title: Using endothelial nitric oxide synthase gene polymorphisms to identify intracranial aneurysms more prone to rupture in Japanese patients.
abstract: OBJECTIVE
  Recent investigators found that the presence of three tandem polymorphisms of the endothelial nitric oxide synthase (eNOS) gene-promoter single nucleotide polymorphism (SNP) T-786C, intron-4 27-bp variable number of tandem repeats, and the G894T SNP in exon 7-was indicative of intracranial aneurysms more prone to rupture in a Caucasian patient sample. In the present study, the authors sought to determine whether the presence of these eNOS polymorphisms could indicate which Japanese patients with aneurysms were more endangered by a subarachnoid hemorrhage (SAH).
  
  
  METHODS
  The three eNOS polymorphisms were genotyped in 297 patients with ruptured aneurysms (RAs), 108 patients with unruptured aneurysms (UAs), and 176 healthy volunteers by using polymerase chain reaction. The distribution of the variant alleles did not differ significantly (p > 0.05) between the RA group and the UA group. The frequency of the corresponding genotypes between the two groups and a haplotype analysis did not show any significant differences. Further comparisons of the RA and UA groups with the control group did not yield any significant allele or genotype frequency differences. Conclusions. These data show that the examined set of eNOS polymorphisms were not indicative of which Japanese patients with intracranial aneurysms would suffer an SAH. The presence of eNOS polymorphisms is not useful in identifying intracranial aneurysms that are more prone to rupture in a Japanese patient sample.
authors.affiliation: Division of Genetic Diagnosis, Institute of Medical Science, The University of Tokyo, Tokyo, Japan. boris@krischek.de
authors.forename: Boris
authors.initials: B
authors.lastname: Krischek
authors.forename: Hidetoshi
authors.initials: H
authors.lastname: Kasuya
authors.forename: Hiroyuki
authors.initials: H
authors.lastname: Akagawa
authors.forename: Atsushi
authors.initials: A
authors.lastname: Tajima
authors.forename: Akira
authors.initials: A
authors.lastname: Narita
authors.forename: Hideaki
authors.initials: H
authors.lastname: Onda
authors.forename: Tomokatsu
authors.initials: T
authors.lastname: Hori
authors.forename: Ituro
authors.initials: I
authors.lastname: Inoue
mesh_terms: D000328:Adult; D000368:Aged; D017542:Aneurysm, Ruptured / Q000208:ethnology / Q000235:genetics*; D044466:Asian People / Q000235:genetics*; D016022:Case-Control Studies; D005260:Female; D020022:Genetic Predisposition to Disease / Q000208:ethnology / Q000235:genetics; D006801:Humans; D002532:Intracranial Aneurysm / Q000150:complications* / Q000208:ethnology / Q000235:genetics*; D008297:Male; D008875:Middle Aged; D052250:Nitric Oxide Synthase Type III / Q000235:genetics*; D011110:Polymorphism, Genetic / Q000235:genetics*; D018570:Risk Assessment
chemical_list: C496314:NOS3 protein, human; D052250:Nitric Oxide Synthase Type III