title: Association between Interleukin 31 Receptor A Gene Polymorphism and Schizophrenia in Korean Population.
abstract: Recently, Sun et al (2008) reported that the IL6R polymorphism is associated with schizophrenia. Therefore, to detect the association between polymorphisms of interleukin 31 receptor A (IL31RA) and schizophrenia, we genotyped 9 SNPs [rs9292101 (intron 1), rs1009639 (exon 2, Pro43Pro), rs2161582 (intron 2), rs68761890 (intron 5), rs16884629 (intron 6), rs11956465 (intron 12), rs12153724 (intron 12), and rs16884641 (intron 14)] using the Golden Gate assay on Illumina BeadStation 500 GX. Two hundred eighteen patients with schizophrenia and 379 normal subjects were recruited. Patients with schizophrenia were diagnosed according to DSM-IV, and control subjects without history of psychiatric disorders were selected. We used SNPStats, Haploview, HapAnalyzer, SNPAnalyzer, and Helixtree programs for the evaluation of genetic data. Of nine polymorphisms, three SNPs (rs9292101, rs1009639, and rs11956465) were associated with schizophrenia. The rs9292101 and rs11956465 showed significant associations with the risk of schizophrenia in the codominant [rs9292101, odds ratio (OR)=0.74, 95% confidence interval (CI)=0.58~0.95, p=0.017] and recessive (rs11956465, OR=0.64, 95% CI=0.42~0.96, p=0.034) models, respectively. The rs1009639 also was statistically related to schizophrenia in both codominant (OR=0.76, 95% CI=0.60~0.97, p=0.025) and dominant (OR=0.66, 95% CI=0.44~0.98, p=0.035) models. Two linkage disequilibrium (LD) blocks were made. In the analysis of haplotypes, a haplotype (GCT) in block 1 and a haplotype (CCACAG) in block 2 showed significant associations between schizophrenia and control groups (haplotype GCT, frequency=0.509, chi square=4.199, p=0.040; haplotype CCACAG, frequency=0.289, chi square=5.691, p=0.017). The results suggest that IL31RA may be associated with risk of schizophrenia in Korean population.
authors: Kohwang Medical Research Institute, School of Medicine, Kyung Hee University, Seoul 130-701, Korea.
authors: Ju Yeon
authors: JY
authors: Ban
authors: Su Kang
authors: SK
authors: Kim
authors: Hak-Jae
authors: HJ
authors: Kim
authors: Joo-Ho
authors: JH
authors: Chung
authors: Tae
authors: T
authors: Kim
authors: Jin Kyung
authors: JK
authors: Park
authors: Hyun-Kyung
authors: HK
authors: Park
authors: Jong Woo
authors: JW
authors: Kim