51
|
Selective induction of alternatively spliced FynT isoform by TNF facilitates persistent inflammatory responses in astrocytes. Sci Rep 2017; 7:43651. [PMID: 28266558 PMCID: PMC5339870 DOI: 10.1038/srep43651] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2016] [Accepted: 01/25/2017] [Indexed: 11/27/2022] Open
Abstract
Fyn tyrosine kinase has been implicated in the pathogenesis of Alzheimer’s disease (AD). We have previously reported that upregulation of the FynT isoform in AD brains was partly associated with astrocyte activation. In this study, we demonstrated selective FynT induction in murine cortex and primary astrocyte culture after prolonged exposure to inflammatory stimulants, suggesting that FynT may mediate persistent neuroinflammation. To delineate the functional role of astrocytic FynT in association with TNF-mediated inflammatory responses, immortalized normal human astrocytes (iNHA) stably expressing FynT kinase constitutively active (FynT-CA) or kinase dead (FynT-KD) mutants were treated with TNF and compared for inflammatory responses using high-throughput real-time RT-PCR and Luminex multi-analyte immunoassays. FynT-CA but not FynT-KD mutant exhibited drastic induction of proinflammatory cytokines and chemokines after prolonged exposure to TNF, which could be attenuated by treating with Fyn kinase inhibitor PP2 or silencing via FynT-specific DsiRNA. FynT kinase activity-dependent induction of PKCδ expression, PKCδ phosphorylation, as well as NFκB activation was detected at the late phase but not the early phase of TNF signaling. In conclusion, selective FynT induction by TNF may facilitate persistent inflammatory responses in astrocytes, which is highly relevant to chronic neuroinflammation in neurodegenerative diseases including but not limited to AD.
Collapse
|
52
|
Lortholary O, Chandesris MO, Bulai Livideanu C, Paul C, Guillet G, Jassem E, Niedoszytko M, Barete S, Verstovsek S, Grattan C, Damaj G, Canioni D, Fraitag S, Lhermitte L, Georgin Lavialle S, Frenzel L, Afrin LB, Hanssens K, Agopian J, Gaillard R, Kinet JP, Auclair C, Mansfield C, Moussy A, Dubreuil P, Hermine O. Masitinib for treatment of severely symptomatic indolent systemic mastocytosis: a randomised, placebo-controlled, phase 3 study. Lancet 2017; 389:612-620. [PMID: 28069279 PMCID: PMC5985971 DOI: 10.1016/s0140-6736(16)31403-9] [Citation(s) in RCA: 82] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/14/2016] [Revised: 08/04/2016] [Accepted: 08/09/2016] [Indexed: 12/12/2022]
Abstract
BACKGROUND Indolent systemic mastocytosis, including the subvariant of smouldering systemic mastocytosis, is a lifelong condition associated with reduced quality of life. Masitinib inhibits KIT and LYN kinases that are involved in indolent systemic mastocytosis pathogenesis. We aimed to assess safety and efficacy of masitinib versus placebo in severely symptomatic patients who were unresponsive to optimal symptomatic treatments. METHODS In this randomised, double-blind, placebo-controlled, phase 3 study, we enrolled adults (aged 18-75 years) with indolent or smouldering systemic mastocytosis, according to WHO classification or documented mastocytosis based on histological criteria, at 50 centres in 15 countries. We excluded patients with cutaneous or non-severe systemic mastocytosis after a protocol amendment. Patients were centrally randomised (1:1) to receive either oral masitinib (6 mg/kg per day over 24 weeks with possible extension) or matched placebo with minimisation according to severe symptoms. The primary endpoint was cumulative response (≥75% improvement from baseline within weeks 8-24) in at least one severe baseline symptom from the following: pruritus score of 9 or more, eight or more flushes per week, Hamilton Rating Scale for Depression of 19 or more, or Fatigue Impact Scale of 75 or more. We assessed treatment effect using repeated measures methodology for rare diseases via the generalised estimating equation model in a modified intention-to-treat population, including all participants assigned to treatment minus those who withdrew due to a non-treatment-related cause. We assessed safety in all patients who received at least one dose of study drug. This trial is registered with ClinicalTrials.gov, number NCT00814073. FINDINGS Between Feb 19, 2009, and July 15, 2015, 135 patients were randomly assigned to masitinib (n=71) or placebo (n=64). By 24 weeks, masitinib was associated with a cumulative response of 18·7% in the primary endpoint (122·6 responses of 656·5 possible responses [weighted generalised estimating equation]) compared with 7·4% for placebo (48·9 of 656·5; difference 11·3%; odds ratio 3·6; 95% CI 1·2-10·8; p=0·0076). Frequent severe adverse events (>4% difference from placebo) were diarrhoea (eight [11%] of 70 in the masitinib group vs one [2%] of 63 in the placebo group), rash (four [6%] vs none), and asthenia (four [6%] vs one [2%]). The most frequent serious adverse events were diarrhoea (three patients [4%] vs one [2%]) and urticaria (two [3%] vs none), and no life-threatening toxicities occurred. One patient in the placebo group died (unrelated to study treatment). INTERPRETATION These study findings indicate that masitinib is an effective and well tolerated agent for the treatment of severely symptomatic indolent or smouldering systemic mastocytosis. FUNDING AB Science (Paris, France).
Collapse
Affiliation(s)
- Olivier Lortholary
- Department of Infectious Diseases and Tropical Medicine and Centre d'Infectiologie Necker-Pasteur, Université Paris Descartes, Hôpital Necker Enfants Malades, Assistance Publique Hôpitaux de Paris, Paris, France; Centre de Référence des Mastocytoses, Université Paris Descartes, Hôpital Necker Enfants Malades, Assistance Publique Hôpitaux de Paris, Paris, France; Université Paris Descartes, Paris, France
| | - Marie Olivia Chandesris
- Department of Hematology, Université Paris Descartes, Hôpital Necker Enfants Malades, Assistance Publique Hôpitaux de Paris, Paris, France
| | - Cristina Bulai Livideanu
- Department of Dermatology, Mastocytosis Competence Center, Paul Sabatier University, Hôpital Larrey, Toulouse, France
| | - Carle Paul
- Department of Dermatology, Mastocytosis Competence Center, Paul Sabatier University, Hôpital Larrey, Toulouse, France
| | - Gérard Guillet
- Department of Dermatology, CHU Poitiers, University Hospital, Poitiers, France
| | - Ewa Jassem
- Department of Allergology, Medical University of Gdansk, Gdansk, Poland
| | - Marek Niedoszytko
- Department of Allergology, Medical University of Gdansk, Gdansk, Poland
| | - Stéphane Barete
- Department of Dermatology and Allergology, Centre de Référence des Mastocytoses, Université Pierre et Marie Curie, Hôpital Tenon, Assistance Publique Hôpitaux de Paris, Paris, France
| | - Srdan Verstovsek
- Hanns A Pielenz Clinical Research Center for Myeloproliferative Neoplasms, Department of Leukemia, MD Anderson Cancer Center, Houston, TX, USA
| | - Clive Grattan
- Department of Dermatology, Norfolk & Norwich University Hospital, Norwich, UK
| | - Gandhi Damaj
- Department of Haematology, University Hospital of Caen, Institut d'Hématologie de Basse Normandie, School of Medicine, University of Lower Normandy, Caen, France
| | - Danielle Canioni
- Department of Pathology, Université Paris Descartes, Hôpital Necker Enfants Malades, Assistance Publique Hôpitaux de Paris, Paris, France
| | - Sylvie Fraitag
- Department of Pathology, Université Paris Descartes, Hôpital Necker Enfants Malades, Assistance Publique Hôpitaux de Paris, Paris, France
| | - Ludovic Lhermitte
- INSERM U1151 and Laboratory of Onco-Hematology, Université Paris Descartes, Hôpital Necker Enfants Malades, Assistance Publique Hôpitaux de Paris, Paris, France
| | - Sophie Georgin Lavialle
- Department of Internal Medicine, DHU I2B, Université Pierre et Marie Curie, Hôpital Tenon, Assistance Publique Hôpitaux de Paris, Paris, France
| | - Laurent Frenzel
- Department of Hematology, Université Paris Descartes, Hôpital Necker Enfants Malades, Assistance Publique Hôpitaux de Paris, Paris, France; Institut Imagine INSERM U1163 and CNRS ERL8654, Université Paris Descartes, Hôpital Necker Enfants Malades, Assistance Publique Hôpitaux de Paris, Paris, France
| | - Lawrence B Afrin
- Division of Hematology, Oncology & Transplantation, University of Minnesota, Minneapolis, MN, USA
| | - Katia Hanssens
- Centre de Référence des Mastocytoses, Université Paris Descartes, Hôpital Necker Enfants Malades, Assistance Publique Hôpitaux de Paris, Paris, France; AB Science, Paris, France
| | - Julie Agopian
- Centre de Référence des Mastocytoses, Université Paris Descartes, Hôpital Necker Enfants Malades, Assistance Publique Hôpitaux de Paris, Paris, France; AB Science, Paris, France
| | - Raphael Gaillard
- Human Histopathology and Animal Models, Infection and Epidemiology Department, Institut Pasteur; Université Paris Descartes; Centre Hospitalier Sainte-Anne, Paris, France
| | - Jean-Pierre Kinet
- Department of Pathology, Harvard Medical School and Beth Israel Deaconess Medical Center, Boston, MA, USA
| | - Christian Auclair
- Laboratoire de Biologie et Pharmacologie appliqué, CNRS UMR 8113, Ecole Normale Supérieure de Cachan, Université Paris Saclay, Paris, France; AB Science, Paris, France
| | | | | | - Patrice Dubreuil
- Centre de Référence des Mastocytoses, Université Paris Descartes, Hôpital Necker Enfants Malades, Assistance Publique Hôpitaux de Paris, Paris, France; INSERM U1068, CRCM (Signaling, Hematopoiesis and Mechanism of Oncogenesis), Institut Paoli-Calmettes, Aix-Marseille Université, CNRS, UMR7258, Marseille, France; AB Science, Paris, France; INSERM, La Ligue Nationale Contre le Cancer (équipe labelliseé), Paris, France
| | - Olivier Hermine
- Department of Hematology, Université Paris Descartes, Hôpital Necker Enfants Malades, Assistance Publique Hôpitaux de Paris, Paris, France; Institut Imagine INSERM U1163 and CNRS ERL8654, Université Paris Descartes, Hôpital Necker Enfants Malades, Assistance Publique Hôpitaux de Paris, Paris, France; AB Science, Paris, France.
| |
Collapse
|
53
|
Shi L, Xu H, Wu Y, Li X, Zou L, Gao J, Chen H. Alpha7-nicotinic acetylcholine receptors involve the imidacloprid-induced inhibition of IgE-mediated rat and human mast cell activation. RSC Adv 2017. [DOI: 10.1039/c7ra07862e] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Although our recent study indicated that imidacloprid, a widely used neonicotinoid insecticide, inhibited IgE-mediated mast cell activation, the inhibition mechanism still remains unclear.
Collapse
Affiliation(s)
- Linbo Shi
- State Key Laboratory of Food Science and Technology
- Nanchang University
- Nanchang
- China
- Sino-German Joint Research Institute
| | - Huaping Xu
- Department of Rehabilitation
- The First Affiliated Hospital of Nanchang University
- Nanchang
- China
| | - Yujie Wu
- State Key Laboratory of Food Science and Technology
- Nanchang University
- Nanchang
- China
- Sino-German Joint Research Institute
| | - Xin Li
- State Key Laboratory of Food Science and Technology
- Nanchang University
- Nanchang
- China
- School of Food Science and Technology
| | - Li Zou
- State Key Laboratory of Food Science and Technology
- Nanchang University
- Nanchang
- China
- Sino-German Joint Research Institute
| | - Jinyan Gao
- School of Food Science and Technology
- Nanchang University
- Nanchang
- China
| | - Hongbing Chen
- State Key Laboratory of Food Science and Technology
- Nanchang University
- Nanchang
- China
- Sino-German Joint Research Institute
| |
Collapse
|
54
|
Sibilano R, Gaudenzio N, DeGorter MK, Reber LL, Hernandez JD, Starkl PM, Zurek OW, Tsai M, Zahner S, Montgomery SB, Roers A, Kronenberg M, Yu M, Galli SJ. A TNFRSF14-FcɛRI-mast cell pathway contributes to development of multiple features of asthma pathology in mice. Nat Commun 2016; 7:13696. [PMID: 27982078 PMCID: PMC5171877 DOI: 10.1038/ncomms13696] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2016] [Accepted: 10/26/2016] [Indexed: 01/07/2023] Open
Abstract
Asthma has multiple features, including airway hyperreactivity, inflammation and remodelling. The TNF superfamily member TNFSF14 (LIGHT), via interactions with the receptor TNFRSF14 (HVEM), can support TH2 cell generation and longevity and promote airway remodelling in mouse models of asthma, but the mechanisms by which TNFSF14 functions in this setting are incompletely understood. Here we find that mouse and human mast cells (MCs) express TNFRSF14 and that TNFSF14:TNFRSF14 interactions can enhance IgE-mediated MC signalling and mediator production. In mouse models of asthma, TNFRSF14 blockade with a neutralizing antibody administered after antigen sensitization, or genetic deletion of Tnfrsf14, diminishes plasma levels of antigen-specific IgG1 and IgE antibodies, airway hyperreactivity, airway inflammation and airway remodelling. Finally, by analysing two types of genetically MC-deficient mice after engrafting MCs that either do or do not express TNFRSF14, we show that TNFRSF14 expression on MCs significantly contributes to the development of multiple features of asthma pathology.
