1
|
Makhetha M, Chabilal N, Aldous C. Recent trends in hereditary breast cancer incidence by race and age in KwaZulu-Natal, South Africa: An 11-year single-centre retrospective study (2011-2021). Int J Cancer 2024; 154:65-70. [PMID: 37578038 DOI: 10.1002/ijc.34687] [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: 03/01/2023] [Revised: 07/25/2023] [Accepted: 07/27/2023] [Indexed: 08/15/2023]
Abstract
Breast cancer incidence has increased globally in the last decade, especially in low- and middle-income countries. In Sub-Saharan Africa, breast cancer trends have been described only in a few populations owing to the scarcity of population-specific data. Using data collected between 2011 and 2021 at Inkosi Albert Luthuli Central Hospital, this retrospective study describes demographic and genetic trends for hereditary breast cancer patients in the KwaZulu-Natal province, South Africa. Six hundred and forty-five patients were included, of whom 44.3% were Black, 36.8% Indian, 15.6% White and 3.2% Coloured. The number of annual new cases increased from eight in 2011 to 145 in 2021, with a notable increase among Blacks. The mean onset age was 46 years, and Black patients were diagnosed ~10 years earlier than White and Indian patients. Triple-negative breast cancers accounted for 20.3% of hereditary cases, and 51.1% of them were Black. Bilateral and recurrent breast cancers constituted 7.4%, while pathogenic sequence variants in BRCA1/2 were reported in 10.4% of all patients, and the majority were Blacks and Indians. Overall, the KwaZulu-Natal province has seen an increase in hereditary breast cancer incidence in the past decade. Despite testing negative for pathogenic sequence variants, Black women frequently presented with breast cancers that are BRCA1-like, while Indians presented with extensive family history. This suggests that South African patients may require unique approaches to interventions, such as early detection and awareness programs among Blacks and increased genetic screening among Indians.
Collapse
Affiliation(s)
- Mpoi Makhetha
- Department of Clinical Medicine, Nelson R Mandela School of Medicine, College of Health Sciences, University of KwaZulu-Natal, Durban, South Africa
| | - Namitha Chabilal
- Department of Genetics, Inkosi Albert Luthuli Central Hospital, KwaZulu-Natal, South Africa
| | - Colleen Aldous
- Department of Clinical Medicine, Nelson R Mandela School of Medicine, College of Health Sciences, University of KwaZulu-Natal, Durban, South Africa
| |
Collapse
|
2
|
Ferreyra Y, Rosas G, Cock-Rada AM, Araujo J, Bravo L, Doimi F, Casas J, Clavo MDLÁ, Pinto JA, Belmar-López C. Landscape of germline BRCA1/BRCA2 variants in breast and ovarian cancer in Peru. Front Oncol 2023; 13:1227864. [PMID: 37664050 PMCID: PMC10470619 DOI: 10.3389/fonc.2023.1227864] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2023] [Accepted: 07/27/2023] [Indexed: 09/05/2023] Open
Abstract
Background There is an increasing amount of data from Latin America on the characterization of BRCA variants; however, there is limited information from Peru. We conducted a retrospective study to describe germline pathogenic/likely pathogenic(P/LP) variants and variants of uncertain/unknown significance (VUS) in the BRCA1 and BRCA2 genes in Peru, in patients with breast and ovarian cancer, candidates for treatment with poly (adenosine diphosphate-ribose) polymerase (PARP) inhibitors. Methods The patients were evaluated during the period 2019-2021. Genomic DNA was isolated from peripheral blood samples and targeted sequencing was performed using the Ampliseq BRCA panel. Genetic variant interpretation was carried out in accordance with the recommendations of the American College of Medical Genetics and ClinVar. During this period, 525 patients (143 with breast cancer and 382 with ovarian cancer) were studied. Results We found that 14.7% (21/143) of breast cancer patients and 20.7% (79/382) of ovarian cancer patients were carriers of P/LP variants in BRCA1/2. The most frequent pathogenic variants detected in BRCA1 were c.2105dupT (BIC: 2224insT, n=12, 18.75%), c.68_69delAG (BIC: 185delAG, n=6, 9.38%), c.140G>T and c.815_824dupAGCCATGTGG (n=5, 7.81%), while in BRCA2 were c.8023A>G (n=6, 16.67%), c.6024dupG (BIC: 6252insG, n=4, 11.11%), and c.9235delG (BIC: 9463delG, n=3, 8.33%). Regarding VUS, we found that 6.99% (10/143) of breast cancer patients and 7.33% (28/382) of ovarian cancer patients were carriers of a VUS in BRCA1/2. For BRCA1, the most frequent VUS was c.93C>G (n=2), and for BRCA2, c.5465A>T (n=4), c.3101T>C (n=3), c.205C>A and c.437T>C (n=2). Conclusion We found a frequency of 14.7% germline mutations in breast cancer patients and 20.7% in ovarian cancer patients. The most recurrent mutations were BRCA1 c.2105dupT and BRCA2 c.8023A>G. We found that BRCA2 c.8023A>G, c.6024dupG, and c.9235delG were not previously reported in Peruvian patients. BRCA1 c.2344dupA is a novel mutation that has not been previously reported in any database. The frequency of VUS in our cohort was 7.2%.
