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Kochneva A, Efremov D, Murzina SA. Proteins journey-from marine to freshwater ecosystem: blood plasma proteomic profiles of pink salmon Oncorhynchus gorbuscha Walbaum, 1792 during spawning migration. Front Physiol 2023; 14:1216119. [PMID: 37383149 PMCID: PMC10293649 DOI: 10.3389/fphys.2023.1216119] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2023] [Accepted: 06/02/2023] [Indexed: 06/30/2023] Open
Abstract
The pink salmon (Oncorhynchus gorbuscha) is a commercial anadromous fish species of the family Salmonidae. This species has a 2-year life cycle that distinguishes it from other salmonids. It includes the spawning migration from marine to freshwater environments, accompanied by significant physiological and biochemical adaptive changes in the body. This study reveals and describes variability in the blood plasma proteomes of female and male pink salmon collected from three biotopes-marine, estuarine and riverine-that the fish pass through in spawning migration. Identification and comparative analysis of blood plasma protein profiles were performed using proteomics and bioinformatic approaches. The blood proteomes of female and male spawners collected from different biotopes were qualitatively and quantitatively distinguished. Females differed primarily in proteins associated with reproductive system development (certain vitellogenin and choriogenin), lipid transport (fatty acid binding protein) and energy production (fructose 1,6-bisphosphatase), and males in proteins involved in blood coagulation (fibrinogen), immune response (lectins) and reproductive processes (vitellogenin). Differentially expressed sex-specific proteins were implicated in proteolysis (aminopeptidases), platelet activation (β- and γ-chain fibrinogen), cell growth and differentiation (a protein containing the TGF_BETA_2 domain) and lipid transport processes (vitellogenin and apolipoprotein). The results are of both fundamental and practical importance, adding to existing knowledge of the biochemical adaptations to spawning of pink salmon, a representative of economically important migratory fish species.
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Affiliation(s)
- Albina Kochneva
- Environmental Biochemistry Laboratory, Institute of Biology of the Karelian Research Centre of the Russian Academy of Sciences, Petrozavodsk, Russia
| | - Denis Efremov
- Ecology of Fishes and Water Invertebrates Laboratory, Institute of Biology of the Karelian Research Centre of the Russian Academy of Sciences, Petrozavodsk, Russia
| | - Svetlana A. Murzina
- Environmental Biochemistry Laboratory, Institute of Biology of the Karelian Research Centre of the Russian Academy of Sciences, Petrozavodsk, Russia
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Xu H, Zeng YH, Yin WL, Lu HB, Gong XX, Zhang N, Zhang X, Long H, Ren W, Cai XN, Huang AY, Xie ZY. Prevalence of Bacterial Coinfections with Vibrio harveyi in the Industrialized Flow-through Aquaculture Systems in Hainan Province: A Neglected High-Risk Lethal Causative Agent to Hybrid Grouper. Int J Mol Sci 2022; 23:ijms231911628. [PMID: 36232925 PMCID: PMC9570405 DOI: 10.3390/ijms231911628] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2022] [Revised: 09/08/2022] [Accepted: 09/22/2022] [Indexed: 11/16/2022] Open
Abstract
Vibrio harveyi is one of the most serious bacterial pathogens to aquatic animals worldwide. Evidence is mounting that coinfections caused by multiple pathogens are common in nature and can alter the severity of diseases in marine animals. However, bacterial coinfections involving V. harveyi have received little attention in mariculture. In this study, the results of pathogen isolation indicated that bacterial coinfection was a common and overlooked risk for hybrid groupers (♀ Epinephelus polyphekadion × ♂ E. fuscoguttatus) reared in an industrialized flow-through pattern in Hainan Province. The artificial infection in hybrid groupers revealed that coinfections with V. harveyi strain GDH11385 (a serious lethal causative agent to groupers) and other isolated pathogens resulted in higher mortality (46.67%) than infection with strain GDH11385 alone (33.33%), whereas no mortality was observed in single infection with other pathogens. Furthermore, the intestine, liver and spleen of hybrid groupers are target organs for bacterial coinfections involving V. harveyi. Based on the infection patterns found in this study, we propose that V. harveyi may have a specific spatiotemporal expression pattern of virulence genes when infecting the host. Taken together, bacterial coinfection with V. harveyi is a neglected high-risk lethal causative agent to hybrid groupers in the industrialized flow-through aquaculture systems in Hainan Province.
