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Suzuki R. [Mast Cell-Neutrophil Communication Regulates Allergic Diseases]. YAKUGAKU ZASSHI 2024; 144:483-488. [PMID: 38692921 DOI: 10.1248/yakushi.23-00154-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/03/2024]
Abstract
Allergic diseases (e.g., food allergies) are a growing problem, with increasing numbers of individuals experiencing them worldwide. Congruently, the adverse reactions (e.g., anaphylaxis) associated with the administration of vaccines against emerging infectious diseases such as coronavirus disease 2019 (COVID-19) have become a familiar problem. Allergic diseases, which have a wide variety of symptoms, are difficult to prevent or cure; treatment is currently limited to therapeutic drugs or allergen immunotherapy. Therefore, elucidating new allergic regulatory factors that control the allergic (i.e., mast cell) responses is important. While investigating the regulatory mechanisms of the wide range of allergic responses of mast cells, we found that the affinity of allergens to immunoglobin E (IgE) regulates allergic inflammation through the differences in the secretory responses of mast cells and the types and interactions of the cells infiltrating the tissues. Here, we present our recent findings regarding the affinity of allergens to IgE in regulating allergic inflammation, heterogeneous secretory granules inducing diverse secretory responses, and mast cells interacting with neutrophils, thereby regulating the various allergic responses.
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Affiliation(s)
- Ryo Suzuki
- Faculty of Pharmaceutical Sciences, Institute of Medical, Pharmaceutical and Health Sciences, Kanazawa University
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2
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Nishad R, Betancourt-Solis M, Dey H, Heidelberger R, McNew JA. Regulation of Syntaxin3B-Mediated Membrane Fusion by T14, Munc18, and Complexin. Biomolecules 2023; 13:1463. [PMID: 37892145 PMCID: PMC10604575 DOI: 10.3390/biom13101463] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2023] [Revised: 09/22/2023] [Accepted: 09/26/2023] [Indexed: 10/29/2023] Open
Abstract
Retinal neurons that form ribbon-style synapses operate over a wide dynamic range, continuously relaying visual information to their downstream targets. The remarkable signaling abilities of these neurons are supported by specialized presynaptic machinery, one component of which is syntaxin3B. Syntaxin3B is an essential t-SNARE protein of photoreceptors and bipolar cells that is required for neurotransmitter release. It has a light-regulated phosphorylation site in its N-terminal domain at T14 that has been proposed to modulate membrane fusion. However, a direct test of the latter has been lacking. Using a well-controlled in vitro fusion assay, we found that a phosphomimetic T14 syntaxin3B mutation leads to a small but significant enhancement of SNARE-mediated membrane fusion following the formation of the t-SNARE complex. While the addition of Munc18a had only a minimal effect on membrane fusion mediated by SNARE complexes containing wild-type syntaxin3B, a more significant enhancement was observed in the presence of Munc18a when the SNARE complexes contained a syntaxin3B T14 phosphomimetic mutant. Finally, we showed that the retinal-specific complexins (Cpx III and Cpx IV) inhibited membrane fusion mediated by syntaxin3B-containing SNARE complexes in a dose-dependent manner. Collectively, our results establish that membrane fusion mediated by syntaxin3B-containing SNARE complexes is regulated by the T14 residue of syntaxin3B, Munc18a, and Cpxs III and IV.
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Affiliation(s)
- Rajkishor Nishad
- Department of BioSciences, Rice University, 6500 Main Street, MS 601, Houston, TX 77005, USA;
| | - Miguel Betancourt-Solis
- Department of BioSciences, Rice University, 6500 Main Street, MS 601, Houston, TX 77005, USA;
- Lonza Biologics, 14905 Kirby Dr, Houston, TX 77047, USA
| | - Himani Dey
- Department of Neurobiology and Anatomy, McGovern Medical School, The University of Texas Health Science Center, Houston (UTHealth Houston), 6431 Fannin Street, Houston, TX 77030, USA;
| | - Ruth Heidelberger
- Department of Neurobiology and Anatomy, McGovern Medical School, The University of Texas Health Science Center, Houston (UTHealth Houston), 6431 Fannin Street, Houston, TX 77030, USA;
| | - James A. McNew
- Department of BioSciences, Rice University, 6500 Main Street, MS 601, Houston, TX 77005, USA;
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3
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Adhikari P, Ayo TE, Vines JC, Sugita S, Xu H. Exocytic machineries differentially control mediator release from allergen-triggered RBL-2H3 cells. Inflamm Res 2023; 72:639-649. [PMID: 36725743 DOI: 10.1007/s00011-023-01698-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2022] [Revised: 01/06/2023] [Accepted: 01/23/2023] [Indexed: 02/03/2023] Open
Abstract
BACKGROUND Mast cells utilize SNAREs (soluble-N-ethyl-maleimide sensitive factor attachment protein receptors) and SM (Sec1/Munc18) proteins to secrete/exocytose a variety of proinflammatory mediators. However, whether a common SNARE-SM machinery is responsible remains unclear. METHODS Four vesicle/granule-anchored SNAREs (VAMP2, VAMP3, VAMP7, and VAMP8) and two Munc18 homologs (Munc18a and Munc18b) were systematically knocked down or knocked out in RBL-2H3 mast cells and antigen-induced release of β-hexosaminidase, histamine, serotonin, and TNF was examined. Phenotypes were validated by rescue experiments. Immunofluorescence studies were performed to determine the subcellular distribution of key players. RESULTS The reduction of VAMP8 expression inhibited the exocytosis of β-hexosaminidase, histamine, and serotonin but not TNF. Unexpectedly, however, confocal microscopy revealed substantial co-localization between VAMP8 and TNF, and between TNF and serotonin. Meanwhile, the depletion of other VAMPs, including knockout of VAMP3, had no impact on the release of any of the mediators examined. On the other hand, TNF exocytosis was diminished specifically in stable Munc18bknockdown cells, in a fashion that was rescued by exogenous, RNAi-resistant Munc18b. In line with this, TNF was co-localized with Munc18b (47%) to a much greater extent than with Munc18a (13%). CONCLUSION Distinct exocytic pathways exist in mast cells for the release of different mediators.
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Affiliation(s)
- Pratikshya Adhikari
- Center for Molecular and Cellular Biosciences, School of Biological, Environmental, and Earth Sciences, University of Southern Mississippi, Hattiesburg, MS, 39406, USA
| | - Tolulope E Ayo
- Center for Molecular and Cellular Biosciences, School of Biological, Environmental, and Earth Sciences, University of Southern Mississippi, Hattiesburg, MS, 39406, USA
| | - John C Vines
- Center for Molecular and Cellular Biosciences, School of Biological, Environmental, and Earth Sciences, University of Southern Mississippi, Hattiesburg, MS, 39406, USA
| | - Shuzo Sugita
- Division of Fundamental Neurobiology, University Health Network, Toronto, ON, M5T 2S8, Canada
- Department of Physiology, Faculty of Medicine, University of Toronto, Toronto, ON, M5S 1A8, Canada
| | - Hao Xu
- Center for Molecular and Cellular Biosciences, School of Biological, Environmental, and Earth Sciences, University of Southern Mississippi, Hattiesburg, MS, 39406, USA.
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4
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Bratti M, Vibhushan S, Longé C, Koumantou D, Ménasché G, Benhamou M, Varin-Blank N, Blank U, Saveanu L, Ben Mkaddem S. Insulin-regulated aminopeptidase contributes to setting the intensity of FcR-mediated inflammation. Front Immunol 2022; 13:1029759. [PMID: 36389775 PMCID: PMC9647545 DOI: 10.3389/fimmu.2022.1029759] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2022] [Accepted: 10/12/2022] [Indexed: 11/25/2022] Open
Abstract
The function of intracellular trafficking in immune-complex triggered inflammation remains poorly understood. Here, we investigated the role of Insulin-Regulated Amino Peptidase (IRAP)-positive endosomal compartments in Fc receptor (FcR)-induced inflammation. Less severe FcγR-triggered arthritis, active systemic anaphylaxis and FcεRI-triggered passive systemic anaphylaxis were observed in IRAP-deficient versus wild-type mice. In mast cells FcεRI stimulation induced rapid plasma membrane recruitment of IRAP-positive endosomes. IRAP-deficient cells exhibited reduced secretory responses, calcium signaling and activating SykY519/520 phosphorylation albeit receptor tyrosine phosphorylation on β and γ subunits was not different. By contrast, in the absence of IRAP, SHP1-inactivating phosphorylation on Ser591 that controls Syk activity was decreased. Ex-vivo cell profiling after FcγR-triggered anaphylaxis confirmed decreased phosphorylation of both SykY519/520 and SHP-1S591 in IRAP-deficient neutrophils and monocytes. Thus, IRAP-positive endosomal compartments, in promoting inhibition of SHP-1 during FcR signaling, control the extent of phosphorylation events at the plasma membrane and contribute to setting the intensity of immune-complex triggered inflammatory diseases.
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Affiliation(s)
- Manuela Bratti
- Université Paris Cité, Centre de Recherche sur l’Inflammation, Institut National de la Santé et de la Recherche Médicale (INSERM) Unité Mixte de Recherche (UMR)1149, Centre National de la Recherche Scientifique (CNRS) Equipe Mixte de Recherche(EMR)-8252, Faculté de Médecine site Bichat, Paris, France
- Université Paris Cité, Laboratoire d’Excellence INFLAMEX, Paris, France
| | - Shamila Vibhushan
- Université Paris Cité, Centre de Recherche sur l’Inflammation, Institut National de la Santé et de la Recherche Médicale (INSERM) Unité Mixte de Recherche (UMR)1149, Centre National de la Recherche Scientifique (CNRS) Equipe Mixte de Recherche(EMR)-8252, Faculté de Médecine site Bichat, Paris, France
- Université Paris Cité, Laboratoire d’Excellence INFLAMEX, Paris, France
| | - Cyril Longé
- Université Paris Cité, Imagine Institute, Laboratory of Molecular basis of altered immune homeostasis, Institut National de la Santé et de la Recherche Médicale (INSERM) Unité Mixte de Recherche (UMR)1163, Paris, France
| | - Despoina Koumantou
- Université Paris Cité, Centre de Recherche sur l’Inflammation, Institut National de la Santé et de la Recherche Médicale (INSERM) Unité Mixte de Recherche (UMR)1149, Centre National de la Recherche Scientifique (CNRS) Equipe Mixte de Recherche(EMR)-8252, Faculté de Médecine site Bichat, Paris, France
- Université Paris Cité, Laboratoire d’Excellence INFLAMEX, Paris, France
| | - Gaël Ménasché
- Université Paris Cité, Imagine Institute, Laboratory of Molecular basis of altered immune homeostasis, Institut National de la Santé et de la Recherche Médicale (INSERM) Unité Mixte de Recherche (UMR)1163, Paris, France
| | - Marc Benhamou
- Université Paris Cité, Centre de Recherche sur l’Inflammation, Institut National de la Santé et de la Recherche Médicale (INSERM) Unité Mixte de Recherche (UMR)1149, Centre National de la Recherche Scientifique (CNRS) Equipe Mixte de Recherche(EMR)-8252, Faculté de Médecine site Bichat, Paris, France
- Université Paris Cité, Laboratoire d’Excellence INFLAMEX, Paris, France
| | - Nadine Varin-Blank
- Institut National de la Santé et de la Recherche Médicale (INSERM) U978, Université Paris 13 Sorbonne Paris Nord, Unité de Formation et de Recherche (UFR) Santé Médecine et Biologie Humaine (SMBH), Bobigny, France
| | - Ulrich Blank
- Université Paris Cité, Centre de Recherche sur l’Inflammation, Institut National de la Santé et de la Recherche Médicale (INSERM) Unité Mixte de Recherche (UMR)1149, Centre National de la Recherche Scientifique (CNRS) Equipe Mixte de Recherche(EMR)-8252, Faculté de Médecine site Bichat, Paris, France
- Université Paris Cité, Laboratoire d’Excellence INFLAMEX, Paris, France
- *Correspondence: Ulrich Blank,
| | - Loredana Saveanu
- Université Paris Cité, Centre de Recherche sur l’Inflammation, Institut National de la Santé et de la Recherche Médicale (INSERM) Unité Mixte de Recherche (UMR)1149, Centre National de la Recherche Scientifique (CNRS) Equipe Mixte de Recherche(EMR)-8252, Faculté de Médecine site Bichat, Paris, France
- Université Paris Cité, Laboratoire d’Excellence INFLAMEX, Paris, France
| | - Sanae Ben Mkaddem
- Institut National de la Santé et de la Recherche Médicale (INSERM) U978, Université Paris 13 Sorbonne Paris Nord, Unité de Formation et de Recherche (UFR) Santé Médecine et Biologie Humaine (SMBH), Bobigny, France
- Institute of biological Sciences, Mohammed VI Polytechnic University (UM6P), Ben-Guerir, Morocco
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Cui L, Li H, Xi Y, Hu Q, Liu H, Fan J, Xiang Y, Zhang X, Shui W, Lai Y. Vesicle trafficking and vesicle fusion: mechanisms, biological functions, and their implications for potential disease therapy. MOLECULAR BIOMEDICINE 2022; 3:29. [PMID: 36129576 PMCID: PMC9492833 DOI: 10.1186/s43556-022-00090-3] [Citation(s) in RCA: 24] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2022] [Accepted: 07/12/2022] [Indexed: 11/10/2022] Open
Abstract
Intracellular vesicle trafficking is the fundamental process to maintain the homeostasis of membrane-enclosed organelles in eukaryotic cells. These organelles transport cargo from the donor membrane to the target membrane through the cargo containing vesicles. Vesicle trafficking pathway includes vesicle formation from the donor membrane, vesicle transport, and vesicle fusion with the target membrane. Coat protein mediated vesicle formation is a delicate membrane budding process for cargo molecules selection and package into vesicle carriers. Vesicle transport is a dynamic and specific process for the cargo containing vesicles translocation from the donor membrane to the target membrane. This process requires a group of conserved proteins such as Rab GTPases, motor adaptors, and motor proteins to ensure vesicle transport along cytoskeletal track. Soluble N-ethyl-maleimide-sensitive factor (NSF) attachment protein receptors (SNARE)-mediated vesicle fusion is the final process for vesicle unloading the cargo molecules at the target membrane. To ensure vesicle fusion occurring at a defined position and time pattern in eukaryotic cell, multiple fusogenic proteins, such as synaptotagmin (Syt), complexin (Cpx), Munc13, Munc18 and other tethering factors, cooperate together to precisely regulate the process of vesicle fusion. Dysfunctions of the fusogenic proteins in SNARE-mediated vesicle fusion are closely related to many diseases. Recent studies have suggested that stimulated membrane fusion can be manipulated pharmacologically via disruption the interface between the SNARE complex and Ca2+ sensor protein. Here, we summarize recent insights into the molecular mechanisms of vesicle trafficking, and implications for the development of new therapeutics based on the manipulation of vesicle fusion.
