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Nature Research, Nature Medicine, 10(17), p. 1199-1199, 2011

DOI: 10.1038/nm.2524

Nature Research, Nature Genetics, 10(43), p. 977-983

DOI: 10.1038/ng.943

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Large-scale genome-wide association analysis of bipolar disorder identifies a new susceptibility locus near ODZ4.

Journal article published in 2011 by Urban Ösby, Pamela Sklar, Stephan Ripke, Laura J. Scott, Ole A. Andreassen ORCID, Sven Cichon, Nick Craddock, Thornorgeir Thornorgeirsson, Howard J. Edenberg ORCID, John I. Nurnberger, Marcella Rietschel, Douglas Blackwood, Aiden Corvin, Matthew Flickinger, Thomas F. Wienker and other authors.
This paper is made freely available by the publisher.
This paper is made freely available by the publisher.

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Data provided by SHERPA/RoMEO

Abstract

We conducted a combined genome-wide association study (GWAS) of 7,481 individuals with bipolar disorder (cases) and 9,250 controls as part of the Psychiatric GWAS Consortium. Our replication study tested 34 SNPs in 4,496 independent cases with bipolar disorder and 42,422 independent controls and found that 18 of 34 SNPs had P < 0.05, with 31 of 34 SNPs having signals with the same direction of effect (P = 3.8 x 10(-7)). An analysis of all 11,974 bipolar disorder cases and 51,792 controls confirmed genome-wide significant evidence of association for CACNA1C and identified a new intronic variant in ODZ4. We identified a pathway comprised of subunits of calcium channels enriched in bipolar disorder association intervals. Finally, a combined GWAS analysis of schizophrenia and bipolar disorder yielded strong association evidence for SNPs in CACNA1C and in the region of NEK4-ITIH1-ITIH3-ITIH4. Our replication results imply that increasing sample sizes in bipolar disorder will confirm many additional loci.