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Bueno-Díaz C, Zuurveld M, Ayechu-Muruzabal V, Korsten SGPJ, Martín-Pedraza L, Parrón-Ballesteros J, Redegeld F, Garssen J, Villalba M, Willemsen LEM. Mustard seed major allergen Sin a1 activates intestinal epithelial cells and also dendritic cells that drive type 2 immune responses. Food Funct 2024; 15:6488-6501. [PMID: 38804660 DOI: 10.1039/d4fo01980f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/29/2024]
Abstract
Mustard seeds belong to the food category of mandatory labelling due to the severe reactions they can trigger in allergic patients. However, the mechanisms underlying allergic sensitization to mustard seeds are poorly understood. The aim of this work is to study type 2 immune activation induced by the mustard seed major allergen Sin a1 via the intestinal mucosa, employing an in vitro model mimicking allergen exposure via the intestinal epithelial cells (IECs). Sin a1 was isolated from the total protein extract and exposed to IEC, monocyte derived dendritic cells (DCs) or IEC/DC co-cultures. A system of consecutive co-cultures was employed to study the generic capacity of Sin a1 to induce type 2 activation leading to sensitization: IEC/DC, DC/T-cell, T/B-cell and stem cell derived mast cells (MCs) derived from healthy donors. Immune profiles were determined by ELISA and flow cytometry. Sin a1 activated IEC and induced type-2 cytokine secretion in IEC/DC co-culture or DC alone (IL-15, IL-25 and TSLP), and primed DC induced type 2 T-cell skewing. IgG secretion in the T-cell/B-cell phase was enhanced in the presence of Sin a1 in the first stages of the co-culture. Anti-IgE did not induce degranulation but promoted IL-13 and IL-4 release by MC primed with the supernatant from B-cells co-cultured with Sin a1-IEC/DC or -DC primed T-cells. Sin a1 enhanced the release of type-2 inflammatory mediators by epithelial and dendritic cells; the latter instructed generic type-2 responses in T-cells that resulted in B-cell activation, and finally MC activation upon anti-IgE exposure. This indicates that via activation of IEC and/or DC, mustard seed allergen Sin a1 is capable of driving type 2 immunity which may lead to allergic sensitization.
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Affiliation(s)
- Cristina Bueno-Díaz
- Division of Pharmacology, Utrecht Institute for Pharmaceutical Sciences (UIPS), Utrecht University, Utrecht, The Netherlands.
| | - Marit Zuurveld
- Division of Pharmacology, Utrecht Institute for Pharmaceutical Sciences (UIPS), Utrecht University, Utrecht, The Netherlands.
| | - Verónica Ayechu-Muruzabal
- Division of Pharmacology, Utrecht Institute for Pharmaceutical Sciences (UIPS), Utrecht University, Utrecht, The Netherlands.
| | - Sandra G P J Korsten
- Division of Pharmacology, Utrecht Institute for Pharmaceutical Sciences (UIPS), Utrecht University, Utrecht, The Netherlands.
- Tiofarma B.V., Oud-Beijerland, The Netherlands
| | | | - Jorge Parrón-Ballesteros
- Department of Biochemistry and Molecular Biology, Complutense University of Madrid, Madrid, Spain
| | - Frank Redegeld
- Division of Pharmacology, Utrecht Institute for Pharmaceutical Sciences (UIPS), Utrecht University, Utrecht, The Netherlands.
| | - Johan Garssen
- Division of Pharmacology, Utrecht Institute for Pharmaceutical Sciences (UIPS), Utrecht University, Utrecht, The Netherlands.
- Danone Nutricia Research B.V., Utrecht, The Netherlands
| | - Mayte Villalba
- Department of Biochemistry and Molecular Biology, Complutense University of Madrid, Madrid, Spain
| | - Linette E M Willemsen
- Division of Pharmacology, Utrecht Institute for Pharmaceutical Sciences (UIPS), Utrecht University, Utrecht, The Netherlands.
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2
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Guyénard L, Tauber M, Debord-Peguet S, Berard F, Nosbaum A, Hacard F, Castells M, Nicolas JF. Case Report: Mast cell anergy: absence of symptoms after accidental re-exposure to amoxicillin/clavulanic acid 3 days after anaphylaxis. FRONTIERS IN ALLERGY 2024; 5:1366922. [PMID: 38529125 PMCID: PMC10961332 DOI: 10.3389/falgy.2024.1366922] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2024] [Accepted: 02/22/2024] [Indexed: 03/27/2024] Open
Abstract
Empty mast cell syndrome, also named post anaphylaxis mast cell anergy (PAMA), is a temporary state of loss of mast cell responsiveness after a severe immediate hypersensitivity reaction. In this study, we describe a case of PAMA after accidental re-exposure to amoxicillin in a patient who developed severe anaphylaxis to this drug three days earlier in the operating room. To our knowledge, this report is the second to document this phenomenon.
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Affiliation(s)
- Loris Guyénard
- Allergologie et Immunologie Clinique, Centre Hospitalier Lyon-Sud, Hospices Civils de Lyon, Lyon, France
- TeamEpidermal Immunity and Allergy, Centre International de Recherche en Infectiologie (CIRI)—Université Claude Bernard Lyon 1—Inserm U1111—CNRS—ENS, Lyon, France
| | - Marie Tauber
- Allergologie et Immunologie Clinique, Centre Hospitalier Lyon-Sud, Hospices Civils de Lyon, Lyon, France
- TeamEpidermal Immunity and Allergy, Centre International de Recherche en Infectiologie (CIRI)—Université Claude Bernard Lyon 1—Inserm U1111—CNRS—ENS, Lyon, France
| | - Sophie Debord-Peguet
- TeamEpidermal Immunity and Allergy, Centre International de Recherche en Infectiologie (CIRI)—Université Claude Bernard Lyon 1—Inserm U1111—CNRS—ENS, Lyon, France
- Service d’Anesthésie-Réanimation Civilo-Militaire, Hôpital Edouard Herriot, Hospices Civils de Lyon, Lyon, France
| | - Frédéric Berard
- Allergologie et Immunologie Clinique, Centre Hospitalier Lyon-Sud, Hospices Civils de Lyon, Lyon, France
- TeamEpidermal Immunity and Allergy, Centre International de Recherche en Infectiologie (CIRI)—Université Claude Bernard Lyon 1—Inserm U1111—CNRS—ENS, Lyon, France
| | - Audrey Nosbaum
- Allergologie et Immunologie Clinique, Centre Hospitalier Lyon-Sud, Hospices Civils de Lyon, Lyon, France
- TeamEpidermal Immunity and Allergy, Centre International de Recherche en Infectiologie (CIRI)—Université Claude Bernard Lyon 1—Inserm U1111—CNRS—ENS, Lyon, France
| | - Florence Hacard
- Allergologie et Immunologie Clinique, Centre Hospitalier Lyon-Sud, Hospices Civils de Lyon, Lyon, France
- TeamEpidermal Immunity and Allergy, Centre International de Recherche en Infectiologie (CIRI)—Université Claude Bernard Lyon 1—Inserm U1111—CNRS—ENS, Lyon, France
| | - Mariana Castells
- Drug Hypersensitivity and Desensitization Center, Mastocytosis Center, Brigham and Women’s Hospital and Harvard Medical School, Boston, MA, United States
| | - Jean-François Nicolas
- Allergologie et Immunologie Clinique, Centre Hospitalier Lyon-Sud, Hospices Civils de Lyon, Lyon, France
- TeamEpidermal Immunity and Allergy, Centre International de Recherche en Infectiologie (CIRI)—Université Claude Bernard Lyon 1—Inserm U1111—CNRS—ENS, Lyon, France
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3
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Suzuki R. [Mast Cell-Neutrophil Communication Regulates Allergic Diseases]. YAKUGAKU ZASSHI 2024; 144:483-488. [PMID: 38692921 DOI: 10.1248/yakushi.23-00154-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/03/2024]
Abstract
Allergic diseases (e.g., food allergies) are a growing problem, with increasing numbers of individuals experiencing them worldwide. Congruently, the adverse reactions (e.g., anaphylaxis) associated with the administration of vaccines against emerging infectious diseases such as coronavirus disease 2019 (COVID-19) have become a familiar problem. Allergic diseases, which have a wide variety of symptoms, are difficult to prevent or cure; treatment is currently limited to therapeutic drugs or allergen immunotherapy. Therefore, elucidating new allergic regulatory factors that control the allergic (i.e., mast cell) responses is important. While investigating the regulatory mechanisms of the wide range of allergic responses of mast cells, we found that the affinity of allergens to immunoglobin E (IgE) regulates allergic inflammation through the differences in the secretory responses of mast cells and the types and interactions of the cells infiltrating the tissues. Here, we present our recent findings regarding the affinity of allergens to IgE in regulating allergic inflammation, heterogeneous secretory granules inducing diverse secretory responses, and mast cells interacting with neutrophils, thereby regulating the various allergic responses.
