51
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Xie MM, Chen Q, Liu H, Yang K, Koh B, Wu H, Maleki SJ, Hurlburt BK, Cook-Mills J, Kaplan MH, Dent AL. T follicular regulatory cells and IL-10 promote food antigen-specific IgE. J Clin Invest 2020; 130:3820-3832. [PMID: 32255767 PMCID: PMC7324176 DOI: 10.1172/jci132249] [Citation(s) in RCA: 40] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2019] [Accepted: 03/26/2020] [Indexed: 12/17/2022] Open
Abstract
Food allergies are a major clinical problem and are driven by IgE antibodies (Abs) specific for food antigens (Ags). T follicular regulatory (Tfr) cells are a specialized subset of FOXP3+ T cells that modulate Ab responses. Here, we analyzed the role of Tfr cells in regulating Ag-specific IgE using a peanut-based food allergy model in mice. Peanut-specific IgE titers and anaphylaxis responses were significantly blunted in Tfr cell-deficient Foxp3-Cre Bcl6fl/fl mice. Loss of Tfr cells led to greatly increased nonspecific IgE levels, showing that Tfr cells have both helper and suppressor functions in IgE production in the germinal center (GC) that work together to facilitate the production of Ag-specific IgE. Foxp3-Cre Ptenfl/fl mice with augmented Tfr cell responses had markedly higher levels of peanut-specific IgE, revealing an active helper function by Tfr cells on Ag-specific IgE. The helper function of Tfr cells for IgE production involves IL-10, and the loss of IL-10 signaling by B cells led to a severely curtailed peanut-specific IgE response, decreased GCB cell survival, and loss of GC dark zone B cells after peanut sensitization. We thus reveal that Tfr cells have an unexpected helper role in promoting food allergy and may represent a target for drug development.
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Affiliation(s)
| | - Qiang Chen
- Department of Microbiology and Immunology and
| | - Hong Liu
- Department of Microbiology and Immunology and
| | - Kai Yang
- Department of Pediatrics, Indiana University School of Medicine, Indianapolis, Indiana, USA
| | - Byunghee Koh
- Department of Pediatrics, Indiana University School of Medicine, Indianapolis, Indiana, USA
| | - Hao Wu
- Department of Microbiology and Immunology and
| | - Soheila J. Maleki
- Agricultural Research Service, United States Department of Agriculture, Baton Rouge, Louisiana, USA
| | - Barry K. Hurlburt
- Agricultural Research Service, United States Department of Agriculture, Baton Rouge, Louisiana, USA
| | - Joan Cook-Mills
- Department of Pediatrics, Indiana University School of Medicine, Indianapolis, Indiana, USA
| | - Mark H. Kaplan
- Department of Pediatrics, Indiana University School of Medicine, Indianapolis, Indiana, USA
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52
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Abstract
Mast cells are innate immune cells that intersect with the adaptive immunity and play a crucial role in the initiation of allergic reactions and the host defense against certain parasites and venoms. When activated in an allergen- and immunoglobulin E (IgE)-dependent manner, these cells secrete a large variety of allergenic mediators that are pre-stored in secretory granules or
de novo–synthesized. Traditionally, studies have predominantly focused on understanding this mechanism of mast cell activation and regulation. Along this line of study, recent studies have shed light on what structural features are required for allergens and how IgE, particularly anaphylactic IgE, is produced. However, the last few years have seen a flurry of new studies on IgE-independent mast cell activation, particularly via Mrgprb2 (mouse) and MRGPRX2 (human). These studies have greatly advanced our understanding of how mast cells exert non-histaminergic itch, pain, and drug-induced pseudoallergy by interacting with sensory neurons. Recent studies have also characterized mast cell activation and regulation by interleukin-33 (IL-33) and other cytokines and by non-coding RNAs. These newly identified mechanisms for mast cell activation and regulation will further stimulate the allergy/immunology community to develop novel therapeutic strategies for treatment of allergic and non-allergic diseases.
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Affiliation(s)
- Hwan Soo Kim
- Division of Cell Biology, La Jolla Institute for Immunology, La Jolla, California, 92037, USA.,Department of Pediatrics, College of Medicine, The Catholic University of Korea, Seoul, South Korea
| | - Yu Kawakami
- Division of Cell Biology, La Jolla Institute for Immunology, La Jolla, California, 92037, USA
| | - Kazumi Kasakura
- Division of Cell Biology, La Jolla Institute for Immunology, La Jolla, California, 92037, USA
| | - Toshiaki Kawakami
- Division of Cell Biology, La Jolla Institute for Immunology, La Jolla, California, 92037, USA.,Department of Dermatlogy, University of California San Diego, School of Medicine, La Jolla, CA, 92093, USA
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53
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Gowthaman U, Chen JS, Eisenbarth SC. Regulation of IgE by T follicular helper cells. J Leukoc Biol 2020; 107:409-418. [PMID: 31965637 DOI: 10.1002/jlb.3ri1219-425r] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2019] [Revised: 12/02/2019] [Accepted: 12/09/2019] [Indexed: 12/24/2022] Open
Abstract
Allergies to food and environmental antigens have steeply grown to epidemic proportions. IgE antibodies are key mediators of allergic disease, including life-threatening anaphylaxis. There is now compelling evidence that one of the hallmarks of anaphylaxis-inducing IgE molecules is their high affinity for allergen, and the cellular pathway to high-affinity IgE is typically through sequential switching of IgG B cells. Further, in contrast to the previously held paradigm that a subset of CD4+ T cells called Th2 cells promotes IgE responses, recent studies suggest that T follicular helper cells are crucial for inducing anaphylactic IgE. Here we discuss recent studies that have enabled us to understand the nature, induction, and regulation of this enigmatic antibody isotype in allergic sensitization.
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Affiliation(s)
- Uthaman Gowthaman
- Department of Laboratory Medicine, Yale University School of Medicine, New Haven, Connecticut, USA.,Department of Immunobiology, Yale University School of Medicine, New Haven, Connecticut, USA
| | - Jennifer S Chen
- Department of Laboratory Medicine, Yale University School of Medicine, New Haven, Connecticut, USA.,Department of Immunobiology, Yale University School of Medicine, New Haven, Connecticut, USA
| | - Stephanie C Eisenbarth
- Department of Laboratory Medicine, Yale University School of Medicine, New Haven, Connecticut, USA.,Department of Immunobiology, Yale University School of Medicine, New Haven, Connecticut, USA
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54
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Shlomchik MJ, Luo W, Weisel F. Linking signaling and selection in the germinal center. Immunol Rev 2019; 288:49-63. [PMID: 30874353 DOI: 10.1111/imr.12744] [Citation(s) in RCA: 88] [Impact Index Per Article: 17.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2019] [Accepted: 01/24/2019] [Indexed: 12/24/2022]
Abstract
Germinal centers (GC) are sites of rapid B-cell proliferation in response to certain types of immunization. They arise in about 1 week and can persist for several months. In GCs, B cells differentiate in a unique way and begin to undergo somatic mutation of the Ig V regions at a high rate. GC B cells (GCBC) thus undergo clonal diversification that can affect the affinity of the newly mutant B-cell receptor (BCR) for its driving antigen. Through processes that are still poorly understood, GCBC with higher affinity are selectively expanded while those with mutations that inactivate the BCR are lost. In addition, at various times during the extended GC reaction, some GCBC undergo differentiation into either long-lived memory B cells (MBC) or plasma cells. The cellular and molecular signals that govern these fate decisions are not well-understood, but are an active area of research in multiple laboratories. In this review, we cover both the history of this field and focus on recent work that has helped to elucidate the signals and molecules, such as key transcription factors, that coordinate both positive selection as well as differentiation of GCBC.
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Affiliation(s)
- Mark J Shlomchik
- Department of Immunology, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania
| | - Wei Luo
- Department of Immunology, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania
| | - Florian Weisel
- Department of Immunology, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania
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55
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Allergen-specific IgG + memory B cells are temporally linked to IgE memory responses. J Allergy Clin Immunol 2019; 146:180-191. [PMID: 31883847 DOI: 10.1016/j.jaci.2019.11.046] [Citation(s) in RCA: 41] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2019] [Revised: 10/22/2019] [Accepted: 11/19/2019] [Indexed: 01/02/2023]
Abstract
BACKGROUND IgE is the least abundant immunoglobulin and tightly regulated, and IgE-producing B cells are rare. The cellular origin and evolution of IgE responses are poorly understood. OBJECTIVE The cellular and clonal origin of IgE memory responses following mucosal allergen exposure by sublingual immunotherapy (SLIT) were investigated. METHODS In a randomized double-blind, placebo-controlled, time course SLIT study, PBMCs and nasal biopsy samples were collected from 40 adults with seasonal allergic rhinitis at baseline and at 4, 8, 16, 28, and 52 weeks. RNA was extracted from PBMCs, sorted B cells, and nasal biopsy samples for heavy chain variable gene repertoire sequencing. Moreover, mAbs were derived from single B-cell transcriptomes. RESULTS Combining heavy chain variable gene repertoire sequencing and single-cell transcriptomics yielded direct evidence of a parallel boost of 2 clonally and functionally related B-cell subsets of short-lived IgE+ plasmablasts and IgG+ memory B cells. Mucosal grass pollen allergen exposure by SLIT resulted in highly diverse IgE and IgGE repertoires. These were extensively mutated and appeared relatively stable as per heavy chain isotype, somatic hypermutations, and clonal composition. Single IgGE+ memory B-cell and IgE+ preplasmablast transcriptomes encoded antibodies that were specific for major grass pollen allergens and able to elicit basophil activation at very low allergen concentrations. CONCLUSION For the first time, we have shown that on mucosal allergen exposure, human IgE memory resides in allergen-specific IgG+ memory B cells. These cells rapidly switch isotype, expand into short-lived IgE+ plasmablasts, and serve as a potential target for therapeutic intervention.
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56
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Abstract
IgE are absolutely required for initiation of allergy reactions, which affect over 20% of the world's population. IgE are the least prevalent immunoglobulins in circulation with 12-h and 2-day half-lives in mouse and human serum, respectively, but an extended tissue half-life of 3-weeks bound to the surface of mast cells by the high affinity IgE receptor, FcεRI (Gould and Sutton 2008). Although the importance of glycosylation to IgG biology is well established, less is known regarding the contribution of IgE glycosylation to allergic inflammation. IgE has seven and nine N-linked glycosylation sites distributed across human and murine constant chains, respectively. Here we discuss studies that have analyzed IgE glycosylation and its function, and how IgE glycosylation contributions to health and disease.
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57
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Tracing IgE-Producing Cells in Allergic Patients. Cells 2019; 8:cells8090994. [PMID: 31466324 PMCID: PMC6769703 DOI: 10.3390/cells8090994] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2019] [Revised: 08/13/2019] [Accepted: 08/21/2019] [Indexed: 12/11/2022] Open
Abstract
Immunoglobulin E (IgE) is the key immunoglobulin in the pathogenesis of IgE associated allergic diseases affecting 30% of the world population. Recent data suggest that allergen-specific IgE levels in serum of allergic patients are sustained by two different mechanisms: inducible IgE production through allergen exposure, and continuous IgE production occurring even in the absence of allergen stimulus that maintains IgE levels. This assumption is supported by two observations. First, allergen exposure induces transient increases of systemic IgE production. Second, reduction in IgE levels upon depletion of IgE from the blood of allergic patients using immunoapheresis is only temporary and IgE levels quickly return to pre-treatment levels even in the absence of allergen exposure. Though IgE production has been observed in the peripheral blood and locally in various human tissues (e.g., nose, lung, spleen, bone marrow), the origin and main sites of IgE production in humans remain unknown. Furthermore, IgE-producing cells in humans have yet to be fully characterized. Capturing IgE-producing cells is challenging not only because current staining technologies are inadequate, but also because the cells are rare, they are difficult to discriminate from cells bearing IgE bound to IgE-receptors, and plasma cells express little IgE on their surface. However, due to the central role in mediating both the early and late phases of allergy, free IgE, IgE-bearing effector cells and IgE-producing cells are important therapeutic targets. Here, we discuss current knowledge and unanswered questions regarding IgE production in allergic patients as well as possible therapeutic approaches targeting IgE.
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58
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Gould HJ, Wu YCB. IgE repertoire and immunological memory: compartmental regulation and antibody function. Int Immunol 2019; 30:403-412. [PMID: 30053010 PMCID: PMC6116883 DOI: 10.1093/intimm/dxy048] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2018] [Accepted: 07/19/2018] [Indexed: 01/05/2023] Open
Abstract
It is now generally recognized that bone marrow is the survival niche for antigen-specific plasma cells with long-term immunological memory. These cells release antibodies into the circulation, needed to prime effector cells in the secondary immune response. These antibodies participate in the surveillance for antigen and afford immune defence against pathogens and toxins previously encountered in the primary immune response. IgE antibodies function together with their effector cells, mast cells, to exert 'immediate hypersensitivity' in mucosal tissues at the front line of immune defence. The constant supply of IgE antibodies from bone marrow plasma cells allows the rapid 'recall response' by mast cells upon re-exposure to antigen even after periods of antigen absence. The speed and sensitivity of the IgE recall response and potency of the effector cell functions are advantageous in the early detection and elimination of pathogens and toxins at the sites of attack. Local antigen provocation also stimulates de novo synthesis of IgE or its precursors of other isotypes that undergo IgE switching in the mucosa. This process, however, introduces a delay before mast cells can be sensitized and resume activity; this is terminated shortly after the antigen is eliminated. Recent results from adaptive immune receptor repertoire sequencing of immunoglobulin genes suggest that the mucosal IgE+ plasmablasts, which have undergone affinity maturation in the course of their evolution in vivo, are a source of long-lived IgE+ plasma cells in the bone marrow that are already fully functional.
