2 sequencing.
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Affiliation(s)
- Charlie Gourley
- From the University of Edinburgh Cancer Research Centre, Institute of Genetics and Molecular Medicine, Western General Hospital, Edinburgh; Cancer Research United Kingdom Clinical Trials Unit, Beatson West of Scotland Cancer Centre Level 0, Glasgow; ANCHOR Unit and University of Aberdeen, Aberdeen Royal Infirmary, Foresterhill, Aberdeen; Cancer Medicine Research Programme, Section of Translational Medical Sciences, School of Medicine and Dentistry, University of Aberdeen, Foresterhill, Aberdeen,
| | - Caroline O. Michie
- From the University of Edinburgh Cancer Research Centre, Institute of Genetics and Molecular Medicine, Western General Hospital, Edinburgh; Cancer Research United Kingdom Clinical Trials Unit, Beatson West of Scotland Cancer Centre Level 0, Glasgow; ANCHOR Unit and University of Aberdeen, Aberdeen Royal Infirmary, Foresterhill, Aberdeen; Cancer Medicine Research Programme, Section of Translational Medical Sciences, School of Medicine and Dentistry, University of Aberdeen, Foresterhill, Aberdeen,
| | - Patricia Roxburgh
- From the University of Edinburgh Cancer Research Centre, Institute of Genetics and Molecular Medicine, Western General Hospital, Edinburgh; Cancer Research United Kingdom Clinical Trials Unit, Beatson West of Scotland Cancer Centre Level 0, Glasgow; ANCHOR Unit and University of Aberdeen, Aberdeen Royal Infirmary, Foresterhill, Aberdeen; Cancer Medicine Research Programme, Section of Translational Medical Sciences, School of Medicine and Dentistry, University of Aberdeen, Foresterhill, Aberdeen,
| | - Timothy A. Yap
- From the University of Edinburgh Cancer Research Centre, Institute of Genetics and Molecular Medicine, Western General Hospital, Edinburgh; Cancer Research United Kingdom Clinical Trials Unit, Beatson West of Scotland Cancer Centre Level 0, Glasgow; ANCHOR Unit and University of Aberdeen, Aberdeen Royal Infirmary, Foresterhill, Aberdeen; Cancer Medicine Research Programme, Section of Translational Medical Sciences, School of Medicine and Dentistry, University of Aberdeen, Foresterhill, Aberdeen,
| | - Sharon Harden
- From the University of Edinburgh Cancer Research Centre, Institute of Genetics and Molecular Medicine, Western General Hospital, Edinburgh; Cancer Research United Kingdom Clinical Trials Unit, Beatson West of Scotland Cancer Centre Level 0, Glasgow; ANCHOR Unit and University of Aberdeen, Aberdeen Royal Infirmary, Foresterhill, Aberdeen; Cancer Medicine Research Programme, Section of Translational Medical Sciences, School of Medicine and Dentistry, University of Aberdeen, Foresterhill, Aberdeen,
| | - Jim Paul
- From the University of Edinburgh Cancer Research Centre, Institute of Genetics and Molecular Medicine, Western General Hospital, Edinburgh; Cancer Research United Kingdom Clinical Trials Unit, Beatson West of Scotland Cancer Centre Level 0, Glasgow; ANCHOR Unit and University of Aberdeen, Aberdeen Royal Infirmary, Foresterhill, Aberdeen; Cancer Medicine Research Programme, Section of Translational Medical Sciences, School of Medicine and Dentistry, University of Aberdeen, Foresterhill, Aberdeen,
| | - Kalpana Ragupathy
- From the University of Edinburgh Cancer Research Centre, Institute of Genetics and Molecular Medicine, Western General Hospital, Edinburgh; Cancer Research United Kingdom Clinical Trials Unit, Beatson West of Scotland Cancer Centre Level 0, Glasgow; ANCHOR Unit and University of Aberdeen, Aberdeen Royal Infirmary, Foresterhill, Aberdeen; Cancer Medicine Research Programme, Section of Translational Medical Sciences, School of Medicine and Dentistry, University of Aberdeen, Foresterhill, Aberdeen,
| | - Radha Todd
- From the University of Edinburgh Cancer Research Centre, Institute of Genetics and Molecular Medicine, Western General Hospital, Edinburgh; Cancer Research United Kingdom Clinical Trials Unit, Beatson West of Scotland Cancer Centre Level 0, Glasgow; ANCHOR Unit and University of Aberdeen, Aberdeen Royal Infirmary, Foresterhill, Aberdeen; Cancer Medicine Research Programme, Section of Translational Medical Sciences, School of Medicine and Dentistry, University of Aberdeen, Foresterhill, Aberdeen,
