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Xing J, An Z, Tang X, Sheng X, Chi H, Zhan W. Expression and Immune Characterization of Major Histocompatibility Complex in Paralichthys olivaceus after Antigen Stimulation. BIOLOGY 2023; 12:1464. [PMID: 38132290 PMCID: PMC10741117 DOI: 10.3390/biology12121464] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/16/2023] [Revised: 11/18/2023] [Accepted: 11/21/2023] [Indexed: 12/23/2023]
Abstract
The Major histocompatibility complex (Mhc) is an important molecule for antigen presenting and binds to T cell receptors, activating T lymphocytes and triggering specific immune responses. To investigate the role of MhcII in adaptive immunity, in this study, mhcIIα and mhcIIβ of flounder (Paralichthys olivaceus) were cloned, polyclonal antibodies (Abs) against their extracellular regions were produced, respectively, and their distribution on cells and tissues and expression patterns, which varied by antigen stimulation or pathogen infection, were investigated. The results showed that the open reading frame (ORF) of mhcIIα is 708 bp, including 235 amino acids (aa); and the ORF of mhcIIβ is 741 bp, encoding 246aa. The mhcIIα and mhcIIβ were significantly expressed in gills, spleen, and peripheral blood leukocytes (PBLs). Their antibodies could specifically recognize eukaryotic expressed MhcIIα and MhcIIβ. MhcIIα+ and MhcIIβ+ cells were 30.2 ± 2.9% of the percentage in peripheral blood leukocytes. MhcII molecules were co-localized with CD83 and IgM on leukocytes, respectively, but not on CD4+ or CD8+ T lymphocyte subpopulations. The expression of both mhcIIα and mhcIIβ were significantly upregulated in flounder after bacteria and virus challenges. The percentages of MhcII+ cells, MhcII+/CD83+, and MhcII+/IgM+ double-positive cells increased significantly after PHA and ConA stimulation, respectively; they varied significantly in PBLs after polyI:C stimulation, and no variations were found after LPS treatment. In the meantime, variations in MhcII+ cells were consistent with that of CD4+ T lymphocytes. These results suggest that MhcII, mainly expressed in B cells and dendritic cells, play an essential role in antigen presentation, and respond significantly to exogenous antigens and T cell-dependent antigens. These results may provide an important reference for the study of cellular immunity in teleosts.
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Affiliation(s)
- Jing Xing
- Laboratory of Pathology and Immunology of Aquatic Animals, Key Laboratory of Mariculture, Ministry of Education (KLMME), Ocean University of China, 5 Yushan Road, Qingdao 266003, China; (J.X.); (Z.A.); (X.T.); (X.S.); (H.C.)
- Laboratory for Marine Fisheries Science and Food Production Processes, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266071, China
| | - Zhaoxia An
- Laboratory of Pathology and Immunology of Aquatic Animals, Key Laboratory of Mariculture, Ministry of Education (KLMME), Ocean University of China, 5 Yushan Road, Qingdao 266003, China; (J.X.); (Z.A.); (X.T.); (X.S.); (H.C.)
| | - Xiaoqian Tang
- Laboratory of Pathology and Immunology of Aquatic Animals, Key Laboratory of Mariculture, Ministry of Education (KLMME), Ocean University of China, 5 Yushan Road, Qingdao 266003, China; (J.X.); (Z.A.); (X.T.); (X.S.); (H.C.)
- Laboratory for Marine Fisheries Science and Food Production Processes, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266071, China
| | - Xiuzhen Sheng
- Laboratory of Pathology and Immunology of Aquatic Animals, Key Laboratory of Mariculture, Ministry of Education (KLMME), Ocean University of China, 5 Yushan Road, Qingdao 266003, China; (J.X.); (Z.A.); (X.T.); (X.S.); (H.C.)
| | - Heng Chi
- Laboratory of Pathology and Immunology of Aquatic Animals, Key Laboratory of Mariculture, Ministry of Education (KLMME), Ocean University of China, 5 Yushan Road, Qingdao 266003, China; (J.X.); (Z.A.); (X.T.); (X.S.); (H.C.)
| | - Wenbin Zhan
- Laboratory of Pathology and Immunology of Aquatic Animals, Key Laboratory of Mariculture, Ministry of Education (KLMME), Ocean University of China, 5 Yushan Road, Qingdao 266003, China; (J.X.); (Z.A.); (X.T.); (X.S.); (H.C.)
