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Velázquez J, Cruz L, Pérez-Bernal M, Valdivia O, Haidar A, Rodríguez A, Herrera F, González O, Morales A, Ulloa L, Blanco R, Pérez J, Dorta D, Luna Y, Garay HE, Abreu DD, Ramos Y, Besada V, Cabrera Y, Estrada MP, Carpio Y. Monoclonal antibody generated against Nile tilapia ( Oreochromis niloticus) IgT heavy chain using a peptide-based strategy. FISH AND SHELLFISH IMMUNOLOGY REPORTS 2023; 4:100093. [PMID: 37122444 PMCID: PMC10130216 DOI: 10.1016/j.fsirep.2023.100093] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2022] [Revised: 04/12/2023] [Accepted: 04/13/2023] [Indexed: 05/02/2023] Open
Abstract
Teleost IgT/Z plays a principal role in the defense mechanisms against infectious agents in the mucosal compartments and in systemic immunity. Previously, Nile tilapia (Oreochromis niloticus) IgT was discovered and characterized at transcription level. In this work, we generated a monoclonal antibody (mAb) that specifically recognized the Nile tilapia IgT. BALB/c mice were immunized with three synthetic peptides conjugated to KLH. The sequences of these peptides derived from the constant region of the Nile tilapia IgT heavy chain. ELISA and Western blotting confirmed the specificity of the polyclonal sera and the culture supernatant from a positive hybridoma clone. We observed immunoreactivity against a recombinant IgT fragment and native IgT in skin mucus. The anti-IgT mAb did not cross-react with purified tilapia IgM. Direct ELISA analysis allowed the quantification of skin mucus IgM and IgT concentrations. Flow cytometry analysis revealed differences in the percentage of IgT+ B cell populations between juveniles and adults in peripheral blood, head kidney and spleen lymphocytes and among the tissues analyzed. For further validation of the anti-IgT mAb utility, a recombinant vaccine candidate against sea lice (TT-P0 Ls) was injected into juvenile tilapia. Direct ELISA results revealed a differential secretion of skin mucus IgT and IgM after immunostimulation. In addition, the percentages of IgT+ B cells were determined at 7 days after booster and ex-vivo stimulation by flow cytometry. This mAb constitutes an important immunological tool to study the biological function and structural characteristics of tilapia IgT.
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Affiliation(s)
- Janet Velázquez
- Animal Biotechnology Department, Center for Genetic Engineering and Biotechnology (CIGB), P.O. Box 6162, Havana 10600, Cuba
| | - Lynn Cruz
- Animal Biotechnology Department, Center for Genetic Engineering and Biotechnology (CIGB), P.O. Box 6162, Havana 10600, Cuba
| | - Maylin Pérez-Bernal
- Research and Development Department, Center for Genetic Engineering and Biotechnology (CIGB), P.O. Box 83, Sancti Spíritus 60200, Cuba
| | - Onel Valdivia
- Research and Development Department, Center for Genetic Engineering and Biotechnology (CIGB), P.O. Box 83, Sancti Spíritus 60200, Cuba
| | - Arlette Haidar
- Animal Biotechnology Department, Center for Genetic Engineering and Biotechnology (CIGB), P.O. Box 6162, Havana 10600, Cuba
| | - Alianet Rodríguez
- Animal Biotechnology Department, Center for Genetic Engineering and Biotechnology (CIGB), P.O. Box 6162, Havana 10600, Cuba
| | - Fidel Herrera
- Animal Biotechnology Department, Center for Genetic Engineering and Biotechnology (CIGB), P.O. Box 6162, Havana 10600, Cuba
| | - Osmany González
- Animal Biotechnology Department, Center for Genetic Engineering and Biotechnology (CIGB), P.O. Box 6162, Havana 10600, Cuba
| | - Antonio Morales
- Animal Biotechnology Department, Center for Genetic Engineering and Biotechnology (CIGB), P.O. Box 6162, Havana 10600, Cuba
| | - Lisbet Ulloa
- Research and Development Department, Center for Genetic Engineering and Biotechnology (CIGB), P.O. Box 83, Sancti Spíritus 60200, Cuba
| | - Reinaldo Blanco
- Production Department, Center for Genetic Engineering and Biotechnology (CIGB), P.O. Box 83, Sancti Spíritus 60200, Cuba
| | - Joel Pérez
- Production Department, Center for Genetic Engineering and Biotechnology (CIGB), P.O. Box 83, Sancti Spíritus 60200, Cuba
