Efficacy of ceramide-containing formulations on UV-induced skin surface barrier alterations

ABSTRACT

The human skin, particularly the stratum corneum, serves as a protective barrier against exogenous factors, including ultraviolet radiation (UVR) and pathogen invasions. The impact of UVR on skin cancer and photoaging has been extensively studied. However, the direct impact of UVR on skin barrier integrity under clinical settings remains poorly explored. Due to their benefits in reducing inflammation and promoting skin barrier repair, ceramide-containing formulations can provide added photoprotection benefits. In this study, the efficacy of a ceramide-containing sunscreen and moisturizer were evaluated in preventing UV-induced skin surface barrier changes. Expert grading, instrumental, and tape-stripping assessments demonstrated that UVR induced erythema and hyperpigmentation and caused changes in skin cells surface morphological organization and maturation. Treatment with a ceramide-containing sunscreen and moisturizing cream routine reduced erythema and hyperpigmentation, improved skin hydration, and maintained normal superficial skin cells morphology and turnover after UVR. Our results indicate that barrier-enforcing lipids formulations can provide additional benefits in patient’s daily routine by strengthening the barrier and improving skin health overall against chronic sun exposure.

(J Drugs Dermatol. 2021;20(4 Suppl):s29-35. doi:10.36849/JDD.S589E)

Hawasatu Dumbuya PhD, XiYan MD PhD, Ying Chen PhD, Janet Wangari-Olivero PhD, Stephen Lynch PhD, Patricia Brieva PhD, Qian Zheng MD PhD, Charbel Bouez PhD