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Rad50 c.687delT does not contribute significantly to familial breast cancer in a French population

Rad50 c.687delT does not contribute significantly to familial breast cancer in a French population

Cancer Epidemiology Biomarkers and Prevention 18(2): 684-685

Mutations in DNA repair genes are known for their association with hereditary breast cancer. BRCA1 and BRCA2 are the major genes for high-penetrance familial breast and ovarian cancer, whereas mutations in ATM or Chek2 confer more modest cancer risk. Additional genes involved in DNA double-strand break repair have more recently been associated with breast cancer risk: heterozygosity for deleterious mutations in components of the Rad50-Mre11-Nbs1 complex seems to predispose to breast cancer. In particular, the c.687delT mutation in Rad50 conferred an odds ratio of 4.3 for the risk of breast cancer in a study of Finnish breast cancer families. To explore the contribution of this mutation to breast cancer in French families for which no BRCA mutation could be found, we analyzed the relevant exon in 618 familial breast cancer cases and 513 controls with no personal or familial history of breast cancer. Rad50 was analyzed in its entirety for 231 familial cases, with no clearly deleterious mutations detected. These data together suggest that although founder mutations may make Rad50 a significant breast cancer risk factor in certain populations, it is not a factor in others.

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Accession: 055342223

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PMID: 19190165

DOI: 10.1158/1055-9965.epi-08-0971

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