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Jiang XX, Tang ZR, Li ZP, Zhang GR, Zhou X, Ma XF, Wei KJ. Molecular characterization, expression analysis and function identification of Pf_IL-12p35, Pf_IL-23p19 and Pf_IL-12p40 genes in yellow catfish (Pelteobagrus fulvidraco). FISH & SHELLFISH IMMUNOLOGY 2024; 150:109623. [PMID: 38750705 DOI: 10.1016/j.fsi.2024.109623] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/21/2024] [Revised: 05/05/2024] [Accepted: 05/11/2024] [Indexed: 05/23/2024]
Abstract
The interleukin-12 (IL-12) family is a class of heterodimeric cytokines that play crucial roles in pro-inflammatory and pro-stimulatory responses. Although some IL-12 and IL-23 paralogues have been found in fish, their functional activity in fish remains poorly understood. In this study, Pf_IL-12p35a/b, Pf_IL-23p19 and Pf_IL-12p40a/b/c genes were cloned from yellow catfish (Pelteobagrus fulvidraco), four α-helices were found in Pf_IL-12p35a/b and Pf_IL-23p19. The transcripts of these six genes were relatively high in mucus and immune tissues of healthy individuals, and in gill leukocytes. Following Edwardsiella ictaluri infection, Pf_IL-12p35a/b and Pf_IL-23p19 mRNAs were induced in brain and kidney (or head kidney), Pf_IL-12p40a mRNA was induced in gill, and Pf_IL-12p40b/c mRNAs were induced in brain and liver (or skin). The mRNA expression of these genes in PBLs was induced by phytohaemagglutinin (PHA) and polyinosinic-polycytidylic acid (poly I:C), while lipopolysaccharides (LPS) induced the mRNA expression of Pf_IL-12p35a and Pf_IL-12p40b/c in PBLs. After stimulation with recombinant (r) Pf_IL-12 and rPf_IL-23 subunit proteins, either alone or in combination, mRNA expression patterns of genes related to T helper cell development exhibited distinct differences. The results suggest that Pf_IL-12 and Pf_IL-23 subunits may play important roles in regulating immune responses to pathogens and T helper cell development.
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Affiliation(s)
- Xin-Xin Jiang
- Key Laboratory of Freshwater Animal Breeding, Ministry of Agriculture and Rural Affairs, College of Fisheries, Huazhong Agricultural University, Wuhan, 430070, PR China
| | - Zi-Rui Tang
- Key Laboratory of Freshwater Animal Breeding, Ministry of Agriculture and Rural Affairs, College of Fisheries, Huazhong Agricultural University, Wuhan, 430070, PR China
| | - Zhang-Ping Li
- Key Laboratory of Freshwater Animal Breeding, Ministry of Agriculture and Rural Affairs, College of Fisheries, Huazhong Agricultural University, Wuhan, 430070, PR China
| | - Gui-Rong Zhang
- Key Laboratory of Freshwater Animal Breeding, Ministry of Agriculture and Rural Affairs, College of Fisheries, Huazhong Agricultural University, Wuhan, 430070, PR China
| | - Xu Zhou
- National and Provincial Joint Laboratory of Exploration and Utilization of Marine Aquatic Genetic Resources, National Engineering Research Center of Marine Facilities Aquaculture, School of Marine Science and Technology, Zhejiang Ocean University, Zhoushan, 316022, PR China
| | - Xu-Fa Ma
- Key Laboratory of Freshwater Animal Breeding, Ministry of Agriculture and Rural Affairs, College of Fisheries, Huazhong Agricultural University, Wuhan, 430070, PR China
| | - Kai-Jian Wei
- Key Laboratory of Freshwater Animal Breeding, Ministry of Agriculture and Rural Affairs, College of Fisheries, Huazhong Agricultural University, Wuhan, 430070, PR China.
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Michael P, Panchavarnam S, Bagthasingh C, Palaniappan S, Velu R, Mohaideenpitchai MM, Palraj M, Muthumariyapan S, David EP. Innate immune response of snakehead fish to Indian strain of snakehead rhabdovirus (SHRV-In) infection and the infectivity potential of the virus to other freshwater fishes. FISH & SHELLFISH IMMUNOLOGY 2024; 149:109577. [PMID: 38643957 DOI: 10.1016/j.fsi.2024.109577] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/30/2023] [Revised: 03/08/2024] [Accepted: 04/18/2024] [Indexed: 04/23/2024]
Abstract
A new virus known as snakehead rhabdovirus (SHRV-In) was discovered in South India in striped snakehead (Channa striata) that had hemorrhagic patches and cutaneous ulcerations. The virus is the most potentially harmful pathogen of snakehead because it could cause 100% mortality within 5 days. The goal of the current investigation was to evaluate the infectivity of rhabdovirus in freshwater fishes and to analyze the immune response in snakehead fish after challenge with SHRV-In. The infectivity study of SHRV-In against three freshwater fish such as tilapia, grass carp and loach showed that the virus could not induce mortality in any of them. Snakehead fish challenged with SHRV-In showed significant (p < 0.05) changes in haematological parameters such as red blood cell (RBC), haemoglobin (HGB), haematocrit (HCT), mean corpuscular haemoglobin concentration (MCHC), mean corpuscular volume (MCV), mean corpuscular haemoglobin (MCH), white blood cell (WBC), total platelet (PLT) counts, mean platelet volume (MPV) and immunological markers such as respiratory burst, superoxide dismutase, catalase activity and myeloperoxidase activity at 6, 12, 24 and 48 hpi. Real time PCR was executed to examine the expression profile of innate immune genes such as IRF-7, IL-8 and IL-12 in Snakehead fish at 6, 12, 24 and 48 h post SHRV-In infection. Immune gene expression of IRF-7, IL-8 and IL-12 were up-regulated in the spleen when compared to kidney at 6 and 12 hpi. However, the expression level of all the genes was down-regulated at 24 and 48 hpi. The down regulation of innate immune genes after 24 hpi in these tissues may be the result of increased multiplication of SHRV-In by interfering with the immune signaling pathway.
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Affiliation(s)
- Priyadharshini Michael
- Department of Fish Pathology and Health Management, Fisheries College and Research Institute, Thoothukudi, 628 008, Tamil Nadu Dr.J.Jayalalithaa Fisheries University, Tamil Nadu, India
| | - Sivasankar Panchavarnam
- Department of Fish Pathology and Health Management, Fisheries College and Research Institute, Thoothukudi, 628 008, Tamil Nadu Dr.J.Jayalalithaa Fisheries University, Tamil Nadu, India.
| | - Chrisolite Bagthasingh
- Department of Fish Pathology and Health Management, Fisheries College and Research Institute, Thoothukudi, 628 008, Tamil Nadu Dr.J.Jayalalithaa Fisheries University, Tamil Nadu, India
| | - Subash Palaniappan
- Department of Fish Pathology and Health Management, Fisheries College and Research Institute, Thoothukudi, 628 008, Tamil Nadu Dr.J.Jayalalithaa Fisheries University, Tamil Nadu, India
| | - Rani Velu
- Department of Fish Pathology and Health Management, Fisheries College and Research Institute, Thoothukudi, 628 008, Tamil Nadu Dr.J.Jayalalithaa Fisheries University, Tamil Nadu, India
| | - Mohamed Mansoor Mohaideenpitchai
- Department of Fish Pathology and Health Management, Fisheries College and Research Institute, Thoothukudi, 628 008, Tamil Nadu Dr.J.Jayalalithaa Fisheries University, Tamil Nadu, India
| | - Mageshkumar Palraj
- Department of Fish Pathology and Health Management, Fisheries College and Research Institute, Thoothukudi, 628 008, Tamil Nadu Dr.J.Jayalalithaa Fisheries University, Tamil Nadu, India
| | - Selvamagheswaran Muthumariyapan
- Department of Fish Pathology and Health Management, Fisheries College and Research Institute, Thoothukudi, 628 008, Tamil Nadu Dr.J.Jayalalithaa Fisheries University, Tamil Nadu, India
| | - Evangelin Paripoorana David
- Department of Fish Pathology and Health Management, Fisheries College and Research Institute, Thoothukudi, 628 008, Tamil Nadu Dr.J.Jayalalithaa Fisheries University, Tamil Nadu, India
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Fukada H, Senzui A, Kimoto K, Tsuru K, Kiyabu Y. Evaluation of the in vivo and in vitro interleukin-12 p40 and p35 subunit response in yellowtail ( Seriola quinqueradiata) to heat-killed Lactobacillus plantarum strain L-137 (HK L-137) supplementation, and immersion challenge with Lactococcus garvieae. FISH AND SHELLFISH IMMUNOLOGY REPORTS 2023; 4:100095. [PMID: 37168607 PMCID: PMC10165394 DOI: 10.1016/j.fsirep.2023.100095] [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: 01/14/2023] [Revised: 04/06/2023] [Accepted: 04/23/2023] [Indexed: 05/13/2023] Open
Abstract
Dietary supplementation of immunostimulants might be effective to reduce the economic losses due to infectious diseases and the use of antibiotics in aquaculture. To investigate the immune response of interleukin-12 (IL-12) in yellowtail Seriola quinqueradiata to heat-killed Lactobacillus plantarum strain L-137 (HK L-137), we performed a leukocyte culture, feeding trial with diets containing L-137 and an immersion challenge with Lactococcus garvieae. IL-12 (IL-12p70) is a heterodimeric cytokine composed of IL-12p35 and IL-12p40 subunits. In the yellowtail-leukocyte culture, HK L-137 treatment stimulated the mRNA expression of one IL12p35 subunit (p35a) and all IL12p40 subunits (p40a, p40b, and p40c) in a dose-dependent manner. Furthermore, mRNA expression of type-I helper (Th-1) cytokine (tumor necrosis factor α, TNF-α, and interferon γ, IFN-γ) was also stimulated by HK L-137. After 6 weeks of feeding yellowtails with diets containing 0, 20, and 100 ppm of HK L-137, the mRNA expression of p35a and p40b in the spleen leukocytes increased with the dietary concentration of HK L-137, and that of p40b, p40c, and ifng in the head kidney leukocytes were the highest in the 20 ppm HK L-137 group. Survival rates in the 20 ppm HK L-137 group after immersion challenge with L. garvieae were significantly higher than the control (0 ppm of HK L-137). The 100 ppm HK L-137 group did not significantly suppress mortality. HK L-137 showed immunostimulant activity by increasing the expression of il-12, tnfa, and ifng mRNA in both in vitro and in vivo tests in yellowtail. Our results suggest that dietary supplementation with 20 ppm HK L-137 is the most efficient dose for improving immunity in yellowtail. Furthermore, a high dose of HK L-137 and/or long-term feeding of a diet containing HK L-137 might suppress the immune response, which probably decreases the survival rate of fish. To maintain a high immune response in yellowtail, the optimal dietary concentration of HK L-137 and/or feeding regime should be investigated further.
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Affiliation(s)
- Haruhisa Fukada
- Faculty of Agriculture and Marine Science, Kochi University, 200 Monobe, Nankoku, Kochi 783-8502, Japan
| | - Ayaka Senzui
- Bioresource Production Science, The United Graduate School of Agricultural Science, Ehime University, 3-5-7, Tarumi, Matsuyama, Ehime 790-8566, Japan
| | - Keisuke Kimoto
- Fisheries Research Division, Oita Prefectural Agriculture, Forestry and Fisheries Research Center, Oita 879-2602, Japan
| | - Kumiko Tsuru
- Fisheries Research Division, Oita Prefectural Agriculture, Forestry and Fisheries Research Center, Oita 879-2602, Japan
| | - Yoshikazu Kiyabu
- Fisheries Research Division, Oita Prefectural Agriculture, Forestry and Fisheries Research Center, Oita 879-2602, Japan
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Manríquez RA, Sandoval M, Loncoman C, Tafalla C, Avendaño-Herrera R, Cárcamo JG. Epigenetic reprogramming around IFN1 and IFNy2 promoters in rainbow trout cells inoculated with infectious pancreatic necrosis virus (IPNV). FISH & SHELLFISH IMMUNOLOGY 2023; 140:108947. [PMID: 37454879 DOI: 10.1016/j.fsi.2023.108947] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/20/2022] [Revised: 07/12/2023] [Accepted: 07/13/2023] [Indexed: 07/18/2023]
Abstract
Infectious pancreatic necrosis virus (IPNV) has proven to effectively evade the host antiviral responses. This study clarifies whether the modulation of the antiviral immune response exerted by IPNV involves epigenetic mechanisms. An in-silico characterization of the rainbow trout IFN1 and IFNγ2 promoters was performed, identifying the islands or sequences rich in CpG dinucleotides and the putative transcription factor binding sites (TBS) for both gene promoters. RTS11 cells (rainbow trout monocyte/macrophage) were infected with IPNV, and the course of viral infection was followed up to 48 h post infection (hpi). Infected cells showed increased IFN1 and IFNγ2 transcriptional expression at 6 and 24 hpi, respectively. IPNV infection caused increases and decreases in global IFNγ2 promoter methylation at 6 and 24 hpi, respectively. The CpG dinucleotides at positions -392 and + 38 of this promoter were the most sensitive to methylation changes. The IFN1 promoter remained fully unmethylated during the course of the infection, similar to the control. The changes in the methylation pattern observed for the IFNγ2 promoter were coincident with the changes in DNA methyltransferase (DNMT) expression levels, increasing at 6 hpi and decreasing below basal level at 24 hpi. Similarly, the H4 histones associated with the IFN1 and IFNγ2 promoters were hyperacetylated at 6 hpi, subsequently decreasing their acetylation below basal levels at 24 hpi, in both promoters. Coincidentally with the above, overexpression of histone acetyltransferase (HAT) was observed at 6 hpi and of histone deacetylase (HDAC) at 24 hpi, with return to baseline of HAT. These results suggest that IPNV would epigenetically modulate the expression of IFN1 by changing acetylation levels of the histones H4 associated with its promoter. Also, the modulation of the expression of IFNy2 would be by switching methylation/demethylation levels of its promoter, in addition to changes in acetylation levels of histones H4 associated with this promoter. This study is the first to demonstrate the effect of epigenetic reprogramming after IPNV infection in salmonid cells, demonstrating that promoter methylation/demethylation level and changes in the histone code associated with promoters may play a role in the modulation of the immune response induced by the virus.
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Affiliation(s)
- René A Manríquez
- Instituto de Bioquímica y Microbiología, Facultad de Ciencias, Universidad Austral de Chile, Valdivia, Chile; Interdisciplinary Center for Aquaculture Research (INCAR), Valdivia, Chile
| | - Moisés Sandoval
- Instituto de Bioquímica y Microbiología, Facultad de Ciencias, Universidad Austral de Chile, Valdivia, Chile; Interdisciplinary Center for Aquaculture Research (INCAR), Valdivia, Chile
| | - Carlos Loncoman
- Instituto de Bioquímica y Microbiología, Facultad de Ciencias, Universidad Austral de Chile, Valdivia, Chile
| | - Carolina Tafalla
- Animal Health Research Center (CISA), INIA-CSIC, Valdeolmos-Alalpardo, 28130, Madrid, Spain
| | - R Avendaño-Herrera
- Interdisciplinary Center for Aquaculture Research (INCAR), Valdivia, Chile; Laboratorio de Patología de Organismos Acuáticos y Biotecnología Acuícola, Universidad Andrés Bello, Viña del Mar, Chile; Centro de Investigación Marina Quintay (CIMARQ), Universidad Andrés Bello, Quintay, Chile
| | - Juan G Cárcamo
- Instituto de Bioquímica y Microbiología, Facultad de Ciencias, Universidad Austral de Chile, Valdivia, Chile; Interdisciplinary Center for Aquaculture Research (INCAR), Valdivia, Chile.
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Gao H, Li K, Ai K, Geng M, Cao Y, Wang D, Yang J, Wei X. Interleukin-12 induces IFN-γ secretion and STAT signaling implying its potential regulation of Th1 cell response in Nile tilapia. FISH & SHELLFISH IMMUNOLOGY 2023; 140:108974. [PMID: 37482205 DOI: 10.1016/j.fsi.2023.108974] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/19/2023] [Revised: 07/18/2023] [Accepted: 07/20/2023] [Indexed: 07/25/2023]
Abstract
As a pleiotropic cytokine consisting of IL-12p35 and IL-12p40, Interleukin-12 (IL-12) features in inflammation regulation and anti-bacterial immunity. While IL-12 homologs have been identified in non-mammalian species, the precise mechanisms by which IL-12 contributes to early adaptive immune responses in vertebrates remain incompletely understood. Herein, an evolutionary conserved Oreochromis niloticus IL-12 (defined as OnIL-12) was identified by synteny characterization, structural comparisons and phylogenetic pattern of IL-12p35b and IL-12p40a. IL-12p35b and IL-12p40a exhibited widespread expression in lymphoid-related tissues of tilapia, while their mRNA expression in head-kidney demonstrated a significant increase after Edwardsiella piscicida infection. Compared with other lymphocytes, recombinant OnIL-12 (rOnIL-12) displayed stronger affinity binding to T cells. Although stimulation of lymphocytes with the p35b or p40a subunit resulted in a significant induction of IFN-γ expression, rOnIL-12 showed stronger potential to promote IFN-γ expression than these subunits. rOnIL-12 not only elevated the mRNA expression level Th1 cell-associated transcription factor T-bet in lymphocytes, but also increased the proportion of CD4-1+IFN-γ+ lymphocytes. Moreover, the mRNA and phosphorylation levels of STAT1, STAT3, STAT4 and STAT5 were enhanced by rOnIL-12. These findings will offer previous evidence for further exploration into the regulatory mechanisms of Th1 cellular immunity in early vertebrates.
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Affiliation(s)
- Haiyou Gao
- State Key Laboratory of Estuarine and Coastal Research, School of Life Sciences, East China Normal University, Shanghai, 200241, China
| | - Kang Li
- State Key Laboratory of Estuarine and Coastal Research, School of Life Sciences, East China Normal University, Shanghai, 200241, China.
| | - Kete Ai
- State Key Laboratory of Estuarine and Coastal Research, School of Life Sciences, East China Normal University, Shanghai, 200241, China
| | - Ming Geng
- State Key Laboratory of Estuarine and Coastal Research, School of Life Sciences, East China Normal University, Shanghai, 200241, China
| | - Yi Cao
- State Key Laboratory of Estuarine and Coastal Research, School of Life Sciences, East China Normal University, Shanghai, 200241, China
| | - Ding Wang
- State Key Laboratory of Estuarine and Coastal Research, School of Life Sciences, East China Normal University, Shanghai, 200241, China
| | - Jialong Yang
- State Key Laboratory of Estuarine and Coastal Research, School of Life Sciences, East China Normal University, Shanghai, 200241, China; Laboratory for Marine Biology and Biotechnology, Qingdao National Laboratory for Marine Science and Technology, Qingdao, 266237, China
| | - Xiumei Wei
- State Key Laboratory of Estuarine and Coastal Research, School of Life Sciences, East China Normal University, Shanghai, 200241, China.
