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Mihaescu G, Chifiriuc MC, Filip R, Bleotu C, Ditu LM, Constantin M, Cristian RE, Grigore R, Bertesteanu SV, Bertesteanu G, Vrancianu CO. Role of interferons in the antiviral battle: from virus-host crosstalk to prophylactic and therapeutic potential in SARS-CoV-2 infection. Front Immunol 2024; 14:1273604. [PMID: 38288121 PMCID: PMC10822962 DOI: 10.3389/fimmu.2023.1273604] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2023] [Accepted: 12/29/2023] [Indexed: 01/31/2024] Open
Abstract
Mammalians sense antigenic messages from infectious agents that penetrate the respiratory and digestive epithelium, as well as signals from damaged host cells through membrane and cytosolic receptors. The transduction of these signals triggers a personalized response, depending on the nature of the stimulus and the host's genetics, physiological condition, and comorbidities. Interferons (IFNs) are the primary effectors of the innate immune response, and their synthesis is activated in most cells within a few hours after pathogen invasion. IFNs are primarily synthesized in infected cells, but their anti-infective effect is extended to the neighboring cells by autocrine and paracrine action. The emergence of the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) pandemic in 2019 was a stark reminder of the potential threat posed by newly emerging viruses. This pandemic has also triggered an overwhelming influx of research studies aiming to unveil the mechanisms of protective versus pathogenic host immune responses induced by SARS-CoV-2. The purpose of this review is to describe the role of IFNs as vital players in the battle against SARS-CoV-2 infection. We will briefly characterize and classify IFNs, present the inductors of IFN synthesis, their sensors, and signaling pathways, and then discuss the role of IFNs in controlling the evolution of SARS-CoV-2 infection and its clinical outcome. Finally, we will present the perspectives and controversies regarding the prophylactic and therapeutic potential of IFNs in SARS-CoV-2 infection.
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Affiliation(s)
- Grigore Mihaescu
- Microbiology Immunology Department, Faculty of Biology, University of Bucharest, Bucharest, Romania
- The Research Institute of the University of Bucharest, Bucharest, Romania
| | - Mariana Carmen Chifiriuc
- Microbiology Immunology Department, Faculty of Biology, University of Bucharest, Bucharest, Romania
- The Research Institute of the University of Bucharest, Bucharest, Romania
- Department of Life, Medical and Agricultural Sciences, Biological Sciences Section, Academy of Romanian Scientists, Bucharest, Romania
| | - Roxana Filip
- Faculty of Medicine and Biological Sciences, Stefan cel Mare University of Suceava, Suceava, Romania
- Microbiology Department, Suceava Emergency County Hospital, Suceava, Romania
| | - Coralia Bleotu
- The Research Institute of the University of Bucharest, Bucharest, Romania
- Cellular and Molecular Pathology Department, Stefan S. Nicolau Institute of Virology, Bucharest, Romania
| | - Lia Mara Ditu
- Microbiology Immunology Department, Faculty of Biology, University of Bucharest, Bucharest, Romania
| | - Marian Constantin
- The Research Institute of the University of Bucharest, Bucharest, Romania
- Institute of Biology of Romanian Academy, Bucharest, Romania
| | - Roxana-Elena Cristian
- The Research Institute of the University of Bucharest, Bucharest, Romania
- Department of Biochemistry and Molecular Biology, Faculty of Biology, University of Bucharest, Bucharest, Romania
| | - Raluca Grigore
- ENT Department, University of Medicine and Pharmacy Carol Davila and Coltea Clinical Hospital, Bucharest, Romania
