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de Oliveira Ferreira C, Carneiro VCG, Araujo Mariz C. Germline mutations in BRCA1 and BRCA2 among Brazilian women with ovarian cancer treated in the Public Health System. BMC Cancer 2024; 24:499. [PMID: 38641594 PMCID: PMC11027424 DOI: 10.1186/s12885-024-12246-1] [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: 02/08/2024] [Accepted: 04/10/2024] [Indexed: 04/21/2024] Open
Abstract
BACKGROUND Germline mutations in BRCA1 and BRCA2 genes are among the main causes of hereditary ovarian cancer. Identifying these mutations may reduce cancer risk, facilitate early detection, and enable personalized treatment. However, genetic testing is limited in the Brazilian Public Health System, and data regarding germline mutations in many regions are scarce. Therefore, the study aimed to investigate the prevalence of germline mutations in BRCA1 and BRCA2 in women with ovarian cancer treated in the Public Health System in Pernambuco, Brazil. METHODS A cross-sectional study was conducted in the Hereditary Cancer Program from two reference oncological centers in Pernambuco. Women (n = 45) with high-grade serous ovarian cancer underwent genetic counseling and DNA sequencing for BRCA1 and BRCA2 genes. RESULTS The prevalence of deleterious mutations in the BRCA1 and BRCA2 genes was 33%. Of the 15 germline mutations found, 13 were in BRCA1 and 2 in BRCA2; two mutations of unknown clinical significance were also found in BRCA2. Mutations c.5266dupC and c.2215 A > T were the most frequent; each was mutation observed in three patients. Additionally, the mutations c.7645dupT and c.921dupT were reported for the first time. CONCLUSION One in three women showed a pathogenic mutation, demonstrating a significant prevalence of germline mutations in this sample. Additionally, the small sample revealed an interesting number of mutations, indicating the need to explore more regions of the country.
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Affiliation(s)
| | - Vandré Cabral Gomes Carneiro
- Hospital de Câncer de Pernambuco, Recife, Pernambuco, Brazil
- Instituto de Medicina Integral Professor Fernando Figueira, Recife, Pernambuco, Brazil
| | - Carolline Araujo Mariz
- Instituto Aggeu Magalhães, FIOCRUZ, Recife, Pernambuco, Brazil.
- Faculdade de Medicina de Olinda, Olinda, Pernambuco, Brazil.
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Ossa Gomez CA, Achatz MI, Hurtado M, Sanabria-Salas MC, Sullcahuaman Y, Chávarri-Guerra Y, Dutil J, Nielsen SM, Esplin ED, Michalski ST, Bristow SL, Hatchell KE, Nussbaum RL, Pineda-Alvarez DE, Ashton-Prolla P. Germline Pathogenic Variant Prevalence Among Latin American and US Hispanic Individuals Undergoing Testing for Hereditary Breast and Ovarian Cancer: A Cross-Sectional Study. JCO Glob Oncol 2022; 8:e2200104. [PMID: 35867948 PMCID: PMC9812461 DOI: 10.1200/go.22.00104] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023] Open
Abstract
PURPOSE To report on pathogenic germline variants detected among individuals undergoing genetic testing for hereditary breast and/or ovarian cancer (HBOC) from Latin America and compare them with self-reported Hispanic individuals from the United States. METHODS In this cross-sectional study, unrelated individuals with a personal/family history suggestive of HBOC who received clinician-ordered germline multigene sequencing were grouped according to the location of the ordering physician: group A, Mexico, Central America, and the Caribbean; group B, South America; and group C, United States with individuals who self-reported Hispanic ethnicity. Relatives who underwent cascade testing were analyzed separately. RESULTS Among 24,075 unrelated probands across all regions, most were female (94.9%) and reported a personal history suggestive of HBOC (range, 65.0%-80.6%); the mean age at testing was 49.1 ± 13.1 years. The average number of genes analyzed per patient was highest in group A (A 63 ± 28, B 56 ± 29, and C 40 ± 28). Between 9.1% and 18.7% of patients had pathogenic germline variants in HBOC genes (highest yield in group A), with the majority associated with high HBOC risk. Compared with US Hispanics individuals the overall yield was significantly higher in both Latin American regions (A v C P = 1.64×10-9, B v C P < 2.2×10-16). Rates of variants of uncertain significance were similar across all three regions (33.7%-42.6%). Cascade testing uptake was low in all regions (A 6.6%, B 4.5%, and C 1.9%). CONCLUSION This study highlights the importance of multigene panel testing in Latin American individuals with newly diagnosed or history of HBOC, who can benefit from medical management changes including targeted therapies, eligibility to clinical trials, risk-reducing surgeries, surveillance and prevention of secondary malignancy, and genetic counseling and subsequent cascade testing of at-risk relatives.
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Affiliation(s)
| | - Maria Isabel Achatz
- Department of Oncology, Hospital Sírio-Libanês, Brasília, Distrito Federal, Brazil
| | - Mabel Hurtado
- Instituto Oncológico, Fundación Arturo López Pérez, Santiago, Chile
| | | | - Yasser Sullcahuaman
- Universidad Peruana de Ciencias Aplicadas, Lima, Peru,Instituto de Investigación Genomica, Lima, Peru
| | - Yanin Chávarri-Guerra
- Department of Hemato-Oncology, Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán, Mexico City, Mexico
| | - Julie Dutil
- Cancer Biology Division, Ponce Research Institute, Ponce Health Sciences University, Pone, Puerto Rico
| | | | | | | | | | | | | | - Daniel E. Pineda-Alvarez
- Invitae, San Francisco, CA,Daniel E. Pineda-Alvarez, MD, Medical Affairs, Invitae Corporation, 1400 16th Street, San Francisco, CA, 94103; e-mail:
| | - Patricia Ashton-Prolla
- Departamento de Genética, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil,Serviço de Genética Médica e Laboratório de Medicina Genômica, Centro de Pesquisa Experimental, Hospital de Clínicas de Porto Alegre, Porto Alegre, Brazil
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BRCA1 and BRCA2 screening of nine Chilean founder mutations through allelic-discrimination and real-time PCR in breast/ovarian cancer patients. Mol Biol Rep 2022; 49:7531-7539. [PMID: 35596815 PMCID: PMC9123627 DOI: 10.1007/s11033-022-07561-4] [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: 01/05/2022] [Accepted: 05/04/2022] [Indexed: 11/02/2022]
Abstract
BACKGROUND In a previous work, we identified nine founder mutations present in close to 80% of BRCA1 and BRCA2 mutation carriers, and distributed across the country. The presence of founder mutations constitutes a valuable opportunity to develop new strategies for genetic screening. Genetic tests are primarily performed by NGS sequencing, which requires sophisticated and expensive equipment, and it takes 2-3 weeks for the results to be informed to the patient. In addition, genetic tests are not covered by insurance companies in Latin American countries. In this work, we present the standardization and technical validation of a real-time PCR based methodology for allelic discrimination in order to identify the nine Chilean founder mutations in BRCA1 and BRCA2 genes. METHODS AND RESULTS We designed nine pairs of probes and nine pairs of primers to amplify synchronically nine regions of the BRCA1/BRCA2 genes by real-time PCR, in order to identify the nine founder mutations through allelic discrimination analyses. Technical validation was performed using 90 positive and 90 negative samples for each mutation. The methodology was tested in a second group of 60 patients. Our method correctly classified carriers and non-carriers of one of the nine Chilean founder mutations with a 100% specificity and 100% sensitivity, compared with Sanger sequencing performance. CONCLUSIONS We develop an inexpensive, simple, and fast mutation detection method that could be implemented locally in Hospitals from the Private to Public health system. This methodology may be useful for the screening of BRCA1 and BRCA2 mutations in other populations.