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Choudhury C, Giri S, Mazumder R, Das R, Barhoi D, Sengupta M. Heavy metal bioaccumulation triggers oxystress, genotoxicity and immunomodulation in head kidney macrophages of Channa punctatus Bloch. ECOTOXICOLOGY (LONDON, ENGLAND) 2023:10.1007/s10646-023-02659-2. [PMID: 37173532 DOI: 10.1007/s10646-023-02659-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 04/20/2023] [Indexed: 05/15/2023]
Abstract
Studies on heavy metal induced toxicity have been conducted in many water bodies across the globe and such effects have been evaluated in various fish species. The present study was designed to determine the load of some heavy metals in select sites in Southern Assam, India, along with estimating their concentration in tissues of Channa punctatus Bloch. inhabiting those niches. The effect of heavy metals in oxystress generation, genotoxicity and subsequent immune response in fish was also evaluated. In all of these sites, the concentration of Hg, Cd, Pb and Cr were above the permissible ranges while their concentrations were several folds higher in the piscine tissues due to bioaccumulation and possible biomagnification. Kidney showed the highest metal pollution index followed by liver and gills. Generation of ROS was significantly elevated and that in turn triggered oxystress, as is evident from enhanced lipid peroxidation, protein carbonylation and respiratory burst activity. These were in association with the compromised antioxidant enzyme levels with concomitant damage to DNA as evident from Comet parameters. The innate immune potential was significantly impaired as evident from the compromised cell adhesion, phagocytosis, intracellular killing activity in head kidney macrophages (HKM) along with decreased release of nitric oxide (NO) and myeloperoxidase (MPO). Immunosuppression was further validated at protein levels where compromised release of cytokines viz. TNF-α, IL-1β, IL-6, IL-10 and IL-12 and cell signaling molecules iNOS and NF-κβ were noted. Thus the present study indicates genotoxicity along with a compromise in immune status of Channa punctatus Bloch. living in a habitat laden with heavy metals.
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Affiliation(s)
- Chohelee Choudhury
- Immunobiology and Nanobiotechnology Laboratory, Department of Biotechnology, Assam University, Silchar, Assam, 788011, India
| | - Sarbani Giri
- Laboratory of Molecular and Cell Biology, Department of Life Science and Bioinformatics, Assam University, Silchar, 788011, India
| | - Ritwik Mazumder
- Department of Economics, Assam University, Silchar, Assam, 788011, India
| | - Rajkamal Das
- Immunobiology and Nanobiotechnology Laboratory, Department of Biotechnology, Assam University, Silchar, Assam, 788011, India
| | - Dharmeswar Barhoi
- Laboratory of Molecular and Cell Biology, Department of Life Science and Bioinformatics, Assam University, Silchar, 788011, India
| | - Mahuya Sengupta
- Immunobiology and Nanobiotechnology Laboratory, Department of Biotechnology, Assam University, Silchar, Assam, 788011, India.
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Goldstein M, Vallejos-Vidal E, Wong-Benito V, Barraza-Rojas F, Tort L, Reyes-Lopez FE, Imarai M. Effects of artificial photoperiods on antigen-dependent immune responses in rainbow trout (Oncorhynchus mykiss). FISH & SHELLFISH IMMUNOLOGY 2023; 137:108759. [PMID: 37088347 DOI: 10.1016/j.fsi.2023.108759] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/14/2023] [Revised: 04/13/2023] [Accepted: 04/19/2023] [Indexed: 05/03/2023]
Abstract
In this study, we investigated the effects of the artificial photoperiods that mimic summer (16L:8D) and winter (8L:16D) solstices, equinoxes (12L:12D), and the artificial 24-h light regimen (24L:0D) on the leukocyte populations and the T helper and regulatory type responses on rainbow trout (Oncorhynchus mykiss). Using flow cytometry analysis, we found that photoperiod induces changes in head kidney leukocyte subsets. The lymphoid subset increased in the 16L:8D summer solstice regime. The analysis using antibodies against B and T cells showed the increase of CD4-1+ T lymphocytes and other unidentified lymphoid cells, with no changes in the B cells. To investigate the modulatory influence of the photoperiod on the fish T cell response, we quantified in the head kidney the transcript levels of genes involved in the Th1 type response (t-bet, ifn-ƴ, il-12p35, il-12p40c), Th2 type response (gata3, il-4/13a), Th17 response (ror-ƴt, il-17a/f), T regulatory response (foxp3α, il-10a, tgf-β1), and the T cell growth factor il-2. The results showed that the seasonal photoperiod alone has a limited influence on the expression of these genes, as the only difference was observed in il-14/13a and il-10a transcripts of fish kept on the 16L:8D regimen. In addition, the 24L:0D treatment used in aquaculture produces a reduction of il-14/13a and il-17a/f. We also evaluated the effect of photoperiod in the presence of an antigenic stimulus. Thus, in fish immunized with the recombinant viral protein 1 (rVP1) of infectious pancreatic necrosis virus (IPNV), the photoperiod had a striking influence on the type of adaptive immune response. Each photoperiod fosters a unique immune signature of antigenic response. A classical type 1 response is observed in fish subjected to the 16D:8L photoperiod. In contrast, fish in the 12L:12D photoperiod showed only the upregulation of il-12p40c. Furthermore, none of the cytokines were increased in fish maintained on the artificial 24L:0D regimen, and a decrease in the master transcription factors (t-bet, ror-ƴt, and foxp3α) was observed. Thus, fish on the 12L:12D and 24L:0D photoperiod appear hyporesponsive regarding the T cell response. Altogether, this study showed that photoperiods modify the magnitude and quality of the T-helper response in rainbow trout and thus impact essential mechanisms for the generation of immune memory and protection against microorganisms.
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Affiliation(s)
- Merari Goldstein
- Centro de Biotecnología Acuícola, Facultad de Química y Biología, Universidad de Santiago de Chile, Avenida Libertador Bernardo O'Higgins 3363, Edificio de Investigación Eduardo Morales, 9170002 Estación Central, Santiago, Chile.
| | - Eva Vallejos-Vidal
- Centro de Biotecnología Acuícola, Facultad de Química y Biología, Universidad de Santiago de Chile, Avenida Libertador Bernardo O'Higgins 3363, Edificio de Investigación Eduardo Morales, 9170002 Estación Central, Santiago, Chile; Núcleo de Investigación Aplicada en Ciencias Veterinarias y Agronómicas, Facultad de Medicina Veterinaria y Agronomía, Universidad de Las Américas, Santiago, Chile.
| | - Valentina Wong-Benito
- Centro de Biotecnología Acuícola, Facultad de Química y Biología, Universidad de Santiago de Chile, Avenida Libertador Bernardo O'Higgins 3363, Edificio de Investigación Eduardo Morales, 9170002 Estación Central, Santiago, Chile.
| | - Felipe Barraza-Rojas
- Centro de Biotecnología Acuícola, Facultad de Química y Biología, Universidad de Santiago de Chile, Avenida Libertador Bernardo O'Higgins 3363, Edificio de Investigación Eduardo Morales, 9170002 Estación Central, Santiago, Chile.
| | - Lluis Tort
- Department of Cell Biology, Physiology, and Immunology, Universitat Autònoma de Barcelona, Barcelona, Spain.
| | - Felipe E Reyes-Lopez
- Centro de Biotecnología Acuícola, Facultad de Química y Biología, Universidad de Santiago de Chile, Avenida Libertador Bernardo O'Higgins 3363, Edificio de Investigación Eduardo Morales, 9170002 Estación Central, Santiago, Chile.
| | - Mónica Imarai
- Centro de Biotecnología Acuícola, Facultad de Química y Biología, Universidad de Santiago de Chile, Avenida Libertador Bernardo O'Higgins 3363, Edificio de Investigación Eduardo Morales, 9170002 Estación Central, Santiago, Chile; Departamento de Biología, Facultad de Química y Biología, Universidad de Santiago de Chile, Santiago, Chile.
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Liu F, Dixon B, Del Mar Ortega-Villaizan M, Tafalla C, Xu H, Secombes CJ, Wang T. Novel insights into the cytokine network of rainbow trout Oncorhynchus mykiss using cell lines and primary leukocyte populations. FISH & SHELLFISH IMMUNOLOGY 2023; 137:108755. [PMID: 37084856 DOI: 10.1016/j.fsi.2023.108755] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/16/2023] [Revised: 04/17/2023] [Accepted: 04/18/2023] [Indexed: 05/03/2023]
Abstract
Cytokines are small proteins that regulate innate and adaptive immune responses and are released by both immune and non-immune cell types. In the current study, the constitutive and induced gene expression profiles of a suite of proinflammatory and regulatory cytokines was examined comparatively in eight rainbow trout (Oncorhynchus mykiss) cell lines, in order to establish the cytokine repertoires of these different cell types, especially the understudied non-immune cells. They included three epithelial cell lines (RTgut, RTgill, and RTL), one endothelial cell line (RTH), one fibroblast cell line (RTG-2), two stromal cell lines (TSS and TPS-2) and one monocyte/macrophage-like cell line (RTS-11). Three types of primary leukocytes (derived from blood, spleen and head kidney) of trout were also included in the analysis, to allow comparison to the repertoires expressed in T cells, as a major source of cytokines in immune responses. The major findings are: 1) IL-2A, IL-2B, IL-4/13B1, IL-4/13B2, IL-10b, P40B1, P28B, IL-17A/F1b, TNF-α3, TNF-α4, IFNγ1, CCL20L2b and CCL20L3a are expressed mainly in leukocytes but IL-17 N, IL-17D, IL-20 and CCL20L1b2 are not expressed in these cells. Hence future studies in these cell lines will help establish their function in fish; 2) Some of the cytokines were differentially expressed in the cell lines, revealing the potential role of these cell types in aspects of trout mucosal and inflammatory immune responses, 3) Similar cell types grouped together in the cell cluster analysis, including the leukocyte cluster, stromal cell cluster, and epithelial and endothelial cell cluster. Taken together, this investigation of these trout cell lines forms a good database for studying the function of cytokines not expressed in isolated leukocytes or that are preferentially expressed in the cell lines. Furthermore, the cytokine expression analysis undertaken confirmed the phenotypic relationship of these cell types at the molecular level.
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Affiliation(s)
- Fuguo Liu
- Scottish Fish Immunology Research Centre, School of Biological Sciences, University of Aberdeen, Aberdeen, AB24 2TZ, United Kingdom.
| | - Brian Dixon
- Department of Biology, University of Waterloo, Canada
| | | | - Carolina Tafalla
- Centro de Investigación en Sanidad Animal (CISA-INIA-CSIC), Madrid, Spain.
| | - Hongsen Xu
- Hubei Key Laboratory of Animal Nutrition and Feed Science, School of Animal Science and Nutritional Engineering, Wuhan Polytechnic University, Wuhan, 430023, China
| | - Christopher J Secombes
- Scottish Fish Immunology Research Centre, School of Biological Sciences, University of Aberdeen, Aberdeen, AB24 2TZ, United Kingdom.
| | - Tiehui Wang
- Scottish Fish Immunology Research Centre, School of Biological Sciences, University of Aberdeen, Aberdeen, AB24 2TZ, United Kingdom.
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9
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Wang X, Zhang A, Qiu X, Yang K, Zhou H. The IL-12 family cytokines in fish: Molecular structure, expression profile and function. DEVELOPMENTAL AND COMPARATIVE IMMUNOLOGY 2023; 141:104643. [PMID: 36632929 DOI: 10.1016/j.dci.2023.104643] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/31/2022] [Revised: 01/02/2023] [Accepted: 01/08/2023] [Indexed: 06/17/2023]
Abstract
Interleukin (IL)-12 family cytokines including IL-12, IL-23, IL-27, IL-35 and IL-39 are heterodimeric cytokines composed of two subunits, an α-chain (entitled p35, p19 and p28) and a β-chain (namely p40 and Epstein-Barr virus-induced gene 3, EBI3). Unlike in mammals, specific whole genome duplication events in fish may generate more paralogues of these subunits as the components of IL-12 family cytokines. Although all subunit genes of IL-12 family have been isolated and identified in various fish species, some important issues on fish IL-12 family are needed to be addressed compared to the extensive study in mammals: Whether the expansion of these subunit genes results in the generation of multiple isoforms of the family cytokines; Whether the related receptor genes have similar complex repertoire corresponding to their ligands; How about the expression kinetics of these subunit paralogues particularly under the circumstance of pathogen infection and immune stimulation; How about the functional properties of IL-12 family in fish. In the past ten years, these concerns have received increasing attentions to establish the biological significance of this family cytokines in fish immunity. In this review, we summarized the current understanding of IL-12 family with a special focus on the molecular structures, inducible expression profiles and functions of IL-12 family members in fish.
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Affiliation(s)
- Xinyan Wang
- School of Life Science and Technology, University of Electronic Science and Technology of China, Chengdu, People's Republic of China
| | - Anying Zhang
- School of Life Science and Technology, University of Electronic Science and Technology of China, Chengdu, People's Republic of China
| | - Xingyang Qiu
- School of Life Science and Technology, University of Electronic Science and Technology of China, Chengdu, People's Republic of China
| | - Kun Yang
- School of Life Science and Technology, University of Electronic Science and Technology of China, Chengdu, People's Republic of China
| | - Hong Zhou
- School of Life Science and Technology, University of Electronic Science and Technology of China, Chengdu, People's Republic of China.
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10
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Dharmaratnam A, Sudhagar A, Swaminathan TR. Evaluation of protective effects of heat-inactivated cyprinid herpesvirus-2 (CyHV-2) vaccine against herpesviral hematopoietic necrosis disease (HVHND) in goldfish (Carassius auratus). FISH & SHELLFISH IMMUNOLOGY 2023; 132:108460. [PMID: 36503057 DOI: 10.1016/j.fsi.2022.108460] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/28/2022] [Revised: 08/18/2022] [Accepted: 11/27/2022] [Indexed: 06/17/2023]
Abstract
Cyprinid herpesvirus-2 (CyHV-2) is an important virus that causes herpesviral hematopoietic necrosis disease (HVHND) leading to huge economic losses in goldfish (Carassius auratus). However, until now no proper prophylactic measure or treatment is available for CyHV-2 infection in goldfish. Hence, in this experiment, we developed a heat-inactivated CyHV-2 vaccine and evaluated its performance in goldfish. Initially, CyHV-2 was propagated in the fantail goldfish fin (FtGF) cell line and the titer of the viral inoculum was 107.8 TCID50/ml. Subsequently, various temperatures (40 °C, 50 °C, 60 °C, 70 °C, and 80 °C) were evaluated to achieve the complete inactivation of CyHV-2. Only the viral inoculum inactivated at 80 °C for 1 h did not show any cytopathic effect in the FtGF cell line after five blind passages. Hence the heat-inactivated CyHV-2 vaccine developed at 80 °C was further used for immunization trials in goldfish. The experimental goldfish were intraperitoneally immunized with 300 μL of the heat-inactivated CyHV-2 vaccine. Subsequently, the kidney and spleen tissues were sampled at various time points post-vaccination (6th hr, 2nd day, 4th day, 6th day, 10th day, 16th day, and 30th day) to evaluate the expression of immune genes (IL-12, IL-10, IFN-γ, CD8, and CD4). A significant upregulation of immune genes was observed at various time points in the kidney and spleen tissue of the vaccinated goldfish. Furthermore, in order to study the efficacy of the vaccine, the experimental fish were challenged with CyHV-2 (107.8 TCID50/ml) after the 30th day post-vaccination. The survival of the fish in the vaccine group (86.7%) was significantly higher compared to the non-vaccinated group (20%). Moreover, the relative percentage survival of the vaccinated group was 83.34%. In spite of the single dose, the heat-killed vaccine developed in the present study elicited the immune response and offered better protection in goldfish against CyHV-2. However, further large-scale field performance evaluation studies are necessary to develop this vaccine on a commercial scale.
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Affiliation(s)
- Arathi Dharmaratnam
- Peninsular and Marine Fish Genetic Resources Centre, ICAR National Bureau of Fish Genetic Resources, CMFRI Campus, Kochi, Kerala, 682 018, India
| | - Arun Sudhagar
- Peninsular and Marine Fish Genetic Resources Centre, ICAR National Bureau of Fish Genetic Resources, CMFRI Campus, Kochi, Kerala, 682 018, India
| | - Thangaraj Raja Swaminathan
- Peninsular and Marine Fish Genetic Resources Centre, ICAR National Bureau of Fish Genetic Resources, CMFRI Campus, Kochi, Kerala, 682 018, India.
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11
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Wong-Benito V, Barraza F, Trujillo-Imarai A, Ruiz-Higgs D, Montero R, Sandino AM, Wang T, Maisey K, Secombes CJ, Imarai M. Infectious pancreatic necrosis virus (IPNV) recombinant viral protein 1 (VP1) and VP2-Flagellin fusion protein elicit distinct expression profiles of cytokines involved in type 1, type 2, and regulatory T cell response in rainbow trout (Oncorhynchus mykiss). FISH & SHELLFISH IMMUNOLOGY 2022; 131:785-795. [PMID: 36323384 DOI: 10.1016/j.fsi.2022.10.060] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/27/2022] [Revised: 10/25/2022] [Accepted: 10/26/2022] [Indexed: 06/16/2023]
Abstract
In this study, we examined the cytokine immune response against two proteins of infectious pancreatic necrosis virus (IPNV) in rainbow trout (Oncorhynchus mykiss), the virion-associated RNA polymerase VP1 and VP2-Flagellin (VP2-Flg) fusion protein. Since VP1 is not a structural protein, we hypothesize it can induce cellular immunity, an essential mechanism of the antiviral response. At the same time, the fusion construction VP2-Flg could be highly immunogenic due to the presence of the flagellin used as an adjuvant. Fish were immunized with the corresponding antigen in Montanide™, and the gene expression of a set of marker genes of Th1, Th2, and the immune regulatory response was quantified in the head kidney of immunized and control fish. Results indicate that VP1 induced upregulation of ifn-γ, il-12p40c, il-4/13a, il-4/13b2, il-10a, and tgf-β1 in immunized fish. Expression of il-2a did not change in treated fish at the times tested. The antigen-dependent response was analysed by in vitro restimulation of head kidney leukocytes. In this assay, the group of cytokines upregulated after VP1-restimulation was consistent with those upregulated in the head kidney in vivo. Interestingly, VP1 induced il-2a expression after in vitro restimulation. The analysis of sorted lymphocytes showed that the increase of cytokines occurred in CD4-1+ T cells suggesting that Th differentiation happens in response to VP1. This is also consistent with the expression of t-bet and gata3, the master regulators for Th1/Th2 differentiation in the kidneys of immunized animals. A different cytokine expression profile was found after VP2-Flg administration, i.e., upregulation occurs for ifn-γ, il-4/13a, il-10a, and tgf-β1, while down-regulation was observed in il-4/13b2 and il-2a. The cytokine response was due to flagellin; only the il-2a effect was dependent upon VP2 in the fusion protein. To the best of our knowledge this study reports for the first-time characteristics of the adaptive immune response induced in response to IPNV VP1 and the fusion protein VP2-Flg in fish. VP1 induces cytokines able to trigger the humoral and cell-mediated immune response in rainbow trout. The analysis of the fish response against VP2-Flg revealed the immunogenic properties of Aeromonas salmonicida flagellin, which can be further tested for adjuvanticity. The novel immunogenic effects of VP1 in rainbow trout open new opportunities for further IPNV vaccine development using this viral protein.
