Abstract
Background and Purpose - Although a genetic contribution to ischemic stroke is well recognized, only a handful of stroke loci have been identified by large-scale genetic association studies to date. Hypothesizing that genetic effects might be stronger for early-versus late-onset stroke, we conducted a 2-stage meta-analysis of genome-wide association studies, focusing on stroke cases with an age of onset < 60 years. Methods. The discovery stage of our genome-wide association studies included 4505 cases and 21968 controls of European, South-Asian, and African ancestry, drawn from 6 studies. In Stage 2, we selected the lead genetic variants at loci with association P<5×10-6 and performed in silico association analyses in an independent sample of ≤1003 cases and 7745 controls. Results.One stroke susceptibility locus at 10q25 reached genome-wide significance in the combined analysis of all samples from the discovery and follow-up stages (rs11196288; odds ratio =1.41; P=9.5×10-9). The associated locus is in an intergenic region between TCF7L2 and HABP2. In a further analysis in an independent sample, we found that 2 single nucleotide polymorphisms in high linkage disequilibrium with rs11196288 were significantly associated with total plasma factor VII.activating protease levels, a product of HABP2. Conclusions.HABP2, which encodes an extracellular serine protease involved in coagulation, fibrinolysis, and inflammatory pathways, may be a genetic susceptibility locus for early-onset stroke.
Original language | English (US) |
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Pages (from-to) | 307-316 |
Number of pages | 10 |
Journal | Stroke |
Volume | 47 |
Issue number | 2 |
DOIs | |
State | Published - Feb 1 2016 |
Keywords
- Factor VII
- Genetics
- Genome-wide analysis
- Ischemic stroke
- Stroke
ASJC Scopus subject areas
- Clinical Neurology
- Cardiology and Cardiovascular Medicine
- Advanced and Specialized Nursing