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Tchen J, Simon Q, Chapart L, Thaminy MK, Vibhushan S, Saveanu L, Lamri Y, Saidoune F, Pacreau E, Pellefigues C, Bex-Coudrat J, Karasuyama H, Miyake K, Hidalgo J, Fallon PG, Papo T, Blank U, Benhamou M, Hanouna G, Sacre K, Daugas E, Charles N. PD-L1- and IL-4-expressing basophils promote pathogenic accumulation of T follicular helper cells in lupus. Nat Commun 2024; 15:3389. [PMID: 38649353 PMCID: PMC11035650 DOI: 10.1038/s41467-024-47691-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2023] [Accepted: 04/04/2024] [Indexed: 04/25/2024] Open
Abstract
Systemic lupus erythematosus (SLE) is an autoimmune disease characterized by anti-nuclear autoantibodies whose production is promoted by autoreactive T follicular helper (TFH) cells. During SLE pathogenesis, basophils accumulate in secondary lymphoid organs (SLO), amplify autoantibody production and disease progression through mechanisms that remain to be defined. Here, we provide evidence for a direct functional relationship between TFH cells and basophils during lupus pathogenesis, both in humans and mice. PD-L1 upregulation on basophils and IL-4 production are associated with TFH and TFH2 cell expansions and with disease activity. Pathogenic TFH cell accumulation, maintenance, and function in SLO were dependent on PD-L1 and IL-4 in basophils, which induced a transcriptional program allowing TFH2 cell differentiation and function. Our study establishes a direct mechanistic link between basophils and TFH cells in SLE that promotes autoantibody production and lupus nephritis.
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Affiliation(s)
- John Tchen
- Université Paris Cité, Centre de Recherche sur l'Inflammation, INSERM UMR1149, CNRS EMR8252, Faculté de Médecine site Bichat, 75018, Paris, France
- Université Paris Cité, Laboratoire d'Excellence Inflamex, 75018, Paris, France
| | - Quentin Simon
- Université Paris Cité, Centre de Recherche sur l'Inflammation, INSERM UMR1149, CNRS EMR8252, Faculté de Médecine site Bichat, 75018, Paris, France
- Université Paris Cité, Laboratoire d'Excellence Inflamex, 75018, Paris, France
- Inovarion, 75005, Paris, France
| | - Léa Chapart
- Université Paris Cité, Centre de Recherche sur l'Inflammation, INSERM UMR1149, CNRS EMR8252, Faculté de Médecine site Bichat, 75018, Paris, France
- Université Paris Cité, Laboratoire d'Excellence Inflamex, 75018, Paris, France
| | - Morgane K Thaminy
- Université Paris Cité, Centre de Recherche sur l'Inflammation, INSERM UMR1149, CNRS EMR8252, Faculté de Médecine site Bichat, 75018, Paris, France
- Université Paris Cité, Laboratoire d'Excellence Inflamex, 75018, Paris, France
| | - Shamila Vibhushan
- Université Paris Cité, Centre de Recherche sur l'Inflammation, INSERM UMR1149, CNRS EMR8252, Faculté de Médecine site Bichat, 75018, Paris, France
- Université Paris Cité, Laboratoire d'Excellence Inflamex, 75018, Paris, France
| | - Loredana Saveanu
- Université Paris Cité, Centre de Recherche sur l'Inflammation, INSERM UMR1149, CNRS EMR8252, Faculté de Médecine site Bichat, 75018, Paris, France
- Université Paris Cité, Laboratoire d'Excellence Inflamex, 75018, Paris, France
| | - Yasmine Lamri
- Université Paris Cité, Centre de Recherche sur l'Inflammation, INSERM UMR1149, CNRS EMR8252, Faculté de Médecine site Bichat, 75018, Paris, France
- Université Paris Cité, Laboratoire d'Excellence Inflamex, 75018, Paris, France
| | - Fanny Saidoune
- Université Paris Cité, Centre de Recherche sur l'Inflammation, INSERM UMR1149, CNRS EMR8252, Faculté de Médecine site Bichat, 75018, Paris, France
- Université Paris Cité, Laboratoire d'Excellence Inflamex, 75018, Paris, France
| | - Emeline Pacreau
- Université Paris Cité, Centre de Recherche sur l'Inflammation, INSERM UMR1149, CNRS EMR8252, Faculté de Médecine site Bichat, 75018, Paris, France
- Université Paris Cité, Laboratoire d'Excellence Inflamex, 75018, Paris, France
| | - Christophe Pellefigues
- Université Paris Cité, Centre de Recherche sur l'Inflammation, INSERM UMR1149, CNRS EMR8252, Faculté de Médecine site Bichat, 75018, Paris, France
- Université Paris Cité, Laboratoire d'Excellence Inflamex, 75018, Paris, France
| | - Julie Bex-Coudrat
- Université Paris Cité, Centre de Recherche sur l'Inflammation, INSERM UMR1149, CNRS EMR8252, Faculté de Médecine site Bichat, 75018, Paris, France
- Université Paris Cité, Laboratoire d'Excellence Inflamex, 75018, Paris, France
| | - Hajime Karasuyama
- Inflammation, Infection and Immunity Laboratory, TMDU Advanced Research Institute, Tokyo Medical and Dental University (TMDU), Tokyo, Japan
| | - Kensuke Miyake
- Inflammation, Infection and Immunity Laboratory, TMDU Advanced Research Institute, Tokyo Medical and Dental University (TMDU), Tokyo, Japan
| | - Juan Hidalgo
- Universidad Autonoma de Barcelona, Facultad de Biociencias, Unidad de Fisiologia Animal Bellaterra, Bellaterra Campus, 08193, Barcelona, Spain
| | | | - Thomas Papo
- Université Paris Cité, Centre de Recherche sur l'Inflammation, INSERM UMR1149, CNRS EMR8252, Faculté de Médecine site Bichat, 75018, Paris, France
- Université Paris Cité, Laboratoire d'Excellence Inflamex, 75018, Paris, France
- Service de Médecine Interne, Hôpital Bichat, Assistance Publique - Hôpitaux de Paris, 75018, Paris, France
| | - Ulrich Blank
- Université Paris Cité, Centre de Recherche sur l'Inflammation, INSERM UMR1149, CNRS EMR8252, Faculté de Médecine site Bichat, 75018, Paris, France
- Université Paris Cité, Laboratoire d'Excellence Inflamex, 75018, Paris, France
| | - Marc Benhamou
- Université Paris Cité, Centre de Recherche sur l'Inflammation, INSERM UMR1149, CNRS EMR8252, Faculté de Médecine site Bichat, 75018, Paris, France
- Université Paris Cité, Laboratoire d'Excellence Inflamex, 75018, Paris, France
| | - Guillaume Hanouna
- Université Paris Cité, Centre de Recherche sur l'Inflammation, INSERM UMR1149, CNRS EMR8252, Faculté de Médecine site Bichat, 75018, Paris, France
- Université Paris Cité, Laboratoire d'Excellence Inflamex, 75018, Paris, France
- Service de Néphrologie, Hôpital Bichat, Assistance Publique - Hôpitaux de Paris, 75018, Paris, France
| | - Karim Sacre
- Université Paris Cité, Centre de Recherche sur l'Inflammation, INSERM UMR1149, CNRS EMR8252, Faculté de Médecine site Bichat, 75018, Paris, France
- Université Paris Cité, Laboratoire d'Excellence Inflamex, 75018, Paris, France
- Service de Médecine Interne, Hôpital Bichat, Assistance Publique - Hôpitaux de Paris, 75018, Paris, France
| | - Eric Daugas
- Université Paris Cité, Centre de Recherche sur l'Inflammation, INSERM UMR1149, CNRS EMR8252, Faculté de Médecine site Bichat, 75018, Paris, France
- Université Paris Cité, Laboratoire d'Excellence Inflamex, 75018, Paris, France
- Service de Néphrologie, Hôpital Bichat, Assistance Publique - Hôpitaux de Paris, 75018, Paris, France
| | - Nicolas Charles
- Université Paris Cité, Centre de Recherche sur l'Inflammation, INSERM UMR1149, CNRS EMR8252, Faculté de Médecine site Bichat, 75018, Paris, France.
- Université Paris Cité, Laboratoire d'Excellence Inflamex, 75018, Paris, France.
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2
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Gratio V, Dayot S, Benadda S, Nicole P, Saveanu L, Voisin T, Couvineau A. Imaging flow cytometry of tumoroids: A new method for studying GPCR expression. Cytometry A 2024; 105:276-287. [PMID: 38017661 DOI: 10.1002/cyto.a.24809] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2023] [Revised: 10/11/2023] [Accepted: 11/13/2023] [Indexed: 11/30/2023]
Abstract
Fluorescence confocal microscopy is commonly used to analyze the regulation membrane proteins expression such as G protein-coupled receptors (GPCRs). With this approach, the internal movement of GPCRs within the cell can be observed with a high degree of resolution. However, these microscopy techniques led to complex and time-consuming analysis and did not allow a large population of events to be sampled. A recent approach termed imaging flow cytometry (IFC), which combines flow cytometry and fluorescence microscopy, had two main advantages to study the regulation of GPCRs expression such as orexins receptors (OXRs): the ability (1) to analyze large numbers of cells and; (2) to visualize cell integrity and fluorescent markers localization. Here, we compare these two technologies using the orexin A (OxA) ligand coupled to rhodamine (OxA-rho) to investigate anti-tumoral OX1R expression in human digestive cancers. IFC has been adapted for cancer epithelial adherent cells and also to 3D cell culture tumoroids which partially mimic tumoral structures. In the absence of specific antibody, expression of OX1R is examined in the presence of OxA-rho. 2D-culture of colon cancer cells HT-29 exhibits a maximum level of OX1R internalization induced by OxA with 19% ± 3% colocalizing to early endosomes. In 3D-culture of HT-29 cells, internalization of OX1R/OxA-rho reached its maximum at 60 min, with 30.7% ± 6.4% of OX1R colocalizing with early endosomes. This is the first application of IFC to the analysis of the expression of a native GPCR, OX1R, in both 2D and 3D cultures of adherent cancer cells.
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Affiliation(s)
- V Gratio
- INSERM UMR1149/Inflammation Research Center (CRI), Université Paris Cité, Team "From Inflammation to Cancer in Digestive Diseases (INDiD)", DHU UNITY, Paris, France
- INSERM UMR1149/Inflammation Research Center (CRI), Université Paris Cité, Flow Cytometry Platform (CytoCRI), DHU UNITY, Paris, France
| | - S Dayot
- INSERM UMR1149/Inflammation Research Center (CRI), Université Paris Cité, Team "From Inflammation to Cancer in Digestive Diseases (INDiD)", DHU UNITY, Paris, France
| | - S Benadda
- INSERM UMR1149/Inflammation Research Center (CRI), Université Paris Cité, Photonic Imaging Platform (IMA'CRI), DHU UNITY, Paris, France
| | - P Nicole
- INSERM UMR1149/Inflammation Research Center (CRI), Université Paris Cité, Team "From Inflammation to Cancer in Digestive Diseases (INDiD)", DHU UNITY, Paris, France
| | - L Saveanu
- INSERM UMR1149/Inflammation Research Center (CRI), Université Paris Cité, Team "Antigen Presentation by Dendritic Cells to T cells (APreT)", DHU UNITY, Paris, France
| | - T Voisin
- INSERM UMR1149/Inflammation Research Center (CRI), Université Paris Cité, Team "From Inflammation to Cancer in Digestive Diseases (INDiD)", DHU UNITY, Paris, France
| | - A Couvineau
- INSERM UMR1149/Inflammation Research Center (CRI), Université Paris Cité, Team "From Inflammation to Cancer in Digestive Diseases (INDiD)", DHU UNITY, Paris, France
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Gleeson PJ, Benech N, Chemouny J, Metallinou E, Berthelot L, da Silva J, Bex-Coudrat J, Boedec E, Canesi F, Bounaix C, Morelle W, Moya-Nilges M, Kenny J, O'Mahony L, Saveanu L, Arnulf B, Sannier A, Daugas E, Vrtovsnik F, Lepage P, Sokol H, Monteiro RC. The gut microbiota posttranslationally modifies IgA1 in autoimmune glomerulonephritis. Sci Transl Med 2024; 16:eadl6149. [PMID: 38536935 DOI: 10.1126/scitranslmed.adl6149] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2023] [Accepted: 03/01/2024] [Indexed: 04/05/2024]
Abstract
Mechanisms underlying the disruption of self-tolerance in acquired autoimmunity remain unclear. Immunoglobulin A (IgA) nephropathy is an acquired autoimmune disease where deglycosylated IgA1 (IgA subclass 1) auto-antigens are recognized by IgG auto-antibodies, forming immune complexes that are deposited in the kidneys, leading to glomerulonephritis. In the intestinal microbiota of patients with IgA nephropathy, there was increased relative abundance of mucin-degrading bacteria, including Akkermansia muciniphila. IgA1 was deglycosylated by A. muciniphila both in vitro and in the intestinal lumen of mice. This generated neo-epitopes that were recognized by autoreactive IgG from the sera of patients with IgA nephropathy. Mice expressing human IgA1 and the human Fc α receptor I (α1KI-CD89tg) that underwent intestinal colonization by A. muciniphila developed an aggravated IgA nephropathy phenotype. After deglycosylation of IgA1 by A. muciniphila in the mouse gut lumen, IgA1 crossed the intestinal epithelium into the circulation by retrotranscytosis and became deposited in the glomeruli of mouse kidneys. Human α-defensins-a risk locus for IgA nephropathy-inhibited growth of A. muciniphila in vitro. A negative correlation observed between stool concentration of α-defensin 6 and quantity of A. muciniphila in the guts of control participants was lost in patients with IgA nephropathy. This study demonstrates that gut microbiota dysbiosis contributes to generation of auto-antigens in patients with IgA nephropathy and in a mouse model of this disease.
