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Lebedeva A, Veselovsky E, Kavun A, Belova E, Grigoreva T, Orlov P, Subbotovskaya A, Shipunov M, Mashkov O, Bilalov F, Shatalov P, Kaprin A, Shegai P, Diuzhev Z, Migiaev O, Vytnova N, Mileyko V, Ivanov M. Untapped Potential of Poly(ADP-Ribose) Polymerase Inhibitors: Lessons Learned From the Real-World Clinical Homologous Recombination Repair Mutation Testing. World J Oncol 2024; 15:562-578. [PMID: 38993246 PMCID: PMC11236374 DOI: 10.14740/wjon1820] [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: 01/17/2024] [Accepted: 04/29/2024] [Indexed: 07/13/2024] Open
Abstract
Background Testing for homologous recombination deficiency (HRD) mutations is pivotal to assess individual risk, to proact preventive measures in healthy carriers and to tailor treatments for cancer patients. Increasing prominence of poly(ADP-ribose) polymerase (PARP) inhibitors with remarkable impact on molecular-selected patient survival across diverse nosologies, ingrains testing for BRCA genes and beyond in clinical practice. Nevertheless, testing strategies remain a question of debate. While several pathogenic BRCA1/2 gene variants have been described as founder pathogenic mutations frequently found in patients from Russia, other homologous recombination repair (HRR) genes have not been sufficiently explored. In this study, we present real-world data of routine HRR gene testing in Russia. Methods We evaluated clinical and sequencing data from cancer patients who had germline/somatic next-generation sequencing (NGS) HRR gene testing in Russia (BRCA1/2/ATM/CHEK2, or 15 HRR genes). The primary objectives of this study were to evaluate the frequency of BRCA1/2 and non-BRCA gene mutations in real-world unselected patients from Russia, and to determine whether testing beyond BRCA1/2 is feasible. Results Data of 2,032 patients were collected from February 2021 to February 2023. Most had breast (n = 715, 35.2%), ovarian (n = 259, 12.7%), pancreatic (n = 85, 4.2%), or prostate cancer (n = 58, 2.9%). We observed 586 variants of uncertain significance (VUS) and 372 deleterious variants (DVs) across 487 patients, with 17.6% HRR-mutation positivity. HRR testing identified 120 (11.8%) BRCA1/2-positive, and 172 (16.9%) HRR-positive patients. With 51 DVs identified in 242 formalin-fixed paraffin-embedded (FFPE), testing for variant origin clarification was required in one case (0.4%). Most BRCA1/2 germline variants were DV (121 DVs, 26 VUS); in non-BRCA1/2 genes, VUS were ubiquitous (53 DVs, 132 VUS). In silico prediction identified additional 4.9% HRR and 1.2% BRCA1/2/ATM/CHEK2 mutation patients. Conclusions Our study represents one of the first reports about the incidence of DV and VUS in HRR genes, including genes beyond BRCA1/2, identified in cancer patients from Russia, assessed by NGS. In silico predictions of the observed HRR gene variants suggest that non-BRCA gene testing is likely to result in higher frequency of patients who are candidates for PARP inhibitor therapy. Continuing sequencing efforts should clarify interpretation of frequently observed non-BRCA VUS.
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Affiliation(s)
- Alexandra Lebedeva
- OncoAtlas LLC, Moscow, Russia
- Sechenov First Moscow State Medical University, Moscow, Russia
| | - Egor Veselovsky
- OncoAtlas LLC, Moscow, Russia
- Department of Evolutionary Genetics of Development, Koltzov Institute of Developmental Biology of the Russian Academy of Sciences, Moscow, Russia
| | | | - Ekaterina Belova
- OncoAtlas LLC, Moscow, Russia
- Sechenov First Moscow State Medical University, Moscow, Russia
- Lomonosov Moscow State University, Moscow, Russia
| | - Tatiana Grigoreva
- OncoAtlas LLC, Moscow, Russia
- Sechenov First Moscow State Medical University, Moscow, Russia
- Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, Moscow, Russia
| | - Pavel Orlov
- The Federal Research Center for Fundamental and Translational Medicine (NIIECM FRC FTM), Novosibirsk, Russia
| | - Anna Subbotovskaya
- The Federal Research Center for Fundamental and Translational Medicine (NIIECM FRC FTM), Novosibirsk, Russia
| | - Maksim Shipunov
- The Federal Research Center for Fundamental and Translational Medicine (NIIECM FRC FTM), Novosibirsk, Russia
| | - Oleg Mashkov
- State Budgetary Institution of Healthcare Republican Medical Genetic Center, Ufa, Russia
| | - Fanil Bilalov
- State Budgetary Institution of Healthcare Republican Medical Genetic Center, Ufa, Russia
| | - Peter Shatalov
- National Medical Research Radiological Centre of the Ministry of Health of the Russian Federation, Obninsk, Russia
| | - Andrey Kaprin
- National Medical Research Radiological Centre of the Ministry of Health of the Russian Federation, Obninsk, Russia
| | - Peter Shegai
- National Medical Research Radiological Centre of the Ministry of Health of the Russian Federation, Obninsk, Russia
| | | | | | | | - Vladislav Mileyko
- OncoAtlas LLC, Moscow, Russia
- Sechenov First Moscow State Medical University, Moscow, Russia
| | - Maxim Ivanov
- OncoAtlas LLC, Moscow, Russia
- Sechenov First Moscow State Medical University, Moscow, Russia
- Moscow Institute of Physics and Technology, Dolgoprudny, Moscow Region, Russia
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Fieuws C, Van der Meulen J, Proesmans K, De Jaeghere EA, Loontiens S, Van Dorpe J, Tummers P, Denys H, Van de Vijver K, Claes KBM. Identification of potentially actionable genetic variants in epithelial ovarian cancer: a retrospective cohort study. NPJ Precis Oncol 2024; 8:71. [PMID: 38519644 PMCID: PMC10959961 DOI: 10.1038/s41698-024-00565-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2023] [Accepted: 03/08/2024] [Indexed: 03/25/2024] Open
Abstract
Ovarian cancer is the most lethal gynecologic malignancy, mainly due to late-stage diagnosis, frequent recurrences, and eventually therapy resistance. To identify potentially actionable genetic variants, sequencing data of 351 Belgian ovarian cancer patients were retrospectively captured from electronic health records. The cohort included 286 (81%) patients with high-grade serous ovarian cancer, 17 (5%) with low-grade serous ovarian cancer, and 48 (14%) with other histotypes. Firstly, an overview of the prevalence and spectrum of the BRCA1/2 variants highlighted germline variants in 4% (11/250) and somatic variants in 11% (37/348) of patients. Secondly, application of a multi-gene panel in 168 tumors revealed a total of 214 variants in 28 genes beyond BRCA1/2 with a median of 1 (IQR, 1-2) genetic variant per patient. The ten most often altered genes were (in descending order): TP53, BRCA1, PIK3CA, BRCA2, KRAS, ERBB2 (HER2), TERT promotor, RB1, PIK3R1 and PTEN. Of note, the genetic landscape vastly differed between the studied histotypes. Finally, using ESCAT the clinical evidence of utility for every genetic variant was scored. Only BRCA1/2 pathogenic variants were classified as tier-I. Nearly all patients (151/168; 90%) had an ESCAT tier-II variant, most frequently in TP53 (74%), PIK3CA (9%) and KRAS (7%). In conclusion, our findings imply that although only a small proportion of genetic variants currently have direct impact on ovarian cancer treatment decisions, other variants could help to identify novel (personalized) treatment options to address the poor prognosis of ovarian cancer, particularly in rare histotypes.
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Affiliation(s)
- Charlotte Fieuws
- Department of Biomolecular Medicine, Ghent University, Ghent, Belgium
- Center for Medical Genetics Ghent, Ghent University Hospital, Ghent, Belgium
- Cancer Research Institute Ghent, Ghent, Belgium
| | - Joni Van der Meulen
- Department of Biomolecular Medicine, Ghent University, Ghent, Belgium
- Center for Medical Genetics Ghent, Ghent University Hospital, Ghent, Belgium
- Cancer Research Institute Ghent, Ghent, Belgium
| | | | - Emiel A De Jaeghere
- Cancer Research Institute Ghent, Ghent, Belgium
- Department of Medical Oncology, Ghent University Hospital, Ghent, Belgium
| | - Siebe Loontiens
- Department of Biomolecular Medicine, Ghent University, Ghent, Belgium
- Center for Medical Genetics Ghent, Ghent University Hospital, Ghent, Belgium
- Cancer Research Institute Ghent, Ghent, Belgium
| | - Jo Van Dorpe
- Cancer Research Institute Ghent, Ghent, Belgium
- Department of Medical Oncology, Ghent University Hospital, Ghent, Belgium
| | - Philippe Tummers
- Department of Medical Oncology, Ghent University Hospital, Ghent, Belgium
| | - Hannelore Denys
- Cancer Research Institute Ghent, Ghent, Belgium
- Department of Medical Oncology, Ghent University Hospital, Ghent, Belgium
| | - Koen Van de Vijver
- Cancer Research Institute Ghent, Ghent, Belgium
- Department of Pathology, Ghent University Hospital, Ghent, Belgium
| | - Kathleen B M Claes
- Department of Biomolecular Medicine, Ghent University, Ghent, Belgium.
- Center for Medical Genetics Ghent, Ghent University Hospital, Ghent, Belgium.
- Cancer Research Institute Ghent, Ghent, Belgium.
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de Freitas Ribeiro AA, Junior NMC, Dos Santos LL. Systematic review of the molecular basis of hereditary breast and ovarian cancer syndrome in Brazil: the current scenario. Eur J Med Res 2024; 29:187. [PMID: 38504328 PMCID: PMC10953197 DOI: 10.1186/s40001-024-01767-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2022] [Accepted: 03/04/2024] [Indexed: 03/21/2024] Open
Abstract
BACKGROUND A detailed understanding of the genetic basis of cancer is of great interest to public health monitoring programs. Although many studies have been conducted in Brazil, a global view on the molecular profile related to hereditary breast and ovarian cancer (HBOC) in this large and heterogeneous population is lacking. METHODS A systematic review following the PRISMA guidelines was conducted in three electronic databases (PubMed, BIREME and SciELO). Brazilian studies covering molecular analysis of genes related to HBOC, published until December 2023, were considered. RESULTS We identified 35 original studies that met all the inclusion criteria. A total of 137 distinct mutations were found in the BRCA1 gene, but four of them corresponded to 44.5% of all mutations found in this gene. The c.5266dupC BRCA1 mutation was responsible for 26.8% of all pathogenic mutations found in the BRCA1 gene in patients with clinical criteria for HBOC from the Brazilian population. Considering all studies that track this mutation in the BRCA1 gene, we found a frequency of 2% (120/6008) for this mutation in Brazilian patients. In the BRCA2 gene, the four most frequent mutations corresponded to 29.2% of pathogenic mutations. Even though it was tracked by few studies, the c.156_157insAlu mutation was responsible for 9.6% of all pathogenic mutations reported in the BRCA2 gene. Seventeen studies found pathogenic mutations in other non-BRCA genes, the c.1010G > A mutation in the TP53 gene being the most frequent one. Considering all studies that screened for this specific mutation in patients with the clinical criteria for HBOC, the frequency of c.1010G > A was estimated at 1.83% (61/3336). CONCLUSIONS Despite significant molecular heterogeneity among mutations in HBOC patients from Brazil, three mutations deserve to be highlighted, c.5266dupC, c.156_157insAlu and c.1010G > A in the BRCA1, BRCA2 and TP53 genes, respectively. With more than 200 records, these three mutations play a vital role in the pathology of breast and ovarian cancer in Brazil. The data collected shed light on the subject, but there is still not enough data from certain subpopulations.
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Affiliation(s)
| | | | - Luciana Lara Dos Santos
- Universidade Federal de São João del Rei (UFSJ), 400 Sebastião Gonçalves Coelho St, Divinópolis, MG, 35501-296, Brazil.
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Pikala M, Burzyńska M. Trends in Mortality Due to Malignant Neoplasms of Female Genital Organs in Poland in the Period 2000-2021-A Population-Based Study. Cancers (Basel) 2024; 16:1038. [PMID: 38473394 PMCID: PMC11154286 DOI: 10.3390/cancers16051038] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2024] [Revised: 02/29/2024] [Accepted: 03/01/2024] [Indexed: 03/14/2024] Open
Abstract
The aim of this study is to assess mortality trends due to malignant neoplasms of female genital organs (MNFGOs) in Poland between 2000 and 2021. For the purpose of the study, the authors used data on all deaths of Polish female inhabitants due to MNFGO between 2000 and 2021, obtained from the Statistics Poland database. The standardised death rates (SDR), potential years of life lost (PYLL), annual percentage change (APC) and average annual percentage change (AAPC) were calculated. Between the years 2000 and 2021, 138,000 women died due to MNFGOs in Poland. Of this number, 54,975 (39.8%) deaths were caused by ovarian cancer, 37,487 (27.2%) by cervix uteri cancer, and 26,231 (19.0%) by corpus uteri cancer. A decrease in mortality due to cervix uteri cancer (APC = -2.4%, p < 0.05) was the most favourable change that occurred in the period 2000-2021, while the least favourable change was an increase in mortality due to corpus uteri cancer for the period 2005-2019 (APC = 5.0%, p < 0.05). SDRs due to ovarian cancer showed a decreasing trend between 2007 and 2021 (APC = -0.5%, p < 0.05). The standardised PYLL index due to cervical cancer was 167.7 per 100,000 women in 2000 and decreased to 75.0 in 2021 (AAPC = -3.7, p < 0.05). The number of lost years of life due to ovarian cancer decreased from 143.8 in 2000 to 109.5 in 2021 (AAPC = -1.3, p < 0.05). High values of death rates due to MNFGO in Poland, compared to other European countries, show that there is a need to promote preventive programmes and continue to monitor changes in mortality.
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Affiliation(s)
- Małgorzata Pikala
- Department of Epidemiology and Biostatistics, The Chair of Social and Preventive Medicine of the Medical University of Lodz, 90-752 Lodz, Poland;
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Tuncer SB, Celik B, Erciyas SK, Erdogan OS, Gültaslar BK, Odemis DA, Avsar M, Sen F, Saip PM, Yazici H. Germline mutational variants of Turkish ovarian cancer patients suspected of Hereditary Breast and Ovarian Cancer (HBOC) by next-generation sequencing. Pathol Res Pract 2024; 254:155075. [PMID: 38219492 DOI: 10.1016/j.prp.2023.155075] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/25/2023] [Revised: 12/11/2023] [Accepted: 12/29/2023] [Indexed: 01/16/2024]
Abstract
Hereditary Breast and Ovarian Cancer (HBOC) syndrome is characterized by an increased risk of developing breast cancer (BC) and ovarian cancer (OC) due to inherited genetic mutations. Understanding the genetic variants associated with HBOC is crucial for identifying individuals at high risk and implementing appropriate preventive measures. The study included 630 Turkish OC patients with confirmed diagnostic criteria of The National Comprehensive Cancer Network (NCCN) concerning HBOC. Genomic DNA was extracted from peripheral blood samples, and targeted Next-generation sequencing (NGS) was performed. Bioinformatics analysis and variant interpretation were conducted to identify pathogenic variants (PVs). Our analysis revealed a spectrum of germline pathogenic variants associated with HBOC in Turkish OC patients. Notably, several pathogenic variants in BRCA1, BRCA2, and other DNA repair genes were identified. Specifically, we observed germline PVs in 130 individuals, accounting for 20.63% of the total cohort. 76 distinct PVs in genes, BRCA1 (40 PVs), BRCA2 (29 PVs), ATM (1 PV), CHEK2 (2 PVs), ERCC2 (1 PV), MUTYH (1 PV), RAD51C (1 PV), and TP53 (1PV) and also, two different PVs (i.e., c.135-2 A>G p.? in BRCA1 and c.6466_6469delTCTC in BRCA2) were detected in a 34-year-old OC patient. In conclusion, our study contributes to a better understanding of the genetic variants underlying HBOC in Turkish OC patients. These findings provide valuable insights into the genetic architecture of HBOC in the Turkish population and shed light on the potential contribution of specific germline PVs to the increased risk of OC.
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Affiliation(s)
- Seref Bugra Tuncer
- Department of Cancer Genetics, Istanbul Faculty of Medicine, Oncology Institute, Istanbul University, Istanbul, Türkiye.
| | - Betul Celik
- Erzincan Binali Yıldırım University, Department of Molecular Biology, Erzincan, Türkiye
| | - Seda Kilic Erciyas
- Department of Cancer Genetics, Istanbul Faculty of Medicine, Oncology Institute, Istanbul University, Istanbul, Türkiye
| | - Ozge Sukruoglu Erdogan
- Department of Cancer Genetics, Istanbul Faculty of Medicine, Oncology Institute, Istanbul University, Istanbul, Türkiye
| | - Busra Kurt Gültaslar
- Department of Cancer Genetics, Istanbul Faculty of Medicine, Oncology Institute, Istanbul University, Istanbul, Türkiye
| | - Demet Akdeniz Odemis
- Department of Cancer Genetics, Istanbul Faculty of Medicine, Oncology Institute, Istanbul University, Istanbul, Türkiye
| | - Mukaddes Avsar
- Health Services Vocational of Higher Education, T.C. Istanbul Aydın University, Istanbul, Türkiye
| | - Fatma Sen
- Clinic of Medical Oncology, Avrasya Hospital, Istanbul, Türkiye
| | - Pınar Mualla Saip
- Department of Medical Oncology, Oncology Institute, Istanbul University, Istanbul, Türkiye
| | - Hulya Yazici
- Istanbul Arel University, Arel Medical Faculty, Department of Medical Biology and Genetics, Istanbul, Türkiye
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Valentini V, Bucalo A, Conti G, Celli L, Porzio V, Capalbo C, Silvestri V, Ottini L. Gender-Specific Genetic Predisposition to Breast Cancer: BRCA Genes and Beyond. Cancers (Basel) 2024; 16:579. [PMID: 38339330 PMCID: PMC10854694 DOI: 10.3390/cancers16030579] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2023] [Revised: 01/24/2024] [Accepted: 01/25/2024] [Indexed: 02/12/2024] Open
Abstract
Among neoplastic diseases, breast cancer (BC) is one of the most influenced by gender. Despite common misconceptions associating BC as a women-only disease, BC can also occur in men. Additionally, transgender individuals may also experience BC. Genetic risk factors play a relevant role in BC predisposition, with important implications in precision prevention and treatment. The genetic architecture of BC susceptibility is similar in women and men, with high-, moderate-, and low-penetrance risk variants; however, some sex-specific features have emerged. Inherited high-penetrance pathogenic variants (PVs) in BRCA1 and BRCA2 genes are the strongest BC genetic risk factor. BRCA1 and BRCA2 PVs are more commonly associated with increased risk of female and male BC, respectively. Notably, BRCA-associated BCs are characterized by sex-specific pathologic features. Recently, next-generation sequencing technologies have helped to provide more insights on the role of moderate-penetrance BC risk variants, particularly in PALB2, CHEK2, and ATM genes, while international collaborative genome-wide association studies have contributed evidence on common low-penetrance BC risk variants, on their combined effect in polygenic models, and on their role as risk modulators in BRCA1/2 PV carriers. Overall, all these studies suggested that the genetic basis of male BC, although similar, may differ from female BC. Evaluating the genetic component of male BC as a distinct entity from female BC is the first step to improve both personalized risk assessment and therapeutic choices of patients of both sexes in order to reach gender equality in BC care. In this review, we summarize the latest research in the field of BC genetic predisposition with a particular focus on similarities and differences in male and female BC, and we also discuss the implications, challenges, and open issues that surround the establishment of a gender-oriented clinical management for BC.
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Affiliation(s)
- Virginia Valentini
- Department of Molecular Medicine, Sapienza University of Rome, 00161 Rome, Italy; (V.V.); (A.B.); (G.C.); (L.C.); (V.P.); (C.C.); (V.S.)
| | - Agostino Bucalo
- Department of Molecular Medicine, Sapienza University of Rome, 00161 Rome, Italy; (V.V.); (A.B.); (G.C.); (L.C.); (V.P.); (C.C.); (V.S.)
| | - Giulia Conti
- Department of Molecular Medicine, Sapienza University of Rome, 00161 Rome, Italy; (V.V.); (A.B.); (G.C.); (L.C.); (V.P.); (C.C.); (V.S.)
| | - Ludovica Celli
- Department of Molecular Medicine, Sapienza University of Rome, 00161 Rome, Italy; (V.V.); (A.B.); (G.C.); (L.C.); (V.P.); (C.C.); (V.S.)
| | - Virginia Porzio
- Department of Molecular Medicine, Sapienza University of Rome, 00161 Rome, Italy; (V.V.); (A.B.); (G.C.); (L.C.); (V.P.); (C.C.); (V.S.)
| | - Carlo Capalbo
- Department of Molecular Medicine, Sapienza University of Rome, 00161 Rome, Italy; (V.V.); (A.B.); (G.C.); (L.C.); (V.P.); (C.C.); (V.S.)
- Medical Oncology Unit, Sant’Andrea University Hospital, 00189 Rome, Italy
| | - Valentina Silvestri
- Department of Molecular Medicine, Sapienza University of Rome, 00161 Rome, Italy; (V.V.); (A.B.); (G.C.); (L.C.); (V.P.); (C.C.); (V.S.)
| | - Laura Ottini
- Department of Molecular Medicine, Sapienza University of Rome, 00161 Rome, Italy; (V.V.); (A.B.); (G.C.); (L.C.); (V.P.); (C.C.); (V.S.)
