Epigenetic Clocks in Skin Aging - From Exposome Drivers to Biomarkers and Therapeutic Interventions

Sep 29, 2026

Uploaded by Melati

Skin aging is presented as a multifactorial process shaped by intrinsic genetic programming and extrinsic environmental exposures. Advances in epigenetics clarify how DNA methylation, histone modifications, and noncoding RNAs govern skin aging, with epigenetic clocks enabling biological-age quantification. The review synthesizes evidence on environmental and lifestyle drivers—especially ultraviolet radiation, pollution, smoking, diet, and stress—linking them to epigenetic mechanisms, biomarkers, and emerging therapeutic interventions.

LanguageEnglish

CategoryHealthcare

FormatPDF

Pages14

Reading Time35 min

AccessFree to download

Introduction

Material and Methods

Clinical, Cosmetic and Investigational Dermatology Open Access Full Text Article REVIEW Epigenetic Clocks in Skin Aging: From Exposome Drivers to Biomarkers and Therapeutic Interventions Alejandra DelaO-Escamilla 1 , Samar Khalil 2 , Hassan Galadari 3 , Stefania Guida 4 1Department of Dermatology, Universidad Autónoma de Nuevo León, Monterrey, Nuevo León, Mexico; 2Department of Dermatology, Skin and Scalpel Clinic, Beirut, Lebanon; 3Department of Medicine and Health Sciences, United Arab Emirates University, Al Ain, United Arab Emirates; 4School of Medicine, Vita-Salute San Raffaele University, Dermatology Clinic, IRCCS San Raffaele Hospital, Milan, Italy Correspondence: Hassan Galadari, Department of Medicine and Health Sciences, United Arab Emirates University, Khalifa Bin Zayed Street, P.O. Box 15551, Tawam, Al Ain, United Arab Emirates, Tel +971-03-7137571, Email [hgaladari@uaeu.ac.ae](hgaladari@uaeu.ac.ae) | Abstract: Skin aging is a multifactorial process driven by a combination of intrinsic genetic programming and extrinsic environmental exposures. Recent advances in epigenetics have illuminated how changes in DNA methylation, histone modifications, and noncoding RNAs regulate skin aging, with the epigenetic clock emerging as a powerful tool to quantify biological age. This review aims to synthesize current evidence on how environmental and lifestyle factors – particularly ultraviolet radiation, pollution, smoking, diet, and stress – accelerate skin aging through epigenetic mechanisms, while also evaluating the potential of skin-specific epigenetic clocks as biomarkers for early detection of premature aging and for guiding therapeutic interventions. We further discuss the expanding field of epigenetic-targeted therapies in dermatology, encompassing topical agents, energy-based devices, and systemic approaches that may reverse or delay visible signs of cutaneous aging. By integrating insights from molecular biology, environmental science, and clinical dermatology, this review positions skin aging not as an irreversible outcome but as a modifiable, biologically regulated process with promising avenues for personalized prevention and rejuvenation.
Keywords: epigenetic aging, skin rejuvenation, environmental exposome, DNA methylation, therapeutic interventions | | --- | | Introduction
Skin ageing has shifted from a purely cosmetic preoccupation to a public health issue as life expectancy rises and more than two billion people are projected to be over 60 years old by 2050.1 Clinically, visible changes such as wrinkles, pigment irregularities, or laxity erode quality of life.2,3 Still, mechanistically, they reflect deeper molecular damage that accumulates daily with ultraviolet (UV) exposure, air pollution, diet, and lifestyle choices.4,5 Over the past decade, epigenetic drift, which is the predictable, age-linked alterations in DNA methylation, histone marks, chromatin architecture, and non-coding RNAs,6,7 has emerged as the crucial conduit through which those external insults are transduced into lasting changes in cutaneous gene expression.8–10
This epigenetic drift is quantifiable: pan-tissue and skin-specific “epigenetic clocks” translate thousands of methylations shifts into a biological-age read-out that correlates tightly with clinical photoaging scores and systemic morbidities.11–13 Equally important, drift is no longer viewed as unidirectional; landmark work shows that transient expression of reprogramming factors, small-molecule inhibition of DNA and histone-modifying enzymes, and even clinical interventions such as fractional lasers can partially reset the cutaneous clock without erasing cell identity.14–16 These findings recast skin ageing as a dynamic and potentially reversible epigenetic program rather than a fixed consequence of somatic mutation.
In recent years, skin epigenetics has advanced rapidly, illustrating how alterations in DNA methylation, histone modifications, and non-cod

FAQs

What role do epigenetic clocks play in understanding skin aging?

Epigenetic clocks convert large sets of DNA methylation changes into a biological-age read-out that correlates with clinical photoaging measures and systemic morbidities.

Which environmental factors are highlighted as drivers of skin aging through epigenetic mechanisms?

The review emphasizes ultraviolet radiation, air pollution, smoking, diet, and stress as key exposures that accelerate skin aging via epigenetic regulation.

How can skin-specific epigenetic clocks contribute to clinical care?

They can serve as biomarkers for early detection of premature aging and help guide therapeutic interventions aimed at modulating cutaneous aging.

Sep 29, 2026

Uploaded by Melati