| | - Dayamí Dorta
- Production Department, Center for Genetic Engineering and Biotechnology (CIGB), P.O. Box 83, Sancti Spíritus 60200, Cuba
| | - Yaramis Luna
- Production Department, Center for Genetic Engineering and Biotechnology (CIGB), P.O. Box 83, Sancti Spíritus 60200, Cuba
| | - Hilda Elisa Garay
- Peptides Synthesis Department, Center for Genetic Engineering and Biotechnology (CIGB), P.O. Box 6162, Havana 10600, Cuba
| | - David Diago Abreu
- Peptides Synthesis Department, Center for Genetic Engineering and Biotechnology (CIGB), P.O. Box 6162, Havana 10600, Cuba
| | - Yassel Ramos
- Proteomics Department, Center for Genetic Engineering and Biotechnology (CIGB), P.O. Box 6162, Havana, 10600, Cuba
| | - Vladimir Besada
- Proteomics Department, Center for Genetic Engineering and Biotechnology (CIGB), P.O. Box 6162, Havana, 10600, Cuba
| | - Yeosvany Cabrera
- Research and Development Department, Center for Genetic Engineering and Biotechnology (CIGB), P.O. Box 83, Sancti Spíritus 60200, Cuba
| | - Mario Pablo Estrada
- Animal Biotechnology Department, Center for Genetic Engineering and Biotechnology (CIGB), P.O. Box 6162, Havana 10600, Cuba
- Corresponding authors.
| | - Yamila Carpio
- Animal Biotechnology Department, Center for Genetic Engineering and Biotechnology (CIGB), P.O. Box 6162, Havana 10600, Cuba
- Corresponding authors.
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Castro PL, Barac F, Hansen TJ, Fjelldal PG, Hordvik I, Bjørgen H, Koppang EO. The Distribution of IgT mRNA + Cells in the Gut of the Atlantic Salmon ( Salmo salar L.). Animals (Basel) 2023; 13:3191. [PMID: 37893915 PMCID: PMC10603744 DOI: 10.3390/ani13203191] [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: 08/10/2023] [Revised: 10/01/2023] [Accepted: 10/07/2023] [Indexed: 10/29/2023] Open
Abstract
The newly discovered IgT+ B cell is thought to play a dominant role in mucosal immunity, but limited studies have examined its distribution in fish species, hindering our understanding of its function. This study investigated IgT and poly Ig receptor (pIgR) mRNA+ cell distribution in Atlantic salmon (Salmo salar) gut using RNAscope in situ hybridization (ISH) and assessed the effects of vaccination. The pyloric caeca, mid-intestine (first and second parts), and posterior segment in two weight stages (Group 1: avg. 153 g, Group 2: avg. 1717 g) were examined in both vaccinated and unvaccinated fish. ISH revealed more IgT mRNA+ cells in the second part of the midgut compared to other intestinal segments, as well as a higher number of positive cells in Group 2 (older fish). In line with previous findings, intraperitoneal vaccination had no significant impact on the number of IgT+ transcripts. IgT mRNA+ cells were found mostly in the lamina propria and near capillaries, while pIgR was registered in both the lamina propria and mucosa. Interestingly, vaccinated fish presented adhesions and granulomatous tissue in the peritoneum, with both IgT and pIgR mRNA+ cells. Taken together, these results suggest that the distribution of IgT mRNA+ cells in the intestine of Atlantic salmon is region-specific and is not affected by intraperitoneal vaccination but varies with fish age.
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Affiliation(s)
- Pedro Luis Castro
- GIA-ECOAQUA, Universidad de Las Palmas de Gran Canaria, 35001 Telde, Spain
| | - Fran Barac
- Unit of Anatomy, Veterinary Faculty, Norwegian University of Life Sciences, 1433 Ås, Norway; (F.B.); (H.B.); (E.O.K.)
| | - Tom Johnny Hansen
- Matre Research Station, Institute of Marine Research, 5984 Matredal, Norway; (T.J.H.); (P.G.F.)
| | - Per Gunnar Fjelldal
- Matre Research Station, Institute of Marine Research, 5984 Matredal, Norway; (T.J.H.); (P.G.F.)
| | - Ivar Hordvik
- Institute of Biology, University of Bergen, 5007 Bergen, Norway;
| | - Håvard Bjørgen
- Unit of Anatomy, Veterinary Faculty, Norwegian University of Life Sciences, 1433 Ås, Norway; (F.B.); (H.B.); (E.O.K.)
| | - Erling Olaf Koppang
- Unit of Anatomy, Veterinary Faculty, Norwegian University of Life Sciences, 1433 Ås, Norway; (F.B.); (H.B.); (E.O.K.)
