title: Association study of the dysbindin (DTNBP1) gene in schizophrenia from the Japanese population.
abstract: Dysbindin (DTNBP1: dystrobrevin binding protein 1), located on 6p22.3, is a candidate susceptibility gene for schizophrenia. Several studies, mostly in Caucasians, have provided evidence for an association between schizophrenia and the gene, although no common polymorphism or haploytpe has been established. In Asian populations, two studies investigated a limited number of single nucleotide polymorphisms (SNPs) of dysbindin and observed support for the association. In the present study, we investigated 12 SNPs of dysbindin, including those examined in previous Asian studies, and the corresponding haplotypes in a Japanese people with schizophrenia. As a result, no significant difference was observed between patients and controls in allelic frequencies or genotypic distributions of the 12 SNPs. Permutation test however showed significant differences in frequencies of the estimated 10-marker haplotypes between patients and controls (global p = 0.006). The present study may provide further support for an association between dysbindin and schizophrenia in Asian populations. The results might be similar to a previous Asian study, but specific haplotypes suggested for the association differed between the studies. Studies with more markers and subjects may be required before firm conclusions can be reached.
authors.affiliation: Department of Neuropsychiatry, Graduate School of Medicine, University of Tokyo, Tokyo, Japan.
authors.forename: Mamoru
authors.initials: M
authors.lastname: Tochigi
authors.forename: Xuan
authors.initials: X
authors.lastname: Zhang
authors.forename: Jun
authors.initials: J
authors.lastname: Ohashi
authors.forename: Hiroyuki
authors.initials: H
authors.lastname: Hibino
authors.forename: Takeshi
authors.initials: T
authors.lastname: Otowa
authors.forename: Mark
authors.initials: M
authors.lastname: Rogers
authors.forename: Tadafumi
authors.initials: T
authors.lastname: Kato
authors.forename: Yuji
authors.initials: Y
authors.lastname: Okazaki
authors.forename: Nobumasa
authors.initials: N
authors.lastname: Kato
authors.forename: Katsushi
authors.initials: K
authors.lastname: Tokunaga
authors.forename: Tsukasa
authors.initials: T
authors.lastname: Sasaki
mesh_terms: D000328:Adult; D000368:Aged; D002352:Carrier Proteins / Q000235:genetics*; D016009:Chi-Square Distribution; D000074765:Dysbindin; D049029:Dystrophin-Associated Proteins; D005260:Female; D005787:Gene Frequency; D020022:Genetic Predisposition to Disease; D006801:Humans; D007564:Japan / Q000453:epidemiology / Q000208:ethnology; D008297:Male; D008875:Middle Aged; D020641:Polymorphism, Single Nucleotide / Q000235:genetics; D012559:Schizophrenia / Q000235:genetics*
chemical_list: D002352:Carrier Proteins; C432416:DTNBP1 protein, human; D000074765:Dysbindin; D049029:Dystrophin-Associated Proteins