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Affiliation(s)
- He Xu
- State Key Laboratory of Marine Resource Utilization in the South China Sea, Hainan University, Haikou 570228, China
- Laboratory of Development and Utilization of Marine Microbial Resource, Hainan University, Haikou 570228, China
- College of Marine Sciences, Hainan University, Haikou 570228, China
| | - Yan-Hua Zeng
- State Key Laboratory of Marine Resource Utilization in the South China Sea, Hainan University, Haikou 570228, China
- Laboratory of Development and Utilization of Marine Microbial Resource, Hainan University, Haikou 570228, China
| | - Wen-Liang Yin
- State Key Laboratory of Marine Resource Utilization in the South China Sea, Hainan University, Haikou 570228, China
- Laboratory of Development and Utilization of Marine Microbial Resource, Hainan University, Haikou 570228, China
- College of Marine Sciences, Hainan University, Haikou 570228, China
| | - Hong-Bin Lu
- State Key Laboratory of Marine Resource Utilization in the South China Sea, Hainan University, Haikou 570228, China
- Laboratory of Development and Utilization of Marine Microbial Resource, Hainan University, Haikou 570228, China
- College of Marine Sciences, Hainan University, Haikou 570228, China
| | - Xiao-Xiao Gong
- State Key Laboratory of Marine Resource Utilization in the South China Sea, Hainan University, Haikou 570228, China
- Laboratory of Development and Utilization of Marine Microbial Resource, Hainan University, Haikou 570228, China
- College of Marine Sciences, Hainan University, Haikou 570228, China
| | - Na Zhang
- State Key Laboratory of Marine Resource Utilization in the South China Sea, Hainan University, Haikou 570228, China
- Laboratory of Development and Utilization of Marine Microbial Resource, Hainan University, Haikou 570228, China
- College of Marine Sciences, Hainan University, Haikou 570228, China
| | - Xiang Zhang
- State Key Laboratory of Marine Resource Utilization in the South China Sea, Hainan University, Haikou 570228, China
- Laboratory of Development and Utilization of Marine Microbial Resource, Hainan University, Haikou 570228, China
- College of Marine Sciences, Hainan University, Haikou 570228, China
- Key Laboratory of Tropical Hydrobiology and Biotechnology of Hainan Province, Haikou 570228, China
| | - Hao Long
- State Key Laboratory of Marine Resource Utilization in the South China Sea, Hainan University, Haikou 570228, China
- Laboratory of Development and Utilization of Marine Microbial Resource, Hainan University, Haikou 570228, China
| | - Wei Ren
- State Key Laboratory of Marine Resource Utilization in the South China Sea, Hainan University, Haikou 570228, China
- Laboratory of Development and Utilization of Marine Microbial Resource, Hainan University, Haikou 570228, China
- College of Marine Sciences, Hainan University, Haikou 570228, China
- Key Laboratory of Tropical Hydrobiology and Biotechnology of Hainan Province, Haikou 570228, China
| | - Xiao-Ni Cai
- State Key Laboratory of Marine Resource Utilization in the South China Sea, Hainan University, Haikou 570228, China
- Laboratory of Development and Utilization of Marine Microbial Resource, Hainan University, Haikou 570228, China
- College of Marine Sciences, Hainan University, Haikou 570228, China
- Key Laboratory of Tropical Hydrobiology and Biotechnology of Hainan Province, Haikou 570228, China
| | - Ai-You Huang
- State Key Laboratory of Marine Resource Utilization in the South China Sea, Hainan University, Haikou 570228, China
- Laboratory of Development and Utilization of Marine Microbial Resource, Hainan University, Haikou 570228, China
- College of Marine Sciences, Hainan University, Haikou 570228, China
- Key Laboratory of Tropical Hydrobiology and Biotechnology of Hainan Province, Haikou 570228, China
| | - Zhen-Yu Xie
- State Key Laboratory of Marine Resource Utilization in the South China Sea, Hainan University, Haikou 570228, China
- Laboratory of Development and Utilization of Marine Microbial Resource, Hainan University, Haikou 570228, China
- College of Marine Sciences, Hainan University, Haikou 570228, China
- Key Laboratory of Tropical Hydrobiology and Biotechnology of Hainan Province, Haikou 570228, China
- Correspondence: ; Tel.: +86-136-4866-9016
