Understanding And Making Sense Of Epigenetic Age Misalignment Across Different Aging Clocks
Have you ever wondered how old your body truly is, beyond your chronological age? Scientists use “epigenetic clocks” to estimate biological age by looking at patterns of DNA methylation, a natural process that influences gene activity and changes as we get older. These clocks are powerful tools, but a recent analysis highlights an important consideration: not all clocks tell the same time.
It turns out that the estimated biological age for a single person can vary significantly depending on which epigenetic clock is used. These differences, sometimes as large as 45 years, stem from various factors, including how each clock was trained, the specific technologies used, and even the types of cells analyzed. For instance, a clock trained on blood samples might give a different reading than one designed for cheek swabs.
This “misalignment” means that interpreting the results from these clocks requires careful thought. It impacts how we choose the right clock for a specific purpose, how we understand the effects of interventions aimed at slowing aging, and how we track an individual’s biological age over time. Understanding these variations is crucial for accurately using these innovative tools in the quest to understand and promote healthy aging.
Source: link to paper