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Recently, a locus on chromosome 6q22.33 (rs2180341) was reported to be associated with increased breast cancer risk in the Ashkenazi Jewish (AJ) population, and this association was also observed in populations of non-AJ European ancestry. In the present study, we performed a large replication analysis of rs2180341 using data from 31,428 invasive breast cancer cases and 34,700 controls collected from 25 studies in the Breast Cancer Association Consortium (BCAC). In addition, we evaluated whether rs2180341 modifies breast cancer risk in 3,361 BRCA1 and 2,020 BRCA2 carriers from 11 centers in the Consortium of Investigators of Modifiers of BRCA1/2 (CIMBA). Based on the BCAC data from women of European ancestry, we found evidence for a weak association with breast cancer risk for rs2180341 (per-allele odds ratio (OR) = 1.03, 95% CI 1.00-1.06, p = 0.023). There was evidence for heterogeneity in the ORs among studies (I(2) = 49.3%; p = <0.004). In CIMBA, we observed an inverse association with the minor allele of rs2180341 and breast cancer risk in BRCA1 mutation carriers (per-allele OR = 0.89, 95%CI 0.80-1.00, p = 0.048), indicating a potential protective effect of this allele. These data suggest that that 6q22.33 confers a weak effect on breast cancer risk.

Original publication

DOI

10.1371/journal.pone.0035706

Type

Journal article

Journal

PloS one

Publication Date

01/2012

Volume

7

Addresses

Memorial Sloan-Kettering Cancer Center (MSKCC): Clinical Genetics Service, Memorial Sloan-Kettering Cancer Center, New York, New York, United States of America (TK, MG, KO); Department of Environmental Medicine, New York University Cancer Institute, New York University, New York, New York, United States of America (TK), American Cancer Society, Atlanta, Georgia, United States of America (MG).

Keywords

GENICA Network, kConFab, AOCS Study Group, SWE-BRCA, HEBON, EMBRACE, BCAC/CIMBA, Chromosomes, Human, Pair 6, Humans, Breast Neoplasms, Genetic Predisposition to Disease, BRCA1 Protein, BRCA2 Protein, Receptors, Estrogen, Confidence Intervals, Proportional Hazards Models, Odds Ratio, Risk Factors, Heterozygote, Polymorphism, Single Nucleotide, Alleles, Middle Aged, Female, Genetic Association Studies