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Abstract
The partner and localiser of BRCA2 (PALB2) gene, located on chromosome 16, functions as a tumour suppressor that plays a critical role in homologous recombination repair after DNA double-strand breaks. It encodes proteins involved in the BRCA2 and BRCA1, and RAD51 pathways. Heterozygous germline mutations in PALB2 have been implicated in the development of breast, pancreatic and ovarian cancers. Whereas biallelic mutations of PALB2 have been associated with Fanconi anaaemia. Currently, 604 distinct PALB2 variants have been discovered. However, only 140 variants are thought to be pathogenic and approximately 400 are variants of unknown significance. Further studies are needed before the presence of PLAB2 mutations can be implemented as a routine clinical biomarker.
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Affiliation(s)
- Omar Hamdan
- University Health Network Laboratory Medicine Program, Toronto, Ontario, Canada
| | - Klaudia M Nowak
- University Health Network Laboratory Medicine Program, Toronto, Ontario, Canada
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2
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Caleca L, Radice P. Refinement of the assignment to the ACMG/AMP BS3 and PS3 criteria of eight BRCA1 variants of uncertain significance by integrating available functional data with protein interaction assays. Front Oncol 2023; 13:1146604. [PMID: 37168384 PMCID: PMC10164951 DOI: 10.3389/fonc.2023.1146604] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2023] [Accepted: 04/06/2023] [Indexed: 05/13/2023] Open
Abstract
The clinical screening of cancer predisposition genes has led to the identification of a large number of variants of uncertain significance (VUS). Multifactorial likelihood models that predict the odds ratio for VUS in favor or against cancer causality, have been developed, but their use is limited by the amount of necessary data, which are difficult to obtain for rare variants. The guidelines for variant interpretation of the American College of Medical Genetics and Genomics along with the Association for Molecular Pathology (ACMG/AMP) state that "well-established" functional studies provide strong support of a pathogenic or benign impact (criteria PS3 and BS3, respectively) and can be used as evidence type to reach a final classification. Moreover, the Clinical Genome Resource Sequence Variant Interpretation Working Group developed rule specifications to refine the PS3/BS3 criteria. Recently, Lira PC et al. developed the "Hi Set" approach that generated PS3/BS3 codes for over two-thousands BRCA1 VUS. While highly successful, this approach did not discriminate a group of variants with conflicting evidences. Here, we aimed to implement the outcomes of the "Hi-set" approach applying Green Fluorescent Protein (GFP)-reassembly assays, assessing the effect of variants in the RING and BRCT domains of BRCA1 on the binding of these domains with the UbcH5a or ABRAXAS proteins, respectively. The analyses of 26 clinically classified variants, including 13 tested in our previous study, showed 100% sensitivity and specificity in identifying pathogenic and benign variants for both the RING/UbcH5a and the BRCTs/ABRAXAS interactions. We derived the strength of evidences generated by the GFP-reassembly assays corresponding to moderate for both PS3 and BS3 criteria assessment. The GFP-reassembly assays were applied to the functional characterization of 8 discordant variants from the study by Lyra et al. The outcomes of these analyses, combined with those reported in the "Hi Set" study, allowed the assignment of ACMG/AMP criteria in favor or against pathogenicity for all 8 examined variants. The above findings were validated with a semi-quantitative Mammalian Two-Hybrid approach, and totally concordant results were observed. Our data contributes in shedding light on the functional significance of BRCA1 VUS and on their clinical interpretation within the ACMG/AMP framework.
