Risks of breast and ovarian cancer for women harboring pathogenic missense variants in BRCA1 and BRCA2 compared with those harboring protein truncating variants
- PMID: 34906479
- PMCID: PMC10170303
- DOI: 10.1016/j.gim.2021.08.016
Risks of breast and ovarian cancer for women harboring pathogenic missense variants in BRCA1 and BRCA2 compared with those harboring protein truncating variants
Erratum in
-
Risks of breast and ovarian cancer for women harboring pathogenic missense variants in BRCA1 and BRCA2 compared with those harboring protein truncating variants.Genet Med. 2022 Oct;24(10):2208. doi: 10.1016/j.gim.2022.08.005. Genet Med. 2022. PMID: 36205748 No abstract available.
Abstract
Purpose: Germline genetic testing for BRCA1 and BRCA2 variants has been a part of clinical practice for >2 decades. However, no studies have compared the cancer risks associated with missense pathogenic variants (PVs) with those associated with protein truncating (PTC) variants.
Methods: We collected 582 informative pedigrees segregating 1 of 28 missense PVs in BRCA1 and 153 pedigrees segregating 1 of 12 missense PVs in BRCA2. We analyzed 324 pedigrees with PTC variants in BRCA1 and 214 pedigrees with PTC variants in BRCA2. Cancer risks were estimated using modified segregation analysis.
Results: Estimated breast cancer risks were markedly lower for women aged >50 years carrying BRCA1 missense PVs than for the women carrying BRCA1 PTC variants (hazard ratio [HR] = 3.9 [2.4-6.2] for PVs vs 12.8 [5.7-28.7] for PTC variants; P = .01), particularly for missense PVs in the BRCA1 C-terminal domain (HR = 2.8 [1.4-5.6]; P = .005). In case of BRCA2, for women aged >50 years, the HR was 3.9 (2.0-7.2) for those heterozygous for missense PVs compared with 7.0 (3.3-14.7) for those harboring PTC variants. BRCA1 p.[Cys64Arg] and BRCA2 p.[Trp2626Cys] were associated with particularly low risks of breast cancer compared with other PVs.
Conclusion: These results have important implications for the counseling of at-risk women who harbor missense PVs in the BRCA1/2 genes.
Keywords: BRCA1; BRCA2; Cancer risks; Missense variants.
Copyright © 2021 American College of Medical Genetics and Genomics. Published by Elsevier Inc. All rights reserved.
Conflict of interest statement
Conflict of Interest F.J.C. has received consulting fees from Astrazeneca. A.S. has received consulting fees from Pfizer and Astra Zeneca. T.V.O.H. has received honoraria from Pfizer. All other authors declare no conflicts of interest.
References
-
- Antoniou AC, Pharoah PD, Narod S, et al. Average risks of breast and ovarian cancer associated with BRCA1 or BRCA2 mutations detected in case series unselected for family history: a combined analysis of 22 studies. Am J Hum Genet. 2003;72(5):1117–1130. Published correction appears in Am J Hum Genet. 2003;73(3):709. 10.1086/375033. - DOI - PMC - PubMed
-
- Thompson D, Easton D, Breast Cancer Linkage Consortium. Variation in BRCA1 cancer risks by mutation position. Cancer Epidemiol Biomarkers Prev. 2002;11(4):329–336. - PubMed
Publication types
MeSH terms
Substances
Grants and funding
LinkOut - more resources
Full Text Sources
Medical
Research Materials
Miscellaneous