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Affiliation(s)
- Patrick J Gleeson
- Université Paris Cité, INSERM UMR1149 and CNRS EMR8252, Centre de Recherche sur l'Inflammation, Inflamex Laboratory of Excellence, Paris 75018, France
- Department of Medicine, School of Microbiology, APC Microbiome Ireland, University College Cork, Cork T12 Y337 Ireland
- AP-HP, Nord/université de Paris, hôpital Bichat-Claude Bernard, Service de Néphrologie, Paris 75018, France
| | - Nicolas Benech
- Sorbonne Université, INSERM, Centre de Recherche Saint-Antoine, CRSA, AP-HP, Saint Antoine Hospital, Gastroenterology Department, Paris 75012, France
- Paris Center for Microbiome Medicine (PaCeMM) FHU, Paris 75012, France
- Hospices Civils de Lyon, Claude Bernard Lyon 1 University, CRCL, 69003 Lyon, France
| | - Jonathan Chemouny
- Université Paris Cité, INSERM UMR1149 and CNRS EMR8252, Centre de Recherche sur l'Inflammation, Inflamex Laboratory of Excellence, Paris 75018, France
- Université Paris-Saclay, INRAE, AgroParisTech, Micalis Institute, 78350 Jouy-en-Josas, France
| | - Eleftheria Metallinou
- Université Paris Cité, INSERM UMR1149 and CNRS EMR8252, Centre de Recherche sur l'Inflammation, Inflamex Laboratory of Excellence, Paris 75018, France
| | - Laureline Berthelot
- Université Paris Cité, INSERM UMR1149 and CNRS EMR8252, Centre de Recherche sur l'Inflammation, Inflamex Laboratory of Excellence, Paris 75018, France
| | - Jennifer da Silva
- Université Paris Cité, INSERM UMR1149 and CNRS EMR8252, Centre de Recherche sur l'Inflammation, Inflamex Laboratory of Excellence, Paris 75018, France
| | - Julie Bex-Coudrat
- Université Paris Cité, INSERM UMR1149 and CNRS EMR8252, Centre de Recherche sur l'Inflammation, Inflamex Laboratory of Excellence, Paris 75018, France
| | - Erwan Boedec
- Université Paris Cité, INSERM UMR1149 and CNRS EMR8252, Centre de Recherche sur l'Inflammation, Inflamex Laboratory of Excellence, Paris 75018, France
| | - Fanny Canesi
- Université Paris Cité, INSERM UMR1149 and CNRS EMR8252, Centre de Recherche sur l'Inflammation, Inflamex Laboratory of Excellence, Paris 75018, France
| | - Carine Bounaix
- Université Paris Cité, INSERM UMR1149 and CNRS EMR8252, Centre de Recherche sur l'Inflammation, Inflamex Laboratory of Excellence, Paris 75018, France
| | - Willy Morelle
- Université Lille, Centre National de la Recherche Française, UMR 8576-Unité de Glycobiologie Structurale et Fonctionnelle-Unité de Glycobiologie Structurale et Fonctionnelle, F-59000 Lille, France
| | - Maryse Moya-Nilges
- Unité Technologie et Service Bioimagerie Ultrastructurale (UTechS UBI), Institut Pasteur, 28 Rue Du Docteur Roux, 75015 Paris, France
| | - John Kenny
- Teagasc Food Research Centre, Moorepark, Fermoy, Co. Cork P61 C996 Ireland
- APC Microbiome Ireland, University College Cork, College Road, Cork, T12 YT20 Ireland
| | - Liam O'Mahony
- Department of Medicine, School of Microbiology, APC Microbiome Ireland, University College Cork, Cork T12 Y337 Ireland
| | - Loredana Saveanu
- Université Paris Cité, INSERM UMR1149 and CNRS EMR8252, Centre de Recherche sur l'Inflammation, Inflamex Laboratory of Excellence, Paris 75018, France
| | - Bertrand Arnulf
- AP-HP, Nord/université de Paris, hôpital Saint Louis, Service d'Immuno-Hématologie, Myosotis 4, 75010 Paris, France
| | - Aurélie Sannier
- AP-HP, Nord/université de Paris, hôpital Bichat-Claude Bernard, Service d'Anatomie-Pathologique, 75018 Paris, France
| | - Eric Daugas
- Université Paris Cité, INSERM UMR1149 and CNRS EMR8252, Centre de Recherche sur l'Inflammation, Inflamex Laboratory of Excellence, Paris 75018, France
- AP-HP, Nord/université de Paris, hôpital Bichat-Claude Bernard, Service de Néphrologie, Paris 75018, France
| | - François Vrtovsnik
- Université Paris Cité, INSERM UMR1149 and CNRS EMR8252, Centre de Recherche sur l'Inflammation, Inflamex Laboratory of Excellence, Paris 75018, France
- AP-HP, Nord/université de Paris, hôpital Bichat-Claude Bernard, Service de Néphrologie, Paris 75018, France
| | - Patricia Lepage
- Université Paris-Saclay, INRAE, AgroParisTech, Micalis Institute, 78350 Jouy-en-Josas, France
| | - Harry Sokol
- Sorbonne Université, INSERM, Centre de Recherche Saint-Antoine, CRSA, AP-HP, Saint Antoine Hospital, Gastroenterology Department, Paris 75012, France
- Paris Center for Microbiome Medicine (PaCeMM) FHU, Paris 75012, France
- Université Paris-Saclay, INRAE, AgroParisTech, Micalis Institute, 78350 Jouy-en-Josas, France
| | - Renato C Monteiro
- Université Paris Cité, INSERM UMR1149 and CNRS EMR8252, Centre de Recherche sur l'Inflammation, Inflamex Laboratory of Excellence, Paris 75018, France
- AP-HP, Nord/université de Paris, hôpital Bichat-Claude Bernard, Service d'Immunologie, 75018 Paris, France
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Benadda S, Nugue M, Koumantou D, Bens M, De Luca M, Pellé O, Monteiro RC, Evnouchidou I, Saveanu L. Activating FcγR function depends on endosomal-signaling platforms. iScience 2023; 26:107055. [PMID: 37360697 PMCID: PMC10285637 DOI: 10.1016/j.isci.2023.107055] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2022] [Revised: 04/02/2023] [Accepted: 06/01/2023] [Indexed: 06/28/2023] Open
Abstract
Cell surface receptor internalization can either terminate signaling or activate alternative endosomal signaling pathways. We investigated here whether endosomal signaling is involved in the function of the human receptors for Fc immunoglobulin fragments (FcRs): FcαRI, FcγRIIA, and FcγRI. All these receptors were internalized after their cross-linking with receptor-specific antibodies, but their intracellular trafficking was different. FcαRI was targeted directly to lysosomes, while FcγRIIA and FcγRI were internalized in particular endosomal compartments described by the insulin esponsive minoeptidase (IRAP), where they recruited signaling molecules, such as the active form of the kinase Syk, PLCγ and the adaptor LAT. Destabilization of FcγR endosomal signaling in the absence of IRAP compromised cytokine secretion downstream FcγR activation and macrophage ability to kill tumor cells by antibody-dependent cell-mediated cytotoxicity (ADCC). Our results indicate that FcγR endosomal signaling is required for the FcγR-driven inflammatory reaction and possibly for the therapeutic action of monoclonal antibodies.
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Affiliation(s)
- Samira Benadda
- INSERM U1149, CRI, Centre de Recherche sur l'Inflammation, Paris, France
- CNRS ERL8252, Paris, France
- Université de Paris, Site Xavier Bichat, Paris, France
- Inflamex Laboratory of Excellence, Paris, France
| | - Mathilde Nugue
- INSERM U1149, CRI, Centre de Recherche sur l'Inflammation, Paris, France
- CNRS ERL8252, Paris, France
- Université de Paris, Site Xavier Bichat, Paris, France
- Inflamex Laboratory of Excellence, Paris, France
| | - Despoina Koumantou
- INSERM U1149, CRI, Centre de Recherche sur l'Inflammation, Paris, France
- CNRS ERL8252, Paris, France
- Université de Paris, Site Xavier Bichat, Paris, France
- Inflamex Laboratory of Excellence, Paris, France
| | - Marcelle Bens
- INSERM U1149, CRI, Centre de Recherche sur l'Inflammation, Paris, France
- CNRS ERL8252, Paris, France
- Université de Paris, Site Xavier Bichat, Paris, France
- Inflamex Laboratory of Excellence, Paris, France
| | - Mariacristina De Luca
- INSERM U1149, CRI, Centre de Recherche sur l'Inflammation, Paris, France
- CNRS ERL8252, Paris, France
- Université de Paris, Site Xavier Bichat, Paris, France
- Inflamex Laboratory of Excellence, Paris, France
| | - Olivier Pellé
- INSERM UMR 1163, Cell Sorting Facility, Paris, France
- INSERM UMR 1163, Laboratoire of Immunogenetics of Pediatric Autoimmunity, Paris, France
| | - Renato C. Monteiro
- INSERM U1149, CRI, Centre de Recherche sur l'Inflammation, Paris, France
- CNRS ERL8252, Paris, France
- Université de Paris, Site Xavier Bichat, Paris, France
- Inflamex Laboratory of Excellence, Paris, France
| | - Irini Evnouchidou
- INSERM U1149, CRI, Centre de Recherche sur l'Inflammation, Paris, France
- CNRS ERL8252, Paris, France
- Université de Paris, Site Xavier Bichat, Paris, France
- Inflamex Laboratory of Excellence, Paris, France
- Inovarion, Paris, France
| | - Loredana Saveanu
- INSERM U1149, CRI, Centre de Recherche sur l'Inflammation, Paris, France
- CNRS ERL8252, Paris, France
- Université de Paris, Site Xavier Bichat, Paris, France
- Inflamex Laboratory of Excellence, Paris, France
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5
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Evnouchidou I, Koumantou D, Nugue M, Saveanu L. M1-aminopeptidase family - beyond antigen-trimming activities. Curr Opin Immunol 2023; 83:102337. [PMID: 37216842 DOI: 10.1016/j.coi.2023.102337] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2022] [Revised: 04/07/2023] [Accepted: 04/11/2023] [Indexed: 05/24/2023]
Abstract
Antigen (Ag)-trimming aminopeptidases belong to the oxytocinase subfamily of M1 metallopeptidases. In humans, this subfamily contains the endoplasmic reticulum aminopeptidases 1 and 2 (ERAP1 and 2) and the insulin-responsive aminopeptidase (IRAP, synonym oxytocinase), an endosomal enzyme. The ability of these enzymes to trim antigenic precursors and to generate major histocompatibility class-I ligands has been demonstrated extensively for ERAP1, less for ERAP2, which is absent in rodents, and exclusively in the context of cross-presentation for IRAP. During 20 years of research on these aminopeptidases, their enzymatic function has been very well characterized and their genetic association with autoimmune diseases, cancers, and infections is well established. The mechanisms by which these proteins are associated to human diseases are not always clear. This review discusses the Ag-trimming-independent functions of the oxytocinase subfamily of M1 aminopeptidases and the new questions raised by recent publications on IRAP and ERAP2.
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Affiliation(s)
- Irini Evnouchidou
- INSERM U1149, CRI, Centre de Recherche sur l'Inflammation, Paris, France; CNRS ERL8252, Paris, France; Université de Paris, Site Xavier Bichat, Paris, France; Inflamex Laboratory of Excellence, Paris, France; Inovarion, Paris, France
| | - Despoina Koumantou
- INSERM U1149, CRI, Centre de Recherche sur l'Inflammation, Paris, France; CNRS ERL8252, Paris, France; Université de Paris, Site Xavier Bichat, Paris, France; Inflamex Laboratory of Excellence, Paris, France
| | - Mathilde Nugue
- INSERM U1149, CRI, Centre de Recherche sur l'Inflammation, Paris, France; CNRS ERL8252, Paris, France; Université de Paris, Site Xavier Bichat, Paris, France; Inflamex Laboratory of Excellence, Paris, France
| | - Loredana Saveanu
- INSERM U1149, CRI, Centre de Recherche sur l'Inflammation, Paris, France; CNRS ERL8252, Paris, France; Université de Paris, Site Xavier Bichat, Paris, France; Inflamex Laboratory of Excellence, Paris, France.