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Affiliation(s)
- Ryo Suzuki
- Faculty of Pharmaceutical Sciences, Institute of Medical, Pharmaceutical and Health Sciences, Kanazawa University
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4
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Yeoh WJ, Krebs P. SHIP1 and its role for innate immune regulation-Novel targets for immunotherapy. Eur J Immunol 2023; 53:e2350446. [PMID: 37742135 DOI: 10.1002/eji.202350446] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2023] [Revised: 08/03/2023] [Accepted: 09/21/2023] [Indexed: 09/25/2023]
Abstract
Phosphoinositide-3-kinase/AKT (PI3K/AKT) signaling plays key roles in the regulation of cellular activity in both health and disease. In immune cells, this PI3K/AKT pathway is critically regulated by the phosphoinositide phosphatase SHIP1, which has been reported to modulate the function of most immune subsets. In this review, we summarize our current knowledge of SHIP1 with a focus on innate immune cells, where we reflect on the most pertinent aspects described in the current literature. We also present several small-molecule agonists and antagonists of SHIP1 developed over the last two decades, which have led to improved outcomes in several preclinical models of disease. We outline these promising findings and put them in relation to human diseases with unmet medical needs, where we discuss the most attractive targets for immune therapies based on SHIP1 modulation.
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Affiliation(s)
- Wen Jie Yeoh
- Institute of Tissue Medicine and Pathology, University of Bern, Bern, Switzerland
- Graduate School for Cellular and Biomedical Sciences, University of Bern, Bern, Switzerland
| | - Philippe Krebs
- Institute of Tissue Medicine and Pathology, University of Bern, Bern, Switzerland
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5
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Waritani T, Lomax S, Cutler D, Chang J. Development and evaluation of mouse anti-Ara h 1 and Ara h 3 IgE monoclonal antibodies for advancing peanut allergy research. MethodsX 2023; 11:102470. [PMID: 38034322 PMCID: PMC10681920 DOI: 10.1016/j.mex.2023.102470] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2023] [Accepted: 10/31/2023] [Indexed: 12/02/2023] Open
Abstract
Immediate hypersensitivity reactions to peanuts are a considerable public health concern due to the acute and severe IgE mediated reactions. To conduct research on the pathogenesis and therapeutics of peanut allergies, it is imperative to have mouse anti-crude peanut extract (CPE) IgE monoclonal antibodies (mAbs) for both in-vitro and in-vivo assays. Without these tools, it is difficult to advance research in this field. In this study, four hybridomas producing anti-CPE IgE mAbs were developed and the IgE mAbs were validated using immune-blot analysis, Sandwich ELISA, Indirect ELISA, a cell-based assay using RBL-2H3 cells, and footpad type I hypersensitivity reaction studies in mice. The results indicate that two of the four mAbs can be effectively used for both in-vitro and in-vivo peanut allergy studies, as they induce allergic reactions with sensitization alone in mice. These novel anti-Ara h1 and Ara h 3 IgE mAbs, in combination with the detailed protocols outlined in this article, offer valuable guidance for studying acute allergic reactions involving mast cells across various platforms. With some considerations, the IgE mAbs can significantly advance peanut allergy research.
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Affiliation(s)
- Takaki Waritani
- Chondrex, Inc., 16928 Woodinville-Redmond Rd NE STE B101, Woodinville, WA 98072, USA
| | - Sidney Lomax
- Chondrex, Inc., 16928 Woodinville-Redmond Rd NE STE B101, Woodinville, WA 98072, USA
| | - Dawn Cutler
- Chondrex, Inc., 16928 Woodinville-Redmond Rd NE STE B101, Woodinville, WA 98072, USA
| | - Jessica Chang
- Chondrex, Inc., 16928 Woodinville-Redmond Rd NE STE B101, Woodinville, WA 98072, USA
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Capellmann S, Sonntag R, Schüler H, Meurer SK, Gan L, Kauffmann M, Horn K, Königs-Werner H, Weiskirchen R, Liedtke C, Huber M. Transformation of primary murine peritoneal mast cells by constitutive KIT activation is accompanied by loss of Cdkn2a/Arf expression. Front Immunol 2023; 14:1154416. [PMID: 37063827 PMCID: PMC10097954 DOI: 10.3389/fimmu.2023.1154416] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2023] [Accepted: 03/20/2023] [Indexed: 04/18/2023] Open
Abstract
Mast cells (MCs) are immune cells of the myeloid lineage distributed in tissues throughout the body. Phenotypically, they are a heterogeneous group characterized by different protease repertoires stored in secretory granules and differential presence of receptors. To adequately address aspects of MC biology either primary MCs isolated from human or mouse tissue or different human MC lines, like HMC-1.1 and -1.2, or rodent MC lines like L138.8A or RBL-2H3 are frequently used. Nevertheless, cellular systems to study MC functions are very limited. We have generated a murine connective tissue-like MC line, termed PMC-306, derived from primary peritoneal MCs (PMCs), which spontaneously transformed. We analyzed PMC-306 cells regarding MC surface receptor expression, effector functions and respective signaling pathways, and found that the cells reacted very similar to primary wildtype (WT) PMCs. In this regard, stimulation with MAS-related G-protein-coupled receptor member B2 (MRGPRB2) ligands induced respective signaling and effector functions. Furthermore, PMC-306 cells revealed significantly accelerated cell cycle progression, which however was still dependent on interleukine 3 (IL-3) and stem cell factor (SCF). Phenotypically, PMC-306 cells adopted an immature connective tissue-like MCs appearance. The observation of cellular transformation was accompanied by the loss of Cdkn2a and Arf expression, which are both described as critical cell cycle regulators. The loss of Cdkn2a and Arf expression could be mimicked in primary bone marrow-derived mast cells (BMMCs) by sustained SCF supplementation strongly arguing for an involvement of KIT activation in the regulation of Cdkn2a/Arf expression. Hence, this new cell line might be a useful tool to study further aspects of PMC function and to address tumorigenic processes associated with MC leukemia.
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Affiliation(s)
- Sandro Capellmann
- Institute of Biochemistry and Molecular Immunology, Medical Faculty, Rheinisch-Westfälische Technische Hochschule (RWTH) Aachen University, Aachen, Germany
- *Correspondence: Sandro Capellmann, ; Michael Huber,
| | - Roland Sonntag
- Department of Internal Medicine III, University Hospital, Rheinisch-Westfälische Technische Hochschule (RWTH) Aachen University, Aachen, Germany
| | - Herdit Schüler
- Institute of Human Genetics, Medical Faculty, Rheinisch-Westfälische Technische Hochschule (RWTH) Aachen University, Aachen, Germany
| | - Steffen K. Meurer
- Institute of Molecular Pathobiochemistry, Experimental Gene Therapy and Clinical Chemistry (IFMPEGKC), Medical Faculty, Rheinisch-Westfälische Technische Hochschule (RWTH) Aachen University, Aachen, Germany
| | - Lin Gan
- Genomics Facility, Interdisciplinary Center for Clinical Research (IZKF), Medical Faculty, Rheinisch-Westfälische Technische Hochschule (RWTH) Aachen University, Aachen, Germany
| | - Marlies Kauffmann
- Institute of Biochemistry and Molecular Immunology, Medical Faculty, Rheinisch-Westfälische Technische Hochschule (RWTH) Aachen University, Aachen, Germany
| | - Katharina Horn
- Institute of Biochemistry and Molecular Immunology, Medical Faculty, Rheinisch-Westfälische Technische Hochschule (RWTH) Aachen University, Aachen, Germany
| | - Hiltrud Königs-Werner
- Electron Microscopy Facility, Institute of Pathology, Medical Faculty, Rheinisch-Westfälische Technische Hochschule (RWTH) Aachen University, Aachen, Germany
| | - Ralf Weiskirchen
- Institute of Molecular Pathobiochemistry, Experimental Gene Therapy and Clinical Chemistry (IFMPEGKC), Medical Faculty, Rheinisch-Westfälische Technische Hochschule (RWTH) Aachen University, Aachen, Germany
| | - Christian Liedtke
- Department of Internal Medicine III, University Hospital, Rheinisch-Westfälische Technische Hochschule (RWTH) Aachen University, Aachen, Germany
| | - Michael Huber
- Institute of Biochemistry and Molecular Immunology, Medical Faculty, Rheinisch-Westfälische Technische Hochschule (RWTH) Aachen University, Aachen, Germany
- *Correspondence: Sandro Capellmann, ; Michael Huber,
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7
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Michel M, Sereme Y, Mankouri F, Gouitaa M, Gautier C, Mège JL, Cassagne C, Ranque S, Reynaud-Gaubert M, Vitte J. Basophil Activation Test With Aspergillus Molecules: The Case for ABPA. FRONTIERS IN ALLERGY 2022; 3:898731. [PMID: 36238933 PMCID: PMC9552950 DOI: 10.3389/falgy.2022.898731] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2022] [Accepted: 05/23/2022] [Indexed: 11/28/2022] Open
Abstract
Background Allergic bronchopulmonary aspergillosis (ABPA) is an underestimated allergic disease due to Aspergillus fumigatus (AF). The main diagnostic criteria for ABPA rely on the evaluation of immunoglobulin (Ig) E and IgG responses to AF extracts, although these cannot discriminate AF-sensitization from ABPA. Objectives To evaluate the performance of cellular functional assays with extract and molecular AF allergens in ABPA. Methods A prospective cohort of 67 patients (6 ABPA) was investigated with basophil activation test (BAT) with AF extract. Twelve patients were further investigated for BAT responses to molecular AF components: Asp f 1, Asp f 2, Asp f 3, Asp f 4, and Asp f 6. Results BAT with AF extract with an optimized cutoff displayed 100% sensitivity and 77.6% specificity for ABPA diagnosis. Among patients with positive BAT to AF, BAT with Asp f 4 was significantly higher in ABPA patients at 10 ng/mL (mean basophil stimulation index 10.56 in ABPA vs. 1.24 in non-ABPA patients, p = 0.0002). Conclusion BAT with AF is a promising diagnostic biomarker in the context of suspected ABPA, which can be further improved with AF molecular allergens, especially Asp f 4.