- Laboratory for Marine Fisheries Science and Food Production Processes, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266071, China
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Qian K, Fu S, Wang J, Li Y, Xian J, Ye J. Major histocompatibility complex class IIα and IIβ of pufferfish (Takifugu obscurus): Identification and functional characterization in response to bacterial challenge. JOURNAL OF FISH DISEASES 2023; 46:1049-1064. [PMID: 37357462 DOI: 10.1111/jfd.13824] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/25/2023] [Revised: 05/31/2023] [Accepted: 06/05/2023] [Indexed: 06/27/2023]
Abstract
Classical major histocompatibility complex (MHC) class II molecules play an essential role in immune system. In this study, MHC IIα (Pf-MHC IIα) and MHC IIβ (Pf-MHC IIβ) homology genes from pufferfish (Takifugu obscurus) were cloned and their functional characterization in response to bacterial challenge was identified. The nucleotide sequences of the open reading frames (ORFs) of pufferfish Pf-MHC IIα and Pf-MHC IIβ were 708 bp and 750 bp, encoding 235 aa and 249 aa, respectively. The structure of Pf-MHC IIα or Pf-MHC IIβ contained a signal peptide, an α1/β1 domain, an α2/β2 domain, a transmembrane region and a cytoplasmic region. Multiple sequence alignment and phylogenetic analysis showed that Pf-MHC IIα and Pf-MHC IIβ molecules had the highest similarity with Fugu rubripes (Takifugu rubripes). Cellular localization analysis indicated that the distribution of Pf-MHC IIα and Pf-MHC IIβ was in the lymphocyte membrane and cytoplasm. qRT-PCR results showed that Pf-MHC IIα and Pf-MHC IIβ expressed relatively high in skin, gills and gut. In addition, after stimulation challenge in vitro (lipopolysaccharide, or polyinosinic: polycytidylic acid) and in vivo (A. hydrophila), the mRNA expressions of Pf-MHC IIα and Pf-MHC IIβ were significantly up-regulated in lymphocytes and in tissues of skin, gills, gut and head kidney. Moreover, Pf-MHC IIα or Pf-MHC IIβ neutralization reduced the ability of A. hydrophila to induce the expressions of lymphocyte cytokines (TNF-α, IL-1β and IL-10). Overall, it is speculated that Pf-MHC IIα and Pf-MHC IIβ may play an important role in the host response against A. hydrophila in pufferfish.
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Affiliation(s)
- Kun Qian
- Institute of Modern Aquaculture Science and Engineering, Guangdong Provincial Engineering Technology Research Center for Environmentally-Friendly Aquaculture, School of Life Sciences, South China Normal University, Guangzhou, China
| | - Shengli Fu
- Institute of Modern Aquaculture Science and Engineering, Guangdong Provincial Engineering Technology Research Center for Environmentally-Friendly Aquaculture, School of Life Sciences, South China Normal University, Guangzhou, China
| | - Junru Wang
- Institute of Modern Aquaculture Science and Engineering, Guangdong Provincial Engineering Technology Research Center for Environmentally-Friendly Aquaculture, School of Life Sciences, South China Normal University, Guangzhou, China
| | - Yuan Li
- Institute of Modern Aquaculture Science and Engineering, Guangdong Provincial Engineering Technology Research Center for Environmentally-Friendly Aquaculture, School of Life Sciences, South China Normal University, Guangzhou, China
| | - Jianan Xian
- Hainan Provincial Key Laboratory for Functional Components Research and Utilization of Marine Bio-resources, Institute of Tropical Biosciences and Biotechnology, CATAS, Haikou, China
| | - Jianmin Ye
- Institute of Modern Aquaculture Science and Engineering, Guangdong Provincial Engineering Technology Research Center for Environmentally-Friendly Aquaculture, School of Life Sciences, South China Normal University, Guangzhou, China
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Dearborn DC, Warren S, Hailer F. Meta-analysis of major histocompatibility complex (MHC) class IIA reveals polymorphism and positive selection in many vertebrate species. Mol Ecol 2022; 31:6390-6406. [PMID: 36208104 PMCID: PMC9729452 DOI: 10.1111/mec.16726] [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: 03/21/2022] [Revised: 09/13/2022] [Accepted: 09/21/2022] [Indexed: 01/13/2023]
Abstract