| | - Russell Petty
- From the University of Edinburgh Cancer Research Centre, Institute of Genetics and Molecular Medicine, Western General Hospital, Edinburgh; Cancer Research United Kingdom Clinical Trials Unit, Beatson West of Scotland Cancer Centre Level 0, Glasgow; ANCHOR Unit and University of Aberdeen, Aberdeen Royal Infirmary, Foresterhill, Aberdeen; Cancer Medicine Research Programme, Section of Translational Medical Sciences, School of Medicine and Dentistry, University of Aberdeen, Foresterhill, Aberdeen,
| | - Nick Reed
- From the University of Edinburgh Cancer Research Centre, Institute of Genetics and Molecular Medicine, Western General Hospital, Edinburgh; Cancer Research United Kingdom Clinical Trials Unit, Beatson West of Scotland Cancer Centre Level 0, Glasgow; ANCHOR Unit and University of Aberdeen, Aberdeen Royal Infirmary, Foresterhill, Aberdeen; Cancer Medicine Research Programme, Section of Translational Medical Sciences, School of Medicine and Dentistry, University of Aberdeen, Foresterhill, Aberdeen,
| | - Richard L. Hayward
- From the University of Edinburgh Cancer Research Centre, Institute of Genetics and Molecular Medicine, Western General Hospital, Edinburgh; Cancer Research United Kingdom Clinical Trials Unit, Beatson West of Scotland Cancer Centre Level 0, Glasgow; ANCHOR Unit and University of Aberdeen, Aberdeen Royal Infirmary, Foresterhill, Aberdeen; Cancer Medicine Research Programme, Section of Translational Medical Sciences, School of Medicine and Dentistry, University of Aberdeen, Foresterhill, Aberdeen,
| | - Paul Mitchell
- From the University of Edinburgh Cancer Research Centre, Institute of Genetics and Molecular Medicine, Western General Hospital, Edinburgh; Cancer Research United Kingdom Clinical Trials Unit, Beatson West of Scotland Cancer Centre Level 0, Glasgow; ANCHOR Unit and University of Aberdeen, Aberdeen Royal Infirmary, Foresterhill, Aberdeen; Cancer Medicine Research Programme, Section of Translational Medical Sciences, School of Medicine and Dentistry, University of Aberdeen, Foresterhill, Aberdeen,
| | - Tzyvia Rye
- From the University of Edinburgh Cancer Research Centre, Institute of Genetics and Molecular Medicine, Western General Hospital, Edinburgh; Cancer Research United Kingdom Clinical Trials Unit, Beatson West of Scotland Cancer Centre Level 0, Glasgow; ANCHOR Unit and University of Aberdeen, Aberdeen Royal Infirmary, Foresterhill, Aberdeen; Cancer Medicine Research Programme, Section of Translational Medical Sciences, School of Medicine and Dentistry, University of Aberdeen, Foresterhill, Aberdeen,
| | - Jan H.M. Schellens
- From the University of Edinburgh Cancer Research Centre, Institute of Genetics and Molecular Medicine, Western General Hospital, Edinburgh; Cancer Research United Kingdom Clinical Trials Unit, Beatson West of Scotland Cancer Centre Level 0, Glasgow; ANCHOR Unit and University of Aberdeen, Aberdeen Royal Infirmary, Foresterhill, Aberdeen; Cancer Medicine Research Programme, Section of Translational Medical Sciences, School of Medicine and Dentistry, University of Aberdeen, Foresterhill, Aberdeen,
| | - Jan Lubinski
- From the University of Edinburgh Cancer Research Centre, Institute of Genetics and Molecular Medicine, Western General Hospital, Edinburgh; Cancer Research United Kingdom Clinical Trials Unit, Beatson West of Scotland Cancer Centre Level 0, Glasgow; ANCHOR Unit and University of Aberdeen, Aberdeen Royal Infirmary, Foresterhill, Aberdeen; Cancer Medicine Research Programme, Section of Translational Medical Sciences, School of Medicine and Dentistry, University of Aberdeen, Foresterhill, Aberdeen,
| | - James Carmichael
- From the University of Edinburgh Cancer Research Centre, Institute of Genetics and Molecular Medicine, Western General Hospital, Edinburgh; Cancer Research United Kingdom Clinical Trials Unit, Beatson West of Scotland Cancer Centre Level 0, Glasgow; ANCHOR Unit and University of Aberdeen, Aberdeen Royal Infirmary, Foresterhill, Aberdeen; Cancer Medicine Research Programme, Section of Translational Medical Sciences, School of Medicine and Dentistry, University of Aberdeen, Foresterhill, Aberdeen,