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Affiliation(s)
- Moïse Michel
- Laboratoire d'Immunologie, CHU Carémeau Nîmes, Nîmes, France
- Aix-Marseille Université, APHM, IRD, MEPHI, Marseille, France
- *Correspondence: Moïse Michel
| | - Youssouf Sereme
- Aix-Marseille Université, APHM, IRD, MEPHI, Marseille, France
| | - Farid Mankouri
- Assistance Publique—Hôpitaux de Marseille, Marseille, France
| | - Marion Gouitaa
- Assistance Publique—Hôpitaux de Marseille, Marseille, France
| | | | - Jean-Louis Mège
- Aix-Marseille Université, APHM, IRD, MEPHI, Marseille, France
- Assistance Publique—Hôpitaux de Marseille, Marseille, France
| | - Carole Cassagne
- Assistance Publique—Hôpitaux de Marseille, Marseille, France
- Aix-Marseille Université, APHM, IRD, VITROME, Marseille, France
| | - Stéphane Ranque
- Assistance Publique—Hôpitaux de Marseille, Marseille, France
- Aix-Marseille Université, APHM, IRD, VITROME, Marseille, France
| | - Martine Reynaud-Gaubert
- Aix-Marseille Université, APHM, IRD, MEPHI, Marseille, France
- Assistance Publique—Hôpitaux de Marseille, Marseille, France
| | - Joana Vitte
- Aix-Marseille Université, APHM, IRD, MEPHI, Marseille, France
- IDESP, INSERM UA11, Université de Montpellier, Montpellier, France
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8
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Nagata Y, Suzuki R. FcεRI: A Master Regulator of Mast Cell Functions. Cells 2022; 11:cells11040622. [PMID: 35203273 PMCID: PMC8870323 DOI: 10.3390/cells11040622] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2021] [Revised: 01/29/2022] [Accepted: 02/09/2022] [Indexed: 02/04/2023] Open
Abstract
Mast cells (MCs) perform multiple functions thought to underlie different manifestations of allergies. Various aspects of antigens (Ags) and their interactions with immunoglobulin E (IgE) cause diverse responses in MCs. FcεRI, a high-affinity IgE receptor, deciphers the Ag–IgE interaction and drives allergic responses. FcεRI clustering is essential for signal transduction and, therefore, determines the quality of MC responses. Ag properties precisely regulate FcεRI dynamics, which consequently initiates differential outcomes by switching the intracellular-signaling pathway, suggesting that Ag properties can control MC responses, both qualitatively and quantitatively. Thus, the therapeutic benefits of FcεRI-targeting strategies have long been examined. Disrupting IgE–FcεRI interactions is a potential therapeutic strategy because the binding affinity between IgE and FcεRI is extremely high. Specifically, FcεRI desensitization, due to internalization, is also a potential therapeutic target that is involved in the mechanisms of allergen-specific immunotherapy. Several recent findings have suggested that silent internalization is strongly associated with FcεRI dynamics. A comprehensive understanding of the role of FcεRI may lead to the development of novel therapies for allergies. Here, we review the qualitatively diverse responses of MCs that impact the attenuation/development of allergies with a focus on the role of FcεRI toward Ag exposure.
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9
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Tontini C, Bulfone-Paus S. Novel Approaches in the Inhibition of IgE-Induced Mast Cell Reactivity in Food Allergy. Front Immunol 2021; 12:613461. [PMID: 34456900 PMCID: PMC8387944 DOI: 10.3389/fimmu.2021.613461] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2020] [Accepted: 06/23/2021] [Indexed: 01/21/2023] Open
Abstract
Allergy is an IgE-dependent type-I hypersensitivity reaction that can lead to life-threatening systemic symptoms such as anaphylaxis. In the pathogenesis of the allergic response, the common upstream event is the binding of allergens to specific IgE, inducing cross-linking of the high-affinity FcεRI on mast cells, triggering cellular degranulation and the release of histamine, proteases, lipids mediators, cytokines and chemokines with inflammatory activity. A number of novel therapeutic options to curb mast cell activation are in the pipeline for the treatment of severe allergies. In addition to anti-IgE therapy and allergen-specific immunotherapy, monoclonal antibodies targeted against several key Th2/alarmin cytokines (i.e. IL-4Rα, IL-33, TSLP), active modification of allergen-specific IgE (i.e. inhibitory compounds, monoclonal antibodies, de-sialylation), engagement of inhibitory receptors on mast cells and allergen-specific adjuvant vaccines, are new promising options to inhibit the uncontrolled release of mast cell mediators upon allergen exposure. In this review, we critically discuss the novel approaches targeting mast cells limiting allergic responses and the immunological mechanisms involved, with special interest on food allergy treatment.
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Affiliation(s)
- Chiara Tontini
- Lydia Becker Institute for Immunology and Inflammation, Faculty of Biology, Medicine and Health, University of Manchester, Manchester, United Kingdom
| | - Silvia Bulfone-Paus
- Lydia Becker Institute for Immunology and Inflammation, Faculty of Biology, Medicine and Health, University of Manchester, Manchester, United Kingdom
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10
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Khan MA, Khan ZA, Charles M, Pratap P, Naeem A, Siddiqui Z, Naqvi N, Srivastava S. Cytokine Storm and Mucus Hypersecretion in COVID-19: Review of Mechanisms. J Inflamm Res 2021; 14:175-189. [PMID: 33519225 PMCID: PMC7838037 DOI: 10.2147/jir.s271292] [Citation(s) in RCA: 35] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2020] [Accepted: 12/08/2020] [Indexed: 12/18/2022] Open
Abstract
Mucus is an integral part of the respiratory physiology. It protects the respiratory tract by acting as a physical barrier against inhaled particles and microbes. Excessive inflammation in conditions such as COVID-19 can result in over-production of mucus which obstructs the airway. Build-up of mucus can also contribute to recurrent airway infection, causing further obstruction. This article summarizes the current understanding and knowledge of respiratory mucus production and proposes the role of cytokine storm in inducing sudden mucus hypersecretion in COVID-19. Based on these cascades, the active constituents that inhibit or activate several potential targets are outlined for further research. These may be explored for the discovery and design of drugs to combat cytokine storm and its ensuing complications.
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Affiliation(s)
- Mohsin Ali Khan
- Reseach & Development Department, Era's Lucknow Medical College & Hospital, Lucknow, Uttar Pradesh, India
| | - Zaw Ali Khan
- Reseach & Development Department, Era's Lucknow Medical College & Hospital, Lucknow, Uttar Pradesh, India
| | - Mark Charles
- Metabolic Research Unit, Era's Lucknow Medical College & Hospital, Lucknow, Uttar Pradesh, India
| | - Pushpendra Pratap
- Metabolic Research Unit, Era's Lucknow Medical College & Hospital, Lucknow, Uttar Pradesh, India
| | - Abdul Naeem
- Metabolic Research Unit, Era's Lucknow Medical College & Hospital, Lucknow, Uttar Pradesh, India
| | - Zainab Siddiqui
- Department of Pathology, Era's Lucknow Medical College & Hospital, Lucknow, Uttar Pradesh, India
| | - Nigar Naqvi
- Department of Nutrition, Era's Lucknow Medical College & Hospital, Lucknow, Uttar Pradesh, India
| | - Shikha Srivastava
- Department of Nutrition, Era's Lucknow Medical College & Hospital, Lucknow, Uttar Pradesh, India
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11
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Pechsrichuang P, Namwongnao S, Jacquet A. Bioengineering of Virus-like Particles for the Prevention or Treatment of Allergic Diseases. ALLERGY, ASTHMA & IMMUNOLOGY RESEARCH 2021; 13:23-41. [PMID: 33191675 PMCID: PMC7680827 DOI: 10.4168/aair.2021.13.1.23] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/11/2020] [Revised: 06/30/2020] [Accepted: 07/01/2020] [Indexed: 11/26/2022]
Abstract
Recent findings on the mechanism of allergen-specific immunotherapy (AIT) have revisited the role of immunoglobulin G (IgG) as the development of specific blocking IgG antibodies appeared critical for the successful suppression of T-helper 2 (Th2)-biased allergic responses. Consequently, any form of molecular AIT-promoting potent allergen-specific neutralizing antibodies would be preferred to conventional administration of allergen extracts. The potent immunogenicity of virus-like particles (VLPs) could be harnessed for that purpose. The particle size (20–200 nm) optimizes uptake by antigen-presenting cells as well as lymphatic trafficking. Moreover, the display of antigens in repetitive arrays promotes potent B cell activation for the development of sustained antibody responses. The presentation of self-antigens on the particle surface was even capable to break B cell tolerance. In this review, we describe the immunomodulatory properties of the 3 VLP-based strategies designed so far for the treatment of allergic disease: VLP packaged with CpG motifs as well as chimeric particles displaying pro-Th2/Th2 cytokines or allergens (full-length or B cell epitopes).