Collapse
Affiliation(s)
- Riccardo Sibilano
- Department of Pathology, Stanford University School of Medicine, Stanford, California 94305, USA
| | - Nicolas Gaudenzio
- Department of Pathology, Stanford University School of Medicine, Stanford, California 94305, USA
| | - Marianne K. DeGorter
- Department of Pathology, Stanford University School of Medicine, Stanford, California 94305, USA
- Department of Genetics, Stanford University School of Medicine, Stanford, California 94305, USA
| | - Laurent L. Reber
- Department of Pathology, Stanford University School of Medicine, Stanford, California 94305, USA
- Department of Immunology, Unit of Antibodies in Therapy and Pathology, INSERM U1222, Institut Pasteur, Paris 75015, France
| | - Joseph D. Hernandez
- Department of Pathology, Stanford University School of Medicine, Stanford, California 94305, USA
- Department of Pediatrics, Stanford University School of Medicine, Stanford, California 94305, USA
| | - Philipp M. Starkl
- Department of Pathology, Stanford University School of Medicine, Stanford, California 94305, USA
- CeMM Research Center for Molecular Medicine of the Austrian Academy of Sciences and Department of Medicine I, Research Laboratory of Infection Biology, Medical University of Vienna, Vienna 1090, Austria
| | - Oliwia W. Zurek
- Department of Pathology, Stanford University School of Medicine, Stanford, California 94305, USA
| | - Mindy Tsai
- Department of Pathology, Stanford University School of Medicine, Stanford, California 94305, USA
| | - Sonja Zahner
- Division of Developmental Immunology, La Jolla Institute for Allergy and Immunology, La Jolla, California 92037, USA
| | - Stephen B. Montgomery
- Department of Pathology, Stanford University School of Medicine, Stanford, California 94305, USA
- Department of Genetics, Stanford University School of Medicine, Stanford, California 94305, USA
| | - Axel Roers
- Institute for Immunology, Technische Universität Dresden, Dresden 01307, Germany
| | - Mitchell Kronenberg
- Division of Developmental Immunology, La Jolla Institute for Allergy and Immunology, La Jolla, California 92037, USA
| | - Mang Yu
- Department of Pathology, Stanford University School of Medicine, Stanford, California 94305, USA
| | - Stephen J. Galli
- Department of Pathology, Stanford University School of Medicine, Stanford, California 94305, USA
- Department of Microbiology and Immunology and Sean N. Parker Center for Allergy and Asthma Research, Stanford University School of Medicine, Stanford, California 94305, USA
| |
Collapse
|
55
|
Alsaleh NB, Persaud I, Brown JM. Silver Nanoparticle-Directed Mast Cell Degranulation Is Mediated through Calcium and PI3K Signaling Independent of the High Affinity IgE Receptor. PLoS One 2016; 11:e0167366. [PMID: 27907088 PMCID: PMC5131952 DOI: 10.1371/journal.pone.0167366] [Citation(s) in RCA: 44] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2016] [Accepted: 11/13/2016] [Indexed: 12/20/2022] Open
Abstract
Engineered nanomaterial (ENM)-mediated toxicity often involves triggering immune responses. Mast cells can regulate both innate and adaptive immune responses and are key effectors in allergic diseases and inflammation. Silver nanoparticles (AgNPs) are one of the most prevalent nanomaterials used in consumer products due to their antimicrobial properties. We have previously shown that AgNPs induce mast cell degranulation that was dependent on nanoparticle physicochemical properties. Furthermore, we identified a role for scavenger receptor B1 (SR-B1) in AgNP-mediated mast cell degranulation. However, it is completely unknown how SR-B1 mediates mast cell degranulation and the intracellular signaling pathways involved. In the current study, we hypothesized that SR-B1 interaction with AgNPs directs mast cell degranulation through activation of signal transduction pathways that culminate in an increase in intracellular calcium signal leading to mast cell degranulation. For these studies, we utilized bone marrow-derived mast cells (BMMC) isolated from C57Bl/6 mice and RBL-2H3 cells (rat basophilic leukemia cell line). Our data support our hypothesis and show that AgNP-directed mast cell degranulation involves activation of PI3K, PLCγ and an increase in intracellular calcium levels. Moreover, we found that influx of extracellular calcium is required for the cells to degranulate in response to AgNP exposure and is mediated at least partially via the CRAC channels. Taken together, our results provide new insights into AgNP-induced mast cell activation that are key for designing novel ENMs that are devoid of immune system activation.
Collapse
Affiliation(s)
- Nasser B. Alsaleh
- Department of Pharmaceutical Sciences, Skaggs School of Pharmacy and Pharmaceutical Sciences, The University of Colorado Anschutz Medical Campus, Aurora, Colorado, United States of America
| | - Indushekhar Persaud
- Department of Pharmaceutical Sciences, Skaggs School of Pharmacy and Pharmaceutical Sciences, The University of Colorado Anschutz Medical Campus, Aurora, Colorado, United States of America
| | - Jared M. Brown
- Department of Pharmaceutical Sciences, Skaggs School of Pharmacy and Pharmaceutical Sciences, The University of Colorado Anschutz Medical Campus, Aurora, Colorado, United States of America
- * E-mail:
| |
Collapse
|
56
|
Ang WG, Church AM, Kulis M, Choi HW, Burks AW, Abraham SN. Mast cell desensitization inhibits calcium flux and aberrantly remodels actin. J Clin Invest 2016; 126:4103-4118. [PMID: 27669462 PMCID: PMC5096925 DOI: 10.1172/jci87492] [Citation(s) in RCA: 62] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2016] [Accepted: 08/16/2016] [Indexed: 11/17/2022] Open
Abstract
Rush desensitization (DS) is a widely used and effective clinical strategy for the rapid inhibition of IgE-mediated anaphylactic responses. However, the cellular targets and underlying mechanisms behind this process remain unclear. Recent studies have implicated mast cells (MCs) as the primary target cells for DS. Here, we developed a murine model of passive anaphylaxis with demonstrated MC involvement and an in vitro assay to evaluate the effect of DS on MCs. In contrast with previous reports, we determined that functional IgE remains on the cell surface of desensitized MCs following DS. Despite notable reductions in MC degranulation following DS, the high-affinity IgE receptor FcεRI was still capable of transducing signals in desensitized MCs. Additionally, we found that displacement of the actin cytoskeleton and its continued association with FcεRI impede the capacity of desensitized MCs to evoke the calcium response that is essential for MC degranulation. Together, these findings suggest that reduced degranulation responses in desensitized MCs arise from aberrant actin remodeling, providing insights that may lead to improvement of DS treatments for anaphylactic responses.
Collapse
Affiliation(s)
- W.X. Gladys Ang
- Department of Molecular Genetics and Microbiology, Duke University Medical Center, Durham, North Carolina, USA
| | - Alison M. Church
- GlaxoSmithKline, Rare Diseases Unit, Research Triangle Park, North Carolina, USA
| | - Mike Kulis
- Department of Pediatrics, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, USA
| | | | - A. Wesley Burks
- Department of Pediatrics, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, USA
| | - Soman N. Abraham
- Department of Molecular Genetics and Microbiology, Duke University Medical Center, Durham, North Carolina, USA
- Department of Pathology and
- Department of Immunology, Duke University Medical Center, Durham, North Carolina, USA
- Program in Emerging Infectious Diseases, Duke–National University of Singapore, Singapore
| |
Collapse
|
57
|
Revez JA, Matheson MC, Hui J, Baltic S, James A, Upham JW, Dharmage S, Thompson PJ, Martin NG, Hopper JL, Ferreira MAR. Identification of STOML2 as a putative novel asthma risk gene associated with IL6R. Allergy 2016; 71:1020-30. [PMID: 26932604 DOI: 10.1111/all.12869] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/25/2016] [Indexed: 01/05/2023]
Abstract
BACKGROUND Functional variants in the interleukin-6 receptor gene (IL6R) are associated with asthma risk. We hypothesized that genes co-expressed with IL6R might also be regulated by genetic polymorphisms that are associated with asthma risk. The aim of this study was to identify such genes. METHODS To identify genes whose expression was correlated with that of IL6R, we analyzed gene expression levels generated for 373 human lymphoblastoid cell lines by the Geuvadis consortium and for 38 hematopoietic cell types by the Differentiation Map Portal (DMAP) project. Genes correlated with IL6R were then screened for nearby single nucleotide polymorphisms (SNPs) that were significantly associated with both variation in gene expression levels (eSNPs) and asthma risk. RESULTS We identified 90 genes with expression levels correlated with those of IL6R and that also had a nearby eSNP associated with disease risk in a published asthma GWAS (N = 20 776). For 16 (18%) genes, the association between the eSNP and asthma risk replicated with the same direction of effect in a further independent published asthma GWAS (N = 27 378). Among the top replicated associations (FDR < 0.05) were eSNPs for four known (IL18R1, IL18RAP, BCL6, and STAT6) and one putative novel asthma risk gene, stomatin-like protein 2 (STOML2). The expression of STOML2 was negatively correlated with IL6R, while eSNPs that increased the expression of STOML2 were associated with an increased asthma risk. CONCLUSION The expression of STOML2, a gene that plays a key role in mitochondrial function and T-cell activation, is associated with both IL-6 signaling and asthma risk.
Collapse
Affiliation(s)
- J. A. Revez
- QIMR Berghofer Medical Research Institute; Brisbane Qld Australia
| | - M. C. Matheson
- Melbourne School of Population and Global Health; The University of Melbourne; Melbourne Vic. Australia
| | - J. Hui
- PathWest Laboratory Medicine of Western Australia (WA); Nedlands WA Australia
- School of Population Health; The University of WA; Nedlands WA Australia
- School of Pathology and Laboratory Medicine; The University of WA; Nedlands WA Australia
- Busselton Population Medical Research Institute; Sir Charles Gairdner Hospital; Perth WA Australia
| | - S. Baltic
- Institute for Respiratory Health; University of WA; Perth WA Australia
| | - A. James
- Busselton Population Medical Research Institute; Sir Charles Gairdner Hospital; Perth WA Australia
- School of Medicine and Pharmacology; University of Western Australia; Nedlands WA Australia
- Department of Pulmonary Physiology; West Australian Sleep Disorders Research Institute; Nedlands WA Australia
| | - J. W. Upham
- School of Medicine; Translational Research Institute; The University of Queensland; Brisbane Qld Australia
| | - S. Dharmage
- Melbourne School of Population and Global Health; The University of Melbourne; Melbourne Vic. Australia
| | - P. J. Thompson
- Institute for Respiratory Health; University of WA; Perth WA Australia
- School of Medicine and Pharmacology; University of Western Australia; Nedlands WA Australia
| | - N. G. Martin
- QIMR Berghofer Medical Research Institute; Brisbane Qld Australia
| | - J. L. Hopper
- Melbourne School of Population and Global Health; The University of Melbourne; Melbourne Vic. Australia
| | | | | |
Collapse
|
58
|
Choi JY, Jeon SJ, Son KH, Park YI, Dong MS. Induction of mast cell degranulation by triterpenoidal saponins obtained from Cimicifugae rhizoma. Immunopharmacol Immunotoxicol 2016; 38:311-8. [PMID: 27310149 DOI: 10.1080/08923973.2016.1201101] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
Cimicifugae rhizoma has been widely used as a traditional herbal medicine to treat inflammation and menopausal symptoms. In this study, we found that some of the triterpenoidal saponins purified from the ethanol extract of Cimicifugae rhizoma dramatically induced histamine release. The structure-related induction of mast cell degranulation by them and the mechanism of action were determined. β-Hexosaminidase release in HMC-1 cells was increased in a concentration-dependent manner, with maximal 6.5- and 8.5-fold increases, by 200 μg/mL 24-epi-7,8-didehydrocimigenol-3-O-xyloside (comp 1) and cimigenol 3-O-beta-d-xyloside (comp 4) compared with those treated with phorbol 12-myristate 13-acetate and A23187 (PMACI), respectively. However, β-hexosaminidase release was not changed by 7,8-dihydrocimigenol (comp 3), or 23-OAc-shengmanol-3-O-xyloside (comp 7). These triterpenoidal saponins changed neither the intracellular Ca(2+ )level nor the activation of PKC, both of which play essential roles in histamine release. However, cromolyn and ketotifen, membrane stabilizers, effectively inhibited the β-hexosaminidase release induced by comp 1 or comp 4 by 39 and 45%, respectively. Collectively, xylose on the cimigenol-related backbone among triterpene glycosides isolated from Cimicifugae rhizoma may play an important role in activating mast cells and induction of degranulation partly via membrane destabilization of mast cells.
Collapse
Affiliation(s)
- Ji-Yoon Choi
- a School of Life Sciences and Biotechnology, Korea University , Seoul , Republic of Korea
| | - Su Jin Jeon
- b Department of Food and Nutrition , Andong National University , Andong , Republic of Korea
| | - Kun Ho Son
- b Department of Food and Nutrition , Andong National University , Andong , Republic of Korea
| | - Young In Park
- c College of Pharmacy, Korea University , Sejong , Republic of Korea
| | - Mi-Sook Dong
- a School of Life Sciences and Biotechnology, Korea University , Seoul , Republic of Korea
| |
Collapse
|
59
|
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.
Collapse
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
| |
Collapse
|
60
|
Martín-Ávila A, Medina-Tamayo J, Ibarra-Sánchez A, Vázquez-Victorio G, Castillo-Arellano JI, Hernández-Mondragón AC, Rivera J, Madera-Salcedo IK, Blank U, Macías-Silva M, González-Espinosa C. Protein Tyrosine Kinase Fyn Regulates TLR4-Elicited Responses on Mast Cells Controlling the Function of a PP2A-PKCα/β Signaling Node Leading to TNF Secretion. THE JOURNAL OF IMMUNOLOGY 2016; 196:5075-88. [PMID: 27183589 DOI: 10.4049/jimmunol.1501823] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/13/2015] [Accepted: 04/16/2016] [Indexed: 12/21/2022]
Abstract
Mast cells produce proinflammatory cytokines in response to TLR4 ligands, but the signaling pathways involved are not fully described. In this study, the participation of the Src family kinase Fyn in the production of TNF after stimulation with LPS was evaluated using bone marrow-derived mast cells from wild-type and Fyn-deficient mice. Fyn(-/-) cells showed higher LPS-induced secretion of preformed and de novo-synthesized TNF. In both cell types, TNF colocalized with vesicle-associated membrane protein (VAMP)3-positive compartments. Addition of LPS provoked coalescence of VAMP3 and its interaction with synaptosomal-associated protein 23; those events were increased in the absence of Fyn. Higher TNF mRNA levels were also observed in Fyn-deficient cells as a result of increased transcription and greater mRNA stability after LPS treatment. Fyn(-/-) cells also showed higher LPS-induced activation of TAK-1 and ERK1/2, whereas IκB kinase and IκB were phosphorylated, even in basal conditions. Increased responsiveness in Fyn(-/-) cells was associated with a lower activity of protein phosphatase 2A (PP2A) and augmented activity of protein kinase C (PKC)α/β, which was dissociated from PP2A and increased its association with the adapter protein neuroblast differentiation-associated protein (AHNAK, desmoyokin). LPS-induced PKCα/β activity was associated with VAMP3 coalescence in WT and Fyn-deficient cells. Reconstitution of MC-deficient Wsh mice with Fyn(-/-) MCs produced greater LPS-dependent production of TNF in the peritoneal cavity. Our data show that Fyn kinase is activated after TLR4 triggering and exerts an important negative control on LPS-dependent TNF production in MCs controlling the inactivation of PP2Ac and activation of PKCα/β necessary for the secretion of TNF by VAMP3(+) carriers.