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Hodan R, Kingham K, Kurian AW. Recurrent BRCA2 exon 3 deletion in Assyrian families. J Med Genet 2024; 61:155-157. [PMID: 37657917 DOI: 10.1136/jmg-2023-109430] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2023] [Accepted: 08/21/2023] [Indexed: 09/03/2023]
Abstract
We identified six patients from five families with a recurrent mutation: NM_000059.3 (BRCA2) exon 3 deletion. All families self-identified as Assyrian. Assyrians are an ethnoreligious population of ancient Mesopotamia, now mostly living in modern day Iraq, Syria, Turkey and Iran. They are historically a socially isolated population with intermarriage within their community, living as a religious and language minority in mostly Muslim countries. The probands of each family presented with a classic BRCA2-associated cancer including early-onset breast cancer, epithelial serous ovarian cancer, male breast cancer and/or high-grade prostate cancer, and family history that was also significant for BRCA2-associated cancer. BRCA2 exon 3 deletion is classified as pathogenic and has been previously described in the literature, but it has not been described as a founder mutation in a particular population. We characterise this recurrent BRCA2 pathogenic variant in five Assyrian families in a single centre cohort.
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Affiliation(s)
- Rachel Hodan
- Cancer Genetics, Stanford Health Care, Stanford, California, USA
- Department of Pediatrics (Genetics), Stanford University School of Medicine, Stanford, California, USA
| | - Kerry Kingham
- Cancer Genetics, Stanford Health Care, Stanford, California, USA
- Department of Pediatrics (Genetics), Stanford University School of Medicine, Stanford, California, USA
| | - Allison W Kurian
- Department of Medicine, Stanford University School of Medicine, Stanford, California, USA
- Department of Epidemiology and Population Health, Stanford University School of Medicine, Stanford, California, USA
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Hughes T, Rose AM. The emergence of Fanconi anaemia type S: a phenotypic spectrum of biallelic BRCA1 mutations. Front Oncol 2023; 13:1278004. [PMID: 38146508 PMCID: PMC10749362 DOI: 10.3389/fonc.2023.1278004] [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: 08/15/2023] [Accepted: 10/23/2023] [Indexed: 12/27/2023] Open
Abstract
BRCA1 is involved in the Fanconi anaemia (FA) pathway, which coordinates repair of DNA interstrand cross-links. FA is a rare genetic disorder characterised by bone marrow failure, cancer predisposition and congenital abnormalities, caused by biallelic mutations affecting proteins in the FA pathway. Germline monoallelic pathogenic BRCA1 mutations are known to be associated with hereditary breast/ovarian cancer, however biallelic mutations of BRCA1 were long predicted to be incompatible with embryonic viability, hence BRCA1 was not considered to be a canonical FA gene. Despite this, several patients with biallelic pathogenic BRCA1 mutations and FA-like phenotypes have been identified - defining a new FA type (FA-S) and designating BRCA1 as an FA gene. This report presents a scoping review of the cases of biallelic BRCA1 mutations identified to date, discusses the functional effects of the mutations identified, and proposes a phenotypic spectrum of BRCA1 mutations based upon available clinical and genetic data. We report that this FA-S cohort phenotype includes short stature, microcephaly, facial dysmorphisms, hypo/hyperpigmented lesions, intellectual disability, chromosomal sensitivity to crosslinking agents and predisposition to breast/ovarian cancer and/or childhood cancers, with some patients exhibiting sensitivity to chemotherapy. Unlike most other types of FA, FA-S patients lack bone marrow failure.
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Affiliation(s)
- Tirion Hughes
- University of Oxford Medical School, Oxford, United Kingdom
| | - Anna M. Rose
- Department of Paediatrics, University of Oxford, Oxford, United Kingdom
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Hansen EB, Karlsson Q, Merson S, Wakerell S, Rageevakumar R, Jensen JB, Borre M, Kote-Jarai Z, Eeles RA, Sørensen KD. Impact of germline DNA repair gene variants on prognosis and treatment of men with advanced prostate cancer. Sci Rep 2023; 13:19135. [PMID: 37932350 PMCID: PMC10628129 DOI: 10.1038/s41598-023-46323-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2023] [Accepted: 10/30/2023] [Indexed: 11/08/2023] Open
Abstract
The clinical importance of germline variants in DNA repair genes (DRGs) is becoming increasingly recognized, but their impact on advanced prostate cancer prognosis remains unclear. A cohort of 221 newly diagnosed metastatic castration-resistant prostate cancer (mCRPC) patients were screened for pathogenic germline variants in 114 DRGs. The primary endpoint was progression-free survival (PFS) on first-line androgen signaling inhibitor (ARSI) treatment for mCRPC. Secondary endpoints were time to mCRPC progression on initial androgen deprivation therapy (ADT) and overall survival (OS). Twenty-seven patients (12.2%) carried a germline DRG variant. DRG carrier status was independently associated with shorter PFS on first-line ARSI [HR 1.72 (1.06-2.81), P = 0.029]. At initiation of ADT, DRG carrier status was independently associated with shorter progression time to mCRPC [HR 1.56, (1.02-2.39), P = 0.04] and shorter OS [HR 1.99, (1.12-3.52), P = 0.02]. Investigating the contributions of individual germline DRG variants on PFS and OS revealed CHEK2 variants to have little effect. Furthermore, prior taxane treatment was associated with worse PFS on first-line ARSI for DRG carriers excluding CHEK2 (P = 0.0001), but not for noncarriers. In conclusion, germline DRG carrier status holds independent prognostic value for predicting advanced prostate cancer patient outcomes and may potentially inform on optimal treatment sequencing already at the hormone-sensitive stage.
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Affiliation(s)
- Emma B Hansen
- Department of Molecular Medicine (MOMA), Aarhus University Hospital, Aarhus, Denmark
- Department of Clinical Medicine, Aarhus University, Aarhus, Denmark
| | - Questa Karlsson
- Division of Genetics & Epidemiology, The Institute of Cancer Research, London, UK
| | - Susan Merson
- Division of Genetics & Epidemiology, The Institute of Cancer Research, London, UK
| | - Sarah Wakerell
- Division of Genetics & Epidemiology, The Institute of Cancer Research, London, UK
| | - Reshma Rageevakumar
- Division of Genetics & Epidemiology, The Institute of Cancer Research, London, UK
| | - Jørgen B Jensen
- Department of Clinical Medicine, Aarhus University, Aarhus, Denmark
- Department of Urology, Regional Hospital of West Jutland, Gødstrup Hospital, Gødstrup, Denmark
| | - Michael Borre
- Department of Urology, Aarhus University Hospital, Aarhus, Denmark
| | - Zsofia Kote-Jarai
- Division of Genetics & Epidemiology, The Institute of Cancer Research, London, UK
| | - Rosalind A Eeles
- Division of Genetics & Epidemiology, The Institute of Cancer Research, London, UK
- Royal Marsden NHS Foundation Trust, London, UK
| | - Karina D Sørensen
- Department of Molecular Medicine (MOMA), Aarhus University Hospital, Aarhus, Denmark.
- Department of Clinical Medicine, Aarhus University, Aarhus, Denmark.
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Zhunussova G, Omarbayeva N, Kaidarova D, Abdikerim S, Mit N, Kisselev I, Yergali K, Zhunussova A, Goncharova T, Abdrakhmanova A, Djansugurova L. Determination of genetic predisposition to early breast cancer in women of Kazakh ethnicity. Oncotarget 2023; 14:860-877. [PMID: 37791908 PMCID: PMC10549772 DOI: 10.18632/oncotarget.28518] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2023] [Accepted: 09/21/2023] [Indexed: 10/05/2023] Open
Abstract
Breast cancer (BC) is the most common type of cancer among women in Kazakhstan. To date, little data are available on the spectrum of genetic variation in Kazakh women with BC. We aimed to identify population-specific genetic markers associated with the risk of developing early-onset BC and test their association with clinical and prognostic factors. The study included 224 Kazakh women diagnosed with BC (≤40 age). Entire coding regions (>1700 exons) and the flanking noncoding regions of 94 cancer-associated genes were sequenced from blood DNA using MiSeq platform. We identified 38 unique pathogenic variants (PVs) in 13 different cancer-predisposing genes among 57 patients (25.4%), of which 6 variants were novel. In total, 12 of the 38 distinct PVs were detected recurrently, including BRCA1 c.5266dup, c.5278-2del, and c.2T>C, and BRCA2 c.9409dup and c.9253del that may be founder in this population. BRCA1 carriers were significantly more likely to develop triple-negative BC (OR = 6.61, 95% CI 2.44-17.91, p = 0.0002) and have family history of BC (OR = 3.17, 95% CI 1.14-8.76, p = 0.03) compared to non-carriers. This study allowed the identification of PVs specific to early-onset BC, which may be used as a foundation to develop regional expertise and diagnostic tools for early detection of BC in young Kazakh women.
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Affiliation(s)
- Gulnur Zhunussova
- Laboratory of Molecular Genetics, Institute of Genetics and Physiology, Almaty 050060, Kazakhstan
- Al-Farabi Kazakh National University, Almaty 050060, Kazakhstan
| | - Nazgul Omarbayeva
- Kazakh Institute of Oncology and Radiology, Almaty 050060, Kazakhstan
- Asfendiyarov Kazakh National Medical University, Almaty 050060, Kazakhstan
| | - Dilyara Kaidarova
- Kazakh Institute of Oncology and Radiology, Almaty 050060, Kazakhstan
- Asfendiyarov Kazakh National Medical University, Almaty 050060, Kazakhstan
| | - Saltanat Abdikerim
- Laboratory of Molecular Genetics, Institute of Genetics and Physiology, Almaty 050060, Kazakhstan
- Al-Farabi Kazakh National University, Almaty 050060, Kazakhstan
| | - Natalya Mit
- Laboratory of Molecular Genetics, Institute of Genetics and Physiology, Almaty 050060, Kazakhstan
| | - Ilya Kisselev
- Laboratory of Molecular Genetics, Institute of Genetics and Physiology, Almaty 050060, Kazakhstan
| | - Kanagat Yergali
- Laboratory of Molecular Genetics, Institute of Genetics and Physiology, Almaty 050060, Kazakhstan
| | - Aigul Zhunussova
- Laboratory of Molecular Genetics, Institute of Genetics and Physiology, Almaty 050060, Kazakhstan
| | | | - Aliya Abdrakhmanova
- Kazakh Institute of Oncology and Radiology, Almaty 050060, Kazakhstan
- Asfendiyarov Kazakh National Medical University, Almaty 050060, Kazakhstan
| | - Leyla Djansugurova
- Laboratory of Molecular Genetics, Institute of Genetics and Physiology, Almaty 050060, Kazakhstan
- Al-Farabi Kazakh National University, Almaty 050060, Kazakhstan
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11
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Givi JP, Hazard-Jenkins HW, Flanagan M. Educational Case: Hereditary breast and ovarian cancers. Acad Pathol 2023; 10:100091. [PMID: 37719445 PMCID: PMC10504481 DOI: 10.1016/j.acpath.2023.100091] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2022] [Revised: 05/07/2023] [Accepted: 06/18/2023] [Indexed: 09/19/2023] Open
Affiliation(s)
- Jerome P. Givi
- Department of Pathology, Anatomy, and Laboratory Medicine, West Virginia University, Morgantown, WV, USA
| | | | - Melina Flanagan
- Department of Pathology, Anatomy, and Laboratory Medicine, West Virginia University, Morgantown, WV, USA
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12
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Cătană A, Trifa AP, Achimas-Cadariu PA, Bolba-Morar G, Lisencu C, Kutasi E, Chelaru VF, Muntean M, Martin DL, Antone NZ, Fetica B, Pop F, Militaru MS. Hereditary Breast Cancer in Romania-Molecular Particularities and Genetic Counseling Challenges in an Eastern European Country. Biomedicines 2023; 11:biomedicines11051386. [PMID: 37239058 DOI: 10.3390/biomedicines11051386] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2023] [Revised: 04/24/2023] [Accepted: 04/28/2023] [Indexed: 05/28/2023] Open
Abstract
In Romania, breast cancer (BC) is the most common malignancy in women. However, there is limited data on the prevalence of predisposing germline mutations in the population in the era of precision medicine, where molecular testing has become an indispensable tool in cancer diagnosis, prognosis, and therapeutics. Therefore, we conducted a retrospective study to determine the prevalence, mutational spectrum, and histopathological prediction factors for hereditary breast cancer (HBC) in Romania. A cohort of 411 women diagnosed with BC selected upon NCCN v.1.2020 guidelines underwent an 84-gene NGS-based panel testing for breast cancer risk assessment during 2018-2022 in the Department of Oncogenetics of the Oncological Institute of Cluj-Napoca, Romania. A total of 135 (33%) patients presented pathogenic mutations in 19 genes. The prevalence of genetic variants was determined, and demographic and clinicopathological characteristics were analyzed. We observed differences among BRCA and non-BRCA carriers regarding family history of cancer, age of onset, and histopathological subtypes. Triple-negative (TN) tumors were more often BRCA1 positive, unlike BRCA2 positive tumors, which were more often the Luminal B subtype. The most frequent non-BRCA mutations were found in CHEK2, ATM, and PALB2, and several recurrent variants were identified for each gene. Unlike other European countries, germline testing for HBC is still limited due to the high costs and is not covered by the National Health System (NSH), thus leading to significant discrepancies related to the screening and prophylaxis of cancer.
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Affiliation(s)
- Andreea Cătană
- Department of Molecular Sciences, Discipline of Medical Genetics, University of Medicine and Pharmacy Iuliu Hațieganu, Victor Babeș 8, 400347 Cluj-Napoca, Romania
- Breast Cancer Tumour Center, Institute of Oncology I. Chiricuță, Republicii Nr. 34-36, 400015 Cluj-Napoca, Romania
| | - Adrian P Trifa
- Breast Cancer Tumour Center, Institute of Oncology I. Chiricuță, Republicii Nr. 34-36, 400015 Cluj-Napoca, Romania
- Discipline of Medical Genetics, University of Medicine and Pharmacy Victor Babeș, Eftimie Murgu 2, 300041 Timișoara, Romania
| | - Patriciu A Achimas-Cadariu
- Breast Cancer Tumour Center, Institute of Oncology I. Chiricuță, Republicii Nr. 34-36, 400015 Cluj-Napoca, Romania
- Department of Oncology, Discipline of Surgery and Gynecological Oncology, University of Medicine and Pharmacy Iuliu Hațieganu, Republicii Nr. 34-36, 400015 Cluj-Napoca, Romania
| | - Gabriela Bolba-Morar
- Breast Cancer Tumour Center, Institute of Oncology I. Chiricuță, Republicii Nr. 34-36, 400015 Cluj-Napoca, Romania
| | - Carmen Lisencu
- Breast Cancer Tumour Center, Institute of Oncology I. Chiricuță, Republicii Nr. 34-36, 400015 Cluj-Napoca, Romania
| | - Eniko Kutasi
- Department of Molecular Sciences, Discipline of Medical Genetics, University of Medicine and Pharmacy Iuliu Hațieganu, Victor Babeș 8, 400347 Cluj-Napoca, Romania
| | - Vlad F Chelaru
- Department of Molecular Sciences, Discipline of Medical Genetics, University of Medicine and Pharmacy Iuliu Hațieganu, Victor Babeș 8, 400347 Cluj-Napoca, Romania
| | - Maximilian Muntean
- Breast Cancer Tumour Center, Institute of Oncology I. Chiricuță, Republicii Nr. 34-36, 400015 Cluj-Napoca, Romania
- Department of Oncology, Discipline of Surgery and Gynecological Oncology, University of Medicine and Pharmacy Iuliu Hațieganu, Republicii Nr. 34-36, 400015 Cluj-Napoca, Romania
| | - Daniela L Martin
- Breast Cancer Tumour Center, Institute of Oncology I. Chiricuță, Republicii Nr. 34-36, 400015 Cluj-Napoca, Romania
| | - Nicoleta Z Antone
- Breast Cancer Tumour Center, Institute of Oncology I. Chiricuță, Republicii Nr. 34-36, 400015 Cluj-Napoca, Romania
| | - Bogdan Fetica
- Breast Cancer Tumour Center, Institute of Oncology I. Chiricuță, Republicii Nr. 34-36, 400015 Cluj-Napoca, Romania
| | - Florina Pop
- Breast Cancer Tumour Center, Institute of Oncology I. Chiricuță, Republicii Nr. 34-36, 400015 Cluj-Napoca, Romania
| | - Mariela S Militaru
- Department of Molecular Sciences, Discipline of Medical Genetics, University of Medicine and Pharmacy Iuliu Hațieganu, Victor Babeș 8, 400347 Cluj-Napoca, Romania
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13
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Kotnik U, Maver A, Peterlin B, Lovrecic L. Assessment of pathogenic variation in gynecologic cancer genes in a national cohort. Sci Rep 2023; 13:5307. [PMID: 37002323 PMCID: PMC10066348 DOI: 10.1038/s41598-023-32397-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2022] [Accepted: 03/27/2023] [Indexed: 04/03/2023] Open
Abstract
Population-based estimates of pathogenic variation burden in gynecologic cancer predisposition genes are a prerequisite for the development of effective precision public health strategies. This study aims to reveal the burden of pathogenic variants in a comprehensive set of clinically relevant breast, ovarian, and endometrial cancer genes in a large population-based study. We performed a rigorous manual classification procedure to identify pathogenic variants in a panel of 17 gynecologic cancer predisposition genes in a cohort of 7091 individuals, representing 0.35% of the general population. The population burden of pathogenic variants in hereditary gynecologic cancer-related genes in our study was 2.14%. Pathogenic variants in genes ATM, BRCA1, and CDH1 are significantly enriched and the burden of pathogenic variants in CHEK2 is decreased in our population compared to the control population. We have identified a high burden of pathogenic variants in several gynecologic cancer-related genes in the Slovenian population, most importantly in the BRCA1 gene.
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Affiliation(s)
- Urška Kotnik
- Clinical Institute of Genomic Medicine, University Medical Centre Ljubljana, Ljubljana, Slovenia.
- Biotechnical Faculty, University of Ljubljana, Ljubljana, Slovenia.
| | - Aleš Maver
- Clinical Institute of Genomic Medicine, University Medical Centre Ljubljana, Ljubljana, Slovenia
- Faculty of Medicine, University of Ljubljana, Ljubljana, Slovenia
| | - Borut Peterlin
- Clinical Institute of Genomic Medicine, University Medical Centre Ljubljana, Ljubljana, Slovenia
- Faculty of Medicine, University of Ljubljana, Ljubljana, Slovenia
| | - Luca Lovrecic
- Clinical Institute of Genomic Medicine, University Medical Centre Ljubljana, Ljubljana, Slovenia
- Faculty of Medicine, University of Ljubljana, Ljubljana, Slovenia
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14
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Goidescu IG, Nemeti G, Surcel M, Caracostea G, Florian AR, Cruciat G, Staicu A, Muresan D, Goidescu C, Pintican R, Eniu DT. Spectrum of High-Risk Mutations among Breast Cancer Patients Referred for Multigene Panel Testing in a Romanian Population. Cancers (Basel) 2023; 15:cancers15061895. [PMID: 36980780 PMCID: PMC10047778 DOI: 10.3390/cancers15061895] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2023] [Revised: 03/15/2023] [Accepted: 03/20/2023] [Indexed: 03/30/2023] Open
Abstract
(1) Background: Multigene panel testing for Hereditary Breast and Ovarian Cancer (HBOC) using next generation sequencing (NGS) is becoming a standard in medical care. There are insufficient genetic studies reported on breast cancer (BC) patients from Romania and most of them are focused only on BRCA 1/2 genes (Breast cancer 1/2). (2) Methods: NGS was performed in 255 consecutive cases of BC referred for management in our clinic between 2015-2019. (3) Results: From the 171 mutations identified, 85 were in the high-penetrance BC susceptibility genes category, 72 were pathogenic genes, and 13 genes were in the (variants of uncertain significance) VUS genes category. Almost half of the mutations were in the BRCA 1 gene. The most frequent BRCA1 variant was c.3607C>T (14 cases), followed by c.5266dupC (11 cases). Regarding BRCA-2 mutations we identified c.9371A>T (nine cases), followed by c.8755-1G>A in three cases, and we diagnosed VUS mutations in three cases. We also identified six pathogenic variants in the PALB2 gene and two pathogenic variants in (tumor protein P 53) TP53. (4) Conclusions: The majority of pathogenic mutations in the Romanian population with BC were in the BRCA 1/ 2 genes, followed by PALB2 (partner and localizer of BRCA2) and TP53, while in the CDH1 (cadherin 1) and STK11 (Serine/Threonine-Protein Kinase) genes we only identified VUS mutations.
