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Published in: Cancer Causes & Control 6/2013

01-06-2013 | Original paper

Association of germline microRNA SNPs in pre-miRNA flanking region and breast cancer risk and survival: the Carolina Breast Cancer Study

Authors: Jeannette T. Bensen, Chiu Kit Tse, Sarah J. Nyante, Jill S. Barnholtz-Sloan, Stephen R. Cole, Robert C. Millikan

Published in: Cancer Causes & Control | Issue 6/2013

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Abstract

Purpose

Common germline variation in the 5′ region proximal to precursor (pre-) miRNA gene sequences is evaluated for association with breast cancer risk and survival among African Americans and Caucasians.

Methods

We genotyped nine single nucleotide polymorphisms (SNPs) within six miRNA gene regions previously associated with breast cancer, in 1,972 cases and 1,776 controls. In a race-stratified analysis using unconditional logistic regression, odds ratios (ORs) and 95 % confidence intervals (CIs) were calculated to evaluate SNP association with breast cancer risk. Additionally, hazard ratios (HRs) for breast cancer-specific mortality were estimated.

Results

Two miR-185 SNPs provided suggestive evidence of an inverse association with breast cancer risk (rs2008591, OR = 0.72 (95 % CI = 0.53–0.98, p value = 0.04) and rs887205, OR = 0.71 (95 % CI = 0.52–0.96, p value = 0.03), respectively) among African Americans. Two SNPs, miR-34b/34c (rs4938723, HR = 0.57 (95 % CI = 0.37–0.89, p value = 0.01)) and miR-206 (rs6920648, HR = 0.77 (95 % CI = 0.61–0.97, p value = 0.02)), provided evidence of association with breast cancer survival. Further adjustment for stage resulted in more modest associations with survival (HR = 0.65 [95 % CI = 0.42–1.02, p value = 0.06] and HR = 0.79 [95 % CI = 0.62–1.00, p value = 0.05, respectively]).

Conclusions

Our results suggest that germline variation in the 5′ region proximal to pre-miRNA gene sequences may be associated with breast cancer risk among African Americans and breast cancer-specific survival generally; however, further validation is needed to confirm these findings.
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Metadata
Title
Association of germline microRNA SNPs in pre-miRNA flanking region and breast cancer risk and survival: the Carolina Breast Cancer Study
Authors
Jeannette T. Bensen
Chiu Kit Tse
Sarah J. Nyante
Jill S. Barnholtz-Sloan
Stephen R. Cole
Robert C. Millikan
Publication date
01-06-2013
Publisher
Springer Netherlands
Published in
Cancer Causes & Control / Issue 6/2013
Print ISSN: 0957-5243
Electronic ISSN: 1573-7225
DOI
https://doi.org/10.1007/s10552-013-0187-z

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