Collapse
Affiliation(s)
- Yomali Ferreyra
- Departamento de Bioingeniería, Universidad de Ingenieria y Tecnología, Lima, Peru
| | - Gina Rosas
- Departamento de Patología, Insituto Nacional de Enfermedades Neoplásicas, Lima, Peru
| | - Alicia M. Cock-Rada
- Departmento de Oncología Médica, Instituto de Cancerología Las Américas - Auna, Medellín, Colombia
| | - Jhajaira Araujo
- Centro de Investigación Básicas y traslacional, Auna Ideas, Lima, Peru
| | - Leny Bravo
- Escuela Profesional de Medicina Humana-Filial Ica, Universidad Privada San Juan Bautista, Ica, Peru
| | | | | | | | - Joseph A. Pinto
- Centro de Investigación Básicas y traslacional, Auna Ideas, Lima, Peru
| | - Carolina Belmar-López
- Escuela Profesional de Medicina Humana-Filial Ica, Universidad Privada San Juan Bautista, Ica, Peru
- Oncogenomics, Auna, Lima, Peru
| |
Collapse
|
3
|
Rweyemamu LP, Gültaşlar BK, Akan G, Dharsee N, Namkinga LA, Lyantagaye SL, Yazıcı H, Atalar F. Breast cancer in East Africa: Prevalence and spectrum of germline SNV/indel and CNVs in BRCA1 and BRCA2 genes among breast cancer patients in Tanzania. Cancer Med 2022; 12:3395-3409. [PMID: 35908255 PMCID: PMC9939169 DOI: 10.1002/cam4.5091] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2022] [Revised: 07/08/2022] [Accepted: 07/19/2022] [Indexed: 11/08/2022] Open
Abstract
BACKGROUND Growing prevalence and aggressiveness of breast cancer (BC) among East African women strongly indicate that the genetic risk factor implicated in the etiology of the disease may have a key role. Germline pathogenic variants in BRCA1 and BRCA2 (BRCA1/2) are known to increase the lifetime risk of BC. This study investigated the prevalence and spectrum of germline single nucleotide variant/insertion and deletion (SNV/indel), and copy number variations (CNVs) in BRCA1/2 among Tanzanian BC patients, and evaluated the associations of identified variants with patient's socio-demographic and histopathological characteristics. METHODS One hundred BC patients were examined for BRCA1/2 variants using next-generation sequencing (NGS). Sanger sequencing and multiplex ligation-dependent probe amplification (MLPA) assay were performed for the confirmation of SNV/indel and CNVs, respectively. RESULTS Six germline SNV/indel pathogenic variants were detected from six unrelated patients. Five of these variants were identified in BRCA1, and one in BRCA2. We also identified, in one patient, one variant of uncertain clinical significance (VUS). CNV was not detected in any of the BC patients. Furthermore, we found that in our cohort, BRCA1/2 variant carriers were triple-negative BC patients (p = 0.019). CONCLUSIONS Our study provides first insight into BC genetic landscape by the use of NGS in the under-represented East African Tanzanian populations. Our findings support the importance of genetic risk factors in BC etiology in Tanzania and showed a relatively high overall prevalence (6%) of germline BRCA1/2 pathogenic variants in BC patients. Therefore, our results indicate that BRCA1/2 pathogenic variants may well contribute to BC incidence in Tanzania. Thus, the identification of frequent variants in BRCA1/2 genes will enable implementation of rapid, inexpensive population-specific BRCA1/2 genetic testing, particularly for triple-negative BC patients known for their high prevalence in Tanzania. This will, in turn, greatly contributes to provide effective therapeutic strategies.
