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Exploratory Study to Identify Skin Anti-Aging Biomarkers as a Result of a Non-ablative Fractional Laser Treatment

ABSTRACT: Non-ablative fractional laser can be used to treat photoaged skin by stimulating the breakdown and regeneration of dermal matrix constituents, such as collagen and elastic fibers. The objective of this study was to validate previously studied molecular mechanisms and explore yet uncharacterized biomarkers underlying the clinical efficacy of non-ablative fractional laser resurfacing.

ORGANISM(S): Homo sapiens

PROVIDER: GSE206495 | GEO | 2022/12/09

REPOSITORIES: GEO

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Project description:Ablative fractional laser treatment is considered the gold standard for skin rejuvenation. In order to understand how fractional laser works to rejuvenate skin, we performed microarray profiling on skin biopsies to identify temporal and dose-response changes in gene expression following fractional laser treatment. The backs of 14 women were treated with ablative fractional laser (Fraxel®) and 4 mm punch biopsies were collected from an untreated site and at the treated sites 1, 3, 7, 14, 21 and 28 days after the single treatment. In addition, in order to understand the effect that multiple fractional laser treatments have on skin rejuvenation, several sites were treated sequentially with either 1, 2, 3, or 4 treatments (with 28 days between treatments) followed by the collection of 4 mm punch biopsies. RNA was extracted from the biopsies, analyzed using Affymetrix U219 chips and gene expression was compared between untreated and treated sites. We observed dramatic changes in gene expression as early as 1 day after fractional laser treatment with changes remaining elevated even after 1 month. Analysis of individual genes demonstrated significant and time related changes in inflammatory, epidermal, and dermal genes, with dermal genes linked to extracellular matrix formation changing at later time points following fractional laser treatment. When comparing the age-related changes in skin gene expression to those induced by fractional laser, it was observed that fractional laser treatment reverses many of the changes in the aging gene expression. Finally, multiple fractional laser treatments, which cover different regions of a treatment area, resulted in a sustained or increased dermal remodeling response, with many genes either differentially regulated or continuously upregulated, supporting previous observations that maximal skin rejuvenation requires multiple fractional laser treatments. In conclusion, fractional laser treatment of human skin activates a number of biological processes involved in wound healing and tissue regeneration.

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Exploratory Study to Identify Skin Anti-Aging Biomarkers as a Result of a Non-ablative Fractional Laser Treatment

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