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Guo F, Adekanmbi V, Hsu CD, Berenson AB, Kuo YF, Shih YCT. Cost-Effectiveness of Population-Based Multigene Testing for Breast and Ovarian Cancer Prevention. JAMA Netw Open 2024; 7:e2356078. [PMID: 38353949 PMCID: PMC10867683 DOI: 10.1001/jamanetworkopen.2023.56078] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/16/2023] [Accepted: 12/21/2023] [Indexed: 02/16/2024] Open
Abstract
Importance The current method of BRCA testing for breast and ovarian cancer prevention, which is based on family history, often fails to identify many carriers of pathogenic variants. Population-based genetic testing offers a transformative approach in cancer prevention by allowing for proactive identification of any high-risk individuals and enabling early interventions. Objective To assess the lifetime incremental effectiveness, costs, and cost-effectiveness of population-based multigene testing vs family history-based testing. Design, Setting, and Participants This economic evaluation used a microsimulation model to assess the cost-effectiveness of multigene testing (BRCA1, BRCA2, and PALB2) for all women aged 30 to 35 years compared with the current standard of care that is family history based. Carriers of pathogenic variants were offered interventions, such as magnetic resonance imaging with or without mammography, chemoprevention, or risk-reducing mastectomy and salpingo-oophorectomy, to reduce cancer risk. A total of 2000 simulations were run on 1 000 000 women, using a lifetime time horizon and payer perspective, and costs were adjusted to 2022 US dollars. This study was conducted from September 1, 2020, to December 15, 2023. Main Outcomes and Measures The main outcome measure was the incremental cost-effectiveness ratio (ICER), quantified as cost per quality-adjusted life-year (QALY) gained. Secondary outcomes included incremental cost, additional breast and ovarian cancer cases prevented, and excess deaths due to coronary heart disease (CHD). Results The study assessed 1 000 000 simulated women aged 30 to 35 years in the US. In the base case, population-based multigene testing was more cost-effective compared with family history-based testing, with an ICER of $55 548 per QALY (95% CI, $47 288-$65 850 per QALY). Population-based multigene testing would be able to prevent an additional 1338 cases of breast cancer and 663 cases of ovarian cancer, but it would also result in 69 cases of excess CHD and 10 excess CHD deaths per million women. The probabilistic sensitivity analyses show that the probability that population-based multigene testing is cost-effective was 100%. When the cost of the multigene test exceeded $825, population-based testing was no longer cost-effective (ICER, $100 005 per QALY; 95% CI, $87 601-$11 6323). Conclusions and Relevance In this economic analysis of population-based multigene testing, population-based testing was a more cost-effective strategy for the prevention of breast cancer and ovarian cancer when compared with the current family history-based testing strategy at the $100 000 per QALY willingness-to-pay threshold. These findings support the need for more comprehensive genetic testing strategies to identify pathogenic variant carriers and enable informed decision-making for personalized risk management.
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Affiliation(s)
- Fangjian Guo
- Department of Obstetrics and Gynecology, The University of Texas Medical Branch at Galveston, Galveston
- Center for Interdisciplinary Research in Women’s Health, The University of Texas Medical Branch at Galveston, Galveston
| | - Victor Adekanmbi
- Department of Obstetrics and Gynecology, The University of Texas Medical Branch at Galveston, Galveston
- Center for Interdisciplinary Research in Women’s Health, The University of Texas Medical Branch at Galveston, Galveston
| | - Christine D. Hsu
- Department of Obstetrics and Gynecology, The University of Texas Medical Branch at Galveston, Galveston
- Center for Interdisciplinary Research in Women’s Health, The University of Texas Medical Branch at Galveston, Galveston
| | - Abbey B. Berenson
- Department of Obstetrics and Gynecology, The University of Texas Medical Branch at Galveston, Galveston
- Center for Interdisciplinary Research in Women’s Health, The University of Texas Medical Branch at Galveston, Galveston
| | - Yong-Fang Kuo
- Center for Interdisciplinary Research in Women’s Health, The University of Texas Medical Branch at Galveston, Galveston
- Department of Biostatistics and Data Science, The University of Texas Medical Branch at Galveston, Galveston
- Office of Biostatistics, University of Texas Medical Branch at Galveston, Galveston
| | - Ya-Chen Tina Shih
- Program in Cancer Health Economics Research, Jonsson Comprehensive Cancer Center, and Department of Radiation Oncology, School of Medicine, University of California, Los Angeles
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Tonouo PD, Dina Bell E, Tiofack Zebaze AA, Ndounga E, Noa Ananga S, Atenguena E, Simo G, Njouendou AJ, Lueong SS. Molecular characterization of early breast cancer onset to understand disease phenotypes in African patients. Med Oncol 2022; 40:13. [PMID: 36352274 DOI: 10.1007/s12032-022-01877-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2022] [Accepted: 10/18/2022] [Indexed: 11/11/2022]
Abstract
Female breast cancer (BC) is the leading cause of cancer-related deaths worldwide with higher mortality rates and early onset in developing countries. The molecular basis of early disease onset is still elusive. We recruited 472 female breast cancer from two sub-Saharan African countries (Cameroon and Congo) between 2007 and 2018 and collected clinical data from these patients. To investigate the molecular drivers of early disease onset, we analyzed publicly available breast cancer molecular data from the cancer genome atlas (TCGA) and the gene expression omnibus (GEO) for copy number alteration, mutation and gene expression. Early BC onset (EOBRCA) (diagnosis before 45 years) was higher in African women compared with the TCGA cohort (51.7% vs 15.6%). The tumor grade, mitotic index, HER2 + phenotype, basal-like phenotype and ki67 were higher in EOBRCA for all cohorts. BC risk factors such as parity, breastfeeding early onset of menarche and use of hormonal contraceptives were significantly associated with EOBRCA (p < 0.05). EOBRCA was equally associated with copy number alterations in several oncogenes including CDH6 and FOXM1 and tumor suppressor including TGM3 and DMBT1 as well as higher TP53 mutation rates (OR: 2.93, p < 0.01). There was a significant enrichment of TGFß signaling in EOBRCA with TGM3 deletions, which was associated with high expression of all SMAD transcription factors as well as WNT ligands. The Frizzled receptors FZD1, FZD4 and FZD6 were significantly upregulated in EOBRCA, suggesting activation of non-canonical WNT signaling. Our data, suggest the implication of TGM3 deletion in early breast cancer onset. Further molecular investigations are warranted in African patients.
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Guo F, Scholl M, Fuchs EL, Berenson AB, Kuo YF. BRCA testing and testing results among women 18–65 years old. Prev Med Rep 2022; 26:101738. [PMID: 35242503 PMCID: PMC8866899 DOI: 10.1016/j.pmedr.2022.101738] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2021] [Revised: 01/22/2022] [Accepted: 02/16/2022] [Indexed: 11/01/2022] Open
Abstract
BRCA testing rate increased from 2007 to 2017. Documented positive test rate was decreasing 2007 to 2017. The trend in documented positive test rate differed across races/ethnicities. It suggests of a divergent application of the same testing criteria.
Since the 1990 s discovery of BRCA1 and BRCA2 pathogenic variants in breast or ovarian cancer patients, genetic testing has been recommended as part of a targeted, individualized approach for cancer prevention and treatment in eligible individuals. The aim of this study was to assess trends in BRCA test rates and results among adult women aged 18 to 65 in the US between 2007 and 2017. Using Clinformatics© Data Mart (CDM) Electronic Health Records, we included 223,211 women 18–65 years old with documented BRCA testing results from 1/1/2007–9/30/2017. Positive results indicated the presence of pathogenic variantss. BRCA test rates increased significantly from 34 per 100,000 women in 2007 to 488 per 100,000 women in 2016 (APC 30.8, 95% confidence interval 26.6–35.1). Documented positive results decreased from 86.1% in 2007 to 78.0% in 2017(APC −0.6, 95% confidence interval −1.4–0.2). From 2007 to 2017, decreasing trends in the rates of documented positive results were observed among all three age groups (18–39, 40–54, and 55–65 years; largest in 40–54 group). In 2015–2017, women with positive test results were less likely to be non–Hispanic Whites, cancer patients, or living in the Northeast or an area with average household income ≥$50,000. Between 2007 and 2017, increasing use of BRCA testing for cancer prevention and treatment occurred, correlating to the observed decreasing documented positive test rate. The utilization of testing and corresponding test results differed significantly across races/ethnicities, suggestive of a divergent application of the same testing criteria.
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Guo F, Hirth JM, Fuchs EL, Cofie LE, Brown V, Kuo YF, Fernandez ME, Berenson AB. Knowledge, Attitudes, Willingness to Pay, and Patient Preferences About Genetic Testing and Subsequent Risk Management for Cancer Prevention. J Cancer Educ 2022; 37:362-369. [PMID: 32642924 PMCID: PMC7794087 DOI: 10.1007/s13187-020-01823-0] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/11/2023]
Abstract
Knowledge, attitudes, and patient preferences about genetic testing and subsequent risk management for cancer prevention among average risk populations are understudied, especially among Hispanics. This study was to assess these items by conducting an in-person survey in this understudied population. We conducted in-person surveys using a self-administered, structured questionnaire among young women in 2017. Survey questions were adapted from other validated surveys. This study had 677 participants in the final analyses. Data were collected in 2017 and analyzed in 2018 and 2019. Participants had little knowledge about genes or breast cancer risk, but most felt that genetic testing for cancer prevention is "a good idea" (87.0%), "a reassuring idea" (84.0%), and that "everyone should get the test" (87.7%). Most (64.0%) of these women would pay up to $25 for the test, 29.3% would pay $25-$500, and < 10% would pay more than $500 for the test. When asked about a hypothetical scenario of high breast cancer risk, 34.2% Hispanics and 24.5% non-Hispanics would choose chemoprevention. Women would be less likely to choose risk reduction procedures, such as mastectomy (19.6% among Hispanics and 15.1% among non-Hispanics) and salpingo-oophorectomy (11.8% among Hispanics and 10.7% among non-Hispanics). In this low-income, mostly Hispanic population, knowledge about genetic testing and cancer risk is poor, but most have positive opinions about genetic testing for cancer prevention. However, their strong preference for chemoprevention and lesser preference for prophylactic surgeries in a hypothetical scenario underscore the importance of genetic counseling and education.
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Affiliation(s)
- Fangjian Guo
- Department of Obstetrics & Gynecology, The University of Texas Medical Branch at Galveston, 301 University Blvd., Galveston, TX, 77555-0587, USA.