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Affiliation(s)
- Valentina Wong-Benito
- Laboratorio de Inmunología. Centro de Biotecnología Acuícola, Departamento de Biología, Facultad de Química y Biología, Universidad de Santiago de Chile, Alameda, 3363, Santiago, Chile.
| | - Felipe Barraza
- Laboratorio de Inmunología. Centro de Biotecnología Acuícola, Departamento de Biología, Facultad de Química y Biología, Universidad de Santiago de Chile, Alameda, 3363, Santiago, Chile.
| | - Agustín Trujillo-Imarai
- Laboratorio de Inmunología. Centro de Biotecnología Acuícola, Departamento de Biología, Facultad de Química y Biología, Universidad de Santiago de Chile, Alameda, 3363, Santiago, Chile.
| | - Daniela Ruiz-Higgs
- Laboratorio de Inmunología. Centro de Biotecnología Acuícola, Departamento de Biología, Facultad de Química y Biología, Universidad de Santiago de Chile, Alameda, 3363, Santiago, Chile.
| | - Ruth Montero
- Laboratorio de Inmunología Comparativa. Centro de Biotecnología Acuícola, Departamento de Biología, Facultad de Química y Biología, Universidad de Santiago de Chile, Alameda, 3363, Santiago, Chile.
| | - Ana María Sandino
- Laboratorio de Virología. Centro de Biotecnología Acuícola, Departamento de Biología, Facultad de Química y Biología, Universidad de Santiago de Chile, Alameda, 3363, Santiago, Chile.
| | - Tiehui Wang
- Scottish Fish Immunology Research Centre, School of Biological Sciences, University of Aberdeen, Aberdeen AB24 2TZ, United Kingdom.
| | - Kevin Maisey
- Laboratorio de Inmunología Comparativa. Centro de Biotecnología Acuícola, Departamento de Biología, Facultad de Química y Biología, Universidad de Santiago de Chile, Alameda, 3363, Santiago, Chile.
| | - Christopher J Secombes
- Scottish Fish Immunology Research Centre, School of Biological Sciences, University of Aberdeen, Aberdeen AB24 2TZ, United Kingdom.
| | - Mónica Imarai
- Laboratorio de Inmunología. Centro de Biotecnología Acuícola, Departamento de Biología, Facultad de Química y Biología, Universidad de Santiago de Chile, Alameda, 3363, Santiago, Chile.
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12
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Mu P, Huo J, Li X, Li W, Li X, Ao J, Chen X. IL-2 Signaling Couples the MAPK and mTORC1 Axes to Promote T Cell Proliferation and Differentiation in Teleosts. JOURNAL OF IMMUNOLOGY (BALTIMORE, MD. : 1950) 2022; 208:1616-1631. [PMID: 35321881 DOI: 10.4049/jimmunol.2100764] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/04/2021] [Accepted: 01/27/2022] [Indexed: 06/14/2023]
Abstract
IL-2 is a pleiotropic cytokine that is critical for T cell immunity. Although the IL-2-mediated regulation of T cell immunity in mammals is relatively well understood, it remains largely unknown whether and how IL-2 regulates T cell immunity in lower vertebrates. To address this knowledge gap, we investigated the role played by IL-2 in the regulation of T cell response, as well as the associated underlying mechanisms in a teleost fish, large yellow croaker (Larimichthys crocea). We found that large yellow croaker (L. crocea) IL-2 (LcIL-2) significantly promoted T cell proliferation both in vivo and in vitro; significantly induced the differentiation of Th1, Th2, regulatory T, and cytotoxic T cells while inhibiting Th17 differentiation; and participated in the elimination of invading pathogenic bacteria. Mechanistically, the binding of LcIL-2 to its heterotrimer receptor complex (LcIL-15Rα/LcIL-2Rβ/Lcγc) triggered the conserved JAK-STAT5 pathway, which in turn regulated the expression of genes involved in T cell expansion, differentiation, and biological function. The MAPK and mammalian target of rapamycin complex 1 (mTORC1) axes, which are involved in TCR-mediated signaling, were also required for LcIL-2-mediated T cell response. Collectively, our results demonstrated that fish IL-2 plays a comprehensive regulatory role in T cell response and highlighted the complex and delicate network regulating T cell-driven immune response. We propose that T cell immunity is regulated by the interplay between TCR signaling and cytokine signaling, and that this basic strategy evolved before the emergence of the tetrapod lineage. Our findings provide valuable insights into the regulatory mechanisms underlying T cell response in teleosts.
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Affiliation(s)
- Pengfei Mu
- Key Laboratory of Marine Biotechnology of Fujian Province, Institute of Oceanology, Fujian Agriculture and Forestry University, Fuzhou, China
- Key Laboratory of Marine Biogenetic Resources, Third Institute of Oceanography, Ministry of Natural Resources, Xiamen, China; and
| | - Jieying Huo
- Key Laboratory of Marine Biotechnology of Fujian Province, Institute of Oceanology, Fujian Agriculture and Forestry University, Fuzhou, China
- Key Laboratory of Marine Biogenetic Resources, Third Institute of Oceanography, Ministry of Natural Resources, Xiamen, China; and
| | - Xiaofeng Li
- Key Laboratory of Marine Biotechnology of Fujian Province, Institute of Oceanology, Fujian Agriculture and Forestry University, Fuzhou, China
| | - Wanru Li
- Key Laboratory of Marine Biotechnology of Fujian Province, Institute of Oceanology, Fujian Agriculture and Forestry University, Fuzhou, China
| | - Xiaomeng Li
- Key Laboratory of Marine Biotechnology of Fujian Province, Institute of Oceanology, Fujian Agriculture and Forestry University, Fuzhou, China
| | - Jingqun Ao
- Key Laboratory of Marine Biogenetic Resources, Third Institute of Oceanography, Ministry of Natural Resources, Xiamen, China; and
| | - Xinhua Chen
- Key Laboratory of Marine Biotechnology of Fujian Province, Institute of Oceanology, Fujian Agriculture and Forestry University, Fuzhou, China;
- Key Laboratory of Marine Biogenetic Resources, Third Institute of Oceanography, Ministry of Natural Resources, Xiamen, China; and
- Laboratory for Marine Biology and Biotechnology, Qingdao National Laboratory for Marine Science and Technology, Qingdao, China
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13
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Qiu X, Wang D, Lv M, Sun H, Ren J, Wang X, Zhou H. Identification and functional characterization of interleukin-12 receptor beta 1 and 2 in grass carp (Ctenopharyngodon idella). Mol Immunol 2022; 143:58-67. [PMID: 35042118 DOI: 10.1016/j.molimm.2022.01.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2021] [Revised: 01/11/2022] [Accepted: 01/11/2022] [Indexed: 11/30/2022]
Abstract
Interleukin 12 (IL-12) binds its receptor complex of IL-12 receptor beta 1 (IL-12Rβ1) and IL-12Rβ2 to transduce cellular signaling in mammals. In teleosts, the function of Il-12 is drawing increasing attention, but molecular and functional features of Il-12 receptors remain obscure. Especially, the existence of multiple Il-12 isoforms in some fish species elicits the requirement to clarify their receptors. In this study, we isolated three cDNA sequences as Il-12 receptor candidates from grass carp, entitled as grass carp Il-12rβ1 (gcIl-12rβ1), gcIl-12rβ2a and gcIl-12rβ2b. In silico analysis showed that gcIl-12rβ1 and gcIl-12rβ2a shared the conserved gene locus and similar structure characteristics with their orthologues of zebrafish, frog, chicken, mouse and human, respectively. However, the Il-12rβ2b of grass carp and zebrafish was similar to IL-27Ra in non-fish species. Further locally installed BLAST and gene synteny analysis uncovered three gcIl-12 receptors being single copied genes. Tissue distribution assay revealed that gcil12rβ1 and gcil12rβ2a transcripts were predominantly expressed in head kidney, differing from the even distribution of gcil12rβ2b transcripts in all detected tissues. Subsequently, the binding ability and antagonistic effects of recombinant extracellular region of gcIl-12rβ1 with recombinant grass carp Il-12 (rgcIl-12) isoforms were explored, providing functional evidence of the newly cloned gcIl-12rβ1 being genuine orthologues of mammalian IL-12Rβ1. Moreover, our data showed that gcIl-12rβ1 and gcIl-12rβ2a but not gcIl-12rβ1 and gcIl-12rβ2b mediated the effects of rgcIl-12 isoforms on ifn-γ promoter activity, thereby revealing Il-12 receptor signaling in fish. These results identified grass carp Il-12 receptors, thereby advancing our understanding of Il-12 isoform signaling in fish.
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Affiliation(s)
- Xingyang Qiu
- School of Life Science and Technology, University of Electronic Science and Technology of China, Chengdu, People's Republic of China
| | - Dan Wang
- School of Life Science and Technology, University of Electronic Science and Technology of China, Chengdu, People's Republic of China
| | - Mengyuan Lv
- School of Life Science and Technology, University of Electronic Science and Technology of China, Chengdu, People's Republic of China
| | - Hao Sun
- School of Life Science and Technology, University of Electronic Science and Technology of China, Chengdu, People's Republic of China
| | - Jingqi Ren
- School of Life Science and Technology, University of Electronic Science and Technology of China, Chengdu, People's Republic of China
| | - Xinyan Wang
- School of Life Science and Technology, University of Electronic Science and Technology of China, Chengdu, People's Republic of China
| | - Hong Zhou
- School of Life Science and Technology, University of Electronic Science and Technology of China, Chengdu, People's Republic of China.
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14
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Matsumoto M, Fischer U, Sano M, Kato G. Cell-mediated immune response against mycolic acids of Mycobacteroides salmoniphilum in rainbow trout Oncorhynchus mykiss. DEVELOPMENTAL AND COMPARATIVE IMMUNOLOGY 2021; 124:104195. [PMID: 34217784 DOI: 10.1016/j.dci.2021.104195] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/19/2021] [Revised: 06/29/2021] [Accepted: 06/30/2021] [Indexed: 06/13/2023]
Abstract
Mycobacteriosis caused by Mycobacterium spp. causes economic damages to the world aquaculture industry. In mammals, mycolic acids contained in the cell wall of Mycobacterium spp. are presented by CD1b molecule as lipid antigens and induce cell-mediated immunity (CMI). Here, we investigated CMI responses against the mycolic acids of Mycobacterioides salmoniphilum in a CD1-lacking teleost fish, rainbow trout. After stimulation of trout leukocytes with mycolic acids, the number and percentage of CD8α+ T cells increased. Fish immunized with mycolic acids showed an up-regulation of IFN-γ. Further, in vitro re-stimulation of leukocytes derived from immunized fish resulted in proliferation of CD8α+ cells. These data suggest that mycolic acids are recognized as lipid antigens resulting in an activation of rainbow trout CD8α+ cells and up-regulation of the Th1 cytokine IFN-γ. The mycolic acids are promising candidates for vaccines to activate CD8α+ T cells against fish mycobacteriosis.
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Affiliation(s)
- Megumi Matsumoto
- Tokyo University of Marine Science and Technology, Department of Marine Bioscience, 4-5-7 Konan, Minato-ku, Tokyo, 108-8477, Japan
| | - Uwe Fischer
- Friedrich-Loeffler-Institut, Südufer 10, 17493, Greifswald, Germany
| | - Motohiko Sano
- Tokyo University of Marine Science and Technology, Department of Marine Bioscience, 4-5-7 Konan, Minato-ku, Tokyo, 108-8477, Japan
| | - Goshi Kato
- Tokyo University of Marine Science and Technology, Department of Marine Bioscience, 4-5-7 Konan, Minato-ku, Tokyo, 108-8477, Japan.
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15
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Qiu X, Sun H, Wang D, Ren J, Wang X, Zhang A, Yang K, Zhou H. Stimulus-Specific Expression, Selective Generation and Novel Function of Grass Carp ( Ctenopharyngodon idella) IL-12 Isoforms: New Insights Into the Heterodimeric Cytokines in Teleosts. Front Immunol 2021; 12:734535. [PMID: 34603315 PMCID: PMC8481787 DOI: 10.3389/fimmu.2021.734535] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2021] [Accepted: 09/03/2021] [Indexed: 12/25/2022] Open
Abstract
Interleukin-12 (IL-12) is a heterodimeric cytokine composed of a p35 subunit specific to IL-12 and a p40 subunit shared with IL-23. In this study, we unveiled the existence of two p35 paralogues in grass carp (named gcp35a and gcp35b). Notably, gcp35a and gcp35b displayed distinct inducible expression patterns, as poly I:C merely induced the gene expression of gcp35a but not gcp35b, while recombinant grass carp interferon-gamma (rgcIfn-γ) only enhanced the transcription of gcp35b but not gcp35a. Moreover, the signaling mechanisms responsible for the inducible expression of gcp35a and gcp35b mRNA were elucidated. Because of the existence of three grass carp p40 genes (gcp40a, gcp40b and gcp40c) and two p35 paralogues, six gcIl-12 isoforms were predicted by 3D modeling. Results showed that gcp40a and gcp40b but not gcp40c had the potential for forming heterodimers with both gcp35 paralogues via the disulfide bonds. Non-reducing electrophoresis experiments further disclosed that only gcp40b but not gcp40a or gcp40c could form heterodimers with gcp35 to produce secretory heterodimeric gcp35a/gcp40b (gcIl-12AB) and gcp35b/gcp40b (gcIl-12BB), which prompted us to prepare their recombinant proteins. These two recombinant proteins exhibited their extensive regulation on Ifn-γ production in various immune cells. Intriguingly, both gcIl-12 isoforms significantly enhanced the transcription of il-17a/f1 and il-22 in lymphocytes, and their regulation on il-17a/f1 expression was mediated by Stat3/Rorγt signaling, supporting the potential of gcIl-12 isoforms for inducing Th17-like responses. Additionally, stimulatory effects of gcIl-12 isoforms on il-17a/f1 and ifn-γ expression were attenuated by gcTgf-β1 via suppressing the activation of Stat3 signaling, implying that their signaling could be manipulated. In brief, our works provide new insights into the inducible expression pattern, heterodimeric generation and functional novelty of Il-12 isoforms in teleosts.
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Affiliation(s)
- Xingyang Qiu
- School of Life Science and Technology, University of Electronic Science and Technology of China, Chengdu, China
| | - Hao Sun
- School of Life Science and Technology, University of Electronic Science and Technology of China, Chengdu, China
| | - Dan Wang
- School of Life Science and Technology, University of Electronic Science and Technology of China, Chengdu, China
| | - Jingqi Ren
- School of Life Science and Technology, University of Electronic Science and Technology of China, Chengdu, China
| | - Xinyan Wang
- School of Life Science and Technology, University of Electronic Science and Technology of China, Chengdu, China
| | - Anying Zhang
- School of Life Science and Technology, University of Electronic Science and Technology of China, Chengdu, China
| | - Kun Yang
- School of Life Science and Technology, University of Electronic Science and Technology of China, Chengdu, China
| | - Hong Zhou
- School of Life Science and Technology, University of Electronic Science and Technology of China, Chengdu, China
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16
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Holzer AS, Piazzon MC, Barrett D, Bartholomew JL, Sitjà-Bobadilla A. To React or Not to React: The Dilemma of Fish Immune Systems Facing Myxozoan Infections. Front Immunol 2021; 12:734238. [PMID: 34603313 PMCID: PMC8481699 DOI: 10.3389/fimmu.2021.734238] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2021] [Accepted: 09/01/2021] [Indexed: 11/13/2022] Open
Abstract
Myxozoans are microscopic, metazoan, obligate parasites, belonging to the phylum Cnidaria. In contrast to the free-living lifestyle of most members of this taxon, myxozoans have complex life cycles alternating between vertebrate and invertebrate hosts. Vertebrate hosts are primarily fish, although they are also reported from amphibians, reptiles, trematodes, mollusks, birds and mammals. Invertebrate hosts include annelids and bryozoans. Most myxozoans are not overtly pathogenic to fish hosts, but some are responsible for severe economic losses in fisheries and aquaculture. In both scenarios, the interaction between the parasite and the host immune system is key to explain such different outcomes of this relationship. Innate immune responses contribute to the resistance of certain fish strains and species, and the absence or low levels of some innate and regulatory factors explain the high pathogenicity of some infections. In many cases, immune evasion explains the absence of a host response and allows the parasite to proliferate covertly during the first stages of the infection. In some infections, the lack of an appropriate regulatory response results in an excessive inflammatory response, causing immunopathological consequences that are worse than inflicted by the parasite itself. This review will update the available information about the immune responses against Myxozoa, with special focus on T and B lymphocyte and immunoglobulin responses, how these immune effectors are modulated by different biotic and abiotic factors, and on the mechanisms of immune evasion targeting specific immune effectors. The current and future design of control strategies for myxozoan diseases is based on understanding this myxozoan-fish interaction, and immune-based strategies such as improvement of innate and specific factors through diets and additives, host genetic selection, passive immunization and vaccination, are starting to be considered.
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Affiliation(s)
- Astrid S Holzer
- Institute of Parasitology, Biology Centre of the Czech Academy of Sciences, České Budějovice, Czechia
| | - M Carla Piazzon
- Fish Pathology Group, Institute of Aquaculture Torre de la Sal - Consejo Superior de Investigaciones Científicas (IATS-CSIC), Castellón, Spain
| | - Damien Barrett
- Department of Microbiology, Oregon State University, Corvallis, OR, United States
| | - Jerri L Bartholomew
- Department of Microbiology, Oregon State University, Corvallis, OR, United States
| | - Ariadna Sitjà-Bobadilla
- Fish Pathology Group, Institute of Aquaculture Torre de la Sal - Consejo Superior de Investigaciones Científicas (IATS-CSIC), Castellón, Spain
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17
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Xin L, Liu C, Zhang H, Qiu L, Wang L, Song L. The characterization of an interleukin-12 p35 homolog involved in the immune modulation of oyster Crassostrea gigas. DEVELOPMENTAL AND COMPARATIVE IMMUNOLOGY 2021; 123:104145. [PMID: 34051203 DOI: 10.1016/j.dci.2021.104145] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/21/2021] [Revised: 05/21/2021] [Accepted: 05/22/2021] [Indexed: 06/12/2023]
Abstract
Vertebrate interleukin-12 (IL-12) is a heterodimeric cytokine composing of two subunits (p35 and p40). In the present study, a p35-like subunit homolog of vertebrate IL-12 was identified from oyster Crassostrea gigas (designated as CgIL12p35L), with an open reading frame of 411 bp encoding a putative peptide of 136 amino acids. There was a long four-helix chain in CgIL12p35L, which was similar as that in vertebrate IL-12 p35. Comparative genomic analysis showed that there were conservative kinds of syntenic genes flanked CgIL12p35L. The mRNA transcripts of CgIL12p35L were constitutively expressed in various tissues and its mRNA expression level in haemocytes increased significantly after bacteria challenge. The activity of haemolymph to eliminate bacteria from the oysters treated with recombinant CgIL12p35L protein (rCgIL12p35L) in vivo increased significantly. The results collectively indicated that the homolog of vertebrate IL-12 p35 subunit existed in oysters, and it was involved in immune defense against bacteria challenge.
