1
|
Crawford G, Hayes MD, Seoane RC, Ward S, Dalessandri T, Lai C, Healy E, Kipling D, Proby C, Moyes C, Green K, Best K, Haniffa M, Botto M, Dunn-Walters D, Strid J. Epithelial damage and tissue γδ T cells promote a unique tumor-protective IgE response. Nat Immunol 2018; 19:859-870. [PMID: 30013146 PMCID: PMC6071860 DOI: 10.1038/s41590-018-0161-8] [Citation(s) in RCA: 87] [Impact Index Per Article: 14.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2017] [Accepted: 06/12/2018] [Indexed: 01/09/2023]
Abstract
IgE is an ancient and conserved immunoglobulin isotype with potent immunological function. Nevertheless, the regulation of IgE responses remains an enigma, and evidence of a role for IgE in host defense is limited. Here we report that topical exposure to a common environmental DNA-damaging xenobiotic initiated stress surveillance by γδTCR+ intraepithelial lymphocytes that resulted in class switching to IgE in B cells and the accumulation of autoreactive IgE. High-throughput antibody sequencing revealed that γδ T cells shaped the IgE repertoire by supporting specific variable-diversity-joining (VDJ) rearrangements with unique characteristics of the complementarity-determining region CDRH3. This endogenous IgE response, via the IgE receptor FcεRI, provided protection against epithelial carcinogenesis, and expression of the gene encoding FcεRI in human squamous-cell carcinoma correlated with good disease prognosis. These data indicate a joint role for immunosurveillance by T cells and by B cells in epithelial tissues and suggest that IgE is part of the host defense against epithelial damage and tumor development.
Collapse
MESH Headings
- Animals
- Anthracenes/toxicity
- B-Lymphocytes/physiology
- Carcinoma, Squamous Cell/diagnosis
- Carcinoma, Squamous Cell/immunology
- Cell Death
- Cells, Cultured
- Complementarity Determining Regions/genetics
- DNA Damage
- Epithelial Cells/physiology
- Female
- High-Throughput Nucleotide Sequencing
- Immunoglobulin Class Switching
- Immunoglobulin E/genetics
- Immunoglobulin E/metabolism
- Immunologic Surveillance
- Intraepithelial Lymphocytes/physiology
- Mice
- Mice, Inbred C57BL
- Mice, Knockout
- Neoplasms, Experimental/chemically induced
- Neoplasms, Experimental/immunology
- Piperidines/toxicity
- Prognosis
- Receptors, Antigen, T-Cell, gamma-delta/genetics
- Receptors, Antigen, T-Cell, gamma-delta/metabolism
- Receptors, IgE/metabolism
Collapse
Affiliation(s)
- Greg Crawford
- Department of Medicine, Imperial College London, London, UK
| | | | | | - Sophie Ward
- Department of Medicine, Imperial College London, London, UK
| | | | - Chester Lai
- Dermatopharmacology, Clinical and Experimental Sciences, Faculty of Medicine, University of Southampton, Southampton, United Kingdom; Dermatology, University Hospital Southampton NHS Foundation Trust, Southampton, UK
| | - Eugene Healy
- Dermatopharmacology, Clinical and Experimental Sciences, Faculty of Medicine, University of Southampton, Southampton, United Kingdom; Dermatology, University Hospital Southampton NHS Foundation Trust, Southampton, UK
| | - David Kipling
- Division of Cancer and Genetics, School of Medicine, Cardiff University, Cardiff, UK
| | - Charlotte Proby
- Division of Cancer Research, School of Medicine, University of Dundee, Ninewells Hospital & Medical School, Dundee, UK
| | - Colin Moyes
- Department of Pathology, Greater Glasgow and Clyde NHS, Queen Elizabeth University Hospital, Glasgow, UK
| | - Kile Green
- Institute of Cellular Medicine, Newcastle University, Newcastle upon Tyne, UK
| | - Katie Best
- Institute of Cellular Medicine, Newcastle University, Newcastle upon Tyne, UK
- Department of Dermatology and Newcastle Biomedical Research Centre, Royal Victoria Infirmary, Newcastle Hospitals NHS Foundation Trust, Newcastle upon Tyne, UK
| | - Muzlifah Haniffa
- Institute of Cellular Medicine, Newcastle University, Newcastle upon Tyne, UK
- Department of Dermatology and Newcastle Biomedical Research Centre, Royal Victoria Infirmary, Newcastle Hospitals NHS Foundation Trust, Newcastle upon Tyne, UK
| | - Marina Botto
- Department of Medicine, Imperial College London, London, UK
| | - Deborah Dunn-Walters
- Faculty of Health and Medical Sciences, School of Biosciences and Medicine, University of Surrey, Guildford, Surrey, UK
| | - Jessica Strid
- Department of Medicine, Imperial College London, London, UK.