| | - Serban Vifor Bertesteanu
- ENT Department, University of Medicine and Pharmacy Carol Davila and Coltea Clinical Hospital, Bucharest, Romania
| | - Gloria Bertesteanu
- ENT Department, University of Medicine and Pharmacy Carol Davila and Coltea Clinical Hospital, Bucharest, Romania
| | - Corneliu Ovidiu Vrancianu
- Microbiology Immunology Department, Faculty of Biology, University of Bucharest, Bucharest, Romania
- The Research Institute of the University of Bucharest, Bucharest, Romania
- DANUBIUS Department, National Institute of Research and Development for Biological Sciences, Bucharest, Romania
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2
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Gasparotto M, Franco C, Zanatta E, Ghirardello A, Zen M, Iaccarino L, Fabris B, Doria A, Gatto M. The interferon in idiopathic inflammatory myopathies: Different signatures and new therapeutic perspectives. A literature review. Autoimmun Rev 2023; 22:103334. [PMID: 37068699 DOI: 10.1016/j.autrev.2023.103334] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2023] [Accepted: 04/13/2023] [Indexed: 04/19/2023]
Abstract
Idiopathic inflammatory myopathies (IIM), even though sharing common clinical manifestations, are characterized by diversified molecular pathogenetic mechanisms which may account for the partial inefficacy of currently used immunomodulatory drugs. In the last decades, the role of interferon (IFN) in IIM has been extensively elucidated thanks to genomic and proteomic studies which have assessed the molecular signature at the level of affected tissues or in peripheral blood across distinct IIM subtypes. A predominant type I IFN response has been shown in dermatomyositis (DM), being especially enhanced in MDA5+ DM, while a type 2 IFN profile characterizes anti-synthetase syndrome (ASyS) and inclusion body myositis (IBM); conversely, a less robust IFN footprint has been defined for immune-mediated necrotizing myopathy (IMNM). Intracellular IFN signaling is mediated by the janus kinase/signal transducer and activator of transcription (JAK/STAT) through dedicated transmembrane receptors and specific cytoplasmic molecular combinations. These results may have therapeutic implications and led to evaluating the efficacy of new targeted drugs such as the recently introduced janus kinase inhibitors (JAKi), currently approved for the treatment of rheumatoid arthritis, psoriatic arthritis, and ankylosing spondylitis. In this review we aim to summarize the most significant evidence of IFN role in IIM pathogenesis and to describe the current state of the art about the ongoing clinical trials on IFN-targeting drugs, with particular focus on JAKi.
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Affiliation(s)
- M Gasparotto
- Rheumatology Unit, Department of Medicine, University of Padua, 35128 Pauda, Italy.
| | - C Franco
- Rheumatology Unit, Department of Medicine, University of Padua, 35128 Pauda, Italy.
| | - E Zanatta
- Rheumatology Unit, Department of Medicine, University of Padua, 35128 Pauda, Italy.
| | - A Ghirardello
- Rheumatology Unit, Department of Medicine, University of Padua, 35128 Pauda, Italy.
| | - M Zen
- Rheumatology Unit, Department of Medicine, University of Padua, 35128 Pauda, Italy.
| | - L Iaccarino
- Rheumatology Unit, Department of Medicine, University of Padua, 35128 Pauda, Italy.
| | - B Fabris
- Department of Medical, Surgical and Health Sciences, University of Trieste, Strada di Fiume 447, 34149 Trieste, Italy.
| | - A Doria
- Rheumatology Unit, Department of Medicine, University of Padua, 35128 Pauda, Italy.
| | - M Gatto
- Rheumatology Unit, Department of Medicine, University of Padua, 35128 Pauda, Italy.