| | - Stan B. Kaye
- From the University of Edinburgh Cancer Research Centre, Institute of Genetics and Molecular Medicine, Western General Hospital, Edinburgh; Cancer Research United Kingdom Clinical Trials Unit, Beatson West of Scotland Cancer Centre Level 0, Glasgow; ANCHOR Unit and University of Aberdeen, Aberdeen Royal Infirmary, Foresterhill, Aberdeen; Cancer Medicine Research Programme, Section of Translational Medical Sciences, School of Medicine and Dentistry, University of Aberdeen, Foresterhill, Aberdeen,
| | - Melanie Mackean
- From the University of Edinburgh Cancer Research Centre, Institute of Genetics and Molecular Medicine, Western General Hospital, Edinburgh; Cancer Research United Kingdom Clinical Trials Unit, Beatson West of Scotland Cancer Centre Level 0, Glasgow; ANCHOR Unit and University of Aberdeen, Aberdeen Royal Infirmary, Foresterhill, Aberdeen; Cancer Medicine Research Programme, Section of Translational Medical Sciences, School of Medicine and Dentistry, University of Aberdeen, Foresterhill, Aberdeen,
| | - Michelle Ferguson
- From the University of Edinburgh Cancer Research Centre, Institute of Genetics and Molecular Medicine, Western General Hospital, Edinburgh; Cancer Research United Kingdom Clinical Trials Unit, Beatson West of Scotland Cancer Centre Level 0, Glasgow; ANCHOR Unit and University of Aberdeen, Aberdeen Royal Infirmary, Foresterhill, Aberdeen; Cancer Medicine Research Programme, Section of Translational Medical Sciences, School of Medicine and Dentistry, University of Aberdeen, Foresterhill, Aberdeen,
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Einbeigi Z, Enerbäck C, Wallgren A, Nordling M, Karlsson P. BRCA1 gene mutations may explain more than 80% of excess number of ovarian cancer cases after breast cancer - a population based study from the Western Sweden Health Care region. Acta Oncol 2010; 49:361-7. [PMID: 20151938 DOI: 10.3109/02841860903521095] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
AIM In a previous cohort study, we showed that there was a significant variation in the frequency of ovarian cancer after having breast cancer in Sweden, with the highest risk occuring in the Western region. The present study aimed to evaluate whether the high prevalence of the founder mutation BRCA1 3171ins5 may explain the excess number of ovarian cancer. METHOD Among more than 26 000 women with breast cancer in the Western Swedish Health Care Region, 159 cases were subsequently diagnosed with ovarian cancer, whereas the expected number was 96. Archived tissue material was analysed for six common Scandinavian BRCA1 and BRCA2 gene mutations. RESULTS The excess number of cases was 63 (95% CI 47-77), based on person-years at risk and national incidence rates of ovarian cancer. A BRCA1 gene mutation was detected in 33 cases corresponding to 52% of the excess number. The founder mutation, BRCA1 3171ins5, was detected in 44% of the excess number. The identified mutations decreased from 45% in women less than 50 years of age at follow-up to 14% at 60+ years at follow-up. There was no obvious decrease in mutation frequency by excess numbers with age. Age at follow-up and first-degree relatives with breast and/or ovarian cancer were the best predictors of a mutation in this material. CONCLUSION The founder mutation, BRCA1 3171ins5, explains the excess of ovarian cancer after breast cancer in the region. From the relative frequency of the studied mutations found at the cancer genetic counselling clinic, it is estimated that BRCA1 gene mutations are associated with about 80-85% of the excess cases. This means that a negative screening for these mutations in similar cases may have a predictive value and could strongly reduce the risk of ovarian cancer in relatives.
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Affiliation(s)
- Zakaria Einbeigi
- Department of Oncology, Sahlgrenska University Hospital, SE-413 45 Göteborg, Sweden.
