PMID- 32585357 OWN - NLM STAT- MEDLINE DCOM- 20210311 LR - 20210311 IS - 1095-9947 (Electronic) IS - 1050-4648 (Linking) VI - 104 DP - 2020 Sep TI - Two types of TNF-alpha and their receptors in snakehead (Channa argus): Functions in antibacterial innate immunity. PG - 470-477 LID - S1050-4648(20)30385-5 [pii] LID - 10.1016/j.fsi.2020.05.059 [doi] AB - Tumor necrosis factor-alpha (TNF-alpha) is a pluripotent mediator of pro-inflammatory and antimicrobial defense mechanisms and a regulator of lymphoid organ development. Although two types of TNF-alpha have been identified in several teleost species, their functions in pathogen infection remain largely unexplored, especially in pathogen clearance. Herein, we cloned and characterized two types of TNF-alpha, termed shTNF-alpha1 and shTNF-alpha2, and their receptors, shTNFR1 and shTNFR2, from snakehead (Channa argus). These genes were constitutively expressed in all tested tissues, and were induced by Aeromonas schubertii and Nocardia seriolae in head kidney and spleen in vivo, and by lipoteichoic acid (LTA), lipopolysaccharides (LPS), and Polyinosinic-polycytidylic acid [Poly (I:C)] in head kidney leukocytes (HKLs) in vitro. Moreover, recombinant shTNF-alpha1 and shTNF-alpha2 upregulated the expression of endogenous shTNF-alpha1, shTNF-alpha2, shTNFR1, and shTNFR2, and enhanced intracellular bactericidal activity, with shTNF-alpha1 having a greater effect than shTNF-alpha2. These findings suggest important roles of fish TNFalpha1, TNFalpha2, and their receptors in bacterial infection and pathogen clearance, and provide a new insight into their function in antibacterial innate immunity. CI - Copyright (c) 2020 Elsevier Ltd. All rights reserved. FAU - Cui, Zheng-Wei AU - Cui ZW AD - Key Laboratory of Fishery Drug Development of Ministry of Agriculture and Rural Affairs, Key Laboratory of Aquatic Animal Immune Technology of Guangdong Province, Pearl River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou, China. FAU - Kong, Lu-Lu AU - Kong LL AD - Key Laboratory of Fishery Drug Development of Ministry of Agriculture and Rural Affairs, Key Laboratory of Aquatic Animal Immune Technology of Guangdong Province, Pearl River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou, China; College of Fisheries and Life Science, Shanghai Ocean University, Shanghai, China. FAU - Zhao, Fei AU - Zhao F AD - Key Laboratory of Fishery Drug Development of Ministry of Agriculture and Rural Affairs, Key Laboratory of Aquatic Animal Immune Technology of Guangdong Province, Pearl River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou, China. Electronic address: zhaofei@prfri.ac.cn. FAU - Tan, Ai-Ping AU - Tan AP AD - Key Laboratory of Fishery Drug Development of Ministry of Agriculture and Rural Affairs, Key Laboratory of Aquatic Animal Immune Technology of Guangdong Province, Pearl River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou, China. FAU - Deng, Yu-Ting AU - Deng YT AD - Key Laboratory of Fishery Drug Development of Ministry of Agriculture and Rural Affairs, Key Laboratory of Aquatic Animal Immune Technology of Guangdong Province, Pearl River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou, China. FAU - Jiang, Lan AU - Jiang L AD - Key Laboratory of Fishery Drug Development of Ministry of Agriculture and Rural Affairs, Key Laboratory of Aquatic Animal Immune Technology of Guangdong Province, Pearl River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou, China. LA - eng PT - Journal Article DEP - 20200622 PL - England TA - Fish Shellfish Immunol JT - Fish & shellfish immunology JID - 9505220 RN - 0 (Fish Proteins) RN - 0 (Lipopolysaccharides) RN - 0 (Receptors, Tumor Necrosis Factor) RN - 0 (Teichoic Acids) RN - 0 (Tumor Necrosis Factor-alpha) RN - 56411-57-5 (lipoteichoic acid) RN - O84C90HH2L (Poly I-C) RN - Aeromonas schubertii RN - Nocardia seriolae SB - IM MH - Aeromonas/physiology MH - Animals MH - Fish Diseases/*immunology MH - Fish Proteins/genetics/immunology MH - Fishes/*genetics/*immunology MH - Gram-Negative Bacterial Infections/immunology/veterinary MH - Head Kidney/immunology MH - Immunity, Innate/*genetics MH - Leukocytes/immunology MH - Lipopolysaccharides/pharmacology MH - Nocardia/physiology MH - Nocardia Infections/immunology/veterinary MH - Poly I-C/pharmacology MH - Receptors, Tumor Necrosis Factor/*genetics/immunology MH - Spleen/immunology MH - Teichoic Acids/pharmacology MH - Tumor Necrosis Factor-alpha/*genetics/immunology OTO - NOTNLM OT - Aeromonas schubertii OT - Nocardia seriolae OT - Snakehead OT - TNF-alpha OT - TNFR EDAT- 2020/06/26 06:00 MHDA- 2021/03/12 06:00 CRDT- 2020/06/26 06:00 PHST- 2020/02/25 00:00 [received] PHST- 2020/05/15 00:00 [revised] PHST- 2020/05/23 00:00 [accepted] PHST- 2020/06/26 06:00 [pubmed] PHST- 2021/03/12 06:00 [medline] PHST- 2020/06/26 06:00 [entrez] AID - S1050-4648(20)30385-5 [pii] AID - 10.1016/j.fsi.2020.05.059 [doi] PST - ppublish SO - Fish Shellfish Immunol. 2020 Sep;104:470-477. doi: 10.1016/j.fsi.2020.05.059. Epub 2020 Jun 22.