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Affiliation(s)
- Iulian Gabriel Goidescu
- Obstetrics and Gynecology I, Mother and Child Department, University of Medicine and Pharmacy "Iuliu Hatieganu", 400006 Cluj-Napoca, Romania
| | - Georgiana Nemeti
- Obstetrics and Gynecology I, Mother and Child Department, University of Medicine and Pharmacy "Iuliu Hatieganu", 400006 Cluj-Napoca, Romania
| | - Mihai Surcel
- Obstetrics and Gynecology I, Mother and Child Department, University of Medicine and Pharmacy "Iuliu Hatieganu", 400006 Cluj-Napoca, Romania
| | - Gabriela Caracostea
- Obstetrics and Gynecology I, Mother and Child Department, University of Medicine and Pharmacy "Iuliu Hatieganu", 400006 Cluj-Napoca, Romania
| | - Andreea Roxana Florian
- Obstetrics and Gynecology I, Mother and Child Department, University of Medicine and Pharmacy "Iuliu Hatieganu", 400006 Cluj-Napoca, Romania
| | - Gheorghe Cruciat
- Obstetrics and Gynecology I, Mother and Child Department, University of Medicine and Pharmacy "Iuliu Hatieganu", 400006 Cluj-Napoca, Romania
| | - Adelina Staicu
- Obstetrics and Gynecology I, Mother and Child Department, University of Medicine and Pharmacy "Iuliu Hatieganu", 400006 Cluj-Napoca, Romania
| | - Daniel Muresan
- Obstetrics and Gynecology I, Mother and Child Department, University of Medicine and Pharmacy "Iuliu Hatieganu", 400006 Cluj-Napoca, Romania
| | - Cerasela Goidescu
- Department of Internal Medicine, Medical Clinic I-Internal Medicine, Cardiology and Gastroenterology, University of Medicine and Pharmacy "Iuliu Hatieganu", 400006 Cluj-Napoca, Romania
| | - Roxana Pintican
- Department of Radiology, Iuliu Hatieganu University of Medicine and Pharmacy, 400347 Cluj-Napoca, Romania
| | - Dan Tudor Eniu
- Department of Surgery 2, University Emergency Hospital, University of Medicine and Pharmacy "Iuliu Hatieganu", 400006 Cluj-Napoca, Romania
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15
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Ashton NW, Prakash A, Moiseeva TN. Editorial: Regulatory networks in genome stability pathways. Front Genet 2023; 14:1171136. [PMID: 36999052 PMCID: PMC10043461 DOI: 10.3389/fgene.2023.1171136] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2023] [Accepted: 03/06/2023] [Indexed: 03/16/2023] Open
Affiliation(s)
- Nicholas W. Ashton
- National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, MD, United States
- *Correspondence: Nicholas W. Ashton,
| | - Aishwarya Prakash
- Mitchell Cancer Institute, University of South Alabama, Mobile, AL, United States
| | - Tatiana N. Moiseeva
- Department of Chemistry and Biotechnology, Tallinn University of Technology, Tallinn, Estonia
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16
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Mazzonetto P, Milanezi F, D'Andrea M, Martins S, Monfredini PM, Dos Santos Silva J, Perrone E, Villela D, Schnabel B, Nakano V, Palmero EI, Braggio E, Cavalcanti TL, Guida G, Migliavacca MP, Scapulatempo-Neto C, Zalcberg I. BRCA1 and BRCA2 germline mutation analysis from a cohort of 1267 patients at high risk for breast cancer in Brazil. Breast Cancer Res Treat 2023; 199:127-136. [PMID: 36881271 DOI: 10.1007/s10549-023-06892-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2022] [Accepted: 02/11/2023] [Indexed: 03/08/2023]
Abstract
We determined the frequency and mutational spectrum of BRCA1 and BRCA2 in a series of patients at high risk for developing breast cancer from Brazil. A total of 1267 patients were referred for BRCA genetic testing, and no obligation of fulfilling criteria of mutation probability methods for molecular screening was applied. Germline deleterious mutations in BRCA1/2 (i.e., pathogenic/likely pathogenic variants) were identified in 156 out of 1267 patients (12%). We confirm recurrent mutations in BRCA1/2, but we also report three novel mutations in BRCA2, not previously reported in any public databases or other studies. Variants of unknown significance (VUS) represent only 2% in this dataset and most of them were detected in BRCA2. The overall mutation prevalence in BRCA1/2 was higher in patients diagnosed with cancer at age > 35 years old, and with family history of cancer. The present data expand our knowledge of BRCA1/2 germline mutational spectrum, and it is a valuable clinical resource for genetic counseling and cancer management programs in the country.
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Affiliation(s)
- Patricia Mazzonetto
- Diagnósticos da América S.A., DASA, Av. Divino Salvador, 876 3Rd Floor, Zip Code, São Paulo-SP, 04078-013, Brazil
| | - Fernanda Milanezi
- Diagnósticos da América S.A., DASA, Av. Divino Salvador, 876 3Rd Floor, Zip Code, São Paulo-SP, 04078-013, Brazil
| | - Mariana D'Andrea
- Diagnósticos da América S.A., DASA, Av. Divino Salvador, 876 3Rd Floor, Zip Code, São Paulo-SP, 04078-013, Brazil
| | - Silvia Martins
- Diagnósticos da América S.A., DASA, Av. Divino Salvador, 876 3Rd Floor, Zip Code, São Paulo-SP, 04078-013, Brazil
| | - Priscilla M Monfredini
- Diagnósticos da América S.A., DASA, Av. Divino Salvador, 876 3Rd Floor, Zip Code, São Paulo-SP, 04078-013, Brazil
| | - Juliana Dos Santos Silva
- Diagnósticos da América S.A., DASA, Av. Divino Salvador, 876 3Rd Floor, Zip Code, São Paulo-SP, 04078-013, Brazil
| | - Eduardo Perrone
- Diagnósticos da América S.A., DASA, Av. Divino Salvador, 876 3Rd Floor, Zip Code, São Paulo-SP, 04078-013, Brazil
| | - Darine Villela
- Diagnósticos da América S.A., DASA, Av. Divino Salvador, 876 3Rd Floor, Zip Code, São Paulo-SP, 04078-013, Brazil
| | - Beatriz Schnabel
- Diagnósticos da América S.A., DASA, Av. Divino Salvador, 876 3Rd Floor, Zip Code, São Paulo-SP, 04078-013, Brazil
| | - Viviane Nakano
- Diagnósticos da América S.A., DASA, Av. Divino Salvador, 876 3Rd Floor, Zip Code, São Paulo-SP, 04078-013, Brazil
| | - Edenir Inez Palmero
- Diagnósticos da América S.A., DASA, Av. Divino Salvador, 876 3Rd Floor, Zip Code, São Paulo-SP, 04078-013, Brazil
| | - Esteban Braggio
- Diagnósticos da América S.A., DASA, Av. Divino Salvador, 876 3Rd Floor, Zip Code, São Paulo-SP, 04078-013, Brazil
| | - Thereza L Cavalcanti
- Diagnósticos da América S.A., DASA, Av. Divino Salvador, 876 3Rd Floor, Zip Code, São Paulo-SP, 04078-013, Brazil
| | - Gustavo Guida
- Diagnósticos da América S.A., DASA, Av. Divino Salvador, 876 3Rd Floor, Zip Code, São Paulo-SP, 04078-013, Brazil
| | - Michele P Migliavacca
- Diagnósticos da América S.A., DASA, Av. Divino Salvador, 876 3Rd Floor, Zip Code, São Paulo-SP, 04078-013, Brazil
| | - Cristovam Scapulatempo-Neto
- Diagnósticos da América S.A., DASA, Av. Divino Salvador, 876 3Rd Floor, Zip Code, São Paulo-SP, 04078-013, Brazil
| | - Ilana Zalcberg
- Diagnósticos da América S.A., DASA, Av. Divino Salvador, 876 3Rd Floor, Zip Code, São Paulo-SP, 04078-013, Brazil.
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17
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Loboda AP, Adonin LS, Zvereva SD, Guschin DY, Korneenko TV, Telegina AV, Kondratieva OK, Frolova SE, Pestov NB, Barlev NA. BRCA Mutations-The Achilles Heel of Breast, Ovarian and Other Epithelial Cancers. Int J Mol Sci 2023; 24:ijms24054982. [PMID: 36902416 PMCID: PMC10003548 DOI: 10.3390/ijms24054982] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2023] [Revised: 02/27/2023] [Accepted: 03/02/2023] [Indexed: 03/08/2023] Open
Abstract
Two related tumor suppressor genes, BRCA1 and BRCA2, attract a lot of attention from both fundamental and clinical points of view. Oncogenic hereditary mutations in these genes are firmly linked to the early onset of breast and ovarian cancers. However, the molecular mechanisms that drive extensive mutagenesis in these genes are not known. In this review, we hypothesize that one of the potential mechanisms behind this phenomenon can be mediated by Alu mobile genomic elements. Linking mutations in the BRCA1 and BRCA2 genes to the general mechanisms of genome stability and DNA repair is critical to ensure the rationalized choice of anti-cancer therapy. Accordingly, we review the literature available on the mechanisms of DNA damage repair where these proteins are involved, and how the inactivating mutations in these genes (BRCAness) can be exploited in anti-cancer therapy. We also discuss a hypothesis explaining why breast and ovarian epithelial tissues are preferentially susceptible to mutations in BRCA genes. Finally, we discuss prospective novel therapeutic approaches for treating BRCAness cancers.
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Affiliation(s)
- Anna P. Loboda
- Laboratory of Molecular Oncology, Phystech School of Biological and Medical Physics, Moscow Institute of Physics and Technology, 141701 Dolgoprudny, Russia
| | | | - Svetlana D. Zvereva
- Laboratory of Molecular Oncology, Phystech School of Biological and Medical Physics, Moscow Institute of Physics and Technology, 141701 Dolgoprudny, Russia
| | - Dmitri Y. Guschin
- School of Medicine, Nazarbayev University, Astana 010000, Kazakhstan
| | - Tatyana V. Korneenko
- Group of Cross-Linking Enzymes, Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, 117997 Moscow, Russia
| | | | | | | | - Nikolay B. Pestov
- Institute of Biomedical Chemistry, 119121 Moscow, Russia
- Group of Cross-Linking Enzymes, Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, 117997 Moscow, Russia
- Chumakov Federal Scientific Center for Research and Development of Immune-and-Biological Products, 108819 Moscow, Russia
- Correspondence: (N.B.P.); (N.A.B.)
| | - Nick A. Barlev
- Institute of Biomedical Chemistry, 119121 Moscow, Russia
- School of Medicine, Nazarbayev University, Astana 010000, Kazakhstan
- Chumakov Federal Scientific Center for Research and Development of Immune-and-Biological Products, 108819 Moscow, Russia
- Institute of Cytology, Tikhoretsky ave 4, 194064 St-Petersburg, Russia
- Correspondence: (N.B.P.); (N.A.B.)
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18
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Abdallah N, Purrington KS, Tatineni S, Assad H, Petrucelli N, Simon MS. Racial and ethnic variation in BRCA1 and BRCA2 genetic test results among individuals referred for genetic counseling at a large urban comprehensive cancer center. Cancer Causes Control 2023; 34:141-149. [PMID: 36370215 DOI: 10.1007/s10552-022-01648-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2022] [Accepted: 10/24/2022] [Indexed: 11/15/2022]
Abstract
PURPOSE The prevalence of pathogenic variants in BRCA1 and BRCA2 in populations other than Ashkenazi Jewish (AJ) is not well defined. We describe the racial and ethnic-specific prevalence of BRCA1/2 pathogenic variants and variants of uncertain significance (VUS) among individuals referred for genetic testing in a large urban comprehensive cancer center over a 20-year period. METHODS The population included 3,537 unrelated individuals who underwent genetic testing from January 1999 to October 2019 at the Karmanos Cancer Institute. We estimated the prevalence of pathogenic variants and VUS and evaluated associations with race and ethnicity for African American (AA), Arab, AJ and Hispanic individuals compared to Non-Hispanic Whites (NHW). We used multivariable models to adjust for other predictors of pathogenic variants. We also reported the most common pathogenic variants by racial and ethnic group. RESULTS The racial and ethnic breakdown of our population was: NHW (68.9%), AA (20.3%), AJ (2.5%), Arab (2.2%), Hispanic (1.0%), Asian Pacific Islander, Native American/Alaskan Native (4.7%), and < 1% unknown. The overall prevalence of pathogenic variants in BRCA1/2 was 8.9% and the prevalence of VUS was 5.6%. Compared to NHW, there were no racial or ethnic differences in the rate of pathogenic variants. However, AA individuals were more likely to have VUS in BRCA1 (adjusted OR 2.43, 95% CI 1.38-4.28) and AJ were more likely to have VUS in BRCA2 (adjusted OR 3.50, 95% CI 1.61-6.58). CONCLUSION These results suggest the continued need for genetic testing and variant reclassification for individuals of all racial and ethnic groups.
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Affiliation(s)
- Nadine Abdallah
- Department of Internal Medicine, Division of Oncology, Mayo Clinic, Rochester, MN, USA
| | - Kristen S Purrington
- Department of Oncology, Karmanos Cancer Institute at Wayne State University, Detroit, MI, USA.,Population Studies and Disparities Research Program, Barbara Ann Karmanos Cancer Institute, Detroit, MI, USA
| | - Sushma Tatineni
- Department of Oncology, Minnesota Oncology, Minneapolis, MN, USA
| | - Hadeel Assad
- Department of Oncology, Karmanos Cancer Institute at Wayne State University, Detroit, MI, USA.,Population Studies and Disparities Research Program, Barbara Ann Karmanos Cancer Institute, Detroit, MI, USA
| | - Nancie Petrucelli
- Department of Oncology, Karmanos Cancer Institute at Wayne State University, Detroit, MI, USA
| | - Michael S Simon
- Department of Oncology, Karmanos Cancer Institute at Wayne State University, Detroit, MI, USA. .,Population Studies and Disparities Research Program, Barbara Ann Karmanos Cancer Institute, Detroit, MI, USA.
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19
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Carvalho CMD, Braga LDC, Silva LM, Chami AM, Silva Filho ALD. Germline Mutations Landscape in a Cohort of the State of Minas Gerais, Brazil, in Patients Who Underwent Genetic Counseling for Gynecological and Breast Cancer. REVISTA BRASILEIRA DE GINECOLOGIA E OBSTETRÍCIA 2023; 45:74-81. [PMID: 36977404 PMCID: PMC10078886 DOI: 10.1055/s-0042-1757956] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/30/2023] Open
Abstract
OBJECTIVE The present study evaluated the profile of germline mutations present in patients who underwent genetic counseling for risk assessment for breast cancer (BC), ovarian cancer (OC), and endometrial cancer (EC) with a possible hereditary pattern. METHODS Medical records of 382 patients who underwent genetic counseling after signing an informed consent form were analyzed. A total of 55.76% of patients (213/382) were symptomatic (personal history of cancer), and 44.24% (169/382) were asymptomatic (absence of the disease). The variables analyzed were age, sex, place of birth, personal or family history of BC, OC, EC, as well as other types of cancer associated with hereditary syndromes. The Human Genome Variation Society (HGVS) nomenclature guidelines were used to name the variants, and their biological significance was determined by comparing 11 databases. RESULTS We identified 53 distinct mutations: 29 pathogenic variants, 13 variants of undetermined significance (VUS), and 11 benign. The most frequent mutations were BRCA1 c.470_471delCT, BRCA1 c.4675 + 1G > T, and BRCA2 c.2T> G. Furthermore, 21 variants appear to have been described for the first time in Brazil. In addition to BRCA1/2 mutations, variants in other genes related to hereditary syndromes that predispose to gynecological cancers were found. CONCLUSION This study allowed a deeper understanding of the main mutations identified in families in the state of Minas Gerais and demonstrates the need to assess the family history of non-gynecological cancer for risk assessment of BC, OC, and EC. Moreover, it is an effort that contributes to population studies to evaluate the cancer risk mutation profile in Brazil.
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Affiliation(s)
- Camila Martins de Carvalho
- Department of Obstetrics and Gynecology, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil
| | - Letícia da Conceição Braga
- OncoTag Desenvolvimento de Produtos e Serviços para Saúde Humana, Belo Horizonte, MG, Brazil
- Translational Research Laboratory in Oncology, Instituto Mário Penna-Ensino, Pesquisa e Inovação, Belo Horizonte, MG, Brazil
| | - Luciana Maria Silva
- OncoTag Desenvolvimento de Produtos e Serviços para Saúde Humana, Belo Horizonte, MG, Brazil
- Cell Biology Service, Diretoria de Pesquisa e Desenvolvimento, Fundação Ezequiel Dias, Belo Horizonte, MG, Brazil
| | - Anisse Marques Chami
- School of Medicine, Campus Botucatu, Universidade Estadual Paulista, Belo Horizonte, MG, Brazil
| | - Agnaldo Lopes da Silva Filho
- Department of Obstetrics and Gynecology, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil
- School of Medicine, Campus Botucatu, Universidade Estadual Paulista, Belo Horizonte, MG, Brazil
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20
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Kechin A, Boyarskikh U, Barinov A, Tanas A, Kazakova S, Zhevlova A, Khrapov E, Subbotin S, Mishukova O, Kekeeva T, Demidova I, Filipenko M. A spectrum of BRCA1 and BRCA2 germline deleterious variants in ovarian cancer in Russia. Breast Cancer Res Treat 2023; 197:387-395. [PMID: 36367610 DOI: 10.1007/s10549-022-06782-2] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2022] [Accepted: 10/23/2022] [Indexed: 11/13/2022]
Abstract
PURPOSE Pathogenic variants (PVs) in BRCA1 and BRCA2 genes are essential biomarkers of an increased breast and ovarian cancer risk and tumor sensitivity to poly ADP ribose polymerase inhibitors. In Russia, eight PVs were thought to be the most common, among which BRCA1 c.5266dup is the most frequently identified one. METHODS We show the distribution of BRCA1/2 PVs identified with quantitative PCR and targeted next-generation sequencing in 1399 ovarian cancer patients recruited into the study from 72 Russian regions in 2015-2021. RESULTS The most abundant PVs were c.5266dup (41.0%), c.4035del (7.0%), c.1961del (6.3%), c.181 T > G (5.2%), c.3756_3759del (1.8%), c.3700_3704del (1.5%), and c.68_69del (1.5%), all found in BRCA1 and known to be recurrent in Russia. Several other frequent PVs were identified: c.5152 + 1G > T (1.2%), c.1687C > T (1.0%), c.4689C > G (0.9%), c.1510del (0.6%), c.2285_2286del (0.6%) in the BRCA1 gene; and c.5286 T > G (1.2%), c.2808_2811del (0.8%), c.3847_3848del (0.8%), c.658_659del (0.7%), c.7879A > T (0.6%), in the BRCA2 gene. For the most common PV in the BRCA2 gene c.5286 T > G, we suggested that it arose about 700 years ago and is a new founder mutation. CONCLUSION This study extends our knowledge about the BRCA1 and BRCA2 pathogenic variants variability.
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Affiliation(s)
- Andrey Kechin
- Institute of Chemical Biology and Fundamental Medicine, Siberian Branch of the Russian Academy of Sciences, Novosibirsk, 630090, Russia. .,Novosibirsk State University, Novosibirsk, 630090, Russia.
| | - Ulyana Boyarskikh
- Institute of Chemical Biology and Fundamental Medicine, Siberian Branch of the Russian Academy of Sciences, Novosibirsk, 630090, Russia
| | - Alexey Barinov
- Moscow City Oncology Hospital No 62 of the Moscow Health Department, Istra, 143423, Russia
| | - Alexander Tanas
- Research Centre for Medical Genetics, Moscow, 115522, Russia
| | | | | | - Evgeniy Khrapov
- Institute of Chemical Biology and Fundamental Medicine, Siberian Branch of the Russian Academy of Sciences, Novosibirsk, 630090, Russia
| | - Sergey Subbotin
- Institute of Chemical Biology and Fundamental Medicine, Siberian Branch of the Russian Academy of Sciences, Novosibirsk, 630090, Russia
| | - Olga Mishukova
- Institute of Chemical Biology and Fundamental Medicine, Siberian Branch of the Russian Academy of Sciences, Novosibirsk, 630090, Russia
| | - Tatiana Kekeeva
- Research Centre for Medical Genetics, Moscow, 115522, Russia
| | - Irina Demidova
- Moscow City Oncology Hospital No 62 of the Moscow Health Department, Istra, 143423, Russia
| | - Maxim Filipenko
- Institute of Chemical Biology and Fundamental Medicine, Siberian Branch of the Russian Academy of Sciences, Novosibirsk, 630090, Russia.,Novosibirsk State University, Novosibirsk, 630090, Russia
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21
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Doraczynska-Kowalik A, Michalowska D, Matkowski R, Czykalko E, Blomka D, Semeniuk M, Abrahamowska M, Janus-Szymanska G, Mlynarczykowska P, Szynglarewicz B, Pawlak I, Maciejczyk A, Laczmanska I. Detection of BRCA1/2 pathogenic variants in patients with breast and/or ovarian cancer and their families. Analysis of 3,458 cases from Lower Silesia (Poland) according to the diagnostic algorithm of the National Cancer Control Programme. Front Genet 2022; 13:941375. [PMID: 36171877 PMCID: PMC9510890 DOI: 10.3389/fgene.2022.941375] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2022] [Accepted: 08/03/2022] [Indexed: 11/30/2022] Open
Abstract
Breast and ovarian cancers are among the most common malignancies in the female population, with approximately 5–10% of cases being hereditary. BRCA1 and BRCA2 with other homologous recombination genes are the most tested genes in hereditary breast and ovarian cancer (HBOC) patients. As next-generation sequencing (NGS) has become a standard and popular technique, such as for HBOC, it has greatly simplified and accelerated molecular diagnosis of cancer. The study group included 3,458 HBOC patients or their relatives from Lower Silesia (Poland) (a voivodeship located in south-west Poland inhabited by 2.9 million people). All patients were tested according to the recommendations from the National Cancer Control Programme of the Ministry of Health for the years 2018–21. We tested 3,400 patients for recurrent pathogenic variants for the Polish population: five BRCA1 founder variants (c.5266dup, c.181T>G, c.4035del, c.3700_3704del, and c.68_69del), two PALB2 variants (c.509_510del, c.172_175del) and three CHEK2 variants [c.1100del, c.444+1G>A, g.27417113-27422508del (del5395)]. Next 260 patients from the study group were chosen for the BRCA1/2 NGS panel, and additionally selected marker pathogenic variants were tested using Sanger sequencing and MLPA methods in 45 and 13 individuals, respectively. The analysis of BRCA1/2 in the 3,458 patients with HBOC or their relatives revealed 144 carriers of 37 different pathogenic variants (22 in BRCA1 and 15 in BRCA2). Among all detected variants, 71.53% constituted founder pathogenic BRCA1 variants. Our study has revealed that for the Lower Silesian population, the first-line BRCA1/2 molecular test may be limited to only three variants in BRCA1—c.5266dup, c.181T>G, and c.4035del—but the aim should be to provide a full screening test of HBOC critical genes. The key and still growing role of molecular diagnostics of neoplasms, which includes HBOC, is undeniable. Therefore, it is necessary to provide complete and optimal therapeutic and prophylactic algorithms in line with current medical knowledge.
