UV-induced Expression of Key Component of the Tanning Process, the POMC and MC1R Genes, Is Dependent on the p-38-activated Upstream Stimulating Factor-1 (USF-1)
Copyright policy )UV-induced Expression of Key Component of the Tanning Process, the POMC and MC1R Genes, Is Dependent on the p-38-activated Upstream Stimulating Factor-1 (USF-1)
Protection against UV-mediated DNA damage and the onset of oncogenesis is afforded by the tanning response in which UV irradiation triggers melanocytes to increase production of melanin that is then transferred to keratinocytes. A key component of the tanning process is the UV-mediated induction of the pro-opiomelanocortin (POMC) and MC1R genes encoding the alpha-melanocyte-stimulating hormone and its receptor, respectively, which play a crucial role in pigmentation by regulating the intracellular levels of cAMP. How these genes are regulated in response to UV irradiation is not known. Here we have shown that UV-induced activation of the POMC and MC1R promoters is mediated by p38 stress-activated kinase signaling to the transcription factor, upstream stimulating factor-1 (USF-1). Importantly, melanocytes derived from USF-1 -/- mice exhibit a defective UV response and fail to activate POMC and MC1R expression in response to UV irradiation. The results define USF-1 as a critical UV-responsive activator of genes implicated in protection from solar radiation.
- University of Oxford United Kingdom
- University of Paris France
- UNIVERSITE PARIS DESCARTES France
- Inserm France
- University of Rennes 1 France
Chromatin Immunoprecipitation, Time Factors, DNA, Complementary, Pro-Opiomelanocortin, Ultraviolet Rays, Amino Acid Motifs, Blotting, Western, [SDV.GEN] Life Sciences [q-bio]/Genetics, Transfection, p38 Mitogen-Activated Protein Kinases, Models, Biological, Cell Line, Promoter Regions, Mice, Genetic, Models, Genes, Reporter, Complementary, Cell Line, Tumor, Receptors, Animals, Humans, Transgenes, Luciferases, Promoter Regions, Genetic, Reporter, Melanins, Tumor, Pituitary Hormone, Blotting, Pigmentation, DNA, Biological, DNA-Binding Proteins, Genes, Gene Expression Regulation, Spectrophotometry, Sunlight, Upstream Stimulatory Factors, RNA, Melanocytes, Transcription, Western, Signal Transduction, Transcription Factors, DNA Damage
Chromatin Immunoprecipitation, Time Factors, DNA, Complementary, Pro-Opiomelanocortin, Ultraviolet Rays, Amino Acid Motifs, Blotting, Western, [SDV.GEN] Life Sciences [q-bio]/Genetics, Transfection, p38 Mitogen-Activated Protein Kinases, Models, Biological, Cell Line, Promoter Regions, Mice, Genetic, Models, Genes, Reporter, Complementary, Cell Line, Tumor, Receptors, Animals, Humans, Transgenes, Luciferases, Promoter Regions, Genetic, Reporter, Melanins, Tumor, Pituitary Hormone, Blotting, Pigmentation, DNA, Biological, DNA-Binding Proteins, Genes, Gene Expression Regulation, Spectrophotometry, Sunlight, Upstream Stimulatory Factors, RNA, Melanocytes, Transcription, Western, Signal Transduction, Transcription Factors, DNA Damage
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