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Rabea AA, Rashed L, Hassan R. Regenerative capacity of bone marrow stem cells on aged albino rat's parotid excretory duct. Arch Oral Biol 2022; 141:105470. [PMID: 35728514 DOI: 10.1016/j.archoralbio.2022.105470] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2022] [Revised: 05/27/2022] [Accepted: 06/02/2022] [Indexed: 11/24/2022]
Abstract
OBJECTIVE To appraise structural features of parotid excretory duct during senility and probable effect of bone marrow-mesenchymal stem cells (BM-MSCs). DESIGN A total of 14 healthy male albino rats were used. Seven adult rats (24-34-week-old) represented the control group (Group I). Seven senile rats (72-80-week-old) were utilized in which the left parotid gland served as "Old" (Group II) and were injected by 0.2 ml phosphate buffered saline; the right side represented "Old treated" (Group III) and got local injection of 1-1.5 million allogeneic BM-MSCs. One month later, glands were dissected and assessed structurally, ultra-structurally and statistically. RESULT Histologically, Group I showed normal duct histology. In Group II duct lining lost its pseudostratification which was recovered in Group III. PCNA immunolocalization showed moderate reactivity in Group I, negative to mild reaction in Group II, and strong reaction in some of Group III cells. Ultra-structural features of Group I were ordinary in which basal cell had a large flat nucleus, and dark and light cells showed electron-dense cytoplasm and electron-lucent cytoplasm respectively. Tuft cell displayed long microvilli. Mucous droplets filled goblet cell. Group II revealed an apparent reduction in cells size, organelles and absence of tuft cell. In Group III all cell types were detected and they recovered their organelles, cell and nucleus shape. The highest mean area% of PCNA immunoreactivity was in Group I followed by Group III then Group II. CONCLUSIONS Aging has a deteriorating effect on structure and ultra-structure of parotid gland excretory duct that could be amended by BM-MSCs.
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Affiliation(s)
- Amany A Rabea
- Associate Professor of Oral Biology, Faculty of Oral and Dental Medicine, Future University in Egypt, Cairo, Egypt.
| | - Laila Rashed
- Professor of Biochemistry, Faculty of Medicine, Cairo University, Cairo, Egypt
| | - Rabab Hassan
- Associate Professor of Oral Biology, Faculty of Dentistry, Ain Shams University, Cairo, Egypt
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Longé C, Bratti M, Kurowska M, Vibhushan S, David P, Desmeure V, Huang JD, Fischer A, de Saint Basile G, Sepulveda FE, Blank U, Ménasché G. Rab44 regulates murine mast cell-driven anaphylaxis through kinesin-1-dependent secretory granule translocation. J Allergy Clin Immunol 2022; 150:676-689. [PMID: 35469841 DOI: 10.1016/j.jaci.2022.04.009] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2021] [Revised: 03/15/2022] [Accepted: 04/08/2022] [Indexed: 11/16/2022]
Abstract
BACKGROUND Mast cells (MCs) are key effectors of the allergic response. Following the cross-linking of IgE receptors (FcεRIs), they release crucial inflammatory mediators through degranulation. Although degranulation depends critically on secretory granule (SG) trafficking towards the plasma membrane, the molecular machinery underlying this transport has not been fully characterized. OBJECTIVE Here, we analyzed the function of Rab44, a large atypical Rab GTPase highly expressed in MC, in MC degranulation process. METHODS Murine KO mouse models (KORab44 and DKOKif5b/Rab44) were used to perform passive cutaneous anaphylaxis (PCA) experiments and analyze granule translocation in derived bone-marrow-derived MCs (BMMCs) during degranulation. RESULTS We demonstrate that mice lacking Rab44 (KORab44) in their BMMCs are impaired in their ability to translocate and degranulate SGs at the plasma membrane upon FcεRI stimulation. Accordingly, KORab44 mice were less sensitive to IgE-mediated passive cutaneous anaphylaxis in vivo. A lack of Rab44 did not impair early FcεRI-stimulated signaling pathways, microtubule reorganization, lipid mediator or cytokine secretion. Mechanistically, Rab44 appears to interact with and function as part of the previously described kinesin-1-dependent transport pathway. CONCLUSIONS Our results highlight a novel role of Rab44 as a regulator of SG transport during degranulation and anaphylaxis acting through the kinesin-1-dependent microtubule transport machinery. Rab44 can thus be considered as a potential target for modulating MC degranulation and inhibiting IgE-mediated allergic reactions.
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Affiliation(s)
- Cyril Longé
- Université Paris Cité, Imagine Institute, Laboratory of Molecular basis of altered immune homeostasis, INSERM UMR1163, F-75015 Paris France
| | - Manuela Bratti
- Université Paris Cité, Centre de Recherche sur l'Inflammation, INSERM UMR1149, CNRS EMR8252, Faculté de Médecine site Bichat, Paris, France; Laboratoire d'Excellence Inflamex, F-75018, Paris, France
| | - Mathieu Kurowska
- Université Paris Cité, Imagine Institute, Laboratory of Molecular basis of altered immune homeostasis, INSERM UMR1163, F-75015 Paris France
| | - Shamila Vibhushan
- Université Paris Cité, Centre de Recherche sur l'Inflammation, INSERM UMR1149, CNRS EMR8252, Faculté de Médecine site Bichat, Paris, France; Laboratoire d'Excellence Inflamex, F-75018, Paris, France
| | - Pierre David
- Transgenesis Facility, Laboratoire d'Expérimentation Animale et Transgénèse (LEAT), Imagine Institute, Structure Fédérative de Recherche Necker INSERM US24/CNRS UMS3633, F-75015, Paris, France
| | - Valère Desmeure
- Université Paris Cité, Imagine Institute, Laboratory of Molecular basis of altered immune homeostasis, INSERM UMR1163, F-75015 Paris France
| | - Jian-Dong Huang
- School of Biomedical Sciences, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong
| | - Alain Fischer
- Université Paris Cité, Imagine Institute, Laboratory of Molecular basis of altered immune homeostasis, INSERM UMR1163, F-75015 Paris France; Immunology and Pediatric Hematology Department, Necker Children's Hospital, AP-HP, F-75015 Paris, France; Collège de France, F-75005 Paris, France
| | - Geneviève de Saint Basile
- Université Paris Cité, Imagine Institute, Laboratory of Molecular basis of altered immune homeostasis, INSERM UMR1163, F-75015 Paris France; Centre d'Etude des Déficits Immunitaires, AP-HP, Hôpital Necker-Enfants Malades, F-75015, Paris, France
| | - Fernando E Sepulveda
- Université Paris Cité, Imagine Institute, Laboratory of Molecular basis of altered immune homeostasis, INSERM UMR1163, F-75015 Paris France; Centre National de la Recherche Scientifique, F-75015, Paris. France
| | - Ulrich Blank
- Université Paris Cité, Centre de Recherche sur l'Inflammation, INSERM UMR1149, CNRS EMR8252, Faculté de Médecine site Bichat, Paris, France; Laboratoire d'Excellence Inflamex, F-75018, Paris, France
| | - Gaël Ménasché
- Université Paris Cité, Imagine Institute, Laboratory of Molecular basis of altered immune homeostasis, INSERM UMR1163, F-75015 Paris France
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Blank U, Huang H, Kawakami T. The high affinity IgE receptor: a signaling update. Curr Opin Immunol 2021; 72:51-58. [PMID: 33838574 DOI: 10.1016/j.coi.2021.03.015] [Citation(s) in RCA: 35] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2021] [Accepted: 03/22/2021] [Indexed: 01/01/2023]
Abstract
Here we update receptor proximal and distant signaling events of the mast cell high affinity IgE receptor (FcεRI) launching immediate type I hypersensitivity and an inflammatory cytokine-chemokine cascade. Different physiologic antigen concentrations, their affinity, and valency for the IgE ligand produce distinct intracellular signaling events with different outcomes. Investigating mast cell degranulation has revealed a complex molecular machinery that relays proximal signaling to cytoskeletal reorganization, granule transport and membrane fusion. Several new phosphorylation- and calcium-responsive effectors have been described. FcεRI signaling also promotes de novo gene transcription. Recent progress has identified enhancers at genes that are upregulated in mast cells after stimulation through FcεRI using next generation sequencing methods. Enhancers at genes that respond to antigenic stimulation in human mast cells revealed Ca2+-dependency. Stimulation-responsive super enhancers in mouse mast cells have also been identified. Mast cell lineage-determining transcription factor GATA2 primes these enhancers to respond to antigenic stimulation.
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Affiliation(s)
- Ulrich Blank
- Université de Paris, Centre de Recherche sur l'Inflammation, INSERM UMR1149, CNRS ERL8252, Faculté de Médecine site Bichat, Paris, France; Laboratoire d'Excellence Inflamex, Paris, France.
| | - Hua Huang
- Department of Immunology and Genomic Medicine, National Jewish Health, Denver, CO 80206, USA; Department of Immunology and Microbiology, University of Colorado Anschutz Medical Campus, Aurora, CO 80045, USA
| | - Toshiaki Kawakami
- Laboratory of Allergic Diseases, Center for Autoimmunity and Inflammation, La Jolla Institute for Immunology, La Jolla, CA 92037, USA; Department of Dermatology, School of Medicine, University of California San Diego, La Jolla, CA 92093, USA
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9
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Ménasché G, Longé C, Bratti M, Blank U. Cytoskeletal Transport, Reorganization, and Fusion Regulation in Mast Cell-Stimulus Secretion Coupling. Front Cell Dev Biol 2021; 9:652077. [PMID: 33796537 PMCID: PMC8007931 DOI: 10.3389/fcell.2021.652077] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2021] [Accepted: 02/03/2021] [Indexed: 01/16/2023] Open
Abstract
Mast cells are well known for their role in allergies and many chronic inflammatory diseases. They release upon stimulation, e.g., via the IgE receptor, numerous bioactive compounds from cytoplasmic secretory granules. The regulation of granule secretion and its interaction with the cytoskeleton and transport mechanisms has only recently begun to be understood. These studies have provided new insight into the interaction between the secretory machinery and cytoskeletal elements in the regulation of the degranulation process. They suggest a tight coupling of these two systems, implying a series of specific signaling effectors and adaptor molecules. Here we review recent knowledge describing the signaling events regulating cytoskeletal reorganization and secretory granule transport machinery in conjunction with the membrane fusion machinery that occur during mast cell degranulation. The new insight into MC biology offers novel strategies to treat human allergic and inflammatory diseases targeting the late steps that affect harmful release from granular stores leaving regulatory cytokine secretion intact.
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Affiliation(s)
- Gaël Ménasché
- Laboratory of Molecular Basis of Altered Immune Homeostasis, Imagine Institute, INSERM UMR 1163, Université de Paris, Paris, France
| | - Cyril Longé
- Laboratory of Molecular Basis of Altered Immune Homeostasis, Imagine Institute, INSERM UMR 1163, Université de Paris, Paris, France
| | - Manuela Bratti
- Centre de Recherche sur l'Inflammation, INSERM UMR 1149, CNRS ERL8252, Faculté de Médecine site Bichat, Université de Paris, Paris, France.,Laboratoire d'Excellence Inflamex, Université de Paris, Paris, France
| | - Ulrich Blank
- Centre de Recherche sur l'Inflammation, INSERM UMR 1149, CNRS ERL8252, Faculté de Médecine site Bichat, Université de Paris, Paris, France.,Laboratoire d'Excellence Inflamex, Université de Paris, Paris, France
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Ayo TE, Adhikari P, Sugita S, Xu H. TNF Production in Activated RBL-2H3 Cells Requires Munc13-4. Inflammation 2021; 43:744-751. [PMID: 31897916 DOI: 10.1007/s10753-019-01161-4] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
Mast cell activation triggers intricate signaling pathways that promote the expression and/or release of a wide range of mediators including tumor necrosis factor (TNF; also known as TNFα). In this study, we investigated the connection between TNF secretion and TNF production, exploiting RBL-2H3 cells (a tumor analog of mucosal mast cells) that are depleted of Munc13-4, a crucial component of the mast cell exocytic machinery. We showed that antigen/IgE elicited robust TNF production in RBL-2H3 cells, but not in Munc13-4 knockout cells. The production defect was corrected when Munc13-4 was reintroduced into the knockout cell line, suggesting that the phenotype was not caused by any secondary effect derived from the knockout approach. Furthermore, pre-incubation of RBL-2H3 cells with R-7050, an antagonist of TNF receptor-dependent signaling, was shown to block TNF production without inhibiting TNF release. These observations provide fresh evidence for a robust feed-back loop to boost TNF production in activated mast cells.
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Affiliation(s)
- Tolulope E Ayo
- Department of Cell and Molecular Biology, School of Biological, Environmental, and Earth Sciences, University of Southern Mississippi, Hattiesburg, MS, 39406, USA
| | - Pratikshya Adhikari
- Department of Cell and Molecular Biology, School of Biological, Environmental, and Earth Sciences, University of Southern Mississippi, Hattiesburg, MS, 39406, USA
| | - Shuzo Sugita
- Division of Fundamental Neurobiology, University Health Network, Toronto, ON, M5T 2S8, Canada.,Department of Physiology, Faculty of Medicine, University of Toronto, Toronto, ON, M5S 1A8, Canada
| | - Hao Xu
- Department of Cell and Molecular Biology, School of Biological, Environmental, and Earth Sciences, University of Southern Mississippi, Hattiesburg, MS, 39406, USA.
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Campbell JR, Li H, Wang Y, Kozhemyakin M, Hunt AJ, Liu X, Janz R, Heidelberger R. Phosphorylation of the Retinal Ribbon Synapse Specific t-SNARE Protein Syntaxin3B Is Regulated by Light via a Ca 2 +-Dependent Pathway. Front Cell Neurosci 2020; 14:587072. [PMID: 33192329 PMCID: PMC7606922 DOI: 10.3389/fncel.2020.587072] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2020] [Accepted: 09/11/2020] [Indexed: 12/27/2022] Open
Abstract
Neurotransmitter release at retinal ribbon-style synapses utilizes a specialized t-SNARE protein called syntaxin3B (STX3B). In contrast to other syntaxins, STX3 proteins can be phosphorylated in vitro at T14 by Ca2+/calmodulin-dependent protein kinase II (CaMKII). This modification has the potential to modulate SNARE complex formation required for neurotransmitter release in an activity-dependent manner. To determine the extent to which T14 phosphorylation occurs in vivo in the mammalian retina and characterize the pathway responsible for the in vivo phosphorylation of T14, we utilized quantitative immunofluorescence to measure the levels of STX3 and STX3 phosphorylated at T14 (pSTX3) in the synaptic terminals of mouse retinal photoreceptors and rod bipolar cells (RBCs). Results demonstrate that STX3B phosphorylation at T14 is light-regulated and dependent upon the elevation of intraterminal Ca2+. In rod photoreceptor terminals, the ratio of pSTX3 to STX3 was significantly higher in dark-adapted mice, when rods are active, than in light-exposed mice. By contrast, in RBC terminals, the ratio of pSTX3 to STX3 was higher in light-exposed mice, when these terminals are active, than in dark-adapted mice. These results were recapitulated in the isolated eyecup preparation, but only when Ca2+ was included in the external medium. In the absence of external Ca2+, pSTX3 levels remained low regardless of light/dark exposure. Using the isolated RBC preparation, we next showed that elevation of intraterminal Ca2+ alone was sufficient to increase STX3 phosphorylation at T14. Furthermore, both the non-specific kinase inhibitor staurosporine and the selective CaMKII inhibitor AIP inhibited the Ca2+-dependent increase in the pSTX3/STX3 ratio in isolated RBC terminals, while in parallel experiments, AIP suppressed RBC depolarization-evoked exocytosis, measured using membrane capacitance measurements. Our data support a novel, illumination-regulated modulation of retinal ribbon-style synapse function in which activity-dependent Ca2+ entry drives the phosphorylation of STX3B at T14 by CaMKII, which in turn, modulates the ability to form SNARE complexes required for exocytosis.
