Evidence for transmission disequilibrium at the DAOA gene locus in a schizophrenia family sample.

Recently, the DAOA gene locus on chromosome 13q32-q34 has been implicated in the etiology of schizophrenia. We genotyped three single-nucleotide polymorphisms (SNPs: rs778294, rs779293 and rs3918342) in this region in 126 Chinese family trios. In this study, we have identified statistically significant transmission disequilibrium in two markers rs778293 (P=0.01) and rs3918342 (P=0.02), and a highly significant under-transmission between haplotype CAT (P=0.0005) and schizophrenia. The results provide further evidence to support that DAOA gene locus is involved in conferring susceptibility to schizophrenia.