title: No association of GRIP1 gene polymorphisms with schizophrenia in Chinese population.
abstract: Disturbance in glutamate neurotransmission has been implicated in the pathophysiology of schizophrenia. Since glutamate receptor interacting protein 1 (GRIP1), a modular protein that enables anchoring of AMPA receptors via its PDZ (postsynaptic density-95/discs large/zona occludens-1) domain and modulates d-serine release, plays an important role in glutamatergic function, this study tests the hypothesis that GRIP1 genetic variants confer susceptibility to schizophrenia. This study investigated whether GRIP1 genetic polymorphisms (rs1038923 and rs4913301) cause a predisposal to schizophrenia. Two GRIP1 polymorphisms were studied in a sample population of 252 people with schizophrenia and 207 normal controls. Significant linkage disequilibrium was obtained between the two polymorphisms. Results demonstrated that neither single marker nor haplotype analysis revealed an association between variants at the GRIP1 locus and schizophrenia, suggesting that it is unlikely that the GRIP1 polymorphisms investigated play a substantial role in conferring susceptibility to schizophrenia. However, association between schizophrenia and other polymorphisms in the GRIP1 gene cannot be totally ruled out as the whole gene was not covered by the two polymorphisms studied.
authors.affiliation: Department of Psychiatry, Taipei Veterans General Hospital, Taipei, Taiwan. sjtsai@vghtpe.gov.tw
authors.forename: Shih-Jen
authors.initials: SJ
authors.lastname: Tsai
authors.forename: Ying-Jay
authors.initials: YJ
authors.lastname: Liou
authors.forename: Ding-Lieh
authors.initials: DL
authors.lastname: Liao
authors.forename: Chih-Ya
authors.initials: CY
authors.lastname: Cheng
authors.forename: Chen-Jee
authors.initials: CJ
authors.lastname: Hong
mesh_terms: D000328:Adult; D044466:Asian People / Q000208:ethnology; D002352:Carrier Proteins / Q000235:genetics*; D016009:Chi-Square Distribution; D005260:Female; D005787:Gene Frequency; D020022:Genetic Predisposition to Disease; D005838:Genotype; D006801:Humans; D015810:Linkage Disequilibrium; D008297:Male; D008875:Middle Aged; D009419:Nerve Tissue Proteins / Q000235:genetics*; D011110:Polymorphism, Genetic; D012559:Schizophrenia / Q000235:genetics*
chemical_list: D002352:Carrier Proteins; C491310:GRIP1 protein, human; D009419:Nerve Tissue Proteins