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Affiliation(s)
- Joseph R Campbell
- Department of Neurobiology and Anatomy, University of Texas Health Science Center at Houston, Houston, TX, United States
| | - Hongyan Li
- Department of Neurobiology and Anatomy, University of Texas Health Science Center at Houston, Houston, TX, United States
| | - Yanzhao Wang
- Department of Neurobiology and Anatomy, University of Texas Health Science Center at Houston, Houston, TX, United States
| | - Maxim Kozhemyakin
- Department of Neurobiology and Anatomy, University of Texas Health Science Center at Houston, Houston, TX, United States
| | - Albert J Hunt
- Department of Neurobiology and Anatomy, University of Texas Health Science Center at Houston, Houston, TX, United States
| | - Xiaoqin Liu
- Department of Neurobiology and Anatomy, University of Texas Health Science Center at Houston, Houston, TX, United States
| | - Roger Janz
- Department of Neurobiology and Anatomy, University of Texas Health Science Center at Houston, Houston, TX, United States.,MD Anderson Cancer Center UTHealth Graduate School of Biomedical Sciences, Houston, TX, United States
| | - Ruth Heidelberger
- Department of Neurobiology and Anatomy, University of Texas Health Science Center at Houston, Houston, TX, United States.,MD Anderson Cancer Center UTHealth Graduate School of Biomedical Sciences, Houston, TX, United States
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12
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Tang BL. SNAREs and developmental disorders. J Cell Physiol 2020; 236:2482-2504. [PMID: 32959907 DOI: 10.1002/jcp.30067] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2020] [Revised: 08/20/2020] [Accepted: 09/09/2020] [Indexed: 12/12/2022]
Abstract
Members of the soluble N-ethylmaleimide-sensitive factor attachment protein receptor (SNARE) family mediate membrane fusion processes associated with vesicular trafficking and autophagy. SNAREs mediate core membrane fusion processes essential for all cells, but some SNAREs serve cell/tissue type-specific exocytic/endocytic functions, and are therefore critical for various aspects of embryonic development. Mutations or variants of their encoding genes could give rise to developmental disorders, such as those affecting the nervous system and immune system in humans. Mutations to components in the canonical synaptic vesicle fusion SNARE complex (VAMP2, STX1A/B, and SNAP25) and a key regulator of SNARE complex formation MUNC18-1, produce variant phenotypes of autism, intellectual disability, movement disorders, and epilepsy. STX11 and MUNC18-2 mutations underlie 2 subtypes of familial hemophagocytic lymphohistiocytosis. STX3 mutations contribute to variant microvillus inclusion disease. Chromosomal microdeletions involving STX16 play a role in pseudohypoparathyroidism type IB associated with abnormal imprinting of the GNAS complex locus. In this short review, I discuss these and other SNARE gene mutations and variants that are known to be associated with a variety developmental disorders, with a focus on their underlying cellular and molecular pathological basis deciphered through disease modeling. Possible pathogenic potentials of other SNAREs whose variants could be disease predisposing are also speculated upon.
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Affiliation(s)
- Bor L Tang
- Department of Biochemistry, Yong Loo Lin School of Medicine, National University of Singapore, Singapore
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13
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Madjene LC, Danelli L, Dahdah A, Vibhushan S, Bex-Coudrat J, Pacreau E, Vaugier C, Claver J, Rolas L, Pons M, Madera-Salcedo IK, Beghdadi W, El Ghoneimi A, Benhamou M, Launay P, Abrink M, Pejler G, Moura IC, Charles N, Daugas E, Perianin A, Blank U. Mast cell chymase protects against acute ischemic kidney injury by limiting neutrophil hyperactivation and recruitment. Kidney Int 2019; 97:516-527. [PMID: 31866111 DOI: 10.1016/j.kint.2019.08.037] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2018] [Revised: 08/20/2019] [Accepted: 08/29/2019] [Indexed: 12/22/2022]
Abstract
Here we investigated the role of murine mast cell protease 4 (MCPT4), the functional counterpart of human mast cell chymase, in an experimental model of renal ischemia reperfusion injury, a major cause of acute kidney injury. MCPT4-deficient mice had worsened kidney function compared to wildtype mice. MCPT4 absence exacerbated pathologic neutrophil infiltration in the kidney and increased kidney myeloperoxidase expression, cell death and necrosis. In kidneys with ischemia reperfusion injury, when compared to wildtype mice, MCPT4-deficient mice showed increased surface expression of adhesion molecules necessary for leukocyte extravasation including neutrophil CD162 and endothelial cell CD54. In vitro, human chymase mediated the cleavage of neutrophil expressed CD162 and also CD54, P- and E-Selectin expressed on human glomerular endothelial cells. MCPT4 also dampened systemic neutrophil activation after renal ischemia reperfusion injury as neutrophils expressed more CD11b integrin and produced more reactive oxygen species in MCPT4-deficient mice. Accordingly, after renal injury, neutrophil migration to an inflammatory site distal from the kidney was increased in MCPT4-deficient versus wildtype mice. Thus, contrary to the described overall aggravating role of mast cells, one granule-released mediator, the MCPT4 chymase, exhibits a potent anti-inflammatory function in renal ischemia reperfusion injury by controlling neutrophil extravasation and activation thereby limiting associated damage.
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Affiliation(s)
- Lydia Celia Madjene
- Center of Research on Inflammation, Inserm UMRS-1149, Paris, France; Center of Research on Inflammation, CNRS ERL 8252, Paris, France; Center of Research on Inflammation, Université Paris Diderot, Sorbonne Paris Cite, Laboratoire d'excellence INFLAMEX, Paris, France
| | - Luca Danelli
- Center of Research on Inflammation, Inserm UMRS-1149, Paris, France; Center of Research on Inflammation, CNRS ERL 8252, Paris, France; Center of Research on Inflammation, Université Paris Diderot, Sorbonne Paris Cite, Laboratoire d'excellence INFLAMEX, Paris, France
| | - Albert Dahdah
- Center of Research on Inflammation, Inserm UMRS-1149, Paris, France; Center of Research on Inflammation, CNRS ERL 8252, Paris, France; Center of Research on Inflammation, Université Paris Diderot, Sorbonne Paris Cite, Laboratoire d'excellence INFLAMEX, Paris, France
| | - Shamila Vibhushan
- Center of Research on Inflammation, Inserm UMRS-1149, Paris, France; Center of Research on Inflammation, CNRS ERL 8252, Paris, France; Center of Research on Inflammation, Université Paris Diderot, Sorbonne Paris Cite, Laboratoire d'excellence INFLAMEX, Paris, France
| | - Julie Bex-Coudrat
- Center of Research on Inflammation, Inserm UMRS-1149, Paris, France; Center of Research on Inflammation, CNRS ERL 8252, Paris, France; Center of Research on Inflammation, Université Paris Diderot, Sorbonne Paris Cite, Laboratoire d'excellence INFLAMEX, Paris, France
| | - Emeline Pacreau
- Center of Research on Inflammation, Inserm UMRS-1149, Paris, France; Center of Research on Inflammation, CNRS ERL 8252, Paris, France; Center of Research on Inflammation, Université Paris Diderot, Sorbonne Paris Cite, Laboratoire d'excellence INFLAMEX, Paris, France
| | - Celine Vaugier
- INSERM UMR 1163, Laboratory of Cellular and Molecular Mechanisms of Hematological Disorders and Therapeutic Implications, Paris, France; Imagine Institute, Paris Descartes-Sorbonne Paris Cité University, Laboratory of Excellence GR-Ex, Paris, France; CNRS ERL 8254, Laboratory of Cellular and Molecular Mechanisms of Hematological Disorders and Therapeutic Implications, Paris, France
| | - Julien Claver
- Center of Research on Inflammation, Inserm UMRS-1149, Paris, France; Center of Research on Inflammation, CNRS ERL 8252, Paris, France; Center of Research on Inflammation, Université Paris Diderot, Sorbonne Paris Cite, Laboratoire d'excellence INFLAMEX, Paris, France
| | - Loïc Rolas
- Center of Research on Inflammation, Inserm UMRS-1149, Paris, France; Center of Research on Inflammation, CNRS ERL 8252, Paris, France; Center of Research on Inflammation, Université Paris Diderot, Sorbonne Paris Cite, Laboratoire d'excellence INFLAMEX, Paris, France
| | - Maguelonne Pons
- Center of Research on Inflammation, Inserm UMRS-1149, Paris, France; Center of Research on Inflammation, CNRS ERL 8252, Paris, France; Center of Research on Inflammation, Université Paris Diderot, Sorbonne Paris Cite, Laboratoire d'excellence INFLAMEX, Paris, France
| | - Iris Karina Madera-Salcedo
- Center of Research on Inflammation, Inserm UMRS-1149, Paris, France; Center of Research on Inflammation, CNRS ERL 8252, Paris, France; Center of Research on Inflammation, Université Paris Diderot, Sorbonne Paris Cite, Laboratoire d'excellence INFLAMEX, Paris, France
| | - Walid Beghdadi
- Center of Research on Inflammation, Inserm UMRS-1149, Paris, France; Center of Research on Inflammation, CNRS ERL 8252, Paris, France; Center of Research on Inflammation, Université Paris Diderot, Sorbonne Paris Cite, Laboratoire d'excellence INFLAMEX, Paris, France
| | - Alaa El Ghoneimi
- Center of Research on Inflammation, Inserm UMRS-1149, Paris, France; Center of Research on Inflammation, CNRS ERL 8252, Paris, France; Center of Research on Inflammation, Université Paris Diderot, Sorbonne Paris Cite, Laboratoire d'excellence INFLAMEX, Paris, France; Department of Pediatric Surgery and Urology, Hopital Robert Debré, APHP, Université Paris Diderot, Sorbonne Paris Cité, Paris, France
| | - Marc Benhamou
- Center of Research on Inflammation, Inserm UMRS-1149, Paris, France; Center of Research on Inflammation, CNRS ERL 8252, Paris, France; Center of Research on Inflammation, Université Paris Diderot, Sorbonne Paris Cite, Laboratoire d'excellence INFLAMEX, Paris, France
| | - Pierre Launay
- Center of Research on Inflammation, Inserm UMRS-1149, Paris, France; Center of Research on Inflammation, CNRS ERL 8252, Paris, France; Center of Research on Inflammation, Université Paris Diderot, Sorbonne Paris Cite, Laboratoire d'excellence INFLAMEX, Paris, France
| | - Magnus Abrink
- Immunology Section, Department of Biomedical Sciences and Veterinary Public Health, Swedish University of Agricultural Sciences, VHC, Uppsala, Sweden
| | - Gunnar Pejler
- Department of Anatomy, Physiology and Biochemistry, Swedish University of Agricultural Sciences, Uppsala, Sweden; Department of Medical Biochemistry and Microbiology, Uppsala University, Uppsala, Sweden
| | - Ivan Cruz Moura
- INSERM UMR 1163, Laboratory of Cellular and Molecular Mechanisms of Hematological Disorders and Therapeutic Implications, Paris, France; Imagine Institute, Paris Descartes-Sorbonne Paris Cité University, Laboratory of Excellence GR-Ex, Paris, France; CNRS ERL 8254, Laboratory of Cellular and Molecular Mechanisms of Hematological Disorders and Therapeutic Implications, Paris, France
| | - Nicolas Charles
- Center of Research on Inflammation, Inserm UMRS-1149, Paris, France; Center of Research on Inflammation, CNRS ERL 8252, Paris, France; Center of Research on Inflammation, Université Paris Diderot, Sorbonne Paris Cite, Laboratoire d'excellence INFLAMEX, Paris, France
| | - Eric Daugas
- Center of Research on Inflammation, Inserm UMRS-1149, Paris, France; Center of Research on Inflammation, CNRS ERL 8252, Paris, France; Center of Research on Inflammation, Université Paris Diderot, Sorbonne Paris Cite, Laboratoire d'excellence INFLAMEX, Paris, France; Service de Néphrologie, Hôpital Universitaire Bichat-Claude Bernard, Assistance Publique-Hôpitaux de Paris, Paris, France
| | - Axel Perianin
- Center of Research on Inflammation, Inserm UMRS-1149, Paris, France; Center of Research on Inflammation, CNRS ERL 8252, Paris, France; Center of Research on Inflammation, Université Paris Diderot, Sorbonne Paris Cite, Laboratoire d'excellence INFLAMEX, Paris, France
| | - Ulrich Blank
- Center of Research on Inflammation, Inserm UMRS-1149, Paris, France; Center of Research on Inflammation, CNRS ERL 8252, Paris, France; Center of Research on Inflammation, Université Paris Diderot, Sorbonne Paris Cite, Laboratoire d'excellence INFLAMEX, Paris, France.
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14
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Proteomic Analysis of Lipid Rafts from RBL-2H3 Mast Cells. Int J Mol Sci 2019; 20:ijms20163904. [PMID: 31405203 PMCID: PMC6720779 DOI: 10.3390/ijms20163904] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2019] [Revised: 08/01/2019] [Accepted: 08/08/2019] [Indexed: 12/15/2022] Open
Abstract
Lipid rafts are highly ordered membrane microdomains enriched in cholesterol, glycosphingolipids, and certain proteins. They are involved in the regulation of cellular processes in diverse cell types, including mast cells (MCs). The MC lipid raft protein composition was assessed using qualitative mass spectrometric characterization of the proteome from detergent-resistant membrane fractions from RBL-2H3 MCs. Using two different post-isolation treatment methods, a total of 949 lipid raft associated proteins were identified. The majority of these MC lipid raft proteins had already been described in the RaftProtV2 database and are among highest cited/experimentally validated lipid raft proteins. Additionally, more than half of the identified proteins had lipid modifications and/or transmembrane domains. Classification of identified proteins into functional categories showed that the proteins were associated with cellular membrane compartments, and with some biological and molecular functions, such as regulation, localization, binding, catalytic activity, and response to stimulus. Furthermore, functional enrichment analysis demonstrated an intimate involvement of identified proteins with various aspects of MC biological processes, especially those related to regulated secretion, organization/stabilization of macromolecules complexes, and signal transduction. This study represents the first comprehensive proteomic profile of MC lipid rafts and provides additional information to elucidate immunoregulatory functions coordinated by raft proteins in MCs.
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15
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Klein O, Sagi-Eisenberg R. Anaphylactic Degranulation of Mast Cells: Focus on Compound Exocytosis. J Immunol Res 2019; 2019:9542656. [PMID: 31011586 PMCID: PMC6442490 DOI: 10.1155/2019/9542656] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2018] [Accepted: 12/26/2018] [Indexed: 01/15/2023] Open
Abstract
Anaphylaxis is a notorious type 2 immune response which may result in a systemic response and lead to death. A precondition for the unfolding of the anaphylactic shock is the secretion of inflammatory mediators from mast cells in response to an allergen, mostly through activation of the cells via the IgE-dependent pathway. While mast cells are specialized secretory cells that can secrete through a variety of exocytic modes, the most predominant mode exerted by the mast cell during anaphylaxis is compound exocytosis-a specialized form of regulated exocytosis where secretory granules fuse to one another. Here, we review the modes of regulated exocytosis in the mast cell and focus on compound exocytosis. We review historical landmarks in the research of compound exocytosis in mast cells and the methods available for investigating compound exocytosis. We also review the molecular mechanisms reported to underlie compound exocytosis in mast cells and expand further with reviewing key findings from other cell types. Finally, we discuss the possible reasons for the mast cell to utilize compound exocytosis during anaphylaxis, the conflicting evidence in different mast cell models, and the open questions in the field which remain to be answered.
