title: Association study of polymorphisms in the GluR6 kainate receptor gene (GRIK2) with schizophrenia.
abstract: The glutamatergic dysfunction hypothesis of schizophrenia suggests genes involved in glutamatergic transmission as candidates for schizophrenia-susceptibility genes. The GluR6 kainate receptor gene GRIK2 is located on chromosome 6q16.3-q21, a schizophrenia susceptibility region, as suggested by multiple linkage studies. We examined 15 SNPs evenly distributed in the entire GRIK2 region (>700 kb) in Japanese patients with schizophrenia (n=100) and controls (n=100). Neither genotype nor allele frequency showed a significant association with the disorder. We constructed 2-SNP haplotypes from the 15 SNPs. Although we observed three long linkage disequilibrium blocks (>150 kb) within the GRIK2 region, none of the pairwise haplotypes showed a significant association with the disorder. Therefore, we conclude that GRIK2 does not play a major role in the pathogenesis of schizophrenia in the Japanese population.
authors.affiliation: Division of Disease Genes, Research Center for Genetic Information, Medical Institute of Bioregulation, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan.
authors.forename: Hiroki
authors.initials: H
authors.lastname: Shibata
authors.forename: Atsushi
authors.initials: A
authors.lastname: Shibata
authors.forename: Hideaki
authors.initials: H
authors.lastname: Ninomiya
authors.forename: Nobutada
authors.initials: N
authors.lastname: Tashiro
authors.forename: Yasuyuki
authors.initials: Y
authors.lastname: Fukumaki
mesh_terms: D000328:Adult; D002896:Chromosomes, Human, Pair 6 / Q000235:genetics; D005260:Female; D015870:Gene Expression / Q000235:genetics*; D005787:Gene Frequency; D005838:Genotype; D006239:Haplotypes; D006801:Humans; D007564:Japan / Q000453:epidemiology; D015810:Linkage Disequilibrium / Q000235:genetics; D008297:Male; D011110:Polymorphism, Genetic / Q000235:genetics*; D012150:Polymorphism, Restriction Fragment Length; D018092:Kainic Acid Receptors / Q000235:genetics*; D012559:Schizophrenia / Q000453:epidemiology / Q000235:genetics*; D000097806:GluK2 Kainate Receptor
chemical_list: D018092:Kainic Acid Receptors; D000097806:GluK2 Kainate Receptor