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Nkansah EO, Ahenkorah J, Adutwum-Ofosu K, Adjei RL, Adu-Aryee NA, Tagoe EA, Koney NKK, Aryee NA, Hottor BA, Blay RM, Clegg-Lamptey JN, Arko-Boham B. BRCA1 gene polymorphism and finger dermatoglyphic patterns in Ghanaian breast cancer patients: a quantitative cross-sectional approach. Pan Afr Med J 2022; 43:209. [PMID: 36942145 PMCID: PMC10024563 DOI: 10.11604/pamj.2022.43.209.33136] [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: 01/06/2022] [Accepted: 12/15/2022] [Indexed: 12/30/2022] Open
Abstract
Introduction breast cancer development is linked to mutant single nucleotide polymorphism of breast cancer type 1 (BRCA1) gene usually harboured within exon 11. It has also been linked to finger dermatoglyphics where certain patterns have been associated with breast cancer. This study suggests a possible relationship between finger dermatoglyphic patterns and single nucleotide polymorphism of BRCA1 gene. Methods in a quantitative cross-sectional approach, finger dermatoglyphic patterns were obtained using the ink method from 70 female breast cancer patients and 70 age-matched apparently healthy females. Approximately 5 ml of venous blood was obtained from each participant from which DNA was extracted from the white blood cells collected after centrifugation. DNA was amplified and sequenced and the data aligned with the wildtype template of BRCA1 gene. Fingerprint patterns were analyzed with Chi-square. Mean frequency of fingerprint patterns was analyzed with independent student's t-test. Differences in data set with p<0.05 were statistically significant. Results luminal B was the predominant breast cancer molecular subtype among the patients. The predominant fingerprint pattern among breast cancer participants was the loop. Six or more loops had higher frequency among breast cancer females. The predominant BRCA1 gene variant locations were c.34311, c.34320, and c.34321 with c.34311A>C being the predominant variant. Higher percentage frequency of six or more loops in relation to c.34311A>C was observed in apparently healthy females compared to breast cancer females. Conclusion the study reports for the very first time in Ghana, BRCA1 gene variants and finger dermatoglyphics among breast cancer patients. Although the results are preliminary and inconclusive it creates an avenue for extended studies.
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Affiliation(s)
- Emmanuel Osei Nkansah
- Department of Anatomy, University of Ghana Medical School, University of Ghana, Accra, Ghana
| | - John Ahenkorah
- Department of Anatomy, University of Ghana Medical School, University of Ghana, Accra, Ghana
| | - Kevin Adutwum-Ofosu
- Department of Anatomy, University of Ghana Medical School, University of Ghana, Accra, Ghana
| | - Raymond Lovelace Adjei
- West African Center for Cell Biology of Infectious Pathogens, University of Ghana, Legon, Accra, Ghana
| | - Nii Armah Adu-Aryee
- Department of Surgery, University of Ghana Medical School, University of Ghana, Accra, Ghana
- Department of Surgery, Korle-Bu Teaching Hospital, Accra, Ghana
| | - Emmanuel Ayitey Tagoe
- Department of Medical Laboratory Sciences, School of Biomedical and Allied Health Sciences, University of Ghana, Accra, Ghana
| | - Nii Koney-Kwaku Koney
- Department of Anatomy, University of Ghana Medical School, University of Ghana, Accra, Ghana
| | - Nii Ayite Aryee
- Department of Medical Biochemistry, University of Ghana Medical School, University of Ghana, Accra, Ghana
| | - Bismark Afedo Hottor
- Department of Anatomy, University of Ghana Medical School, University of Ghana, Accra, Ghana
| | - Richard Michael Blay
- Department of Anatomy, University of Ghana Medical School, University of Ghana, Accra, Ghana
| | - Joe-Nat Clegg-Lamptey
- Department of Surgery, University of Ghana Medical School, University of Ghana, Accra, Ghana
- Department of Surgery, Korle-Bu Teaching Hospital, Accra, Ghana
| | - Benjamin Arko-Boham
- Department of Anatomy, University of Ghana Medical School, University of Ghana, Accra, Ghana
- Corresponding author: Benjamin Arko-Boham, Department of Anatomy, University of Ghana Medical School, University of Ghana, Accra, Ghana.