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Ren M, Orozco A, Shao K, Albanez A, Ortiz J, Cao B, Wang L, Barreda L, Alvarez CS, Garland L, Wu D, Chung CC, Wang J, Frone M, Ralon S, Argueta V, Orozco R, Gharzouzi E, Dean M. Germline variants in hereditary breast cancer genes are associated with early age at diagnosis and family history in Guatemalan breast cancer. Breast Cancer Res Treat 2021; 189:533-539. [PMID: 34196900 PMCID: PMC8357728 DOI: 10.1007/s10549-021-06305-5] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2021] [Accepted: 06/18/2021] [Indexed: 12/24/2022]
Abstract
Purpose Mutations in hereditary breast cancer genes play an important role in the risk for cancer. Methods Cancer susceptibility genes were sequenced in 664 unselected breast cancer cases from Guatemala. Variants were annotated with ClinVar and VarSome. Results A total of 73 out of 664 subjects (11%) had a pathogenic variant in a high or moderate penetrance gene. The most frequently mutated genes were BRCA1 (37/664, 5.6%) followed by BRCA2 (15/664, 2.3%), PALB2 (5/664, 0.8%), and TP53 (5/664, 0.8%). Pathogenic variants were also detected in the moderate penetrance genes ATM, BARD1, CHEK2, and MSH6. The high ratio of BRCA1/BRCA2 mutations is due to two potential founder mutations: BRCA1 c.212 + 1G > A splice mutation (15 cases) and BRCA1 c.799delT (9 cases). Cases with pathogenic mutations had a significantly earlier age at diagnosis (45 vs 51 years, P < 0.001), are more likely to have had diagnosis before menopause, and a higher percentage had a relative with any cancer (51% vs 37%, P = 0.038) or breast cancer (33% vs 15%, P < 0.001). Conclusions Hereditary breast cancer mutations were observed among Guatemalan women, and these women are more likely to have early age at diagnosis and family history of cancer. These data suggest the use of genetic testing in breast cancer patients and those at high risk as part of a strategy to reduce breast cancer mortality in Guatemala. Supplementary Information The online version contains supplementary material available at 10.1007/s10549-021-06305-5.
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Affiliation(s)
- Megan Ren
- Division of Cancer Epidemiology and Genetics, National Cancer Institute, NIH, Gaithersburg, MD, USA
| | - Anali Orozco
- Instituto Cancerologia, Guatemala City, Guatemala
| | - Kang Shao
- BGI-Shenzhen, Beishan Industrial Zone, Shenzhen, 518083, People's Republic of China
| | | | - Jeremy Ortiz
- Instituto Cancerologia, Guatemala City, Guatemala
| | - Boyang Cao
- BGI-Shenzhen, Beishan Industrial Zone, Shenzhen, 518083, People's Republic of China
| | - Lusheng Wang
- City University of Hong Kong Shenzhen Research Institute, Shenzhen, People's Republic of China.,Department of Computer Science, City University of Hong Kong, Kowloon, SAR, Hong Kong, People's Republic of China
| | - Lilian Barreda
- Hospital General San Juan de Dios, Guatemala City, Guatemala
| | - Christian S Alvarez
- Division of Cancer Epidemiology and Genetics, National Cancer Institute, NIH, Gaithersburg, MD, USA
| | - Lisa Garland
- Cancer Genetics Research Laboratory, Division of Cancer Epidemiology and Genetics, Frederick National Laboratory for Cancer Research, Gaithersburg, MD, USA
| | - Dongjing Wu
- Cancer Genetics Research Laboratory, Division of Cancer Epidemiology and Genetics, Frederick National Laboratory for Cancer Research, Gaithersburg, MD, USA
| | - Charles C Chung
- Cancer Genetics Research Laboratory, Division of Cancer Epidemiology and Genetics, Frederick National Laboratory for Cancer Research, Gaithersburg, MD, USA.,Office of Biostatistics and Epidemiology (OBE), Center for Biologics Evaluation and Research (CBER), Food and Drug Administration (FDA), Silver Spring, MD , 20993-0002, USA
| | - Jiahui Wang
- Cancer Genetics Research Laboratory, Division of Cancer Epidemiology and Genetics, Frederick National Laboratory for Cancer Research, Gaithersburg, MD, USA
| | - Megan Frone
- Division of Cancer Epidemiology and Genetics, National Cancer Institute, NIH, Gaithersburg, MD, USA
| | - Sergio Ralon
- Hospital General San Juan de Dios, Guatemala City, Guatemala
| | - Victor Argueta
- Hospital General San Juan de Dios, Guatemala City, Guatemala
| | - Roberto Orozco
- Hospital General San Juan de Dios, Guatemala City, Guatemala.
| | | | - Michael Dean
- Division of Cancer Epidemiology and Genetics, National Cancer Institute, NIH, Gaithersburg, MD, USA.
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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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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
| | - Nutan V Badgujar
- 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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Shaw T, Chan SH, Teo JX, Chong ST, Li ST, Courtney E, Ishak D, Sankar H, Ang ZLT, Chiang J, Loh M, Zhou L, Lee SC, Yeh HY, Kolinjivadi AM, Lim WK, Ngeow J. Investigation into the origins of an ancient BRCA1 founder mutation identified among Chinese families in Singapore. Int J Cancer 2020; 148:637-645. [PMID: 32745242 DOI: 10.1002/ijc.33241] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2020] [Revised: 07/03/2020] [Accepted: 07/13/2020] [Indexed: 11/07/2022]
Abstract
Identification of ancestry-specific pathogenic variants is imperative for diagnostic, treatment, management and prevention strategies, and to understand penetrance/modifiers on risk. Our study aimed to determine the clinical significance of a recurrent BRCA1 c.442-22_442-13del variant of unknown significance identified among 13 carriers from six Chinese families, all with a significant history of breast and/or ovarian cancer. We further aimed to establish whether this was due to a founder effect and explore its origins. Haplotype analysis, using nine microsatellite markers encompassing 2.5 megabase pairs around the BRCA1 locus, identified a common haploblock specific to the variant carriers, confirming a founder effect. Variant age was estimated to date back 77.9 generations to 69 bc using the Gamma approach. On principal component analysis using single nucleotide polymorphisms merged with 1000 Genomes dataset, variant carriers were observed to overlap predominantly with the southern Han Chinese population. To determine pathogenicity of the variant, we assessed the functional effect on RAD51 foci formation as well as replication fork stability upon induction of DNA damage and observed an impaired DNA repair response associated with the variant. In summary, we identified an ancient Chinese founder mutation dating back 77.9 generations, possibly common among individuals of southern Han Chinese descent. Using evidence from phenotypic/family history studies, segregation analysis and functional characterization, the BRCA1 variant was reclassified from uncertain significance to pathogenic.