Pathogen-mediated selection and sexual selection are important drivers of evolution. Both processes are known to target genes of the major histocompatibility complex (MHC), a gene family encoding cell-surface proteins that display pathogen peptides to the immune system. The MHC is also a model for understanding processes such as gene duplication and trans-species allele sharing. The class II MHC protein is a heterodimer whose peptide-binding groove is encoded by an MHC-IIA gene and an MHC-IIB gene. However, our literature review found that class II MHC papers on infectious disease or sexual selection included IIA data only 18% and 9% of the time, respectively. To assess whether greater emphasis on MHC-IIA is warranted, we analysed MHC-IIA sequence data from 50 species of vertebrates (fish, amphibians, birds, mammals) to test for polymorphism and positive selection. We found that the number of MHC-IIA alleles within a species was often high, and covaried with sample size and number of MHC-IIA genes assayed. While MHC-IIA variability tended to be lower than that of MHC-IIB, the difference was only ~25%, with ~3 fewer IIA alleles than IIB. Furthermore, the unexpectedly high MHC-IIA variability showed clear signatures of positive selection in most species, and positive selection on MHC-IIA was stronger in fish than in other surveyed vertebrate groups. Our findings underscore that MHC-IIA can be an important target of selection. Future studies should therefore expand the characterization of MHC-IIA at both allelic and genomic scales, and incorporate MHC-IIA into models of fitness consequences of MHC variation.
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Affiliation(s)
- Donald C Dearborn
- Biology Department, Bates College, 44 Campus Ave, Lewiston, Maine, USA,Roux Institute, Northeastern University, Fore St, Portland, Maine, USA,Co-corresponding authors: and
| | - Sophie Warren
- Biology Department, Bates College, 44 Campus Ave, Lewiston, Maine, USA,Present address: Department of Health Policy, London School of Economics and Political Science, Houghton Street, London WC2A 2AE, UK
| | - Frank Hailer
- Organisms and Environment, School of Biosciences, Cardiff University, Sir Martin Evans Building, Museum Avenue, Cardiff CF10 3AX, Wales, UK,Co-corresponding authors: and
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Zhao W, Zhou J, Li Z, Jing T, Zhao L, Ye H. Characterization of 55 SNP markers in Chinese longsnout catfish Leriocassis Longirostris. CONSERV GENET RESOUR 2020. [DOI: 10.1007/s12686-020-01137-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Chen Y, Liu Y, Song M, Lai J, Sun J, Gong Q. Molecular polymorphism and expression of MHC I α, II α, II β and II invariant chain in the critically endangered Dabry's sturgeon (Acipenser dabryanus). DEVELOPMENTAL AND COMPARATIVE IMMUNOLOGY 2020; 103:103494. [PMID: 31513821 DOI: 10.1016/j.dci.2019.103494] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/17/2019] [Revised: 09/07/2019] [Accepted: 09/07/2019] [Indexed: 06/10/2023]
Abstract
The major histocompatibility complex (MHC) is a key player in the regulation of immune responses through presenting foreign antigens to T lymphocytes. In this study, three MHC genes, namely, MHC I α, II α, II β and the II invariant chain (Ii), were identified and characterized in the critically endangered Dabry's sturgeon (Acipenser dabryanus). A tissue distribution study showed that the MHC and Ii transcripts were widely expressed in various tissues. The highest expression levels of MHC I α, II α and Ii were found in the gill, while MHC II β was primarily expressed in the spleen. Challenge of A. dabryanus with a pathogenic bacterium in vivo resulted in significant upregulation of both MHC and Ii expression, indicating potential roles of these genes in immune response. Phylogenetic analysis showed that A. dabryanus MHC grouped with other teleost MHC genes and sequences from Polyodon spathula and A. dabryanus had an intermingling of alleles. According to the split time between paddlefishes and sturgeons, this result indicated that trans-species MHC lineages in Chondrostei were much older than those in tetrapods. The molecular polymorphisms of the complete open reading frame regions of the MHC genes were analysed in several A. dabryanus individuals. MHC II α and II β were highly polymorphic in different individuals, while MHC I α was more conserved. The ratio of non-synonymous substitution occurred at a significantly higher frequency than synonymous substitution in peptide-binding regions (PBR) of MHC II α and II β, demonstrating the existence of positive selection at peptide-binding sites. Our study suggested potential roles of the MHC chains in immune response to pathogen microbial infection, and the numerous alleles identified in this study will help further genetic management and molecular marker-assisted selective breeding programmes in A. dabryanus.