| |
Collapse
|
2
|
Thyagarajan R, Banday V, Ding Z, Lejon K. Contribution of autoallergy to the pathogenesis in the NOD mice. Autoimmunity 2015; 48:298-304. [PMID: 25707684 DOI: 10.3109/08916934.2015.1016220] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
The immunoglobulin isotype IgE is commonly associated with allergy. However, its involvement in autoimmune disease in general, and Type 1 diabetes (T1D) in particular, is still not completely clarified, nonetheless IgE has been observed in patients with T1D. In this article, we aimed to elucidate the contribution of IgE in the pathogenesis of the disease in a spontaneous model for T1D, i.e. the NOD mouse. We observed increased levels of IgE in splenic, lymph node and peripheral blood B cells in the NOD mice compared to the control C57BL/6 (B6) mice. No correlation was found between the IgE levels on B cells and those in the sera of these mice, indicating a B cell intrinsic property mediating IgE capture in NOD. Functionally, the B cells from NOD were similar to B6 in rescuing the IgE-mediated immune response via the low affinity receptor CD23 in a transgenic adoptive transfer system. However, the involvement of IgE in diabetes development was clearly demonstrated, as treatment with anti-IgE antibodies delayed the incidence of the diabetes in the NOD mice compared to the PBS treated group. Pancreas sections from a 13-week-old NOD revealed the presence of tertiary lymphoid structures with T cells, B cells, germinal centers and IgE suggesting the presence of autoantigen specific IgE. Our study provides an insight to the commonly overlooked immunoglobulin IgE and its potential role in autoimmunity.
Collapse
Affiliation(s)
- Radha Thyagarajan
- Department of Clinical Microbiology, Division of Immunology, Umeå University , Umeå , Sweden and
| | | | | | | |
Collapse
|
3
|
Rogosch T, Kerzel S, Dey F, Wagner JJ, Zhang Z, Maier RF, Zemlin M. IgG4 and IgE transcripts in childhood allergic asthma reflect divergent antigen-driven selection. THE JOURNAL OF IMMUNOLOGY 2014; 193:5801-8. [PMID: 25385824 DOI: 10.4049/jimmunol.1401409] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
The physiologic function of the "odd" Ab IgG4 remains enigmatic. IgG4 mediates immunotolerance, as, for example, during specific immunotherapy of allergies, but it mediates tissue damage in autoimmune pemphigus vulgaris and "IgG4-related disease." Approximately half of the circulating IgG4 molecules are bispecific owing to their unique ability to exchange half-molecules. Better understanding of the interrelation between IgG4 and IgE repertoires may yield insight into the pathogenesis of allergies and into potential novel therapies that modulate IgG4 responses. We aimed to compare the selective forces that forge the IgG4 and IgE repertoires in allergic asthma. Using an IgG4-specific RT-PCR, we amplified, cloned, and sequenced IgG4 H chain transcripts of PBMCs from 10 children with allergic asthma. We obtained 558 functional IgG4 sequences, of which 286 were unique. Compared with previously published unique IgE transcripts from the same blood samples, the somatic mutation rate was significantly enhanced in IgG4 transcripts (62 versus 83%; p < 0.001), whereas fewer IgG4 sequences displayed statistical evidence of Ag-driven selection (p < 0.001). On average, the hypervariable CDRH3 region was four nucleotides shorter in IgG4 than in IgE transcripts (p < 0.001). IgG4 transcripts in the circulation of children with allergic asthma reflect some characteristics of classical Ag-driven B2 immune responses but display less indication of Ag selection than do IgE transcripts. Although allergen-specific IgG4 can block IgE-mediated allergen presentation and degranulation of mast cells, key factors that influence the Ag-binding properties of the Ab differ between the overall repertoires of circulating IgG4- and IgE-expressing cells.