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Affiliation(s)
- Tarryn Shaw
- Cancer Genetics Service, Division of Medical Oncology, National Cancer Centre Singapore, Singapore
| | - Sock Hoai Chan
- Cancer Genetics Service, Division of Medical Oncology, National Cancer Centre Singapore, Singapore
| | - Jing Xian Teo
- SingHealth Duke-NUS Institute of Precision Medicine, Singapore
| | - Siao Ting Chong
- Cancer Genetics Service, Division of Medical Oncology, National Cancer Centre Singapore, Singapore
| | - Shao-Tzu Li
- Cancer Genetics Service, Division of Medical Oncology, National Cancer Centre Singapore, Singapore
| | - Eliza Courtney
- Cancer Genetics Service, Division of Medical Oncology, National Cancer Centre Singapore, Singapore
| | - Diana Ishak
- Cancer Genetics Service, Division of Medical Oncology, National Cancer Centre Singapore, Singapore
| | - Haresh Sankar
- Lee Kong Chian School of Medicine, Nanyang Technological University, Singapore
| | - Zoe Li Ting Ang
- Cancer Genetics Service, Division of Medical Oncology, National Cancer Centre Singapore, Singapore
| | - Jianbang Chiang
- Cancer Genetics Service, Division of Medical Oncology, National Cancer Centre Singapore, Singapore
| | - Marie Loh
- Lee Kong Chian School of Medicine, Nanyang Technological University, Singapore.,Department of Epidemiology and Biostatistics, Imperial College London, London, UK
| | - Li Zhou
- Lee Kong Chian School of Medicine, Nanyang Technological University, Singapore
| | - Soo Chin Lee
- Department of Haematology-Oncology, National University Cancer Institute Singapore, Singapore
| | - Hui-Yuan Yeh
- Lee Kong Chian School of Medicine, Nanyang Technological University, Singapore
| | | | - Weng Khong Lim
- SingHealth Duke-NUS Institute of Precision Medicine, Singapore
| | - Joanne Ngeow
- Cancer Genetics Service, Division of Medical Oncology, National Cancer Centre Singapore, Singapore.,Lee Kong Chian School of Medicine, Nanyang Technological University, Singapore
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Frequency of mutations in BRCA genes and other candidate genes in high-risk probands or probands with breast or ovarian cancer in the Czech Republic. Mol Biol Rep 2020; 47:2763-2769. [PMID: 32180084 DOI: 10.1007/s11033-020-05378-7] [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: 11/21/2019] [Accepted: 03/12/2020] [Indexed: 01/08/2023]
Abstract
Breast cancer is currently the most common form of malignant tumour in womenboth in the Czech Republic and in most countries of the western world, and its incidence is constantly increasing. Many risk factors are known to play a major role in the development of this form of cancer. One of them is genetics, especially the BRCA1/2 genes. A higher risk of ovarian cancer is also associated with these genes. With the development of laboratory diagnostics massive parallel sequencing methods (NGS) are now routinely employed, enabling the detection of other pathogenic sequence variants, or variants of uncertain significance (VUS) not previously detected. Besides the high penetrance BRCA1/2 genes, medium and low penetrant genes also come to the fore. There were 2046 probands examined in the study, men and women, mainly from eastern part of the Czech Republic. These were selected for a genetic examination, after meeting indication criteria (probands from high-risk families or with breast or ovarian cancer). From this group only women, 2033 probands, were selected and were given a genetic examination for the possible presence of patogenic sequence variants in BRCA1/2 genes, or other candidate genes. Analyses were conducted in the laboratory using DHPLC or next generation sequencing. MLPA method is used for large rearrangements in genes. From all examined women 212 mutations were detected. The most mutations (128) were found in the BRCA1 gene (60%). In the BRCA2 gene 71 mutations (34%) were found and 13 more mutations (6%) were detected in another candidate genes (CHEK2, PALB2, ERCC4). The most frequent sequence variant was c.5266dupC in the BRCA1 gene. The results show that 72% of women with a confirmed mutation in the BRCA1 gene and 77.5% of women with the sequence variant BRCA2, already had breast cancer and 16.4% of women with BRCA1 and 7% of women with BRCA2 already had ovarian cancer. Only 21 high risk families used the possibility to be tested and had undergone targeted mutation testing. The study results suggest a reflection of the causes and needs for examination of patients and women predisposed to breast or ovarian cancer.
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Breast cancer in six families from Tolima and Huila: BRCA1 3450del4 mutation. ACTA ACUST UNITED AC 2020; 40:185-194. [PMID: 32220173 PMCID: PMC7357381 DOI: 10.7705/biomedica.4673] [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: 08/16/2018] [Indexed: 12/22/2022]
Abstract
Introducción. El cáncer de mama es un problema mundial de salud pública; entre el 5 y el 10 % de los casos presentan agregación familiar, lo que se explicaría por la presencia de mutaciones en genes de alto riesgo como el BRCA1 y el BRCA2. El origen fundador de la deleción BRCA1 3450del4 en Colombia ya fue reportado. Objetivo. Hacer un análisis descriptivo de seis familias del del Tolima y del Huila con la deleción BRCA1 3450del4 de la asociación de la mutación germinal, con el cáncer de mama y la agregación familiar. Materiales y métodos. Se hizo un estudio descriptivo y transversal de seis casos índice con cáncer de mama positivos para BRCA1 3450del4, que cumplían tres de los criterios establecidos por Jalkh, et al. A partir de la información de las entrevistas, se realizaron los árboles genealógicos (GenoPro™, versión 2016). Se tipificó la mutación en familiares sanos y afectados que aceptaron participar. Resultados. De los 78 individuos seleccionados por conveniencia en las seis familias, 30 presentaron la mutación BRCA1 3450del4; de ellos, seis tenían cáncer de mama, uno, cáncer de ovario, uno, cáncer de mama y ovario, y otro, cáncer de próstata; 21 no presentaban neoplasias. De los 30 individuos portadores de la variante patogénica, seis eran hombres y 24 mujeres, 13 de ellas menores de 30 años. Conclusiones. En este estudio se confirmó la asociación de la deleción BRCA1 3450del4 con el cáncer de mama de agregación familiar.
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Urbina-Jara LK, Rojas-Martinez A, Martinez-Ledesma E, Aguilar D, Villarreal-Garza C, Ortiz-Lopez R. Landscape of Germline Mutations in DNA Repair Genes for Breast Cancer in Latin America: Opportunities for PARP-Like Inhibitors and Immunotherapy. Genes (Basel) 2019; 10:E786. [PMID: 31658756 PMCID: PMC6827033 DOI: 10.3390/genes10100786] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2019] [Revised: 09/28/2019] [Accepted: 10/04/2019] [Indexed: 12/24/2022] Open
Abstract
Germline mutations in BRCA1 and BRCA2 (BRCA1/2) genes are present in about 50% of cases of hereditary breast cancer. Proteins encoded by these genes are key players in DNA repair by homologous recombination (HR). Advances in next generation sequencing and gene panels for breast cancer testing have generated a large amount of data on gene variants implicated in hereditary breast cancer, particularly in genes such as PALB2, ATM, CHEK2, RAD51, MSH2, and BARD1. These genes are involved in DNA repair. Most of these variants have been reported for Caucasian, Jewish, and Asian population, with few reports for other communities, like those in Latin American (LA) countries. We reviewed 81 studies from 11 LA countries published between 2000 and 2019 but most of these studies focused on BRCA1/2 genes. In addition to these genes, breast cancer-related variants have been reported for PALB2, ATM, CHEK2, BARD1, MLH1, BRIP1, MSH2, NBN, MSH6, and PMS2 genes. Some of these variants are unique to LA populations. This analysis may contribute to enhance breast cancer variant characterization, and thus to find therapies and implement precision medicine for LA communities.
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Affiliation(s)
- Laura Keren Urbina-Jara
- Tecnologico de Monterrey, Escuela de Medicina y Ciencias de la Salud, Monterrey 64710, Mexico.
| | - Augusto Rojas-Martinez
- Tecnologico de Monterrey, Escuela de Medicina y Ciencias de la Salud, Monterrey 64710, Mexico.
| | | | - Dione Aguilar
- Tecnologico de Monterrey, Escuela de Medicina y Ciencias de la Salud, Monterrey 64710, Mexico.
- Tecnologico de Monterrey, Centro de Cancer de Mama, Hospital Zambrano Hellion, San Pedro Garza Garcia 66278, Mexico.
| | - Cynthia Villarreal-Garza
- Tecnologico de Monterrey, Centro de Cancer de Mama, Hospital Zambrano Hellion, San Pedro Garza Garcia 66278, Mexico.
- Instituto Nacional de Cancerologia, Departamento de Investigacion, Av. San Fernando #22, Tlalpan, Ciudad de Mexico 14080, Mexico.
| | - Rocio Ortiz-Lopez
- Tecnologico de Monterrey, Escuela de Medicina y Ciencias de la Salud, Monterrey 64710, Mexico.