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Affiliation(s)
- Yeyu Chen
- The Fishery Institute of the Sichuan Academy of Agricultural Sciences, Chengdu, 611730, China
| | - Ya Liu
- The Fishery Institute of the Sichuan Academy of Agricultural Sciences, Chengdu, 611730, China
| | - Mingjiang Song
- The Fishery Institute of the Sichuan Academy of Agricultural Sciences, Chengdu, 611730, China
| | - Jiansheng Lai
- The Fishery Institute of the Sichuan Academy of Agricultural Sciences, Chengdu, 611730, China
| | - Jiahua Sun
- The Fishery Institute of the Sichuan Academy of Agricultural Sciences, Chengdu, 611730, China
| | - Quan Gong
- The Fishery Institute of the Sichuan Academy of Agricultural Sciences, Chengdu, 611730, China.
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Cao Z, Wang L, Xiang Y, Liu X, Tu Z, Sun Y, Zhou Y. MHC class IIα polymorphism and its association with resistance/susceptibility to Vibrio harveyi in golden pompano (Trachinotus ovatus). FISH & SHELLFISH IMMUNOLOGY 2018; 80:302-310. [PMID: 29902561 DOI: 10.1016/j.fsi.2018.06.020] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/06/2018] [Revised: 05/13/2018] [Accepted: 06/11/2018] [Indexed: 06/08/2023]
Abstract
The major histocompatibility complex (MHC) plays an important role in the vertebrate immune response to antigenic peptides, and it is essential for recognizing foreign pathogens in organisms. In this study, MHC class IIα (Trov-MHC IIα) from the golden pompano (Trachinotus ovatus) was first cloned and identified. The gene structure of Trov-MHC IIα was contained four exons and three introns. High levels of polymorphism were found in the exon 2 of Trov-MHC IIα. A total of 29 different MHC class IIα alleles with high polymorphism were identified from 80 individuals. The ratio of non-synonymous substitutions (dN) to synonymous substitutions (dS) was 3.157 (>1) in the peptide binding regions (PBRs) of Trov-MHC IIα, suggesting positive balancing selection. Six alleles were selected to analyze the association between alleles and resistance/susceptibility to Vibrio harveyi in golden pompano. The results showed that Trov-DAA*6401 and Trov-DAA*6702 alleles were associated with the resistance to V. harveyi in golden pompano, while alleles Trov-DAA*6304 and Trov-DAA*7301 were associated with the susceptibility to V. harveyi in golden pompano. This study confirmed the association between alleles of MHC class IIα and disease resistance, and also detected some alleles which might be correlated with high V. harveyi-resistance. These disease resistance-related MHC alleles could be used as potential genetic markers for molecular marker-assisted selective breeding in the golden pompano.
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Affiliation(s)
- Zhenjie Cao
- State Key Laboratory of Marine Resource Utilization in South China Sea, Hainan University, PR China; Hainan Provincial Key Laboratory for Tropical Hydrobiology and Biotechnology, College of Marine Science, Hainan University, PR China; Institute of Tropical Agriculture and Forestry, Hainan University, PR China
| | - Lu Wang
- State Key Laboratory of Marine Resource Utilization in South China Sea, Hainan University, PR China; Key Laboratory of Tropical Biological Resources of Ministry of Education, Hainan University, PR China
| | - Yajing Xiang
- State Key Laboratory of Marine Resource Utilization in South China Sea, Hainan University, PR China; Key Laboratory of Tropical Biological Resources of Ministry of Education, Hainan University, PR China
| | - Xiaocen Liu
- State Key Laboratory of Marine Resource Utilization in South China Sea, Hainan University, PR China; Key Laboratory of Tropical Biological Resources of Ministry of Education, Hainan University, PR China
| | - Zhigang Tu
- Hainan Academy of Ocean and Fisheries Sciences, Haikou, Hainan, China
| | - Yun Sun
- State Key Laboratory of Marine Resource Utilization in South China Sea, Hainan University, PR China; Hainan Provincial Key Laboratory for Tropical Hydrobiology and Biotechnology, College of Marine Science, Hainan University, PR China.
