Cited by 437Toxic Organic Pollutants ImpactSkin Protection and AgingPharmacogenetics and Drug Metabolism

Lightening up the UV response by identification of the arylhydrocarbon receptor as a cytoplasmatic target for ultraviolet B radiation

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Fritsche, Ellen, Schäfer, Claudia, Calles, Christian, Bernsmann, Thorsten, Bernshausen, Thorsten, Wurm, Melanie, Hübenthal, Ulrike, Cline, Jason E. +8 more·2007·Proceedings of the National Academy of Sciences

Abstract

UVB radiation-induced signaling in mammalian cells involves two major pathways: one that is initiated through the generation of DNA photoproducts in the nucleus and a second one that occurs independently of DNA damage and is characterized by cell surface receptor activation. The chromophore for the latter one has been unknown. Here, we report that the UVB response involves tryptophan as a chromophore. We show that through the intracellular generation of photoproducts, such as the arylhydrocarbon receptor (AhR) ligand 6-formylindolo[3,2- b ]carbazole, signaling events are initiated, which are transferred to the nucleus and the cell membrane via activation of the cytoplasmatic AhR. Specifically, AhR activation by UVB leads to ( i ) transcriptional induction of cytochrome P450 1A1 and ( ii ) EGF receptor internalization with activation of the EGF receptor downstream target ERK1/2 and subsequent induction of cyclooxygenase-2. The role of the AhR in the UVB stress response was confirmed in vivo by studies employing AhR KO mice.

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Crossref · 10.1073/pnas.0701764104

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  • PAHs are potent activators of AhR, which is expressed in keratinocytes and melanocytes.

    “PAHs are potent activators of the aryl hydrocarbon receptor (AhR), which is a ligand-dependent transcription factor expressed in keratinocytes and melanocytes (Fritsche et al. 2007; Jux et al. 2011).”

    From Particulate matter 2.5 damages skin cells by inducing oxidative stress, subcellular organelle dysfunction, and apoptosis (2018) · cites this paper as Fritsche et al. 2007

    The introductory passage (page unavailable) describes AhR as a ligand-dependent receptor that mediates PAH toxicity and activates gene transcription after ligand binding. The Results and Discussion show AhR signaling in HaCaT keratinocytes, but the copy does not establish AhR expression in melanocytes or specifically describe PAHs as potent activators. (LLM, conf=0.86)

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Research works printed but not linked: 1

  1. [49]Gilchrest BA, Krutmann J (2006) Skin Aging (Springer, NY).

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Authors
Fritsche, E., Schäfer, C., Calles, C., Bernsmann, T., Bernshausen, T., Wurm, M., Hübenthal, U., Cline, J. E., Hajimiragha, H., Schroeder, P., Klotz, L.-O., Rannug, A., Fürst, P., Hanenberg, H., Abel, J., & Krutmann, J.
Affiliations
  • Leibniz Institute of Environmental Medicine (DE)
  • Chemical and Veterinary Control Laboratory, Josef-König-Strasse 40, 48147 Münster, Germany;
  • Heinrich Heine University Düsseldorf (DE)
  • *Institut für Umweltmedizinische Forschung (IUF), Auf'm Hennekamp 50, 40225 Düsseldorf, Germany;
  • Karolinska Institutet (SE)
Venue
Proceedings of the National Academy of Sciences
Published
2007-05-22
Volume
104
Issue
21
Pages
8851-8856
ISSN
  • 0027-8424 (ISSN-L)
  • 1091-6490
OpenAlex
W2071813734
Cited by
437
References
50
Citations by year
2026: 10 · 2025: 10 · 2024: 18 · 2023: 16 · 2022: 22 · 2021: 24 · 2020: 19 · 2019: 23 · 2018: 35 · 2017: 24 · 2016: 21 · 2015: 25 · 2014: 25 · 2013: 19 · 2012: 29
FWCI
22.52
Type
journal article
Language
en
Open access
Locations
  • Proceedings of the National Academy of Sciences (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Physical Sciences › Environmental Science › Health, Toxicology and Mutagenesis › Toxic Organic Pollutants Impact
  • Health Sciences › Medicine › Dermatology › Skin Protection and Aging
  • Life Sciences › Pharmacology, Toxicology and Pharmaceutics › Pharmacology › Pharmacogenetics and Drug Metabolism
Keywords
UV-B radiation, aryl hydrocarbon receptor, FICZ, DNA photoproducts, CYP1A1, ERK signaling, cyclooxygenase-2, AhR knockout mice
MeSH terms
Animals, Carbazoles, Cell Line, Cell Nucleus, Cytoplasm, Gene Expression Regulation, Humans, Indoles, Transcription, Genetic, Tryptophan, Ultraviolet Rays, Molecular Structure, Signal Transduction, Proto-Oncogene Proteins pp60(c-src), Receptors, Aryl Hydrocarbon, Mice, Knockout, Cytochrome P-450 CYP1A1, Active Transport, Cell Nucleus, Mice, Basic Helix-Loop-Helix Proteins, Basic Helix-Loop-Helix Transcription Factors, ErbB Receptors

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