- Center for Interdisciplinary Research in Women's Health, The University of Texas Medical Branch at Galveston, 301 University Blvd., Galveston, TX, 77555-0587, USA.
| | - Jacqueline M Hirth
- Department of Obstetrics & Gynecology, The University of Texas Medical Branch at Galveston, 301 University Blvd., Galveston, TX, 77555-0587, USA
- Center for Interdisciplinary Research in Women's Health, The University of Texas Medical Branch at Galveston, 301 University Blvd., Galveston, TX, 77555-0587, USA
| | - Erika L Fuchs
- Department of Obstetrics & Gynecology, The University of Texas Medical Branch at Galveston, 301 University Blvd., Galveston, TX, 77555-0587, USA
- Center for Interdisciplinary Research in Women's Health, The University of Texas Medical Branch at Galveston, 301 University Blvd., Galveston, TX, 77555-0587, USA
| | - Leslie E Cofie
- Department of Health Education and Promotion, East Carolina University, Greenville, NC, USA
| | - Veronica Brown
- Department of Obstetrics & Gynecology, The University of Texas Medical Branch at Galveston, 301 University Blvd., Galveston, TX, 77555-0587, USA
- Center for Interdisciplinary Research in Women's Health, The University of Texas Medical Branch at Galveston, 301 University Blvd., Galveston, TX, 77555-0587, USA
| | - Yong-Fang Kuo
- Center for Interdisciplinary Research in Women's Health, The University of Texas Medical Branch at Galveston, 301 University Blvd., Galveston, TX, 77555-0587, USA
- Office of Biostatistics, Department of Preventive Medicine and Community Health, The University of Texas Medical Branch, Galveston, TX, USA
- Institute for Translational Science, The University of Texas Medical Branch, Galveston, TX, USA
| | - Maria E Fernandez
- Center for Health Promotion and Prevention Research, School of Public Health, University of Texas Health Science Center at Houston, Houston, TX, USA
| | - Abbey B Berenson
- Department of Obstetrics & Gynecology, The University of Texas Medical Branch at Galveston, 301 University Blvd., Galveston, TX, 77555-0587, USA
- Center for Interdisciplinary Research in Women's Health, The University of Texas Medical Branch at Galveston, 301 University Blvd., Galveston, TX, 77555-0587, USA
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Shah SM, Demidova EV, Lesh RW, Hall MJ, Daly MB, Meyer JE, Edelman MJ, Arora S. Therapeutic implications of germline vulnerabilities in DNA repair for precision oncology. Cancer Treat Rev 2022; 104:102337. [PMID: 35051883 PMCID: PMC9016579 DOI: 10.1016/j.ctrv.2021.102337] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2021] [Revised: 12/30/2021] [Accepted: 12/31/2021] [Indexed: 12/12/2022]
Abstract
DNA repair vulnerabilities are present in a significant proportion of cancers. Specifically, germline alterations in DNA repair not only increase cancer risk but are associated with treatment response and clinical outcomes. The therapeutic landscape of cancer has rapidly evolved with the FDA approval of therapies that specifically target DNA repair vulnerabilities. The clinical success of synthetic lethality between BRCA deficiency and poly(ADP-ribose) polymerase (PARP) inhibition has been truly revolutionary. Defective mismatch repair has been validated as a predictor of response to immune checkpoint blockade associated with durable responses and long-term benefit in many cancer patients. Advances in next generation sequencing technologies and their decreasing cost have supported increased genetic profiling of tumors coupled with germline testing of cancer risk genes in patients. The clinical adoption of panel testing for germline assessment in high-risk individuals has generated a plethora of genetic data, particularly on DNA repair genes. Here, we highlight the therapeutic relevance of germline aberrations in DNA repair to identify patients eligible for precision treatments such as PARP inhibitors (PARPis), immune checkpoint blockade, chemotherapy, radiation therapy and combined treatment. We also discuss emerging mechanisms that regulate DNA repair.
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Affiliation(s)
- Shreya M. Shah
- Cancer Prevention and Control Program, Fox Chase Cancer Center, Philadelphia, PA, United States,Science Scholars Program, Temple University, Philadelphia, PA, United States
| | - Elena V. Demidova
- Cancer Prevention and Control Program, Fox Chase Cancer Center, Philadelphia, PA, United States,Kazan Federal University, Kazan, Russian Federation
| | - Randy W. Lesh
- Cancer Prevention and Control Program, Fox Chase Cancer Center, Philadelphia, PA, United States,Geisinger Commonwealth School of Medicine, Scranton, PA, United States
| | - Michael J. Hall
- Cancer Prevention and Control Program, Fox Chase Cancer Center, Philadelphia, PA, United States,Department of Clinical Genetics, Fox Chase Cancer Center, Philadelphia, PA, United States
| | - Mary B. Daly
- Cancer Prevention and Control Program, Fox Chase Cancer Center, Philadelphia, PA, United States,Department of Clinical Genetics, Fox Chase Cancer Center, Philadelphia, PA, United States
| | - Joshua E. Meyer
- Department of Radiation Oncology, Fox Chase Cancer Center, Philadelphia, PA, United States,Molecular Therapeutics Program, Fox Chase Cancer Center, Philadelphia, PA, United States
| | - Martin J. Edelman
- Department of Hematology/Oncology, Fox Chase Cancer Center, Philadelphia, PA, United States,Correspondence: Sanjeevani Arora, PhD, Cancer Prevention and Control Program, Fox Chase Cancer Center, 333 Cottman Avenue, Philadelphia, PA 19111-2497, OR Martin J Edelman, MD, Department of Hematology/Oncology, Fox Chase Cancer Center, 333 Cottman Avenue, Philadelphia, PA 19111-2497,
| | - Sanjeevani Arora
- Cancer Prevention and Control Program, Fox Chase Cancer Center, Philadelphia, PA, United States; Department of Radiation Oncology, Fox Chase Cancer Center, Philadelphia, PA, United States.
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Abstract
IMPORTANCE Genetic testing for BRCA1/2 pathogenic variants has been used for targeted, individualized cancer prevention and treatment. A positive BRCA test result indicates a higher risk for developing BRCA-related cancers. During the past decade, testing criteria have loosened. The impact of these loosened criteria on BRCA testing in older women has not previously been studied. OBJECTIVE To assess whether the rate of positive BRCA test results changed between 2008 and 2018 among older women in the United States. DESIGN, SETTING, AND PARTICIPANTS This cross-sectional study used a 10% random sample of women 65 years of age or older from Optum's deidentified Integrated Claims-Clinical data set (2008-2018), a large national electronic health record data set. A total of 5533 women with BRCA test results from January 1, 2008, to March 31, 2018, were evaluated. MAIN OUTCOMES AND MEASURES Annual percentage change in positive BRCA test results was evaluated. Multivariable logistic regression models were used to assess the association between positive test results and race/ethnicity, region of residence, income, educational level, and personal history of breast or ovarian cancer. RESULTS Of 5533 women 65 years of age or older (mean age, 68.1 years [95% CI, 67.9-68.4 years]) who underwent BRCA testing from 2008 to 2018, most (4679 [84.6%]) were non-Hispanic White women, and 1915 (34.6%) resided in the Midwest. Positive BRCA test results decreased from 85.7% (36 of 42) in 2008 to 55.6% (140 of 252) in 2018 (annual percentage change, -2.55; 95% CI, -3.45 to -1.64). Among patients with breast or ovarian cancer, positive test results decreased from 83.3% (20 of 24) in 2008 to 61.6% (61 of 99) in 2018, while among women without breast or ovarian cancer, positive test results decreased from 87.5% (21 of 24) in 2008 to 48.4% (74 of 153) in 2018 (annual percentage change, -3.17 vs -2.49; P = .29). Women with positive test results were more likely to be non-Hispanic Black women, to live in the West or South, to live in areas with a low percentage of college graduates, or to not have a personal history of breast or ovarian cancer. CONCLUSIONS AND RELEVANCE This study suggests that there was a significantly decreasing rate of positive BRCA test results among women 65 years of age or older. Socioeconomic and regional disparities in testing use remain an issue.
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Affiliation(s)
- Fangjian Guo
- Department of Obstetrics and Gynecology, The University of Texas Medical Branch at Galveston, Galveston
- Center for Interdisciplinary Research in Women’s Health, The University of Texas Medical Branch at Galveston, Galveston
| | - Matthew Scholl
- School of Medicine, The University of Texas Medical Branch at Galveston, Galveston
| | - Erika L. Fuchs
- Department of Obstetrics and Gynecology, The University of Texas Medical Branch at Galveston, Galveston
- Center for Interdisciplinary Research in Women’s Health, The University of Texas Medical Branch at Galveston, Galveston
| | - Rebeca Wong
- Center for Interdisciplinary Research in Women’s Health, The University of Texas Medical Branch at Galveston, Galveston
- Department of Preventive Medicine and Community Health, The University of Texas Medical Branch at Galveston, Galveston
| | - Yong-Fang Kuo
- Center for Interdisciplinary Research in Women’s Health, The University of Texas Medical Branch at Galveston, Galveston
- Department of Preventive Medicine and Community Health, The University of Texas Medical Branch at Galveston, Galveston
- Office of Biostatistics, Department of Preventive Medicine and Community Health, The University of Texas Medical Branch at Galveston, Galveston
- Institute for Translational Science, The University of Texas Medical Branch at Galveston, Galveston
| | - Abbey B. Berenson
- Department of Obstetrics and Gynecology, The University of Texas Medical Branch at Galveston, Galveston
- Center for Interdisciplinary Research in Women’s Health, The University of Texas Medical Branch at Galveston, Galveston
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Kim EK, Park SY, Kim SW. Clinicopathological characteristics of BRCA-associated breast cancer in Asian patients. J Pathol Transl Med 2020; 54:265-275. [PMID: 32397691 PMCID: PMC7385261 DOI: 10.4132/jptm.2020.04.07] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2020] [Accepted: 04/07/2020] [Indexed: 12/20/2022] Open
Abstract
BRCA1/2 germline mutations account for the majority of hereditary breast cancers. Since the identification of the BRCA genes, several attempts have been made to define the clinicopathological characteristics of BRCA-associated breast cancer in comparison with sporadic breast cancer. Asians constitute 60% of the world population, and although the incidence of breast cancer in Asia remains low compared to the West, breast cancer is the most prevalent female cancer in the region. The epidemiological aspects of breast cancer are different between Asians and Caucasians. Asian patients present with breast cancer at a younger age than Western patients. The contributions of BRCA1/2 mutations to breast cancer incidence are expected to differ between Asians and Caucasians, and the different genetic backgrounds among races are likely to influence the breast cancer phenotypes. However, most large-scale studies on the clinicopathological characteristics of BRCA-associated breast cancer have been on Western patients, while studies on Asian populations were small and sporadic. In this review, we provide an overview of the clinical and pathological characteristics of BRCA-associated breast cancer, incorporating findings on Asian patients.
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Affiliation(s)
- Eun-Kyu Kim
- Department of Surgery, Seoul National University Bundang Hospital, Seoul National University College of Medicine, Seongnam, Korea
| | - So Yeon Park
- Department of Pathology, Seoul National University Bundang Hospital, Seoul National University College of Medicine, Seongnam, Korea
| | - Sung-Won Kim
- Department of Surgery, Daerim St. Mary's Hospital, Seoul, Korea
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Guo F, Scholl M, Fuchs EL, Berenson AB, Kuo YF. BRCA testing in unaffected young women in the United States, 2006-2017. Cancer 2020; 126:337-343. [PMID: 31568561 PMCID: PMC6952576 DOI: 10.1002/cncr.32536] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2019] [Revised: 09/05/2019] [Accepted: 09/09/2019] [Indexed: 01/05/2023]
Abstract
BACKGROUND The discovery of the BRCA gene in the 1990s created an opportunity for individualized cancer prevention. BRCA testing in young women before cancer onset enables early detection of those with an increased cancer risk and creates an opportunity to offer lifesaving prophylactic procedures and medications. This study assessed trends in BRCA testing in women younger than 40 years without diagnosed breast or ovarian cancer (unaffected young women [UYW]) for cancer prevention between 2006 and 2017 in the United States. METHODS This study included 93,278 adult women 18 to 65 years old with insurance claims for BRCA testing between 2006 and 2017 from the de-identified Optum Clinformatics Data Mart database. The data contained medical claims and administrative information from privately insured individuals in the United States. The proportion of BRCA testing in UYW younger than 40 years among adult women aged 18 to 65 years who received BRCA testing was assessed. RESULTS In 2006, only 10.5% of the tests were performed in UYW. The proportion of BRCA tests performed in UYW increased significantly to 25.5% in 2017 (annual percentage change for the 2006-2017 period, 6.9; 95% confidence interval, 6.4-7.3; P < .001). The increased trend in the proportion of BRCA tests in UYW significantly differed by region of residence and family history of breast or ovarian cancer. CONCLUSIONS Over the past decade, there was increased use of BRCA testing for cancer prevention. Additional efforts are needed to maximize the early detection of women with BRCA pathogenic variants so that these cancers may be prevented.
