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Ruiz VL, Robert J. The amphibian immune system. Philos Trans R Soc Lond B Biol Sci 2023; 378:20220123. [PMID: 37305914 PMCID: PMC10258673 DOI: 10.1098/rstb.2022.0123] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2023] [Accepted: 04/16/2023] [Indexed: 06/13/2023] Open
Abstract
Amphibians are at the forefront of bridging the evolutionary gap between mammals and more ancient, jawed vertebrates. Currently, several diseases have targeted amphibians and understanding their immune system has importance beyond their use as a research model. The immune system of the African clawed frog, Xenopus laevis, and that of mammals is well conserved. We know that several features of the adaptive and innate immune system are very similar for both, including the existence of B cells, T cells and innate-like T cells. In particular, the study of the immune system at early stages of development is benefitted by studying X. laevis tadpoles. The tadpoles mainly rely on innate immune mechanisms including pre-set or innate-like T cells until after metamorphosis. In this review we lay out what is known about the innate and adaptive immune system of X. laevis including the lymphoid organs as well as how other amphibian immune systems are similar or different. Furthermore, we will describe how the amphibian immune system responds to some viral, bacterial and fungal insults. This article is part of the theme issue 'Amphibian immunity: stress, disease and ecoimmunology'.
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Affiliation(s)
- Vania Lopez Ruiz
- Department of Microbiology and Immunology, University of Rochester Medical Center, Rochester, NY 14642, USA
| | - Jacques Robert
- Department of Microbiology and Immunology, University of Rochester Medical Center, Rochester, NY 14642, USA
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Liu Y, Jiang N, Liu W, Zhou Y, Xue M, Zhong Q, Li Z, Fan Y. Rag1 and Rag2 Gene Expressions Identify Lymphopoietic Tissues in Larvae of Rice-Field Eel (Monopterus albus). Int J Mol Sci 2022; 23:ijms23147546. [PMID: 35886885 PMCID: PMC9324350 DOI: 10.3390/ijms23147546] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2022] [Revised: 06/30/2022] [Accepted: 07/05/2022] [Indexed: 12/10/2022] Open
Abstract
In immature lymphocytes, recombination activating genes 1 and 2 are necessary for antigen receptor V (D) J recombination, representing immature lymphocyte biomarkers. Herein, we cloned and sequenced rice-field eel rag1 and rag2 genes. Their expressions in the thymus, liver, and kidney were significant from 0 days post hatching (dph) to 45 dph, peaking at 45 dph in these three tissues. In situ hybridization detected high rag1 and rag2 expressions in the liver, kidney, and thymus of rice-field eel from 2 to 45 dph, suggesting that multiple tissues of rice-field eel contain lymphocyte lineage cells and undergo lymphopoiesis. Tissue morphology was used to observe lymphopoiesis development in these three tissues. The thymus primordium began to develop at 2 dph, while the kidney and liver have generated. Our findings verified that the thymus is the primary lymphopoietic tissue and suggested that, in rice-field eel, lymphocyte differentiation also occurs in the liver and kidney.
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Affiliation(s)
- Yuchen Liu
- Yangtze River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Wuhan 430223, China; (Y.L.); (N.J.); (W.L.); (Y.Z.); (M.X.)
- National Demonstration Center for Experimental Fisheries Science Education, Shanghai Ocean University, Shanghai 201306, China
| | - Nan Jiang
- Yangtze River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Wuhan 430223, China; (Y.L.); (N.J.); (W.L.); (Y.Z.); (M.X.)
| | - Wenzhi Liu
- Yangtze River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Wuhan 430223, China; (Y.L.); (N.J.); (W.L.); (Y.Z.); (M.X.)
| | - Yong Zhou
- Yangtze River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Wuhan 430223, China; (Y.L.); (N.J.); (W.L.); (Y.Z.); (M.X.)
| | - Mingyang Xue
- Yangtze River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Wuhan 430223, China; (Y.L.); (N.J.); (W.L.); (Y.Z.); (M.X.)
| | - Qiwang Zhong
- College of Biological Science and Engineering, Jiangxi Agricultural University, Nanchang 330045, China;
| | - Zhong Li
- Yangtze River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Wuhan 430223, China; (Y.L.); (N.J.); (W.L.); (Y.Z.); (M.X.)
- Correspondence: (Z.L.); (Y.F.)
| | - Yuding Fan
- Yangtze River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Wuhan 430223, China; (Y.L.); (N.J.); (W.L.); (Y.Z.); (M.X.)
- National Demonstration Center for Experimental Fisheries Science Education, Shanghai Ocean University, Shanghai 201306, China
- College of Biological Science and Engineering, Jiangxi Agricultural University, Nanchang 330045, China;
- Correspondence: (Z.L.); (Y.F.)