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Affiliation(s)
- Phornsiri Pechsrichuang
- Center of Excellence in Vaccine Research and Development, Faculty of Medicine, Chulalongkorn University, Bangkok, Thailand
| | - Supannika Namwongnao
- Center of Excellence in Vaccine Research and Development, Faculty of Medicine, Chulalongkorn University, Bangkok, Thailand
| | - Alain Jacquet
- Center of Excellence in Vaccine Research and Development, Faculty of Medicine, Chulalongkorn University, Bangkok, Thailand.
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12
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Soongrung T, Mongkorntanyatip K, Peepim T, Jitthamstaporn S, Pitakpolrat P, Kaewamatawong T, Janitzek CM, Thrane S, Sander AF, Jacquet A. Virus-like particles displaying major house dust mite allergen Der p 2 for prophylactic allergen immunotherapy. Allergy 2020; 75:1232-1236. [PMID: 31701528 DOI: 10.1111/all.14096] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Affiliation(s)
- Tewarit Soongrung
- Center of Excellence in Vaccine Research and Development Faculty of Medicine Chulalongkorn University Bangkok Thailand
| | - Karntichar Mongkorntanyatip
- Center of Excellence in Vaccine Research and Development Faculty of Medicine Chulalongkorn University Bangkok Thailand
| | - Termsri Peepim
- Center of Excellence in Vaccine Research and Development Faculty of Medicine Chulalongkorn University Bangkok Thailand
| | - Sirikarn Jitthamstaporn
- Center of Excellence in Vaccine Research and Development Faculty of Medicine Chulalongkorn University Bangkok Thailand
| | - Patrawadee Pitakpolrat
- Center of Excellence in Vaccine Research and Development Faculty of Medicine Chulalongkorn University Bangkok Thailand
| | - Theerayuth Kaewamatawong
- Veterinary Pathology Unit Department of Pathology Faculty of Veterinary Science Chulalongkorn University Bangkok Thailand
| | - Christoph M. Janitzek
- Centre for Medical Parasitology Department of Immunology and Microbiology University of Copenhagen Copenhagen Denmark
| | - Susan Thrane
- Centre for Medical Parasitology Department of Immunology and Microbiology University of Copenhagen Copenhagen Denmark
| | - Adam F. Sander
- Centre for Medical Parasitology Department of Immunology and Microbiology University of Copenhagen Copenhagen Denmark
| | - Alain Jacquet
- Center of Excellence in Vaccine Research and Development Faculty of Medicine Chulalongkorn University Bangkok Thailand
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13
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Mohamed OE, Baretto RL, Walker I, Melchior C, Heslegrave J, Mckenzie R, Hullur C, Ekbote A, Krishna MT. Empty mast cell syndrome: fallacy or fact? J Clin Pathol 2019; 73:250-256. [PMID: 31831575 DOI: 10.1136/jclinpath-2019-206157] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2019] [Revised: 11/06/2019] [Accepted: 11/25/2019] [Indexed: 12/22/2022]
Abstract
Post-anaphylaxis mast cell anergy (PAMA), commonly referred to as 'empty mast cell (MC) syndrome', is a state of temporary loss of cutaneous MC reactivity in the immediate aftermath of anaphylaxis. Data relating to this condition are sparse and the incidence rate is currently unknown. PAMA has been described only in a few published case reports in the context of hymenoptera venom allergy and perioperative anaphylaxis. Best practice guidelines regarding optimal timing for performing skin tests postanaphylaxis are largely based on expert opinion, and allergy work-up has been recommended after 4-6 weeks postanaphylaxis to avoid false-negative results.This article provides a review of clinical literature surrounding PAMA, critically evaluates intracellular events in MCs from in vitro data and hypothesises regarding plausible immune mechanisms. There are no published data to directly explain molecular mechanisms underlying this phenomenon. Although not evidence based, PAMA has been attributed to depletion of MC granules following anaphylaxis. It is also plausible that exposure to high allergen concentrations in anaphylaxis can induce a temporary shift in MCs towards dominance of inhibitory signalling pathways, thus contributing to a state of transient hyporesponsiveness observed in some patients. Other potential contributory factors for reduced MC reactivity include downregulation of FcεRI expression, cross-linking of FcεRI to the inhibitory, low-affinity IgG receptors and administration of pharmacotherapeutic agents for anaphylaxis treatment. It is likely that this interesting phenomenon can be explained by a combination of these proposed mechanisms in addition to other genetic/host factors that have not yet been identified.
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Affiliation(s)
- Omar E Mohamed
- Allergy and Immunology, University Hospitals Birmingham NHS Foundation Trust, Birmingham, UK
| | - Richard L Baretto
- Allergy and Immunology, University Hospitals Birmingham NHS Foundation Trust, Birmingham, UK
| | - Ian Walker
- Anaesthesia, University Hospitals Birmingham NHS Foundation Trust, Birmingham, UK
| | - Cathryn Melchior
- Allergy and Immunology, University Hospitals Birmingham NHS Foundation Trust, Birmingham, UK
| | - Jane Heslegrave
- Allergy and Immunology, University Hospitals Birmingham NHS Foundation Trust, Birmingham, UK
| | - Ruth Mckenzie
- Anaesthesia, University Hospitals Birmingham NHS Foundation Trust, Birmingham, UK
| | - Chidanand Hullur
- Anaesthesia, University Hospitals Birmingham NHS Foundation Trust, Birmingham, UK
| | - Anjali Ekbote
- Allergy and Immunology, University Hospitals Birmingham NHS Foundation Trust, Birmingham, UK
| | - Mamidipudi Thirumala Krishna
- Allergy and Immunology, University Hospitals Birmingham NHS Foundation Trust, Birmingham, UK.,Institute of Immunology and Immunotherapy, University of Birmingham, Birmingham, UK
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14
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Designer covalent heterobivalent inhibitors prevent IgE-dependent responses to peanut allergen. Proc Natl Acad Sci U S A 2019; 116:8966-8974. [PMID: 30962381 PMCID: PMC6500160 DOI: 10.1073/pnas.1820417116] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023] Open
Abstract
Allergies are a result of allergen proteins cross-linking allergen-specific IgE (sIgE) on the surface of mast cells and basophils. The diversity and complexity of allergen epitopes, and high-affinity of the sIgE-allergen interaction have impaired the development of allergen-specific inhibitors of allergic responses. This study presents a design of food allergen-specific sIgE inhibitors named covalent heterobivalent inhibitors (cHBIs) that selectively form covalent bonds to only sIgEs, thereby permanently inhibiting them. Using screening reagents termed nanoallergens, we identified two immunodominant epitopes in peanuts that were common in a population of 16 allergic patients. Two cHBIs designed to inhibit only these two epitopes completely abrogated the allergic response in 14 of the 16 patients in an in vitro assay and inhibited basophil activation in an allergic patient ex vivo analysis. The efficacy of the cHBI design has valuable clinical implications for many allergen-specific responses and more broadly for any antibody-based disease.
