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. 2010 Jul 29:10:59.
doi: 10.1186/1471-244X-10-59.

The DAOA/G30 locus and affective disorders: haplotype based association study in a polydiagnostic approach

Micha Gawlik  1 , Ingeborg Wehner, Meinhard Mende, Sven Jung, Bruno Pfuhlmann, Michael Knapp, Gerald Stöber
Affiliations

The DAOA/G30 locus and affective disorders: haplotype based association study in a polydiagnostic approach

Micha Gawlik et al. BMC Psychiatry. .

Abstract

Background: The DAOA/G30 (D-amino acid oxidase activator) gene complex at chromosomal region 13q32-33 is one of the most intriguing susceptibility loci for the major psychiatric disorders, although there is no consensus about the specific risk alleles or haplotypes across studies.

Methods: In a case-control sample of German descent (affective psychosis: n = 248; controls: n = 188) we examined seven single nucleotide polymorphisms (SNPs) around DAOA/G30 (rs3916966, rs1935058, rs2391191, rs1935062, rs947267, rs3918342, and rs9558575) for genetic association in a polydiagnostic approach (ICD 10; Leonhard's classification).

Results: No single marker showed evidence of overall association with affective disorder neither in ICD10 nor Leonhard's classification. Haplotype analysis revealed no association with recurrent unipolar depression or bipolar disorder according to ICD10, within Leonhard's classification manic-depression was associated with a 3-locus haplotype (rs2391191, rs1935062, and rs3916966; P = 0.022) and monopolar depression with a 5-locus combination at the DAOA/G30 core region (P = 0.036).

Conclusion: Our data revealed potential evidence for partially overlapping risk haplotypes at the DAOA/G30 locus in Leonhard's affective psychoses, but do not support a common genetic contribution of the DAOA/G30 gene complex to the pathogenesis of affective disorders.

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Figures

Figure 1
Figure 1
Gene structure of G72/G30 on chromosome 13q33 and location of genotyped SNPs. The G30 and G72/DAOA locus and locatiom of the analysed SNPs. G30 exons are marked with yellow, G72 with blue, LD-blocks with orange bars. Arrows indicate orientation on the chromosomal strand Chromosomal position (nt).
See this image and copyright information in PMC

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