Collapse
Affiliation(s)
- Tobias Rogosch
- Department of Pediatrics, Philipps-University Marburg, D-35033 Marburg, Germany
| | - Sebastian Kerzel
- Department of Pediatric Pneumology and Allergy, University Children's Hospital Regensburg, St. Hedwig Campus, 93053 Regensburg, Germany; and
| | - Friederike Dey
- Department of Pediatrics, Philipps-University Marburg, D-35033 Marburg, Germany
| | | | - Zhixin Zhang
- Department of Pathology and Microbiology, Eppley Institute for Research in Cancer, University of Nebraska Medical Center, Omaha, NE 68198
| | - Rolf F Maier
- Department of Pediatrics, Philipps-University Marburg, D-35033 Marburg, Germany
| | - Michael Zemlin
- Department of Pediatrics, Philipps-University Marburg, D-35033 Marburg, Germany;
| |
Collapse
|
4
|
Wu LC, Zarrin AA. The production and regulation of IgE by the immune system. Nat Rev Immunol 2014; 14:247-59. [PMID: 24625841 DOI: 10.1038/nri3632] [Citation(s) in RCA: 184] [Impact Index Per Article: 18.4] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
IgE not only provides protective immunity against helminth parasites but can also mediate the type I hypersensitivity reactions that contribute to the pathogenesis of allergic diseases such as asthma, allergic rhinitis and atopic dermatitis. Despite the importance of IgE in immune biology and allergic pathogenesis, the cells and the pathways that produce and regulate IgE are poorly understood. In this Review, we summarize recent advances in our understanding of the production and the regulation of IgE in vivo, as revealed by studies in mice, and we discuss how these findings compare to what is known about human IgE biology.
Collapse
Affiliation(s)
- Lawren C Wu
- Department of Immunology, Genentech Inc., 1 DNA Way, South San Francisco, California 94080, USA
| | - Ali A Zarrin
- Department of Immunology, Genentech Inc., 1 DNA Way, South San Francisco, California 94080, USA
| |
Collapse
|
5
|
Komegae EN, Grund LZ, Lopes-Ferreira M, Lima C. The longevity of Th2 humoral response induced by proteases natterins requires the participation of long-lasting innate-like B cells and plasma cells in spleen. PLoS One 2013; 8:e67135. [PMID: 23840604 PMCID: PMC3696013 DOI: 10.1371/journal.pone.0067135] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2012] [Accepted: 05/16/2013] [Indexed: 11/22/2022] Open
Abstract
The generation of long-lived antibody-secreting cells (ASC) and memory B cells are critical events for an effective vaccine and the choice of adjuvant can influence these processes. Various cellular and molecular mechanism involved in the protease action that determine Th2 responses have been identified. However, direct or indirect actions in the regulation of the induction, survival and longevity of ASC in differential compartments remain largely unknown. We investigated whether the proteolytic activity of proteins are determinant for the modulation of the memory immune response in mice, promoting the differentiation of memory B cells to terminally differentiated end stage cells. Here, we show that the proteolytic activity of Natterins, from the venom of Thalassophryne nattereri Brazilian fish, besides inducing a Th2 response with plasmatic titers of high-affinity antigen-specific IgE over extended periods is sufficient for the generation of signals that contribute to the formation of a survival niche in the spleen, essential for the longevity of the main subtype of ASC with B220neg phenotype.