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Commensal and Opportunistic Bacteria Present in the Microbiota in Atlantic Cod ( Gadus morhua) Larvae Differentially Alter the Hosts' Innate Immune Responses. Microorganisms 2021; 10:microorganisms10010024. [PMID: 35056473 PMCID: PMC8779962 DOI: 10.3390/microorganisms10010024] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2021] [Revised: 12/12/2021] [Accepted: 12/21/2021] [Indexed: 12/28/2022] Open
Abstract
The roles of host-associated bacteria have gained attention lately, and we now recognise that the microbiota is essential in processes such as digestion, development of the immune system and gut function. In this study, Atlantic cod larvae were reared under germ-free, gnotobiotic and conventional conditions. Water and fish microbiota were characterised by 16S rRNA gene analyses. The cod larvae’s transcriptional responses to the different microbial conditions were analysed by a custom Agilent 44 k oligo microarray. Gut development was assessed by transmission electron microscopy (TEM). Water and fish microbiota differed significantly in the conventional treatment and were dominated by different fast-growing bacteria. Our study indicates that components of the innate immune system of cod larvae are downregulated by the presence of non-pathogenic bacteria, and thus may be turned on by default in the early larval stages. We see indications of decreased nutrient uptake in the absence of bacteria. The bacteria also influence the gut morphology, reflected in shorter microvilli with higher density in the conventional larvae than in the germ-free larvae. The fact that the microbiota alters innate immune responses and gut morphology demonstrates its important role in marine larval development.
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Li Y, Zhang W, Zhao Y, Zhu T, Li Q. Gut-derived Shewanella induces the differentially expressed proteins in leukocytes of Lampetra japonica. J Proteomics 2021; 236:104123. [PMID: 33540063 DOI: 10.1016/j.jprot.2021.104123] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2020] [Revised: 12/21/2020] [Accepted: 01/19/2021] [Indexed: 12/12/2022]
Abstract
Lampreys, one of the most basal jawless vertebrates, are an excellent animal model for investigating vertebrate evolution, embryonic development, and the origin of adaptive immunity. Gut-derived Shewanella strain was isolated and then proved to induce adaptive immunity response in lampreys. Using Shewanella as the antigen, the effect of gut-derived Shewanella on lamprey leukocyte proteome was investigated via label-free liquid chromatography-tandem mass spectrometry for quantitative proteomics analysis. Twenty-five differentially expressed proteins in lamprey leukocytes were identified with significant differences. The differentially expressed proteins were associated with several biological processes. Among these proteins, the signal transducer and activator of transcription 3 (STAT3) was significantly upregulated in leukocytes after Shewanella immunization, indicating that lamprey STAT3 (L-STAT3) was involved in Shewanella-lamprey interactions. Expression pattern analysis revealed that L-STAT3 was mainly distributed in the cytoplasm and upregulated in other tissues after Shewanella immunization. Moreover, L-STAT3 overexpression could promote HEK-293 T and HeLa cell proliferation. However, the functions of L-STAT3 in the adaptive immune response of lamprey induced by gut-derived Shewanella remain to be explored. Overall, the identification of leukocyte proteins involved in Shewanella-lamprey interactions provides important information for understanding the variable lymphocyte receptor-based adaptive immune signal pathways in lampreys. SIGNIFICANCE: Lampreys are considered to be an excellent animal model for studying the origin and development of adaptive immune systems in vertebrates. Lampreys use variable lymphocyte receptors (VLRs) in recognizing antigens. However, the understanding of the VLR-based adaptive immune signal pathways in lampreys remains unclear. Intestinal bacteria could regulate the development of host immune systems. The attempts of inducing lamprey leukocyte differentially expressed proteins using the gut bacterial as the antigen will supply an promising avenue to explore the molecular mechanism of the intestinal bacteria interaction with it's host. Also, the identification of differentially expressed proteins involved in interactions between gut-derived Shewanella and lamprey will supply clues for understanding the variable lymphocyte receptor-based adaptive immune signal pathways in lampreys.