| | - Yongcan Zhou
- State Key Laboratory of Marine Resource Utilization in South China Sea, Hainan University, PR China; Hainan Provincial Key Laboratory for Tropical Hydrobiology and Biotechnology, College of Marine Science, Hainan University, PR China.
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7
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Li C, Jiang J, Zhang Q, Wang X. Duplicated major histocompatibility complex class II genes in the tongue sole (Cynoglossus semilaevis
). Int J Immunogenet 2018; 45:210-224. [DOI: 10.1111/iji.12368] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2017] [Revised: 02/25/2018] [Accepted: 03/22/2018] [Indexed: 12/26/2022]
Affiliation(s)
- C. Li
- Ministry of Education Key Laboratory of Marine Genetics and Breeding; College of Marine Life Sciences; Ocean University of China; Qingdao China
| | - J. Jiang
- Ministry of Education Key Laboratory of Marine Genetics and Breeding; College of Marine Life Sciences; Ocean University of China; Qingdao China
| | - Q. Zhang
- Ministry of Education Key Laboratory of Marine Genetics and Breeding; College of Marine Life Sciences; Ocean University of China; Qingdao China
| | - X. Wang
- Ministry of Education Key Laboratory of Marine Genetics and Breeding; College of Marine Life Sciences; Ocean University of China; Qingdao China
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Characterization and expression of MHC class II alpha and II beta genes in mangrove red snapper ( Lutjanus argentimaculatus ). Mol Immunol 2015; 68:373-81. [DOI: 10.1016/j.molimm.2015.09.018] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2014] [Revised: 09/13/2015] [Accepted: 09/22/2015] [Indexed: 01/25/2023]
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9
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Characterization of MHC class II genes in the critically endangered European eel (Anguilla anguilla). CONSERV GENET RESOUR 2015. [DOI: 10.1007/s12686-015-0501-z] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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10
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Picchietti S, Abelli L, Guerra L, Randelli E, Proietti Serafini F, Belardinelli MC, Buonocore F, Bernini C, Fausto AM, Scapigliati G. MHC II-β chain gene expression studies define the regional organization of the thymus in the developing bony fish Dicentrarchus labrax (L.). FISH & SHELLFISH IMMUNOLOGY 2015; 42:483-493. [PMID: 25475077 DOI: 10.1016/j.fsi.2014.11.012] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/07/2014] [Revised: 11/06/2014] [Accepted: 11/12/2014] [Indexed: 06/04/2023]
Abstract
MHC II-β chain gene transcripts were quantified by real-time PCR and localised by in situ hybridization in the developing thymus of the teleost Dicentrarchus labrax, regarding the specialization of the thymic compartments. MHC II-β expression significantly rose when the first lymphoid colonization of the thymus occurred, thereafter increased further when the organ progressively developed cortex and medulla regions. The evolving patterns of MHC II-β expression provided anatomical insights into some mechanisms of thymocyte selection. Among the stromal cells transcribing MHC II-β, scattered cortical epithelial cells appeared likely involved in the positive selection, while those abundant in the cortico-medullary border and medulla in the negative selection. These latter most represent dendritic cells, based on typical localization and phenotype. These findings provide further proofs that efficient mechanisms leading to maturation of naïve T cells are operative in teleosts, strongly reminiscent of the models conserved in more evolved gnathostomes.