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3
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Wang T, Jin S, Lv R, Meng Y, Li G, Han Y, Zhang Q. Development of an indirect ELISA for detection of the adaptive immune response of black carp (Mylopharyngodon piceus). J Immunol Methods 2023; 521:113550. [PMID: 37661050 DOI: 10.1016/j.jim.2023.113550] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2022] [Revised: 07/02/2023] [Accepted: 08/24/2023] [Indexed: 09/05/2023]
Abstract
Black carp (Mylopharyngodon piceus) is an important fishery resource and the main breeding target in China. Due to the lack of an assay of immunoglobulin M (IgM) antibodies in black carp, there is no effective method to evaluate adaptive immune response, which limits immunological studies and vaccine development. The present study used mAbs (monoclonal antibodies) against serum IgM of grass carp as capture antibodies. The results of Western blot analysis indicated that these antibodies had strong affinity and specificity to IgM heavy chain in black carp serum and were used to detect the antibody titer, optimize the conditions, perform a sensitivity test, and develop an indirect ELISA (enzyme-linked immunosorbent assay) to detect specific IgM antibodies in the serum. This detection method has good specificity and is effective only for grass carp (Ctenopharyngodon idella) and black carp and not for crucian carp (Carassius aumtus), silver carp (Hypophthalmichthys molitrix), bighead carp (Hypophthalmichthys nobilis), mandarin fish (Siniperca chuatsi), black bream (Megalobrama skolkovii), or yellow catfish (Pseudobagrus fulvidraco). The lowest antigen detection level was 0.05 μg/ml. The error of experimental repetition in the same sample was 1.61-4.61%. The levels of specific IgM in black carp serum were steadily increased after immunization, peaked on day 28, and then slowly decreased. Indirect ELISA can be applied to detect the changes in specific antibodies in black carp serum. Moreover, indirect ELISA provides a convenient and reliable serological detection method for immunological research and evaluation of immune effects of a vaccine in black carp.
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Affiliation(s)
- Tongtong Wang
- School of Agriculture, Ludong University, Yantai, China
| | - Shanshan Jin
- School of Agriculture, Ludong University, Yantai, China
| | - Ruoxuan Lv
- School of Agriculture, Ludong University, Yantai, China
| | - Yuting Meng
- School of Agriculture, Ludong University, Yantai, China
| | - Guozhong Li
- School of Agriculture, Ludong University, Yantai, China
| | - Yuxing Han
- School of Agriculture, Ludong University, Yantai, China
| | - Qiusheng Zhang
- School of Agriculture, Ludong University, Yantai, China.
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Song HC, Yang YX, Lan QG, Cong W. Immunological effects of recombinant Lactobacillus casei expressing pilin MshB fused with cholera toxin B subunit adjuvant as an oral vaccine against Aeromonas veronii infection in crucian carp. FISH & SHELLFISH IMMUNOLOGY 2023:108934. [PMID: 37419434 DOI: 10.1016/j.fsi.2023.108934] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/03/2023] [Revised: 06/08/2023] [Accepted: 07/03/2023] [Indexed: 07/09/2023]
Abstract
Aeromonas veronii is a zoonotic agent capable of infecting fish and mammals, including humans, posing a serious threat to the development of aquaculture and public health safety. Currently, few effective vaccines are available through convenient routes against A. veronii infection. Herein, we developed vaccine candidates by inserting MSH type VI pili B (MshB) from A. veronii as an antigen and cholera toxin B subunit (CTB) as a molecular adjuvant into Lactobacillus casei and evaluated their immunological effect as vaccines in a crucian carp (Carassius auratus) model. The results suggested that recombinant L. casei Lc-pPG-MshB and Lc-pPG-MshB-CTB can be stably inherited for more than 50 generations. Oral administration of recombinant L. casei vaccine candidates stimulated the production of high levels of serum-specific immunoglobulin M (IgM) and increased the activity of acid phosphatase (ACP), alkaline phosphatase (AKP) superoxide dismutase (SOD), lysozyme (LZM), complement 3 (C3) and C4 in crucian carp (carassius auratus) compared to the control group (Lc-pPG612 group and PBS group) without significant changes. Moreover, the expression levels of interleukin-10 (IL-10), interleukin-1β (IL-1β), tumour necrosis factor-α (TNF-α) and transforming growth factor-β (TGF-β) genes in the gills, liver, spleen, kidney and gut of crucian carp orally immunized with recombinant L. casei were significantly upregulated compared to the control groups, indicating that recombinant L. casei induced a significant cellular immune response. In addition, viable recombinant L. casei can be detected and stably colonized in the intestine tract of crucian carp. Particularly, crucian carp immunized orally with Lc-pPG-MshB and Lc-pPG-MshB-CTB exhibited higher survival rates (48% for Lc-pPG-MshB and 60% for Lc-pPG-MshB-CTB) and significantly reduced loads of A. veronii in the major immune organs after A. veronii challenge. Our findings indicated that both recombinant L. casei strains provide favorable immune protection, with Lc-pPG-MshB-CTB in particular being more effective and promising as an ideal candidate for oral vaccination.