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Affiliation(s)
- Anna Doraczynska-Kowalik
- Lower Silesian Oncology, Pulmonology and Hematology Center, Wroclaw, Poland
- Department of Genetics, Wroclaw Medical University, Wroclaw, Poland
- *Correspondence: Rafal Matkowski,
| | - Dagmara Michalowska
- Lower Silesian Oncology, Pulmonology and Hematology Center, Wroclaw, Poland
- *Correspondence: Rafal Matkowski,
| | - Rafal Matkowski
- Lower Silesian Oncology, Pulmonology and Hematology Center, Wroclaw, Poland
- Department of Oncology, Wroclaw Medical University, Wroclaw, Poland
- *Correspondence: Rafal Matkowski,
| | - Ewelina Czykalko
- Lower Silesian Oncology, Pulmonology and Hematology Center, Wroclaw, Poland
| | - Dorota Blomka
- Lower Silesian Oncology, Pulmonology and Hematology Center, Wroclaw, Poland
| | - Mariola Semeniuk
- Lower Silesian Oncology, Pulmonology and Hematology Center, Wroclaw, Poland
| | | | - Gabriela Janus-Szymanska
- Lower Silesian Oncology, Pulmonology and Hematology Center, Wroclaw, Poland
- Department of Genetics, Wroclaw Medical University, Wroclaw, Poland
| | | | - Bartlomiej Szynglarewicz
- Lower Silesian Oncology, Pulmonology and Hematology Center, Wroclaw, Poland
- Department of Oncology, Wroclaw Medical University, Wroclaw, Poland
| | - Ireneusz Pawlak
- Lower Silesian Oncology, Pulmonology and Hematology Center, Wroclaw, Poland
| | - Adam Maciejczyk
- Lower Silesian Oncology, Pulmonology and Hematology Center, Wroclaw, Poland
- Department of Oncology, Wroclaw Medical University, Wroclaw, Poland
| | - Izabela Laczmanska
- Lower Silesian Oncology, Pulmonology and Hematology Center, Wroclaw, Poland
- Department of Genetics, Wroclaw Medical University, Wroclaw, Poland
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22
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Qin X, Zhou J, Wang Z, Feng C, Fan J, Huang J, Hu D, Baban B, Wang S, Ma D, Sun C, Zhou Z, Chen G. Metagenomic analysis of the microbiome of the upper reproductive tract: combating ovarian cancer through predictive, preventive, and personalized medicine. EPMA J 2022; 13:487-498. [PMID: 35762010 PMCID: PMC9219379 DOI: 10.1007/s13167-022-00286-1] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2022] [Accepted: 05/12/2022] [Indexed: 11/03/2022]
Abstract
Purpose We investigated whether ovarian cancer could alter the genital microbiota in a specific way with clinical values. Furthermore, we proposed how such changes could be envisioned in a paradigm of predictive, preventive, and personalized medicine (PPPM). Methods The samples were collected using cotton swabs from the cervical, uterine cavity, fallopian tubes, and ovaries of patients subjected to the surgical procedures for the malignant/benign lesions. All samples were then analyzed by metagenomic shotgun sequencing. The distribution patterns and characteristics of the microbiota in the reproductive tract of subjects were analyzed and were interpreted in relation to the clinical outcomes of the subjects. Results While the ovarian cancer was able to alter the genital microbiota, the bacteria were the dominant microorganisms in all samples across all cohorts in the study (median 99%). The microbiota of the upper female reproductive tract were mainly from the cervical, identified by low bacterial biomass and high bacterial diversity. Ovarian cancer had a distinct microbiota signature. The tubal ligation affects its microbial distribution. There were no different species on the surface of platinum-sensitive ovarian tissues compared to samples from platinum-resistant patients. Conclusion The ovarian cancer-induced changes in microbiota magnify the potential of microbiota as a biotherapeutic modality in the treatment of ovarian cancer in this study and very likely for several malignancies and other conditions. Our findings demonstrated, for the first time, that microbiota could be dissected and applied in more specific fashion based on a predictive, preventive, and personalized medicine (PPPM) model in the treatment of ovarian cancer. Utilizing microbiota portfolio in a PPPM system in ovarian cancer would provide a unique opportunity to a clinically intelligent and novel approach in the treatment of ovarian cancer as well as several other conditions and malignancies. Supplementary Information The online version contains supplementary material available at 10.1007/s13167-022-00286-1.
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Affiliation(s)
- Xu Qin
- Cancer Biology Research Center, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.,Department of Stomatology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Jianglin Zhou
- Beijing Institute of Microbiology and Epidemiology, Beijing, China
| | - Zizhuo Wang
- Cancer Biology Research Center, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.,Department of Obstetrics and Gynecology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Chenzhao Feng
- Cancer Biology Research Center, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.,Department of Obstetrics and Gynecology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Junpeng Fan
- Cancer Biology Research Center, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.,Department of Obstetrics and Gynecology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Jia Huang
- Cancer Biology Research Center, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.,Department of Obstetrics and Gynecology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Dianxing Hu
- Cancer Biology Research Center, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.,Department of Obstetrics and Gynecology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Babak Baban
- Medical College of Georgia, Augusta University, Augusta, GA USA
| | - Shengqi Wang
- Beijing Institute of Microbiology and Epidemiology, Beijing, China
| | - Ding Ma
- Cancer Biology Research Center, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.,Department of Obstetrics and Gynecology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Chaoyang Sun
- Cancer Biology Research Center, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.,Department of Obstetrics and Gynecology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Zhe Zhou
- Beijing Institute of Microbiology and Epidemiology, Beijing, China
| | - Gang Chen
- Cancer Biology Research Center, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.,Department of Obstetrics and Gynecology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
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23
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Elalaoui SC, Laarabi FZ, Afif L, Lyahyai J, Ratbi I, Jaouad IC, Doubaj Y, Sahli M, Ouhenach M, Sefiani A. Mutational spectrum of BRCA1/2 genes in Moroccan patients with hereditary breast and/or ovarian cancer, and review of BRCA mutations in the MENA region. Breast Cancer Res Treat 2022; 194:187-198. [PMID: 35578052 DOI: 10.1007/s10549-022-06622-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2022] [Accepted: 05/01/2022] [Indexed: 11/28/2022]
Abstract
PURPOSE Breast cancer (BC) is the most common form of female cancer around the world. BC is mostly sporadic, and rarely hereditary. These hereditary forms are mostly BRCA1- and BRCA2-associated hereditary breast and ovarian cancer syndrome. BRCA1 and BRCA2 genes are large and had some recurrent mutations specific to some populations. Through this work we analyze the most recurrent mutations in Moroccan population and compared them to a large review of other BRCA1/2 spectrum mutations in the MENA region. METHODS We report in this work a series of 163 unrelated patients (the largest series of Moroccan patients) with familial breast and/or ovarian cancer, selected among patients referred to our oncogenetic outpatient clinic, from 2006 to 2021. To identify genetic variants in these two genes, different genetic analysis strategies have been carried out, using Sanger Sequencing DNA or Target Panel Sequencing. RESULTS Pathogenic variants were identified in 27.6% of patients. The most frequent mutation identified in our patients was the c.1310_1313delAAGA, BRCA2 (33%), and three other mutations seem more frequent in the Moroccan population (33%) of all reported patients: c.798_799delTT, BRCA1; and c.3279delC, BRCA1; and c.7234_7235insG in BRCA2 gene. CONCLUSION Through this work, we emphasize the importance of screening for BRCA1 and BRCA2 recurrent mutations in Moroccan patients. Other MENA (MENA: English-language acronym referring to the Middle East and North Africa region) countries had also some recurrent BRCA mutations, which will allow a fast and unexpensive first line genetic analysis and a precise molecular diagnosis. This will allow an adapted follow-up of the patients and a pre-symptomatic diagnosis of their relatives.
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Affiliation(s)
- Siham Chafai Elalaoui
- Génomique et Epidémiologie Moléculaire des Maladies Génétiques (G2MG), Centre GENOPATH, Faculté de Médecine et de Pharmacie, Mohammed V University, Rabat, Morocco. .,Département de Génétique Médicale, Institut National d'Hygiène, 27 Avenue Ibn Batouta, B.P 769, 11400, Rabat, Morocco.
| | | | - Lamiae Afif
- Génomique et Epidémiologie Moléculaire des Maladies Génétiques (G2MG), Centre GENOPATH, Faculté de Médecine et de Pharmacie, Mohammed V University, Rabat, Morocco.,Département de Génétique Médicale, Institut National d'Hygiène, 27 Avenue Ibn Batouta, B.P 769, 11400, Rabat, Morocco
| | - Jaber Lyahyai
- Génomique et Epidémiologie Moléculaire des Maladies Génétiques (G2MG), Centre GENOPATH, Faculté de Médecine et de Pharmacie, Mohammed V University, Rabat, Morocco.,Département de Génétique Médicale, Institut National d'Hygiène, 27 Avenue Ibn Batouta, B.P 769, 11400, Rabat, Morocco
| | - Ilham Ratbi
- Génomique et Epidémiologie Moléculaire des Maladies Génétiques (G2MG), Centre GENOPATH, Faculté de Médecine et de Pharmacie, Mohammed V University, Rabat, Morocco.,Département de Génétique Médicale, Institut National d'Hygiène, 27 Avenue Ibn Batouta, B.P 769, 11400, Rabat, Morocco
| | - Imane Cherkaoui Jaouad
- Département de Génétique Médicale, Institut National d'Hygiène, 27 Avenue Ibn Batouta, B.P 769, 11400, Rabat, Morocco
| | - Yassamine Doubaj
- Département de Génétique Médicale, Institut National d'Hygiène, 27 Avenue Ibn Batouta, B.P 769, 11400, Rabat, Morocco
| | - Meryem Sahli
- Département de Génétique Médicale, Institut National d'Hygiène, 27 Avenue Ibn Batouta, B.P 769, 11400, Rabat, Morocco
| | - Mouna Ouhenach
- Département de Génétique Médicale, Institut National d'Hygiène, 27 Avenue Ibn Batouta, B.P 769, 11400, Rabat, Morocco
| | - Abdelaziz Sefiani
- Génomique et Epidémiologie Moléculaire des Maladies Génétiques (G2MG), Centre GENOPATH, Faculté de Médecine et de Pharmacie, Mohammed V University, Rabat, Morocco.,Département de Génétique Médicale, Institut National d'Hygiène, 27 Avenue Ibn Batouta, B.P 769, 11400, Rabat, Morocco
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24
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Discovery of BRCA1/BRCA2 Founder Variants by Haplotype Analysis. Cancer Genet 2022; 266-267:19-27. [DOI: 10.1016/j.cancergen.2022.05.042] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2021] [Revised: 05/22/2022] [Accepted: 05/26/2022] [Indexed: 11/20/2022]
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25
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Spectrum of BRCA1/2 Mutations in Romanian Breast and Ovarian Cancer Patients. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2022; 19:ijerph19074314. [PMID: 35409996 PMCID: PMC8998351 DOI: 10.3390/ijerph19074314] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 02/03/2022] [Revised: 03/31/2022] [Accepted: 04/02/2022] [Indexed: 11/16/2022]
Abstract
Background: About 10,000 women are diagnosed with breast cancer and about 2000 women are diagnosed with ovarian cancer each year in Romania. There is an insufficient number of genetic studies in the Romanian population to identify patients at high risk of inherited breast and ovarian cancer. Methods: We evaluated 250 women of Romanian ethnicity with BC and 240 women of Romanian ethnicity with ovarian cancer for the presence of damaging germline mutations in breast cancer genes 1 and 2 (BRCA1 and BRCA2, respectively) using Next-Generation Sequencing (NGS) technology. Results: Of the 250 breast cancer patients, 47 carried a disease-predisposing BRCA mutation (30 patients (63.83%) with a BRCA1 mutation and 17 patients (36.17%) with a BRCA2 mutation). Of the 240 ovarian cancer patients, 60 carried a BRCA mutation (43 patients (72%) with a BRCA1 mutation and 17 patients (28%) with a BRCA2 mutation). In the BRCA1 gene, we identified 18 variants (4 in both patient groups (ovarian and breast cancer patients), 1 mutation variant in the BC patient group, and 13 mutation variants in the ovarian cancer patient group). In the BRCA2 gene, we identified 17 variants (1 variant in both ovarian and breast cancer patients, 6 distinct variants in BC patients, and 10 distinct variants in ovarian cancer patients). The prevailing mutation variants identified were c.3607C>T (BRCA1) (18 cases) followed by c.5266dupC (BRCA1) (17 cases) and c.9371A>T (BRCA2) (12 cases). The most prevalent mutation, BRCA1 c.3607C>T, which is less common in the Romanian population, was mainly associated with triple-negative BC and ovarian serous adenocarcinoma. Conclusion: The results of our analysis may help to establish specific variants of BRCA mutations in the Romanian population and identify individuals at high risk of hereditary breast and ovarian cancer syndrome by genetic testing.
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26
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Stella S, Vitale SR, Martorana F, Massimino M, Pavone G, Lanzafame K, Bianca S, Barone C, Gorgone C, Fichera M, Manzella L. Mutational Analysis of BRCA1 and BRCA2 Genes in Breast Cancer Patients from Eastern Sicily. Cancer Manag Res 2022; 14:1341-1352. [PMID: 35411189 PMCID: PMC8994564 DOI: 10.2147/cmar.s348529] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2021] [Accepted: 01/26/2022] [Indexed: 11/23/2022] Open
Abstract
Purpose Germline mutations of BRCA1 and BRCA2 are associated with a defined lifetime risk of breast (BC), ovarian (OC) and other cancers. Testing BRCA genes is pivotal to assess individual risk, but also to pursue preventive approaches in healthy carriers and tailored treatments in tumor patients. The prevalence of BRCA1 and BRCA2 alterations varies broadly across different geographic regions and, despite data about BRCA pathogenic variants among Sicilian families exist, studies specifically addressing eastern Sicily population are lacking. The aim of our study was to investigate the incidence and distribution of BRCA pathogenic germline alterations in a cohort of BC patients from eastern Sicily and to evaluate their associations with specific BC features. Patients and Methods Mutational status was assessed in a cohort of 389 BC patients, using next generation sequencing. The presence of alterations was correlated with tumor grading and proliferation index. Results Overall, 35 patients (9%) harbored a BRCA pathogenic variant, 17 (49%) in BRCA1 and 18 (51%) in BRCA2. BRCA1 alterations were prevalent among triple negative BC patients, whereas BRCA2 mutations were more common in subjects with luminal B BC. Tumor grading and proliferation index were both significantly higher among subjects with BRCA1 variants compared to non-carriers. Conclusion Our findings provide an overview about BRCA mutational status among BC patients from eastern Sicily and confirm the role of NGS analysis to identify hereditary BC patients. Overall, these data are consistent with previous evidences supporting BRCA screening to properly prevent and treat cancer among mutation carriers.
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Affiliation(s)
- Stefania Stella
- Department of Clinical and Experimental Medicine, University of Catania, Catania, 95123, Italy
- Center of Experimental Oncology and Hematology, A.O.U. Policlinico “G. Rodolico - San Marco”, Catania, 95123, Italy
- Correspondence: Stefania Stella, Tel +39 095 378 1946, Email ;
| | - Silvia Rita Vitale
- Department of Clinical and Experimental Medicine, University of Catania, Catania, 95123, Italy
- Center of Experimental Oncology and Hematology, A.O.U. Policlinico “G. Rodolico - San Marco”, Catania, 95123, Italy
| | - Federica Martorana
- Department of Clinical and Experimental Medicine, University of Catania, Catania, 95123, Italy
- Center of Experimental Oncology and Hematology, A.O.U. Policlinico “G. Rodolico - San Marco”, Catania, 95123, Italy
| | - Michele Massimino
- Department of Clinical and Experimental Medicine, University of Catania, Catania, 95123, Italy
- Center of Experimental Oncology and Hematology, A.O.U. Policlinico “G. Rodolico - San Marco”, Catania, 95123, Italy
| | - Giuliana Pavone
- Medical Oncology, A.O.U. Policlinico “G. Rodolico - San Marco”, Catania, 95123, Italy
| | - Katia Lanzafame
- Medical Oncology, A.O.U. Policlinico “G. Rodolico - San Marco”, Catania, 95123, Italy
| | | | | | - Cristina Gorgone
- Department of Biomedical and Biotechnological Sciences, Medical Genetics, University of Catania, Catania, 95123, Italy
| | - Marco Fichera
- Department of Biomedical and Biotechnological Sciences, Medical Genetics, University of Catania, Catania, 95123, Italy
- Oasi Research Institute-IRCCS, Troina, 94018, Italy
| | - Livia Manzella
- Department of Clinical and Experimental Medicine, University of Catania, Catania, 95123, Italy
- Center of Experimental Oncology and Hematology, A.O.U. Policlinico “G. Rodolico - San Marco”, Catania, 95123, Italy
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27
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Freire MV, Martin M, Thissen R, Van Marcke C, Segers K, Sépulchre E, Leroi N, Lété C, Fasquelle C, Radermacher J, Gokburun Y, Collignon J, Sacré A, Josse C, Palmeira L, Bours V. Case Report Series: Aggressive HR Deficient Colorectal Cancers Related to BRCA1 Pathogenic Germline Variants. Front Oncol 2022; 12:835581. [PMID: 35280729 PMCID: PMC8911702 DOI: 10.3389/fonc.2022.835581] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2021] [Accepted: 02/01/2022] [Indexed: 12/31/2022] Open
Abstract
Objective The link between BRCA1 and homologous recombination deficiency (HRD) in cancer has gained importance with the emergence of new targeted cancer treatments, while the available data on the role of the gene in colorectal cancer (CRC) remain contradictory. The aim of this case series was to elucidate the role of known pathogenic BRCA1 variants in the development of early-onset CRC. Design Patients were evaluated using targeted next generation sequencing, exome sequencing and chromosomal microarray analysis of the paired germline and tumor samples. These results were used to calculate the HRD score and the frequency of mutational signatures in the tumors. Results Three patients with metastatic CRC were heterozygous for a previously known BRCA1 nonsense variant. All tumors showed remarkably high HRD scores, and the HRD-related signature 3 had the second highest contribution to the somatic pattern of variant accumulation in the samples (23% in 1 and 2, and 13% in sample 3). Conclusions A BRCA1 germline pathogenic variant can be involved in CRC development through HRD. Thus, BRCA1 testing should be considered in young patients with a personal history of microsatellite stable CRC as this could further allow a personalized treatment approach.