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6
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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] [What about the content of this article? (0)] [Affiliation(s)] [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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7
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Evnouchidou I, Caillens V, Koumantou D, Saveanu L. The role of endocytic trafficking in antigen T Cell Receptor activation. Biomed J 2021; 45:310-320. [PMID: 34592497 PMCID: PMC9250096 DOI: 10.1016/j.bj.2021.09.004] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2021] [Revised: 09/19/2021] [Accepted: 09/22/2021] [Indexed: 12/14/2022] Open
Abstract
Antigen T cell receptors (TCR) recognize antigenic peptides displayed by the major histocompatibility complex (pMHC) and play a critical role in T cell activation. The levels of TCR complexes at the cell surface, where signaling is initiated, depend on the balance between TCR synthesis, recycling and degradation. Cell surface TCR interaction with pMHC leads to receptor clustering and formation of a tight T cell-APC contact, the immune synapse, from which the activated TCR is internalized. While TCR internalization from the immune synapse has been initially considered to arrest TCR signaling, recent evidence support the hypothesis that the internalized receptor continues to signal from specialized endosomes. Here, we review the molecular mechanisms of TCR endocytosis and recycling, both in steady state and after T cell activation. We then discuss the experimental evidence in favor of endosomal TCR signaling and its possible consequences on T cell activation.
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Affiliation(s)
- Irini Evnouchidou
- Université de Paris, Centre de Recherche sur L'inflammation, INSERM U1149, CNRS ERL8252, Paris, France; Inovarion, Paris, France.
| | - Vivien Caillens
- Université de Paris, Centre de Recherche sur L'inflammation, INSERM U1149, CNRS ERL8252, Paris, France; Inovarion, Paris, France
| | - Despoina Koumantou
- Université de Paris, Centre de Recherche sur L'inflammation, INSERM U1149, CNRS ERL8252, Paris, France; Inovarion, Paris, France
| | - Loredana Saveanu
- Université de Paris, Centre de Recherche sur L'inflammation, INSERM U1149, CNRS ERL8252, Paris, France; Inovarion, Paris, France.
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8
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Wan J, Weiss E, Ben Mkaddem S, Mabire M, Choinier PM, Picq O, Thibault-Sogorb T, Hegde P, Pishvaie D, Bens M, Broer L, Gilgenkrantz H, Moreau R, Saveanu L, Codogno P, Monteiro RC, Lotersztajn S. LC3-associated phagocytosis protects against inflammation and liver fibrosis via immunoreceptor inhibitory signaling. Sci Transl Med 2021; 12:12/539/eaaw8523. [PMID: 32295902 DOI: 10.1126/scitranslmed.aaw8523] [Citation(s) in RCA: 41] [Impact Index Per Article: 13.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2019] [Revised: 10/11/2019] [Accepted: 02/09/2020] [Indexed: 12/15/2022]
Abstract
Sustained hepatic and systemic inflammation, particularly originating from monocytes/macrophages, is a driving force for fibrosis progression to end-stage cirrhosis and underlies the development of multiorgan failure. Reprogramming monocyte/macrophage phenotype has emerged as a strategy to limit inflammation during chronic liver injury. Here, we report that LC3-associated phagocytosis (LAP), a noncanonical form of autophagy, protects against hepatic and systemic inflammation during chronic liver injury in rodents, with beneficial antifibrogenic effects. LAP is enhanced in blood and liver monocytes from patients with fibrosis and cirrhosis. Pharmacological inhibition of LAP components in human monocytes from patients with cirrhosis or genetic disruption of LAP in mice with chronic liver injury exacerbates both the inflammatory signature in isolated human monocytes and the hepatic inflammatory profile in mice, resulting in enhanced liver fibrosis. Mechanistically, patients with cirrhosis showed increased monocyte expression of Fc fragment of IgG receptor IIA (FcγRIIA) and enhanced engulfment of immunoglobulin G in LC3+ phagosomes that triggers an FcγRIIA/Src homology region 2 domain-containing phosphatase-1 (SHP-1) inhibitory immunoreceptor tyrosine-based activation motif (ITAMi) anti-inflammatory pathway. Mice overexpressing human FcγRIIA in myeloid cells show enhanced LAP in response to chronic liver injury and resistance to inflammation and liver fibrosis. Activation of LAP is lost in monocytes from patients with multiorgan failure and restored by specifically targeting ITAMi signaling with anti-FcγRIIA F(ab')2 fragments, or with intravenous immunoglobulin (IVIg). These data suggest the existence of an ITAMi-mediated mechanism by which LAP might protect against inflammation. Sustaining LAP may open therapeutic perspectives for patients with chronic liver disease.
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Affiliation(s)
- JingHong Wan
- Université de Paris, Centre de Recherche sur l'Inflammation (CRI), INSERM, U1149, CNRS, ERL 8252, F-75018 Paris, France
| | - Emmanuel Weiss
- Université de Paris, Centre de Recherche sur l'Inflammation (CRI), INSERM, U1149, CNRS, ERL 8252, F-75018 Paris, France.,Department of Anesthesiology and Critical Care, Hôpital Beaujon, Assistance Publique-Hôpitaux de Paris, F-92110 Clichy, France
| | - Sanae Ben Mkaddem
- Université de Paris, Centre de Recherche sur l'Inflammation (CRI), INSERM, U1149, CNRS, ERL 8252, F-75018 Paris, France
| | - Morgane Mabire
- Université de Paris, Centre de Recherche sur l'Inflammation (CRI), INSERM, U1149, CNRS, ERL 8252, F-75018 Paris, France
| | - Pierre-Marie Choinier
- Université de Paris, Centre de Recherche sur l'Inflammation (CRI), INSERM, U1149, CNRS, ERL 8252, F-75018 Paris, France.,Department of Anesthesiology and Critical Care, Hôpital Beaujon, Assistance Publique-Hôpitaux de Paris, F-92110 Clichy, France
| | - Olivia Picq
- Université de Paris, Centre de Recherche sur l'Inflammation (CRI), INSERM, U1149, CNRS, ERL 8252, F-75018 Paris, France.,Department of Anesthesiology and Critical Care, Hôpital Beaujon, Assistance Publique-Hôpitaux de Paris, F-92110 Clichy, France
| | - Tristan Thibault-Sogorb
- Université de Paris, Centre de Recherche sur l'Inflammation (CRI), INSERM, U1149, CNRS, ERL 8252, F-75018 Paris, France.,Department of Anesthesiology and Critical Care, Hôpital Beaujon, Assistance Publique-Hôpitaux de Paris, F-92110 Clichy, France
| | - Pushpa Hegde
- Université de Paris, Centre de Recherche sur l'Inflammation (CRI), INSERM, U1149, CNRS, ERL 8252, F-75018 Paris, France
| | - Dorsa Pishvaie
- Department of Hepatology, Hôpital Beaujon, Assistance Publique-Hôpitaux de Paris, F-92110, Clichy, France
| | - Marcelle Bens
- Université de Paris, Centre de Recherche sur l'Inflammation (CRI), INSERM, U1149, CNRS, ERL 8252, F-75018 Paris, France
| | - Linda Broer
- Université de Paris, Centre de Recherche sur l'Inflammation (CRI), INSERM, U1149, CNRS, ERL 8252, F-75018 Paris, France
| | - Hélène Gilgenkrantz
- Université de Paris, Centre de Recherche sur l'Inflammation (CRI), INSERM, U1149, CNRS, ERL 8252, F-75018 Paris, France
| | - Richard Moreau
- Université de Paris, Centre de Recherche sur l'Inflammation (CRI), INSERM, U1149, CNRS, ERL 8252, F-75018 Paris, France.,Department of Hepatology, Hôpital Beaujon, Assistance Publique-Hôpitaux de Paris, F-92110, Clichy, France
| | - Loredana Saveanu
- Université de Paris, Centre de Recherche sur l'Inflammation (CRI), INSERM, U1149, CNRS, ERL 8252, F-75018 Paris, France
| | - Patrice Codogno
- Université de Paris Institut Necker-Enfants malades (INEM), INSERM, U1151, CNRS UMR8223, F-75015 Paris, France
| | - Renato C Monteiro
- Université de Paris, Centre de Recherche sur l'Inflammation (CRI), INSERM, U1149, CNRS, ERL 8252, F-75018 Paris, France
| | - Sophie Lotersztajn
- Université de Paris, Centre de Recherche sur l'Inflammation (CRI), INSERM, U1149, CNRS, ERL 8252, F-75018 Paris, France.
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9
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Weimershaus M, Mauvais FX, Evnouchidou I, Lawand M, Saveanu L, van Endert P. IRAP Endosomes Control Phagosomal Maturation in Dendritic Cells. Front Cell Dev Biol 2020; 8:585713. [PMID: 33425891 PMCID: PMC7793786 DOI: 10.3389/fcell.2020.585713] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2020] [Accepted: 11/04/2020] [Indexed: 01/08/2023] Open
Abstract
Dendritic cells (DCs) contribute to the immune surveillance by sampling their environment through phagocytosis and endocytosis. We have previously reported that, rapidly following uptake of extracellular antigen into phagosomes or endosomes in DCs, a specialized population of storage endosomes marked by Rab14 and insulin-regulated aminopeptidase (IRAP) is recruited to the nascent antigen-containing compartment, thereby regulating its maturation and ultimately antigen cross-presentation to CD8+ T lymphocytes. Here, using IRAP–/– DCs, we explored how IRAP modulates phagosome maturation dynamics and cross-presentation. We find that in the absence of IRAP, phagosomes acquire more rapidly late endosomal markers, are more degradative, and show increased microbicidal activity. We also report evidence for a role of vesicle trafficking from the endoplasmic reticulum (ER)–Golgi intermediate compartment to endosomes for the formation or stability of the IRAP compartment. Moreover, we dissect the dual role of IRAP as a trimming peptidase and a critical constituent of endosome stability. Experiments using a protease-dead IRAP mutant and pharmacological IRAP inhibition suggest that IRAP expression but not proteolytic activity is required for the formation of storage endosomes and for DC-typical phagosome maturation, whereas proteolysis is required for fully efficient cross-presentation. These findings identify IRAP as a key factor in cross-presentation, trimming peptides to fit the major histocompatibility complex class-I binding site while preventing their destruction through premature phagosome maturation.
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Affiliation(s)
- Mirjana Weimershaus
- Institut National de la Santé et de la Recherche Médicale, Unité 1151, Université de Paris, Centre National de la Recherche Scientifique, UMR 8253, Paris, France
| | - François-Xavier Mauvais
- Institut National de la Santé et de la Recherche Médicale, Unité 1151, Université de Paris, Centre National de la Recherche Scientifique, UMR 8253, Paris, France
| | - Irini Evnouchidou
- Institut National de la Santé et de la Recherche Médicale, Unité 1151, Université de Paris, Centre National de la Recherche Scientifique, UMR 8253, Paris, France.,Inovarion, Paris, France
| | - Myriam Lawand
- Institut National de la Santé et de la Recherche Médicale, Unité 1151, Université de Paris, Centre National de la Recherche Scientifique, UMR 8253, Paris, France
| | - Loredana Saveanu
- Institut National de la Santé et de la Recherche Médicale, Unité 1151, Université de Paris, Centre National de la Recherche Scientifique, UMR 8253, Paris, France
| | - Peter van Endert
- Institut National de la Santé et de la Recherche Médicale, Unité 1151, Université de Paris, Centre National de la Recherche Scientifique, UMR 8253, Paris, France
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10
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Evnouchidou I, Nugue M, Saveanu L. [Endosomal signaling by the TCR ζ chain is required for T lymphocyte survival in secondary lymphoid organs]. Med Sci (Paris) 2020; 36:1213-1215. [PMID: 33296640 DOI: 10.1051/medsci/2020235] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Irini Evnouchidou
- Université de Paris, Centre de recherche sur l'inflammation, Inserm U1149, 16 rue Henri-Huchard, 75018 Paris, France - Inovarion, 251 rue Saint-Jacques, 75005 Paris, France
| | - Mathilde Nugue
- Université de Paris, Centre de recherche sur l'inflammation, Inserm U1149, 16 rue Henri-Huchard, 75018 Paris, France
| | - Loredana Saveanu
- Université de Paris, Centre de recherche sur l'inflammation, Inserm U1149, 16 rue Henri-Huchard, 75018 Paris, France
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11
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Descamps D, Evnouchidou I, Caillens V, Drajac C, Riffault S, van Endert P, Saveanu L. The Role of Insulin Regulated Aminopeptidase in Endocytic Trafficking and Receptor Signaling in Immune Cells. Front Mol Biosci 2020; 7:583556. [PMID: 33195428 PMCID: PMC7606930 DOI: 10.3389/fmolb.2020.583556] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2020] [Accepted: 09/25/2020] [Indexed: 12/15/2022] Open
Abstract
Insulin regulated aminopeptidase (IRAP) is a type II transmembrane protein with broad tissue distribution initially identified as a major component of Glut4 storage vesicles (GSV) in adipocytes. Despite its almost ubiquitous expression, IRAP had been extensively studied mainly in insulin responsive cells, such as adipocytes and muscle cells. In these cells, the enzyme displays a complex intracellular trafficking pattern regulated by insulin. Early studies using fusion proteins joining the IRAP cytosolic domain to various reporter proteins, such as GFP or the transferrin receptor (TfR), showed that the complex and regulated trafficking of the protein depends on its cytosolic domain. This domain contains several motifs involved in IRAP trafficking, as demonstrated by mutagenesis studies. Also, proteomic studies and yeast two-hybrid experiments showed that the IRAP cytosolic domain engages in multiple protein interactions with cytoskeleton components and vesicular trafficking adaptors. These findings led to the hypothesis that IRAP is not only a cargo of GSV but might be a part of the sorting machinery that controls GSV dynamics. Recent work in adipocytes, immune cells, and neurons confirmed this hypothesis and demonstrated that IRAP has a dual function. Its carboxy-terminal domain located inside endosomes is responsible for the aminopeptidase activity of the enzyme, while its amino-terminal domain located in the cytosol functions as an endosomal trafficking adaptor. In this review, we recapitulate the published protein interactions of IRAP and summarize the increasing body of evidence indicating that IRAP plays a role in intracellular trafficking of several proteins. We describe the impact of IRAP deletion or depletion on endocytic trafficking and the consequences on immune cell functions. These include the ability of dendritic cells to cross-present antigens and prime adaptive immune responses, as well as the control of innate and adaptive immune receptor signaling and modulation of inflammatory responses.
