PMID- 25058847 OWN - NLM STAT- MEDLINE DCOM- 20150519 LR - 20171116 IS - 1095-9947 (Electronic) IS - 1050-4648 (Linking) VI - 40 IP - 2 DP - 2014 Oct TI - Aryl hydrocarbon receptor protein and Cyp1A1 gene induction by LPS and phenanthrene in Atlantic cod (Gadus morhua) head kidney cells. PG - 384-91 LID - S1050-4648(14)00263-0 [pii] LID - 10.1016/j.fsi.2014.07.022 [doi] AB - The objective of this study was to evaluate interactions between environmental toxicants and cod immune cells during inflammation. Phenanthrene is abundant in plant oils (rapeseed, palm, and soya oil) as compared to fish oils, and consequently constitute an undesirable element in plant replacement diets in aquaculture. Phenanthrene was added to head kidney cell cultures, alone or together with LPS (lipopolysaccharide) or poly I: C (polyinosinic acid: polycytidylic acid), and the responses were evaluated in terms of protein and gene expression. The results showed that LPS, poly I: C or phenanthrene, added to the cultures separately, induced aryl hydrocarbon receptor (AhR) protein expression. Phenanthrene treatment in combination with LPS induced AhR protein expression and Cyp1A1 gene transcription, which not was observed combining poly I: C and phenanthrene. Phenanthrene exposure up regulated the transcription of common stress and detoxification enzymes like catalase, caspase 3 and glutathione S-transferase alfa 3 subunit B (GSTAB3), while LPS exposure alone or combined with phenanthrene down regulated GSTAB3 and catalase in cod leukocytes. It seems clear that immune regulation and phenanthrene induced signaling pathways interact; transcriptional down regulation of detoxification and antioxidant enzymes by LPS could indicate that combating bacterial infections is the number one priority in these cells, and that AhR and Cyp1A1 is somehow involved in this signaling cascade. LPS seems to affect the mitogen activated protein kinases (MAPKs) pathways (P-p38 and ERK1/2) thus modulating the AhR protein and Cyp1A1 gene transcription, while phenanthrene possibly activates AhR by ligand binding. CI - Copyright (c) 2014 Elsevier Ltd. All rights reserved. FAU - Holen, Elisabeth AU - Holen E AD - National Institute of Nutrition and Seafood Research (NIFES), P. B. 2029 Nordnes, 5817 Bergen, Norway. Electronic address: eho@nifes.no. FAU - Olsvik, Pal Asgeir AU - Olsvik PA AD - National Institute of Nutrition and Seafood Research (NIFES), P. B. 2029 Nordnes, 5817 Bergen, Norway. LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20140722 PL - England TA - Fish Shellfish Immunol JT - Fish & shellfish immunology JID - 9505220 RN - 0 (Fish Proteins) RN - 0 (Lipopolysaccharides) RN - 0 (Phenanthrenes) RN - 0 (Receptors, Aryl Hydrocarbon) RN - 448J8E5BST (phenanthrene) RN - EC 1.14.14.1 (Cytochrome P-450 CYP1A1) RN - O84C90HH2L (Poly I-C) SB - IM MH - Animal Feed/analysis MH - Animals MH - Cytochrome P-450 CYP1A1/*genetics/metabolism MH - Fish Proteins/*genetics/metabolism MH - Gadus morhua/*genetics/*immunology/metabolism MH - Gene Expression Regulation/*drug effects MH - Head Kidney/metabolism MH - Lipopolysaccharides/physiology MH - Phenanthrenes/*pharmacology MH - Poly I-C/pharmacology MH - Real-Time Polymerase Chain Reaction/veterinary MH - Receptors, Aryl Hydrocarbon/*genetics/metabolism OTO - NOTNLM OT - AhR OT - CYP1A1 OT - LPS OT - Pheneanthrene OT - poly I:C EDAT- 2014/07/25 06:00 MHDA- 2015/05/20 06:00 CRDT- 2014/07/25 06:00 PHST- 2014/03/26 00:00 [received] PHST- 2014/07/10 00:00 [revised] PHST- 2014/07/12 00:00 [accepted] PHST- 2014/07/25 06:00 [entrez] PHST- 2014/07/25 06:00 [pubmed] PHST- 2015/05/20 06:00 [medline] AID - S1050-4648(14)00263-0 [pii] AID - 10.1016/j.fsi.2014.07.022 [doi] PST - ppublish SO - Fish Shellfish Immunol. 2014 Oct;40(2):384-91. doi: 10.1016/j.fsi.2014.07.022. Epub 2014 Jul 22.