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Genetic Variation at 9p22.2 and Ovarian Cancer Risk for BRCA1 and BRCA2 Mutation Carriers
UCL.
University Cambridge, Department Publ Hlth and Primary Care, Centre Canc Genet Epidemiol, Cambridge, England .
UCL, Department Gynaecol Oncol, UCL EGA Institute Womens Hlth, London, England .
University Cambridge, Strangeways Research Lab, Canc Research United Kingdom Department Oncol, Cambridge, England University Cambridge, Strangeways Research Lab, Department Publ Hlth and Primary Care, Cambridge, England .
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2011 (English)In: JOURNAL OF THE NATIONAL CANCER INSTITUTE, ISSN 0027-8874, Vol. 103, no 2Article in journal (Refereed) Published
Abstract [en]

Background Germline mutations in the BRCA1 and BRCA2 genes are associated with increased risks of breast and ovarian cancers. Although several common variants have been associated with breast cancer susceptibility in mutation carriers, none have been associated with ovarian cancer susceptibility. A genome-wide association study recently identified an association between the rare allele of the single-nucleotide polymorphism (SNP) rs3814113 (ie, the C allele) at 9p22.2 and decreased risk of ovarian cancer for women in the general population. We evaluated the association of this SNP with ovarian cancer risk among BRCA1 or BRCA2 mutation carriers by use of data from the Consortium of Investigators of Modifiers of BRCA1/2. Methods We genotyped rs3814113 in 10 029 BRCA1 mutation carriers and 5837 BRCA2 mutation carriers. Associations with ovarian and breast cancer were assessed with a retrospective likelihood approach. All statistical tests were two-sided. Results The minor allele of rs3814113 was associated with a reduced risk of ovarian cancer among BRCA1 mutation carriers (per-allele hazard ratio of ovarian cancer = 0.78, 95% confidence interval = 0.72 to 0.85; P = 4.8 x 10(-9)) and BRCA2 mutation carriers (hazard ratio of ovarian cancer = 0.78, 95% confidence interval = 0.67 to 0.90; P = 5.5 x 10(-4)). This SNP was not associated with breast cancer risk among either BRCA1 or BRCA2 mutation carriers. BRCA1 mutation carriers with the TT genotype at SNP rs3814113 were predicted to have an ovarian cancer risk to age 80 years of 48%, and those with the CC genotype were predicted to have a risk of 33%. Conclusion Common genetic variation at the 9p22.2 locus was associated with decreased risk of ovarian cancer for carriers of a BRCA1 or BRCA2 mutation.

Place, publisher, year, edition, pages
Oxford University Press , 2011. Vol. 103, no 2
National Category
Engineering and Technology
Identifiers
URN: urn:nbn:se:liu:diva-65561DOI: 10.1093/jnci/djq494ISI: 000286472800008OAI: oai:DiVA.org:liu-65561DiVA: diva2:396791
Available from: 2011-02-11 Created: 2011-02-11 Last updated: 2013-03-28

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Stenmark Askmalm, Marie

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OncologyFaculty of Health SciencesDepartment of Clinical Pathology and Clinical Genetics
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