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Affiliation(s)
| | - Irini Evnouchidou
- Université de Paris, Centre de recherche sur l'inflammation, INSERM U1149, CNRS ERL8252, Paris, France.,Inovarion, Paris, France
| | - Vivien Caillens
- Université de Paris, Centre de recherche sur l'inflammation, INSERM U1149, CNRS ERL8252, Paris, France
| | - Carole Drajac
- Université Paris-Saclay, INRAE, UVSQ, VIM, Jou-en-Josas, France
| | - Sabine Riffault
- Université Paris-Saclay, INRAE, UVSQ, VIM, Jou-en-Josas, France
| | - Peter van Endert
- Université de Paris, Centre de recherche sur l'inflammation, INSERM U1149, CNRS ERL8252, Paris, France.,Université de Paris, INSERM Unité 1151, CNRS UMR 8253, Paris, France.,Service d'immunologie biologique, AP-HP, Hôpital Necker, Paris, France
| | - Loredana Saveanu
- Université de Paris, Centre de recherche sur l'inflammation, INSERM U1149, CNRS ERL8252, Paris, France
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12
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Wan J, Weiss E, Ben Mkaddem S, Mabire M, Choinier PM, Thibault-Sogorb T, Hegde P, Bens M, Broer L, Gilgenkrantz H, Moreau R, Saveanu L, Codogno P, Monteiro RC, Lotersztajn S. LC3-associated phagocytosis in myeloid cells, a fireman that restrains inflammation and liver fibrosis, via immunoreceptor inhibitory signaling. Autophagy 2020; 16:1526-1528. [PMID: 32434445 DOI: 10.1080/15548627.2020.1770979] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022] Open
Abstract
Control of systemic and hepatic inflammation, in particular originating from monocytes/macrophages, is crucial to prevent liver fibrosis and its progression to end-stage cirrhosis. LC3-associated phagocytosis (LAP) is a non-canonical form of autophagy that shifts the monocyte/macrophage phenotype to an anti-inflammatory phenotype. In a recent study, we uncovered LAP as a protective mechanism against inflammation-driven liver fibrosis and systemic inflammation in the context of cirrhosis. We observed that LAP is enhanced in blood and liver monocytes from patients with liver fibrosis or those who progress to cirrhosis. Combining studies in which LAP was pharmacologically or genetically inactivated, we found that LAP limits inflammation in monocytes from cirrhotic patients, and the hepatic inflammatory profile in mice with chronic liver injury, resulting in anti-fibrogenic effects. Mechanistically, LAP-induced anti-inflammatory and antifibrogenic signaling results from enhanced expression of the Fc immunoreceptor FCGR2A/FcγRIIA and activation of an FCGR2A-mediated PTPN6/SHP-1 anti-inflammatory pathway, leading to increased engulfment of IgG into LC3 + phagosomes. In patients with cirrhosis progressing to multi-organ failure (acute-on chronic liver failure), LAP is lost in monocytes, and can be restored by targeting FCGR2A-mediated PTPN6/SHP-1 signaling. These data suggest that sustaining LAP may open novel therapeutic perspectives for patients with end-stage liver disease.
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Affiliation(s)
- JingHong Wan
- Centre de Recherche Sur l'Inflammation (CRI), INSERM, Université de Paris , Paris, France
| | - Emmanuel Weiss
- Centre de Recherche Sur l'Inflammation (CRI), INSERM, Université de Paris , Paris, France.,Department of Anesthesiology and Critical Care, Hôpital Beaujon, Assistance Publique-Hôpitaux de Paris , Clichy, France
| | - Sanae Ben Mkaddem
- Centre de Recherche Sur l'Inflammation (CRI), INSERM, Université de Paris , Paris, France
| | - Morgane Mabire
- Centre de Recherche Sur l'Inflammation (CRI), INSERM, Université de Paris , Paris, France
| | - Pierre-Marie Choinier
- Centre de Recherche Sur l'Inflammation (CRI), INSERM, Université de Paris , Paris, France.,Department of Anesthesiology and Critical Care, Hôpital Beaujon, Assistance Publique-Hôpitaux de Paris , Clichy, France
| | - Tristan Thibault-Sogorb
- Centre de Recherche Sur l'Inflammation (CRI), INSERM, Université de Paris , Paris, France.,Department of Anesthesiology and Critical Care, Hôpital Beaujon, Assistance Publique-Hôpitaux de Paris , Clichy, France
| | - Pushpa Hegde
- Centre de Recherche Sur l'Inflammation (CRI), INSERM, Université de Paris , Paris, France
| | - Marcelle Bens
- Centre de Recherche Sur l'Inflammation (CRI), INSERM, Université de Paris , Paris, France
| | - Linda Broer
- Centre de Recherche Sur l'Inflammation (CRI), INSERM, Université de Paris , Paris, France
| | - Hélène Gilgenkrantz
- Centre de Recherche Sur l'Inflammation (CRI), INSERM, Université de Paris , Paris, France
| | - Richard Moreau
- Centre de Recherche Sur l'Inflammation (CRI), INSERM, Université de Paris , Paris, France.,Department of Hepatology, Hôpital Beaujon, Assistance Publique-Hôpitaux de Paris , Clichy, France
| | - Loredana Saveanu
- Centre de Recherche Sur l'Inflammation (CRI), INSERM, Université de Paris , Paris, France
| | - Patrice Codogno
- Institut Necker-Enfants Malades (INEM), INSERM, Université de Paris , Paris, France
| | - Renato C Monteiro
- Centre de Recherche Sur l'Inflammation (CRI), INSERM, Université de Paris , Paris, France
| | - Sophie Lotersztajn
- Centre de Recherche Sur l'Inflammation (CRI), INSERM, Université de Paris , Paris, France
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13
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Saveanu L, Zucchetti AE, Evnouchidou I, Ardouin L, Hivroz C. Is there a place and role for endocyticTCRsignaling? Immunol Rev 2019; 291:57-74. [DOI: 10.1111/imr.12764] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2019] [Accepted: 04/02/2019] [Indexed: 12/20/2022]
Affiliation(s)
- Loredana Saveanu
- National French Institute of Health and Medical Research (INSERM) 1149 Center of Research on Inflammation Paris France
- National French Center of Scientific Research (CNRS) ERL8252 Paris France
- Laboratory of Inflamex Excellency Faculty of Medicine Xavier Bichat Site Paris France
- Paris Diderot UniversitySorbonne Paris Cité Paris France
| | - Andres E. Zucchetti
- Institut Curie PSL Research UniversityINSERMU932 “Integrative analysis of T cell activation” team Paris France
| | - Irini Evnouchidou
- National French Institute of Health and Medical Research (INSERM) 1149 Center of Research on Inflammation Paris France
- National French Center of Scientific Research (CNRS) ERL8252 Paris France
- Laboratory of Inflamex Excellency Faculty of Medicine Xavier Bichat Site Paris France
- Paris Diderot UniversitySorbonne Paris Cité Paris France
- Inovarion Paris France
| | - Laurence Ardouin
- Institut Curie PSL Research UniversityINSERMU932 “Integrative analysis of T cell activation” team Paris France
| | - Claire Hivroz
- Institut Curie PSL Research UniversityINSERMU932 “Integrative analysis of T cell activation” team Paris France
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14
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Abstract
Phosphoinositide-3 kinases (PI3Ks) generate 3-phosphorylated phosphoinositide lipids that are implicated in many biological processes in homeostatic states and pathologies such as cancer, inflammation and autoimmunity. Eight isoforms of PI3K exist in mammals and among them the class I PI3K, p110γ, and PI3Kδ, and class III Vps34 being the most expressed and well characterized in immune cells. Following engagement of pathogen recognition receptors (PRRs), PI3Ks coordinate vital cellular processes of signaling and vesicular trafficking in innate phagocytes such as macrophages and professional antigen presenting dendritic cells (DCs). Although previous studies demonstrated the involvement of PI3K isoforms in innate and adaptive immune cell types, the role of PI3Ks with respect to DC biology has been enigmatic. Thus, this review, based on studies involving PI3K isoforms, highlight how the different PI3Ks isoforms could regulate DC functions such as antigen processing and presentation including PRR responses.
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Affiliation(s)
- Ezra Aksoy
- Centre for Biochemical Pharmacology, William Harvey Research Institute, Bart's and the London School of Medicine Queen Mary University of London, London, United Kingdom
| | - Loredana Saveanu
- Institut National de la Santé et de la Recherche Médicale, Unité UMR 1149, Centre de Recherche sur l'Inflammation, Paris, France
- Université Paris Diderot, Faculté de Médecine Xavier Bichat, Paris, France
| | - Bénédicte Manoury
- Institut Necker Enfants Malades, Institut National de la Santé et de la Recherche Médicale, Unité 1151, Paris, France
- Centre National de la Recherche Scientifique, Unité 8253, Paris, France
- Université Paris Descartes, Sorbonne Paris Cité, Faculté de Médecine Paris Descartes, Paris, France
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15
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Weimershaus M, Mauvais FX, Saveanu L, Adiko C, Babdor J, Abramova A, Montealegre S, Lawand M, Evnouchidou I, Huber KJ, Chadt A, Zwick M, Vargas P, Dussiot M, Lennon-Dumenil AM, Brocker T, Al-Hasani H, van Endert P. Innate Immune Signals Induce Anterograde Endosome Transport Promoting MHC Class I Cross-Presentation. Cell Rep 2018; 24:3568-3581. [DOI: 10.1016/j.celrep.2018.08.041] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2017] [Revised: 06/14/2018] [Accepted: 08/15/2018] [Indexed: 12/22/2022] Open
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16
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Cadierno MP, Saveanu L, Dreon MS, Martín PR, Heras H. Biosynthesis in the Albumen Gland-Capsule Gland Complex Limits Reproductive Effort in the Invasive Apple Snail Pomacea canaliculata. Biol Bull 2018; 235:1-11. [PMID: 30160995 DOI: 10.1086/699200] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
High fecundity often contributes to successful invasives. In molluscs, this may be facilitated by the albumen gland-capsule gland complex, which in gastropods secretes the egg perivitelline fluid that nourishes and protects embryos. The biochemistry of the albumen gland-capsule gland complex and its relationship with fecundity remain largely unknown. We addressed these issues in Pomacea canaliculata (Lamarck, 1822), a highly invasive gastropod whose fecundity and reproductive effort exceed those of ecologically similar gastropods. We evaluated the dynamics of its major secretion compounds (calcium, polysaccharides, and total proteins) as well as the gene expression and stored levels of perivitellins during key moments of the reproductive cycle, that is, before and after first copulation and at low, medium, and high reproductive output. Copulation and first oviposition do not trigger the onset of albumen gland-capsule gland complex biosynthesis. On the contrary, soon after an intermediate reproductive effort, genes encoding perivitellins overexpressed. A high reproductive effort caused a decrease in all albumen gland-capsule gland complex secretion components. Right after a high reproductive output, the albumen gland-capsule gland complex restored the main secretion components, and calcium recovered baseline reserves; but proteins and polysaccharides did not. These metabolic changes in the albumen gland-capsule gland complex after multiple ovipositions were reflected in a reduction in egg mass but did not compromise egg quality. At the end of the cycle, egg dry weight almost doubled the initial albumen gland-capsule gland complex weight. Results indicate that albumen gland-capsule gland complex biosynthesis limits a constantly high reproductive output. Therefore, lowering fecundity by targeting biosynthesis could effectively reduce the rate of this species' spread.