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Affiliation(s)
- Fangjian Guo
- Department of Obstetrics & Gynecology
- Center for Interdisciplinary Research in Women’s
Health
| | - Matthew Scholl
- School of Medicine, University of Texas Medical Branch,
Galveston, TX
| | - Erika L. Fuchs
- Department of Obstetrics & Gynecology
- Center for Interdisciplinary Research in Women’s
Health
| | - Abbey B. Berenson
- Department of Obstetrics & Gynecology
- Center for Interdisciplinary Research in Women’s
Health
| | - Yong-Fang Kuo
- Center for Interdisciplinary Research in Women’s
Health
- Office of Biostatistics, Department of Preventive Medicine
and Community Health
- Institute for Translational Science, University of Texas
Medical Branch, Galveston, TX
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9
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Akter H, Sultana N, Martuza N, Siddiqua A, Dity NJ, Rahaman MA, Samara B, Sayeed A, Basiruzzaman M, Rahman MM, Rashidul Hoq M, Amin MR, Baqui MA, Woodbury-Smith M, Uddin KMF, Islam SS, Awwal R, Berdiev BK, Uddin M. Novel mutations in actionable breast cancer genes by targeted sequencing in an ethnically homogenous cohort. BMC Med Genet 2019; 20:150. [PMID: 31477031 PMCID: PMC6721087 DOI: 10.1186/s12881-019-0881-0] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/24/2019] [Accepted: 08/25/2019] [Indexed: 02/06/2023]
Abstract
Background Genetic testing is becoming an essential tool for breast cancer (BC) diagnosis and treatment pathway, and particularly important for early detection and cancer prevention. The purpose of this study was to explore the diagnostic yield of targeted sequencing of the high priority BC genes. Methods We have utilized a cost-effective targeted sequencing approach of high priority actionable BC genes (BRCA1, BRCA2, ERBB2 and TP53) in a homogeneous patient cohort from Bangladesh (n = 52) by using tumor and blood samples. Results Blood derived targeted sequencing revealed 25.58% (11/43) clinically relevant mutations (both pathogenic and variants of uncertain significance (VUS)), with 13.95% (6/43) of samples carrying a pathogenic mutations. We have identified and validated five novel pathogenic germline mutations in this cohort, comprising of two frameshift deletions in BRCA2, and missense mutations in BRCA1, BRCA2 and ERBB2 gene respectively. Furthermore, we have identified three pathogenic mutations and a VUS within three tumor samples, including a sample carrying pathogenic mutations impacting both TP53 (c.322dupG; a novel frameshift insertion) and BRCA1 genes (c.116G > A). 22% of tissue samples had a clinically relevant TP53 mutation. Although the cohort is small, we have found pathogenic mutations to be enriched in BRCA2 (9.30%, 4/43) compare to BRCA1 (4.65%, 2/43). The frequency of germline VUS mutations found to be similar in both BRCA1 (4.65%; 2/43) and BRCA2 (4.65%; 2/43) compared to ERBB2 (2.32%; 1/43). Conclusions This is the first genetic study of BC predisposition genes in this population, implies that genetic screening through targeted sequencing can detect clinically significant and actionable BC-relevant mutations. Electronic supplementary material The online version of this article (10.1186/s12881-019-0881-0) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Hosneara Akter
- NeuroGen Technologies Ltd., Genetics and Genomic Medicine Centre, Dhaka, Bangladesh
| | - Nasima Sultana
- Directorate General of Health Services, Ministry of Health and Family Welfare, Dhaka, Bangladesh
| | - Nazrana Martuza
- NeuroGen Technologies Ltd., Genetics and Genomic Medicine Centre, Dhaka, Bangladesh
| | - Aaysha Siddiqua
- NeuroGen Technologies Ltd., Genetics and Genomic Medicine Centre, Dhaka, Bangladesh
| | - Nushrat Jahan Dity
- NeuroGen Technologies Ltd., Genetics and Genomic Medicine Centre, Dhaka, Bangladesh
| | - Md Atikur Rahaman
- NeuroGen Technologies Ltd., Genetics and Genomic Medicine Centre, Dhaka, Bangladesh
| | - Bisan Samara
- Mohammed Bin Rashid University of Medicine and Health Sciences, College of Medicine, Dubai Healthcare City, Building 14, Dubai, United Arab Emirates
| | - Ahmed Sayeed
- Holy Family Red Crescent Medical College, Dhaka, Bangladesh
| | | | - Mohammad Mizanur Rahman
- NeuroGen Technologies Ltd., Genetics and Genomic Medicine Centre, Dhaka, Bangladesh.,Department of Pediatrics, Bangabandhu Sheikh Mujib Medical University (BSMMU), Dhaka, Bangladesh
| | | | - Md Robed Amin
- NeuroGen Technologies Ltd., Genetics and Genomic Medicine Centre, Dhaka, Bangladesh.,Department of Medicine, Dhaka Medical College, Dhaka, Bangladesh
| | - Md Abdul Baqui
- NeuroGen Technologies Ltd., Genetics and Genomic Medicine Centre, Dhaka, Bangladesh.,Holy Family Red Crescent Medical College, Dhaka, Bangladesh
| | - Marc Woodbury-Smith
- Institute of Neuroscience, Newcastle University, Newcastle upon Tyne, UK.,The Centre for Applied Genomics, The Hospital for Sick Children, Toronto, Ontario, Canada
| | - K M Furkan Uddin
- NeuroGen Technologies Ltd., Genetics and Genomic Medicine Centre, Dhaka, Bangladesh.,Holy Family Red Crescent Medical College, Dhaka, Bangladesh
| | - Syed S Islam
- Molecular Oncology, King Faisal Specialist Hospital and Research Centre, Riyadh, Saudi Arabia
| | - Rayhana Awwal
- Sheikh Hasina National Institute of Burn & Plastic Surgery, Dhaka, Bangladesh
| | - Bakhrom K Berdiev
- Mohammed Bin Rashid University of Medicine and Health Sciences, College of Medicine, Dubai Healthcare City, Building 14, Dubai, United Arab Emirates.
| | - Mohammed Uddin
- Mohammed Bin Rashid University of Medicine and Health Sciences, College of Medicine, Dubai Healthcare City, Building 14, Dubai, United Arab Emirates. .,The Centre for Applied Genomics, The Hospital for Sick Children, Toronto, Ontario, Canada.
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10
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Azar B. Profile of Daniel A. Haber. Proc Natl Acad Sci U S A 2019; 116:5840-5842. [DOI: 10.1073/pnas.1903223116] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
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11
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Suryavanshi M, Kumar D, Panigrahi MK, Chowdhary M, Mehta A. Detection of false positive mutations in BRCA gene by next generation sequencing. Fam Cancer 2017; 16:311-7. [PMID: 27848044 DOI: 10.1007/s10689-016-9955-8] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
BRCA1 and BRCA2 genes are implicated in 20-25% of hereditary breast and ovarian cancers. New age sequencing platforms have revolutionized massively parallel sequencing in clinical practice by providing cost effective, rapid, and sensitive sequencing. This study critically evaluates the false positives in multiplex panels and suggests the need for careful analysis. We employed multiplex PCR based BRCA1 and BRCA2 community Panel with ion torrent PGM machine for evaluation of these mutations. Out of all 41samples analyzed for BRCA1 and BRCA2 five were found with 950_951 insA(Asn319fs) at Chr13:32906565 position and one sample with 1032_1033 insA(Asn346fs) at Chr13:32906647, both being frame-shift mutations in BRCA2 gene. 950_951 insA(Asn319fs) mutation is reported as pathogenic allele in NCBI dbSNP. On examination of IGV for all these samples, it was seen that both mutations had 'A' nucleotide insertion at 950, and 1032 position in exon 10 of BRCA2 gene. Sanger Sequencing did not confirm these insertions. Next-generation sequencing shows great promise by allowing rapid mutational analysis of multiple genes in human cancer but our results indicate the need for careful sequence analysis to avoid false positive results.
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Guo F, Hirth JM, Lin YL, Richardson G, Levine L, Berenson AB, Kuo YF. Use of BRCA Mutation Test in the U.S., 2004-2014. Am J Prev Med 2017; 52:702-709. [PMID: 28342662 PMCID: PMC5370584 DOI: 10.1016/j.amepre.2017.01.027] [Citation(s) in RCA: 57] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/26/2016] [Revised: 12/09/2016] [Accepted: 01/12/2017] [Indexed: 11/16/2022]
Abstract
INTRODUCTION BRCA mutation testing has been used for screening women at high risk of breast and ovarian cancer and for selecting the best treatment for those with breast cancer. To optimize the infrastructure and medical resources allocation for genetic testing, it is important to understand the use of BRCA mutation testing in the U.S. health system. METHODS This retrospective cohort study included 53,254 adult women with insurance claims for BRCA mutation testing between 2004 and 2014 from ClinformaticsTM Data Mart Database. Data analysis was performed in 2016. This study assessed trends in the use of BRCA mutation testing in women with previously diagnosed breast or ovarian cancer and those without (unaffected women). RESULTS Between 2004 and 2014, of those receiving BRCA testing, the proportion of BRCA tests performed in unaffected women increased significantly (p<0.001), from 24.3% in 2004 to 61.5% in 2014. An increase in the proportion of BRCA tests used in unaffected women was found in each characteristic subgroup. In 2014, most subgroups had a proportion surpassing 50%, except for those aged 51-65 years and those without a family history of breast cancer. There was a much lower proportion of those aged 20-40 years among tested women with previously diagnosed breast or ovarian cancer than in unaffected women (17.6% vs 41.7%, p<0.001). CONCLUSIONS During the past decade, the role of BRCA testing has gradually shifted from being used primarily in cancer patients to being used in unaffected women in the U.S.
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Affiliation(s)
- Fangjian Guo
- Department of Obstetrics and Gynecology, University of Texas Medical Branch, Galveston, Texas; Center for Interdisciplinary Research in Women's Health, University of Texas Medical Branch, Galveston, Texas.
| | - Jacqueline M Hirth
- Department of Obstetrics and Gynecology, University of Texas Medical Branch, Galveston, Texas; Center for Interdisciplinary Research in Women's Health, University of Texas Medical Branch, Galveston, Texas
| | - Yu-Li Lin
- Center for Interdisciplinary Research in Women's Health, University of Texas Medical Branch, Galveston, Texas; Office of Biostatistics, Department of Preventive Medicine and Community Health, University of Texas Medical Branch, Galveston, Texas
| | - Gwyn Richardson
- Department of Obstetrics and Gynecology, University of Texas Medical Branch, Galveston, Texas; Center for Interdisciplinary Research in Women's Health, University of Texas Medical Branch, Galveston, Texas
| | - Lyuba Levine
- Department of Obstetrics and Gynecology, University of Texas Medical Branch, Galveston, Texas; Center for Interdisciplinary Research in Women's Health, University of Texas Medical Branch, Galveston, Texas
| | - Abbey B Berenson
- Department of Obstetrics and Gynecology, University of Texas Medical Branch, Galveston, Texas; Center for Interdisciplinary Research in Women's Health, University of Texas Medical Branch, Galveston, Texas
| | - Yong-Fang Kuo
- Center for Interdisciplinary Research in Women's Health, University of Texas Medical Branch, Galveston, Texas; Office of Biostatistics, Department of Preventive Medicine and Community Health, University of Texas Medical Branch, Galveston, Texas; Departments of Internal Medicine and Sealy Center on Aging, University of Texas Medical Branch, Galveston, Texas; Institute for Translational Science, University of Texas Medical Branch, Galveston, Texas
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Rummel SK, Lovejoy L, Shriver CD, Ellsworth RE. Contribution of germline mutations in cancer predisposition genes to tumor etiology in young women diagnosed with invasive breast cancer. Breast Cancer Res Treat 2017; 164:593-601. [DOI: 10.1007/s10549-017-4291-8] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2017] [Accepted: 05/10/2017] [Indexed: 11/25/2022]
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Marhold M, Bartsch R, Zielinski C. Recent developments and translational aspects in targeted therapy for metastatic breast cancer. ESMO Open 2016; 1:e000036. [PMID: 27843605 PMCID: PMC5070263 DOI: 10.1136/esmoopen-2016-000036] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2016] [Revised: 03/26/2016] [Accepted: 04/01/2016] [Indexed: 01/08/2023] Open
Abstract
Biologically distinct subtypes of metastatic breast cancer (MBC) have been defined by multiple efforts in recent years, showing broad heterogeneity at the molecular level of disease. Throughout this endeavour, oncogenic drivers within MBC were identified as potential therapeutic targets. With recent results from clinical trials targeting these well-known cancer-promoting pathways, this review is trying to elucidate as well as summarise current new therapeutic aspects in MBC and shed light on translational aspects within this entity.