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Affiliation(s)
- Hannah J Gould
- Randall Centre in Cell and Molecular Biophysics, King's College London, London, UK.,MRC Asthma UK Center in Allergic Mechanisms of Asthma, London, UK
| | - Yu-Chang Bryan Wu
- Randall Centre in Cell and Molecular Biophysics, King's College London, London, UK.,MRC Asthma UK Center in Allergic Mechanisms of Asthma, London, UK
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59
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Gowthaman U, Chen JS, Zhang B, Flynn WF, Lu Y, Song W, Joseph J, Gertie JA, Xu L, Collet MA, Grassmann JDS, Simoneau T, Chiang D, Berin MC, Craft JE, Weinstein JS, Williams A, Eisenbarth SC. Identification of a T follicular helper cell subset that drives anaphylactic IgE. Science 2019; 365:science.aaw6433. [PMID: 31371561 PMCID: PMC6901029 DOI: 10.1126/science.aaw6433] [Citation(s) in RCA: 284] [Impact Index Per Article: 56.8] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2019] [Accepted: 07/18/2019] [Indexed: 12/15/2022]
Abstract
Cross-linking of high-affinity immunoglobulin E (IgE) results in the life-threatening allergic reaction anaphylaxis. Yet the cellular mechanisms that induce B cells to produce IgE in response to allergens remain poorly understood. T follicular helper (TFH) cells direct the affinity and isotype of antibodies produced by B cells. Although TFH cell-derived interleukin-4 (IL-4) is necessary for IgE production, it is not sufficient. We report a rare population of IL-13-producing TFH cells present in mice and humans with IgE to allergens, but not when allergen-specific IgE was absent or only low-affinity. These "TFH13" cells have an unusual cytokine profile (IL-13hiIL-4hiIL-5hiIL-21lo) and coexpress the transcription factors BCL6 and GATA3. TFH13 cells are required for production of high- but not low-affinity IgE and subsequent allergen-induced anaphylaxis. Blocking TFH13 cells may represent an alternative therapeutic target to ameliorate anaphylaxis.
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Affiliation(s)
- Uthaman Gowthaman
- Department of Laboratory Medicine, Yale University School of Medicine, New Haven, CT 06520, USA.,Department of Immunobiology, Yale University School of Medicine, New Haven, CT 06520, USA
| | - Jennifer S Chen
- Department of Laboratory Medicine, Yale University School of Medicine, New Haven, CT 06520, USA.,Department of Immunobiology, Yale University School of Medicine, New Haven, CT 06520, USA
| | - Biyan Zhang
- Department of Laboratory Medicine, Yale University School of Medicine, New Haven, CT 06520, USA.,Department of Immunobiology, Yale University School of Medicine, New Haven, CT 06520, USA
| | - William F Flynn
- The Jackson Laboratory for Genomic Medicine, Farmington, CT 06030, USA
| | - Yisi Lu
- Department of Immunobiology, Yale University School of Medicine, New Haven, CT 06520, USA
| | - Wenzhi Song
- Department of Immunobiology, Yale University School of Medicine, New Haven, CT 06520, USA
| | - Julie Joseph
- Department of Laboratory Medicine, Yale University School of Medicine, New Haven, CT 06520, USA
| | - Jake A Gertie
- Department of Laboratory Medicine, Yale University School of Medicine, New Haven, CT 06520, USA.,Department of Immunobiology, Yale University School of Medicine, New Haven, CT 06520, USA
| | - Lan Xu
- Department of Laboratory Medicine, Yale University School of Medicine, New Haven, CT 06520, USA.,Department of Immunobiology, Yale University School of Medicine, New Haven, CT 06520, USA
| | - Magalie A Collet
- The Jackson Laboratory for Genomic Medicine, Farmington, CT 06030, USA
| | | | - Tregony Simoneau
- The Asthma Center, CT Children's Medical Center, Hartford, CT 06106, USA
| | - David Chiang
- Jaffe Food Allergy Institute and Precision Immunology Institute, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA
| | - M Cecilia Berin
- Jaffe Food Allergy Institute and Precision Immunology Institute, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA
| | - Joseph E Craft
- Department of Immunobiology, Yale University School of Medicine, New Haven, CT 06520, USA
| | - Jason S Weinstein
- Center for Immunity and Inflammation, Rutgers New Jersey Medical School, Newark, NJ 07101, USA
| | - Adam Williams
- The Jackson Laboratory for Genomic Medicine, Farmington, CT 06030, USA. .,The Department of Genetics and Genome Sciences, University of Connecticut Health Center, Farmington, CT 06032, USA
| | - Stephanie C Eisenbarth
- Department of Laboratory Medicine, Yale University School of Medicine, New Haven, CT 06520, USA. .,Department of Immunobiology, Yale University School of Medicine, New Haven, CT 06520, USA
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60
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Koning MT, Trollmann IJM, van Bergen CAM, Alvarez Saravia D, Navarrete MA, Kiełbasa SM, Veelken H. Peripheral IgE Repertoires of Healthy Donors Carry Moderate Mutation Loads and Do Not Overlap With Other Isotypes. Front Immunol 2019; 10:1543. [PMID: 31333671 PMCID: PMC6617986 DOI: 10.3389/fimmu.2019.01543] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2019] [Accepted: 06/20/2019] [Indexed: 01/04/2023] Open
Abstract
IgE-mediated allergic disease represents an increasing health problem. Although numerous studies have investigated IgE sequences in allergic patients, little information is available on the healthy IgE repertoire. IgM, IgG, IgA, and IgE transcripts from peripheral blood B cells of five healthy, non-atopic individuals were amplified by unbiased, template-switching, isotype-specific PCR. Complete VDJ regions were sequenced to near-exhaustion on the PacBio platform. Sequences were analyzed for clonal relationships, degree of somatic hypermutation, IGHV gene usage, evidence of antigenic selection, and N-linked glycosylation motifs. IgE repertoires appeared to be highly oligoclonal with preferential usage of certain IGHV genes compared to the other isotypes. IgE sequences carried more somatic mutations than IgM, yet fewer than IgG and IgA. Many IgE sequences contained N-linked glycosylation motifs. IgE sequences had no clonal relationship with the other isotypes. The IgE repertoire in healthy individuals is derived from relatively few clonal expansions without apparent relations to immune reactions that give rise to IgG or IgA. The mutational burden of normal IgE suggests an origin through direct class-switching from the IgM repertoire with little evidence of antigenic drive, and hence presumably low affinity for specific antigens. These findings are compatible with a primary function of the healthy IgE repertoire to occupy Fcε receptors for competitive protection against mast cell degranulation induced by allergen-specific, high-affinity IgE. This background knowledge may help to elucidate pathogenic mechanisms in allergic disease and to design improved desensitization strategies.
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Affiliation(s)
- Marvyn T Koning
- Department of Hematology, Leiden University Medical Center, Leiden, Netherlands
| | - Ignis J M Trollmann
- Department of Hematology, Leiden University Medical Center, Leiden, Netherlands
| | | | | | | | - Szymon M Kiełbasa
- Department of Biomedical Data Sciences, Leiden University Medical Center, Leiden, Netherlands
| | - Hendrik Veelken
- Department of Hematology, Leiden University Medical Center, Leiden, Netherlands
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61
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Mucosal IgE immune responses in respiratory diseases. Curr Opin Pharmacol 2019; 46:100-107. [PMID: 31220711 DOI: 10.1016/j.coph.2019.05.009] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2019] [Accepted: 05/17/2019] [Indexed: 01/19/2023]
Abstract
IgE is the less abundant immunoglobulin isotype in serum and displays higher affinity for its cognate Fc receptor (FcεRI) than the rest of antibody isotypes. Moreover, the class switch recombination and the generation of memory responses remarkably differ between IgE and other isotypes. Importantly, class switch recombination to IgE can occur in the mucosae, preferentially through the sequential switching from IgG. Therefore, resident effector cells get rapidly sensitized, and free IgE can be found in mucosal secretions. All these aspects explain the involvement of IgE in respiratory diseases. In allergic rhinitis and allergic asthma, the IgE-sensitization to environmental allergens triggers an eosinophilic inflammation of the airway mucosa of atopic patients. In recent years, growing evidence indicates that some non-atopic patients with nasal reactivity to allergens display nasal eosinophilic inflammation, which could be triggered by the local production of allergen-specific IgE. This phenotype has been termed local allergic rhinitis. Mucosal IgE is also implicated in the pathophysiology of chronic rhinosinusitis with nasal polyps, even though the mechanisms for IgE synthesis might differ in this case. The role of IgE as mediator of airway diseases identify this marker as a therapeutic target. Some biologicals antagonize IgE-mediated inflammation of the airway mucosa, but they have not shown a beneficial long-term effect after discontinuation. In contrast, allergen immunotherapy does not only control the symptoms of airway allergy, but it also induces a long-lasting effect after discontinuation, thus modifying the natural course of the disease.
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62
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Cañete PF, Sweet RA, Gonzalez-Figueroa P, Papa I, Ohkura N, Bolton H, Roco JA, Cuenca M, Bassett KJ, Sayin I, Barry E, Lopez A, Canaday DH, Meyer-Hermann M, Doglioni C, Fazekas de St Groth B, Sakaguchi S, Cook MC, Vinuesa CG. Regulatory roles of IL-10-producing human follicular T cells. J Exp Med 2019; 216:1843-1856. [PMID: 31209070 PMCID: PMC6683995 DOI: 10.1084/jem.20190493] [Citation(s) in RCA: 54] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2019] [Revised: 05/02/2019] [Accepted: 05/20/2019] [Indexed: 12/14/2022] Open
Abstract
Uncontrolled IgE responses drive allergies and anaphylaxis. Here, Cañete et al. describe a human follicular regulatory T cell population that does not express FOXP3 and produces abundant IL-10, which limits IgE switching. These cells appear to be key regulators of atopy. Mucosal lymphoid tissues such as human tonsil are colonized by bacteria and exposed to ingested and inhaled antigens, requiring tight regulation of immune responses. Antibody responses are regulated by follicular helper T (TFH) cells and FOXP3+ follicular regulatory T (TFR) cells. Here we describe a subset of human tonsillar follicular T cells identified by expression of TFH markers and CD25 that are the main source of follicular T (TF) cell–derived IL-10. Despite lack of FOXP3 expression, CD25+ TF cells resemble T reg cells in high CTLA4 expression, low IL-2 production, and their ability to repress T cell proliferation. CD25+ TF cell–derived IL-10 dampens induction of B cell class-switching to IgE. In children, circulating total IgE titers were inversely correlated with the frequencies of tonsil CD25+ TF cells and IL-10–producing TF cells but not with total T reg cells, TFR, or IL-10–producing T cells. Thus, CD25+ TF cells emerge as a subset with unique T and B cell regulatory activities that may help prevent atopy.
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Affiliation(s)
- Pablo F Cañete
- Department of Immunology and Infectious Disease and Centre for Personalised Immunology, The John Curtin School of Medical Research, The Australian National University, Canberra, Australia
| | - Rebecca A Sweet
- Department of Immunology and Infectious Disease and Centre for Personalised Immunology, The John Curtin School of Medical Research, The Australian National University, Canberra, Australia
| | - Paula Gonzalez-Figueroa
- Department of Immunology and Infectious Disease and Centre for Personalised Immunology, The John Curtin School of Medical Research, The Australian National University, Canberra, Australia
| | - Ilenia Papa
- Department of Immunology and Infectious Disease and Centre for Personalised Immunology, The John Curtin School of Medical Research, The Australian National University, Canberra, Australia
| | - Naganari Ohkura
- Laboratory of Experimental Immunology, World Premier International Research Center Immunology Frontier Research Center, Osaka University, Osaka, Japan
| | - Holly Bolton
- Discipline of Pathology, School of Medical Sciences, Charles Perkins Centre, University of Sydney, New South Wales, Australia
| | - Jonathan A Roco
- Department of Immunology and Infectious Disease and Centre for Personalised Immunology, The John Curtin School of Medical Research, The Australian National University, Canberra, Australia
| | - Marta Cuenca
- Department of Immunology and Infectious Disease and Centre for Personalised Immunology, The John Curtin School of Medical Research, The Australian National University, Canberra, Australia
| | - Katharine J Bassett
- Department of Immunology and Infectious Disease and Centre for Personalised Immunology, The John Curtin School of Medical Research, The Australian National University, Canberra, Australia
| | - Ismail Sayin
- Division of Infectious Diseases and HIV Medicine, Case Western Reserve University, Cleveland, OH
| | - Emma Barry
- Cytokine Receptor Laboratory, Centre for Cancer Biology, Adelaide, Australia
| | - Angel Lopez
- Cytokine Receptor Laboratory, Centre for Cancer Biology, Adelaide, Australia
| | - David H Canaday
- Division of Infectious Diseases and HIV Medicine, Case Western Reserve University, Cleveland, OH
| | - Michael Meyer-Hermann
- Department of Systems Immunology and Braunschweig Integrated Centre of Systems Biology, Helmholtz Centre for Infection Research, Braunschweig, Germany
| | - Claudio Doglioni
- Department Pathology, San Raffaele Scientific Institute, Università Vita-Salute, Milan, Italy
| | - Barbara Fazekas de St Groth
- Discipline of Pathology, School of Medical Sciences, Charles Perkins Centre, University of Sydney, New South Wales, Australia
| | - Shimon Sakaguchi
- Laboratory of Experimental Immunology, World Premier International Research Center Immunology Frontier Research Center, Osaka University, Osaka, Japan
| | - Matthew C Cook
- Department of Immunology and Infectious Disease and Centre for Personalised Immunology, The John Curtin School of Medical Research, The Australian National University, Canberra, Australia.,Department of Immunology, Canberra Hospital, Canberra, Australia
| | - Carola G Vinuesa
- Department of Immunology and Infectious Disease and Centre for Personalised Immunology, The John Curtin School of Medical Research, The Australian National University, Canberra, Australia
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63
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Saunders SP, Ma EGM, Aranda CJ, Curotto de Lafaille MA. Non-classical B Cell Memory of Allergic IgE Responses. Front Immunol 2019; 10:715. [PMID: 31105687 PMCID: PMC6498404 DOI: 10.3389/fimmu.2019.00715] [Citation(s) in RCA: 50] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2018] [Accepted: 03/18/2019] [Indexed: 02/03/2023] Open
Abstract
The long-term effectiveness of antibody responses relies on the development of humoral immune memory. Humoral immunity is maintained by long-lived plasma cells that secrete antigen-specific antibodies, and memory B cells that rapidly respond to antigen re-exposure by generating new plasma cells and memory B cells. Developing effective immunological memory is essential for protection against pathogens, and is the basis of successful vaccinations. IgE responses have evolved for protection against helminth parasites infections and against toxins, but IgE is also a potent mediator of allergic diseases. There has been a dramatic increase in the incidence of allergic diseases in recent decades and this has provided the impetus to study the nature of IgE antibody responses. As will be discussed in depth in this review, the IgE memory response has unique features that distinguish it from classical B cell memory.
