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No association of ZNF804A rs1344706 with white matter integrity in schizophrenia: a tract-based spatial statistics study.

ABSTRACT: Altered brain connectivity has been widely considered as a genetic risk mechanism for schizophrenia. Of the many susceptibility genes identified so far, ZNF804A (rs1344706) is the first common genetic variant associated with schizophrenia on a genome-wide level. Previous fMRI studies have found that carriers of rs1344706 exhibit altered functional connectivity. However, the relationship between ZNF804A and white matter structural connectivity in patients of schizophrenia remains unknown. In this study, 100 patients with schizophrenia and 69 healthy controls were genotyped at the single nucleotide polymorphism rs1344706. Diffusion tensor imaging (DTI) was conducted and analyzed with tract-based spatial statistics. Systematic statistical analysis was conducted on multiple diffusion indices, including fractional anisotropy, axial diffusivity, radial diffusivity, and mean diffusivity. Unpaired two-sample t-test revealed significant differences in fractional anisotropy and diffusivity between schizophrenia and control groups. A two-way ANOVA analysis was conducted to assess the main effects of and the interaction between schizophrenia and ZNF804A. Although significant main effects of the diagnosis of schizophrenia were found on radial diffusivity, no association between the ZNF804A (rs1344706) and white matter connectivity was found in the entire group of subjects or in a selected subgroup of age-matched subjects (n=72).

SUBMITTER: Wei Q

PROVIDER: S-EPMC4154480 | biostudies-literature | 2013 Jan

REPOSITORIES: biostudies-literature

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No association of ZNF804A rs1344706 with white matter integrity in schizophrenia: a tract-based spatial statistics study.

Wei Qinling Q Kang Zhuang Z Diao Feici F Guidon Arnaud A Wu Xiaoli X Zheng Liangrong L Li Leijun L Guo Xiaofeng X Hu Maorong M Zhang Jinbei J Liu Chunlei C Zhao Jingping J

Neuroscience letters 20121109

Altered brain connectivity has been widely considered as a genetic risk mechanism for schizophrenia. Of the many susceptibility genes identified so far, ZNF804A (rs1344706) is the first common genetic variant associated with schizophrenia on a genome-wide level. Previous fMRI studies have found that carriers of rs1344706 exhibit altered functional connectivity. However, the relationship between ZNF804A and white matter structural connectivity in patients of schizophrenia remains unknown. In this ...[more]

PMID: 23147122

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Project description:Abstract Background: Following both meta-analysis and extensive resequencing, the single-nucleotide polymorphism of allele A, rs1344706, located in intron 2 of the zinc-finger protein gene ZNF804A, continues to be the common variant most strongly associated with schizophrenia risk (P = 1.1_10–13). ZNF804a is highly expressed in adult brain and functional effects on both protein expression, and altered DNA–protein interaction have been reported. In addition, the ZNF804A rs1344706 A allele has recently been reported to be associated with worse clinical outcome. We were interested in examining whether another proxy for worse clinical outcome, the Positive and Negative Syndrome Scale (PANSS) excitement factor, is associated with a ZNF804a genotype. We hypothesized that a single-nucleotide polymorphism in ZNF804a could be associated with impulsivity. The aim of this study was to assess the association of a single-nucleotide polymorphism rs1344706 with the PANSS excitement factor. Methods: We tested the effect of rs1344706 (A/C) genotype in 133 individuals with DSM-5 chronic schizophrenia using the PANSS. Scores on the PANSS excitement factor were compared between individuals who expressed allele A and those who expressed allele C (individuals with the heterogeneous allele A/C were combined to the C group). General Linear Model (GLM) was used to analyze the differences between groups for the PANSS Excitement Factor (assessed by the summation of: excitement, hostility, uncooperativeness, and poor impulse control). Results: A total of 133 subjects were sampled for ZNF804; however, PANSS data were available for 122 subjects. Of the 122, 68.85% (n = 84) of subjects presented with allele A and 31.15% (n = 38) with allele C. In all, 67.85% (n = 57) of the individuals with allele A were African Americans, and 28.95% (n = 11) of individuals with allele C were African Americans, and 39.47% (n = 15) were Hispanics. The PANSS total score for the entire sample was 72.64 (SD = 9.33). PANSS excitement factor scores ranged from 4 to 15 in group A and 4 to 14 in group C. GLM analysis showed a significant difference in ZNF804, F(1, 121) = 5.595, P = .020, between individuals with allele A compared to those with allele C. The mean excitement factor score for allele A was lower (mean = 7.762, SE = 0.273) than for allele C group (mean = 8.921, SE = 0.427). Conclusion: While the risk “A” allele at rs1344706 has been associated with altered functional brain connectivity and represents a risk factor for psychosis, our results shows an association of the “C” allele at rs1344706 with impulsivity in chronic schizophrenia patients. The difference in our findings when compared to previous reports may have to do with the differing ethnic distribution of our population, which is predominantly African American. This finding could be of nosological value for biological subtyping across the spectrum of schizophrenia, although important limitations should be noted such as small sample size and lack of ethnic diversity of our population.

Dataset Information

No association of ZNF804A rs1344706 with white matter integrity in schizophrenia: a tract-based spatial statistics study.

Publications

No association of ZNF804A rs1344706 with white matter integrity in schizophrenia: a tract-based spatial statistics study.

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