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Affiliation(s)
- Maximilian Marhold
- Department for Internal Medicine I-Oncology , Comprehensive Cancer Center and Medical University Vienna , Vienna , Austria
| | - Rupert Bartsch
- Department for Internal Medicine I-Oncology , Comprehensive Cancer Center and Medical University Vienna , Vienna , Austria
| | - Christoph Zielinski
- Department for Internal Medicine I-Oncology , Comprehensive Cancer Center and Medical University Vienna , Vienna , Austria
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15
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Kast K, Rhiem K, Wappenschmidt B, Hahnen E, Hauke J, Bluemcke B, Zarghooni V, Herold N, Ditsch N, Kiechle M, Braun M, Fischer C, Dikow N, Schott S, Rahner N, Niederacher D, Fehm T, Gehrig A, Mueller-Reible C, Arnold N, Maass N, Borck G, de Gregorio N, Scholz C, Auber B, Varon-Manteeva R, Speiser D, Horvath J, Lichey N, Wimberger P, Stark S, Faust U, Weber BHF, Emons G, Zachariae S, Meindl A, Schmutzler RK, Engel C. Prevalence of BRCA1/2 germline mutations in 21 401 families with breast and ovarian cancer. J Med Genet 2016; 53:465-71. [PMID: 26928436 DOI: 10.1136/jmedgenet-2015-103672] [Citation(s) in RCA: 124] [Impact Index Per Article: 15.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2015] [Accepted: 02/02/2016] [Indexed: 01/14/2023]
Abstract
PURPOSE To characterise the prevalence of pathogenic germline mutations in BRCA1 and BRCA2 in families with breast cancer (BC) and ovarian cancer (OC) history. PATIENTS AND METHODS Data from 21 401 families were gathered between 1996 and 2014 in a clinical setting in the German Consortium for Hereditary Breast and Ovarian Cancer, comprising full pedigrees with cancer status of all individual members at the time of first counselling, and BRCA1/2 mutation status of the index patient. RESULTS The overall BRCA1/2 mutation prevalence was 24.0% (95% CI 23.4% to 24.6%). Highest mutation frequencies were observed in families with at least two OCs (41.9%, 95% CI 36.1% to 48.0%) and families with at least one breast and one OC (41.6%, 95% CI 40.3% to 43.0%), followed by male BC with at least one female BC or OC (35.8%; 95% CI 32.2% to 39.6%). In families with a single case of early BC (<36 years), mutations were found in 13.7% (95% CI 11.9% to 15.7%). Postmenopausal unilateral or bilateral BC did not increase the probability of mutation detection. Occurrence of premenopausal BC and OC in the same woman led to higher mutation frequencies compared with the occurrence of these two cancers in different individuals (49.0%; 95% CI 41.0% to 57.0% vs 31.5%; 95% CI 28.0% to 35.2%). CONCLUSIONS Our data provide guidance for healthcare professionals and decision-makers to identify individuals who should undergo genetic testing for hereditary breast and ovarian cancer. Moreover, it supports informed decision-making of counselees on the uptake of genetic testing.
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Affiliation(s)
- Karin Kast
- Department of Gynecology and Obstetrics, University Hospital Carl Gustav Carus, TU Dresden, Dresden, Germany German Cancer Consortium (DKTK) Dresden and German Cancer Research Center (DKFZ), Heidelberg, Germany
| | - Kerstin Rhiem
- Center for Hereditary Breast and Ovarian Cancer, Center for Integrated Oncology (CIO) and Center for Molecular Medicine Cologne (CMMC), Medical Faculty, University of Cologne and University Hospital Cologne, Cologne, Germany
| | - Barbara Wappenschmidt
- Center for Hereditary Breast and Ovarian Cancer, Center for Integrated Oncology (CIO) and Center for Molecular Medicine Cologne (CMMC), Medical Faculty, University of Cologne and University Hospital Cologne, Cologne, Germany
| | - Eric Hahnen
- Center for Hereditary Breast and Ovarian Cancer, Center for Integrated Oncology (CIO) and Center for Molecular Medicine Cologne (CMMC), Medical Faculty, University of Cologne and University Hospital Cologne, Cologne, Germany
| | - Jan Hauke
- Center for Hereditary Breast and Ovarian Cancer, Center for Integrated Oncology (CIO) and Center for Molecular Medicine Cologne (CMMC), Medical Faculty, University of Cologne and University Hospital Cologne, Cologne, Germany
| | - Britta Bluemcke
- Center for Hereditary Breast and Ovarian Cancer, Center for Integrated Oncology (CIO) and Center for Molecular Medicine Cologne (CMMC), Medical Faculty, University of Cologne and University Hospital Cologne, Cologne, Germany
| | - Verena Zarghooni
- Center for Hereditary Breast and Ovarian Cancer, Center for Integrated Oncology (CIO) and Center for Molecular Medicine Cologne (CMMC), Medical Faculty, University of Cologne and University Hospital Cologne, Cologne, Germany
| | - Natalie Herold
- Center for Hereditary Breast and Ovarian Cancer, Center for Integrated Oncology (CIO) and Center for Molecular Medicine Cologne (CMMC), Medical Faculty, University of Cologne and University Hospital Cologne, Cologne, Germany
| | - Nina Ditsch
- Department for Gynecology and Obstetrics, LMU Munich, Munich, Germany
| | - Marion Kiechle
- Department for Gynecology and Obstetrics, Technical University of Munich, Munich, Germany
| | - Michael Braun
- Breast Center, Department of Gynecology, Red Cross Hospital, Munich, Germany
| | - Christine Fischer
- Institute of Human Genetics, Heidelberg University, Heidelberg, Germany
| | - Nicola Dikow
- Institute of Human Genetics, Heidelberg University, Heidelberg, Germany
| | - Sarah Schott
- Department of Gynecology and Obstetrics, Heidelberg University Hospital, Heidelberg, Germany German Cancer Consortium (DKTK), NCT Heidelberg and German Cancer Research Center (DKFZ), Heidelberg, Germany
| | - Nils Rahner
- Medical Faculty, Institute of Human Genetics and Anthropology, Heinrich-Heine University, Düsseldorf, Germany
| | - Dieter Niederacher
- Department of Gynecology and Obstetrics, Medical Faculty, Heinrich-Heine University, Düsseldorf, Germany
| | - Tanja Fehm
- Department of Gynecology and Obstetrics, Medical Faculty, Heinrich-Heine University, Düsseldorf, Germany
| | - Andrea Gehrig
- Department of Human Genetics, University of Wuerzburg, Würzburg, Germany
| | | | - Norbert Arnold
- Department of Gynaecology and Obstetrics, University Hospital of Schleswig-Holstein, Campus Kiel, Christian-Albrechts University Kiel, Kiel, Germany
| | - Nicolai Maass
- Department of Gynaecology and Obstetrics, University Hospital of Schleswig-Holstein, Campus Kiel, Christian-Albrechts University Kiel, Kiel, Germany
| | - Guntram Borck
- Institute of Human Genetics, University of Ulm, Ulm, Germany
| | - Nikolaus de Gregorio
- Department of Gynecology and Obstetrics, University Hospital, Universität Ulm, Ulm, Germany
| | - Caroline Scholz
- Institute of Human Genetics, Hannover Medical School, Hannover, Germany
| | - Bernd Auber
- Institute of Human Genetics, Hannover Medical School, Hannover, Germany
| | | | - Dorothee Speiser
- Department of Gynecology, Charité University Medicine Berlin, Berlin, Germany
| | - Judit Horvath
- Institute for Human Genetics, University of Muenster, Münster, Germany
| | - Nadine Lichey
- Institute for Human Genetics, University of Muenster, Münster, Germany
| | - Pauline Wimberger
- Department of Gynecology and Obstetrics, University Hospital Carl Gustav Carus, TU Dresden, Dresden, Germany German Cancer Consortium (DKTK) Dresden and German Cancer Research Center (DKFZ), Heidelberg, Germany
| | - Sylvia Stark
- Department of Gynecology and Obstetrics, University of Leipzig, Leipzig, Germany
| | - Ulrike Faust
- Institute of Medical Genetics and Applied Genomics, University of Tuebingen, Tübingen, Germany
| | - Bernhard H F Weber
- Institute of Human Genetics, University of Regensburg, Regensburg, Germany
| | - Gunter Emons
- Department of Obstetrics and Gynecology, University of Göttingen, Göttingen, Germany
| | - Silke Zachariae
- Institute for Medical Informatics, Statistics and Epidemiology, University of Leipzig, Leipzig, Germany
| | - Alfons Meindl
- Department for Gynecology and Obstetrics, Technical University of Munich, Munich, Germany
| | - Rita K Schmutzler
- Center for Hereditary Breast and Ovarian Cancer, Center for Integrated Oncology (CIO) and Center for Molecular Medicine Cologne (CMMC), Medical Faculty, University of Cologne and University Hospital Cologne, Cologne, Germany
| | - Christoph Engel
- Institute for Medical Informatics, Statistics and Epidemiology, University of Leipzig, Leipzig, Germany
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16
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Lee SH, Zhou S, Zhou T, Hong G. Sanger Sequencing for BRCA1 c.68_69del, BRCA1 c.5266dup and BRCA2 c.5946del Mutation Screen on Pap Smear Cytology Samples. Int J Mol Sci 2016; 17:229. [PMID: 26867194 PMCID: PMC4783961 DOI: 10.3390/ijms17020229] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2015] [Revised: 02/01/2016] [Accepted: 02/04/2016] [Indexed: 01/06/2023] Open
Abstract
Three sets of polymerase chain reaction (PCR) primers were designed for heminested PCR amplification of the target DNA fragments in the human genome which include the site of BRCA1 c.68_69del, BRCA1 c.5266dup and BRCA2 c.5946del respectively, to prepare the templates for direct Sanger sequencing screen of these three founder mutations. With a robust PCR mixture, crude proteinase K digestate of the fixed cervicovaginal cells in the liquid-based Papanicolaou (Pap) cytology specimens can be used as the sample for target DNA amplification without pre-PCR DNA extraction, purification and quantitation. The post-PCR products can be used directly as the sequencing templates without further purification or quantitation. By simplifying the frontend procedures for template preparation, the cost for screening these three founder mutations can be reduced to about US $200 per test when performed in conjunction with human papillomavirus (HPV) assays now routinely ordered for cervical cancer prevention. With this projected price structure, selective patients in a high-risk population can be tested and each provided with a set of DNA sequencing electropherograms to document the absence or presence of these founder mutations in her genome to help assess inherited susceptibility to breast and ovarian cancer in this era of precision molecular personalized medicine.