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Affiliation(s)
- Lusheng Xin
- Key Laboratory of Experimental Marine Biology, Institute of Oceanology, Chinese Academy of Sciences, Qingdao, 266071, China; Functional Laboratory of Marine Fisheries Science and Food Production Processes, Qingdao National Laboratory for Marine Science and Technology, Qingdao, 266235, China
| | - Chang Liu
- Liaoning Key Laboratory of Marine Animal Immunology, Dalian Ocean University, Dalian, 116023, China; Liaoning Key Laboratory of Marine Animal Immunology and Disease Control, Dalian Ocean University, Dalian, 116023, China; Dalian Key Laboratory of Aquatic Animal Disease Prevention and Control, Dalian Ocean University, Dalian, 116023, China
| | - Huan Zhang
- Key Laboratory of Experimental Marine Biology, Institute of Oceanology, Chinese Academy of Sciences, Qingdao, 266071, China
| | - Limei Qiu
- Key Laboratory of Experimental Marine Biology, Institute of Oceanology, Chinese Academy of Sciences, Qingdao, 266071, China
| | - Lingling Wang
- Functional Laboratory of Marine Fisheries Science and Food Production Processes, Qingdao National Laboratory for Marine Science and Technology, Qingdao, 266235, China; Liaoning Key Laboratory of Marine Animal Immunology, Dalian Ocean University, Dalian, 116023, China; Liaoning Key Laboratory of Marine Animal Immunology and Disease Control, Dalian Ocean University, Dalian, 116023, China; Dalian Key Laboratory of Aquatic Animal Disease Prevention and Control, Dalian Ocean University, Dalian, 116023, China
| | - Linsheng Song
- Functional Laboratory of Marine Fisheries Science and Food Production Processes, Qingdao National Laboratory for Marine Science and Technology, Qingdao, 266235, China; Liaoning Key Laboratory of Marine Animal Immunology, Dalian Ocean University, Dalian, 116023, China; Liaoning Key Laboratory of Marine Animal Immunology and Disease Control, Dalian Ocean University, Dalian, 116023, China; Dalian Key Laboratory of Aquatic Animal Disease Prevention and Control, Dalian Ocean University, Dalian, 116023, China.
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18
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Veenstra KA, Wang T, Russell KS, Tubbs L, Ben Arous J, Secombes CJ. Montanide™ ISA 763A VG and ISA 761 VG induce different immune pathway responses in rainbow trout (Oncorhynchus mykiss) when used as adjuvant for an Aeromonas salmonicida bacterin. FISH & SHELLFISH IMMUNOLOGY 2021; 114:171-183. [PMID: 33940174 DOI: 10.1016/j.fsi.2021.04.024] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/03/2021] [Revised: 04/23/2021] [Accepted: 04/25/2021] [Indexed: 06/12/2023]
Abstract
Adjuvants are the helper substances that increase vaccine efficacy by enhancing the potency and longevity of specific immune responses to antigens. Most existing fish vaccines are presented in the form of oil-based emulsions delivered by intraperitoneal injection. The characterization of their mode of action is a valuable aid to future vaccine development, particularly for the potential identification and stimulation of specific immunological pathways related to the desired protective response. This study characterized the expression of selected immune-related genes in the peritoneal cavity, head kidney and spleen following the administration of two adjuvanted-bacterial vaccines thought to induce humoral (Montanide™ ISA 763A VG) or humoral and cell mediated (Montanide™ ISA 761 VG) immune responses, to determine if differences in responsiveness are readily apparent. The most informative site was the spleen, where Montanide™ ISA 763A VG + bacterin gave rise to upregulation of genes driving T-cell/lymphoid responses, namely IL-2, IL-15 and IL-21. This combined with upregulation of IFNγ1 and IFNγ2, IL-4/13B2, p35A1 and p40 (B1 and C) indicated that the induction of Th1 and possibly Th2 immunity was occurring in fish vaccinated with this adjuvant. Perhaps the most intriguing finding was the lack of a detectable Th1 response in fish given Montanide™ ISA 761 VG + bacterin, suggesting some other arm of the immune system is activated to give protection. Whatever the reason for the different responses detected, it is clear from the present study that the adjuvant used has a major impact on the responses elicited. Since these differences are readily detectable it allows, in principle, their use to help select the most appropriate adjuvants for inclusion into fish vaccines, where the type of response elicited may need to be tailored to a particular pathogen to confer protection.
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Affiliation(s)
- Kimberly A Veenstra
- Scottish Fish Immunology Research Centre, School of Biological Sciences, University of Aberdeen, Tillydrone Avenue, Aberdeen, AB24 2TZ, UK.
| | - Tiehui Wang
- Scottish Fish Immunology Research Centre, School of Biological Sciences, University of Aberdeen, Tillydrone Avenue, Aberdeen, AB24 2TZ, UK.
| | - K Spencer Russell
- Elanco Canada Ltd, Aquaculture Research and Development, P.O. Box 17, Victoria PE, C0A 2G0, Canada.
| | - Lincoln Tubbs
- Elanco Canada Ltd, Aquaculture Research and Development, P.O. Box 17, Victoria PE, C0A 2G0, Canada.
| | - Juliette Ben Arous
- Seppic, Paris La Défense, 50 Boulevard National, 92257, La Garenne Colombes, France.
| | - Christopher J Secombes
- Scottish Fish Immunology Research Centre, School of Biological Sciences, University of Aberdeen, Tillydrone Avenue, Aberdeen, AB24 2TZ, UK.
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19
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Attaya A, Veenstra K, Welsh MD, Ahmed M, Torabi-Pour N, Saffie-Siebert S, Yoon S, Secombes CJ. In vitro evaluation of novel (nanoparticle) oral delivery systems allow selection of gut immunomodulatory formulations. FISH & SHELLFISH IMMUNOLOGY 2021; 113:125-138. [PMID: 33746060 DOI: 10.1016/j.fsi.2021.03.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/19/2020] [Revised: 03/10/2021] [Accepted: 03/12/2021] [Indexed: 06/12/2023]
Abstract
Oral delivery is the most convenient way to vaccinate cultured fish, however it is still problematic, primarily due to a lack of a commercially valid vaccine vehicle to protect the antigen against gastric degradation and ensure its uptake from the intestine. With the goal of advancing the potential to vaccinate orally, this study evaluates a novel silicon nanoparticle-based vehicle (VacSaf carrier). Aeromonas salmonicida antigens were formulated with the VacSaf carrier using different preparation methods to generate dry powder and liquid formulations. Twelve formulations were first subjected to an in vitro evaluation where the A. salmonicida bacterin conjugated to VacSaf carriers were found superior at inducing pro-inflammatory cytokine expression in primary leucocyte cultures and the macrophage/monocyte cell line RTS-11 compared with A. salmonicida bacterin alone. This was especially apparent after exposure to acid conditions to mimic stomach processing. One formulation (FD1) was taken forward to oral delivery using two doses and two administration schedules (5 days vs 10 days, the latter 5 days on, 5 days off, 5 days on), and the transcript changes of immune genes in the intestine (pyloric caeca, midgut and hindgut) and spleen were evaluated by qPCR and serum IgM was measured by ELISA. The VacSaf carrier alone was shown to be safe for use in vivo, in that no side-effects were seen, but it did induce expression of some cytokines, and may have value as an oral adjuvant candidate. The FD1 bacterin formulation was effective at inducing a range of cytokines associated with innate and adaptive immunity, mainly in the pyloric caeca, compared to A. salmonicida bacterin alone (which had almost no effect), and confirms the immune competence of this gut region following appropriate oral vaccination. These results reveal that in vitro screening of formulations for oral delivery has value and can be used to assess the most promising formulations to test further.
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Affiliation(s)
- Ahmed Attaya
- Scottish Fish Immunology Research Centre, School of Biological Sciences, University of Aberdeen, Aberdeen AB24 2TZ, Scotland, UK.
| | - Kimberly Veenstra
- Scottish Fish Immunology Research Centre, School of Biological Sciences, University of Aberdeen, Aberdeen AB24 2TZ, Scotland, UK
| | - Michael D Welsh
- Sisaf Ltd, Unit 15A the Innovation Centre, Catalyst Inc., Queen's Island, Belfast BT3 9DT, Northern Ireland, UK
| | - Mukhtar Ahmed
- Sisaf Ltd, Unit 15A the Innovation Centre, Catalyst Inc., Queen's Island, Belfast BT3 9DT, Northern Ireland, UK
| | - Nessim Torabi-Pour
- Sisaf Ltd, Unit 15A the Innovation Centre, Catalyst Inc., Queen's Island, Belfast BT3 9DT, Northern Ireland, UK
| | - Suzanne Saffie-Siebert
- Sisaf Ltd, Unit 15A the Innovation Centre, Catalyst Inc., Queen's Island, Belfast BT3 9DT, Northern Ireland, UK
| | - Sohye Yoon
- Scottish Fish Immunology Research Centre, School of Biological Sciences, University of Aberdeen, Aberdeen AB24 2TZ, Scotland, UK.
| | - Christopher J Secombes
- Scottish Fish Immunology Research Centre, School of Biological Sciences, University of Aberdeen, Aberdeen AB24 2TZ, Scotland, UK.
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20
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Attaya A, Secombes CJ, Wang T. Effective isolation of GALT cells: Insights into the intestine immune response of rainbow trout (Oncorhynchus mykiss) to different bacterin vaccine preparations. FISH & SHELLFISH IMMUNOLOGY 2020; 105:378-392. [PMID: 32615166 DOI: 10.1016/j.fsi.2020.06.051] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/07/2020] [Revised: 06/24/2020] [Accepted: 06/25/2020] [Indexed: 06/11/2023]
Abstract
The teleost gut is a multifunction complex structure that plays a pivotal immunological role in homeostasis and the maintenance of health, in addition to digestion of food and/or nutrient absorption. In vitro examination of the intestine leucocyte repertoire has the potential to aid our understanding of gut immune competence and allows a rapid screen of host-microorganism interactions in different immunological contexts. To explore this possibility, in the present study we investigated the response of isolated gut leucocytes to 4 bacterins of Aeromonas salmonicida, prepared from different strains, combinations and strains grown in different environments, in comparison to a Yersinia ruckeri bacterin for which a commercial/effective oral booster vaccine has been developed. To aid this study we also optimized further our method of GALT cell isolation from rainbow trout, so as to avoid mechanical clearance of the intestine contents. This drastically increased the cell yield from ~12 × 106 to ~210 × 106/fish with no change in the percent cell viability over time or presence of transcripts typical of the key leucocyte types needed for the study of immune modulation (i.e. T- and B-cells, dendritic cells and macrophages). A wide array of immune transcripts were modulated by the bacterins, demonstrating the diversity of GALT cell responses to bacterial stimulation. Indeed, the GALT leucocyte responses were sensitive enough to distinguish the different bacterial species, strains and membrane proteins, as seen by distinct kinetics of immune gene expression. However, the response of the GALT cells was often relatively slow and of a low magnitude compared to those of PBL. These results enhance our knowledge of the gut biocapacity and help validate the use of this model for screening of oral vaccine candidates.
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Affiliation(s)
- Ahmed Attaya
- Scottish Fish Immunology Research Centre, School of Biological Sciences, University of Aberdeen, AB24 2TZ, UK.
| | - Christopher J Secombes
- Scottish Fish Immunology Research Centre, School of Biological Sciences, University of Aberdeen, AB24 2TZ, UK.
| | - Tiehui Wang
- Scottish Fish Immunology Research Centre, School of Biological Sciences, University of Aberdeen, AB24 2TZ, UK.
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21
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Kutyrev IA, Goreva OB, Mazur OE, Mordvinov VA. A Study of Protein Fractional Composition during Incubation of Diphyllobothrium dendriticum (Cestoda) Plerocercoids in a Medium Containing Blood Serum of the Host, the Baikal Omul Coregonus migratorius (Coregonidae). BIOL BULL+ 2020. [DOI: 10.1134/s1062359020040081] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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22
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Bailey C, Holland JW, Secombes CJ, Tafalla C. A portrait of the immune response to proliferative kidney disease (PKD) in rainbow trout. Parasite Immunol 2020; 42:e12730. [PMID: 32403171 PMCID: PMC7507176 DOI: 10.1111/pim.12730] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2019] [Revised: 01/31/2020] [Accepted: 05/06/2020] [Indexed: 12/17/2022]
Abstract
Proliferative kidney disease (PKD), caused by the myxozoan Tetracapsuloides bryosalmonae, is one of the most serious parasitic diseases of salmonids in which outbreaks cause severe economic constraints for the aquaculture industry and declines of wild species throughout Europe and North America. Given that rainbow trout (Oncorhynchus mykiss) is one of the most widely farmed freshwater fish and an important model species for fish immunology, most of the knowledge on how the fish immune response is affected during PKD is from this organism. Once rainbow trout are infected, PKD pathogenesis results in a chronic kidney immunopathology mediated by decreasing myeloid cells and increasing lymphocytes. Transcriptional studies have revealed the regulation of essential genes related to T-helper (Th)-like functions and a dysregulated B-cell antibody type response. Recent reports have discovered unique details of teleost B-cell differentiation and functionality and characterized the differential immunoglobulin (Ig)-mediated response. These studies have solidified the rainbow trout T. bryosalmonae system as a sophisticated disease model capable of feeding key advances into mainstream immunology and have contributed essential information to design novel parasite disease prevention strategies. In our following perspective, we summarize these efforts to evaluate the immune mechanisms of rainbow trout during PKD pathogenesis.
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Affiliation(s)
- Christyn Bailey
- Centro de Investigación en Sanidad Animal (CISA‐INIA)MadridSpain
| | - Jason W. Holland
- Aberdeen Oomycete LaboratoryInstitute of Medical SciencesUniversity of AberdeenAberdeenUK
| | - Christopher J. Secombes
- Scottish Fish Immunology Research CentreInstitute of Biological and Environmental SciencesUniversity of AberdeenAberdeenUK
| | - Carolina Tafalla
- Centro de Investigación en Sanidad Animal (CISA‐INIA)MadridSpain
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23
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Yamaguchi T, Takizawa F, Furihata M, Soto-Lampe V, Dijkstra JM, Fischer U. Teleost cytotoxic T cells. FISH & SHELLFISH IMMUNOLOGY 2019; 95:422-439. [PMID: 31669897 DOI: 10.1016/j.fsi.2019.10.041] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/19/2019] [Revised: 10/21/2019] [Accepted: 10/22/2019] [Indexed: 06/10/2023]
Abstract
Cell-mediated cytotoxicity is one of the major mechanisms by which vertebrates control intracellular pathogens. Two cell types are the main players in this immune response, natural killer (NK) cells and cytotoxic T lymphocytes (CTL). While NK cells recognize altered target cells in a relatively unspecific manner CTLs use their T cell receptor to identify pathogen-specific peptides that are presented by major histocompatibility (MHC) class I molecules on the surface of infected cells. However, several other signals are needed to regulate cell-mediated cytotoxicity involving a complex network of cytokine- and ligand-receptor interactions. Since the first description of MHC class I molecules in teleosts during the early 90s of the last century a remarkable amount of information on teleost immune responses has been published. The corresponding studies describe teleost cells and molecules that are involved in CTL responses of higher vertebrates. These studies are backed by functional investigations on the killing activity of CTLs in a few teleost species. The present knowledge on teleost CTLs still leaves considerable room for further investigations on the mechanisms by which CTLs act. Nevertheless the information on teleost CTLs and their regulation might already be useful for the control of fish diseases by designing efficient vaccines against such diseases where CTL responses are known to be decisive for the elimination of the corresponding pathogen. This review summarizes the present knowledge on CTL regulation and functions in teleosts. In a special chapter, the role of CTLs in vaccination is discussed.
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Affiliation(s)
- Takuya Yamaguchi
- Federal Research Institute for Animal Health, Friedrich-Loeffler-Institut, 17493, Greifswald-Insel Riems, Germany
| | - Fumio Takizawa
- Laboratory of Marine Biotechnology, Faculty of Marine Science and Technology, Fukui Prefectural University, Obama, Fukui, 917-0003, Japan
| | - Mitsuru Furihata
- Nagano Prefectural Fisheries Experimental Station, 2871 Akashina-nakagawate, Azumino-shi, Nagano-ken, 399-7102, Japan
| | - Veronica Soto-Lampe
- Federal Research Institute for Animal Health, Friedrich-Loeffler-Institut, 17493, Greifswald-Insel Riems, Germany
| | - Johannes M Dijkstra
- Institute for Comprehensive Medical Science, Fujita Health University, Toyoake, Aichi, 470-1192, Japan
| | - Uwe Fischer
- Federal Research Institute for Animal Health, Friedrich-Loeffler-Institut, 17493, Greifswald-Insel Riems, Germany.
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24
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Attaya A, Jiang Y, Secombes CJ, Wang T. Distinct response of immune gene expression in peripheral blood leucocytes modulated by bacterin vaccine candidates in rainbow trout Oncorhynchus mykiss: A potential in vitro screening and batch testing system for vaccine development in aquaculture. FISH & SHELLFISH IMMUNOLOGY 2019; 93:631-640. [PMID: 31377431 DOI: 10.1016/j.fsi.2019.08.002] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/04/2019] [Revised: 07/02/2019] [Accepted: 08/01/2019] [Indexed: 06/10/2023]
Abstract
Fish aquaculture is the world's fastest growing food production industry and infectious diseases are a major limiting factor. Vaccination is the most appropriate method for controlling infectious diseases and a key reason for the success of salmonid cultivation and has reduced the use of antibiotics. The development of fish vaccines requires the use of a great number of experimental animals that are challenged with virulent pathogens. In vitro cell culture systems have the potential to replace in vivo pathogen exposure for initial screening and testing of novel vaccine candidates/preparations, and for batch potency and safety tests. PBL contain major immune cells that enable the detection of both innate and adaptive immune responses in vitro. Fish PBL can be easily prepared using a hypotonic method and is the only way to obtain large numbers of immune cells non-lethally. Distinct gene expression profiles of innate and adaptive immunity have been observed between bacterins prepared from different bacterial species, as well as from different strains or culturing conditions of the same bacterial species. Distinct immune pathways are activated by pathogens or vaccines in vivo that can be detected in PBL in vitro. Immune gene expression in PBL after stimulation with vaccine candidates may shed light on the immune pathways involved that lead to vaccine-mediated protection. This study suggests that PBL are a suitable platform for initial screening of vaccine candidates, for evaluation of vaccine-induced immune responses, and a cheap alternative for potency testing to reduce animal use in aquaculture vaccine development.
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Affiliation(s)
- Ahmed Attaya
- Scottish Fish Immunology Research Centre, Institute of Biological and Environmental Sciences, School of Biological Sciences, University of Aberdeen, Aberdeen, AB24 2TZ, UK
| | - Yousheng Jiang
- Scottish Fish Immunology Research Centre, Institute of Biological and Environmental Sciences, School of Biological Sciences, University of Aberdeen, Aberdeen, AB24 2TZ, UK; College of Fishery and Life Science, Shanghai Ocean University, Shanghai, 201306, China
| | - Christopher J Secombes
- Scottish Fish Immunology Research Centre, Institute of Biological and Environmental Sciences, School of Biological Sciences, University of Aberdeen, Aberdeen, AB24 2TZ, UK
| | - Tiehui Wang
- Scottish Fish Immunology Research Centre, Institute of Biological and Environmental Sciences, School of Biological Sciences, University of Aberdeen, Aberdeen, AB24 2TZ, UK.