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Affiliation(s)
- Ofir Klein
- Department of Cell and Developmental Biology, Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv 69978, Israel
| | - Ronit Sagi-Eisenberg
- Department of Cell and Developmental Biology, Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv 69978, Israel
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16
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Sanchez E, Gonzalez EA, Moreno DS, Cardenas RA, Ramos MA, Davalos AJ, Manllo J, Rodarte AI, Petrova Y, Moreira DC, Chavez MA, Tortoriello A, Lara A, Gutierrez BA, Burns AR, Heidelberger R, Adachi R. Syntaxin 3, but not syntaxin 4, is required for mast cell-regulated exocytosis, where it plays a primary role mediating compound exocytosis. J Biol Chem 2019; 294:3012-3023. [PMID: 30563839 PMCID: PMC6398129 DOI: 10.1074/jbc.ra118.005532] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2018] [Revised: 11/30/2018] [Indexed: 11/06/2022] Open
Abstract
Mast cells (MCs) participate in allergy, inflammation, and defense against pathogens. They release multiple immune mediators via exocytosis, a process that requires SNARE proteins, including syntaxins (Stxs). The identity of the Stxs involved in MC exocytosis remains controversial. Here, we studied the roles of Stx3 and -4 in fully developed MCs from conditional knockout mice by electrophysiology and EM, and found that Stx3, and not Stx4, is crucial for MC exocytosis. The main defect seen in Stx3-deficient MCs was their inability to engage multigranular compound exocytosis, while leaving most single-vesicle fusion events intact. We used this defect to show that this form of exocytosis is not only required to accelerate MC degranulation but also essential to achieve full degranulation. The exocytic defect was severe but not absolute, indicating that an Stx other than Stx3 and -4 is also required for exocytosis in MCs. The removal of Stx3 affected only regulated exocytosis, leaving other MC effector responses intact, including the secretion of cytokines via constitutive exocytosis. Our in vivo model of passive systemic anaphylaxis showed that the residual exocytic function of Stx3-deficient MCs was sufficient to drive a full anaphylactic response in mice.
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Affiliation(s)
- Elizabeth Sanchez
- From the Department of Pulmonary Medicine, University of Texas M.D. Anderson Cancer Center, Houston, Texas 77030
- Tecnologico de Monterrey, Escuela de Medicina y Ciencias de la Salud, Monterrey, Nuevo León 64710, México
| | - Erika A Gonzalez
- From the Department of Pulmonary Medicine, University of Texas M.D. Anderson Cancer Center, Houston, Texas 77030
- Tecnologico de Monterrey, Escuela de Medicina y Ciencias de la Salud, Monterrey, Nuevo León 64710, México
| | - David S Moreno
- From the Department of Pulmonary Medicine, University of Texas M.D. Anderson Cancer Center, Houston, Texas 77030
- Tecnologico de Monterrey, Escuela de Medicina y Ciencias de la Salud, Monterrey, Nuevo León 64710, México
| | - Rodolfo A Cardenas
- From the Department of Pulmonary Medicine, University of Texas M.D. Anderson Cancer Center, Houston, Texas 77030
- Tecnologico de Monterrey, Escuela de Medicina y Ciencias de la Salud, Monterrey, Nuevo León 64710, México
| | - Marco A Ramos
- From the Department of Pulmonary Medicine, University of Texas M.D. Anderson Cancer Center, Houston, Texas 77030
- Tecnologico de Monterrey, Escuela de Medicina y Ciencias de la Salud, Monterrey, Nuevo León 64710, México
| | - Alfredo J Davalos
- From the Department of Pulmonary Medicine, University of Texas M.D. Anderson Cancer Center, Houston, Texas 77030
- Tecnologico de Monterrey, Escuela de Medicina y Ciencias de la Salud, Monterrey, Nuevo León 64710, México
| | - John Manllo
- From the Department of Pulmonary Medicine, University of Texas M.D. Anderson Cancer Center, Houston, Texas 77030
- Tecnologico de Monterrey, Escuela de Medicina y Ciencias de la Salud, Monterrey, Nuevo León 64710, México
| | - Alejandro I Rodarte
- From the Department of Pulmonary Medicine, University of Texas M.D. Anderson Cancer Center, Houston, Texas 77030
- Tecnologico de Monterrey, Escuela de Medicina y Ciencias de la Salud, Monterrey, Nuevo León 64710, México
| | - Youlia Petrova
- From the Department of Pulmonary Medicine, University of Texas M.D. Anderson Cancer Center, Houston, Texas 77030
| | - Daniel C Moreira
- From the Department of Pulmonary Medicine, University of Texas M.D. Anderson Cancer Center, Houston, Texas 77030
- Tecnologico de Monterrey, Escuela de Medicina y Ciencias de la Salud, Monterrey, Nuevo León 64710, México
| | - Miguel A Chavez
- From the Department of Pulmonary Medicine, University of Texas M.D. Anderson Cancer Center, Houston, Texas 77030
- Tecnologico de Monterrey, Escuela de Medicina y Ciencias de la Salud, Monterrey, Nuevo León 64710, México
| | - Alejandro Tortoriello
- From the Department of Pulmonary Medicine, University of Texas M.D. Anderson Cancer Center, Houston, Texas 77030
- Tecnologico de Monterrey, Escuela de Medicina y Ciencias de la Salud, Monterrey, Nuevo León 64710, México
| | - Adolfo Lara
- the Department of Neurobiology and Anatomy, McGovern Medical School at the University of Texas Health Science Center, Houston, Texas 77030, and
| | - Berenice A Gutierrez
- From the Department of Pulmonary Medicine, University of Texas M.D. Anderson Cancer Center, Houston, Texas 77030
- Tecnologico de Monterrey, Escuela de Medicina y Ciencias de la Salud, Monterrey, Nuevo León 64710, México
| | - Alan R Burns
- the College of Optometry, University of Houston, Houston, Texas 77204
| | - Ruth Heidelberger
- the Department of Neurobiology and Anatomy, McGovern Medical School at the University of Texas Health Science Center, Houston, Texas 77030, and
| | - Roberto Adachi
- From the Department of Pulmonary Medicine, University of Texas M.D. Anderson Cancer Center, Houston, Texas 77030,
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17
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Madera-Salcedo IK, Danelli L, Tiwari N, Dema B, Pacreau E, Vibhushan S, Birnbaum J, Agabriel C, Liabeuf V, Klingebiel C, Menasche G, Macias-Silva M, Benhamou M, Charles N, González-Espinosa C, Vitte J, Blank U. Tomosyn functions as a PKCδ-regulated fusion clamp in mast cell degranulation. Sci Signal 2018; 11:11/537/eaan4350. [DOI: 10.1126/scisignal.aan4350] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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18
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Bin NR, Ma K, Tien CW, Wang S, Zhu D, Park S, Turlova E, Sugita K, Shirakawa R, van der Sluijs P, Horiuchi H, Sun HS, Monnier PP, Gaisano HY, Sugita S. C2 Domains of Munc13-4 Are Crucial for Ca 2+-Dependent Degranulation and Cytotoxicity in NK Cells. THE JOURNAL OF IMMUNOLOGY 2018; 201:700-713. [PMID: 29884704 DOI: 10.4049/jimmunol.1800426] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/22/2018] [Accepted: 05/18/2018] [Indexed: 11/19/2022]
Abstract
In the immune system, degranulation/exocytosis from lymphocytes is crucial for life through facilitating eradication of infected and malignant cells. Dysfunction of the NK cell exocytosis process has been implicated with devastating immune diseases, such as familial hemophagocytic lymphohistiocytosis, yet the underlying molecular mechanisms of such processes have remained elusive. In particular, although the lytic granule exocytosis from NK cells is strictly Ca2+-dependent, the molecular identity of the Ca2+ sensor has yet to be identified. In this article, we show multiple lines of evidence in which point mutations in aspartic acid residues in both C2 domains of human Munc13-4, whose mutation underlies familial hemophagocytic lymphohistiocytosis type 3, diminished exocytosis with dramatically altered Ca2+ sensitivity in both mouse primary NK cells as well as rat mast cell lines. Furthermore, these mutations within the C2 domains severely impaired NK cell cytotoxicity against malignant cells. Total internal reflection fluorescence microscopy analysis revealed that the mutations strikingly altered Ca2+ dependence of fusion pore opening of each single granule and frequency of fusion events. Our results demonstrate that both C2 domains of Munc13-4 play critical roles in Ca2+-dependent exocytosis and cytotoxicity by regulating single-granule membrane fusion dynamics in immune cells.
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Affiliation(s)
- Na-Ryum Bin
- Division of Fundamental Neurobiology, Krembil Research Institute, University Health Network, Toronto, Ontario M5T 2S8, Canada.,Department of Physiology, University of Toronto, Toronto, Ontario M5S 1A8, Canada
| | - Ke Ma
- Division of Fundamental Neurobiology, Krembil Research Institute, University Health Network, Toronto, Ontario M5T 2S8, Canada.,Department of Physiology, University of Toronto, Toronto, Ontario M5S 1A8, Canada
| | - Chi-Wei Tien
- Division of Fundamental Neurobiology, Krembil Research Institute, University Health Network, Toronto, Ontario M5T 2S8, Canada.,Department of Physiology, University of Toronto, Toronto, Ontario M5S 1A8, Canada
| | - Siyan Wang
- Division of Fundamental Neurobiology, Krembil Research Institute, University Health Network, Toronto, Ontario M5T 2S8, Canada.,Department of Physiology, University of Toronto, Toronto, Ontario M5S 1A8, Canada
| | - Dan Zhu
- Department of Physiology, University of Toronto, Toronto, Ontario M5S 1A8, Canada.,Department of Medicine, University of Toronto, Toronto, Ontario M5S 1A8, Canada
| | - Seungmee Park
- Division of Fundamental Neurobiology, Krembil Research Institute, University Health Network, Toronto, Ontario M5T 2S8, Canada.,Department of Physiology, University of Toronto, Toronto, Ontario M5S 1A8, Canada
| | - Ekaterina Turlova
- Department of Physiology, University of Toronto, Toronto, Ontario M5S 1A8, Canada.,Department of Surgery, University of Toronto, Toronto, Ontario M5S 1A8, Canada
| | - Kyoko Sugita
- Division of Genetics and Development, Krembil Research Institute, University Health Network, Toronto, Ontario M5T 2S8, Canada
| | - Ryutaro Shirakawa
- Department of Molecular and Cellular Biology, Institute of Development, Aging and Cancer, Tohoku University, Sendai 980-8575, Japan; and
| | - Peter van der Sluijs
- Department of Cell Biology, University Medical Center Utrecht, 3584 CX Utrecht, the Netherlands
| | - Hisanori Horiuchi
- Department of Molecular and Cellular Biology, Institute of Development, Aging and Cancer, Tohoku University, Sendai 980-8575, Japan; and
| | - Hong-Shuo Sun
- Department of Physiology, University of Toronto, Toronto, Ontario M5S 1A8, Canada.,Department of Surgery, University of Toronto, Toronto, Ontario M5S 1A8, Canada
| | - Philippe P Monnier
- Department of Physiology, University of Toronto, Toronto, Ontario M5S 1A8, Canada.,Division of Genetics and Development, Krembil Research Institute, University Health Network, Toronto, Ontario M5T 2S8, Canada
| | - Herbert Y Gaisano
- Department of Physiology, University of Toronto, Toronto, Ontario M5S 1A8, Canada.,Department of Medicine, University of Toronto, Toronto, Ontario M5S 1A8, Canada
| | - Shuzo Sugita
- Division of Fundamental Neurobiology, Krembil Research Institute, University Health Network, Toronto, Ontario M5T 2S8, Canada; .,Department of Physiology, University of Toronto, Toronto, Ontario M5S 1A8, Canada
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19
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Schillemans M, Karampini E, van den Eshof BL, Gangaev A, Hofman M, van Breevoort D, Meems H, Janssen H, Mulder AA, Jost CR, Escher JC, Adam R, Carter T, Koster AJ, van den Biggelaar M, Voorberg J, Bierings R. Weibel-Palade Body Localized Syntaxin-3 Modulates Von Willebrand Factor Secretion From Endothelial Cells. Arterioscler Thromb Vasc Biol 2018; 38:1549-1561. [PMID: 29880488 PMCID: PMC6039413 DOI: 10.1161/atvbaha.117.310701] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2017] [Accepted: 05/17/2018] [Indexed: 01/08/2023]
Abstract
Supplemental Digital Content is available in the text. Objective— Endothelial cells store VWF (von Willebrand factor) in rod-shaped secretory organelles, called Weibel-Palade bodies (WPBs). WPB exocytosis is coordinated by a complex network of Rab GTPases, Rab effectors, and SNARE (soluble NSF attachment protein receptor) proteins. We have previously identified STXBP1 as the link between the Rab27A-Slp4-a complex on WPBs and the SNARE proteins syntaxin-2 and -3. In this study, we investigate the function of syntaxin-3 in VWF secretion. Approach and Results— In human umbilical vein endothelial cells and in blood outgrowth endothelial cells (BOECs) from healthy controls, endogenous syntaxin-3 immunolocalized to WPBs. A detailed analysis of BOECs isolated from a patient with variant microvillus inclusion disease, carrying a homozygous mutation in STX3(STX3−/−), showed a loss of syntaxin-3 protein and absence of WPB-associated syntaxin-3 immunoreactivity. Ultrastructural analysis revealed no detectable differences in morphology or prevalence of immature or mature WPBs in control versus STX3−/− BOECs. VWF multimer analysis showed normal patterns in plasma of the microvillus inclusion disease patient, and media from STX3−/− BOECs, together indicating WPB formation and maturation are unaffected by absence of syntaxin-3. However, a defect in basal as well as Ca2+- and cAMP-mediated VWF secretion was found in the STX3−/− BOECs. We also show that syntaxin-3 interacts with the WPB-associated SNARE protein VAMP8 (vesicle-associated membrane protein-8). Conclusions— Our data reveal syntaxin-3 as a novel WPB-associated SNARE protein that controls WPB exocytosis.
