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Sahin M, Remy MM, Fallet B, Sommerstein R, Florova M, Langner A, Klausz K, Straub T, Kreutzfeldt M, Wagner I, Schmidt CT, Malinge P, Magistrelli G, Izui S, Pircher H, Verbeek JS, Merkler D, Peipp M, Pinschewer DD. Antibody bivalency improves antiviral efficacy by inhibiting virion release independently of Fc gamma receptors. Cell Rep 2022; 38:110303. [PMID: 35108544 PMCID: PMC8822495 DOI: 10.1016/j.celrep.2022.110303] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2021] [Revised: 12/08/2021] [Accepted: 01/04/2022] [Indexed: 12/17/2022] Open
Abstract
Across the animal kingdom, multivalency discriminates antibodies from all other immunoglobulin superfamily members. The evolutionary forces conserving multivalency above other structural hallmarks of antibodies remain, however, incompletely defined. Here, we engineer monovalent either Fc-competent or -deficient antibody formats to investigate mechanisms of protection of neutralizing antibodies (nAbs) and non-neutralizing antibodies (nnAbs) in virus-infected mice. Antibody bivalency enables the tethering of virions to the infected cell surface, inhibits the release of virions in cell culture, and suppresses viral loads in vivo independently of Fc gamma receptor (FcγR) interactions. In return, monovalent antibody formats either do not inhibit virion release and fail to protect in vivo or their protective efficacy is largely FcγR dependent. Protection in mice correlates with virus-release-inhibiting activity of nAb and nnAb rather than with their neutralizing capacity. These observations provide mechanistic insights into the evolutionary conservation of antibody bivalency and help refining correlates of nnAb protection for vaccine development.
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Affiliation(s)
- Mehmet Sahin
- Department of Biomedicine - Haus Petersplatz, Division of Experimental Virology, University of Basel, 4009 Basel, Switzerland
| | - Melissa M Remy
- Department of Biomedicine - Haus Petersplatz, Division of Experimental Virology, University of Basel, 4009 Basel, Switzerland; Department of Pathology and Immunology, University of Geneva, 1211 Geneva, Switzerland
| | - Benedict Fallet
- Department of Biomedicine - Haus Petersplatz, Division of Experimental Virology, University of Basel, 4009 Basel, Switzerland; Department of Pathology and Immunology, University of Geneva, 1211 Geneva, Switzerland
| | - Rami Sommerstein
- Department of Pathology and Immunology, University of Geneva, 1211 Geneva, Switzerland
| | - Marianna Florova
- Department of Biomedicine - Haus Petersplatz, Division of Experimental Virology, University of Basel, 4009 Basel, Switzerland
| | - Anna Langner
- Division of Stem Cell Transplantation and Immunotherapy, Department of Medicine II, University Hospital Schleswig-Holstein and Christian-Albrechts-University Kiel, Kiel, Germany
| | - Katja Klausz
- Division of Stem Cell Transplantation and Immunotherapy, Department of Medicine II, University Hospital Schleswig-Holstein and Christian-Albrechts-University Kiel, Kiel, Germany
| | - Tobias Straub
- Institute for Immunology, Department for Medical Microbiology and Hygiene, University Medical Center Freiburg, 79104 Freiburg, Germany
| | - Mario Kreutzfeldt
- Department of Pathology and Immunology, Division of Clinical Pathology, University and University Hospital of Geneva, 1211 Geneva, Switzerland
| | - Ingrid Wagner
- Department of Pathology and Immunology, Division of Clinical Pathology, University and University Hospital of Geneva, 1211 Geneva, Switzerland
| | - Cinzia T Schmidt
- BioEM Lab, Center for Cellular Imaging & Nano Analytics, Biozentrum, University of Basel, Basel, Switzerland
| | - Pauline Malinge
- Light Chain Bioscience, Novimmune SA, Plan-les-Ouates, Switzerland
| | | | - Shozo Izui
- Department of Pathology and Immunology, University of Geneva, 1211 Geneva, Switzerland
| | - Hanspeter Pircher
- Institute for Immunology, Department for Medical Microbiology and Hygiene, University Medical Center Freiburg, 79104 Freiburg, Germany
| | - J Sjef Verbeek
- Department of Human Genetics, Leiden University Medical Center, Leiden, the Netherlands; Department of Biomedical Engineering, Toin University of Yokohama, Yokohama, Japan
| | - Doron Merkler
- Department of Pathology and Immunology, Division of Clinical Pathology, University and University Hospital of Geneva, 1211 Geneva, Switzerland
| | - Matthias Peipp
- Division of Stem Cell Transplantation and Immunotherapy, Department of Medicine II, University Hospital Schleswig-Holstein and Christian-Albrechts-University Kiel, Kiel, Germany
| | - Daniel D Pinschewer
- Department of Biomedicine - Haus Petersplatz, Division of Experimental Virology, University of Basel, 4009 Basel, Switzerland; Department of Pathology and Immunology, University of Geneva, 1211 Geneva, Switzerland.
