title: SNP variants within the vanilloid TRPV1 and TRPV3 receptor genes are associated with migraine in the Spanish population.
abstract: The transient receptor potential (TRP) superfamily of non-selective cationic channels are involved in several processes plausibly relevant to migraine pathophysiology, including multimodal sensory and pain perception, central and peripheral sensitization, and regulation of calcium homeostasis. With the aim of identifying single nucleotide polymorphisms (SNPs) in TRP genes that may confer increased genetic susceptibility to migraine, we carried out a case-control genetic association study with replication, including a total of 1,040 cases and 1,037 controls. We genotyped 149 SNPs covering 14 TRP genes with known brain expression. The two-stage study comprised samples of 555 and 485 Spanish, Caucasian patients, selected according to the ICHD-II criteria for the diagnosis of migraine without aura (MO) or migraine with aura (MA). In the discovery sample, 19 SNPs in ten TRP genes showed nominal association (P < 0.05) with MO, MA, or overall migraine. In the replication sample, nominal association was confirmed for TRPV3 rs7217270 in MA and TRPV1 rs222741 in the overall migraine group. Risk haplotypes were identified for seven of the genes showing nominal association in the discovery set, but none of them was replicated. The present findings suggest that members of the vanilloid TRPV subfamily of receptors contribute to the genetic susceptibility to migraine in the Spanish population.
authors.affiliation: Facultat de Biologia, Departament de Genètica, Universitat de Barcelona, Barcelona, Spain.
authors.forename: Oriel
authors.initials: O
authors.lastname: Carreño
authors.forename: Roser
authors.initials: R
authors.lastname: Corominas
authors.forename: Jessica
authors.initials: J
authors.lastname: Fernández-Morales
authors.forename: Montserrat
authors.initials: M
authors.lastname: Camiña
authors.forename: María-Jesús
authors.initials: MJ
authors.lastname: Sobrido
authors.forename: José Manuel
authors.initials: JM
authors.lastname: Fernández-Fernández
authors.forename: Patricia
authors.initials: P
authors.lastname: Pozo-Rosich
authors.forename: Bru
authors.initials: B
authors.lastname: Cormand
authors.forename: Alfons
authors.initials: A
authors.lastname: Macaya
mesh_terms: D000328:Adult; D016022:Case-Control Studies; D005260:Female; D056726:Genetic Association Studies; D005819:Genetic Markers; D020022:Genetic Predisposition to Disease; D006801:Humans; D015810:Linkage Disequilibrium / Q000235:genetics; D008297:Male; D008881:Migraine Disorders / Q000235:genetics*; D020325:Migraine with Aura / Q000235:genetics; D020641:Polymorphism, Single Nucleotide / Q000235:genetics*; D015203:Reproducibility of Results; D012984:Software; D013030:Spain; D050053:TRPM Cation Channels / Q000235:genetics; D050916:TRPV Cation Channels / Q000235:genetics*
chemical_list: D005819:Genetic Markers; D050053:TRPM Cation Channels; C425966:TRPM8 protein, human; D050916:TRPV Cation Channels; C494482:TRPV1 protein, human; C459445:TRPV3 protein, human