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Published in: Breast Cancer Research and Treatment 3/2019

Open Access 01-12-2019 | Breast Cancer | Epidemiology

Inherited variants in XRCC2 and the risk of breast cancer

Authors: Wojciech Kluźniak, Dominika Wokołorczyk, Bogna Rusak, Tomasz Huzarski, Jacek Gronwald, Klaudia Stempa, Helena Rudnicka, Aniruddh Kashyap, Tadeusz Dębniak, Anna Jakubowska, Marcin Lener, Marek Szwiec, Joanna Tomiczek-Szwiec, Joanna Jarkiewicz-Tretyn, Magdalena Cechowska, Paweł Domagała, Agata Szymiczek, Maryam Bagherzadeh, Jan Lubiński, Steven A. Narod, Mohammad R. Akbari, Cezary Cybulski, the Polish Hereditary Breast Cancer Consortium

Published in: Breast Cancer Research and Treatment | Issue 3/2019

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Abstract

Background

XRCC2 participates in homologous recombination and in DNA repair. XRCC2 has been reported to be a breast cancer susceptibility gene and is now included in several breast cancer susceptibility gene panels.

Methods

We sequenced XRCC2 in 617 Polish women with familial breast cancer and found a founder mutation. We then genotyped 12,617 women with breast cancer and 4599 controls for the XRCC2 founder mutation.

Results

We identified a recurrent truncating mutation of XRCC2 (c.96delT, p.Phe32fs) in 3 of 617 patients with familial breast cancer who were sequenced. The c.96delT mutation was then detected in 29 of 12,617 unselected breast cancer cases (0.23%) compared to 11 of 4599 cancer-free women (0.24%) (OR = 0.96; 95% CI 0.48–1.93). The mutation frequency in 1988 women with familial breast cancer was 0.2% (OR = 0.84, 95% CI 0.27–2.65). Breast cancers in XRCC2 mutation carriers and non-carriers were similar with respect to age of diagnosis and clinical characteristics. Loss of the wild-type XRCC2 allele was observed only in one of the eight breast cancers from patients who carried the XRCC2 mutation. No cancer type was more common in first- or second-degree relatives of XRCC2 mutation carriers than in relatives of the non-carriers.

Conclusion

XRCC2 c.96delT is a protein-truncating founder variant in Poland. There is no evidence that this mutation predisposes to breast cancer (and other cancers). It is premature to consider XRCC2 as a breast cancer-predisposing gene.
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Metadata
Title
Inherited variants in XRCC2 and the risk of breast cancer
Authors
Wojciech Kluźniak
Dominika Wokołorczyk
Bogna Rusak
Tomasz Huzarski
Jacek Gronwald
Klaudia Stempa
Helena Rudnicka
Aniruddh Kashyap
Tadeusz Dębniak
Anna Jakubowska
Marcin Lener
Marek Szwiec
Joanna Tomiczek-Szwiec
Joanna Jarkiewicz-Tretyn
Magdalena Cechowska
Paweł Domagała
Agata Szymiczek
Maryam Bagherzadeh
Jan Lubiński
Steven A. Narod
Mohammad R. Akbari
Cezary Cybulski
the Polish Hereditary Breast Cancer Consortium
Publication date
01-12-2019
Publisher
Springer US
Published in
Breast Cancer Research and Treatment / Issue 3/2019
Print ISSN: 0167-6806
Electronic ISSN: 1573-7217
DOI
https://doi.org/10.1007/s10549-019-05415-5

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