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Sheerin, Christina M; O'Hara-Payne, Rowan K; Lancaster, Eva E; Suarez-Rivas, Hailie; Chatzinakos, Chris; Prom-Wormley, Elizabeth C; Peterson, Roseann E
Frontiers in genetics, 02/2024, Letnik: 14Journal Article
Genetic factors impact alcohol consumption and use disorder (AUD), with large-scale genome-wide association studies (GWAS) identifying numerous associated variants. Aggregate genetic methods in combination with important environmental factors (e.g., interpersonal trauma IPT) can be applied to expand our understanding of the ways by which genetic and environmental variables work together to influence alcohol consumption and disordered use. The present study aimed to detail the relationships between genome-wide polygenic scores (PGS) for alcohol phenotypes (i.e., alcohol consumption and AUD status) and IPT exposure as well as the interaction between them across ancestry. Data were drawn from the Spit for Science (S4S) study, a US college student population, where participants reported on IPT exposure prior to college and alcohol consumption and problems during college (N = 9,006; ancestry: 21.3% African AFR, 12.5% Admixed Americas AMR, 9.6% East Asian EAS, 48.1% European EUR, 8.6% South Asian SAS). Two trans-ancestry PGS were constructed, one for alcohol consumption and another for AUD, using large-scale GWAS summary statistics from multiple ancestries weighted using PRS-CSx. Regression models were applied to test for the presence of associations between alcohol-PGS and IPT main and interaction effects. In the meta-analysis across ancestry groups, IPT exposure and PGS were significantly associated with alcohol consumption (β = 0.31, = 0.0002; β = 0.09, = 0.004) and AUD (OR = 1.12, = 3.5 × 10 ; OR = 1.02, = 0.002). No statistically significant interactions were detected between IPT and sex nor between IPT and PGS. When inspecting ancestry specific results, the alcohol consumption-PGS and AUD-PGS were only statistically significant in the EUR ancestry group (β = 0.09, = 0.04; OR = 1.02, = 0.022, respectively). IPT exposure prior to college was strongly associated with alcohol outcomes in this college-age sample, which could be used as a preventative measure to identify students at high risk for problematic alcohol use. Additionally, results add to developing evidence of polygenic score association in meta-analyzed samples, highlighting the importance of continued efforts to increase ancestral representation in genetic studies and inclusive analytic approaches to increase the generalizability of results from genetic association studies.
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JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
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