Journal Article

DKFZ-2019-01356

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Mediation analysis of the alcohol-postmenopausal breast cancer relationship by sex hormones in the EPIC cohort.

Assi, N. ; Rinaldi, S. ; Viallon, V. ; Dashti, S. G. ; Dossus, L. ; Fournier, A. ; Cervenka, I. ; Kvaskoff, M. ; Turzanski-Fortner, R.DKFZ* ; Bergmann, M. ; Boeing, H. ; Panico, S. ; Ricceri, F. ; Palli, D. ; Tumino, R. ; Grioni, S. ; Sánchez Pérez, M. J. ; Chirlaque, M.-D. ; Bonet, C. ; Gurrea, A. B. ; Amiano Etxezarreta, P. ; Merino, S. ; Bueno de Mesquita, H. B. ; van Gils, C. H. ; Onland-Moret, C. ; Tjønneland, A. ; Overvad, K. ; Trichopoulou, A. ; Martimianaki, G. ; Karakatsani, A. ; Key, T. ; Christakoudi, S. ; Ellingjord-Dale, M. ; Tsilidis, K. ; Riboli, E. ; Kaaks, R.DKFZ* ; Gunter, M. J. ; Ferrari, P.

2020
Wiley-Liss Bognor Regis

This record in other databases:  

Please use a persistent id in citations: doi:10.1002/ijc.32324

Abstract: Alcohol consumption is associated with higher risk of breast cancer (BC); however, the biological mechanisms underlying this association are not fully elucidated, particularly the extent to which this relationship is mediated by sex hormone levels. Circulating concentrations of estradiol, testosterone, their free fractions and sex-hormone binding globulin (SHBG), were examined in 430 incident BC cases and 645 matched controls among alcohol-consuming postmenopausal women nested within the European Prospective Investigation into Cancer and Nutrition. Mediation analysis was applied to assess whether individual hormone levels mediated the relationship between alcohol intake and BC risk. An alcohol-related hormonal signature, obtained by partial least square (PLS) regression, was evaluated as a potential mediator. Total (TE), natural direct and natural indirect effects (NIE) were estimated. Alcohol intake was positively associated with overall BC risk and specifically with estrogen receptor-positive tumors with respectively TE = 1.17(95%CI: 1.01,1.35) and 1.36(1.08,1.70) for a 1-standard deviation (1-SD) increase of intake. There was no evidence of mediation by sex steroids or SHBG separately except for a weak indirect effect through free estradiol where NIE = 1.03(1.00,1.06). However, an alcohol-related hormonal signature negatively associated with SHBG and positively with estradiol and testosterone was associated with BC risk (odds ratio [OR] = 1.25 [1.07,1.47]) for a 1-SD higher PLS score, and had a statistically significant NIE accounting for a mediated proportion of 24%. There was limited evidence of mediation of the alcohol-BC association by individual sex hormones. However, a hormonal signature, reflecting lower levels of SHBG and higher levels of sex steroids, mediated a substantial proportion of the association.

Note: 2020 Feb 1;146(3):759-768

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Contributing Institute(s):

1. Epidemiologie von Krebserkrankungen (C020)

Research Program(s):

1. 313 - Cancer risk factors and prevention (POF3-313) (POF3-313)

Appears in the scientific report 2020

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Database coverage:
; BIOSIS Previews ; Clarivate Analytics Master Journal List ; Current Contents - Life Sciences ; IF >= 5 ; JCR ; NCBI Molecular Biology Database ; Nationallizenz ; SCOPUS ; Science Citation Index ; Science Citation Index Expanded ; Web of Science Core Collection

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