Epigenome-wide association study of loneliness in a sample of U.S. middle-aged twins.

IF 2.9 3区 生物学 Q3 BIOCHEMISTRY & MOLECULAR BIOLOGY
Epigenetics Pub Date : 2024-12-01 Epub Date: 2024-12-08 DOI:10.1080/15592294.2024.2427999
Christopher R Beam, Kelly M Bakulski, Ebrahim Zandi, Eric Turkheimer, Morgan Lynch, Alaina I Gold, Thalida Em Arpawong, Sophie A Bell, Alyssa C Kam, Jonathan Becker, Deborah Winders Davis
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引用次数: 0

Abstract

Loneliness is a complex human trait that is highly polygenic and found to affect gene expression related to inflammatory and immunological functioning. To date, no epigenome-wide association studies of loneliness have tested whether differentially methylated sites are annotated to genes associated with inflammatory and immunological processes. Using 281 individual adult twins' DNA methylation data from the Louisville Twin Study, we performed an epigenome-wide analysis of loneliness to address this gap in the literature. In the discovery analysis, 169 twins were used to prioritize probes and test associations with DNA methylation age acceleration, and 56 independent monozygotic (MZ) twin pairs (112 individuals) were used in a within-family replication analysis. Among the 837,274 sites analyzed, no probe sites were statistically significant at the genome-wide level (p < 5.97 × 10-8), but 25 suggestive sites (p < 5 × 10-5) were annotated to genes related to various biological processes, including inflammatory response and protein-binding functions that extend prior findings. The nominal associations at these suggestive probe sites were highly correlated (r = .72) between the discovery sample and the MZ pair replication sample. Finally, loneliness significantly correlated with the DunedinPACE DNA methylation measure, suggesting that higher levels of loneliness were associated with accelerated epigenetic age as quantified by a measure that indexes longitudinal changes across multiple organ systems.

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来源期刊
Epigenetics
Epigenetics 生物-生化与分子生物学
CiteScore
6.80
自引率
2.70%
发文量
82
审稿时长
3-8 weeks
期刊介绍: Epigenetics publishes peer-reviewed original research and review articles that provide an unprecedented forum where epigenetic mechanisms and their role in diverse biological processes can be revealed, shared, and discussed. Epigenetics research studies heritable changes in gene expression caused by mechanisms others than the modification of the DNA sequence. Epigenetics therefore plays critical roles in a variety of biological systems, diseases, and disciplines. Topics of interest include (but are not limited to): DNA methylation Nucleosome positioning and modification Gene silencing Imprinting Nuclear reprogramming Chromatin remodeling Non-coding RNA Non-histone chromosomal elements Dosage compensation Nuclear organization Epigenetic therapy and diagnostics Nutrition and environmental epigenetics Cancer epigenetics Neuroepigenetics
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