title: Age and sex dependent genetic effects of neuropeptide Y promoter polymorphism on susceptibility to ischemic stroke in Koreans.
abstract: BACKGROUND
  In our previous study, the neuropeptide Y (NPY) C-399T promoter polymorphism (rs16147C>T) was identified as a risk factor for ischemic stroke in Koreans. In this study, we investigated whether age and sex modify the genetic effect of C-399T on susceptibility to ischemic stroke.
  
  
  METHODS
  A total of 1,350 subjects (802 ischemic stroke patients, 548 healthy controls) were genotyped for C-399T using a primer extension method. The results were statistically analyzed for the genetic association of C-399T with ischemic stroke and clinical parameters.
  
  
  RESULTS
  The TT genotype for C-399T was observed at a significantly lower frequency in stroke patients relative to control (CC+CT vs. TT, odds ratio [OR]=0.578, 95% confidence interval [95% CI]=0.360-0.927, P<0.05). This trend was also observed in female (OR=0.495, 95% CI=0.240-1.022) and older subjects (y>60, OR=0.556, 95% CI=0.304-1.018) with borderline statistical significance (P=0.0571 and P=0.0574, respectively). However, C-399T allele frequency was not different between controls and stroke patients in any groups. The C-399T polymorphism was found to be associated with body mass index and levels of some blood lipids.
  
  
  CONCLUSIONS
  The C-399T NPY promoter polymorphism should be considered a genetic risk factor for ischemic stroke in the older adult and female Korean populations.
authors.affiliation: Brain Disease Research Center, Division of Traditional Korean Medicine Integrated Research, Korea Institute of Oriental Medicine, Daejeon 305-811, Republic of Korea.
authors.forename: No S
authors.initials: NS
authors.lastname: Kim
authors.forename: Mi M
authors.initials: MM
authors.lastname: Ko
authors.forename: Min H
authors.initials: MH
authors.lastname: Cha
authors.forename: Se-Mi
authors.initials: SM
authors.lastname: Oh
authors.forename: Ok S
authors.initials: OS
authors.lastname: Bang
mesh_terms: D000367:Age Factors; D000368:Aged; D002545:Brain Ischemia / Q000235:genetics*; D005260:Female; D020022:Genetic Predisposition to Disease; D006801:Humans; D007124:Immunoenzyme Techniques; D007723:Korea; D008297:Male; D008875:Middle Aged; D009478:Neuropeptide Y / Q000235:genetics*; D011401:Promoter Regions, Genetic; D012737:Sex Factors; D020521:Stroke / Q000235:genetics*
chemical_list: D009478:Neuropeptide Y