NDLI: BRCA1/BRCA2 founder mutations and cancer risks: impact in the western Danish population

Content Provider	Springer Nature Link
Author	Nielsen, Henriette Roed Nilbert, Mef Petersen, Janne Ladelund, Steen Thomassen, Mads Pedersen, Inge Søkilde Hansen, Thomas V. O. Skytte, Anne Bine Borg, Åke Therkildsen, Christina
Copyright Year	2016
Abstract	Mutations in the BRCA1 and BRCA2 genes significantly contribute to hereditary breast cancer and ovarian cancer, but the phenotypic effect from different mutations is insufficiently recognized. We used a western Danish clinic-based cohort of 299 BRCA families to study the female cancer risk in mutation carriers and their untested first-degree relatives. Founder mutations were characterized and the risk of cancer was assessed in relation to the specific mutations. In BRCA1, the cumulative cancer risk at age 70 was 35 % for breast cancer and 29 % for ovarian cancer. In BRCA2, the cumulative risk was 44 % for breast cancer and 15 % for ovarian cancer. We identified 47 distinct BRCA1 mutations and 48 distinct mutations in BRCA2. Among these, 8 founder mutations [BRCA1 c.81-?_4986+?del, c.3319G>T (p.Glu1107*), c.3874delT and c.5213G>A (p.Gly1738Glu) and BRCA2 c.6373delA, c.7008−1G>A, c.7617+1G>A and c.8474delC] were found to account for 23 % of the BRCA1 mutations and for 32 % of the BRCA2 mutations. The BRCA1 mutation c.3319G>T was, compared to other BRCA1 mutations, associated with a higher risk for ovarian cancer. In conclusion, founder mutations in BRCA1 and BRCA2 contribute to up to one-third of the families in western Denmark and among these the BRCA1 c.3319G>T mutation is potentially linked to an increased risk of ovarian cancer.
Starting Page	507
Ending Page	512
Page Count	6
File Format	PDF
ISSN	13899600
Journal	Familial Cancer
Volume Number	15
Issue Number	4
e-ISSN	15737292
Language	English
Publisher	Springer Netherlands
Publisher Date	2016-02-01
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Cancer risk Cumulative incidence Founder mutation Hereditary cancer Cancer Research Human Genetics Epidemiology Biomedicine general
Content Type	Text
Resource Type	Article
Subject	Genetics Cancer Research Genetics (clinical) Oncology

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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