ArticlebioRxiv : the preprint server for biology2025
Differential methylation clock ages across buffy coat (BC), peripheral blood mononuclear cells (PBMC), and saliva in individuals approaching midlife.
Article in bioRxiv : the preprint server for biology, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Understanding epigenetic aging prior to midlife is gaining interest as a potentially intervenable period to address factors that influence health and cognitive aging. Epigenetic changes associated with aging may point to differential biological aging rates; however, methylation profiles may not be substitutable across tissues. We compared DNA methylation in three tissues collected in 91 siblings and twins from the Colorado Adoption/Twin Study of Lifespan behavioral development and cognitive aging (CATSLife1): saliva, buffy coat (BC), and peripheral blood mononuclear cells (PBMC). Overall, across five methylation clocks and two blood-derived and one saliva-derived tissues, moderate to strong associations between chronological age and methylation ages were observed. Moreover, PBMC methylation age values correlate more strongly with BC values (Spearman
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