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Affiliation(s)
- Sin Hang Lee
- Milford Hospital and Milford Molecular Diagnostics Laboratory, 2044 Bridgeport Avenue, Milford, CT 06460, USA.
| | - Shaoxia Zhou
- State Key Laboratory of Molecular Biology, Institute of Biochemistry and Cell Biology, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, 320 Yueyang Road, Shanghai 200031, China.
- College of Plant Protection, Nanjing Agricultural University, Nanjing 210095, China.
| | - Tianjun Zhou
- State Key Laboratory of Molecular Biology, Institute of Biochemistry and Cell Biology, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, 320 Yueyang Road, Shanghai 200031, China.
| | - Guofan Hong
- State Key Laboratory of Molecular Biology, Institute of Biochemistry and Cell Biology, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, 320 Yueyang Road, Shanghai 200031, China.
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Kelly KM, Ellington L, Schoenberg N, Jackson T, Dickinson S, Porter K, Leventhal H, Andrykowski M. Genetic counseling content: How does it impact health behavior? J Behav Med 2015; 38:766-76. [PMID: 25533642 PMCID: PMC4478279 DOI: 10.1007/s10865-014-9613-2] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2014] [Accepted: 12/08/2014] [Indexed: 01/11/2023]
Abstract
Women with hereditary breast-ovarian cancer face decisions about screening (transvaginal ultrasound, CA125, mammography, breast exams) and proactive (before cancer) or reactive (after cancer) surgery (oophorectomy, mastectomy). The content of genetic counseling and its relation to these key health behaviors is largely unexamined. Ashkenazi Jewish women (n = 78) were surveyed through the process of genetic testing and had audiorecorded counseling sessions available for Linguistic Inquiry and Word Count analysis. Proportions for participant and counselor cognitive and affective content during sessions were used as primary predictor variables in linear mixed models for change in intentions for screening and treatment and in self-reported screening. Cognitive and affective content were important predictors of behavior. Counselor cognitive content was associated with ovarian screening. An interaction effect also emerged for CA-125, such that counselor cognitive content plus participant cognitive content or counselor affective content were associated with more screening. Teasing out the factors in risk communication that impact decision-making are critical, and affect from a risk communicator can spur action, such as cancer screening.
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Affiliation(s)
- Kimberly M Kelly
- Mary Babb Randolph Cancer Center and School of Pharmacy, Health Science Center, West Virginia University, PO Box 9510, Morgantown, WV, 26506, USA.
| | - Lee Ellington
- College of Nursing, University of Utah, Salt Lake City, UT, USA
| | - Nancy Schoenberg
- Department of Behavioral Science, University of Kentucky, Lexington, KY, USA
| | - Thomas Jackson
- Department of Statistics, Indiana University, Bloomington, IN, USA
| | | | - Kyle Porter
- Center for Biostatistics, The Ohio State University, Columbus, OH, USA
| | - Howard Leventhal
- Institute for Health, Rutgers, The State University of New Jersey, New Brunswick, NJ, USA
| | - Michael Andrykowski
- Department of Behavioral Science, University of Kentucky, Lexington, KY, USA
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Kelly K, Leventhal H, Toppmeyer D, Much J, Dermody J, Marvin M, Baran J, Schwalb M. Subjective and Objective Risks of Carrying a BRCA1/2 Mutation in Individuals of Ashkenazi Jewish Descent. J Genet Couns 2015; 12:351-71. [PMID: 26141175 DOI: 10.1023/a:1023905106360] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
This repeated measures study examines (1) the change in subjective risk of mutations pre- to postcounseling, (2) the accuracy of BRCAPRO estimates of mutations, and (3) the discrepancy between subjective risk and BRCAPRO estimates of mutations before and after genetic counseling. Ninety-nine Ashkenazi Jewish individuals pursued testing for BRCA1/2 mutations. Most had a personal cancer history (N = 51; family only: N = 48); and received uninformative negative results (N = 66; positives: N = 23; informative negative: N = 10). The coping strategy of defensive pessimism predicts that individuals will believe the worst case scenario to better cope with a potential negative outcome. Consistent with this, most felt they would have a mutation, if not mutations in both genes. The BRCAPRO model appeared to overestimate risk of having a mutation in this sample (p < .001). BRCAPRO overestimates notwithstanding, genetic counseling increased accuracy of subjective risk (p < .01). Individuals with a family-only cancer history had the least accurate estimates of risk (p < .05) and may need further intervention to either manage anxiety or improve knowledge.
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Affiliation(s)
- Kimberly Kelly
- Department of Behavioral Science, University of Kentucky, Lexington, Kentucky,
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Wei XQ, Li X, Xin XJ, Tong ZS, Zhang S. Clinical features and survival analysis of very young (age<35) breast cancer patients. Asian Pac J Cancer Prev 2014; 14:5949-52. [PMID: 24289606 DOI: 10.7314/apjcp.2013.14.10.5949] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
OBJECTIVES To compare the clinicalpathological features and prognosis between premenopausal breast cancer patients aged of <35 and ≥35 years old. METHODS The clinical data and survival status of 1498 cases premenopausal operable breast cancer treated in our hospital from 2002.1 to 2004. 12 were collected, 118 cases were aged <35. They were divided into 4 groups: Luminal A, Luminal B, HER2-positive, Triple-negative. The disease free survival (DFS) and overall survival (OS) were identified. RESULTS The 5-year DFS and OS rates were significantly lower in age<35 than in age≥35 patients. In the Luminal B, HER2-positive, Triple-negative group, the 5-year recurrence risk was higher in age<35 than in age≥35 patients, and age<35 patients' 5-year death risk was higher only in Luminal B, Triple-negative group. Regardless of whether lymph node involved, age<35 patients had a bad prognosis in both DFS and OS. CONCLUSIONS Compared with premenopausal age ≥35 breast cancer, age<35 patients had a worse outcome.
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Affiliation(s)
- Xue-Qing Wei
- Department of Ultrasonic Diagnosis and Treatment, Tianjin Medical University Cancer Institute and Hospital, National Clinical Research Center for Cancer, Key Laboratory of Cancer Prevention and Therapy, Tianjin, China E-mail :
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Cao YW, Fu XG, Wan GX, Yu SY, Cui XB, Li L, Jiang JF, Zheng YQ, Zhang WJ, Li F. BRCA1 gene exon 11 mutations in Uighur and Han women with early-onset sporadic breast cancer in the northwest region of China. Asian Pac J Cancer Prev 2014; 15:4513-8. [PMID: 24969878 DOI: 10.7314/apjcp.2014.15.11.4513] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
The prevalence of BRCA1 gene mutations in breast cancer differs between diverse ethnic groups. Relatively little information is known about patterns of BRCA1 mutations in early-onset breast cancer in women of Uighur or Han descent, the major ethnic populations of the Xinjiang region in China. The aim of this study was to identify BRCA1 mutations in Uighur and Han patients with early-onset (age <35 years), and sporadic breast cancer for genetic predisposition to breast cancer. For detection of BRCA1 mutations, we used a polymerase chain reaction single-stranded conformation polymorphism approach, followed by direct DNA sequencing in 22 Uighur and 13 Han women with early-onset sporadic breast cancer, and 32 women with benign breast diseases. The prevalence of BRCA1 mutations in this population was 22.9% (8/35) among early-onset sporadic breast cancer cases. Of these, 31.8% (7/22) of Uighur patients and 7.69% (1/13) of Han patients were found to have BRCA1 mutations. In 7 Uighur patients with BRCA1 mutations, there were 11 unique sequence alterations in the BRCA1 gene, including 4 clearly disease-associated mutations on exon 11 and 3 variants of uncertain clinical significance on exon 11, meanwhile 4 neutral variants on intron 20 or 2. None of the 11 BRCA1 mutations identified have been previously reported in the Breast Cancer Information Core database. These findings reflect the prevalence of BRCA1 mutations in Uighur women with early-onset and sporadic breast cancer, which will allow for provision of appropriate genetic counseling and treatment for Uighur patients in the Xinjiang region.
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Affiliation(s)
- Yu-Wen Cao
- Department of Oncology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, China E-mail :
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Bell K, Hodgson N, Levine M, Sadikovic B, Zbuk K. Double heterozygosity for germline mutations in BRCA1 and p53 in a woman with early onset breast cancer. Breast Cancer Res Treat 2014; 146:447-50. [PMID: 24916180 DOI: 10.1007/s10549-014-3011-x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2014] [Accepted: 05/26/2014] [Indexed: 10/25/2022]
Abstract
To report on a highly unusual case of a 20-year-old woman who presented with multifocal metaplastic breast cancer and was subsequently found to carry deleterious germline mutations in both BRCA1 and p53. Genetic testing was requested on an expedited basis to assist in surgical decision-making and BRCA1/2 and p53 genetic analysis was ordered concurrently. BRCA1/2 and p53 analyses were completed using a combination of direct DNA sequencing and multiplex ligation probe amplification (MLPA). The patient was found to carry a deletion of exon 3 of the BRCA1 gene and a splice site mutation at the exon4/intron4 boundary of the p53 gene. To our knowledge, this is the first report of double heterozygosity in BRCA1 and p53. The patient's clinical presentation is highly reminiscent of that predicted by preclinical mouse models. In patients with early onset breast cancer, the possibility of germline mutations in more than one cancer susceptibility gene should be considered. This could have important clinical implications for patients and their at-risk family members.
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Lopez R, Agullo P, Lakshmanaswamy R. Links between obesity, diabetes and ethnic disparities in breast cancer among Hispanic populations. Obes Rev 2013; 14:679-91. [PMID: 23611507 DOI: 10.1111/obr.12030] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/04/2012] [Revised: 01/25/2013] [Accepted: 02/18/2013] [Indexed: 12/27/2022]
Abstract
Breast cancer is the most prevalent malignancy in women worldwide and is a growing concern due to rising incidence and ongoing ethnic disparities in both incidence and mortality. A number of factors likely contribute to these trends including rising rates of obesity and diabetes across the globe and differences in genetic predisposition. Here, we emphasize Hispanic populations and summarize what is currently known about obesity, diabetes and individual genetic predisposition as they relate to ethnic disparities in breast cancer incidence and mortality. In addition, we discuss potential contributions to breast cancer aetiology from molecular mechanisms associated with obesity and diabetes including dyslipidemia, hyperglycaemia, hyperinsulinaemia, endocrine dysfunction and inflammation. We propose that unique differences in diet and lifestyle coupled with individual genetic predisposition and endocrine/immune dysfunction explain most of the ethnic disparities seen in breast cancer incidence and mortality.