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Affiliation(s)
- S Picchietti
- Dep. for Innovation in Biological, Agro-food and Forest Systems, Tuscia University, Viterbo, Italy
| | - L Abelli
- Dep. Life Sciences & Biotechnology, University of Ferrara, Via Borsari 46, Ferrara 441241, Italy.
| | - L Guerra
- Dep. for Innovation in Biological, Agro-food and Forest Systems, Tuscia University, Viterbo, Italy
| | - E Randelli
- Dep. for Innovation in Biological, Agro-food and Forest Systems, Tuscia University, Viterbo, Italy
| | - F Proietti Serafini
- Dep. for Innovation in Biological, Agro-food and Forest Systems, Tuscia University, Viterbo, Italy
| | - M C Belardinelli
- Dep. for Innovation in Biological, Agro-food and Forest Systems, Tuscia University, Viterbo, Italy
| | - F Buonocore
- Dep. for Innovation in Biological, Agro-food and Forest Systems, Tuscia University, Viterbo, Italy
| | - C Bernini
- Dep. for Innovation in Biological, Agro-food and Forest Systems, Tuscia University, Viterbo, Italy
| | - A M Fausto
- Dep. for Innovation in Biological, Agro-food and Forest Systems, Tuscia University, Viterbo, Italy
| | - G Scapigliati
- Dep. for Innovation in Biological, Agro-food and Forest Systems, Tuscia University, Viterbo, Italy
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Wu C, Zhang D, Kan M, Lv Z, Zhu A, Su Y, Zhou D, Zhang J, Zhang Z, Xu M, Jiang L, Guo B, Wang T, Chi C, Mao Y, Zhou J, Yu X, Wang H, Weng X, Jin JG, Ye J, He L, Liu Y. The draft genome of the large yellow croaker reveals well-developed innate immunity. Nat Commun 2014; 5:5227. [PMID: 25407894 PMCID: PMC4263168 DOI: 10.1038/ncomms6227] [Citation(s) in RCA: 126] [Impact Index Per Article: 12.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2014] [Accepted: 09/10/2014] [Indexed: 12/19/2022] Open
Abstract
The large yellow croaker, Larimichthys crocea, is one of the most economically important marine fish species endemic to China. Its wild stocks have severely suffered from overfishing, and the aquacultured species are vulnerable to various marine pathogens. Here we report the creation of a draft genome of a wild large yellow croaker using a whole-genome sequencing strategy. We estimate the genome size to be 728 Mb with 19,362 protein-coding genes. Phylogenetic analysis shows that the stickleback is most closely related to the large yellow croaker. Rapidly evolving genes under positive selection are significantly enriched in pathways related to innate immunity. We also confirm the existence of several genes and identify the expansion of gene families that are important for innate immunity. Our results may reflect a well-developed innate immune system in the large yellow croaker, which could aid in the development of wild resource preservation and mariculture strategies.
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Affiliation(s)
- Changwen Wu
- National Engineering Research Center of Marine Facilities Aquaculture, Zhejiang Ocean University, Zhoushan 316022, China
| | - Di Zhang
- Bio-X Center, Key Laboratory for the Genetics of Developmental and Neuropsychiatric Disorders (Ministry of Education), Shanghai Jiao Tong University, Shanghai 200030, China
| | - Mengyuan Kan
- Institute for Nutritional Sciences, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, Graduate School of the Chinese Academy of Sciences, Shanghai 200031, China
| | - Zhengmin Lv
- National Engineering Research Center of Marine Facilities Aquaculture, Zhejiang Ocean University, Zhoushan 316022, China
| | - Aiyi Zhu
- National Engineering Research Center of Marine Facilities Aquaculture, Zhejiang Ocean University, Zhoushan 316022, China
| | - Yongquan Su
- College of Ocean and Earth Sciences, Xiamen University, Xiamen 361005, China
| | - Daizhan Zhou
- Bio-X Center, Key Laboratory for the Genetics of Developmental and Neuropsychiatric Disorders (Ministry of Education), Shanghai Jiao Tong University, Shanghai 200030, China
| | - Jianshe Zhang
- National Engineering Research Center of Marine Facilities Aquaculture, Zhejiang Ocean University, Zhoushan 316022, China
| | - Zhou Zhang