Collapse
Affiliation(s)
- Linus P. Rweyemamu
- Department of Molecular Biology and BiotechnologyUniversity of Dar es SalaamDar es SalaamTanzania,Mbeya College of Health and Allied SciencesUniversity of Dar es SalaamMbeyaTanzania
| | - Büşra K. Gültaşlar
- Division of Cancer Genetics, Department of Basic Oncology, Institute of OncologyIstanbul UniversityIstanbulTurkiye
| | - Gokce Akan
- DESAM Research InstituteNear East UniversityNicosiaCyprus,MUHAS Genetic Laboratory, Department of BiochemistryMuhimbili University of Health and Allied SciencesDar es SalaamTanzania
| | - Nazima Dharsee
- Academic, Research and Consultancy UnitOcean Road Cancer InstituteDar es SalaamTanzania
| | - Lucy A. Namkinga
- Department of Molecular Biology and BiotechnologyUniversity of Dar es SalaamDar es SalaamTanzania
| | - Sylvester L. Lyantagaye
- Department of Molecular Biology and BiotechnologyUniversity of Dar es SalaamDar es SalaamTanzania,Mbeya College of Health and Allied SciencesUniversity of Dar es SalaamMbeyaTanzania
| | - Hülya Yazıcı
- Division of Cancer Genetics, Department of Basic Oncology, Institute of OncologyIstanbul UniversityIstanbulTurkiye,Department of Medical Biology and Genetics, Faculty of MedicineIstanbul Arel UniversityIstanbulTurkiye
| | - Fatmahan Atalar
- MUHAS Genetic Laboratory, Department of BiochemistryMuhimbili University of Health and Allied SciencesDar es SalaamTanzania,Department of Rare Diseases, Child Health InstituteIstanbul UniversityIstanbulTurkiye
| |
Collapse
|
4
|
Terashima T, Morizane C, Ushiama M, Shiba S, Takahashi H, Ikeda M, Mizuno N, Tsuji K, Yasui K, Azemoto N, Satake H, Nomura S, Yachida S, Sugano K, Furuse J. Germline variants in cancer-predisposing genes in pancreatic cancer patients with a family history of cancer. Jpn J Clin Oncol 2022; 52:1105-1114. [PMID: 36135357 DOI: 10.1093/jjco/hyac110] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2022] [Accepted: 06/24/2022] [Indexed: 11/14/2022] Open
Abstract
BACKGROUND Our phase II trial (FABRIC study) failed to verify the efficacy of gemcitabine plus oxaliplatin (GEMOX) in patients with pancreatic ductal adenocarcinoma (PDAC) with a familial or personal history of pancreatic, breast, ovarian or prostate cancer, which suggested that a family and personal history may be insufficient to determine response to platinum-based chemotherapy. METHODS This ancillary analysis aimed to investigate the prevalence of germline variants of homologous recombination repair (HRR)-related genes and clarify the association of germline variants with the efficacy of GEMOX and patient outcome in PDAC patients. Of 45 patients enrolled in FABRIC study, 27 patients were registered in this ancillary analysis. RESULTS Of the identified variants in HRR-related genes, one variant was considered pathogenic and eight variants in six patients (22%) were variants of unknown significance (VUS). Objective response to GEMOX was achieved by 43% of the seven patients and tended to be higher than that of patients without such variants (25%). Pathogenic/VUS variant in HRR-related genes was an independent favorable factor for progression-free survival (hazard ratio, 0.322; P = 0.047) and overall survival (hazard ratio, 0.195; P = 0.023) in multivariable analysis. CONCLUSIONS The prevalence of germline variants in PDAC patients was very low even among patients with a familial/personal history of pancreatic, breast, ovarian or prostate cancer. Patients with one or more germline variants in HRR-related genes classified as pathogenic or VUS may have the potential to obtain better response to GEMOX and have better outcomes.