Collapse
Affiliation(s)
- Alejandro Martín-Ávila
- Departamento de Farmacobiología, Centro de Investigación y Estudios Avanzados del Instituto Politécnico Nacional, Sede Sur, Tlalpan, CP 14330 Mexico City, Mexico
| | - Jaciel Medina-Tamayo
- Departamento de Farmacobiología, Centro de Investigación y Estudios Avanzados del Instituto Politécnico Nacional, Sede Sur, Tlalpan, CP 14330 Mexico City, Mexico
| | - Alfredo Ibarra-Sánchez
- Departamento de Farmacobiología, Centro de Investigación y Estudios Avanzados del Instituto Politécnico Nacional, Sede Sur, Tlalpan, CP 14330 Mexico City, Mexico
| | - Genaro Vázquez-Victorio
- Departamento de Biología Celular y del Desarrollo, Instituto de Fisiología Celular, Universidad Nacional Autónoma de México, Ciudad Universitaria, CP 04510 Mexico City, Mexico
| | - Jorge Iván Castillo-Arellano
- Departamento de Farmacobiología, Centro de Investigación y Estudios Avanzados del Instituto Politécnico Nacional, Sede Sur, Tlalpan, CP 14330 Mexico City, Mexico
| | - Alma Cristal Hernández-Mondragón
- Departamento de Farmacobiología, Centro de Investigación y Estudios Avanzados del Instituto Politécnico Nacional, Sede Sur, Tlalpan, CP 14330 Mexico City, Mexico
| | - Juan Rivera
- National Institute of Arthritis and Musculoskeletal and Skin Diseases, National Institutes of Health, Bethesda, MD 20892-1820; and
| | - Iris K Madera-Salcedo
- INSERM UMRS1149, Faculté de Médecine, Université Paris-Diderot, Site X, Bichat, Paris 75018, France
| | - Ulrich Blank
- INSERM UMRS1149, Faculté de Médecine, Université Paris-Diderot, Site X, Bichat, Paris 75018, France
| | - Marina Macías-Silva
- Departamento de Biología Celular y del Desarrollo, Instituto de Fisiología Celular, Universidad Nacional Autónoma de México, Ciudad Universitaria, CP 04510 Mexico City, Mexico
| | - Claudia González-Espinosa
- Departamento de Farmacobiología, Centro de Investigación y Estudios Avanzados del Instituto Politécnico Nacional, Sede Sur, Tlalpan, CP 14330 Mexico City, Mexico;
| |
Collapse
|
61
|
Blank U, Charles N, Benhamou M. The high-affinity immunoglobulin E receptor as pharmacological target. Eur J Pharmacol 2016; 778:24-32. [DOI: 10.1016/j.ejphar.2015.05.070] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/25/2014] [Revised: 04/29/2015] [Accepted: 05/17/2015] [Indexed: 01/02/2023]
|
62
|
Fyn kinase genetic ablation causes structural abnormalities in mature retina and defective Müller cell function. Mol Cell Neurosci 2016; 72:91-100. [DOI: 10.1016/j.mcn.2016.01.008] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2015] [Revised: 01/19/2016] [Accepted: 01/21/2016] [Indexed: 11/24/2022] Open
|
63
|
Shirley D, McHale C, Gomez G. Resveratrol preferentially inhibits IgE-dependent PGD2 biosynthesis but enhances TNF production from human skin mast cells. Biochim Biophys Acta Gen Subj 2016; 1860:678-85. [PMID: 26777630 DOI: 10.1016/j.bbagen.2016.01.006] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2015] [Revised: 12/21/2015] [Accepted: 01/12/2016] [Indexed: 10/22/2022]
Abstract
BACKGROUND Resveratrol, a natural polyphenol found in the skin of red grapes, is reported to have anti-inflammatory properties including protective effects against aging. Consequently, Resveratrol is a common nutritional supplement and additive in non-prescription lotions and creams marketed as anti-aging products. Studies in mice and with mouse bone marrow-derived mast cells (BMMCs) have indicated anti-allergic effects of Resveratrol. However, the effects of Resveratrol on human primary mast cells have not been reported. METHODS Human mast cells were isolated and purified from normal skin tissue of different donors. The effect of Resveratrol on IgE-dependent release of allergic inflammatory mediators was determined using various immunoassays, Western blotting, and quantitative real-time PCR. RESULTS Resveratrol at low concentrations (≤10 μM) inhibited PGD2 biosynthesis but not degranulation. Accordingly, COX-2 expression was inhibited but phosphorylation of Syk, Akt, p38, and p42/44 (ERKs) remained intact. Surprisingly, TNF production was significantly enhanced with Resveratrol. At a high concentration (100 μM), Resveratrol significantly inhibited all parameters analyzed except Syk phosphorylation. CONCLUSIONS Here, we show that Resveratrol at low concentrations exerts its anti-inflammatory properties by preferentially targeting the arachidonic acid pathway. We also demonstrate a previously unrecognized pro-inflammatory effect of Resveratrol--the enhancement of TNF production from human mature mast cells following IgE-dependent activation. GENERAL SIGNIFICANCE These findings suggest that Resveratrol as a therapeutic agent could inhibit PGD2-mediated inflammation but would be ineffective against histamine-mediated allergic reactions. However, Resveratrol could potentially exacerbate or promote allergic inflammation by enhancing IgE-dependent TNF production from mast cells in human skin.
Collapse
Affiliation(s)
- Devon Shirley
- Department of Pathology, Microbiology and Immunology, University of South Carolina School of Medicine, Columbia, SC, USA.
| | - Cody McHale
- Department of Pathology, Microbiology and Immunology, University of South Carolina School of Medicine, Columbia, SC, USA.
| | - Gregorio Gomez
- Department of Pathology, Microbiology and Immunology, University of South Carolina School of Medicine, Columbia, SC, USA.
| |
Collapse
|
64
|
Daëron M. Innate myeloid cells under the control of adaptive immunity: the example of mast cells and basophils. Curr Opin Immunol 2015; 38:101-8. [PMID: 26745401 DOI: 10.1016/j.coi.2015.12.004] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2015] [Revised: 12/09/2015] [Accepted: 12/10/2015] [Indexed: 01/13/2023]
Abstract
Mast cells and basophils are mostly known as the initiators of IgE-dependent allergic reactions. They, however, contribute to innate immunity against pathogens and venoms. Like other myeloid cells, they also express receptors for the Fc portion of IgG antibodies. These include activating receptors and inhibitory receptors. Because IgG antibodies are produced in exceedingly higher amounts than IgE antibodies, IgG receptors are co-engaged with IgE receptors under physiological conditions. Mast cells and basophils are examples of the many innate myeloid cells whose effector functions are used and finely tuned by antibodies. They can be thus enrolled in a variety of adaptive immune responses, their activation can be regulated, positively and negatively and their biological responses can be modulated qualitatively by antibodies.
Collapse
Affiliation(s)
- Marc Daëron
- Institut Pasteur, 25 rue du Docteur Roux, 75015 Paris, France; Centre d'immunologie de Marseille-Luminy, Université Aix Marseille UM2, Inserm U1104, CNRS UMR7280, 13288 Marseille, France.
| |
Collapse
|
65
|
The natural compound nujiangexanthone A suppresses mast cell activation and allergic asthma. Biochem Pharmacol 2015; 100:61-72. [PMID: 26571438 DOI: 10.1016/j.bcp.2015.11.004] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2015] [Accepted: 11/02/2015] [Indexed: 12/21/2022]
Abstract
Mast cells play an important role in allergic diseases such as asthma, allergic rhinitis and atopic dermatitis. The genus Garcinia of the family Guttiferae is well known as a prolific source of polycyclic polyprenylated acylphloroglucinols and bioactive prenylated xanthones, which exhibit various biological activities including antibacterial, antifungal, anti-inflammatory, antioxidant, and cytotoxic effects. Nujiangexanthone A (N7) is a novel compound isolated from the leaves of Garcinia nujiangensis. In this paper, we sought to determine the anti-allergic and anti-inflammation activity of N7 in vivo and its mechanism in vitro. We found N7 suppressed IgE/Ag induced mast cell activiation, including degranulation and production of cytokines and eicosanoids, through inhibiting Src kinase activity and Syk dependent pathways. N7 inhibited histamine release, prostaglandin D2 and leukotriene C4 generation in mast cell dependent passive cutaneous anaphylaxis animal model. We also found N7 inhibited the IL-4, IL-5, IL-13 and IgE levels in ovalbumin-induced asthma model. Histological studies demonstrated that N7 substantially inhibited OVA-induced cellular infiltration and increased mucus production in the lung tissue. Our study reveals the anti-allergic function of N7, thereby suggesting the utility of this compound as a possible novel agent for preventing mast cell-related immediate and delayed allergic diseases.
Collapse
|
66
|
Lu Y, Cai S, Tan H, Fu W, Zhang H, Xu H. Inhibitory effect of oblongifolin C on allergic inflammation through the suppression of mast cell activation. Mol Cell Biochem 2015; 406:263-71. [DOI: 10.1007/s11010-015-2444-9] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2015] [Accepted: 05/06/2015] [Indexed: 11/24/2022]
|
67
|
Lee CG, Koo JH, Kim SG. Phytochemical regulation of Fyn and AMPK signaling circuitry. Arch Pharm Res 2015; 38:2093-105. [PMID: 25951818 DOI: 10.1007/s12272-015-0611-x] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2015] [Accepted: 04/27/2015] [Indexed: 01/03/2023]
Abstract
During the past decades, phytochemical terpenoids, polyphenols, lignans, flavonoids, and alkaloids have been identified as antioxidative and cytoprotective agents. Adenosine monophosphate-activated protein kinase (AMPK) is a kinase that controls redox-state and oxidative stress in the cell, and serves as a key molecule regulating energy metabolism. Many phytochemicals directly or indirectly alter the AMPK pathway in distinct manners, exerting catabolic metabolism. Some of them are considered promising in the treatment of metabolic diseases such as type II diabetes, obesity, and hyperlipidemia. Another important kinase that regulates energy metabolism is Fyn kinase, a member of the Src family kinases that plays a role in various cellular responses such as insulin signaling, cell growth, oxidative stress and apoptosis. Phytochemical inhibition of Fyn leads to AMPK-mediated protection of the cell in association with increased antioxidative capacity and mitochondrial biogenesis. The kinases may work together to form a signaling circuitry for the homeostasis of energy conservation and expenditure, and may serve as targets of phytochemicals. This review is intended as a compilation of recent advancements in the pharmacological research of phytochemicals targeting Fyn and AMPK circuitry, providing information for the prevention and treatment of metabolic diseases and the accompanying tissue injuries.
Collapse
Affiliation(s)
- Chan Gyu Lee
- College of Pharmacy, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul, 151-742, Korea.
| | - Ja Hyun Koo
- College of Pharmacy, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul, 151-742, Korea.
| | - Sang Geon Kim
- College of Pharmacy, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul, 151-742, Korea.
| |
Collapse
|
68
|
Draber P, Halova I, Polakovicova I, Kawakami T. Signal transduction and chemotaxis in mast cells. Eur J Pharmacol 2015; 778:11-23. [PMID: 25941081 DOI: 10.1016/j.ejphar.2015.02.057] [Citation(s) in RCA: 57] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2014] [Revised: 02/09/2015] [Accepted: 02/17/2015] [Indexed: 01/08/2023]
Abstract
Mast cells play crucial roles in both innate and adaptive arms of the immune system. Along with basophils, mast cells are essential effector cells for allergic inflammation that causes asthma, allergic rhinitis, food allergy and atopic dermatitis. Mast cells are usually increased in inflammatory sites of allergy and, upon activation, release various chemical, lipid, peptide and protein mediators of allergic reactions. Since antigen/immunoglobulin E (IgE)-mediated activation of these cells is a central event to trigger allergic reactions, innumerable studies have been conducted on how these cells are activated through cross-linking of the high-affinity IgE receptor (FcεRI). Development of mature mast cells from their progenitor cells is under the influence of several growth factors, of which the stem cell factor (SCF) seems to be the most important. Therefore, how SCF induces mast cell development and activation via its receptor, KIT, has been studied extensively, including a cross-talk between KIT and FcεRI signaling pathways. Although our understanding of the signaling mechanisms of the FcεRI and KIT pathways is far from complete, pharmaceutical applications of the knowledge about these pathways are underway. This review will focus on recent progresses in FcεRI and KIT signaling and chemotaxis.