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2
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Wan Z, Zhao Y, Sun Y. Immunoglobulin D and its encoding genes: An updated review. DEVELOPMENTAL AND COMPARATIVE IMMUNOLOGY 2021; 124:104198. [PMID: 34237381 DOI: 10.1016/j.dci.2021.104198] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/11/2020] [Revised: 04/03/2021] [Accepted: 06/30/2021] [Indexed: 06/13/2023]
Abstract
Since the identification of a functional Cδ gene in ostriches, immunoglobulin (Ig) D has been considered to be an extremely evolutionarily conserved Ig isotype besides the IgM found in all classes of jawed vertebrates. However, in contrast to IgM (which remains stable over evolutionary time), IgD shows considerable structural plasticity among vertebrate species and, moreover, its functions are far from elucidated even in humans and mice. Recently, several studies have shown that high expression of the IgD-B-cell receptor (IgD-BCR) may help physiologically autoreactive B cells survive in peripheral lymphoid tissues thanks to unresponsiveness to self-antigens and help their entry into germinal centers to "redeem" autoreactivity via somatic hypermutation. Other studies have demonstrated that secreted IgD may enhance mucosal homeostasis and immunity by linking B cells with basophils to optimize T-helper-2 cell-mediated responses and to constrain IgE-mediated basophil degranulation. Herein, we review the new discoveries on IgD-encoding genes in jawed vertebrates in the past decade. We also highlight advances in the functions of the IgD-BCR and secreted IgD in humans and mice.
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Affiliation(s)
- Zihui Wan
- State Key Laboratory of Agrobiotechnology, College of Biological Sciences, National Engineering Laboratory for Animal Breeding, China Agricultural University, Beijing 100193, People's Republic of China
| | - Yaofeng Zhao
- State Key Laboratory of Agrobiotechnology, College of Biological Sciences, National Engineering Laboratory for Animal Breeding, China Agricultural University, Beijing 100193, People's Republic of China
| | - Yi Sun
- Shandong Provincial Key Laboratory of Animal Biotechnology and Disease Control and Prevention, College of Animal Science and Veterinary Medicine, Shandong Agricultural University, Tai'an 271018, Shandong, People's Republic of China.
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3
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Yoshinaga K, Oshio H, Prasetio B, Hayashida H, Maeda E, Matsumoto M. Four immunoglobulin isotypes and IgD splice variants in urodele amphibians. DEVELOPMENTAL AND COMPARATIVE IMMUNOLOGY 2021; 116:103963. [PMID: 33301796 DOI: 10.1016/j.dci.2020.103963] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/27/2020] [Revised: 11/21/2020] [Accepted: 12/04/2020] [Indexed: 06/12/2023]
Abstract
Until recently, different families of urodele amphibians were thought to express distinct subsets of immunoglobulin (Ig) isotypes. In this study, we explored cDNAs encoding Ig heavy-chains (H-chains) in three species of urodele amphibians. We found that Cynops pyrrhogaster, Pleurodeles waltl, and Ambystoma mexicanum each carry genes encoding four Ig H-chain isotypes, including IgM, IgY, IgD, and IgX, similar to those found in anuran amphibians. We also found that urodele IgDs have a long constant region similar to those found in anuran, reptiles, and bony fishes. We also found several putative IgD splice variants. Our findings indicated that P. waltl IgP is not a novel isotype but an IgD splice variant. Altogether, our findings indicate that IgD splice variants may be universally expressed among amphibian species.
