A Targeted Epigenetic Clock for the Prediction of Biological Age

Area of Science:

• Epigenetics
• Genomics
• Biogerontology

Background:

• Epigenetic clocks initially tracked chronological age but now predict biological age.
• Genome-wide DNA methylation analysis is common, but targeted approaches offer advantages.
• Developing accurate, targeted epigenetic clocks is crucial for biological age assessment.

Purpose of the Study:

• To develop a targeted epigenetic clock optimized for biological age measurement.
• To validate the clock's performance across diverse age-related conditions.
• To explore its utility as a novel biomarker in healthcare.

Main Methods:

• Developed a targeted epigenetic clock using six genomic regions (ELOVL2, NHLRC1, AIM2, EDARADD, SIRT7, TFAP2E).
• Utilized DNA methylation assessment via EpiTYPER assay.
• Validated the clock in healthy individuals, individuals with Down syndrome, centenarians, centenarians' offspring, and elderly individuals undergoing nutritional intervention.

Main Results:

• The targeted epigenetic clock showed high correlation with chronological age in healthy subjects (Spearman correlation = 0.89).
• Epigenetic age was significantly elevated in Down syndrome (increased biological age) and reduced in centenarians and related groups (decreased biological age).
• Results align with previous findings from genome-wide epigenetic clocks.

Conclusions:

• The developed targeted epigenetic clock is a promising tool for measuring biological age.
• It demonstrates potential as a novel biomarker for assessing aging and age-related health.
• Further evaluation in large cohorts can promote its use in clinical practice.