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Global DNA methylation of ischemic stroke subtypes
Carolina Soriano-Tárraga1, Jordi Jiménez-Conde1, Eva Giralt-Steinhauer1
1Department of Neurology, Neurovascular Research Group, IMIM-Hospital del Mar (Institut Hospital del Mar d'Investigacions Mèdiques), Universitat Autonoma de Barcelona/DCEXS-Universitat Pompeu Fabra, Barcelona, Spain.
Plos One
|May 3, 2014
Summary
Global DNA methylation levels did not differ between the three main subtypes of ischemic stroke (IS) in two independent patient cohorts. This suggests that global DNA methylation may not be a key differentiator for these common IS classifications.
Area of Science:
- Neuroscience
- Genetics
- Epigenetics
Background:
- Ischemic stroke (IS) is a significant cause of death and disability.
- While genetics play a role, the epigenetic involvement in IS remains unclear.
- Epigenetic mechanisms like DNA methylation are dynamic and linked to aging and disease risk.
Purpose of the Study:
- To investigate global DNA methylation differences between the three most common ischemic stroke subtypes.
- To determine if epigenetic mechanisms, specifically DNA methylation, differentiate large-artery atherosclerosis (LAA), small-artery disease (SAD), and cardio-aortic embolism (CE) subtypes.
Main Methods:
- Analysis of DNA blood samples from 485 IS patients across two independent cohorts.
- Global DNA methylation measured using luminometric methylation assay (LUMA).
- Univariate and multivariate regression analyses performed, adjusting for age, sex, hyperlipidemia, and smoking.
Main Results:
- No statistically significant differences in LUMA levels were found between LAA, SAD, and CE subtypes in univariate analyses.
- Multivariate analyses, controlling for key risk factors, also confirmed the absence of global methylation differences between the IS subtypes.
- These findings indicate no distinction in global DNA methylation across the major etiologies of ischemic stroke.
Conclusions:
- Global DNA methylation does not appear to differentiate between LAA, SAD, and CE subtypes of ischemic stroke.
- Further research is necessary to explore the potential role of specific epigenetic modifications in the pathogenesis of ischemic stroke.
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