Collapse
Affiliation(s)
- Petr Draber
- Department of Signal Transduction, Institute of Molecular Genetics, Academy of Sciences of the Czech Republic, CZ 14220 Prague, Czech Republic.
| | - Ivana Halova
- Department of Signal Transduction, Institute of Molecular Genetics, Academy of Sciences of the Czech Republic, CZ 14220 Prague, Czech Republic
| | - Iva Polakovicova
- Department of Signal Transduction, Institute of Molecular Genetics, Academy of Sciences of the Czech Republic, CZ 14220 Prague, Czech Republic
| | - Toshiaki Kawakami
- Division of Cell Biology, La Jolla Institute for Allergy and Immunology, 9420 Athena Circle La Jolla, CA 92037, USA; Laboratory for Allergic Disease, RIKEN Center for Integrative Medical Sciences (IMS-RCAI), Yokohama 230-0045, Japan
| |
Collapse
|
69
|
Lee JH, Kim TH, Kim HS, Kim AR, Kim DK, Nam ST, Kim HW, Park YH, Her E, Park YM, Kim HS, Kim YM, Choi WS. An indoxyl compound 5-bromo-4-chloro-3-indolyl 1,3-diacetate, CAC-0982, suppresses activation of Fyn kinase in mast cells and IgE-mediated allergic responses in mice. Toxicol Appl Pharmacol 2015; 285:179-86. [PMID: 25902337 DOI: 10.1016/j.taap.2015.04.009] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2014] [Revised: 01/16/2015] [Accepted: 04/01/2015] [Indexed: 11/17/2022]
Abstract
Mast cells, constituents of virtually all organs and tissues, are critical cells in IgE-mediated allergic responses. The aim of this study was to investigate the effect and mechanism of an indoxyl chromogenic compound, 5-bromo-4-chloro-3-indolyl 1,3-diacetate, CAC-0982, on IgE-mediated mast cell activation and allergic responses in mice. CAC-0982 reversibly suppressed antigen-stimulated degranulation in murine mast cells (IC50, ~3.8μM) and human mast cells (IC50, ~3.0μM). CAC-0982 also inhibited the expression and secretion of IL-4 and TNF-α in mast cells. Furthermore, CAC-0982 suppressed the mast cell-mediated allergic responses in mice in a dose-dependent manner (ED50 27.9mg/kg). As for the mechanism, CAC-0982 largely suppressed the phosphorylation of Syk and its downstream signaling molecules, including LAT, Akt, Erk1/2, p38, and JNK. Notably, the tyrosine kinase assay of antigen-stimulated mast cells showed that CAC-0982 inhibited Fyn kinase, one of the upstream tyrosine kinases for Syk activation in mast cells. Taken together, these results suggest that CAC-0982 may be used as a new treatment for regulating IgE-mediated allergic diseases through the inhibition of the Fyn/Syk pathway in mast cells.
Collapse
Affiliation(s)
- Jun Ho Lee
- Department of Immunology, School of Medicine, Konkuk University, Chungju 380-701, Republic of Korea; College of Medicine, Korea University, Seoul 136-701, Republic of Korea
| | - Tae Hyung Kim
- College of Pharmacy, Sungkyunkwan University, Suwon 440-746, Republic of Korea
| | - Hyuk Soon Kim
- Department of Immunology, School of Medicine, Konkuk University, Chungju 380-701, Republic of Korea
| | - A-Ram Kim
- Department of Immunology, School of Medicine, Konkuk University, Chungju 380-701, Republic of Korea
| | - Do-Kyun Kim
- Department of Immunology, School of Medicine, Konkuk University, Chungju 380-701, Republic of Korea; Laboratory of Allergic Diseases, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD, USA
| | - Seung Taek Nam
- Department of Immunology, School of Medicine, Konkuk University, Chungju 380-701, Republic of Korea
| | - Hyun Woo Kim
- Department of Immunology, School of Medicine, Konkuk University, Chungju 380-701, Republic of Korea
| | - Young Hwan Park
- Department of Immunology, School of Medicine, Konkuk University, Chungju 380-701, Republic of Korea
| | - Erk Her
- Department of Immunology, School of Medicine, Konkuk University, Chungju 380-701, Republic of Korea
| | - Yeong Min Park
- Department of Immunology, School of Medicine, Konkuk University, Chungju 380-701, Republic of Korea
| | - Hyung Sik Kim
- College of Pharmacy, Sungkyunkwan University, Suwon 440-746, Republic of Korea
| | - Young Mi Kim
- College of Pharmacy, Duksung Women's University, Seoul 132-714, Republic of Korea
| | - Wahn Soo Choi
- Department of Immunology, School of Medicine, Konkuk University, Chungju 380-701, Republic of Korea.
| |
Collapse
|
70
|
Lopes F, Wang A, Smyth D, Reyes JL, Doering A, Schenck LP, Beck P, Waterhouse C, McKay DM. The Src kinase Fyn is protective in acute chemical-induced colitis and promotes recovery from disease. J Leukoc Biol 2015; 97:1089-99. [PMID: 25877924 DOI: 10.1189/jlb.3a0814-405rr] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2014] [Accepted: 03/07/2015] [Indexed: 01/08/2023] Open
Abstract
Despite progress in understanding enteric inflammation, current therapies, although effective in many patients with inflammatory bowel disease (IBD), have significant side-effects, and, in many patients, it is refractory to treatment. The Src kinase Fyn mediated IFN-γ-induced increased permeability in model epithelia, and so we hypothesized that inhibition of Fyn kinase would be anti-colitic. Mice [B6.129SF2/J wild-type (WT), Fyn KO, or chimeras] received 2.5% dextran sodium sulfate (DSS) or normal water for 10 d and were necropsied immediately or 3 d later. Gut permeability was assessed by FITC-dextran flux, colitis by macroscopic and histologic parameters, and immune cell status by cytokine production and CD4(+) T cell Foxp3 expression. Fyn KO mice consistently displayed significantly worse DSS-induced disease than WT, correlating with decreased IL-10 and increased IL-17 in splenocytes and the gut; Fyn KO mice failed to thrive after removal of the DSS water. Analysis of chimeric mice indicated that the increased sensitivity to DSS was due to the lack of Fyn kinase in hematopoietic, but not stromal, cells, in accordance with Fyn(+) T cell increases in WT mice exposed to DSS and Fyn KO mice having a reduced number of CD4(+)Foxp3(+) cells in baseline or colitic conditions and a reduced capacity to induce Foxp3 expression in vitro. Other experiments suggest that the colonic microbiota in Fyn KO mice is not preferentially colitogenic. Contrary to our expectation, the absence of Fyn kinase resulted in greater DSS-induced disease, and analysis of chimeric mice indicated that leukocyte Fyn kinase is beneficial in limiting colitis.
Collapse
Affiliation(s)
- Fernando Lopes
- *Gastrointestinal Research Group and Inflammation Research Network, Department of Physiology and Pharmacology, Department of Medicine, Department of Paediatrics, Calvin, Joan and Phoebe Snyder Institute for Chronic Diseases, Cumming School of Medicine, University of Calgary, Alberta, Canada
| | - Arthur Wang
- *Gastrointestinal Research Group and Inflammation Research Network, Department of Physiology and Pharmacology, Department of Medicine, Department of Paediatrics, Calvin, Joan and Phoebe Snyder Institute for Chronic Diseases, Cumming School of Medicine, University of Calgary, Alberta, Canada
| | - David Smyth
- *Gastrointestinal Research Group and Inflammation Research Network, Department of Physiology and Pharmacology, Department of Medicine, Department of Paediatrics, Calvin, Joan and Phoebe Snyder Institute for Chronic Diseases, Cumming School of Medicine, University of Calgary, Alberta, Canada
| | - Jose-Luis Reyes
- *Gastrointestinal Research Group and Inflammation Research Network, Department of Physiology and Pharmacology, Department of Medicine, Department of Paediatrics, Calvin, Joan and Phoebe Snyder Institute for Chronic Diseases, Cumming School of Medicine, University of Calgary, Alberta, Canada
| | - Axinia Doering
- *Gastrointestinal Research Group and Inflammation Research Network, Department of Physiology and Pharmacology, Department of Medicine, Department of Paediatrics, Calvin, Joan and Phoebe Snyder Institute for Chronic Diseases, Cumming School of Medicine, University of Calgary, Alberta, Canada
| | - L Patrick Schenck
- *Gastrointestinal Research Group and Inflammation Research Network, Department of Physiology and Pharmacology, Department of Medicine, Department of Paediatrics, Calvin, Joan and Phoebe Snyder Institute for Chronic Diseases, Cumming School of Medicine, University of Calgary, Alberta, Canada
| | - Paul Beck
- *Gastrointestinal Research Group and Inflammation Research Network, Department of Physiology and Pharmacology, Department of Medicine, Department of Paediatrics, Calvin, Joan and Phoebe Snyder Institute for Chronic Diseases, Cumming School of Medicine, University of Calgary, Alberta, Canada
| | - Christopher Waterhouse
- *Gastrointestinal Research Group and Inflammation Research Network, Department of Physiology and Pharmacology, Department of Medicine, Department of Paediatrics, Calvin, Joan and Phoebe Snyder Institute for Chronic Diseases, Cumming School of Medicine, University of Calgary, Alberta, Canada
| | - Derek M McKay
- *Gastrointestinal Research Group and Inflammation Research Network, Department of Physiology and Pharmacology, Department of Medicine, Department of Paediatrics, Calvin, Joan and Phoebe Snyder Institute for Chronic Diseases, Cumming School of Medicine, University of Calgary, Alberta, Canada
| |
Collapse
|
71
|
Kim JH, Kim AR, Kim HS, Kim HW, Park YH, You JS, Park YM, Her E, Kim HS, Kim YM, Choi WS. Rhamnus davurica leaf extract inhibits Fyn activation by antigen in mast cells for anti-allergic activity. BMC COMPLEMENTARY AND ALTERNATIVE MEDICINE 2015; 15:80. [PMID: 25887889 PMCID: PMC4379541 DOI: 10.1186/s12906-015-0607-6] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/03/2014] [Accepted: 03/12/2015] [Indexed: 01/06/2023]
Abstract
BACKGROUND Complementary and alternative herbal medicines are recently considered as a promising approach for treating various diseases. We screened approximately 100 plant extracts for anti-allergic activity. Rhamnus davurica leaf extract showed the most potent inhibitory effect on the activation of RBL-2H3 mast cells. Although Rhamnus davurica extract has been used to treat pruritus, dysuresia, and constipation as a traditional herbal medicine in some Asian countries, an anti-allergic effect of Rhamnus davurica has not yet been demonstrated. We aimed to investigate the effect and mechanism of the leaf extract of Rhamnus davurica (LERD) on mast cells in vitro and allergic responses in vivo. METHODS The effects of LERD on the activation of mast cells and mast cell-mediated passive cutaneous anaphylaxis (PCA) were measured in mice and two types of mast cells, mouse bone marrow-derived mast cells (BMMCs) and RBL-2H3 cells in vitro. A mechanistic study of its inhibitory effect was performed by using degranulation assay, reverse transcriptase-polymerase chain reaction, enzyme-linked immunosorbent assay, and western blotting analysis. RESULTS LERD reversibly suppressed antigen-stimulated degranulation in BMMCs and RBL-2H3 cells, and also inhibited mRNA expression and secretion of TNF-α and IL-4 in a dose-dependent manner. In a PCA animal model, LERD significantly inhibited antigen-induced allergic response and degranulation of ear tissue mast cells. As for the mechanism of action, LERD inhibited the activation of Syk, which is the pivotal signaling protein for mast cell activation by antigen. Furthermore, LERD also impeded the activations of well-known downstream proteins such as LAT, Akt and three MAP kinases (Erk, p38 and JNK). In an in vitro kinase assay, LERD suppressed the activation of Fyn in antigen-stimulated mast cells. CONCLUSION This study demonstrated for the first time that LERD has anti-allergic effects through inhibiting the Fyn/Syk pathway in mast cells. Therefore, this study provides scientific evidence for LERD to be used as an herbal medicine or health food for patients with allergic diseases.
Collapse
Affiliation(s)
- Ji Hyung Kim
- KU open Innovation Center, School of Medicine, Konkuk University, Chungju, 380-701, Korea.
| | - A-Ram Kim
- KU open Innovation Center, School of Medicine, Konkuk University, Chungju, 380-701, Korea.
| | - Hyuk Soon Kim
- KU open Innovation Center, School of Medicine, Konkuk University, Chungju, 380-701, Korea.
| | - Hyun Woo Kim
- KU open Innovation Center, School of Medicine, Konkuk University, Chungju, 380-701, Korea.
| | - Young Hwan Park
- KU open Innovation Center, School of Medicine, Konkuk University, Chungju, 380-701, Korea.
| | - Jueng Soo You
- KU open Innovation Center, School of Medicine, Konkuk University, Chungju, 380-701, Korea.
| | - Yeong Min Park
- KU open Innovation Center, School of Medicine, Konkuk University, Chungju, 380-701, Korea.
| | - Erk Her
- KU open Innovation Center, School of Medicine, Konkuk University, Chungju, 380-701, Korea.
| | - Hyung Sik Kim
- College of Pharmacy, Sungkyunkwan University, Suwon, 440-746, Korea.
| | - Young Mi Kim
- College of Pharmacy, Duksung Women's University, Seoul, 132-714, Korea.
| | - Wahn Soo Choi
- KU open Innovation Center, School of Medicine, Konkuk University, Chungju, 380-701, Korea.
| |
Collapse
|
72
|
Suzuki R, Scheffel J, Rivera J. New insights on the signaling and function of the high-affinity receptor for IgE. Curr Top Microbiol Immunol 2015; 388:63-90. [PMID: 25553795 DOI: 10.1007/978-3-319-13725-4_4] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Clustering of the high-affinity receptor for immunoglobulin E (FcεRI) through the interaction of receptor-bound immunoglobulin E (IgE) antibodies with their cognate antigen is required to couple IgE antibody production to cellular responses and physiological consequences. IgE-induced responses through FcεRI are well known to defend the host against certain infectious agents and to lead to unwanted allergic responses to normally innocuous substances. However, the cellular and/or physiological response of individuals that produce IgE antibodies may be markedly different and such antibodies (even to the same antigenic epitope) can differ in their antigen-binding affinity. How affinity variation in the interaction of FcεRI-bound IgE antibodies with antigen is interpreted into cellular responses and how the local environment may influence these responses is of interest. In this chapter, we focus on recent advances that begin to unravel how FcεRI distinguishes differences in the affinity of IgE-antigen interactions and how such discrimination along with surrounding environmental stimuli can shape the (patho) physiological response.