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Jiang N, Fan Y, Zhou Y, Meng Y, Liu W, Li Y, Xue M, Robert J, Zeng L. The Immune System and the Antiviral Responses in Chinese Giant Salamander, Andrias davidianus. Front Immunol 2021; 12:718627. [PMID: 34675918 PMCID: PMC8524050 DOI: 10.3389/fimmu.2021.718627] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2021] [Accepted: 09/16/2021] [Indexed: 12/25/2022] Open
Abstract
The Chinese giant salamander, belonging to an ancient amphibian lineage, is the largest amphibian existing in the world, and is also an important animal for artificial cultivation in China. However, some aspects of the innate and adaptive immune system of the Chinese giant salamander are still unknown. The Chinese giant salamander iridovirus (GSIV), a member of the Ranavirus genus (family Iridoviridae), is a prominent pathogen causing high mortality and severe economic losses in Chinese giant salamander aquaculture. As a serious threat to amphibians worldwide, the etiology of ranaviruses has been mainly studied in model organisms, such as the Ambystoma tigrinum and Xenopus. Nevertheless, the immunity to ranavirus in Chinese giant salamander is distinct from other amphibians and less known. We review the unique immune system and antiviral responses of the Chinese giant salamander, in order to establish effective management of virus disease in Chinese giant salamander artificial cultivation.
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Affiliation(s)
- Nan Jiang
- Division of Fish Disease, Yangtze River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Wuhan, China
- Department of Microbiology and Immunology, University of Rochester Medical Center, New York, NY, United States
| | - Yuding Fan
- Division of Fish Disease, Yangtze River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Wuhan, China
| | - Yong Zhou
- Division of Fish Disease, Yangtze River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Wuhan, China
| | - Yan Meng
- Division of Fish Disease, Yangtze River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Wuhan, China
| | - Wenzhi Liu
- Division of Fish Disease, Yangtze River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Wuhan, China
| | - Yiqun Li
- Division of Fish Disease, Yangtze River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Wuhan, China
| | - Mingyang Xue
- Division of Fish Disease, Yangtze River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Wuhan, China
| | - Jacques Robert
- Department of Microbiology and Immunology, University of Rochester Medical Center, New York, NY, United States
| | - Lingbing Zeng
- Division of Fish Disease, Yangtze River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Wuhan, China
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Jiang N, Ni Q, Fan Y, Wu S, Zhou Y, Liu W, Si K, Zhang H, Robert J, Zeng L. Characterization and expression of macrophage migration inhibitory factor (mif) in Chinese sturgeon (Acipenser sinensis). FISH & SHELLFISH IMMUNOLOGY 2020; 103:9-16. [PMID: 32344024 DOI: 10.1016/j.fsi.2020.04.055] [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: 03/09/2020] [Revised: 04/21/2020] [Accepted: 04/23/2020] [Indexed: 06/11/2023]
Abstract
The Chinese sturgeon (Acipenser sinensis) is one of the critically endangered aquatic species in China. It is also among the oldest extant actinopterygian fish species. To advance the characterization of the Chinese sturgeon immune system, we identified the gene encoding the macrophage migration inhibitory factor (MIF), a multifunctional cytokine that contributes to both innate and adaptive immune responses. Molecular and phylogenic analysis indicates the Chinese sturgeon (cs) MIF share a high degree of structural conservation with other MIF sequences and is closely related to other bony fish MIF. At steady state, cs-mif gene is expressed at relatively high levels in the brain, and to a lesser but significant level in liver, spleen, kidney, gut and skin. The spatial expression patterns determined by in situ hybridization indicates a preferential distribution of cs-mif transcripts in the cerebral cortex, the gut epithelium, hematopoietic tissues of kidney, spleen and liver parenchyma, and skin epidermis. Marked increase of cs-mif gene expression was induced by lipopolysaccharide (LPS) stimulation and Aeromonas hydrophila infection in all tested tissues. Furthermore, higher cs-mif transcript levels were detected in the liver, spleen, kidney, gut and skin during stress response resulting from hyperthermia. These results are not only consistent with the expected role of cs-mif gene in innate immunity but also suggest a potential role of this gene in stress response to hyperthermia in the Chinese sturgeon.
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Affiliation(s)
- Nan Jiang
- Yangtze River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Wuhan, Hubei, 430223, PR China; Department of Microbiology and Immunology, University of Rochester Medical Center, New York, 14642, USA
| | - Qi Ni
- Fishery Machinery and Instrument Research Institute, Chinese Academy of Fishery Sciences, Shanghai, 200092, PR China
| | - Yuding Fan
- Yangtze River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Wuhan, Hubei, 430223, PR China
| | - Shuwang Wu
- Yangtze River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Wuhan, Hubei, 430223, PR China
| | - Yong Zhou
- Yangtze River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Wuhan, Hubei, 430223, PR China
| | - Wenzhi Liu
- Yangtze River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Wuhan, Hubei, 430223, PR China
| | - Kaige Si
- Yangtze River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Wuhan, Hubei, 430223, PR China
| | - Haigeng Zhang
- Fishery Machinery and Instrument Research Institute, Chinese Academy of Fishery Sciences, Shanghai, 200092, PR China
| | - Jacques Robert
- Department of Microbiology and Immunology, University of Rochester Medical Center, New York, 14642, USA.
| | - Lingbing Zeng
- Yangtze River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Wuhan, Hubei, 430223, PR China.