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Combrink HM, Oosthuizen J, Visser B, Chabilal N, Buccimazza I, Foulkes WD, van der Merwe NC. Mutations in BRCA-related breast and ovarian cancer in the South African Indian population: A descriptive study. Cancer Genet 2021; 258-259:1-6. [PMID: 34218100 DOI: 10.1016/j.cancergen.2021.06.002] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2019] [Revised: 02/07/2021] [Accepted: 06/06/2021] [Indexed: 10/21/2022]
Abstract
Knowledge of the genetic landscape of a specific population group is vital for population-specific diagnosis and treatment of familial breast cancer. Although BRCA-related diagnostic testing has long been implemented in South Africa, the genotyping approach previously failed for the SA Indian population as it was based on other SA population groups. Because this population is uniquely admixed, the lack of population-specific data resulted in the implementation of comprehensive mutation screens for BRCA1/2. A total of 223 female patients were screened for clinically actionable variants. High-resolution melting analysis (HRMA) was used to screen 88 patients for DNA alterations in the coding and splice site boundaries of BRCA1 exons 2-9, BRCA1 exons 11-23, BRCA2 exons 2-9 and BRCA2 exons 12-27. The protein truncation test (PTT) was used to screen the three larger exons (BRCA1 exon 10 and BRCA2 exons 10 and 11) for protein termination changes. Multiplex ligation-dependent probe amplification (MLPA) was used to determine the presence of larger indels and possible copy number differences. Next Generation Sequencing (NGS) was performed on the remaining 135 samples. All potential variants were confirmed by performing Sanger DNA sequencing. The search revealed 28 different pathogenic heterozygotic variants, together with nine variants of unknown significance (VUS). The results suggested that the SA Indian population represents a different genetic admixture compared to that of mainland India, as only five pathogenic variants corresponded to those reported for mainland India. Familial breast cancer testing for SA Indian patients should therefore be performed as comprehensively as possible as the pathogenic variants seem to be family- rather than population-specific. Furthermore, predictive testing of family members will contribute to relieve the financial burden on the country's healthcare system, as increased surveillance and appropriate management could prevent disease.
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Affiliation(s)
- Herkulaas Mve Combrink
- Division of Human Genetics, Faculty of Health Sciences, University of the Free State, Bloemfontein, South Africa; Division of Human Genetics, National Health Laboratory Services, Universitas Hospital, Bloemfontein, South Africa.
| | - Jaco Oosthuizen
- Division of Human Genetics, Faculty of Health Sciences, University of the Free State, Bloemfontein, South Africa; Division of Human Genetics, National Health Laboratory Services, Universitas Hospital, Bloemfontein, South Africa
| | - Botma Visser
- Department of Plant Sciences, Faculty of Natural and Agricultural Sciences, University of the Free State, Bloemfontein, South Africa
| | - Namitha Chabilal
- Genetics Unit, Inkosi Albert Luthuli General Hospital, Durban, South Africa
| | - Ines Buccimazza
- Department of Surgery, Faculty of Medicine, Inkosi Albert Luthuli General Hospital, Durban, South Africa
| | - William D Foulkes
- Lady Davis Institute and Segal Cancer Centre, Jewish General Hospital, Montréal, QC, Canada; Research Institute of the McGill University Health Centre, Montréal, QC, Canada; Program in Cancer Genetics, Departments of Oncology and Human Genetics, McGill University, Montréal, QC, Canada
| | - Nerina C van der Merwe
- Division of Human Genetics, Faculty of Health Sciences, University of the Free State, Bloemfontein, South Africa; Division of Human Genetics, National Health Laboratory Services, Universitas Hospital, Bloemfontein, South Africa
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AlHarthi FS, Qari A, Edress A, Abedalthagafi M. Familial/inherited cancer syndrome: a focus on the highly consanguineous Arab population. NPJ Genom Med 2020; 5:3. [PMID: 32025336 PMCID: PMC6997177 DOI: 10.1038/s41525-019-0110-y] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2019] [Accepted: 12/11/2019] [Indexed: 12/18/2022] Open
Abstract
The study of hereditary cancer, which accounts for ~10% of cancer cases worldwide is an important subfield of oncology. Our understanding of hereditary cancers has greatly advanced with recent advances in sequencing technology, but as with any genetic trait, gene frequencies of cancer-associated mutations vary across populations, and most studies that have located hereditary cancer genes have been conducted on European or Asian populations. There is an urgent need to trace hereditary cancer genes across the Arab world. Hereditary disease is particularly prevalent among members of consanguineous populations, and consanguineous marriages are particularly common in the Arab world. There are also cultural and educational idiosyncrasies that differentiate Arab populations from other more thoroughly studied groups with respect to cancer awareness and treatment. Therefore, a review of the literature on hereditary cancers in this understudied population was undertaken. We report that BRCA mutations are not as prevalent among Arab breast cancer patients as they are among other ethnic groups, and therefore, other genes may play a more important role. A wide variety of germline inherited mutations that are associated with cancer are discussed, with particular attention to breast, ovarian, colorectal, prostate, and brain cancers. Finally, we describe the state of the profession of familial cancer genetic counselling in the Arab world, and the clinics and societies dedicated to its advances. We describe the complexities of genetic counselling that are specific to the Arab world. Understanding hereditary cancer is heavily dependent on understanding population-specific variations in cancer-associated gene frequencies.