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Affiliation(s)
- Keisuke Yoshinaga
- Department of Biological and Chemical Systems Engineering, National Institute of Technology, Kumamoto College, Hirayama Shin-Machi 2627, Yatsushiro, Kumamoto, 866-8501, Japan.
| | - Hiroto Oshio
- Department of Biological and Chemical Systems Engineering, National Institute of Technology, Kumamoto College, Hirayama Shin-Machi 2627, Yatsushiro, Kumamoto, 866-8501, Japan
| | - Billy Prasetio
- Department of Biological and Chemical Systems Engineering, National Institute of Technology, Kumamoto College, Hirayama Shin-Machi 2627, Yatsushiro, Kumamoto, 866-8501, Japan
| | - Haruka Hayashida
- Department of Biological and Chemical Systems Engineering, National Institute of Technology, Kumamoto College, Hirayama Shin-Machi 2627, Yatsushiro, Kumamoto, 866-8501, Japan
| | - Eriko Maeda
- Department of Biological and Chemical Systems Engineering, National Institute of Technology, Kumamoto College, Hirayama Shin-Machi 2627, Yatsushiro, Kumamoto, 866-8501, Japan
| | - Mizuki Matsumoto
- Department of Biological and Chemical Systems Engineering, National Institute of Technology, Kumamoto College, Hirayama Shin-Machi 2627, Yatsushiro, Kumamoto, 866-8501, Japan
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Liguori B, Alexander A, Wyatt D, Wellehan J, Santoro D. Orchard grass allergy in an African spur-thighed tortoise (Centrochelys sulcata) confirmed via intradermal allergen testing and provocation testing. Vet Dermatol 2020; 31:491-e129. [PMID: 32929832 DOI: 10.1111/vde.12889] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/22/2020] [Indexed: 11/30/2022]
Abstract
The humoral immune system of reptiles is not well-studied. To the best of the authors' knowledge, this case report describes the first case of a type I allergic conjunctivitis associated with orchard grass in an African spur-thighed tortoise (Centrochelys sulcata) supported by intradermal allergen testing and provocative testing. Further studies are needed to better characterize allergic reactions in reptiles.
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Affiliation(s)
- Brittany Liguori
- Department of Comparative Diagnostic and Population Medicine, College of Veterinary Medicine, University of Florida, 2015 SW 16th Avenue, Gainesville, FL, 32610, USA
| | - Amy Alexander
- Department of Comparative Diagnostic and Population Medicine, College of Veterinary Medicine, University of Florida, 2015 SW 16th Avenue, Gainesville, FL, 32610, USA
| | - Danielle Wyatt
- Department of Small Animal Clinical Sciences, College of Veterinary Medicine, University of Florida, 2015 SW 16th Avenue, Gainesville, FL, 32610, USA
| | - James Wellehan
- Department of Comparative Diagnostic and Population Medicine, College of Veterinary Medicine, University of Florida, 2015 SW 16th Avenue, Gainesville, FL, 32610, USA
| | - Domenico Santoro
- Department of Small Animal Clinical Sciences, College of Veterinary Medicine, University of Florida, 2015 SW 16th Avenue, Gainesville, FL, 32610, USA
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Sun Y, Huang T, Hammarström L, Zhao Y. The Immunoglobulins: New Insights, Implications, and Applications. Annu Rev Anim Biosci 2019; 8:145-169. [PMID: 31846352 DOI: 10.1146/annurev-animal-021419-083720] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Immunoglobulins (Igs), as one of the hallmarks of adaptive immunity, first arose approximately 500 million years ago with the emergence of jawed vertebrates. Two events stand out in the evolutionary history of Igs from cartilaginous fish to mammals: (a) the diversification of Ig heavy chain (IgH) genes, resulting in Ig isotypes or subclasses associated with novel functions, and (b) the diversification of genetic and structural strategies, leading to the creation of the antibody repertoire we know today. This review first gives an overview of the IgH isotypes identified in jawed vertebrates to date and then highlights the implications or applications of five new recent discoveries arising from comparative studies of Igs derived from different vertebrate species.