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Cifuentes-C L, Rivera-Herrera AL, Barreto G. BRCA1 and BRCA2 mutations in a sample of breast and ovarian cancer families from the Colombian pacific. Colomb Med (Cali) 2019; 50:163-175. [PMID: 32284662 PMCID: PMC7141151 DOI: 10.25100/cm.v50i3.2385] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
Abstract
Introduction: Breast cancer is the most common neoplasia of women from all over the world especially women from Colombia. 5%10% of all cases are caused by hereditary factors, 25% of those cases have mutations in the BRCA1/BRCA2 genes. Objective: The purpose of this study was to identify the mutations associated with the risk of familial breast and/or ovarian cancer in a population of Colombian pacific. Methods: 58 high-risk breast and/or ovarian cancer families and 20 controls were screened for germline mutations in BRCA1 and BRCA2, by Single Strand Conformation Polymorphism (SSCP) and sequencing. Results: Four families (6.9%) were found to carry BRCA1 mutations and eight families (13.8%) had mutations in BRCA2. In BRCA1, we found three Variants of Uncertain Significance (VUS), of which we concluded, using in silico tools, that c.8112C>G and c.3119G>A (p.Ser1040Asn) are probably deleterious, and c.3083G>A (p.Arg1028His) is probably neutral. In BRCA2, we found three variants of uncertain significance: two were previously described and one novel mutation. Using in silico analysis, we concluded that c.865A>G (p.Asn289Asp) and c.6427T>C (p.Ser2143Pro) are probably deleterious and c.125A>G (p.Tyr42Cys) is probably neutral. Only one of them has previously been reported in Colombia. We also identified 13 polymorphisms (4 in BRCA1 and 9 in BRCA2), two of them are associated with a moderate increase in breast cancer risk (BRCA2 c.1114A>C and c.875566T>C). Conclusion: According to our results, the Colombian pacific population presents diverse mutational spectrum for BRCA genes that differs from the findings in other regions in the country.
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Affiliation(s)
- Laura Cifuentes-C
- Universidad del Valle, Departamento de Biología, Human Molecular Genetics Lab, Cali, Colombia
| | | | - Guillermo Barreto
- Universidad del Valle, Departamento de Biología, Human Molecular Genetics Lab, Cali, Colombia
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12
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Millan Catalan O, Campos-Parra AD, Vázquez-Romo R, Cantú de León D, Jacobo-Herrera N, Morales-González F, López-Camarillo C, Rodríguez-Dorantes M, López-Urrutia E, Pérez-Plasencia C. A Multi-Center Study of BRCA1 and BRCA2 Germline Mutations in Mexican-Mestizo Breast Cancer Families Reveals Mutations Unreported in Latin American Population. Cancers (Basel) 2019; 11:E1246. [PMID: 31454914 PMCID: PMC6769960 DOI: 10.3390/cancers11091246] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2019] [Revised: 08/12/2019] [Accepted: 08/19/2019] [Indexed: 12/24/2022] Open
Abstract
The presence of germline and somatic deleterious mutations in the BRCA1 and BRCA2 genes has important clinical consequences for breast cancer (BC) patients. Analysis of the mutational status in BRCA genes is not yet common in public Latin American institutions; thus, our objective was to implement high-performance technology with highly reliable results with the possibility of analyzing several patients simultaneously, therefore reducing cost and work time. A prospective cohort of 252 unrelated sporadic breast cancer patients from the Mexican-mestizo population were analyzed using next generation sequencing (NGS) based on ion semiconductor sequencing. We found 28 pathogenic mutations (25 in BRCA1 and 13 in BRCA2), 11 of which had not been reported previously in Hispanic or Latin American populations. A total of 38 patients were positive for a pathogenic mutation representing 15% of our Mexican women cohort with breast cancer; 25 for BRCA1; and 13 for BRCA2. Our results revealed that there are mutations not analyzed by mutations panels, and our findings support the suitability of massive sequencing approaches in the public institutions of developing countries. Hence, BRCA screening should be offered to patients with breast cancer regardless of their family history of cancer in order to identify unaffected family carriers.
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Affiliation(s)
- Oliver Millan Catalan
- Laboratorio de Genómica, Instituto Nacional de Cancerología (INCan). Av. San Fernando 22, Col. Sección XVI, C.P. Tlalpan, Ciudad de México 14080, Mexico
| | - Alma D Campos-Parra
- Laboratorio de Genómica, Instituto Nacional de Cancerología (INCan). Av. San Fernando 22, Col. Sección XVI, C.P. Tlalpan, Ciudad de México 14080, Mexico
| | - Rafael Vázquez-Romo
- Departamento de Cirugía de Tumores Mamarios, Instituto Nacional de Cancerología (INCan), Av. San Fernando 22, Col. Sección XVI, C.P. Tlalpan, Ciudad de México 14080, Mexico
| | - David Cantú de León
- Dirección de Investigación, Instituto Nacional de Cancerología (INCan), Av. San Fernando 22, Col. Sección XVI, C.P. Tlalpan, Ciudad de México14080, Mexico
| | - Nadia Jacobo-Herrera
- Unidad de Bioquímica, Instituto Nacional de Ciencias Médicas y Nutrición, Salvador Zubirán (INCMNSZ), Av. Vasco de Quiroga 15, Col Belisario Dominguez. C.P. Tlalpan, Ciudad de México 14080, Mexico
| | - Fermín Morales-González
- Instituto Jalisciense de Cancerología. Coronel Calderón 715, Guadalajara 44280, Jalisco, Mexico
| | - César López-Camarillo
- Posgrado en Ciencias Genómicas, Universidad Autónoma de la Ciudad de México, San Lorenzo 290, Del Valle Sur, Benito Juarez, Ciudad de México 03100, Mexico
| | | | - Eduardo López-Urrutia
- Laboratorio de Genómica, Unidad de Biomedicina, FES-IZTACALA, UNAM, Tlalnepantla 54090, Mexico.
| | - Carlos Pérez-Plasencia
- Laboratorio de Genómica, Instituto Nacional de Cancerología (INCan). Av. San Fernando 22, Col. Sección XVI, C.P. Tlalpan, Ciudad de México 14080, Mexico.
- Laboratorio de Genómica, Unidad de Biomedicina, FES-IZTACALA, UNAM, Tlalnepantla 54090, Mexico.
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13
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Cortés C, Rivera AL, Trochez D, Solarte M, Gómez D, Cifuentes L, Barreto G. Mutational analysis of BRCA1 and BRCA2 genes in women with familial breast cancer from different regions of Colombia. Hered Cancer Clin Pract 2019; 17:20. [PMID: 31341521 PMCID: PMC6631644 DOI: 10.1186/s13053-019-0120-x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2019] [Accepted: 07/04/2019] [Indexed: 12/17/2022] Open
Abstract
Purpose The main risk factor for familial breast cancer is the presence of mutations in BRCA1 and BRCA2 genes. The prevalence of mutations in these genes is heterogeneous and varies according to geographical origin of studied families. In Colombia mutations in these genes have been mainly studied on patients from Andean region. Bogotá and Medellin presented its own battery of mutations. This study aims to identify mutations in BRCA1–2 genes in women with familial breast cancer from different regions of Colombia. Methods One hundred four families with a history of breast cancer were sampled in different regions of Colombia, and the BRCA1 gene and exon 11 of the BRCA2 gene were sequenced. To predict the possible effects of sequence alterations found in protein function, different bioinformatics tools were used. Results A total of 33 variants were found; 18 in BRCA1 and 15 in BRCA2, of which 15 are unique variants of Colombia. In silico analysis established that alterations p.Thr790Ala, p.Arg959Lys and p.Glu1345Lys in the BRCA1 gene and variants p.Leu771Phe, p.Asn818Lys, p.Val859Ser*22 and p.Lys1032Ile in the BRCA2 gene are considered likely pathogenic. Both the mutations as the variants of unknown clinical significance, in their great majority, presented a specific region distribution and they were different from those reported in previous studies. Conclusions In this study we report the BRCA1 and BRCA2 spectrum of mutations and their distribution by regions in Colombia. Our results may help to design a diagnostic test including recurrent mutations for screening high risk to breast cancer families in Colombia.