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Affiliation(s)
- Fawz S AlHarthi
- 1Genomics Research Department, Saudi Human Genome Project, King Fahad Medical City and King Abdulaziz City for Science and Technology, Riyadh, Saudi Arabia.,2Genetics Counselling Division, Saudi Diagnostic Laboratory, King Faisal Specialist Hospital International Company, Riyadh, Saudi Arabia
| | - Alya Qari
- 3Medical Genetic Department, King Faisal Specialist Hospital and Research Centre, Riyadh, Saudi Arabia
| | - Alaa Edress
- 1Genomics Research Department, Saudi Human Genome Project, King Fahad Medical City and King Abdulaziz City for Science and Technology, Riyadh, Saudi Arabia.,2Genetics Counselling Division, Saudi Diagnostic Laboratory, King Faisal Specialist Hospital International Company, Riyadh, Saudi Arabia
| | - Malak Abedalthagafi
- 1Genomics Research Department, Saudi Human Genome Project, King Fahad Medical City and King Abdulaziz City for Science and Technology, Riyadh, Saudi Arabia
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Smolarz B, Michalska MM, Samulak D, Romanowicz H, Wójcik L. Polymorphism of DNA Repair Genes via Homologous Recombination (HR) in Ovarian Cancer. Pathol Oncol Res 2019; 25:1607-1614. [PMID: 30712190 PMCID: PMC6815278 DOI: 10.1007/s12253-019-00604-5] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/23/2018] [Accepted: 01/15/2019] [Indexed: 11/26/2022]
Abstract
Ovarian cancer is one of the most common types of cancer in women. The repair system via homologous recombination repairs double-strand breaks (DSB) of DNA, which are the most mortal for cell, out of all DNA damages. The genes, which encode the double-strand break repairing proteins, are highly polymorphic and, taking into account the significance of the repaired defects for cancer development, it seems important to learn the role of the polymorphisms in ovarian cancer development. The aim of the study was to determine the relationship between DNA repair genes via homologous recombination (HR) and modulation of the risk of ovarian cancer. The following polymorphisms were analysed: XRCC3-Thr241Met (rs861539), XRCC2--41657C/T (rs718282), XRCC2-Arg188His (rs3218536), BRCA1-Q356R (rs1799950) and RAD51-135 G/C (rs1801320). The study group included 600 patients with ovarian cancer and 600 healthy controls. The PCR-RFLP (PCR-based restriction fragment length polymorphism) technique was applied for polymorphism analysis. Allele XRCC3-241Met (OR 0.85, 95%CI 0.72-0.99, p < 0.045), XRCC2-41657 T (OR 1.67, 95% CI 1.42-1.96, p < .0001), BRCA1-356R (OR 1.61; % CI 1.37-1.90, p < .0001) and RAD51-135C (OR 5.16; 95% CI 4.29-6.20, p < .0001) strongly correlated with the neoplastic disease. No relationship was observed between the studied polymorphisms and the cancer progression stage according to FIGO classification. The results indicate that polymorphisms of DNA repair genes via homologous recombination may be associated with the incidence of ovarian cancer. Further research on larger groups is warranted to determine the influence of above-mentioned genetic variants on ovarian cancer risk.