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Affiliation(s)
- Hai-Chao Song
- Marine College, Shandong University, Weihai, Shandong Province, 264209, PR China
| | - Yi-Xuan Yang
- College of Veterinary Medicine, College of Animal Science and Technology, Jilin Agricultural University, Changchun, 130118, PR China
| | - Qi-Guan Lan
- College of Veterinary Medicine, College of Animal Science and Technology, Jilin Agricultural University, Changchun, 130118, PR China
| | - Wei Cong
- Marine College, Shandong University, Weihai, Shandong Province, 264209, PR China.
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Jirapongpairoj W, Nozaki R, Koiwai K, Hirono I, Kondo H. Identification of a rabbit Ig light chain recombinant protein bound to serum immunoglobulins from different marine fish species. FISH & SHELLFISH IMMUNOLOGY 2022; 127:939-947. [PMID: 35868474 DOI: 10.1016/j.fsi.2022.07.032] [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: 03/15/2022] [Revised: 07/05/2022] [Accepted: 07/11/2022] [Indexed: 06/15/2023]
Abstract
The structures of fish serum immunoglobulin differ among different fish species. In this study, we accidently isolated a rabbit immunoglobulin (Ig) light chain bound to serum immunoglobulin from different marine fish species using phage display. Fish Ig was separated using a protein A column. The phage library was generated from variable regions of rabbit spleen B cells immunized with bluefin tuna Thunnus orientalis Ig. Fish Ig-specific phages were enriched using two rounds of bio-panning with yellowtail Seriola quinqueradiata serum Ig, followed by two rounds of bio-panning with red seabream Pagrus major serum Ig. The enriched phages demonstrated an increase in binding specificity to the tuna, yellowtail, and red seabream Igs compared to the phages listed in the unpanned library. A recombinant protein of a single clonal phage, which encodes the rabbit Ig light chain, was produced, and the binding specificities to fish Igs were analyzed using enzyme-linked immunosorbent assay (ELISA) and western blotting. The recombinant protein exhibited binding properties to fish Igs in the ELISA. However, the recombinant protein that bound to serum protein(s), but not IgM, was detected via western blotting. The recombinant protein may provide a novel information on the common structural feature in the fish immunoglobulins.
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Affiliation(s)
- Walissara Jirapongpairoj
- Laboratory of Genome Science, Graduate School of Tokyo University of Marine Science and Technology, Konan 4-5-7, Minato-ku, Tokyo, 108-8477, Japan
| | - Reiko Nozaki
- Laboratory of Genome Science, Graduate School of Tokyo University of Marine Science and Technology, Konan 4-5-7, Minato-ku, Tokyo, 108-8477, Japan
| | - Keiichiro Koiwai
- Laboratory of Genome Science, Graduate School of Tokyo University of Marine Science and Technology, Konan 4-5-7, Minato-ku, Tokyo, 108-8477, Japan
| | - Ikuo Hirono
- Laboratory of Genome Science, Graduate School of Tokyo University of Marine Science and Technology, Konan 4-5-7, Minato-ku, Tokyo, 108-8477, Japan
| | - Hidehiro Kondo
- Laboratory of Genome Science, Graduate School of Tokyo University of Marine Science and Technology, Konan 4-5-7, Minato-ku, Tokyo, 108-8477, Japan.
