C.D.A. and A.B. contributed equally to the present study.
Common mitochondrial sequence variants in ischemic stroke†
Article first published online: 13 SEP 2010
Copyright © 2010 American Neurological Association
Annals of Neurology
Volume 69, Issue 3, pages 471–480, March 2011
How to Cite
Anderson, C. D., Biffi, A., Rahman, R., Ross, O. A., Jagiella, J. M., Kissela, B., Cole, J. W., Cortellini, L., Rost, N. S., Cheng, Y.-C., Greenberg, S. M., de Bakker, P. I.W., Brown, R. D., Brott, T. G., Mitchell, B. D., Broderick, J. P., Worrall, B. B., Furie, K. L., Kittner, S. J., Woo, D., Slowik, A., Meschia, J. F., Saxena, R., Rosand, J. and on behalf of the International Stroke Genetics Consortium (2011), Common mitochondrial sequence variants in ischemic stroke. Ann Neurol., 69: 471–480. doi: 10.1002/ana.22108
Potential conflict of interest:
- Issue published online: 28 MAR 2011
- Article first published online: 13 SEP 2010
- Manuscript Accepted: 28 MAY 2010
- Manuscript Revised: 18 MAY 2010
- Manuscript Received: 22 MAR 2010
Rare mitochondrial mutations cause neurologic disease, including ischemic stroke and MRI white matter changes. We investigated whether common mitochondrial genetic variants influence risk of sporadic ischemic stroke and, in patients with stroke, the volume of white matter hyperintensity (WMHV).
In this multicenter, mitochondrial genome-wide association study (GWAS), 2284 ischemic stroke cases and 1728 controls from the International Stroke Genetics Consortium were genotyped for 64 mitochondrial single nucleotide polymorphisms (SNPs). Imputation resulted in 144 SNPs, which were tested in each cohort and in meta-analysis for ischemic stroke association. A genetic score of all mitochondrial variants was also tested in association with ischemic stroke.
No individual SNP reached adjusted significance in meta-analysis. A genetic score comprised of the summation of contributions from individual variants across the mitochondrial genome showed association with ischemic stroke in meta-analysis (odds ratio [OR] = 1.13, p < 0.0001) with minimal heterogeneity (I2 = 0.00). This ischemic stroke score was robust to permutation, and was also associated with WMHV in 792 nested case individuals with ischemic stroke (p = 0.037).
In this mitochondrial GWAS of ischemic stroke, a genetic score comprised of the sum of all common variants in the mitochondrial genome showed association with ischemic stroke. In an independent analysis of a related trait, this same score correlated with WMHV in stroke cases. Despite this aggregate association, no individual variant reached significance. Substantially larger studies will be required to identify precise sequence variants influencing cerebrovascular disease.ANN NEUROL 2010;00:000–000