Conflict of Interest Statement: The authors declare that there is no conflict of interest.
Association of a GRIA3 Gene Polymorphism With Migraine in an Australian Case-Control Cohort
Article first published online: 14 JUN 2013
© 2013 American Headache Society
Headache: The Journal of Head and Face Pain
Volume 53, Issue 8, pages 1245–1249, September 2013
How to Cite
Maher, B. H., Lea, R. A., Follett, J., Cox, H. C., Fernandez, F., Esposito, T., Gianfrancesco, F., Haupt, L. M. and Griffiths, L. R. (2013), Association of a GRIA3 Gene Polymorphism With Migraine in an Australian Case-Control Cohort. Headache: The Journal of Head and Face Pain, 53: 1245–1249. doi: 10.1111/head.12151
- Issue published online: 10 SEP 2013
- Article first published online: 14 JUN 2013
- Accepted manuscript online: 16 MAY 2013 07:01AM EST
- Manuscript Accepted: 11 MAY 2013
- Australian DEST International Science Linkages grant
- Australian Postgraduate Award Scholarship
- Corbett Research Fellowship
The excitatory neurotransmitter glutamate has been implicated in both the hyperexcitability required for cortical spreading depression as well as activation of the trigeminovascular system required for the allodynia associated with migraine. Polymorphisms in the glutamate receptor ionotropic amino-3-hydroxy-5-methyl-4-isoxazole-propionin acid 1 (GRIA1) and GRIA3 genes that code for 2 of 4 subunits of the glutamate receptor have been previously associated with migraine in an Italian population. In addition, the GRIA3 gene is coded within a previously identified migraine susceptibility locus at Xq24. This study investigated the previously associated polymorphisms in both genes in an Australian case-control population.
Variants in GRIA1 and GRIA3 were genotyped in 472 unrelated migraine cases and matched controls, and data were analyzed for association.
Analysis showed no association between migraine and the GRIA1 gene. However, association was observed with the GRIA3 single nucleotide polymorphism (SNP) rs3761555 (P = .008).
The results of this study confirmed the previous report of association at the rs3761555 SNP within the migraine with aura subgroup of migraineurs. However, the study identified association with the inverse allele suggesting that rs3761555 may not be the causative SNP but is more likely in linkage disequilibrium with another causal variant in both populations. This study supports the plethora of evidence suggesting that glutamate dysfunction may contribute to migraine susceptibility, warranting further investigation of the glutamatergic system and particularly of the GRIA3 gene.