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Copy number variants as modifiers of breast cancer risk for BRCA1/BRCA2 pathogenic variant carriers

Hakkaart, C. ; Ehrencrona, H. LU orcid and Walker, Logan C. (2022) In Communications Biology 5(1).
Abstract
The contribution of germline copy number variants (CNVs) to risk of developing cancer in individuals with pathogenic BRCA1 or BRCA2 variants remains relatively unknown. We conducted the largest genome-wide analysis of CNVs in 15,342 BRCA1 and 10,740 BRCA2 pathogenic variant carriers. We used these results to prioritise a candidate breast cancer risk-modifier gene for laboratory analysis and biological validation. Notably, the HR for deletions in BRCA1 suggested an elevated breast cancer risk estimate (hazard ratio (HR) = 1.21), 95% confidence interval (95% CI = 1.09-1.35) compared with non-CNV pathogenic variants. In contrast, deletions overlapping SULT1A1 suggested a decreased breast cancer risk (HR = 0.73, 95% CI 0.59-0.91) in BRCA1... (More)
The contribution of germline copy number variants (CNVs) to risk of developing cancer in individuals with pathogenic BRCA1 or BRCA2 variants remains relatively unknown. We conducted the largest genome-wide analysis of CNVs in 15,342 BRCA1 and 10,740 BRCA2 pathogenic variant carriers. We used these results to prioritise a candidate breast cancer risk-modifier gene for laboratory analysis and biological validation. Notably, the HR for deletions in BRCA1 suggested an elevated breast cancer risk estimate (hazard ratio (HR) = 1.21), 95% confidence interval (95% CI = 1.09-1.35) compared with non-CNV pathogenic variants. In contrast, deletions overlapping SULT1A1 suggested a decreased breast cancer risk (HR = 0.73, 95% CI 0.59-0.91) in BRCA1 pathogenic variant carriers. Functional analyses of SULT1A1 showed that reduced mRNA expression in pathogenic BRCA1 variant cells was associated with reduced cellular proliferation and reduced DNA damage after treatment with DNA damaging agents. These data provide evidence that deleterious variants in BRCA1 plus SULT1A1 deletions contribute to variable breast cancer risk in BRCA1 carriers. © 2022. The Author(s). (Less)
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keywords
BRCA1 protein, BRCA1 protein, human, BRCA2 protein, BRCA2 protein, human, messenger RNA, breast tumor, copy number variation, female, genetic predisposition, genetics, heterozygote, human, pathology, BRCA1 Protein, BRCA2 Protein, Breast Neoplasms, DNA Copy Number Variations, Female, Genetic Predisposition to Disease, Heterozygote, Humans, RNA, Messenger
in
Communications Biology
volume
5
issue
1
article number
1061
publisher
Nature Publishing Group
external identifiers
  • scopus:85139349547
  • pmid:36203093
ISSN
2399-3642
DOI
10.1038/s42003-022-03978-6
language
English
LU publication?
yes
id
0964c6a6-cdc1-43e9-b451-a6a5cecc9680
date added to LUP
2022-12-20 10:34:35
date last changed
2022-12-22 03:00:20
@article{0964c6a6-cdc1-43e9-b451-a6a5cecc9680,
  abstract     = {{The contribution of germline copy number variants (CNVs) to risk of developing cancer in individuals with pathogenic BRCA1 or BRCA2 variants remains relatively unknown. We conducted the largest genome-wide analysis of CNVs in 15,342 BRCA1 and 10,740 BRCA2 pathogenic variant carriers. We used these results to prioritise a candidate breast cancer risk-modifier gene for laboratory analysis and biological validation. Notably, the HR for deletions in BRCA1 suggested an elevated breast cancer risk estimate (hazard ratio (HR) = 1.21), 95% confidence interval (95% CI = 1.09-1.35) compared with non-CNV pathogenic variants. In contrast, deletions overlapping SULT1A1 suggested a decreased breast cancer risk (HR = 0.73, 95% CI 0.59-0.91) in BRCA1 pathogenic variant carriers. Functional analyses of SULT1A1 showed that reduced mRNA expression in pathogenic BRCA1 variant cells was associated with reduced cellular proliferation and reduced DNA damage after treatment with DNA damaging agents. These data provide evidence that deleterious variants in BRCA1 plus SULT1A1 deletions contribute to variable breast cancer risk in BRCA1 carriers. © 2022. The Author(s).}},
  author       = {{Hakkaart, C. and Ehrencrona, H. and Walker, Logan C.}},
  issn         = {{2399-3642}},
  keywords     = {{BRCA1 protein; BRCA1 protein, human; BRCA2 protein; BRCA2 protein, human; messenger RNA; breast tumor; copy number variation; female; genetic predisposition; genetics; heterozygote; human; pathology; BRCA1 Protein; BRCA2 Protein; Breast Neoplasms; DNA Copy Number Variations; Female; Genetic Predisposition to Disease; Heterozygote; Humans; RNA, Messenger}},
  language     = {{eng}},
  number       = {{1}},
  publisher    = {{Nature Publishing Group}},
  series       = {{Communications Biology}},
  title        = {{Copy number variants as modifiers of breast cancer risk for BRCA1/BRCA2 pathogenic variant carriers}},
  url          = {{http://dx.doi.org/10.1038/s42003-022-03978-6}},
  doi          = {{10.1038/s42003-022-03978-6}},
  volume       = {{5}},
  year         = {{2022}},
}