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Published on: September 27, 2024
Effect of laser resurfacing on p53 expression in photoaged facial skin
Moetaz M El-Domyati1, Sameh K Attia, Ashraf M Esmat
1Department of Dermatology, Faculty of Medicine, Al-Minya University Hospital, Al-Minya, Egypt. moetazeldomyati@yahoo.com
Background:
p53 overexpression has been reported in photoaged skin. Meanwhile, p53 gene mutations have been implicated as an important factor in the pathogenesis of ultraviolet (UV) light-induced skin cancer.
Objective:
The objective was to evaluate the effect of laser resurfacing on the epidermal thickness and expression of p53 in photoaged skin.
Methods:
Specimens were obtained from the facial skin of 10 patients before and after 3 months and 1 year of treatment using CO(2) (five cases) and erbium (Er):YAG (five cases) lasers. Specimens were also obtained from six age-matched controls. These biopsies were used for routine histopathology, histometry, and p53 immunoperoxidase staining.
Results:
Both CO(2) and Er:YAG lasers were found to induce a significant decrease in p53 expression in biopsies obtained after 3 months (p=.0004 and .002, respectively) followed by gradual increase (p=.01 in both groups). A significant increase (p<.01) in epidermal thickness was also observed after 1 year of resurfacing. This increase, however, is inversely correlated with the level of p53 expression in such patients.
Conclusion:
The decrease in epidermal p53 expression after CO(2) and Er:YAG lasers may account for some of the benefits of resurfacing on the epidermis, as well as prevention of actinic neoplasia by adjusting any disturbance in the proliferation/apoptosis balance observed in photoaged facial skin.
