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The association between pre-miR-27a rs895819 polymorphism and myocardial infarction risk in a Chinese Han population.

The association between pre-miR-27a rs895819 polymorphism and myocardial infarction risk in a Chinese Han population.
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Cai MY, Cheng J, Zhou MY, Liang LL, Lian SM, Xie XS, Xu S, Liu X, Xiong XD,


Cai MY, Cheng J, Zhou MY, Liang LL, Lian SM, Xie XS, Xu S, Liu X, Xiong XD, (click to view)

Cai MY, Cheng J, Zhou MY, Liang LL, Lian SM, Xie XS, Xu S, Liu X, Xiong XD,

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Lipids in health and disease 2018 01 0617(1) 7 doi 10.1186/s12944-017-0652-x
Abstract
BACKGROUND
Accumulating evidences have shown that miRNAs are directly or indirectly involved in a variety of biological processes, and closely associated with diverse human diseases, including cardiovascular diseases. SNPs locating within pri/pre-miRNA can affect miRNA processing and binding ability of target genes. MiR-27a, miR-26a-1 miR-100, miR-126 and miR-218 were reported to be associated with pathogenesis of myocardial infarction (MI). Here we aimed to evaluate the potential association of five polymorphisms in these pri/pre-miRNAs with individual susceptibility to MI in a Chinese Han population.

METHODS
Genotyping was performed in 287 MI cases and 646 control subjects using polymerase chain reaction-ligase detection reaction (PCR-LDR) method. The association of these SNPs with MI risk was performed with SPSS software.

RESULTS
In a logistic regression analysis, we found that AG heterozygote (OR = 0.40, 95% CI = 0.21-0.76, Pa = 0.005) or AA homozygote (OR = 0.40, 95% CI = 0.22-0.75, Pa = 0.004) of pre-miR-27a rs895819 had a reduced susceptibility to MI in comparison with GG homozygote. Similarly, a reduced risk of MI was detected when the AG and AA genotypes were combined (OR = 0.40, 95% CI = 0.22-0.74, Pa = 0.003). However, no significant association between pri-miR-26a-1 pri-miR-100, pri-miR-126 and pri-miR-218 polymorphisms and MI risk was observed under the allelic and established genetic models. Further stratified analysis of pre-miR-27a rs895819 revealed a more significant association of AG + AA genotypes with MI risk among younger, male and smoking subjects. Interestingly, AG and AA genotypes of the rs895819 polymorphism conferred about 0.17 mmol/L and 0.18 mmol/L increase in HDL-C levels compared to GG genotype.

CONCLUSIONS
Our findings suggest that the pre-miR-27a rs895819 polymorphism is associated with MI susceptibility in the Chinese Han population, which probably due to influence the HDL-C levels.

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