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Affiliation(s)
- Maaike Schillemans
- From the Plasma Proteins, Sanquin Research and Landsteiner Laboratory, Academic Medical Center, University of Amsterdam, The Netherlands (M.S., E.K., B.L.v.d.E., A.G., M.H., D.v.B., H.M., M.v.d.B., J.V., R.B.)
| | - Ellie Karampini
- From the Plasma Proteins, Sanquin Research and Landsteiner Laboratory, Academic Medical Center, University of Amsterdam, The Netherlands (M.S., E.K., B.L.v.d.E., A.G., M.H., D.v.B., H.M., M.v.d.B., J.V., R.B.)
| | - Bart L van den Eshof
- From the Plasma Proteins, Sanquin Research and Landsteiner Laboratory, Academic Medical Center, University of Amsterdam, The Netherlands (M.S., E.K., B.L.v.d.E., A.G., M.H., D.v.B., H.M., M.v.d.B., J.V., R.B.)
| | - Anastasia Gangaev
- From the Plasma Proteins, Sanquin Research and Landsteiner Laboratory, Academic Medical Center, University of Amsterdam, The Netherlands (M.S., E.K., B.L.v.d.E., A.G., M.H., D.v.B., H.M., M.v.d.B., J.V., R.B.)
| | - Menno Hofman
- From the Plasma Proteins, Sanquin Research and Landsteiner Laboratory, Academic Medical Center, University of Amsterdam, The Netherlands (M.S., E.K., B.L.v.d.E., A.G., M.H., D.v.B., H.M., M.v.d.B., J.V., R.B.)
| | - Dorothee van Breevoort
- From the Plasma Proteins, Sanquin Research and Landsteiner Laboratory, Academic Medical Center, University of Amsterdam, The Netherlands (M.S., E.K., B.L.v.d.E., A.G., M.H., D.v.B., H.M., M.v.d.B., J.V., R.B.)
| | - Henriët Meems
- From the Plasma Proteins, Sanquin Research and Landsteiner Laboratory, Academic Medical Center, University of Amsterdam, The Netherlands (M.S., E.K., B.L.v.d.E., A.G., M.H., D.v.B., H.M., M.v.d.B., J.V., R.B.)
| | - Hans Janssen
- Cell Biology, The Netherlands Cancer Institute, Amsterdam (H.J.)
| | - Aat A Mulder
- Molecular Cell Biology, Section Electron Microscopy, Leiden University Medical Center, The Netherlands (A.A.M., C.R.J., A.J.K.)
| | - Carolina R Jost
- Molecular Cell Biology, Section Electron Microscopy, Leiden University Medical Center, The Netherlands (A.A.M., C.R.J., A.J.K.)
| | - Johanna C Escher
- Pediatric Gastroenterology, Sophia Children's Hospital, Erasmus MC, Rotterdam, The Netherlands (J.C.E.)
| | - Rüdiger Adam
- Pediatric Gastroenterology, University Medical Centre, Mannheim, Germany (R.A.)
| | - Tom Carter
- St George's, University of London, United Kingdom (T.C.)
| | - Abraham J Koster
- Molecular Cell Biology, Section Electron Microscopy, Leiden University Medical Center, The Netherlands (A.A.M., C.R.J., A.J.K.)
| | - Maartje van den Biggelaar
- From the Plasma Proteins, Sanquin Research and Landsteiner Laboratory, Academic Medical Center, University of Amsterdam, The Netherlands (M.S., E.K., B.L.v.d.E., A.G., M.H., D.v.B., H.M., M.v.d.B., J.V., R.B.)
| | - Jan Voorberg
- From the Plasma Proteins, Sanquin Research and Landsteiner Laboratory, Academic Medical Center, University of Amsterdam, The Netherlands (M.S., E.K., B.L.v.d.E., A.G., M.H., D.v.B., H.M., M.v.d.B., J.V., R.B.).,Department of Vascular Medicine, Academic Medical Center, University of Amsterdam, The Netherlands (J.V.)
| | - Ruben Bierings
- From the Plasma Proteins, Sanquin Research and Landsteiner Laboratory, Academic Medical Center, University of Amsterdam, The Netherlands (M.S., E.K., B.L.v.d.E., A.G., M.H., D.v.B., H.M., M.v.d.B., J.V., R.B.)
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20
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Gutierrez BA, Chavez MA, Rodarte AI, Ramos MA, Dominguez A, Petrova Y, Davalos AJ, Costa RM, Elizondo R, Tuvim MJ, Dickey BF, Burns AR, Heidelberger R, Adachi R. Munc18-2, but not Munc18-1 or Munc18-3, controls compound and single-vesicle-regulated exocytosis in mast cells. J Biol Chem 2018; 293:7148-7159. [PMID: 29599294 DOI: 10.1074/jbc.ra118.002455] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2018] [Revised: 03/20/2018] [Indexed: 11/06/2022] Open
Abstract
Mast cells (MCs) play pivotal roles in many inflammatory conditions including infections, anaphylaxis, and asthma. MCs store immunoregulatory compounds in their large cytoplasmic granules and, upon stimulation, secrete them via regulated exocytosis. Exocytosis in many cells requires the participation of Munc18 proteins (also known as syntaxin-binding proteins), and we found that mature MCs express all three mammalian isoforms: Munc18-1, -2, and -3. To study their functions in MC effector responses and test the role of MC degranulation in anaphylaxis, we used conditional knockout (cKO) mice in which each Munc18 protein was deleted exclusively in MCs. Using recordings of plasma membrane capacitance for high-resolution analysis of exocytosis in individual MCs, we observed an almost complete absence of exocytosis in Munc18-2-deficient MCs but intact exocytosis in MCs lacking Munc18-1 or Munc18-3. Stereological analysis of EM images of stimulated MCs revealed that the deletion of Munc18-2 also abolishes the homotypic membrane fusion required for compound exocytosis. We confirmed the severe defect in regulated exocytosis in the absence of Munc18-2 by measuring the secretion of mediators stored in MC granules. Munc18-2 cKO mice had normal morphology, development, and distribution of their MCs, indicating that Munc18-2 is not essential for the migration, retention, and maturation of MC-committed progenitors. Despite that, we found that Munc18-2 cKO mice were significantly protected from anaphylaxis. In conclusion, MC-regulated exocytosis is required for the anaphylactic response, and Munc18-2 is the sole Munc18 isoform that mediates membrane fusion during MC degranulation.
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Affiliation(s)
- Berenice A Gutierrez
- Department of Pulmonary Medicine, University of Texas M. D. Anderson Cancer Center, Houston, Texas 77030; Escuela de Ingeniería y Ciencias, Tecnologico de Monterrey, Monterrey NL 64849 México
| | - Miguel A Chavez
- Department of Pulmonary Medicine, University of Texas M. D. Anderson Cancer Center, Houston, Texas 77030; Escuela de Medicina y Ciencias de la Salud, Tecnologico de Monterrey, Monterrey NL 64710 México
| | - Alejandro I Rodarte
- Department of Pulmonary Medicine, University of Texas M. D. Anderson Cancer Center, Houston, Texas 77030; Escuela de Medicina y Ciencias de la Salud, Tecnologico de Monterrey, Monterrey NL 64710 México
| | - Marco A Ramos
- Department of Pulmonary Medicine, University of Texas M. D. Anderson Cancer Center, Houston, Texas 77030
| | - Andrea Dominguez
- Escuela de Medicina y Ciencias de la Salud, Tecnologico de Monterrey, Monterrey NL 64710 México
| | - Youlia Petrova
- Department of Pulmonary Medicine, University of Texas M. D. Anderson Cancer Center, Houston, Texas 77030
| | - Alfredo J Davalos
- Department of Pulmonary Medicine, University of Texas M. D. Anderson Cancer Center, Houston, Texas 77030
| | - Renan M Costa
- Graduate School of Biomedical Sciences, Houston, Texas 77030
| | - Ramon Elizondo
- Escuela de Medicina y Ciencias de la Salud, Tecnologico de Monterrey, Monterrey NL 64710 México
| | - Michael J Tuvim
- Department of Pulmonary Medicine, University of Texas M. D. Anderson Cancer Center, Houston, Texas 77030
| | - Burton F Dickey
- Department of Pulmonary Medicine, University of Texas M. D. Anderson Cancer Center, Houston, Texas 77030
| | - Alan R Burns
- College of Optometry, University of Houston, Houston, Texas 77204
| | - Ruth Heidelberger
- Department of Neurobiology and Anatomy, McGovern Medical School, University of Texas Health Science Center, Houston, Texas 77030
| | - Roberto Adachi
- Department of Pulmonary Medicine, University of Texas M. D. Anderson Cancer Center, Houston, Texas 77030.
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21
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Diverse exocytic pathways for mast cell mediators. Biochem Soc Trans 2018; 46:235-247. [PMID: 29472369 DOI: 10.1042/bst20170450] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2017] [Revised: 12/23/2017] [Accepted: 01/04/2018] [Indexed: 12/14/2022]
Abstract
Mast cells play pivotal roles in innate and adaptive immunities but are also culprits in allergy, autoimmunity, and cardiovascular diseases. Mast cells respond to environmental changes by initiating regulated exocytosis/secretion of various biologically active compounds called mediators (e.g. proteases, amines, and cytokines). Many of these mediators are stored in granules/lysosomes and rely on intricate degranulation processes for release. Mast cell stabilizers (e.g. sodium cromoglicate), which prevent such degranulation processes, have therefore been clinically employed to treat asthma and allergic rhinitis. However, it has become increasingly clear that different mast cell diseases often involve multiple mediators that rely on overlapping but distinct mechanisms for release. This review illustrates existing evidence that highlights the diverse exocytic pathways in mast cells. We also discuss strategies to delineate these pathways so as to identify unique molecular components which could serve as new drug targets for more effective and specific treatments against mast cell-related diseases.
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22
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Falcone FH, Wan D, Barwary N, Sagi-Eisenberg R. RBL cells as models for in vitro studies of mast cells and basophils. Immunol Rev 2018; 282:47-57. [DOI: 10.1111/imr.12628] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Franco H. Falcone
- Division of Molecular Therapeutics and Formulation; School of Pharmacy; University of Nottingham; Nottingham UK
| | - Daniel Wan
- Division of Molecular Therapeutics and Formulation; School of Pharmacy; University of Nottingham; Nottingham UK
| | - Nafal Barwary
- Division of Molecular Therapeutics and Formulation; School of Pharmacy; University of Nottingham; Nottingham UK
| | - Ronit Sagi-Eisenberg
- Department of Cell and Developmental Biology; Sackler Faculty of Medicine; Tel Aviv University; Tel Aviv Israel
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23
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Morey C, Kienle CN, Klöpper TH, Burkhardt P, Fasshauer D. Evidence for a conserved inhibitory binding mode between the membrane fusion assembly factors Munc18 and syntaxin in animals. J Biol Chem 2017; 292:20449-20460. [PMID: 29046354 DOI: 10.1074/jbc.m117.811182] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2017] [Revised: 10/10/2017] [Indexed: 12/30/2022] Open
Abstract
The membrane fusion necessary for vesicle trafficking is driven by the assembly of heterologous SNARE proteins orchestrated by the binding of Sec1/Munc18 (SM) proteins to specific syntaxin SNARE proteins. However, the precise mode of interaction between SM proteins and SNAREs is debated, as contrasting binding modes have been found for different members of the SM protein family, including the three vertebrate Munc18 isoforms. While different binding modes could be necessary, given their roles in different secretory processes in different tissues, the structural similarity of the three isoforms makes this divergence perplexing. Although the neuronal isoform Munc18a is well-established to bind tightly to both the closed conformation and the N-peptide of syntaxin 1a, thereby inhibiting SNARE complex formation, Munc18b and -c, which have a more widespread distribution, are reported to mainly interact with the N-peptide of their partnering syntaxins and are thought to instead promote SNARE complex formation. We have reinvestigated the interaction between Munc18c and syntaxin 4 (Syx4). Using isothermal titration calorimetry, we found that Munc18c, like Munc18a, binds to both the closed conformation and the N-peptide of Syx4. Furthermore, using a novel kinetic approach, we found that Munc18c, like Munc18a, slows down SNARE complex formation through high-affinity binding to syntaxin. This strongly suggests that secretory Munc18s in general control the accessibility of the bound syntaxin, probably preparing it for SNARE complex assembly.
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Affiliation(s)
- Czuee Morey
- From the Département des neurosciences fondamentales, Université de Lausanne, Rue du Bugnon 9, CH-1005 Lausanne, Switzerland
| | - C Nickias Kienle
- From the Département des neurosciences fondamentales, Université de Lausanne, Rue du Bugnon 9, CH-1005 Lausanne, Switzerland
| | - Tobias H Klöpper
- Whitehat Life Sciences Ltd., 20 Wenlock Road, N1 7GU London, United Kingdom, and
| | - Pawel Burkhardt
- the Marine Biological Association, Citadel Hill Marine Laboratory, Plymouth PL1 2PB, United Kingdom
| | - Dirk Fasshauer
- From the Département des neurosciences fondamentales, Université de Lausanne, Rue du Bugnon 9, CH-1005 Lausanne, Switzerland,
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24
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Datta P, Gilliam J, Thoreson WB, Janz R, Heidelberger R. Two Pools of Vesicles Associated with Synaptic Ribbons Are Molecularly Prepared for Release. Biophys J 2017; 113:2281-2298. [PMID: 28863864 DOI: 10.1016/j.bpj.2017.08.012] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2017] [Revised: 07/28/2017] [Accepted: 08/07/2017] [Indexed: 11/17/2022] Open
Abstract
Neurons that form ribbon-style synapses are specialized for continuous exocytosis. To this end, their synaptic terminals contain numerous synaptic vesicles, some of which are ribbon associated, that have difference susceptibilities for undergoing Ca2+-dependent exocytosis. In this study, we probed the relationship between previously defined vesicle populations and determined their fusion competency with respect to SNARE complex formation. We found that both the rapidly releasing vesicle pool and the releasable vesicle pool of the retinal bipolar cell are situated at the ribbon-style active zones, where they functionally interact. A peptide inhibitor of SNARE complex formation failed to block exocytosis from either pool, suggesting that these two vesicle pools have formed the SNARE complexes necessary for fusion. By contrast, a third, slower component of exocytosis was blocked by the peptide, as was the functional replenishment of vesicle pools, indicating that few vesicles outside of the ribbon-style active zones were initially fusion competent. In cone photoreceptors, similar to bipolar cells, fusion of the initial ribbon-associated synaptic vesicle cohort was not blocked by the SNARE complex-inhibiting peptide, whereas a later phase of exocytosis, attributable to the recruitment and subsequent fusion of vesicles newly arrived at the synaptic ribbons, was blocked. Together, our results support a model in which stimulus-evoked exocytosis in retinal ribbon synapses is SNARE-dependent; where vesicles higher up on the synaptic ribbon replenish the rapidly releasing vesicle pool; and at any given time, there are sufficient SNARE complexes to support the fusion of the entire ribbon-associated cohort of vesicles. An important implication of these results is that ribbon-associated vesicles can form intervesicular SNARE complexes, providing mechanistic insight into compound fusion at ribbon-style synapses.
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Affiliation(s)
- Proleta Datta
- Department of Neurobiology and Anatomy, McGovern Medical School, University of Texas Health Science Center at Houston (UTHealth), Houston, Texas; The University of Texas MD Anderson Cancer Center, UTHealth Graduate School of Biomedical Sciences, Houston, Texas
| | - Jared Gilliam
- Department of Neurobiology and Anatomy, McGovern Medical School, University of Texas Health Science Center at Houston (UTHealth), Houston, Texas
| | - Wallace B Thoreson
- Truhlsen Eye Institute, Department of Ophthalmology and Visual Sciences, University of Nebraska Medical Center, Omaha, Nebraska; Department of Pharmacology and Experimental Neuroscience, University of Nebraska Medical Center, Omaha, Nebraska
| | - Roger Janz
- Department of Neurobiology and Anatomy, McGovern Medical School, University of Texas Health Science Center at Houston (UTHealth), Houston, Texas; The University of Texas MD Anderson Cancer Center, UTHealth Graduate School of Biomedical Sciences, Houston, Texas
| | - Ruth Heidelberger
- Department of Neurobiology and Anatomy, McGovern Medical School, University of Texas Health Science Center at Houston (UTHealth), Houston, Texas; The University of Texas MD Anderson Cancer Center, UTHealth Graduate School of Biomedical Sciences, Houston, Texas.
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25
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Dieckmann NMG, Frazer GL, Asano Y, Stinchcombe JC, Griffiths GM. The cytotoxic T lymphocyte immune synapse at a glance. J Cell Sci 2017; 129:2881-6. [PMID: 27505426 DOI: 10.1242/jcs.186205] [Citation(s) in RCA: 56] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
The immune synapse provides an important structure for communication with immune cells. Studies on immune synapses formed by cytotoxic T lymphocytes (CTLs) highlight the dynamic changes and specialised mechanisms required to facilitate focal signalling and polarised secretion in immune cells. In this Cell Science at a Glance article and the accompanying poster, we illustrate the different steps that reveal the specialised mechanisms used to focus secretion at the CTL immune synapse and allow CTLs to be such efficient and precise serial killers.
