Objective: To investigate the genetic association for schizophrenia within the long arm region 1 band 1 of chromosome 22 (22q11) in a Han Chinese population.
Methods: Polymerase chain reaction (PCR)-based restriction fragment length polymorphism (RFLP) analysis was used to detect three single nucleotide polymorphism (SNPs), rs165655 (A/G base change) and rs165815 (C/T base change) present in the ARVCF (armadillo repeat gene deletion in velocardiofacial syndrome) locus, and rs756656 (A/C base change) in the LOC128979 (expressed sequence tags, EST) locus, among 100 nuclear families composed of fathers, mothers and affected offspring with schizophrenia. Genotyping data were analyzed by linkage disequilibrium methods including haplotype relative risk (HRR) analysis, transmission disequilibrium test (TDT) and haplotype transmission analysis.
Results: The genotype frequency distributions of three SNPs were all in Hardy-Weinberg equilibrium; Both HRR and TDT analysis showed that rs165815 was associated with schizophrenia (P < 0.05), whereas the other two SNPs did not show any allelic association. The haplotype transmission analysis showed a biased transmission for the rs165655-rs165815 haplotype system and for the rs756656-rs165655-rs165815 haplotype system (P < 0.01).
Conclusion: Either ARVCF gene itself or a nearby locus might confer susceptibility to schizophrenia in a Han Chinese population.
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