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Affiliation(s)
- Maria Valeria Freire
- Department of Human Genetics, GIGA Research Center - University of Liège and Centre Hospitalier Universitaire (CHU) Liège, Liège, Belgium
| | - Marie Martin
- Department of Human Genetics, GIGA Research Center - University of Liège and Centre Hospitalier Universitaire (CHU) Liège, Liège, Belgium
| | - Romain Thissen
- Department of Human Genetics, GIGA Research Center - University of Liège and Centre Hospitalier Universitaire (CHU) Liège, Liège, Belgium
| | - Cédric Van Marcke
- Institute for Experimental and Clinical Research (Institut de Recherche Expérimentale et Clinique (IREC), Pôle Molecular Imaging, Radiotherapy and Oncology (MIRO)), Université Catholique de Louvain (UCLouvain), Brussels, Belgium.,Department of Medical Oncology, Institut Roi Albert II, Cliniques Universitaires Saint-Luc, Brussels, Belgium
| | - Karin Segers
- Department of Human Genetics, GIGA Research Center - University of Liège and Centre Hospitalier Universitaire (CHU) Liège, Liège, Belgium
| | - Edith Sépulchre
- Department of Human Genetics, GIGA Research Center - University of Liège and Centre Hospitalier Universitaire (CHU) Liège, Liège, Belgium
| | - Natacha Leroi
- Department of Human Genetics, GIGA Research Center - University of Liège and Centre Hospitalier Universitaire (CHU) Liège, Liège, Belgium
| | - Céline Lété
- Department of Human Genetics, GIGA Research Center - University of Liège and Centre Hospitalier Universitaire (CHU) Liège, Liège, Belgium
| | - Corinne Fasquelle
- Department of Human Genetics, GIGA Research Center - University of Liège and Centre Hospitalier Universitaire (CHU) Liège, Liège, Belgium
| | - Jean Radermacher
- Department of Pathology, Institut de Pathologie et de Génétique, Charleroi, Belgium
| | - Yeter Gokburun
- Department of Gastroenterology, Centre Hospitalier Régional Sambre et Meuse, Namur, Belgium
| | - Joelle Collignon
- Department of Medical Oncology, GIGA Research Center - University of Liège and Centre Hospitalier Universitaire (CHU) Liège, Liège, Belgium
| | - Anne Sacré
- Onco-Hematology Department, Centre Hospitalier Régional (CHR) Verviers, Verviers, Belgium
| | - Claire Josse
- Department of Medical Oncology, GIGA Research Center - University of Liège and Centre Hospitalier Universitaire (CHU) Liège, Liège, Belgium
| | - Leonor Palmeira
- Department of Human Genetics, GIGA Research Center - University of Liège and Centre Hospitalier Universitaire (CHU) Liège, Liège, Belgium
| | - Vincent Bours
- Department of Human Genetics, GIGA Research Center - University of Liège and Centre Hospitalier Universitaire (CHU) Liège, Liège, Belgium
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ElBiad O, Laraqui A, El Boukhrissi F, Mounjid C, Lamsisi M, Bajjou T, Elannaz H, Lahlou AI, Kouach J, Benchekroune K, Oukabli M, Chahdi H, Ennaji MM, Tanz R, Sbitti Y, Ichou M, Ennibi K, Badaoui B, Sekhsokh Y. Prevalence of specific and recurrent/founder pathogenic variants in BRCA genes in breast and ovarian cancer in North Africa. BMC Cancer 2022; 22:208. [PMID: 35216584 PMCID: PMC8876448 DOI: 10.1186/s12885-022-09181-4] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2021] [Accepted: 11/24/2021] [Indexed: 12/11/2022] Open
Abstract
Background Elucidation of specific and recurrent/founder pathogenic variants (PVs) in BRCA (BRCA1 and BRCA2) genes can make the genetic testing, for breast cancer (BC) and/or ovarian cancer (OC), affordable for developing nations. Methods To establish the knowledge about BRCA PVs and to determine the prevalence of the specific and recurrent/founder variants in BRCA genes in BC and/or OC women in North Africa, a systematic review was conducted in Morocco, Algeria, and Tunisia. Results Search of the databases yielded 25 relevant references, including eleven studies in Morocco, five in Algeria, and nine in Tunisia. Overall, 15 studies investigated both BRCA1 and BRCA2 genes, four studies examined the entire coding region of the BRCA1 gene, and six studies in which the analysis was limited to a few BRCA1 and/or BRCA2 exons. Overall, 76 PVs (44 in BRCA1 and32 in BRCA2) were identified in 196 BC and/or OC patients (129 BRCA1 and 67 BRCA2 carriers). Eighteen of the 76 (23.7%) PVs [10/44 (22.7%) in BRCA1 and 8/32 (25%) in BRCA2] were reported for the first time and considered to be novel PVs. Among those identified as unlikely to be of North African origin, the BRCA1 c.68_69del and BRCA1 c.5266dupC Jewish founder alleles and PVs that have been reported as recurrent/founder variants in European populations (ex: BRCA1 c.181T>G, BRCA1 c1016dupA). The most well characterized PVs are four in BRCA1 gene [c.211dupA (14.7%), c.798_799detTT (14%), c.5266dup (8.5%), c.5309G>T (7.8%), c.3279delC (4.7%)] and one in BRCA2 [c.1310_1313detAAGA (38.9%)]. The c.211dupA and c.5309G>T PVs were identified as specific founder variants in Tunisia and Morocco, accounting for 35.2% (19/54) and 20.4% (10/49) of total established BRCA1 PVs, respectively. c.798_799delTT variant was identified in 14% (18/129) of all BRCA1 North African carriers, suggesting a founder allele. A broad spectrum of recurrent variants including BRCA1 3279delC, BRCA1 c.5266dup and BRCA2 c.1310_1313detAAGA was detected in 42 patients. BRCA1 founder variants explain around 36.4% (47/129) of BC and outnumber BRCA2 founder variants by a ratio of ≈3:1. Conclusions Testing BC and/or OC patients for the panel of specific and recurrent/founder PVs might be the most cost-effective molecular diagnosis strategy.
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Affiliation(s)
- Oubaida ElBiad
- Laboratoire de Recherche et de Biosécurité P3, Hôpital Militaire d'Instruction Mohammed V, Rabat, Maroc. .,Unité de séquençage, Laboratoire de Virologie, Centre de Virologie, des Maladies Infectieuses et Tropicales, Hôpital Militaire d'Instruction Mohammed V, Faculté de Médecine et de Pharmacie, Université Mohammed V, Rabat, Maroc. .,Laboratoire de Biodiversité, Ecologie et Génome, Faculté des Sciences, Université Mohammed V, Rabat, Maroc.
| | - Abdelilah Laraqui
- Laboratoire de Recherche et de Biosécurité P3, Hôpital Militaire d'Instruction Mohammed V, Rabat, Maroc.,Unité de séquençage, Laboratoire de Virologie, Centre de Virologie, des Maladies Infectieuses et Tropicales, Hôpital Militaire d'Instruction Mohammed V, Faculté de Médecine et de Pharmacie, Université Mohammed V, Rabat, Maroc.,Centre de virologie, des maladies infectieuses et tropicales, Hôpital militaire d'Instruction Mohammed V, Faculté de Médecine et de Pharmacie, Université Mohammed V, Rabat, Maroc
| | - Fatima El Boukhrissi
- Laboratoire de Biochimie-Toxicologie, Hôpital Militaire Moulay Ismail Meknès, Faculté de Médecine et de Pharmacie, Université Sidi Mohamed Ben Abdellah, Fès, Maroc
| | - Chaimaa Mounjid
- Laboratoire de Recherche et de Biosécurité P3, Hôpital Militaire d'Instruction Mohammed V, Rabat, Maroc
| | - Maryame Lamsisi
- Laboratoire de Virologie, Microbiologie, Qualité, Biotechnologies/Ecotoxicologie et Biodiversité, Faculté des sciences et techniques, Mohammadia, Université Hassan II, Casa, Maroc
| | - Tahar Bajjou
- Laboratoire de Recherche et de Biosécurité P3, Hôpital Militaire d'Instruction Mohammed V, Rabat, Maroc
| | - Hicham Elannaz
- Unité de séquençage, Laboratoire de Virologie, Centre de Virologie, des Maladies Infectieuses et Tropicales, Hôpital Militaire d'Instruction Mohammed V, Faculté de Médecine et de Pharmacie, Université Mohammed V, Rabat, Maroc.,Centre de virologie, des maladies infectieuses et tropicales, Hôpital militaire d'Instruction Mohammed V, Faculté de Médecine et de Pharmacie, Université Mohammed V, Rabat, Maroc
| | - Amine Idriss Lahlou
- Unité de séquençage, Laboratoire de Virologie, Centre de Virologie, des Maladies Infectieuses et Tropicales, Hôpital Militaire d'Instruction Mohammed V, Faculté de Médecine et de Pharmacie, Université Mohammed V, Rabat, Maroc.,Centre de virologie, des maladies infectieuses et tropicales, Hôpital militaire d'Instruction Mohammed V, Faculté de Médecine et de Pharmacie, Université Mohammed V, Rabat, Maroc
| | - Jaouad Kouach
- Service de Gynécologie Obstétrique, Hôpital militaire d'Instruction Mohammed V, Faculté de Médecine et de Pharmacie, Université Mohammed V, Rabat, Maroc
| | - Khadija Benchekroune
- Service de Gynécologie Obstétrique, Hôpital militaire d'Instruction Mohammed V, Faculté de Médecine et de Pharmacie, Université Mohammed V, Rabat, Maroc
| | - Mohammed Oukabli
- Laboratoire d'Anatomopathologie, Hôpital militaire d'Instruction Mohammed V, Faculté de Médecine et de Pharmacie, Université Mohammed V, Rabat, Maroc
| | - Hafsa Chahdi
- Laboratoire d'Anatomopathologie, Hôpital militaire d'Instruction Mohammed V, Faculté de Médecine et de Pharmacie, Université Mohammed V, Rabat, Maroc
| | - Moulay Mustapha Ennaji
- Laboratoire de Virologie, Microbiologie, Qualité, Biotechnologies/Ecotoxicologie et Biodiversité, Faculté des sciences et techniques, Mohammadia, Université Hassan II, Casa, Maroc
| | - Rachid Tanz
- Service d'Oncologie Médicale, Hôpital militaire d'Instruction Mohammed V, Faculté de Médecine et de Pharmacie, Université Mohammed V, Rabat, Maroc
| | - Yassir Sbitti
- Service d'Oncologie Médicale, Hôpital militaire d'Instruction Mohammed V, Faculté de Médecine et de Pharmacie, Université Mohammed V, Rabat, Maroc
| | - Mohammed Ichou
- Service d'Oncologie Médicale, Hôpital militaire d'Instruction Mohammed V, Faculté de Médecine et de Pharmacie, Université Mohammed V, Rabat, Maroc
| | - Khalid Ennibi
- Unité de séquençage, Laboratoire de Virologie, Centre de Virologie, des Maladies Infectieuses et Tropicales, Hôpital Militaire d'Instruction Mohammed V, Faculté de Médecine et de Pharmacie, Université Mohammed V, Rabat, Maroc.,Centre de virologie, des maladies infectieuses et tropicales, Hôpital militaire d'Instruction Mohammed V, Faculté de Médecine et de Pharmacie, Université Mohammed V, Rabat, Maroc
| | - Bouabid Badaoui
- Laboratoire de Biodiversité, Ecologie et Génome, Faculté des Sciences, Université Mohammed V, Rabat, Maroc
| | - Yassine Sekhsokh
- Laboratoire de Recherche et de Biosécurité P3, Hôpital Militaire d'Instruction Mohammed V, Rabat, Maroc
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Tran VT, Nguyen ST, Pham XD, Phan TH, Nguyen VC, Nguyen HT, Nguyen HP, Doan PTT, Le TA, Nguyen BT, Jasmine TX, Nguyen DS, Nguyen HDL, Nguyen NM, Do DX, Tran VU, Nguyen HHT, Le MP, Nguyen YN, Do TTT, Truong DK, Tang HS, Phan MD, Nguyen HN, Giang H, Tu LN. Pathogenic Variant Profile of Hereditary Cancer Syndromes in a Vietnamese Cohort. Front Oncol 2022; 11:789659. [PMID: 35070997 PMCID: PMC8767154 DOI: 10.3389/fonc.2021.789659] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2021] [Accepted: 12/09/2021] [Indexed: 12/30/2022] Open
Abstract
Background Hereditary cancer syndromes (HCS) are responsible for 5-10% of cancer cases. Genetic testing to identify pathogenic variants associated with cancer predisposition has not been routinely available in Vietnam. Consequently, the prevalence and genetic landscape of HCS remain unknown. Methods 1165 Vietnamese individuals enrolled in genetic testing at our laboratory in 2020. We performed analysis of germline mutations in 17 high- and moderate- penetrance genes associated with HCS by next generation sequencing. Results A total of 41 pathogenic variants in 11 genes were detected in 3.2% individuals. The carrier frequency was 4.2% in people with family or personal history of cancer and 2.6% in those without history. The percentage of mutation carriers for hereditary colorectal cancer syndromes was 1.3% and for hereditary breast and ovarian cancer syndrome was 1.6%. BRCA1 and BRCA2 mutations were the most prevalent with the positive rate of 1.3% in the general cohort and 5.1% in breast or ovarian cancer patients. Most of BRCA1 mutations located at the BRCA C-terminus domains and the top recurrent mutation was NM_007294.3:c.5251C>T (p.Arg1751Ter). One novel variant NM_000038.6(APC):c.6665C>A (p.Pro2222His) was found in a breast cancer patient with a strong family history of cancer. A case study of hereditary cancer syndrome was illustrated to highlight the importance of genetic testing. Conclusion This is the first largest analysis of carrier frequency and mutation spectrum of HCS in Vietnam. The findings demonstrate the clinical significance of multigene panel testing to identify carriers and their at-risk relatives for better cancer surveillance and management strategies.
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Affiliation(s)
| | - Sao Trung Nguyen
- University of Medicine and Pharmacy at Ho Chi Minh City, Ho Chi Minh City, Vietnam
| | | | | | | | - Huu Thinh Nguyen
- University Medical Center Ho Chi Minh City, Ho Chi Minh City, Vietnam
| | - Huu Phuc Nguyen
- University Medical Center Ho Chi Minh City, Ho Chi Minh City, Vietnam
| | - Phuong Thao Thi Doan
- University of Medicine and Pharmacy at Ho Chi Minh City, Ho Chi Minh City, Vietnam
| | | | | | | | - Duy Sinh Nguyen
- Department of Oncology, Faculty of Medicine, Nguyen Tat Thanh University, Ho Chi Minh City, Vietnam
| | - Hong-Dang Luu Nguyen
- Medical Genetics Institute, Ho Chi Minh City, Vietnam.,Gene Solutions, Ho Chi Minh City, Vietnam
| | - Ngoc Mai Nguyen
- Medical Genetics Institute, Ho Chi Minh City, Vietnam.,Gene Solutions, Ho Chi Minh City, Vietnam
| | - Duy Xuan Do
- Medical Genetics Institute, Ho Chi Minh City, Vietnam.,Gene Solutions, Ho Chi Minh City, Vietnam
| | - Vu Uyen Tran
- Medical Genetics Institute, Ho Chi Minh City, Vietnam.,Gene Solutions, Ho Chi Minh City, Vietnam
| | - Hue Hanh Thi Nguyen
- Medical Genetics Institute, Ho Chi Minh City, Vietnam.,Gene Solutions, Ho Chi Minh City, Vietnam
| | - Minh Phong Le
- Medical Genetics Institute, Ho Chi Minh City, Vietnam.,Gene Solutions, Ho Chi Minh City, Vietnam
| | - Yen Nhi Nguyen
- Medical Genetics Institute, Ho Chi Minh City, Vietnam.,Gene Solutions, Ho Chi Minh City, Vietnam
| | | | | | - Hung Sang Tang
- Medical Genetics Institute, Ho Chi Minh City, Vietnam.,Gene Solutions, Ho Chi Minh City, Vietnam
| | - Minh-Duy Phan
- Medical Genetics Institute, Ho Chi Minh City, Vietnam.,Gene Solutions, Ho Chi Minh City, Vietnam
| | - Hoai-Nghia Nguyen
- University of Medicine and Pharmacy at Ho Chi Minh City, Ho Chi Minh City, Vietnam
| | - Hoa Giang
- Medical Genetics Institute, Ho Chi Minh City, Vietnam.,Gene Solutions, Ho Chi Minh City, Vietnam
| | - Lan N Tu
- Medical Genetics Institute, Ho Chi Minh City, Vietnam.,Gene Solutions, Ho Chi Minh City, Vietnam
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30
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Kharel S, Shrestha S, Yadav S, Shakya P, Baidya S, Hirachan S. BRCA1/ BRCA2 mutation spectrum analysis in South Asia: a systematic review. J Int Med Res 2022; 50:3000605211070757. [PMID: 35000471 PMCID: PMC8753086 DOI: 10.1177/03000605211070757] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Objective Breast cancer (BC) is the most common form of cancer among Asian females. Mutations in the BRCA1/BRCA2 genes are often observed in BC cases and largely increase the lifetime risk of having BC. Because of the paucity of high-quality data on the molecular spectrum of BRCA mutations in South Asian populations, we aimed to explore these mutations among South Asian countries. Methods A systematic literature search was performed for the BRCA1 and BRCA2 gene mutation spectrum using electronic databases such as PubMed, EMBASE, and Google Scholar. Twenty studies were selected based on specific inclusion and exclusion criteria. Results The 185delAG (c.68_69del) mutation in exon 2 of BRCA1 was the most common recurrent mutation and founder mutation found. Various intronic variants, variants of unknown significance, large genomic rearrangements, and polymorphisms were also described in some studies. Conclusions The South Asian population has a wide variety of genetic mutations of BRCA1 and BRCA2 that differ according to countries and ethnicities. A stronger knowledge of various population-specific mutations in these cancer susceptibility genes can help provide efficient strategies for genetic testing.
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Affiliation(s)
- Sanjeev Kharel
- Maharajgunj Medical Campus, Institute of Medicine, Kathmandu, Nepal
| | - Suraj Shrestha
- Maharajgunj Medical Campus, Institute of Medicine, Kathmandu, Nepal
| | | | - Prafulla Shakya
- Department of Surgery, National Cancer Hospital and Research Center, Harisiddhi, Lalitpur, Nepal
| | - Sujita Baidya
- Kathmandu University School of Medical Sciences, Panauti, Nepal
| | - Suzita Hirachan
- Department of Surgery, Tribhuvan University Teaching Hospital, Kathmandu, Nepal
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31
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Mampel A, Sottile ML, Denita-Juárez SP, Vargas AL, Vargas-Roig LM. Double heterozygous pathogenic variants in the BRCA1 and BRCA2 genes in a patient with bilateral metachronous breast cancer. Cancer Genet 2022; 260-261:14-17. [PMID: 34801929 DOI: 10.1016/j.cancergen.2021.11.003] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2021] [Revised: 08/24/2021] [Accepted: 11/08/2021] [Indexed: 12/20/2022]
Abstract
Double heterozygosity pathogenic variants in BRCA1 and BRCA2 genes are a very rare finding, particularly in non-Ashkenazi individuals. We described the first case of double heterozygosity variants in a non-Ashkenazi Argentinean woman with metachronous bilateral breast cancer. The proband is a 65-year-old female diagnosed with invasive ductal carcinoma in the left breast at 45 years old and invasive carcinoma in the right breast at 65 years old. She underwent a multi-gene panel testing indicating the presence of two concurrent heterozygous germline deleterious variants NM_007300.4(BRCA1):c.4201C>T (p.Gln1401Ter), and NM_000059.3(BRCA2):c.5146_5149del (p.Tyr1716fs). . The patient's son (40 years-old) was found to have the inherited pathogenic variant in BRCA2 gene. There are few reports of double heterozygosity variants in BRCA1 and BRCA2 genes in Latin America. The two pathogenic variants identified in our patient have not been described together so far.
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Affiliation(s)
- Alejandra Mampel
- University Hospital, Mendoza, Argentina; Medical School, National University of Cuyo, Mendoza, Argentina.
| | - Mayra L Sottile
- Tumor Biology Laboratory, Institute of Medicine and Experimental Biology of Cuyo, National Research Council of Argentine-National University of Cuyo, Mendoza, Argentina; Medical School, University of Mendoza, Mendoza, Argentina
| | | | - Ana L Vargas
- University Hospital, Mendoza, Argentina; Medical School, National University of Cuyo, Mendoza, Argentina
| | - Laura M Vargas-Roig
- Medical School, National University of Cuyo, Mendoza, Argentina; Tumor Biology Laboratory, Institute of Medicine and Experimental Biology of Cuyo, National Research Council of Argentine-National University of Cuyo, Mendoza, Argentina
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Patruno M, De Summa S, Resta N, Caputo M, Costanzo S, Digennaro M, Pilato B, Bagnulo R, Pantaleo A, Simone C, Natalicchio MI, De Matteis E, Tarantino P, Tommasi S, Paradiso A. Spectrum of Germline Pathogenic Variants in BRCA1/2 Genes in the Apulian Southern Italy Population: Geographic Distribution and Evidence for Targeted Genetic Testing. Cancers (Basel) 2021; 13:cancers13184714. [PMID: 34572941 PMCID: PMC8467705 DOI: 10.3390/cancers13184714] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2021] [Revised: 09/14/2021] [Accepted: 09/17/2021] [Indexed: 01/02/2023] Open
Abstract
Simple Summary BRCA1 and BRCA2 are two major high-penetrance breast/ovarian cancer predisposition genes, whose mutations can lead to high risk and early onset of breast and ovarian cancer. Numerous studies are focused on spectrum and prevalence of BRCA1/2 mutations worldwide. This is the first study that exclusively focused on native Apulian probands. We found that ten recurrent BRCA1/2 pathogenic variants account for more than half of the patients with proven HBOC syndrome from Apulia. Besides BRCA1 c.5266dupC, which is present in significant numbers in every Apulian province, the other PVs occur at a high frequency in some areas and not others. In-depth knowledge of the mutation spectrum of the target population and of the relatively small number of recurrent mutations is crucial to develop a specific cost-effective strategy for mutation screening and a program for breast–ovarian cancer control and prevention through more liberal, yet rational, genetic testing and counseling. Abstract BRCA1/2-associated hereditary breast and ovarian cancer is the most common form of hereditary breast and ovarian cancer and occurs in all ethnicities and racial populations. Different BRCA1/BRCA2 pathogenic variants (PVs) have been reported with a wide variety among populations. In this study, we retrospectively analyzed prevalence and geographic distribution of pathogenic germline BRCA1/2 variants in families from Apulia in southern Italy and evaluated the genotype–phenotype correlations. Data were collected from Oncogenetic Services present in Apulian hospitals and a shared database was built containing Apulian native probands (n = 2026) that had undergone genetic testing from 2004 to 2019. PVs were detected in 499 of 2026 (24.6%) probands and 68.5% of them (342 of 499) were in the BRCA1 gene. We found 65 different PVs in BRCA1 and 46 in BRCA2. There were 10 most recurrent PVs and their geographical distribution appears to be significantly specific for each province. We have assumed that these PVs are related to the historical and geopolitical changes that occurred in Apulia over time and/or to a “founder effect”. Broader knowledge of BRCA1/2 prevalence and recurring PVs in specific geographic areas could help establish more flexible genetic testing strategies that may enhance our ability to detect high-risk subjects.
