1. A single dose of Ultraviolet-A induces proteome remodeling and senescence in primary human keratinocytes.
- Author
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Valerio HP, Ravagnani FG, Ronsein GE, and Di Mascio P
- Subjects
- Antioxidants metabolism, Humans, Inflammation etiology, Inflammation metabolism, Keratinocytes immunology, Keratinocytes metabolism, Keratinocytes radiation effects, Proteome analysis, Proteome radiation effects, Cellular Senescence, Inflammation pathology, Inflammation Mediators metabolism, Keratinocytes pathology, Oxidative Stress, Proteome metabolism, Ultraviolet Rays adverse effects
- Abstract
Epidermal photoaging contributes to skin fragility over time and it is a risk factor for skin cancer. Photoaging has been associated for a long time with exposure to Ultraviolet-A (UVA) light, the predominant component of the solar ultraviolet radiation. While the cellular mechanisms underlying UVA-induced photoaging in the dermis have been well characterized, UVA's action on the epidermis remains elusive. Here, proteomic analysis was conducted to derive the cellular responses induced by an environmentally relevant dose of UVA in primary human keratinocytes. We also investigated the effects of UVA on non-transformed immortalized keratinocytes (HaCaT cells), bearing potentially oncogenic mutations. We showed that UVA induces proteome remodeling and senescence in primary keratinocytes, eliciting potent antioxidant and pro-inflammatory responses. Additionally, we showed that UVA modulates the secretory phenotype of these cells to the extent of inducing paracrine oxidative stress and immune system activation in pre-malignant keratinocytes. These observations offer insights into the cellular mechanisms by which UVA drives photoaging in the skin., (© 2021. The Author(s).) more...
- Published
- 2021
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