Collapse
Affiliation(s)
- Takeshi Terashima
- Department of Gastroenterology, Kanazawa University Hospital, Kanazawa, Japan.,Department of Hepatobiliary and Pancreatic Oncology, National Cancer Center Hospital, Tokyo, Japan
| | - Chigusa Morizane
- Department of Hepatobiliary and Pancreatic Oncology, National Cancer Center Hospital, Tokyo, Japan
| | - Mineko Ushiama
- Department of Genetic Medicine and Services, National Cancer Center Hospital, Tokyo, Japan
| | - Satoshi Shiba
- Division of Cancer Genomics, National Cancer Center Research Institute, Tokyo, Japan
| | - Hideaki Takahashi
- Department of Hepatobiliary and Pancreatic Oncology, National Cancer Center Hospital East, Kashiwa, Japan
| | - Masafumi Ikeda
- Department of Hepatobiliary and Pancreatic Oncology, National Cancer Center Hospital East, Kashiwa, Japan
| | - Nobumasa Mizuno
- Department of Gastroenterology, Aichi Cancer Center Hospital, Nagoya, Japan
| | - Kunihiro Tsuji
- Department of Gastroenterology, Ishikawa Prefectural Central Hospital, Kanazawa, Japan
| | - Kohichiroh Yasui
- Department of Gastroenterology and Hepatology, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - Nobuaki Azemoto
- Department of Gastroenterology, Shikoku Cancer Center, Matsuyama, Japan
| | - Hironaga Satake
- Department of Medical Oncology, Kobe City Medical Center General Hospital, Kobe, Japan.,Department of Medical Oncology, Kochi Medical School, Kochi, Japan
| | - Shogo Nomura
- Biostatistics Division, Center for Research Administration and Support, National Cancer Center, Tokyo, Japan
| | - Shinichi Yachida
- Department of Cancer Genome Informatics, Graduate School of Medicine, Osaka University, Osaka, Japan.,Division of Genomic Medicine, National Cancer Center Research Institute, Tokyo, Japan
| | - Kokichi Sugano
- Department of Genetic Medicine and Services, National Cancer Center Hospital, Tokyo, Japan.,Department of Genetic Medicine, Kyoundo Hospital, Sasaki Foundation, Tokyo, Japan
| | - Junji Furuse
- Department of Medical Oncology, Kyorin University Faculty of Medicine, Tokyo, Japan
| |
Collapse
|
5
|
Molina-Zayas M, Garrido-Navas C, García-Puche JL, Barwell J, Pedrinaci S, Atienza MM, García-Linares S, de Haro-Muñoz T, Lorente JA, Serrano MJ, Poyatos-Andújar A. Identification of hereditary breast and ovarian cancer germline variants in Granada (Spain): NGS perspective. Mol Genet Genomics 2022; 297:859-871. [PMID: 35451682 PMCID: PMC9130174 DOI: 10.1007/s00438-022-01891-5] [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: 08/06/2021] [Accepted: 03/23/2022] [Indexed: 12/09/2022]
Abstract
The aim of this study was to assess the prevalence of germline variants in cancer-predisposing genes by either targeted (BRCA1/2) or multigene NGS panel in a high-risk Hereditary Breast and Ovarian Cancer (HBOC) cohort. Samples from 824 Caucasian probands were retrospectively collected and the impact of genetic diagnosis and genetic variants epidemiology in this cohort was evaluated. Performance of risk-reducing prophylactic measures, such as prophylactic mastectomy and/or prophylactic oophorectomy, was assessed through clinical follow-up of patients with a positive genetic result. Pathogenic variants predisposing to HBOC were identified in 11.9% (98/824) individuals at BRCA2 (47/98), BRCA1 (24/98), PALB2 (8/51), ATM (7/51), CHEK2 (6/51) MSH6, (2/51), RAD51C (2/51) and TP53 (2/386). Of them, 11 novel pathogenic variants and 12 VUS were identified, characterized, and submitted to ClinVar. Regarding clinical impact, the risk of developing basal or Her2 breast cancer was increased 15.7 times or 37.5 times for BRCA1 and MSH6 pathogenic variants respectively. On the contrary, the risk of developing basal or luminal A breast cancer was reduced to 81% or 77% for BRCA2 and BRCA1 pathogenic variants, respectively. Finally, 53.2% of individuals testing positive for class IV/V variants underwent prophylactic surgery (mastectomy, oophorectomy or both) being significantly younger at the cancer diagnosis than those undertaking prophylactic measures (p = 0.008). Of them, 8 carried a pathogenic/likely pathogenic variant in other genes different from BRCA1 and BRCA2, and the remaining (46.7%) decided to continue with clinical follow-up. No differences in pathogenicity or risk of developing cancer were found for BRCA1/2 between targeted and multigene sequencing strategies; however, NGS was able to resolve a greater proportion of high-risk patients.
Collapse
Affiliation(s)
- María Molina-Zayas
- UGC de Laboratorios, Hospital Universitario Clínico San Cecilio, Avda de la Investigación s/n, 18016, Granada, Spain
| | - Carmen Garrido-Navas
- Genetics Department, Faculty of Sciences, Universidad de Granada, 18071, Granada, Spain. .,CONGEN, Genetic Counselling Services, C/Albahaca 4, 18006, Granada, Spain.