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3
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Dou X, Yu X, Du S, Han Y, Li L, Zhang H, Yao Y, Du Y, Wang X, Li J, Yang T, Zhang W, Yang C, Ma F, He S. Interferon‐mediated repression of
miR
‐324‐5p potentiates necroptosis to facilitate antiviral defense. EMBO Rep 2022; 23:e54438. [PMID: 35735238 PMCID: PMC9346494 DOI: 10.15252/embr.202154438] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2021] [Revised: 05/23/2022] [Accepted: 06/01/2022] [Indexed: 11/22/2022] Open
Abstract
Mixed lineage kinase domain‐like protein (MLKL) is the terminal effector of necroptosis, a form of regulated necrosis. Optimal activation of necroptosis, which eliminates infected cells, is critical for antiviral host defense. MicroRNAs (miRNAs) regulate the expression of genes involved in various biological and pathological processes. However, the roles of miRNAs in necroptosis‐associated host defense remain largely unknown. We screened a library of miRNAs and identified miR‐324‐5p as the most effective suppressor of necroptosis. MiR‐324‐5p downregulates human MLKL expression by specifically targeting the 3′UTR in a seed region‐independent manner. In response to interferons (IFNs), miR‐324‐5p is downregulated via the JAK/STAT signaling pathway, which removes the posttranscriptional suppression of MLKL mRNA and facilitates the activation of necroptosis. In influenza A virus (IAV)‐infected human primary macrophages, IFNs are induced, leading to the downregulation of miR‐324‐5p. MiR‐324‐5p overexpression attenuates IAV‐associated necroptosis and enhances viral replication, whereas deletion of miR‐324‐5p potentiates necroptosis and suppresses viral replication. Hence, miR‐324‐5p negatively regulates necroptosis by manipulating MLKL expression, and its downregulation by IFNs orchestrates optimal activation of necroptosis in host antiviral defense.
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Affiliation(s)
- Xiaoyan Dou
- Cyrus Tang Hematology Center and Collaborative Innovation Center of Hematology, Jiangsu Institute of Hematology Soochow University Suzhou China
| | - Xiaoliang Yu
- CAMS Key Laboratory of Synthetic Biology Regulatory Elements, Institute of Systems Medicine Chinese Academy of Medical Sciences & Peking Union Medical College Beijing China
- Suzhou Institute of Systems Medicine Suzhou China
| | - Shujing Du
- CAMS Key Laboratory of Synthetic Biology Regulatory Elements, Institute of Systems Medicine Chinese Academy of Medical Sciences & Peking Union Medical College Beijing China
- Suzhou Institute of Systems Medicine Suzhou China
| | - Yu Han
- CAMS Key Laboratory of Synthetic Biology Regulatory Elements, Institute of Systems Medicine Chinese Academy of Medical Sciences & Peking Union Medical College Beijing China
- Suzhou Institute of Systems Medicine Suzhou China
| | - Liang Li
- CAMS Key Laboratory of Synthetic Biology Regulatory Elements, Institute of Systems Medicine Chinese Academy of Medical Sciences & Peking Union Medical College Beijing China
- Suzhou Institute of Systems Medicine Suzhou China
| | - Haoran Zhang
- Cyrus Tang Hematology Center and Collaborative Innovation Center of Hematology, Jiangsu Institute of Hematology Soochow University Suzhou China
| | - Ying Yao
- Cyrus Tang Hematology Center and Collaborative Innovation Center of Hematology, Jiangsu Institute of Hematology Soochow University Suzhou China
- CAMS Key Laboratory of Synthetic Biology Regulatory Elements, Institute of Systems Medicine Chinese Academy of Medical Sciences & Peking Union Medical College Beijing China
- Suzhou Institute of Systems Medicine Suzhou China
| | - Yayun Du
- CAMS Key Laboratory of Synthetic Biology Regulatory Elements, Institute of Systems Medicine Chinese Academy of Medical Sciences & Peking Union Medical College Beijing China
- Suzhou Institute of Systems Medicine Suzhou China
| | - Xinhui Wang
- CAMS Key Laboratory of Synthetic Biology Regulatory Elements, Institute of Systems Medicine Chinese Academy of Medical Sciences & Peking Union Medical College Beijing China
- Suzhou Institute of Systems Medicine Suzhou China
| | - Jingjing Li
- CAMS Key Laboratory of Synthetic Biology Regulatory Elements, Institute of Systems Medicine Chinese Academy of Medical Sciences & Peking Union Medical College Beijing China
- Suzhou Institute of Systems Medicine Suzhou China
| | - Tao Yang
- CAMS Key Laboratory of Synthetic Biology Regulatory Elements, Institute of Systems Medicine Chinese Academy of Medical Sciences & Peking Union Medical College Beijing China
