Abstract
Purpose
There is still a considerable percentage of hereditary breast and ovarian cancer (HBOC) cases not explained by BRCA1 and BRCA2 genes. In this report, next-generation sequencing (NGS) techniques were applied to identify novel variants and/or genes involved in HBOC susceptibility.
Methods
Using whole exome sequencing, we identified a novel germline mutation in the moderate-risk gene ATM (c.5441delT; p.Leu1814Trpfs*14) in a family negative for mutations in BRCA1/2 (BRCAX). A case-control association study was performed to establish its prevalence in Spanish population, in a series of 1477 BRCAX families and 589 controls further screened, and NGS panels were used for ATM mutational screening in a cohort of 392 HBOC Spanish BRCAX families and 350 patients affected with diseases not related to breast cancer.
Results
Although the interrogated mutation was not prevalent in case-control association study, a comprehensive mutational analysis of the ATM gene revealed 1.78% prevalence of mutations in the ATM gene in HBOC and 1.94% in breast cancer-only BRCAX families in Spanish population, where data about ATM mutations were very limited.
Conclusion
ATM mutation prevalence in Spanish population highlights the importance of considering ATM pathogenic variants linked to breast cancer susceptibility.
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Acknowledgements
We would like to thank all the members of the Human Genotyping Unit (CEGEN), Human Genetics Programme (Spanish National Cancer Centre, CNIO) for their collaboration in this project. WES was funded by the National Centre for Genomic Analysis (CNAG) as part of the Project “300 exomes to elucidate rare diseases”. This study was partially supported by the Spanish Ministry of Economy and Competitiveness (MINECO) SAF2014-57680-R and the Spanish Network on Rare Diseases (CIBERER) by the Health Ministry PI12/00070, FEDER funds and H2020 (BRIDGES Project, Number 634935) and FIS 15/00059. ATT is a recipient of La-Caixa foundation scholarship. LPC was funded by the Torres-Quevedo programme PTQ-12-05350 from the Ministry of Science and Innovation of Spain.
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Tavera-Tapia, A., Pérez-Cabornero, L., Macías, J.A. et al. Almost 2% of Spanish breast cancer families are associated to germline pathogenic mutations in the ATM gene. Breast Cancer Res Treat 161, 597–604 (2017). https://doi.org/10.1007/s10549-016-4058-7
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DOI: https://doi.org/10.1007/s10549-016-4058-7