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The genetic architecture of appendicular lean mass characterized by association analysis in the UK Biobank study.


ABSTRACT: Appendicular lean mass (ALM) is a heritable trait associated with loss of lean muscle mass and strength, or sarcopenia, but its genetic determinants are largely unknown. Here we conducted a genome-wide association study (GWAS) with 450,243 UK Biobank participants to uncover its genetic architecture. A total of 1059 conditionally independent variants from 799 loci were identified at the genome-wide significance level (p?-9), all of which were also significant at p?-5 in both sexes. These variants explained ~15.5% of the phenotypic variance, accounting for more than one quarter of the total ~50% GWAS-attributable heritability. There was no difference in genetic effect between sexes or among different age strata. Heritability was enriched in certain functional categories, such as conserved and coding regions, and in tissues related to the musculoskeletal system. Polygenic risk score prediction well distinguished participants with high and low ALM. The findings are important not only for lean mass but also for other complex diseases, such as type 2 diabetes, as ALM is shown to be a protective factor for type 2 diabetes.

SUBMITTER: Pei YF 

PROVIDER: S-EPMC7585446 | biostudies-literature | 2020 Oct

REPOSITORIES: biostudies-literature

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The genetic architecture of appendicular lean mass characterized by association analysis in the UK Biobank study.

Pei Yu-Fang YF   Liu Yao-Zhong YZ   Yang Xiao-Lin XL   Zhang Hong H   Feng Gui-Juan GJ   Wei Xin-Tong XT   Zhang Lei L  

Communications biology 20201023 1


Appendicular lean mass (ALM) is a heritable trait associated with loss of lean muscle mass and strength, or sarcopenia, but its genetic determinants are largely unknown. Here we conducted a genome-wide association study (GWAS) with 450,243 UK Biobank participants to uncover its genetic architecture. A total of 1059 conditionally independent variants from 799 loci were identified at the genome-wide significance level (p < 5 × 10<sup>-9</sup>), all of which were also significant at p < 5 × 10<sup>  ...[more]

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