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25
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Kim D, Lee SH, Lee H, Kim SJ, Lee KH, Song SK. Analyses of the gene structure and function of olive flounder (Paralichthys olivaceus) interleukin 12 (IL-12). FISH & SHELLFISH IMMUNOLOGY 2019; 92:151-164. [PMID: 31108176 DOI: 10.1016/j.fsi.2019.05.033] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/15/2019] [Revised: 05/13/2019] [Accepted: 05/17/2019] [Indexed: 06/09/2023]
Abstract
IL-12 is an important cytokine that connects the innate and adaptive immune systems. The complete gene structure of olive flounder IL-12 and its characteristics have not yet been formally reported. Here, we report the complete sequences of both subunits of olive flounder IL-12 (IL-12p35 and IL-12p40). In addition, its function was analyzed by generating the single-chain rIL-12 of which subunits were fused by a GS linker and the rIL-12-specific mouse antibody. The cDNA sequences of IL-12p35 and IL-12p40 were 1059 nucleotides and 1319 nucleotides, respectively. The analyses of their gene structures, deduced amino acid sequences, protein model structures, and phylogenetic trees confirmed the accurate identification of olive flounder IL-12. The protein structure model suggested that an inter-subunit disulfide bond might be formed between the Cys177 of p35 and Cys74 of p40 to link the subunits. Olive flounder expressed IL-12p40 at higher levels than IL-12p35 in the various tissues under natural conditions although both expression levels were low. However, when infected by Edwardsiella tarda or stimulated by LPS, the flounder expressed both of the subunit genes at similar maximized levels in 6 h and gradually reduced thereafter. Olive flounder PBMC induced with the rIL-12 increased IFN-γ and TNF-α expression but decreased IL-10 expression as did treatment with LPS. However, when the LPS-treated PBMC were neutralized with the rIL-12-specific antibody, the pattern of cytokine expression was precisely reversed. In conclusion, we have formally identified the gene structure and function of olive flounder IL-12.
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Affiliation(s)
- Daniel Kim
- School of Life Science, Handong University, 558 Handong-ro, Pohang-city, Gyeongbuk, 37554, South Korea
| | - Soon Ho Lee
- School of Life Science, Handong University, 558 Handong-ro, Pohang-city, Gyeongbuk, 37554, South Korea
| | - Hayoung Lee
- School of Life Science, Handong University, 558 Handong-ro, Pohang-city, Gyeongbuk, 37554, South Korea
| | - Seong-Jung Kim
- School of Life Science, Handong University, 558 Handong-ro, Pohang-city, Gyeongbuk, 37554, South Korea
| | - Kwan Hee Lee
- Immunus (Co. Ltd.) Nehemiah hall Rm. 301, Handong University, 558 Handong-ro, Pohang-city, Gyeongbuk, 37554, South Korea
| | - Seong Kyu Song
- School of Life Science, Handong University, 558 Handong-ro, Pohang-city, Gyeongbuk, 37554, South Korea.
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26
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Feng S, Qiu X, Wang Y, Zhang N, Liao B, Wang X, Zhang A, Yang K, Zhou H. Production and functional insights into the potential regulation of three isoforms of grass carp p40 subunit in inflammation. FISH & SHELLFISH IMMUNOLOGY 2019; 89:403-410. [PMID: 30978447 DOI: 10.1016/j.fsi.2019.04.015] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/18/2018] [Revised: 03/28/2019] [Accepted: 04/05/2019] [Indexed: 06/09/2023]
Abstract
The p40 subunit is known as a component of Interleukin (IL)-12 and IL-23. In mammals, p40 can be secreted as a monomer or homodimer and acts independently to mediate cellular responses. Recently, three p40 paralogues were isolated and identified from grass carp and other fish species, but whether they exist independently as well as their functional consequences and significance remain unclear. In the present study, using grass carp as the model, we for the first time demonstrated the existence of natural fish p40a, p40b and p40c (gcp40a, gcp40b and gcp40c) mainly as a monomer in culture supernatant of head kidney leukocytes (HKLs). Particularly, their excessive secretion induced by various immune stimuli suggests possible involvement of free p40s in fish immune responses. To define their functions, recombinant grass carp p40a/b/c (rgcp40a, rgcp40b and rgcp40c) were prepared by Pichia pastoris expression system, and they possessed the activities to enhance the secretion of pro-inflammatory cytokines including Il-1β and tumor necrosis factor-α (Tnf-α) in grass carp HKLs. These pro-inflammatory properties of p40 isoforms prompted us to investigate their roles during the inflammatory process. In line with this, in vivo study revealed the pathogenic effect of rgcp40a on intestinal inflammation, whereas gcp40a polyclonal antibodies remarkably ameliorated Aeromonas hydrophila-induced intestinal histopathological changes. Taken together, our results uncover the biological significance of free p40s in teleost, and provide new clue for targeting fish intestinal inflammation.
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Affiliation(s)
- Shiyu Feng
- School of Life Science and Technology, University of Electronic Science and Technology of China, Chengdu, People's Republic of China
| | - Xingyang Qiu
- School of Life Science and Technology, University of Electronic Science and Technology of China, Chengdu, People's Republic of China
| | - Yanyan Wang
- School of Life Science and Technology, University of Electronic Science and Technology of China, Chengdu, People's Republic of China
| | - Na Zhang
- School of Life Science and Technology, University of Electronic Science and Technology of China, Chengdu, People's Republic of China
| | - Bohua Liao
- School of Life Science and Technology, University of Electronic Science and Technology of China, Chengdu, People's Republic of China
| | - Xinyan Wang
- School of Life Science and Technology, University of Electronic Science and Technology of China, Chengdu, People's Republic of China
| | - Anying Zhang
- School of Life Science and Technology, University of Electronic Science and Technology of China, Chengdu, People's Republic of China
| | - Kun Yang
- School of Life Science and Technology, University of Electronic Science and Technology of China, Chengdu, People's Republic of China
| | - Hong Zhou
- School of Life Science and Technology, University of Electronic Science and Technology of China, Chengdu, People's Republic of China.
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27
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Zhang XY, Cui ZW, Wu N, Lu XB, Lu LF, Chen DD, Geng H, Zhang YA. Investigating the potential immune role of IL-35 in grass carp (Ctenopharyngodon idella). DEVELOPMENTAL AND COMPARATIVE IMMUNOLOGY 2019; 93:78-88. [PMID: 30590066 DOI: 10.1016/j.dci.2018.12.011] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/06/2018] [Revised: 12/20/2018] [Accepted: 12/20/2018] [Indexed: 06/09/2023]
Abstract
Interleukin-35 (IL-35) is a member of the IL-12 cytokine family and a heterodimeric protein formed by Epstein-Barr virus-induced gene 3 (EBI3) and IL-12p35. Emerging evidence showed that IL-35 is a key player in the regulation of cellular communication, differentiation, and inflammation. To date, no studies on fish IL-35 have been documented. In this work, we first identify two splicing isoforms of EBI3, EBI3a and EBI3b, from grass carp (Ctenopharyngodon idella). EBI3a is composed of 299 amino acid residues and possesses an immunoglobulin-like (Ig-like) domain and a fibronectin type 3 (FN3) domain that is a conservative domain in vertebrate EBI3. However, the EBI3b is composed of 177 amino acid residues and only contains an Ig-like domain. The result of Co-immunoprecipitation suggests that only EBI3a can associate with IL-12p35 to form IL-35 in grass carp. Like the function of IL-35 in human and mouse, recombinant grass carp IL-35 protein could induce the expression of genes EBI3a, IL-12p35, and CD25-like and downregulate the expression of genes CD4-1, CD4-2, IL-17A/F1, and RORγ2. Taken together, these results indicate for the first time that a teleost IL-35 may also have the ability to induce regulatory T (Treg) cells, inhibit effector T (Teff) cell proliferation and restrict the differentiation and function of T helper 17 (Th17) cells in teleost.
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Affiliation(s)
- Xiang-Yang Zhang
- Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, 430072, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Zheng-Wei Cui
- Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, 430072, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Nan Wu
- Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, 430072, China
| | - Xiao-Bing Lu
- Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, 430072, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Long-Feng Lu
- Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, 430072, China
| | - Dan-Dan Chen
- Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, 430072, China
| | - Hui Geng
- Hubei Key Laboratory of Genetic Regulation and Integrative Biology, School of Life Sciences, Central China Normal University, Wuhan 430079, China.
| | - Yong-An Zhang
- Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, 430072, China; State Key Laboratory of Agricultural Microbiology, College of Fisheries, Huazhong Agricultural University, Wuhan, 430070, China; Laboratory for Marine Biology and Biotechnology, Qingdao National Laboratory for Marine Science and Technology, Qingdao, China.
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28
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Wangkahart E, Secombes CJ, Wang T. Dissecting the immune pathways stimulated following injection vaccination of rainbow trout (Oncorhynchus mykiss) against enteric redmouth disease (ERM). FISH & SHELLFISH IMMUNOLOGY 2019; 85:18-30. [PMID: 28757198 DOI: 10.1016/j.fsi.2017.07.056] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/12/2017] [Revised: 07/18/2017] [Accepted: 07/26/2017] [Indexed: 06/07/2023]
Abstract
Enteric redmouth disease (ERM or yersiniosis) is one of the most important diseases of salmonids and leads to significant economic losses. It is caused by the Gram-negative bacterium Yersinia ruckeri but can be controlled by bacterin vaccination. The first commercial ERM vaccine was licenced in 1976 and is one of the most significant and successful health practices within the aquaculture industry. Although ERM vaccination provides complete protection, knowledge of the host immune response to the vaccine and the molecular mechanisms that underpin the protection elicited is limited. In this report, we analysed the expression in spleen and gills of a large set of genes encoding for cytokines, acute phase proteins (APPs) and antimicrobial peptides (AMPs) in response to ERM vaccination in rainbow trout, Oncorhynchus mykiss. Many immune genes in teleost fish are known to have multiple paralogues that can show differential responses to ERM vaccination, highlighting the necessity to determine whether all of the genes present react in a similar manner. ERM vaccination immediately activated a balanced inflammatory response with correlated expression of both pro- and anti-inflammatory cytokines (eg IL-1β1-2, TNF-α1-3, IL-6, IL-8 and IL-10A etc.) in the spleen. The increase of pro-inflammatory cytokines may explain the systemic upregulation of APPs (eg serum amyloid A protein and serum amyloid protein P) and AMPs (eg cathelicidins and hepcidin) seen in both spleen and gills. We also observed an upregulation of all the α-chains but only one β-chain (p40B2) of the IL-12 family cytokines, that suggests specific IL-12 and IL-23 isoforms with distinct functions might be produced in the spleen of vaccinated fish. Notably the expression of Th1 cytokines (IFN-γ1-2) and a Th17 cytokine (IL-17A/F1a) was also up-regulated and correlated with enhanced expression of the IL-12 family α-chains, and the majority of pro- and anti-inflammatory cytokines, APPs and AMPs. These expression profiles may suggest that ERM vaccination activates host innate immunity and expression of specific IL-12 and IL-23 isoforms leading to a Th1 and Th17 biased immune response. A late induction of Th2 cytokines (IL-4/13B1-2) was also observed, that may have a homeostatic role and/or involvement in antibody production. This study has increased our understanding of the host immune response to ERM vaccination and the adaptive pathways involved. The early responses of a set of genes established in this study may provide essential information and function as biomarkers in future vaccine development in aquaculture.
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Affiliation(s)
- Eakapol Wangkahart
- Scottish Fish Immunology Research Centre, School of Biological Sciences, University of Aberdeen, Aberdeen AB24 2TZ, UK; Division of Fisheries, Department of Agricultural Technology, Faculty of Technology, Mahasarakham University, Khamriang Sub-District, Kantarawichai, Mahasarakham 44150, Thailand
| | - Christopher J Secombes
- Scottish Fish Immunology Research Centre, School of Biological Sciences, University of Aberdeen, Aberdeen AB24 2TZ, UK.
| | - Tiehui Wang
- Scottish Fish Immunology Research Centre, School of Biological Sciences, University of Aberdeen, Aberdeen AB24 2TZ, UK.
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Wangkahart E, Secombes CJ, Wang T. Studies on the Use of Flagellin as an Immunostimulant and Vaccine Adjuvant in Fish Aquaculture. Front Immunol 2019; 9:3054. [PMID: 30687309 PMCID: PMC6333709 DOI: 10.3389/fimmu.2018.03054] [Citation(s) in RCA: 41] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2018] [Accepted: 12/10/2018] [Indexed: 12/12/2022] Open
Abstract
Immunostimulants and vaccines are important for controlling infectious diseases in fish aquaculture. In this study we assess the potential of flagellin to be used for such purposes in rainbow trout (Oncorhynchus mykiss). A recombinant flagellin from the salmonid pathogen Yersinia ruckeri (YRF) has been produced previously by us and shown to be a potent activator of inflammatory cytokines, acute phase proteins and antimicrobial peptides in vitro. Here we show that YRF is the most potent inflammatory activator of three bacterial PAMPs (LPS, peptidoglycan and flagellin) tested. The host response to flagellin was next studied in vivo. The YRF modulated gene expression was examined in two systemic (spleen and liver) and two mucosa-associated (gills and skin) tissues. YRF injection initiated a transient systemic inflammatory response with key pro-inflammatory cytokines (IL-1β, TNFα, IL-6, and IL-11 etc.) and chemokines (CXCL_F4 and CXCL-8) induced rapidly (by 6 h) but subsiding quickly (by 24 h) in multiple tissues. Consequently, a variety of anti-microbial pathways were activated systemically with heightened expression of acute phase proteins, antimicrobial peptides and complement genes in multiple tissues, which was sustained to 24 h in the liver and mucosal tissues. The Th17 cytokine IL-17A/F1 was also induced in the spleen and liver, and Th2 cytokine IL-4/13 was induced in the liver. However, the anti-inflammatory IL-10 and the Th1 cytokine IFNγ were refractory. A secreted form of TLR5 (TLR5s) was induced by flagellin in all tissues examined whilst the membrane form was refractory, suggesting that TLR5s may function as a negative feedback regulator. Trout liver appeared to be an important organ responding to flagellin stimulation, with marked induction of IL-11, IL-23P19, IL-17C1, SAA, and cathelicidin-2. YRF induced a strong antibody response. These antibodies reacted against the middle domain of YRF and were able to decrease YRF bioactivity. Intact YRF was necessary for its bioactivity, as deletion of the N-terminal, C terminal or middle domain of YRF led to functional loss. This study suggests that flagellin could be a potent immunostimulant and vaccine adjuvant for fish aquaculture.
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Affiliation(s)
- Eakapol Wangkahart
- Division of Fisheries, Department of Agricultural Technology, Faculty of Technology, Mahasarakham University, Mahasarakham, Thailand.,Scottish Fish Immunology Research Centre, School of Biological Sciences, University of Aberdeen, Aberdeen, United Kingdom
| | - Christopher J Secombes
- Scottish Fish Immunology Research Centre, School of Biological Sciences, University of Aberdeen, Aberdeen, United Kingdom
| | - Tiehui Wang
- Scottish Fish Immunology Research Centre, School of Biological Sciences, University of Aberdeen, Aberdeen, United Kingdom
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30
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Chen X, Wang P, Zhao C, Yan L, Lin H, Qiu L. Molecular characterization and functional analysis of IL-12p40 from Chinese sea bass (Lateolabrax maculatus) under biotic and abiotic stresses. FISH & SHELLFISH IMMUNOLOGY 2018; 83:373-385. [PMID: 30227255 DOI: 10.1016/j.fsi.2018.09.038] [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: 07/03/2018] [Revised: 08/21/2018] [Accepted: 09/12/2018] [Indexed: 06/08/2023]
Abstract
Interleukins are critical cytokines that are ubiquitously present in both vertebrates and invertebrates and constitute the front line of host innate immunity. Here, we identified and analyzed IL-12p40 from the Chinese sea bass Lateolabrax maculatus (LmIL-12p40). The LmIL-12p40 gene is expressed as a 1386-base pair transcript that encodes a polypeptide of 321 amino acids. Transcriptional expression analysis indicated that LmIL-12p40 mRNA was ubiquitously expressed in all tested tissues and had a comparatively high expression level in immune-associated tissues (head-kidney and intestines). Quantitative reverse-transcriptase polymerase chain reaction (qRT-PCR) experiments showed that, after Vibro harveyi and Streptococus agalactiae infection, LmIL-12p40 mRNA expression was significantly up-regulated in the spleen, liver and head-kidney. To further clarify the immune function of LmIL-12p40 after bacterial challenge, the recombinant LmIL-12p40 protein was acquired using a prokaryotic expression method. Furthermore, the LmIL-12p40 dimer (LmIL-12p80) could be produced via protein-protein interactions by incubating p40 monomer expressed from the pET28a vector (pET28a-LmIL-12p40) with p40 monomer expressed from the pGEX4T-1 vector (pGEX4T-1-LmIL-12p40). The antimicrobial activity of the purified LmIL-12p40 and LmIL-12p80 proteins were further studied in vitro using a bacterial growth inhibition test (for both liquid and solid cultures) and in vivo (using a bacterial growth inhibition test with the head-kidney tissues). Furthermore, BL21 (DE3) E. coli cells transformed with the recombinant pET28a-LmIL-12p40 vector were dramatically protected in response to metal toxicity and H2O2-related oxidative stress. In summary, this study will provide foundational information regarding the role of LmIL-12p40 in defending against various biotic and abiotic stresses in fishes, which should help to further clarify the functional mechanism of interleukins.
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Affiliation(s)
- Xiang Chen
- Key Laboratory of South China Sea Fishery Resources Exploitation & Utilization, Ministry of Agriculture, South China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou, PR China; National Demonstration Center for Experimental Fisheries Science Education, Shanghai Ocean University, Shanghai, PR China
| | - Pengfei Wang
- Key Laboratory of South China Sea Fishery Resources Exploitation & Utilization, Ministry of Agriculture, South China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou, PR China
| | - Chao Zhao
- Key Laboratory of South China Sea Fishery Resources Exploitation & Utilization, Ministry of Agriculture, South China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou, PR China
| | - Lulu Yan
- Key Laboratory of South China Sea Fishery Resources Exploitation & Utilization, Ministry of Agriculture, South China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou, PR China
| | - Heizhao Lin
- Shenzhen Base of South China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Shenzhen, PR China
| | - Lihua Qiu
- Key Laboratory of South China Sea Fishery Resources Exploitation & Utilization, Ministry of Agriculture, South China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou, PR China; Guangdong Provincial Key Laboratory of Fishery Ecology and Environment, Guangzhou, PR China.