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Affiliation(s)
- Sean P Saunders
- Division of Pulmonary, Critical Care and Sleep Medicine, Laboratory of Allergy and Inflammation, Department of Medicine, New York University, New York, NY, United States
| | - Erica G M Ma
- Division of Pulmonary, Critical Care and Sleep Medicine, Laboratory of Allergy and Inflammation, Department of Medicine, New York University, New York, NY, United States.,Sackler Institute of Graduate Biomedical Sciences, New York University, New York, NY, United States
| | - Carlos J Aranda
- Division of Pulmonary, Critical Care and Sleep Medicine, Laboratory of Allergy and Inflammation, Department of Medicine, New York University, New York, NY, United States
| | - Maria A Curotto de Lafaille
- Division of Pulmonary, Critical Care and Sleep Medicine, Laboratory of Allergy and Inflammation, Department of Medicine, New York University, New York, NY, United States.,Department of Cell Biology, New York University School of Medicine, New York, NY, United States
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64
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The AKT kinase signaling network is rewired by PTEN to control proximal BCR signaling in germinal center B cells. Nat Immunol 2019; 20:736-746. [PMID: 31011187 PMCID: PMC6724213 DOI: 10.1038/s41590-019-0376-3] [Citation(s) in RCA: 41] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2018] [Accepted: 03/12/2019] [Indexed: 01/04/2023]
Abstract
Compared to naïve B cells (NBCs), both B cell antigen receptor (BCR) and CD40 signaling are rewired in germinal center (GC) B cells (GCBCs) to optimize selection for high-affinity B cells. The mechanism for BCR reprogramming in GCBCs remains unknown. We describe a GC-specific, AKT kinase-driven negative feedback loop that attenuates BCR signaling. A mass spectrometry proteomic approach revealed that AKT activity was retargeted in GCBCs compared to NBCs. Retargeting was linked to differential AKT T308 and S473 phosphorylation, in turn due to GC-specific upregulation of phosphoinositide-dependent protein kinase PDK1 and the phosphatase PTEN, which retuned phosphatidylinositol-3-OH kinase (PI3K) signals. In GCBCs, AKT preferentially targeted CSK, SHP-1 and HPK1, which are negative regulators of BCR signaling. Phosphorylation results in markedly increased enzymatic activity of these proteins, creating a negative-feedback loop that dampens upstream BCR signaling. Inhibiting AKT substantially enhanced activation of BCR proximal kinase LYN as well as downstream BCR signaling molecules in GCBCs, establishing the relevance of this pathway.
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65
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Chaoul N, Albanesi M, Giliberti L, Rossi MP, Nettis E, Di Bona D, Caiaffa MF, Macchia L. Maintenance-Phase Subcutaneous Immunotherapy with House Dust Mites Induces Cyclic Immunologic Effects. Int Arch Allergy Immunol 2019; 179:37-42. [PMID: 30921804 DOI: 10.1159/000496436] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2018] [Accepted: 12/20/2018] [Indexed: 11/19/2022] Open
Abstract
BACKGROUND Subcutaneous immunotherapy (SCIT) is an effective treatment of respiratory allergies including house dust mite (HDM) and Hymenoptera venom allergy. During the build-up phase, the allergen is administered weekly at increasing doses, while during the maintenance phase, it is administered at a fixed high dose every 4 weeks. Upon SCIT injection, the allergen is driven to the draining lymph nodes where it most likely induces an immune response. Immunologic changes are thus supposedly induced at each injection. OBJECTIVES It is now established that SCIT induces tolerance in the long term, but the precise underlying immunologic mechanisms remain unclear. Therefore, we wanted to analyze the immunologic changes induced in both innate and adaptive immune cells at each individual SCIT administration during the maintenance phase in HDM-allergic patients. More specifically, we wondered whether the changes in regulatory T cell (Treg) and IgE+ B cell percentages, which are observed at the end of a 3-year course of SCIT, already occurred during the maintenance phase and whether these possible changes were sustained. METHODS We enrolled 6 patients suffering from HDM allergic rhinitis and undergoing maintenance HDM SCIT for 18-24 months. The same SCIT extract was used for all patients. We collected blood samples at 5 time points: T1 (immediately before a given SCIT injection), T2 (9 days after T1), T3 (29 days after T1 and right before the successive administration), T4 (39 days after T1), and T5 (61 days after T1 and just before the next injection). Six non-allergic age-matched healthy individuals were used as controls. Using flow cytometry, we assessed the following cell subsets in peripheral blood mononuclear cells: CD4 and CD8 T cells, Tregs, B cells, IgE+ B cells, NK and NKT cells, and total and activated basophils. RESULTS HDM-allergic patients displayed increased percentages of CD4 and CD8 T cells and NK cells compared to healthy controls. In contrast, NKT cells, total B cells, and basophils were diminished. These differences were maintained throughout the time course and seemed to be independent of the periodical SCIT injections. On the contrary, Treg percentages were significantly reduced in all HDM-allergic patients at T1. However, they increased at T2 and T4 (9 days after each SCIT injection) but decreased again at T3 and T5, just before the next one, resulting in cyclic changes. IgE+ B cells were significantly increased at T1, even more increased after each administration (T2, T4), and went back to their initial levels at T3 and T5, also resulting in a cyclic pattern. CONCLUSIONS Our data suggest that during the SCIT maintenance phase, cycles of expansion/contraction of Tregs and IgE+ B cells occur at each SCIT injection. Therefore, the sustained induction of immune tolerance by SCIT, through the increase of Tregs, seems to depend on the periodical exposure to the allergen, at least during the early steady state.
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Affiliation(s)
- Nada Chaoul
- Department of Emergency and Organ Transplantation, School of Allergology and Clinical Immunology, University of Bari Aldo Moro, Policlinico di Bari, Bari, Italy
| | - Marcello Albanesi
- Department of Emergency and Organ Transplantation, School of Allergology and Clinical Immunology, University of Bari Aldo Moro, Policlinico di Bari, Bari, Italy,
| | - Lucia Giliberti
- Department of Emergency and Organ Transplantation, School of Allergology and Clinical Immunology, University of Bari Aldo Moro, Policlinico di Bari, Bari, Italy
| | - Maria Pia Rossi
- Department of Emergency and Organ Transplantation, School of Allergology and Clinical Immunology, University of Bari Aldo Moro, Policlinico di Bari, Bari, Italy
| | - Eustachio Nettis
- Department of Emergency and Organ Transplantation, School of Allergology and Clinical Immunology, University of Bari Aldo Moro, Policlinico di Bari, Bari, Italy
| | - Danilo Di Bona
- Department of Emergency and Organ Transplantation, School of Allergology and Clinical Immunology, University of Bari Aldo Moro, Policlinico di Bari, Bari, Italy
| | - Maria Filomena Caiaffa
- Department of Medical and Surgical Sciences, School of Allergology and Clinical Immunology, University of Foggia, Foggia, Italy
| | - Luigi Macchia
- Department of Emergency and Organ Transplantation, School of Allergology and Clinical Immunology, University of Bari Aldo Moro, Policlinico di Bari, Bari, Italy
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66
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Ramadani F, Bowen H, Gould HJ, Fear DJ. Transcriptional Analysis of the Human IgE-Expressing Plasma Cell Differentiation Pathway. Front Immunol 2019; 10:402. [PMID: 30915071 PMCID: PMC6421273 DOI: 10.3389/fimmu.2019.00402] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2018] [Accepted: 02/15/2019] [Indexed: 11/13/2022] Open
Abstract
IgE is secreted by plasma cells (PCs) and is central to allergic disease. Using an ex vivo tonsil B cell culture system, which mimics the Th2 responses in vivo, we have recently characterized the development pathway of human IgE-expressing PCs. In this system, as in mice, we reported the predisposition of IgE-expressing B cells to differentiate into PCs. To gain a comprehensive understanding of the molecular events involved in the differentiation of human IgE+ B cells into PCs we have used the Illumina HumanHT-12 v4 Expression BeadChip array to analyse the gene expression profile of ex vivo generated human IgE+ B cells at various stages of their differentiation into PCs. We also compared the transcription profiles of IgE+ and IgG1+ cells to discover isotype-specific patterns. Comparisons of IgE+ and IgG1+ cell transcriptional profiles revealed molecular signatures specific for IgE+ cells, which diverge from their IgG1+ cell counterparts upon differentiation into PCs. At the germinal center (GC) stage of development, unlike in some mouse studies of IgE biology, we observed similar rates of apoptosis and no significant differences in the expression of apoptosis-associated genes between the IgE+ and IgG1+ B cells. We identified a gene interaction network associated with early growth response 1 (EGR1) that, together with the up-regulated IRF4, may account for the predisposition of IgE+ B cells to differentiate into PCs. However, despite their swifter rates of PC differentiation, the transcription profile of IgE+ PCs is more closely related to IgE+ and IgG1+ plasmablasts (PBs) than to IgG1+ PCs, suggesting that the terminal differentiation of IgE+ cells is impeded. We also show that IgE+ PCs have increased levels of apoptosis suggesting that the IgE+ PCs generated in our in vitro tonsil B cell cultures, as in mice, are short-lived. We identified gene regulatory networks as well as cell cycle and apoptosis signatures that may explain the diverging PC differentiation programme of these cells. Overall, our study provides a detailed analysis of the transcriptional pathways underlying the differentiation of human IgE-expressing B cells and points to molecular signatures that regulate IgE+ PC differentiation and function.
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Affiliation(s)
- Faruk Ramadani
- Randall Centre for Cell and Molecular Biophysics, School of Basic and Medical Biosciences, King's College London, London, United Kingdom.,Asthma UK Centre, Allergic Mechanisms in Asthma, King's College London, London, United Kingdom
| | - Holly Bowen
- Randall Centre for Cell and Molecular Biophysics, School of Basic and Medical Biosciences, King's College London, London, United Kingdom.,Asthma UK Centre, Allergic Mechanisms in Asthma, King's College London, London, United Kingdom
| | - Hannah J Gould
- Randall Centre for Cell and Molecular Biophysics, School of Basic and Medical Biosciences, King's College London, London, United Kingdom.,Asthma UK Centre, Allergic Mechanisms in Asthma, King's College London, London, United Kingdom
| | - David J Fear
- Asthma UK Centre, Allergic Mechanisms in Asthma, King's College London, London, United Kingdom.,Peter Gorer Department of Immunobiology, School of Immunology & Microbial Sciences, King's College London, London, United Kingdom
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67
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Higgins BW, McHeyzer-Williams LJ, McHeyzer-Williams MG. Programming Isotype-Specific Plasma Cell Function. Trends Immunol 2019; 40:345-357. [PMID: 30846256 DOI: 10.1016/j.it.2019.01.012] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2018] [Revised: 01/28/2019] [Accepted: 01/29/2019] [Indexed: 01/06/2023]
Abstract
Helper T cell induced plasma cells (PCs) that secrete class-switched neutralizing antibody are paramount to effective immunity. Following class-switch recombination (CSR), antigen-activated B cells differentiate into extrafollicular PCs or mature in germinal centers (GCs) to produce high-affinity memory B cells and follicular PCs. Many studies focus on the core transcriptional programs that drive central PC functions of longevity and antibody secretion. However, it is becoming clear that these central programs are further subdivided across antibody isotype with separable transcriptional trajectories. Divergent functions emerge at CSR, persist through PC terminal differentiation and further assort memory PC function following antigen recall. Here, we emphasize recent work that assorts divergent isotype-specific PC function across four major modules of immune protection.