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Affiliation(s)
- R Lopez
- Center of Excellence in Cancer Research, Center of Excellence in Diabetes Research, Department of Biomedical Sciences MSB1, Texas Tech University Health Sciences Center, Paul L. Foster School of Medicine, El Paso, TX 79905, USA
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Yang G, Nowsheen S, Aziz K, Georgakilas AG. Toxicity and adverse effects of Tamoxifen and other anti-estrogen drugs. Pharmacol Ther 2013; 139:392-404. [PMID: 23711794 DOI: 10.1016/j.pharmthera.2013.05.005] [Citation(s) in RCA: 99] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2013] [Accepted: 05/13/2013] [Indexed: 01/20/2023]
Abstract
Breast cancer is a heterogeneous disease affecting thousands of people every year. Multiple factors are responsible in causing breast cancer while a number of treatment options are also available for the disease. Tamoxifen is the most widely used anti-estrogen for the treatment of hormone-dependent breast cancer. The specific drug is used as a hormonal therapy for patients who exhibit estrogen receptor positive breast cancer. The pharmacological activity of Tamoxifen is dependent on its conversion to its active metabolite, endoxifen, by CYP2D6. Tamoxifen reduces the risk of recurrence and death from breast cancer when given as adjuvant therapy and provides effective palliation for patients with metastatic breast cancer. In this review we focus on the role of Tamoxifen in breast cancer treatment including mechanisms and side-effects. Finally, we discuss in detail the exciting prospects that lie ahead.
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Affiliation(s)
- Geniey Yang
- Department of Biology, Thomas Harriot College of Arts and Sciences, East Carolina University, Greenville, NC 27858, USA
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Bianco A, Quaresima B, Pileggi C, Faniello MC, De Lorenzo C, Costanzo F, Pavia M. Polymorphic repeat length in the AIB1 gene and breast cancer risk in BRCA1 and BRCA2 mutation carriers: a meta-analysis of observational studies. PLoS One 2013; 8:e57781. [PMID: 23483928 PMCID: PMC3590298 DOI: 10.1371/journal.pone.0057781] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2012] [Accepted: 01/24/2013] [Indexed: 11/18/2022] Open
Abstract
OBJECTIVES We carried out a meta-analysis focusing on the relationship between length of AIB1 gene poly-Q repeat domain as a modifier of breast cancer (BC) susceptibility in patients with BRCA1 and BRCA2 mutation carriers. DATA SOURCES We searched MEDLINE and EMBASE for all medical literature published until February, 2012. STUDY ELIGIBILITY CRITERIA Studies were included in the meta-analysis if they met all the predetermined criteria, such as: (a) case-control or cohort studies; (b) the primary outcome was clearly defined as BC; (c) the exposure of interest measured was AIB1 polyglutamine repeat length genotype; (d) provided relative risk (RR) or odds ratio (OR) estimates and their 95% confidence intervals (CIs). SYNTHESIS METHODS: Two of the authors independently evaluated the quality of the studies included and extracted the data. Meta-analyses were performed for case-control and cohort studies separately. Heterogeneity was examined and the publication bias was assessed with a funnel plot for asymmetry. RESULT 7 studies met our predetermined inclusion criteria and were included in the meta-analysis. Overall quality ratings of the studies varied from 0.36 to 0.77, with a median of 0.5. The overall RR estimates of 29/29 poly-Q repeats on risk of BC in BRCA1/2, BRCA1, and BRCA2, were always greater than 1.00; however, this effect was not statistically significant. In the meta-analysis of studies reporting the effect of 28/28 poly-Q repeats on risk of BC in BRCA1/2, BRCA1, and BRCA2, the overall RR decreased below 1.00; however, this effect was not statistically significant. Similar estimates were shown for at least 1 allele of ≤26 repeats. CONCLUSIONS Genotypes of AIB1 polyglutamine polymorphism analyzed do not appear to be associated to a modified risk of BC development in BRCA1 and BRCA2 mutation carriers. Future research on length of poly-Q repeat domain and BC susceptibility should be discouraged and more promising potential sources of penetrance variation among BRCA1 and BRCA2 mutation carriers should be investigated.
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Affiliation(s)
- Aida Bianco
- Department of Health Sciences, University of Catanzaro Magna Græcia, Catanzaro, Italy
| | - Barbara Quaresima
- Department of Experimental and Clinical Medicine, University of Catanzaro Magna Græcia, Catanzaro, Italy
| | - Claudia Pileggi
- Department of Health Sciences, University of Catanzaro Magna Græcia, Catanzaro, Italy
| | - Maria Concetta Faniello
- Department of Experimental and Clinical Medicine, University of Catanzaro Magna Græcia, Catanzaro, Italy
| | - Carlo De Lorenzo
- Department of Experimental and Clinical Medicine, University of Catanzaro Magna Græcia, Catanzaro, Italy
| | - Francesco Costanzo
- Department of Experimental and Clinical Medicine, University of Catanzaro Magna Græcia, Catanzaro, Italy
| | - Maria Pavia
- Department of Health Sciences, University of Catanzaro Magna Græcia, Catanzaro, Italy
- * E-mail:
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Abstract
Tumor Markers comprise a wide spectrum of biomacromolecules synthesized in excess concentration by a wide variety of neoplastic cells. The markers could be endogenous products of highly active metabolic malignant cells or the products of newly switched on genes, which remained unexprssed in early life or newly acquired antigens at cellular and sub-cellular levels. The appearance of tumor marker and their concentration are related to the genesis and growth of malignant tumors in patients. An ideal tumor marker should be highly sensitive, specific, reliable with high prognostic value, organ specificity and it should correlate with tumor stages. However, none of the tumor markers reported to date has all these characteristics. Inspite of these limitations, many tumor markers have shown excellent clinical relevance in monitoring efficacy of different modes of therapies during entire course of illness in cancer patients. Additionally, determination of markers also helps in early detection of cancer recurrence and in prognostication.
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Affiliation(s)
- T Malati
- Department of Biochemistry, Nizam's Institute of Medical Sciences, Punjagutta, 5000 082 Hyderabad, India
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Niravath P, Rimawi M. Challenges in the treatment of younger women with breast cancer. Breast Cancer Management 2012. [DOI: 10.2217/bmt.12.25] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
SUMMARY Breast cancer in the younger patient is a perplexing issue for many clinicians because the topic is fraught with so much uncertainty. While most clinicians know that young women unfortunately fare worse after a breast cancer diagnosis, it is not clear how to best improve that outcome. Issues that are unique to young, premenopausal women regarding both local and systemic therapy will be discussed in this article. Additionally, the side effects of surgery, radiation, chemotherapy and hormonal therapy can be particularly damaging to a younger woman’s quality of life. In particular, sexual dysfunction and infertility are common problems that are extremely important to young patients, although many doctors actually avoid these topics because of unfamiliarity with their management. This article aims to shed light on these clinically relevant topics.
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Affiliation(s)
- Polly Niravath
- Lester & Sue Smith Breast Center, Dan L Duncan Cancer Center & Department of Medicine, Baylor College of Medicine, 1 Baylor Plaza, BCM 660 Houston, TX 77030, USA
| | - Mothaffar Rimawi
- Lester & Sue Smith Breast Center, Dan L Duncan Cancer Center & Department of Medicine, Baylor College of Medicine, 1 Baylor Plaza, BCM 660 Houston, TX 77030, USA
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Jalkh N, Nassar-Slaba J, Chouery E, Salem N, Uhrchammer N, Golmard L, Stoppa-Lyonnet D, Bignon YJ, Mégarbané A. Prevalance of BRCA1 and BRCA2 mutations in familial breast cancer patients in Lebanon. Hered Cancer Clin Pract 2012; 10:7. [PMID: 22713736 PMCID: PMC3441239 DOI: 10.1186/1897-4287-10-7] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2012] [Accepted: 06/19/2012] [Indexed: 12/27/2022] Open
Abstract
Breast cancer is the most prevalent malignancy in women in Western countries, currently accounting for one third of all female cancers. Familial aggregation is thought to account for 5–10 % of all BC cases, and germline mutations in BRCA1 and BRCA2 account for less of the half of these inherited cases. In Lebanon, breast cancer represents the principal death-causing malignancy among women, with 50 % of the cases diagnosed before the age of 50 years. In order to study BRCA1/2 mutation spectra in the Lebanese population, 72 unrelated patients with a reported family history of breast and/or ovarian cancers or with an early onset breast cancer were tested. Fluorescent direct sequencing of the entire coding region and intronic sequences flanking each exon was performed. A total of 38 BRCA1 and 40 BRCA2 sequence variants were found. Seventeen of them were novel. Seven confirmed deleterious mutations were identified in 9 subjects providing a frequency of mutations of 12.5 %. Fifteen variants were considered of unknown clinical significance according to BIC and UMD-BRCA1/BRCA2 databases. In conclusion, this study represents the first evaluation of the deleterious and unclassified genetic variants in the BRCA1/2 genes found in a Lebanese population with a relatively high risk of breast cancer.
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Affiliation(s)
- Nadine Jalkh
- Unité de Génétique Médicale et laboratoire associé INSERM à l'Unité UMR_S910, Université Saint-Joseph, Beirut, Lebanon.
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28
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Abstract
If a woman develops invasive breast cancer in the left breast at age 30, the probability of her developing breast cancer in the right breast by age 40 is about 5% (0.5% per year) 1.[...]
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Abstract
BACKGROUND Despite the higher incidence of breast cancer in young women in developing countries, there is a paucity of data on their management. We present the clinicopathological features and outcome of treatment of women 35 years or younger with breast cancer in a resource-restricted environment. METHODS A total of 141 patients who were diagnosed with primary breast cancer at 35 years or younger from January 2000 to June 2008 were retrieved from the cancer registry of a breast clinic at a tertiary hospital and a private breast health center in South Africa. Clinicopathological features, treatment, and survival were analyzed. RESULTS Two patients presented with TNM stage 0 (1.4%), 14 with stage I (9.9%), 47 with stage II (33.35%), 47 with stage III (33.3%), and 31 with stage IV (21.9%). Tumor grade was 3 in 47%, grade 2 in 37%, and grade 1 in 16% of patients. One hundred and four patients with stage 0-III disease underwent treatment with curative intent, 83 had a mastectomy, and 12 had breast-conserving surgery. Ninety patients (86.5%) had chemotherapy, 68 (65.4%) had radiotherapy, and 50 (48.1%) had hormonal therapy. Of 93 patients who completed primary therapy, 4 developed contralateral cancers, 3 had locoregional recurrence, 8 developed synchronous locoregional and distant recurrence, and 19 relapsed with distant metastasis only. The 2-year disease-free and overall survival for stage 0-III disease was 48 and 56%, respectively. CONCLUSIONS Young women with breast cancer in a resource-limited environment have similar adverse clinicopathological features to those in developed countries. Their disease is more advanced at presentation with poorer outcome. Increased awareness, better systemic therapy, and more comprehensive genetic studies are essential to improve the dismal outcome.
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30
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Negura L, Uhrhammer N, Negura A, Artenie V, Carasevici E, Bignon YJ. Complete BRCA mutation screening in breast and ovarian cancer predisposition families from a North-Eastern Romanian population. Fam Cancer 2010; 9:519-23. [PMID: 20567915 DOI: 10.1007/s10689-010-9361-6] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
Breast cancer is the most common cancer in women worldwide, including Romania, where its incidence has increased significantly during the last decade. Ovarian cancer is the fourth leading cause of mortality by cancer in women. BRCA1 and BRCA2 are major cancer predisposition genes, responsible for a large percentage of hereditary breast and ovarian cancer (HBOC) families. We investigated 17 patients from unrelated HBOC families in north-eastern Romania, screening for mutations in BRCA1 and BRCA2 by mutation-specific PCR and by dideoxy sequencing. We identified four BRCA1 and two BRCA2 mutations in the 17 families. The overall mutation frequency was 41% (7/17; 5 BRCA1 and 2 BRCA2). Two mutations (BRCA1 c.2241dupC and BRCA2 c.8680C>T) were novel and not listed in the BIC database. Two recurrent BRCA1 mutations (c.5266dupC and c.181T>G), previously described among Ashkenazi Jewish and Eastern European populations, were also found. Two unclassified variants (UV) were found, one of which was novel (BRCA2 c.4589A>G). Medical follow-up for mutation carriers was implemented. Our study is the first molecular investigation of the role of the BRCA genes in breast and ovarian cancer in Romania.