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Affiliation(s)
- Yi Sun
- Shandong Provincial Key Laboratory of Animal Biotechnology and Disease Control and Prevention, College of Animal Science and Veterinary Medicine, Shandong Agricultural University, Tai'an 271018, Shandong, People's Republic of China;
| | - Tian Huang
- Henan Engineering Laboratory for Mammary Bioreactor, School of Life Sciences, Henan University, Kaifeng 475004, Henan, People's Republic of China;
| | - Lennart Hammarström
- Division of Clinical Immunology and Transfusion Medicine, Department of Laboratory Medicine, Karolinska Institutet at Karolinska Hospital Huddinge, Karolinska University Hospital Huddinge, SE-141 86 Stockholm, Sweden;
| | - Yaofeng Zhao
- State Key Laboratory of Agrobiotechnology, College of Biological Sciences, National Engineering Laboratory for Animal Breeding, China Agricultural University, Beijing 100193, People's Republic of China;
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6
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Han B, Li Y, Han H, Zhao Y, Pan Q, Ren L. Three IgH isotypes, IgM, IgA and IgY are expressed in Gentoo penguin and zebra finch. PLoS One 2017; 12:e0173334. [PMID: 28403146 PMCID: PMC5389807 DOI: 10.1371/journal.pone.0173334] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2016] [Accepted: 02/20/2017] [Indexed: 12/05/2022] Open
Abstract
Previous studies on a limited number of birds suggested that the IgD-encoding gene was absent in birds. However, one of our recent studies showed that the gene was definitely expressed in the ostrich and emu. Interestingly, we also identified subclass diversification of IgM and IgY in these two birds. To better understand immunoglobulin genes in birds, in this study, we analyzed the immunoglobulin heavy chain genes in the zebra finch (Taeniopygia guttata) and Gentoo penguin (Pygoscelis papua), belonging respectively to the order Passeriformes, the most successful bird order in terms of species diversity and numbers, and Sphenisciformes, a relatively primitive avian order. Similar to the results obtained in chickens and ducks, only three genes encoding immunoglobulin heavy chain isotypes, IgM, IgA and IgY, were identified in both species. Besides, we detected a transcript encoding a short membrane-bound IgA lacking the last two CH exons in the Gentoo penguin. We did not find any evidence supporting the presence of IgD gene or subclass diversification of IgM/IgY in penguin or zebra finch. The obtained data in our study provide more insights into the immunoglobulin heavy chain genes in birds and may help to better understand the evolution of immunoglobulin genes in tetrapods.
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Affiliation(s)
- Binyue Han
- State Key Laboratory for Agrobiotechnology, China Agricultural University, Beijing, P. R. China
| | - Yan Li
- Key Laboratory of Animal Reproduction and Germplasm Enhancement in Universities of Shandong, Qingdao Agricultural University, Qingdao, P. R. China
| | - Haitang Han
- State Key Laboratory for Agrobiotechnology, China Agricultural University, Beijing, P. R. China
| | - Yaofeng Zhao
- State Key Laboratory for Agrobiotechnology, China Agricultural University, Beijing, P. R. China
| | - Qingjie Pan
- Key Laboratory of Animal Reproduction and Germplasm Enhancement in Universities of Shandong, Qingdao Agricultural University, Qingdao, P. R. China
- * E-mail: (LR); (QP)
| | - Liming Ren
- State Key Laboratory for Agrobiotechnology, China Agricultural University, Beijing, P. R. China
- * E-mail: (LR); (QP)
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Generation of Anti-Boa Immunoglobulin Antibodies for Serodiagnostic Applications, and Their Use to Detect Anti-Reptarenavirus Antibodies in Boa Constrictor. PLoS One 2016; 11:e0158417. [PMID: 27355360 PMCID: PMC4927170 DOI: 10.1371/journal.pone.0158417] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2016] [Accepted: 06/15/2016] [Indexed: 11/19/2022] Open
Abstract
Immunoglobulins (Igs), the key effectors of the adaptive immune system, mediate the specific recognition of foreign structures, i.e. antigens. In mammals, IgM production commonly precedes the production of IgG in the response to an infection. The reptilian counterpart of IgG is IgY, but the exact kinetics of the reptilian immune response are less well known. Boid inclusion body disease (BIBD), an often fatal disease of captive boas and pythons has been linked to reptarenavirus infection, and BIBD is believed to be immunosuppressive. However, so far, the study of the serological response towards reptarenaviruses in BIBD has been hampered by the lack of reagents. Thus we set up a purification protocol for boa constrictor IgY and IgM, which should also be applicable for other snake species. We used centrifugal filter units, poly ethylene glycol precipitation and gel permeation chromatography to purify and separate the IgM and IgY fractions from boa constrictor serum, which we further used to immunise rabbits. We affinity purified IgM and IgY specific reagents from the produced antiserum, and labelled the reagents with horseradish peroxidase. Finally, using the sera of snakes with known exposure to reptarenaviruses we demonstrated that the newly generated reagents can be utilised for serodiagnostic purposes, such as immunoblotting and immunofluorescent staining. To our knowledge, this is the first report to show reptarenavirus-specific antibodies in boa constrictors.
