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Association of the genetic polymorphisms in pre-microRNAs with risk of ischemic stroke in a Chinese population.

PloS one (2015-02-07)
Suli Huang, Shiquan Zhou, Yanwei Zhang, Ziquan Lv, Shanshan Li, Changhui Xie, Yuebin Ke, Pingjian Deng, Yijie Geng, Qian Zhang, Xiaofan Chu, Zhaohui Yi, Ying Zhang, Tangchun Wu, Jinquan Cheng
ABSTRACT

microRNA (miRNA) plays a role in the pathogenesis of ischemic stroke, and single nucleotide polymorphisms in miRNA genes may contribute to disease susceptibility. However, the effect of miR-146a, miR-196a2, and miR-499 polymorphisms on ischemic stroke susceptibility has been rarely reported. Using the TaqMan assay, we evaluated the association of hsa-miR-146a/rs2910164, hsa-miR-196a2/rs11614913, and hsa-miR-499/rs3746444 polymorphisms with the risk of ischemic stroke in a Chinese population with 531 ischemic stroke patients and 531 control subjects. Rs2910164 C/G genotypes were significantly associated with increased risk of ischemic stroke in different genetic model (homozygote comparison: OR = 2.00, 95% CI, 1.29-3.12, P = 0.002; additive model: OR = 1.35, 95% CI, 1.10-1.65, P = 0.004;dominant model: OR = 1.33, 95% CI, 1.00-1.75, P = 0.049; recessive model: OR = 1.82, 95% CI, 1.20-2.74, P = 0.004). Subjects with allele G of hsa-miR-146a/ rs2910164 also showed increased risk of ischemic stroke (OR = 1.33, 95% CI, 1.09-1.62, P = 0.005). Stratification analysis showed that the association between rs2910164 and the risk of ischemic stroke was more pronounced in subjects over 60 years old, females, non-drinkers, subjects without hypertension or diabetes mellitus. There were significant combined effects between miR-146a/rs2910164 and fasting glucose/low-density lipoprotein cholesterol levels on ischemic stroke susceptibility. However, we failed to find any association between the alleles/genotypes of rs11614913 T/C and ischemic stroke, respectively (P> 0.05). In summary, this study provides evidence that miR-146a/rs2910164 might be associated with a significantly increased risk of ischemic stroke in a Chinese population, and the combined effects between miRNA polymorphism and fasting glucose /blood lipid levels may contribute to stroke pathogenesis.

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