title: An association analysis of synapse-associated protein 97 (SAP97) gene in schizophrenia.
abstract: SAP97 gene encodes the synaptic scaffolding PDZ proteins that interact with the L: -alpha-amino-3-hydroxyl-5-methylisoxazole-4-propionate (AMPA), kainate and N-methyl-D: -aspartate (NMDA) type glutamate receptors. Because the disturbed glutamate neurotransmission has been implicated in the pathophysiology of schizophrenia, we investigated association between the SAP97 gene and schizophrenia. We genotyped 23 SNPs capturing the known common haplotype variations of the gene in a sample comprising 229 schizophrenic patients and 214 matched controls. In a single marker analysis, ten SNPs displayed nominally significant (P < 0.05) association with schizophrenia, although the P values of these SNPs were non-significant after the Bonferroni correction. We also compared haplotype estimates based on case--control genotypes and observed significant association of eight-two- and three- SNP haplotypes with schizophrenia following permutation-based correction. Further examination of the above series of SNPs or haplotypes in each gender revealed significant associations between some of these SNPs or haplotypes and the disorder only in males. The present findings suggest that the SAP97 gene may be a susceptibility factor in male schizophrenics and that the modification of the glutamate receptors-SAP97 signaling pathway could be involved in the disease pathophysiology.
authors.affiliation: Section of Psychiatry and Behavioral Sciences, Tokyo Medical and Dental University Graduate School, 1-5-45, Bunkyo-ku, Tokyo 113-8519, Japan.
authors.forename: Junko
authors.initials: J
authors.lastname: Sato
authors.forename: Dai
authors.initials: D
authors.lastname: Shimazu
authors.forename: Naoki
authors.initials: N
authors.lastname: Yamamoto
authors.forename: Toru
authors.initials: T
authors.lastname: Nishikawa
mesh_terms: D048868:Adaptor Proteins, Signal Transducing / Q000235:genetics*; D000328:Adult; D001921:Brain / Q000378:metabolism / Q000503:physiopathology; D001923:Brain Chemistry / Q000235:genetics*; D016022:Case-Control Studies; D004252:DNA Mutational Analysis; D000074288:Discs Large Homolog 1 Protein; D005260:Female; D005787:Gene Frequency; D020022:Genetic Predisposition to Disease / Q000235:genetics*; D005820:Genetic Testing; D005838:Genotype; D006239:Haplotypes / Q000235:genetics; D006801:Humans; D008297:Male; D008565:Membrane Proteins / Q000235:genetics*; D008875:Middle Aged; D020641:Polymorphism, Single Nucleotide / Q000235:genetics*; D017470:Receptors, Glutamate / Q000378:metabolism; D012559:Schizophrenia / Q000235:genetics* / Q000378:metabolism* / Q000503:physiopathology; D017678:Sex Distribution; D015398:Signal Transduction / Q000235:genetics; D013570:Synaptic Membranes / Q000235:genetics / Q000378:metabolism; D009435:Synaptic Transmission / Q000235:genetics
chemical_list: D048868:Adaptor Proteins, Signal Transducing; C513314:DLG1 protein, human; D000074288:Discs Large Homolog 1 Protein; D008565:Membrane Proteins; D017470:Receptors, Glutamate