Neuregulin 3 genetic variations and susceptibility to schizophrenia in a Chinese population

Biological Psychiatry
Ying-Chieh WangYing-Jay Liou

Abstract

The study investigated the possible association of NRG3 gene and schizophrenia in a Han Chinese population. Of a total of 1345, 270 unrelated schizophrenia inpatients, 235 normal control subjects, and 280 nuclear families (trios) with schizophrenia probands were studied. Nine single nucleotide polymorphisms (SNPs) spanning intron 1 to exon 9 of the NRG3 gene were analyzed, starting with the case-control samples. The SNPs showing significant association with schizophrenia in the case-control samples were subsequently studied in the independent trio samples with family-based association analysis. In case-control samples, two SNPs (rs1937970 and rs677221) showed significant genotypic and allelic association with schizophrenia (all p < .05) with rs677221-C being the risk allele for schizophrenia (uncorrected p = .001, odds ratio = 1.439, 95% confidence interval = 1.115-1.858). Haplotypes GC constructed by the two SNPs was also significantly associated with schizophrenia (permutation p value = .0047). In the independent trio samples, rs1937970-A and rs677221-G consistently showed significant under-transmission to schizophrenic offspring (unadjusted p = .003 and p = .004, respectively). In the haplotype-transmission disequilibrium te...Continue Reading

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