title: No association between polymorphisms of neuronal oxide synthase 1 gene (NOS1) and schizophrenia in a Japanese population.
abstract: The neuronal nitric oxide synthase gene (NOS1) is located on 12q24, in a susceptibility region for schizophrenia, and produces nitric oxide (NO) in the brain. NO plays a role in neurotransmitter release and is the second messenger of the N-methyl-D-aspartate (NMDA) receptor. Furthermore, it is connected to the dopaminergic and serotonergic neural transmission systems. Therefore, abnormalities in the NO pathway are thought to be involved in the pathophysiology of schizophrenia. Several genetic studies showed an association of NOS1 with schizophrenia. However, results of replication studies have been inconsistent. Therefore, we conducted a replication study of NOS1 with schizophrenia in a Japanese sample. We selected seven SNPs (rs41279104, rs3782221, rs3782219, rs561712, rs3782206, rs2682826, and rs6490121) in NOS1 that were positively associated with schizophrenia in previous studies. Two SNPs showed an association with Japanese schizophrenic patients (542 cases and 519 controls, rs3782219: P allele = 0.0291 and rs3782206: P allele = 0.0124, P genotype = 0.0490), and almost these significances remained with an increased sample size (1154 cases and 1260 controls, rs3782219: P allele = 0.0197 and rs3782206: P allele = 0.0480). However, these associations also might have resulted from type I error on account of multiple testing (rs3782219: P allele = 0.133 and rs3782206: P allele = 0.168). In conclusion, we could not replicate the association between seven SNPs in NOS1 and schizophrenia found in several earlier studies, using larger Japanese schizophrenia and control samples.
authors.affiliation: Department of Psychiatry, Fujita Health University School of Medicine, Toyoake, Aichi, 470-1192, Japan.
authors.forename: Takenori
authors.initials: T
authors.lastname: Okumura
authors.forename: Tomo
authors.initials: T
authors.lastname: Okochi
authors.forename: Taro
authors.initials: T
authors.lastname: Kishi
authors.forename: Masashi
authors.initials: M
authors.lastname: Ikeda
authors.forename: Tsuyoshi
authors.initials: T
authors.lastname: Kitajima
authors.forename: Yoshio
authors.initials: Y
authors.lastname: Yamanouchi
authors.forename: Yoko
authors.initials: Y
authors.lastname: Kinoshita
authors.forename: Kunihiro
authors.initials: K
authors.lastname: Kawashima
authors.forename: Tomoko
authors.initials: T
authors.lastname: Tsunoka
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Ujike
authors.forename: Toshiya
authors.initials: T
authors.lastname: Inada
authors.forename: Norio
authors.initials: N
authors.lastname: Ozaki
authors.forename: Nakao
authors.initials: N
authors.lastname: Iwata
mesh_terms: D000328:Adult; D044466:Asian People / Q000235:genetics*; D004252:DNA Mutational Analysis; D005260:Female; D020022:Genetic Predisposition to Disease; D005838:Genotype; D006239:Haplotypes; D006801:Humans; D007527:Isoenzymes / Q000235:genetics / Q000378:metabolism; D008297:Male; D008875:Middle Aged; D009569:Nitric Oxide / Q000378:metabolism; D052248:Nitric Oxide Synthase Type I / Q000235:genetics* / Q000378:metabolism; D020641:Polymorphism, Single Nucleotide; D012559:Schizophrenia / Q000235:genetics*; D055815:Young Adult
chemical_list: D007527:Isoenzymes; D009569:Nitric Oxide; C496320:NOS1 protein, human; D052248:Nitric Oxide Synthase Type I