Abstract
OCD is characterised by recurrent obsessions and compulsions that result in severe distress and increased risk for comorbidity. Recently published findings have indicated that the neuronal cadherin gene (CDH2) plays a role in the development of canine OCD, and led us to investigate the human ortholog, CDH2, in a human OCD cohort. Seven CDH2 polymorphisms were selected and genotyped in a South African Caucasian cohort of 234 OCD patients and 180 healthy controls using TaqMan assays. Polymorphisms were analysed in a single-locus and haplotypic context. Of the seven polymorphisms, two reached statistical significance for OCD under additive and codominant models of inheritance (rs1120154 and rs12605662). CDH2 SNP, rs1120154, C-allele carriers were found to be significantly associated with lower risk to develop OCD compared to TT-homozygotes (OR = 0.49; 95 % CI: 0.32–0.75; p < 0.001), and rs12605662 G-allele carriers were significantly associated with reduced risk OCD compared to TT-homozygotes (OR = 0.46; 95 % CI: 0.30–0.71; p < 0.001), Furthermore, a single haplotype was found to infer an increased risk for OCD diagnosis (*rs8087457-rs1148374: A-T). Polymorphisms within the CDH2 gene are associated with susceptibility to OCD in a South African cohort.
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We would like to acknowledge the National Research Foundation (NRF) for funding.
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McGregor, N.W., Lochner, C., Stein, D.J. et al. Polymorphisms within the neuronal cadherin (CDH2) gene are associated with obsessive-compulsive disorder (OCD) in a South African cohort. Metab Brain Dis 31, 191–196 (2016). https://doi.org/10.1007/s11011-015-9693-x
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DOI: https://doi.org/10.1007/s11011-015-9693-x