Journal
PHOTOCHEMISTRY AND PHOTOBIOLOGY
Volume 93, Issue 4, Pages 943-955Publisher
WILEY
DOI: 10.1111/php.12691
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Funding
- NIH/NIEHS [ES024373, ES016936]
- American Cancer Society (ACS) [RSG-13-078-01]
- University of Chicago Cancer Research Center [P30 CA014599]
- CTSA [UL1 TR000430]
- University of Chicago Friends of Dermatology Endowment Fund
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UV radiation exposure from sunlight and artificial tanning beds is the major risk factor for the development of skin cancer and skin photoaging. UV-induced skin damage can trigger a cascade of DNA damage response signaling pathways, including cell cycle arrest, DNA repair and, if damage is irreparable, apoptosis. Compensatory proliferation replaces the apoptotic cells to maintain skin barrier integrity. Disruption of these processes can be exploited to promote carcinogenesis by allowing the survival and proliferation of damaged cells. UV radiation also induces autophagy, a catabolic process that clears unwanted or damaged proteins, lipids and organelles. The mechanisms by which autophagy is activated following UV exposure, and the functions of autophagy in UV response, are only now being clarified. Here, we summarize the current understanding of the mechanisms governing autophagy regulation by UV, the roles of autophagy in regulating cellular response to UV-induced photodamage and the implications of autophagy modulation in the treatment and prevention of photoaging and skin cancer.
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