| Literature DB >> 30617256 |
Iris E Jansen1,2, Jeanne E Savage1, Stephan Ripke3,4,5, Ole A Andreassen6,7, Danielle Posthuma8,9, Kyoko Watanabe1, Julien Bryois10, Dylan M Williams10, Stacy Steinberg11, Julia Sealock12, Ida K Karlsson10,13, Sara Hägg10, Lavinia Athanasiu6,14, Nicola Voyle15, Petroula Proitsi15, Aree Witoelar6,7, Sven Stringer1, Dag Aarsland15,16, Ina S Almdahl17,18,19, Fred Andersen20, Sverre Bergh21,22, Francesco Bettella6,7, Sigurbjorn Bjornsson23, Anne Brækhus21,24, Geir Bråthen25,26, Christiaan de Leeuw1, Rahul S Desikan27, Srdjan Djurovic6,28, Logan Dumitrescu29,30, Tormod Fladby17,18, Timothy J Hohman29,30, Palmi V Jonsson23,31, Steven J Kiddle32, Arvid Rongve33,34, Ingvild Saltvedt25,35, Sigrid B Sando25,26, Geir Selbæk21,36, Maryam Shoai37, Nathan G Skene38,39, Jon Snaedal23, Eystein Stordal40,41, Ingun D Ulstein42, Yunpeng Wang6,7, Linda R White25,26, John Hardy37, Jens Hjerling-Leffler38, Patrick F Sullivan10,43,44, Wiesje M van der Flier2, Richard Dobson15,45,46,47, Lea K Davis30,48, Hreinn Stefansson11, Kari Stefansson11, Nancy L Pedersen10.
Abstract
Alzheimer's disease (AD) is highly heritable and recent studies have identified over 20 disease-associated genomic loci. Yet these only explain a small proportion of the genetic variance, indicating that undiscovered loci remain. Here, we performed a large genome-wide association study of clinically diagnosed AD and AD-by-proxy (71,880 cases, 383,378 controls). AD-by-proxy, based on parental diagnoses, showed strong genetic correlation with AD (rg = 0.81). Meta-analysis identified 29 risk loci, implicating 215 potential causative genes. Associated genes are strongly expressed in immune-related tissues and cell types (spleen, liver, and microglia). Gene-set analyses indicate biological mechanisms involved in lipid-related processes and degradation of amyloid precursor proteins. We show strong genetic correlations with multiple health-related outcomes, and Mendelian randomization results suggest a protective effect of cognitive ability on AD risk. These results are a step forward in identifying the genetic factors that contribute to AD risk and add novel insights into the neurobiology of AD.Entities:
Mesh:
Year: 2019 PMID: 30617256 PMCID: PMC6836675 DOI: 10.1038/s41588-018-0311-9
Source DB: PubMed Journal: Nat Genet ISSN: 1061-4036 Impact factor: 38.330