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

PLoS One. 2015 Feb 6;10(2):e0117007. doi: 10.1371/journal.pone.0117007. eCollection 2015.

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.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Aged
  • Alleles
  • Asian People / genetics
  • Blood Glucose / analysis
  • Case-Control Studies
  • China / epidemiology
  • Cholesterol, HDL / blood
  • Cholesterol, LDL / blood
  • Female
  • Genetic Predisposition to Disease
  • Genotype
  • Humans
  • Male
  • MicroRNAs / genetics*
  • Middle Aged
  • Polymorphism, Single Nucleotide*
  • Risk Factors
  • Stroke / blood
  • Stroke / epidemiology
  • Stroke / genetics*

Substances

  • Blood Glucose
  • Cholesterol, HDL
  • Cholesterol, LDL
  • MIRN146 microRNA, human
  • MIRN196 microRNA, human
  • MIRN499 microRNA, human
  • MicroRNAs

Grants and funding

This work was supported by the following sources: National Natural Science Foundation of China (no: 30771852, JQC), for study design, China Postdoctoral Scientific Foundation (no:2014M562031, SLH) for data collection and analysis, and National Natural Science Foundation of China (no: 81402754, SLH) for preparation of the manuscript.