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• W3183562257 abstract "Background: Alzheimer’s disease (AD) and depression are debilitating brain disorders that are often comorbid. Shared brain mechanisms have been implicated, yet findings are inconsistent, reflecting the complexity of the underlying pathophysiology. As both disorders are (partly) heritable, characterising their genetic overlap may provide aetiological clues. While previous studies have indicated negligible genetic correlations, this study aims to expose the genetic overlap that may remain hidden due to mixed directions of effects. Methods: We applied Gaussian mixture modelling, through MiXeR, and conjunctional false discovery rate (cFDR) analysis, through pleioFDR, to genome-wide association study (GWAS) summary statistics of AD ( n = 79,145) and depression ( n = 450,619). The effects of identified overlapping loci on AD and depression were tested in 403,029 participants of the UK Biobank (UKB) (mean age 57.21, 52.0% female), and mapped onto brain morphology in 30,699 individuals with brain MRI data. Results: MiXer estimated 98 causal genetic variants overlapping between the 2 disorders, with 0.44 concordant directions of effects. Through pleioFDR, we identified a SNP in the TMEM106B gene, which was significantly associated with AD ( B = −0.002, p = 9.1 × 10 –4 ) and depression ( B = 0.007, p = 3.2 × 10 –9 ) in the UKB. This SNP was also associated with several regions of the corpus callosum volume anterior ( B &gt; 0.024, p &lt; 8.6 × 10 –4 ), third ventricle volume ventricle ( B = −0.025, p = 5.0 × 10 –6 ), and inferior temporal gyrus surface area ( B = 0.017, p = 5.3 × 10 –4 ). Discussion: Our results indicate there is substantial genetic overlap, with mixed directions of effects, between AD and depression. These findings illustrate the value of biostatistical tools that capture such overlap, providing insight into the genetic architectures of these disorders." @default.
• W3183562257 created "2021-08-02" @default.
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• W3183562257 date "2021-07-05" @default.
• W3183562257 modified "2023-10-05" @default.
• W3183562257 title "Genetic Overlap Between Alzheimer’s Disease and Depression Mapped Onto the Brain" @default.
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• W3183562257 doi "https://doi.org/10.3389/fnins.2021.653130" @default.
• W3183562257 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/8288283" @default.
• W3183562257 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/34290577" @default.
• W3183562257 hasPublicationYear "2021" @default.
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