Molecular Profiling Reveals Personalized Pathways in Skin Aging

Key Takeaways

• Transcriptomic profiling identified a >1,200-gene molecular signature of skin aging, spanning inflammation, barrier function, and senescence pathways.
• Distinct differences were observed between intrinsic and extrinsic aging, with photo-exposed skin showing increased melanogenesis and UV-related pathway activation.
• Molecular aging patterns varied by race and gender, supporting the potential for personalized, longevity-focused dermatologic interventions.

A translational biomarker study presented at the American Academy of Dermatology (AAD) 2026 Annual Meeting highlighted distinct molecular signatures of skin aging, revealing potential targets for personalized, longevity-based interventions in aesthetic dermatology.

Helen He, MD, PhD, and colleagues analyzed tape-strip samples from 156 healthy individuals aged 20 to 85, using RNA sequencing to characterize transcriptomic changes across photo-exposed and photo-protected skin. The approach identified a broad aging-associated gene signature comprising more than 1,200 genes related to inflammation, barrier regulation, and senescence.

Framing the study within evolving treatment paradigms, Dr. He noted that “we are moving away from just treating the clinical and histological symptoms of skin aging towards more longevity based and holistic approaches that really aim to target the drivers of aging at the root cause, including the systemic hallmarks.” 

Key differences emerged between intrinsic and extrinsic aging. Photo-exposed facial skin demonstrated age-dependent increases in melanogenesis, with upregulation of melanocyte-related genes observed primarily in older individuals. Ultraviolet-responsive pathways, including NF-κB signaling, oxidative stress responses, and collagen-related pathways, showed peak dysregulation beginning in midlife.

“There could be a critical window starting at age 40 years old where the effects of UV exposure are actively driving downstream signaling pathways, such as NFκB activation, apoptosis, senescence, collagen depletion, and oxidative stress related damage on the skin,” Dr. He said. 

The study also identified race- and sex-specific patterns. Asian and Black participants showed greater age-related changes in barrier-associated genes, including increased cornified envelope gene expression and decreased lipid synthesis. Immune aging trajectories varied across groups, with earlier immune activation peaks in Asian individuals and progressive inflammation observed in White individuals. In women aged 60 years and older, androgen-related pathways were upregulated and associated with immune and barrier dysregulation.

Tape stripping enabled minimally invasive sampling of molecular changes in cosmetically sensitive areas.

“These are minimally invasive, so no pain, no scarring, no bleeding,” Dr. He said. “That really makes them ideal for sampling cosmetically sensitive areas such as the face.”