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Affiliation(s)
- Carolina Cortés
- 1Human Molecular Genetics Lab, Department of Biology, Universidad del Valle, Calle 13 No. 100-00 AA, 25360 Cali, Colombia
| | - Ana Lucía Rivera
- 1Human Molecular Genetics Lab, Department of Biology, Universidad del Valle, Calle 13 No. 100-00 AA, 25360 Cali, Colombia
| | - David Trochez
- 1Human Molecular Genetics Lab, Department of Biology, Universidad del Valle, Calle 13 No. 100-00 AA, 25360 Cali, Colombia
| | - Melissa Solarte
- 1Human Molecular Genetics Lab, Department of Biology, Universidad del Valle, Calle 13 No. 100-00 AA, 25360 Cali, Colombia
| | - Daniela Gómez
- 2Faculty of Sciences, Universidad Nacional Sede Manizales, Carrera 27 # 64-60, Manizales, Colombia
| | - Laura Cifuentes
- Health Sciences, Universidad Cooperativa de Colombia Nariño, Calle 18 No. 47-150, Pasto, Colombia
| | - Guillermo Barreto
- 1Human Molecular Genetics Lab, Department of Biology, Universidad del Valle, Calle 13 No. 100-00 AA, 25360 Cali, Colombia
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14
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Dallagassa MR, Iachecen F, Carvalho DR, Ioshii SO. Design of a geospatial model applied to Health management. Rev Bras Enferm 2019; 72:420-426. [PMID: 31017205 DOI: 10.1590/0034-7167-2018-0589] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2018] [Accepted: 09/04/2018] [Indexed: 11/22/2022] Open
Abstract
OBJECTIVE To identify geographically the beneficiaries categorized as prone to Type 2 Diabetes Mellitus, using the recognition of patterns in a database of a health plan operator, through data mining. METHOD The following steps were developed: the initial step, the information survey. Development, construction of the process of extraction, transformation, and loading of the database. Deployment, presentation of the geographical information through a georeferencing tool. RESULTS As a result, the mapping of Paraná according to its health care network and the concentration of Type 2 Diabetes Mellitus is presented, enabling the identification of cause-and-effect relationships. CONCLUSION It is concluded that the analysis of georeferenced information, linked to health information obtained through the data mining technique, can be an excellent tool for the health management of a health plan operator, contributing to the decision-making process in Health.
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Affiliation(s)
- Marcelo Rosano Dallagassa
- Pontifícia Universidade Católica do Paraná. Curitiba-PR, Brasil.,Unimed Federação do Estado do Paraná, Core of Health Intelligence. Curitiba-PR, Brasil
| | - Franciele Iachecen
- Unimed Federação do Estado do Paraná, Core of Health Intelligence. Curitiba-PR, Brasil
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15
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Abstract
Cancer is a common non-communicable disease worldwide, although it exhibits differential population trends in incidence and mortality rates. The differences relate to population structure, environmental risk factors as well as health system organization. This article discusses the potential impact of genetic testing on population health, focusing in particular on the mutational spectrum of breast cancer susceptibility genes in diverse populations. We identify the need for improved access to, and increased investment in, comprehensive cancer risk assessment and genetic testing as well as cancer control measures that take into account lifestyle, environmental, and social factors in understudied minority groups.
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16
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Zavala VA, Serrano-Gomez SJ, Dutil J, Fejerman L. Genetic Epidemiology of Breast Cancer in Latin America. Genes (Basel) 2019; 10:E153. [PMID: 30781715 PMCID: PMC6410045 DOI: 10.3390/genes10020153] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2018] [Revised: 02/13/2019] [Accepted: 02/14/2019] [Indexed: 12/20/2022] Open
Abstract
The last 10 years witnessed an acceleration of our understanding of what genetic factors underpin the risk of breast cancer. Rare high- and moderate-penetrance variants such as those in the BRCA genes account for a small proportion of the familial risk of breast cancer. Low-penetrance alleles are expected to underlie the remaining heritability. By now, there are about 180 genetic polymorphisms that are associated with risk, most of them of modest effect. In combination, they can be used to identify women at the lowest or highest ends of the risk spectrum, which might lead to more efficient cancer prevention strategies. Most of these variants were discovered in populations of European descent. As a result, we might be failing to discover additional polymorphisms that could explain risk in other groups. This review highlights breast cancer genetic epidemiology studies conducted in Latin America, and summarizes the information that they provide, with special attention to similarities and differences with studies in other populations. It includes studies of common variants, as well as moderate- and high-penetrance variants. In addition, it addresses the gaps that need to be bridged in order to better understand breast cancer genetic risk in Latin America.
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Affiliation(s)
- Valentina A Zavala
- Department of Medicine, Division of General Internal Medicine, University of California San Francisco, San Francisco, CA 94143-1793, USA.
| | - Silvia J Serrano-Gomez
- Grupo de investigación en biología del cáncer, Instituto Nacional de Cancerología, Bogotá 11001000, Colombia.
| | - Julie Dutil
- Cancer Biology Division, Ponce Research Institute, Ponce Health Sciences University, Ponce, PR 00732, USA.
| | - Laura Fejerman
- Department of Medicine, Division of General Internal Medicine, University of California San Francisco, San Francisco, CA 94143-1793, USA.
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17
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Vaccaro CA, López-Kostner F, Adriana DV, Palmero EI, Rossi BM, Antelo M, Solano A, Carraro DM, Forones NM, Bohorquez M, Lino-Silva LS, Buleje J, Spirandelli F, Abe-Sandes K, Nascimento I, Sullcahuaman Y, Sarroca C, Gonzalez ML, Herrando AI, Alvarez K, Neffa F, Galvão HC, Esperon P, Golubicki M, Cisterna D, Cardoso FC, Torrezan GT, Junior SA, Pimenta CAM, da Cruz Formiga MN, Santos E, Sá CU, Oliveira EP, Fujita R, Spirandelli E, Jimenez G, Guindalini RSC, de Azevedo RGMV, Bueno LSM, Dos Santos Nogueira ST, Loarte MT, Padron J, Del Carmen Castro-Mujica M, Del Monte JS, Caballero C, Peña CMM, Pinto J, Barletta-Carrillo C, Melva GA, Piñero T, Beltran PM, Ashton-Prolla P, Rodriguez Y, Quispe R, Rossi NT, Martin C, Chialina S, Kalfayan PG, Bazo-Alvarez JC, Cañete AR, Dominguez-Barrera C, Nuñez L, Da Silva SD, Balavarca Y, Wernhoff P, Plazzer JP, Møller P, Hovig E, Dominguez-Valentin M. From colorectal cancer pattern to the characterization of individuals at risk: Picture for genetic research in Latin America. Int J Cancer 2018; 145:318-326. [PMID: 30303536 PMCID: PMC6587543 DOI: 10.1002/ijc.31920] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2018] [Revised: 09/14/2018] [Accepted: 09/19/2018] [Indexed: 12/14/2022]
Abstract
Colorectal cancer (CRC) is one of the most common cancers in Latin America and the Caribbean, with the highest rates reported for Uruguay, Brazil and Argentina. We provide a global snapshot of the CRC patterns, how screening is performed, and compared/contrasted to the genetic profile of Lynch syndrome (LS) in the region. From the literature, we find that only nine (20%) of the Latin America and the Caribbean countries have developed guidelines for early detection of CRC, and also with a low adherence. We describe a genetic profile of LS, including a total of 2,685 suspected families, where confirmed LS ranged from 8% in Uruguay and Argentina to 60% in Peru. Among confirmed LS, path_MLH1 variants were most commonly identified in Peru (82%), Mexico (80%), Chile (60%), and path_MSH2/EPCAM variants were most frequently identified in Colombia (80%) and Argentina (47%). Path_MSH6 and path_PMS2 variants were less common, but they showed important presence in Brazil (15%) and Chile (10%), respectively. Important differences exist at identifying LS families in Latin American countries, where the spectrum of path_MLH1 and path_MSH2 variants are those most frequently identified. Our findings have an impact on the evaluation of the patients and their relatives at risk for LS, derived from the gene affected. Although the awareness of hereditary cancer and genetic testing has improved in the last decade, it is remains deficient, with 39%–80% of the families not being identified for LS among those who actually met both the clinical criteria for LS and showed MMR deficiency.