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Key Words
- AC, after copulation
- ACTB, β-actin
- AFO, after first ovipositon
- AFP, after first pause in oviposition
- AG, albumen gland
- AG-CG, albumen gland-capsule gland complex
- ARO, after repeated ovipositions
- BC, before copulation
- BM, before maturity
- CG, capsule gland
- GAPDH, glyceraldehyde-3-phosphate dehydrogenase
- NRT, no-retrotranscription control
- NTC, no-template control
- PVF, perivitelline fluid
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Lawand M, Evnouchidou I, Baranek T, Montealegre S, Tao S, Drexler I, Saveanu L, Si-Tahar M, van Endert P. Impact of the TAP-like transporter in antigen presentation and phagosome maturation. Mol Immunol 2018; 113:75-86. [PMID: 29941219 DOI: 10.1016/j.molimm.2018.06.268] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2017] [Revised: 04/23/2018] [Accepted: 06/14/2018] [Indexed: 02/06/2023]
Abstract
Cross-presentation is thought to require transport of proteasome-generated peptides by the TAP transporters into MHC class I loading compartments for most antigens. However, a proteasome-dependent but TAP-independent pathway has also been described. Depletion of the pool of recycling cell surface MHC class I molecules available for loading with cross-presented peptides might partly or largely account for the critical role of TAP in cross-presentation of phagocytosed antigens. Here we examined a potential role of the homodimeric lysosomal TAP-like transporter in cross-presentation and in presentation of endogenous peptides by MHC class II molecules. We find that TAP-L is strongly recruited to dendritic cell phagosomes at a late stage, when internalized antigen and MHC class I molecules have been degraded or sorted away from phagosomes. Cross-presentation of a receptor-targeted antigen in vitro and of a phagocytosed antigen in vivo, as well as presentation of a cytosolic antigen by MHC class II molecules, is not affected by TAP-L deficiency. However, accumulation in vitro of a peptide optimally adapted to TAP-L selectivity in purified phagosomes is abolished by TAP-L deficiency. Unexpectedly, we find that TAP-L deficiency accelerates phagosome maturation, as reflected in increased Lamp2b recruitment and enhanced proteolytic degradation of phagocytosed antigen and in vitro transported peptides. Although additional experimentation will be required to definitely conclude on the role of TAP-L in transport of peptides presented by MHC class I and class II molecules, our data suggest that the principal role of TAP-L in dendritic cells may be related to regulation of phagosome maturation.
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Affiliation(s)
- Myriam Lawand
- Institut National de la Sante et de la Recherche Médicale, Unité 1151; Université Paris Descartes, Faculté de médecine; Centre National de la Recherche Scientifique, UMR8253; 149 rue de Sèvres, 75743 Paris Cedex 15, France
| | - Irini Evnouchidou
- Institut National de la Sante et de la Recherche Médicale, Unité 1151; Université Paris Descartes, Faculté de médecine; Centre National de la Recherche Scientifique, UMR8253; 149 rue de Sèvres, 75743 Paris Cedex 15, France
| | - Thomas Baranek
- Institut National de la Santé et de la Recherche Médicale, Unité 1100, Université F. Rabelais, Faculté de médecine, Centre d'études des pathologies respiratoires, 10 Boulevard Tonnellé, 37032 Tours Cedex, France
| | - Sebastian Montealegre
- Institut National de la Sante et de la Recherche Médicale, Unité 1151; Université Paris Descartes, Faculté de médecine; Centre National de la Recherche Scientifique, UMR8253; 149 rue de Sèvres, 75743 Paris Cedex 15, France
| | - Sha Tao
- Institut für Virologie, Universitätsklinikum Düsseldorf, Heinrich-Heine Universität, 40225 Düsseldorf, Germany
| | - Ingo Drexler
- Institut für Virologie, Universitätsklinikum Düsseldorf, Heinrich-Heine Universität, 40225 Düsseldorf, Germany
| | - Loredana Saveanu
- Institut National de la Sante et de la Recherche Médicale, Unité 1151; Université Paris Descartes, Faculté de médecine; Centre National de la Recherche Scientifique, UMR8253; 149 rue de Sèvres, 75743 Paris Cedex 15, France
| | - Mustapha Si-Tahar
- Institut National de la Santé et de la Recherche Médicale, Unité 1100, Université F. Rabelais, Faculté de médecine, Centre d'études des pathologies respiratoires, 10 Boulevard Tonnellé, 37032 Tours Cedex, France
| | - Peter van Endert
- Institut National de la Sante et de la Recherche Médicale, Unité 1151; Université Paris Descartes, Faculté de médecine; Centre National de la Recherche Scientifique, UMR8253; 149 rue de Sèvres, 75743 Paris Cedex 15, France.
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18
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Saveanu L, Lotersztajn S. New pieces in the complex puzzle of aberrant vacuolation. Focus on “Active vacuolar H+ ATPase and functional cycle of Rab5 are required for the vacuolation defect triggered by PtdIns(3,5)P2 loss under PIKfyve or Vps34 deficiency”. Am J Physiol Cell Physiol 2016; 311:C363-5. [DOI: 10.1152/ajpcell.00215.2016] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Affiliation(s)
- Loredana Saveanu
- Institut National de la Santé et de la Recherché Médicale, Unité UMR 1149, Centre de Recherche sur l'Inflammation, Paris, France; and
- Université Paris Diderot, Faculté de Médecine Xavier Bichat, Paris, France
| | - Sophie Lotersztajn
- Institut National de la Santé et de la Recherché Médicale, Unité UMR 1149, Centre de Recherche sur l'Inflammation, Paris, France; and
- Université Paris Diderot, Faculté de Médecine Xavier Bichat, Paris, France
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19
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Keller M, Ebstein F, Bürger E, Textoris-Taube K, Gorny X, Urban S, Zhao F, Dannenberg T, Sucker A, Keller C, Saveanu L, Krüger E, Rothkötter HJ, Dahlmann B, Henklein P, Voigt A, Kuckelkorn U, Paschen A, Kloetzel PM, Seifert U. The proteasome immunosubunits, PA28 and ER-aminopeptidase 1 protect melanoma cells from efficient MART-126-35 -specific T-cell recognition. Eur J Immunol 2015; 45:3257-68. [PMID: 26399368 DOI: 10.1002/eji.201445243] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2014] [Revised: 08/23/2015] [Accepted: 09/21/2015] [Indexed: 01/29/2023]
Abstract
The immunodominant MART-1(26(27)-35) epitope, liberated from the differentiation antigen melanoma antigen recognized by T cells/melanoma antigen A (MART-1/Melan-A), has been frequently targeted in melanoma immunotherapy, but with limited clinical success. Previous studies suggested that this is in part due to an insufficient peptide supply and epitope presentation, since proteasomes containing the immunosubunits β5i/LMP7 (LMP, low molecular weight protein) or β1i/LMP2 and β5i/LMP7 interfere with MART-1(26-35) epitope generation in tumor cells. Here, we demonstrate that in addition the IFN-γ-inducible proteasome subunit β2i/MECL-1 (multicatalytic endopeptidase complex-like 1), proteasome activator 28 (PA28), and ER-resident aminopeptidase 1 (ERAP1) impair MART-1(26-35) epitope generation. β2i/MECL-1 and PA28 negatively affect C- and N-terminal cleavage and therefore epitope liberation from the proteasome, whereas ERAP1 destroys the MART-1(26-35) epitope by overtrimming activity. Constitutive expression of PA28 and ERAP1 in melanoma cells indicate that both interfere with MART-1(26-35) epitope generation even in the absence of IFN-γ. In summary, our results provide first evidence that activities of different antigen-processing components contribute to an inefficient MART-1(26-35) epitope presentation, suggesting the tumor cell's proteolytic machinery might have an important impact on the outcome of epitope-specific immunotherapies.
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Affiliation(s)
- Martin Keller
- Institut für Biochemie, Charité-Universitätsmedizin Berlin, Berlin, Germany
| | - Frédéric Ebstein
- Institut für Biochemie, Charité-Universitätsmedizin Berlin, Berlin, Germany
| | - Elke Bürger
- Institut für Biochemie, Charité-Universitätsmedizin Berlin, Berlin, Germany
| | | | - Xenia Gorny
- Institut für Molekulare und Klinische Immunologie, Medizinische Fakultät, Otto-von-Guericke-Universität Magdeburg, Magdeburg, Germany
| | - Sabrina Urban
- Institut für Biochemie, Charité-Universitätsmedizin Berlin, Berlin, Germany
| | - Fang Zhao
- Klinik für Dermatologie, Universitätsklinikum Essen, Essen and German Cancer Consortium (DKTK), Universität Duisburg-Essen, Essen, Germany
| | - Tanja Dannenberg
- Klinik für Dermatologie, Universitätsklinikum Essen, Essen and German Cancer Consortium (DKTK), Universität Duisburg-Essen, Essen, Germany
| | - Antje Sucker
- Klinik für Dermatologie, Universitätsklinikum Essen, Essen and German Cancer Consortium (DKTK), Universität Duisburg-Essen, Essen, Germany
| | - Christin Keller
- Institut für Biochemie, Charité-Universitätsmedizin Berlin, Berlin, Germany
| | | | - Elke Krüger
- Institut für Biochemie, Charité-Universitätsmedizin Berlin, Berlin, Germany
| | - Hermann-Josef Rothkötter
- Institut für Anatomie, Medizinische Fakultät, Otto-von-Guericke-Universität Magdeburg, Magdeburg, Germany
| | - Burkhardt Dahlmann
- Institut für Biochemie, Charité-Universitätsmedizin Berlin, Berlin, Germany
| | - Petra Henklein
- Institut für Biochemie, Charité-Universitätsmedizin Berlin, Berlin, Germany
| | - Antje Voigt
- Institut für Biochemie, Charité-Universitätsmedizin Berlin, Berlin, Germany.,DZHK (German Centre for Cardiovascular Research), Institut für Biochemie, Charité-Universitätsmedizin Berlin, Berlin, Germany
| | - Ulrike Kuckelkorn
- Institut für Biochemie, Charité-Universitätsmedizin Berlin, Berlin, Germany
| | - Annette Paschen
- Klinik für Dermatologie, Universitätsklinikum Essen, Essen and German Cancer Consortium (DKTK), Universität Duisburg-Essen, Essen, Germany
| | | | - Ulrike Seifert
- Institut für Biochemie, Charité-Universitätsmedizin Berlin, Berlin, Germany.,Institut für Molekulare und Klinische Immunologie, Medizinische Fakultät, Otto-von-Guericke-Universität Magdeburg, Magdeburg, Germany
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20
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Sun J, Furio L, Mecheri R, van der Does AM, Lundeberg E, Saveanu L, Chen Y, van Endert P, Agerberth B, Diana J. Pancreatic β-Cells Limit Autoimmune Diabetes via an Immunoregulatory Antimicrobial Peptide Expressed under the Influence of the Gut Microbiota. Immunity 2015; 43:304-17. [PMID: 26253786 DOI: 10.1016/j.immuni.2015.07.013] [Citation(s) in RCA: 204] [Impact Index Per Article: 22.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2014] [Revised: 05/15/2015] [Accepted: 05/22/2015] [Indexed: 12/14/2022]
Abstract
Antimicrobial peptides (AMPs) expressed by epithelial and immune cells are largely described for the defense against invading microorganisms. Recently, their immunomodulatory functions have been highlighted in various contexts. However how AMPs expressed by non-immune cells might influence autoimmune responses in peripheral tissues, such as the pancreas, is unknown. Here, we found that insulin-secreting β-cells produced the cathelicidin related antimicrobial peptide (CRAMP) and that this production was defective in non-obese diabetic (NOD) mice. CRAMP administrated to prediabetic NOD mice induced regulatory immune cells in the pancreatic islets, dampening the incidence of autoimmune diabetes. Additional investigation revealed that the production of CRAMP by β-cells was controlled by short-chain fatty acids produced by the gut microbiota. Accordingly, gut microbiota manipulations in NOD mice modulated CRAMP production and inflammation in the pancreatic islets, revealing that the gut microbiota directly shape the pancreatic immune environment and autoimmune diabetes development.
