Height and Breast Cancer Risk: Evidence From Prospective Studies and Mendelian Randomization

Ben Zhang, Xiao-Ou Shu, Ryan J Delahanty, Chenjie Zeng, Kyriaki Michailidou, Manjeet K Bolla, Qin Wang, Joe Dennis, Wanqing Wen, Jirong Long, Chun Li, Alison M Dunning, Jenny Chang-Claude, Mitul Shah, Barbara J Perkins, Kamila Czene, Hatef Darabi, Mikael Eriksson, Stig E Bojesen, Børge G NordestgaardSune F Nielsen, Henrik Flyger, Diether Lambrechts, Patrick Neven, Hans Wildiers, Giuseppe Floris, Marjanka K Schmidt, Matti A Rookus, Katja van den Hurk, Wim L A M de Kort, Fergus J Couch, Janet E Olson, Emily Hallberg, Celine Vachon, Anja Rudolph, Petra Seibold, Dieter Flesch-Janys, Julian Peto, Isabel Dos-Santos-Silva, Olivia Fletcher, Nichola Johnson, Heli Nevanlinna, Taru A Muranen, Kristiina Aittomäki, Carl Blomqvist, Jingmei Li, Keith Humphreys, Judith Brand, Pascal Guénel, Thérèse Truong, kConFab Investigators, Australian Ovarian Study Group

70 Citationer (Scopus)

Abstract

Background: Epidemiological studies have linked adult height with breast cancer risk in women. However, the magnitude of the association, particularly by subtypes of breast cancer, has not been established. Furthermore, the mechanisms of the association remain unclear. Methods: We performed a meta-analysis to investigate associations between height and breast cancer risk using data from 159 prospective cohorts totaling 5 216 302 women, including 113 178 events. In a consortium with individual-level data from 46 325 case patients and 42 482 control subjects, we conducted a Mendelian randomization analysis using a genetic score that comprised 168 height-associated variants as an instrument. This association was further evaluated in a second consortium using summary statistics data from 16 003 case patients and 41 335 control subjects. Results: The pooled relative risk of breast cancer was 1.17 (95% confidence interval [CI] = 1.15 to 1.19) per 10 cm increase in height in the meta-analysis of prospective studies. In Mendelian randomization analysis, the odds ratio of breast cancer per 10 cm increase in genetically predicted height was 1.22 (95% CI = 1.13 to 1.32) in the first consortium and 1.21 (95% CI = 1.05 to 1.39) in the second consortium. The association was found in both premenopausal and postmenopausal women but restricted to hormone receptor-positive breast cancer. Analyses of height-associated variants identified eight new loci associated with breast cancer risk after adjusting for multiple comparisons, including three loci at 1q21.2, DNAJC27, and CCDC91 at genome-wide significance level P < 5 × 10-8. Conclusions: Our study provides strong evidence that adult height is a risk factor for breast cancer in women and certain genetic factors and biological pathways affecting adult height have an important role in the etiology of breast cancer.

OriginalsprogEngelsk
Artikelnummerdjv219
TidsskriftNational Cancer Institute. Journal (Print)
Vol/bind107
Udgave nummer11
Sider (fra-til)1-17
Antal sider17
ISSN0027-8874
DOI
StatusUdgivet - nov. 2015

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