Song, Jun-Young; Casanova-Nakayama, Ayako; Möller, Anja-Maria; Kitamura, Shin-Ichi; Nakayama, Kei; Segner, Helmut (2020). Aryl Hydrocarbon Receptor Signaling Is Functional in Immune Cells of Rainbow Trout (Oncorhynchus mykiss). International journal of molecular sciences, 21(17), p. 6323. MDPI 10.3390/ijms21176323
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The arylhydrocarbon receptor (AhR) is an important signaling pathway in the immune system of mammals. In addition to its physiological functions, the receptor mediates the immunotoxic actions of a diverse range of environmental contaminants that bind to and activate the AhR, including planar halogenated aromatic hydrocarbons (PHAHs or dioxin-like compounds) and polynuclear aromatic hydrocarbons (PAHs). AhR-binding xenobiotics are immunotoxic not only to mammals but to teleost fish as well. To date, however, it is unknown if the AhR pathway is active in the immune system of fish and thus may act as molecular initiating event in the immunotoxicity of AhR-binding xenobiotics to fish. The present study aims to examine the presence of functional AhR signaling in immune cells of rainbow trout (Oncorhynchus mykiss). Focus is given to the toxicologically relevant AhR2 clade. By means of RT-qPCR and in situ hybdridization, we show that immune cells of rainbow trout express ahr 2α and ahr 2β mRNA; this applies for immune cells isolated from the head kidney and from the peripheral blood. Furthermore, we show that in vivo as well as in vitro exposure to the AhR ligand, benzo(a)pyrene (BaP), causes upregulation of the AhR-regulated gene, cytochrome p4501a, in rainbow trout immune cells, and that this induction is inhibited by co-treatment with an AhR antagonist. Taken together, these findings provide evidence that functional AhR signaling exists in the immune cells of the teleost species, rainbow trout.
Item Type: |
Journal Article (Original Article) |
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Division/Institute: |
05 Veterinary Medicine > Department of Infectious Diseases and Pathobiology (DIP) > Institute for Fish and Wildlife Health (FIWI) |
UniBE Contributor: |
Segner, Helmut |
Subjects: |
500 Science > 570 Life sciences; biology 600 Technology > 630 Agriculture |
ISSN: |
1422-0067 |
Publisher: |
MDPI |
Language: |
English |
Submitter: |
Pamela Schumacher |
Date Deposited: |
08 Sep 2020 14:22 |
Last Modified: |
07 Jan 2024 01:37 |
Publisher DOI: |
10.3390/ijms21176323 |
PubMed ID: |
32878328 |
Uncontrolled Keywords: |
aryl hydrocarbon receptor cytochrome P4501A fish head kidney immune cells immune signaling immunotoxicity rainbow trout |
BORIS DOI: |
10.7892/boris.146422 |
URI: |
https://boris.unibe.ch/id/eprint/146422 |
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