| | - Jose Luis García-Puche
- Oncology Department, Vithas Granada Hospital, Avda de Santa María de La Alhambra, Granada, Spain
| | - Julian Barwell
- Leicestershire Clinical Genetics Service, University Hospitals of Leicester NHS Trust, Leicester, UK
| | - Susana Pedrinaci
- UGC de Laboratorios, Hospital Universitario Virgen de Las Nieves, Avda de Las Fuerzas Armadas, 2, 18014, Granada, Spain
| | - Margarita Martínez Atienza
- UGC de Laboratorios, Hospital Universitario Virgen de Las Nieves, Avda de Las Fuerzas Armadas, 2, 18014, Granada, Spain
| | - Susana García-Linares
- UGC de Laboratorios, Hospital Universitario Clínico San Cecilio, Avda de la Investigación s/n, 18016, Granada, Spain
| | - Tomás de Haro-Muñoz
- UGC de Laboratorios, Hospital Universitario Clínico San Cecilio, Avda de la Investigación s/n, 18016, Granada, Spain
| | - Jose Antonio Lorente
- Legal Medicine Department, Medicine School, Universidad de Granada, 18016, Granada, Spain
| | - M Jose Serrano
- Department of Medical Oncology, Bio-Health Research Institute (Instituto de Investigación Biosanitaria Ibs GRANADA), Hospital Universitario Virgen de Las Nieves Granada, University of Granada, Granada, Spain.,Department of Pathological Anatomy, Faculty of Medicine, Campus de Ciencias de la Salud, University of Granada, Granada, Spain
| | - Antonio Poyatos-Andújar
- UGC de Laboratorios, Hospital Universitario Clínico San Cecilio, Avda de la Investigación s/n, 18016, Granada, Spain.
| |
Collapse
|
6
|
Next step in molecular genetics of hereditary breast/ovarian cancer: Multigene panel testing in clinical actionably genes and prioritization algorithms in the study of variants of uncertain significance. Eur J Med Genet 2022; 65:104468. [PMID: 35245693 DOI: 10.1016/j.ejmg.2022.104468] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2021] [Revised: 01/15/2022] [Accepted: 02/25/2022] [Indexed: 02/06/2023]
Abstract
INTRODUCTION BRCA1 and BRCA2 are the two main genes causing hereditary breast and ovarian cancer (HBOC). However, thanks to the development of Next Generation Sequencing (NGS), other genes linked to this syndrome (CHEK2, BRIP1, ATM and PALB2 among others) can be analysed. MATERIAL AND METHODS an analysis by multigene panel testing was performed in 138 index cases (ICs) from HBOC Spanish families with a previous non-informative result for BRCA1/2. The BRCA Hereditary Cancer Master™ Plus kit, including 26 actionable and candidate genes related to HBOC was employed. Once classified, an algorithm was employed to prioritized those variants of unknown significance with a higher risk of having a deleterious effect. Moreover, a mRNA splicing assay was performed for the prioritized VUS c.3402+3A > C in ATM, located at intron 23. RESULTS A total of 82 variants were found: 70 VUS and 12 pathogenic or probably pathogenic variants. The diagnostic yield in actionable genes non-BRCA was 7.97% of the total tested ICs. Overall, 19 VUS were prioritized, which meant 27% of the 70 total VUS. RNA analysis of the variant 3402+3A > C confirmed a deleterious impact on splicing. DISCUSSION The implementation of a multigene panel in HBOC studied families improved the diagnostic yield, concordant with results obtained in previous publications. Due to the important number of VUS obtained in NGS, the application of a prioritization algorithm is needed in order to select those variants in which it is necessary to conduct further studies.
Collapse
|
7
|
Govoni VM, Da Silva TC, Guerra JM, Pereira IVA, Queiroga FL, Cogliati B. Genetic variants of BRCA1 and BRCA2 genes in cats with mammary gland carcinoma. Vet Comp Oncol 2021; 19:404-408. [PMID: 33576549 DOI: 10.1111/vco.12685] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2020] [Revised: 11/17/2020] [Accepted: 02/08/2021] [Indexed: 12/24/2022]
Abstract
Mammary tumours are the first and third most incident neoplasm in women and cats, respectively. Approximately 85% of feline mammary gland tumours are malignant and aggressive, especially the triple-negative and HER-2+ molecular subtypes. Triple-negative basal-like feline mammary carcinomas (FMCs) are considered suitable models due to the clinical and morphological similarities with human basal-like triple-negative breast cancer (TNBC). In women, TNBC has a poor prognosis and is often associated with mutations in the tumour suppressor genes BRCA1 and BRCA2. In light of this, the aim of the present investigation was to screen somatic and germline variants of BRCA1 and BRCA2 in nine female cats bearing FMCs. Matched whole blood and FMC samples were obtained for genetic analysis. Additional tumour samples were obtained for histopathological and immunohistochemical evaluation. Genomic DNA was isolated and 27 exonic regions of BRCA1 and BRCA2 genes were amplified and screened by next-generation sequencing. A somatic variant with high functional impact was found in exon 11 of BRCA2 at a frequency of 4.34% in one FMC-bearing cat. Four germline variants with moderate impact were detected in three of the nine FMC-bearing cats and were restricted to exon 9 of BRCA1. It is concluded that the germline genetic variants found in one-third of FMC-bearing animals might be associated with a higher risk of hereditary mammary carcinogenesis.
