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Genome-wide association study reveals two new risk loci for bipolar disorder
Thomas W Mühleisen1, Markus Leber2, Thomas G Schulze3
11] Institute of Human Genetics, University of Bonn, D-53127 Bonn, Germany [2] Department of Genomics, Life & Brain Center, University of Bonn, D-53127 Bonn, Germany [3] Institute of Neuroscience and Medicine (INM-1), Research Centre Jülich, D-52425 Jülich, Germany [4].
Abstract:
Bipolar disorder (BD) is a common and highly heritable mental illness and genome-wide association studies (GWAS) have robustly identified the first common genetic variants involved in disease aetiology. The data also provide strong evidence for the presence of multiple additional risk loci, each contributing a relatively small effect to BD susceptibility. Large samples are necessary to detect these risk loci. Here we present results from the largest BD GWAS to date by investigating 2.3 million single-nucleotide polymorphisms (SNPs) in a sample of 24,025 patients and controls. We detect 56 genome-wide significant SNPs in five chromosomal regions including previously reported risk loci ANK3, ODZ4 and TRANK1, as well as the risk locus ADCY2 (5p15.31) and a region between MIR2113 and POU3F2 (6q16.1). ADCY2 is a key enzyme in cAMP signalling and our finding provides new insights into the biological mechanisms involved in the development of BD.
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