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15
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Rasmussen P, Spillner E, Hoffmann HJ. Inhibiting phosphatase SHIP-1 enhances suboptimal IgE-mediated activation of human blood basophils but inhibits IgE-mediated activation of cultured human mast cells. Immunol Lett 2019; 210:40-46. [PMID: 31004680 DOI: 10.1016/j.imlet.2019.04.003] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2018] [Revised: 04/10/2019] [Accepted: 04/16/2019] [Indexed: 11/20/2022]
Abstract
IgE-mediated activation of basophil granulocytes and mast cells follows a bell-shaped dose-response curve. The decreased activation at supraoptimal allergen stimulation is thought to be associated with SH2-containing inositol-5'-phosphatase 1 (SHIP-1). SHIP-1 phosphorylation is inversely related to IgE-mediated releasability of basophils. This study sought to clarify the regulatory role of SHIP-1 in degranulation of basophil granulocytes and mast cells by selective inhibition of the phosphatase function of SHIP-1with 3-α-aminocholestane (3-α-AC). Six grass pollen allergic patients, six non-responder patients and six cultured human primary mast cell lines were included. The effect of 3-α-AC (1-60 μM, 30 min, 37 °C) was analyzed at individual suboptimal, optimal and supra-optimal allergen concentrations. The activity, upregulation of CD63, measured at different conditions was compared to evaluate the maximal effect of selective SHIP-1 inhibition. Basophils of five non-responder patients were treated with 3-α-AC (10 μM, 30 min, 37 °C). At high concentrations (>60 μM) of 3-α-AC, cells appeared to enter apoptosis. The median reactivity increased from 27.1% to 44.9% CD63+ basophils at 10 μM of 3-α-AC and suboptimal allergen stimulation (p = 0.0153). There was no effect on blood basophils of 3-α-AC at optimal or supra-optimal allergen concentrations. In contrast, treatment with more than 6 μM 3-α-AC significantly inhibited mast cell reactivity. 10 μM 3-α-AC reduced median reactivity from 32.85% to 16.5% CD63+ mast cells (p = 0.0465). Treatment with 3-α-AC did not increase response of basophils of non-responder patients. Modulating blood basophils with 3-α-AC enhanced reactivity only at suboptimal allergen concentration, and basophils from non-responders did not regain responsiveness to IgE stimulation. 3-α-AC inhibited the IgE response of mast cells in a dose dependent manner.
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Affiliation(s)
- Pernille Rasmussen
- Department of Respiratory Diseases and Allergy, Aarhus University Hospital, Denmark
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16
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Huber M, Cato ACB, Ainooson GK, Freichel M, Tsvilovskyy V, Jessberger R, Riedlinger E, Sommerhoff CP, Bischoff SC. Regulation of the pleiotropic effects of tissue-resident mast cells. J Allergy Clin Immunol 2019; 144:S31-S45. [PMID: 30772496 DOI: 10.1016/j.jaci.2019.02.004] [Citation(s) in RCA: 38] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2018] [Revised: 01/29/2019] [Accepted: 02/01/2019] [Indexed: 12/18/2022]
Abstract
Mast cells (MCs), which are best known for their detrimental role in patients with allergic diseases, act in a diverse array of physiologic and pathologic functions made possible by the plurality of MC types. Their various developmental avenues and distinct sensitivity to (micro-) environmental conditions convey extensive heterogeneity, resulting in diverse functions. We briefly summarize this heterogeneity, elaborate on molecular determinants that allow MCs to communicate with their environment to fulfill their tasks, discuss the protease repertoire stored in secretory lysosomes, and consider different aspects of MC signaling. Furthermore, we describe key MC governance mechanisms (ie, the high-affinity receptor for IgE [FcεRI]), the stem cell factor receptor KIT, the IL-4 system, and both Ca2+- and phosphatase-dependent mechanisms. Finally, we focus on distinct physiologic functions, such as chemotaxis, phagocytosis, host defense, and the regulation of MC functions at the mucosal barriers of the lung, gastrointestinal tract, and skin. A deeper knowledge of the pleiotropic functions of MC mediators, as well as the molecular processes of MC regulation and communication, should enable us to promote beneficial MC traits in physiology and suppress detrimental MC functions in patients with disease.
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Affiliation(s)
- Michael Huber
- Institute of Biochemistry and Molecular Immunology, Medical Faculty, RWTH Aachen University, Aachen, Germany.
| | - Andrew C B Cato
- Karlsruhe Institute of Technology, Institute of Toxicology and Genetics, Eggenstein-Leopoldshafen, Germany
| | - George K Ainooson
- Karlsruhe Institute of Technology, Institute of Toxicology and Genetics, Eggenstein-Leopoldshafen, Germany
| | - Marc Freichel
- Institute of Pharmacology, Heidelberg University, Medical Faculty, Heidelberg, Germany
| | - Volodymyr Tsvilovskyy
- Institute of Pharmacology, Heidelberg University, Medical Faculty, Heidelberg, Germany
| | - Rolf Jessberger
- Institute for Physiological Chemistry, Medical Faculty Carl Gustav Carus, Technische Universität Dresden, Dresden, Germany
| | - Eva Riedlinger
- Institute of Laboratory Medicine, University Hospital, LMU Munich, Munich, Germany
| | | | - Stephan C Bischoff
- Institute of Nutritional Medicine, University of Hohenheim, Stuttgart, Germany.
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17
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Stimulus strength determines the BTK-dependence of the SHIP1-deficient phenotype in IgE/antigen-triggered mast cells. Sci Rep 2018; 8:15467. [PMID: 30341350 PMCID: PMC6195619 DOI: 10.1038/s41598-018-33769-1] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2017] [Accepted: 10/05/2018] [Indexed: 01/27/2023] Open
Abstract
Antigen (Ag)-mediated crosslinking of IgE-loaded high-affinity receptors for IgE (FcεRI) on mast cells (MCs) triggers activation of proinflammatory effector functions relevant for IgE-associated allergic disorders. The cytosolic tyrosine kinase BTK and the SH2-containing inositol-5'-phosphatase SHIP1 are central positive and negative regulators of Ag-triggered MC activation, respectively, contrarily controlling Ca2+ mobilisation, degranulation, and cytokine production. Using genetic and pharmacological techniques, we examined whether BTK activation in Ship1-/- MCs is mandatory for the manifestation of the well-known hyperactive phenotype of Ship1-/- MCs. We demonstrate the prominence of BTK for the Ship1-/- phenotype in a manner strictly dependent on the strength of the initial Ag stimulus; particular importance for BTK was identified in Ship1-/- bone marrow-derived MCs in response to stimulation with suboptimal Ag concentrations. With respect to MAPK activation, BTK showed particular importance at suboptimal Ag concentrations, allowing for an analogous-to-digital switch resulting in full activation of ERK1/2 already at low Ag concentrations. Our data allow for a more precise definition of the role of BTK in FcεRI-mediated signal transduction and effector function in MCs. Moreover, they suggest that reduced activation or curtate expression of SHIP1 can be compensated by pharmacological inhibition of BTK and vice versa.
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18
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Gast M, Preisinger C, Nimmerjahn F, Huber M. IgG-Independent Co-aggregation of FcεRI and FcγRIIB Results in LYN- and SHIP1-Dependent Tyrosine Phosphorylation of FcγRIIB in Murine Bone Marrow-Derived Mast Cells. Front Immunol 2018; 9:1937. [PMID: 30210494 PMCID: PMC6119721 DOI: 10.3389/fimmu.2018.01937] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2018] [Accepted: 08/06/2018] [Indexed: 12/30/2022] Open
Abstract
Activation of the high-affinity receptor for IgE (FcεRI) follows a bell-shaped dose-response curve. Upon supra-optimal stimulation, mast cell effector responses are down-regulated by inhibitory molecules like the SH2-containing inositol-5'-phosphatase SHIP1 and the SRC-family-kinase LYN. To identify further molecules involved in a negative regulatory signalosome, we screened for proteins showing the same pattern of tyrosine phosphorylation as SHIP1, which is tyrosine-phosphorylated strongest upon supra-optimal antigen (Ag) stimulation. The low-affinity IgG receptor, FcγRIIB, was found to be most strongly phosphorylated under supra-optimal conditions. This phosphorylation is the consequence of passive, Ag/IgE-dependent and progressive co-localization of FcεRI and FcγRIIB, which is not dependent on IgG. Upon supra-optimal FcεRI cross-linking, FcγRIIB phosphorylation is executed by LYN and protected from dephosphorylation by SHIP1. Analysis of FcγRIIB-deficient bone marrow-derived mast cells revealed an ambiguous phenotype upon FcεRI cross-linking. Absence of FcγRIIB significantly diminished the level of SHIP1 phosphorylation and resulted in augmented Ca2+ mobilization. Though, degranulation and IL-6 production were only weakly altered. Altogether our data establish the LYN/FcγRIIB/SHIP1 signalosome in the context of FcεRI activation, particularly at supra-optimal Ag concentrations. The fact that SHIP1 tyrosine phosphorylation/activation not only depends on FcγRIIB, highlights the necessity for its tight backup control.
