Additive interactions between susceptibility single-nucleotide polymorphisms identified in genome-wide association studies and breast cancer risk factors in the breast and prostate cancer cohort consortium

Amit D. Joshi, Sara Lindström, Anika Hüsing, Myrto Barrdahl, Tyler J. Van Der Weele, Daniele Campa, Federico Canzian, Mia M. Gaudet, Jonine D. Figueroa, Laura Baglietto, Christine D. Berg, Julie E. Buring, Stephen J. Chanock, María Dolores Chirlaque, W. Ryan Diver, Laure Dossus, Graham G. Giles, Christopher A. Haiman, Susan E. Hankinson, Brian E. HendersonRobert N. Hoover, David J. Hunter, Claudine Isaacs, Rudolf Kaaks, Laurence N. Kolonel, Vittorio Krogh, Loic Le Marchand, I. Min Lee, Eiliv Lund, Catherine A. McCarty, Kim Overvad, Petra H. Peeters, Elio Riboli, Fredrick Schumacher, Gianluca Severi, Daniel O. Stram, Malin Sund, Michael J. Thun, Ruth C. Travis, Dimitrios Trichopoulos, Walter C. Willett, Shumin Zhang, Regina G. Ziegler, Peter Kraft

Research output: Contribution to journalArticlepeer-review

28 Scopus citations

Abstract

Additive interactions can have public health and etiological implications but are infrequently reported. We assessed departures from additivity on the absolute risk scale between 9 established breast cancer risk factors and 23 susceptibility single-nucleotide polymorphisms (SNPs) identified from genome-wide association studies among 10,146 non-Hispanic white breast cancer cases and 12,760 controls within the National Cancer Institute's Breast and Prostate Cancer Cohort Consortium. We estimated the relative excess risk due to interaction and its 95% confidence interval for each pairwise combination of SNPs and nongenetic risk factors using age-and cohort-adjusted logistic regression models. After correction for multiple comparisons, we identified a statistically significant relative excess risk due to interaction (uncorrected P = 4.51 × 10-5) between a SNP in the DNA repair protein RAD51 homolog 2 gene (RAD51L1; rs10483813) and body mass index (weight (kg)/height (m)2). We also compared additive and multiplicative polygenic risk prediction models using per-allele odds ratio estimates from previous studies for breast-cancer susceptibility SNPs and observed that the multiplicative model had a substantially better goodness of fit than the additive model.

Original languageEnglish (US)
Pages (from-to)1018-1027
Number of pages10
JournalAmerican journal of epidemiology
Volume180
Issue number10
DOIs
StatePublished - Sep 12 2014

Bibliographical note

Publisher Copyright:
© 2014 The Author.

Keywords

  • Additive interactions
  • Breast cancer
  • Genome-wide association studies
  • Single-nucleotide polymorphisms

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