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Affiliation(s)
- Carlos Alberto Vaccaro
- PROCANHE- Instituto de Medicina Traslacional e Ingeniería Biomédica (IMTIB)-CONICET, Instituto Universitario del Hospital Italiano (IUHI), Hospital Italiano de Buenos Aires, Buenos Aires, Argentina
| | | | - Della Valle Adriana
- Hospital Fuerzas Armadas, Grupo Colaborativo Uruguayo, Investigación de Afecciones Oncológicas Hereditarias (GCU), Montevideo, Uruguay
| | - Edenir Inez Palmero
- Molecular Oncology Research Center, Barretos Cancer Hospital, Brazil & Barretos School of Health Sciences - FACISB, Barretos, SP, Brazil
| | | | - Marina Antelo
- Oncology Section of the Public Hospital of Gastroenterology "Dr. C. B. Udaondo", Buenos Aires, Argentina.,Instituto de Salud Colectiva, Universidad Nacional de Lanús, Buenos Aires, Argentina
| | - Angela Solano
- Sección de Genotipificación, Departamento de Análisis Clínicos, Centro de Educación Médica e Investigaciones Clínicas (CEMIC), Buenos Aires, Argentina
| | | | - Nora Manoukian Forones
- Gastroenterology Division, Universidade Federal de São Paulo (UNIFESP), São Paulo, Brazil
| | - Mabel Bohorquez
- Grupo de Investigación Citogenética, Filogenia y Evolución de Poblaciones, Facultades de Ciencias y de Ciencias de Salud, Universidad del Tolima, Ibagué, Colombia
| | | | - Jose Buleje
- Centro de Genética y Biología Molecular, Instituto de Investigación, Facultad de Medicina Humana, Universidad de San Martín de Porres, Lima, Perú
| | - Florencia Spirandelli
- Servicio de Coloproctologia y Asesoria Genetica en Cancer, Hospital Español de Rosario, Rosario, Argentina
| | - Kiyoko Abe-Sandes
- Instituto de Ciências da Saúde, Universidade Federal da Bahia, Salvador, Brazil
| | - Ivana Nascimento
- Instituto de Ciência da Saúde e Núcleo de Oncologia da Bahia, Salvador, Brazil
| | - Yasser Sullcahuaman
- Universidad Peruana de Ciencias Aplicadas, Lima, Peru.,Instituto de Investigación Genomica, Lima, Peru
| | - Carlos Sarroca
- Hospital Fuerzas Armadas, Grupo Colaborativo Uruguayo, Investigación de Afecciones Oncológicas Hereditarias (GCU), Montevideo, Uruguay
| | - Maria Laura Gonzalez
- PROCANHE- Instituto de Medicina Traslacional e Ingeniería Biomédica (IMTIB)-CONICET, Instituto Universitario del Hospital Italiano (IUHI), Hospital Italiano de Buenos Aires, Buenos Aires, Argentina
| | - Alberto Ignacio Herrando
- PROCANHE- Instituto de Medicina Traslacional e Ingeniería Biomédica (IMTIB)-CONICET, Instituto Universitario del Hospital Italiano (IUHI), Hospital Italiano de Buenos Aires, Buenos Aires, Argentina
| | - Karin Alvarez
- Laboratorio de Oncología y Genética Molecular, Clínica Los Condes, Santiago, Chile
| | - Florencia Neffa
- Hospital Fuerzas Armadas, Grupo Colaborativo Uruguayo, Investigación de Afecciones Oncológicas Hereditarias (GCU), Montevideo, Uruguay
| | - Henrique Camposreis Galvão
- Molecular Oncology Research Center, Barretos Cancer Hospital, Brazil & Barretos School of Health Sciences - FACISB, Barretos, SP, Brazil
| | - Patricia Esperon
- Hospital Fuerzas Armadas, Grupo Colaborativo Uruguayo, Investigación de Afecciones Oncológicas Hereditarias (GCU), Montevideo, Uruguay
| | - Mariano Golubicki
- Molecular Laboratory, Hospital of Gastroenterology "Dr. C. B. Udaondo", Buenos Aires, Argentina
| | - Daniel Cisterna
- Molecular Laboratory, Hospital of Gastroenterology "Dr. C. B. Udaondo", Buenos Aires, Argentina
| | - Florencia C Cardoso
- Sección de Genotipificación, Departamento de Análisis Clínicos, Centro de Educación Médica e Investigaciones Clínicas (CEMIC), Buenos Aires, Argentina
| | | | | | | | | | | | | | | | - Ricardo Fujita
- Centro de Genética y Biología Molecular, Instituto de Investigación, Facultad de Medicina Humana, Universidad de San Martín de Porres, Lima, Perú
| | - Enrique Spirandelli
- Servicio de Coloproctologia y Asesoria Genetica en Cancer, Hospital Español de Rosario, Rosario, Argentina
| | - Geiner Jimenez
- Hospital Dr. Rafael Angel Calderón Guardia, Caja Costarricense de Seguro Social, San Jose, Costa Rica
| | - Rodrigo Santa Cruz Guindalini
- Faculdade de Medicina-Universidade de São Paulo and Clínica de Oncologia/grupo (CLION), Clínica de Assistência à Mulher (CAM), Bahia, Brazil
| | | | - Larissa Souza Mario Bueno
- Complexo Hospital Universitário Professor Edgar Santos, Universidade Federal da Bahia, Bahia, Brazil
| | | | - Mariela Torres Loarte
- Universidad Peruana de Ciencias Aplicadas, Lima, Peru.,Instituto de Investigación Genomica, Lima, Peru
| | | | | | | | | | - Carlos Mario Muñeton Peña
- Unidad de Genética Médica, Departamento de Pediatría, Facultad de Medicina, Universidad de Antioquia, Medellín, Colombia
| | - Joseph Pinto
- Unidad de Investigación Básica y Traslacional, Oncosalud-AUNA, Lima, Peru
| | | | | | - Tamara Piñero
- PROCANHE- Instituto de Medicina Traslacional e Ingeniería Biomédica (IMTIB)-CONICET, Instituto Universitario del Hospital Italiano (IUHI), Hospital Italiano de Buenos Aires, Buenos Aires, Argentina.,IMTIB-Instituto Universitario Hospital Italiano de Buenos Aires, Buenos Aires, Argentina
| | | | - Patricia Ashton-Prolla
- Departamento de Genética da Universidade Federal do Rio Grande do Sul (UFRGS) e Serviço de Genética Médica do Hospital de Clinicas de Porto Alegre (HCPA) & Rede Brasileira de Câncer Hereditário, Porto Alegre, Brazil
| | | | - Richard Quispe
- Laboratorio de Genética Molecular del Instituto de Servicios de Laboratorio de Diagnóstico e Investigación en Salud (SELADIS), La Paz, Bolivia
| | | | - Claudia Martin
- Hospital Privado Universitario de Cordoba, Cordoba, Argentina
| | - Sergio Chialina
- Servicio de Coloproctologia y Asesoria Genetica en Cancer, Hospital Español de Rosario, Rosario, Argentina
| | - Pablo German Kalfayan
- PROCANHE- Instituto de Medicina Traslacional e Ingeniería Biomédica (IMTIB)-CONICET, Instituto Universitario del Hospital Italiano (IUHI), Hospital Italiano de Buenos Aires, Buenos Aires, Argentina
| | - Juan Carlos Bazo-Alvarez
- Research Department of Primary Care and Population Health, University College London, London, United Kingdom.,Centro de Estudios de Población, Universidad Católica los Ángeles de Chimbote (ULADECH-Católica), Chimbote, Perú
| | - Alcides Recalde Cañete
- Facultad de Ciencias Medicas Médicas, Universidad Nacional de Asunción, Asuncion, Paraguay
| | | | - Lina Nuñez
- National Institute of Cancer, Buenos Aires, Argentina
| | - Sabrina Daniela Da Silva
- Lady Davis Institute for Medical Research and Segal Cancer Center, Jewish General Hospital, Montreal, QC, Canada.,Department of Otolaryngology-Head and Neck Surgery, McGill University, Montreal, QC, Canada
| | - Yesilda Balavarca
- Division of Preventive Oncology, German Cancer Research Center and National Center for Tumor Diseases, Heidelberg, Germany
| | - Patrik Wernhoff
- Department of Tumor Biology, Institute for Cancer Research, Oslo University Hospital, Oslo, Norway
| | - John-Paul Plazzer
- Colorectal Medicine and Genetics, The Royal Melbourne Hospital, Melbourne, Australia.,Department of Medicine, Melbourne University, Melbourne, Australia
| | - Pål Møller
- Department of Tumor Biology, Institute for Cancer Research, Oslo University Hospital, Oslo, Norway.,Department of Medical Genetics, Oslo University Hospital, Oslo, Norway.,Department of Human Medicine, Universität Witten/Herdecke, Witten, Germany
| | - Eivind Hovig
- Department of Tumor Biology, Institute for Cancer Research, Oslo University Hospital, Oslo, Norway.,Institute of Cancer Genetics and Informatics, Oslo University Hospital, Oslo, Norway.,Department of Informatics, University of Oslo, Oslo, Norway