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Affiliation(s)
- Mathias Gast
- Medical Faculty, Institute of Biochemistry and Molecular Immunology, RWTH Aachen University, Aachen, Germany
| | | | - Falk Nimmerjahn
- Institute of Genetics at the Department of Biology, Friedrich-Alexander-University Erlangen-Nürnberg, Erlangen, Germany
| | - Michael Huber
- Medical Faculty, Institute of Biochemistry and Molecular Immunology, RWTH Aachen University, Aachen, Germany
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19
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Kim MJ, Kim YY, Choi YA, Baek MC, Lee B, Park PH, Shin TY, Kwon TK, Khang D, Kim SH. Elaeocarpusin Inhibits Mast Cell-Mediated Allergic Inflammation. Front Pharmacol 2018; 9:591. [PMID: 29930511 PMCID: PMC5999758 DOI: 10.3389/fphar.2018.00591] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2018] [Accepted: 05/17/2018] [Indexed: 12/16/2022] Open
Abstract
Mast cells are major effector cells for allergic responses that act by releasing inflammatory mediators, such as histamine and pro-inflammatory cytokines. Accordingly, different strategies have been pursued to develop anti-allergic and anti-inflammatory candidates by regulating the function of mast cells. The purpose of this study was to determine the effectiveness of elaeocarpusin (EL) on mast cell-mediated allergic inflammation. We isolated EL from Elaeocarpus sylvestris L. (Elaeocarpaceae), which is known to possess anti-inflammatory properties. For this study, various sources of mast cells and mouse anaphylaxis models were used. EL suppressed the induction of markers for mast cell degranulation, such as histamine and β-hexosaminidase, by reducing intracellular calcium levels. Expression of pro-inflammatory cytokines, such as tumor necrosis factor-α and IL-4, was significantly decreased in activated mast cells by EL. This inhibitory effect was related to inhibition of the phosphorylation of Fyn, Lyn, Syk, and Akt, and the nuclear translocation of nuclear factor-κB. To confirm the effect of EL in vivo, immunoglobulin E-mediated passive cutaneous anaphylaxis (PCA) and ovalbumin-induced active systemic anaphylaxis (ASA) models were induced. EL reduced the PCA reaction in a dose dependent manner. In addition, EL attenuated ASA reactions such as hypothemia, histamine release, and IgE production. Our results suggest that EL is a potential therapeutic candidate for allergic inflammatory diseases that acts via the inhibition of mast cell degranulation and expression of proinflammatory cytokines.
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Affiliation(s)
- Min-Jong Kim
- CMRI, Department of Pharmacology, School of Medicine, Kyungpook National University, Daegu, South Korea
| | - Yeon-Yong Kim
- CMRI, Department of Pharmacology, School of Medicine, Kyungpook National University, Daegu, South Korea
| | - Young-Ae Choi
- CMRI, Department of Pharmacology, School of Medicine, Kyungpook National University, Daegu, South Korea
| | - Moon-Chang Baek
- Department of Molecular Medicine, School of Medicine, Kyungpook National University, Daegu, South Korea
| | - Byungheon Lee
- Department of Biochemistry and Cell Biology, School of Medicine, Kyungpook National University, Daegu, South Korea
| | - Pil-Hoon Park
- College of Pharmacy, Yeungnam University, Gyeongsan, South Korea
| | - Tae-Yong Shin
- College of Pharmacy, Woosuk University, Jeonju, South Korea
| | - Taeg Kyu Kwon
- Department of Immunology, School of Medicine, Keimyung University, Daegu, South Korea
| | - Dongwoo Khang
- Department of Physiology, School of Medicine, Gachon University, Seongnam, South Korea
| | - Sang-Hyun Kim
- CMRI, Department of Pharmacology, School of Medicine, Kyungpook National University, Daegu, South Korea
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20
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Engeroff P, Caviezel F, Storni F, Thoms F, Vogel M, Bachmann MF. Allergens displayed on virus-like particles are highly immunogenic but fail to activate human mast cells. Allergy 2018; 73:341-349. [PMID: 28787769 DOI: 10.1111/all.13268] [Citation(s) in RCA: 43] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/03/2017] [Indexed: 01/14/2023]
Abstract
BACKGROUND The goal of allergen-specific immunotherapy is the induction of protective immune responses in the absence of anaphylactic reactions. We have previously shown that Fel d 1, the major cat allergen, displayed in a repetitive fashion on virus-like particles (VLPs) may fulfill these criteria. Specifically, Fel d 1 on VLPs induced strongly increased protective IgG responses compared to free allergen in mice while anaphylactic reactions were essentially abolished. Here we extend these findings to human mast cells and offer a mechanistic explanation for the reduced anaphylactic activity. METHODS We differentiated human mast cells in vitro from blood-derived stem cell progenitors and sensitized the cells with a monoclonal Fel d 1-specific IgE. We compared the capability of Fel d 1 to induce mast cell activation in its free form versus displayed on VLPs and we performed allergen binding studies by surface plasmon resonance as well as flow cytometry. RESULTS We show that free Fel d 1 induces degranulation of IgE-sensitized mast cells whereas Fel d 1 displayed on VLPs fails to induce mast cell activation. We demonstrate that this inability to activate mast cells is based on a biophysical as well as a biochemical mechanism. Firstly, Fel d 1 on VLPs showed a strongly impaired ability to bind to surface-bound IgE. Secondly, despite residual binding, repetitively displayed allergen on VLPs failed to cause mast cell activation. CONCLUSION These findings indicate that repetitively displaying allergens on VLPs increases their immunogenicity while reducing their potential to cause anaphylactic reactions by essentially eliminating IgE-mediated activation of mast cells.
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Affiliation(s)
- P. Engeroff
- Department of Rheumatology; Immunology and Allergology; University Hospital; University of Bern; Bern Switzerland
| | - F. Caviezel
- Department of Rheumatology; Immunology and Allergology; University Hospital; University of Bern; Bern Switzerland
| | - F. Storni
- Department of Rheumatology; Immunology and Allergology; University Hospital; University of Bern; Bern Switzerland
| | - F. Thoms
- Department of Dermatology; Zurich University Hospital; Schlieren/Zurich Switzerland
| | - M. Vogel
- Department of Rheumatology; Immunology and Allergology; University Hospital; University of Bern; Bern Switzerland
| | - M. F. Bachmann
- Department of Rheumatology; Immunology and Allergology; University Hospital; University of Bern; Bern Switzerland
- Nuffield Department of Medicine; The Jenner Institute; University of Oxford; Oxford UK
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21
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Nunomura S, Ra C, Terui T, Okayama Y. Disulfide-linked dimerization of the FcRγ chain is required for positive and negative regulation of mast cell activation via FcεRI. Allergol Int 2017. [PMID: 28629706 DOI: 10.1016/j.alit.2017.04.010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Affiliation(s)
- Satoshi Nunomura
- Allergy and Immunology Project Team, Nihon University School of Medicine, Tokyo, Japan; Department of Dermatology, Nihon University School of Medicine, Tokyo, Japan; Division of Medical Biochemistry, Department of Biomolecular Sciences, Saga Medical School, Saga, Japan.
| | - Chisei Ra
- Allergy and Immunology Project Team, Nihon University School of Medicine, Tokyo, Japan; Department of Microbiology, Nihon University School of Medicine, Tokyo, Japan; Department of Clinical Laboratory, Asahi General Hospital, Chiba, Japan
| | - Tadashi Terui
- Department of Dermatology, Nihon University School of Medicine, Tokyo, Japan
| | - Yoshimichi Okayama
- Allergy and Immunology Project Team, Nihon University School of Medicine, Tokyo, Japan; Division of Medical Education Planning and Development, Nihon University School of Medicine, Tokyo, Japan
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22
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Deak PE, Vrabel MR, Kiziltepe T, Bilgicer B. Determination of Crucial Immunogenic Epitopes in Major Peanut Allergy Protein, Ara h2, via Novel Nanoallergen Platform. Sci Rep 2017; 7:3981. [PMID: 28638052 PMCID: PMC5479826 DOI: 10.1038/s41598-017-04268-6] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2017] [Accepted: 05/10/2017] [Indexed: 12/16/2022] Open
Abstract
Current methods for detection and diagnosis of allergies do not provide epitope specific immunogenic information and hence lack critical information that could aid in the prediction of clinical responses. To address this issue, we developed a nanoparticle based platform, called nanoallergens that enable multivalent display of potential allergy epitopes for determining the immunogenicity of each IgE binding epitope. By synthesizing nanoallergens that present various epitopes from the major peanut allergen, Ara h2, we directly determined the immunogenicity of each epitope, alone and in combination with other epitopes, using patient sera. This information provided insights on which epitopes are most critical for physiological responses to Ara h2 and revealed the importance of both high and low affinity epitopes for allergic responses. We anticipate the nanoallergen platform to be used to provide information regarding allergic reactions and therefore potentially aid in more accurate diagnosis and design of personalized treatment options.
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Affiliation(s)
- Peter E Deak
- Department of Chemical and Biomolecular Engineering, University of Notre Dame, Notre Dame, IN, 46556, USA
| | - Maura R Vrabel
- Department of Chemical and Biomolecular Engineering, University of Notre Dame, Notre Dame, IN, 46556, USA
| | - Tanyel Kiziltepe
- Department of Chemical and Biomolecular Engineering, University of Notre Dame, Notre Dame, IN, 46556, USA
- Advanced Diagnostics and Therapeutics, University of Notre Dame, Notre Dame, IN, 46556, USA
| | - Basar Bilgicer
- Department of Chemical and Biomolecular Engineering, University of Notre Dame, Notre Dame, IN, 46556, USA.
- Advanced Diagnostics and Therapeutics, University of Notre Dame, Notre Dame, IN, 46556, USA.
- Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, IN, 46556, USA.
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23
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Yin Y, Bai Y, Olivera A, Desai A, Metcalfe DD. An optimized protocol for the generation and functional analysis of human mast cells from CD34 + enriched cell populations. J Immunol Methods 2017. [PMID: 28629733 DOI: 10.1016/j.jim.2017.06.003] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
The culture of mast cells from human tissues such a cord blood, peripheral blood or bone marrow aspirates has advanced our understanding of human mast cells (huMC) degranulation, mediator production and response to pharmacologic agents. However, existing methods for huMC culture tend to be laborious and expensive. Combining technical approaches from several of these protocols, we designed a simplified and more cost effective approach to the culture of mast cells from human cell populations including peripheral blood and cryopreserved cells from lymphocytapheresis. On average, we reduced by 30-50 fold the amount of culture media compared to our previously reported method, while the total MC number generated by this method (2.46±0.63×106 vs. 2.4±0.28×106, respectively, from 1.0×108 lymphocytapheresis or peripheral blood mononuclear blood cells [PBMCs]) was similar to our previous method (2.36±0.70×106), resulting in significant budgetary savings. In addition, we compared the yield of huMCs with or without IL-3 added to early cultures in the presence of stem cell factor (SCF) and interlukin-6 (IL-6) and found that the total MC number generated, while higher with IL-3 in the culture, did not reach statistical significance, suggesting that IL-3, often recommended in the culture of huMCs, is not absolutely required. We then performed a functional analysis by flow cytometry using standard methods and which maximized the data we could obtain from cultured cells. We believe these approaches will allow more laboratories to culture and examine huMC behavior going forward.
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Affiliation(s)
- Yuzhi Yin
- Laboratory of Allergic Diseases, National Institute of Allergy and Infectious Diseases,National Institutes of Health, Bethesda, MD 20892, USA.
| | - Yun Bai
- Laboratory of Allergic Diseases, National Institute of Allergy and Infectious Diseases,National Institutes of Health, Bethesda, MD 20892, USA
| | - Ana Olivera
- Laboratory of Allergic Diseases, National Institute of Allergy and Infectious Diseases,National Institutes of Health, Bethesda, MD 20892, USA
| | - Avanti Desai
- Laboratory of Allergic Diseases, National Institute of Allergy and Infectious Diseases,National Institutes of Health, Bethesda, MD 20892, USA
| | - Dean D Metcalfe
- Laboratory of Allergic Diseases, National Institute of Allergy and Infectious Diseases,National Institutes of Health, Bethesda, MD 20892, USA
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24
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Chelombitko MA, Fedorov AV, Ilyinskaya OP, Zinovkin RA, Chernyak BV. Role of reactive oxygen species in mast cell degranulation. BIOCHEMISTRY (MOSCOW) 2016; 81:1564-1577. [DOI: 10.1134/s000629791612018x] [Citation(s) in RCA: 42] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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25
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Nunes de Miranda SM, Wilhelm T, Huber M, Zorn CN. Differential Lyn-dependence of the SHIP1-deficient mast cell phenotype. Cell Commun Signal 2016; 14:12. [PMID: 27206658 PMCID: PMC4874025 DOI: 10.1186/s12964-016-0135-0] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2015] [Accepted: 05/13/2016] [Indexed: 01/02/2023] Open
Abstract
Background Antigen (Ag)/IgE-mediated mast cell (MC) responses play detrimental roles in allergic diseases. MC activation via the high-affinity receptor for IgE (FcεRI) is controlled by the Src family kinase Lyn. Lyn-deficient (-/-) bone marrow-derived MCs (BMMCs) have been shown by various laboratories to exert stronger activation of the PI3K pathway, degranulation, and production of pro-inflammatory cytokines compared to wild-type (wt) cells. This mimics the phenotype of BMMCs deficient for the SH2-containing inositol-5’-phosphatase 1 (SHIP1). In this line, Lyn has been demonstrated to tyrosine-phosphorylate and activate SHIP1, thereby constituting a negative feedback control of PI3K-mediated signals. However, several groups have also reported on Lyn-/- BMMCs degranulating weaker than wt BMMCs. Results Lyn-/- BMMCs, which show a suppressed degranulation response, were found to exhibit abrogated tyrosine phosphorylation of SHIP1 as well. This indicated that even in the presence of reduced SHIP1 function MC degranulation is dependent on Lyn function. In contrast to the reduced immediate secretory response, pro-inflammatory cytokine production was augmented in Lyn-/- BMMCs. For closer analysis, Lyn/SHIP1-double-deficient (dko) BMMCs were generated. In support of the dominance of Lyn deficiency, dko BMMCs degranulated significantly weaker than SHIP1-/- BMMCs. This coincided with reduced LAT1 and PLC-γ1 phosphorylation as well as Ca2+ mobilization in those cells. Interestingly, activation of the NFκB pathway followed the same pattern as measured by IκBα phosphorylation/degradation as well as induction of NFκB target genes. This suggested that Ag-triggered NFκB activation involves a Ca2+-dependent step. Indeed, IκBα phosphorylation/degradation and NFκB target gene induction were controlled by the Ca2+-dependent phosphatase calcineurin. Conclusions Lyn deficiency is dominant over SHIP1 deficiency in MCs with respect to Ag-triggered degranulation and preceding signaling events. Moreover, the NFκB pathway and respective targets are activated in a Lyn- and Ca2+-dependent manner, reinforcing the importance of Lyn for MC activation. Electronic supplementary material The online version of this article (doi:10.1186/s12964-016-0135-0) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Susana M Nunes de Miranda
- Institute of Biochemistry and Molecular Immunology, University Clinic, RWTH Aachen University, Pauwelsstraße 30, Aachen, 52074, Germany
| | - Thomas Wilhelm
- Institute of Biochemistry and Molecular Immunology, University Clinic, RWTH Aachen University, Pauwelsstraße 30, Aachen, 52074, Germany
| | - Michael Huber
- Institute of Biochemistry and Molecular Immunology, University Clinic, RWTH Aachen University, Pauwelsstraße 30, Aachen, 52074, Germany.
| | - Carolin N Zorn
- Institute of Biochemistry and Molecular Immunology, University Clinic, RWTH Aachen University, Pauwelsstraße 30, Aachen, 52074, Germany
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Deak PE, Vrabel MR, Pizzuti VJ, Kiziltepe T, Bilgicer B. Nanoallergens: A multivalent platform for studying and evaluating potency of allergen epitopes in cellular degranulation. Exp Biol Med (Maywood) 2016; 241:996-1006. [PMID: 27188517 DOI: 10.1177/1535370216644533] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Degranulation caused by type I hypersensitivity (allergies) is a complex biophysical process, and available experimental models for studying relevant immunoglobulin E binding epitopes on allergen proteins lack the ability to adequately evaluate, rank, and associate these epitopes individually and with each other. In this study, we propose a new allergy model system for studying potential allergen epitopes using nanoallergens, liposomes modified to effectively display IgE binding epitopes/haptens. By utilizing the covalently conjugated lipid tails on two hapten molecules (dinitrophenol and dansyl), hapten molecules were successfully incorporated into liposomes with high precision to form nanoallergens. Nanoallergens, with precisely controlled high-particle valency, can trigger degranulation with much greater sensitivity than commonly used bovine serum albumin conjugates. In rat basophil leukemia cell experiments, nanoallergens with only 2% hapten loading were able to trigger degranulation in vitro at concentrations as low as 10 pM. Additionally, unlike bovine serum albumin-hapten conjugates, nanoallergens allow exact control over particle size and valency. By varying the nanoallergen parameters such as size, valency, monovalent affinity of hapten, and specific IgE ratios, we exposed the importance of these variables on degranulation intensity while demonstrating nanoallergens' potential for evaluating both high- and low-affinity epitopes. The data presented in this article establish nanoallergen platform as a reliable and versatile allergy model to study and evaluate allergen epitopes in mast cell degranulation.