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Affiliation(s)
- Nele M G Dieckmann
- Cambridge Institute for Medical Research, Biomedical Campus, Cambridge CB2 0XY, UK
| | - Gordon L Frazer
- Cambridge Institute for Medical Research, Biomedical Campus, Cambridge CB2 0XY, UK
| | - Yukako Asano
- Cambridge Institute for Medical Research, Biomedical Campus, Cambridge CB2 0XY, UK
| | - Jane C Stinchcombe
- Cambridge Institute for Medical Research, Biomedical Campus, Cambridge CB2 0XY, UK
| | - Gillian M Griffiths
- Cambridge Institute for Medical Research, Biomedical Campus, Cambridge CB2 0XY, UK
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26
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Munoz I, Danelli L, Claver J, Goudin N, Kurowska M, Madera-Salcedo IK, Huang JD, Fischer A, González-Espinosa C, de Saint Basile G, Blank U, Ménasché G. Kinesin-1 controls mast cell degranulation and anaphylaxis through PI3K-dependent recruitment to the granular Slp3/Rab27b complex. J Cell Biol 2017; 215:203-216. [PMID: 27810912 PMCID: PMC5084650 DOI: 10.1083/jcb.201605073] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2016] [Accepted: 09/12/2016] [Indexed: 12/22/2022] Open
Abstract
Activation of mast cells through IgE and antigen triggers the release of secretory granules that contain factors responsible for anaphylactic responses. Munoz et al. show that kinesin-1 regulates mast cell degranulation through PI3K-dependent formation of a kinesin-1/Slp3/Rab27b complex. Cross-linking of mast cell (MC) IgE receptors (FcεRI) triggers degranulation of secretory granules (SGs) and the release of many allergic and inflammatory mediators. Although degranulation depends crucially on microtubule dynamics, the molecular machinery that couples SGs to microtubule-dependent transport is poorly understood. In this study, we demonstrate that mice lacking Kif5b (the heavy chain of kinesin-1) in hematopoietic cells are less sensitive to IgE-mediated, passive, systemic anaphylaxis. After IgE-induced stimulation, bone marrow–derived MCs from Kif5b knockout mice exhibited a marked reduction in SG translocation toward the secretion site. In contrast, a lack of Kif5b did not affect cytokine secretion, early FcεRI-initiated signaling pathways, or microtubule reorganization upon FcεRI stimulation. We identified Slp3 as the critical effector linking kinesin-1 to Rab27b-associated SGs. Kinesin-1 recruitment to the Slp3/Rab27b effector complex was independent of microtubule reorganization but occurred only upon stimulation requiring phosphatidylinositol 3-kinase (PI3K) activity. Our findings demonstrate that PI3K-dependent formation of a kinesin-1/Slp3/Rab27b complex is critical for the microtubule-dependent movement of SGs required for MC degranulation.
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Affiliation(s)
- Isabelle Munoz
- Laboratory of Normal and Pathological Homeostasis of the Immune System, Institut National de la Santé et de la Recherche Médicale, UMR1163, F-75015 Paris, France.,Imagine Institute, Paris Descartes University-Sorbonne Paris Cité, F-75015 Paris, France
| | - Luca Danelli
- Institut National de la Santé et de la Recherche Médicale, Unité Mixte de Recherche 1149; Centre de Recherche sur l'Inflammation, Centre National de la Recherche Scientifique, Equipe de Recherche Labelisé 8252; Inflamex Laboratory of Excellence, Université Paris Diderot, Sorbonne Paris Cité, Faculté de Médecine, Site Xavier Bichat, F-75018 Paris, France
| | - Julien Claver
- Institut National de la Santé et de la Recherche Médicale, Unité Mixte de Recherche 1149; Centre de Recherche sur l'Inflammation, Centre National de la Recherche Scientifique, Equipe de Recherche Labelisé 8252; Inflamex Laboratory of Excellence, Université Paris Diderot, Sorbonne Paris Cité, Faculté de Médecine, Site Xavier Bichat, F-75018 Paris, France
| | - Nicolas Goudin
- Cell Imaging Facility, Imagine Institute, Paris Descartes University-Sorbonne Paris Cité, F-75015 Paris, France
| | - Mathieu Kurowska
- Laboratory of Normal and Pathological Homeostasis of the Immune System, Institut National de la Santé et de la Recherche Médicale, UMR1163, F-75015 Paris, France.,Imagine Institute, Paris Descartes University-Sorbonne Paris Cité, F-75015 Paris, France
| | - Iris Karina Madera-Salcedo
- Institut National de la Santé et de la Recherche Médicale, Unité Mixte de Recherche 1149; Centre de Recherche sur l'Inflammation, Centre National de la Recherche Scientifique, Equipe de Recherche Labelisé 8252; Inflamex Laboratory of Excellence, Université Paris Diderot, Sorbonne Paris Cité, Faculté de Médecine, Site Xavier Bichat, F-75018 Paris, France
| | - Jian-Dong Huang
- School of Biomedical Sciences, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong
| | - Alain Fischer
- Laboratory of Normal and Pathological Homeostasis of the Immune System, Institut National de la Santé et de la Recherche Médicale, UMR1163, F-75015 Paris, France.,Imagine Institute, Paris Descartes University-Sorbonne Paris Cité, F-75015 Paris, France.,Immunology and Pediatric Hematology Department, Necker Children's Hospital, Assistance Publique Hôpitaux de Paris, F-75015 Paris, France.,Collège de France, F-75005 Paris, France
| | | | - Geneviéve de Saint Basile
- Laboratory of Normal and Pathological Homeostasis of the Immune System, Institut National de la Santé et de la Recherche Médicale, UMR1163, F-75015 Paris, France.,Imagine Institute, Paris Descartes University-Sorbonne Paris Cité, F-75015 Paris, France
| | - Ulrich Blank
- Institut National de la Santé et de la Recherche Médicale, Unité Mixte de Recherche 1149; Centre de Recherche sur l'Inflammation, Centre National de la Recherche Scientifique, Equipe de Recherche Labelisé 8252; Inflamex Laboratory of Excellence, Université Paris Diderot, Sorbonne Paris Cité, Faculté de Médecine, Site Xavier Bichat, F-75018 Paris, France
| | - Gaël Ménasché
- Laboratory of Normal and Pathological Homeostasis of the Immune System, Institut National de la Santé et de la Recherche Médicale, UMR1163, F-75015 Paris, France .,Imagine Institute, Paris Descartes University-Sorbonne Paris Cité, F-75015 Paris, France
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27
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Pons M, Ali L, Beghdadi W, Danelli L, Alison M, Madjène LC, Calvo J, Claver J, Vibhushan S, Åbrink M, Pejler G, Poli-Mérol ML, Peuchmaur M, El Ghoneimi A, Blank U. Mast Cells and MCPT4 Chymase Promote Renal Impairment after Partial Ureteral Obstruction. Front Immunol 2017; 8:450. [PMID: 28523000 PMCID: PMC5415561 DOI: 10.3389/fimmu.2017.00450] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2016] [Accepted: 03/31/2017] [Indexed: 11/29/2022] Open
Abstract
Obstructive nephropathy constitutes a major cause of pediatric renal progressive disease. The mechanisms leading to disease progression are still poorly understood. Kidney fibrotic lesions are reproduced using a model of partial unilateral ureteral obstruction (pUUO) in newborn mice. Based on data showing significant mast cell (MC) infiltration in patients, we investigated the role of MC and murine MCPT4, a MC-released chymase, in pUUO using MC- (Wsh/sh), MCPT4-deficient (Mcpt4−/−), and wild-type (WT) mice. Measurement of kidney length and volume by magnetic resonance imaging (MRI) as well as postmortem kidney weight revealed hypotrophy of operated right kidneys (RKs) and compensatory hypertrophy of left kidneys. Differences between kidneys were major for WT, minimal for Wsh/sh, and intermediate for Mcpt4−/− mice. Fibrosis development was focal and increased only in WT-obstructed kidneys. No differences were noticed for local inflammatory responses, but serum CCL2 was significantly higher in WT versus Mcpt4−/− and Wsh/sh mice. Alpha-smooth muscle actin (αSMA) expression, a marker of epithelial–mesenchymal transition (EMT), was high in WT, minimal for Wsh/sh, and intermediate for Mcpt4−/− RK. Supernatants of activated MC induced αSMA in co-culture experiments with proximal tubular epithelial cells. Our results support a role of MC in EMT and parenchyma lesions after pUUO involving, at least partly, MCPT4 chymase. They confirm the importance of morphologic impairment evaluation by MRI in pUUO.
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Affiliation(s)
- Maguelonne Pons
- INSERM UMRS 1149, Paris, France.,CNRS ERL8252, Paris, France.,Université Paris Diderot, Sorbonne Paris Cité, Laboratoire d'excellence INFLAMEX, Paris, France.,Department of Pediatric Surgery and Urology, Hôpital Robert Debré, APHP, Université Paris Diderot, Sorbonne Paris Cité, Paris, France
| | - Liza Ali
- INSERM UMRS 1149, Paris, France.,CNRS ERL8252, Paris, France.,Université Paris Diderot, Sorbonne Paris Cité, Laboratoire d'excellence INFLAMEX, Paris, France.,Department of Pediatric Surgery and Urology, Hôpital Robert Debré, APHP, Université Paris Diderot, Sorbonne Paris Cité, Paris, France
| | - Walid Beghdadi
- INSERM UMRS 1149, Paris, France.,CNRS ERL8252, Paris, France.,Université Paris Diderot, Sorbonne Paris Cité, Laboratoire d'excellence INFLAMEX, Paris, France
| | - Luca Danelli
- CNRS ERL8252, Paris, France.,Université Paris Diderot, Sorbonne Paris Cité, Laboratoire d'excellence INFLAMEX, Paris, France
| | - Marianne Alison
- Department of Pediatric Radiology, Hôpital Robert Debré, APHP, Université Paris Diderot, Sorbonne Paris Cité, Paris, France
| | - Lydia Celia Madjène
- INSERM UMRS 1149, Paris, France.,CNRS ERL8252, Paris, France.,Université Paris Diderot, Sorbonne Paris Cité, Laboratoire d'excellence INFLAMEX, Paris, France
| | - Jessica Calvo
- Department of Pathology, Hôpital Robert Debré, APHP, Université Paris Diderot, Sorbonne Paris Cité, Paris, France
| | - Julien Claver
- INSERM UMRS 1149, Paris, France.,CNRS ERL8252, Paris, France.,Université Paris Diderot, Sorbonne Paris Cité, Laboratoire d'excellence INFLAMEX, Paris, France
| | - Shamila Vibhushan
- INSERM UMRS 1149, Paris, France.,CNRS ERL8252, Paris, France.,Université Paris Diderot, Sorbonne Paris Cité, Laboratoire d'excellence INFLAMEX, Paris, France
| | - Magnus Åbrink
- Section of Immunology, Department of Biomedical Sciences and Veterinary Public Health, Swedish University of Agricultural Sciences, Uppsala, Sweden
| | - Gunnar Pejler
- Uppsala University, Department of Medical Biochemistry and Microbiology, Uppsala, Sweden.,Swedish University of Agricultural Sciences, Department of Anatomy, Physiology and Biochemistry, Uppsala, Sweden
| | - Marie-Laurence Poli-Mérol
- Pediatric Surgery Unit, American Memorial Hospital, Université Reims Champagne Ardennes, Reims, France
| | - Michel Peuchmaur
- Department of Pathology, Hôpital Robert Debré, APHP, Université Paris Diderot, Sorbonne Paris Cité, Paris, France
| | - Alaa El Ghoneimi
- INSERM UMRS 1149, Paris, France.,CNRS ERL8252, Paris, France.,Université Paris Diderot, Sorbonne Paris Cité, Laboratoire d'excellence INFLAMEX, Paris, France.,Department of Pediatric Surgery and Urology, Hôpital Robert Debré, APHP, Université Paris Diderot, Sorbonne Paris Cité, Paris, France
| | - Ulrich Blank
- INSERM UMRS 1149, Paris, France.,CNRS ERL8252, Paris, France.,Université Paris Diderot, Sorbonne Paris Cité, Laboratoire d'excellence INFLAMEX, Paris, France
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28
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Tadokoro S, Hirashima N, Utsunomiya-Tate N. Effect of Complexin II on Membrane Fusion between Liposomes Containing Mast Cell SNARE Proteins. Biol Pharm Bull 2016; 39:446-9. [PMID: 26934935 DOI: 10.1248/bpb.b15-00751] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Mast cells are involved in allergic responses and undergo exocytotic release of inflammatory mediators in response to antigen stimulation. Soluble N-ethylmaleimide-sensitive factor attachment protein receptor (SNARE) proteins are involved in this membrane fusion process; some SNARE-binding proteins regulate SNARE-dependent liposome membrane fusion. SNARE-binding protein complexin II is expressed in mast cells, where it positively regulates exocytotic release after antigen stimulation. We found that complexin II suppressed SNARE-dependent membrane fusion between mast cell SNARE-containing liposomes. This inhibitory effect of complexin II was abolished when we used a structurally divergent mutant (R59H) complexin II, where Arg59 is substituted with histidine. These results suggest that complexin II negatively regulates SNARE-dependent exocytotic membrane fusion in mast cells, and this inhibitory effect is dependent upon Arg59.
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29
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Singh J, Shah R, Singh D. Targeting mast cells: Uncovering prolific therapeutic role in myriad diseases. Int Immunopharmacol 2016; 40:362-384. [PMID: 27694038 DOI: 10.1016/j.intimp.2016.09.019] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2016] [Revised: 09/16/2016] [Accepted: 09/22/2016] [Indexed: 01/08/2023]
Abstract
The mast cells are integral part of immune system and they have pleiotropic physiological functions in our body. Any type of abnormal stimuli causes the mast cells receptors to spur the otherwise innocuous mast cells to degranulate and release inflammatory mediators like histamine, cytokines, chemokines and prostaglandins. These mediators are involved in various diseases like allergy, asthma, mastocytosis, cardiovascular disorders, etc. Herein, we describe the receptors involved in degranulation of mast cells and are broadly divided into four categories: G-protein coupled receptors, ligand gated ion channels, immunoreceptors and pattern recognition receptors. Although, activation of pattern recognition receptors do not cause mast cell degranulation, but result in cytokines production. Degranulation itself is a complex process involving cascade of events like membrane fusion events and various proteins like VAMP, Syntaxins, DOCK5, SNAP-23, MARCKS. Furthermore, we described these mast cell receptors antagonists or agonists useful in treatment of myriad diseases. Like, omalizumab anti-IgE antibody is highly effective in asthma, allergic disorders treatment and recently mechanistic insight of IgE uncovered; matrix mettaloprotease inhibitor marimistat is under phase III trial for inflammation, muscular dystrophy diseases; ZPL-389 (H4 receptor antagonist) is in Phase 2a Clinical Trial for atopic dermatitis and psoriasis; JNJ3851868 an oral H4 receptor antagonist is in phase II clinical development for asthma, rheumatoid arthritis. Therefore, research is still in inchoate stage to uncover mast cell biology, mast cell receptors, their therapeutic role in myriad diseases.
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Affiliation(s)
- Jatinder Singh
- Department of Pharmaceutical Sciences and Drug Research, Punjabi University, Patiala 147002, Punjab, India
| | - Ramanpreet Shah
- Department of Pharmaceutical Sciences and Drug Research, Punjabi University, Patiala 147002, Punjab, India
| | - Dhandeep Singh
- Department of Pharmaceutical Sciences and Drug Research, Punjabi University, Patiala 147002, Punjab, India.