Collapse
Affiliation(s)
- Ryo Suzuki
- Molecular Immunology Section, Laboratory of Molecular Immunogenetics, National Institute of Arthritis and Musculoskeletal and Skin Diseases, National Institutes of Health, Bethesda, MD, 20892, USA
| | | | | |
Collapse
|
73
|
Huang RC, Garratt ES, Pan H, Wu Y, Davis EA, Barton SJ, Burdge GC, Godfrey KM, Holbrook JD, Lillycrop KA. Genome-wide methylation analysis identifies differentially methylated CpG loci associated with severe obesity in childhood. Epigenetics 2015; 10:995-1005. [PMID: 26646899 PMCID: PMC4844195 DOI: 10.1080/15592294.2015.1080411] [Citation(s) in RCA: 65] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2014] [Revised: 07/27/2015] [Accepted: 08/01/2015] [Indexed: 12/24/2022] Open
Abstract
Childhood obesity is a major public health issue. Here we investigated whether differential DNA methylation was associated with childhood obesity. We studied DNA methylation profiles in whole blood from 78 obese children (mean BMI Z-score: 2.6) and 71 age- and sex-matched controls (mean BMI Z-score: 0.1). DNA samples from obese and control groups were pooled and analyzed using the Infinium HumanMethylation450 BeadChip array. Comparison of the methylation profiles between obese and control subjects revealed 129 differentially methylated CpG (DMCpG) loci associated with 80 unique genes that had a greater than 10% difference in methylation (P-value < 0.05). The top pathways enriched among the DMCpGs included developmental processes, immune system regulation, regulation of cell signaling, and small GTPase-mediated signal transduction. The associations between the methylation of selected DMCpGs with childhood obesity were validated using sodium bisulfite pyrosequencing across loci within the FYN, PIWIL4, and TAOK3 genes in individual subjects. Three CpG loci within FYN were hypermethylated in obese individuals (all P < 0.01), while obesity was associated with lower methylation of CpG loci within PIWIL4 (P = 0.003) and TAOK3 (P = 0.001). After building logistic regression models, we determined that a 1% increase in methylation in TAOK3, multiplicatively decreased the odds of being obese by 0.91 (95% CI: 0.86 - 0.97), and an increase of 1% methylation in FYN CpG3, multiplicatively increased the odds of being obese by 1.03 (95% CI: 0.99 - 1.07). In conclusion, these findings provide evidence that childhood obesity is associated with specific DNA methylation changes in whole blood, which may have utility as biomarkers of obesity risk.
Collapse
Affiliation(s)
- R C Huang
- Telethon Institute for Child Health Research; University of Western Australia; Perth, Australia
| | - E S Garratt
- Academic Unit of Human Development and Health; Faculty of Medicine; University of Southampton; Southampton, UK
| | - H Pan
- Singapore Institute for Clinical Sciences (SICS); A*STAR; Brenner Center for Molecular Medicine; Singapore
- School of Computer Engineering; Nanyang Technological University (NTU); Singapore
| | - Y Wu
- Singapore Institute for Clinical Sciences (SICS); A*STAR; Brenner Center for Molecular Medicine; Singapore
| | - E A Davis
- Telethon Institute for Child Health Research; University of Western Australia; Perth, Australia
| | - S J Barton
- MRC Lifecourse Epidemiology Unit; University of Southampton; Southampton, UK
| | - G C Burdge
- Academic Unit of Human Development and Health; Faculty of Medicine; University of Southampton; Southampton, UK
| | - K M Godfrey
- MRC Lifecourse Epidemiology Unit; University of Southampton; Southampton, UK
- NIHR Southampton Biomedical Research Center; University of Southampton and University Hospital Southampton NHS Foundation Trust; Southampton, UK
| | - J D Holbrook
- Singapore Institute for Clinical Sciences (SICS); A*STAR; Brenner Center for Molecular Medicine; Singapore
- Yong Loo Lin School of Medicine; National University of Singapore (NUS); Singapore
| | - K A Lillycrop
- Academic Unit of Human Development and Health; Faculty of Medicine; University of Southampton; Southampton, UK
- Faculty of Natural and Environmental Sciences; University of Southampton; Southampton, UK
| |
Collapse
|
74
|
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]
|
75
|
Basic techniques to study FcεRI signaling in mast cells. Methods Mol Biol 2015; 1220:205-18. [PMID: 25388253 DOI: 10.1007/978-1-4939-1568-2_13] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
Mast cells are the crucial effector cells for allergic reactions. They are activated through the aggregation of the high-affinity IgE receptor (FcεRI) with allergen and allergen-specific IgE. Tyrosine phosphorylation of FcεRI subunits and various signaling proteins is an initial triggering event, leading to the activation of several signaling pathways in mast cells. Much has been learned from analysis of mast cells derived from gene-targeted mice. Therefore, in this chapter we will first describe how to generate mast cells from mouse bone marrow cells and how to correct the genetic defect by retroviral transduction. Then we will describe how to assess early activation events by measuring several protein-tyrosine kinases (PTKs) and serine/threonine kinases (PS/TKs) such as Akt (protein kinase B), protein kinase C (PKC), and JNK. As signal transduction is highly dependent on protein-protein interactions, we will describe experimental details of co-immunoprecipitation methods that are used to confirm such interactions.
Collapse
|
76
|
Abstract
For a time, mast cells were viewed as simple granulocytic effector cells that mediate allergic symptoms. More recent discoveries show that mast cells can also function as potent pro- and anti-inflammatory immune regulators in a plethora of human diseases. Much of the current knowledge about mast cell functions comes from studies on rodent models. The membrane receptors for antigen/IgE and growth factors are the core initiators of signaling cascades that trigger various mast cell responses. Yet, the regulation and multifunctionality of key receptor-proximal protein tyrosine phosphorylation events are still not well understood. The roles of the members of the protein tyrosine phosphatase superfamily of enzymes in regulating mast cell development, survival, and immune activation will be reviewed in this chapter.
Collapse
|
77
|
Register AC, Leonard SE, Maly DJ. SH2-catalytic domain linker heterogeneity influences allosteric coupling across the SFK family. Biochemistry 2014; 53:6910-23. [PMID: 25302671 PMCID: PMC4230323 DOI: 10.1021/bi5008194] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
![]()
Src-family
kinases (SFKs) make up a family of nine homologous multidomain
tyrosine kinases whose misregulation is responsible for human disease
(cancer, diabetes, inflammation, etc.). Despite overall sequence homology
and identical domain architecture, differences in SH3 and SH2 regulatory
domain accessibility and ability to allosterically autoinhibit the
ATP-binding site have been observed for the prototypical SFKs Src
and Hck. Biochemical and structural studies indicate that the SH2-catalytic
domain (SH2-CD) linker, the intramolecular binding epitope for SFK
SH3 domains, is responsible for allosterically coupling SH3 domain
engagement to autoinhibition of the ATP-binding site through the conformation
of the αC helix. As a relatively unconserved region between
SFK family members, SH2-CD linker sequence variability across the
SFK family is likely a source of nonredundant cellular functions between
individual SFKs via its effect on the availability of SH3 and SH2
domains for intermolecular interactions and post-translational modification.
Using a combination of SFKs engineered with enhanced or weakened regulatory
domain intramolecular interactions and conformation-selective inhibitors
that report αC helix conformation, this study explores how SH2-CD
sequence heterogeneity affects allosteric coupling across the SFK
family by examining Lyn, Fyn1, and Fyn2. Analyses of Fyn1 and Fyn2,
isoforms that are identical but for a 50-residue sequence spanning
the SH2-CD linker, demonstrate that SH2-CD linker sequence differences
can have profound effects on allosteric coupling between otherwise
identical kinases. Most notably, a dampened allosteric connection
between the SH3 domain and αC helix leads to greater autoinhibitory
phosphorylation by Csk, illustrating the complex effects of SH2-CD
linker sequence on cellular function.
Collapse
Affiliation(s)
- A C Register
- Department of Chemistry, University of Washington , Seattle, Washington 98195, United States
| | | | | |
Collapse
|
78
|
Kassas A, Moura IC, Yamashita Y, Scheffel J, Guérin-Marchand C, Blank U, Sims PJ, Wiedmer T, Monteiro RC, Rivera J, Charles N, Benhamou M. Regulation of the tyrosine phosphorylation of Phospholipid Scramblase 1 in mast cells that are stimulated through the high-affinity IgE receptor. PLoS One 2014; 9:e109800. [PMID: 25289695 PMCID: PMC4188579 DOI: 10.1371/journal.pone.0109800] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2014] [Accepted: 09/14/2014] [Indexed: 01/05/2023] Open
Abstract
Engagement of high-affinity immunoglobulin E receptors (FcεRI) activates two signaling pathways in mast cells. The Lyn pathway leads to recruitment of Syk and to calcium mobilization whereas the Fyn pathway leads to phosphatidylinositol 3-kinase recruitment. Mapping the connections between both pathways remains an important task to be completed. We previously reported that Phospholipid Scramblase 1 (PLSCR1) is phosphorylated on tyrosine after cross-linking FcεRI on RBL-2H3 rat mast cells, amplifies mast cell degranulation, and is associated with both Lyn and Syk tyrosine kinases. Here, analysis of the pathway leading to PLSCR1 tyrosine phosphorylation reveals that it depends on the FcRγ chain. FcεRI aggregation in Fyn-deficient mouse bone marrow-derived mast cells (BMMC) induced a more robust increase in FcεRI-dependent tyrosine phosphorylation of PLSCR1 compared to wild-type cells, whereas PLSCR1 phosphorylation was abolished in Lyn-deficient BMMC. Lyn association with PLSCR1 was not altered in Fyn-deficient BMMC. PLSCR1 phosphorylation was also dependent on the kinase Syk and significantly, but partially, dependent on detectable calcium mobilization. Thus, the Lyn/Syk/calcium axis promotes PLSCR1 phosphorylation in multiple ways. Conversely, the Fyn-dependent pathway negatively regulates it. This study reveals a complex regulation for PLSCR1 tyrosine phosphorylation in FcεRI-activated mast cells and that PLSCR1 sits at a crossroads between Lyn and Fyn pathways.
Collapse
Affiliation(s)
- Asma Kassas
- INSERM U1149, Faculté de Médecine Xavier Bichat, Paris, France
- University Paris-Diderot, Sorbonne Paris Cité, Laboratoire d’excellence INFLAMEX, DHU FIRE, Paris, France
| | - Ivan C. Moura
- INSERM U1149, Faculté de Médecine Xavier Bichat, Paris, France
- University Paris-Diderot, Sorbonne Paris Cité, Laboratoire d’excellence INFLAMEX, DHU FIRE, Paris, France
| | - Yumi Yamashita
- Laboratory of Molecular Immunogenetics, Molecular Immunology and Inflammation Branch, NIAMSD, NIH, Bethesda, Maryland, United States of America
| | - Jorg Scheffel
- Laboratory of Molecular Immunogenetics, Molecular Immunology and Inflammation Branch, NIAMSD, NIH, Bethesda, Maryland, United States of America
| | - Claudine Guérin-Marchand
- INSERM U1149, Faculté de Médecine Xavier Bichat, Paris, France
- University Paris-Diderot, Sorbonne Paris Cité, Laboratoire d’excellence INFLAMEX, DHU FIRE, Paris, France
| | - Ulrich Blank
- INSERM U1149, Faculté de Médecine Xavier Bichat, Paris, France
- University Paris-Diderot, Sorbonne Paris Cité, Laboratoire d’excellence INFLAMEX, DHU FIRE, Paris, France
| | - Peter J. Sims
- Department of Medicine, University of Rochester School of Medicine and Dentistry, Rochester, New York, United States of America
| | - Therese Wiedmer
- Department of Medicine, University of Rochester School of Medicine and Dentistry, Rochester, New York, United States of America
| | - Renato C. Monteiro
- INSERM U1149, Faculté de Médecine Xavier Bichat, Paris, France
- University Paris-Diderot, Sorbonne Paris Cité, Laboratoire d’excellence INFLAMEX, DHU FIRE, Paris, France
| | - Juan Rivera
- Laboratory of Molecular Immunogenetics, Molecular Immunology and Inflammation Branch, NIAMSD, NIH, Bethesda, Maryland, United States of America
| | - Nicolas Charles
- INSERM U1149, Faculté de Médecine Xavier Bichat, Paris, France
- University Paris-Diderot, Sorbonne Paris Cité, Laboratoire d’excellence INFLAMEX, DHU FIRE, Paris, France
- * E-mail: (NC); (MB)
| | - Marc Benhamou
- INSERM U1149, Faculté de Médecine Xavier Bichat, Paris, France
- University Paris-Diderot, Sorbonne Paris Cité, Laboratoire d’excellence INFLAMEX, DHU FIRE, Paris, France
- * E-mail: (NC); (MB)
| |
Collapse
|
79
|
Kimura Y, Chihara K, Honjoh C, Takeuchi K, Yamauchi S, Yoshiki H, Fujieda S, Sada K. Dectin-1-mediated signaling leads to characteristic gene expressions and cytokine secretion via spleen tyrosine kinase (Syk) in rat mast cells. J Biol Chem 2014; 289:31565-75. [PMID: 25246527 DOI: 10.1074/jbc.m114.581322] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
Dectin-1 recognizes β-glucan and plays important roles for the antifungal immunity through the activation of spleen tyrosine kinase (Syk) in dendritic cells or macrophages. Recently, expression of Dectin-1 was also identified in human and mouse mast cells, although its physiological roles were largely unknown. In this report, rat mast cell line RBL-2H3 was analyzed to investigate the molecular mechanism of Dectin-1-mediated activation and responses of mast cells. Treatment of cells with Dectin-1-specific agonist curdlan induced tyrosine phosphorylation of cellular proteins and the interaction of Dectin-1 with the Src homology 2 domain of Syk. These responses depended on tyrosine phosphorylation of the hemi-immunoreceptor tyrosine-based activation motif in the cytoplasmic tail of Dectin-1, whereas they were independent of the γ-subunit of high-affinity IgE receptor. DNA microarray and real-time PCR analyses showed that Dectin-1-mediated signaling stimulated gene expression of transcription factor Nfkbiz and inflammatory cytokines, such as monocyte chemoattractant protein-1, IL-3, IL-4, IL-13, and tumor necrosis factor (TNF)-α. The response was abrogated by pretreatment with Syk inhibitor R406. These results suggest that Syk is critical for Dectin-1-mediated activation of mast cells, although the signaling differs from that triggered by FcϵRI activation. In addition, these gene expressions induced by curdlan stimulation were specifically observed in mast cells, suggesting that Dectin-1-mediated signaling of mast cells offers new insight into the antifungal immunity.
