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A Blood-Based Molecular Clock for Biological Age Estimation.

Ersilia Paparazzo1, Silvana Geracitano1, Vincenzo Lagani2,3,4

  • 1Department of Biology, Ecology and Earth Sciences, University of Calabria, 87036 Rende, Italy.

Cells
|January 8, 2023
PubMed
Summary

Researchers developed a new molecular clock using DNA methylation of ELOVL fatty acid elongase 2 (ELOVL2) and signal joint T-cell receptor rearrangement excision circles (sjTRECs) to accurately measure biological age. This cost-effective method provides a reliable way to assess individual aging rates in humans.

Keywords:
ELOVL2age predictionepigeneticssjTRECs

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Area of Science:

  • Epigenetics and Aging
  • Biomarker Discovery
  • Molecular Epidemiology

Background:

  • Identifying reliable biomarkers for biological age is crucial for understanding human aging.
  • DNA methylation of ELOVL fatty acid elongase 2 (ELOVL2) and sjTRECs are promising, yet unintegrated, aging biomarkers.
  • A validated molecular clock combining these markers is currently lacking.

Purpose of the Study:

  • To develop and validate a novel molecular clock for biological age assessment.
  • To integrate ELOVL2 DNA methylation and sjTREC levels for enhanced aging prediction.
  • To evaluate the accuracy of the proposed clock in a diverse age group.

Main Methods:

  • Re-analysis of existing ELOVL2 methylation data from 194 Italian individuals.
  • Quantification of sjTRECs in the same blood samples.
  • Development of a predictive model combining both biomarkers.

Main Results:

  • The developed molecular clock demonstrated high prediction accuracy.
  • Achieved an error of approximately 2.5 years in younger individuals.
  • Observed a low error margin in older subjects compared to previous studies.

Conclusions:

  • An easy, cost-effective, and reliable model for measuring individual aging rates has been established.
  • This integrated biomarker approach offers a promising tool for assessing aging quality.
  • Further validation and application-focused studies are warranted.