- Suzhou Institute of Systems Medicine Suzhou China
| | - Wei Zhang
- CAMS Key Laboratory of Synthetic Biology Regulatory Elements, Institute of Systems Medicine Chinese Academy of Medical Sciences & Peking Union Medical College Beijing China
- Suzhou Institute of Systems Medicine Suzhou China
| | - Chengkui Yang
- CAMS Key Laboratory of Synthetic Biology Regulatory Elements, Institute of Systems Medicine Chinese Academy of Medical Sciences & Peking Union Medical College Beijing China
- Suzhou Institute of Systems Medicine Suzhou China
| | - Feng Ma
- CAMS Key Laboratory of Synthetic Biology Regulatory Elements, Institute of Systems Medicine Chinese Academy of Medical Sciences & Peking Union Medical College Beijing China
- Suzhou Institute of Systems Medicine Suzhou China
| | - Sudan He
- Cyrus Tang Hematology Center and Collaborative Innovation Center of Hematology, Jiangsu Institute of Hematology Soochow University Suzhou China
- CAMS Key Laboratory of Synthetic Biology Regulatory Elements, Institute of Systems Medicine Chinese Academy of Medical Sciences & Peking Union Medical College Beijing China
- Suzhou Institute of Systems Medicine Suzhou China
- State Key Laboratory of Medical Molecular Biology, Institute of Basic Medical Sciences Chinese Academy of Medical Sciences & Peking Union Medical College Beijing China
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4
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Woo JH, Park SJ, Park SM, Joe E, Jou I. Interleukin‐6 signaling requires EHD1‐mediated alteration of membrane rafts. FEBS J 2022; 289:5914-5932. [DOI: 10.1111/febs.16458] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2021] [Revised: 02/25/2022] [Accepted: 04/12/2022] [Indexed: 01/09/2023]
Affiliation(s)
- Joo Hong Woo
- Inflamm‐aging Translational Research Center Ajou University School of Medicine Suwon Korea
| | - Soo Jung Park
- Inflamm‐aging Translational Research Center Ajou University School of Medicine Suwon Korea
| | - Sang Myun Park
- Department of Pharmacology Ajou University School of Medicine Suwon Korea
- Center for Convergence Research of Neurological Disorders Ajou University School of Medicine Suwon Korea
| | - Eun‐hye Joe
- Department of Pharmacology Ajou University School of Medicine Suwon Korea
- Center for Convergence Research of Neurological Disorders Ajou University School of Medicine Suwon Korea
| | - Ilo Jou
- Inflamm‐aging Translational Research Center Ajou University School of Medicine Suwon Korea
- Department of Pharmacology Ajou University School of Medicine Suwon Korea
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5
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Morana O, Nieto‐Garai JA, Björkholm P, Bernardino de la Serna J, Terrones O, Arboleya A, Ciceri D, Rojo‐Bartolomé I, Blouin CM, Lamaze C, Lorizate M, Contreras F. Identification of a New Cholesterol-Binding Site within the IFN-γ Receptor that is Required for Signal Transduction. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2022; 9:e2105170. [PMID: 35166455 PMCID: PMC9008429 DOI: 10.1002/advs.202105170] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/11/2021] [Revised: 01/26/2022] [Indexed: 05/05/2023]
Abstract
The cytokine interferon-gamma (IFN-γ) is a master regulator of innate and adaptive immunity involved in a broad array of human diseases that range from atherosclerosis to cancer. IFN-γ exerts it signaling action by binding to a specific cell surface receptor, the IFN-γ receptor (IFN-γR), whose activation critically depends on its partition into lipid nanodomains. However, little is known about the impact of specific lipids on IFN-γR signal transduction activity. Here, a new conserved cholesterol (chol) binding motif localized within its single transmembrane domain is identified. Through direct binding, chol drives the partition of IFN-γR2 chains into plasma membrane lipid nanodomains, orchestrating IFN-γR oligomerization and transmembrane signaling. Bioinformatics studies show that the signature sequence stands for a conserved chol-binding motif presented in many mammalian membrane proteins. The discovery of chol as the molecular switch governing IFN-γR transmembrane signaling represents a significant advance for understanding the mechanism of lipid selectivity by membrane proteins, but also for figuring out the role of lipids in modulating cell surface receptor function. Finally, this study suggests that inhibition of the chol-IFNγR2 interaction may represent a potential therapeutic strategy for various IFN-γ-dependent diseases.