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Affiliation(s)
- Brett W Higgins
- The Scripps Research Institute, Department of Immunology and Microbiology, La Jolla, CA 92037, USA
| | - Louise J McHeyzer-Williams
- The Scripps Research Institute, Department of Immunology and Microbiology, La Jolla, CA 92037, USA. https://twitter.com/mmw_lmw
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68
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Yang Z, Jung JB, Allen CDC. Study of IgE-Producing B Cells Using the Verigem Fluorescent Reporter Mouse. Methods Mol Biol 2019; 1799:247-264. [PMID: 29956157 DOI: 10.1007/978-1-4939-7896-0_19] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Immunoglobulin E (IgE) is the least abundant antibody isotype in mammalians, yet it plays a critical role in allergy and asthma. IgE-producing (IgE+) B cells are rare and difficult to detect, which have hindered progress to understand their generation and differentiation. Recently developed new fluorescent IgE reporter mice have enabled better understanding of the biology of IgE+ B cells. We here describe the usage of the Verigem IgE reporter mouse to study IgE+ B cells and plasma cells by flow cytometry and microscopy.
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Affiliation(s)
- Zhiyong Yang
- Cardiovascular Research Institute, University of California, San Francisco, CA, USA.,Sandler Asthma Basic Research Center, University of California, San Francisco, CA, USA
| | - James B Jung
- Cardiovascular Research Institute, University of California, San Francisco, CA, USA.,Sandler Asthma Basic Research Center, University of California, San Francisco, CA, USA
| | - Christopher D C Allen
- Cardiovascular Research Institute, University of California, San Francisco, CA, USA. .,Sandler Asthma Basic Research Center, University of California, San Francisco, CA, USA. .,Department of Anatomy, University of California, San Francisco, CA, USA.
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69
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Abstract
In this review, Boothby et al. summarize some salient advances toward elucidation of the molecular programming of the fate choices and function of B cells in the periphery. They also note unanswered questions that pertain to differences among subsets of B lymphocytes and plasma cells. Mature B lymphocytes are crucial components of adaptive immunity, a system essential for the evolutionary fitness of mammals. Adaptive lymphocyte function requires an initially naïve cell to proliferate extensively and its progeny to have the capacity to assume a variety of fates. These include either terminal differentiation (the long-lived plasma cell) or metastable transcriptional reprogramming (germinal center and memory B cells). In this review, we focus principally on the regulation of differentiation and functional diversification of the “B2” subset. An overview is combined with an account of more recent advances, including initial work on mechanisms that eliminate DNA methylation and potential links between intracellular metabolites and chromatin editing.
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70
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Rondón C, Eguíluz-Gracia I, Shamji MH, Layhadi JA, Salas M, Torres MJ, Campo P. IgE Test in Secretions of Patients with Respiratory Allergy. Curr Allergy Asthma Rep 2018; 18:67. [PMID: 30317418 DOI: 10.1007/s11882-018-0821-7] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
PURPOSE OF REVIEW IgE is a key player in multiple inflammatory airway diseases. Ample literature demonstrates its presence in mucosa of patients with allergic rhinitis (AR), local allergic rhinitis (LAR), asthma, or chronic rhinosinusitis with nasal polyposis (CRSwNP). RECENT FINDINGS Current evidence shows that high-affinity IgE in blood stream of allergic individuals derives mainly from the mucosae. Also, mucosal synthesis of IgE can occur in the absence of systemic atopy, and may be relevant in atopic and non-atopic phenotypes of rhinitis as demonstrated in LAR. Specific IgE (sIgE) detection varies depending on technique used for sample collection and its measurement. sIgE detection is highly specific for diagnosis of LAR. Moreover, measurement of sIgE in secretions could be useful in monitoring response to allergen-specific immunotherapy in both AR and LAR phenotypes. This review will focus on recent developments in the role of IgE in respiratory diseases, and the clinical implications of its measurement in secretions.
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Affiliation(s)
- Carmen Rondón
- Allergy Unit, IBIMA-Regional University Hospital of Málaga, Málaga, Spain
| | | | - Mohamed H Shamji
- Immunomodulation and Tolerance Group, Allergy and Clinical Immunology, Inflammation, Repair and Development, MRC Asthma UK Centre Imperial College London, London, UK
| | - Janice A Layhadi
- Immunomodulation and Tolerance Group, Allergy and Clinical Immunology, Inflammation, Repair and Development, MRC Asthma UK Centre Imperial College London, London, UK
| | - María Salas
- Allergy Unit, IBIMA-Regional University Hospital of Málaga, Málaga, Spain
| | - María José Torres
- Allergy Unit, IBIMA-Regional University Hospital of Málaga, Málaga, Spain
| | - Paloma Campo
- Allergy Unit, IBIMA-Regional University Hospital of Málaga, Málaga, Spain.
- Plaza Hospital Civil, 29009, Málaga, Spain.
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71
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Ward DE, Fay BL, Adejuwon A, Han H, Ma Z. Chimeric Antigen Receptors Based on Low Affinity Mutants of FcεRI Re-direct T Cell Specificity to Cells Expressing Membrane IgE. Front Immunol 2018; 9:2231. [PMID: 30364107 PMCID: PMC6191488 DOI: 10.3389/fimmu.2018.02231] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2018] [Accepted: 09/07/2018] [Indexed: 12/31/2022] Open
Abstract
IgE is the key mediator of allergic responses. Omalizumab, an IgE-specific monoclonal antibody that depletes IgE, is effective for treating severe allergic asthma. The need for frequent administration of the expensive drug, however, limits its applications. Taking advantage of T cell memory, adoptive T cell therapy (ACT) targeting IgE-producing cells has the potential to achieve long-term suppression of IgE and relief of symptoms for severe allergic diseases. The transmembrane form of IgE (mIgE), which is present on all IgE-producing cells, serves as an excellent molecular target for ACT that employs chimeric antigen receptors (CARs). Here, we designed and tested CARs that use the extracellular domain of high affinity IgE receptor, FcεRIα, for mIgE recognition. When expressed on Jurkat T cells, FcεRIα-based CARs mediated robust responses in terms of CD69 upregulation to U266 myeloma cells expressing low levels of mIgE. FcεRIα-based CARs specifically recognized cells expressing mIgE, but not cells with secreted IgE captured through Fcε receptors. CAR+ Jurkat cells did not respond to LAD2 mast cells with secreted IgE bound through FcεRI or Ramos cells with secreted IgE bound through FcεRII. Co-culture of CAR+ Jurkat cells and LAD2 mast cells with IgE bound did not trigger LAD2 cell degranulation. The activity of CAR using wild type FcεRIα for mIgE binding was inhibited by the presence secreted IgE, which likely blocked CAR-mIgE interaction. The activities of CARs using low affinity mutants of FcεRIα, however, tolerated secreted IgE at relatively high concentrations. Moreover, primary human CD8+ T cells expressing a low affinity mutant CAR responded to U266 cells with INFγ production and cytotoxicity despite the presence of secreted IgE. The potency, specificity, and robustness of our CAR design, combined with repaid advances in the safety of ACT, hold promise for novel and highly effective cell-based therapies against severe allergic diseases.
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Affiliation(s)
- Dana E Ward
- Department of Biomedical Research, Nemours/A.I. duPont Hospital for Children, Wilmington, DE, United States
| | - Brittany L Fay
- Department of Biomedical Research, Nemours/A.I. duPont Hospital for Children, Wilmington, DE, United States
| | - Adebomi Adejuwon
- Department of Biological Sciences, University of Delaware, Newark, DE, United States
| | - Huihui Han
- Department of Biomedical Research, Nemours/A.I. duPont Hospital for Children, Wilmington, DE, United States
| | - Zhengyu Ma
- Department of Biomedical Research, Nemours/A.I. duPont Hospital for Children, Wilmington, DE, United States
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72
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Affiliation(s)
- Niklas Engels
- Institute of Cellular & Molecular Immunology; University Medical Center Göttingen; Göttingen Germany
| | - Jürgen Wienands
- Institute of Cellular & Molecular Immunology; University Medical Center Göttingen; Göttingen Germany
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73
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Vanshylla K, Opazo F, Gronke K, Wienands J, Engels N. The extracellular membrane-proximal domain of membrane-bound IgE restricts B cell activation by limiting B cell antigen receptor surface expression. Eur J Immunol 2017; 48:441-453. [PMID: 29150831 DOI: 10.1002/eji.201747196] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2017] [Revised: 10/03/2017] [Accepted: 11/10/2017] [Indexed: 12/17/2022]
Abstract
Immunoglobulin E (IgE) antibodies are key mediators of allergic reactions. Due to their potentially harmful anaphylactic properties, their production is tightly regulated. The membrane-bound isoform of IgE (mIgE), which is an integral component of the B cell antigen receptor, has been shown to be critical for the regulation of IgE responses in mice. In primate species including humans, mIgE can be expressed in two isoforms that are produced by alternative splicing of the primary ε Ig heavy chain transcript, and differ in the absence or presence of an extracellular membrane-proximal domain (EMPD) consisting of 52 amino acids. However, the function of the EMPD remains unclear. Here, we demonstrate that the EMPD restricts surface expression of mIgE-containing BCRs in human and murine B cells. The EMPD does not interfere with BCR assembly but acts as an autonomous endoplasmic reticulum retention domain. Limited surface expression of EMPD-containing mIgE-BCRs caused impaired activation of intracellular signaling cascades and hence represents a regulatory mechanism that may control the production of potentially anaphylactic IgE antibodies in primate species.
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Affiliation(s)
- Kanika Vanshylla
- Institute of Cellular & Molecular Immunology, Unversity Medical Center Göttingen, Göttingen, Germany
| | - Felipe Opazo
- Institute of Neuro- & Sensory Physiology, University Medical Center Göttingen, Göttingen, Germany.,Center for Biostructural Imaging of Neurodegeneration (BIN), University Medical Center Göttingen, Göttingen, Germany
| | - Konrad Gronke
- Institute of Cellular & Molecular Immunology, Unversity Medical Center Göttingen, Göttingen, Germany
| | - Jürgen Wienands
- Institute of Cellular & Molecular Immunology, Unversity Medical Center Göttingen, Göttingen, Germany
| | - Niklas Engels
- Institute of Cellular & Molecular Immunology, Unversity Medical Center Göttingen, Göttingen, Germany
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74
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Laffleur B, Debeaupuis O, Dalloul Z, Cogné M. B Cell Intrinsic Mechanisms Constraining IgE Memory. Front Immunol 2017; 8:1277. [PMID: 29180995 PMCID: PMC5694035 DOI: 10.3389/fimmu.2017.01277] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2017] [Accepted: 09/25/2017] [Indexed: 12/25/2022] Open
Abstract
Memory B cells and long-lived plasma cells are key elements of adaptive humoral immunity. Regardless of the immunoglobulin class produced, these cells can ensure long-lasting protection but also long-lasting immunopathology, thus requiring tight regulation of their generation and survival. Among all antibody classes, this is especially true for IgE, which stands as the most potent, and can trigger dramatic inflammatory reactions even when present in minute amounts. IgE responses and memory crucially protect against parasites and toxic components of venoms, conferring selective advantages and explaining their conservation in all mammalian species despite a parallel broad spectrum of IgE-mediated immunopathology. Long-term memory of sensitization and anaphylactic responses to allergens constitute the dark side of IgE responses, which can trigger multiple acute or chronic pathologic manifestations, some punctuated with life-threatening events. This Janus face of the IgE response and memory, both necessary and potentially dangerous, thus obviously deserves the most elaborated self-control schemes.
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Affiliation(s)
- Brice Laffleur
- Department of Microbiology and Immunology, College of Physicians and Surgeons, Columbia University, New York, NY, United States
| | | | - Zeinab Dalloul
- UMR 7276 Centre National de la Recherche Scientifique: Contrôle de la Réponse Immune B et des Lymphoproliférations, Université de Limoges, Limoges, France
| | - Michel Cogné
- UMR 7276 Centre National de la Recherche Scientifique: Contrôle de la Réponse Immune B et des Lymphoproliférations, Université de Limoges, Limoges, France.,Institut Universitaire de France, Paris, France
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75
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Hikosaka M, Murata A, Yoshino M, Hayashi SI. Correlation between cell aggregation and antibody production in IgE-producing plasma cells. Biochem Biophys Rep 2017; 10:224-231. [PMID: 28955750 PMCID: PMC5614669 DOI: 10.1016/j.bbrep.2017.04.007] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2017] [Revised: 04/01/2017] [Accepted: 04/18/2017] [Indexed: 01/18/2023] Open
Abstract
Allergic conditions result in the increase of immunoglobulin (Ig)E-producing plasma cells (IgE-PCs); however, it is unclear how IgE production is qualitatively controlled. In this study, we found that IgE-PCs in spleen of immunized mice formed homotypic cell aggregates. By employing IgE-producing hybridomas (IgE-hybridomas) as a model of IgE-PCs, we showed that these cells formed aggregates in the presence of specific antigens (Ags). The formation of the Ag-induced cell aggregation involved secreted IgE and Fcγ receptor (FcγR)II/FcγRIII, but not FcεRs. Ag-induced cell aggregation plus lipopolysaccharide signaling resulted in an enhancement of IgE production in aggregated IgE-hybridomas. Furthermore, the administration of anti-FcγRII/FcγRIII antagonistic monoclonal antibody to immunized mice tended to reduce the splenic IgE-PC aggregation as well as the serum IgE levels. Taken together, our results suggested that Ag-IgE complexes induced IgE-PCs aggregation via FcγRII/FcγRIII, leading to the enhancement of IgE production. These findings suggest the presence of a novel mechanism for regulation of IgE production.