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Brnich SE, Arteaga EC, Wang Y, Tan X, Berg JS. A Validated Functional Analysis of Partner and Localizer of BRCA2 Missense Variants for Use in Clinical Variant Interpretation. J Mol Diagn 2021; 23:847-864. [PMID: 33964450 PMCID: PMC8491091 DOI: 10.1016/j.jmoldx.2021.04.010] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2021] [Accepted: 04/06/2021] [Indexed: 12/29/2022] Open
Abstract
Clinical genetic testing readily detects germline genetic variants. Yet, the rarity of individual variants limits the evidence available for variant classification, leading to many variants of uncertain significance (VUS). VUS cannot guide clinical decisions, complicating counseling and management. In hereditary breast cancer gene PALB2, approximately 50% of clinically identified germline variants are VUS and approximately 90% of VUS are missense. Truncating PALB2 variants have homologous recombination (HR) defects and rely on error-prone nonhomologous end-joining for DNA damage repair (DDR). Recent reports show that some missense PALB2 variants may also be damaging, but most functional studies have lacked benchmarking controls required for sufficient predictive power for clinical use. Here, variant-level DDR capacity in hereditary breast cancer genes was assessed using the Traffic Light Reporter (TLR) to quantify cellular HR/nonhomologous end-joining with fluorescent markers. First, using BRCA2 missense variants of known significance as benchmarks, the TLR distinguished between normal/abnormal HR function. The TLR was then validated for PALB2 and used to test 37 PALB2 variants. Based on the TLR's ability to correctly classify PALB2 validation controls, these functional data where applied in subsequent germline variant interpretations at a moderate level of evidence toward a pathogenic interpretation (PS3_moderate) for 8 variants with abnormal DDR, or a supporting level of evidence toward a benign interpretation (BS3_supporting) for 13 variants with normal DDR.
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Affiliation(s)
- Sarah E Brnich
- Department of Genetics, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina; Curriculum in Genetics and Molecular Biology, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina
| | - Eyla Cristina Arteaga
- Department of Genetics, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina
| | - Yueting Wang
- Department of Biostatistics, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina
| | - Xianming Tan
- Department of Biostatistics, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina; Lineberger Comprehensive Cancer Center, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina
| | - Jonathan S Berg
- Department of Genetics, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina.
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4
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Toh MR, Low CE, Chong ST, Chan SH, Ishak NDB, Courtney E, Kolinjivadi AM, Rodrigue A, Masson JY, Ngeow J. Missense PALB2 germline variant disrupts nuclear localization of PALB2 in a patient with breast cancer. Fam Cancer 2021; 19:123-131. [PMID: 32048105 DOI: 10.1007/s10689-020-00163-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
The PALB2 protein is essential to RAD51-mediated homologous recombination (HR) repair. Germline monoallelic PALB2 pathogenic variants confer significant risks for breast cancer. However, the majority of PALB2 variants remain classified as variants of unknown significance (VUS). We aim to functionally and mechanistically evaluate three novel PALB2 VUS. Patient-derived lymphoblastoid cell lines containing the VUS were analyzed for nuclear localization and foci formation of RAD51 as a measure of HR efficiency. To understand the mechanism underlying the HR deficiency, PALB2 nuclear localization was assessed using immunofluorescence studies. Among these VUS, c.3251C>T (p.Ser1084Leu) occurred in a patient with metastatic breast cancer while c.1054G>C (p.Glu352Gln) and c.1057A>G (p.Lys353Glu) were seen in patients with squamous cell carcinoma of skin and renal cell carcinoma respectively. Variant c.3251C>T was located within the WD40 domain which normally masked the nuclear export signal sequence responsible for nuclear delocalization of PALB2. Correspondingly, c.3251C>T displayed aberrant cytoplasmic localization of PALB2 which led to an impaired RAD51 nuclear localization and foci formation. On the other hand, both c.1054G>C and c.1057A>G showed intact HR functions and nuclear localization of PALB2, consistent with their locations within domains of no known function. Additionally, the prevalence of c.1054G>C was similar among healthy controls and patients with breast cancer (as seen in other studies), suggestive of its non-pathogenicity. In conclusion, our studies provided the functional evidence showing the deleterious effect of c.3251C>T, and non-deleterious effects of c.1054G>C and c.1057A>G. Using the ClinGen Pathogenicity calculator, c.3251C>T remains a VUS while c.1054G>C and c.1057A>G may be classified as likely benign variants.