Collapse
Affiliation(s)
- Evilin Naname Komegae
- Immunoregulation Unit, Special Laboratory of Applied Toxinology, Butantan Institute, São Paulo, Brazil
- Department of Immunology, University of São Paulo, São Paulo, Brazil
| | - Lidiane Zito Grund
- Immunoregulation Unit, Special Laboratory of Applied Toxinology, Butantan Institute, São Paulo, Brazil
- Department of Immunology, University of São Paulo, São Paulo, Brazil
| | - Monica Lopes-Ferreira
- Immunoregulation Unit, Special Laboratory of Applied Toxinology, Butantan Institute, São Paulo, Brazil
- Department of Immunology, University of São Paulo, São Paulo, Brazil
| | - Carla Lima
- Immunoregulation Unit, Special Laboratory of Applied Toxinology, Butantan Institute, São Paulo, Brazil
- Department of Immunology, University of São Paulo, São Paulo, Brazil
- * E-mail:
| |
Collapse
|
6
|
Huang L, Lange MD, Yu Y, Li S, Su K, Zhang Z. Contribution of V(H) replacement products in mouse antibody repertoire. PLoS One 2013; 8:e57877. [PMID: 23469094 PMCID: PMC3585286 DOI: 10.1371/journal.pone.0057877] [Citation(s) in RCA: 10] [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: 06/13/2012] [Accepted: 01/30/2013] [Indexed: 11/19/2022] Open
Abstract
VH replacement occurs through RAG-mediated recombination between the cryptic recombination signal sequence (cRSS) near the 3′ end of a rearranged VH gene and the 23-bp RSS from an upstream unrearranged VH gene. Due to the location of the cRSS, VH replacement leaves a short stretch of nucleotides from the previously rearranged VH gene at the newly formed V-D junction, which can be used as a marker to identify VH replacement products. To determine the contribution of VH replacement products to mouse antibody repertoire, we developed a Java-based VH Replacement Footprint Analyzer (VHRFA) program and analyzed 17,179 mouse IgH gene sequences from the NCBI database to identify VH replacement products. The overall frequency of VH replacement products in these IgH genes is 5.29% based on the identification of pentameric VH replacement footprints at their V-D junctions. The identified VH replacement products are distributed similarly in IgH genes using most families of VH genes, although different families of VH genes are used differentially. The frequencies of VH replacement products are significantly elevated in IgH genes derived from several strains of autoimmune prone mice and in IgH genes encoding autoantibodies. Moreover, the identified VH replacement footprints in IgH genes from autoimmune prone mice or IgH genes encoding autoantibodies preferentially encode positively charged amino acids. These results revealed a significant contribution of VH replacement products to the diversification of antibody repertoire and potentially, to the generation of autoantibodies in mice.
Collapse
Affiliation(s)
- Lin Huang
- Department of Pathology and Microbiology, University of Nebraska Medical Center, Omaha, Nebraska, United States of America
| | - Miles D. Lange
- Department of Pathology and Microbiology, University of Nebraska Medical Center, Omaha, Nebraska, United States of America
| | - Yangsheng Yu
- Department of Pathology and Microbiology, University of Nebraska Medical Center, Omaha, Nebraska, United States of America
| | - Song Li
- Department of Pathology and Microbiology, University of Nebraska Medical Center, Omaha, Nebraska, United States of America
| | - Kaihong Su
- Department of Pathology and Microbiology, University of Nebraska Medical Center, Omaha, Nebraska, United States of America
- The Eppley Cancer Institute, University of Nebraska Medical Center, Omaha, Nebraska, United States of America
- Department of Internal Medicine, University of Nebraska Medical Center, Omaha, Nebraska, United States of America
| | - Zhixin Zhang
- Department of Pathology and Microbiology, University of Nebraska Medical Center, Omaha, Nebraska, United States of America
- The Eppley Cancer Institute, University of Nebraska Medical Center, Omaha, Nebraska, United States of America
- * E-mail:
| |
Collapse
|
7
|
Rogosch T, Kerzel S, Hoss K, Hoersch G, Zemlin C, Heckmann M, Berek C, Schroeder HW, Maier RF, Zemlin M. IgA response in preterm neonates shows little evidence of antigen-driven selection. THE JOURNAL OF IMMUNOLOGY 2012; 189:5449-56. [PMID: 23105134 DOI: 10.4049/jimmunol.1103347] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
After birth, contact to environmental Ags induces the production of IgA, which represents a first line of defense for the neonate. We sought to characterize the maturation of the repertoire of IgA H chain transcripts in circulating blood B cells during human ontogeny. We found that IgA H chain transcripts were present in cord blood as early as 27 wk of gestation and that the restrictions of the primary Ab repertoire (IgM) persisted in the IgA repertoire. Thus, B cells harboring more "mature" V(H) regions were not preferred for class switch to IgA. Preterm and term neonates expressed a unique IgA repertoire, which was characterized by short CDR-H3 regions, preference of the J(H) proximal D(H)7-27 gene segment, and very few somatic mutations. During the first postnatal months, these restrictions were slowly released. Preterm birth did not measurably accelerate the maturation of the IgA repertoire. At a postconceptional age of 60 wk, somatic mutation frequency of IgA H chain transcripts reached 25% of the adult values but still showed little evidence of Ag-driven selection. These results indicate that similar to IgG, the IgA repertoire expands in a controlled manner after birth. Thus, the IgA repertoire of the newborn has distinctive characteristics that differ from the adult IgA repertoire. These observations might explain the lower affinity and specificity of neonatal IgA Abs, which could contribute to a higher susceptibility to infections and altered responses to vaccinations, but might also prevent the development of autoimmune and allergic diseases.