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Affiliation(s)
- Ornella Morana
- Instituto Biofisika (UPV/EHU, CSIC)University of the Basque Country (UPV/EHU)Barrio Sarriena s/nLeioaE‐48940Spain
- Fundación Biofísica Bizkaia/Biofisika Bizkaia Fundazioa (FBB)University of the Basque Country (UPV/EHU)Barrio Sarriena s/nLeioaE‐48940Spain
- Department of Biochemistry and Molecular BiologyFaculty of Science and TechnologyUniversity of the Basque Country (UPV/EHU)Barrio Sarriena s/nLeioaE‐48940Spain
| | - Jon Ander Nieto‐Garai
- Instituto Biofisika (UPV/EHU, CSIC)University of the Basque Country (UPV/EHU)Barrio Sarriena s/nLeioaE‐48940Spain
- Fundación Biofísica Bizkaia/Biofisika Bizkaia Fundazioa (FBB)University of the Basque Country (UPV/EHU)Barrio Sarriena s/nLeioaE‐48940Spain
- Department of Biochemistry and Molecular BiologyFaculty of Science and TechnologyUniversity of the Basque Country (UPV/EHU)Barrio Sarriena s/nLeioaE‐48940Spain
| | - Patrik Björkholm
- Center for Biomembrane ResearchDepartment of Biochemistry and BiophysicsStockholm UniversityStockholmSE‐106 91Sweden
- Science for Life LaboratoryStockholm UniversitySolnaSE‐171 21Sweden
| | - Jorge Bernardino de la Serna
- National Heart and Lung InstituteFaculty of MedicineImperial College LondonSouth KensingtonSir Alexander Fleming BuildingLondonSW7 2AZUK
- Central Laser FacilityRutherford Appleton LaboratoryMRC‐Research Complex at HarwellScience and Technology Facilities CouncilHarwellOX11 0QXUK
- NIHR Imperial Biomedical Research CentreLondonSW7 2AZUK
| | - Oihana Terrones
- Department of Biochemistry and Molecular BiologyFaculty of Science and TechnologyUniversity of the Basque Country (UPV/EHU)Barrio Sarriena s/nLeioaE‐48940Spain
| | - Aroa Arboleya
- Instituto Biofisika (UPV/EHU, CSIC)University of the Basque Country (UPV/EHU)Barrio Sarriena s/nLeioaE‐48940Spain
- Fundación Biofísica Bizkaia/Biofisika Bizkaia Fundazioa (FBB)University of the Basque Country (UPV/EHU)Barrio Sarriena s/nLeioaE‐48940Spain
- Department of Biochemistry and Molecular BiologyFaculty of Science and TechnologyUniversity of the Basque Country (UPV/EHU)Barrio Sarriena s/nLeioaE‐48940Spain
| | - Dalila Ciceri
- Instituto Biofisika (UPV/EHU, CSIC)University of the Basque Country (UPV/EHU)Barrio Sarriena s/nLeioaE‐48940Spain
- Fundación Biofísica Bizkaia/Biofisika Bizkaia Fundazioa (FBB)University of the Basque Country (UPV/EHU)Barrio Sarriena s/nLeioaE‐48940Spain
- Department of Biochemistry and Molecular BiologyFaculty of Science and TechnologyUniversity of the Basque Country (UPV/EHU)Barrio Sarriena s/nLeioaE‐48940Spain
| | - Iratxe Rojo‐Bartolomé
- Instituto Biofisika (UPV/EHU, CSIC)University of the Basque Country (UPV/EHU)Barrio Sarriena s/nLeioaE‐48940Spain
- Fundación Biofísica Bizkaia/Biofisika Bizkaia Fundazioa (FBB)University of the Basque Country (UPV/EHU)Barrio Sarriena s/nLeioaE‐48940Spain
- Department of Biochemistry and Molecular BiologyFaculty of Science and TechnologyUniversity of the Basque Country (UPV/EHU)Barrio Sarriena s/nLeioaE‐48940Spain
| | - Cédric M. Blouin
