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Identifying epigenetic aging moderators using the epigenetic pacemaker.

Colin Farrell1, Chanyue Hu1, Kalsuda Lapborisuth1

  • 1Department of Molecular, Cell and Developmental Biology, University of California, Los Angeles, Los Angeles, CA, United States.

Frontiers in Bioinformatics
|January 18, 2024
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Summary
This summary is machine-generated.

The epigenetic pacemaker (EPM) offers a robust framework for studying epigenetic age acceleration, outperforming traditional DNA methylation clocks. It accurately models how factors like toxins and cell type influence biological aging.

Keywords:
DNA methylationagingepigeneticepigenetic clockepigenome

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Area of Science:

  • Epigenetics
  • Computational Biology
  • Aging Research

Background:

  • Epigenetic clocks predict chronological age using DNA methylation.
  • These clocks are used to study biological age acceleration.
  • Traditional clocks may not fully capture factors moderating epigenetic age.

Purpose of the Study:

  • Compare penalized regression epigenetic clocks to the evolutionary epigenetic pacemaker (EPM) framework.
  • Investigate how factors influence the epigenetic state within the EPM model.
  • Determine if the EPM framework better models epigenetic age acceleration.

Main Methods:

  • Simulated data to assess EPM's epigenetic state with age, sex, and cell composition.
  • Analyzed aggregated human data to evaluate EPM's epigenetic state moderation by sex and cell type.
  • Examined polybrominated biphenyl (PBB) exposure data to assess EPM's response to toxins.

Main Results:

  • Epigenetic state in simulations is influenced by age, sex, and cell-type composition.
  • Epigenetic state is moderated by sex and cell type in aggregated human data.
  • Epigenetic state is moderated by toxins (PBB exposure).

Conclusions:

  • The epigenetic pacemaker (EPM) provides a robust framework for studying epigenetic age acceleration.
  • Factors like toxins, sex, and cell type significantly moderate epigenetic state.
  • Traditional linear regression clocks may obscure the impact of these moderating factors.