Collapse
Affiliation(s)
- Verônica Mollica Govoni
- Department of Pathology, School of Veterinary Medicine and Animal Science, University of São Paulo, São Paulo, SP, Brazil
| | - Tereza Cristina Da Silva
- Department of Pathology, School of Veterinary Medicine and Animal Science, University of São Paulo, São Paulo, SP, Brazil
| | - Juliana Mariotti Guerra
- Department of Pathology, School of Veterinary Medicine and Animal Science, University of São Paulo, São Paulo, SP, Brazil
| | - Isabel Veloso Alves Pereira
- Department of Pathology, School of Veterinary Medicine and Animal Science, University of São Paulo, São Paulo, SP, Brazil
| | - Felisbina Luisa Queiroga
- Center for the Study of Animal Sciences, CECA-ICETA, University of Porto, Porto, Portugal.,Center for Research and Technology of Agro-Environment and Biological Sciences (CITAB), University of Trás-os-Montes e Alto Douro, Vila Real, Portugal
| | - Bruno Cogliati
- Department of Pathology, School of Veterinary Medicine and Animal Science, University of São Paulo, São Paulo, SP, Brazil
| |
Collapse
|
8
|
El Ansari FZ, Jouali F, Marchoudi N, Bennani MM, Ghailani NN, Barakat A, Fekkak J. Screening of BRCA1/2 genes mutations and copy number variations in patients with high risk for hereditary breast and ovarian cancer syndrome (HBOC). BMC Cancer 2020; 20:747. [PMID: 32778078 PMCID: PMC7418307 DOI: 10.1186/s12885-020-07250-0] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2020] [Accepted: 08/03/2020] [Indexed: 12/12/2022] Open
Abstract
Background Hereditary breast and ovarian cancer (HBOC) is an autosomal dominant inherited cancer susceptibility disorder. Both BRCA1 and BRCA2 genes are considered as high penetrance genes of this syndrome. The identification of BRCA1/2 genetic alterations before cancer development, grant patients the chance to benefit from various medical cancer prevention approaches. Therefore, the appearance of recent advanced technologies in molecular analysis such as next generation sequencing has simplified full BRCA1/2 analysis. Many attempts took place in hope of understanding the molecular germline spectrum of these two genes in Moroccan HBOC patients. However, most of the past projects focused only on young breast cancer cases, lacked ovarian cancer cases in their cohort and only a limited number of these studies were able to analyze the entire exons or copy number variations for both genes. In attempt of gaining more information regarding the molecular profile of BRCA1/2 in HBOC, we conducted a study in which we analyze their molecular profile on selected Moroccan patients suspected of having HBOC syndrome. Methods In this study we obtained blood samples from 64 selected Moroccan patients, who suffered from Breast and/or ovarian cancer and had a strong family history for cancer. To analyze BRCA1/2 punctual variants and copy number variations, we used the Ion Personal Genome Machine (PGM) and Oncomine BRCA1/2 research assay panel. Afterward, we correlated the molecular results with the clinic-pathologic data using IBM SPSS Statistics ver 2. Results From the 64 selected cases, Forty-six had breast cancer, fifteen had ovarian cancer and three had both breast and ovarian cancer. The molecular analysis revealed that 18 patients from the 64 harbored a pathogenic variant (28%). Twelve had six different BRCA1 pathogenic variants and six had six different BRCA2 pathogenic variants. In this study, we report four pathogenic variants that to the best of our knowledge has never been reported in the Moroccan population before. Regarding copy number variation analysis, No CNV was detected in both genes for all the 64 successfully sequenced and analyzed patients in our cohort. Conclusion Work like the present has an important implication on public health and science. It is critical that molecular profiling studies are performed on underserved and understudied population like Morocco.
