title: Endothelial nitric oxide synthase (Glu298Asp) polymorphism is an independent risk factor for migraine with aura.
abstract: OBJECTIVE
  The aim of the present study was to evaluate whether the functional endothelial nitric oxide synthase (eNOS) Glu298Asp polymorphism, which has been demonstrated to decrease the endothelial NOS activity, might be a risk factor for migraine.
  
  
  BACKGROUND
  It has widely demonstrated that nitric oxide (NO) is involved in migraine pathogenesis. Several genetic risk factors have been associated with migraine, but no study has unraveled a possible relationship between migraine and eNOS Glu298Asp. Methods.-One hundred fifty-six migraine patients and 125 healthy nonheadache volunteers entered the study. Demographic and clinical characteristics were carefully recorded, and a neurological workup was performed.
  
  
  RESULTS
  eNOS AspAsp homozygous patients had a 3-fold time risk for migraine with aura (MA) when compared to migraine without aura (MO) patients (OR-3.02, 95% CI-1.21 to 7.51), and more than 2-fold time increased risk when compared to control subjects (OR-2.21, 95% CI-1.00 to 5.04). In migraine patients, no difference in age at onset, mean attack's intensity, family history for any of the studied comorbidities, or the presence of comorbidities was found in eNOS AspAsp homozygous compared to eNOS GluGlu or eNOS GluAs carriers.
  
  
  CONCLUSIONS
  Homozygous Asp298, a common variant of the eNOS gene, is an independent risk factor for MA in this study population.
authors.affiliation: Department of Medical Sciences, Neurological Clinic, University of Brescia, Brescia, Italy.
authors.forename: Barbara
authors.initials: B
authors.lastname: Borroni
authors.forename: Renata
authors.initials: R
authors.lastname: Rao
authors.forename: Paolo
authors.initials: P
authors.lastname: Liberini
authors.forename: Elisabetta
authors.initials: E
authors.lastname: Venturelli
authors.forename: Michela
authors.initials: M
authors.lastname: Cossandi
authors.forename: Silvana
authors.initials: S
authors.lastname: Archetti
authors.forename: Luigi
authors.initials: L
authors.lastname: Caimi
authors.forename: Alessandro
authors.initials: A
authors.lastname: Padovani
mesh_terms: D000328:Adult; D000483:Alleles; D019943:Amino Acid Substitution; D005260:Female; D005787:Gene Frequency; D005838:Genotype; D006801:Humans; D008297:Male; D020325:Migraine with Aura / Q000453:epidemiology* / Q000235:genetics*; D052250:Nitric Oxide Synthase Type III / Q000235:genetics*; D011110:Polymorphism, Genetic / Q000235:genetics*; D012307:Risk Factors
chemical_list: D052250:Nitric Oxide Synthase Type III