The 6q22.33 locus and breast cancer susceptibility.
The 6q22.33 locus and breast cancer susceptibility.
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DOI：
10.1158/1055-9965.epi-09-0151
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发表时间：
2009-09
期刊：
影响因子：
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通讯作者：
Offit K
中科院分区：
文献类型：
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作者：
Kirchhoff T;Chen ZQ;Gold B;Pal P;Gaudet MM;Kosarin K;Levine DA;Gregersen P;Spencer S;Harlan M;Robson M;Klein RJ;Hudis CA;Norton L;Dean M;Offit K
Recently, we identified a novel breast cancer (BC) susceptibility locus at 6q22.33 following a genome-wide association study (GWAS) in the Ashkenazi Jewish (AJ) genetic isolate. To replicate these findings, we performed case-control association analysis on 6q22.33 (rs2180341) in additional 487 AJ BC cases and in an independent non-Jewish (non-AJ), predominantly European-American (EU-Am), populations of 1,466 BC cases and 1,467 controls. We have confirmed the 6q22.33 association with BC risk in the replication cohorts (per-allele OR=1.18, 95%CI 1.04–1.33, p=0.0083) with the strongest effect in the aggregate meta-analysis of 3,039 BC cases and 2,616 AJ and non-AJ controls (per-allele OR=1.24, 95%CI 1.13–1.36, P=3.85×10−7). We have also shown that the association was slightly stronger with ER positive tumors (per-allele OR=1.35, 95%CI 1.20–1.51, p=2.2×10−5) compared to ER negative tumors (per-allele OR=1.19, 95%CI 0.97–1.47, p=0.1). Furthermore, this study provides a novel insight into the functional significance of 6q22.33 in BC susceptibility. Due to stronger association of 6q22.33 with ER-positive BC we examined the effect of candidate genes on ER response elements (ERE). Upon transfection of overexpressed RNF146 in the MCF-7 BC cell line, we observed diminished expression of an ERE reporter construct. This study confirms the association of 6q22.33 with BC, with slightly stronger effect in ER positive tumors. Further functional studies of candidate genes are in progress and a large replication analysis is being completed as part of an international consortium.