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Affiliation(s)
- Yingying Li
- School of Life Science, Liaoning Normal University, Dalian, China; Lamprey Research Center, Liaoning Normal University, Dalian, China; Collaborative Innovation Center of Seafood Deep Processing, Dalian Polytechnic University, Dalian, China.
| | - Wenying Zhang
- School of Life Science, Liaoning Normal University, Dalian, China; Lamprey Research Center, Liaoning Normal University, Dalian, China
| | - Yihua Zhao
- School of Life Science, Liaoning Normal University, Dalian, China; Lamprey Research Center, Liaoning Normal University, Dalian, China
| | - Ting Zhu
- School of Life Science, Liaoning Normal University, Dalian, China; Lamprey Research Center, Liaoning Normal University, Dalian, China; Collaborative Innovation Center of Seafood Deep Processing, Dalian Polytechnic University, Dalian, China
| | - Qingwei Li
- School of Life Science, Liaoning Normal University, Dalian, China; Lamprey Research Center, Liaoning Normal University, Dalian, China; Collaborative Innovation Center of Seafood Deep Processing, Dalian Polytechnic University, Dalian, China.
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Chai Y, Cong B, Yu S, Liu Y, Man X, Wang L, Zhu Q. Effect of a LECT2 on the immune response of peritoneal lecukocytes against Vibrio anguillarum in roughskin sculpin. FISH & SHELLFISH IMMUNOLOGY 2018; 74:620-626. [PMID: 29331349 DOI: 10.1016/j.fsi.2017.12.069] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/09/2017] [Revised: 12/28/2017] [Accepted: 12/31/2017] [Indexed: 06/07/2023]
Abstract
Leukocyte cell-derived chemotaxin 2 (LECT2) is a multi-functional protein that is mainly synthesized by the liver. However, its role in roughskin scalping is less known. Here, we cloned a leukocyte cell-derived chemotaxin 2 (TfLECT2) genes in the liver of roughskin scalping, Trachidermus fasciatus, and studied its possible role involved in the immune response against Vibrio anguillarum (V. anguillarum) of peritoneal lecukocytes under in vivo conditions. The cDNA sequence of TfLECT2 is 566 bp in size. Its deduced amino acid (aa) sequence comprises 151 residues, of which the first 16 residues form a putative signal peptide and 101 residues compose a typical peptidase M23 domain in the C-terminal region. The domain structure is conserved in all LECT2 proteins, which suggests a close phylogenetic relationship between TfLECT2 and LECT2 in other fish species. Real-time quantitative PCR analysis revealed that TfLECT2 gene expression was dramatically increased in liver after V. anguillarum stimulation. Subsequently, TfLECT2 was prokaryotic expressed and purified to prepare anti-TfLECT2 antibody. After V. anguillarum challenge, leukocytes recruitment and LECT2 levels in peritoneal exudates were increased, and positively correlated with each other. Moreover, recombinant TfLECT2 administration significantly improved immune responses after infection, principally in stimulating the recruitment, phagocytosis and respiratory burst of leukocytes at the site of infection; however, anti-TfLECT2 treatment neutralized these abilities. Therefore, TfLECT2 may trigger the early immune events of peritoneal leukocytes and it will be useful to induce innate immune response of fish.
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Affiliation(s)
- Yingmei Chai
- Marine College, Shandong University (Weihai), Weihai 264209, PR China.
| | - Bailin Cong
- The First Institute of Oceanography, Marine Ecological Center, State Oceanic Administration, Qingdao, 266061, PR China
| | - Shanshan Yu
- Marine College, Shandong University (Weihai), Weihai 264209, PR China
| | - Yingying Liu
- Marine College, Shandong University (Weihai), Weihai 264209, PR China
| | - Xin Man
- Marine College, Shandong University (Weihai), Weihai 264209, PR China
| | - Lujie Wang
- Marine College, Shandong University (Weihai), Weihai 264209, PR China
| | - Qian Zhu
- Marine College, Shandong University (Weihai), Weihai 264209, PR China.
