title: Association of polymorphisms in the haplotype block spanning the alternatively spliced exons of the NTNG1 gene at 1p13.3 with schizophrenia in Japanese populations.
abstract: Chromosome 1p13 is linked with schizophrenia in Japanese families, and one of the candidate genes in this region is the netrin G1 (NTNG1) gene at 1p13.3. Associations of 56 tag single-nucleotide polymorphisms (SNPs) with schizophrenia were explored by transmission disequilibrium analysis in 160 Japanese trios and by case-control analysis in 2,174 Japanese cases and 2,054 Japanese controls. An association between SNP rs628117 and schizophrenia was identified by case-control comparison (nominal allelic p=0.0009; corrected p=0.006). The associated polymorphism is located in intron 9 and in the haplotype block encompassing the alternatively spliced exons of the gene. Allelic association of a different SNP in the same haplotype block in Japanese families was previously reported. These findings support that the NTNG1 gene is associated with schizophrenia in the Japanese.
authors.affiliation: Department of Medical Genetics, Doctoral Program in Social and Environmental Medicine, Graduate School of Comprehensive Human Sciences, University of Tsukuba, Tsukuba, Ibaraki 305-8575 Japan.
authors.forename: T
authors.initials: T
authors.lastname: Ohtsuki
authors.forename: Y
authors.initials: Y
authors.lastname: Horiuchi
authors.forename: M
authors.initials: M
authors.lastname: Koga
authors.forename: H
authors.initials: H
authors.lastname: Ishiguro
authors.forename: T
authors.initials: T
authors.lastname: Inada
authors.forename: N
authors.initials: N
authors.lastname: Iwata
authors.forename: N
authors.initials: N
authors.lastname: Ozaki
authors.forename: H
authors.initials: H
authors.lastname: Ujike
authors.forename: Y
authors.initials: Y
authors.lastname: Watanabe
authors.forename: T
authors.initials: T
authors.lastname: Someya
authors.forename: T
authors.initials: T
authors.lastname: Arinami
mesh_terms: D000328:Adult; D016022:Case-Control Studies; D016009:Chi-Square Distribution; D002878:Chromosomes, Human, Pair 1 / Q000235:genetics*; D005091:Exons; D005260:Female; D058851:GPI-Linked Proteins; D005787:Gene Frequency; D020022:Genetic Predisposition to Disease; D006023:Glycoproteins / Q000235:genetics*; D006239:Haplotypes; D006801:Humans; D007564:Japan; D008297:Male; D008875:Middle Aged; D009419:Nerve Tissue Proteins / Q000235:genetics*; D000075385:Netrins; D020641:Polymorphism, Single Nucleotide; D012326:RNA Splicing; D012559:Schizophrenia / Q000235:genetics*
chemical_list: D058851:GPI-Linked Proteins; D006023:Glycoproteins; C463082:NTNG1 protein, human; D009419:Nerve Tissue Proteins; D000075385:Netrins