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Association between miR-27a genetic variants and susceptibility to colorectal cancer

Zaiqiu Wang12, Xiaoli Sun3, Yeli Wang2, Xiaofang Liu4, Yuanjie Xuan2 and Sanyuan Hu1*

Author Affiliations

1 Department of General Surgery, Qilu Hospital of Shandong University, Jinan, Shandong 250012, China

2 Department of Anorectal, Yuhuangding Hospital, Yantai, Shandong 264000, China

3 Department of Laboratory, Yuhuangding Hospital, Yantai, Shandong 264000, China

4 Department of Hepatobiliary, Yuhuangding Hospital, Yantai, Shandong 264000, China

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Diagnostic Pathology 2014, 9:146  doi:10.1186/1746-1596-9-146

Published: 30 July 2014

Abstract

Background

MicroRNAs (miRNAs) are short, non-coding RNAs that negatively regulate target genes. A single nucleotide polymorphism (SNP) in a miRNA sequence may alter miRNA expression and/or maturation, which was proposed to associate with the development and progression of cancer. The rs895819 polymorphism, located in the terminal loop of pre-miR-27a, has been reported to have relevance to several cancers. In this study, we investigated the possibility of association between polymorphism in rs895819 and susceptibility to colorectal cancer (CRC).

Methods

We identified a single SNP, rs895819 in pre-miR-27a, for further investigation, were determined in 205 CRC patients and 455 healthy controls.

Results

When taking the AA genotype as a reference, we found that AG genotype was not statistically significantly associated with the risk of CRC (AG vs. AA, OR 1.245, 95% CI: 0.806 – 1.923). However, the GG genotype was significantly associated with risk of CRC (GG vs. AA, OR 1.599, 95% CI: 1.052 – 2.430). In the AG + GG vs GG group, no significant difference was detected (OR 1.424, 95% CI, 0.974 – 1.801). GG genotype and G allele was associated with an increased risk of metastasis in this study (P < 0.001 and P = 0.003, respectively).

Conclusions

This study found significant association between rs895819 polymorphism in pre-miR-27a and CRC risk. Population-based studies with large number of subjects and long-term follow-up are needed to verify the association of miR-27a polymorphism with CRC susceptibility and severity.

The virtual slide(s) for this article can be found here: http://www.diagnosticpathology.diagnomx.eu/vs/2061490734125077 webcite

Keywords:
Single nucleotide polymorphism; Colorectal cancer; miR-27a; Risk factor