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Affiliation(s)
- Margherita Patruno
- Center for Hereditary Tumors Research, Istituto Tumori Bari, Giovani Paolo II, IRCCS, 70124 Bari, Italy; (S.C.); (M.D.); (A.P.)
- Correspondence: (M.P.); (S.D.S.)
| | - Simona De Summa
- Molecular and Pharmacogenetics Diagnostic Laboratory, IRCCS-IstitutoTumori “Giovanni Paolo II”, 70124 Bari, Italy; (M.C.); (B.P.); (S.T.)
- Correspondence: (M.P.); (S.D.S.)
| | - Nicoletta Resta
- Medical Genetics Unit, Department of Biomedical Sciences and Human Oncology, “Aldo Moro” University of Bari, Policlinico Hospital Bari, 70124 Bari, Italy; (N.R.); (R.B.); (A.P.); (C.S.)
| | - Mariapia Caputo
- Molecular and Pharmacogenetics Diagnostic Laboratory, IRCCS-IstitutoTumori “Giovanni Paolo II”, 70124 Bari, Italy; (M.C.); (B.P.); (S.T.)
| | - Silvia Costanzo
- Center for Hereditary Tumors Research, Istituto Tumori Bari, Giovani Paolo II, IRCCS, 70124 Bari, Italy; (S.C.); (M.D.); (A.P.)
| | - Maria Digennaro
- Center for Hereditary Tumors Research, Istituto Tumori Bari, Giovani Paolo II, IRCCS, 70124 Bari, Italy; (S.C.); (M.D.); (A.P.)
| | - Brunella Pilato
- Molecular and Pharmacogenetics Diagnostic Laboratory, IRCCS-IstitutoTumori “Giovanni Paolo II”, 70124 Bari, Italy; (M.C.); (B.P.); (S.T.)
| | - Rosanna Bagnulo
- Medical Genetics Unit, Department of Biomedical Sciences and Human Oncology, “Aldo Moro” University of Bari, Policlinico Hospital Bari, 70124 Bari, Italy; (N.R.); (R.B.); (A.P.); (C.S.)
| | - Antonino Pantaleo
- Medical Genetics Unit, Department of Biomedical Sciences and Human Oncology, “Aldo Moro” University of Bari, Policlinico Hospital Bari, 70124 Bari, Italy; (N.R.); (R.B.); (A.P.); (C.S.)
| | - Cristiano Simone
- Medical Genetics Unit, Department of Biomedical Sciences and Human Oncology, “Aldo Moro” University of Bari, Policlinico Hospital Bari, 70124 Bari, Italy; (N.R.); (R.B.); (A.P.); (C.S.)
- Medical Genetics, National Institute of Gastroenterology “S. de Bellis” Research Hospital, Castellana Grotte, 70013 Bari, Italy
| | | | | | - Paolo Tarantino
- Medical Genetics Unit, “Vito Fazzi” Hospital, 73100 Lecce, Italy;
| | - Stefania Tommasi
- Molecular and Pharmacogenetics Diagnostic Laboratory, IRCCS-IstitutoTumori “Giovanni Paolo II”, 70124 Bari, Italy; (M.C.); (B.P.); (S.T.)
| | - Angelo Paradiso
- Center for Hereditary Tumors Research, Istituto Tumori Bari, Giovani Paolo II, IRCCS, 70124 Bari, Italy; (S.C.); (M.D.); (A.P.)
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Hamdi Y, Mighri N, Boujemaa M, Mejri N, Ben Nasr S, Ben Rekaya M, Messaoud O, Bouaziz H, Berrazega Y, Rachdi H, Jaidane O, Daoud N, Zribi A, Ayari J, El Benna H, Labidi S, Ben Hassouna J, Haddaoui A, Rahal K, Benna F, Mrad R, Ben Ahmed S, Boussen H, Boubaker S, Abdelhak S. Identification of Eleven Novel BRCA Mutations in Tunisia: Impact on the Clinical Management of BRCA Related Cancers. Front Oncol 2021; 11:674965. [PMID: 34490083 PMCID: PMC8417726 DOI: 10.3389/fonc.2021.674965] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2021] [Accepted: 07/27/2021] [Indexed: 12/20/2022] Open
Abstract
Background Breast cancer is the world's most common cancer among women. It is becoming an increasingly urgent problem in low- and middle-income countries (LMICs) where a large fraction of women is diagnosed with advanced-stage disease and have no access to treatment or basic palliative care. About 5-10% of all breast cancers can be attributed to hereditary genetic components and up to 25% of familial cases are due to mutations in BRCA1/2 genes. Since their discovery in 1994 and 1995, as few as 18 mutations have been identified in BRCA genes in the Tunisian population. The aim of this study is to identify additional BRCA mutations, to estimate their contribution to the hereditary breast and ovarian cancers in Tunisia and to investigate the clinicopathological signatures associated with BRCA mutations. Methods A total of 354 patients diagnosed with breast and ovarian cancers, including 5 male breast cancer cases, have been investigated for BRCA1/2 mutations using traditional and/or next generation sequencing technologies. Clinicopathological signatures associated with BRCA mutations have also been investigated. Results In the current study, 16 distinct mutations were detected: 10 in BRCA1 and 6 in BRCA2, of which 11 are described for the first time in Tunisia including 3 variations that have not been reported previously in public databases namely BRCA1_c.915T>A; BRCA2_c.-227-?_7805+? and BRCA2_c.249delG. Early age at onset, family history of ovarian cancer and high tumor grade were significantly associated with BRCA status. BRCA1 carriers were more likely to be triple negative breast cancer compared to BRCA2 carriers. A relatively high frequency of contralateral breast cancer and ovarian cancer occurrence was observed among BRCA carriers and was more frequent in patients carrying BRCA1 mutations. Conclusion Our study provides new insights into breast and ovarian cancer genetic landscape in the under-represented North African populations. The prevalence assessment of novel and recurrent BRCA1/2 pathogenic mutations will enhance the use of personalized treatment and precise screening strategies by both affected and unaffected North African cancer cases.
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Affiliation(s)
- Yosr Hamdi
- Laboratory of Biomedical Genomics and Oncogenetics, LR20IPT05, Institut Pasteur de Tunis, University of Tunis El Manar, Tunis, Tunisia.,Laboratory of Human and Experimental Pathology, Institut Pasteur de Tunis, Tunis, Tunisia
| | - Najah Mighri
- Laboratory of Biomedical Genomics and Oncogenetics, LR20IPT05, Institut Pasteur de Tunis, University of Tunis El Manar, Tunis, Tunisia
| | - Maroua Boujemaa
- Laboratory of Biomedical Genomics and Oncogenetics, LR20IPT05, Institut Pasteur de Tunis, University of Tunis El Manar, Tunis, Tunisia
| | - Nesrine Mejri
- Laboratory of Biomedical Genomics and Oncogenetics, LR20IPT05, Institut Pasteur de Tunis, University of Tunis El Manar, Tunis, Tunisia.,Medical Oncology Department, Abderrahman Mami Hospital, Faculty of Medicine Tunis, University Tunis El Manar, Tunis, Tunisia
| | - Sonia Ben Nasr
- Laboratory of Biomedical Genomics and Oncogenetics, LR20IPT05, Institut Pasteur de Tunis, University of Tunis El Manar, Tunis, Tunisia.,Department of Medical Oncology, Military Hospital of Tunis, Tunis, Tunisia
| | - Mariem Ben Rekaya
- Laboratory of Biomedical Genomics and Oncogenetics, LR20IPT05, Institut Pasteur de Tunis, University of Tunis El Manar, Tunis, Tunisia.,UR17ES15, Oncotheranostic Biomarkers, Faculty of Medicine of Tunis, University Tunis El Manar, Tunis, Tunisia
| | - Olfa Messaoud
- Laboratory of Biomedical Genomics and Oncogenetics, LR20IPT05, Institut Pasteur de Tunis, University of Tunis El Manar, Tunis, Tunisia
| | - Hanen Bouaziz
- Laboratory of Biomedical Genomics and Oncogenetics, LR20IPT05, Institut Pasteur de Tunis, University of Tunis El Manar, Tunis, Tunisia.,Surgical Oncology Department, Salah Azaiez Institute of Cancer, Tunis, Tunisia
| | - Yosra Berrazega
- Medical Oncology Department, Abderrahman Mami Hospital, Faculty of Medicine Tunis, University Tunis El Manar, Tunis, Tunisia
| | - Haifa Rachdi
- Medical Oncology Department, Abderrahman Mami Hospital, Faculty of Medicine Tunis, University Tunis El Manar, Tunis, Tunisia
| | - Olfa Jaidane
- Surgical Oncology Department, Salah Azaiez Institute of Cancer, Tunis, Tunisia
| | - Nouha Daoud
- Medical Oncology Department, Abderrahman Mami Hospital, Faculty of Medicine Tunis, University Tunis El Manar, Tunis, Tunisia
| | - Aref Zribi
- Department of Medical Oncology, Military Hospital of Tunis, Tunis, Tunisia
| | - Jihene Ayari
- Department of Medical Oncology, Military Hospital of Tunis, Tunis, Tunisia
| | - Houda El Benna
- Laboratory of Biomedical Genomics and Oncogenetics, LR20IPT05, Institut Pasteur de Tunis, University of Tunis El Manar, Tunis, Tunisia.,Medical Oncology Department, Abderrahman Mami Hospital, Faculty of Medicine Tunis, University Tunis El Manar, Tunis, Tunisia
| | - Soumaya Labidi
- Laboratory of Biomedical Genomics and Oncogenetics, LR20IPT05, Institut Pasteur de Tunis, University of Tunis El Manar, Tunis, Tunisia.,Medical Oncology Department, Abderrahman Mami Hospital, Faculty of Medicine Tunis, University Tunis El Manar, Tunis, Tunisia
| | - Jamel Ben Hassouna
- Surgical Oncology Department, Salah Azaiez Institute of Cancer, Tunis, Tunisia
| | | | - Khaled Rahal
- Surgical Oncology Department, Salah Azaiez Institute of Cancer, Tunis, Tunisia
| | - Farouk Benna
- Department of Radiation Oncology, University of Tunis, Tunis, Tunisia
| | - Ridha Mrad
- Department of Human Genetics, Charles Nicolle Hospital, Tunis, Tunisia
| | - Slim Ben Ahmed
- Faculty of Medicine of Sousse Department of Medical Oncology Farhat Hached University Hospital University of Sousse, Sousse, Tunisia
| | - Hamouda Boussen
- Laboratory of Biomedical Genomics and Oncogenetics, LR20IPT05, Institut Pasteur de Tunis, University of Tunis El Manar, Tunis, Tunisia.,Medical Oncology Department, Abderrahman Mami Hospital, Faculty of Medicine Tunis, University Tunis El Manar, Tunis, Tunisia
| | - Samir Boubaker
- Laboratory of Biomedical Genomics and Oncogenetics, LR20IPT05, Institut Pasteur de Tunis, University of Tunis El Manar, Tunis, Tunisia.,Laboratory of Human and Experimental Pathology, Institut Pasteur de Tunis, Tunis, Tunisia
| | - Sonia Abdelhak
- Laboratory of Biomedical Genomics and Oncogenetics, LR20IPT05, Institut Pasteur de Tunis, University of Tunis El Manar, Tunis, Tunisia
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You L, Lv Z, Li C, Ye W, Zhou Y, Jin J, Han Q. Worldwide cancer statistics of adolescents and young adults in 2019: a systematic analysis of the Global Burden of Disease Study 2019. ESMO Open 2021; 6:100255. [PMID: 34481330 PMCID: PMC8417345 DOI: 10.1016/j.esmoop.2021.100255] [Citation(s) in RCA: 31] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2021] [Revised: 07/18/2021] [Accepted: 08/02/2021] [Indexed: 12/30/2022] Open
Abstract
Background The cancer burden in adolescents and young adults (AYAs) deserves more attention. However, global cancer statistics for AYAs are often presented as aggregates, concealing important heterogeneity. This study aimed to describe the worldwide profile of cancer incidence, mortality, and corresponding trends from 1990 to 2019 among 15-39-year olds by focusing on the patterns by age, sex, sociodemographic index (SDI), and regions. Patients and methods Global, regional, and country data on the number of cancer cases and cancer-related deaths for 29 cancer types were collected from the 2019 Global Burden of Disease (GBD) Study. We also summarized the results using five levels of the SDI and 21 GBD regions. Results In 2019, an estimated 1 335 100 new cancer cases and 397 583 cancer-related deaths occurred among AYAs worldwide. While the incidence rate increased mildly, the death rate decreased significantly between 1990 and 2019, with an estimated annual percentage change of 0.38 (95% confidence interval 0.36-0.39) and −0.93 (95% confidence interval −0.95 to −0.92), respectively. The cancer burden was disproportionally greater among women than among men. The cancer profiles varied substantially across geographical regions, with the highest burden being in South Asia and East Asia. Besides, the cancer incidence in the high SDI regions was four times higher than that in the low SDI regions; however, the mortality burden in the high SDI region was lower than that in the low SDI region, which reflected the differences in cancer profiles across SDI regions and the inferior outcomes in the low SDI regions. Conclusion This study updates the previous epidemiological data of the cancer burden of AYAs. The cancer burden in AYAs varied substantially according to age, sex, SDI, and geographical regions. These findings highlight that the specific cancer profile of AYA patients requires targeted cancer control measures to reduce the cancer burden in this age group. The cancer burden in AYAs varied substantially according to age, sex, SDI, and geographical regions. Cancer burden in AYAs was disproportionally greater among women than among men. Cancer profiles of AYAs varied across different geographical regions and SDI regions. Cancer burden in AYAs was still considerable in the low SDI regions.
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Affiliation(s)
- L You
- Department of Hematology, The First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, Zhejiang, People's Republic of China; Zhejiang Province Key Laboratory of Hematology Oncology Diagnosis and Treatment, Hangzhou, Zhejiang, People's Republic of China
| | - Z Lv
- Xinyuan Institute of Medicine and Biotechnology, School of Life Sciences and Medicine, Zhejiang Sci-Tech University, Hangzhou, People's Republic of China
| | - C Li
- Department of Hematology, The First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, Zhejiang, People's Republic of China; Zhejiang Province Key Laboratory of Hematology Oncology Diagnosis and Treatment, Hangzhou, Zhejiang, People's Republic of China
| | - W Ye
- Department of Hematology, The First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, Zhejiang, People's Republic of China; Zhejiang Province Key Laboratory of Hematology Oncology Diagnosis and Treatment, Hangzhou, Zhejiang, People's Republic of China
| | - Y Zhou
- Department of Hematology, The First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, Zhejiang, People's Republic of China; Zhejiang Province Key Laboratory of Hematology Oncology Diagnosis and Treatment, Hangzhou, Zhejiang, People's Republic of China
| | - J Jin
- Department of Hematology, The First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, Zhejiang, People's Republic of China; Zhejiang Province Key Laboratory of Hematology Oncology Diagnosis and Treatment, Hangzhou, Zhejiang, People's Republic of China.
| | - Q Han
- Department of Hematology, The First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, Zhejiang, People's Republic of China; Department of Pathology, The First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, Zhejiang, People's Republic of China.
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Gorodetska I, Inomistova M, Khranovska N, Skachkova O, Michailovich Y, Rybchenko L, Bychkova A, Stefanovich A, Klimuk B, Poluben L, Klymenko S, Rossokha Z, Kyriachenko S, Popova O, Gorovenko N, Ponomarova O, Serga S, Kozeretska I. The reduction of two BRCA1 gene mutations frequencies in ovarian cancer patients from Ukraine. Meta Gene 2021. [DOI: 10.1016/j.mgene.2021.100900] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022] Open
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Abdel-Razeq H, Abujamous L, Abunasser M, Edaily S, Bater R. Prevalence and predictors of germline BRCA1 and BRCA2 mutations among young patients with breast cancer in Jordan. Sci Rep 2021; 11:14906. [PMID: 34290354 PMCID: PMC8295261 DOI: 10.1038/s41598-021-94403-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2020] [Accepted: 06/24/2021] [Indexed: 11/09/2022] Open
Abstract
BRCA1 and BRCA2 mutations are not uncommon in breast cancer patients. Western studies show that such mutations are more prevalent among younger patients. This study evaluates the prevalence of germline mutations in BRCA1 and BRCA2 among breast cancer patients diagnosed at age 40 or younger in Jordan. Blood samples of patients with breast cancer diagnosed at age 40 years or younger were obtained for DNA extraction and BRCA sequencing. Mutations were classified as benign/likely benign (non-carrier), pathogenic/likely pathogenic variant (carrier) and variant of uncertain significance (VUS). Genetic testing and counseling were completed on 616 eligible patients. Among the whole group, 75 (12.2%) had pathogenic or likely pathogenic variants; two of the BRCA2 mutations were novel. In multivariate analysis, triple-negative disease (Odd Ratio [OR]: 5.37; 95% CI 2.88-10.02, P < 0.0001), breast cancer in ≥ 2 family members (OR: 4.44; 95% CI 2.52-7.84, P < 0.0001), and a personal history ≥ 2 primary breast cancers (OR: 3.43; 95% CI 1.62-7.24, P = 0.001) were associated with higher mutation rates. In conclusion, among young Jordanian patients with breast cancer, mutation rates are significantly higher in patients with triple-negative disease, personal history of breast cancer and those with two or more close relatives with breast cancer.
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Affiliation(s)
- Hikmat Abdel-Razeq
- Department of Internal Medicine, King Hussein Cancer Center, Queen Rania Al Abdullah Street, P.O. Box: 1269, Amman, 11941, Jordan.
- School of Medicine, University of Jordan, Amman, Jordan.
| | - Lama Abujamous
- Department of Cell Therapy & Applied Genomic, King Hussein Cancer Center, Amman, Jordan
| | - Mahmoud Abunasser
- Department of Internal Medicine, King Hussein Cancer Center, Queen Rania Al Abdullah Street, P.O. Box: 1269, Amman, 11941, Jordan
| | - Sara Edaily
- Department of Internal Medicine, King Hussein Cancer Center, Queen Rania Al Abdullah Street, P.O. Box: 1269, Amman, 11941, Jordan
| | - Rayan Bater
- Department of Internal Medicine, King Hussein Cancer Center, Queen Rania Al Abdullah Street, P.O. Box: 1269, Amman, 11941, Jordan
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Majumder MA, Blank ML, Geary J, Bollinger JM, Guerrini CJ, Robinson JO, Canfield I, Cook-Deegan R, McGuire AL. Challenges to Building a Gene Variant Commons to Assess Hereditary Cancer Risk: Results of a Modified Policy Delphi Panel Deliberation. J Pers Med 2021; 11:646. [PMID: 34357113 PMCID: PMC8305920 DOI: 10.3390/jpm11070646] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2021] [Revised: 06/07/2021] [Accepted: 07/03/2021] [Indexed: 11/25/2022] Open
Abstract
Understanding the clinical significance of variants associated with hereditary cancer risk requires access to a pooled data resource or network of resources-a "cancer gene variant commons"-incorporating representative, well-characterized genetic data, metadata, and, for some purposes, pathways to case-level data. Several initiatives have invested significant resources into collecting and sharing cancer gene variant data, but further progress hinges on identifying and addressing unresolved policy issues. This commentary provides insights from a modified policy Delphi process involving experts from a range of stakeholder groups involved in the data-sharing ecosystem. In particular, we describe policy issues and options generated by Delphi participants in five domains critical to the development of an effective cancer gene variant commons: incentives, financial sustainability, privacy and security, equity, and data quality. Our intention is to stimulate wider discussion and lay a foundation for further work evaluating policy options more in-depth and mapping them to those who have the power to bring about change. Addressing issues in these five domains will contribute to a cancer gene variant commons that supports better care for at-risk and affected patients, empowers patient communities, and advances research on hereditary cancers.
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Affiliation(s)
- Mary A. Majumder
- Center for Medical Ethics and Health Policy, Baylor College of Medicine, One Baylor Plaza, Houston, TX 77005, USA; (M.L.B.); (J.M.B.); (C.J.G.); (J.O.R.); (A.L.M.)
| | - Matthew L. Blank
- Center for Medical Ethics and Health Policy, Baylor College of Medicine, One Baylor Plaza, Houston, TX 77005, USA; (M.L.B.); (J.M.B.); (C.J.G.); (J.O.R.); (A.L.M.)
| | - Janis Geary
- School for the Future of Innovation in Society and Consortium for Science, Policy & Outcomes, Arizona State University Barrett & O’Connor Washington Center, 1800 I (Eye) Street, NW, Washington, DC 20006, USA; (J.G.); (R.C.-D.)
| | - Juli M. Bollinger
- Center for Medical Ethics and Health Policy, Baylor College of Medicine, One Baylor Plaza, Houston, TX 77005, USA; (M.L.B.); (J.M.B.); (C.J.G.); (J.O.R.); (A.L.M.)
