Effects of a novel schizophrenia risk variant rs7914558 at CNNM2 on brain structure and attributional style

Emma Jane Rose, April Hargreaves, Derek Morris, Ciara Fahey, Daniela Tropea, Elizabeth Cummings, Carlo Caltagirone, Paola Bossù, Chiara Chiapponi, Fabrizio Piras, Gianfranco Spalletta, Michael Gill, Aiden Corvin, Gary Donohoe

Research output: Contribution to journalArticle

17 Scopus citations

Abstract

Background: A single nucleotide polymorphism (rs7914558) within the cyclin M2 (CNNM2) gene was recently identified as a common risk variant for schizophrenia. The mechanism by which CNNM2 confers risk is unknown. Aims: To determine the impact of the rs7914558 risk 'A' allele on measures of neurocognition, social cognition and brain structure. Method: Patients with schizophrenia (n = 400) and healthy controls (n = 160) completed measures of neuropsychological function and social cognition. Structural magnetic resonance imaging data were also acquired from an overlapping sample of Irish healthy controls (n = 159) and an independent sample of Italian patients (n = 82) and healthy controls (n = 39). Results: No effects of genotype on neuropsychological test performance were observed. However, a dosage effect of the risk allele was found for an index of social cognition (i.e. attributional style), such that risk status was associated with reduced self-serving bias across groups (GG>AG>AA, P<0.05). Using voxel-based morphometry to investigate neuroanatomical regions putatively supporting social cognition, risk carriers had relatively increased grey matter volume in the right temporal pole and right anterior cingulate cortex (Pcorrected<0.05) in the Irish healthy controls sample; neuroanatomical associations between CNNM2 and grey matter volume in anterior cingulate cortex were also observed in the Italian schizophrenia and healthy controls samples. Conclusions: Although the biological role of CNNM2 in schizophrenia remains unknown, these data suggest that this CNNM2 risk variant rs7914558 may have an impact on neural systems relevant to social cognition. How such effects may mediate the relationship between genotype and disease risk remains to be established.

Original languageEnglish (US)
Pages (from-to)115-121
Number of pages7
JournalBritish Journal of Psychiatry
Volume204
Issue number2
DOIs
StatePublished - Feb 1 2014

All Science Journal Classification (ASJC) codes

  • Psychiatry and Mental health

Fingerprint Dive into the research topics of 'Effects of a novel schizophrenia risk variant rs7914558 at CNNM2 on brain structure and attributional style'. Together they form a unique fingerprint.

  • Cite this

    Rose, E. J., Hargreaves, A., Morris, D., Fahey, C., Tropea, D., Cummings, E., Caltagirone, C., Bossù, P., Chiapponi, C., Piras, F., Spalletta, G., Gill, M., Corvin, A., & Donohoe, G. (2014). Effects of a novel schizophrenia risk variant rs7914558 at CNNM2 on brain structure and attributional style. British Journal of Psychiatry, 204(2), 115-121. https://doi.org/10.1192/bjp.bp.113.131359