4.8 Article

Complex effects of sequence variants on lipid levels and coronary artery disease

Journal

CELL
Volume 186, Issue 19, Pages 4085-+

Publisher

CELL PRESS
DOI: 10.1016/j.cell.2023.08.012

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Sequence variants have both additive and non-additive effects on blood lipid levels, and interact with each other to affect lipid levels, variance, and correlations. These complex effects can translate into risk of coronary artery disease (CAD).
Many sequence variants have additive effects on blood lipid levels and, through that, on the risk of coronary artery disease (CAD). We show that variants also have non-additive effects and interact to affect lipid levels as well as affecting variance and correlations. Variance and correlation effects are often signatures of epistasis or gene-environmental interactions. These complex effects can translate into CAD risk. For example, Trp154Ter in FUT2 protects against CAD among subjects with the A1 blood group, whereas it associates with greater risk of CAD in others. His48Arg in ADH1B interacts with alcohol consumption to affect lipid levels and CAD. The effect of variants in TM6SF2 on blood lipids is greatest among those who never eat oily fish but absent from those who often do. This work demonstrates that variants that affect variance of quantitative traits can allow for the discovery of epistasis and interactions of variants with the environment.

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