CYP3A7*1C allele: linking premenopausal oestrone and progesterone levels with risk of hormone receptor-positive breast cancers

Nichola Johnson, Sarah Maguire, Anna Morra, Pooja Middha Kapoor, Katarzyna Tomczyk, Michael E Jones, Minouk J Schoemaker, Clare Gilham, Manjeet K Bolla, Qin Wang, Joe Dennis, Thomas U Ahearn, Irene L Andrulis, Hoda Anton-Culver, Natalia N Antonenkova, Volker Arndt, Kristan J Aronson, Annelie Augustinsson, Caroline Baynes, Laura E Beane FreemanMatthias W Beckmann, Javier Benitez, Marina Bermisheva, Carl Blomqvist, Bram Boeckx, Natalia V Bogdanova, Stig E Bojesen, Hiltrud Brauch, Hermann Brenner, Barbara Burwinkel, Daniele Campa, Federico Canzian, Jose E Castelao, Stephen J Chanock, Georgia Chenevix-Trench, Christine L Clarke, Don M Conroy, Fergus J Couch, Angela Cox, Simon S Cross, Kamila Czene, Thilo Dörk, A Heather Eliassen, Christoph Engel, D Gareth Evans, Peter A Fasching, Jonine Figueroa, Henrik Flyger, Sune F Nielsen, Børge G Nordestgaard, NBCS Collaborators

7 Citations (Scopus)

Abstract

BACKGROUND: Epidemiological studies provide strong evidence for a role of endogenous sex hormones in the aetiology of breast cancer. The aim of this analysis was to identify genetic variants that are associated with urinary sex-hormone levels and breast cancer risk.

METHODS: We carried out a genome-wide association study of urinary oestrone-3-glucuronide and pregnanediol-3-glucuronide levels in 560 premenopausal women, with additional analysis of progesterone levels in 298 premenopausal women. To test for the association with breast cancer risk, we carried out follow-up genotyping in 90,916 cases and 89,893 controls from the Breast Cancer Association Consortium. All women were of European ancestry.

RESULTS: For pregnanediol-3-glucuronide, there were no genome-wide significant associations; for oestrone-3-glucuronide, we identified a single peak mapping to the CYP3A locus, annotated by rs45446698. The minor rs45446698-C allele was associated with lower oestrone-3-glucuronide (-49.2%, 95% CI -56.1% to -41.1%, P = 3.1 × 10-18); in follow-up analyses, rs45446698-C was also associated with lower progesterone (-26.7%, 95% CI -39.4% to -11.6%, P = 0.001) and reduced risk of oestrogen and progesterone receptor-positive breast cancer (OR = 0.86, 95% CI 0.82-0.91, P = 6.9 × 10-8).

CONCLUSIONS: The CYP3A7*1C allele is associated with reduced risk of hormone receptor-positive breast cancer possibly mediated via an effect on the metabolism of endogenous sex hormones in premenopausal women.

Original languageEnglish
JournalBritish Journal of Cancer
Volume124
Issue number4
Pages (from-to)842-854
Number of pages13
ISSN0007-0920
DOIs
Publication statusPublished - 16 Feb 2021

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