Collapse
Affiliation(s)
- Yukihiro Kimura
- From the Division of Otorhinolaryngology Head and Neck Surgery, Department of Sensory and Locomotor Medicine, the Division of Genome Science and Microbiology, Department of Pathological Sciences, and
| | - Kazuyasu Chihara
- the Division of Genome Science and Microbiology, Department of Pathological Sciences, and the Organization for Life Science Advancement Programs, University of Fukui, Fukui 910-1193, Japan
| | - Chisato Honjoh
- the Division of Genome Science and Microbiology, Department of Pathological Sciences, and the Third Department of Internal Medicine, Faculty of Medical Sciences, and
| | - Kenji Takeuchi
- the Division of Genome Science and Microbiology, Department of Pathological Sciences, and the Organization for Life Science Advancement Programs, University of Fukui, Fukui 910-1193, Japan
| | - Shota Yamauchi
- the Division of Genome Science and Microbiology, Department of Pathological Sciences, and the Organization for Life Science Advancement Programs, University of Fukui, Fukui 910-1193, Japan
| | - Hatsumi Yoshiki
- the Division of Genome Science and Microbiology, Department of Pathological Sciences, and
| | - Shigeharu Fujieda
- From the Division of Otorhinolaryngology Head and Neck Surgery, Department of Sensory and Locomotor Medicine
| | - Kiyonao Sada
- the Division of Genome Science and Microbiology, Department of Pathological Sciences, and the Organization for Life Science Advancement Programs, University of Fukui, Fukui 910-1193, Japan
| |
Collapse
|
80
|
Transmembrane adaptor protein PAG/CBP is involved in both positive and negative regulation of mast cell signaling. Mol Cell Biol 2014; 34:4285-300. [PMID: 25246632 DOI: 10.1128/mcb.00983-14] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
The transmembrane adaptor protein PAG/CBP (here, PAG) is expressed in multiple cell types. Tyrosine-phosphorylated PAG serves as an anchor for C-terminal SRC kinase, an inhibitor of SRC-family kinases. The role of PAG as a negative regulator of immunoreceptor signaling has been examined in several model systems, but no functions in vivo have been determined. Here, we examined the activation of bone marrow-derived mast cells (BMMCs) with PAG knockout and PAG knockdown and the corresponding controls. Our data show that PAG-deficient BMMCs exhibit impaired antigen-induced degranulation, extracellular calcium uptake, tyrosine phosphorylation of several key signaling proteins (including the high-affinity IgE receptor subunits, spleen tyrosine kinase, and phospholipase C), production of several cytokines and chemokines, and chemotaxis. The enzymatic activities of the LYN and FYN kinases were increased in nonactivated cells, suggesting the involvement of a LYN- and/or a FYN-dependent negative regulatory loop. When BMMCs from PAG-knockout mice were activated via the KIT receptor, enhanced degranulation and tyrosine phosphorylation of the receptor were observed. In vivo experiments showed that PAG is a positive regulator of passive systemic anaphylaxis. The combined data indicate that PAG can function as both a positive and a negative regulator of mast cell signaling, depending upon the signaling pathway involved.
Collapse
|
81
|
Kovács M, Németh T, Jakus Z, Sitaru C, Simon E, Futosi K, Botz B, Helyes Z, Lowell CA, Mócsai A. The Src family kinases Hck, Fgr, and Lyn are critical for the generation of the in vivo inflammatory environment without a direct role in leukocyte recruitment. ACTA ACUST UNITED AC 2014; 211:1993-2011. [PMID: 25225462 PMCID: PMC4172222 DOI: 10.1084/jem.20132496] [Citation(s) in RCA: 97] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
Kovács et al. examine the role of the Src family kinases Hck, Fgr, and Lyn in immune cell–mediated inflammation. Using arthritis and skin inflammation models, the authors show that mice lacking hematopoietic Hck, Fgr, and Lyn are protected from these inflammatory diseases, showing loss of myeloid cell recruitment and lack of inflammatory mediator production. Unexpectedly, the three kinases are dispensable for the intrinsic migratory ability of myeloid cells. These finding may have clinical implications in rheumatic and skin diseases. Although Src family kinases participate in leukocyte function in vitro, such as integrin signal transduction, their role in inflammation in vivo is poorly understood. We show that Src family kinases play a critical role in myeloid cell–mediated in vivo inflammatory reactions. Mice lacking the Src family kinases Hck, Fgr, and Lyn in the hematopoietic compartment were completely protected from autoantibody-induced arthritis and skin blistering disease, as well as from the reverse passive Arthus reaction, with functional overlap between the three kinases. Though the overall phenotype resembled the leukocyte recruitment defect observed in β2 integrin–deficient (CD18−/−) mice, Hck−/−Fgr−/−Lyn−/− neutrophils and monocytes/macrophages had no cell-autonomous in vivo or in vitro migration defect. Instead, Src family kinases were required for the generation of the inflammatory environment in vivo and for the release of proinflammatory mediators from neutrophils and macrophages in vitro, likely due to their role in Fcγ receptor signal transduction. Our results suggest that infiltrating myeloid cells release proinflammatory chemokine, cytokine, and lipid mediators that attract further neutrophils and monocytes from the circulation in a CD18-dependent manner. Src family kinases are required for the generation of the inflammatory environment but not for the intrinsic migratory ability of myeloid cells.
Collapse
Affiliation(s)
- Miklós Kovács
- Department of Physiology, Semmelweis University School of Medicine, 1094 Budapest, Hungary MTA-SE "Lendület" Inflammation Physiology Research Group of the Hungarian Academy of Sciences and the Semmelweis University, and MTA-SE "Lendület" Lymphatic Physiology Research Group of the Hungarian Academy of Sciences and the Semmelweis University, 1094 Budapest, Hungary
| | - Tamás Németh
- Department of Physiology, Semmelweis University School of Medicine, 1094 Budapest, Hungary MTA-SE "Lendület" Inflammation Physiology Research Group of the Hungarian Academy of Sciences and the Semmelweis University, and MTA-SE "Lendület" Lymphatic Physiology Research Group of the Hungarian Academy of Sciences and the Semmelweis University, 1094 Budapest, Hungary
| | - Zoltán Jakus
- Department of Physiology, Semmelweis University School of Medicine, 1094 Budapest, Hungary MTA-SE "Lendület" Inflammation Physiology Research Group of the Hungarian Academy of Sciences and the Semmelweis University, and MTA-SE "Lendület" Lymphatic Physiology Research Group of the Hungarian Academy of Sciences and the Semmelweis University, 1094 Budapest, Hungary
| | - Cassian Sitaru
- Department of Dermatology, University Hospital Freiburg and BIOSS Centre for Biological Signalling Studies, 79104 Freiburg, Germany
| | - Edina Simon
- Department of Physiology, Semmelweis University School of Medicine, 1094 Budapest, Hungary MTA-SE "Lendület" Inflammation Physiology Research Group of the Hungarian Academy of Sciences and the Semmelweis University, and MTA-SE "Lendület" Lymphatic Physiology Research Group of the Hungarian Academy of Sciences and the Semmelweis University, 1094 Budapest, Hungary
| | - Krisztina Futosi
- Department of Physiology, Semmelweis University School of Medicine, 1094 Budapest, Hungary
| | - Bálint Botz
- Department of Pharmacology and Pharmacotherapy, Faculty of Medicine, and János Szentágothai Research Centre, University of Pécs, 7624 Pécs, Hungary Department of Pharmacology and Pharmacotherapy, Faculty of Medicine, and János Szentágothai Research Centre, University of Pécs, 7624 Pécs, Hungary
| | - Zsuzsanna Helyes
- Department of Pharmacology and Pharmacotherapy, Faculty of Medicine, and János Szentágothai Research Centre, University of Pécs, 7624 Pécs, Hungary Department of Pharmacology and Pharmacotherapy, Faculty of Medicine, and János Szentágothai Research Centre, University of Pécs, 7624 Pécs, Hungary
| | - Clifford A Lowell
- Department of Laboratory Medicine, University of California, San Francisco, San Francisco, CA 94143
| | - Attila Mócsai
- Department of Physiology, Semmelweis University School of Medicine, 1094 Budapest, Hungary MTA-SE "Lendület" Inflammation Physiology Research Group of the Hungarian Academy of Sciences and the Semmelweis University, and MTA-SE "Lendület" Lymphatic Physiology Research Group of the Hungarian Academy of Sciences and the Semmelweis University, 1094 Budapest, Hungary
| |
Collapse
|
82
|
Sibilano R, Frossi B, Pucillo CE. Mast cell activation: a complex interplay of positive and negative signaling pathways. Eur J Immunol 2014; 44:2558-66. [PMID: 25066089 DOI: 10.1002/eji.201444546] [Citation(s) in RCA: 109] [Impact Index Per Article: 10.9] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2014] [Revised: 07/08/2014] [Accepted: 07/23/2014] [Indexed: 11/07/2022]
Abstract
Mast cells regulate the immunological responses causing allergy and autoimmunity, and contribute to the tumor microenvironment through generation and secretion of a broad array of preformed, granule-stored and de novo synthesized bioactive compounds. The release and production of mast cell mediators is the result of a coordinated signaling machinery, followed by the FcεRI and FcγR antigen ligation. In this review, we present the latest understanding of FcεRI and FcγR signaling, required for the canonical mast cell activation during allergic responses and anaphylaxis. We then describe the cooperation between the signaling of FcR and other recently characterized membrane-bound receptors (i.e., IL-33R and thymic stromal lymphopoietin receptor) and their role in the chronic settings, where mast cell activation is crucial for the development and the sustainment of chronic diseases, such as asthma or airway inflammation. Finally, we report how the FcR activation could be used as a therapeutic approach to treat allergic and atopic diseases by mast cell inactivation. Understanding the magnitude and the complexity of mast cell signaling is necessary to identify the mechanisms underlying the potential effector and regulatory roles of mast cells in the biology and pathology of those disease settings in which mast cells are activated.
Collapse
|
83
|
Hwang SL, Lu Y, Li X, Kim YD, Cho YS, Jahng Y, Son JK, Lee YJ, Kang W, Taketomi Y, Murakami M, Moon TC, Chang HW. ERK1/2 antagonize AMPK-dependent regulation of FcεRI-mediated mast cell activation and anaphylaxis. J Allergy Clin Immunol 2014; 134:714-721.e7. [PMID: 24948367 DOI: 10.1016/j.jaci.2014.05.001] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2013] [Revised: 03/26/2014] [Accepted: 05/05/2014] [Indexed: 12/11/2022]
Abstract
BACKGROUND Extracellular signal-regulated kinases 1/2 (ERK1/2) make important contributions to allergic responses via their regulation of degranulation, eicosanoid production, and cytokine expression by mast cells, yet the mechanisms underlying their positive effects on FcεRI-dependent signaling are not fully understood. Recently, we reported that mast cell activation and anaphylaxis are negatively regulated by AMP-activated protein kinase (AMPK). However, little is known about the relationship between ERK1/2-mediated positive and the AMPK-mediated negative regulation of FcεRI signaling in mast cells. OBJECTIVE We investigated possible interactions between ERK1/2 and AMPK in the modulation of mast cell signaling and anaphylaxis. METHODS Wild-type or AMPKα2(-/-) mice, or bone marrow-derived mast cells obtained from these mice, were treated with either chemical agents or small interfering RNAs that modulated the activity or expression of ERK1/2 or AMPK to evaluate the functional interplay between ERK1/2 and AMPK in FcεRI-dependent signaling. RESULTS The ERK1/2 pathway inhibitor U0126 and the AMPK activator 5-aminoimidazole-4-carboxamide-1-β-4-ribofuranoside similarly inhibited FcεRI-mediated mast cell signals in vitro and anaphylaxis in vivo. ERK1/2-specific small interfering RNA also mimicked this effect on FcεRI signals. Moreover, AMPKα2 knockdown or deficiency led to increased FcεRI-mediated mast cell activation and anaphylaxis that were insensitive to U0126 or activator 5-aminoimidazole-4-carboxamide-1-β-4-ribofuranoside, suggesting that the suppression of FcεRI signals by the inhibition of the ERK1/2 pathway relies largely on AMPK activation. ERK1/2 controlled AMPK activity by regulating its subcellular translocation. CONCLUSIONS ERK1/2 ablated the AMPK-dependent negative regulatory axis, thereby activating FcεRI signals in mast cells.
Collapse
Affiliation(s)
| | - Yue Lu
- College of Pharmacy, Yeungnam University, Gyeongsan, Korea; School of Pharmacy, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Xian Li
- College of Pharmacy, Yeungnam University, Gyeongsan, Korea
| | - Yong Deuk Kim
- College of Pharmacy, Yeungnam University, Gyeongsan, Korea
| | - You Sook Cho
- Department of Allergy and Clinical Immunology, Asan Medical Center, College of Medicine, Ulsan University, Seoul, Korea
| | - Yurndong Jahng
- College of Pharmacy, Yeungnam University, Gyeongsan, Korea
| | - Jong-Keun Son
- College of Pharmacy, Yeungnam University, Gyeongsan, Korea
| | - Youn Ju Lee
- Department of Pharmacology, School of Medicine, Catholic University of Daegu, Daegu, Korea
| | - Wonku Kang
- College of Pharmacy, Chung-Ang University, Seoul, Korea
| | - Yoshitaka Taketomi
- Lipid Metabolism Project, Tokyo Metropolitan Institute of Medical Science, Tokyo, Japan
| | - Makoto Murakami
- Lipid Metabolism Project, Tokyo Metropolitan Institute of Medical Science, Tokyo, Japan
| | - Tae Chul Moon
- Pulmonary Research Group, Department of Medicine, University of Alberta, Edmonton, Alberta, Canada
| | | |
Collapse
|
84
|
Ogawa K, Tanaka Y, Uruno T, Duan X, Harada Y, Sanematsu F, Yamamura K, Terasawa M, Nishikimi A, Côté JF, Fukui Y. DOCK5 functions as a key signaling adaptor that links FcεRI signals to microtubule dynamics during mast cell degranulation. ACTA ACUST UNITED AC 2014; 211:1407-19. [PMID: 24913231 PMCID: PMC4076576 DOI: 10.1084/jem.20131926] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
Mast cells play a key role in the induction of anaphylaxis, a life-threatening IgE-dependent allergic reaction, by secreting chemical mediators that are stored in secretory granules. Degranulation of mast cells is triggered by aggregation of the high-affinity IgE receptor, FcεRI, and involves dynamic rearrangement of microtubules. Although much is known about proximal signals downstream of FcεRI, the distal signaling events controlling microtubule dynamics remain elusive. Here we report that DOCK5, an atypical guanine nucleotide exchange factor (GEF) for Rac, is essential for mast cell degranulation. As such, we found that DOCK5-deficient mice exhibit resistance to systemic and cutaneous anaphylaxis. The Rac GEF activity of DOCK5 is surprisingly not required for mast cell degranulation. Instead, DOCK5 associated with Nck2 and Akt to regulate microtubule dynamics through phosphorylation and inactivation of GSK3β. When DOCK5-Nck2-Akt interactions were disrupted, microtubule formation and degranulation response were severely impaired. Our results thus identify DOCK5 as a key signaling adaptor that orchestrates remodeling of the microtubule network essential for mast cell degranulation.
