Early-Life Adversity Imprints the Body’s Epigenome Without Uniformly Speeding Aging

Overview

• A multi-institution team published a Science study showing that DNA methylation from 12 tissues can predict age to about one year and reveal how aging and experience shape the epigenome.
• Researchers analyzed 12 adult tissues from 237 free-ranging rhesus macaques from Cayo Santiago and built precise tissue-specific epigenetic clocks for cross-tissue comparison.
• Thousands of genomic regions were linked to early-life adversities such as maternal loss, low maternal rank, and crowding, and those changes tended to be coordinated across multiple tissues.
• Many adversity-associated methylation sites overlap regions affected by aging, but the direction of change is inconsistent, so adversity does not simply accelerate biological aging across the body.
• The results show blood samples miss much of this complexity and point to the need for multi-tissue, longitudinal and mechanistic studies to connect childhood conditions to later health; the work was supported by NIH, NSF and foundations.