- Bio-X Center, Key Laboratory for the Genetics of Developmental and Neuropsychiatric Disorders (Ministry of Education), Shanghai Jiao Tong University, Shanghai 200030, China
| | - Meiying Xu
- National Engineering Research Center of Marine Facilities Aquaculture, Zhejiang Ocean University, Zhoushan 316022, China
| | - Lihua Jiang
- National Engineering Research Center of Marine Facilities Aquaculture, Zhejiang Ocean University, Zhoushan 316022, China
| | - Baoying Guo
- National Engineering Research Center of Marine Facilities Aquaculture, Zhejiang Ocean University, Zhoushan 316022, China
| | - Ting Wang
- Institute for Nutritional Sciences, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, Graduate School of the Chinese Academy of Sciences, Shanghai 200031, China
| | - Changfeng Chi
- National Engineering Research Center of Marine Facilities Aquaculture, Zhejiang Ocean University, Zhoushan 316022, China
| | - Yong Mao
- College of Ocean and Earth Sciences, Xiamen University, Xiamen 361005, China
| | - Jiajian Zhou
- National Engineering Research Center of Marine Facilities Aquaculture, Zhejiang Ocean University, Zhoushan 316022, China
| | - Xinxiu Yu
- National Engineering Research Center of Marine Facilities Aquaculture, Zhejiang Ocean University, Zhoushan 316022, China
| | - Hailing Wang
- National Engineering Research Center of Marine Facilities Aquaculture, Zhejiang Ocean University, Zhoushan 316022, China
| | - Xiaoling Weng
- Institutes of Biomedical Sciences, Fudan University, Shanghai 200032, China
| | - Jason Gang Jin
- ShanghaiBio Corporation, 675 US Highway One, North Brunswick, New Jersey 08902, USA
| | - Junyi Ye
- Institutes of Biomedical Sciences, Fudan University, Shanghai 200032, China
| | - Lin He
- Bio-X Center, Key Laboratory for the Genetics of Developmental and Neuropsychiatric Disorders (Ministry of Education), Shanghai Jiao Tong University, Shanghai 200030, China
| | - Yun Liu
- Institutes of Biomedical Sciences, Fudan University, Shanghai 200032, China
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12
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Shen T, He X, Lei M, Wang J, Li X, Li J. Cloning and structure of a histocompatibility class IIA gene (Lelo-DAA) in Chinese longsnout catfish (Leiocassis longirostris). Genes Genomics 2014. [DOI: 10.1007/s13258-014-0208-7] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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13
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Molecular cloning, genomic structure, polymorphism and expression analysis of major histocompatibility complex class IIA gene of swamp eel Monopterus albus. Biologia (Bratisl) 2014; 69:236-246. [PMID: 32214413 PMCID: PMC7089440 DOI: 10.2478/s11756-013-0307-y] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2013] [Accepted: 10/26/2013] [Indexed: 11/20/2022]
Abstract
Major histocompatibility complex (MHC) class II molecules play an important role in the immune response of vertebrates. In this paper, full-length MHC IIA cDNA was isolated from swamp eel (Monopterus albus) by rapid amplification of cDNA ends PCR. The genomic structure, molecular polymorphism, tissue distribution, and immune response of the MHC IIA gene to bacterial challenge were investigated. The full-length cDNA (GenBank accession No.: KC616308) is 1,509 bp in length including an 83 bp-long 5' untranslated region (UTR) and a 709 bp-long 3' UTR, which encoded a 238 amino acids protein. In the 2,339 bp-long MHC IIA genomic DNA, four exons and three introns were identified. Sequence comparison exhibited that the deduced amino acid sequence shared 27.1-66.3% identity with those of other species. Seven alleles were identified from five healthy individuals. Number of alleles per individual diversified from two to five. Five different 5' UTR sequences and two different 3' UTR sequences from one individual may infer the existence of five loci at least. Real-time quantitative PCR demonstrated that swamp eel MHC IIA transcripts were ubiquitously expressed in ten tissues, but the expression level was distinctly different. Significant changes were observed in liver, spleen, kidney and intestine after challenged with pathogenic bacteria Aeromonas hydrophilia.
