PMID- 31846686 OWN - NLM STAT- MEDLINE DCOM- 20210621 LR - 20210621 IS - 1879-0089 (Electronic) IS - 0145-305X (Linking) VI - 105 DP - 2020 Apr TI - Functions of TNF-alpha1 and TNF-alpha2 in large yellow croaker (Larimichthys crocea) in monocyte/macrophage activation. PG - 103576 LID - S0145-305X(19)30557-9 [pii] LID - 10.1016/j.dci.2019.103576 [doi] AB - Tumor necrosis factor-alpha (TNF-alpha) plays crucial roles in cell development, proliferation, apoptosis, inflammation, and immunity. TNF-alpha genes have been identified in various fish species, however, their biological functions remain to be further clarified. In this study, we identified a novel TNF-alpha homologue (LcTNF-alpha2) from large yellow croaker (Larimichthys crocea), which shares a low amino acid sequence identity to the previously reported large yellow croaker TNF-alpha (LcTNF-alpha1). The open reading frame of LcTNF-alpha2 is 714 nucleotides long, encoding a peptide of 237 amino acids (aa). The deduced LcTNF-alpha2 protein contains a 23-aa transmembrane region, a TACE restriction site at residues T(71)/L(72), a TNF family signature (I(108)- F(135)), and two conserved cysteine residues (C(39) and C(179)), as found in other known TNF-alpha sequences. Both LcTNF-alpha1 and LcTNF-alpha2 genes were constitutively expressed in all examined tissues and significantly up-regulated in the spleen and head kidney by Vibrio alginolyticus. Their transcripts were also detected in primary head kidney monocytes/macrophages (MO/Mvarphis), lymphocytes (PKLs), granulocytes (PKGs), and large yellow croaker head kidney (LYCK) cell line and significantly increased in these cell types by inactivated Vibrio alginolyticus. Recombinant LcTNF-alpha1 and LcTNF-alpha2 proteins (rLcTNF-alpha1 and rLcTNF-alpha2) produced in Pichia pastoris not only significantly increased the production of reactive oxygen species (ROS), but also promoted the expression of proinflammatory cytokines (IL-1beta, IL-6,IL-8, and TNF-alpha1) in MO/Mvarphis from large yellow croaker. Even more, after stimulation with rLcTNF-alpha1 and rLcTNF-alpha2, the production of nitrogen oxide (NO) and the expression of inducible NO synthase (iNOS) gene were significantly up-regulated. However, only rLcTNF-alpha1 remarkedly enhanced the phagocytosis of MO/Mvarphis and increased the expression of TNF-alpha2 in MO/Mvarphis. These results therefore indicated that LcTNF-alpha1 and LcTNF-alpha2 both play roles in promoting activation of head kidney MO/Mvarphis. CI - Copyright (c) 2019 Elsevier Ltd. All rights reserved. FAU - Huang, Mingyue AU - Huang M AD - Key Laboratory of Marine Biotechnology of Fujian Province, Institute of Oceanology, Fujian Agriculture and Forestry University, Fuzhou, 350002, China. FAU - Mu, Pengfei AU - Mu P AD - Key Laboratory of Marine Biotechnology of Fujian Province, Institute of Oceanology, Fujian Agriculture and Forestry University, Fuzhou, 350002, China; College of Ocean and Earth Sciences, Xiamen University, Xiamen, 361102, China. FAU - Li, Xiaofeng AU - Li X AD - Key Laboratory of Marine Biotechnology of Fujian Province, Institute of Oceanology, Fujian Agriculture and Forestry University, Fuzhou, 350002, China. FAU - Ren, Qiulei AU - Ren Q AD - Key Laboratory of Marine Biotechnology of Fujian Province, Institute of Oceanology, Fujian Agriculture and Forestry University, Fuzhou, 350002, China. FAU - Zhang, Xiang-Yang AU - Zhang XY AD - Key Laboratory of Marine Biotechnology of Fujian Province, Institute of Oceanology, Fujian Agriculture and Forestry University, Fuzhou, 350002, China. FAU - Mu, Yinnan AU - Mu Y AD - Key Laboratory of Marine Biotechnology of Fujian Province, Institute of Oceanology, Fujian Agriculture and Forestry University, Fuzhou, 350002, China. FAU - Chen, Xinhua AU - Chen X AD - Key Laboratory of Marine Biotechnology of Fujian Province, Institute of Oceanology, Fujian Agriculture and Forestry University, Fuzhou, 350002, China; Laboratory for Marine Biology and Biotechnology, Qingdao National Laboratory for Marine Science and Technology, Qingdao, 266071, China. Electronic address: chenxinhua@tio.org.cn. LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20191214 PL - United States TA - Dev Comp Immunol JT - Developmental and comparative immunology JID - 7708205 RN - 0 (Cytokines) RN - 0 (Fish Proteins) RN - 0 (Tumor Necrosis Factor-alpha) SB - IM MH - Animals MH - Cytokines/metabolism MH - Fish Proteins/*genetics MH - Immunity, Innate MH - Macrophage Activation/genetics MH - Macrophages/*immunology MH - Monocytes/*immunology MH - Perciformes/*immunology MH - Phylogeny MH - Sequence Alignment MH - Sequence Homology, Nucleic Acid MH - Transcriptome MH - Tumor Necrosis Factor-alpha/*genetics MH - Vibrio Infections/*immunology MH - Vibrio alginolyticus/*physiology OTO - NOTNLM OT - Inflammatory response OT - Large yellow croaker (Larimichthys crocea) OT - MO/Mvarphis activation OT - TNF-alpha1 OT - TNF-alpha2 COIS- Declaration of competing interest The authors have no conflicting commercial or financial interest in publishing this paper. EDAT- 2019/12/18 06:00 MHDA- 2021/06/22 06:00 CRDT- 2019/12/18 06:00 PHST- 2019/11/09 00:00 [received] PHST- 2019/12/13 00:00 [revised] PHST- 2019/12/13 00:00 [accepted] PHST- 2019/12/18 06:00 [pubmed] PHST- 2021/06/22 06:00 [medline] PHST- 2019/12/18 06:00 [entrez] AID - S0145-305X(19)30557-9 [pii] AID - 10.1016/j.dci.2019.103576 [doi] PST - ppublish SO - Dev Comp Immunol. 2020 Apr;105:103576. doi: 10.1016/j.dci.2019.103576. Epub 2019 Dec 14.