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31
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Redmond AK, Macqueen DJ, Dooley H. Phylotranscriptomics suggests the jawed vertebrate ancestor could generate diverse helper and regulatory T cell subsets. BMC Evol Biol 2018; 18:169. [PMID: 30442091 PMCID: PMC6238376 DOI: 10.1186/s12862-018-1290-2] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2017] [Accepted: 11/02/2018] [Indexed: 12/14/2022] Open
Abstract
BACKGROUND The cartilaginous fishes diverged from other jawed vertebrates ~ 450 million years ago (mya). Despite this key evolutionary position, the only high-quality cartilaginous fish genome available is for the elephant shark (Callorhinchus milii), a chimaera whose ancestors split from the elasmobranch lineage ~ 420 mya. Initial analysis of this resource led to proposals that key components of the cartilaginous fish adaptive immune system, most notably their array of T cell subsets, was primitive compared to mammals. This proposal is at odds with the robust, antigen-specific antibody responses reported in elasmobranchs following immunization. To explore this discrepancy, we generated a multi-tissue transcriptome for small-spotted catshark (Scyliorhinus canicula), a tractable elasmobranch model for functional studies. We searched this, and other newly available sequence datasets, for CD4+ T cell subset-defining genes, aiming to confirm the presence or absence of each subset in cartilaginous fishes. RESULTS We generated a new transcriptome based on a normalised, multi-tissue RNA pool, aiming to maximise representation of tissue-specific and lowly expressed genes. We utilized multiple transcriptomic datasets and assembly variants in phylogenetic reconstructions to unambiguously identify several T cell subset-specific molecules in cartilaginous fishes for the first time, including interleukins, interleukin receptors, and key transcription factors. Our results reveal the inability of standard phylogenetic reconstruction approaches to capture the site-specific evolutionary processes of fast-evolving immune genes but show that site-heterogeneous mixture models can adequately do so. CONCLUSIONS Our analyses reveal that cartilaginous fishes are capable of producing a range of CD4+ T cell subsets comparable to that of mammals. Further, that the key molecules required for the differentiation and functioning of these subsets existed in the jawed vertebrate ancestor. Additionally, we highlight the importance of considering phylogenetic diversity and, where possible, utilizing multiple datasets for individual species, to accurately infer gene presence or absence at higher taxonomic levels.
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Affiliation(s)
- Anthony K Redmond
- School of Biological Sciences, University of Aberdeen, Aberdeen, AB24 2TZ, UK
- Centre for Genome-Enabled Biology & Medicine, University of Aberdeen, Aberdeen, AB24 2TZ, UK
- Present address: Smurfit Institute of Genetics, Trinity College Dublin, University of Dublin, Dublin 2, Ireland
| | - Daniel J Macqueen
- School of Biological Sciences, University of Aberdeen, Aberdeen, AB24 2TZ, UK
| | - Helen Dooley
- School of Biological Sciences, University of Aberdeen, Aberdeen, AB24 2TZ, UK.
- Department of Microbiology & Immunology, University of Maryland School of Medicine, Institute of Marine & Environmental Technology, 701 E Pratt St, Baltimore, MD21202, USA.
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32
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Mu P, Wang Y, Ao J, Ai C, Chen X. Molecular cloning and bioactivity of an IL-2 homologue in large yellow croaker (Larimichthys crocea). FISH & SHELLFISH IMMUNOLOGY 2018; 81:309-317. [PMID: 30030115 DOI: 10.1016/j.fsi.2018.07.040] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/13/2018] [Revised: 07/12/2018] [Accepted: 07/17/2018] [Indexed: 06/08/2023]
Abstract
Interleukin-2 (IL-2), an important immunomodulatory cytokine, plays a crucial role in promoting the proliferation, activation and differentiation of T cells. Here, the cDNA of an IL-2 homologue (LcIL-2) in large yellow croaker (Larimichthys crocea) was cloned by RACE-PCR techniques. The open reading frame (ORF) of LcIL-2 gene is 426 bp long and encoded a precursor protein of 141 amino acids (aa), with a 20-aa signal peptide and a 121-aa mature peptide containing two putative N-glycosylation sites at Asn77 and Asn101. The LcIL-2 is preferentially expressed in lymphocytes-rich tissues, such as spleen and blood, and is increased in head kidney and spleen upon inactivated trivalent bacterial vaccine or poly(I:C) stimulation. LcIL-2 expression could also be detected in primary head kidney leukocytes (PKL), primary head kidney macrophages (PKM) and primary head kidney granulocytes (PKG), with the highest level in PKL. In addition, the expression level of LcIL-2 in PKL was slightly induced by LPS or poly(I:C), while markedly induced by PHA or Con-A. The recombinant LcIL-2 protein produced in Pichia pastoris could increase the expression of genes involved in Th1 (IL-2, IFN-γ and T-bet) and Th2 (IL-4/13A, IL-4/13B and GATA3) development and differentiation, and of the IL-2 downstream transcription factor STAT5B gene, but inhibit the expression of genes related to Th17 (IL-17A/F2 and IL-17A/F3) development and differentiation. Taken together, our results indicated that LcIL-2 possesses similar structural and functional characteristics to other vertebrate IL-2s, and may play a role in T cell development and differentiation.
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Affiliation(s)
- Pengfei Mu
- College of Ocean and Earth Sciences, Xiamen University, Xiamen, 361102, China; Key Laboratory of Marine Biogenetic Resources, Third Institute of Oceanography, State Oceanic Administration, Xiamen, 361005, China; Institute of Oceanology, Fujian Agriculture and Forestry University, Fuzhou, 350002, China
| | - Yuhua Wang
- Key Laboratory of Marine Biogenetic Resources, Third Institute of Oceanography, State Oceanic Administration, Xiamen, 361005, China
| | - Jingqun Ao
- Key Laboratory of Marine Biogenetic Resources, Third Institute of Oceanography, State Oceanic Administration, Xiamen, 361005, China
| | - Chunxiang Ai
- College of Ocean and Earth Sciences, Xiamen University, Xiamen, 361102, China.
| | - Xinhua Chen
- Key Laboratory of Marine Biogenetic Resources, Third Institute of Oceanography, State Oceanic Administration, Xiamen, 361005, China; 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.
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33
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Attaya A, Wang T, Zou J, Herath T, Adams A, Secombes CJ, Yoon S. Gene expression analysis of isolated salmonid GALT leucocytes in response to PAMPs and recombinant cytokines. FISH & SHELLFISH IMMUNOLOGY 2018; 80:426-436. [PMID: 29906623 DOI: 10.1016/j.fsi.2018.06.022] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/29/2018] [Revised: 05/30/2018] [Accepted: 06/11/2018] [Indexed: 06/08/2023]
Abstract
Increased knowledge of the immune response of the intestine, a physiologically critical organ involved in absorption, secretion and homeostasis in a non-sterile environment, is needed to better understand the mechanisms involved in the induction of long-lasting immunity and, subsequently, the development of efficacious gastrointestinal immunization approaches. To this end, analysis of isolated gut cells will give an insight into the cell types present and their immune capability. Hence, in this study we first optimised a method for salmonid gut leucocyte isolation and characterised the cells on the basis of their expression of a range of selected cell markers associated with T & B cells and dendritic cells. The GALT leucocytes were then stimulated with a variety of PAMPs, recombinant cytokines and PHA, as a means to help characterise the diversity of the immune repertoire present in such cells. The stimulants tested were designed to examine the nature of the antibacterial, antiviral and T cell type responses in the cells (at the transcript level) using a panel of genes relevant to innate and adaptive immunity. The results showed distinct responses to the stimulants, with a clear delineation seen between the stimulant used (eg viral or bacterial PAMP) and the pathway elicited. The changes in the expression patterns of the immune genes in these cells indicates that the salmonid intestine contains a good repertoire of competent immune cells able to respond to different pathogen types. Such information may aid the development of efficient priming by oral vaccination in salmonids.
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Affiliation(s)
- A Attaya
- Scottish Fish Immunology Research Centre, Institute of Biological and Environmental Sciences, University of Aberdeen, Aberdeen, AB24 2TZ, UK
| | - T Wang
- Scottish Fish Immunology Research Centre, Institute of Biological and Environmental Sciences, University of Aberdeen, Aberdeen, AB24 2TZ, UK
| | - J Zou
- Scottish Fish Immunology Research Centre, Institute of Biological and Environmental Sciences, University of Aberdeen, Aberdeen, AB24 2TZ, UK
| | - T Herath
- Institute of Aquaculture, University of Stirling, Stirling, FK9 4LA, UK
| | - A Adams
- Institute of Aquaculture, University of Stirling, Stirling, FK9 4LA, UK
| | - C J Secombes
- Scottish Fish Immunology Research Centre, Institute of Biological and Environmental Sciences, University of Aberdeen, Aberdeen, AB24 2TZ, UK.
| | - S Yoon
- Scottish Fish Immunology Research Centre, Institute of Biological and Environmental Sciences, University of Aberdeen, Aberdeen, AB24 2TZ, UK.
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Wang T, Hu Y, Wangkahart E, Liu F, Wang A, Zahran E, Maisey KR, Liu M, Xu Q, Imarai M, Secombes CJ. Interleukin (IL)-2 Is a Key Regulator of T Helper 1 and T Helper 2 Cytokine Expression in Fish: Functional Characterization of Two Divergent IL2 Paralogs in Salmonids. Front Immunol 2018; 9:1683. [PMID: 30093902 PMCID: PMC6070626 DOI: 10.3389/fimmu.2018.01683] [Citation(s) in RCA: 49] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2018] [Accepted: 07/09/2018] [Indexed: 12/13/2022] Open
Abstract
Mammalian interleukin (IL)-2 is a cytokine centrally involved in the differentiation and survival of CD4+ T helper subsets and CD4+ T regulatory cells and in activation of cytotoxic effector lymphocytes. In bony fish, IL2 orthologs have been identified with an additional divergent IL2-Like gene on the same locus present in several fish species. We report here two divergent IL2 paralogs, IL2A and IL2B, in salmonids that originated from the whole genome duplication event in this fish lineage. The salmonid IL2 paralogs differ not only in sequence but also in exon sizes. The IL-2 isoforms that are encoded have disparate pI values and may have evolved to preferentially bind specific IL-2 receptors. Rainbow trout IL2 paralogs are highly expressed in thymus, spleen, gills, kidney and intestine, important tissues/organs in fish T cell development and function. Their expression in peripheral blood leukocytes (PBL) is low constitutively but can be upregulated by the mixed leukocyte reaction, by the T cell mitogen phytohemagglutinin and by signal mimics of T cell activation (phorbol 12-myristate 13-acetate and calcium ionophore). Both trout IL-2 isoforms promoted PBL proliferation and sustained high-level expression of CD4 and CD8, suggesting that trout IL-2 isoforms are T cell growth/survival factors mainly expressed by activated T cells. The recombinant proteins for these two trout IL2 paralogs have been produced in E. coli and possess shared but also distinct bioactivities. IL-2A, but not IL-2B, induced IL12P35A1 and CXCR1 expression in PBL. IL-2B had a stronger effect on upregulation of the T helper 1 (Th1) cytokine interferon-γ (IFNγ) and could sustain CD8α and CD8β expression levels. Nevertheless, both cytokines upregulated key Th1 (IFNγ1, IFNγ2, TNFα2 and IL12) and T helper 2 (Th2) cytokines (IL4/13B1 and IL4/13B2), cytokine and chemokine receptors and the antimicrobial peptide cathelicidin-1 but had limited effects on T helper 17 cytokines and TGFβ1 in PBL. They could also enhance PBL phagocytosis. These results suggest, for the first time in fish, that IL-2 isoforms may have an important role in regulating Th1 and Th2 cell development, and innate and adaptive host defenses in fish, and shed light on lineage-specific expansion, evolution, and functional diversification of IL2 in vertebrates.
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Affiliation(s)
- Tiehui Wang
- Scottish Fish Immunology Research Centre, School of Biological Sciences, University of Aberdeen, Aberdeen, United Kingdom
| | - Yehfang Hu
- Scottish Fish Immunology Research Centre, School of Biological Sciences, University of Aberdeen, Aberdeen, United Kingdom
| | - Eakapol Wangkahart
- Scottish Fish Immunology Research Centre, School of Biological Sciences, University of Aberdeen, Aberdeen, United Kingdom.,Division of Fisheries, Department of Agricultural Technology, Faculty of Technology, Mahasarakham University, Kantharawichai, Thailand
| | - Fuguo Liu
- Scottish Fish Immunology Research Centre, School of Biological Sciences, University of Aberdeen, Aberdeen, United Kingdom
| | - Alex Wang
- Scottish Fish Immunology Research Centre, School of Biological Sciences, University of Aberdeen, Aberdeen, United Kingdom
| | - Eman Zahran
- Scottish Fish Immunology Research Centre, School of Biological Sciences, University of Aberdeen, Aberdeen, United Kingdom.,Department of Internal Medicine, Infectious and Fish Diseases, Faculty of Veterinary Medicine, Mansoura University, Mansoura, Egypt
| | - Kevin R Maisey
- Laboratorio de Immunologia, Centro de Biotecnología Acuícola, Departamento de Biología, Facultad de Química y Biología, Universidad de Santiago de Chile, Santiago, Chile
| | - Min Liu
- Scottish Fish Immunology Research Centre, School of Biological Sciences, University of Aberdeen, Aberdeen, United Kingdom.,College of Animal Science and Technology, Northeast Agriculture University, Harbin, China
| | - Qiaoqing Xu
- Scottish Fish Immunology Research Centre, School of Biological Sciences, University of Aberdeen, Aberdeen, United Kingdom.,School of Animal Science, Yangtze University, Jingzhou, China
| | - Mónica Imarai
- Laboratorio de Immunologia, Centro de Biotecnología Acuícola, Departamento de Biología, Facultad de Química y Biología, Universidad de Santiago de Chile, Santiago, Chile
| | - Christopher J Secombes
- Scottish Fish Immunology Research Centre, School of Biological Sciences, University of Aberdeen, Aberdeen, United Kingdom
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Yi Y, Zhang Z, Zhao F, Liu H, Yu L, Zha J, Wang G. Probiotic potential of Bacillus velezensis JW: Antimicrobial activity against fish pathogenic bacteria and immune enhancement effects on Carassius auratus. FISH & SHELLFISH IMMUNOLOGY 2018; 78:322-330. [PMID: 29702236 DOI: 10.1016/j.fsi.2018.04.055] [Citation(s) in RCA: 93] [Impact Index Per Article: 15.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/27/2018] [Revised: 04/17/2018] [Accepted: 04/23/2018] [Indexed: 06/08/2023]
Abstract
This study evaluated the probiotic potential of B. velezensis JW through experimental and genomic analysis approaches. Strain JW showed antimicrobial activity against a broad range of fish pathogenic bacteria including Aeromonas hydrophila, Aeromonas salmonicida, Lactococcus garvieae, Streptococcus agalactiae, and Vibrio Parahemolyticus. Fish (Carassius auratus) were fed with the diets containing 0 (control), 107, and 109 cfu/g of B. velezensis JW for 4 weeks. Various immune parameters were examined at 1, 2, 3, and 4 weeks of post-feeding. Results showed that JW supplemented diets significantly increased acid phosphatase (ACP), alkaline phosphatase (AKP), and glutathione peroxidase (GSH-PX) activity. The mRNA expression of immune-related genes in the head kidney of C. auratus was measured. Among them, the interferon gamma gene (IFN- γ) and tumor necrosis factor-α (TNF-α) showed higher expression after 3 and 4 weeks of feeding (P < 0.05). The expression of interleukin-1 (IL-1) only being significantly upregulated by 109 cfu/g of JW after 1 week of feeding (P < 0.05). The upregulation of interleukin-4 (IL-4) increased over time from 1st to 4th week. The expression of interleukin-10 (IL-10) and interleukin-12 (IL-12) showed an opposite expression pattern with IL-10 significantly upregulated and IL-12 significantly downregulated by JW containing diets at 2, 3, and 4 weeks of post-feeding (P < 0.05). Moreover, fish fed with JW supplemented diets showed significantly improved survival rate after A. hydrophila infection. The analysis of the genome of JW revealed several features aiding host health and being relevant to the GIT adaptation. Four bacteriocins, three Polyketide Synthetase (PKS), and five Nonribosomal Peptide-Synthetase (NRPS) gene clusters were identified in the genome. In summary, the above results clearly proved that B. velezensis JW has the potential to be developed as a probiotic agent in aquaculture.
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Affiliation(s)
- Yanglei Yi
- College of Animal Science and Technology, Northwest A&F University, Yangling 712100, China; Molecular Genetics, University of Groningen, Groningen, The Netherlands
| | - Zhenhua Zhang
- Molecular Genetics, University of Groningen, Groningen, The Netherlands
| | - Fan Zhao
- College of Veterinary Medicine, Northwest A&F University, Yangling 712100, China
| | - Huan Liu
- College of Veterinary Medicine, Northwest A&F University, Yangling 712100, China
| | - Lijun Yu
- College of Veterinary Medicine, Northwest A&F University, Yangling 712100, China
| | - Jiwei Zha
- College of Animal Science and Technology, Northwest A&F University, Yangling 712100, China
| | - Gaoxue Wang
- College of Animal Science and Technology, Northwest A&F University, Yangling 712100, China.
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36
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Veenstra KA, Wangkahart E, Wang T, Tubbs L, Ben Arous J, Secombes CJ. Rainbow trout (Oncorhynchus mykiss) adipose tissue undergoes major changes in immune gene expression following bacterial infection or stimulation with pro-inflammatory molecules. DEVELOPMENTAL AND COMPARATIVE IMMUNOLOGY 2018; 81:83-94. [PMID: 29126991 DOI: 10.1016/j.dci.2017.11.001] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/10/2017] [Revised: 11/06/2017] [Accepted: 11/06/2017] [Indexed: 06/07/2023]
Abstract
In mammals, visceral adipose is increasingly seen as playing an important role in immune function with numerous pro-inflammatory, anti-inflammatory and immune-modulating proteins and peptides being identified in adipocytes. Adipose is also now known as a tissue that has an important role in the regulation of peritoneal immune responses. Despite this, only lately has consideration been given to visceral adipose as an important immune tissue in fish, especially in the context of intraperitoneal vaccination. The present study demonstrates that fish visceral adipose is capable of expressing a large range of immune molecules in response to stimulation with a live bacterium (A. salmonicida), a bacterial PAMP (Y. ruckeri flagellin), and the pro-inflammatory cytokines IL-1β, TNF-α3 and IFN-γ. Following infection and stimulation with flagellin and IL-1β a large upregulation of pro-inflammatory and antimicrobial molecules was seen, with a high degree of overlap. TNF-α treatment affected relatively few genes and the effects were more modest. IFN-γ had the smallest impact on adipose but IFN-γ inducible genes showed some of the largest effects. Overall, it is clear that adipose tissue should be considered an active immune site in fish, capable of participating in and influencing immune responses.
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Affiliation(s)
- Kimberly A Veenstra
- Scottish Fish Immunology Research Centre, Institute of Biological and Environmental Sciences, University of Aberdeen, Tillydrone Avenue, Aberdeen, AB24 2TZ, UK.
| | - Eakapol Wangkahart
- Scottish Fish Immunology Research Centre, Institute of Biological and Environmental Sciences, University of Aberdeen, Tillydrone Avenue, Aberdeen, AB24 2TZ, UK; Division of Fisheries, Department of Agricultural Technology, Faculty of Technology, Mahasarakham University, Khamriang Sub-District, Kantarawichai, Mahasarakham, 44150, Thailand.
| | - Tiehui Wang
- Scottish Fish Immunology Research Centre, Institute of Biological and Environmental Sciences, University of Aberdeen, Tillydrone Avenue, Aberdeen, AB24 2TZ, UK.
| | - Lincoln Tubbs
- Elanco Canada Ltd., Aquaculture Research and Development, P.O. Box 17, Victoria, P.E., C0A 2G0, Canada.
| | | | - Christopher J Secombes
- Scottish Fish Immunology Research Centre, Institute of Biological and Environmental Sciences, University of Aberdeen, Tillydrone Avenue, Aberdeen, AB24 2TZ, UK.