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Affiliation(s)
- Ming Ren Toh
- Duke-NUS Medical School, Singapore, 169857, Singapore
| | - Chen Ee Low
- Cancer Genetics Service, Division of Medical Oncology, National Cancer Center, Singapore, 169610, Singapore
| | - Siao Ting Chong
- Cancer Genetics Service, Division of Medical Oncology, National Cancer Center, Singapore, 169610, Singapore
| | - Sock Hoai Chan
- Cancer Genetics Service, Division of Medical Oncology, National Cancer Center, Singapore, 169610, Singapore
| | - Nur Diana Binte Ishak
- Cancer Genetics Service, Division of Medical Oncology, National Cancer Center, Singapore, 169610, Singapore
| | - Eliza Courtney
- Cancer Genetics Service, Division of Medical Oncology, National Cancer Center, Singapore, 169610, Singapore
| | - Arun Mouli Kolinjivadi
- Cancer Genetics Service, Division of Medical Oncology, National Cancer Center, Singapore, 169610, Singapore.,Lee Kong Chian School of Medicine, Nanyang Technological University, Singapore, 639798, Singapore
| | - Amélie Rodrigue
- CHU de Québec Research Center, Oncology Division, HDQ Pavilion, 9 McMahon, Québec City, QC, G1R 3S3, Canada.,Department of Molecular Biology, Medical Biochemistry and Pathology, Laval University Cancer Research Center, Québec City, QC, G1V 0A6, Canada
| | - Jean-Yves Masson
- CHU de Québec Research Center, Oncology Division, HDQ Pavilion, 9 McMahon, Québec City, QC, G1R 3S3, Canada.,Department of Molecular Biology, Medical Biochemistry and Pathology, Laval University Cancer Research Center, Québec City, QC, G1V 0A6, Canada
| | - Joanne Ngeow
- Duke-NUS Medical School, Singapore, 169857, Singapore. .,Cancer Genetics Service, Division of Medical Oncology, National Cancer Center, Singapore, 169610, Singapore. .,Lee Kong Chian School of Medicine, Nanyang Technological University, Singapore, 639798, Singapore. .,Institute of Molecular and Cellular Biology, Agency for Science, Technology and Research, Singapore, 138673, Singapore.
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El Ansari FZ, Jouali F, Marchoudi N, Bennani MM, Ghailani NN, Barakat A, Fekkak J. Screening of BRCA1/2 genes mutations and copy number variations in patients with high risk for hereditary breast and ovarian cancer syndrome (HBOC). BMC Cancer 2020; 20:747. [PMID: 32778078 PMCID: PMC7418307 DOI: 10.1186/s12885-020-07250-0] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2020] [Accepted: 08/03/2020] [Indexed: 12/12/2022] Open
Abstract
Background Hereditary breast and ovarian cancer (HBOC) is an autosomal dominant inherited cancer susceptibility disorder. Both BRCA1 and BRCA2 genes are considered as high penetrance genes of this syndrome. The identification of BRCA1/2 genetic alterations before cancer development, grant patients the chance to benefit from various medical cancer prevention approaches. Therefore, the appearance of recent advanced technologies in molecular analysis such as next generation sequencing has simplified full BRCA1/2 analysis. Many attempts took place in hope of understanding the molecular germline spectrum of these two genes in Moroccan HBOC patients. However, most of the past projects focused only on young breast cancer cases, lacked ovarian cancer cases in their cohort and only a limited number of these studies were able to analyze the entire exons or copy number variations for both genes. In attempt of gaining more information regarding the molecular profile of BRCA1/2 in HBOC, we conducted a study in which we analyze their molecular profile on selected Moroccan patients suspected of having HBOC syndrome. Methods In this study we obtained blood samples from 64 selected Moroccan patients, who suffered from Breast and/or ovarian cancer and had a strong family history for cancer. To analyze BRCA1/2 punctual variants and copy number variations, we used the Ion Personal Genome Machine (PGM) and Oncomine BRCA1/2 research assay panel. Afterward, we correlated the molecular results with the clinic-pathologic data using IBM SPSS Statistics ver 2. Results From the 64 selected cases, Forty-six had breast cancer, fifteen had ovarian cancer and three had both breast and ovarian cancer. The molecular analysis revealed that 18 patients from the 64 harbored a pathogenic variant (28%). Twelve had six different BRCA1 pathogenic variants and six had six different BRCA2 pathogenic variants. In this study, we report four pathogenic variants that to the best of our knowledge has never been reported in the Moroccan population before. Regarding copy number variation analysis, No CNV was detected in both genes for all the 64 successfully sequenced and analyzed patients in our cohort. Conclusion Work like the present has an important implication on public health and science. It is critical that molecular profiling studies are performed on underserved and understudied population like Morocco.