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30
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Gaudenzio N, Sibilano R, Marichal T, Starkl P, Reber LL, Cenac N, McNeil BD, Dong X, Hernandez JD, Sagi-Eisenberg R, Hammel I, Roers A, Valitutti S, Tsai M, Espinosa E, Galli SJ. Different activation signals induce distinct mast cell degranulation strategies. J Clin Invest 2016; 126:3981-3998. [PMID: 27643442 DOI: 10.1172/jci85538] [Citation(s) in RCA: 260] [Impact Index Per Article: 32.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2015] [Accepted: 08/12/2016] [Indexed: 01/08/2023] Open
Abstract
Mast cells (MCs) influence intercellular communication during inflammation by secreting cytoplasmic granules that contain diverse mediators. Here, we have demonstrated that MCs decode different activation stimuli into spatially and temporally distinct patterns of granule secretion. Certain signals, including substance P, the complement anaphylatoxins C3a and C5a, and endothelin 1, induced human MCs rapidly to secrete small and relatively spherical granule structures, a pattern consistent with the secretion of individual granules. Conversely, activating MCs with anti-IgE increased the time partition between signaling and secretion, which was associated with a period of sustained elevation of intracellular calcium and formation of larger and more heterogeneously shaped granule structures that underwent prolonged exteriorization. Pharmacological inhibition of IKK-β during IgE-dependent stimulation strongly reduced the time partition between signaling and secretion, inhibited SNAP23/STX4 complex formation, and switched the degranulation pattern into one that resembled degranulation induced by substance P. IgE-dependent and substance P-dependent activation in vivo also induced different patterns of mouse MC degranulation that were associated with distinct local and systemic pathophysiological responses. These findings show that cytoplasmic granule secretion from MCs that occurs in response to different activating stimuli can exhibit distinct dynamics and features that are associated with distinct patterns of MC-dependent inflammation.
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31
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Malmersjö S, Di Palma S, Diao J, Lai Y, Pfuetzner RA, Wang AL, McMahon MA, Hayer A, Porteus M, Bodenmiller B, Brunger AT, Meyer T. Phosphorylation of residues inside the SNARE complex suppresses secretory vesicle fusion. EMBO J 2016; 35:1810-21. [PMID: 27402227 PMCID: PMC5010044 DOI: 10.15252/embj.201694071] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2016] [Accepted: 06/09/2016] [Indexed: 12/22/2022] Open
Abstract
Membrane fusion is essential for eukaryotic life, requiring SNARE proteins to zipper up in an α‐helical bundle to pull two membranes together. Here, we show that vesicle fusion can be suppressed by phosphorylation of core conserved residues inside the SNARE domain. We took a proteomics approach using a PKCB knockout mast cell model and found that the key mast cell secretory protein VAMP8 becomes phosphorylated by PKC at multiple residues in the SNARE domain. Our data suggest that VAMP8 phosphorylation reduces vesicle fusion in vitro and suppresses secretion in living cells, allowing vesicles to dock but preventing fusion with the plasma membrane. Markedly, we show that the phosphorylation motif is absent in all eukaryotic neuronal VAMPs, but present in all other VAMPs. Thus, phosphorylation of SNARE domains is a general mechanism to restrict how much cells secrete, opening the door for new therapeutic strategies for suppression of secretion.
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Affiliation(s)
- Seth Malmersjö
- Department of Chemical and Systems Biology, Stanford University, Stanford, CA, USA
| | - Serena Di Palma
- Institute of Molecular Life Sciences, University of Zurich, Zurich, Switzerland Functional Genomics Center Zurich, ETH Zurich/University of Zurich, Zurich, Switzerland
| | - Jiajie Diao
- Departments of Molecular and Cellular Physiology, Neurology and Neurological Sciences, Photon Science, and Structural Biology, Stanford University, Stanford, CA, USA Howard Hughes Medical Institute, Stanford, CA, USA
| | - Ying Lai
- Departments of Molecular and Cellular Physiology, Neurology and Neurological Sciences, Photon Science, and Structural Biology, Stanford University, Stanford, CA, USA Howard Hughes Medical Institute, Stanford, CA, USA
| | - Richard A Pfuetzner
- Departments of Molecular and Cellular Physiology, Neurology and Neurological Sciences, Photon Science, and Structural Biology, Stanford University, Stanford, CA, USA Howard Hughes Medical Institute, Stanford, CA, USA
| | - Austin L Wang
- Departments of Molecular and Cellular Physiology, Neurology and Neurological Sciences, Photon Science, and Structural Biology, Stanford University, Stanford, CA, USA Howard Hughes Medical Institute, Stanford, CA, USA
| | - Moira A McMahon
- Department of Pediatrics, Stanford University, Stanford, CA, USA
| | - Arnold Hayer
- Department of Chemical and Systems Biology, Stanford University, Stanford, CA, USA
| | - Matthew Porteus
- Department of Pediatrics, Stanford University, Stanford, CA, USA
| | - Bernd Bodenmiller
- Institute of Molecular Life Sciences, University of Zurich, Zurich, Switzerland
| | - Axel T Brunger
- Departments of Molecular and Cellular Physiology, Neurology and Neurological Sciences, Photon Science, and Structural Biology, Stanford University, Stanford, CA, USA Howard Hughes Medical Institute, Stanford, CA, USA
| | - Tobias Meyer
- Department of Chemical and Systems Biology, Stanford University, Stanford, CA, USA
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32
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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.
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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;
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33
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Tadokoro S, Shibata T, Inoh Y, Amano T, Nakanishi M, Hirashima N, Utsunomiya-Tate N. Phosphorylation of syntaxin-3 at Thr 14 negatively regulates exocytosis in RBL-2H3 mast cells. Cell Biol Int 2016; 40:589-96. [PMID: 26936588 DOI: 10.1002/cbin.10600] [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] [Received: 10/13/2015] [Accepted: 02/29/2016] [Indexed: 12/25/2022]
Abstract
Recent studies have revealed that soluble N-ethylmaleimide-sensitive factor attachment protein receptor (SNARE) proteins interact with each other, forming a SNARE complex that induces exocytosis in mast cells. Previously, we reported that syntaxin-3, a SNARE protein, regulates mast cell exocytosis and is constantly phosphorylated. In this study, we tried to identify the amino acid residue that is phosphorylated in mast cells, and to elucidate the regulatory mechanism of exocytosis by phosphorylation in syntaxin-3. We found that Thr 14 of syntaxin-3 was a phosphorylation site in mast cells. In addition, the overexpression of a constitutively dephosphorylated syntaxin-3 (T14A) mutant enhanced mast cell exocytosis. We also showed that the phosphomimetic mutation of syntaxin-3 at Thr 14 (T14E) induced structural changes in syntaxin-3, and this mutation inhibited binding of syntaxin-3 to Munc18-2. These results suggest that phosphorylated syntaxin-3 at Thr 14 negatively regulates mast cell exocytosis by impairing the interaction between syntaxin-3 and Munc18-2.
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Affiliation(s)
- Satoshi Tadokoro
- Faculty of Pharma Sciences, Teikyo University, 2-11-1 Kaga, Itabashi-ku, Tokyo, 173-8605, Japan.,Graduate School of Pharmaceutical Sciences, Nagoya City University, 3-1 Tanabe-dori, Mizuho-ku, Nagoya, 467-8603, Japan
| | - Tetsuhiro Shibata
- Graduate School of Pharmaceutical Sciences, Nagoya City University, 3-1 Tanabe-dori, Mizuho-ku, Nagoya, 467-8603, Japan
| | - Yoshikazu Inoh
- School of Pharmacy, Aichi Gakuin University, 1-100 Kusumoto-cho, Chikusa-ku, Nagoya, 464-8650, Japan
| | - Toshiro Amano
- Faculty of Pharma Sciences, Teikyo University, 2-11-1 Kaga, Itabashi-ku, Tokyo, 173-8605, Japan
| | - Mamoru Nakanishi
- School of Pharmacy, Aichi Gakuin University, 1-100 Kusumoto-cho, Chikusa-ku, Nagoya, 464-8650, Japan
| | - Naohide Hirashima
- Graduate School of Pharmaceutical Sciences, Nagoya City University, 3-1 Tanabe-dori, Mizuho-ku, Nagoya, 467-8603, Japan
| | - Naoko Utsunomiya-Tate
- Faculty of Pharma Sciences, Teikyo University, 2-11-1 Kaga, Itabashi-ku, Tokyo, 173-8605, Japan
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34
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Higashio H, Satoh YI, Saino T. Mast cell degranulation is negatively regulated by the Munc13-4-binding small-guanosine triphosphatase Rab37. Sci Rep 2016; 6:22539. [PMID: 26931073 PMCID: PMC4773767 DOI: 10.1038/srep22539] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2015] [Accepted: 02/17/2016] [Indexed: 02/07/2023] Open
Abstract
Mast cell degranulation is regulated by the small guanosine triphosphatases (GTPases) Rab27a and Rab27b, which have distinct and opposing roles: Rab27b acts as a positive regulator through its effector protein Munc13-4, a non-neuronal isoform of the vesicle-priming Munc13 family of proteins, whereas Rab27a acts as a negative regulator through its effector protein melanophilin, by maintaining integrity of cortical filamentous actin (F-actin), a barrier to degranulation. Here we investigated the role of Rab37, one of the Rab GTPases assumed to be implicated in regulated secretion during mast cell degranulation. Using the RBL-2H3 mast cell line, we detected Rab37 on the secretory granules and found that antigen-induced degranulation was extensively increased by either knockdown of Rab37 or overexpression of a dominant-active Rab37 mutant. This hypersecretion phenotype in the Rab37-knockdown cells was suppressed by simultaneous knockdown of Rab27a and Rab27b or of Munc13-4, but not by disruption of cortical F-actin. We further found that Rab37 interacted with Munc13-4 in a GTP-independent manner and formed a Rab27-Munc13-4-Rab37 complex. These results suggest that Rab37 is a Munc13-4-binding protein that inhibits mast cell degranulation through its effector protein, by counteracting the vesicle-priming activity of the Rab27-Munc13-4 system.
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Affiliation(s)
- Hironori Higashio
- Department of Chemistry, Center for Liberal Arts and Sciences, 2-1-1 Nishitokuta, Yahaba, Iwate 028-3694, Japan
| | - Yoh-ichi Satoh
- Division of Cell Biology, Department of Anatomy, 2-1-1 Nishitokuta, Yahaba, Iwate 028-3694, Japan.,Department of Medical Education, Iwate Medical University, 2-1-1 Nishitokuta, Yahaba, Iwate 028-3694, Japan
| | - Tomoyuki Saino
- Division of Cell Biology, Department of Anatomy, 2-1-1 Nishitokuta, Yahaba, Iwate 028-3694, Japan
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35
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Efergan A, Azouz NP, Klein O, Noguchi K, Rothenberg ME, Fukuda M, Sagi-Eisenberg R. Rab12 Regulates Retrograde Transport of Mast Cell Secretory Granules by Interacting with the RILP-Dynein Complex. THE JOURNAL OF IMMUNOLOGY 2016; 196:1091-101. [PMID: 26740112 DOI: 10.4049/jimmunol.1500731] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/30/2015] [Accepted: 11/20/2015] [Indexed: 12/19/2022]
Abstract
Secretory granule (SG) transport is a critical step in regulated exocytosis including degranulation of activated mast cells. The latter process results in the release of multiple inflammatory mediators that play key roles in innate immunity, as well as in allergic responses. In this study, we identified the small GTPase Rab12 as a novel regulator of mast cell SG transport, and we provide mechanistic insights into its mode of action. We show that Rab12 is activated in a stimulus-dependent fashion and promotes microtubule-dependent retrograde transport of the SGs in the activated cells. We also show that this minus end transport of the SGs is mediated by the RILP-dynein complex and identify RILP as a novel effector of Rab12. Finally, we show that Rab12 negatively regulates mast cell degranulation. Taken together, our results identify Rab12 as a novel regulator of mast cell responses and disclose for the first time, to our knowledge, the mechanism of retrograde transport of the mast cell SGs.
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Affiliation(s)
- Adi Efergan
- Department of Cell and Developmental Biology, Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv 69978, Israel
| | - Nurit P Azouz
- Department of Cell and Developmental Biology, Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv 69978, Israel
| | - Ofir Klein
- Department of Cell and Developmental Biology, Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv 69978, Israel
| | - Kenta Noguchi
- Laboratory of Membrane Trafficking Mechanisms, Department of Developmental Biology and Neurosciences, Graduate School of Life Sciences, Tohoku University, Aobayama, Aoba-ku, Sendai, Miyagi 980-8578, Japan; and
| | - Marc E Rothenberg
- Division of Allergy and Immunology, Cincinnati Children's Hospital Medical Center, University of Cincinnati, Cincinnati, OH 45229
| | - Mitsunori Fukuda
- Laboratory of Membrane Trafficking Mechanisms, Department of Developmental Biology and Neurosciences, Graduate School of Life Sciences, Tohoku University, Aobayama, Aoba-ku, Sendai, Miyagi 980-8578, Japan; and
| | - Ronit Sagi-Eisenberg
- Department of Cell and Developmental Biology, Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv 69978, Israel;
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36
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Intrinsic defects in erythroid cells from familial hemophagocytic lymphohistiocytosis type 5 patients identify a role for STXBP2/Munc18-2 in erythropoiesis and phospholipid scrambling. Exp Hematol 2015; 43:1072-1076.e2. [DOI: 10.1016/j.exphem.2015.08.007] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2015] [Revised: 08/19/2015] [Accepted: 08/20/2015] [Indexed: 11/17/2022]
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37
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Dieckmann NMG, Hackmann Y, Aricò M, Griffiths GM. Munc18-2 is required for Syntaxin 11 Localization on the Plasma Membrane in Cytotoxic T-Lymphocytes. Traffic 2015; 16:1330-41. [PMID: 26771955 PMCID: PMC4791091 DOI: 10.1111/tra.12337] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2015] [Revised: 09/21/2015] [Accepted: 09/21/2015] [Indexed: 12/31/2022]
Abstract
Cytotoxic T‐lymphocytes (CTL) kill their targets by cytolytic granule secretion at the immunological synapse. The Sec/Munc protein, Munc18‐2, and its binding partner Syntaxin 11 (STX11) are both required for granule secretion, with mutations in either leading to the primary immunodeficiency, Familial Haemophagocytic Lymphohistiocytosis (FHL4 and 5). Understanding how Munc18‐2 and STX11 function in CTL has been hampered by not knowing the endogenous localization of these proteins. Using a novel FHL5 Munc18‐2 mutation that results in loss of protein, cytotoxicity and degranulation together with CTL from an FHL4 patient lacking STX11, enabled us to localize endogenous STX11 and Munc18‐2 in CTL. Munc18‐2 localized predominantly to cytolytic granules with low levels associated with the plasma membrane where STX11 localized. Importantly, while Munc18‐2 localization is unaffected by the absence of STX11 in FHL4 CTL, STX11 is lost from the plasma membrane in FHL5 CTL lacking Munc18‐2. These findings support a role for Munc18‐2 in chaperoning STX11 to the plasma membrane where the final fusion events involved in secretion occur.