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Affiliation(s)
- Jia Sun
- State Key Laboratory of Food Science and Technology, Synergetic Innovation Center of Food Safety and Nutrition and School of Food Science and Technology, Jiangnan University, 1800 Lihu Avenue Wuxi, 214122 Jiangsu, P.R. China
| | - Laetitia Furio
- Institut National de la Santé et de la Recherche Médicale (INSERM), Unité 1163, Institut Imagine, 24 Boulevard du Montparnasse, 75015 Paris, France; Université Paris Descartes, Sorbonne Paris Cité, 12 Rue de l'École de Médecine, 75006 Paris, France
| | - Ramine Mecheri
- Université Paris Descartes, Sorbonne Paris Cité, 12 Rue de l'École de Médecine, 75006 Paris, France
| | - Anne M van der Does
- Department of Physiology and Pharmacology, Karolinska Institutet, SE-141 86 Stockholm, Sweden
| | - Erik Lundeberg
- Department of Physiology and Pharmacology, Karolinska Institutet, SE-141 86 Stockholm, Sweden
| | - Loredana Saveanu
- Université Paris Descartes, Sorbonne Paris Cité, 12 Rue de l'École de Médecine, 75006 Paris, France; Institut National de la Santé et de la Recherche Médicale (INSERM), Unité 1151, Institut Necker-Enfants Malades (INEM), Centre National de la Recherche Scientifique, Unité 8253, 149 rue de Sèvres, 75015 Paris, France
| | - Yongquan Chen
- State Key Laboratory of Food Science and Technology, Synergetic Innovation Center of Food Safety and Nutrition and School of Food Science and Technology, Jiangnan University, 1800 Lihu Avenue Wuxi, 214122 Jiangsu, P.R. China
| | - Peter van Endert
- Université Paris Descartes, Sorbonne Paris Cité, 12 Rue de l'École de Médecine, 75006 Paris, France; Institut National de la Santé et de la Recherche Médicale (INSERM), Unité 1151, Institut Necker-Enfants Malades (INEM), Centre National de la Recherche Scientifique, Unité 8253, 149 rue de Sèvres, 75015 Paris, France
| | - Birgitta Agerberth
- Medical Microbial Pathogenesis Department of Laboratory Medicine, Clinical Microbiology, Karolinska Institutet Karolinska University Hospital, SE-141 86 Stockholm, Sweden
| | - Julien Diana
- Université Paris Descartes, Sorbonne Paris Cité, 12 Rue de l'École de Médecine, 75006 Paris, France; Institut National de la Santé et de la Recherche Médicale (INSERM), Unité 1151, Institut Necker-Enfants Malades (INEM), Centre National de la Recherche Scientifique, Unité 8253, 149 rue de Sèvres, 75015 Paris, France.
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21
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Gutiérrez-Martínez E, Planès R, Anselmi G, Reynolds M, Menezes S, Adiko AC, Saveanu L, Guermonprez P. Cross-Presentation of Cell-Associated Antigens by MHC Class I in Dendritic Cell Subsets. Front Immunol 2015; 6:363. [PMID: 26236315 PMCID: PMC4505393 DOI: 10.3389/fimmu.2015.00363] [Citation(s) in RCA: 106] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2015] [Accepted: 07/05/2015] [Indexed: 12/12/2022] Open
Abstract
Dendritic cells (DCs) have the unique ability to pick up dead cells carrying antigens in tissue and migrate to the lymph nodes where they can cross-present cell-associated antigens by MHC class I to CD8+ T cells. There is strong in vivo evidence that the mouse XCR1+ DCs subset acts as a key player in this process. The intracellular processes underlying cross-presentation remain controversial and several pathways have been proposed. Indeed, a wide number of studies have addressed the cellular process of cross-presentation in vitro using a variety of sources of antigen and antigen-presenting cells. Here, we review the in vivo and in vitro evidence supporting the current mechanistic models and disscuss their physiological relevance to the cross-presentation of cell-associated antigens by DCs subsets.
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Affiliation(s)
- Enric Gutiérrez-Martínez
- Laboratory of Phagocyte Immunobiology, Peter Gorer Department of Immunobiology, CMCBI, King's College London , London , UK
| | - Remi Planès
- Laboratory of Phagocyte Immunobiology, Peter Gorer Department of Immunobiology, CMCBI, King's College London , London , UK
| | - Giorgio Anselmi
- Laboratory of Phagocyte Immunobiology, Peter Gorer Department of Immunobiology, CMCBI, King's College London , London , UK
| | - Matthew Reynolds
- Laboratory of Phagocyte Immunobiology, Peter Gorer Department of Immunobiology, CMCBI, King's College London , London , UK
| | - Shinelle Menezes
- Laboratory of Phagocyte Immunobiology, Peter Gorer Department of Immunobiology, CMCBI, King's College London , London , UK
| | - Aimé Cézaire Adiko
- Laboratory of Phagocyte Immunobiology, Peter Gorer Department of Immunobiology, Centre for Molecular & Cellular Biology of Inflammation (CMCBI), King's College London , Paris , France ; Sorbonne Paris Cité, Université Paris Diderot , Paris , France
| | - Loredana Saveanu
- Laboratory of Phagocyte Immunobiology, Peter Gorer Department of Immunobiology, Centre for Molecular & Cellular Biology of Inflammation (CMCBI), King's College London , Paris , France ; Sorbonne Paris Cité, Université Paris Diderot , Paris , France
| | - Pierre Guermonprez
- Laboratory of Phagocyte Immunobiology, Peter Gorer Department of Immunobiology, CMCBI, King's College London , London , UK
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22
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Adiko AC, Babdor J, Gutiérrez-Martínez E, Guermonprez P, Saveanu L. Intracellular Transport Routes for MHC I and Their Relevance for Antigen Cross-Presentation. Front Immunol 2015; 6:335. [PMID: 26191062 PMCID: PMC4489332 DOI: 10.3389/fimmu.2015.00335] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2015] [Accepted: 06/15/2015] [Indexed: 01/22/2023] Open
Abstract
Cross-presentation, in which exogenous antigens are presented via MHC I complexes, is involved both in the generation of anti-infectious and anti-tumoral cytotoxic CD8+ T cells and in the maintenance of immune tolerance. While cross-presentation was described almost four decades ago and while it is now established that some dendritic cell (DC) subsets are better than others in processing and cross-presenting internalized antigens, the involved molecular mechanisms remain only partially understood. Some of the least explored molecular mechanisms in cross-presentation concern the origin of cross-presenting MHC I molecules and the cellular compartments where antigenic peptide loading occurs. This review focuses on MHC I molecules and their intracellular trafficking. We discuss the source of cross-presenting MHC I in DCs as well as the role of the endocytic pathway in their recycling from the cell surface. Next, we describe the importance of the TAP peptide transporter for delivering peptides to MHC I during cross-presentation. Finally, we highlight the impact of innate immunity mechanisms on specific antigen cross-presentation mechanisms in which TLR activation modulates MHC I trafficking and TAP localization.
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Affiliation(s)
- Aimé Cézaire Adiko
- INSERM U1149, Faculté Bichat Medical School, ELR8252 CNRS, Center for Research on Inflammation , Paris , France ; Université Paris Diderot, Sorbonne Paris Cité , Paris , France
| | - Joel Babdor
- INSERM UMR 1163, Laboratory of Cellular and Molecular Mechanisms of Hematological Disorders and Therapeutic Implications , Paris , France ; Université Paris Descartes, Sorbonne Paris Cité , Paris , France ; Imagine Institute , Paris , France
| | - Enric Gutiérrez-Martínez
- Laboratory of Phagocyte Immunobiology, Peter Gorer Department of Immunobiology, King's College London , London , UK
| | - Pierre Guermonprez
- Laboratory of Phagocyte Immunobiology, Peter Gorer Department of Immunobiology, King's College London , London , UK
| | - Loredana Saveanu
- INSERM U1149, Faculté Bichat Medical School, ELR8252 CNRS, Center for Research on Inflammation , Paris , France ; Université Paris Diderot, Sorbonne Paris Cité , Paris , France
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Evnouchidou I, Weimershaus M, Saveanu L, van Endert P. ERAP1-ERAP2 dimerization increases peptide-trimming efficiency. J Immunol 2014; 193:901-8. [PMID: 24928998 DOI: 10.4049/jimmunol.1302855] [Citation(s) in RCA: 61] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
The endoplasmic reticulum aminopeptidases (ERAP)1 and ERAP2 play a critical role in the production of final epitopes presented by MHC class I molecules. Formation of heterodimers by ERAP1 and ERAP2 has been proposed to facilitate trimming of epitope precursor peptides, but the effects of dimerization on ERAP function remain unknown. In this study, we produced stabilized ERAP1-ERAP2 heterodimers and found that they produced several mature epitopes more efficiently than a mix of the two enzymes unable to dimerize. Physical interaction with ERAP2 changes basic enzymatic parameters of ERAP1 and improves its substrate-binding affinity. Thus, by bringing the two enzymes in proximity and by producing allosteric effects on ERAP1, dimerization of ERAP1/2 creates complexes with superior peptide-trimming efficacy. Such complexes are likely to enhance Ag presentation by cells displaying coordinated expression of the two enzymes.
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Affiliation(s)
- Irini Evnouchidou
- INSERM Unité 1151, 75015 Paris, France; Centre National de la Recherche Scientifique, Unité Mixte de Recherche 8253, 75015 Paris, France; and Faculté de Medicine, Université Paris Descartes, Sorbonne Paris Cité, 75015 Paris, France
| | - Mirjana Weimershaus
- INSERM Unité 1151, 75015 Paris, France; Centre National de la Recherche Scientifique, Unité Mixte de Recherche 8253, 75015 Paris, France; and Faculté de Medicine, Université Paris Descartes, Sorbonne Paris Cité, 75015 Paris, France
| | - Loredana Saveanu
- INSERM Unité 1151, 75015 Paris, France; Centre National de la Recherche Scientifique, Unité Mixte de Recherche 8253, 75015 Paris, France; and Faculté de Medicine, Université Paris Descartes, Sorbonne Paris Cité, 75015 Paris, France
| | - Peter van Endert
- INSERM Unité 1151, 75015 Paris, France; Centre National de la Recherche Scientifique, Unité Mixte de Recherche 8253, 75015 Paris, France; and Faculté de Medicine, Université Paris Descartes, Sorbonne Paris Cité, 75015 Paris, France
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Papakyriakou A, Zervoudi E, Theodorakis EA, Saveanu L, Stratikos E, Vourloumis D. Novel selective inhibitors of aminopeptidases that generate antigenic peptides. Bioorg Med Chem Lett 2013; 23:4832-6. [PMID: 23916253 DOI: 10.1016/j.bmcl.2013.07.024] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2013] [Revised: 07/12/2013] [Accepted: 07/15/2013] [Indexed: 11/15/2022]
Abstract
Endoplasmic reticulum aminopeptidases, ERAP1 and ERAP2, as well as Insulin regulated aminopeptidase (IRAP) play key roles in antigen processing, and have recently emerged as biologically important targets for manipulation of antigen presentation. Taking advantage of the available structural and substrate-selectivity data for these enzymes, we have rationally designed a new series of inhibitors that display low micromolar activity. The selectivity profile for these three highly homologous aminopeptidases provides a promising avenue for modulating intracellular antigen processing.
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Affiliation(s)
- Athanasios Papakyriakou
- Department of Chemistry & Biochemistry, University of California San Diego, 9500 Gilman Drive, La Jolla, CA 92093-0358, USA
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Abstract
Cross-presentation is defined as the ability of certain professional antigen-presenting cells to take up, process and present extracellular antigens on major histocompatibility class I (MHC-I) molecules to CD8+ T cells. The stimulation of naive cytotoxic CD8+ T cells by this process, termed cross-priming, is involved in many different responses, including those to tumors, pathogens, graft tissues, and self-antigens. Dendritic cells (DCs), a heterogeneous cell population, are endowed with the highest cross-priming capacity. Investigation of their cross-presentation capacities, important both for vaccination and for the induction of immune tolerance can be performed by in vivo and in vitro assays. In this chapter we describe the preparation of antigens that can be used to test cross-presentation via pinocytosis, receptor-mediated endocytosis, and phagocytosis.
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Affiliation(s)
- Loredana Saveanu
- Faculté de médecine René Descartes, INSERM U1013 and Université Paris Descartes, Sorbonne Paris Cité, Paris, France.
| | - Peter van Endert
- Faculté de médecine René Descartes, INSERM U1013 and Université Paris Descartes, Sorbonne Paris Cité, Paris, France
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26
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Saveanu L, Babdor J, Lawand M, van Endert P. Insulin-regulated aminopeptidase and its compartment in dendritic cells. Mol Immunol 2012; 55:153-5. [PMID: 23123036 DOI: 10.1016/j.molimm.2012.10.013] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2012] [Accepted: 10/12/2012] [Indexed: 01/10/2023]
Abstract
Peptide epitopes presented by MHC class I molecules are produced through sequential proteolysis, frequently terminating with an aminoterminal trimming step. While the trimming enzymes processing endogenous MHC class I ligands in the endoplasmic reticulum have by now been characterized extensively, we have only recently identified an endosomal enzyme, insulin-regulated aminopeptidase (IRAP) that can trim cross-presented peptides derived from proteins internalized by dendritic cells. Here we summarize the essential features of IRAP as a trimming enzyme, propose an updated model of cellular cross-presentation pathways, and discuss potential additional functions of IRAP and its compartment in dendritic cell biology.
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Affiliation(s)
- Loredana Saveanu
- Institut National de la Santé et de le Recherche Médicale, Unité 1013, Hôpital Necker, Paris, France
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27
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Abstract
Production of MHC-I ligands from antigenic proteins generally requires multiple proteolytic events. While the proteolytic steps required for antigen processing in the endogenous pathway are clearly established, persisting gaps of knowledge regarding putative cross-presentation compartments have made it difficult to map the precise proteolytic events required for generation of cross-presented antigens. It is only in the past decade that the importance of aminoterminal trimming as the final step in the endogenous presentation pathway has been recognized and that the corresponding enzymes have been described. This review focuses on the aminoterminal trimming of exogenous cross-presented peptides, with particular emphasis on the identification of insulin responsive aminopeptidase (IRAP) as the principal trimming aminopeptidase in endosomes and phagosomes.
