tryptophan photoproducts
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2019 ◽  
Vol 20 (21) ◽  
pp. 5424 ◽  
Author(s):  
Masutaka Furue ◽  
Akiko Hashimoto-Hachiya ◽  
Gaku Tsuji

The aryl hydrocarbon receptor (AHR)/AHR-nuclear translocator (ARNT) system is a sensitive sensor for small molecular, xenobiotic chemicals of exogenous and endogenous origin, including dioxins, phytochemicals, microbial bioproducts, and tryptophan photoproducts. AHR/ARNT are abundantly expressed in the skin. Once activated, the AHR/ARNT axis strengthens skin barrier functions and accelerates epidermal terminal differentiation by upregulating filaggrin expression. In addition, AHR activation induces oxidative stress. However, some AHR ligands simultaneously activate the nuclear factor-erythroid 2-related factor-2 (NRF2) transcription factor, which is a master switch of antioxidative enzymes that neutralizes oxidative stress. The immunoregulatory system governing T-helper 17/22 (Th17/22) and T regulatory cells (Treg) is also regulated by the AHR system. Notably, AHR agonists, such as tapinarof, are currently used as therapeutic agents in psoriasis and atopic dermatitis. In this review, we summarize recent topics on AHR related to atopic dermatitis and psoriasis.


2005 ◽  
Vol 90 (1) ◽  
pp. 96-110 ◽  
Author(s):  
Silvia Diani-Moore ◽  
Erin Labitzke ◽  
Richard Brown ◽  
Alexander Garvin ◽  
Linda Wong ◽  
...  

1994 ◽  
Vol 321 (4) ◽  
pp. 229-239 ◽  
Author(s):  
Michael Sjögren ◽  
Ulf Sjöberg ◽  
Ulf Rannug

1992 ◽  
Vol 20 (4) ◽  
pp. 289-296 ◽  
Author(s):  
U. Rannug ◽  
E. Agurell ◽  
A. Rannug ◽  
H. Cederberg

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