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Ding Y, Zhang Y, Shen Y, Zhang Y, Li Z, Shi Y, Cui Z, Chen X. Aggregation and proliferation of B cells and T cells in MALTs upon Cryptocaryon irritans infection in large yellow croaker Larimichthys crocea. FISH & SHELLFISH IMMUNOLOGY 2024; 149:109535. [PMID: 38582231 DOI: 10.1016/j.fsi.2024.109535] [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: 01/22/2024] [Revised: 03/29/2024] [Accepted: 04/02/2024] [Indexed: 04/08/2024]
Abstract
Mucosal immunity in mucosa-associated lymphoid tissues (MALTs) plays crucial roles in resisting infection by pathogens, including parasites, bacteria and viruses. However, the mucosal immune response in the MALTs of large yellow croaker (Larimichthys crocea) upon parasitic infection remains largely unknown. In this study, we investigated the role of B cells and T cells in the MALTs of large yellow croaker following Cryptocaryon irritans infection. Upon C. irritans infection, the total IgM and IgT antibody levels were significantly increased in the skin mucus and gill mucus. Notably, parasite-specific IgM antibody level was increased in the serum, skin and gill mucus following parasitic infection, while the level of parasite-specific IgT antibody was exclusively increased in MALTs. Moreover, parasitic infection induced both local and systemic aggregation and proliferation of IgM+ B cells, suggesting that the increased levels of IgM in mucus may be derived from both systemic and mucosal immune tissues. In addition, we observed significant aggregation and proliferation of T cells in the gill, head kidney and spleen, suggesting that T cells may also be involved in the systemic and mucosal immune responses upon parasitic infection. Overall, our findings provided further insights into the role of immunoglobulins against pathogenic infection, and the simultaneous aggregation and proliferation of both B cells and T cells at mucosal surfaces suggested potential interactions between these two major lymphocyte populations during parasitic infection.
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Affiliation(s)
- Yangyang Ding
- State Key Laboratory of Mariculture Breeding, Key Laboratory of Marine Biotechnology of Fujian Province, College of Marine Sciences, College of Life Sciences, Fujian Agriculture and Forestry University, Fuzhou, 350002, China
| | - Yameng Zhang
- State Key Laboratory of Mariculture Breeding, Key Laboratory of Marine Biotechnology of Fujian Province, College of Marine Sciences, College of Life Sciences, Fujian Agriculture and Forestry University, Fuzhou, 350002, China
| | - Yibo Shen
- State Key Laboratory of Mariculture Breeding, Key Laboratory of Marine Biotechnology of Fujian Province, College of Marine Sciences, College of Life Sciences, Fujian Agriculture and Forestry University, Fuzhou, 350002, China
| | - Yihan Zhang
- State Key Laboratory of Mariculture Breeding, Key Laboratory of Marine Biotechnology of Fujian Province, College of Marine Sciences, College of Life Sciences, Fujian Agriculture and Forestry University, Fuzhou, 350002, China
| | - Zhangqi Li
- State Key Laboratory of Mariculture Breeding, Key Laboratory of Marine Biotechnology of Fujian Province, College of Marine Sciences, College of Life Sciences, Fujian Agriculture and Forestry University, Fuzhou, 350002, China
| | - Yuan Shi
- State Key Laboratory of Mariculture Breeding, Key Laboratory of Marine Biotechnology of Fujian Province, College of Marine Sciences, College of Life Sciences, Fujian Agriculture and Forestry University, Fuzhou, 350002, China.
| | - Zhengwei Cui
- State Key Laboratory of Mariculture Breeding, Key Laboratory of Marine Biotechnology of Fujian Province, College of Marine Sciences, College of Life Sciences, Fujian Agriculture and Forestry University, Fuzhou, 350002, China.
| | - Xinhua Chen
- State Key Laboratory of Mariculture Breeding, Key Laboratory of Marine Biotechnology of Fujian Province, College of Marine Sciences, College of Life Sciences, Fujian Agriculture and Forestry University, Fuzhou, 350002, China; Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Zhuhai, 519000, China; Fuzhou Institute of Oceanography, Fuzhou, 350108, China.
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Jiang S, Huang X, Li T, Zhang Y, Zhang J. Immune response of large yellow croaker Larimichthys crocea towards a recombinant vaccine candidate targeting the parasitic ciliate Cryptocaryon irritans. AQUACULTURE INTERNATIONAL : JOURNAL OF THE EUROPEAN AQUACULTURE SOCIETY 2023:1-20. [PMID: 37361880 PMCID: PMC10169208 DOI: 10.1007/s10499-023-01131-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/02/2023] [Accepted: 05/02/2023] [Indexed: 06/28/2023]
Abstract
Cryptocaryon irritans, a parasitic ciliate, pose a major threat to marine teleost fish aquaculture. So far, no effective and safe control method is available. In this study, the protective efficacy of a recombinant truncated surface antigen of C. irritans (rCiSA32.6t) for large yellow croaker (Larimichthys crocea) against the parasite challenge with a sub-lethal dose of the infective theronts was evaluated by comparing the relative percent survivals (RPS), the specific antibody titers in sera, and the expression levels of the immune-related genes among the negative or adjuvant control fish, fish intraperitoneally immunized with rCiSA32.6t. The results showed that a RPS of 50.1% in rCiSA32.6t-immunized fish was achieved in comparison to negative control fish against C. irritans. A significant increase was noted in the antigen-specific immunoglobulin M (IgM) and immunoglobulin T (IgT) antibody levels in the sera of the rCiSA32.6t-vaccinated fish. Compared to the negative control fish, quantitative real-time PCR analysis indicated that the interleukin-1beta, IgT, and IgM heavy chain mRNA level in the fish head kidney, spleen, gill, and skin tissue were upregulated post-rCiSA32.6t immunization. This study indicates that the rCiSA32.6t can provide a high level of immune protection against C. irritans infection in grouper and is therefore pursued as a candidate C. irritans vaccine.
