title: Association of TNFSF15 polymorphisms in Korean children with Crohn's disease.
abstract: BACKGROUND
  Genome-wide association studies have identified tumor necrosis factor superfamily member 15 (TNFSF15) as a Crohn's disease (CD)-related gene. The aim of this study was to evaluate the association between five TNFSF15 polymorphisms and CD in Korean children and analyze their genotypes in relation to phenotype.
  
  
  METHODS
  Five single-nucleotide polymorphisms of TNFSF15 (rs3810936, rs6478108, rs6478109, rs7848647, rs7865494) were genotyped in 108 CD patients and in 599 healthy controls. Risk allele, genotype, and haplotype were analyzed in CD patients and controls, and genotype-phenotype relationships were studied.
  
  
  RESULTS
  There were significant associations of rs3810936, rs6478108, rs6478109, rs7848647 with CD in Korean pediatric patients (P = 6.5×10(-8), P = 1.3×10(-8), P = 3.7×10(-8), P = 2.9×10(-8), respectively). The adjusted OR (aOR) for the homozygous risk allele genotype was significantly higher than that for the homozygous genotype for the opposite allele: rs3810936, aOR, 5.36 (95%CI: 2.61-10.98, P = 4.6×10(-6)); rs6478108, aOR, 6.62 (95%CI: 3.03-14.46, P = 2.2×10(-6)); rs6478109, aOR, 6.24 (95%CI: 2.85-13.66, P = 4.6×10(-6)); rs7848647, aOR, 6.32 (95%CI: 2.89-13.81, P = 3.8×10(-6)). The risk allele of rs3810936 was associated with later symptom onset, later diagnosis, and the presence of perianal lesion (P = 0.013, P = 0.016 and P = 0.029).
  
  
  CONCLUSIONS
  There was a significant association of TNFSF15 with pediatric CD in Korean patients.
authors.affiliation: Department of Pediatrics, Pusan National University Children's Hospital, Yangsan.
authors.forename: Yeoun Joo
authors.initials: YJ
authors.lastname: Lee
authors.affiliation: Department of Pediatrics, Asan Medical Center Children's Hospital.
authors.forename: Kyung Mo
authors.initials: KM
authors.lastname: Kim
authors.affiliation: Department of Pediatrics, Ajou University School of Medicine, Suwon, Korea.
authors.forename: Joo Young
authors.initials: JY
authors.lastname: Jang
authors.affiliation: Department of Biochemistry and Molecular Biology, University of Ulsan College of Medicine, Seoul.
authors.forename: Kyuyoung
authors.initials: K
authors.lastname: Song
mesh_terms: D000293:Adolescent; D000483:Alleles; D002648:Child; D002675:Child, Preschool; D003093:Colitis, Ulcerative / Q000453:epidemiology / Q000235:genetics* / Q000378:metabolism; D003424:Crohn Disease / Q000453:epidemiology / Q000235:genetics* / Q000378:metabolism; D004247:DNA / Q000235:genetics*; D005260:Female; D005500:Follow-Up Studies; D020022:Genetic Predisposition to Disease; D055106:Genome-Wide Association Study; D005838:Genotype; D006801:Humans; D015994:Incidence; D007223:Infant; D008297:Male; D010641:Phenotype; D020641:Polymorphism, Single Nucleotide; D056910:Republic of Korea / Q000453:epidemiology; D012189:Retrospective Studies; D013997:Time Factors; D053380:Tumor Necrosis Factor Ligand Superfamily Member 15 / Q000235:genetics* / Q000378:metabolism
chemical_list: C117026:TNFSF15 protein, human; D053380:Tumor Necrosis Factor Ligand Superfamily Member 15; D004247:DNA
keywords: Crohn's disease; Korea; TNFSF15; child