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8
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Han B, Yuan H, Wang T, Li B, Ma L, Yu S, Huang T, Li Y, Fang D, Chen X, Wang Y, Qiu S, Guo Y, Fei J, Ren L, Pan-Hammarström Q, Hammarström L, Wang J, Wang J, Hou Y, Pan Q, Xu X, Zhao Y. Multiple IgH Isotypes Including IgD, Subclasses of IgM, and IgY Are Expressed in the Common Ancestors of Modern Birds. THE JOURNAL OF IMMUNOLOGY 2016; 196:5138-47. [PMID: 27183632 DOI: 10.4049/jimmunol.1600307] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/22/2016] [Accepted: 04/14/2016] [Indexed: 12/23/2022]
Abstract
Although evolutionarily just as ancient as IgM, it has been thought for many years that IgD is not present in birds. Based on the recently sequenced genomes of 48 bird species as well as high-throughput transcriptome sequencing of immune-related tissues, we demonstrate in this work that the ostrich (Struthio camelus) possesses a functional δ gene that encodes a membrane-bound IgD H chain with seven CH domains. Furthermore, δ sequences were clearly identified in many other bird species, demonstrating that the δ gene is widely distributed among birds and is only absent in certain bird species. We also show that the ostrich possesses two μ genes (μ1, μ2) and two υ genes (υ1, υ2), in addition to the δ and α genes. Phylogenetic analyses suggest that subclass diversification of both the μ and υ genes occurred during the early stages of bird evolution, after their divergence from nonavian reptiles. Although the positions of the two υ genes are unknown, physical mapping showed that the remaining genes are organized in the order μ1-δ-α-μ2, with the α gene being inverted relative to the others. Together with previous studies, our data suggest that birds and nonavian reptile species most likely shared a common ancestral IgH gene locus containing a δ gene and an inverted α gene. The δ gene was then evolutionarily lost in selected birds, whereas the α gene lost in selected nonavian reptiles. The data obtained in this study provide significant insights into the understanding of IgH gene evolution in tetrapods.
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Affiliation(s)
- Binyue Han
- State Key Laboratory for Agrobiotechnology, China Agricultural University, Beijing 100193, People's Republic of China
| | - Hui Yuan
- BGI-Shenzhen, Shenzhen 518083, People's Republic of China; College of Animal Science and Technology, Northeast Agricultural University, Harbin 150030, People's Republic of China
| | - Tao Wang
- State Key Laboratory for Agrobiotechnology, China Agricultural University, Beijing 100193, People's Republic of China
| | - Bo Li
- BGI-Shenzhen, Shenzhen 518083, People's Republic of China
| | - Li Ma
- State Key Laboratory for Agrobiotechnology, China Agricultural University, Beijing 100193, People's Republic of China
| | - Shuyang Yu
- State Key Laboratory for Agrobiotechnology, China Agricultural University, Beijing 100193, People's Republic of China
| | - Tian Huang
- School of Life Science, Henan University, Kaifeng 475004, People's Republic of China
| | - Yan Li
- Key Laboratory of Animal Reproduction and Germplasm Enhancement in Universities of Shandong, Qingdao Agricultural University, Qingdao 266109, People's Republic of China; and
| | - Dongming Fang
- BGI-Shenzhen, Shenzhen 518083, People's Republic of China
| | - Xiaoli Chen
- BGI-Shenzhen, Shenzhen 518083, People's Republic of China
| | - Yongsi Wang
- BGI-Shenzhen, Shenzhen 518083, People's Republic of China
| | - Si Qiu
- BGI-Shenzhen, Shenzhen 518083, People's Republic of China
| | - Ying Guo
- State Key Laboratory for Agrobiotechnology, China Agricultural University, Beijing 100193, People's Republic of China
| | - Jing Fei
- State Key Laboratory for Agrobiotechnology, China Agricultural University, Beijing 100193, People's Republic of China
| | - Liming Ren
- State Key Laboratory for Agrobiotechnology, China Agricultural University, Beijing 100193, People's Republic of China
| | - Qiang Pan-Hammarström
- Division of Clinical Immunology, Department of Laboratory Medicine, Karolinska University Hospital Huddinge, SE-141 86, Stockholm, Sweden
| | - Lennart Hammarström
- Division of Clinical Immunology, Department of Laboratory Medicine, Karolinska University Hospital Huddinge, SE-141 86, Stockholm, Sweden
| | - Jun Wang
- BGI-Shenzhen, Shenzhen 518083, People's Republic of China
| | - Jian Wang
- BGI-Shenzhen, Shenzhen 518083, People's Republic of China
| | - Yong Hou
- BGI-Shenzhen, Shenzhen 518083, People's Republic of China
| | - Qingjie Pan
- Key Laboratory of Animal Reproduction and Germplasm Enhancement in Universities of Shandong, Qingdao Agricultural University, Qingdao 266109, People's Republic of China; and
