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Bidirectional relationship between epigenetic age and stroke, dementia, and late-life depression
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Bidirectional relationship between epigenetic age and stroke, dementia, and late-life depression
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Bidirectional relationship between epigenetic age and stroke, dementia, and late-life depression
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Journal Article
Bidirectional relationship between epigenetic age and stroke, dementia, and late-life depression
2025
Overview
Chronological age is an imperfect estimate of molecular aging. Epigenetic age, derived from DNA methylation data, provides a more nuanced representation of aging-related biological processes. We examine the bidirectional relationship between epigenetic age and brain health events (stroke, dementia, late-life depression) using data from 4,018 participants. Participants with a prior brain health event are 4% epigenetically older (β = 0.04, SE = 0.01), indicating these conditions are associated with accelerated aging beyond that captured by chronological age. Additionally, a one standard deviation increase in epigenetic age is associated with 70% higher odds of experiencing a brain health event in the next four years (OR = 1.70, 95% CI = 1.16–2.50), suggesting epigenetic age acceleration is not just a consequence but also a predictor of poor brain health. Mendelian Randomization analyses replicate these findings, supporting their causal nature. Our results support using epigenetic age as a biomarker to evaluate interventions aimed at preventing and promoting recovery after brain health events.
Here, the authors examine the bidirectional relationship between epigenetic age and brain health events, suggesting that stroke and dementia accelerate our epigenetic age, while an accelerated epigenetic age increases the risk of these conditions.
