Downregulation of carnitine acetyltransferase by promoter hypermethylation regulates ultraviolet-induced matrix metalloproteinase-1 expression in human dermal fibroblasts.

Min Ji Song, Min-Kyoung Kim, Chi-Hyun Park, Haesoo Kim, Si Hyung Lee, Dong Hun Lee, Jin Ho Chung

Department of Dermatology, Seoul National University College of Medicine, Seoul, Republic of Korea; Department of Biomedical Sciences, Seoul National University Graduate School, Seoul, Republic of Korea; Institute of Human-Environment Interface Biology, Medical Research Center, Seoul National University, Seoul, Republic of Korea.Department of Dermatology, Seoul National University College of Medicine, Seoul, Republic of Korea; Department of Biomedical Sciences, Seoul National University Graduate School, Seoul, Republic of Korea; Institute of Human-Environment Interface Biology, Medical Research Center, Seoul National University, Seoul, Republic of Korea. · pubmed

Paper

Abstract

Overexposure to ultraviolet (UV) radiation accelerates skin aging, resulting in wrinkle formation, reduced skin elasticity, and hyperpigmentation. UV irradiation induces increased matrix metalloproteinases (MMPs) that degrade collagen in the extracellular matrix. Skin aging is also accompanied by epigenetic alterations such as promoter methylation by DNA methyltransferases, leading to the activation or suppression of gene expression. Although carnitine acetyltransferase (CRAT) is implicated in aging, the effect of UV on the expression of CRAT and regulatory mechanisms of UV-induced MMP-1 expression remain unknown.

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Research summary

The paper investigates the role of carnitine acetyltransferase and its regulation through epigenetic mechanisms in the context of UV-induced skin aging, which is a relevant aspect of the aging process. However, while it contributes to understanding the molecular pathways involved in skin aging, it does not address broader mechanisms of aging or lifespan extension. The findings are solid but represent an incremental advance rather than a significant breakthrough in the field of longevity research.

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