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Affiliation(s)
- Beata Smolarz
- Laboratory of Cancer Genetics, Department of Pathology, Institute of Polish Mother’s Memorial Hospital, Rzgowska 281/289, 93-338 Lodz, Poland
| | - Magdalena M. Michalska
- Department of Obstetrics and Gynaecology, Regional Hospital in Kalisz, Kalisz, Poland
- The State Higher Professional School of Stanisław Wojciechowski, Kalisz, Poland
| | - Dariusz Samulak
- Department of Obstetrics and Gynaecology, Regional Hospital in Kalisz, Kalisz, Poland
- The State Higher Professional School of Stanisław Wojciechowski, Kalisz, Poland
| | - Hanna Romanowicz
- Laboratory of Cancer Genetics, Department of Pathology, Institute of Polish Mother’s Memorial Hospital, Rzgowska 281/289, 93-338 Lodz, Poland
| | - Luiza Wójcik
- Laboratory of Cancer Genetics, Department of Pathology, Institute of Polish Mother’s Memorial Hospital, Rzgowska 281/289, 93-338 Lodz, Poland
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Fung SM, Wong XY, Lee SX, Miao H, Hartman M, Wee HL. Performance of Single-Nucleotide Polymorphisms in Breast Cancer Risk Prediction Models: A Systematic Review and Meta-analysis. Cancer Epidemiol Biomarkers Prev 2018; 28:506-521. [DOI: 10.1158/1055-9965.epi-18-0810] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2018] [Revised: 10/30/2018] [Accepted: 12/03/2018] [Indexed: 11/16/2022] Open
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6
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Xu GP, Zhao Q, Wang D, Xie WY, Zhang LJ, Zhou H, Chen SZ, Wu LF. The association between BRCA1 gene polymorphism and cancer risk: a meta-analysis. Oncotarget 2018; 9:8681-8694. [PMID: 29492227 PMCID: PMC5823592 DOI: 10.18632/oncotarget.24064] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2017] [Accepted: 11/17/2017] [Indexed: 12/20/2022] Open
Abstract
Many studies have reported that BRCA1 polymorphisms are associated with cancer risk, but the results remain controversial. The purpose of this meta-analysis is to evaluate the relationship between BRCA1 polymorphisms (rs799917, rs1799950, rs1799966, or rs16941) and cancer risk. Relevant studies were identified via a systematic search of the PubMed, Embase, and Web of Science databases up to July 31, 2017. Odds ratios (ORs) with 95% confidence intervals (CIs) were calculated to examine the strength of the associations. Thirty-five studies published in 19 publications involving 28,094 cases and 50,657 controls were included in this meta-analysis. There was no obvious association between rs799917, rs1799966, or rs16941 polymorphisms and overall cancer risk in any genetic models. However, subgroup analyses revealed that the rs799917 polymorphism could decrease the risk of cervical cancer, esophageal squamous cell carcinoma (ESCC), gastric cancer, and non-Hodgkin lymphoma (NHL) among Asian populations in one or more genetic models and that rs16941 could increase overall cancer risk among Caucasian populations in the homozygote and recessive models. Our meta-analysis also indicated that rs1799950 could decrease the breast cancer (BC) risk among Caucasian populations in the homozygote and recessive models. In summary, our results suggest that BRCA1 polymorphisms may play an important role in the etiology of cancer. However, due to the limited number of studies, these findings should be confirmed by new studies with larger sample sizes that address various types of cancer.