Collapse
Affiliation(s)
- Tobias Rogosch
- Department of Pediatrics, Philipps University Marburg, 35033 Marburg, Germany
| | | | | | | | | | | | | | | | | | | |
Collapse
|
8
|
Rogosch T, Kerzel S, Hoi KH, Zhang Z, Maier RF, Ippolito GC, Zemlin M. Immunoglobulin analysis tool: a novel tool for the analysis of human and mouse heavy and light chain transcripts. Front Immunol 2012; 3:176. [PMID: 22754554 PMCID: PMC3384897 DOI: 10.3389/fimmu.2012.00176] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2012] [Accepted: 06/10/2012] [Indexed: 11/15/2022] Open
Abstract
Sequence analysis of immunoglobulin (Ig) heavy and light chain transcripts can refine categorization of B cell subpopulations and can shed light on the selective forces that act during immune responses or immune dysregulation, such as autoimmunity, allergy, and B cell malignancy. High-throughput sequencing yields Ig transcript collections of unprecedented size. The authoritative web-based IMGT/HighV-QUEST program is capable of analyzing large collections of transcripts and provides annotated output files to describe many key properties of Ig transcripts. However, additional processing of these flat files is required to create figures, or to facilitate analysis of additional features and comparisons between sequence sets. We present an easy-to-use Microsoft® Excel® based software, named Immunoglobulin Analysis Tool (IgAT), for the summary, interrogation, and further processing of IMGT/HighV-QUEST output files. IgAT generates descriptive statistics and high-quality figures for collections of murine or human Ig heavy or light chain transcripts ranging from 1 to 150,000 sequences. In addition to traditionally studied properties of Ig transcripts – such as the usage of germline gene segments, or the length and composition of the CDR-3 region – IgAT also uses published algorithms to calculate the probability of antigen selection based on somatic mutational patterns, the average hydrophobicity of the antigen-binding sites, and predictable structural properties of the CDR-H3 loop according to Shirai’s H3-rules. These refined analyses provide in-depth information about the selective forces acting upon Ig repertoires and allow the statistical and graphical comparison of two or more sequence sets. IgAT is easy to use on any computer running Excel® 2003 or higher. Thus, IgAT is a useful tool to gain insights into the selective forces and functional properties of small to extremely large collections of Ig transcripts, thereby assisting a researcher to mine a data set to its fullest.