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MH-DAB gene polymorphism and disease resistance to Flavobacterium columnare in grass carp (Ctenopharyngodon idellus). Gene 2013; 526:217-22. [DOI: 10.1016/j.gene.2013.05.019] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2013] [Revised: 05/14/2013] [Accepted: 05/17/2013] [Indexed: 11/20/2022]
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Zhu LY, Nie L, Zhu G, Xiang LX, Shao JZ. Advances in research of fish immune-relevant genes: a comparative overview of innate and adaptive immunity in teleosts. DEVELOPMENTAL AND COMPARATIVE IMMUNOLOGY 2013; 39:39-62. [PMID: 22504163 DOI: 10.1016/j.dci.2012.04.001] [Citation(s) in RCA: 304] [Impact Index Per Article: 27.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/12/2011] [Revised: 03/18/2012] [Accepted: 04/05/2012] [Indexed: 05/31/2023]
Abstract
Fish is considered to be an important model in comparative immunology studies because it is a representative population of lower vertebrates serving as an essential link to early vertebrate evolution. Fish immune-relevant genes have received considerable attention due to its role in improving understanding of both fish immunology and the evolution of immune systems. In this review, we discuss the current understanding of teleost immune-relevant genes for both innate and adaptive immunity, including pattern recognition receptors, antimicrobial peptides, complement molecules, lectins, interferons and signaling factors, inflammatory cytokines, chemokines, adaptive immunity relevant cytokines and negative regulators, major histocompatibility complexes, immunoglobulins, and costimulatory molecules. The implications of these factors on the evolutionary history of immune systems were discussed and a perspective outline of innate and adaptive immunity of teleost fish was described. This review may provide clues on the evolution of the essential defense system in vertebrates.
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Affiliation(s)
- Lv-yun Zhu
- College of Life Sciences, Zhejiang University, Hangzhou 310058, People's Republic of China
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16
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Dong ZD, Zhao Y, Zeng QF, Fu Y, Zhou FN, Ji XS, Wang H. Molecular cloning and polymorphism of the major histocompatibility complex (MHC) class IIB gene of grass carp (Ctenopharyngodon idella). Biochem Genet 2012; 51:139-46. [PMID: 23114719 DOI: 10.1007/s10528-012-9549-6] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2011] [Accepted: 07/09/2012] [Indexed: 11/29/2022]
Affiliation(s)
- Zhong-Dian Dong
- College of Animal Science and Technology, Shandong Agricultural University, Daizong Avenue 61, Taian, 271018, China
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17
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Wang F, Ma X, Wang W, Liu J. Comparison of proximate composition, amino acid and fatty acid profiles in wild, pond- and cage-cultured longsnout catfish (Leiocassis longirostris). Int J Food Sci Technol 2012. [DOI: 10.1111/j.1365-2621.2012.03033.x] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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18
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Bahr A, Wilson AB. The evolution of MHC diversity: evidence of intralocus gene conversion and recombination in a single-locus system. Gene 2012; 497:52-7. [PMID: 22301266 DOI: 10.1016/j.gene.2012.01.017] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2011] [Revised: 01/16/2012] [Accepted: 01/17/2012] [Indexed: 11/29/2022]
Abstract
Gene conversion, the unidirectional exchange of genetic material between homologous sequences, is thought to strongly influence patterns of genetic diversity. The high diversity of major histocompatibility complex (MHC) genes in many species is thought to reflect a long history of gene conversion events both within and among loci. Theoretical work suggests that intra- and interlocus gene conversion leave characteristic signatures of nucleotide diversity, but empirical studies of MHC variation have rarely been able to analyze the effects of conversion events in isolation, due to the presence of multiple gene copies in most species. The potbellied seahorse (Hippocampus abdominalis), a species with a single copy of the MH class II beta-chain gene (MHIIb), provides an ideal system in which to explore predictions on the effects of intralocus gene conversion on patterns of genetic diversity. The genetic diversity of the MHIIb peptide binding region (PBR) is high in the seahorse, similar to other vertebrate species. In contrast, the remainder of the gene shows a total absence of synonymous variation and low levels of intronic sequence diversity, concentrated in 3 short repetitive regions and 1-12 SNPs per intron. The distribution of substitutions across the gene results in a patchwork pattern of shared polymorphism between otherwise divergent sequences. The pattern of nucleotide diversity observed in the seahorse MHIIb gene is congruent with theoretical expectations for intralocus gene conversion, indicating that this evolutionary mechanism has played an important role in MHC gene evolution, contributing to both the high diversity in the PBR and the low diversity outside this region. Neutral variation at this locus may be further reduced due to biases in nucleotide composition and functional constraints.
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Affiliation(s)
- Angela Bahr
- Institute of Evolutionary Biology and Environmental Studies, University of Zurich, Zurich, Switzerland.
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