Association of the Single Nucleotide Polymorphisms in microRNAs 130b, 200b, and 495 with Ischemic Stroke Susceptibility and Post-Stroke Mortality

PLoS One. 2016 Sep 7;11(9):e0162519. doi: 10.1371/journal.pone.0162519. eCollection 2016.

Abstract

The microRNA (miRNA) is a small non-coding RNA molecule that modulates gene expression at the posttranscriptional level. Platelets have a crucial role in both hemostasis and thrombosis, a condition that can occlude a cerebral artery and cause ischemic stroke. miR-130b, miR-200b, and miR-495 are potential genetic modulators involving platelet production and activation. We hypothesized that single nucleotide polymorphisms (SNPs) in these miRNAs might potentially contribute to the susceptibility to ischemic stroke and post-stroke mortality. This study included 523 ischemic stroke patients and 400 control subjects. We investigated the association of three miRNA SNPs (miR-130bT>C, miR-200bT>C, and miR-495A>C) with ischemic stroke prevalence and post-stroke mortality. In the multivariate logistic regression, there was no statistically significant difference in the distribution of miR-130bT>C, miR-200bT>C, or miR-495A>C between the ischemic stroke and control groups. In the subgroup analysis based on ischemic stroke subtype, the miR-200b CC genotype was less frequently found in the large-artery atherosclerosis stroke subtype compared with controls (TT+CT vs CC; adjusted odds ratio for CC, 0.506; 95% confidence interval, 0.265-0.965). During a mean follow-up period of 4.80 ± 2.11 years after stroke onset, there were 106 all-cause deaths among the 523 stroke patients. Multivariate Cox regression analysis did not find a significant association between post-stroke mortality and three miRNA SNPs. Our findings suggest that the functional SNP of miR-200b might be responsible for the susceptibility to large-artery atherosclerotic stroke.

MeSH terms

  • Alleles
  • Brain Ischemia / genetics
  • Case-Control Studies
  • Female
  • Gene Frequency
  • Genetic Association Studies*
  • Genetic Predisposition to Disease*
  • Humans
  • Male
  • MicroRNAs / genetics*
  • Middle Aged
  • Multivariate Analysis
  • Polymorphism, Single Nucleotide / genetics*
  • Proportional Hazards Models
  • Risk Factors
  • Stroke / genetics*
  • Stroke / mortality*

Substances

  • MIRN130 microRNA, human
  • MIRN200 microRNA, human
  • MIRN495 microRNA, human
  • MicroRNAs

Grants and funding

This study was partly supported by a grant of the Korea Healthcare technology R&D Project (HI15C1972010015 and HI16C1559), Ministry for Health, Welfare & Family Affairs, Republic of Korea and by Basic Science Research Program through National Research Foundation of Korea Grants funded by the Korean Government (2014R1A1A1002067, 2015R1D1A1A09057432), Republic of Korea. The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.