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Affiliation(s)
- Peter E Deak
- Department of Chemical and Biomolecular Engineering, University of Notre Dame, IN 46556, USA
| | - Maura R Vrabel
- Department of Chemical and Biomolecular Engineering, University of Notre Dame, IN 46556, USA
| | - Vincenzo J Pizzuti
- Department of Chemical and Biomolecular Engineering, University of Notre Dame, IN 46556, USA
| | - Tanyel Kiziltepe
- Department of Chemical and Biomolecular Engineering, University of Notre Dame, IN 46556, USA Advanced Diagnostics and Therapeutics, University of Notre Dame, IN 46556, USA
| | - Basar Bilgicer
- Department of Chemical and Biomolecular Engineering, University of Notre Dame, IN 46556, USA Advanced Diagnostics and Therapeutics, University of Notre Dame, IN 46556, USA Department of Chemistry and Biochemistry, University of Notre Dame, IN 46556, USA
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Tsai M, Starkl P, Marichal T, Galli SJ, Nilsson G, Daëron M, Levi-Schaffer F, Landolina N, Blank U, Marone G, Varricchi G, Prevete N, Melillo RM, Roediger B, Weninger W, Maurer M. FRT - FONDATION RENE TOURAINE. Exp Dermatol 2015. [DOI: 10.1111/exd.12817] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Mindy Tsai
- Department of Pathology; Stanford University School of Medicine; Stanford CA 94305 USA
| | - Philipp Starkl
- Department of Pathology; Stanford University School of Medicine; Stanford CA 94305 USA
| | - Thomas Marichal
- GIGA-Research and Faculty of Veterinary Medicine; University of Liege; 4000 Liege Belgium
| | - Stephen J. Galli
- Department of Pathology; Stanford University School of Medicine; Stanford CA 94305 USA
- Department of Microbiology & Immunology; Stanford University School of Medicine; Stanford CA 94305 USA
| | - Gunnar Nilsson
- Clinical Immunology and Allergy; Department of Medicine; Karolinska Institutet and University Hospital; 17176 Stockholm Sweden
| | - Marc Daëron
- Institut Pasteur; Paris France
- Centre d'Immunologie de Marseille-Luminy; Marseille France
| | - Francesca Levi-Schaffer
- The Institute for Drug Research; School of Pharmacy; The Hebrew University of Jerusalem; Jerusalem Israel
| | - Nadine Landolina
- The Institute for Drug Research; School of Pharmacy; The Hebrew University of Jerusalem; Jerusalem Israel
| | - Ulrich Blank
- Inserm UMRS-1149; 75018 Paris France
- CNRS ERL 8252; Université Paris Diderot, Sorbonne Paris Cite; 75018 Paris France
- Laboratoire d'excellence INFLAMEX; Université Paris Diderot, Sorbonne Paris Cite; 75018 Paris France
| | - Gianni Marone
- Department of Translational Medical Sciences; University of Naples; Naples Italy
- Center for Basic and Clinical Immunology Research (CISI); University of Naples; Naples Italy
- CNR Institute of Experimental Endocrinology and Oncology ‘G. Salvatore’; Naples Italy
| | - Gilda Varricchi
- Department of Translational Medical Sciences; University of Naples; Naples Italy
| | - Nella Prevete
- Department of Translational Medical Sciences; University of Naples; Naples Italy
| | - Rosa Marina Melillo
- CNR Institute of Experimental Endocrinology and Oncology ‘G. Salvatore’; Naples Italy
- Department of Molecular Medicine and Medical Biotechnology; University of Naples Federico II; Naples Italy
| | - Ben Roediger
- Centenary Institute; Newton NSW Australia
- Discipline of Dermatology; University of Sydney; Camperdown NSW Australia
| | - Wolfgang Weninger
- Centenary Institute; Newton NSW Australia
- Discipline of Dermatology; University of Sydney; Camperdown NSW Australia
- Department of Dermatology; Royal Prince Alfred Hospital; Camperdown NSW Australia
| | - Marcus Maurer
- Department of Dermatology and Allergy; Allergie-Centrum-Charité/ECARF, Charité - Universitätsmedizin; 10117 Berlin Germany
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28
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Vitte J. Human mast cell tryptase in biology and medicine. Mol Immunol 2015; 63:18-24. [DOI: 10.1016/j.molimm.2014.04.001] [Citation(s) in RCA: 89] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2013] [Revised: 04/01/2014] [Accepted: 04/02/2014] [Indexed: 12/25/2022]
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29
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Huber M, Gibbs BF. SHIP1 and the negative control of mast cell/basophil activation by supra-optimal antigen concentrations. Mol Immunol 2015; 63:32-7. [DOI: 10.1016/j.molimm.2014.02.017] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2013] [Revised: 02/19/2014] [Accepted: 02/25/2014] [Indexed: 10/25/2022]
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Handlogten MW, Deak PE, Bilgicer B. Two-allergen model reveals complex relationship between IgE crosslinking and degranulation. ACTA ACUST UNITED AC 2014; 21:1445-51. [PMID: 25308278 DOI: 10.1016/j.chembiol.2014.08.019] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2013] [Revised: 08/16/2014] [Accepted: 08/20/2014] [Indexed: 11/16/2022]
Abstract
Allergy is an immune response to complex mixtures of multiple allergens, yet current models use a single synthetic allergen. Multiple allergens were modeled using two well-defined tetravalent allergens, each specific for a distinct IgE, thus enabling a systematic approach to evaluate the effect of each allergen and percentage of allergen-specific IgE on mast cell degranulation. We found the overall degranulation response caused by two allergens is additive for low allergen concentrations or low percent specific IgE, does not change for moderate allergen concentrations with moderate to high percent specific IgE, and is reduced for high allergen concentrations with moderate to high percent specific IgE. These results provide further evidence that supraoptimal IgE crosslinking decreases the degranulation response and establishes the two-allergen model as a relevant experimental system to elucidate mast cell degranulation mechanisms.
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Affiliation(s)
- Michael W Handlogten
- Department of Chemical and Biomolecular Engineering, University of Notre Dame, Notre Dame, IN 46556, USA
| | - Peter E Deak
- Department of Chemical and Biomolecular Engineering, University of Notre Dame, Notre Dame, IN 46556, USA
| | - Basar Bilgicer
- Department of Chemical and Biomolecular Engineering, University of Notre Dame, Notre Dame, IN 46556, USA; Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, IN 46556, USA; Advanced Diagnostics and Therapeutics, University of Notre Dame, Notre Dame, IN 46556, USA.
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31
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A designer cell-based histamine-specific human allergy profiler. Nat Commun 2014; 5:4408. [PMID: 25093291 PMCID: PMC4143915 DOI: 10.1038/ncomms5408] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2014] [Accepted: 06/13/2014] [Indexed: 11/09/2022] Open
Abstract
Allergic disorders are markedly increasing in industrialized countries. The identification of compounds that trigger the immunoglobulin E-dependent allergic reaction remains the key to limit patients’ exposure to critical allergens and improve their quality of life. Here we use synthetic biology principles to design a mammalian cell-based allergy profiler that scores the allergen-triggered release of histamine from whole-blood-derived human basophils. A synthetic signalling cascade engineered within the allergy profiler rewires histamine input to the production of reporter protein, thereby integrating histamine levels in whole-blood samples with remarkable sensitivity and a wide dynamic range, allowing for rapid results or long-term storage of output, respectively. This approach provides non-intrusive allergy profiles for the personalized medicine era. The advancement of sensitive, accurate and non-invasive methods to identify the allergen that drives allergic disease in an individual remains a challenge. Here, the authors develop a synthetic biology approach using human designer cells to profile allergic reactions against an array of allergens measuring histamine release from whole blood.
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32
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Abstract
Mast cells (MCs) are tissue-resident sentinels of hematopoietic origin that play a prominent role in allergic diseases. They express the high-affinity receptor for IgE (FcεRI), which when cross-linked by multivalent antigens triggers the release of preformed mediators, generation of arachidonic acid metabolites, and the synthesis of cytokines and chemokines. Stimulation of the FcεRI with increasing antigen concentrations follows a characteristic bell-shaped dose-responses curve. At high antigen concentrations, the so-called supra-optimal conditions, repression of FcεRI-induced responses is facilitated by activation and incorporation of negative signaling regulators. In this context, the SH2-containing inositol-5'-phosphatase, SHIP1, has been demonstrated to be of particular importance. SHIP1 with its catalytic and multiple protein interaction sites provides several layers of control for FcεRI signaling. Regulation of SHIP1 function occurs on various levels, e.g., protein expression, receptor and membrane recruitment, competition for protein-protein interaction sites, and activating modifications enhancing the phosphatase function. Apart from FcεRI-mediated signaling, SHIP1 can be activated by diverse unrelated receptor systems indicating its involvement in the regulation of antigen-dependent cellular responses by autocrine feedback mechanisms or tissue-specific and/or (patho-) physiologically determined factors. Thus, pharmacologic engagement of SHIP1 may represent a beneficial strategy for patients suffering from acute or chronic inflammation or allergies.
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Bounab Y, Getahun A, Cambier JC, Daëron M. Phosphatase regulation of immunoreceptor signaling in T cells, B cells and mast cells. Curr Opin Immunol 2013; 25:313-20. [PMID: 23684445 DOI: 10.1016/j.coi.2013.04.001] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2013] [Revised: 04/12/2013] [Accepted: 04/15/2013] [Indexed: 12/30/2022]
Abstract
Recent progress has begun to reveal the often complex and changing roles of phosphotyrosine and phosphoinositide phosphatases in regulation of immunoreceptor signaling. The resultant confusion has been further increased by discoveries of new players. Here we provide a review of recent progress in defining the roles of these enzymes in immunoreceptor-dependent mast cell, T cell and B cell activation.
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Affiliation(s)
- Yacine Bounab
- Institut Pasteur, Département d'Immunologie, Centre d'Immunologie Humaine, Paris, France
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