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Affiliation(s)
- Nele M G Dieckmann
- Cambridge Institute for Medical Research, Cambridge Biomedical Campus, University of Cambridge, Cambridge, CB2 0XY, United Kingdom
| | - Yvonne Hackmann
- Cambridge Institute for Medical Research, Cambridge Biomedical Campus, University of Cambridge, Cambridge, CB2 0XY, United Kingdom.,Current address: Biochemistry Center, Heidelberg University, Heidelberg, Germany
| | - Maurizio Aricò
- Azienda Sanitaria Provinciale 7, Piazza Igea 1, I-97100, Ragusa, Italy
| | - Gillian M Griffiths
- Cambridge Institute for Medical Research, Cambridge Biomedical Campus, University of Cambridge, Cambridge, CB2 0XY, United Kingdom
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38
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Xu H, Arnold MG, Kumar SV. Differential Effects of Munc18s on Multiple Degranulation-Relevant Trans-SNARE Complexes. PLoS One 2015; 10:e0138683. [PMID: 26384026 PMCID: PMC4575180 DOI: 10.1371/journal.pone.0138683] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2015] [Accepted: 09/02/2015] [Indexed: 11/24/2022] Open
Abstract
Mast cell exocytosis, which includes compound degranulation and vesicle-associated piecemeal degranulation, requires multiple Q- and R- SNAREs. It is not clear how these SNAREs pair to form functional trans-SNARE complexes and how these trans-SNARE complexes are selectively regulated for fusion. Here we undertake a comprehensive examination of the capacity of two Q-SNARE subcomplexes (syntaxin3/SNAP-23 and syntaxin4/SNAP-23) to form fusogenic trans-SNARE complexes with each of the four granule-borne R-SNAREs (VAMP2, 3, 7, 8). We report the identification of at least six distinct trans-SNARE complexes under enhanced tethering conditions: i) VAMP2/syntaxin3/SNAP-23, ii) VAMP2/syntaxin4/SNAP-23, iii) VAMP3/syntaxin3/SNAP-23, iv) VAMP3/syntaxin4/SNAP-23, v) VAMP8/syntaxin3/SNAP-23, and vi) VAMP8/syntaxin4/SNAP-23. We show for the first time that Munc18a operates synergistically with SNAP-23-based non-neuronal SNARE complexes (i to iv) in lipid mixing, in contrast to Munc18b and c, which exhibit no positive effect on any SNARE combination tested. Pre-incubation with Munc18a renders the SNARE-dependent fusion reactions insensitive to the otherwise inhibitory R-SNARE cytoplasmic domains, suggesting a protective role of Munc18a for its cognate SNAREs. Our findings substantiate the recently discovered but unexpected requirement for Munc18a in mast cell exocytosis, and implicate post-translational modifications in Munc18b/c activation.
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Affiliation(s)
- Hao Xu
- Department of Biological Sciences, University of Southern Mississippi, Hattiesburg, Mississippi, United States of America
- * E-mail:
| | - Matthew Grant Arnold
- Department of Biological Sciences, University of Southern Mississippi, Hattiesburg, Mississippi, United States of America
| | - Sushmitha Vijay Kumar
- Department of Biological Sciences, University of Southern Mississippi, Hattiesburg, Mississippi, United States of America
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Tadokoro S, Inoh Y, Nakanishi M, Hirashima N. Effects of PIP2 on membrane fusion between mast cell SNARE liposomes mediated by synaptotagmin 2. BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2015; 1848:2290-4. [PMID: 26095717 DOI: 10.1016/j.bbamem.2015.06.016] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/05/2015] [Revised: 06/13/2015] [Accepted: 06/15/2015] [Indexed: 12/30/2022]
Abstract
Recent studies have revealed that SNARE proteins are involved in exocytotic release in mast cells. Previously, we reported that mast cell SNARE proteins induce membrane fusion between liposomes. Moreover, we found that synaptotagmin 2, a candidate Ca2+ sensor for mast cell exocytosis, enhanced SNARE-mediated membrane fusion via Ca2+ and phosphatidylserine. Phosphatidylinositol 4,5-bisphosphate (PIP2) is an acidic phospholipid like phosphatidylserine. In the present study, we investigated whether PIP2 is involved in the enhancement effect of synaptotagmin 2 on SNARE-mediated membrane fusion. PIP2 did not show any significant effect on SNARE-mediated membrane fusion by itself. In the presence of Ca2+, synaptotagmin 2 enhanced SNARE-mediated membrane fusion between liposomes containing PIP2. However, even in the presence of Ca2+, when we used 100% PC liposomes, synaptotagmin 2 did not show any significant effect on SNARE-mediated membrane fusion. These results indicated that PIP2 is involved in the enhancement effect of synaptotagmin 2 on membrane fusion between liposomes containing mast cell SNARE proteins.
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Affiliation(s)
- Satoshi Tadokoro
- Graduate School of Pharmaceutical Sciences, Nagoya City University, 3-1 Tanabe-dori, Mizuho-ku, Nagoya 467-8603, Japan
| | - Yoshikazu Inoh
- School of Pharmacy, Aichi Gakuin University, 1-100 Kusumoto-cho, Chikusa-ku, Nagoya 464-8650, Japan
| | - Mamoru Nakanishi
- School of Pharmacy, Aichi Gakuin University, 1-100 Kusumoto-cho, Chikusa-ku, Nagoya 464-8650, Japan
| | - Naohide Hirashima
- Graduate School of Pharmaceutical Sciences, Nagoya City University, 3-1 Tanabe-dori, Mizuho-ku, Nagoya 467-8603, Japan.
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Bin NR, Jung CH, Kim B, Chandrasegram P, Turlova E, Zhu D, Gaisano HY, Sun HS, Sugita S. Chaperoning of closed syntaxin-3 through Lys46 and Glu59 in domain 1 of Munc18 proteins is indispensable for mast cell exocytosis. J Cell Sci 2015; 128:1946-60. [PMID: 25795302 DOI: 10.1242/jcs.165662] [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: 11/04/2014] [Accepted: 03/16/2015] [Indexed: 11/20/2022] Open
Abstract
Understanding how Munc18 proteins govern exocytosis is crucial because mutations of this protein cause severe secretion deficits in neuronal and immune cells. Munc18-2 has indispensable roles in the degranulation of mast cell, partly by binding and chaperoning a subset of syntaxin isoforms. However, the key syntaxin that, crucially, participates in the degranulation – whose levels and intracellular localization are regulated by Munc18-2 – remains unknown. Here, we demonstrate that double knockdown of Munc18-1 and Munc-2 in mast cells results in greatly reduced degranulation accompanied with strikingly compromised expression levels and localization of syntaxin-3. This phenotype is fully rescued by wild-type Munc18 proteins but not by the K46E, E59K and K46E/E59K mutants of Munc-18 domain 1, each of which exhibits completely abolished binding to 'closed' syntaxin-3. Furthermore, knockdown of syntaxin-3 strongly impairs degranulation. Collectively, our data argue that residues Lys46 and Glu59 of Munc18 proteins are indispensable for mediating the interaction between Munc18 and closed syntaxin-3, which is essential for degranulation by chaperoning syntaxin-3. Our results also indicate that the functional contribution of these residues differs between immune cell degranulation and neuronal secretion.
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Affiliation(s)
- Na-Ryum Bin
- Division of Fundamental Neurobiology, Toronto Western Research Institute, University Health Network, Krembil Discovery Tower, Toronto, ON M5T 2S8, Canada Department of Physiology, University of Toronto, Toronto, ON M5S 1A8, Canada
| | - Chang Hun Jung
- Division of Fundamental Neurobiology, Toronto Western Research Institute, University Health Network, Krembil Discovery Tower, Toronto, ON M5T 2S8, Canada Department of Physiology, University of Toronto, Toronto, ON M5S 1A8, Canada
| | - Byungjin Kim
- Division of Fundamental Neurobiology, Toronto Western Research Institute, University Health Network, Krembil Discovery Tower, Toronto, ON M5T 2S8, Canada
| | - Prashanth Chandrasegram
- Division of Fundamental Neurobiology, Toronto Western Research Institute, University Health Network, Krembil Discovery Tower, Toronto, ON M5T 2S8, Canada
| | - Ekaterina Turlova
- Department of Physiology, University of Toronto, Toronto, ON M5S 1A8, Canada Department of Surgery, University of Toronto, Toronto, ON M5S 1A8, Canada
| | - Dan Zhu
- Department of Physiology, University of Toronto, Toronto, ON M5S 1A8, Canada Department of Medicine, University of Toronto, Toronto, ON M5S 1A8, Canada
| | - Herbert Y Gaisano
- Division of Fundamental Neurobiology, Toronto Western Research Institute, University Health Network, Krembil Discovery Tower, Toronto, ON M5T 2S8, Canada Department of Physiology, University of Toronto, Toronto, ON M5S 1A8, Canada Department of Medicine, University of Toronto, Toronto, ON M5S 1A8, Canada
| | - Hong-Shuo Sun
- Department of Physiology, University of Toronto, Toronto, ON M5S 1A8, Canada Department of Surgery, University of Toronto, Toronto, ON M5S 1A8, Canada
| | - Shuzo Sugita
- Division of Fundamental Neurobiology, Toronto Western Research Institute, University Health Network, Krembil Discovery Tower, Toronto, ON M5T 2S8, Canada Department of Physiology, University of Toronto, Toronto, ON M5S 1A8, Canada
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Abstract
CONTEXT Most syndromes with benign primary excess of a hormone show positive coupling of hormone secretion to size or proliferation in the affected hormone secretory tissue. Syndromes that lack this coupling seem rare and have not been examined for unifying features among each other. EVIDENCE ACQUISITION Selected clinical and basic features were analyzed from original reports and reviews. We examined indices of excess secretion of a hormone and indices of size of secretory tissue within the following three syndromes, each suggestive of uncoupling between these two indices: familial hypocalciuric hypercalcemia, congenital diazoxide-resistant hyperinsulinism, and congenital primary hyperaldosteronism type III (with G151E mutation of the KCNJ5 gene). EVIDENCE SYNTHESIS Some unifying features among the three syndromes were different from features present among common tumors secreting the same hormone. The unifying and distinguishing features included: 1) expression of hormone excess as early as the first days of life; 2) normal size of tissue that oversecretes a hormone; 3) diffuse histologic expression in the hormonal tissue; 4) resistance to treatment by subtotal ablation of the hormone-secreting tissue; 5) causation by a germline mutation; 6) low potential of the same mutation to cause a tumor by somatic mutation; and 7) expression of the mutated molecule in a pathway between sensing of a serum metabolite and secretion of hormone regulating that metabolite. CONCLUSION Some shared clinical and basic features of uncoupling of secretion from size in a hormonal tissue characterize three uncommon states of hormone excess. These features differ importantly from features of common hormonal neoplasm of that tissue.
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Affiliation(s)
- Stephen J Marx
- Genetics and Endocrinology Section, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, Maryland 20892
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Blank U, Madera-Salcedo IK, Danelli L, Claver J, Tiwari N, Sánchez-Miranda E, Vázquez-Victorio G, Ramírez-Valadez KA, Macias-Silva M, González-Espinosa C. Vesicular trafficking and signaling for cytokine and chemokine secretion in mast cells. Front Immunol 2014; 5:453. [PMID: 25295038 PMCID: PMC4170139 DOI: 10.3389/fimmu.2014.00453] [Citation(s) in RCA: 89] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2014] [Accepted: 09/05/2014] [Indexed: 12/31/2022] Open
Abstract
Upon activation mast cells (MCs) secrete numerous inflammatory compounds stored in their cytoplasmic secretory granules by a process called anaphylactic degranulation, which is responsible for type I hypersensitivity responses. Prestored mediators include histamine and MC proteases but also some cytokines and growth factors making them available within minutes for a maximal biological effect. Degranulation is followed by the de novo synthesis of lipid mediators such as prostaglandins and leukotrienes as well as a vast array of cytokines, chemokines, and growth factors, which are responsible for late phase inflammatory responses. While lipid mediators diffuse freely out of the cell through lipid bilayers, both anaphylactic degranulation and secretion of cytokines, chemokines, and growth factors depends on highly regulated vesicular trafficking steps that occur along the secretory pathway starting with the translocation of proteins to the endoplasmic reticulum. Vesicular trafficking in MCs also intersects with endocytic routes, notably to form specialized cytoplasmic granules called secretory lysosomes. Some of the mediators like histamine reach granules via specific vesicular monoamine transporters directly from the cytoplasm. In this review, we try to summarize the available data on granule biogenesis and signaling events that coordinate the complex steps that lead to the release of the inflammatory mediators from the various vesicular carriers in MCs.
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Affiliation(s)
- Ulrich Blank
- INSERM UMRS 1149 , Paris , France ; CNRS ERL8252 , Paris , France ; Université Paris Diderot, Sorbonne Paris Cité, Laboratoire d'excellence INFLAMEX , Paris , France
| | - Iris Karina Madera-Salcedo
- INSERM UMRS 1149 , Paris , France ; CNRS ERL8252 , Paris , France ; Université Paris Diderot, Sorbonne Paris Cité, Laboratoire d'excellence INFLAMEX , Paris , France
| | - Luca Danelli
- INSERM UMRS 1149 , Paris , France ; CNRS ERL8252 , Paris , France ; Université Paris Diderot, Sorbonne Paris Cité, Laboratoire d'excellence INFLAMEX , Paris , France
| | - Julien Claver
- INSERM UMRS 1149 , Paris , France ; CNRS ERL8252 , Paris , France ; Université Paris Diderot, Sorbonne Paris Cité, Laboratoire d'excellence INFLAMEX , Paris , France
| | - Neeraj Tiwari
- INSERM UMRS 1149 , Paris , France ; CNRS ERL8252 , Paris , France ; Université Paris Diderot, Sorbonne Paris Cité, Laboratoire d'excellence INFLAMEX , Paris , France
| | | | - Genaro Vázquez-Victorio
- Instituto de Fisiología Celular, Universidad Nacional Autónoma de México , México City , México
| | | | - Marina Macias-Silva
- Instituto de Fisiología Celular, Universidad Nacional Autónoma de México , México City , México
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Azouz NP, Hammel I, Sagi-Eisenberg R. Characterization of mast cell secretory granules and their cell biology. DNA Cell Biol 2014; 33:647-51. [PMID: 24988214 DOI: 10.1089/dna.2014.2543] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023] Open
Abstract
Exocytosis and secretion of secretory granule (SG) contained inflammatory mediators is the primary mechanism by which mast cells exert their protective immune responses in host defense, as well as their pathological functions in allergic reactions and anaphylaxis. Despite their central role in mast cell function, the molecular mechanisms underlying the biogenesis and secretion of mast cell SGs remain largely unresolved. Early studies have established the lysosomal nature of the mast cell SGs and implicated SG homotypic fusion as an important step occurring during both their biogenesis and compound secretion. However, the molecular mechanisms that account for key features of this process largely remain to be defined. A novel high-resolution imaging based methodology allowed us to screen Rab GTPases for their phenotypic and functional impact and identify Rab networks that regulate mast cell secretion. This screen has identified Rab5 as a novel regulator of homotypic fusion of the mast cell SGs that thereby regulates their size and cargo composition.
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Affiliation(s)
- Nurit Pereg Azouz
- 1 Department of Cell and Developmental Biology, Sackler Faculty of Medicine, Tel Aviv University , Tel Aviv, Israel
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Azouz NP, Zur N, Efergan A, Ohbayashi N, Fukuda M, Amihai D, Hammel I, Rothenberg ME, Sagi-Eisenberg R. Rab5 Is a Novel Regulator of Mast Cell Secretory Granules: Impact on Size, Cargo, and Exocytosis. THE JOURNAL OF IMMUNOLOGY 2014; 192:4043-53. [DOI: 10.4049/jimmunol.1302196] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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