| | - Mev Dominguez-Valentin
- Department of Tumor Biology, Institute for Cancer Research, Oslo University Hospital, Oslo, Norway
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18
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Alvarez C, Tapia T, Perez-Moreno E, Gajardo-Meneses P, Ruiz C, Rios M, Missarelli C, Silva M, Cruz A, Matamala L, Carvajal-Carmona L, Camus M, Carvallo P. BRCA1 and BRCA2 founder mutations account for 78% of germline carriers among hereditary breast cancer families in Chile. Oncotarget 2017; 8:74233-74243. [PMID: 29088781 PMCID: PMC5650336 DOI: 10.18632/oncotarget.18815] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2017] [Accepted: 06/12/2017] [Indexed: 11/25/2022] Open
Abstract
Identifying founder mutations in BRCA1 and BRCA2 in specific populations constitute a valuable opportunity for genetic screening. Several studies from different populations have reported recurrent and/or founder mutations representing a relevant proportion of BRCA mutation carriers. In Latin America, only few founder mutations have been described. We screened 453 Chilean patients with hereditary breast cancer for mutations in BRCA1 and BRCA2. For recurrent mutations, we genotyped 11 microsatellite markers in BRCA1 and BRCA2 in order to determine a founder effect through haplotype analysis. We found a total of 25 mutations (6 novel) in 71 index patients among which, nine are present exclusively in Chilean patients. Our analysis revealed the presence of nine founder mutations, 4 in BRCA1 and 5 in BRCA2, shared by 2 to 10 unrelated families and spread in different regions of Chile. Our panel contains the highest amount of founder mutations until today and represents the highest percentage (78%) of BRCA1 and BRCA2 mutation carriers. We suggest that the dramatic reduction of Amerindian population due to smallpox and wars with Spanish conquerors, a scarce population increase during 300 years, and the geographic position of Chile constituted a favorable scenario to establish founder genetic markers in our population.
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Affiliation(s)
- Carolina Alvarez
- Department of Cell and Molecular Biology, Faculty of Biological Sciences, Pontificia Universidad Católica de Chile, Santiago, Chile
| | - Teresa Tapia
- Department of Cell and Molecular Biology, Faculty of Biological Sciences, Pontificia Universidad Católica de Chile, Santiago, Chile
| | - Elisa Perez-Moreno
- Department of Cell and Molecular Biology, Faculty of Biological Sciences, Pontificia Universidad Católica de Chile, Santiago, Chile
| | - Patricia Gajardo-Meneses
- Department of Cell and Molecular Biology, Faculty of Biological Sciences, Pontificia Universidad Católica de Chile, Santiago, Chile
| | - Catalina Ruiz
- Centro de Cáncer, Faculty of Medicine, Pontificia Universidad Católica de Chile, Santiago, Chile
| | - Mabel Rios
- Unidad de Patología Mamaria, Hospital Base de Valdivia, Valdivia, Chile
| | | | - Mariela Silva
- Unidad de Patología Mamaria, Hospital Base de Valdivia, Valdivia, Chile
| | - Adolfo Cruz
- Unidad de Patología Mamaria, Hospital Barros Luco Trudeau, Santiago, Chile
| | - Luis Matamala
- Unidad de Patología Mamaria, Hospital Regional de Antofagasta, Antofagasta, Chile
| | - Luis Carvajal-Carmona
- Genome Center and Department of Biochemistry and Molecular Medicine, School of Medicine, University of California, Davis, California, USA
| | - Mauricio Camus
- Centro de Cáncer, Faculty of Medicine, Pontificia Universidad Católica de Chile, Santiago, Chile
| | - Pilar Carvallo
- Department of Cell and Molecular Biology, Faculty of Biological Sciences, Pontificia Universidad Católica de Chile, Santiago, Chile
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Chavarri-Guerra Y, Blazer KR, Weitzel JN. Genetic Cancer Risk Assessment for Breast Cancer in Latin America. REVISTA DE INVESTIGACION CLINICA; ORGANO DEL HOSPITAL DE ENFERMEDADES DE LA NUTRICION 2017; 69:94-102. [PMID: 28453507 PMCID: PMC5658001 DOI: 10.24875/ric.17002195] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/26/2017] [Accepted: 03/14/2017] [Indexed: 12/14/2022]
Abstract
In Latin America, breast cancer is the most common malignancy in women, and limited available data suggest that up to 15% of all breast cancer cases in the region are hereditary. Genetic cancer risk assessment and counseling is a critical component of the appropriate clinical care of patients with hereditary breast cancer and their families. Unfortunately, genetic services are underdeveloped across Latin America, and access to genetic testing and counseling is very scarce in the region. Barriers contributing to the access to genetic care are high cost and lack of insurance coverage for genetic tests, insufficient oncogenetics training or expertise, nonexistence of genetic counseling as a clinical discipline, and lack of supportive healthcare policies. In this review, we highlight relevant initiatives undertaken in several Latin American countries aimed at creating genetic cancer risk assessment programs. Additionally, we present a review of the scientific literature on the current status of breast cancer genomics in Latin America, with specific emphasis on demographic indicators, access to cancer genetic care, training and strategies to improve outcomes, and international collaborations.
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Affiliation(s)
- Yanin Chavarri-Guerra
- Department of Hemato-Oncology, Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubiran, Mexico City, Mexico
- Division of Clinical Cancer Genomics, City of Hope Comprehensive Cancer Center, Duarte, CA, USA
| | - Kathleen Reilly Blazer
- Division of Clinical Cancer Genomics, City of Hope Comprehensive Cancer Center, Duarte, CA, USA
| | - Jeffrey Nelson Weitzel
- Division of Clinical Cancer Genomics, City of Hope Comprehensive Cancer Center, Duarte, CA, USA
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Cruz-Correa M, Pérez-Mayoral J, Dutil J, Echenique M, Mosquera R, Rivera-Román K, Umpierre S, Rodriguez-Quilichini S, Gonzalez-Pons M, Olivera MI, Pardo S. Hereditary cancer syndromes in Latino populations: genetic characterization and surveillance guidelines. Hered Cancer Clin Pract 2017; 15:3. [PMID: 28127413 PMCID: PMC5251307 DOI: 10.1186/s13053-017-0063-z] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2016] [Accepted: 01/05/2017] [Indexed: 12/17/2022] Open
Abstract
Hereditary cancer predisposition syndromes comprise approximately 10% of diagnosed cancers; however, familial forms are believed to account for up to 30% of some cancers. In Hispanics, the most commonly diagnosed hereditary cancers include colorectal cancer syndromes such as, Lynch Syndrome, Familial Adenomatous Polyposis, and hereditary breast and ovarian cancer syndromes. Although the incidence of hereditary cancers is low, patients diagnosed with hereditary cancer syndromes are at high-risk for developing secondary cancers. Furthermore, the productivity loss that occurs after cancer diagnosis in these high-risk patients has a negative socio-economic impact. This review summarizes the genetic basis, phenotype characteristics, and the National Comprehensive Cancer Network's screening, testing, and surveillance guidelines for the leading hereditary cancer syndromes. The aim of this review is to promote a better understanding of cancer genetics and genetic testing in Hispanic patients.