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Sushila N, Das BK, Mir IN, Rout AK, Pani Prasad K, Tripathi G. Cloning, characterization and ontogenetic expression profile of RAG-2 and IgM in angelfish (Pterophyllum scalare). Gene 2020; 739:144496. [PMID: 32088242 DOI: 10.1016/j.gene.2020.144496] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2019] [Revised: 01/30/2020] [Accepted: 02/19/2020] [Indexed: 10/25/2022]
Abstract
Early larval developmental stages of fish are highly susceptible to opportunistic pathogens until the complete maturation of the lymphoid organs. Knowledge of the expression pattern of important markers of adaptive immune system during the ontogenetic development is essential before vaccinating the fish. In the present study, Pterophyllum scalare (angelfish) was taken to explore the relative expression profile of developmental markers of adaptive immunity, recombination activating gene-2 (RAG-2) and immunoglobulin M (IgM). The fishes were bred and early developmental stages (0-45 days post-hatched) were used to assess the expression profile. The genes, RAG-2 and IgM were cloned and sequenced with the base pair lengths of 1958 bp and 225 bp respectively. The mRNA expression of RAG-2 appeared at insignificant level at the first day of hatching, but the expression was significantly increased from 24 dph (days post-hatching) onwards and reached its peak at 27 dph. The results proved that the maturation of lymphoid organs was completed at 27 dph as the respective protein is involved in the V(D)J recombination, important for the maturation of lymphoid organs. A similar trend was also observed in the mRNA transcript levels of IgM gene and a significantly high expression was detected from 27 dph onwards. The present study suggested that the suitable time for vaccination in P. scalare could be taken at 27 dph, as the maturation and development of lymphoid organs is completed thus helps in stimulating the adaptive response of immunity against any pathogen.
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Affiliation(s)
- Ngairangbam Sushila
- Division of Aquatic Environment and Health Management, ICAR-Central Institute of Fisheries Education, Mumbai 400061, India
| | - Basanta Kumar Das
- ICAR-Central Inland Fisheries Research Institute, Barrackpore 700120, West Bengal, India
| | - Ishfaq Nazir Mir
- Directorate of Incubation and Vocational Training in Aquaculture (DIVA), Tamil Nadu Dr. J. Jayalalithaa Fisheries University, ECR Muttukadu, Chennai 603112, India
| | - Ajaya Kumar Rout
- ICAR-Central Inland Fisheries Research Institute, Barrackpore 700120, West Bengal, India
| | - K Pani Prasad
- Division of Aquatic Environment and Health Management, ICAR-Central Institute of Fisheries Education, Mumbai 400061, India
| | - Gayatri Tripathi
- Division of Aquatic Environment and Health Management, ICAR-Central Institute of Fisheries Education, Mumbai 400061, India.
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Li Y, Jiang N, Fan Y, Zhou Y, Liu W, Xue M, Meng Y, Zeng L. Chinese Giant Salamander ( Andrias davidianus) Iridovirus Infection Leads to Apoptotic Cell Death through Mitochondrial Damage, Caspases Activation, and Expression of Apoptotic-Related Genes. Int J Mol Sci 2019; 20:ijms20246149. [PMID: 31817556 PMCID: PMC6940751 DOI: 10.3390/ijms20246149] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2019] [Revised: 12/02/2019] [Accepted: 12/03/2019] [Indexed: 12/26/2022] Open
Abstract
Chinese giant salamander iridovirus (GSIV) is the causative pathogen of Chinese giant salamander (Andrias davidianus) iridovirosis, leading to severe infectious disease and huge economic losses. However, the infection mechanism by GSIV is far from clear. In this study, a Chinese giant salamander muscle (GSM) cell line is used to investigate the mechanism of cell death during GSIV infection. Microscopy observation and DNA ladder analysis revealed that DNA fragmentation happens during GSIV infection. Flow cytometry analysis showed that apoptotic cells in GSIV-infected cells were significantly higher than that in control cells. Caspase 8, 9, and 3 were activated in GSIV-infected cells compared with the uninfected cells. Consistently, mitochondria membrane potential (MMP) was significantly reduced, and cytochrome c was released into cytosol during GSIV infection. p53 expression increased at an early stage of GSIV infection and then slightly decreased late in infection. Furthermore, mRNA expression levels of pro-apoptotic genes participating in the extrinsic and intrinsic pathway were significantly up-regulated during GSIV infection, while those of anti-apoptotic genes were restrained in early infection and then rose in late infection. These results collectively indicate that GSIV induces GSM apoptotic cell death involving mitochondrial damage, caspases activation, p53 expression, and pro-apoptotic molecules up-regulation.