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Khan A, Haffty BG. Breast-Conserving Therapy in Women with BRCA1/BRCA2-Associated Breast Cancer. Curr Breast Cancer Rep 2010; 2:90-95. [DOI: 10.1007/s12609-010-0010-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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32
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Kwong A, Ng EK, Law FB, Wong LP, To MY, Cheung MT, Wong HN, Chan VW, Kurian A, West DW, Ford JM, Ma ES. High-resolution melting analysis for rapid screening of BRCA2 founder mutations in Southern Chinese breast cancer patients. Breast Cancer Res Treat 2010; 122:605-7. [PMID: 20396944 DOI: 10.1007/s10549-010-0882-3] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2010] [Accepted: 03/30/2010] [Indexed: 10/19/2022]
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Ruddy K, Gelber S, Shin J, Garber J, Rosenberg R, Przypysny M, Partridge A. Genetic testing in young women with breast cancer: results from a Web-based survey. Ann Oncol 2010; 21:741-747. [DOI: 10.1093/annonc/mdp355] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023] Open
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34
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Evans DG, Moran A, Hartley R, Dawson J, Bulman B, Knox F, Howell A, Lalloo F. Long-term outcomes of breast cancer in women aged 30 years or younger, based on family history, pathology and BRCA1/BRCA2/TP53 status. Br J Cancer 2010; 102:1091-8. [PMID: 20234365 DOI: 10.1038/sj.bjc.6605606] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Background: There are relatively few articles addressing long-term follow-up in women with breast cancer at very young ages. Methods: We have updated and extended our population-based analysis of breast cancer diagnosed at the age ⩽30 years in North-west England to include an extra 15 patients with mutation testing in BRCA1, BRCA2 and TP53, with 115 of 288 consecutive cases being tested. Kaplan–Meier curves were generated to assess overall survival, contralateral breast cancer and other second primaries. Results: Survival analysis of all 288 patients showed poor overall survival, although this improved from a 15-year survival of only 46% in those diagnosed between 1980 and 1989 to 58% in those diagnosed between 1990 and 1997 (P=0.05). Contralateral breast cancer rates were at a steady rate of 0.6 per 1000, although the rates in mutation carriers were ∼2 per 1000. Altogether, 16 BRCA1, 9 BRCA2 and 6 TP53 mutations have now been found among the 115 cases on whom DNA analysis has been performed. BRCAPRO accurately predicted the number of carriers for BRCA1 and BRCA2 and was sensitive and specific at the 10 and 20% threshold, respectively. However, BRCAPRO did not seem to give any weight to DCIS, which accounted for two BRCA1 carriers and three TP53 carriers and overpredicted mutations at the high end of the spectrum, with only 6 of 11 (54%) with a >90% probability having identifiable BRCA1/2 mutations. Interpretation: Rates of new primaries are predicted to some extent by mutation status. BRCAPRO is useful at determining those patients aged ⩽30 years to be tested.
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Yoshida T, Takei H, Kurosumi M, Ninomiya J, Ishikawa Y, Hayashi Y, Tozuka K, Oba H, Kawanowa K, Inoue K, Tabei T. True Recurrences and New Primary Tumors Have Different Clinical Features in Invasive Breast Cancer Patients with Ipsilateral Breast Tumor Relapse After Breast-Conserving Treatment. Breast J 2010; 16:127-33. [DOI: 10.1111/j.1524-4741.2009.00884.x] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Abstract
Cancers of the reproductive organs (i.e., ovaries, uterus and testes), like other cancers, occur as a result of a multi-stage interaction of genetic and environmental factors. A small proportion of cancers of the reproductive organs occur as part of a recognised cancer syndrome, as a result of inheritance of mutations in highly penetrant cancer susceptibility genes (e.g., BRCA1, BRCA2, MLH1 or MSH2). Recognition of individuals and families with inherited cancer predisposition syndromes and individuals at high risk due to familial cancer clustering is fundamentally important for the management and treatment of the current cancer and for future prevention of further cancers for the individual and their extended family.
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Hiripi E, Lorenzo Bermejo J, Li X, Sundquist J, Hemminki K. Familial association of pancreatic cancer with other malignancies in Swedish families. Br J Cancer 2009; 101:1792-7. [PMID: 19826425 PMCID: PMC2778532 DOI: 10.1038/sj.bjc.6605363] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023] Open
Abstract
Background: The aim of this study was to characterise the familial association of pancreatic cancer with other malignancies. Methods: Relative risks (RRs) of pancreatic cancer according to family history of cancer were calculated using the updated Swedish Family-Cancer Database, which includes over 11.5 million individuals. Estimates were based on Poisson regression. RRs of tumours for individuals with a parental history of pancreatic cancer were also estimated. Results: The risk of pancreatic cancer was elevated in individuals with a parental history of cancers of the liver (RR 1.41; 95% CI 1.10–1.81), kidney (RR 1.37; 95% CI 1.06–1.76), lung (RR 1.50; 95% CI 1.27–1.79) and larynx (RR 1.98; 95% CI 1.19–3.28). Associations were also found between parental history of pancreatic cancer and cancers of the small intestine, colon, breast, lung, testis and cervix in offspring. There was an increased risk of pancreatic cancer associated with early-onset breast cancer in siblings. Conclusion: Pancreatic cancer aggregates in families with several types of cancer. Smoking may contribute to the familial aggregation of pancreatic and lung tumours, and the familial clustering of pancreatic and breast cancer could be partially explained by inherited mutations in the BRCA2 gene.
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Affiliation(s)
- E Hiripi
- Division of Molecular Genetic Epidemiology, German Cancer Research Center (DKFZ) Im Neuenheimer Feld 580, 69120, Germany.
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38
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Zhang J, Song YH, Brannigan BW, Wahrer DCR, Schiripo TA, Harris PL, Haserlat SM, Ulkus LE, Shannon KM, Garber JE, Freedman ML, Henderson BE, Zou L, Sgroi DC, Haber DA, Bell DW. Prevalence and functional analysis of sequence variants in the ATR checkpoint mediator Claspin. Mol Cancer Res 2009; 7:1510-6. [PMID: 19737971 DOI: 10.1158/1541-7786.mcr-09-0033] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Mutational inactivation of genes controlling the DNA-damage response contributes to cancer susceptibility within families and within the general population as well as to sporadic tumorigenesis. Claspin (CLSPN) encodes a recently recognized mediator protein essential for the ATR and CHK1-dependent checkpoint elicited by replicative stress or the presence of ssDNA. Here, we describe a study to determine whether mutational disruption of CLSPN contributes to cancer susceptibility and sporadic tumorigenesis. We resequenced CLSPN from the germline of selected cancer families with a history of breast cancer (n = 25) or a multicancer phenotype (n = 46) as well as from a panel of sporadic cancer cell lines (n = 52) derived from a variety of tumor types. Eight nonsynonymous variants, including a recurrent mutation, were identified from the germline of two cancer-prone individuals and five cancer cell lines of breast, ovarian, and hematopoietic origin. None of the variants was present within population controls. In contrast, mutations were rare within genes encoding the CLSPN-interacting protein ATR and its binding partner ATRIP. One variant of CLSPN, encoding the I783S missense mutation, was defective in its ability to mediate CHK1 phosphorylation following DNA damage and was unable to rescue sensitivity to replicative stress in CLSPN-depleted cells. Taken together, these observations raise the possibility that CLSPN may encode a component of the DNA-damage response pathway that is targeted by mutations in human cancers, suggesting the need for larger population-based studies to investigate whether CLSPN variants contribute to cancer susceptibility.
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Affiliation(s)
- Jianmin Zhang
- Massachusetts General Hospital Cancer Center and Harvard Medical School, Charlestown, Massachusetts 02129, USA
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39
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Yang XY, Xi MR, Yang KX, Yu H. Prognostic value of estrogen receptor and progesterone receptor status in young Chinese ovarian carcinoma patients. Gynecol Oncol 2009; 113:99-104. [DOI: 10.1016/j.ygyno.2008.12.018] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2008] [Revised: 12/01/2008] [Accepted: 12/04/2008] [Indexed: 10/21/2022]
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40
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Kuo WH, Yen AM, Lee PH, Chen KM, Wang J, Chang KJ, Chen TH, Tsau HS. Cumulative survival in early-onset unilateral and bilateral breast cancer: an analysis of 1907 Taiwanese women. Br J Cancer 2009; 100:563-70. [PMID: 19190627 DOI: 10.1038/sj.bjc.6604898] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022] Open
Abstract
As the epidemiological pattern of breast cancer in modernising Asian countries differs greatly from that in Western countries, it is worthwhile to investigate the long-term prognoses of unilateral and bilateral breast cancer in these nations. A retrospective cohort study composed of 1907 Taiwanese women was conducted to follow 1863 unilateral and 44 bilateral cases of breast cancer. Time-dependent Cox regression was used to assess the risk of breast cancer death by considering the time course of unilateral and bilateral tumour development. The 15-year survival rates were 68.37, 62.63, and 26.42% for unilateral, synchronous bilateral, and metachronous bilateral breast cancer, respectively. Differences among types were most apparent after 5 years of follow-up. After adjusting for significant prognostic factors, the risk of death for overall bilateral breast cancer was 2.50-fold greater (95% CI, 1.43-4.37) compared to unilateral breast cancer. The corresponding figures were 1.12-fold (95% CI, 0.42-3.02) and 6.11-fold (95% CI, 3.14-11.89) for synchronous and metachronous bilateral breast cancer, respectively. Taiwanese women, who are frequently diagnosed with breast cancer before 50 years of age, showed poorer survival for metachronous bilateral than for synchronous bilateral or unilateral breast cancer. Survival was markedly poorer compared to recent data from Sweden.
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41
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Roos JL, Pretorius HW, Karayiorgou M. Clinical Characteristics of an Afrikaner Founder Population Recruited for a Schizophrenia Genetic Study. Ann N Y Acad Sci 2008; 1151:85-101. [DOI: 10.1111/j.1749-6632.2008.03453.x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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42
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Quaresima B, Romeo F, Faniello MC, Di Sanzo M, Liu CG, Lavecchia A, Taccioli C, Gaudio E, Baudi F, Trapasso F, Croce CM, Cuda G, Costanzo F. BRCA1 5083del19 mutant allele selectively up-regulates periostin expression in vitro and in vivo. Clin Cancer Res 2008; 14:6797-803. [PMID: 18980973 DOI: 10.1158/1078-0432.ccr-07-5208] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
PURPOSE The aim of this study was to explore the gene expression pattern produced by the cancer-associated BRCA1 5083del19 founder mutation by using a microarray analysis. Such a mutation, identified in a subset of familial breast cancer patients, involves a deletion at the 3' end of the BRCA1 messenger leading, in the mature protein, to the ablation of the BRCT tandem domain. EXPERIMENTAL DESIGN We generated HeLa cells stably expressing both exogenous wild-type (HeLa/(wt)BRCA1), used as a control, and 5083del19 BRCA1 (HeLa/(5083del19)BRCA1) alleles; gene chips were then used to investigate any changes in the transcription profile induced by the 5083del19 BRCA1 mutant compared with controls. RESULTS Among the genes showing perturbation of their expression, periostin was found to be up-regulated in HeLa/(5083del19)BRCA1 cells to an extent of 72-fold versus HeLa/(pcDNA3.1/empty) and 76-fold versus HeLa/(wt)BRCA1 cells. This finding was validated both in vitro in breast cancer cell lines harboring mutations of BRCA1 and in vivo by immunohistochemistry of breast cancer specimens bearing the 5083del19 BRCA1 mutation as well as by Western blot analysis of sera obtained from patients and healthy carriers of the same mutation. CONCLUSIONS Our results suggest that periostin overexpression, whose product is released from cells in the extracellular fluids, might be a potential marker for early cancer detection in a specific subset of hereditary breast carcinomas triggered by cancer-associated BRCA1 mutations that affect the BRCT tandem domain.