Collapse
Affiliation(s)
- Fatima Zahra El Ansari
- Biomedical Genomics and Oncogenetics Research Laboratory, Faculty of Sciences and Techniques of Tangier, University Abdelmalek Essaâdi, 90000, Tangier, Morocco. .,Molecular Biology Department, ANOUAL Laboratory, Casablanca, Morocco.
| | - Farah Jouali
- Molecular Biology Department, ANOUAL Laboratory, Casablanca, Morocco
| | - Nabila Marchoudi
- Molecular Biology Department, ANOUAL Laboratory, Casablanca, Morocco
| | - Mohcine Mechita Bennani
- Biomedical Genomics and Oncogenetics Research Laboratory, Faculty of Sciences and Techniques of Tangier, University Abdelmalek Essaâdi, 90000, Tangier, Morocco
| | - Naima Nourouti Ghailani
- Biomedical Genomics and Oncogenetics Research Laboratory, Faculty of Sciences and Techniques of Tangier, University Abdelmalek Essaâdi, 90000, Tangier, Morocco
| | - Amina Barakat
- Biomedical Genomics and Oncogenetics Research Laboratory, Faculty of Sciences and Techniques of Tangier, University Abdelmalek Essaâdi, 90000, Tangier, Morocco
| | - Jamal Fekkak
- Molecular Biology Department, ANOUAL Laboratory, Casablanca, Morocco
| |
Collapse
|
9
|
Ruiz de Sabando A, Urrutia Lafuente E, García-Amigot F, Alonso Sánchez A, Morales Garofalo L, Moreno S, Ardanaz E, Ramos-Arroyo MA. Genetic and clinical characterization of BRCA-associated hereditary breast and ovarian cancer in Navarra (Spain). BMC Cancer 2019; 19:1145. [PMID: 31771539 PMCID: PMC6880350 DOI: 10.1186/s12885-019-6277-x] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2019] [Accepted: 10/20/2019] [Indexed: 12/11/2022] Open
Abstract
BACKGROUND Genetic testing for BRCA1/2 genes is widely used as a strategy to reduce incidence and morbidity of hereditary breast and ovarian cancer (HBOC). The purpose of this study is to analyse the demographic and molecular characteristics of BRCA germline mutations in Navarra, Spain, and to investigate the clinical profile of hereditary and sporadic breast cancer (BC) and ovarian cancer (OC) in the Community. METHODS The study includes 1246 individuals assessed for BRCA1/2 genetic testing in Navarra, during 2000-2016, and a cohort of BC (n = 4384) and OC (n = 561) from the population-based Navarra Cancer Registry. Distribution and molecular characteristics of BRCA1/2 mutations, as well as, comparative analysis of the clinical course, pathologic features and overall survival (OS) of patients in different risk groups were investigated. RESULTS BRCA mutation detection rate was 16%, with higher proportion (63%) of BRCA2 families. Nineteen per cent of mutations were recurrent, one of which, BRCA2 c.6024dupG, showed high association to OC. BRCA carriers had double risk (95% CI = 1.04-4.33) of developing multiple malignancies than low risk families and were diagnosed at a much earlier age (16.6 and 11.7 years difference for BC and OC, respectively) when compared to the general population. For BC, BRCA carriers showed a more advanced histological stage, higher risk of bilateral neoplasms (OR = 4.3; 95% CI = 1.3-11.4, for BRCA2 carriers) and worse OS rate at 5-, 10- and 15- years, than women with sporadic tumors. For OC, over 70% of patients of all risk groups showed advanced stages at diagnosis, with the highest among BRCA1 carriers (91%). Furthermore, they also had higher probability of developing ovarian bilateral tumors (OR = 7.8, 95% CI = 1.7-55.7, for BRCA1 carriers) than the general population. Five-year OS rate was worse among women with sporadic OC than BRCA carriers, but it levelled out over the 15-year period. CONCLUSIONS In addition to national similarities in the HBOC-BRCA1/2 associated mutational spectrum, we identified a recurrent BRCA2 pathogenic variant (c.6024dupG), highly associated to OC in Navarra. Carriers of BRCA1/2 mutations showed a more severe BC and OC phenotype and had a worse overall prognosis when compared to a large cohort of women with sporadic counterpart tumors.
Collapse
Affiliation(s)
- Ainara Ruiz de Sabando
- Department of Medical Genetics, Complejo Hospitalario de Navarra (CHN), Pamplona, Spain.,Navarrabiomed, Pamplona, Spain.,IdiSNA, Navarra Institute for Health Research, Pamplona, Spain
| | - Edurne Urrutia Lafuente
- Department of Medical Genetics, Complejo Hospitalario de Navarra (CHN), Pamplona, Spain.,Navarrabiomed, Pamplona, Spain
| | - Fermín García-Amigot
- Department of Medical Genetics, Complejo Hospitalario de Navarra (CHN), Pamplona, Spain.,IdiSNA, Navarra Institute for Health Research, Pamplona, Spain
| | - Angel Alonso Sánchez
- Department of Medical Genetics, Complejo Hospitalario de Navarra (CHN), Pamplona, Spain.,Navarrabiomed, Pamplona, Spain.,IdiSNA, Navarra Institute for Health Research, Pamplona, Spain
| | | | - Sira Moreno
- Department of Medical Genetics, Complejo Hospitalario de Navarra (CHN), Pamplona, Spain
| | - Eva Ardanaz
- IdiSNA, Navarra Institute for Health Research, Pamplona, Spain.,Navarra Public Health Institute, Pamplona, Spain.,CIBER Epidemiology and Public Health CIBERESP, Madrid, Spain
| | - Maria A Ramos-Arroyo
- Department of Medical Genetics, Complejo Hospitalario de Navarra (CHN), Pamplona, Spain. .,IdiSNA, Navarra Institute for Health Research, Pamplona, Spain.