| | - Xun Xu
- BGI-Shenzhen, Shenzhen 518083, People's Republic of China;
| | - Yaofeng Zhao
- State Key Laboratory for Agrobiotechnology, China Agricultural University, Beijing 100193, People's Republic of China;
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Olivieri DN, Garet E, Estevez O, Sánchez-Espinel C, Gambón-Deza F. Genomic structure and expression of immunoglobulins in Squamata. Mol Immunol 2016; 72:81-91. [DOI: 10.1016/j.molimm.2016.03.003] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2016] [Revised: 02/24/2016] [Accepted: 03/02/2016] [Indexed: 11/24/2022]
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A Comprehensive Analysis of the Phylogeny, Genomic Organization and Expression of Immunoglobulin Light Chain Genes in Alligator sinensis, an Endangered Reptile Species. PLoS One 2016; 11:e0147704. [PMID: 26901135 PMCID: PMC4762898 DOI: 10.1371/journal.pone.0147704] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2015] [Accepted: 01/07/2016] [Indexed: 12/02/2022] Open
Abstract
Crocodilians are evolutionarily distinct reptiles that are distantly related to lizards and are thought to be the closest relatives of birds. Compared with birds and mammals, few studies have investigated the Ig light chain of crocodilians. Here, employing an Alligator sinensis genomic bacterial artificial chromosome (BAC) library and available genome data, we characterized the genomic organization of the Alligator sinensis IgL gene loci. The Alligator sinensis has two IgL isotypes, λ and κ, the same as Anolis carolinensis. The Igλ locus contains 6 Cλ genes, each preceded by a Jλ gene, and 86 potentially functional Vλ genes upstream of (Jλ-Cλ)n. The Igκ locus contains a single Cκ gene, 6 Jκs and 62 functional Vκs. All VL genes are classified into a total of 31 families: 19 Vλ families and 12 Vκ families. Based on an analysis of the chromosomal location of the light chain genes among mammals, birds, lizards and frogs, the data further confirm that there are two IgL isotypes in the Alligator sinensis: Igλ and Igκ. By analyzing the cloned Igλ/κ cDNA, we identified a biased usage pattern of V families in the expressed Vλ and Vκ. An analysis of the junctions of the recombined VJ revealed the presence of N and P nucleotides in both expressed λ and κ sequences. Phylogenetic analysis of the V genes revealed V families shared by mammals, birds, reptiles and Xenopus, suggesting that these conserved V families are orthologous and have been retained during the evolution of IgL. Our data suggest that the Alligator sinensis IgL gene repertoire is highly diverse and complex and provide insight into immunoglobulin gene evolution in vertebrates.
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Estevez O, Garet E, Olivieri D, Gambón-Deza F. Amphibians have immunoglobulins similar to ancestral IgD and IgA from Amniotes. Mol Immunol 2016; 69:52-61. [DOI: 10.1016/j.molimm.2015.11.005] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2015] [Revised: 11/06/2015] [Accepted: 11/11/2015] [Indexed: 01/03/2023]
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12
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Zhu R, Chen ZY, Wang J, Yuan JD, Liao XY, Gui JF, Zhang QY. Thymus cDNA library survey uncovers novel features of immune molecules in Chinese giant salamander Andrias davidianus. DEVELOPMENTAL AND COMPARATIVE IMMUNOLOGY 2014; 46:413-422. [PMID: 24909429 DOI: 10.1016/j.dci.2014.05.019] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/10/2014] [Revised: 05/29/2014] [Accepted: 05/30/2014] [Indexed: 06/03/2023]
Abstract
A ranavirus-induced thymus cDNA library was constructed from Chinese giant salamander, the largest extant amphibian species. Among the 137 putative immune-related genes derived from this library, these molecules received particular focus: immunoglobulin heavy chains (IgM, IgD, and IgY), IFN-inducible protein 6 (IFI6), and T cell receptor beta chain (TCRβ). Several unusual features were uncovered: IgD displays a structure pattern distinct from those described for other amphibians by having only four constant domains plus a hinge region. A unique IgY form (IgY(ΔFc)), previously undescribed in amphibians, is present in serum. Alternative splicing is observed to generate IgH diversification. IFI6 is newly-identified in amphibians, which occurs in two forms divergent in subcelluar distribution and antiviral activity. TCRβ immunoscope profile follows the typical vertebrate pattern, implying a polyclonal T cell repertoire. Collectively, the pioneering survey of ranavirus-induced thymus cDNA library from Chinese giant salamander reveals immune components and characteristics in this primitive amphibian.