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Affiliation(s)
- Mari Hikosaka
- Division of Immunology, Department of Molecular and Cellular Biology, School of Life Science, Faculty of Medicine, Tottori University, 86 Nishi-Cho, Yonago, Tottori 683-8503, Japan
| | - Akihiko Murata
- Division of Immunology, Department of Molecular and Cellular Biology, School of Life Science, Faculty of Medicine, Tottori University, 86 Nishi-Cho, Yonago, Tottori 683-8503, Japan
| | - Miya Yoshino
- Division of Immunology, Department of Molecular and Cellular Biology, School of Life Science, Faculty of Medicine, Tottori University, 86 Nishi-Cho, Yonago, Tottori 683-8503, Japan
| | - Shin-Ichi Hayashi
- Division of Immunology, Department of Molecular and Cellular Biology, School of Life Science, Faculty of Medicine, Tottori University, 86 Nishi-Cho, Yonago, Tottori 683-8503, Japan
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76
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He JS, Subramaniam S, Narang V, Srinivasan K, Saunders SP, Carbajo D, Wen-Shan T, Hidayah Hamadee N, Lum J, Lee A, Chen J, Poidinger M, Zolezzi F, Lafaille JJ, Curotto de Lafaille MA. IgG1 memory B cells keep the memory of IgE responses. Nat Commun 2017; 8:641. [PMID: 28935935 PMCID: PMC5608722 DOI: 10.1038/s41467-017-00723-0] [Citation(s) in RCA: 115] [Impact Index Per Article: 16.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2016] [Accepted: 07/23/2017] [Indexed: 02/03/2023] Open
Abstract
The unique differentiation of IgE cells suggests unconventional mechanisms of IgE memory. IgE germinal centre cells are transient, most IgE cells are plasma cells, and high affinity IgE is produced by the switching of IgG1 cells to IgE. Here we investigate the function of subsets of IgG1 memory B cells in IgE production and find that two subsets of IgG1 memory B cells, CD80+CD73+ and CD80-CD73-, contribute distinctively to the repertoires of high affinity pathogenic IgE and low affinity non-pathogenic IgE. Furthermore, repertoire analysis indicates that high affinity IgE and IgG1 plasma cells differentiate from rare CD80+CD73+ high affinity memory clones without undergoing further mutagenesis. By identifying the cellular origin of high affinity IgE and the clonal selection of high affinity memory B cells into the plasma cell fate, our findings provide fundamental insights into the pathogenesis of allergies, and on the mechanisms of antibody production in memory B cell responses.IgE is an important mediator of protective immunity as well as allergic reaction, but how high affinity IgE antibodies are produced in memory responses is not clear. Here the authors show that IgE can be generated via class-switch recombination in IgG1 memory B cells without additional somatic hypermutation.
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Affiliation(s)
- Jin-Shu He
- Singapore Immunology Network (SIgN), 8A Biomedical Grove, Singapore, 138648, Singapore
| | - Sharrada Subramaniam
- Singapore Immunology Network (SIgN), 8A Biomedical Grove, Singapore, 138648, Singapore
- School of Biological Sciences, Nanyang Technological University, 60 Nanyang Drive, Singapore, 637551, Singapore
| | - Vipin Narang
- Singapore Immunology Network (SIgN), 8A Biomedical Grove, Singapore, 138648, Singapore
| | | | - Sean P Saunders
- Division of Pulmonary, Critical Care and Sleep Medicine, Departments of Medicine and Cell Biology, New York University School of Medicine, 550 First Ave, New York, 10016, USA
| | - Daniel Carbajo
- Singapore Immunology Network (SIgN), 8A Biomedical Grove, Singapore, 138648, Singapore
| | - Tsao Wen-Shan
- Singapore Immunology Network (SIgN), 8A Biomedical Grove, Singapore, 138648, Singapore
| | - Nur Hidayah Hamadee
- Singapore Immunology Network (SIgN), 8A Biomedical Grove, Singapore, 138648, Singapore
| | - Josephine Lum
- Singapore Immunology Network (SIgN), 8A Biomedical Grove, Singapore, 138648, Singapore
| | - Andrea Lee
- Singapore Immunology Network (SIgN), 8A Biomedical Grove, Singapore, 138648, Singapore
| | - Jinmiao Chen
- Singapore Immunology Network (SIgN), 8A Biomedical Grove, Singapore, 138648, Singapore
| | - Michael Poidinger
- Singapore Immunology Network (SIgN), 8A Biomedical Grove, Singapore, 138648, Singapore
| | - Francesca Zolezzi
- Singapore Immunology Network (SIgN), 8A Biomedical Grove, Singapore, 138648, Singapore
- Galderma R&D, Les Templiers, 2400 route des Colles, Sophia Antipolis, 06410, Biot, France
| | - Juan J Lafaille
- Skirball Institute and Department of Pathology, New York University School of Medicine, 540 First Ave, New York, 10016, USA
| | - Maria A Curotto de Lafaille
- Singapore Immunology Network (SIgN), 8A Biomedical Grove, Singapore, 138648, Singapore.
- Division of Pulmonary, Critical Care and Sleep Medicine, Departments of Medicine and Cell Biology, New York University School of Medicine, 550 First Ave, New York, 10016, USA.
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77
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IgH isotype-specific B cell receptor expression influences B cell fate. Proc Natl Acad Sci U S A 2017; 114:E8411-E8420. [PMID: 28923960 DOI: 10.1073/pnas.1704962114] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023] Open
Abstract
Ig heavy chain (IgH) isotypes (e.g., IgM, IgG, and IgE) are generated as secreted/soluble antibodies (sIg) or as membrane-bound (mIg) B cell receptors (BCRs) through alternative RNA splicing. IgH isotype dictates soluble antibody function, but how mIg isotype influences B cell behavior is not well defined. We examined IgH isotype-specific BCR function by analyzing naturally switched B cells from wild-type mice, as well as by engineering polyclonal Ighγ1/γ1 and Ighε/ε mice, which initially produce IgG1 or IgE from their respective native genomic configurations. We found that B cells from wild-type mice, as well as Ighγ1/γ1 and Ighε/ε mice, produce transcripts that generate IgM, IgG1, and IgE in an alternative splice form bias hierarchy, regardless of cell stage. In this regard, we found that mIgμ > mIgγ1 > mIgε, and that these BCR expression differences influence respective developmental fitness. Restrained B cell development from Ighγ1/γ1 and Ighε/ε mice was proportional to sIg/mIg ratios and was rescued by enforced expression of the respective mIgs. In addition, artificially enhancing BCR signal strength permitted IgE+ memory B cells-which essentially do not exist under normal conditions-to provide long-lived memory function, suggesting that quantitative BCR signal weakness contributes to restraint of IgE B cell responses. Our results indicate that IgH isotype-specific mIg/BCR dosage may play a larger role in B cell fate than previously anticipated.
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78
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Oettgen HC. Fifty years later: Emerging functions of IgE antibodies in host defense, immune regulation, and allergic diseases. J Allergy Clin Immunol 2017; 137:1631-1645. [PMID: 27263999 DOI: 10.1016/j.jaci.2016.04.009] [Citation(s) in RCA: 63] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2016] [Revised: 04/22/2016] [Accepted: 04/22/2016] [Indexed: 01/15/2023]
Abstract
Fifty years ago, after a long search, IgE emerged as the circulating factor responsible for triggering allergic reactions. Its extremely low concentration in plasma created significant hurdles for scientists working to reveal its identity. We now know that IgE levels are invariably increased in patients affected by atopic conditions and that IgE provides the critical link between the antigen recognition role of the adaptive immune system and the effector functions of mast cells and basophils at mucosal and cutaneous sites of environmental exposure. This review discusses the established mechanisms of action of IgE in pathologic immediate hypersensitivity, as well as its multifaceted roles in protective immunity, control of mast cell homeostasis, and its more recently revealed immunomodulatory functions.
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Affiliation(s)
- Hans C Oettgen
- Division of Immunology, Boston Children's Hospital, and the Department of Pediatrics, Harvard Medical School, Boston, Mass.
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79
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Meli AP, Fontés G, Leung Soo C, King IL. T Follicular Helper Cell-Derived IL-4 Is Required for IgE Production during Intestinal Helminth Infection. THE JOURNAL OF IMMUNOLOGY 2017; 199:244-252. [PMID: 28533444 DOI: 10.4049/jimmunol.1700141] [Citation(s) in RCA: 74] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Abstract] [Subscribe] [Scholar Register] [Received: 01/26/2017] [Accepted: 04/27/2017] [Indexed: 12/15/2022]
Abstract
IgE production plays a crucial role in protective as well as pathogenic type 2 immune responses. Although the cytokine IL-4 is required for the development of IgE-producing plasma cells, the source of IL-4 and cellular requirements for optimal IgE responses remain unclear. Recent evidence suggests that T follicular helper (Tfh) cells are the primary producer of IL-4 in the reactive lymph node during type 2 immune responses. As Tfh cells are also required for the development of plasmablasts derived from germinal center and extrafollicular sources, we hypothesized that this cell subset is essential for the IgE plasmablast response. In this study, we show that during intestinal helminth infection, IL-4 derived from Tfh cells is required for IgE class switching and plasmablast formation. Notably, early IgE class switching did not require germinal center formation. Additionally, Tfh cell-derived IL-4 was required to maintain the Th2 response in the mesenteric lymph nodes of infected mice. Collectively, our results indicate that IL-4-producing Tfh cells are central orchestrators of the type 2 immune response in the reactive lymph nodes during parasitic helminth infection.
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Affiliation(s)
- Alexandre P Meli
- Department of Microbiology and Immunology, Microbiome and Disease Tolerance Centre, McGill University, Montreal, Quebec H3A 2B4, Canada
| | - Ghislaine Fontés
- Department of Microbiology and Immunology, Microbiome and Disease Tolerance Centre, McGill University, Montreal, Quebec H3A 2B4, Canada
| | - Cindy Leung Soo
- Department of Microbiology and Immunology, Microbiome and Disease Tolerance Centre, McGill University, Montreal, Quebec H3A 2B4, Canada
| | - Irah L King
- Department of Microbiology and Immunology, Microbiome and Disease Tolerance Centre, McGill University, Montreal, Quebec H3A 2B4, Canada
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80
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Phan TG, Tangye SG. Memory B cells: total recall. Curr Opin Immunol 2017; 45:132-140. [PMID: 28363157 DOI: 10.1016/j.coi.2017.03.005] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2016] [Revised: 12/27/2016] [Accepted: 03/02/2017] [Indexed: 12/18/2022]
Abstract
Immunological memory is a cornerstone of adaptive immune responses in higher vertebrates. The remarkable ability to generate memory cells following Ag exposure, in the context of natural infection or immunization, provides long-lived protection against infectious diseases, often for the hosts' lifetime. Indeed, the generation of memory B cells and long-lived plasma cells underpins the success of most vaccines. The concept of immunological memory is not new-it was first proposed nearly 2500 years ago. While our understanding of the complexities of humoral and cell-mediated memory continues to evolve, important aspects of this process remain unresolved. Here, we will provide an overview of recent advances in B-cell memory in mice and humans, and in health and disease.
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Affiliation(s)
- Tri Giang Phan
- Immunology Division, Garvan Institute of Medical Research, Darlinghurst, NSW, Australia; St Vincent's Clinical School, University of NSW, Australia.
| | - Stuart G Tangye
- Immunology Division, Garvan Institute of Medical Research, Darlinghurst, NSW, Australia; St Vincent's Clinical School, University of NSW, Australia.
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81
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Jiménez-Saiz R, Chu DK, Mandur TS, Walker TD, Gordon ME, Chaudhary R, Koenig J, Saliba S, Galipeau HJ, Utley A, King IL, Lee K, Ettinger R, Waserman S, Kolbeck R, Jordana M. Lifelong memory responses perpetuate humoral T H2 immunity and anaphylaxis in food allergy. J Allergy Clin Immunol 2017; 140:1604-1615.e5. [PMID: 28216433 DOI: 10.1016/j.jaci.2017.01.018] [Citation(s) in RCA: 77] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2016] [Revised: 01/10/2017] [Accepted: 01/26/2017] [Indexed: 12/17/2022]
Abstract
BACKGROUND A number of food allergies (eg, fish, shellfish, and nuts) are lifelong, without any disease-transforming therapies, and unclear in their underlying immunology. Clinical manifestations of food allergy are largely mediated by IgE. Although persistent IgE titers have been attributed conventionally to long-lived IgE+ plasma cells (PCs), this has not been directly and comprehensively tested. OBJECTIVE We sought to evaluate mechanisms underlying persistent IgE and allergic responses to food allergens. METHODS We used a model of peanut allergy and anaphylaxis, various knockout mice, adoptive transfer experiments, and in vitro assays to identify mechanisms underlying persistent IgE humoral immunity over almost the entire lifespan of the mouse (18-20 months). RESULTS Contrary to conventional paradigms, our data show that clinically relevant lifelong IgE titers are not sustained by long-lived IgE+ PCs. Instead, lifelong reactivity is conferred by allergen-specific long-lived memory B cells that replenish the IgE+ PC compartment. B-cell reactivation requires allergen re-exposure and IL-4 production by CD4 T cells. We define the half-lives of antigen-specific germinal centers (23.3 days), IgE+ and IgG1+ PCs (60 and 234.4 days, respectively), and clinically relevant cell-bound IgE (67.3 days). CONCLUSIONS These findings can explain lifelong food allergies observed in human subjects as the consequence of allergen exposures that recurrently activate memory B cells and identify these as a therapeutic target with disease-transforming potential.
