Alcohol consumption, cigarette smoking, and risk of breast cancer for BRCA1 and BRCA2 mutation carriers: results from The BRCA1 and BRCA2 Cohort Consortium - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Cancer Epidemiology, Biomarkers and Prevention Année : 2019

Alcohol consumption, cigarette smoking, and risk of breast cancer for BRCA1 and BRCA2 mutation carriers: results from The BRCA1 and BRCA2 Cohort Consortium

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D. Gareth Evans
  • Fonction : Auteur
Louise Izatt
  • Fonction : Auteur
Mary Porteous
  • Fonction : Auteur
  • PersonId : 895026
Marinus Blok
  • Fonction : Auteur
  • PersonId : 907009
Ana Osorio
  • Fonction : Auteur
Trinidad Caldés
Anna Jakubowska
Jacques Simard
Christian Singer
  • Fonction : Auteur
  • PersonId : 910055
Brita Arver
  • Fonction : Auteur

Résumé

BACKGROUND: Tobacco smoking and alcohol consumption have been intensively studied in the general population to assess their effects on the risk of breast cancer (BC), but very few studies have examined these effects in BRCA1 and BRCA2 mutation carriers. Given the high BC risk for mutation carriers and the importance of BRCA1 and BRCA2 in DNA repair, better evidence on the associations of these lifestyle factors with BC risk is essential. METHODS: Using a large international pooled cohort of BRCA1 and BRCA2 mutation carriers, we conducted retrospective (5,707 BRCA1 mutation carriers; 3,525 BRCA2 mutation carriers) and prospective (2,276 BRCA1 mutation carriers; 1,610 BRCA2 mutation carriers) analyses of alcohol and tobacco consumption using Cox proportional hazards models. RESULTS: For both BRCA1 and BRCA2 mutation carriers, none of the smoking-related variables was associated with BC risk, except smoking for more than five years before a first full-term pregnancy (FFTP) when compared to parous women who never smoked. For BRCA1 mutation carriers, the HR from retrospective analysis (HRR) was 1.19 (95%CI:1.02,1.39) and the HR from prospective analysis (HRP) was 1.36 (95%CI:0.99,1.87). For BRCA2 mutation carriers, smoking for more than five years before a FFTP showed an association of a similar magnitude, but the confidence limits were wider (HRR=1.25,95%CI:1.01,1.55 and HRP=1.30,95%CI:0.83,2.01). For both carrier groups, alcohol consumption was not associated with BC risk. CONCLUSIONS: The finding that smoking during the pre-reproductive years increases BC risk for mutation carriers warrants further investigation. IMPACT: This is the largest prospective study of BRCA mutation carriers to assess these important risk factors.
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inserm-02438388 , version 1 (14-01-2020)

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Mary Beth Terry, Catherine Noguès, Daniel Barrowdale, Debra Frost, Carole Brewer, et al.. Alcohol consumption, cigarette smoking, and risk of breast cancer for BRCA1 and BRCA2 mutation carriers: results from The BRCA1 and BRCA2 Cohort Consortium: Alcohol and smoking and breast cancer risk for BRCA carriers. Cancer Epidemiology, Biomarkers and Prevention, 2019, 27, cebp.0546.2019. ⟨10.1158/1055-9965.EPI-19-0546⟩. ⟨inserm-02438388⟩
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