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Dawar FU, Babu V S, Kou H, Qin Z, Wan Q, Zhao L, Khan Khattack MN, Li J, Mei J, Lin L. The RAG2 gene of yellow catfish (Tachysurus fulvidraco) and its immune response against Edwardsiella ictaluri infection. DEVELOPMENTAL AND COMPARATIVE IMMUNOLOGY 2019; 98:65-75. [PMID: 31002844 DOI: 10.1016/j.dci.2019.04.006] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/10/2019] [Revised: 04/15/2019] [Accepted: 04/15/2019] [Indexed: 06/09/2023]
Abstract
Recombination-activating gene 2 (rag 2) allies with recombination-activating gene 1 (rag 1) and regulates the V(D)J recombination of immunoglobulin (Ig) and T-cell receptor (TCR) genes. Being a key player in the adaptive immune response of vertebrates, functional characterization of rag 2 from yellow catfish is beneficial for understanding the biological response towards the pathogens. In this report, we have cloned and characterized the rag 2 gene of yellow catfish, and a particular pattern of expression was analysed in the major tissues of yellow catfish. The results showed that the open reading frame (ORF) of yellow catfish rag 2 was 1596 bp in length, which encodes a peptide of 531 amino acids. The multiple sequence alignment and phylogenetic analysis of rag 2 of yellow catfish with other species showed the conserved regions and the classical taxonomic evolution among the different vertebrate species. The qRT-PCR and Western blot results revealed that rag 2 transcripts and proteins were present in various tissues of yellow catfish with relatively high expression in the tissues of the thymus, head-kidney, and spleen. The systematic distribution analysis of the rag 2 expression by immunohistochemistry (IHC) using the rabbit polyclonal antibody, exposed relatively high expression in head kidney, spleen and thymus tissues after infected with Edwardsiella ictaluri. Moreover, the temporal expression of rag 2 and pro-inflammatory cytokines (IL-1β and TNF-α) were significantly upregulated at different time points in the specific lymphoid tissues of yellow catfish following E. ictaluri infection. Our findings suggest that rag 2 potentially exhibited the immunological response in primary lymphoid tissues of yellow catfish against bacterial infection. This study will provide an essential source about rag 2 gene and its relationship with the inflammatory cytokines during infection.
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Affiliation(s)
- Farman Ullah Dawar
- College of Fisheries, Huazhong Agricultural University Wuhan, Hubei, 430070, China; Department of Zoology, Kohat University of Science and Technology (KUST) Kohat, 26000, Khyber Pakhtunkhwa, Pakistan
| | - Sarath Babu V
- Guangzhou Key Laboratory of Aquatic Animal Diseases and Waterfowl Breeding, College of Animal Sciences and Technology, Zhongkai University of Agriculture and Engineering, Guangzhou, Guangdong, 510225, China
| | - Hongyan Kou
- Guangzhou Key Laboratory of Aquatic Animal Diseases and Waterfowl Breeding, College of Animal Sciences and Technology, Zhongkai University of Agriculture and Engineering, Guangzhou, Guangdong, 510225, China
| | - Zhendong Qin
- Guangzhou Key Laboratory of Aquatic Animal Diseases and Waterfowl Breeding, College of Animal Sciences and Technology, Zhongkai University of Agriculture and Engineering, Guangzhou, Guangdong, 510225, China
| | - Quanyuan Wan
- Guangzhou Key Laboratory of Aquatic Animal Diseases and Waterfowl Breeding, College of Animal Sciences and Technology, Zhongkai University of Agriculture and Engineering, Guangzhou, Guangdong, 510225, China
| | - Lijuan Zhao
- Guangzhou Key Laboratory of Aquatic Animal Diseases and Waterfowl Breeding, College of Animal Sciences and Technology, Zhongkai University of Agriculture and Engineering, Guangzhou, Guangdong, 510225, China
| | | | - Jun Li
- Department of Zoology, Kohat University of Science and Technology (KUST) Kohat, 26000, Khyber Pakhtunkhwa, Pakistan; School of Biological Sciences, Lake Superior State University, Sault Ste. Marie, MI, 49783, USA
| | - Jie Mei
- College of Fisheries, Huazhong Agricultural University Wuhan, Hubei, 430070, China.
| | - Li Lin
- Guangzhou Key Laboratory of Aquatic Animal Diseases and Waterfowl Breeding, College of Animal Sciences and Technology, Zhongkai University of Agriculture and Engineering, Guangzhou, Guangdong, 510225, China.
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