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Kwon JS, Daniels MS, Sun CC, Lu KH. Preventing future cancers by testing women with ovarian cancer for BRCA mutations. J Clin Oncol 2009; 28:675-82. [PMID: 19841329 DOI: 10.1200/jco.2008.21.4684] [Citation(s) in RCA: 59] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Abstract
PURPOSE Women with ovarian cancer have a 10% probability of carrying a BRCA mutation. If a mutation is identified, unaffected family members can undergo genetic testing and cancer risk-reducing strategies. We estimated the net health benefits and cost-effectiveness of different criteria for BRCA mutation testing in women with ovarian cancer, and the downstream benefits for their first-degree relatives (FDRs). METHODS We developed a Markov Monte Carlo simulation model to compare four criteria for BRCA testing in women with ovarian cancer: no testing (reference); only if personal history of breast cancer, family history of breast/ovarian cancer, or Ashkenazi Jewish ancestry; only if invasive serous cancer; any invasive nonmucinous epithelial cancer. Net health benefit was life expectancy for FDRs and primary outcome was the incremental cost-effectiveness ratio (ICER). The model estimated the number of future breast and ovarian cancer cases in FDRs. RESULTS BRCA testing based on personal/family history and ancestry could prevent future cases in FDRs with an ICER of $32,018 per year of life (LY) gained compared with the reference strategy. BRCA testing based on serous or any nonmucinous epithelial ovarian cancer could prevent more cancer cases, but at ICERs of $128,465 and $148,363 per LY gained, respectively. CONCLUSION BRCA testing of women with ovarian cancer based on personal/family history of cancer or Ashkenazi Jewish ancestry is a cost-effective strategy to prevent future breast and ovarian cancers among FDRs. More inclusive testing strategies prevent additional cancer cases but at significant cost.
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Affiliation(s)
- Janice S Kwon
- Division of Gynecologic Oncology, University of British Columbia, British Columbia, Canada.
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Daniels MS, Urbauer DL, Stanley JL, Johnson KG, Lu KH. Timing of BRCA1/BRCA2 genetic testing in women with ovarian cancer. Genet Med 2009; 11:624-8. [DOI: 10.1097/gim.0b013e3181ab2295] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
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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: 155] [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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Suspitsin EN, Sherina NY, Ponomariova DN, Sokolenko AP, Iyevleva AG, Gorodnova TV, Zaitseva OA, Yatsuk OS, Togo AV, Tkachenko NN, Shiyanov GA, Lobeiko OS, Krylova NY, Matsko DE, Maximov SY, Urmancheyeva AF, Porhanova NV, Imyanitov EN. High frequency of BRCA1, but not CHEK2 or NBS1 (NBN), founder mutations in Russian ovarian cancer patients. Hered Cancer Clin Pract 2009; 7:5. [PMID: 19338682 PMCID: PMC2664323 DOI: 10.1186/1897-4287-7-5] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2008] [Accepted: 02/25/2009] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND A significant portion of ovarian cancer (OC) cases is caused by germ-line mutations in BRCA1 or BRCA2 genes. BRCA testing is cheap in populations with founder effect and therefore recommended for all patients with OC diagnosis. Recurrent mutations constitute the vast majority of BRCA defects in Russia, however their impact in OC morbidity has not been yet systematically studied. Furthermore, Russian population is characterized by a relatively high frequency of CHEK2 and NBS1 (NBN) heterozygotes, but it remains unclear whether these two genes contribute to the OC risk. METHODS The study included 354 OC patients from 2 distinct, geographically remote regions (290 from North-Western Russia (St.-Petersburg) and 64 from the south of the country (Krasnodar)). DNA samples were tested by allele-specific PCR for the presence of 8 founder mutations (BRCA1 5382insC, BRCA1 4153delA, BRCA1 185delAG, BRCA1 300T>G, BRCA2 6174delT, CHEK2 1100delC, CHEK2 IVS2+1G>A, NBS1 657del5). In addition, literature data on the occurrence of BRCA1, BRCA2, CHEK2 and NBS1 mutations in non-selected ovarian cancer patients were reviewed. RESULTS BRCA1 5382insC allele was detected in 28/290 (9.7%) OC cases from the North-West and 11/64 (17.2%) OC patients from the South of Russia. In addition, 4 BRCA1 185delAG, 2 BRCA1 4153delA, 1 BRCA2 6174delT, 2 CHEK2 1100delC and 1 NBS1 657del5 mutation were detected. 1 patient from Krasnodar was heterozygous for both BRCA1 5382insC and NBS1 657del5 variants. CONCLUSION Founder BRCA1 mutations, especially BRCA1 5382insC variant, are responsible for substantial share of OC morbidity in Russia, therefore DNA testing has to be considered for every OC patient of Russian origin. Taken together with literature data, this study does not support the contribution of CHEK2 in OC risk, while the role of NBS1 heterozygosity may require further clarification.
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Affiliation(s)
- Evgeny N Suspitsin
- Laboratory of Molecular Oncology, N,N, Petrov Institute of Oncology, St, Petersburg, Russia.
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