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Affiliation(s)
- Fatima Zahra El Ansari
- Biomedical Genomics and Oncogenetics Research Laboratory, Faculty of Sciences and Techniques of Tangier, University Abdelmalek Essaâdi, 90000, Tangier, Morocco. .,Molecular Biology Department, ANOUAL Laboratory, Casablanca, Morocco.
| | - Farah Jouali
- Molecular Biology Department, ANOUAL Laboratory, Casablanca, Morocco
| | - Nabila Marchoudi
- Molecular Biology Department, ANOUAL Laboratory, Casablanca, Morocco
| | - Mohcine Mechita Bennani
- Biomedical Genomics and Oncogenetics Research Laboratory, Faculty of Sciences and Techniques of Tangier, University Abdelmalek Essaâdi, 90000, Tangier, Morocco
| | - Naima Nourouti Ghailani
- Biomedical Genomics and Oncogenetics Research Laboratory, Faculty of Sciences and Techniques of Tangier, University Abdelmalek Essaâdi, 90000, Tangier, Morocco
| | - Amina Barakat
- Biomedical Genomics and Oncogenetics Research Laboratory, Faculty of Sciences and Techniques of Tangier, University Abdelmalek Essaâdi, 90000, Tangier, Morocco
| | - Jamal Fekkak
- Molecular Biology Department, ANOUAL Laboratory, Casablanca, Morocco
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Rodrigue A, Margaillan G, Torres Gomes T, Coulombe Y, Montalban G, da Costa E Silva Carvalho S, Milano L, Ducy M, De-Gregoriis G, Dellaire G, Araújo da Silva W, Monteiro AN, Carvalho MA, Simard J, Masson JY. A global functional analysis of missense mutations reveals two major hotspots in the PALB2 tumor suppressor. Nucleic Acids Res 2020; 47:10662-10677. [PMID: 31586400 PMCID: PMC6847799 DOI: 10.1093/nar/gkz780] [Citation(s) in RCA: 32] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2019] [Revised: 08/12/2019] [Accepted: 09/24/2019] [Indexed: 01/01/2023] Open
Abstract
While biallelic mutations in the PALB2 tumor suppressor cause Fanconi anemia subtype FA-N, monoallelic mutations predispose to breast and familial pancreatic cancer. Although hundreds of missense variants in PALB2 have been identified in patients to date, only a few have clear functional and clinical relevance. Herein, we investigate the effects of 44 PALB2 variants of uncertain significance found in breast cancer patients and provide detailed analysis by systematic functional assays. Our comprehensive functional analysis reveals two hotspots for potentially deleterious variations within PALB2, one at each terminus. PALB2 N-terminus variants p.P8L [c.23C>T], p.Y28C [c.83A>G], and p.R37H [c.110G>A] compromised PALB2-mediated homologous recombination. At the C-terminus, PALB2 variants p.L947F [c.2841G>T], p.L947S [c.2840T>C], and most strikingly p.T1030I [c.3089C>T] and p.W1140G [c.3418T>C], stood out with pronounced PARP inhibitor sensitivity and cytoplasmic accumulation in addition to marked defects in recruitment to DNA damage sites, interaction with BRCA2 and homologous recombination. Altogether, our findings show that a combination of functional assays is necessary to assess the impact of germline missense variants on PALB2 function, in order to guide proper classification of their deleteriousness.