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Lu G, Yu Z, Lu M, Liu D, Wang F, Wu Y, Liu Y, Liu C, Wang L, Song L. The self-activation and LPS binding activity of executioner caspase-1 in oyster Crassostrea gigas. DEVELOPMENTAL AND COMPARATIVE IMMUNOLOGY 2017; 77:330-339. [PMID: 28888538 DOI: 10.1016/j.dci.2017.09.002] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/06/2017] [Revised: 09/05/2017] [Accepted: 09/05/2017] [Indexed: 06/07/2023]
Abstract
Executioner caspases play important roles in apoptotic pathway and immune defense, which is considered to coordinate the execution phase of apoptosis by cleaving multiple structural and repair proteins. However, the knowledge about the activation mechanism and function of executioner caspases in mollusks, especially marine bivalves is limited. In the present study, the full-length cDNA sequence of caspase-1 was cloned from oyster Crassostrea gigas, which encoded a predicted protein containing a small subunit (p10) and large subunit (p20) with a conserved caspase active site QACRG similar to that of human executioner caspase-3/7. SDS-polyacrylamide gel electrophoresis and western blot results demonstrated that the CgCaspase-1 zymogen could be cleaved into p20p10, p20 and p10 in prokaryotic expression systems, and the C-terminus of CgCaspase-1 was also cleaved into p20 and p10. Both of the recombinant CgCaspase-1 (rCgCaspase-1) and the C-terminus of CgCaspase-1 (rCgCaspase-1-C) exhibited similar caspase activity towards proteolytic substrate Ac-DMQD-pNA and Ac-DEVD-pNA. However, the recombinant N-terminus of CgCaspase-1 (rCgCaspase-1-N) did not display any caspase activity. Moreover, the inhibitor of both caspase-3/7 and pan-caspase could significantly inhibit the proteolytic activity of rCgCaspase-1. The strong binding activities towards lipopolysaccharide (LPS) of both rCgCaspase-1 and rCgCaspase-1-C were revealed by ELISA techniques and western blotting. A high level of CgCaspase-1 mRNA transcripts was detected in the gills and hemocytes by quantitative real-time PCR, and the CgCaspase-1 protein was mainly located in the cytoplasm of oyster hemocytes by immunofluorescence assay. These results collectively suggested that CgCaspase-1 was a homolog of executioner caspase-3/7, which could be self-activated through proteolytic cleavage in prokaryotic expression systems, and performed caspase and LPS binding activities in the innate immune response of oyster.
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Affiliation(s)
- Guangxia Lu
- Liaoning Key Laboratory of Marine Animal Immunology and Disease Control, Dalian Ocean University, Dalian 116023, China; Laboratory of Marine Fisheries Science and Food Production Process, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266071, China
| | - Zichao Yu
- Liaoning Key Laboratory of Marine Animal Immunology and Disease Control, Dalian Ocean University, Dalian 116023, China
| | - Mengmeng Lu
- Liaoning Key Laboratory of Marine Animal Immunology and Disease Control, Dalian Ocean University, Dalian 116023, China
| | - Dongyang Liu
- Liaoning Key Laboratory of Marine Animal Immunology and Disease Control, Dalian Ocean University, Dalian 116023, China
| | - Feifei Wang
- Liaoning Key Laboratory of Marine Animal Immunology and Disease Control, Dalian Ocean University, Dalian 116023, China
| | - Yichen Wu
- Liaoning Key Laboratory of Marine Animal Immunology and Disease Control, Dalian Ocean University, Dalian 116023, China
| | - Yu Liu
- Liaoning Key Laboratory of Marine Animal Immunology and Disease Control, Dalian Ocean University, Dalian 116023, China
| | - Chao Liu
- Liaoning Key Laboratory of Marine Animal Immunology and Disease Control, Dalian Ocean University, Dalian 116023, China
| | - Lingling Wang
- Liaoning Key Laboratory of Marine Animal Immunology and Disease Control, Dalian Ocean University, Dalian 116023, China; Laboratory of Marine Fisheries Science and Food Production Process, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266071, China
| | - Linsheng Song
- Liaoning Key Laboratory of Marine Animal Immunology and Disease Control, Dalian Ocean University, Dalian 116023, China; Laboratory of Marine Fisheries Science and Food Production Process, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266071, China.