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Reyes-Cerpa S, Vallejos-Vidal E, Gonzalez-Bown MJ, Morales-Reyes J, Pérez-Stuardo D, Vargas D, Imarai M, Cifuentes V, Spencer E, Sandino AM, Reyes-López FE. Effect of yeast (Xanthophyllomyces dendrorhous) and plant (Saint John's wort, lemon balm, and rosemary) extract based functional diets on antioxidant and immune status of Atlantic salmon (Salmo salar) subjected to crowding stress. FISH & SHELLFISH IMMUNOLOGY 2018; 74:250-259. [PMID: 29305990 DOI: 10.1016/j.fsi.2017.12.061] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/26/2017] [Revised: 12/18/2017] [Accepted: 12/31/2017] [Indexed: 06/07/2023]
Abstract
Salmon farming may face stress due to the intensive culture conditions with negative impacts on overall performance. In this aspect, functional feed improves not only the basic nutritional requirements but also the health status and fish growth. However, to date no studies have been carried out to evaluate the effect of functional diets in salmon subjected to crowding stress. Thus, the aim of this study was to evaluate the effect of yeast extract (Xanthophyllomyces dendrorhous; diet A) and the combination of plant extracts (common Saint John's wort, lemon balm, and rosemary; diet B) on the antioxidant and immune status of Atlantic salmon grown under normal cultured conditions and then subjected to crowding stress. Fish were fed with functional diets during 30 days (12 kg/m3) and then subjected to crowding stress (20 kg/m3) for 10 days. The lipid peroxidation in gut showed that both diets induced a marked decrease on oxidative damage when fish were subjected to crowding stress. The protein carbonylation in muscle displayed at day 30 a marked decrease in both functional diets that was more marked on the stress condition. The expression of immune markers (IFNγ, CD4, IL-10, TGF-β, IgMmb, IgMsec, T-Bet, and GATA-3) indicated the upregulation of those associated to humoral-like response (CD4, IL-10, GATA-3) when fish were subjected to crowding stress. These results were confirmed with the expression of secreted IgM. Altogether, these functional diets improved the antioxidant status and increased the expression of genes related to Th2-like response suggesting a protective role on fish subjected to crowding stress.
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Affiliation(s)
| | - Eva Vallejos-Vidal
- Department of Cell Biology, Physiology and Immunology, Faculty of Biosciences (Building C), Universitat Autonoma de Barcelona, 08193, Bellaterra, Spain
| | - María José Gonzalez-Bown
- Laboratorio de Virología, Centro de Biotecnología Acuícola, Departamento de Biología, Facultad de Química y Biología, Universidad de Santiago de Chile, Santiago, Chile
| | - Jonathan Morales-Reyes
- Laboratorio de Virología, Centro de Biotecnología Acuícola, Departamento de Biología, Facultad de Química y Biología, Universidad de Santiago de Chile, Santiago, Chile
| | - Diego Pérez-Stuardo
- Centro de Genómica y Bioinformática, Facultad de Ciencias, Universidad Mayor, Chile
| | - Deborah Vargas
- Laboratorio de Virología, Centro de Biotecnología Acuícola, Departamento de Biología, Facultad de Química y Biología, Universidad de Santiago de Chile, Santiago, Chile
| | - Mónica Imarai
- Laboratorio de Inmunología, Centro de Biotecnología Acuícola, Departamento de Biología, Facultad de Química y Biología, Universidad de Santiago de Chile, Santiago, Chile
| | - Víctor Cifuentes
- Laboratorio de Genética, Departamento de Ciencias Ecológicas, Facultad de Ciencias, Universidad de Chile, Santiago, Chile
| | - Eugenio Spencer
- Laboratorio de Virología, Centro de Biotecnología Acuícola, Departamento de Biología, Facultad de Química y Biología, Universidad de Santiago de Chile, Santiago, Chile
| | - Ana María Sandino
- Laboratorio de Virología, Centro de Biotecnología Acuícola, Departamento de Biología, Facultad de Química y Biología, Universidad de Santiago de Chile, Santiago, Chile; ActivaQ S.A. General del Canto 460, Providencia, Santiago, Chile.
| | - Felipe E Reyes-López
- Department of Cell Biology, Physiology and Immunology, Faculty of Biosciences (Building C), Universitat Autonoma de Barcelona, 08193, Bellaterra, Spain.
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38
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Valenzuela B, Rodríguez FE, Modak B, Imarai M. Alpinone exhibited immunomodulatory and antiviral activities in Atlantic salmon. FISH & SHELLFISH IMMUNOLOGY 2018; 74:76-83. [PMID: 29292197 DOI: 10.1016/j.fsi.2017.12.043] [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: 07/18/2017] [Revised: 12/16/2017] [Accepted: 12/22/2017] [Indexed: 06/07/2023]
Abstract
In this study, we seek to identify flavonoids able to regulate the gene expression of a group of cytokines important for the control of infections in Atlantic salmon (Salmo salar). Particularly, we studied the potential immunomodulatory effects of two flavonoids, Alpinone and Pinocembrine, which were isolated and purified from resinous exudates of Heliotropium huascoense and Heliotropium sinuatum, respectively. The transcript levels of TNF-α and IL-1 (inflammatory cytokines), IFN-γ and IL-12 (T helper 1 type cytokines), IL4/13A (Th2-type cytokine), IL-17 (Th17 type cytokine) TGF-β1 (regulatory cytokine) and IFN-α (antiviral cytokine) were quantified by qRT-PCR in kidneys of flavonoid-treated and control fish. We demonstrated that the administration of a single intramuscular dose of purified Alpinone increased the transcriptional expression of five cytokines, named TNF-α, IL-1, IFN-α, IFN-γ and TGF-β1 in treated fish compared to untreated fish. Conversely, administration of purified Pinocembrine reduced the transcriptional expression of TNF-α, IL-1 and IL-12 in the kidney of treated fish. No other changes were observed. Interestingly, Alpinone also induced in vitro antiviral effects against Infectious Salmon Anaemia virus. Results showed that Alpinone but not Pinocembrine induces the expression of cytokines, which in vertebrates are essential to control viral infections while Pinocembrine reduces pro-inflammatory cytokines. Altogether results suggest that Alpinone is a good candidate to be further tested as immunostimulant and antiviral drug.
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Affiliation(s)
- Beatriz Valenzuela
- Laboratory of Immunology, Center of Aquatic Biotechnology, Department of Biology, Faculty of Chemistry and Biology, University of Santiago of Chile, Av. Bernardo O'Higgins, 3363 Santiago, Chile.
| | - Felipe E Rodríguez
- Laboratory of Immunology, Center of Aquatic Biotechnology, Department of Biology, Faculty of Chemistry and Biology, University of Santiago of Chile, Av. Bernardo O'Higgins, 3363 Santiago, Chile.
| | - Brenda Modak
- Laboratory of Chemistry of Natural Products, Center of Aquatic Biotechnology, Department of Environmental Sciences, Faculty of Chemistry and Biology, University of Santiago of Chile, Av. Bernardo O'Higgins, 3363 Santiago, Chile.
| | - Mónica Imarai
- Laboratory of Immunology, Center of Aquatic Biotechnology, Department of Biology, Faculty of Chemistry and Biology, University of Santiago of Chile, Av. Bernardo O'Higgins, 3363 Santiago, Chile.
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39
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Wang X, Qin L, Du L, Chen D, Zhang A, Yang K, Zhou H. Identification of a single p19 gene and three p40 paralogues in grass carp (Ctenopharyngodon idellus): Their potential for the formation of interleukin 23 and inducible expression in vitro and in vivo. FISH & SHELLFISH IMMUNOLOGY 2017; 71:434-442. [PMID: 29024769 DOI: 10.1016/j.fsi.2017.10.009] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/21/2017] [Revised: 09/27/2017] [Accepted: 10/06/2017] [Indexed: 06/07/2023]
Abstract
Interleukin (IL-) 23, a member of IL-12 family, is a composite cytokine with the subunits of p19 and p40. Although IL-12 and IL-23 share the p40 subunit, they play vastly different roles in immune regulation. In teleost, much emphasis has been placed on the identification of IL-12, but evidence for the existence of IL-23 is still lacking. In the present study, a p19 gene and three p40 paralogues were isolated and identified from grass carp, suggesting multiple assembly of IL-23 molecules in fish species. To address this issue, the existence of different p19/p40 heterodimers were examined by Co-Immunoprecipitation (Co-IP) assay, showing that only co-expression of p19 and each p40 subunit could produce the soluble proteins corresponding to three IL-23 isoforms. Additionally, bacterial infection could up-regulate the mRNA expression of p19, p40a and p40b but not p40c in head kidney, indicating distinct expression patterns of three p40 paralogues. Moreover, in vitro experiments demonstrated that both B-cell stimulator, LPS and T-cell mitogen, PHA markedly increased the mRNA levels of p19 and three p40 paralogues in grass carp periphery blood lymphocytes (PBLs). The simultaneous up-regulation of mRNA expression of p19 and p40 paralogues in response to immune stimuli supports the idea that p19 may form heterodimeric molecules with three p40 subunits in grass carp under immune activation. These findings for the first time highlight the potential of p19 and p40 for dimerization in fish, particularly the existence of three IL-23 isoforms as soluble heterodimeric cytokines in grass carp, thereby providing the basis for further investigating the function of IL-23 in fish immunity.
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Affiliation(s)
- Xinyan Wang
- School of Life Science and Technology, University of Electronic Science and Technology of China, Chengdu, People's Republic of China
| | - Lei Qin
- School of Life Science and Technology, University of Electronic Science and Technology of China, Chengdu, People's Republic of China
| | - Linyong Du
- School of Life Science and Technology, University of Electronic Science and Technology of China, Chengdu, People's Republic of China
| | - Di Chen
- School of Life Science and Technology, University of Electronic Science and Technology of China, Chengdu, People's Republic of China
| | - Anying Zhang
- School of Life Science and Technology, University of Electronic Science and Technology of China, Chengdu, People's Republic of China
| | - Kun Yang
- School of Life Science and Technology, University of Electronic Science and Technology of China, Chengdu, People's Republic of China
| | - Hong Zhou
- School of Life Science and Technology, University of Electronic Science and Technology of China, Chengdu, People's Republic of China.
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40
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Wang T, Johansson P, Abós B, Holt A, Tafalla C, Jiang Y, Wang A, Xu Q, Qi Z, Huang W, Costa MM, Diaz-Rosales P, Holland JW, Secombes CJ. First in-depth analysis of the novel Th2-type cytokines in salmonid fish reveals distinct patterns of expression and modulation but overlapping bioactivities. Oncotarget 2017; 7:10917-46. [PMID: 26870894 PMCID: PMC4905449 DOI: 10.18632/oncotarget.7295] [Citation(s) in RCA: 79] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2015] [Accepted: 01/24/2016] [Indexed: 12/12/2022] Open
Abstract
IL-4 and IL-13 are closely related canonical type-2 cytokines in mammals and have overlapping bioactivities via shared receptors. They are frequently activated together as part of the same immune response and are the signature cytokines produced by T-helper (Th)2 cells and type-2 innate lymphoid cells (ILC2), mediating immunity against extracellular pathogens. Little is known about the origin of type-2 responses, and whether they were an essential component of the early adaptive immune system that gave a fitness advantage by limiting collateral damage caused by metazoan parasites. Two evolutionary related type-2 cytokines, IL-4/13A and IL-4/13B, have been identified recently in several teleost fish that likely arose by duplication of an ancestral IL-4/13 gene as a consequence of a whole genome duplication event that occurred at the base of this lineage. However, studies of their comparative expression levels are largely missing and bioactivity analysis has been limited to IL-4/13A in zebrafish. Through interrogation of the recently released salmonid genomes, species in which an additional whole genome duplication event has occurred, four genomic IL-4/13 loci have been identified leading to the cloning of three active genes, IL-4/13A, IL-4/13B1 and IL-4/13B2, in both rainbow trout and Atlantic salmon. Comparative expression analysis by real-time PCR in rainbow trout revealed that the IL-4/13A expression is broad and high constitutively but less responsive to pathogen-associated molecular patterns (PAMPs) and pathogen challenge. In contrast, the expression of IL-4/13B1 and IL-4/13B2 is low constitutively but is highly induced by viral haemorrhagic septicaemia virus (VHSH) infection and during proliferative kidney disease (PKD) in vivo, and by formalin-killed bacteria, PAMPs, the T cell mitogen PHA, and the T-cell cytokines IL-2 and IL-21 in vitro. Moreover, bioactive recombinant cytokines of both IL-4/13A and B were produced and found to have shared but also distinct bioactivities. Both cytokines rapidly induce the gene expression of antimicrobial peptides and acute phase proteins, providing an effector mechanism of fish type-2 cytokines in immunity. They are anti-inflammatory via up-regulation of IL-10 and down-regulation of IL-1β and IFN-γ. They modulate the expression of cellular markers of T cells, macrophages and B cells, the receptors of IFN-γ, the IL-6 cytokine family and their own potential receptors, suggesting multiple target cells and important roles of fish type-2 cytokines in the piscine cytokine network. Furthermore both cytokines increased the number of IgM secreting B cells but had no effects on the proliferation of IgM+ B cells in vitro. Taken as a whole, fish IL-4/13A may provide a basal level of type-2 immunity whilst IL-4/13B, when activated, provides an enhanced type-2 immunity, which may have an important role in specific cell-mediated immunity. To our knowledge this is the first in-depth analysis of the expression, modulation and bioactivities of type-2 cytokines in the same fish species, and in any early vertebrate. It contributes to a broader understanding of the evolution of type-2 immunity in vertebrates, and establishes a framework for further studies and manipulation of type-2 cytokines in fish.
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Affiliation(s)
- Tiehui Wang
- Scottish Fish Immunology Research Centre, School of Biological Sciences, University of Aberdeen, Aberdeen, UK
| | - Petronella Johansson
- Scottish Fish Immunology Research Centre, School of Biological Sciences, University of Aberdeen, Aberdeen, UK
| | - Beatriz Abós
- Centro de Investigación en Sanidad Animal (CISA-INIA), Valdeolmos (Madrid), Spain
| | - Amy Holt
- Scottish Fish Immunology Research Centre, School of Biological Sciences, University of Aberdeen, Aberdeen, UK
| | - Carolina Tafalla
- Centro de Investigación en Sanidad Animal (CISA-INIA), Valdeolmos (Madrid), Spain
| | - Youshen Jiang
- Scottish Fish Immunology Research Centre, School of Biological Sciences, University of Aberdeen, Aberdeen, UK.,College of Fishery and Life Science, Shanghai Ocean University, Shanghai, China
| | - Alex Wang
- Scottish Fish Immunology Research Centre, School of Biological Sciences, University of Aberdeen, Aberdeen, UK
| | - Qiaoqing Xu
- Scottish Fish Immunology Research Centre, School of Biological Sciences, University of Aberdeen, Aberdeen, UK.,School of Animal Science, Yangtze University, Jingzhou, Hubei Province, China
| | - Zhitao Qi
- Scottish Fish Immunology Research Centre, School of Biological Sciences, University of Aberdeen, Aberdeen, UK.,Central Laboratory of Biology, Chemical and Biological Engineering College, Yancheng Institute of Technology, Yancheng, Jiangsu Province, China
| | - Wenshu Huang
- Scottish Fish Immunology Research Centre, School of Biological Sciences, University of Aberdeen, Aberdeen, UK.,Fisheries College, Jimei University, Xiamen, Fujian Province, China
| | - Maria M Costa
- Scottish Fish Immunology Research Centre, School of Biological Sciences, University of Aberdeen, Aberdeen, UK.,Instituto de Investigaciones Marinas, Consejo Superior de Investigaciones Científicas (CSIC), Vigo, Spain
| | - Patricia Diaz-Rosales
- Scottish Fish Immunology Research Centre, School of Biological Sciences, University of Aberdeen, Aberdeen, UK
| | - Jason W Holland
- Scottish Fish Immunology Research Centre, School of Biological Sciences, University of Aberdeen, Aberdeen, UK
| | - Christopher J Secombes
- Scottish Fish Immunology Research Centre, School of Biological Sciences, University of Aberdeen, Aberdeen, UK
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Veenstra KA, Wang T, Alnabulsi A, Douglas A, Russell KS, Tubbs L, Arous JB, Secombes CJ. Analysis of adipose tissue immune gene expression after vaccination of rainbow trout with adjuvanted bacterins reveals an association with side effects. Mol Immunol 2017. [DOI: 10.1016/j.molimm.2017.05.026] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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42
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Secombes CJ, Zou J. Evolution of Interferons and Interferon Receptors. Front Immunol 2017; 8:209. [PMID: 28303139 PMCID: PMC5332411 DOI: 10.3389/fimmu.2017.00209] [Citation(s) in RCA: 130] [Impact Index Per Article: 18.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2016] [Accepted: 02/15/2017] [Indexed: 11/25/2022] Open
Abstract
The earliest jawed vertebrates (Gnathostomes) would likely have had interferon (IFN) genes, since they are present in extant cartilaginous fish (sharks and rays) and bony fish (lobe-finned and ray-finned fish, the latter consisting of the chondrostei, holostei, and teleostei), as well as in tetrapods. They are thought to have evolved from a class II helical cytokine ancestor, along with the interleukin (IL)-10 cytokine family. The two rounds of whole genome duplication (WGD) that occurred between invertebrates and vertebrates (1) may have given rise to additional loci, initially containing an IL-10 ancestor and IFN ancestor, which have duplicated further to give rise to the two loci containing the IL-10 family genes, and potentially the IFN type I and IFN type III loci (2). The timing of the divergence of the IFN type II gene from the IL-10 family genes is not clear but was also an early event in vertebrate evolution. Further WGD events at the base of the teleost fish, and in particular teleost lineages (cyprinids, salmonids), have duplicated the loci further, giving rise to additional IFN genes, with tandem gene duplication within a locus a common occurrence. Finally, retrotransposition events have occurred in different vertebrate lineages giving rise to further IFN loci, with large expansions of genes at these loci in some cases. This review will initially explore the likely IFN system present in the earliest Gnathostomes by comparison of the known cartilaginous fish genes with those present in mammals and will then explore the changes that have occurred in gene number/diversification, gene organization, and the encoded proteins during vertebrate evolution.