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Affiliation(s)
- Rodrigo Jiménez-Saiz
- McMaster Immunology Research Centre (MIRC), Department of Pathology & Molecular Medicine, McMaster University, Hamilton, Ontario, Canada
| | - Derek K Chu
- McMaster Immunology Research Centre (MIRC), Department of Pathology & Molecular Medicine, McMaster University, Hamilton, Ontario, Canada
| | - Talveer S Mandur
- McMaster Immunology Research Centre (MIRC), Department of Pathology & Molecular Medicine, McMaster University, Hamilton, Ontario, Canada
| | - Tina D Walker
- McMaster Immunology Research Centre (MIRC), Department of Pathology & Molecular Medicine, McMaster University, Hamilton, Ontario, Canada
| | - Melissa E Gordon
- McMaster Immunology Research Centre (MIRC), Department of Pathology & Molecular Medicine, McMaster University, Hamilton, Ontario, Canada
| | - Roopali Chaudhary
- McMaster Immunology Research Centre (MIRC), Department of Pathology & Molecular Medicine, McMaster University, Hamilton, Ontario, Canada
| | - Joshua Koenig
- McMaster Immunology Research Centre (MIRC), Department of Pathology & Molecular Medicine, McMaster University, Hamilton, Ontario, Canada
| | - Sarah Saliba
- McMaster Immunology Research Centre (MIRC), Department of Pathology & Molecular Medicine, McMaster University, Hamilton, Ontario, Canada
| | - Heather J Galipeau
- McMaster Immunology Research Centre (MIRC), Department of Pathology & Molecular Medicine, McMaster University, Hamilton, Ontario, Canada
| | - Adam Utley
- Departments of Immunology and Medicine, Roswell Park Cancer Institute, Buffalo, NY
| | - Irah L King
- Department of Microbiology & Immunology, McGill University, Montreal, Quebec, Canada
| | - Kelvin Lee
- Departments of Immunology and Medicine, Roswell Park Cancer Institute, Buffalo, NY
| | - Rachel Ettinger
- Department of Respiratory, Inflammation & Autoimmunity, MedImmune, Gaithersburg, Md
| | - Susan Waserman
- Department of Medicine, McMaster University, Hamilton, Ontario, Canada
| | - Roland Kolbeck
- Department of Respiratory, Inflammation & Autoimmunity, MedImmune, Gaithersburg, Md
| | - Manel Jordana
- McMaster Immunology Research Centre (MIRC), Department of Pathology & Molecular Medicine, McMaster University, Hamilton, Ontario, Canada.
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Development of chronic allergic responses by dampening Bcl6-mediated suppressor activity in memory T helper 2 cells. Proc Natl Acad Sci U S A 2017; 114:E741-E750. [PMID: 28096407 DOI: 10.1073/pnas.1613528114] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
Mice deficient in the transcriptional repressor B-cell CLL/lymphoma 6 (Bcl6) exhibit similar T helper 2 (TH2) immune responses as patients with allergic diseases. However, the molecular mechanisms underlying Bcl6-directed regulation of TH2 cytokine genes remain unclear. We identified multiple Bcl6/STAT binding sites (BSs) in TH2 cytokine gene loci. We found that Bcl6 is modestly associated with the BSs, and it had no significant effect on cytokine production in newly differentiated TH2 cells. Contrarily, in memory TH2 (mTH2) cells derived from adaptively transferred TH2 effectors, Bcl6 outcompeted STAT5 for binding to TH2 cytokine gene loci, particularly Interleukin4 (Il4) loci, and attenuated GATA binding protein 3 (GATA3) binding to highly conserved intron enhancer regions in mTH2 cells. Bcl6 suppressed cytokine production epigenetically in mTH2 cells to negatively tune histone acetylation at TH2 cytokine gene loci, including Il4 loci. In addition, IL-33, a pro-TH2 cytokine, diminished Bcl6's association with loci to which GATA3 recruitment was inversely augmented, resulting in altered IL-4, but not IL-5 and IL-13, production in mTH2 cells but no altered production in newly differentiated TH2 cells. Use of a murine asthma model that generates high levels of pro-TH2 cytokines, such as IL-33, suggested that the suppressive function of Bcl6 in mTH2 cells is abolished in severe asthma. These findings indicate a role of the interaction between TH2-promoting factors and Bcl6 in promoting appropriate IL-4 production in mTH2 cells and suggest that chronic allergic diseases involve the TH2-promoting factor-mediated functional breakdown of Bcl6, resulting in allergy exacerbation.
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83
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Narayanan M, Freidl R, Focke-Tejkl M, Baranyi U, Wekerle T, Valenta R, Linhart B. A B Cell Epitope Peptide Derived from the Major Grass Pollen Allergen Phl p 1 Boosts Allergen-Specific Secondary Antibody Responses without Allergen-Specific T Cell Help. THE JOURNAL OF IMMUNOLOGY 2017; 198:1685-1695. [PMID: 28093528 PMCID: PMC5292585 DOI: 10.4049/jimmunol.1501741] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/31/2015] [Accepted: 11/27/2016] [Indexed: 11/19/2022]
Abstract
More than 40% of allergic patients suffer from grass pollen allergy. Phl p 1, the major timothy grass pollen allergen, belongs to the cross-reactive group 1 grass pollen allergens that are thought to initiate allergic sensitization to grass pollen. Repeated allergen encounter boosts allergen-specific IgE production and enhances clinical sensitivity in patients. To investigate immunological mechanisms underlying the boosting of allergen-specific secondary IgE Ab responses and the allergen epitopes involved, a murine model for Phl p 1 was established. A B cell epitope–derived peptide of Phl p 1 devoid of allergen-specific T cell epitopes, as recognized by BALB/c mice, was fused to an allergen-unrelated carrier in the form of a recombinant fusion protein and used for sensitization. This fusion protein allowed the induction of allergen-specific IgE Ab responses without allergen-specific T cell help. Allergen-specific Ab responses were subsequently boosted with molecules containing the B cell epitope–derived peptide without carrier or linked to other allergen-unrelated carriers. Oligomeric peptide bound to a carrier different from that which had been used for sensitization boosted allergen-specific secondary IgE responses without a detectable allergen-specific T cell response. Our results indicate that allergen-specific secondary IgE Ab responses can be boosted by repetitive B cell epitopes without allergen-specific T cell help by cross-linking of the B cell epitope receptor. This finding has important implications for the design of new allergy vaccines.
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Affiliation(s)
- Meena Narayanan
- Division of Immunopathology, Department of Pathophysiology and Allergy Research, Center for Pathophysiology, Infectiology, and Immunology, Medical University of Vienna, 1090 Vienna, Austria; and
| | - Raphaela Freidl
- Division of Immunopathology, Department of Pathophysiology and Allergy Research, Center for Pathophysiology, Infectiology, and Immunology, Medical University of Vienna, 1090 Vienna, Austria; and
| | - Margarete Focke-Tejkl
- Division of Immunopathology, Department of Pathophysiology and Allergy Research, Center for Pathophysiology, Infectiology, and Immunology, Medical University of Vienna, 1090 Vienna, Austria; and
| | - Ulrike Baranyi
- Section of Transplantation Immunology, Department of Surgery, Medical University of Vienna, 1090 Vienna, Austria
| | - Thomas Wekerle
- Section of Transplantation Immunology, Department of Surgery, Medical University of Vienna, 1090 Vienna, Austria
| | - Rudolf Valenta
- Division of Immunopathology, Department of Pathophysiology and Allergy Research, Center for Pathophysiology, Infectiology, and Immunology, Medical University of Vienna, 1090 Vienna, Austria; and
| | - Birgit Linhart
- Division of Immunopathology, Department of Pathophysiology and Allergy Research, Center for Pathophysiology, Infectiology, and Immunology, Medical University of Vienna, 1090 Vienna, Austria; and
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84
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Elkuch M, Greiff V, Berger CT, Bouchenaki M, Daikeler T, Bircher A, Navarini AA, Heijnen I, Recher M. Low immunoglobulin E flags two distinct types of immune dysregulation. Clin Exp Immunol 2017; 187:345-352. [PMID: 28078662 DOI: 10.1111/cei.12885] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/10/2016] [Indexed: 10/20/2022] Open
Abstract
During the last two decades, hyper-immunoglobulin (Ig)E syndromes have been characterized clinically and molecularly in patients with genetically determined primary immunodeficiencies. However, the detection of low IgE levels, defined here as below detection limit in the routine clinical immunology laboratory, has received little attention. We analysed the association of serum IgA, IgM and IgG levels (including IgG subclasses) with low, normal or high serum IgE levels in patients evaluated in a single-centre out-patient immunodeficiency and allergy clinic. The correlation of serum IgE levels with IgG subclasses depended on the clinical phenotype. In patients with immunodeficiencies, IgE correlated with IgG2 and IgG4 but not with IgG3. In contrast, in patients referred for signs of allergy, IgE correlated with IgG3 but not with IgG2. A low IgE result was associated with low IgG3 and IgG4 in allergy referrals, while immunodeficiency referrals with a low IgE result had significantly lower IgG1, IgG2 and IgG4 levels. Hierarchical clustering of non-IgE immunoglobulin profiles (IgM, IgA, IgG, IgG1-4) validated that non-IgE immunoglobulin levels predict the clinic referral, i.e. phenotype, of low-IgE patients. These results suggesto guide the clinical management of patients with low serum IgE levels.
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Affiliation(s)
- M Elkuch
- Immunodeficiency Clinic, Medical Outpatient Unit and Immunodeficiency Laboratory, Department of Biomedicine, University Hospital Basel, Basel, Switzerland
| | - V Greiff
- Department of Biosystems Science and Engineering, ETH Zürich, Basel, Switzerland
| | - C T Berger
- Medical Outpatient Unit and Translational Immunology Laboratory, Department of Biomedicine, Basel, Switzerland
| | - M Bouchenaki
- Division of Medical Immunology, Laboratory Medicine, University Hospital Basel, Basel, Switzerland
| | - T Daikeler
- Rheumatology Clinic, University Hospital Basel, Basel, Switzerland
| | - A Bircher
- Allergy and Dermatology Clinic, University Hospital Basel, Basel
| | - A A Navarini
- Department of Dermatology, University Hospital Zurich, Zurich, Switzerland
| | - I Heijnen
- Division of Medical Immunology, Laboratory Medicine, University Hospital Basel, Basel, Switzerland
| | - M Recher
- Immunodeficiency Clinic, Medical Outpatient Unit and Immunodeficiency Laboratory, Department of Biomedicine, University Hospital Basel, Basel, Switzerland
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85
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Laffleur B, Basu U, Lim J. RNA Exosome and Non-coding RNA-Coupled Mechanisms in AID-Mediated Genomic Alterations. J Mol Biol 2017; 429:3230-3241. [PMID: 28069372 DOI: 10.1016/j.jmb.2016.12.021] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2016] [Revised: 12/21/2016] [Accepted: 12/27/2016] [Indexed: 12/31/2022]
Abstract
The eukaryotic RNA exosome is a well-conserved protein complex with ribonuclease activity implicated in RNA metabolism. Various families of non-coding RNAs have been identified as substrates of the complex, underscoring its role as a non-coding RNA processing/degradation unit. However, the role of RNA exosome and its RNA processing activity on DNA mutagenesis/alteration events have not been investigated until recently. B lymphocytes use two DNA alteration mechanisms, class switch recombination (CSR) and somatic hypermutation (SHM), to re-engineer their antibody gene expressing loci until a tailored antibody gene for a specific antigen is satisfactorily generated. CSR and SHM require the essential activity of the DNA activation-induced cytidine deaminase (AID). Causing collateral damage to the B-cell genome during CSR and SHM, AID induces unwanted (and sometimes oncogenic) mutations at numerous non-immunoglobulin gene sequences. Recent studies have revealed that AID's DNA mutator activity is regulated by the RNA exosome complex, thus providing an example of a mechanism that relates DNA mutagenesis to RNA processing. Here, we review the emergent functions of RNA exosome during CSR, SHM, and other chromosomal alterations in B cells, and discuss implications relevant to mechanisms that maintain B-cell genomic integrity.
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Affiliation(s)
- Brice Laffleur
- Department of Microbiology and Immunology, College of Physicians and Surgeons, Columbia University, New York, NY, USA
| | - Uttiya Basu
- Department of Microbiology and Immunology, College of Physicians and Surgeons, Columbia University, New York, NY, USA.
| | - Junghyun Lim
- Department of Microbiology and Immunology, College of Physicians and Surgeons, Columbia University, New York, NY, USA
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86
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Abstract
Germinal centers host a mini-evolutionary environment where B cells can mutate their receptor and be selected depending on its affinity to target antigens in a process called affinity maturation. Starting from founder cells with a weak B cell receptor affinity, germinal centers release output cells as antibody-secreting cells or memory cells with a very high affinity, a property which is essential for pathogen clearance and immune memory. Therapeutic interventions on the germinal centers are tantalizing approaches to improve vaccines or to support rejection of chronic pathogens such as HIV. However, the complexity of the selection processes makes it very hard to make reliable predictions. Here, we present in detail how to build an agent-based model (hyphasma), accounting for the dynamics of the germinal center. It encompasses the core quantitative traits of affinity maturation, and allowed to make reliable predictions in previous studies.