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Zhou X, Jiang H, Tang Z, Sun H, Lin Z, Bian Q, Yao G, Zhang T, Chen M, Zeng W, Yu X, Huang Y. Acquirement of HRP conjunct IgG anti-IgMs from most widely cultured freshwater fishes in China and its immunoreactivity. AN ACAD BRAS CIENC 2021; 93:e20191024. [PMID: 34787166 DOI: 10.1590/0001-3765202120191024] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2019] [Accepted: 02/14/2020] [Indexed: 11/21/2022] Open
Abstract
Until now, custom-made or commercial polyclonal antibody against only one kind of fish IgM limited application of the antibody. During our research on development of vaccine against infection of Clonorchis sinensis (C. sinensis) in several kinds of fish, we were conscious of the urgency of secondary antibody to evaluate immune effect and screen C. sinensis infection with immunological technology instead of labor-intensive and time-consuming squash or artificial digestion of fish flesh. So that, we purified IgM of grass carp, bighead carp, crucian carp, common carp and tilapia which were widely cultured freshwater fishes in most areas of China. On this basis, we generated HRP-conjunct rabbit IgG anti-fish IgMs with high titers. IgM of other freshwater fishes including oshima, yellow catfish, bream, silver carp and so on could be recognized by the IgG sensitively. Additionally, The ELISA detection displayed that the IgG could be more specific and sensitive than custom-made rabbit IgG anti-grass carp IgM. The acquirement of HRP-conjunct rabbit IgG anti-fish IgMs was the cornerstone for studying the immune system of teleost fish, developing immunoassay methods and evaluation of fish vaccine with more convenience.
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Affiliation(s)
- Xinyi Zhou
- Sun Yat-sen University, Zhongshan School of Medicine, Department of Parasitology, Guangzhou, Guangdong, People's Republic of China.,Guangzhou Xinhua University, School of Health Sciences, Guangzhou, China.,Sun Yat-sen University, Key Laboratory for Tropical Diseases Control of Ministry of Education, Guangzhou, Guangdong, People's Republic of China.,Provincial Engineering Techonology Research Center for Biological Vector Control, Guangzhou, Guangdong, People's Republic of China
| | - Hongye Jiang
- Sun Yat-sen University, Zhongshan School of Medicine, Department of Parasitology, Guangzhou, Guangdong, People's Republic of China.,Sun Yat-sen University, Key Laboratory for Tropical Diseases Control of Ministry of Education, Guangzhou, Guangdong, People's Republic of China.,Provincial Engineering Techonology Research Center for Biological Vector Control, Guangzhou, Guangdong, People's Republic of China
| | - Zeli Tang
- Sun Yat-sen University, Zhongshan School of Medicine, Department of Parasitology, Guangzhou, Guangdong, People's Republic of China.,Guangzhou Xinhua University, School of Health Sciences, Guangzhou, China.,Sun Yat-sen University, Key Laboratory for Tropical Diseases Control of Ministry of Education, Guangzhou, Guangdong, People's Republic of China.,Guangxi Medical University, School of Pre-clinical Medicine, Department of Cell Biology and Genetics Nanning, PR China
| | - Hengchang Sun
- Sun Yat-sen University, Zhongshan School of Medicine, Department of Parasitology, Guangzhou, Guangdong, People's Republic of China.,Guangzhou Xinhua University, School of Health Sciences, Guangzhou, China.,Sun Yat-sen University, Key Laboratory for Tropical Diseases Control of Ministry of Education, Guangzhou, Guangdong, People's Republic of China.,The Third Affiliated Hospital, Department of Laboratory Medicine, Sun Yat-sen University, Guangzhou, China
| | - Zhipeng Lin
- Sun Yat-sen University, Zhongshan School of Medicine, Department of Parasitology, Guangzhou, Guangdong, People's Republic of China.,Sun Yat-sen University, Key Laboratory for Tropical Diseases Control of Ministry of Education, Guangzhou, Guangdong, People's Republic of China.,Provincial Engineering Techonology Research Center for Biological Vector Control, Guangzhou, Guangdong, People's Republic of China
| | - Qing Bian
- Sun Yat-sen University, Zhongshan School of Medicine, Department of Parasitology, Guangzhou, Guangdong, People's Republic of China.,Sun Yat-sen University, Key Laboratory for Tropical Diseases Control of Ministry of Education, Guangzhou, Guangdong, People's Republic of China.,Provincial Engineering Techonology Research Center for Biological Vector Control, Guangzhou, Guangdong, People's Republic of China
