Abstract
Despite extensive analysis of the BRCA1 and BRCA2 genes, germline mutations are detected in <20% of families with a presumed genetic predisposition for breast and ovarian cancer. Recent literature reported RAD51C as a new breast cancer susceptibility gene. In this study, we report the analysis of 410 patients from 351 unrelated pedigrees. All were referred for genetic testing and we selected families with at least one reported case of ovarian cancer in which BRCA1&2 mutations were previously ruled out. We analyzed the coding exons, intron–exons boundaries, and UTRs of RAD51C. Our mutation analysis did not reveal any unequivocal deleterious mutation. In total 12 unique sequence variations were identified of which two were novel. Our study and others suggest a low prevalence of RAD51C mutations with an exception for some founder populations. This observation is in favor of the rare allele hypothesis in the debate over the nature of the genetic contribution to individual susceptibility to breast and ovarian cancer and further genome-wide studies in high risk families are warranted.
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Acknowledgments
This research was supported by grant G.A044.10 from the Fund for Scientific Research Flanders (FWO), by GOA grant BOF10/GOA/019 (Ghent University). “Emmanuel van der Schueren” grant from the “Vlaamse Liga tegen Kanker” and by the Quebec Ministry of Economic Development, Innovation and Export Trade (MDEIE). Furthermore, the authors would like to thank Yvonne Detisch for her help with collecting the clinical information of the families of Maastricht.
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De Leeneer, K., Van Bockstal, M., De Brouwer, S. et al. Evaluation of RAD51C as cancer susceptibility gene in a large breast-ovarian cancer patient population referred for genetic testing. Breast Cancer Res Treat 133, 393–398 (2012). https://doi.org/10.1007/s10549-012-1998-4
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DOI: https://doi.org/10.1007/s10549-012-1998-4