- Johns Hopkins Berman Institute of Bioethics, Deering Hall, 1809 Ashland Ave, Baltimore, MD 21205, USA
| | - Christi J. Guerrini
- Center for Medical Ethics and Health Policy, Baylor College of Medicine, One Baylor Plaza, Houston, TX 77005, USA; (M.L.B.); (J.M.B.); (C.J.G.); (J.O.R.); (A.L.M.)
| | - Jill Oliver Robinson
- Center for Medical Ethics and Health Policy, Baylor College of Medicine, One Baylor Plaza, Houston, TX 77005, USA; (M.L.B.); (J.M.B.); (C.J.G.); (J.O.R.); (A.L.M.)
| | - Isabel Canfield
- Department of Philosophy, University of Notre Dame, Malloy Hall, Notre Dame, IN 46556, USA;
| | - Robert Cook-Deegan
- School for the Future of Innovation in Society and Consortium for Science, Policy & Outcomes, Arizona State University Barrett & O’Connor Washington Center, 1800 I (Eye) Street, NW, Washington, DC 20006, USA; (J.G.); (R.C.-D.)
| | - Amy L. McGuire
- Center for Medical Ethics and Health Policy, Baylor College of Medicine, One Baylor Plaza, Houston, TX 77005, USA; (M.L.B.); (J.M.B.); (C.J.G.); (J.O.R.); (A.L.M.)
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Combrink HM, Oosthuizen J, Visser B, Chabilal N, Buccimazza I, Foulkes WD, van der Merwe NC. Mutations in BRCA-related breast and ovarian cancer in the South African Indian population: A descriptive study. Cancer Genet 2021; 258-259:1-6. [PMID: 34218100 DOI: 10.1016/j.cancergen.2021.06.002] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2019] [Revised: 02/07/2021] [Accepted: 06/06/2021] [Indexed: 10/21/2022]
Abstract
Knowledge of the genetic landscape of a specific population group is vital for population-specific diagnosis and treatment of familial breast cancer. Although BRCA-related diagnostic testing has long been implemented in South Africa, the genotyping approach previously failed for the SA Indian population as it was based on other SA population groups. Because this population is uniquely admixed, the lack of population-specific data resulted in the implementation of comprehensive mutation screens for BRCA1/2. A total of 223 female patients were screened for clinically actionable variants. High-resolution melting analysis (HRMA) was used to screen 88 patients for DNA alterations in the coding and splice site boundaries of BRCA1 exons 2-9, BRCA1 exons 11-23, BRCA2 exons 2-9 and BRCA2 exons 12-27. The protein truncation test (PTT) was used to screen the three larger exons (BRCA1 exon 10 and BRCA2 exons 10 and 11) for protein termination changes. Multiplex ligation-dependent probe amplification (MLPA) was used to determine the presence of larger indels and possible copy number differences. Next Generation Sequencing (NGS) was performed on the remaining 135 samples. All potential variants were confirmed by performing Sanger DNA sequencing. The search revealed 28 different pathogenic heterozygotic variants, together with nine variants of unknown significance (VUS). The results suggested that the SA Indian population represents a different genetic admixture compared to that of mainland India, as only five pathogenic variants corresponded to those reported for mainland India. Familial breast cancer testing for SA Indian patients should therefore be performed as comprehensively as possible as the pathogenic variants seem to be family- rather than population-specific. Furthermore, predictive testing of family members will contribute to relieve the financial burden on the country's healthcare system, as increased surveillance and appropriate management could prevent disease.
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Affiliation(s)
- Herkulaas Mve Combrink
- Division of Human Genetics, Faculty of Health Sciences, University of the Free State, Bloemfontein, South Africa; Division of Human Genetics, National Health Laboratory Services, Universitas Hospital, Bloemfontein, South Africa.
| | - Jaco Oosthuizen
- Division of Human Genetics, Faculty of Health Sciences, University of the Free State, Bloemfontein, South Africa; Division of Human Genetics, National Health Laboratory Services, Universitas Hospital, Bloemfontein, South Africa
| | - Botma Visser
- Department of Plant Sciences, Faculty of Natural and Agricultural Sciences, University of the Free State, Bloemfontein, South Africa
| | - Namitha Chabilal
- Genetics Unit, Inkosi Albert Luthuli General Hospital, Durban, South Africa
| | - Ines Buccimazza
- Department of Surgery, Faculty of Medicine, Inkosi Albert Luthuli General Hospital, Durban, South Africa
| | - William D Foulkes
- Lady Davis Institute and Segal Cancer Centre, Jewish General Hospital, Montréal, QC, Canada; Research Institute of the McGill University Health Centre, Montréal, QC, Canada; Program in Cancer Genetics, Departments of Oncology and Human Genetics, McGill University, Montréal, QC, Canada
| | - Nerina C van der Merwe
- Division of Human Genetics, Faculty of Health Sciences, University of the Free State, Bloemfontein, South Africa; Division of Human Genetics, National Health Laboratory Services, Universitas Hospital, Bloemfontein, South Africa
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A clinical case of diagnosis of breast cancer in patients with family history of BRCA mutations 1. REPORTS OF PRACTICAL ONCOLOGY AND RADIOTHERAPY : JOURNAL OF GREATPOLAND CANCER CENTER IN POZNAN AND POLISH SOCIETY OF RADIATION ONCOLOGY 2021; 26:463-469. [PMID: 34277102 PMCID: PMC8281913 DOI: 10.5603/rpor.a2021.0069] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/31/2020] [Accepted: 02/25/2021] [Indexed: 11/29/2022]
Abstract
Background The incidence of breast cancer is growing rapidly worldwide (1.7 million new cases and 600,000 deaths per year). Moreover, about 10% of breast cancer cases occur in young women under the age of 45. The aim of the study was to report a rare case of BRCA 1-mutated breast cancer in a young patient with multiple affected relatives. Breast cancer is due to a genetic predisposition with BRCA1 and BRCA2 representing a significant proportion of families with a very high risk of developing the disease over a lifetime of up to 50–80%. Case presentation In this paper we report a case of a 29-year-old woman with a confirmed diagnosis of left breast carcinoma. Conclusions Mutations of the BRCA1 gene were revealed in the patient, in two of her sisters, brother and brother’s daughter.
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40
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Doddato G, Valentino F, Giliberti A, Papa FT, Tita R, Bruno LP, Resciniti S, Fallerini C, Benetti E, Palmieri M, Mencarelli MA, Fabbiani A, Bruttini M, Orrico A, Baldassarri M, Fava F, Lopergolo D, Lo Rizzo C, Lamacchia V, Mannucci S, Pinto AM, Currò A, Mancini V, Mari F, Renieri A, Ariani F. Exome sequencing in BRCA1-2 candidate familias: the contribution of other cancer susceptibility genes. Front Oncol 2021; 11:649435. [PMID: 34026625 PMCID: PMC8139251 DOI: 10.3389/fonc.2021.649435] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2021] [Accepted: 04/06/2021] [Indexed: 12/14/2022] Open
Abstract
Hereditary Breast and Ovarian Cancer (HBOC) syndrome is a condition in which the risk of breast and ovarian cancer is higher than in the general population. The prevalent pathogenesis is attributable to inactivating variants of the BRCA1-2 highly penetrant genes, however, other cancer susceptibility genes may also be involved. By Exome Sequencing (WES) we analyzed a series of 200 individuals selected for genetic testing in BRCA1-2 genes according to the updated National Comprehensive Cancer Network (NCCN) guidelines. Analysis by MLPA was performed to detect large BRCA1-2 deletions/duplications. Focusing on BRCA1-2 genes, data analysis identified 11 cases with pathogenic variants (4 in BRCA1 and 7 in BRCA1-2) and 12 with uncertain variants (7 in BRCA1 and 5 in BRCA2). Only one case was found with a large BRCA1 deletion. Whole exome analysis allowed to characterize pathogenic variants in 21 additional genes: 10 genes more traditionally associated to breast and ovarian cancer (ATM, BRIP1, CDH1, PALB2, PTEN, RAD51C, and TP53) (5% diagnostic yield) and 11 in candidate cancer susceptibility genes (DPYD, ERBB3, ERCC2, MUTYH, NQO2, NTHL1, PARK2, RAD54L, and RNASEL). In conclusion, this study allowed a personalized risk assessment and clinical surveillance in an increased number of HBOC families and to broaden the spectrum of causative variants also to candidate non-canonical genes.
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Affiliation(s)
- Gabriella Doddato
- Medical Genetics, University of Siena, Siena, Italy
- Med Biotech Hub and Competence Center, Department of Medical Biotechnologies, University of Siena, Siena, Italy
| | - Floriana Valentino
- Medical Genetics, University of Siena, Siena, Italy
- Med Biotech Hub and Competence Center, Department of Medical Biotechnologies, University of Siena, Siena, Italy
| | - Annarita Giliberti
- Medical Genetics, University of Siena, Siena, Italy
- Med Biotech Hub and Competence Center, Department of Medical Biotechnologies, University of Siena, Siena, Italy
| | - Filomena Tiziana Papa
- Medical Genetics, University of Siena, Siena, Italy
- Med Biotech Hub and Competence Center, Department of Medical Biotechnologies, University of Siena, Siena, Italy
| | - Rossella Tita
- Genetica Medica, Azienda Ospedaliera Universitaria Senese, Siena, Italy
| | - Lucia Pia Bruno
- Medical Genetics, University of Siena, Siena, Italy
- Med Biotech Hub and Competence Center, Department of Medical Biotechnologies, University of Siena, Siena, Italy
| | - Sara Resciniti
- Medical Genetics, University of Siena, Siena, Italy
- Med Biotech Hub and Competence Center, Department of Medical Biotechnologies, University of Siena, Siena, Italy
| | - Chiara Fallerini
- Medical Genetics, University of Siena, Siena, Italy
- Med Biotech Hub and Competence Center, Department of Medical Biotechnologies, University of Siena, Siena, Italy
| | - Elisa Benetti
- Med Biotech Hub and Competence Center, Department of Medical Biotechnologies, University of Siena, Siena, Italy
| | - Maria Palmieri
- Medical Genetics, University of Siena, Siena, Italy
- Med Biotech Hub and Competence Center, Department of Medical Biotechnologies, University of Siena, Siena, Italy
| | | | - Alessandra Fabbiani
- Medical Genetics, University of Siena, Siena, Italy
- Med Biotech Hub and Competence Center, Department of Medical Biotechnologies, University of Siena, Siena, Italy
- Genetica Medica, Azienda Ospedaliera Universitaria Senese, Siena, Italy
| | - Mirella Bruttini
- Medical Genetics, University of Siena, Siena, Italy
- Genetica Medica, Azienda Ospedaliera Universitaria Senese, Siena, Italy
| | - Alfredo Orrico
- Molecular Diagnosis and Characterization of Pathogenic Mechanisms of Rare Genetic Diseases, Azienda Ospedaliera Universitaria Senese and Clinical Genetics, ASL Toscana SudEst. Ospedale della Misericordia, Grosseto, Italy
| | - Margherita Baldassarri
- Medical Genetics, University of Siena, Siena, Italy
- Med Biotech Hub and Competence Center, Department of Medical Biotechnologies, University of Siena, Siena, Italy
| | - Francesca Fava
- Medical Genetics, University of Siena, Siena, Italy
- Med Biotech Hub and Competence Center, Department of Medical Biotechnologies, University of Siena, Siena, Italy
- Genetica Medica, Azienda Ospedaliera Universitaria Senese, Siena, Italy
| | - Diego Lopergolo
- Medical Genetics, University of Siena, Siena, Italy
- Med Biotech Hub and Competence Center, Department of Medical Biotechnologies, University of Siena, Siena, Italy
- Genetica Medica, Azienda Ospedaliera Universitaria Senese, Siena, Italy
| | - Caterina Lo Rizzo
- Genetica Medica, Azienda Ospedaliera Universitaria Senese, Siena, Italy
| | - Vittoria Lamacchia
- Medical Genetics, University of Siena, Siena, Italy
- Med Biotech Hub and Competence Center, Department of Medical Biotechnologies, University of Siena, Siena, Italy
- Genetica Medica, Azienda Ospedaliera Universitaria Senese, Siena, Italy
| | - Sara Mannucci
- Medical Genetics, University of Siena, Siena, Italy
- Med Biotech Hub and Competence Center, Department of Medical Biotechnologies, University of Siena, Siena, Italy
- Genetica Medica, Azienda Ospedaliera Universitaria Senese, Siena, Italy
| | - Anna Maria Pinto
- Genetica Medica, Azienda Ospedaliera Universitaria Senese, Siena, Italy
| | - Aurora Currò
- Medical Genetics, University of Siena, Siena, Italy
- Med Biotech Hub and Competence Center, Department of Medical Biotechnologies, University of Siena, Siena, Italy
- Genetica Medica, Azienda Ospedaliera Universitaria Senese, Siena, Italy
| | - Virginia Mancini
- Unit of Pathology, Department of Medical Biotechnology, University of Siena, Siena, Italy
| | - Francesca Mari
- Medical Genetics, University of Siena, Siena, Italy
- Med Biotech Hub and Competence Center, Department of Medical Biotechnologies, University of Siena, Siena, Italy
- Genetica Medica, Azienda Ospedaliera Universitaria Senese, Siena, Italy
| | - Alessandra Renieri
- Medical Genetics, University of Siena, Siena, Italy
- Med Biotech Hub and Competence Center, Department of Medical Biotechnologies, University of Siena, Siena, Italy
- Genetica Medica, Azienda Ospedaliera Universitaria Senese, Siena, Italy
| | - Francesca Ariani
- Medical Genetics, University of Siena, Siena, Italy
- Med Biotech Hub and Competence Center, Department of Medical Biotechnologies, University of Siena, Siena, Italy
- Genetica Medica, Azienda Ospedaliera Universitaria Senese, Siena, Italy
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Rosen MN, Goodwin RA, Vickers MM. BRCA mutated pancreatic cancer: A change is coming. World J Gastroenterol 2021; 27:1943-1958. [PMID: 34007132 PMCID: PMC8108028 DOI: 10.3748/wjg.v27.i17.1943] [Citation(s) in RCA: 39] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/25/2021] [Revised: 03/04/2021] [Accepted: 04/13/2021] [Indexed: 02/06/2023] Open
Abstract
Pancreatic cancer remains a leading cause of cancer-related death with few available therapies for advanced disease. Recently, patients with germline BRCA mutations have received increased attention due to advances in the management of BRCA mutated ovarian and breast tumors. Germline BRCA mutations significantly increase risk of developing pancreatic cancer and can be found in up to 8% of patients with sporadic pancreatic cancer. In patients with germline BRCA mutations, platinum-based chemotherapies and poly (ADP-ribose) polymerase inhibitors are effective treatment options which may offer survival benefits. This review will focus on the molecular biology, epidemiology, and management of BRCA-mutated pancreatic cancer. Furthermore, we will discuss future directions for this area of research and promising active areas of research.
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Affiliation(s)
- Michael N Rosen
- Faculty of Medicine, The University of Ottawa, Ottawa K1H 8L6, Ontario, Canada
| | - Rachel A Goodwin
- Faculty of Medicine, The University of Ottawa, Ottawa K1H 8L6, Ontario, Canada
| | - Michael M Vickers
- The Ottawa Hospital Cancer Center, The University of Ottawa, Ottawa K1H 8L6, Ontario, Canada
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BRCA1/2 Mutation Detection in the Tumor Tissue from Selected Polish Patients with Breast Cancer Using Next Generation Sequencing. Genes (Basel) 2021; 12:genes12040519. [PMID: 33918338 PMCID: PMC8065856 DOI: 10.3390/genes12040519] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2021] [Revised: 03/30/2021] [Accepted: 03/30/2021] [Indexed: 12/24/2022] Open
Abstract
(1) Background: Although, in the mutated BRCA detected in the Polish population of patients with breast cancer, there is a large percentage of recurrent pathogenic variants, an increasing need for the assessment of rare BRCA1/2 variants using NGS can be observed. (2) Methods: We studied 75 selected patients with breast cancer (negative for the presence of 5 mutations tested in the Polish population in the prophylactic National Cancer Control Program). DNA extracted from the cancer tissue of these patients was used to prepare a library and to sequence all coding regions of the BRCA1/2 genes. (3) Results: We detected nine pathogenic variants in 8 out of 75 selected patients (10.7%). We identified one somatic and eight germline variants. We also used different bioinformatic NGS software programs to analyze NGS FASTQ files and established that tertiary analysis performed with different tools was more likely to give the same outcome if we analyzed files received from secondary analysis using the same method. (4) Conclusions: Our study emphasizes (i) the importance of an NGS validation process with a bioinformatic procedure included; (ii) the importance of screening both somatic and germline pathogenic variants; (iii) the urgent need to identify additional susceptible genes in order to explain the high percentage of non-BRCA-related hereditary cases of breast cancer.
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Majidzadeh-A K, Zarinfam S, Abdoli N, Yadegari F, Esmaeili R, Farahmand L, Teimourzadeh A, Taghizadeh M, Salehi M, Zamani M. A comprehensive reference for BRCA1/2 genes pathogenic variants in Iran: published, unpublished and novel. Fam Cancer 2021; 21:137-142. [PMID: 33754277 DOI: 10.1007/s10689-021-00242-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2020] [Accepted: 03/04/2021] [Indexed: 11/27/2022]
Abstract
BRCA1 and BRCA2 are two prominent genes that account for about 20-40% of inherited breast cancer. Mutations in these genes are often associated with clustering of especially early-onset cancers in the family. The spectrum of BRCA variants showed a significant difference between geographic regions and ethnicities. The frequency and spectrum of BRCA mutations in Iran, a country in southwest Asia, have not yet been thoroughly studied. Here, for the first time, all published and not published BRCA pathogenic variants are presented. Among 1040 high risk families (1258 cases) which were detected, 116 families were found to carry pathogenic variants in either BRCA1 or BRCA2. Altogether 89 distinct types of pathogenic variants have been detected in Iran, including 41 in BRCA1 and 48 in BRCA2. 16 out of 89 mutations had not been previously reported in Iran and are presented for the first time in this article, among which 4 mutations are novel worldwide. 20% of families had one of the seven most commonly observed mutations, including c.81-1G > C, c.66_67delAG, c.4609C>T, c.1568delT, c.1961delA, in BRCA1 and: c.3751_3752insA, c.8585dupT in BRCA2. Combining the data from published articles and our study which has not been published before, a comprehensive table is created as a reference for entire BRCA pathogenic variants and their frequencies in Iran.
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Affiliation(s)
- Keivan Majidzadeh-A
- Genetics Department, Breast Cancer Research Center, Motamed Cancer Institute, ACECR, No 146, South Gandhi Ave, Vanak Sq., P.O.BOX: 1517964311, Tehran, Iran.
| | - Shiva Zarinfam
- Genetics Department, Breast Cancer Research Center, Motamed Cancer Institute, ACECR, No 146, South Gandhi Ave, Vanak Sq., P.O.BOX: 1517964311, Tehran, Iran
| | - Nasrin Abdoli
- Genetics Department, Breast Cancer Research Center, Motamed Cancer Institute, ACECR, No 146, South Gandhi Ave, Vanak Sq., P.O.BOX: 1517964311, Tehran, Iran
| | - Fatemeh Yadegari
- Genetics Department, Breast Cancer Research Center, Motamed Cancer Institute, ACECR, No 146, South Gandhi Ave, Vanak Sq., P.O.BOX: 1517964311, Tehran, Iran
| | - Rezvan Esmaeili
- Genetics Department, Breast Cancer Research Center, Motamed Cancer Institute, ACECR, No 146, South Gandhi Ave, Vanak Sq., P.O.BOX: 1517964311, Tehran, Iran
| | - Leila Farahmand
- Recombinant Proteins Department, Breast Cancer Research Center, Motamed Cancer Institute, ACECR, Tehran, Iran
| | - Azin Teimourzadeh
- Genetics Department, Breast Cancer Research Center, Motamed Cancer Institute, ACECR, No 146, South Gandhi Ave, Vanak Sq., P.O.BOX: 1517964311, Tehran, Iran
| | - Mahdieh Taghizadeh
- Department of Medical Genetics, Tarbiat Modares University, Tehran, Iran
| | - Mansoor Salehi
- Department of Genetics and Molecular Biology, Medical School, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Mohamad Zamani
- Genetics Department, Breast Cancer Research Center, Motamed Cancer Institute, ACECR, No 146, South Gandhi Ave, Vanak Sq., P.O.BOX: 1517964311, Tehran, Iran
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Tariq H, Gul A, Khadim T, Ud-Din H, Tipu HN, Asif M, Ahmed R. Next Generation Sequencing-Based Germline Panel Testing for Breast and Ovarian Cancers in Pakistan. Asian Pac J Cancer Prev 2021; 22:719-724. [PMID: 33773534 PMCID: PMC8286662 DOI: 10.31557/apjcp.2021.22.3.719] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2020] [Indexed: 12/16/2022] Open
Abstract
Background: Pathogenic germline mutations in BRCA1/2 constitute the majority of hereditary breast and/or ovarian cancers worldwide. Incidence and mortality rate of breast and ovarian cancers in Pakistani women is high. Thus, to establish the diagnosis for targeted therapy in Pakistan, we conducted Next-generation sequencing-based germline testing for the detection of BRCA1/2 oncogenic variants associated with breast and ovarian cancer subtype. Methods: Peripheral blood of 24 women, diagnosed with breast and epithelial ovarian cancers, was taken from the recruited cases with the consent of performing germline genetic testing. DNA was isolated from the peripheral blood and subjected to indexed BRCA Panel libraries. Targeted NGS was performed for all coding regions and splicing sites of BRCA1 and BRCA2 genes using AmpliSeq for Illumina BRCA Panel and Illumina MiSeq sequencer (placed at AFIP). Analysis of the sequencing results has been done by using Illumina bioinformatics tools. Results: We detected 421 variants having a quality score of 100 in all cases under study. The list of identified variants in BRCA1 and BRCA2 genes was narrowed down after filtering out those which did not pass q30 and those with a minor allele frequency (MAF) > 0.05 based on gnomAD browser. To classify these variants, clinical significance was predicted using external curated databases. As a result, we interpreted (n = 4) 16.7% pathogenic variants in BRCA1 and (n = 6) 25% variants of uncertain significance (VUS) in both genes. Descriptive statistics depicted that the age and BMI of BRCA positive cases are less than BRCA negative cases. Conclusion: Our findings exhibit an initial report for the NGS based cancer genetic testing in Pakistan. This will enable us to pursue screening and diagnosis of hereditary BRCA mutation utilizing the latest state-of-the-art technique locally available in Pakistan ultimately resulting in targeted cancer therapy.