| | - Guanqun Yao
- Sun Yat-sen University, Zhongshan School of Medicine, Department of Parasitology, Guangzhou, Guangdong, People's Republic of China.,Sun Yat-sen University, Key Laboratory for Tropical Diseases Control of Ministry of Education, Guangzhou, Guangdong, People's Republic of China.,Provincial Engineering Techonology Research Center for Biological Vector Control, Guangzhou, Guangdong, People's Republic of China
| | - Tianyou Zhang
- Sun Yat-sen University, Zhongshan School of Medicine, Department of Parasitology, Guangzhou, Guangdong, People's Republic of China.,Sun Yat-sen University, Key Laboratory for Tropical Diseases Control of Ministry of Education, Guangzhou, Guangdong, People's Republic of China.,Provincial Engineering Techonology Research Center for Biological Vector Control, Guangzhou, Guangdong, People's Republic of China
| | - Meicheng Chen
- Sun Yat-sen University, Zhongshan School of Medicine, Department of Parasitology, Guangzhou, Guangdong, People's Republic of China.,Sun Yat-sen University, Key Laboratory for Tropical Diseases Control of Ministry of Education, Guangzhou, Guangdong, People's Republic of China.,Provincial Engineering Techonology Research Center for Biological Vector Control, Guangzhou, Guangdong, People's Republic of China
| | - Weiwei Zeng
- Foshan University, School of Life Science and Engineering, Guangdong Provincial Key Laboratory of Animal Molecular Design and Precise Breeding, Foshan, China
| | - Xinbing Yu
- Sun Yat-sen University, Zhongshan School of Medicine, Department of Parasitology, Guangzhou, Guangdong, People's Republic of China.,Sun Yat-sen University, Key Laboratory for Tropical Diseases Control of Ministry of Education, Guangzhou, Guangdong, People's Republic of China.,Provincial Engineering Techonology Research Center for Biological Vector Control, Guangzhou, Guangdong, People's Republic of China
| | - Yan Huang
- Sun Yat-sen University, Zhongshan School of Medicine, Department of Parasitology, Guangzhou, Guangdong, People's Republic of China.,Sun Yat-sen University, Key Laboratory for Tropical Diseases Control of Ministry of Education, Guangzhou, Guangdong, People's Republic of China.,Provincial Engineering Techonology Research Center for Biological Vector Control, Guangzhou, Guangdong, People's Republic of China
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7
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Velázquez J, Rodríguez A, Aragón H, Haidar A, González M, Valdés R, Garay HE, Abreu DD, Ramos Y, Cabrales A, Morales A, González O, Herrera F, Estrada MP, Carpio Y. Monoclonal antibody against Nile tilapia (Oreochromis niloticus) IgM heavy chain: A valuable tool for detection and quantification of IgM and IgM + cells. FISH & SHELLFISH IMMUNOLOGY 2021; 110:44-54. [PMID: 33348037 DOI: 10.1016/j.fsi.2020.12.007] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/26/2020] [Revised: 11/26/2020] [Accepted: 12/15/2020] [Indexed: 06/12/2023]
Abstract
Nile tilapia (Oreochromis niloticus) is a freshwater fish, which is extensively cultivated worldwide and constitutes one of the model species for the study of fish immunology. Monoclonal antibodies are very advantageous molecular tools for studying teleost immune system. Specifically, monoclonal antibodies that react with immunoglobulins are used successfully in the study of the humoral immune response of several fish species. In the present study, we produced and characterized a monoclonal antibody against tilapia IgM heavy chain using a peptide-based strategy. The peptide sequence was selected from the surface-exposed region between CH3-CH4 domains. The specificity of the polyclonal serum and the hybridoma culture supernatant obtained by immunization with the peptide conjugated to keyhole limpet hemocyanin were evaluated by western blotting, both showing reactivity against tilapia serum IgM. The purified mAb was able to recognize secreted IgM by western blotting and ELISA and membrane IgM by flow cytometry. We also demonstrated that the antibody doesn't cross-react with a recombinant IgT fragment. This tool allowed us to study for the first time the stimulation of mucosal immunity after Pituitary Adenylate Cyclase Activating Polypeptide administration. Overall, the results demonstrated the utility of this mAb to characterize humoral immune response in O. niloticus.