| |
Collapse
|
10
|
Samtani R, Saksena D. BRCA gene mutations: A population based review. GENE REPORTS 2019. [DOI: 10.1016/j.genrep.2019.100380] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
|
11
|
Cost–utility analysis of germline BRCA1/2 testing in women with high-grade epithelial ovarian cancer in Spain. Clin Transl Oncol 2019; 21:1076-1084. [DOI: 10.1007/s12094-018-02026-2] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2018] [Accepted: 12/21/2018] [Indexed: 02/06/2023]
|
12
|
Chen H, Wu J, Zhang Z, Tang Y, Li X, Liu S, Cao S, Li X. Association Between BRCA Status and Triple-Negative Breast Cancer: A Meta-Analysis. Front Pharmacol 2018; 9:909. [PMID: 30186165 PMCID: PMC6111442 DOI: 10.3389/fphar.2018.00909] [Citation(s) in RCA: 102] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2018] [Accepted: 07/24/2018] [Indexed: 01/07/2023] Open
Abstract
Triple-negative breast cancer (TNBC) is a subtype of aggressive breast cancer and characterized by a lack of the expression of estrogen receptor, progesterone receptor and human epidermal growth factor receptor 2. BRCA genes are tumor-suppressor genes that are involved in DNA damage repair and mutations of BRCA genes may increase the risk of developing breast cancer and/or ovarian cancer due to defective DNA repair mechanisms. However, the relationship between BRCA status and TNBC needs to be further investigated and validated. The aim of this meta-analysis was to evaluate the association between BRCA status and TNBC. We systematically searched the electronic databases of MEDLINE (PubMed), Embase, and Cochrane Library to identify relevant publications from April, 1959 to November, 2017. The data from the studies were examined by a meta-analysis using STATA software to calculate the odds ratio (OR) with 95% confidence interval (CI) by fixed-effect and random-effect models. We identified 16 qualified studies from 527 publications with 46,870 breast cancer patients including 868 BRCA1 mutations (BRCA1Mut) carriers, 739 BRCA2 mutations (BRCA2Mut) carriers, and 45,263 non-carriers. The results showed that breast cancer patients with BRCA1Mut carriers were more likely to have TNBC than those of BRCA2Mut carriers (OR: 3.292; 95% CI: 2.773–3.909) or non-carriers (OR: 8.889; 95% CI: 6.925–11.410). Furthermore, high expression of nuclear grade and large tumor burden (>2 cm) were significantly more common in breast cancer patients with BRCA1Mut carriers than those of BRCA2Mut carriers (OR: 2.663; 95% CI: 1.731–4.097; P = 0.211) or non-carriers (OR: 1.577; 95% CI: 1.067–2.331; P = 0.157). The data suggest that breast cancer patients with BRCA1Mut are more likely to have TNBC, high nuclear grade, and larger tumor burden.
Collapse
Affiliation(s)
- Haixia Chen
- Department of Pharmacology, School of Pharmacy, Southwest Medical University, Luzhou, China
| | - Jianming Wu
- Department of Pharmacology, School of Pharmacy, Southwest Medical University, Luzhou, China
| | - Zhihong Zhang
- Department of General Medicine, The Affiliated Hospital of Southwest Medical University, Luzhou, China
| | - Yong Tang
- Department of Pharmacology, School of Pharmacy, Southwest Medical University, Luzhou, China
| | - Xiaoxuan Li
- Department of Pharmacology, School of Pharmacy, Southwest Medical University, Luzhou, China
| | - Shuangqing Liu
- Department of General Medicine, The Affiliated Hospital of Southwest Medical University, Luzhou, China
| | - Shousong Cao
- Department of Pharmacology, School of Pharmacy, Southwest Medical University, Luzhou, China
| | - Xianzhu Li
- Department of General Medicine, The Affiliated Hospital of Southwest Medical University, Luzhou, China
| |
Collapse
|