Collapse
Affiliation(s)
- Kana Ogawa
- Division of Immunogenetics, Department of Immunobiology and Neuroscience and Research Center for Advanced Immunology, Medical Institute of Bioregulation, Kyushu University, Fukuoka 812-8582, Japan Core Research for Evolutional Science and Technology (CREST), Japan Science and Technology Agency, Tokyo 102-0076, Japan
| | - Yoshihiko Tanaka
- Division of Immunogenetics, Department of Immunobiology and Neuroscience and Research Center for Advanced Immunology, Medical Institute of Bioregulation, Kyushu University, Fukuoka 812-8582, JapanDivision of Immunogenetics, Department of Immunobiology and Neuroscience and Research Center for Advanced Immunology, Medical Institute of Bioregulation, Kyushu University, Fukuoka 812-8582, Japan Core Research for Evolutional Science and Technology (CREST), Japan Science and Technology Agency, Tokyo 102-0076, Japan
| | - Takehito Uruno
- Division of Immunogenetics, Department of Immunobiology and Neuroscience and Research Center for Advanced Immunology, Medical Institute of Bioregulation, Kyushu University, Fukuoka 812-8582, Japan Core Research for Evolutional Science and Technology (CREST), Japan Science and Technology Agency, Tokyo 102-0076, Japan
| | - Xuefeng Duan
- Division of Immunogenetics, Department of Immunobiology and Neuroscience and Research Center for Advanced Immunology, Medical Institute of Bioregulation, Kyushu University, Fukuoka 812-8582, Japan Core Research for Evolutional Science and Technology (CREST), Japan Science and Technology Agency, Tokyo 102-0076, Japan
| | - Yosuke Harada
- Division of Immunogenetics, Department of Immunobiology and Neuroscience and Research Center for Advanced Immunology, Medical Institute of Bioregulation, Kyushu University, Fukuoka 812-8582, Japan Core Research for Evolutional Science and Technology (CREST), Japan Science and Technology Agency, Tokyo 102-0076, Japan
| | - Fumiyuki Sanematsu
- Division of Immunogenetics, Department of Immunobiology and Neuroscience and Research Center for Advanced Immunology, Medical Institute of Bioregulation, Kyushu University, Fukuoka 812-8582, JapanDivision of Immunogenetics, Department of Immunobiology and Neuroscience and Research Center for Advanced Immunology, Medical Institute of Bioregulation, Kyushu University, Fukuoka 812-8582, Japan Core Research for Evolutional Science and Technology (CREST), Japan Science and Technology Agency, Tokyo 102-0076, Japan
| | - Kazuhiko Yamamura
- Division of Immunogenetics, Department of Immunobiology and Neuroscience and Research Center for Advanced Immunology, Medical Institute of Bioregulation, Kyushu University, Fukuoka 812-8582, Japan Core Research for Evolutional Science and Technology (CREST), Japan Science and Technology Agency, Tokyo 102-0076, Japan
| | - Masao Terasawa
- Division of Immunogenetics, Department of Immunobiology and Neuroscience and Research Center for Advanced Immunology, Medical Institute of Bioregulation, Kyushu University, Fukuoka 812-8582, Japan Core Research for Evolutional Science and Technology (CREST), Japan Science and Technology Agency, Tokyo 102-0076, Japan
| | - Akihiko Nishikimi
- Division of Immunogenetics, Department of Immunobiology and Neuroscience and Research Center for Advanced Immunology, Medical Institute of Bioregulation, Kyushu University, Fukuoka 812-8582, JapanDivision of Immunogenetics, Department of Immunobiology and Neuroscience and Research Center for Advanced Immunology, Medical Institute of Bioregulation, Kyushu University, Fukuoka 812-8582, Japan Core Research for Evolutional Science and Technology (CREST), Japan Science and Technology Agency, Tokyo 102-0076, Japan
| | - Jean-François Côté
- Institut de Recherches Cliniques de Montréal, Université de Montréal, Montréal, Quebec H2W 1R7, Canada
| | - Yoshinori Fukui
- Division of Immunogenetics, Department of Immunobiology and Neuroscience and Research Center for Advanced Immunology, Medical Institute of Bioregulation, Kyushu University, Fukuoka 812-8582, JapanDivision of Immunogenetics, Department of Immunobiology and Neuroscience and Research Center for Advanced Immunology, Medical Institute of Bioregulation, Kyushu University, Fukuoka 812-8582, Japan Core Research for Evolutional Science and Technology (CREST), Japan Science and Technology Agency, Tokyo 102-0076, Japan
| |
Collapse
|
85
|
Baier A, Ndoh VNE, Lacy P, Eitzen G. Rac1 and Rac2 control distinct events during antigen-stimulated mast cell exocytosis. J Leukoc Biol 2014; 95:763-774. [PMID: 24399839 DOI: 10.1189/jlb.0513281] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2013] [Revised: 12/18/2013] [Accepted: 12/18/2013] [Indexed: 02/02/2023] Open
Abstract
The release of preformed mediators from immune cells is through a process described as exocytosis. In mast cells, exocytosis is regulated by several coordinated intracellular signaling pathways. Here, we investigated the role of the hematopoietic-specific Rho GTPase, Rac2, and the ubiquitously expressed Rac1, in controlling mast cell exocytosis. These two isoforms showed equivalent levels of expression in mouse BMMCs. Although Rac1 and Rac2 share 92% sequence identity, they were not functionally redundant, as Rac2-/- BMMCs were defective in exocytosis, even though Rac1 levels were unaffected. Antigen-stimulated WT mast cells underwent a series of morphological transitions: initial flattening, followed by actin-mediated peripheral membrane ruffling and calcium influx, which preceded exocytosis. Whereas membrane ruffling was unaffected in Rac2-/- BMMCs, calcium influx was decreased significantly. Calcium influx was studied further by examining SOCE. In Rac2-/- BMMCs, the activation of PLCγ1 and calcium release from intracellular stores occurred normally; however, activation of plasma membrane calcium channels was defective, shown by the lack of extracellular calcium influx and a reduction of YFP-STIM1 puncta at the plasma membrane. Additionally, we used the small molecule Rac inhibitor, EHT 1864, to target Rac signaling acutely in WT BMMCs. EHT 1864 blocked exocytosis and membrane ruffling completely in conjunction with exocytosis. Our findings suggest that antigen-stimulated membrane ruffling in mast cells is a Rac1-mediated process, as this persisted in the absence of Rac2. Therefore, we define distinct modes of Rac-regulated mast cell exocytosis: Rac2-mediated calcium influx and Rac1-mediated membrane ruffling.
Collapse
Affiliation(s)
| | - Vivian N E Ndoh
- Department of Cell Biology and
- Department of Medicine, University of Örebro, Örebro, Sweden
| | - Paige Lacy
- The Pulmonary Research Group, Department of Medicine, University of Alberta, Edmonton, Alberta, Canada; and
| | | |
Collapse
|
86
|
Chylek LA, Holowka DA, Baird BA, Hlavacek WS. An Interaction Library for the FcεRI Signaling Network. Front Immunol 2014; 5:172. [PMID: 24782869 PMCID: PMC3995055 DOI: 10.3389/fimmu.2014.00172] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2013] [Accepted: 03/31/2014] [Indexed: 12/20/2022] Open
Abstract
Antigen receptors play a central role in adaptive immune responses. Although the molecular networks associated with these receptors have been extensively studied, we currently lack a systems-level understanding of how combinations of non-covalent interactions and post-translational modifications are regulated during signaling to impact cellular decision-making. To fill this knowledge gap, it will be necessary to formalize and piece together information about individual molecular mechanisms to form large-scale computational models of signaling networks. To this end, we have developed an interaction library for signaling by the high-affinity IgE receptor, FcεRI. The library consists of executable rules for protein–protein and protein–lipid interactions. This library extends earlier models for FcεRI signaling and introduces new interactions that have not previously been considered in a model. Thus, this interaction library is a toolkit with which existing models can be expanded and from which new models can be built. As an example, we present models of branching pathways from the adaptor protein Lat, which influence production of the phospholipid PIP3 at the plasma membrane and the soluble second messenger IP3. We find that inclusion of a positive feedback loop gives rise to a bistable switch, which may ensure robust responses to stimulation above a threshold level. In addition, the library is visualized to facilitate understanding of network circuitry and identification of network motifs.
Collapse
Affiliation(s)
- Lily A Chylek
- Department of Chemistry and Chemical Biology, Cornell University , Ithaca, NY , USA ; Los Alamos National Laboratory, Theoretical Division, Center for Non-linear Studies , Los Alamos, NM , USA
| | - David A Holowka
- Department of Chemistry and Chemical Biology, Cornell University , Ithaca, NY , USA
| | - Barbara A Baird
- Department of Chemistry and Chemical Biology, Cornell University , Ithaca, NY , USA
| | - William S Hlavacek
- Los Alamos National Laboratory, Theoretical Division, Center for Non-linear Studies , Los Alamos, NM , USA
| |
Collapse
|
87
|
Lee YS, Hur S, Kim TY. Homoisoflavanone prevents mast cell activation and allergic responses by inhibition of Syk signaling pathway. Allergy 2014; 69:453-62. [PMID: 24446972 DOI: 10.1111/all.12356] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/02/2013] [Indexed: 11/30/2022]
Abstract
BACKGROUND Mast cells play important roles in allergic inflammatory responses because they produce leukotrienes (LTs), prostaglandins (PGs), and a variety of inflammatory cytokines. Thus, pharmacological interventions for allergies have focused on inhibiting mast cell activation. Homoisoflavanone (HIF), isolated from Cremastra appendiculata Makino, has anti-angiogenic activities; however, its effects on allergic reactions have not been determined. The aim of this study was to assess the inhibitory effects of HIF on mast cell activation, which is critical for anti-allergic reaction and the underlying mechanisms. METHODS Enzyme-linked immunosorbent assays, quantitative real-time PCR, western blot analyses, and degranulation assay were performed to measure pro-inflammatory and allergic mediators in PMA/A23187- or IgE/antigen-stimulated mouse bone marrow-derived mast cells (BMMCs), HMC-1, RBL-1, or human PBMC-derived mast cells treated with or without HIF. The anti-allergic effects of HIF were determined in mouse models using dinitrophenol-immunoglobulin E-induced passive cutaneous anaphylaxis (PCA) and compound 48/80-induced ear swelling. RESULTS Homoisoflavanone down-regulated PGD2 , LTB4 , and LTC4 production and inhibited the production of pro-inflammatory cytokines, such as interleukin-6 and tumor necrosis factor-α in PMA/A23187- or IgE/antigen-stimulated mast cells. The molecular mechanisms by which HIF caused these inhibitory effects were determined to be the inactivation of spleen tyrosine kinase (Syk) signaling and the concurrent suppression of cPLA2 . HIF inhibited IgE-mediated PCA and compound 48/80-induced ear swelling in mouse. CONCLUSIONS Homoisoflavanone inhibited mast cell activation through the suppression of Syk pathway together with the inhibition of cPLA2 . Thus, it might be a good candidate molecule for allergic diseases.
Collapse
Affiliation(s)
- Y. S. Lee
- Department of Dermatology; College of Medicine; The Catholic University of Korea; Seoul South Korea
| | - S. Hur
- Department of Dermatology; College of Medicine; The Catholic University of Korea; Seoul South Korea
| | - T.-Y. Kim
- Department of Dermatology; College of Medicine; The Catholic University of Korea; Seoul South Korea
| |
Collapse
|
88
|
Suzuki R, Leach S, Liu W, Ralston E, Scheffel J, Zhang W, Lowell CA, Rivera J. Molecular editing of cellular responses by the high-affinity receptor for IgE. Science 2014; 343:1021-5. [PMID: 24505132 PMCID: PMC4188507 DOI: 10.1126/science.1246976] [Citation(s) in RCA: 70] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Cellular responses elicited by cell surface receptors differ according to stimulus strength. We investigated how the high-affinity receptor for immunoglobulin E (IgE) modulates the response of mast cells to a high- or low-affinity stimulus. Both high- and low-affinity stimuli elicited similar receptor phosphorylation; however, differences were observed in receptor cluster size, mobility, distribution, and the cells' effector responses. Low-affinity stimulation increased receptor association with the Src family kinase Fgr and shifted signals from the adapter LAT1 to the related adapter LAT2. LAT1-dependent calcium signals required for mast cell degranulation were dampened, but the role of LAT2 in chemokine production was enhanced, altering immune cell recruitment at the site of inflammation. These findings uncover how receptor discrimination of stimulus strength can be interpreted as distinct in vivo outcomes.
