Epigenetic clock: A promising biomarker and practical tool in aging

Area of Science:

• Gerontology
• Epigenetics
• Biomarker Development

Background:

• Aging is a complex process involving cellular and molecular changes.
• Epigenetic aging, specifically DNA methylation patterns, is increasingly recognized as a key aging hallmark.
• Epigenetic clocks have emerged as powerful tools to assess biological age.

Purpose of the Study:

• To provide a comprehensive overview of epigenetic clocks as biomarkers of aging.
• To discuss various types of epigenetic clocks and their differences.
• To explore the application of epigenetic clocks in risk prediction and evaluating age-reversing interventions.

Main Methods:

• Review of existing literature on epigenetic clocks.
• Comparison of prominent epigenetic clock models (e.g., Horvath's, Hannum's, DNA PhenoAge, DNA GrimAge).
• Analysis of studies correlating epigenetic age with health outcomes and intervention efficacy.

Main Results:

• Epigenetic clocks correlate with morbidity and mortality, showing potential for risk prediction.
• These clocks serve as practical tools for evaluating the effectiveness of age-reversing interventions.
• Several types of epigenetic clocks exist, each with unique characteristics and applications.

Conclusions:

• Epigenetic clocks are valuable biomarkers for understanding and managing healthy aging.
• Further research and higher-quality data are needed to overcome current challenges.
• Epigenetic clocks offer novel insights into aging mechanisms and potential manipulation strategies.