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Castro-Osses D, Carrera-Naipil C, Gallardo-Escárate C, Gonçalves AT. Functional diets modulate the acute phase protein response in Oncorhynchus mykiss subjected to chronic stress and challenged with Vibrio anguillarum. FISH & SHELLFISH IMMUNOLOGY 2017; 66:62-70. [PMID: 28476670 DOI: 10.1016/j.fsi.2017.05.001] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/29/2016] [Revised: 04/21/2017] [Accepted: 05/01/2017] [Indexed: 06/07/2023]
Abstract
The acute phase response to pathogens alters the production of proinflammatory cytokines that, in turn, activate the synthesis of acute phase proteins. These proteins neutralize, prevent, and indicate tissue damage, thereby influencing the specific immune response and allowing the organism to regain homeostasis. Functional diets based in pre- and probiotics are used in aquaculture to improve fish health and resistance to diseases, but there is an information gap on the mechanisms involved in these effects and if these diets are efficient when fish are raised under high stocking densities. This study aimed an evaluation of the acute phase response in Oncorhynchus mykiss fed functional diets supplemented with pre- and probiotics (i.e. mannan-oligosaccharides and Saccharomyces cerevisiae, respectively) and challenged by either Vibrio anguillarum or chronic stress via maintenance under high stocking densities. For this, the relative expression of acute phase response related genes in liver, and of inflammatory response related genes in head kidney was evaluated by RT-qPCR. The supplemented diets differentially modulated the acute phase protein response to the assessed challenge conditions, specifically evidencing an overexpression of the genes HAPT, SAA, LECT2, and IL-1β under chronic stress and of HAPT, IL-1β, IL8, and LECT2 at 24 h post-challenge with V. anguillarum. The observed early-stage regulation of acute phase proteins and of the immune response by the probiotic S. cerevisiae and by prebiotic mannan-oligosaccharides suggests that both supplements have high immunostimulatory potentials for fish farmed under high stocking densities.
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Affiliation(s)
- Darlyng Castro-Osses
- Laboratory of Biotechnology and Aquatic Genomics, Interdisciplinary Center for Aquaculture Research (INCAR), Department of Oceanography, University of Concepción, Víctor Lamas 1290, 4030000 Concepción, Chile
| | - Crisleri Carrera-Naipil
- Laboratory of Biotechnology and Aquatic Genomics, Interdisciplinary Center for Aquaculture Research (INCAR), Department of Oceanography, University of Concepción, Víctor Lamas 1290, 4030000 Concepción, Chile
| | - Cristian Gallardo-Escárate
- Laboratory of Biotechnology and Aquatic Genomics, Interdisciplinary Center for Aquaculture Research (INCAR), Department of Oceanography, University of Concepción, Víctor Lamas 1290, 4030000 Concepción, Chile
| | - Ana Teresa Gonçalves
- Laboratory of Biotechnology and Aquatic Genomics, Interdisciplinary Center for Aquaculture Research (INCAR), Department of Oceanography, University of Concepción, Víctor Lamas 1290, 4030000 Concepción, Chile.
