title: The 1246G-->A polymorphism of the HCRTR2 gene is not associated with migraine.
abstract: Studies in experimental animals have suggested that the hypocretin/orexin system may be involved in migraine pathophysiology. Using a case-control design study, we genotyped 246 migraine patients and 239 healthy controls for the 1246G-->A polymorphism of the hypocretin receptor 2 (HCRTR2) gene. Genotypic and allelic frequencies of the examined polymorphism were similarly distributed between cases and controls (chi2 = 2.22, P = 0.14 and chi2 = 2.45, P = 0.29, respectively). When different migraine subgroups were compared (migraine with aura vs. migraine without aura and episodic vs. chronic migraine) no significant difference was found. Comparison of the clinical features of the disease with the 1246G-->A genotypes showed no significant difference. Our data suggest that the HCRTR2 gene is not a genetic risk factor in migraine.
authors.affiliation: Neurology II, Headache Centre, Department of Neuroscience, University of Torino, Torino, Italy. lorenzo.pinessi@unito.it
authors.forename: L
authors.initials: L
authors.lastname: Pinessi
authors.forename: E
authors.initials: E
authors.lastname: Binello
authors.forename: P
authors.initials: P
authors.lastname: De Martino
authors.forename: S
authors.initials: S
authors.lastname: Gallone
authors.forename: S
authors.initials: S
authors.lastname: Gentile
authors.forename: I
authors.initials: I
authors.lastname: Rainero
authors.forename: C
authors.initials: C
authors.lastname: Rivoiro
authors.forename: E
authors.initials: E
authors.lastname: Rubino
authors.forename: L
authors.initials: L
authors.lastname: Savi
authors.forename: W
authors.initials: W
authors.lastname: Valfrè
authors.forename: G
authors.initials: G
authors.lastname: Vaula
mesh_terms: D000328:Adult; D016022:Case-Control Studies; D005260:Female; D020022:Genetic Predisposition to Disease; D006801:Humans; D008297:Male; D008881:Migraine Disorders / Q000235:genetics*; D064446:Orexin Receptors; D016133:Polymerase Chain Reaction; D020641:Polymorphism, Single Nucleotide; D043562:Receptors, G-Protein-Coupled / Q000235:genetics*; D018013:Receptors, Neuropeptide / Q000235:genetics*
chemical_list: D064446:Orexin Receptors; D043562:Receptors, G-Protein-Coupled; D018013:Receptors, Neuropeptide