No evidence that protein truncating variants in BRIP1 are associated with breast cancer risk: implications for gene panel testing
- PMID: 26921362
- PMCID: PMC4938802
- DOI: 10.1136/jmedgenet-2015-103529
No evidence that protein truncating variants in BRIP1 are associated with breast cancer risk: implications for gene panel testing
Abstract
Background: BRCA1 interacting protein C-terminal helicase 1 (BRIP1) is one of the Fanconi Anaemia Complementation (FANC) group family of DNA repair proteins. Biallelic mutations in BRIP1 are responsible for FANC group J, and previous studies have also suggested that rare protein truncating variants in BRIP1 are associated with an increased risk of breast cancer. These studies have led to inclusion of BRIP1 on targeted sequencing panels for breast cancer risk prediction.
Methods: We evaluated a truncating variant, p.Arg798Ter (rs137852986), and 10 missense variants of BRIP1, in 48 144 cases and 43 607 controls of European origin, drawn from 41 studies participating in the Breast Cancer Association Consortium (BCAC). Additionally, we sequenced the coding regions of BRIP1 in 13 213 cases and 5242 controls from the UK, 1313 cases and 1123 controls from three population-based studies as part of the Breast Cancer Family Registry, and 1853 familial cases and 2001 controls from Australia.
Results: The rare truncating allele of rs137852986 was observed in 23 cases and 18 controls in Europeans in BCAC (OR 1.09, 95% CI 0.58 to 2.03, p=0.79). Truncating variants were found in the sequencing studies in 34 cases (0.21%) and 19 controls (0.23%) (combined OR 0.90, 95% CI 0.48 to 1.70, p=0.75).
Conclusions: These results suggest that truncating variants in BRIP1, and in particular p.Arg798Ter, are not associated with a substantial increase in breast cancer risk. Such observations have important implications for the reporting of results from breast cancer screening panels.
Keywords: Cancer: breast.
Published by the BMJ Publishing Group Limited. For permission to use (where not already granted under a licence) please go to http://www.bmj.com/company/products-services/rights-and-licensing/
Conflict of interest statement
GM reports grants from Cancer Australia during the conduct of the study; personal fees from AstraZeneca outside the submitted work. AS reports grants from Breast Cancer Now (previously Breakthrough Breast Cancer) during the conduct of the study. SVT reports grants from US National Cancer Institute during the conduct of the study and is an inventor on most of the key BRCA1 and BRCA2 patents. The claims in these patents that constrained commercial genetic testing by entities other than Myriad Genetics have been overturned, expired or abandoned. MWB reports grants from ELAN Found during the conduct of the study. DEG has US Patent nos. 5747282; 5710001; 5837942; 6033857 with royalties paid by Myriad Genetics. CV reports grants from NCI during the conduct of the study. PAF reports grants and/or personal fees from Amgen, Novartis, Biomarin, Roche, Pfizer, GSK, TEVA and Genomic Health, outside the submitted work. RNL reports grants from Medical Research Council and Cancer Research UK during the conduct of the study.
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Comment in
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Risky business: getting a grip on BRIP.J Med Genet. 2016 May;53(5):296-7. doi: 10.1136/jmedgenet-2015-103648. Epub 2016 Feb 26. J Med Genet. 2016. PMID: 26921361 No abstract available.
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