- Institut Curie ‐ Centre de RecherchePSL Research UniversityMembrane Mechanics and Dynamics of Intracellular Signaling LaboratoryParis75248France
- Institut National de la Santé et de la Recherche Médicale (INSERM)ParisU1143France
- Centre National de la Recherche Scientifique (CNRS)UMR 3666Paris75248France
| | - Christophe Lamaze
- Institut Curie ‐ Centre de RecherchePSL Research UniversityMembrane Mechanics and Dynamics of Intracellular Signaling LaboratoryParis75248France
- Institut National de la Santé et de la Recherche Médicale (INSERM)ParisU1143France
- Centre National de la Recherche Scientifique (CNRS)UMR 3666Paris75248France
| | - Maier Lorizate
- Instituto Biofisika (UPV/EHU, CSIC)University of the Basque Country (UPV/EHU)Barrio Sarriena s/nLeioaE‐48940Spain
- Department of Biochemistry and Molecular BiologyFaculty of Science and TechnologyUniversity of the Basque Country (UPV/EHU)Barrio Sarriena s/nLeioaE‐48940Spain
| | - Francesc‐Xabier Contreras
- Instituto Biofisika (UPV/EHU, CSIC)University of the Basque Country (UPV/EHU)Barrio Sarriena s/nLeioaE‐48940Spain
- Department of Biochemistry and Molecular BiologyFaculty of Science and TechnologyUniversity of the Basque Country (UPV/EHU)Barrio Sarriena s/nLeioaE‐48940Spain
- IKERBASQUEBasque Foundation for ScienceBilbao48011Spain
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6
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Sotolongo Bellón J, Birkholz O, Richter CP, Eull F, Kenneweg H, Wilmes S, Rothbauer U, You C, Walter MR, Kurre R, Piehler J. Four-color single-molecule imaging with engineered tags resolves the molecular architecture of signaling complexes in the plasma membrane. CELL REPORTS METHODS 2022; 2:100165. [PMID: 35474965 PMCID: PMC9017138 DOI: 10.1016/j.crmeth.2022.100165] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/26/2021] [Revised: 11/19/2021] [Accepted: 01/13/2022] [Indexed: 12/22/2022]
Abstract
Localization and tracking of individual receptors by single-molecule imaging opens unique possibilities to unravel the assembly and dynamics of signaling complexes in the plasma membrane. We present a comprehensive workflow for imaging and analyzing receptor diffusion and interaction in live cells at single molecule level with up to four colors. Two engineered, monomeric GFP variants, which are orthogonally recognized by anti-GFP nanobodies, are employed for efficient and selective labeling of target proteins in the plasma membrane with photostable fluorescence dyes. This labeling technique enables us to quantitatively resolve the stoichiometry and dynamics of the interferon-γ (IFNγ) receptor signaling complex in the plasma membrane of living cells by multicolor single-molecule imaging. Based on versatile spatial and spatiotemporal correlation analyses, we identify ligand-induced receptor homo- and heterodimerization. Multicolor single-molecule co-tracking and quantitative single-molecule Förster resonance energy transfer moreover reveals transient assembly of IFNγ receptor heterotetramers and confirms its structural architecture.