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Xu Q, Chen Y, Tong YY, Huang ZY, Zhao WM, Duan XJ, Zhang Y, Li X, Chang GB, Chen GH. Identification and expression analysis of the leukocyte cell-derived chemotaxin-2 (LECT2) gene in duck (Anas platyrhynchos). Gene 2014; 533:280-5. [DOI: 10.1016/j.gene.2013.09.047] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2013] [Revised: 09/01/2013] [Accepted: 09/12/2013] [Indexed: 11/30/2022]
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9
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Wang TT, Song XH, Bao GM, Zhao LX, Yu X, Zhao J. Molecular characterization, expression analysis, and biological effects of interleukin-8 in grass carp Ctenopharyngodon idellus. FISH & SHELLFISH IMMUNOLOGY 2013; 35:1421-1432. [PMID: 23994423 DOI: 10.1016/j.fsi.2013.08.006] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/04/2012] [Revised: 08/05/2013] [Accepted: 08/08/2013] [Indexed: 06/02/2023]
Abstract
Interleukin-8 (IL-8) is a CXC chemokine that plays key regulatory roles in the immune and inflammatory responses implicated in many human diseases. In this study, we identified and characterized an IL-8 homologue from the grass carp, Ctenopharyngodon idellus. A sequence alignment of the full-length cDNA and genomic DNA showed that the exon/intron organization of grass carp IL-8 (gcIL-8) is identical to those of other known CXC chemokine genes. A multiple alignment analysis showed that gcIL-8 is an ELR(-)CXC chemokine, and its deduced amino acid sequence shares 81% and 36% identity with common carp IL-8s L1 (GenBank ID: ABE47600) and L2 (GenBank ID: AB470924), respectively, suggesting that it belongs to the lineage 1 group of fish IL-8 proteins. On a phylogenetic tree, gcIL-8 clustered with other teleost IL-8 proteins to form a fish-specific clade, clearly distinct from those of bird, mammal, and amphibian proteins. Real-time quantitative PCR analysis indicated that gcIL-8 is differentially expressed in various tissues under normal conditions and that the expression of gcIL-8 mRNA in immune-related tissues is clearly upregulated by Aeromonas hydrophila infection. To explore the biological effects of gcIL-8, we produced a recombinant protein, rgcIL-8, in a prokaryotic expression system. Purified rgcIL-8 was confirmed to be chemoattractive for head kidney neutrophils and mononuclear leukocytes in vitro. Our histopathological study also revealed that rgcIL-8 exerts proinflammatory effects by inducing neutrophil infiltration and erythrocyte extravasation. Overall, these results suggest that IL-8 is crucially involved in the inflammatory responses of fish.
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Affiliation(s)
- Ting-Ting Wang
- Department of Hydrobiology, School of Biology and Basic Medical Sciences, Soochow University, 199 Ren'ai Road, Suzhou, Jiangsu 215123, China
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Wan Q, Wang L, Su J, Yang C, Peng L, Chen L. Genetic structure, polymorphism identification of LGP2 gene and their relationship with the resistance/susceptibility to GCRV in grass carp, Ctenopharyngodon idella. Gene 2013; 521:166-75. [DOI: 10.1016/j.gene.2013.03.016] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2012] [Accepted: 03/07/2013] [Indexed: 01/31/2023]
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Lu XJ, Hang XY, Yin L, He YQ, Chen J, Shi YH, Li CH. Sequencing of the first ayu (Plecoglossus altivelis) macrophage transcriptome and microarray development for investigation the effect of LECT2 on macrophages. FISH & SHELLFISH IMMUNOLOGY 2013; 34:497-504. [PMID: 23257205 DOI: 10.1016/j.fsi.2012.11.047] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/21/2012] [Revised: 11/26/2012] [Accepted: 11/27/2012] [Indexed: 06/01/2023]
Abstract
Macrophages play an important role in first-line host defense of innate immune in fishes. However, it is difficult to investigate cellular mechanism of immune response in fish species with little genomic information available. Here we present the first use of RNA-Sequencing to study the macrophage transcriptome of ayu, Plecoglossus altivelis, which is an economically important fish in East Asia. De novo assembly generated 49,808 non-redundant consensus sequences, among which 23,490 transcripts found respective coding sequences. 15,707 transcripts are predicted to be involved in known metabolic or signaling pathways. The sequences were then used to develop a microarray for measurement the effect of recombinant LECT2 on ayu macrophages. LECT2 altered expression of a variety of genes mainly implicated in actin cytoskeleton, pattern recognition receptors and cytokines. Meanwhile, LECT2 enhanced phagocytosis, bacterial killing, and respiratory burst in ayu macrophages, which supported the thought derived from the microarray data that LECT2 activates macrophages. In conclusion, our results contribute to understanding the specific regulation mechanism of LECT2 in macrophage activation, and the combination of transcriptome analysis and microarray assay is a good method for screening a special tissue or cell response to a stimulus or pathogen in non-model fish species.
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Affiliation(s)
- Xin-Jiang Lu
- School of Marine Sciences, Ningbo University, Ningbo City, Zhejiang Province 315211, China
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