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Published on: September 7, 2013
Molecular events occurring behind ultraviolet-induced skin inflammation
1Department of Dermatology, Tohoku University School of Medicine, Sendai, Japan. terui@mail.cc.tohoku.ac.jp
Abstract:
We reviewed a recent advance in the studies of the molecular mechanisms for 'ultraviolet responses', paying special attention to two transcription factors, nuclear factor kappa B and p53, and to a balance noted between an anti-apoptotic phosphatidylinositol 3-kinase-Akt pathway and its inhibitory ceramide-caveolin-1 pathway. These studies were mostly carried out using in vitro or animal models. On the basis of these results, we determined that phase by phase molecular events clarified in these studies correspond well with the three phases of ultraviolet-induced inflammation observed, i.e. the early vasodilatory phase, the second inflammatory phase in which many inflammatory cells such as neutrophils and T cells accumulate in the skin, and the last regressive phase based on several anti-inflammatory events.
Insights
This review details molecular mechanisms of ultraviolet (UV) responses, focusing on nuclear factor kappa B (NF-κB) and p53. Molecular events align with UV-induced inflammation phases: vasodilation, cell accumulation, and regression.
Area of Science:
- Molecular biology
- Dermatology
- Cellular signaling
Background:
- Ultraviolet (UV) radiation triggers complex cellular responses.
- Understanding UV-induced inflammation mechanisms is crucial for photoprotection and skin health.
Purpose of the Study:
- To review recent advances in molecular mechanisms of UV responses.
- To correlate molecular events with the observed phases of UV-induced inflammation.
Main Methods:
- Review of in vitro and animal model studies.
- Focus on key transcription factors: nuclear factor kappa B (NF-κB) and p53.
- Analysis of the balance between phosphatidylinositol 3-kinase-Akt and ceramide-caveolin-1 pathways.
Main Results:
- Molecular events in UV responses were clarified.
- A correlation was established between molecular pathways and the three phases of UV-induced inflammation (vasodilatory, inflammatory, regressive).
- Key roles of NF-κB, p53, and the Akt/ceramide pathways in UV response phases were highlighted.
Conclusions:
- The molecular cascade of UV responses is intricately linked to the temporal phases of UV-induced inflammation.
- Further research into these pathways can inform strategies for managing UV damage.
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