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Affiliation(s)
- Rong Zhu
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China
| | - Zhong-Yuan Chen
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China
| | - Jun Wang
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China
| | - Jiang-Di Yuan
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China
| | - Xiang-Yong Liao
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China
| | - Jian-Fang Gui
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China
| | - Qi-Ya Zhang
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China.
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Zhu L, Yan Z, Feng M, Peng D, Guo Y, Hu X, Ren L, Sun Y. Identification of sturgeon IgD bridges the evolutionary gap between elasmobranchs and teleosts. DEVELOPMENTAL AND COMPARATIVE IMMUNOLOGY 2014; 42:138-147. [PMID: 24001581 DOI: 10.1016/j.dci.2013.08.020] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/02/2013] [Revised: 08/22/2013] [Accepted: 08/24/2013] [Indexed: 06/02/2023]
Abstract
IgD has been found in almost all jawed vertebrates, including cartilaginous and teleost fish. However, IgD is missing in acipenseriformes, a branch that is evolutionarily positioned between elasmobranchs and teleost fish. Here, by analyzing transcriptome data, we identified a transcriptionally active IgD-encoding gene in the Siberian sturgeon (Acipenser baerii). Phylogenetic analysis indicated that it is orthologous to mammalian IgD and closely related to the IgD of other fish. The lengths of sturgeon membrane-bound IgD transcripts ranged from 1.2kb to 6.2kb, encoding 3-19 CH domains. As in teleosts, the first CH domain of the sturgeon IgD transcript is also derived from μCH1 by RNA splicing. However, the variable region of the expressed sturgeon IgD shows limited V(D)J usage. In addition to IgD, three IgM variants were also identified in this species, whereas no IgT/Z-encoding genes were observed. This study bridges the gap in Ig evolution between elasmobranchs and teleosts and provides significant insight into the early evolution of immunoglobulins.
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Affiliation(s)
- Lin Zhu
- State Key Laboratory of Agrobiotechnology, College of Biological Sciences, National Engineering Laboratory for Animal Breeding, China Agricultural University, Beijing 100193, PR China
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Magadán-Mompó S, Sánchez-Espinel C, Gambón-Deza F. IgH loci of American alligator and saltwater crocodile shed light on IgA evolution. Immunogenetics 2013; 65:531-41. [PMID: 23558556 DOI: 10.1007/s00251-013-0692-y] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2012] [Accepted: 03/01/2013] [Indexed: 11/26/2022]
Abstract
Immunoglobulin loci of two representatives of the order Crocodylia were studied from full genome sequences. Both Alligator mississippiensis and Crocodylus porosus have 13 genes for the heavy chain constant regions of immunoglobulins. The IGHC locus contains genes encoding four immunoglobulins M (IgM), one immunoglobulin D (IgD), three immunoglobulins A (IgA), three immunoglobulins Y (IgY), and two immunoglobulins D2 (IgD2). IgA and IgD2 genes were found in reverse transcriptional orientation compared to the other Ig genes. The IGHD gene contains 11 exons, four of which containing stop codons or sequence alterations. As described in other reptiles, the IgD2 is a chimeric Ig with IgA- and IgD-related domains. This work clarifies the origin of bird IgA and its evolutionary relationship with amphibian immunoglobulin X (IgX) as well as their links with mammalian IgA.
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Affiliation(s)
- Susana Magadán-Mompó
- Oceanographic Center of Vigo, Spanish Institute of Oceanography-IEO, Subida a Radio Faro 50, 36390 Vigo, Pontevedra, Spain
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