Collapse
Affiliation(s)
- Tobias Rogosch
- Department of Pediatrics, Philipps-University Marburg Marburg, Germany
| | | | | | | | | | | | | |
Collapse
|
9
|
IL-5 and IL-17A are critical for the chronic IgE response and differentiation of long-lived antibody-secreting cells in inflamed tissues. Cytokine 2012; 59:335-51. [PMID: 22633287 DOI: 10.1016/j.cyto.2012.04.045] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2011] [Revised: 03/14/2012] [Accepted: 04/25/2012] [Indexed: 12/21/2022]
Abstract
Prolonged survival of long-lived antibody-secreting cells in the BM has been implicated as a key component of long-term humoral immunity. The current study was designed to uncover the extrinsic signals required for the generation and maintenance of ASC in several niches (peritoneum, spleen and bone-marrow). Our results show that protein mixture of the Thalassophryne nattereri venom induced a chronic Th2 humoral response that is characterized by splenic hyperplasia with GC formation and venom retention by follicular DCs. Retention of B1a in the BM were observed. In the late phase (120d) of chronic venom-response the largest pool of ASC into the peritoneal cavity consisted of B220(neg)CD43(high) phenotype; the largest pool of ASC into spleen was constituted by B220 positive cells (B220(high) and B220(low)), whereas the largest pool of ASC into in the BM was constituted by the B220(high)CD43(low) phenotype; and finally, terminally differentiated cells (B220(neg)CD43(high)) were only maintained in the inflamed peritoneal cavity in late phase. After 120d a sustained production of cytokines (KC, IL-5, TNF-α, IL-6, IL-17A and IL-23) and leukocytes recruitment (eosinophils, mast cells, and neutrophils) were induced. IL-5- and IL-17A-producing CD4+ CD44+ CD40L+ Ly6C+ effector memory T cells were also observed in peritoneal cavity. Finally, treatment of venom-mice with anti-IL-5- and anti-IL17A-neutralizing mAbs abolished the synthesis of specific IgE, without modifying the splenic hyperplasia or GC formation. In addition, IL-5 and IL-17A negatively regulated the expansion of B1a in peritoneal cavity and BM, and promoted the differentiation of these cells in spleen. And more, IL-5 and IL-17A are sufficient for the generation of ASC B220(neg) in the peritoneal cavity and negatively regulate the number of ASC B220(pos), confirming that the hierarchical process of ASC differentiation triggered by venom needs the signal derived from IL-5 and IL-17A.
Collapse
|
10
|
Ippolito GC, Hoi KH, Reddy ST, Carroll SM, Ge X, Rogosch T, Zemlin M, Shultz LD, Ellington AD, VanDenBerg CL, Georgiou G. Antibody repertoires in humanized NOD-scid-IL2Rγ(null) mice and human B cells reveals human-like diversification and tolerance checkpoints in the mouse. PLoS One 2012; 7:e35497. [PMID: 22558161 PMCID: PMC3338711 DOI: 10.1371/journal.pone.0035497] [Citation(s) in RCA: 57] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2012] [Accepted: 03/19/2012] [Indexed: 11/25/2022] Open
Abstract
Immunodeficient mice reconstituted with human hematopoietic stem cells enable the in vivo study of human hematopoiesis. In particular, NOD-scid-IL2Rγnull engrafted mice have been shown to have reasonable levels of T and B cell repopulation and can mount T-cell dependent responses; however, antigen-specific B-cell responses in this model are generally poor. We explored whether developmental defects in the immunoglobulin gene repertoire might be partly responsible for the low level of antibody responses in this model. Roche 454 sequencing was used to obtain over 685,000 reads from cDNA encoding immunoglobulin heavy (IGH) and light (IGK and IGL) genes isolated from immature, naïve, or total splenic B cells in engrafted NOD-scid-IL2Rγnull mice, and compared with over 940,000 reads from peripheral B cells of two healthy volunteers. We find that while naïve B-cell repertoires in humanized mice are chiefly indistinguishable from those in human blood B cells, and display highly correlated patterns of immunoglobulin gene segment use, the complementarity-determining region H3 (CDR-H3) repertoires are nevertheless extremely diverse and are specific for each individual. Despite this diversity, preferential DH-JH pairings repeatedly occur within the CDR-H3 interval that are strikingly similar across all repertoires examined, implying a genetic constraint imposed on repertoire generation. Moreover, CDR-H3 length, charged amino-acid content, and hydropathy are indistinguishable between humans and humanized mice, with no evidence of global autoimmune signatures. Importantly, however, a statistically greater usage of the inherently autoreactive IGHV4-34 and IGKV4-1 genes was observed in the newly formed immature B cells relative to naïve B or total splenic B cells in the humanized mice, a finding consistent with the deletion of autoreactive B cells in humans. Overall, our results provide evidence that key features of the primary repertoire are shaped by genetic factors intrinsic to human B cells and are principally unaltered by differences between mouse and human stromal microenvironments.
