G. Bragi Walters

Aug 27, 2024 | nature.com | Asmundur Oddsson |Valgerdur Steinthorsdottir |Gudjon R. Oskarsson |Unnur Styrkarsdottir |Gísli H. Halldórsson |Gardar Sveinbjornsson | +22 more

AbstractAge at menopause (AOM) has a substantial impact on fertility and disease risk. While many loci with variants that associate with AOM have been identified through genome-wide association studies (GWAS) under an additive model, other genetic models are rarely considered1. Here through GWAS meta-analysis under the recessive model of 174,329 postmenopausal women from Iceland, Denmark, the United Kingdom (UK; UK Biobank) and Norway, we study low-frequency variants with a large effect on AOM.

Jul 16, 2024 | nature.com | Jinjie Duan |Daniel F Levey |G. Bragi Walters |Emma Johnson |Arpana Agrawal |Joel Gelernter | +2 more

AbstractCannabis use disorder (CUD) and cannabis use (CU) are prevalent conditions co-occurring with attention-deficit hyperactivity disorder (ADHD). Here we report results from a cross-disorder genome-wide association study of ADHD and CUD or CU. We identified 36 concordant genome-wide significant loci for ADHD–CUD and ten loci for ADHD–CU. DRD2 was identified as an ADHD–CUD risk gene.

Oct 26, 2023 | nature.com | Gyda Bjornsdottir |Mona A. Chalmer |Astros Th. Skuladottir |Gudmundur Einarsson |Egil Ferkingstad |Solveig Gretarsdottir | +27 more

AbstractMigraine is a complex neurovascular disease with a range of severity and symptoms, yet mostly studied as one phenotype in genome-wide association studies (GWAS). Here we combine large GWAS datasets from six European populations to study the main migraine subtypes, migraine with aura (MA) and migraine without aura (MO). We identified four new MA-associated variants (in PRRT2, PALMD, ABO and LRRK2) and classified 13 MO-associated variants.

Jul 18, 2023 | nature.com | Thomas D. Als |Jakob Grove |Georgios Voloudakis |Karen Therrien |Joonas Naamanka |Daniel F Levey | +15 more

AbstractDepression is a common psychiatric disorder and a leading cause of disability worldwide. Here we conducted a genome-wide association study meta-analysis of six datasets, including >1.3 million individuals (371,184 with depression) and identified 243 risk loci. Overall, 64 loci were new, including genes encoding glutamate and GABA receptors, which are targets for antidepressant drugs.

Jul 3, 2023 | nature.com | Asmundur Oddsson |Patrick Sulem |Gardar Sveinbjornsson |Gudny A. Arnadottir |Valgerdur Steinthorsdottir |Gísli H. Halldórsson | +41 more

Author notesThese authors contributed equally: Asmundur Oddsson, Patrick Sulem. These authors jointly supervised this work: Kari Stefansson, Daniel F. Gudbjartsson. Authors and AffiliationsdeCODE genetics/Amgen, Inc., Reykjavik, IcelandAsmundur Oddsson, Patrick Sulem, Gardar Sveinbjornsson, Gudny A. Arnadottir, Valgerdur Steinthorsdottir, Gisli H. Halldorsson, Bjarni A. Atlason, Gudjon R. Oskarsson, Hannes Helgason, Hildigunnur Katrinardottir, Run Fridriksdottir, Brynjar O.