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Affiliation(s)
- Marcia Cruz-Correa
- Department of Cancer Biology, University of Puerto Rico Comprehensive Cancer Center, San Juan, PR USA
- University of Puerto Rico Medical Sciences Campus, School of Medicine, San Juan, PR USA
- University of Puerto Rico Comprehensive Cancer Center, PMB711 Ave. De Diego 89 Ste. 105, San Juan, PR 00927-6346 USA
| | - Julyann Pérez-Mayoral
- Department of Cancer Biology, University of Puerto Rico Comprehensive Cancer Center, San Juan, PR USA
- University of Puerto Rico Medical Sciences Campus, School of Medicine, San Juan, PR USA
| | - Julie Dutil
- Ponce Health Sciences University, Ponce Research Institute, Ponce, PR USA
| | | | | | - Keila Rivera-Román
- Department of Pediatrics, University of Puerto Rico School of Medicine, San Juan, PR USA
| | - Sharee Umpierre
- Department of Cancer Biology, University of Puerto Rico Comprehensive Cancer Center, San Juan, PR USA
| | | | - Maria Gonzalez-Pons
- Department of Cancer Biology, University of Puerto Rico Comprehensive Cancer Center, San Juan, PR USA
- University of Puerto Rico Medical Sciences Campus, School of Medicine, San Juan, PR USA
| | - Myrta I. Olivera
- Department of Cancer Biology, University of Puerto Rico Comprehensive Cancer Center, San Juan, PR USA
- University of Puerto Rico Medical Sciences Campus, School of Medicine, San Juan, PR USA
| | - Sherly Pardo
- Department of Pathology, University of Puerto Rico School of Medicine, San Juan, PR USA
| | - on behalf of the Puerto Rico Clinical Cancer Genetics Consortia
- Department of Cancer Biology, University of Puerto Rico Comprehensive Cancer Center, San Juan, PR USA
- University of Puerto Rico Medical Sciences Campus, School of Medicine, San Juan, PR USA
- Ponce Health Sciences University, Ponce Research Institute, Ponce, PR USA
- Cancer Center, Auxilio Mutuo Hospital, San Juan, PR USA
- Puerto Rico Gastroenterology Association, San Juan, PR USA
- Department of Pediatrics, University of Puerto Rico School of Medicine, San Juan, PR USA
- Department of Pathology, University of Puerto Rico School of Medicine, San Juan, PR USA
- University of Puerto Rico Comprehensive Cancer Center, PMB711 Ave. De Diego 89 Ste. 105, San Juan, PR 00927-6346 USA
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Ossa CA, Torres D. Founder and Recurrent Mutations in BRCA1 and BRCA2 Genes in Latin American Countries: State of the Art and Literature Review. Oncologist 2016; 21:832-9. [PMID: 27286788 DOI: 10.1634/theoncologist.2015-0416] [Citation(s) in RCA: 57] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2015] [Accepted: 03/07/2016] [Indexed: 12/20/2022] Open
Abstract
BACKGROUND Numerous epidemiological factors affect the probability of developing breast or ovarian cancer, but no predictor is as determinant as inheriting a mutation in BRCA1 or BRCA2. The concept of the founder effect explains the reduced genetic variability in some populations, according to the theory that new populations can be formed from a reduced number of individuals, so the new population would carry only a small fraction of the genetic variability of the original population. The main purpose of this review is to provide an update on the state of the art in founder mutations and some recurrent mutations that have recently been described in Latin America. METHODS A literature search was performed in the electronic databases of PUBMED, EMBASE, LILACS, and BIREME using the terms BRCA1, BRCA2, founder mutation, Latin American population, and Hispanic. Sixty-two papers were identified, of which 38 were considered relevant for this review. Each result is shown per country. RESULTS In Latin America, clear founder effects have been reported in Mexico (BRCA1 del exons 9-12), Brazil (BRCA1 5382insC and BRCA2 c.156_157insAlu), and Colombia (BRCA1 3450del4, A1708E, and BRCA2 3034del4) and in Latinas residing in Southern California (BRCA1 185delAG, IVS5+1G>A, S955x, and R1443x). Of these, mutation BRCA1 3450del4 has also been reported in Brazil and Chile, whereas mutation BRCA2 3034del4 has been reported in Argentina and Peru. These data support the idea that although most Hispanic populations are the result of a mixture between Europeans, Africans, and Amerindians, the relative proportion of each genetic component varies throughout the Hispanic populations, making it necessary to identify the mutations characteristic of each population to generate mutation profiles adjusted to each one of them. CONCLUSION In Latin American countries, and even among regions of the same country, there is great heterogeneity of ancestors. Therefore, Latinas should not be analyzed like other population groups without taking into account their genetic ancestry. The presence of founder mutations in specific population groups represents a cost-effective analysis. The importance of determining the founder mutations lies mainly in the decrease in costs. If we manage to decrease costs, screenings could be offered more widely and cover a larger number of women. IMPLICATIONS FOR PRACTICE Hispanic and African-American populations are four to five times less likely than other populations worldwide to receive screening for BRCA mutations, a main reason being the high costs of these tools. The present study seeks to identify the prevalent mutations and the founder effect in the BRCA gene in the Hispanic population to address specific panels for this population group in the future and develop strategies for population screening.
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Affiliation(s)
- Carlos Andrés Ossa
- Instituto Cancerología Las Americas, Medellín, Colombia Centro de Excelencia en Mama de Antioquia, Medellín, Colombia
| | - Diana Torres
- Institute of Human Genetics, Pontificia Universidad Javeriana, Bogotá, Colombia
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Sales Luiz Vianna F, Alemar B, Achatz MI, Camey SA, Ashton-Prolla P. Commentary regarding Schayek et al., entitled “The rate of recurrent BRCA1, BRCA2, and TP53 mutations in the general population, and unselected ovarian cancer cases, in Belo Horizonte, Brazil”. Cancer Genet 2016; 209:282-3. [DOI: 10.1016/j.cancergen.2016.04.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2016] [Revised: 03/24/2016] [Accepted: 04/04/2016] [Indexed: 11/25/2022]
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The rate of recurrent BRCA1, BRCA2, and TP53 mutations in the general population, and unselected ovarian cancer cases, in Belo Horizonte, Brazil. Cancer Genet 2016; 209:283-4. [PMID: 27160020 DOI: 10.1016/j.cancergen.2016.04.057] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Abdel-Mohsen MA, Ahmed OA, El-Kerm YM. BRCA1 Gene Mutations and Influence of Chemotherapy on Autophagy and Apoptotic Mechanisms in Egyptian Breast Cancer Patients. Asian Pac J Cancer Prev 2016; 17:1285-92. [DOI: 10.7314/apjcp.2016.17.3.1285] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Schayek H, De Marco L, Starinsky-Elbaz S, Rossette M, Laitman Y, Bastos-Rodrigues L, da Silva Filho AL, Friedman E. The rate of recurrent BRCA1, BRCA2, and TP53 mutations in the general population, and unselected ovarian cancer cases, in Belo Horizonte, Brazil. Cancer Genet 2016; 209:50-2. [DOI: 10.1016/j.cancergen.2015.11.003] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2015] [Revised: 11/04/2015] [Accepted: 11/09/2015] [Indexed: 12/20/2022]
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