Collapse
MESH Headings
- Animals
- Antibodies, Monoclonal, Humanized/genetics
- Antibodies, Monoclonal, Humanized/immunology
- B-Lymphocytes/immunology
- Base Sequence
- Computational Biology
- DNA Primers/genetics
- DNA, Complementary/genetics
- Flow Cytometry
- Fluorescent Dyes
- Genetic Variation
- Hematopoiesis/immunology
- Hematopoietic Stem Cell Transplantation
- Humans
- Immunoglobulin Subunits/genetics
- Interleukin Receptor Common gamma Subunit/genetics
- Mice
- Mice, Inbred NOD/genetics
- Mice, Inbred NOD/immunology
- Mice, SCID/genetics
- Mice, SCID/immunology
- Molecular Sequence Data
- Sequence Analysis, DNA
- Statistics, Nonparametric
Collapse
Affiliation(s)
- Gregory C. Ippolito
- Section of Molecular Genetics and Microbiology, University of Texas at Austin, Austin, Texas, United States of America
| | - Kam Hon Hoi
- Department of Biomedical Engineering, University of Texas at Austin, Austin, Texas, United States of America
| | - Sai T. Reddy
- Department of Biosystems Science and Engineering, Eidgenössische Technische Hochschule Zurich, Zurich, Switzerland
| | - Sean M. Carroll
- Department of Chemical Engineering, University of Texas at Austin, Austin, Texas, United States of America
| | - Xin Ge
- Chemical and Environmental Engineering, University of California, Riverside, California, United States of America
| | - Tobias Rogosch
- Department of Pediatrics, Philips-University, Marburg, Germany
| | - Michael Zemlin
- Department of Pediatrics, Philips-University, Marburg, Germany
| | | | - Andrew D. Ellington
- Institute for Cellular and Molecular Biology, University of Texas at Austin, Austin, Texas, United States of America
| | - Carla L. VanDenBerg
- Department of Pharmacology and Toxicology, University of Texas at Austin, Austin, Texas, United States of America
| | - George Georgiou
- Section of Molecular Genetics and Microbiology, University of Texas at Austin, Austin, Texas, United States of America
- Department of Biomedical Engineering, University of Texas at Austin, Austin, Texas, United States of America
- Department of Chemical Engineering, University of Texas at Austin, Austin, Texas, United States of America
- Institute for Cellular and Molecular Biology, University of Texas at Austin, Austin, Texas, United States of America
- * E-mail:
| |
Collapse
|
11
|
Kerzel S, Rogosch T, Struecker B, Maier RF, Zemlin M. IgE transcripts in the circulation of allergic children reflect a classical antigen-driven B cell response and not a superantigen-like activation. THE JOURNAL OF IMMUNOLOGY 2010; 185:2253-60. [PMID: 20660349 DOI: 10.4049/jimmunol.0902942] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Allergic asthma is the most frequent chronic disorder in childhood. Although IgE is a central effector molecule in allergic diseases, the nature of the IgE response is still under debate. The objective of our study was to clarify whether the IgE repertoire in the circulation of allergic children represents a classical Ag-driven and oligoclonal B cell response, a superantigen-like activation of a subset of B cells, or a polyclonal B-1 cell expansion. Using a highly sensitive RT-PCR method, we amplified, cloned, and sequenced IgE H chain transcripts from 13 children with allergic asthma. We gained 1366 functional IgE sequences, which currently represent the most extensive collection of human IgE transcripts. Compared to IgM transcripts from the same children, the somatic mutation rate was significantly enhanced in IgE transcripts (21 per thousand versus 72 per thousand; p < 0.001), which renders a polyclonal B-1 response unlikely. Moreover, IgE sequences displayed significantly enhanced Ag selection and hence were indicative of a classical Ag-driven immune response with affinity maturation (p < 0.001). In contrast to several recent studies, the usage pattern of variable gene segment of the H Ig chain in IgE transcripts followed the germline complexity, arguing against a superantigen-like interaction. We conclude that IgE transcripts in the circulation of children with allergic asthma reflect a classical adaptive B-2 cell response. This study provides reference data for a better characterization of the IgE response under immunomodulating therapies, such as anti-IgE therapy or allergen-specific immunotherapy.
Collapse
Affiliation(s)
- Sebastian Kerzel
- Department of Pediatrics, Philipps-University Marburg, Marburg, Germany.
| | | | | | | | | |
Collapse
|