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Assessment of interactions between 205 breast cancer susceptibility loci and 13 established risk factors in relation to breast cancer risk, in the Breast Cancer Association Consortium.

Accepted version
Peer-reviewed

Type

Article

Change log

Authors

Kapoor, Pooja Middha 
Lindström, Sara 
Behrens, Sabine 
Wang, Xiaoliang 
Michailidou, Kyriaki 

Abstract

BACKGROUND: Previous gene-environment interaction studies of breast cancer risk have provided sparse evidence of interactions. Using the largest available dataset to date, we performed a comprehensive assessment of potential effect modification of 205 common susceptibility variants by 13 established breast cancer risk factors, including replication of previously reported interactions. METHODS: Analyses were performed using 28 176 cases and 32 209 controls genotyped with iCOGS array and 44 109 cases and 48 145 controls genotyped using OncoArray from the Breast Cancer Association Consortium (BCAC). Gene-environment interactions were assessed using unconditional logistic regression and likelihood ratio tests for breast cancer risk overall and by estrogen-receptor (ER) status. Bayesian false discovery probability was used to assess the noteworthiness of the meta-analysed array-specific interactions. RESULTS: Noteworthy evidence of interaction at ≤1% prior probability was observed for three single nucleotide polymorphism (SNP)-risk factor pairs. SNP rs4442975 was associated with a greater reduction of risk of ER-positive breast cancer [odds ratio (OR)int = 0.85 (0.78-0.93), Pint = 2.8 x 10-4] and overall breast cancer [ORint = 0.85 (0.78-0.92), Pint = 7.4 x 10-5) in current users of estrogen-progesterone therapy compared with non-users. This finding was supported by replication using OncoArray data of the previously reported interaction between rs13387042 (r2 = 0.93 with rs4442975) and current estrogen-progesterone therapy for overall disease (Pint = 0.004). The two other interactions suggested stronger associations between SNP rs6596100 and ER-negative breast cancer with increasing parity and younger age at first birth. CONCLUSIONS: Overall, our study does not suggest strong effect modification of common breast cancer susceptibility variants by established risk factors.

Description

Keywords

Europeans, Gene-environment interaction, breast cancer, epidemiology, risk factors, single nucleotide polymorphism, Alleles, Breast Neoplasms, Case-Control Studies, Europe, Factor XIII, Female, Gene-Environment Interaction, Genetic Predisposition to Disease, Genome-Wide Association Study, Genotype, Humans, Polymorphism, Single Nucleotide, Receptors, Estrogen, Risk Factors, White People

Journal Title

Int J Epidemiol

Conference Name

Journal ISSN

0300-5771
1464-3685

Volume Title

49

Publisher

Oxford University Press (OUP)

Rights

All rights reserved
Sponsorship
Cancer Research UK (16565)
Cancer Research Uk (None)
Cancer Research Uk (None)
Cancer Research Uk (None)
Breast Cancer Now (None)
Cancer Research Uk (None)
Cancer Research Uk (None)
Cancer Research Uk (None)
European Commission (223175)
European Commission Horizon 2020 (H2020) Societal Challenges (634935)
European Commission Horizon 2020 (H2020) Societal Challenges (633784)
European Commission (16563)
Cancer Research UK (16563)
Cancer Research UK (10118)
Medical Research Council (G1000143)
National Cancer Institute (U19CA148537)
National Cancer Institute (R01CA128978)
National Cancer Institute (U19CA148065)
Cancer Research UK (10710)
Cancer Research UK (12014)
Medical Research Council (G0401527)
Medical Research Council (MR/N003284/1)
Medical Research Council (G0401527/1)
Cancer Research Uk (None)
Cancer Research Uk (None)