Genetic association analysis of miRNA SNPs implicates MIR145 in breast cancer susceptibility.

Abstract:

BACKGROUND:MicroRNAs (miRNAs) are important small non-coding RNA molecules that regulate gene expression in cellular processes related to the pathogenesis of cancer. Genetic variation in miRNA genes could impact their synthesis and cellular effects and single nucleotide polymorphisms (SNPs) are one example of genetic variants studied in relation to breast cancer. Studies aimed at identifying miRNA SNPs (miR-SNPs) associated with breast malignancies could lead towards further understanding of the disease and to develop clinical applications for early diagnosis and treatment. METHODS:We genotyped a panel of 24 miR-SNPs using multiplex PCR and chip-based matrix assisted laser desorption ionization time-of-flight (MALDI-TOF) mass spectrometry (MS) analysis in two Caucasian breast cancer case control populations (Primary population: 173 cases and 187 controls and secondary population: 679 cases and 301 controls). Association to breast cancer susceptibility was determined using chi-square (X (2) ) and odds ratio (OR) analysis. RESULTS:Statistical analysis showed six miR-SNPs to be non-polymorphic and twelve of our selected miR-SNPs to have no association with breast cancer risk. However, we were able to show association between rs353291 (located in MIR145) and the risk of developing breast cancer in two independent case control cohorts (p = 0.041 and p = 0.023). CONCLUSIONS:Our study is the first to report an association between a miR-SNP in MIR145 and breast cancer risk in individuals of Caucasian background. This finding requires further validation through genotyping of larger cohorts or in individuals of different ethnicities to determine the potential significance of this finding as well as studies aimed to determine functional significance.

journal_name

BMC Med Genet

journal_title

BMC medical genetics

authors

Chacon-Cortes D,Smith RA,Haupt LM,Lea RA,Youl PH,Griffiths LR

doi

10.1186/s12881-015-0248-0

subject

Has Abstract

pub_date

2015-11-17 00:00:00

pages

107

issn

1471-2350

pii

10.1186/s12881-015-0248-0

journal_volume

16

pub_type

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