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Genetic effects influencing risk for major depressive disorder in China and Europe

Bigdeli, T B, Ripke, S, Peterson, R E, Trzaskowski, M, Bacanu, S-A, Abdellaoui, A, Andlauer, T F M, Beekman, A T F, Berger, K, Blackwood, D H R, Boomsma, D I, Breen, G, Buttenschøn, H N, Byrne, E M, Cichon, S, Clarke, T-K, Couvy-Duchesne, B, Craddock, Nicholas, de Geus, E J C, Degenhardt, F, Dunn, E C, Edwards, A C, Fanous, A H, Forstner, A J, Frank, J, Gill, M, Gordon, S D, Grabe, H J, Hamilton, S P, Hardiman, O, Hayward, C, Heath, A C, Henders, A K, Herms, S, Hickie, I B, Hoffmann, P, Homuth, G, Hottenga, J-J, Ising, M, Jansen, R, Kloiber, S, Knowles, J A, Lang, M, Li, Q S, Lucae, S, MacIntyre, D J, Madden, P A F, Martin, N G, McGrath, P J, McGuffin, P, McIntosh, A M, Medland, S E, Mehta, D, Middeldorp, C M, Milaneschi, Y, Montgomery, G W, Mors, O, Müller-Myhsok, B, Nauck, M, Nyholt, D R, Nöthen, M M, Owen, Michael, Penninx, B W J H, Pergadia, M L, Perlis, R H, Peyrot, W J, Porteous, D J, Potash, J B, Rice, J P, Rietschel, M, Riley, B P, Rivera, M, Schoevers, R, Schulze, T G, Shi, J, Shyn, S I, Smit, J H, Smoller, J W, Streit, F, Strohmaier, J, Teumer, A, Treutlein, J, Van der Auwera, S, van Grootheest, G, van Hemert, A M, Völzke, H, Webb, B T, Weissman, M M, Wellmann, J, Willemsen, G, Witt, S H, Levinson, D F, Lewis, C M, Wray, N R, Flint, J, Sullivan, P F and Kendler, K S 2017. Genetic effects influencing risk for major depressive disorder in China and Europe. Translational Psychiatry 7 (3) , e1074. 10.1038/tp.2016.292

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Major depressive disorder (MDD) is a common, complex psychiatric disorder and a leading cause of disability worldwide. Despite twin studies indicating its modest heritability (~30–40%), extensive heterogeneity and a complex genetic architecture have complicated efforts to detect associated genetic risk variants. We combined single-nucleotide polymorphism (SNP) summary statistics from the CONVERGE and PGC studies of MDD, representing 10 502 Chinese (5282 cases and 5220 controls) and 18 663 European (9447 cases and 9215 controls) subjects. We determined the fraction of SNPs displaying consistent directions of effect, assessed the significance of polygenic risk scores and estimated the genetic correlation of MDD across ancestries. Subsequent trans-ancestry meta-analyses combined SNP-level evidence of association. Sign tests and polygenic score profiling weakly support an overlap of SNP effects between East Asian and European populations. We estimated the trans-ancestry genetic correlation of lifetime MDD as 0.33; female-only and recurrent MDD yielded estimates of 0.40 and 0.41, respectively. Common variants downstream of GPHN achieved genome-wide significance by Bayesian trans-ancestry meta-analysis (rs9323497; log10 Bayes Factor = 8.08) but failed to replicate in an independent European sample (P = 0.911). Gene-set enrichment analyses indicate enrichment of genes involved in neuronal development and axonal trafficking. We successfully demonstrate a partially shared polygenic basis of MDD in East Asian and European populations. Taken together, these findings support a complex etiology for MDD and possible population differences in predisposing genetic factors, with important implications for future genetic studies.

Item Type: Article
Date Type: Published Online
Status: Published
Schools: MRC Centre for Neuropsychiatric Genetics and Genomics (CNGG)
Subjects: B Philosophy. Psychology. Religion > BF Psychology
R Medicine > R Medicine (General)
Publisher: Nature Publishing Group
ISSN: 2158-3188
Date of First Compliant Deposit: 27 April 2017
Date of Acceptance: 27 November 2016
Last Modified: 21 Jun 2022 07:10

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