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Affiliation(s)
- Amélie Rodrigue
- CHU de Québec-Université Laval, Oncology Division, 9 McMahon, Québec City, QC G1R 3S3, Canada.,Department of Molecular Biology, Medical Biochemistry and Pathology; Laval University Cancer Research Center, Québec City, QC G1V 0A6, Canada
| | - Guillaume Margaillan
- CHU de Québec-Université Laval Research Center, Genomics Center, Québec City, QC, Canada
| | - Thiago Torres Gomes
- Instituto Nacional de Câncer, Centro de Pesquisa, Programa de Pesquisa Clínica, Rio de Janeiro, Brazil.,Instituto Federal do Rio de Janeiro, Laboratório de Genética Molecular, Maracanã, Rio de Janeiro, Brazil
| | - Yan Coulombe
- CHU de Québec-Université Laval, Oncology Division, 9 McMahon, Québec City, QC G1R 3S3, Canada.,Department of Molecular Biology, Medical Biochemistry and Pathology; Laval University Cancer Research Center, Québec City, QC G1V 0A6, Canada
| | - Gemma Montalban
- CHU de Québec-Université Laval, Oncology Division, 9 McMahon, Québec City, QC G1R 3S3, Canada.,Department of Molecular Biology, Medical Biochemistry and Pathology; Laval University Cancer Research Center, Québec City, QC G1V 0A6, Canada.,CHU de Québec-Université Laval Research Center, Genomics Center, Québec City, QC, Canada
| | - Simone da Costa E Silva Carvalho
- CHU de Québec-Université Laval, Oncology Division, 9 McMahon, Québec City, QC G1R 3S3, Canada.,Instituto Nacional de Câncer, Centro de Pesquisa, Programa de Pesquisa Clínica, Rio de Janeiro, Brazil.,Department of Genetics at Ribeirão Preto Medical School, University of São Paulo; Center for Cell-Based Therapy (CEPID/FAPESP); National Institute of Science and Technology in Stem Cell and Cell Therapy (INCTC/CNPq), Ribeirão Preto, SP, Brazil
| | - Larissa Milano
- CHU de Québec-Université Laval, Oncology Division, 9 McMahon, Québec City, QC G1R 3S3, Canada.,Department of Molecular Biology, Medical Biochemistry and Pathology; Laval University Cancer Research Center, Québec City, QC G1V 0A6, Canada
| | - Mandy Ducy
- CHU de Québec-Université Laval, Oncology Division, 9 McMahon, Québec City, QC G1R 3S3, Canada.,Department of Molecular Biology, Medical Biochemistry and Pathology; Laval University Cancer Research Center, Québec City, QC G1V 0A6, Canada.,CHU de Québec-Université Laval Research Center, Genomics Center, Québec City, QC, Canada
| | - Giuliana De-Gregoriis
- Instituto Nacional de Câncer, Centro de Pesquisa, Programa de Pesquisa Clínica, Rio de Janeiro, Brazil.,Instituto Federal do Rio de Janeiro, Laboratório de Genética Molecular, Maracanã, Rio de Janeiro, Brazil
| | - Graham Dellaire
- Department of Pathology, Dalhousie University, Halifax, NS, Canada
| | - Wilson Araújo da Silva
- Department of Genetics at Ribeirão Preto Medical School, University of São Paulo; Center for Cell-Based Therapy (CEPID/FAPESP); National Institute of Science and Technology in Stem Cell and Cell Therapy (INCTC/CNPq), Ribeirão Preto, SP, Brazil
| | | | - Marcelo A Carvalho
- Instituto Nacional de Câncer, Centro de Pesquisa, Programa de Pesquisa Clínica, Rio de Janeiro, Brazil.,Instituto Federal do Rio de Janeiro, Laboratório de Genética Molecular, Maracanã, Rio de Janeiro, Brazil
| | - Jacques Simard
- CHU de Québec-Université Laval Research Center, Genomics Center, Québec City, QC, Canada
| | - Jean-Yves Masson
- CHU de Québec-Université Laval, Oncology Division, 9 McMahon, Québec City, QC G1R 3S3, Canada.,Department of Molecular Biology, Medical Biochemistry and Pathology; Laval University Cancer Research Center, Québec City, QC G1V 0A6, Canada
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7
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Wappenschmidt B, Hauke J, Faust U, Niederacher D, Wiesmüller L, Schmidt G, Groß E, Gehrig A, Sutter C, Ramser J, Rump A, Arnold N, Meindl A. Criteria of the German Consortium for Hereditary Breast and Ovarian Cancer for the Classification of Germline Sequence Variants in Risk Genes for Hereditary Breast and Ovarian Cancer. Geburtshilfe Frauenheilkd 2020; 80:410-429. [PMID: 32322110 PMCID: PMC7174002 DOI: 10.1055/a-1110-0909] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2019] [Revised: 01/28/2020] [Accepted: 01/29/2020] [Indexed: 12/14/2022] Open
Abstract