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Affiliation(s)
- Loredana Saveanu
- Institut National de la Santé et de le Recherche Médicale Paris, France
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28
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Weimershaus M, Maschalidi S, Sepulveda F, Manoury B, van Endert P, Saveanu L. Conventional Dendritic Cells Require IRAP-Rab14 Endosomes for Efficient Cross-Presentation. J I 2012; 188:1840-6. [DOI: 10.4049/jimmunol.1101504] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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29
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Saveanu L, Carroll O, Weimershaus M, Guermonprez P, Firat E, Lindo V, Greer F, Davoust J, Kratzer R, Keller SR, Niedermann G, van Endert P. IRAP identifies an endosomal compartment required for MHC class I cross-presentation. Science 2009; 325:213-7. [PMID: 19498108 DOI: 10.1126/science.1172845] [Citation(s) in RCA: 200] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
Abstract
Major histocompatibility complex (MHC) class I molecules present peptides, produced through cytosolic proteasomal degradation of cellular proteins, to cytotoxic T lymphocytes. In dendritic cells, the peptides can also be derived from internalized antigens through a process known as cross-presentation. The cellular compartments involved in cross-presentation remain poorly defined. We found a role for peptide trimming by insulin-regulated aminopeptidase (IRAP) in cross-presentation. In human dendritic cells, IRAP was localized to a Rab14+ endosomal storage compartment in which it interacted with MHC class I molecules. IRAP deficiency compromised cross-presentation in vitro and in vivo but did not affect endogenous presentation. We propose the existence of two pathways for proteasome-dependent cross-presentation in which final peptide trimming involves IRAP in endosomes and involves the related aminopeptidases in the endoplasmic reticulum.
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Affiliation(s)
- Loredana Saveanu
- INSERM, U580, 75015 Paris, France; Université Paris Descartes, Faculté de Médecine René Descartes, 75015 Paris, France
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30
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Fruci D, Giacomini P, Nicotra MR, Forloni M, Fraioli R, Saveanu L, van Endert P, Natali PG. Altered expression of endoplasmic reticulum aminopeptidases ERAP1 and ERAP2 in transformed non-lymphoid human tissues. J Cell Physiol 2008; 216:742-9. [PMID: 18393273 DOI: 10.1002/jcp.21454] [Citation(s) in RCA: 75] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
The endoplasmic reticulum (ER) aminopeptidases ERAP1 and ERAP2 contribute to generate HLA class I binding peptides. Recently, we have shown that the expression of these enzymes is high and coordinated (with each other and with HLA class I molecules) in immortalized B cells, but variable and imbalanced in human tumour cell lines of various non-lymphoid lineages. Herein, this issue was investigated in vivo by testing ERAP1 and ERAP2 expression in normal non-lymphoid tissues and their malignant counterparts. ERAP1 and ERAP2 were detected exclusively in the epithelial cells of over half of the tested normal tissues. Four ERAP1/ERAP2 phenotypes (+/+, -/-, +/- and -/+) were detected, and the presence of either or both enzymes was not necessarily associated with HLA class I expression. In more than 160 neoplastic lesions, the expression of either or both aminopeptidases was retained, lost (most frequently, particularly ERAP1) or acquired as compared to the normal counterparts, depending on the tumour histotype. The double-negative (-/-) phenotype was the most frequent, and significantly (P = 0.013) associated with a lack of detectable HLA class I antigens. In selected neoplastic lesions, ERAP1 and ERAP2 were also tested for their enzymatic (peptide-trimming) activities. Expression and function were found to correlate, indicating that immunohistochemistry detects active enzymes in vivo. Thus, dissociation in the expression of ERAP1, ERAP2 and HLA class I may already be present in some normal tissues, but malignant transformation causes additional losses, gains and imbalances in specific tumour histotypes, and these alter the peptide-trimming ability of tumour cells in vivo.
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31
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Firat E, Huai J, Saveanu L, Gaedicke S, Aichele P, Eichmann K, van Endert P, Niedermann G. Analysis of direct and cross-presentation of antigens in TPPII knockout mice. J Immunol 2008; 179:8137-45. [PMID: 18056356 DOI: 10.4049/jimmunol.179.12.8137] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Tripeptidyl peptidase II (TPPII) is an oligopeptidase forming giant complexes in the cytosol that have high exo-, but also, endoproteolytic activity. Immunohistochemically, the complexes appear as distinct foci in the cytosol. In part controversial biochemical and functional studies have suggested that TPPII contributes, on the one hand, positively to Ag processing by generating epitope carboxyl termini or by trimming epitope precursors, and, on the other, negatively by destroying potentially antigenic peptides. To clarify which of these roles is predominant, we generated and analyzed TPPII-deficient mice. Cell surface levels of MHC class I peptide complexes tended to be increased on most cell types of these mice. Although presentation of three individual epitopes derived from lymphocytic choriomeningitis virus was not elevated on TPPII-/- cells, that of the immunodominant OVA epitope SIINFEKL was significantly enhanced. Consistent with this, degradation of a synthetic peptide corresponding to the OVA epitope and of another corresponding to a precursor thereof, both being proteasomally generated OVA fragments, was delayed in TPPII-deficient cytosolic extracts. In addition, dendritic cell cross-presentation of phagocytosed OVA and of OVA internalized as an immune complex was increased to about the same level as direct presentation of the Ag. The data suggest a moderate, predominantly destructive role of TPPII in class I Ag processing, in line with our finding that TPPII is not induced by IFN-gamma, which up-regulates numerous, predominantly constructive components of the Ag processing and presentation machinery.
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Affiliation(s)
- Elke Firat
- Clinic for Radiotherapy, University Hospital of Freiburg, Freiburg, Germany
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32
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Firat E, Saveanu L, Aichele P, Staeheli P, Huai J, Gaedicke S, Nil A, Besin G, Kanzler B, van Endert P, Niedermann G. The Role of Endoplasmic Reticulum-Associated Aminopeptidase 1 in Immunity to Infection and in Cross-Presentation. J Immunol 2007; 178:2241-8. [PMID: 17277129 DOI: 10.4049/jimmunol.178.4.2241] [Citation(s) in RCA: 88] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Endoplasmic reticulum-associated aminopeptidase 1 (ERAP1) is involved in the final processing of endogenous peptides presented by MHC class I molecules to CTLs. We generated ERAP1-deficient mice and analyzed cytotoxic responses upon infection with three viruses, including lymphocytic choriomeningitis virus, which causes vigorous T cell activation and is controlled by CTLs. Despite pronounced effects on the presentation of selected epitopes, the in vivo cytotoxic response was altered for only one of several epitopes tested. Moreover, control of lymphocytic choriomeningitis virus was not impaired in the knockout mice. Thus, we conclude that lack of ERAP1 has little influence on antiviral immunohierarchies and antiviral immunity in the infections studied. We also focused on the role of ERAP1 in cross-presentation. We demonstrate that ERAP1 is required for efficient cross-presentation of cell-associated Ag and of OVA/anti-OVA immunocomplexes. Surprisingly, however, ERAP1 deficiency has no effect on cross-presentation of soluble OVA, suggesting that for soluble exogenous proteins, final processing may not take place in an environment containing active ERAP1.
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Affiliation(s)
- Elke Firat
- Clinic for Radiotherapy, University Hospital of Freiburg, Freiburg, Germany
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33
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Samino Y, López D, Guil S, Saveanu L, van Endert PM, Del Val M. A long N-terminal-extended nested set of abundant and antigenic major histocompatibility complex class I natural ligands from HIV envelope protein. J Biol Chem 2006; 281:6358-65. [PMID: 16407287 DOI: 10.1074/jbc.m512263200] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Viral antigens complexed with major histocompatibility complex (MHC) class I molecules are recognized by cytotoxic T lymphocytes on infected cells. Assays with synthetic peptides identify optimal MHC class I ligands often used for vaccines. However, when natural peptides are analyzed, more complex mixtures including long peptides bulging in the middle of the binding site or with carboxyl extensions are found, reflecting lack of exposure to carboxypeptidases in the antigen processing pathway. In contrast, precursor peptides are exposed to extensive cytosolic aminopeptidase activity, and fewer than 1% survive, only to be further trimmed in the endoplasmic reticulum. We show here a striking example of a nested set of at least three highly antigenic and similarly abundant natural MHC class I ligands, 15, 10, and 9 amino acids in length, derived from a single human immunodeficiency virus gp160 epitope. Antigen processing, thus, gives rise to a rich pool of possible ligands from which MHC class I molecules can choose. The natural peptide set includes a 15-residue-long peptide with unprecedented 6 N-terminal residues that most likely extend out of the MHC class I binding groove. This 15-mer is the longest natural peptide known recognized by cytotoxic T lymphocytes and is surprisingly protected from aminopeptidase trimming in living cells.
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Affiliation(s)
- Yolanda Samino
- Centro Nacional de Microbiología, Instituto de Salud Carlos III, 28220 Madrid, Spain
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34
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Saveanu L, Carroll O, Hassainya Y, van Endert P. Complexity, contradictions, and conundrums: studying post-proteasomal proteolysis in HLA class I antigen presentation. Immunol Rev 2005; 207:42-59. [PMID: 16181326 DOI: 10.1111/j.0105-2896.2005.00313.x] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
The vast majority of the peptides produced during protein degradation by the cytosolic proteasome-ubiquitin system are consecutively hydrolyzed to single amino acids by multiple cytosolic peptidases preferring intermediate length or short substrates. The small fraction of peptides surviving the aggressive cytosolic environment can be recruited for presentation by major histocompatibility complex (MHC) class I molecules. However, such peptides may frequently have to be adapted to the strict MHC class I-binding requirements by one or several N-terminal-trimming steps. A recent model proposes that an initial step, in which peptides of 15 or more residues are shortened by cytosolic tripeptidylpeptidase II, is followed by additional trimming by cytosolic or endoplasmic reticulum (ER) aminopeptidases. In humans, at least two ER resident aminopeptidases, ERAP1 and ERAP2, contribute to trimming of human leukocyte antigen class I ligands. These interferon-gamma-regulated metallopeptidases show distinct substrate preferences and may have to act in a concerted fashion to remove some complex or longer N-terminal extensions and to trim the full spectrum of precursor peptides. This task is likely facilitated by the formation of presumably heterodimeric ERAP1-2 complexes. RNA interference experiments suggest that both enzymes are important for normal antigen presentation, but precise determination of the extent and the cellular context of their requirement will be left to future experimentation.
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35
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Gannagé M, Abel M, Michallet AS, Delluc S, Lambert M, Giraudier S, Kratzer R, Niedermann G, Saveanu L, Guilhot F, Camoin L, Varet B, Buzyn A, Caillat-Zucman S. Ex Vivo Characterization of Multiepitopic Tumor-Specific CD8 T Cells in Patients with Chronic Myeloid Leukemia: Implications for Vaccine Development and Adoptive Cellular Immunotherapy. J Immunol 2005; 174:8210-8. [PMID: 15944330 DOI: 10.4049/jimmunol.174.12.8210] [Citation(s) in RCA: 91] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Identification of tumor-associated Ags is a prerequisite for vaccine-based and adoptive immune therapies. Some tumor-associated Ags elicit specific CD8 T cells in patients with chronic myeloid leukemia (CML). Here, we characterized ex vivo responses of CD8 T cells from CML patients to extrajunction bcr-abl peptides and telomerase 540-548 hTert, PR1, and WT1 peptides. CML-specific CD8 T cells were present in most treated patients and were usually multiepitopic: WT1, hTert, PR1, and bcr74 tetramer(+) cells were detected in 85, 82, 67, and 61% of patients, respectively. The breadth and magnitude of these responses did not differ significantly according to treatment or disease status. CML-specific tetramer(+) CD8 T cells had a predominantly memory phenotype, an intermediate perforin content, and low intracellular IFN-gamma accumulation in the presence of the relevant peptide. However, in short-term culture with HLA-matched leukemia cells, the patients' memory T cells were specifically reactivated to become IFN-gamma-producing effector cells, suggesting that CD8 T cell precursors with lytic potential are present in vivo and can be activated by appropriate stimulation. In conclusion, this study shows that multiepitopic tumor-specific CD8 T cell responses occur naturally in most CML patients, opening the way to new strategies for enhancing anti-CML immunity, in particular in patients with minimal residual disease.
