title: Association study between the cholecystokinin A receptor gene and schizophrenia in the Japanese population.
abstract: Cholecystokinin A receptor (CCK-AR) has been implicated in the pathophysiology of schizophrenia through its mediation of dopamine-release in the central nervous system. Several studies have observed the association between the CCK-AR gene and schizophrenia. Especially, the association has been repeatedly observed between the 779T/C polymorphism and auditory hallucinations or positive symptoms of schizophrenia. In this study, we investigated the association between the 779T/C polymorphism of the CCK-AR gene and schizophrenia in 290 Japanese patients with schizophrenia and 290 controls. As a result, no significant difference was observed in genotypic distributions or allelic frequencies between the patients and controls, although there was a trend for the association between the C allele of the polymorphism and hallucination (P=0.024) or hallucinatory-paranoid state (P=0.049). In conclusion, the present results may not provide evidence for the association between the CCK-AR gene and schizophrenia in the Japanese population.
authors.affiliation: Department of Neuropsychiatry, Graduate School of Medicine, University of Tokyo, Tokyo, Japan.
authors.forename: Takanobu
authors.initials: T
authors.lastname: Minato
authors.forename: Mamoru
authors.initials: M
authors.lastname: Tochigi
authors.forename: Nobumasa
authors.initials: N
authors.lastname: Kato
authors.forename: Tsukasa
authors.initials: T
authors.lastname: Sasaki
mesh_terms: D000328:Adult; D044466:Asian People / Q000235:genetics; D004247:DNA / Q000097:blood / Q000235:genetics / Q000302:isolation & purification; D005260:Female; D005787:Gene Frequency; D006212:Hallucinations / Q000235:genetics; D006801:Humans; D007564:Japan; D008297:Male; D008875:Middle Aged; D020641:Polymorphism, Single Nucleotide; D043886:Receptor, Cholecystokinin A / Q000235:genetics*; D012559:Schizophrenia / Q000235:genetics*; D012565:Schizophrenic Psychology
chemical_list: D043886:Receptor, Cholecystokinin A; D004247:DNA