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• W2898498517 abstract "Abstract Background The skew in distribution of handedness is a uniquely human trait, and has fascinated researchers for centuries. The heritability of handedness is estimated at 25%, but defining genetic variants contributing to this trait has so far proved elusive. Methods We performed GWAS of self-reported handedness in UK Biobank, a prospective cohort study of ∼500,000 individuals. Furthermore, we investigated correlations between our associated SNPs and brain imaging-derived phenotypes (IDPs) from >9,000 individuals in UK Biobank, as well as between self-reported handedness and IDPs. Results Our association study of 38,322 left-handers vs 356,567 right-handers (excluding ambidextrous participants) revealed three genome-wide significant loci (rs199512, 17q21.31, p=4.1x10 −9 ; rs45608532, 22q11.22, p=1.4x10 −8 ; rs13017199, 2q34, p=3.3x10 −8 ). In the imaging study, we found strong associations between rs199512 and diffusion MRI measures mainly in white matter tracts connecting language-related brain regions (p<2.0x10 −6 ). Direct investigation between handedness and IDPs revealed numerous associations with functional connectivity between the same language-related areas of the brain. A second GWAS of non-right handers (n=44,631) vs right-handers (n=356,567) revealed an additional locus: rs3094128, 6p21.33, p=2.9x10 −8 . Three of the four associated loci (2q34, 17q21.31, 6p21.33) contain genes that encode microtubule-related proteins that are highly expressed in the brain: MAP2, MAPT and TUBB . These genes are strongly implicated in the pathogenesis of diseases that are known to affect an excess of left-handed people, including schizophrenia. Conclusions This is the first GWAS to identify genome-wide significant loci for human handedness in the general population, and the genes at these loci have biological plausibility in contributing to neurodevelopmental lateralization of brain organisation, which appears to predispose both to left-handedness and to certain neurodegenerative and psychiatric diseases." @default.
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• W2898498517 date "2018-10-26" @default.
• W2898498517 modified "2023-09-25" @default.
• W2898498517 title "Human Handedness: Genetics, Microtubules, Neuropsychiatric Diseases and Brain Language Areas" @default.
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• W2898498517 doi "https://doi.org/10.1101/454660" @default.
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