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MESH Headings
- Antigens, Neoplasm/immunology
- Antigens, Neoplasm/metabolism
- CD8-Positive T-Lymphocytes/immunology
- CD8-Positive T-Lymphocytes/metabolism
- CD8-Positive T-Lymphocytes/pathology
- Cancer Vaccines/immunology
- DNA-Binding Proteins/immunology
- DNA-Binding Proteins/metabolism
- Epitopes, T-Lymphocyte/immunology
- Epitopes, T-Lymphocyte/metabolism
- Fusion Proteins, bcr-abl/immunology
- Fusion Proteins, bcr-abl/metabolism
- HLA-A2 Antigen/metabolism
- Humans
- Immunologic Memory
- Immunophenotyping
- Immunotherapy, Adoptive/methods
- Interferon-gamma/biosynthesis
- Leukemia, Myelogenous, Chronic, BCR-ABL Positive/immunology
- Leukemia, Myelogenous, Chronic, BCR-ABL Positive/pathology
- Leukemia, Myelogenous, Chronic, BCR-ABL Positive/therapy
- Lymphocyte Count
- Myeloblastin
- Peptide Fragments/metabolism
- Protein Binding/immunology
- Serine Endopeptidases/immunology
- Serine Endopeptidases/metabolism
- Spectrometry, Mass, Matrix-Assisted Laser Desorption-Ionization
- Telomerase/immunology
- Telomerase/metabolism
- WT1 Proteins/immunology
- WT1 Proteins/metabolism
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Affiliation(s)
- Monique Gannagé
- Institut National de la Santé et de la Recherche Médicale (INSERM) Equipe Avenir, Unité 561, Hôpital St-Vincent de Paul, Paris, France
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36
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Saveanu L, Carroll O, Lindo V, Del Val M, Lopez D, Lepelletier Y, Greer F, Schomburg L, Fruci D, Niedermann G, van Endert PM. Concerted peptide trimming by human ERAP1 and ERAP2 aminopeptidase complexes in the endoplasmic reticulum. Nat Immunol 2005; 6:689-97. [PMID: 15908954 DOI: 10.1038/ni1208] [Citation(s) in RCA: 350] [Impact Index Per Article: 18.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2005] [Accepted: 04/13/2005] [Indexed: 01/01/2023]
Abstract
The generation of many HLA class I peptides entails a final trimming step in the endoplasmic reticulum that, in humans, is accomplished by two 'candidate' aminopeptidases. We show here that one of these, ERAP1, was unable to remove several N-terminal amino acids that were trimmed efficiently by the second enzyme, ERAP2. This trimming of a longer peptide required the concerted action of both ERAP1 and ERAP2, both for in vitro digestion and in vivo for cellular antigen presentation. ERAP1 and ERAP2 localized together in vivo and associated physically in complexes that were most likely heterodimeric. Thus, the human endoplasmic reticulum is equipped with a pair of trimming aminopeptidases that have complementary functions in HLA class I peptide presentation.
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Affiliation(s)
- Loredana Saveanu
- Institut National de la Sante et Recherche Médicale Unité 580, Université René Descartes Paris 5, 75015 Paris, France
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37
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38
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Guermonprez P, Saveanu L, Kleijmeer M, Davoust J, Van Endert P, Amigorena S. ER-phagosome fusion defines an MHC class I cross-presentation compartment in dendritic cells. Nature 2003; 425:397-402. [PMID: 14508489 DOI: 10.1038/nature01911] [Citation(s) in RCA: 570] [Impact Index Per Article: 27.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2003] [Accepted: 07/10/2003] [Indexed: 11/09/2022]
Abstract
Induction of cytotoxic T-cell immunity requires the phagocytosis of pathogens, virus-infected or dead tumour cells by dendritic cells. Peptides derived from phagocytosed antigens are then presented to CD8+ T lymphocytes on major histocompatibility complex (MHC) class I molecules, a process called "cross-presentation". After phagocytosis, antigens are exported into the cytosol and degraded by the proteasome. The resulting peptides are thought to be translocated into the lumen of the endoplasmic reticulum (ER) by specific transporters associated with antigen presentation (TAP), and loaded onto MHC class I molecules by a complex "loading machinery" (which includes tapasin, calreticulin and Erp57). Here we show that soon after or during formation, phagosomes fuse with the ER. After antigen export to the cytosol and degradation by the proteasome, peptides are translocated by TAP into the lumen of the same phagosomes, before loading on phagosomal MHC class I molecules. Therefore, cross-presentation in dendritic cells occurs in a specialized, self-sufficient, ER-phagosome mix compartment.
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39
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Lucchiari-Hartz M, Lindo V, Hitziger N, Gaedicke S, Saveanu L, van Endert PM, Greer F, Eichmann K, Niedermann G. Differential proteasomal processing of hydrophobic and hydrophilic protein regions: contribution to cytotoxic T lymphocyte epitope clustering in HIV-1-Nef. Proc Natl Acad Sci U S A 2003; 100:7755-60. [PMID: 12810958 PMCID: PMC164660 DOI: 10.1073/pnas.1232228100] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2003] [Indexed: 11/18/2022] Open
Abstract
HIV proteins contain a multitude of naturally processed cytotoxic T lymphocyte (CTL) epitopes that concentrate in clusters. The molecular basis of epitope clustering is of interest for understanding HIV immunogenicity and for vaccine design. We show that the CTL epitope clusters of HIV proteins predominantly coincide with hydrophobic regions, whereas the noncluster regions are predominantly hydrophilic. Analysis of the proteasomal degradation products of full-length HIV-Nef revealed a differential sensitivity of cluster and noncluster regions to proteasomal processing. Compared with the epitope-scarce noncluster regions, cluster regions are digested by proteasomes more intensively and with greater preference for hydrophobic P1 residues, resulting in substantially greater numbers of fragments with the sizes and COOH termini typical of epitopes and their precursors. Indeed, many of these fragments correspond to endogenously processed Nef epitopes and/or their potential precursors. The results suggest that differential proteasomal processing contributes importantly to the clustering of CTL epitopes in hydrophobic regions.
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Affiliation(s)
- Maria Lucchiari-Hartz
- Department of Cellular Immunology, Max Planck Institute of Immunobiology, Stübeweg 51, D-79108 Freiburg, Germany
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40
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Fruci D, Lauvau G, Saveanu L, Amicosante M, Butler RH, Polack A, Ginhoux F, Lemonnier F, Firat H, van Endert PM. Quantifying recruitment of cytosolic peptides for HLA class I presentation: impact of TAP transport. J Immunol 2003; 170:2977-84. [PMID: 12626550 DOI: 10.4049/jimmunol.170.6.2977] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
MHC class I ligands are recruited from the cytosolic peptide pool, whose size is likely to depend on the balance between peptide generation by the proteasome and peptide degradation by downstream peptidases. We asked what fraction of this pool is available for presentation, and how the size of this fraction is modulated by peptide affinity for the TAP transporters. A model epitope restricted by HLA-A2 and a series of epitope precursors with N-terminal extensions by single residues modifying TAP affinity were expressed in a system that allowed us to monitor and modulate cytosolic peptide copy numbers. We show that presentation varies strongly according to TAP affinities of the epitope precursors. The fraction of cytosolic peptides recruited for MHC presentation does not exceed 1% and is more than two logs lower for peptides with very low TAP affinities. Therefore, TAP affinity has a substantial impact on MHC class I Ag presentation.
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MESH Headings
- ATP-Binding Cassette Transporters/immunology
- ATP-Binding Cassette Transporters/metabolism
- Animals
- Antigen Presentation/genetics
- Binding, Competitive/genetics
- Binding, Competitive/immunology
- Cell Line, Transformed
- Cytosol/immunology
- Cytosol/metabolism
- Cytotoxicity Tests, Immunologic/methods
- Epitopes, T-Lymphocyte/genetics
- Epitopes, T-Lymphocyte/immunology
- Epitopes, T-Lymphocyte/metabolism
- Green Fluorescent Proteins
- H-2 Antigens/immunology
- H-2 Antigens/metabolism
- HLA-A2 Antigen/immunology
- HLA-A2 Antigen/metabolism
- Histocompatibility Antigen H-2D
- Humans
- Luminescent Proteins/genetics
- Mice
- Mice, Knockout
- Mice, Transgenic
- Peptides/genetics
- Peptides/immunology
- Peptides/metabolism
- Protein Transport/genetics
- Protein Transport/immunology
- T-Lymphocytes, Cytotoxic/immunology
- T-Lymphocytes, Cytotoxic/metabolism
- Transfection/methods
- Tumor Cells, Cultured
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Affiliation(s)
- Doriana Fruci
- Institut National de la Santé et de la Recherche Médicale Unité 580, Institut Necker, Paris, France
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41
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Abstract
The proteasome is now recognized to be implicated in the generation of the vast majority of MHC class I ligands. Moreover, it is probably the only cytosolic protease generating their carboxyterminals. However, solid evidence documents a role of additional and only partly identified proteases in MHC class I antigen processing. Cytosolic tripeptidyl peptidase (TTP II) may be able to carry out some functions normally ascribed to the proteasome, including that of generating antigenic peptides. Several cytosolic enzymes, including bleomycin hydrolase (BH) and puromycin-sensitive aminopeptidase (PSA), but especially the IFNgamma-inducible leucyl aminopeptidase (LAP), can trim the aminoterminal ends of class I ligands. The vast majority of cytosolic peptides is degraded, a process likely to limit antigen presentation, in which thimet oligopeptidase (TOP) may play an important role. Proteolytic activity in the secretory pathway, though much more limited than in the cytosol, also contributes to class I antigen presentation. Signal peptide fragments and peptides at the carboxyterminal end of various proteins targeted to the endoplasmic reticulum can be highly efficient TAP-independent class I ligands. However, an as yet unidentified luminal trimming aminopeptidase may eventually turn out to play the most important role for class I ligand generation in the secretory pathway. Defining the extent of the involvement of cytosolic and luminal peptidases in class I antigen processing will be a challenging task for the future.
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42
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Abstract
ATP-binding cassette (ABC) transporters represent a large family of membrane-spanning proteins that have a shared structural organization and conserved nucleotide-binding domains (NBDs). They transport a large variety of solutes, and defects in these transporters are an important cause of human disease. TAP (tmacr;ransporter associated with āntigen pmacr;rocessing) is a heterodimeric ABC transporter that uses nucleotides to drive peptide transport from the cytoplasm into the endoplasmic reticulum lumen, where the peptides then bind major histocompatibility complex (MHC) class I molecules. TAP plays an essential role in the MHC class I antigen presentation pathway. Recent studies show that the two NBDs of TAP fulfil distinct functions in the catalytic cycle of this transporter. In this opinion article, a model of alternating ATP binding and hydrolysis is proposed, in which nucleotide interaction with TAP2 primarily controls substrate binding and release, whereas interaction with TAP1 controls structural rearrangements of the transmembrane pathway. Viral proteins that inhibit TAP function cause arrests at distinct points of this catalytic cycle.
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43
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Saveanu L, Van Endert PM. Regulation of transporters associated with antigen processing (TAPs) by nucleotide binding to, and hydrolysis by, Walker consensus sequences. Adv Exp Med Biol 2002; 495:79-82. [PMID: 11774612 DOI: 10.1007/978-1-4615-0685-0_11] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/23/2023]
Affiliation(s)
- L Saveanu
- Institut National de la Santé et de la Recherche Médicale Unité 25, 161 rue de Sèvres, 75743 Paris, France
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44
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Saveanu L, Daniel S, van Endert PM. Distinct functions of the ATP binding cassettes of transporters associated with antigen processing: a mutational analysis of Walker A and B sequences. J Biol Chem 2001; 276:22107-13. [PMID: 11290739 DOI: 10.1074/jbc.m011221200] [Citation(s) in RCA: 38] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
The transporters associated with antigen processing (TAP1/TAP2) provide peptides to MHC class I molecules in the endoplasmic reticulum. Like other ATP-binding cassette proteins, TAP uses ATP hydrolysis to power transport. We have studied peptide binding to as well as translocation by TAP proteins with mutations in the Walker A and B sequences that are known to mediate ATP binding and hydrolysis. We show that a mutation in the TAP1 Walker B sequence reported to abrogate class I expression by a lung tumor does not affect ATP binding affinity, suggesting a defect restricted to ATP hydrolysis. This mutation reduces peptide transport by only 50%, suggesting that TAP function can be highly limiting for antigen presentation in non-lymphoid cells. Single substitutions in Walker A sequences (TAP1K544A, TAP2K509A), or their complete replacements, abrogate nucleotide binding to each subunit. Although all of these mutations abrogate peptide transport, they reveal distinct roles for nucleotide binding to the two transporter subunits in TAP folding and in regulation of peptide substrate affinity, respectively. Alteration of the TAP1 Walker A motif can have strong effects on TAP1 and thereby TAP complex folding. However, TAP1 Walker A mutations compatible with correct folding do not affect peptide binding. In contrast, abrogation of the TAP2 nucleotide binding capacity has little or no effect on TAP folding but eliminates peptide binding to TAP at 37 degrees C in the presence of nucleotides. Thus, nucleotide binding to TAP2 but not to TAP1 is a prerequisite for peptide binding to TAP. Based on these results, we propose a model in which nucleotide and peptide release from TAP are coupled and followed by ATP binding to TAP2, which induces high peptide affinity and initiates the transport cycle.
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Affiliation(s)
- L Saveanu
- INSERM U25, 161 rue de Sèvres, 75743 Paris cedex 15, France
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