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Affiliation(s)
- Philippe A Robert
- Systems Immunology Department and Braunschweig Integrated Centre of Systems Biology, Helmholtz Centre for Infection Research, Inhoffenstr. 7, 38126, Braunschweig, Germany.
- Institut de Génétique Moléculaire de Montpellier, CNRS, UMR 5535, Université de Montpellier, 34293, Montpellier, France.
| | - Ananya Rastogi
- Systems Immunology Department and Braunschweig Integrated Centre of Systems Biology, Helmholtz Centre for Infection Research, Inhoffenstr. 7, 38126, Braunschweig, Germany
| | - Sebastian C Binder
- Systems Immunology Department and Braunschweig Integrated Centre of Systems Biology, Helmholtz Centre for Infection Research, Inhoffenstr. 7, 38126, Braunschweig, Germany
| | - Michael Meyer-Hermann
- Systems Immunology Department and Braunschweig Integrated Centre of Systems Biology, Helmholtz Centre for Infection Research, Inhoffenstr. 7, 38126, Braunschweig, Germany
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87
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88
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Initiation, Persistence and Exacerbation of Food Allergy. BIRKHÄUSER ADVANCES IN INFECTIOUS DISEASES 2017. [DOI: 10.1007/978-3-319-69968-4_7] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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89
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Ramadani F, Bowen H, Upton N, Hobson PS, Chan YC, Chen JB, Chang TW, McDonnell JM, Sutton BJ, Fear DJ, Gould HJ. Ontogeny of human IgE-expressing B cells and plasma cells. Allergy 2017; 72:66-76. [PMID: 27061189 PMCID: PMC5107308 DOI: 10.1111/all.12911] [Citation(s) in RCA: 42] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/05/2016] [Indexed: 12/31/2022]
Abstract
Background IgE‐expressing (IgE+) plasma cells (PCs) provide a continuous source of allergen‐specific IgE that is central to allergic responses. The extreme sparsity of IgE+ cells in vivo has confined their study almost entirely to mouse models. Objective To characterize the development pathway of human IgE+PCs and to determine the ontogeny of human IgE+PCs. Methods To generate human IgE+ cells, we cultured tonsil B cells with IL‐4 and anti‐CD40. Using FACS and RT‐PCR, we examined the phenotype of generated IgE+ cells, the capacity of tonsil B‐cell subsets to generate IgE+PCs and the class switching pathways involved. Results We have identified three phenotypic stages of IgE+PC development pathway, namely (i) IgE+germinal centre (GC)‐like B cells, (ii) IgE+PC‐like ‘plasmablasts’ and (iii) IgE+PCs. The same phenotypic stages were also observed for IgG1+ cells. Total tonsil B cells give rise to IgE+PCs by direct and sequential switching, whereas the isolated GC B‐cell fraction, the main source of IgE+PCs, generates IgE+PCs by sequential switching. PC differentiation of IgE+ cells is accompanied by the down‐regulation of surface expression of the short form of membrane IgE (mIgES), which is homologous to mouse mIgE, and the up‐regulation of the long form of mIgE (mIgEL), which is associated with an enhanced B‐cell survival and expressed in humans, but not in mice. Conclusion Generation of IgE+PCs from tonsil GC B cells occurs mainly via sequential switching from IgG. The mIgEL/mIgES ratio may be implicated in survival of IgE+ B cells during PC differentiation and allergic disease.
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Affiliation(s)
- F. Ramadani
- Randall Division of Cell and Molecular Biohphysics; King's College; London UK
- Medical Research Council and Asthma UK Centre in Allergic Mechanisms in Asthma; London UK
| | - H. Bowen
- Randall Division of Cell and Molecular Biohphysics; King's College; London UK
- Medical Research Council and Asthma UK Centre in Allergic Mechanisms in Asthma; London UK
| | - N. Upton
- Randall Division of Cell and Molecular Biohphysics; King's College; London UK
- Medical Research Council and Asthma UK Centre in Allergic Mechanisms in Asthma; London UK
| | - P. S. Hobson
- Division of Asthma; Allergy and Lung Biology; King's College; London UK
- Medical Research Council and Asthma UK Centre in Allergic Mechanisms in Asthma; London UK
| | - Y.-C. Chan
- Randall Division of Cell and Molecular Biohphysics; King's College; London UK
- Medical Research Council and Asthma UK Centre in Allergic Mechanisms in Asthma; London UK
| | - J.-B. Chen
- Genomics Research Center; Academia Sinica; Taipei Taiwan
| | - T. W. Chang
- Genomics Research Center; Academia Sinica; Taipei Taiwan
| | - J. M. McDonnell
- Randall Division of Cell and Molecular Biohphysics; King's College; London UK
- Medical Research Council and Asthma UK Centre in Allergic Mechanisms in Asthma; London UK
| | - B. J. Sutton
- Randall Division of Cell and Molecular Biohphysics; King's College; London UK
- Medical Research Council and Asthma UK Centre in Allergic Mechanisms in Asthma; London UK
| | - D. J. Fear
- Division of Asthma; Allergy and Lung Biology; King's College; London UK
- Medical Research Council and Asthma UK Centre in Allergic Mechanisms in Asthma; London UK
| | - H. J. Gould
- Randall Division of Cell and Molecular Biohphysics; King's College; London UK
- Medical Research Council and Asthma UK Centre in Allergic Mechanisms in Asthma; London UK
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90
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Wu YL, Stubbington MJT, Daly M, Teichmann SA, Rada C. Intrinsic transcriptional heterogeneity in B cells controls early class switching to IgE. J Exp Med 2016; 214:183-196. [PMID: 27994069 PMCID: PMC5206502 DOI: 10.1084/jem.20161056] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2016] [Revised: 09/27/2016] [Accepted: 11/13/2016] [Indexed: 12/11/2022] Open
Abstract
Combining novel mouse reporters and single-cell transcriptomic analyses, Wu et al. uncover differential activation thresholds for the transcripts that direct antibody class switching to IgE versus IgG1 in response to IL-4 and explain how cell-intrinsic transcriptional heterogeneity governs CSR. Noncoding transcripts originating upstream of the immunoglobulin constant region (I transcripts) are required to direct activation-induced deaminase to initiate class switching in B cells. Differential regulation of Iε and Iγ1 transcription in response to interleukin 4 (IL-4), hence class switching to IgE and IgG1, is not fully understood. In this study, we combine novel mouse reporters and single-cell RNA sequencing to reveal the heterogeneity in IL-4–induced I transcription. We identify an early population of cells expressing Iε but not Iγ1 and demonstrate that early Iε transcription leads to switching to IgE and occurs at lower activation levels than Iγ1. Our results reveal how probabilistic transcription with a lower activation threshold for Iε directs the early choice of IgE versus IgG1, a key physiological response against parasitic infestations and a mediator of allergy and asthma.
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Affiliation(s)
- Yee Ling Wu
- Medical Research Council Laboratory of Molecular Biology, Cambridge CB2 0QH, England, UK
| | | | - Maria Daly
- Medical Research Council Laboratory of Molecular Biology, Cambridge CB2 0QH, England, UK
| | - Sarah A Teichmann
- The Wellcome Trust Sanger Institute, Cambridge CB10 1SA, England, UK
| | - Cristina Rada
- Medical Research Council Laboratory of Molecular Biology, Cambridge CB2 0QH, England, UK
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Moutsoglou DM, Dreskin SC. B cells establish, but do not maintain, long-lived murine anti-peanut IgE(a). Clin Exp Allergy 2016; 46:640-53. [PMID: 27021119 DOI: 10.1111/cea.12715] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2015] [Revised: 10/25/2015] [Accepted: 01/05/2016] [Indexed: 01/23/2023]
Abstract
BACKGROUND Peanut allergy (PNA) has been reported to be transferred to tolerant recipients through organ and bone marrow (BM) transplantation. The roles T and B cells play in establishing, and the roles B cell subsets play in maintaining lifelong anti-peanut IgE levels are unknown. OBJECTIVES To determine the cellular requirements for the transfer of murine PNA and to determine the role CD20(+) cells play in maintaining long-lived anti-peanut IgE levels. METHODS We developed a novel adoptive transfer model to investigate the cellular requirements for transferring murine PNA. We also treated peanut-allergic (PA) mice with anti-CD20 antibody and measured IgE levels throughout treatment. RESULTS Purified B220(+) cells from PA splenocytes and purified CD4(+) cells from naïve (NA) splenocytes are the minimal requirements for the adoptive transfer of PNA. Prolonged treatment of allergic mice with anti-CD20 antibody results in significant depletion of B cell subsets but does not affect anti-peanut IgE levels, symptoms, or numbers of IgE antibody secreting cells (ASCs) in the BM. Adoptive transfer of BM and spleen cells from allergic donors treated with anti-CD20 antibody does not result in the transfer of PNA in NA recipients, demonstrating that anti-CD20 antibody treatment depletes B cells capable of differentiating into peanut-specific IgE ASCs. CONCLUSIONS AND CLINICAL RELEVANCE Peanut allergy can be established in a NA hosts with B220(+) cells from PA donors and CD4(+) cells from peanut-NA donors. However, long-term depletion of B220(+) cells with anti-CD20 antibody does not affect anti-peanut IgE levels. These results highlight a novel role for B cells in the development of PNA and provide evidence that long-lived anti-peanut IgE levels may be maintained by long-lived ASCs.
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Affiliation(s)
- D M Moutsoglou
- Division of Allergy and Clinical Immunology, Departments of Medicine and Immunology, University of Colorado Denver, Aurora, CO, USA
| | - S C Dreskin
- Division of Allergy and Clinical Immunology, Departments of Medicine and Immunology, University of Colorado Denver, Aurora, CO, USA
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92
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Yang Z, Robinson MJ, Chen X, Smith GA, Taunton J, Liu W, Allen CDC. Regulation of B cell fate by chronic activity of the IgE B cell receptor. eLife 2016; 5. [PMID: 27935477 PMCID: PMC5207771 DOI: 10.7554/elife.21238] [Citation(s) in RCA: 61] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2016] [Accepted: 12/08/2016] [Indexed: 12/13/2022] Open
Abstract
IgE can trigger potent allergic responses, yet the mechanisms regulating IgE production are poorly understood. Here we reveal that IgE+ B cells are constrained by chronic activity of the IgE B cell receptor (BCR). In the absence of cognate antigen, the IgE BCR promoted terminal differentiation of B cells into plasma cells (PCs) under cell culture conditions mimicking T cell help. This antigen-independent PC differentiation involved multiple IgE domains and Syk, CD19, BLNK, Btk, and IRF4. Disruption of BCR signaling in mice led to consistently exaggerated IgE+ germinal center (GC) B cell but variably increased PC responses. We were unable to confirm reports that the IgE BCR directly promoted intrinsic apoptosis. Instead, IgE+ GC B cells exhibited poor antigen presentation and prolonged cell cycles, suggesting reduced competition for T cell help. We propose that chronic BCR activity and access to T cell help play critical roles in regulating IgE responses. DOI:http://dx.doi.org/10.7554/eLife.21238.001 Antibodies are proteins that recognize and bind to specific molecules, and so help the immune system to defend the body against foreign substances that are potentially harmful. In some cases, harmless substances – such as pollen, dust or food – can trigger this response and lead to an allergic reaction. A type of antibody called immunoglobulin E (IgE) is particularly likely to trigger an allergic response. In general, immune cells called plasma cells produce antibodies and release them into the body. However, in B cells – the cells from which plasma cells develop – the antibodies remain on the surface of the cells. Here, the antibody acts as a “receptor” that allows the B cell to tell when its antibody has bound to a specific substance. Generally, B cells only activate when their B cell receptors bind to a specific substance. This binding triggers signals inside the cell that determine its fate – such as whether it will develop into a plasma cell. Recent studies have shown that B cells that have IgE on their surface (IgE+ B cells) are predisposed to develop rapidly into plasma cells. To investigate why this is the case, Yang et al. have now studied B cells both in cell culture and in mice. The results show that the IgE B cell receptor autonomously signals to the cell even when it is not bound to a specific substance, in a manner that differs from other types of B cell receptors. This increases the likelihood that the IgE+ B cell will develop into a plasma cell and limits the competitive fitness of IgE+ B cells. These findings provide new insights into how IgE responses are regulated by the B cell receptor. The next step will be to determine, at a molecular level, the basis for the autonomous signaling produced by the IgE B cell receptor when it is not bound to a specific substance. It will then be possible to investigate how this mechanism compares with the way that signals are normally transmitted when a B cell receptor binds to a specific substance. DOI:http://dx.doi.org/10.7554/eLife.21238.002
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Affiliation(s)
- Zhiyong Yang
- Cardiovascular Research Institute, University of California, San Francisco, San Francisco, United States.,Sandler Asthma Basic Research Center, University of California, San Francisco, San Francisco, United States
| | - Marcus J Robinson
- Cardiovascular Research Institute, University of California, San Francisco, San Francisco, United States.,Sandler Asthma Basic Research Center, University of California, San Francisco, San Francisco, United States
| | - Xiangjun Chen
- MOE Key Laboratory of Protein Sciences, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, School of Life Sciences, Institute for Immunology, Tsinghua University, Beijing, China
| | - Geoffrey A Smith
- Department of Cellular and Molecular Pharmacology, University of California, San Francisco, San Francisco, United States
| | - Jack Taunton
- Department of Cellular and Molecular Pharmacology, University of California, San Francisco, San Francisco, United States
| | - Wanli Liu
- MOE Key Laboratory of Protein Sciences, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, School of Life Sciences, Institute for Immunology, Tsinghua University, Beijing, China
| | - Christopher D C Allen
- Cardiovascular Research Institute, University of California, San Francisco, San Francisco, United States.,Sandler Asthma Basic Research Center, University of California, San Francisco, San Francisco, United States.,Department of Anatomy, University of California, San Francisco, San Francisco, United States
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93
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Moutsoglou DM, Dreskin SC. Prolonged Treatment of Peanut-Allergic Mice with Bortezomib Significantly Reduces Serum Anti-Peanut IgE but Does Not Affect Allergic Symptoms. Int Arch Allergy Immunol 2016; 170:257-261. [PMID: 27705966 DOI: 10.1159/000449247] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2016] [Accepted: 08/16/2016] [Indexed: 12/22/2022] Open
Abstract
BACKGROUND Anti-peanut immunoglobulin E (anti-Pn IgE) can persist throughout life, suggesting that this condition could be maintained by long-lived antibody-secreting cells (ASCs). To determine the role of long-lived ASCs, peanut-allergic mice underwent prolonged treatment with the proteasome inhibitor, bortezomib (Bz). METHODS Intravenous Bz was given twice weekly for 21 weeks to peanut-allergic mice. During treatment, serum anti-Pn IgE was measured, and the mice were rechallenged at the end of treatment. Cell populations were measured, and Pn-specific IgG, total IgG, and total IgE ASCs were enumerated in the bone marrow (BM) and spleen (SPL). RESULTS Prolonged treatment with Bz significantly reduced serum anti-Pn IgE and IgG1 but did not affect symptoms following challenge with Pn, even in mice with undetectable serum anti-Pn IgE. Numbers of CD138+ cells were significantly reduced in the BM but were unaffected in the SPL. Unexpectedly, Bz did not affect numbers of Pn-specific IgG, total IgG, or total IgE ASCs in either the BM or SPL. CONCLUSIONS Cells that maintain long-lived serum anti-Pn IgE are sensitive to Bz. However, prolonged depletion of serum Pn-specific IgE does not result in a decrease of symptoms following challenge with Pn.
