title: NOD2/CARD15 gene polymorphisms and Crohn's disease in the Chinese population.
abstract: BACKGROUND
  Crohn's disease affects people world-wide, but the incidence in Asia is lower than in Western countries. This difference may be due to genetic and/or environmental factors. Three single nucleotide polymorphisms (SNPs) of the NOD2/CARD15 gene have been identified to be independently associated with the development of Crohn's disease in Caucasians. Whether these SNPs are involved in the pathogenesis of Crohn's disease in the Chinese population is unknown.
  
  
  OBJECTIVE
  To determine if NOD2/CARD15 gene polymorphisms are found in Chinese patients with Crohn's disease.
  
  
  METHODS
  Sixty-five consecutive Chinese Crohn's disease patients had genotyping performed using sequence-specific PCR directed against the wild-type and the Arg702Trp, Gly908Arg and 3020insC variants of the NOD2/CARD15 gene. Controls consisted of 63 patients with ulcerative colitis and 70 patients with dyspepsia.
  
  
  RESULTS
  None of the patients with Crohn's disease had heterozygous or homozygous SNP variants. Similarly none of the ulcerative colitis or dyspeptic controls had these SNPs.
  
  
  CONCLUSIONS
  The three previously described SNPs associated with the development of Crohn's disease in Caucasians are not found in Chinese patients with Crohn's disease.
authors.affiliation: Department of Medicine and Therapeutics, Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, Hong Kong, China. rupertleong@hotmail.com
authors.forename: R W L
authors.initials: RW
authors.lastname: Leong
authors.forename: A
authors.initials: A
authors.lastname: Armuzzi
authors.forename: T
authors.initials: T
authors.lastname: Ahmad
authors.forename: M L
authors.initials: ML
authors.lastname: Wong
authors.forename: P
authors.initials: P
authors.lastname: Tse
authors.forename: D P
authors.initials: DP
authors.lastname: Jewell
authors.forename: J J Y
authors.initials: JJ
authors.lastname: Sung
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D002352:Carrier Proteins / Q000235:genetics*; D002681:China / Q000208:ethnology; D003424:Crohn Disease / Q000208:ethnology / Q000235:genetics*; D005260:Female; D005838:Genotype; D006801:Humans; D047908:Intracellular Signaling Peptides and Proteins; D008297:Male; D008875:Middle Aged; D009154:Mutation / Q000235:genetics*; D053473:Nod2 Signaling Adaptor Protein; D016133:Polymerase Chain Reaction / Q000379:methods; D011110:Polymorphism, Genetic / Q000235:genetics*
chemical_list: D002352:Carrier Proteins; D047908:Intracellular Signaling Peptides and Proteins; C429018:NOD2 protein, human; D053473:Nod2 Signaling Adaptor Protein