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Affiliation(s)
- Junel Sotolongo Bellón
- Department of Biology and Center for Cellular Nanoanalytics (CellNanOs), Osnabrück University, Osnabrück, Germany
| | - Oliver Birkholz
- Department of Biology and Center for Cellular Nanoanalytics (CellNanOs), Osnabrück University, Osnabrück, Germany
| | - Christian P. Richter
- Department of Biology and Center for Cellular Nanoanalytics (CellNanOs), Osnabrück University, Osnabrück, Germany
| | - Florian Eull
- Department of Biology and Center for Cellular Nanoanalytics (CellNanOs), Osnabrück University, Osnabrück, Germany
| | - Hella Kenneweg
- Department of Biology and Center for Cellular Nanoanalytics (CellNanOs), Osnabrück University, Osnabrück, Germany
| | - Stephan Wilmes
- Department of Biology and Center for Cellular Nanoanalytics (CellNanOs), Osnabrück University, Osnabrück, Germany
- Division of Cell Signalling and Immunology, University of Dundee, School of Life Sciences, Dundee, UK
| | - Ulrich Rothbauer
- Pharmaceutical Biotechnology, Eberhard-Karls-University, Tübingen, Germany
- NMI Natural and Medical Sciences Institute at the University of Tübingen, Reutlingen, Germany
| | - Changjiang You
- Department of Biology and Center for Cellular Nanoanalytics (CellNanOs), Osnabrück University, Osnabrück, Germany
| | - Mark R. Walter
- Department of Microbiology, University of Alabama at Birmingham, Birmingham, AL, USA
| | - Rainer Kurre
- Department of Biology and Center for Cellular Nanoanalytics (CellNanOs), Osnabrück University, Osnabrück, Germany
| | - Jacob Piehler
- Department of Biology and Center for Cellular Nanoanalytics (CellNanOs), Osnabrück University, Osnabrück, Germany
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7
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Alhawmdeh M, Isreb M, Aziz A, Jacob BK, Anderson D, Najafzadeh M. Interferon-γ liposome: a new system to improve drug delivery in the treatment of lung cancer. ERJ Open Res 2021; 7:00555-2020. [PMID: 34435034 PMCID: PMC8381253 DOI: 10.1183/23120541.00555-2020] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2020] [Accepted: 03/23/2021] [Indexed: 11/11/2022] Open
Abstract
Lung cancer is one of the main causes of death worldwide. Published data show the use of interferons (IFNs) in treating lung tumours. IFNs also have potential for their antiproliferative, antiangiogenic, immunoregulatory and proapoptotic effects. IFN-γ functions as an anticancer agent against various forms of cancer. This study aimed to investigate the effect of IFN-γ liposome (nano) on peripheral lymphocytes from 20 individuals in each group: lung cancer patients compared to healthy individuals. The effectiveness of IFN-γ liposome against oxidative stress was also evaluated in this study. A concentration of 100 U·mL−1 of IFN-γ liposome was used to treat the lymphocytes in the Comet and micronucleus assays based on the preliminary test for the optimal dose. The lymphocytes from lung cancer patients presented with higher DNA damage levels than those of healthy individuals. In healthy individuals, IFN-γ liposome did not cause any DNA damage in the lymphocytes. Also, it caused a significant reduction in DNA damage in the lymphocytes from lung cancer patients in both the Comet and micronucleus assays. The 100 U·mL−1 of IFN-γ liposome significantly reduced the oxidative stress caused by H2O2 and appeared to be effective in both groups using the Comet and micronucleus assays. Results from both Comet and micronucleus assays were consistent. The data obtained indicated that IFN-γ in both forms (IFN-γ bulk and IFN-γ nanoliposome) may potentially be effective for the treatment of lung cancer and showed the ability of IFN-γ liposome to reduce DNA damage more than the bulk form. A research article on the effect of bulk and nanoliposome interferon-γ on lymphocytes from patients with lung cancer compared to healthy controls: assessing the ability of IFN-γ liposome to reduce DNA damage more than the bulk formhttps://bit.ly/3wvfSyY