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Affiliation(s)
- Daphne M Moutsoglou
- Division of Allergy and Clinical Immunology and Departments of Medicine and Immunology, University of Colorado Denver, Aurora, Colo., USA
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94
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Mesin L, Ersching J, Victora GD. Germinal Center B Cell Dynamics. Immunity 2016; 45:471-482. [PMID: 27653600 PMCID: PMC5123673 DOI: 10.1016/j.immuni.2016.09.001] [Citation(s) in RCA: 646] [Impact Index Per Article: 80.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2016] [Revised: 06/07/2016] [Accepted: 06/08/2016] [Indexed: 01/01/2023]
Abstract
Germinal centers (GCs) are the site of antibody diversification and affinity maturation and as such are vitally important for humoral immunity. The study of GC biology has undergone a renaissance in the past 10 years, with a succession of findings that have transformed our understanding of the cellular dynamics of affinity maturation. In this review, we discuss recent developments in the field, with special emphasis on how GC cellular and clonal dynamics shape antibody affinity and diversity during the immune response.
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Affiliation(s)
- Luka Mesin
- Whitehead Institute for Biomedical Research, Cambridge, MA 02142, USA
| | - Jonatan Ersching
- Whitehead Institute for Biomedical Research, Cambridge, MA 02142, USA
| | - Gabriel D Victora
- Whitehead Institute for Biomedical Research, Cambridge, MA 02142, USA.
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95
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Differentiate or die! Nat Immunol 2016; 17:1007-8. [PMID: 27540982 DOI: 10.1038/ni.3531] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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96
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Autonomous membrane IgE signaling prevents IgE-memory formation. Nat Immunol 2016; 17:1109-17. [PMID: 27428827 DOI: 10.1038/ni.3508] [Citation(s) in RCA: 77] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2016] [Accepted: 06/02/2016] [Indexed: 12/14/2022]
Abstract
Aberrant production of IgE antibodies can lead to allergic diseases. Normally, IgE(+) B cells rarely differentiate into memory B cells (Bmem) or long-lived plasma cells (LLPCs), as they only transiently participate in the germinal center (GC), but the mechanism behind this remains elusive. We found that membrane IgE (mIgE) autonomously triggered rapid plasma-cell differentiation and apoptosis independently of antigen or cellular context, predominantly through the mutually independent CD19-PI3K-Akt-IRF4 and BLNK-Jnk/p38 pathways, respectively, and we identified the ectodomains of mIgE as being responsible. Accordingly, deregulated GC IgE(+) B cell proliferation and prolonged IgE production with exaggerated anaphylaxis were observed in CD19- and BLNK-deficient mice. Our findings reveal an autonomous mIgE signaling mechanism that normally prevents IgE(+) Bmem and LLPC formation, providing insights into the molecular pathogenesis of allergic diseases.
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97
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Noble A, Zhao J. Follicular helper T cells are responsible for IgE responses to Der p 1 following house dust mite sensitization in mice. Clin Exp Allergy 2016; 46:1075-82. [PMID: 27138589 DOI: 10.1111/cea.12750] [Citation(s) in RCA: 42] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2015] [Revised: 02/18/2016] [Accepted: 04/28/2016] [Indexed: 12/19/2022]
Abstract
BACKGROUND Th2 cells have long been considered responsible for the switching of B cells to production of IgE during cognate interaction, primarily due to their expression of CD40L and secretion of IL-4. This concept has been challenged by the more recent definition of follicular helper T cells (Tfh) as the key T cell subset in B cell isotype switching, due to their physical location at the boundary of T cell:B cell areas in lymphoid follicles and ability to express IL-4 and CD40L. OBJECTIVE To determine whether Tfh cells are responsible for IgE responses to Der p 1 allergen after house dust mite (HDM)-induced allergic sensitization. METHODS Mice deficient in Tfh cells were sensitized to HDM and Der p 1-specific IgE measured by ELISA. RESULTS Mice with a mutation in T cell-expressed IL-6R were unable to expand Tfh populations after HDM sensitization, and their anti-Der p 1 IgE, IgG1 and total IgE responses were reduced by 80-90% compared with wild-type mice. These animals displayed unaltered lung Th2 and eosinophilic responses after intranasal HDM challenge and normal IL-4 production, but B cell infiltration of the airways was abrogated. CONCLUSIONS AND CLINICAL RELEVANCE Our data indicate that Tfh cells are largely responsible for switching B cells to IgE synthesis, most likely via an IgG1(+) intermediate. However, Th2 cells are the major source of IL-4 during HDM sensitization and this might contribute to IgE synthesis at a stage distal to Tfh-mediated isotype switching. The IL-6/follicular helper T cell pathway is a potential therapeutic target in allergic disease.
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Affiliation(s)
- A Noble
- MRC & Asthma UK Centre in Allergic Mechanisms of Asthma, King's College London, London, UK
| | - J Zhao
- MRC & Asthma UK Centre in Allergic Mechanisms of Asthma, King's College London, London, UK
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98
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Aalberse RC, Platts-Mills TA, Rispens T. The Developmental History of IgE and IgG4 Antibodies in Relation to Atopy, Eosinophilic Esophagitis, and the Modified TH2 Response. Curr Allergy Asthma Rep 2016; 16:45. [PMID: 27221343 PMCID: PMC5026408 DOI: 10.1007/s11882-016-0621-x] [Citation(s) in RCA: 56] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
A common reaction from anyone confronted with allergy is the question: what prevents universal allergy? We will discuss recent findings in the mouse system that have provided us with clues on why allergy is not more common. We will also address one crucial aspect of atopic allergy in humans, which is absent in most mouse model systems, an IgG/IgE ratio <10. We consider the typical mouse IgE response to be more closely related to the "modified TH2" response in humans. We will discuss the similarities and differences between the IgE and IgG4 response to allergens and an update on the IgG4 B cell, partly derived from studies on eosinophilic esophagitis and IgG4-related diseases.
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Affiliation(s)
- Rob C Aalberse
- Department of Immunopathology, Sanquin Research and Landsteiner Laboratory, Academic Medical Center, University of Amsterdam, P.O. Box 9190, 1006 AD, Amsterdam, The Netherlands.
| | - Thomas A Platts-Mills
- Division of Allergy and Immunology, University of Virginia, Charlottesville, VA, USA
| | - Theo Rispens
- Department of Immunopathology, Sanquin Research and Landsteiner Laboratory, Academic Medical Center, University of Amsterdam, P.O. Box 9190, 1006 AD, Amsterdam, The Netherlands
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99
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Krzyzak L, Seitz C, Urbat A, Hutzler S, Ostalecki C, Gläsner J, Hiergeist A, Gessner A, Winkler TH, Steinkasserer A, Nitschke L. CD83 Modulates B Cell Activation and Germinal Center Responses. JOURNAL OF IMMUNOLOGY (BALTIMORE, MD. : 1950) 2016; 196:3581-94. [PMID: 26983787 DOI: 10.4049/jimmunol.1502163] [Citation(s) in RCA: 55] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/06/2015] [Accepted: 02/18/2016] [Indexed: 12/16/2023]
Abstract
CD83 is a maturation marker for dendritic cells. In the B cell lineage, CD83 is expressed especially on activated B cells and on light zone B cells during the germinal center (GC) reaction. The function of CD83 during GC responses is unclear. CD83(-/-) mice have a strong reduction of CD4(+) T cells, which makes it difficult to analyze a functional role of CD83 on B cells during GC responses. Therefore, in the present study we generated a B cell-specific CD83 conditional knockout (CD83 B-cKO) model. CD83 B-cKO B cells show defective upregulation of MHC class II and CD86 expression and impaired proliferation after different stimuli. Analyses of GC responses after immunization with various Ags revealed a characteristic shift in dark zone and light zone B cell numbers, with an increase of B cells in the dark zone of CD83 B-cKO mice. This effect was not accompanied by alterations in the level of IgG immune responses or by major differences in affinity maturation. However, an enhanced IgE response was observed in CD83 B-cKO mice. Additionally, we observed a strong competitive disadvantage of CD83-cKO B cells in GC responses in mixed bone marrow chimeras. Furthermore, infection of mice with Borrelia burgdorferi revealed a defect in bacterial clearance of CD83 B-cKO mice with a shift toward a Th2 response, indicated by a strong increase in IgE titers. Taken together, our results show that CD83 is important for B cell activation and modulates GC composition and IgE Ab responses in vivo.
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Affiliation(s)
- Lena Krzyzak
- Department of Immune Modulation, University Hospital Erlangen, 91052 Erlangen, Germany
| | - Christine Seitz
- Department of Immune Modulation, University Hospital Erlangen, 91052 Erlangen, Germany
| | - Anne Urbat
- Division of Genetics, Department of Biology, University of Erlangen, 91058 Erlangen, Germany
| | - Stefan Hutzler
- Division of Genetics, Department of Biology, University of Erlangen, 91058 Erlangen, Germany
| | - Christian Ostalecki
- Department of Dermatology, University Hospital Erlangen, 91052 Erlangen, Germany
| | - Joachim Gläsner
- Institute for Medical Microbiology and Hygiene, University of Regensburg, 93053 Regensburg, Germany; and
| | - Andreas Hiergeist
- Institute for Medical Microbiology and Hygiene, University of Regensburg, 93053 Regensburg, Germany; and
| | - André Gessner
- Institute for Medical Microbiology and Hygiene, University of Regensburg, 93053 Regensburg, Germany; and
| | - Thomas H Winkler
- Division of Genetics, Nikolaus Fiebiger Center for Molecular Medicine, University of Erlangen, 91058 Erlangen, Germany
| | | | - Lars Nitschke
- Division of Genetics, Department of Biology, University of Erlangen, 91058 Erlangen, Germany;
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100
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Sharma Y, Ahmad A, Bashir S, Elahi A, Khan F. Implication of protein tyrosine phosphatase SHP-1 in cancer-related signaling pathways. Future Oncol 2016; 12:1287-98. [PMID: 26987952 DOI: 10.2217/fon-2015-0057] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The altered expression of SHP-1 (SH2 domain-containing protein tyrosine phosphatase) as a consequence of promoter hypermethylation or mutations has evidently been linked to cancer development. The notion of being a cancer drug target is conceivable as SHP-1 negatively regulates cell cycle and inflammatory pathways which are an inevitable part of oncogenic transformation. In the present review, we try to critically analyze the role of SHP-1 in cancer progression via regulating the above mentioned pathways with the major emphasis on cell cycle components and JAK/STAT pathway, commencing with the SHP-1 biology in immune cell signaling. Lastly, we have provided the future directions for researchers to encourage SHP-1 as a prognostic marker and curative target for this debilitating disease called as cancer.
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Affiliation(s)
- Yadhu Sharma
- Department of Biochemistry, Faculty of Science, Jamia Hamdard, New Delhi-110062, India
| | - Altaf Ahmad
- Department of Botany, Aligarh Muslim University, Aligarh, Uttar Pradesh-202002, India
| | - Samina Bashir
- Department of Biochemistry, Faculty of Science, Jamia Hamdard, New Delhi-110062, India
| | - Asif Elahi
- Centre for Cellular & Molecular Biology (Council for Scientific & Industrial Research), Uppal Road, Hyderabad, Telangana-500007, India
| | - Farah Khan
- Department of Biochemistry, Faculty of Science, Jamia Hamdard, New Delhi-110062, India
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