Large-Scale Cognitive GWAS Meta-Analysis Reveals Tissue-Specific Neural Expression and Potential Nootropic Drug Targets
- PMID: 29186694
- PMCID: PMC5789458
- DOI: 10.1016/j.celrep.2017.11.028
Large-Scale Cognitive GWAS Meta-Analysis Reveals Tissue-Specific Neural Expression and Potential Nootropic Drug Targets
Abstract
Here, we present a large (n = 107,207) genome-wide association study (GWAS) of general cognitive ability ("g"), further enhanced by combining results with a large-scale GWAS of educational attainment. We identified 70 independent genomic loci associated with general cognitive ability. Results showed significant enrichment for genes causing Mendelian disorders with an intellectual disability phenotype. Competitive pathway analysis implicated the biological processes of neurogenesis and synaptic regulation, as well as the gene targets of two pharmacologic agents: cinnarizine, a T-type calcium channel blocker, and LY97241, a potassium channel inhibitor. Transcriptome-wide and epigenome-wide analysis revealed that the implicated loci were enriched for genes expressed across all brain regions (most strongly in the cerebellum). Enrichment was exclusive to genes expressed in neurons but not oligodendrocytes or astrocytes. Finally, we report genetic correlations between cognitive ability and disparate phenotypes including psychiatric disorders, several autoimmune disorders, longevity, and maternal age at first birth.
Keywords: GWAS; calcium channel; cerebellum; gene expression; general cognitive ability; neurodevelopment; nootropics; potassium channel; synapse.
Copyright © 2017 The Author(s). Published by Elsevier Inc. All rights reserved.
Conflict of interest statement
The authors declare no conflict of interest.
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Comment in
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Comment on 'Large-Scale Cognitive GWAS Meta-Analysis Reveals Tissue-Specific Neural Expression and Potential Nootropic Drug Targets' by Lam et al.Twin Res Hum Genet. 2018 Apr;21(2):84-88. doi: 10.1017/thg.2018.12. Epub 2018 Mar 19. Twin Res Hum Genet. 2018. PMID: 29551100
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Multi-Trait Analysis of GWAS and Biological Insights Into Cognition: A Response to Hill (2018).Twin Res Hum Genet. 2018 Oct;21(5):394-397. doi: 10.1017/thg.2018.46. Epub 2018 Jul 13. Twin Res Hum Genet. 2018. PMID: 30001766
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A Further Comment on 'Large-Scale Cognitive GWAS Meta-Analysis Reveals Tissue-Specific Neural Expression and Potential Nootropic Drug Targets' by Lam et al.Twin Res Hum Genet. 2018 Dec;21(6):538-545. doi: 10.1017/thg.2018.55. Epub 2018 Oct 8. Twin Res Hum Genet. 2018. PMID: 30293537 Free PMC article.
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