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Affiliation(s)
- Hassan Tariq
- Department of Histopathology, Armed Forces Institute of Pathology, Rawalpindi, Pakistan
| | - Asma Gul
- Department of Histopathology, Armed Forces Institute of Pathology, Rawalpindi, Pakistan
| | - Tahir Khadim
- Department of Histopathology, Armed Forces Institute of Pathology, Rawalpindi, Pakistan
| | - Hafeez Ud-Din
- Department of Histopathology, Armed Forces Institute of Pathology, Rawalpindi, Pakistan
| | - Hamid Nawaz Tipu
- Department of Immunology, Armed Forces Institute of Pathology, Rawalpindi, Pakistan
| | - Muhammad Asif
- Department of Histopathology, Armed Forces Institute of Pathology, Rawalpindi, Pakistan
| | - Rabia Ahmed
- Department of Histopathology, PNS Shifa Hospital, Karachi, Pakistan
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Jain A, Sharma D, Bajaj A, Gupta V, Scaria V. Founder variants and population genomes-Toward precision medicine. ADVANCES IN GENETICS 2021; 107:121-152. [PMID: 33641745 DOI: 10.1016/bs.adgen.2020.11.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Human migration and community specific cultural practices have contributed to founder events and enrichment of the variants associated with genetic diseases. While many founder events in isolated populations have remained uncharacterized, the application of genomics in clinical settings as well as for population scale studies in the recent years have provided an unprecedented push towards identification of founder variants associated with human health and disease. The discovery and characterization of founder variants could have far reaching implications not only in understanding the history or genealogy of the disease, but also in implementing evidence based policies and genetic testing frameworks. This further enables precise diagnosis and prevention in an attempt towards precision medicine. This review provides an overview of founder variants along with methods and resources cataloging them. We have also discussed the public health implications and examples of prevalent disease associated founder variants in specific populations.
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Affiliation(s)
- Abhinav Jain
- CSIR-Institute of Genomics and Integrative Biology, New Delhi, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, Uttar Pradesh, India
| | - Disha Sharma
- CSIR-Institute of Genomics and Integrative Biology, New Delhi, India
| | - Anjali Bajaj
- CSIR-Institute of Genomics and Integrative Biology, New Delhi, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, Uttar Pradesh, India
| | - Vishu Gupta
- CSIR-Institute of Genomics and Integrative Biology, New Delhi, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, Uttar Pradesh, India
| | - Vinod Scaria
- CSIR-Institute of Genomics and Integrative Biology, New Delhi, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, Uttar Pradesh, India.
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Analysis of Italian BRCA1/2 Pathogenic Variants Identifies a Private Spectrum in the Population from the Bergamo Province in Northern Italy. Cancers (Basel) 2021; 13:cancers13030532. [PMID: 33573335 PMCID: PMC7866799 DOI: 10.3390/cancers13030532] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2020] [Revised: 01/11/2021] [Accepted: 01/26/2021] [Indexed: 12/13/2022] Open
Abstract
Simple Summary The Italian population is characterized by a high genetic heterogeneity mostly due to its long history of migration and colonization and to its geographical conformation. Consistently, several BRCA1/2 pathogenic variants (PVs) have been reported to be recurrent or even founder in defined geographical areas including the Bergamo province in Northern Italy. In this study, we retrospectively analyzed the data from 1019 women affected with breast cancer with BRCA1/2 PVs. We compared the BRCA1/2 PVs spectrum found in the carrier individuals from the Bergamo province (BGP) with that of the general Italian population. We found that the majority of the BGP PVs had a local origin and remained confined to the BGP or to the surrounding Lombardy region. We also observed that the BGP BRCA1/2 PV spectrum is private and conserved comprising a smaller number of variants with an average higher frequency with respect to that of carrier individuals from the rest of Italy. Abstract Germline pathogenic variants (PVs) in the BRCA1 or BRCA2 genes cause high breast cancer risk. Recurrent or founder PVs have been described worldwide including some in the Bergamo province in Northern Italy. The aim of this study was to compare the BRCA1/2 PV spectra of the Bergamo and of the general Italian populations. We retrospectively identified at five Italian centers 1019 BRCA1/2 PVs carrier individuals affected with breast cancer and representative of the heterogeneous national population. Each individual was assigned to the Bergamo or non-Bergamo cohort based on self-reported birthplace. Our data indicate that the Bergamo BRCA1/2 PV spectrum shows less heterogeneity with fewer different variants and an average higher frequency compared to that of the rest of Italy. Consistently, four PVs explained about 60% of all carriers. The majority of the Bergamo PVs originated locally with only two PVs clearly imported. The Bergamo BRCA1/2 PV spectrum appears to be private. Hence, the Bergamo population would be ideal to study the disease risk associated with local PVs in breast cancer and other disease-causing genes. Finally, our data suggest that the Bergamo population is a genetic isolate and further analyses are warranted to prove this notion.
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Kadri MSN, Patel KM, Bhargava PA, Shah FD, Badgujar NV, Tarapara BV, Patel PS, Shaikh MI, Shah K, Patel A, Pandya S, Vora H, Joshi CG, Joshi MN. Mutational Landscape for Indian Hereditary Breast and Ovarian Cancer Cohort Suggests Need for Identifying Population Specific Genes and Biomarkers for Screening. Front Oncol 2021; 10:568786. [PMID: 33552952 PMCID: PMC7859489 DOI: 10.3389/fonc.2020.568786] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2020] [Accepted: 12/02/2020] [Indexed: 12/29/2022] Open
Abstract
BACKGROUND Breast and ovarian cancers are the most prevalent cancers and one of the leading causes of death in Indian women. The healthcare burden of breast and ovarian cancers and the rise in mortality rate are worrying and stress the need for early detection and treatment. METHODS We performed amplicon sequencing of 144 cases who had breast/ovarian cancer disease (total 137 cases are patients and seven are tested for BRCA1/2 carrier) Using our custom designed gene panel consisting of 14 genes, that are associated with high to moderate risk of breast and ovarian cancers. Variants were called using Torrent Variant Caller and were annotated using ThermoFisher's Ion Reporter software. Classification of variants and their clinical significance were identified by searching the variants against ClinVar database. RESULTS From a total of 144 cases, we were able to detect 42 pathogenic mutations in [40/144] cases. Majority of pathogenic mutations (30/41) were detected in BRCA1 gene, while (7/41) pathogenic mutations were detected in BRCA2 gene, whereas, (2/41) pathogenic mutations were detected in TP53 gene and BRIP1, PALB2, and ATM genes respectively. So, BRCA genes contributed 88.09% of pathogenic mutations, whereas non-BRCA genes contributed 11.91% of pathogenic mutations. We were also able to detect 25 VUS which were predicted to be damaging by in silico prediction tools. CONCLUSION Early detection of cancers in the Indian population can be done by genetic screening using customized multi-gene panels. Indications of our findings show that in the Indian population, apart from the common BRCA genes, there are other genes that are also responsible for the disease. High frequency mutations detected in the study and variants of uncertain significance predicted to be damaging by in silico pathogenicity prediction tools can be potential biomarkers of hereditary breast and ovarian cancer in Indian HBOC patients.
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Affiliation(s)
- Mohammed Shaad N. Kadri
- Gujarat Biotechnology Research Centre, Department of Science and Technology, Government of Gujarat, Gandhinagar, India
| | - Komal M. Patel
- Gujarat Biotechnology Research Centre, Department of Science and Technology, Government of Gujarat, Gandhinagar, India
| | - Poonam A. Bhargava
- Gujarat Biotechnology Research Centre, Department of Science and Technology, Government of Gujarat, Gandhinagar, India
| | - Franky D. Shah
- Gujarat Cancer Research Institute, Civil Hospital, Ahmedabad, India
| | | | | | | | - Mohammed Inayatullah Shaikh
- Gujarat Biotechnology Research Centre, Department of Science and Technology, Government of Gujarat, Gandhinagar, India
| | - Krati Shah
- Clinical Genetics, ONE-Centre for Rheumatology and Genetics, Vadodara, India
| | - Apurva Patel
- Gujarat Cancer Research Institute, Civil Hospital, Ahmedabad, India
| | - Shashank Pandya
- Gujarat Cancer Research Institute, Civil Hospital, Ahmedabad, India
| | - Hemangini Vora
- Gujarat Cancer Research Institute, Civil Hospital, Ahmedabad, India
| | - Chaitanya G. Joshi
- Gujarat Biotechnology Research Centre, Department of Science and Technology, Government of Gujarat, Gandhinagar, India
| | - Madhvi N. Joshi
- Gujarat Biotechnology Research Centre, Department of Science and Technology, Government of Gujarat, Gandhinagar, India
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Mighri N, Hamdi Y, Boujemaa M, Othman H, Ben Nasr S, El Benna H, Mejri N, Labidi S, Ayari J, Jaidene O, Bouaziz H, Ben Rekaya M, M'rad R, Haddaoui A, Rahal K, Boussen H, Boubaker S, Abdelhak S. Identification of Novel BRCA1 and RAD50 Mutations Associated With Breast Cancer Predisposition in Tunisian Patients. Front Genet 2020; 11:552971. [PMID: 33240314 PMCID: PMC7677579 DOI: 10.3389/fgene.2020.552971] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2020] [Accepted: 10/16/2020] [Indexed: 12/12/2022] Open
Abstract
Background Deleterious mutations on BRCA1/2 genes are known to confer high risk of developing breast and ovarian cancers. The identification of these mutations not only helped in selecting high risk individuals that need appropriate prevention approaches but also led to the development of the PARP-inhibitors targeted therapy. This study aims to assess the prevalence of the most frequent BRCA1 mutation in Tunisia, c.211dupA, and provide evidence of its common origin as well as its clinicopathological characteristics. We also aimed to identify additional actionable variants using classical and next generation sequencing technologies (NGS) which would allow to implement cost-effective genetic testing in limited resource countries. Patients and Methods Using sanger sequencing, 112 breast cancer families were screened for c.211dupA. A set of patients that do not carry this mutation were investigated using NGS. Haplotype analysis was performed to assess the founder effect and to estimate the age of this mutation. Correlations between genetic and clinical data were also performed. Results The c.211dupA mutation was identified in 8 carriers and a novel private BRCA1 mutation, c.2418dupA, was identified in one carrier. Both mutations are likely specific to North-Eastern Tunisia. Haplotype analysis supported the founder effect of c.211dupA and showed its recent origin. Phenotype-genotype correlation showed that both BRCA1 mutations seem to be associated with a severe phenotype. Whole Exome Sequencing (WES) analysis of a BRCA negative family revealed a Variant of Unknown Significance, c.3647C > G on RAD50. Molecular modeling showed that this variant could be classified as deleterious as it is responsible for destabilizing the RAD50 protein structure. Variant prioritization and pathway analysis of the WES data showed additional interesting candidate genes including MITF and ANKS6. Conclusion We recommend the prioritization of BRCA1-c.211dupA screening in high risk breast cancer families originating from the North-East of Tunisia. We also highlighted the importance of NGS in detecting novel mutations, such as RAD50-c.3647C > G. In addition, we strongly recommend using data from different ethnic groups to review the pathogenicity of this variant and reconsider its classification in ClinVar.
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Affiliation(s)
- Najah Mighri
- Laboratory of Biomedical Genomics and Oncogenetics, LR16IPT05, Institut Pasteur de Tunis, University of Tunis El Manar, Tunis, Tunisia
| | - Yosr Hamdi
- Laboratory of Biomedical Genomics and Oncogenetics, LR16IPT05, Institut Pasteur de Tunis, University of Tunis El Manar, Tunis, Tunisia
| | - Maroua Boujemaa
- Laboratory of Biomedical Genomics and Oncogenetics, LR16IPT05, Institut Pasteur de Tunis, University of Tunis El Manar, Tunis, Tunisia
| | - Houcemeddine Othman
- Sydney Brenner Institute for Molecular Bioscience, University of the Witwatersrand, Johannesburg, South Africa
| | - Sonia Ben Nasr
- Laboratory of Biomedical Genomics and Oncogenetics, LR16IPT05, Institut Pasteur de Tunis, University of Tunis El Manar, Tunis, Tunisia.,The Military Hospital of Tunis, Department of Medical Oncology, Tunis, Tunisia
| | - Houda El Benna
- Department of Medical Oncology, Abderrahmane Mami Hospital, Ariana, Tunisia
| | - Nesrine Mejri
- Laboratory of Biomedical Genomics and Oncogenetics, LR16IPT05, Institut Pasteur de Tunis, University of Tunis El Manar, Tunis, Tunisia.,Department of Medical Oncology, Abderrahmane Mami Hospital, Ariana, Tunisia
| | - Soumaya Labidi
- Laboratory of Biomedical Genomics and Oncogenetics, LR16IPT05, Institut Pasteur de Tunis, University of Tunis El Manar, Tunis, Tunisia.,Department of Medical Oncology, Abderrahmane Mami Hospital, Ariana, Tunisia
| | - Jihen Ayari
- Laboratory of Biomedical Genomics and Oncogenetics, LR16IPT05, Institut Pasteur de Tunis, University of Tunis El Manar, Tunis, Tunisia.,The Military Hospital of Tunis, Department of Medical Oncology, Tunis, Tunisia
| | - Olfa Jaidene
- Department of Carcinological Surgery, Salah Azaiez Institute, Tunis, Tunisia
| | - Hanen Bouaziz
- Department of Carcinological Surgery, Salah Azaiez Institute, Tunis, Tunisia
| | - Mariem Ben Rekaya
- Laboratory of Biomedical Genomics and Oncogenetics, LR16IPT05, Institut Pasteur de Tunis, University of Tunis El Manar, Tunis, Tunisia
| | - Ridha M'rad
- Service des Maladies Congénitales et Héréditaires, Hôpital Charles Nicolle, Tunis, Tunisia
| | - Abderrazek Haddaoui
- The Military Hospital of Tunis, Department of Medical Oncology, Tunis, Tunisia
| | - Khaled Rahal
- Department of Carcinological Surgery, Salah Azaiez Institute, Tunis, Tunisia
| | - Hamouda Boussen
- Laboratory of Biomedical Genomics and Oncogenetics, LR16IPT05, Institut Pasteur de Tunis, University of Tunis El Manar, Tunis, Tunisia.,Department of Medical Oncology, Abderrahmane Mami Hospital, Ariana, Tunisia
| | - Samir Boubaker
- Laboratory of Biomedical Genomics and Oncogenetics, LR16IPT05, Institut Pasteur de Tunis, University of Tunis El Manar, Tunis, Tunisia
| | - Sonia Abdelhak
- Laboratory of Biomedical Genomics and Oncogenetics, LR16IPT05, Institut Pasteur de Tunis, University of Tunis El Manar, Tunis, Tunisia
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Sadeghi F, Asgari M, Matloubi M, Ranjbar M, Karkhaneh Yousefi N, Azari T, Zaki-Dizaji M. Molecular contribution of BRCA1 and BRCA2 to genome instability in breast cancer patients: review of radiosensitivity assays. Biol Proced Online 2020; 22:23. [PMID: 33013205 PMCID: PMC7528506 DOI: 10.1186/s12575-020-00133-5] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2020] [Accepted: 08/04/2020] [Indexed: 12/24/2022] Open
Abstract
BACKGROUND DNA repair pathways, cell cycle arrest checkpoints, and cell death induction are present in cells to process DNA damage and prevent genomic instability caused by various extrinsic and intrinsic ionizing factors. Mutations in the genes involved in these pathways enhances the ionizing radiation sensitivity, reduces the individual's capacity to repair DNA damages, and subsequently increases susceptibility to tumorigenesis. BODY BRCA1 and BRCA2 are two highly penetrant genes involved in the inherited breast cancer and contribute to different DNA damage pathways and cell cycle and apoptosis cascades. Mutations in these genes have been associated with hypersensitivity and genetic instability as well as manifesting severe radiotherapy complications in breast cancer patients. The genomic instability and DNA repair capacity of breast cancer patients with BRCA1/2 mutations have been analyzed in different studies using a variety of assays, including micronucleus assay, comet assay, chromosomal assay, colony-forming assay, γ -H2AX and 53BP1 biomarkers, and fluorescence in situ hybridization. The majority of studies confirmed the enhanced spontaneous & radiation-induced radiosensitivity of breast cancer patients compared to healthy controls. Using G2 micronucleus assay and G2 chromosomal assay, most studies have reported the lymphocyte of healthy carriers with BRCA1 mutation are hypersensitive to invitro ionizing radiation compared to non-carriers without a history of breast cancer. However, it seems this approach is not likely to be useful to distinguish the BRCA carriers from non-carrier with familial history of breast cancer. CONCLUSION In overall, breast cancer patients are more radiosensitive compared to healthy control; however, inconsistent results exist about the ability of current radiosensitive techniques in screening BRCA1/2 carriers or those susceptible to radiotherapy complications. Therefore, developing further radiosensitivity assay is still warranted to evaluate the DNA repair capacity of individuals with BRCA1/2 mutations and serve as a predictive factor for increased risk of cancer mainly in the relatives of breast cancer patients. Moreover, it can provide more evidence about who is susceptible to manifest severe complication after radiotherapy.
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Affiliation(s)
- Fatemeh Sadeghi
- Department of Immunology, School of Medicine, Iran University of Medical Sciences, Tehran, Iran
- Digestive Diseases Research Institute, Digestive Oncology Research Center, Tehran University of Medical Sciences, Tehran, Iran
| | - Marzieh Asgari
- Rheumatology Research Center, Tehran University of Medical Sciences, Shariati Hospital, Kargar Ave, Tehran, Iran
| | - Mojdeh Matloubi
- Department of Immunology, School of Medicine, Iran University of Medical Sciences, Tehran, Iran
| | - Maral Ranjbar
- Department of Immunology, School of Medicine, Iran University of Medical Sciences, Tehran, Iran
| | - Nahid Karkhaneh Yousefi
- Cancer Research Center, Cancer Institute of Iran, Tehran University of Medical Sciences, Tehran, Iran
| | - Tahereh Azari
- Department of Immunology, School of Medicine, Iran University of Medical Sciences, Tehran, Iran
| | - Majid Zaki-Dizaji
- Legal Medicine Research Center, Legal Medicine Organization, Tehran, Iran
- Research Center for Immunodeficiencies, Children’s Medical Center, Tehran University of Medical Sciences, Tehran, Iran
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Prevalence of pancreaticobiliary cancers in Irish families with pathogenic BRCA1 and BRCA2 variants. Fam Cancer 2020; 20:97-101. [PMID: 32918181 DOI: 10.1007/s10689-020-00205-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2019] [Accepted: 08/27/2020] [Indexed: 12/27/2022]
Abstract
Pathogenic variants (PVs) in the BRCA1 and BRCA2 genes are associated with an increased lifetime risk of pancreatic ductal adenocarcinoma (PDAC), and more recently have been associated with increased risk of biliary tract cancers (BTC). This study assessed the prevalence, age and gender distribution of PDAC/BTC cases in families known to carry a BRCA1/2 PV compared to those of the Irish population. A review of all families referred to a national genetics clinic from 09/11/1997 to 01/06/2018 was performed. The BOADICEA algorithm was used to estimate the probability that an untested relative of a known BRCA1/2 PV carrier with PDAC was a carrier. We reviewed 3252 family pedigrees, 1193 contained a proband who underwent testing for BRCA1/2 based on Manchester score ≥ 15. Among 128 BRCA2 PV-positive families, 27 (21%) contained a 1st/2nd/3rd-degree relative with PDAC, while of 116 BRCA1 PV-positive families, 11 (9%) contained a 1st/2nd/3rd-degree relative with PDAC. Within these 38 families, 25 patients with PDAC had ≥ 50% likelihood of being a BRCA1/2 PV carrier. This cohort had a median age at diagnosis of 55 years (range 33-75), with a mean (55 years) lower than 8364 patients with PDAC identified through the National Cancer Registry of Ireland (71 years, p < 0.0001). Six BRCA2 positive (5%) and 2 BRCA1 positive pedigrees (2%) included an individual with BTC; median age at diagnosis was 65 years (range 33-99). PDAC and BTC are prevalent in Irish families harbouring a BRCA2 PV and are associated with early-onset malignancy. This supports current guidelines recommending universal germline testing for PDAC patients.
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