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Affiliation(s)
- Chris J Secombes
- Scottish Fish Immunology Research Centre, University of Aberdeen , Aberdeen , UK
| | - Jun Zou
- Scottish Fish Immunology Research Centre, University of Aberdeen , Aberdeen , UK
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43
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Benedicenti O, Wang T, Wangkahart E, Milne DJ, Holland JW, Collins C, Secombes CJ. Characterisation of arginase paralogues in salmonids and their modulation by immune stimulation/ infection. FISH & SHELLFISH IMMUNOLOGY 2017; 61:138-151. [PMID: 28025160 DOI: 10.1016/j.fsi.2016.12.024] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/08/2016] [Revised: 12/16/2016] [Accepted: 12/21/2016] [Indexed: 06/06/2023]
Abstract
In this study we show that four arginase isoforms (arg1a, arg1b, arg2a, arg2b) exist in rainbow trout (Oncorhynchus mykiss) and Atlantic salmon (Salmo salar). We have characterised these molecules in terms of a) sequence analysis, b) constitutive expression in different tissues, and modulated expression following c) stimulation of head kidney macrophages in vitro, or d) vaccination/infection with Yersinia ruckeri and e) parasite infection (AGD caused by Paramoeba perurans and PKD caused by Tetracapsuloides bryosalmonae). Synteny analysis suggested that these arginase genes are paralogues likely from the Ss4R duplication event, and amino acid identity/similarity analyses showed that the proteins are relatively well conserved across species. In rainbow trout constitutive expression of one or both paralogues was seen in most tissues but different constitutive expression patterns were observed for the different isoforms. Stimulation of rainbow trout head kidney macrophages with PAMPs and cytokines also revealed isoform specific responses and kinetics, with arg1a being particularly highly modulated by the PAMPs and pro-inflammatory cytokines. In contrast the type II arginase paralogues were induced by rIl-4/13, albeit to a lesser degree. Vaccination and infection with Y. ruckeri also revealed isoform specific responses, with variation in tissue expression level and kinetics. Lastly, the impact of parasite infection was studied, where down regulation of arg1a and arg1b was seen in two different models (AGD in salmon and PKD in trout) and of arg2a in AGD. The differential responses seen are discussed in the context of markers of type II responses in fish and paralogue subfunctionalization.
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Affiliation(s)
- Ottavia Benedicenti
- Scottish Fish Immunology Research Centre, Institute of Biological and Environmental Sciences, University of Aberdeen, Tillydrone Avenue, Aberdeen AB24 2TZ, UK; Marine Scotland Science Marine Laboratory, 375 Victoria Rd, Aberdeen AB11 9DB, UK.
| | - Tiehui Wang
- Scottish Fish Immunology Research Centre, Institute of Biological and Environmental Sciences, University of Aberdeen, Tillydrone Avenue, Aberdeen AB24 2TZ, UK
| | - Eakapol Wangkahart
- Scottish Fish Immunology Research Centre, Institute of Biological and Environmental Sciences, University of Aberdeen, Tillydrone Avenue, Aberdeen AB24 2TZ, UK
| | - Douglas J Milne
- Scottish Fish Immunology Research Centre, Institute of Biological and Environmental Sciences, University of Aberdeen, Tillydrone Avenue, Aberdeen AB24 2TZ, UK
| | - Jason W Holland
- Scottish Fish Immunology Research Centre, Institute of Biological and Environmental Sciences, University of Aberdeen, Tillydrone Avenue, Aberdeen AB24 2TZ, UK
| | - Catherine Collins
- Marine Scotland Science Marine Laboratory, 375 Victoria Rd, Aberdeen AB11 9DB, UK
| | - Christopher J Secombes
- Scottish Fish Immunology Research Centre, Institute of Biological and Environmental Sciences, University of Aberdeen, Tillydrone Avenue, Aberdeen AB24 2TZ, UK.
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Clark IA, Vissel B. The meteorology of cytokine storms, and the clinical usefulness of this knowledge. Semin Immunopathol 2017; 39:505-516. [PMID: 28451786 PMCID: PMC5495849 DOI: 10.1007/s00281-017-0628-y] [Citation(s) in RCA: 54] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2016] [Accepted: 04/10/2017] [Indexed: 01/07/2023]
Abstract
The term cytokine storm has become a popular descriptor of the dramatic harmful consequences of the rapid release of polypeptide mediators, or cytokines, that generate inflammatory responses. This occurs throughout the body in both non-infectious and infectious disease states, including the central nervous system. In infectious disease it has become a useful concept through which to appreciate that most infectious disease is not caused directly by a pathogen, but by an overexuberant innate immune response by the host to its presence. It is less widely known that in addition to these roles in disease pathogenesis these same cytokines are also the basis of innate immunity, and in lower concentrations have many essential physiological roles. Here we update this field, including what can be learned through the history of how these interlinking three aspects of biology and disease came to be appreciated. We argue that understanding cytokine storms in their various degrees of acuteness, severity and persistence is essential in order to grasp the pathophysiology of many diseases, and thus the basis of newer therapeutic approaches to treating them. This particularly applies to the neurodegenerative diseases.
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Affiliation(s)
- Ian A. Clark
- Research School of Biology, Australian National University, Canberra, Australia
| | - Bryce Vissel
- School of Life Sciences, Faculty of Science, University of Technology, Sydney, Australia ,Garvan Institute of Medical Research, Sydney, Australia
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45
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Álvarez CA, Gomez FA, Mercado L, Ramírez R, Marshall SH. Piscirickettsia salmonis Imbalances the Innate Immune Response to Succeed in a Productive Infection in a Salmonid Cell Line Model. PLoS One 2016; 11:e0163943. [PMID: 27723816 PMCID: PMC5056700 DOI: 10.1371/journal.pone.0163943] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2016] [Accepted: 09/16/2016] [Indexed: 11/18/2022] Open
Abstract
Piscirickettsia salmonis is a facultative intracellular bacterium that causes the disease called "salmon rickettsial syndrome". Attempts to control this disease have been unsuccessful, because existing vaccines have not achieved the expected effectiveness and the antibiotics used fail to completely eradicate the pathogen. This is in part the product of lack of scientific information that still lacks on the mechanisms used by this bacterium to overcome infected-cell responses and survive to induce a productive infection in macrophages. For that, this work was focused in determining if P. salmonis is able to modify the expression and the imbalance of IL-12 and IL-10 using an in vitro model. Additionally, we also evaluated the role the antimicrobial peptide hepcidin had in the control of this pathogen in infected cells. Therefore, the expression of IL-10 and IL-12 was evaluated at earlier stages of infection in the RTS11 cell line derived from Oncorhynchus mykiss macrophages. Simultaneously, the hepcidin expression and location was analyzed in the macrophages infected with the pathogen. Our results suggest that IL-10 is clearly induced at early stages of infection with values peaking at 36 hours post infection. Furthermore, infective P. salmonis downregulates the expression of antimicrobial peptide hepcidin and vesicles containing this peptide were unable to merge with the infective bacteria. Our results suggest that P. salmonis is able to manipulate the behavior of host cytokines and likely might constitute a virulence mechanism that promotes intracellular bacterial replication in leukocytes cells lines of trout and salmon. This mechanism involves the generation of an optimum environment for the microorganism and the downregulation of antimicrobial effectors like hepcidin.
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Affiliation(s)
- Claudio A. Álvarez
- Laboratorio de Genética e Inmunología Molecular, Instituto de Biología, Pontificia Universidad Católica de Valparaíso, Valparaíso, Chile
| | - Fernando A. Gomez
- Laboratorio de Genética e Inmunología Molecular, Instituto de Biología, Pontificia Universidad Católica de Valparaíso, Valparaíso, Chile
| | - Luis Mercado
- Laboratorio de Genética e Inmunología Molecular, Instituto de Biología, Pontificia Universidad Católica de Valparaíso, Valparaíso, Chile
- Fraunhofer Chile Research Foundation, Center for Systems Biotechnology, Las Condes, Santiago, Chile
| | - Ramón Ramírez
- Laboratorio de Genética e Inmunología Molecular, Instituto de Biología, Pontificia Universidad Católica de Valparaíso, Valparaíso, Chile
- Fraunhofer Chile Research Foundation, Center for Systems Biotechnology, Las Condes, Santiago, Chile
| | - Sergio H. Marshall
- Laboratorio de Genética e Inmunología Molecular, Instituto de Biología, Pontificia Universidad Católica de Valparaíso, Valparaíso, Chile
- Fraunhofer Chile Research Foundation, Center for Systems Biotechnology, Las Condes, Santiago, Chile
- * E-mail:
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46
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Secombes CJ. What's new in fish cytokine research? FISH & SHELLFISH IMMUNOLOGY 2016; 53:1-3. [PMID: 26994671 DOI: 10.1016/j.fsi.2016.03.035] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/05/2016] [Revised: 02/22/2016] [Accepted: 03/15/2016] [Indexed: 06/05/2023]
Affiliation(s)
- Chris J Secombes
- Scottish Fish Immunology Research Centre, University of Aberdeen, Zoology Building, Tillydrone Avenue, Aberdeen AB24 2TZ, Scotland, UK.
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47
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Zou J, Secombes CJ. The Function of Fish Cytokines. BIOLOGY 2016; 5:biology5020023. [PMID: 27231948 PMCID: PMC4929537 DOI: 10.3390/biology5020023] [Citation(s) in RCA: 292] [Impact Index Per Article: 36.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/29/2016] [Revised: 04/28/2016] [Accepted: 05/17/2016] [Indexed: 12/14/2022]
Abstract
What is known about the biological activity of fish cytokines is reviewed. Most of the functional studies performed to date have been in teleost fish, and have focused on the induced effects of cytokine recombinant proteins, or have used loss- and gain-of-function experiments in zebrafish. Such studies begin to tell us about the role of these molecules in the regulation of fish immune responses and whether they are similar or divergent to the well-characterised functions of mammalian cytokines. This knowledge will aid our ability to determine and modulate the pathways leading to protective immunity, to improve fish health in aquaculture.
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Affiliation(s)
- Jun Zou
- Scottish Fish Immunology Research Centre, University of Aberdeen, Zoology Building, Tillydrone Avenue, Aberdeen AB24 2TZ, UK.
| | - Christopher J Secombes
- Scottish Fish Immunology Research Centre, University of Aberdeen, Zoology Building, Tillydrone Avenue, Aberdeen AB24 2TZ, UK.
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Wangkahart E, Scott C, Secombes CJ, Wang T. Re-examination of the rainbow trout (Oncorhynchus mykiss) immune response to flagellin: Yersinia ruckeri flagellin is a potent activator of acute phase proteins, anti-microbial peptides and pro-inflammatory cytokines in vitro. DEVELOPMENTAL AND COMPARATIVE IMMUNOLOGY 2016; 57:75-87. [PMID: 26719024 DOI: 10.1016/j.dci.2015.12.017] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/15/2015] [Revised: 12/18/2015] [Accepted: 12/19/2015] [Indexed: 06/05/2023]
Abstract
Flagellin is the principal component of bacterial flagellum and a major target of the host immune system. To provide new insights into the role of flagellin in fish immune responses to flagellated microorganisms, a recombinant flagellin from Yersinia ruckeri (rYRF) was produced and its bioactivity investigated in the trout macrophage cell line RTS-11 and head kidney cells. rYRF is a potent activator of pro-inflammatory cytokines, acute phase proteins, antimicrobial peptides and subunits of the IL-12 cytokine family. This and the synergy seen with IFN-γ to enhance further expression of specific IL-12 and TNF-α isoforms may suggest that flagellin could be a useful immune stimulant or adjuvant for use in aquaculture. Gene paralogues were often differentially modulated, highlighting the need to study all of the paralogues of immune genes in fish to gain a full understanding of the effects of PAMPs or other stimulants, and the potential immune responses elicited.
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Affiliation(s)
- Eakapol Wangkahart
- Scottish Fish Immunology Research Centre, School of Biological Sciences, University of Aberdeen, Aberdeen, AB24 2TZ, UK; Division of Fisheries, Department of Agricultural Technology, Faculty of Technology, Mahasarakham University, Khamriang Sub-District, Kantarawichai, Mahasarakham, 44150, Thailand
| | - Callum Scott
- Scottish Fish Immunology Research Centre, School of Biological Sciences, University of Aberdeen, Aberdeen, AB24 2TZ, UK
| | - Christopher J Secombes
- Scottish Fish Immunology Research Centre, School of Biological Sciences, University of Aberdeen, Aberdeen, AB24 2TZ, UK.
| | - Tiehui Wang
- Scottish Fish Immunology Research Centre, School of Biological Sciences, University of Aberdeen, Aberdeen, AB24 2TZ, UK.
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Valenzuela B, Obreque J, Soto-Aguilera S, Maisey K, Imarai M, Modak B. Key cytokines of adaptive immunity are differentially induced in rainbow trout kidney by a group of structurally related geranyl aromatic derivatives. FISH & SHELLFISH IMMUNOLOGY 2016; 49:45-53. [PMID: 26690664 DOI: 10.1016/j.fsi.2015.12.008] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/29/2015] [Revised: 11/05/2015] [Accepted: 12/10/2015] [Indexed: 06/05/2023]
Abstract
Filifolinone is a semi-synthetic terpenoid derivative obtained from Heliotropium filifolium that increases the expression level of pro-inflammatory and anti-inflammatory cytokines in kidney cells of salmon. Because cytokines are produced in response to a foreign organism and by distinct other signals modulating immune responses, we further studied the potential immunomodulatory effects of a group of structural related terpenoid derivatives from H. filifolium on salmonids to determine the relationship between the chemical structure of the derivatives and their ability to modify cytokine expression and the lymphoid content. The resin and four 3H-spiro 1-benzofuran-2,1'-cyclohexane derivatives were tested in vivo in rainbow trout (Oncorhynchus mykiss) by quantifying the transcript levels of antiviral and T helper-type cytokines and T and B cells in the kidney. Three of the four terpenoids differ only in the C-7'substituent of the cyclohexane and the presence of the ketone group at this position in Filifolinone appeared responsible of an important up-regulation of IFN-α1, IFN-γ, IL-4/13A and IL-17D in the kidney of the treated trout. In addition, the absence of a methoxy group in carbon 7 of the benzene ring, found in all compounds but not in Folifolinoic acid, produced a significant reduction of IFN-γ, IL-12 and IL-4/13A transcripts. B cells were not affected by the compound treatment but Filifolinoic acid and the resin induced a significant reduction of T cells. Altogether, results showed that immunomodulating responses observed in the trout by effect of 3H-spiro 1-benzofuran-2,1'-cyclohexane derivatives is related to the presence of the ketone group in the carbon 7' and the methoxy group in carbon 7 of the benzene ring, being Filifolinone the most active immunostimulatory compound identified.
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Affiliation(s)
- Beatriz Valenzuela
- Laboratory of Immunology, Center of Aquatic Biotechnology, Department of Biology, Faculty of Chemistry and Biology, University of Santiago of Chile, Av. Bernardo O'Higgins, 3363 Santiago, Chile.
| | - Javiera Obreque
- Laboratory of Immunology, Center of Aquatic Biotechnology, Department of Biology, Faculty of Chemistry and Biology, University of Santiago of Chile, Av. Bernardo O'Higgins, 3363 Santiago, Chile.
| | - Sarita Soto-Aguilera
- Laboratory of Immunology, Center of Aquatic Biotechnology, Department of Biology, Faculty of Chemistry and Biology, University of Santiago of Chile, Av. Bernardo O'Higgins, 3363 Santiago, Chile.
| | - Kevin Maisey
- Laboratory of Immunology, Center of Aquatic Biotechnology, Department of Biology, Faculty of Chemistry and Biology, University of Santiago of Chile, Av. Bernardo O'Higgins, 3363 Santiago, Chile.
| | - Mónica Imarai
- Laboratory of Immunology, Center of Aquatic Biotechnology, Department of Biology, Faculty of Chemistry and Biology, University of Santiago of Chile, Av. Bernardo O'Higgins, 3363 Santiago, Chile.
| | - Brenda Modak
- Laboratory of Natural Product Chemistry, Center of Aquatic Biotechnology, Department of Environmental Sciences, Faculty of Chemistry and Biology, University of Santiago of Chile, Av. Bernardo O'Higgins, 3363 Santiago, Chile.
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Xu Q, Jiang Y, Wangkahart E, Zou J, Chang M, Yang D, Secombes CJ, Nie P, Wang T. Sequence and Expression Analysis of Interferon Regulatory Factor 10 (IRF10) in Three Diverse Teleost Fish Reveals Its Role in Antiviral Defense. PLoS One 2016; 11:e0147181. [PMID: 26783745 PMCID: PMC4718558 DOI: 10.1371/journal.pone.0147181] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2014] [Accepted: 12/30/2015] [Indexed: 11/18/2022] Open
Abstract
BACKGROUND Interferon regulatory factor (IRF) 10 was first found in birds and is present in the genome of other tetrapods (but not humans and mice), as well as in teleost fish. The functional role of IRF10 in vertebrate immunity is relatively unknown compared to IRF1-9. The target of this research was to clone and characterize the IRF10 genes in three economically important fish species that will facilitate future evaluation of this molecule in fish innate and adaptive immunity. MOLECULAR CHARACTERIZATION OF IRF10 IN THREE FISH SPECIES In the present study, a single IRF10 gene was cloned in grass carp Ctenopharyngodon idella and Asian swamp eel Monopterus albus, and two, named IRF10a and IRF10b, in rainbow trout Oncorhynchus mykiss. The fish IRF10 molecules share highest identities to other vertebrate IRF10s, and have a well conserved DNA binding domain, IRF-associated domain, and an 8 exon/7 intron structure with conserved intron phase. The presence of an upstream ATG or open reading frame (ORF) in the 5'-untranslated region of different fish IRF10 cDNA sequences suggests potential regulation at the translational level, and this has been verified by in vitro transcription/translation experiments of the trout IRF10a cDNA, but would still need to be validated in fish cells. EXPRESSION ANALYSIS OF IRF10 IN VIVO AND IN VITRO Both trout IRF10 paralogues are highly expressed in thymus, blood and spleen but are relatively low in head kidney and caudal kidney. Trout IRF10b expression is significantly higher than IRF10a in integumentary tissues i.e. gills, scales, skin, intestine, adipose fin and tail fins, suggesting that IRF10b may be more important in mucosal immunity. The expression of both trout IRF10 paralogues is up-regulated by recombinant IFN-γ. The expression of the IRF10 genes is highly induced by Poly I:C in vitro and in vivo, and by viral infection, but is less responsive to peptidoglycan and bacterial infection, suggesting an important role of fish IRF10 in antiviral defense.
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Affiliation(s)
- Qiaoqing Xu
- School of Animal Science, Yangtze University, Jingzhou, Hubei Province 434025, P. R. China
- Scottish Fish Immunology Research Centre, Institute of Biological and Environmental Sciences, University of Aberdeen, Aberdeen AB24 2TZ, United Kingdom
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, Hubei Province 430072, P. R. China
| | - Yousheng Jiang
- Scottish Fish Immunology Research Centre, Institute of Biological and Environmental Sciences, University of Aberdeen, Aberdeen AB24 2TZ, United Kingdom
- College of Fishery and Life Science, Shanghai Ocean University, Shanghai 201306, China
| | - Eakapol Wangkahart
- Scottish Fish Immunology Research Centre, Institute of Biological and Environmental Sciences, University of Aberdeen, Aberdeen AB24 2TZ, United Kingdom
| | - Jun Zou
- Scottish Fish Immunology Research Centre, Institute of Biological and Environmental Sciences, University of Aberdeen, Aberdeen AB24 2TZ, United Kingdom
| | - Mingxian Chang
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, Hubei Province 430072, P. R. China
| | - Daiqin Yang
- School of Animal Science, Yangtze University, Jingzhou, Hubei Province 434025, P. R. China
| | - Chris J. Secombes
- Scottish Fish Immunology Research Centre, Institute of Biological and Environmental Sciences, University of Aberdeen, Aberdeen AB24 2TZ, United Kingdom
| | - Pin Nie
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, Hubei Province 430072, P. R. China
- * E-mail: (TW); (PN)
| | - Tiehui Wang
- Scottish Fish Immunology Research Centre, Institute of Biological and Environmental Sciences, University of Aberdeen, Aberdeen AB24 2TZ, United Kingdom
- * E-mail: (TW); (PN)
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