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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

C18orf1 located on chromosome 18p11.2 may confer susceptibility to schizophrenia.

The pericentromeric region of chromosome 18, especially 18p11.2, is described as a schizophrenia susceptibility locus. We had previously cloned two novel brain-derived transcripts from this region: the gene for a second human myo-inositol monophosphatase ( IMPA2) and a gene of unknown function, C18orf1. Recently, we reported a distortion of transmission of the tandem repeat marker D18S852, embedded in the 3'-untranslated region of C18orf1, in schizophrenia, using a family-based association test. A subsequent case-control study also revealed a significant association between the haplotype constructed from D18S852 and the 6409T>C polymorphism located in C18orf1 and schizophrenia. In the present study, we screened the C18orf1 gene for mutations and identified a novel single nucleotide polymorphism (SNP), -96T>C in exon 2. This SNP showed significant genotypic (P = 0.048) and allelic association (P = 0.005) with schizophrenia in a case-control study. The distributions of haplotypes defined by D18S852 and -96T>C were different between control and schizophrenia groups (P = 0.021). These findings suggest that C18orf1 or a gene nearby may contribute to the overall genetic risk for schizophrenia.[1]


  1. C18orf1 located on chromosome 18p11.2 may confer susceptibility to schizophrenia. Kikuchi, M., Yamada, K., Toyota, T., Yoshikawa, T. J. Med. Dent. Sci. (2003) [Pubmed]
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