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Affiliation(s)
- Gui-Ping Xu
- Transfusion Department, The Second Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Qing Zhao
- Department of Laboratory Medicine, The Second Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Ding Wang
- Department of Laboratory Medicine, The Second Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Wen-Yue Xie
- Department of Oncology, The Second Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Li-Jun Zhang
- Department of Laboratory Medicine, The Second Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Hua Zhou
- Department of Laboratory Medicine, The Second Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Shi-Zhi Chen
- Department of Laboratory Medicine, The Second Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Li-Fang Wu
- Department of Laboratory Medicine, The Second Affiliated Hospital of Chongqing Medical University, Chongqing, China
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7
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Gray JM, Rasanayagam S, Engel C, Rizzo J. State of the evidence 2017: an update on the connection between breast cancer and the environment. Environ Health 2017; 16:94. [PMID: 28865460 PMCID: PMC5581466 DOI: 10.1186/s12940-017-0287-4] [Citation(s) in RCA: 109] [Impact Index Per Article: 15.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2016] [Accepted: 07/17/2017] [Indexed: 05/23/2023]
Abstract
BACKGROUND In this review, we examine the continually expanding and increasingly compelling data linking radiation and various chemicals in our environment to the current high incidence of breast cancer. Singly and in combination, these toxicants may have contributed significantly to the increasing rates of breast cancer observed over the past several decades. Exposures early in development from gestation through adolescence and early adulthood are particularly of concern as they re-shape the program of genetic, epigenetic and physiological processes in the developing mammary system, leading to an increased risk for developing breast cancer. In the 8 years since we last published a comprehensive review of the relevant literature, hundreds of new papers have appeared supporting this link, and in this update, the evidence on this topic is more extensive and of better quality than that previously available. CONCLUSION Increasing evidence from epidemiological studies, as well as a better understanding of mechanisms linking toxicants with development of breast cancer, all reinforce the conclusion that exposures to these substances - many of which are found in common, everyday products and byproducts - may lead to increased risk of developing breast cancer. Moving forward, attention to methodological limitations, especially in relevant epidemiological and animal models, will need to be addressed to allow clearer and more direct connections to be evaluated.
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Affiliation(s)
- Janet M. Gray
- Department of Psychology and Program in Science, Technology, and Society, Vassar College, 124 Raymond Avenue, Poughkeepsie, NY 12604-0246 USA
| | - Sharima Rasanayagam
- Breast Cancer Prevention Partners, 1388 Sutter St., Suite 400, San Francisco, CA 94109-5400 USA
| | - Connie Engel
- Breast Cancer Prevention Partners, 1388 Sutter St., Suite 400, San Francisco, CA 94109-5400 USA
| | - Jeanne Rizzo
- Breast Cancer Prevention Partners, 1388 Sutter St., Suite 400, San Francisco, CA 94109-5400 USA
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8
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van der Merwe N, Peeters AV, Pienaar FM, Bezuidenhout J, van Rensburg SJ, Kotze MJ. Exome Sequencing in a Family with Luminal-Type Breast Cancer Underpinned by Variation in the Methylation Pathway. Int J Mol Sci 2017; 18:E467. [PMID: 28241424 PMCID: PMC5343999 DOI: 10.3390/ijms18020467] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2017] [Revised: 01/31/2017] [Accepted: 02/10/2017] [Indexed: 01/19/2023] Open
Abstract
Panel-based next generation sequencing (NGS) is currently preferred over whole exome sequencing (WES) for diagnosis of familial breast cancer, due to interpretation challenges caused by variants of uncertain clinical significance (VUS). There is also no consensus on the selection criteria for WES. In this study, a pathology-supported genetic testing (PSGT) approach was used to select two BRCA1/2 mutation-negative breast cancer patients from the same family for WES. Homozygosity for the MTHFR 677 C>T mutation detected during this PSGT pre-screen step was considered insufficient to cause bilateral breast cancer in the index case and her daughter diagnosed with early-onset breast cancer (<30 years). Extended genetic testing using WES identified the RAD50 R385C missense mutation in both cases. This rare variant with a minor allele frequency (MAF) of <0.001 was classified as a VUS after exclusion in an affected cousin and extended genotyping in 164 unrelated breast cancer patients and 160 controls. Detection of functional polymorphisms (MAF > 5%) in the folate pathway in all three affected family members is consistent with inheritance of the luminal-type breast cancer in the family. PSGT assisted with the decision to pursue extended genetic testing and facilitated clinical interpretation of WES aimed at reduction of recurrence risk.