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Affiliation(s)
- Barbara Quaresima
- Department of Experimental and Clinical Medicine, Magna Graecia University of Catanzaro, Catanzaro, Italy
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Chabalier-Taste C, Racca C, Dozier C, Larminat F. BRCA1 is regulated by Chk2 in response to spindle damage. Biochimica et Biophysica Acta (BBA) - Molecular Cell Research 2008; 1783:2223-33. [DOI: 10.1016/j.bbamcr.2008.08.006] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/15/2007] [Revised: 07/10/2008] [Accepted: 08/10/2008] [Indexed: 01/14/2023]
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Chen W, Pan K, Ouyang T, Li J, Wang T, Fan Z, Fan T, Lin B, Lu Y, You W, Xie Y. BRCA1 germline mutations and tumor characteristics in Chinese women with familial or early-onset breast cancer. Breast Cancer Res Treat 2009; 117:55-60. [DOI: 10.1007/s10549-008-0066-6] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2008] [Accepted: 05/14/2008] [Indexed: 11/27/2022]
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Toh GT, Kang P, Lee SSW, Lee DSC, Lee SY, Selamat S, Mohd Taib NA, Yoon SY, Yip CH, Teo SH. BRCA1 and BRCA2 germline mutations in Malaysian women with early-onset breast cancer without a family history. PLoS One 2008; 3:e2024. [PMID: 18431501 PMCID: PMC2295262 DOI: 10.1371/journal.pone.0002024] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2007] [Accepted: 03/07/2008] [Indexed: 01/07/2023] Open
Abstract
Background In Asia, breast cancer is characterised by an early age of onset: In Malaysia, approximately 50% of cases occur in women under the age of 50 years. A proportion of these cases may be attributable, at least in part, to genetic components, but to date, the contribution of genetic components to breast cancer in many of Malaysia's ethnic groups has not been well-characterised. Methodology Given that hereditary breast carcinoma is primarily due to germline mutations in one of two breast cancer susceptibility genes, BRCA1 and BRCA2, we have characterised the spectrum of BRCA mutations in a cohort of 37 individuals with early-onset disease (≤40 years) and no reported family history. Mutational analysis of BRCA1 and BRCA2 was conducted by full sequencing of all exons and intron-exon junctions. Conclusions Here, we report a total of 14 BRCA1 and 17 BRCA2 sequence alterations, of which eight are novel (3 BRCA1 and 5 BRCA2). One deleterious BRCA1 mutation and 2 deleterious BRCA2 mutations, all of which are novel mutations, were identified in 3 of 37 individuals. This represents a prevalence of 2.7% and 5.4% respectively, which is consistent with other studies in other Asian ethnic groups (4–9%).
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Affiliation(s)
- Gaik Theng Toh
- Cancer Research Initiatives Foundation (CARIF), Outpatient Centre, Subang Jaya Medical Centre, Selangor, Malaysia
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Robles O, Blaxton T, Adami H, Arango C, Thaker G, Gold J. Nonverbal delayed recognition in the relatives of schizophrenia patients with or without schizophrenia spectrum. Biol Psychiatry 2008; 63:498-504. [PMID: 17916332 PMCID: PMC2701547 DOI: 10.1016/j.biopsych.2007.05.016] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/03/2006] [Revised: 05/14/2007] [Accepted: 05/14/2007] [Indexed: 11/25/2022]
Abstract
BACKGROUND There is increased interest in the study of cognitive deficits as possible endophenotypic markers for schizophrenia. The main goal of this study was to determine how familiality and schizophrenia spectrum personality symptomatology are related to performance of auditory and visuospatial delayed recognition memory tasks. METHODS The study sample consisted of 162 subjects divided into five groups. The groups included 39 patients with a DSM-IV diagnosis of schizophrenia or schizophreniform disorder; first-degree relatives of schizophrenia patients, 22 with and 31 without schizophrenia spectrum personality traits; and healthy control subjects with no family history of psychosis, 22 with and 48 without schizophrenia spectrum traits. Auditory and visuospatial delayed recognition memory performance was assessed. RESULTS Significant differences were observed between patients and healthy control subjects in both auditory [F(1,79) = 7.358 p = .008] and visual [F(1,47) = 34.67, p < .001] delayed recognition tasks. When comparing the four non-patient groups, auditory and visuospatial discriminability decreased as a function of familiality of schizophrenia (p < .05). Deficits were more pronounced in relatives with schizophrenia spectrum traits [auditory d = .7114; visual d = 1.0199]. CONCLUSIONS A biological relationship to schizophrenia increases the likelihood of impaired delayed recognition memory. Likewise, poorer performance is associated with schizophrenia spectrum phenotype only when combined with familiality.
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Affiliation(s)
- Olalla Robles
- Hospital General Universitario Gregorio Marañón, Departamento de Psiquiatría, Madrid, Spain.
| | - Teresa Blaxton
- MPRC, University of Maryland, School of Medicine, Baltimore, MD
| | - Helene Adami
- MPRC, University of Maryland, School of Medicine, Baltimore, MD
| | - Celso Arango
- Hospital General Universitario Gregorio Marañón, Departamento de Psiquiatría, Madrid, Spain
| | - Gunvant Thaker
- MPRC, University of Maryland, School of Medicine, Baltimore, MD
| | - James Gold
- MPRC, University of Maryland, School of Medicine, Baltimore, MD
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Abstract
BACKGROUND In general, Korean women with breast cancer are younger than white women. We have compared the clinicopathologic characteristics and prognosis in very young and less young premenopausal Korean women with breast cancer. METHODS Of the breast cancer patients treated at the Asan Medical Center in Seoul, Korea, from 1989 to 2002, 381 (9.6%) were younger than 35 years of age (the "very young" group) and 2320 were 35 to 50 years of age (the "less young" group). We retrospectively compared the clinicopathologic factors and survival rates of these two groups. RESULTS The very young group with lymph node metastases had poorer 5-year survival (69.9% vs. 82.7%, P = .0063) and disease-free survival (58.1% vs. 74.1%, P < .0001) rates than their older counterparts. In addition, the very young group had more advanced-stage disease (P = .001), higher T stage (P = .001), and more positive lymph nodes (P = .024) than did their older counterparts, as well as higher percentages of estrogen receptor-negative disease (48.2% vs. 42.1%, P = .047), progesterone receptor-negative disease (53.5% vs. 44.1%, P = .002), and grade 3 histology (52.1% vs. 43.5%, P = .011) tumors. CONCLUSIONS Compared with older premenopausal Korean women with breast cancer, those younger than 35 years old had a poorer prognosis as a result of a higher rate of recurrence, a later stage at diagnosis, and more aggressive disease. Thus, in Korean breast cancer patients, age younger than 35 years was an independent predictor of recurrence.
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Affiliation(s)
- Jeong Kyeung Kim
- Department of Surgery, University of Ulsan, College of Medicine, Asan Medical Center, Seoul, 138-040, Korea
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Affiliation(s)
- Boris Pasche
- Department of Medicine, Robert H. Lurie Comprehensive Cancer Center, Northwestern University Cancer Genetics Program, Chicago, IL 60611, USA
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Bell DW, Kim SH, Godwin AK, Schiripo TA, Harris PL, Haserlat SM, Wahrer DCR, Haiman CA, Daly MB, Niendorf KB, Smith MR, Sgroi DC, Garber JE, Olopade OI, Le Marchand L, Henderson BE, Altshuler D, Haber DA, Freedman ML. Genetic and functional analysis of CHEK2 (CHK2) variants in multiethnic cohorts. Int J Cancer 2007; 121:2661-7. [PMID: 17721994 PMCID: PMC3090684 DOI: 10.1002/ijc.23026] [Citation(s) in RCA: 64] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
The CHEK2-1100delC mutation is recurrent in the population and is a moderate risk factor for breast cancer. To identify additional CHEK2 mutations potentially contributing to breast cancer susceptibility, we sequenced 248 cases with early-onset disease; functionally characterized new variants and conducted a population-based case-control analysis to evaluate their contribution to breast cancer risk. We identified 1 additional null mutation and 5 missense variants in the germline of cancer patients. In vitro, the CHEK2-H143Y variant resulted in gross protein destabilization, while others had variable suppression of in vitro kinase activity using BRCA1 as a substrate. The germline CHEK2-1100delC mutation was present among 8/1,646 (0.5%) sporadic, 2/400 (0.5%) early-onset and 3/302 (1%) familial breast cancer cases, but undetectable amongst 2,105 multiethnic controls, including 633 from the US. CHEK2-positive breast cancer families also carried a deleterious BRCA1 mutation. 1100delC appears to be the only recurrent CHEK2 mutation associated with a potentially significant contribution to breast cancer risk in the general population. Another recurrent mutation with attenuated in vitro function, CHEK2-P85L, is not associated with increased breast cancer susceptibility, but exhibits a striking difference in frequency across populations with different ancestral histories. These observations illustrate the importance of genotyping ethnically diverse groups when assessing the impact of low-penetrance susceptibility alleles on population risk. Our findings highlight the notion that clinical testing for rare missense mutations within CHEK2 may have limited value in predicting breast cancer risk, but that testing for the 1100delC variant may be valuable in phenotypically- and geographically-selected populations.
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Affiliation(s)
- Daphne W Bell
- Massachusetts General Hospital Cancer Center, Charlestown, MA, USA.
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Apicella C, Dowty JG, Dite GS, Jenkins MA, Senie RT, Daly MB, Andrulis IL, John EM, Buys SS, Li FP, Glendon G, Chung W, Ozcelik H, Miron A, Kotar K, Southey MC, Foulkes WD, Hopper JL. Validation study of the LAMBDA model for predicting the BRCA1 or BRCA2 mutation carrier status of North American Ashkenazi Jewish women. Clin Genet 2007; 72:87-97. [PMID: 17661812 DOI: 10.1111/j.1399-0004.2007.00841.x] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
LAMBDA is a model that estimates the probability an Ashkenazi Jewish (AJ) woman carries an ancestral BRCA1 or BRCA2 mutation from her personal and family cancer history. LAMBDA is relevant to clinical practice, and its implementation does not require a computer. It was developed principally from Australian and UK data. We conducted a validation study using 1286 North American AJ women tested for the mutations 185delAG and 5382insC in BRCA1 and 6174delT in BRCA2. Most had a personal or family history of breast cancer. We observed 197 carriers. The area under the receiver operator characteristic (ROC) curve (a measure of ranking) was 0.79 [95% confidence interval (CI) = 0.77-0.81], similar to that for the model-generating data (0.78; 95% CI = 0.75-0.82). LAMBDA predicted 232 carriers (18% more than observed; p = 0.002) and was overdispersed (p = 0.009). The Bayesian computer program BRCAPRO gave a similar area under the ROC curve (0.78; 95% CI = 0.76-0.80), but predicted 367 carriers (86% more than observed; p < 0.0001), and was substantially overdispersed (p < 0.0001). Therefore, LAMBDA is comparable to BRCAPRO for ranking AJ women according to their probability of being a BRCA1 or BRCA2 mutation carrier and is more accurate than brcapro which substantially overpredicts carriers in this population.
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Affiliation(s)
- C Apicella
- Centre for Molecular, Environmental, Analytic and Genetic Epidemiology, The University of Melbourne, Victoria, Australia
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