title: The relationships between endothelial nitric oxide synthase polymorphisms and the formation of intracranial aneurysms in the Korean population.
abstract: OBJECTIVE
  Some genetic factors are known to be associated with the formation of cerebral aneurysms in the Caucasian population. One of these factors is endothelial nitric oxide synthase (eNOS) gene polymorphisms. Endothelial nitric oxide synthase genes encode eNOS, which synthesizes NO from l-arginine. There continues to be controversy about the relationships between eNOS gene polymorphisms and the formation of intracranial aneurysms. In this study, the authors evaluated these relationships in the Korean population.
  
  
  METHODS
  Three eNOS polymorphisms (eNOS 27VNTR, T786C, and G894T) were genotyped in 96 patients with ruptured aneurysms, 53 patients with unruptured aneurysms, and in 121 volunteers via polymerase chain reaction-restriction fragment length polymorphism analysis.
  
  
  RESULTS
  The mean ages of the patients and healthy volunteers were 52.9 ± 12.3 years and 55.2 ± 9.1 years, respectively. The patient group was composed of 56 men and 93 women, and the healthy volunteer group was composed of 46 men and 75 women. Only the incidence of smoking history was significantly higher in the patient group than in the control group (p = 0.001). The genotypic frequencies for the 3 eNOS gene polymorphisms were in agreement with those predicted by Hardy-Weinberg equilibrium. There were no significant associations between the eNOS recessive models and the formation of an aneurysm. The authors found no genotypic differences between similar races among patients with aneurysms.
  
  
  CONCLUSIONS
  The present study shows that eNOS 27VNTR, T786C, and G894T polymorphisms cannot be used as indicators of the formation of intracranial aneurysms in Korean patients. To confirm these findings an additional analyses might need to be performed using a larger sample size. There were no differences in the genotypic distributions and allelic frequencies between similar races among patients with aneurysms, which were the same in previously reported normal populations.
authors.affiliation: Institute for Clinical Research, CHA University, Bundang-gu, Seongnam, Republic of Korea.
authors.forename: Tae Gon
authors.initials: TG
authors.lastname: Kim
authors.forename: Nam Keun
authors.initials: NK
authors.lastname: Kim
authors.forename: Min Jung
authors.initials: MJ
authors.lastname: Baek
authors.forename: Ryoung
authors.initials: R
authors.lastname: Huh
authors.forename: Sang Sup
authors.initials: SS
authors.lastname: Chung
authors.forename: Joong Uhn
authors.initials: JU
authors.lastname: Choi
authors.forename: So Young
authors.initials: SY
authors.lastname: Yu
mesh_terms: D000328:Adult; D000368:Aged; D044466:Asian People / Q000235:genetics*; D005260:Female; D020022:Genetic Predisposition to Disease / Q000208:ethnology / Q000235:genetics*; D006801:Humans; D002532:Intracranial Aneurysm / Q000201:enzymology* / Q000208:ethnology / Q000235:genetics*; D008297:Male; D008875:Middle Aged; D052250:Nitric Oxide Synthase Type III / Q000235:genetics*; D011110:Polymorphism, Genetic / Q000235:genetics*; D056910:Republic of Korea / Q000453:epidemiology
chemical_list: C496314:NOS3 protein, human; D052250:Nitric Oxide Synthase Type III