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Affiliation(s)
- Maysa Alhawmdeh
- Division of Medical Sciences, Faculty of Life Sciences, University of Bradford, Bradford, UK
| | - Mohammad Isreb
- Faculty of Life Sciences, School of Pharmacy, University of Bradford, Bradford, UK
| | - Abid Aziz
- Bradford Royal Infirmary, Bradford Teaching Hospitals NHS Foundation Trust, Bradford, UK
| | - Badie K Jacob
- Bradford Royal Infirmary, Bradford Teaching Hospitals NHS Foundation Trust, Bradford, UK
| | - Diana Anderson
- Division of Medical Sciences, Faculty of Life Sciences, University of Bradford, Bradford, UK
| | - Mojgan Najafzadeh
- Division of Medical Sciences, Faculty of Life Sciences, University of Bradford, Bradford, UK
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8
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Wilmes S, Hafer M, Vuorio J, Tucker JA, Winkelmann H, Löchte S, Stanly TA, Pulgar Prieto KD, Poojari C, Sharma V, Richter CP, Kurre R, Hubbard SR, Garcia KC, Moraga I, Vattulainen I, Hitchcock IS, Piehler J. Mechanism of homodimeric cytokine receptor activation and dysregulation by oncogenic mutations. Science 2020; 367:643-652. [PMID: 32029621 PMCID: PMC8117407 DOI: 10.1126/science.aaw3242] [Citation(s) in RCA: 87] [Impact Index Per Article: 21.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2018] [Revised: 10/08/2019] [Accepted: 12/20/2019] [Indexed: 12/11/2022]
Abstract
Homodimeric class I cytokine receptors are assumed to exist as preformed dimers that are activated by ligand-induced conformational changes. We quantified the dimerization of three prototypic class I cytokine receptors in the plasma membrane of living cells by single-molecule fluorescence microscopy. Spatial and spatiotemporal correlation of individual receptor subunits showed ligand-induced dimerization and revealed that the associated Janus kinase 2 (JAK2) dimerizes through its pseudokinase domain. Oncogenic receptor and hyperactive JAK2 mutants promoted ligand-independent dimerization, highlighting the formation of receptor dimers as the switch responsible for signal activation. Atomistic modeling and molecular dynamics simulations based on a detailed energetic analysis of the interactions involved in dimerization yielded a mechanistic blueprint for homodimeric class I cytokine receptor activation and its dysregulation by individual mutations.
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Affiliation(s)
- Stephan Wilmes
- Department of Biology and Center of Cellular Nanoanalytics, University of Osnabrück, 49076 Osnabrück, Germany
- Division of Cell Signalling and Immunology, School of Life Sciences, University of Dundee, Dundee, UK
| | - Maximillian Hafer
- Department of Biology and Center of Cellular Nanoanalytics, University of Osnabrück, 49076 Osnabrück, Germany
| | - Joni Vuorio
- Department of Physics, University of Helsinki, Helsinki, Finland
- Computational Physics Laboratory, Tampere University, Tampere, Finland
| | - Julie A Tucker
- York Biomedical Research Institute and Department of Biology, University of York, Heslington, York YO10 5DD, UK
| | - Hauke Winkelmann
- Department of Biology and Center of Cellular Nanoanalytics, University of Osnabrück, 49076 Osnabrück, