The effects of a neuregulin 1 variant on white matter density and integrity

A. M. McIntosh, T. W. Moorhead, D. Job, G. K. Lymer, S. Munoz Maniega, J. McKirdy, J. E. Sussmann, Ben Baig, M. E. Bastin, D. Porteous, K. L. Evans, E. C. Johnstone, S. M. Lawrie, J. Hall

Research output: Contribution to journalArticlepeer-review


Theories of abnormal anatomical and functional connectivity in schizophrenia and bipolar disorder are supported by evidence from functional magnetic resonance imaging (MRI), structural MRI and diffusion tensor imaging (DTI). The presence of similar abnormalities in unaffected relatives suggests such disconnectivity is genetically mediated, albeit through unspecified loci. Neuregulin 1 (NRG1) is a psychosis susceptibility gene with effects on neuronal migration, axon guidance and myelination that could potentially explain these findings. In the current study, unaffected subjects were genotyped at the NRG1 single nucleotide polymorphism (SNP) rs6994992 (SNP8NRG243177) locus, previously associated with increased risk for psychosis, and the effect of genetic variation at this locus on white matter density (T(1)-weighted MRI) and integrity (DTI) was ascertained. Subjects with the risk-associated TT genotype had reduced white matter density in the anterior limb of the internal capsule and evidence of reduced structural connectivity in the same region using DTI. We therefore provide the first imaging evidence that genetic variation in NRG1 is associated with reduced white matter density and integrity in human subjects. This finding is discussed in the context of NRG1 effects on neuronal migration, axon guidance and myelination.
Original languageEnglish
Pages (from-to)1054-1059
Number of pages6
JournalMolecular Psychiatry
Issue number11
Early online date9 Oct 2007
Publication statusPublished - Nov 2008


  • schizophrenia
  • bipolar disorder
  • MRI


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