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Affiliation(s)
- Nicole van der Merwe
- Division of Anatomical Pathology, Department of Pathology, Faculty of Medicine and Health Sciences, Stellenbosch University, Tygerberg 7500, South Africa.
| | - Armand V Peeters
- Division of Anatomical Pathology, Department of Pathology, Faculty of Medicine and Health Sciences, Stellenbosch University, Tygerberg 7500, South Africa.
| | | | - Juanita Bezuidenhout
- Division of Anatomical Pathology, Department of Pathology, Faculty of Medicine and Health Sciences, Stellenbosch University, Tygerberg 7500, South Africa.
| | - Susan J van Rensburg
- Division of Chemical Pathology, Department of Pathology, Faculty of Medicine and Health Sciences, Stellenbosch University, Tygerberg 7500, South Africa.
| | - Maritha J Kotze
- Division of Chemical Pathology, Department of Pathology, Faculty of Medicine and Health Sciences, Stellenbosch University, Tygerberg 7500, South Africa.
- National Health Laboratory Service, Tygerberg Hospital, Tygerberg 7500, South Africa.
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Sanchez A, Schoenfeld JD, Nguyen PL, Fiorentino M, Chowdhury D, Stampfer MJ, Sesso HD, Giovannucci E, Mucci LA, Shui IM. Common variation in BRCA1 may have a role in progression to lethal prostate cancer after radiation treatment. Prostate Cancer Prostatic Dis 2016; 19:197-201. [PMID: 26926928 PMCID: PMC4865401 DOI: 10.1038/pcan.2016.4] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2015] [Revised: 12/30/2016] [Accepted: 01/26/2016] [Indexed: 12/19/2022]
Abstract
BACKGROUND To evaluate whether single-nucleotide polymorphisms (SNPs) reflecting common variation in the tumor suppressor BRCA1 affect prostate cancer outcomes. Because radiation therapy (RT) induces DNA damage, we hypothesized that common variation in BRCA1 has a role in progression to lethal prostate cancer, particularly in patients receiving RT. METHODS We followed 802 men diagnosed with localized prostate cancer (cT1-T3/N0/M0) who were treated with RT in the US Health Professionals Follow-up Study (HPFS) and Physicians' Health Study (PHS), for progression to lethal prostate cancer. Six SNPs (rs3737559, rs1799950, rs799923, rs915945, rs4474733 and rs8176305) were genotyped in HPFS to capture common variation across BRCA1. rs4474733 and rs8176305 were also evaluated in the PHS cohort. Cox proportional hazards models were used to estimate per-allele hazard ratios (HR) and 95% confidence intervals (CI) stratified by primary treatment. RESULTS In the RT group (n=802), 71 men progressed to lethal disease during a mean follow-up of 12 years. We found that two SNPs, rs4473733 (HR: 0.65; 95% CI 0.42-0.99) and rs8176305 (HR: 2.03; 95% CI 1.33-3.10), were associated with lethal prostate cancer in men receiving RT. CONCLUSIONS Common variation in BRCA1 may influence clinical outcomes in patients receiving RT for localized prostate cancer by modifying the response to RT. Our findings merit further follow-up studies to validate these SNPs and better understand their functional and biological significance.
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Affiliation(s)
| | | | - Paul L Nguyen
- Department of Radiation Oncology, Dana-Farber Cancer Institute, Boston, MA
| | | | - Dipanjan Chowdhury
- Department of Radiation Oncology, Dana-Farber Cancer Institute, Boston, MA
| | - Meir J Stampfer
- Department of Epidemiology, Harvard School of Public Health, Boston, MA
- Channing Division of Network Medicine, Brigham and Women's Hospital, and Harvard Medical School, Boston, MA
- Division of Preventive Medicine, Department of Medicine, Brigham and Women's Hospital, and Harvard Medical School, Boston, MA
| | - Howard D Sesso
- Department of Epidemiology, Harvard School of Public Health, Boston, MA
- Division of Preventive Medicine, Department of Medicine, Brigham and Women's Hospital, and Harvard Medical School, Boston, MA
| | - Edward Giovannucci
- Department of Epidemiology, Harvard School of Public Health, Boston, MA
- Channing Division of Network Medicine, Brigham and Women's Hospital, and Harvard Medical School, Boston, MA
| | - Lorelei A Mucci
- Department of Epidemiology, Harvard School of Public Health, Boston, MA
- Channing Division of Network Medicine, Brigham and Women's Hospital, and Harvard Medical School, Boston, MA
| | - Irene M Shui
- Department of Epidemiology, Harvard School of Public Health, Boston, MA
- Fred Hutchinson Cancer Research Center, Seattle WA
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