More than ten years ago, the German Consortium for Hereditary Breast and Ovarian Cancer (GC-HBOC) set up a panel of experts (VUS Task Force) which was tasked with reviewing the classifications of genetic variants reported by individual centres of the GC-HBOC to the central database in Leipzig and reclassifying them, where necessary, based on the most recent data. When it evaluates variants, the VUS Task Force must arrive at a consensus. The resulting classifications are recorded in a central database where they serve as a basis for ensuring the consistent evaluation of previously known and newly identified variants in the different centres of the GC-HBOC. The standardised VUS evaluation by the VUS Task Force is a key element of the recall system which has also been set up by the GC-HBOC. The system will be used to pass on information to families monitored and managed by GC-HBOC centres in the event that previously classified variants are reclassified based on new information. The evaluation algorithm of the VUS Task Force was compiled using internationally established assessment methods (IARC, ACMG, ENIGMA) and is presented here together with the underlying evaluation criteria used to arrive at the classification decision using a flow chart. In addition, the characteristics and special features of specific individual risk genes associated with breast and/or ovarian cancer are discussed in separate subsections. The URLs of relevant databases have also been included together with extensive literature references to provide additional information and cover the scope and dynamism of the current state of knowledge on the evaluation of genetic variants. In future, if criteria are updated based on new information, the update will be published on the website of the GC-HBOC (
https://www.konsortium-familiaerer-brustkrebs.de/
).
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Affiliation(s)
- Barbara Wappenschmidt
- Zentrum familiärer Brust- und Eierstockkrebs, Universitätsklinikum Köln, Köln, Germany
| | - Jan Hauke
- Zentrum familiärer Brust- und Eierstockkrebs, Universitätsklinikum Köln, Köln, Germany
| | - Ulrike Faust
- Institut für Medizinische Genetik und Angewandte Genomik, Universität Tübingen, Tübingen, Germany
| | - Dieter Niederacher
- Klinik für Frauenheilkunde und Geburtshilfe, Universitätsklinikum Düsseldorf, Düsseldorf, Germany
| | - Lisa Wiesmüller
- Frauenklinik, Sektion Gynäkologische Onkologie, Uniklinik Ulm, Ulm, Germany
| | - Gunnar Schmidt
- Institut für Humangenetik, Medizinische Hochschule Hannover, Hannover, Germany
| | - Evi Groß
- Klinik und Poliklinik für Frauenheilkunde und Geburtshilfe, Klinikum der Universität München, Campus Großhadern, München, Germany
| | - Andrea Gehrig
- Institut für Humangenetik, Universität Würzburg, Würzburg, Germany
| | - Christian Sutter
- Institut für Humangenetik, Universität Heidelberg, Heidelberg, Germany
| | - Juliane Ramser
- Frauenklinik der Technischen Universität München, Klinikum rechts der Isar, München, Germany
| | - Andreas Rump
- Institut für klinische Genetik, Technische Universität Dresden, Dresden, Germany
| | - Norbert Arnold
- Universitätsklinikum Kiel, Klinik für Gynäkologie und Geburtshilfe, Kiel, Germany.,Institut für Klinische Molekularbiologie, Universitätsklinikum Kiel, Kiel, Germany
| | - Alfons Meindl
- Klinik und Poliklinik für Frauenheilkunde und Geburtshilfe, Klinikum der Universität München, Campus Großhadern, München, Germany.,Frauenklinik der Technischen Universität München, Klinikum rechts der Isar, München, Germany
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8
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Monteiro AN, Bouwman P, Kousholt AN, Eccles DM, Millot GA, Masson JY, Schmidt MK, Sharan SK, Scully R, Wiesmüller L, Couch F, Vreeswijk MPG. Variants of uncertain clinical significance in hereditary breast and ovarian cancer genes: best practices in functional analysis for clinical annotation. J Med Genet 2020; 57:509-518. [PMID: 32152249 DOI: 10.1136/jmedgenet-2019-106368] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2019] [Revised: 10/28/2019] [Accepted: 12/01/2019] [Indexed: 12/16/2022]
Affiliation(s)
- Alvaro N Monteiro
- Cancer Epidemiology, H. Lee Moffitt Cancer Center and Research Institute, Tampa, Florida, USA