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Affiliation(s)
- Shuiqing Jiang
- Fujian Key Laboratory of Developmental and Neural Biology, College of Life Science, Fujian Normal University, Qishan Campus, Fuzhou, 350117 Fujian China
- Guangdong Medical Valley, Nanjiang 2Nd Road, Zhujiang Street, Nansha District, Guangzhou, 511466 Guangdong China
| | - Xiaohong Huang
- Fujian Key Laboratory of Developmental and Neural Biology, College of Life Science, Fujian Normal University, Qishan Campus, Fuzhou, 350117 Fujian China
| | - Ting Li
- Fujian Key Laboratory of Developmental and Neural Biology, College of Life Science, Fujian Normal University, Qishan Campus, Fuzhou, 350117 Fujian China
| | - Yinan Zhang
- Fujian Key Laboratory of Developmental and Neural Biology, College of Life Science, Fujian Normal University, Qishan Campus, Fuzhou, 350117 Fujian China
| | - Jingwei Zhang
- Fujian Key Laboratory of Developmental and Neural Biology, College of Life Science, Fujian Normal University, Qishan Campus, Fuzhou, 350117 Fujian China
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Jiang S, Huang X. Host responses against the fish parasitizing ciliate Cryptocaryon irritans. Parasite Immunol 2023; 45:e12967. [PMID: 36606416 DOI: 10.1111/pim.12967] [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: 09/22/2022] [Revised: 12/05/2022] [Accepted: 01/02/2023] [Indexed: 01/07/2023]
Abstract
The parasitic ciliate Cryptocaryon irritans, which infects almost all marine fish species occurring in both tropical and subtropical regions throughout the world. The disease, cryptocaryonosis, accounts for significant economic losses to the aquaculture industry. This review attempts to provide a comprehensive overview of the biology of the parasite, host-parasite interactions and both specific and non-specific host defense mechanisms are responsible for the protection of fish against challenge infections with this ciliate. Also, this article reflects the current interest in this subject area and the quest to develop an available vaccine against the disease. Due to the high frequency of clinical fish cryptocaryonosis, the study of fish immune responses to C. irritans provides an optimal experimental model for understanding immunity against extracellular protozoa.
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Affiliation(s)
- Shuiqing Jiang
- Fujian Key Laboratory of Developmental and Neural Biology, College of Life Science, Fujian Normal University, Fuzhou, Fujian, China
| | - Xiaohong Huang
- Fujian Key Laboratory of Developmental and Neural Biology, College of Life Science, Fujian Normal University, Fuzhou, Fujian, China
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Chan J, Carmen LCP, Lee SQ, Prabakaran M. Identification and characterization of immunoglobulin tau (IgT) in Asian Seabass ( Lates calcarifer) and mucosal immune response to nervous necrosis virus. Front Immunol 2023; 14:1146387. [PMID: 36891305 PMCID: PMC9986254 DOI: 10.3389/fimmu.2023.1146387] [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: 01/17/2023] [Accepted: 02/06/2023] [Indexed: 02/22/2023] Open
Abstract
Mucosal immunity plays a critical role in the protection of teleost fish against infection, but mucosal immunoglobulin of important aquaculture species unique to Southeast Asia remained greatly understudied. In this study, the sequence of immunoglobulin T (IgT) from Asian sea bass (ASB) is described for the first time. IgT of ASB possesses the characteristic structure of immunoglobulin with a variable heavy chain and four CH4 domains. The CH2-CH4 domains and full-length IgT were expressed and CH2-CH4 specific antibody was validated against full-length IgT expressed in Sf9 III cells. Subsequent use of the anti-CH2-CH4 antibody in immunofluorescence staining confirmed the presence of IgT-positive cells in the ASB gill and intestine. The constitutive expression of ASB IgT was characterized in different tissues and in response to red-spotted grouper nervous necrosis virus (RGNNV) infection. The highest basal expression of secretory IgT (sIgT) was observed in the mucosal and lymphoid tissues such as the gills, intestine and head kidney. Following NNV infection, IgT expression was upregulated in the head kidney and mucosal tissues. Moreover, a significant increase in localized IgT was found in gills and intestines of infected fish on day 14 post-infection. Interestingly, a significant increase in NNV-specific IgT secretion was only observed in the gills of the infected group. Our results suggest that ASB IgT may play an important role in the adaptive mucosal immune responses against viral infection and could potentially be adapted as a tool for the evaluation of prospective mucosal vaccines and adjuvants for the species.
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Affiliation(s)
- Janlin Chan
- Temasek Life Sciences Laboratory, 1 Research Link, National University of Singapore, Singapore, Singapore
| | - Lee Ching Pei Carmen
- Temasek Life Sciences Laboratory, 1 Research Link, National University of Singapore, Singapore, Singapore
| | - Si Qi Lee
- Temasek Life Sciences Laboratory, 1 Research Link, National University of Singapore, Singapore, Singapore
| | - Mookkan Prabakaran
- Temasek Life Sciences Laboratory, 1 Research Link, National University of Singapore, Singapore, Singapore
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