@article {6813, title = {Shared genetic basis for migraine and ischemic stroke: A genome-wide analysis of common variants.}, journal = {Neurology}, volume = {84}, year = {2015}, month = {2015 May 26}, pages = {2132-45}, abstract = {

OBJECTIVE: To quantify genetic overlap between migraine and ischemic stroke (IS) with respect to common genetic variation.

METHODS: We applied 4 different approaches to large-scale meta-analyses of genome-wide data on migraine (23,285 cases and 95,425 controls) and IS (12,389 cases and 62,004 controls). First, we queried known genome-wide significant loci for both disorders, looking for potential overlap of signals. We then analyzed the overall shared genetic load using polygenic scores and estimated the genetic correlation between disease subtypes using data derived from these models. We further interrogated genomic regions of shared risk using analysis of covariance patterns between the 2 phenotypes using cross-phenotype spatial mapping.

RESULTS: We found substantial genetic overlap between migraine and IS using all 4 approaches. Migraine without aura (MO) showed much stronger overlap with IS and its subtypes than migraine with aura (MA). The strongest overlap existed between MO and large artery stroke (LAS; p = 6.4 {\texttimes} 10(-28) for the LAS polygenic score in MO) and between MO and cardioembolic stroke (CE; p = 2.7 {\texttimes} 10(-20) for the CE score in MO).

CONCLUSIONS: Our findings indicate shared genetic susceptibility to migraine and IS, with a particularly strong overlap between MO and both LAS and CE pointing towards shared mechanisms. Our observations on MA are consistent with a limited role of common genetic variants in this subtype.

}, keywords = {Brain Ischemia, Genome-Wide Association Study, Humans, Migraine with Aura, Migraine without Aura, Stroke}, issn = {1526-632X}, doi = {10.1212/WNL.0000000000001606}, author = {Malik, Rainer and Freilinger, Tobias and Winsvold, Bendik S and Anttila, Verneri and Vander Heiden, Jason and Traylor, Matthew and de Vries, Boukje and Holliday, Elizabeth G and Terwindt, Gisela M and Sturm, Jonathan and Bis, Joshua C and Hopewell, Jemma C and Ferrari, Michel D and Rannikmae, Kristiina and Wessman, Maija and Kallela, Mikko and Kubisch, Christian and Fornage, Myriam and Meschia, James F and Lehtim{\"a}ki, Terho and Sudlow, Cathie and Clarke, Robert and Chasman, Daniel I and Mitchell, Braxton D and Maguire, Jane and Kaprio, Jaakko and Farrall, Martin and Raitakari, Olli T and Kurth, Tobias and Ikram, M Arfan and Reiner, Alex P and Longstreth, W T and Rothwell, Peter M and Strachan, David P and Sharma, Pankaj and Seshadri, Sudha and Quaye, Lydia and Cherkas, Lynn and Sch{\"u}rks, Markus and Rosand, Jonathan and Ligthart, Lannie and Boncoraglio, Giorgio B and Davey Smith, George and van Duijn, Cornelia M and Stefansson, Kari and Worrall, Bradford B and Nyholt, Dale R and Markus, Hugh S and van den Maagdenberg, Arn M J M and Cotsapas, Chris and Zwart, John A and Palotie, Aarno and Dichgans, Martin} }