Collapse
Affiliation(s)
- Ryo Suzuki
- Laboratory of Molecular Immunogenetics, National Institute of Arthritis and Musculoskeletal and Skin Diseases, Bethesda, MD 20892, USA
| | | | | | | | | | | | | | | |
Collapse
|
89
|
Affiliation(s)
- Marc Daëron
- Institut Pasteur, 75015 Paris, France, and Centre d'Immunologie de Marseille-Luminy, 13009 Marseille, France
| |
Collapse
|
90
|
Abstract
Mast cells are major players in allergic responses. IgE-dependent activation through Fc epsilon RI leads to degranulation and cytokine production, both of which require Gab2. To clarify how the signals diverge at Gab2, we established Gab2 knock-in mice that express Gab2 mutated at either the PI-3K- or SHP-2-binding sites. Examination of these mutants showed that both binding sites were required for the degranulation and anaphylaxis response, but not for cytokine production or contact hypersensitivity. Furthermore, the PI-3K- but not the SHP-2-binding site was important for granule translocation during degranulation. We also identified a small GTPase, ARF1, as the downstream target of PI-3K that regulates granule translocation. Fc epsilon RI-stimulation induced ARF1 activation, and this response was dependent on Fyn and the PI-3K-binding site of Gab2. ARF1 activity was required for the Fc epsilon RI-mediated granule translocation. These results indicate that Fyn/Gab2/PI-3K/ARF1-mediated signaling is specifically involved in granule translocation and the anaphylaxis response. In this review, I discussed how Gab2 controls biological events especially for mast cell degranulation and allergy response.
Collapse
Affiliation(s)
- Keigo Nishida
- Laboratory for Cytokine Signaling, RIKEN Research Center for Allergy and Immunology, Yokohama 230-0045, Japan
| |
Collapse
|
91
|
Garcia-Faroldi G, Melo FR, Bruemmer D, Conneely OM, Pejler G, Lundequist A. Nuclear receptor 4a3 (nr4a3) regulates murine mast cell responses and granule content. PLoS One 2014; 9:e89311. [PMID: 24586680 PMCID: PMC3930735 DOI: 10.1371/journal.pone.0089311] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2013] [Accepted: 01/22/2014] [Indexed: 11/18/2022] Open
Abstract
Nuclear receptor 4a3 (Nr4a3) is a transcription factor implicated in various settings such as vascular biology and inflammation. We have recently shown that mast cells dramatically upregulate Nuclear receptor 4a3 upon activation, and here we investigated the functional impact of Nuclear receptor 4a3 on mast cell responses. We show that Nuclear receptor 4a3 is involved in the regulation of cytokine/chemokine secretion in mast cells following activation via the high affinity IgE receptor. Moreover, Nuclear receptor 4a3 negatively affects the transcript and protein levels of mast cell tryptase as well as the mast cell's responsiveness to allergen. Together, these findings identify Nuclear receptor 4a3 as a novel regulator of mast cell function.
Collapse
Affiliation(s)
- Gianni Garcia-Faroldi
- Swedish University of Agricultural Sciences, Department of Anatomy, Physiology and Biochemistry, BMC, Uppsala, Sweden
| | - Fabio R. Melo
- Swedish University of Agricultural Sciences, Department of Anatomy, Physiology and Biochemistry, BMC, Uppsala, Sweden
| | - Dennis Bruemmer
- Saha Cardiovascular Research Center, University of Kentucky College of Medicine, Wethington, Kentucky, United States of America
| | - Orla M. Conneely
- Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, Texas, United States of America
| | - Gunnar Pejler
- Swedish University of Agricultural Sciences, Department of Anatomy, Physiology and Biochemistry, BMC, Uppsala, Sweden
| | - Anders Lundequist
- Swedish University of Agricultural Sciences, Department of Anatomy, Physiology and Biochemistry, BMC, Uppsala, Sweden
- * E-mail:
| |
Collapse
|
92
|
Reber LL, Frossard N. Targeting mast cells in inflammatory diseases. Pharmacol Ther 2014; 142:416-35. [PMID: 24486828 DOI: 10.1016/j.pharmthera.2014.01.004] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2014] [Accepted: 01/24/2014] [Indexed: 12/24/2022]
Abstract
Although mast cells have long been known to play a critical role in anaphylaxis and other allergic diseases, they also participate in some innate immune responses and may even have some protective functions. Data from the study of mast cell-deficient mice have facilitated our understanding of some of the molecular mechanisms driving mast cell functions during both innate and adaptive immune responses. This review presents an overview of the biology of mast cells and their potential involvement in various inflammatory diseases. We then discuss some of the current pharmacological approaches used to target mast cells and their products in several diseases associated with mast cell activation.
Collapse
Affiliation(s)
- Laurent L Reber
- Department of Pathology, Stanford University School of Medicine, Stanford, CA, USA.
| | - Nelly Frossard
- Laboratoire d'Innovation Thérapeutique, UMR 7200 CNRS-Université de Strasbourg, Faculté de Pharmacie, France
| |
Collapse
|
93
|
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.
Collapse
|
94
|
Bojjireddy N, Sinha RK, Subrahmanyam G. Fyn kinase regulates type II PtdIns 4-kinases in RBL 2H3 cells. Mol Cell Biochem 2013; 387:63-70. [PMID: 24173619 DOI: 10.1007/s11010-013-1871-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2013] [Accepted: 10/18/2013] [Indexed: 10/26/2022]
Abstract
Type II phosphatidylinositol 4-kinases are implicated in FcεRI-mediated signaling cascades leading to release of inflammatory molecules. Cross-linking of FcεRI on RBL 2H3 cells results in protein tyrosine phosphorylation and activation of type II PtdIns 4-kinase activity. Protein tyrosine kinase(s) that phosphorylate type II PtdIns 4-kinase(s) in RBL 2H3 cells remains elusive and is being addressed in this manuscript. Anti-Fyn kinase antibodies co-immunoprecipitated type II PtdIns 4-kinase activity from FcεRI cross-linked RBL 2H3 cells. In reciprocal assays, His-tagged types II PtdIns 4-kinases were shown to pull down Fyn kinase. Further, anti-Fyn immunoprecipitates were shown to phosphorylate type II PtdIns 4-kinase α and β in in vitro assays. Pull down studies with GST-Fyn-SH2 and GST-Fyn-SH3 domains showed that type II PtdIns 4-kinases associate with Fyn-SH2 domain. Knockdown of Fyn kinase in RBL 2H3 cells abrogated activation of type II PtdIns 4-kinase activity in response to FcεRI cross-linking and type II PtdIns 4-kinase activity in anti-phosphotyrosine immunoprecipitates. Knockdown of Fyn kinase was also strongly correlated with a reduction in β-hexosaminidase release in response to FcεRI cross-linking. These results suggest that type II PtdIns 4-kinases act downstream of Fyn kinase in FcεRI signaling cascades and are regulated by Fyn kinase.
Collapse
Affiliation(s)
- Naveen Bojjireddy
- Department of Biosciences and Bioengineering, Wadhwani Research Centre for Biosciences and Bioengineering, Indian Institute of Technology Bombay, Powai, Mumbai, 400076, India,
| | | | | |
Collapse
|
95
|
Mycoepoxydiene inhibits antigen-stimulated activation of mast cells and suppresses IgE-mediated anaphylaxis in mice. Int Immunopharmacol 2013; 17:336-41. [PMID: 23859869 DOI: 10.1016/j.intimp.2013.06.029] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2013] [Revised: 06/17/2013] [Accepted: 06/24/2013] [Indexed: 12/24/2022]
|
96
|
Streptochlorin suppresses allergic dermatitis and mast cell activation via regulation of Lyn/Fyn and Syk signaling pathways in cellular and mouse models. PLoS One 2013; 8:e74194. [PMID: 24086321 PMCID: PMC3785495 DOI: 10.1371/journal.pone.0074194] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2013] [Accepted: 07/27/2013] [Indexed: 02/01/2023] Open
Abstract
Allergic diseases are chronic inflammatory conditions with specific immune and inflammatory mechanisms. Scientific interest in understanding the mechanisms and discovering novel agents for the prevention and treatment of allergic disease is increasing. Streptochlorin, a small compound derived from marine actinomycete possesses anti-angiogenic and anti-tumor activities. However, the anti-allergic effects and underlying mechanisms remain to be elucidated. In the present study, we investigated the effect of streptochlorin on allergic responses in vitro and in vivo. Streptochlorin inhibited degranulation and production of tumor necrosis factor-α and IL-4 by antigen-stimulated mast cells. Streptochlorin also inhibited the phosphorylation of Akt and the mitogen-activated protein kinases (MAPKs), including p38, ERK, and JNK. Further, streptochlorin reduced the phosphorylation of Syk in RBL-2H3 cells and inhibited the activity of Lyn and Fyn. Furthermore, administration of streptochlorin suppressed the allergic reactions in both passive cutaneous anaphylaxis reaction and 2, 4-dinitrofluorobenzene (DNFB)-induced allergic dermatitis in mice model. Considering the data obtained, we report for the first time that streptochlorin possess anti-allergic properties. The underlying mechanism of streptochlorin in exhibiting potent anti-allergic activity might be through the inhibition of the Lyn/Fyn and Syk signaling pathways.
Collapse
|
97
|
Kim DK, Kim HS, Kim AR, Jang GH, Kim HW, Park YH, Kim B, Park YM, Beaven MA, Kim YM, Choi WS. The scaffold protein prohibitin is required for antigen-stimulated signaling in mast cells. Sci Signal 2013; 6:ra80. [PMID: 24023254 DOI: 10.1126/scisignal.2004098] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
The protein prohibitin (PHB) is implicated in diverse cellular processes, including cell signaling, transcriptional control, and mitochondrial function. We found that PHB was abundant in the intracellular granules of mast cells, which are critical for allergic responses to antigens. Thus, we investigated whether PHB played a role in signaling mediated by the high-affinity receptor for antigen-bound immunoglobulin E (IgE), FcεRI. PHB-specific small interfering RNAs (siRNAs) inhibited antigen-mediated signaling, degranulation, and cytokine secretion by mast cells in vitro. Knockdown of PHB inhibited the antigen-dependent association of the tyrosine kinase Syk with FcεRI and inhibited the activation of Syk. Fractionation studies revealed that PHB translocated from intracellular granules to plasma membrane lipid rafts in response to antigen, and knockdown of PHB suppressed the movement of FcεRIγ and Syk into lipid rafts. Tyrosine phosphorylation of PHB by Lyn was observed early after exposure to antigen, and point mutations in PHB indicated that Tyr(114) and Tyr(259) were required for the recruitment of Syk to FcεRIγ and mast cell activation. In mice, PHB-specific siRNAs inhibited antigen-initiated mast cell degranulation, passive cutaneous anaphylaxis, and passive systemic anaphylaxis. Together, these results suggest that PHB is essential for FcεRI-mediated mast cell activation and allergic responses in vivo, raising the possibility that PHB might serve as a therapeutic target for the treatment of allergic diseases.
Collapse
Affiliation(s)
- Do Kyun Kim
- 1Department of Immunology and Physiology and Functional Genomics Institute, College of Medicine, Konkuk University, Chungju 380-701, Korea
| | | | | | | | | | | | | | | | | | | | | |
Collapse
|
98
|
Lu Y, Piao D, Zhang H, Li X, Chao GH, Park SJ, Chang YC, Kim CH, Murakami M, Jung SH, Choi JH, Son JK, Chang HW. Saucerneol F inhibits tumor necrosis factor-α and IL-6 production by suppressing Fyn-mediated pathways in FcεRI-mediated mast cells. Food Chem Toxicol 2013; 59:696-702. [DOI: 10.1016/j.fct.2013.06.056] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2013] [Revised: 06/17/2013] [Accepted: 06/28/2013] [Indexed: 10/26/2022]
|
99
|
Hwang SL, Li X, Lu Y, Jin Y, Jeong YT, Kim YD, Lee IK, Taketomi Y, Sato H, Cho YS, Murakami M, Chang HW. AMP-activated protein kinase negatively regulates FcεRI-mediated mast cell signaling and anaphylaxis in mice. J Allergy Clin Immunol 2013; 132:729-736.e12. [DOI: 10.1016/j.jaci.2013.02.018] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2012] [Revised: 12/27/2012] [Accepted: 02/14/2013] [Indexed: 10/27/2022]
|
100
|
Kraft S, Jouvin MH, Kulkarni N, Kissing S, Morgan ES, Dvorak AM, Schröder B, Saftig P, Kinet JP. The tetraspanin CD63 is required for efficient IgE-mediated mast cell degranulation and anaphylaxis. THE JOURNAL OF IMMUNOLOGY 2013; 191:2871-8. [PMID: 23945142 DOI: 10.4049/jimmunol.1202323] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Mast cell (MC) activation through the high-affinity IgE receptor FcεRI leads to the release of mediators involved in immediate-type allergic reactions. Although Abs against the tetraspanins CD63 and CD81 inhibit FcεRI-induced MC degranulation, the intrinsic role of these molecules in FcεRI-induced MC activation is unknown. In MCs, CD63 is expressed at the cell surface and in lysosomes (particularly secretory lysosomes that contain allergic mediators). In this study, we investigated the role of CD63 in MC using a CD63 knockout mouse model. CD63-deficiency did not affect in vivo MC numbers and tissue distribution. Bone marrow-derived MC developed normally in the absence of CD63 protein. However, CD63-deficient bone marrow-derived MC showed a significant decrease in FcεRI-mediated degranulation, but not PMA/ionomycin-induced degranulation, as shown by β-hexosaminidase release assays. The secretion of TNF-α, which is both released from granules and synthesized de novo upon MC activation, was also decreased. IL-6 secretion and production of the lipid mediator leukotriene C₄ were unaffected. There were no ultrastructural differences in granule content and morphology, late endosomal/lysosomal marker expression, FcεRI-induced global tyrosine phosphorylation, and Akt phosphorylation. Finally, local reconstitution in genetically MC-deficient Kit(w/w-v) mice was unaffected by the absence of CD63. However, the sites reconstituted with CD63-deficient MC developed significantly attenuated cutaneous anaphylactic reactions. These findings demonstrate that the absence of CD63 results in a significant decrease of MC degranulation, which translates into a reduction of acute allergic reactions in vivo, thus identifying CD63 as an important component of allergic inflammation.
Collapse
Affiliation(s)
- Stefan Kraft
- Laboratory of Allergy and Immunology, Department of Pathology, Beth Israel Deaconess Medical Center, Boston, MA 02215, USA
| | | | | | | | | | | | | | | | | |
Collapse
|