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Affiliation(s)
- Janet Velázquez
- Animal Biotechnology Department, Center for Genetic Engineering and Biotechnology (CIGB), P.O. Box 6162, Havana, 10600, Cuba
| | - Alianet Rodríguez
- Animal Biotechnology Department, Center for Genetic Engineering and Biotechnology (CIGB), P.O. Box 6162, Havana, 10600, Cuba
| | - Hasel Aragón
- Monoclonal Antibodies Department, Center for Genetic Engineering and Biotechnology (CIGB), P.O. Box 6162, Havana, 10600, Cuba
| | - Arlette Haidar
- Animal Biotechnology Department, Center for Genetic Engineering and Biotechnology (CIGB), P.O. Box 6162, Havana, 10600, Cuba
| | - Marcos González
- Monoclonal Antibodies Department, Center for Genetic Engineering and Biotechnology (CIGB), P.O. Box 6162, Havana, 10600, Cuba
| | - Rodolfo Valdés
- Monoclonal Antibodies Department, Center for Genetic Engineering and Biotechnology (CIGB), P.O. Box 6162, Havana, 10600, Cuba
| | - Hilda Elsa Garay
- Peptides Synthesis Department, Center for Genetic Engineering and Biotechnology (CIGB), P.O. Box 6162, Havana, 10600, Cuba
| | - David Diago Abreu
- Peptides Synthesis Department, Center for Genetic Engineering and Biotechnology (CIGB), P.O. Box 6162, Havana, 10600, Cuba
| | - Yassel Ramos
- Proteomics Department, Center for Genetic Engineering and Biotechnology (CIGB), P.O. Box 6162, Havana, 10600, Cuba
| | - Ania Cabrales
- Analytic and Purification Department, Center for Genetic Engineering and Biotechnology (CIGB), P.O. Box 6162, Havana, 10600, Cuba
| | - Antonio Morales
- Animal Biotechnology Department, Center for Genetic Engineering and Biotechnology (CIGB), P.O. Box 6162, Havana, 10600, Cuba
| | - Osmany González
- Animal Biotechnology Department, Center for Genetic Engineering and Biotechnology (CIGB), P.O. Box 6162, Havana, 10600, Cuba
| | - Fidel Herrera
- Animal Biotechnology Department, Center for Genetic Engineering and Biotechnology (CIGB), P.O. Box 6162, Havana, 10600, Cuba
| | - Mario Pablo Estrada
- Animal Biotechnology Department, Center for Genetic Engineering and Biotechnology (CIGB), P.O. Box 6162, Havana, 10600, Cuba.
| | - Yamila Carpio
- Animal Biotechnology Department, Center for Genetic Engineering and Biotechnology (CIGB), P.O. Box 6162, Havana, 10600, Cuba.
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8
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An Ancient BCR-like Signaling Promotes ICP Production and Hemocyte Phagocytosis in Oyster. iScience 2020; 23:100834. [PMID: 31982779 PMCID: PMC6994640 DOI: 10.1016/j.isci.2020.100834] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2019] [Revised: 11/24/2019] [Accepted: 01/08/2020] [Indexed: 12/11/2022] Open
Abstract
BCR/TCR-based adaptive immune systems arise in the jawed vertebrates, and B cell receptors (BCRs) play an important role in the clonal selection of B cells and their differentiation into antibody-secreting plasma cells. The existence of BCR-like molecule and the activation mechanism of the downstream response are still not clear in invertebrates. In this study, an ancient BCR-like molecule (designated as CgIgR) with an immunoreceptor tyrosine-based activation motif (ITAM) in its cytoplasmic tail was identified from the Pacific oyster Crassostrea gigas to investigate its involvement in immune response. CgIgR could bind different bacteria through five extracellular Ig domains and formed dimers. The activated CgIgR recruited CgSyk to promote CgERK phosphorylation. The CgIgR-mediated signaling promoted the production of immunoglobulin domain-containing proteins (CgICP-2 and CgLRRIG-1) through inducing CgH3K4me2. The produced CgICPs eventually facilitated hemocytes to phagocytize and eliminate V. splendidus. This study proposed that there was an ancient BCR-like molecule and BCR-like signaling in molluscs. An ancient BCR-like molecule (defined as CgIgR) was identified from C. gigas We propose IgR-mediated signaling induces CgERK activity in oyster IgR-mediated signaling induced CgH3K4me2 to promote the production of CgICPs CgICPs facilitated the hemocytes to phagocytize and eliminate V. splendidus
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