| | - Peter Bouwman
- Division of Molecular Pathology, Oncode Institute, The Netherlands Cancer Institute, Amsterdam, The Netherlands
| | - Arne N Kousholt
- Division of Molecular Pathology, Oncode Institute, The Netherlands Cancer Institute, Amsterdam, The Netherlands
| | - Diana M Eccles
- Cancer Sciences, University of Southampton Faculty of Medicine, Southampton, UK
| | - Gael A Millot
- Hub-DBC, Institut Pasteur, USR 3756 CNRS, Paris, France
| | - Jean-Yves Masson
- CHU de Québec-Université Laval, Oncology Division, Laval University Cancer Research Center, Quebec City, Quebec, Canada
| | - Marjanka K Schmidt
- Division of Molecular Pathology, Oncode Institute, The Netherlands Cancer Institute, Amsterdam, The Netherlands
| | - Shyam K Sharan
- National Cancer Institute at Frederick, Frederick, Maryland, USA
| | - Ralph Scully
- Beth Israel Deaconess Medical Center, Boston, Massachusetts, USA
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9
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Wu S, Zhou J, Zhang K, Chen H, Luo M, Lu Y, Sun Y, Chen Y. Molecular Mechanisms of PALB2 Function and Its Role in Breast Cancer Management. Front Oncol 2020; 10:301. [PMID: 32185139 PMCID: PMC7059202 DOI: 10.3389/fonc.2020.00301] [Citation(s) in RCA: 33] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2019] [Accepted: 02/20/2020] [Indexed: 12/31/2022] Open
Abstract
Partner and localizer of BRCA2 (PALB2) is vital for homologous recombination (HR) repair in response to DNA double-strand breaks (DSBs). PALB2 functions as a tumor suppressor and participates in the maintenance of genome integrity. In this review, we summarize the current knowledge of the biological roles of the multifaceted PALB2 protein and of its regulation. Moreover, we describe the link between PALB2 pathogenic variants (PVs) and breast cancer predisposition, aggressive clinicopathological features, and adverse clinical prognosis. We also refer to both the opportunities and challenges that the identification of PALB2 PVs provides in breast cancer genetic counseling and precision medicine.
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Affiliation(s)
- Shijie Wu
- Department of Breast Surgery, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China.,The Key Laboratory of Cancer Prevention and Intervention, China National Ministry of Education, Zhejiang University School of Medicine, Hangzhou, China
| | - Jiaojiao Zhou
- Department of Breast Surgery, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China.,The Key Laboratory of Cancer Prevention and Intervention, China National Ministry of Education, Zhejiang University School of Medicine, Hangzhou, China
| | - Kun Zhang
- Department of Breast Surgery, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China.,The Key Laboratory of Cancer Prevention and Intervention, China National Ministry of Education, Zhejiang University School of Medicine, Hangzhou, China
| | - Huihui Chen
- Department of Breast Surgery, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China.,The Key Laboratory of Cancer Prevention and Intervention, China National Ministry of Education, Zhejiang University School of Medicine, Hangzhou, China
| | - Meng Luo
- Department of Breast Surgery, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China.,The Key Laboratory of Cancer Prevention and Intervention, China National Ministry of Education, Zhejiang University School of Medicine, Hangzhou, China
| | - Yuexin Lu
- Department of Breast Surgery, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China.,The Key Laboratory of Cancer Prevention and Intervention, China National Ministry of Education, Zhejiang University School of Medicine, Hangzhou, China
| | - Yuting Sun
- Department of Breast Surgery, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China.,The Key Laboratory of Cancer Prevention and Intervention, China National Ministry of Education, Zhejiang University School of Medicine, Hangzhou, China
| | - Yiding Chen
- Department of Breast Surgery, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China.,The Key Laboratory of Cancer Prevention and Intervention, China National Ministry of Education, Zhejiang University School of Medicine, Hangzhou, China
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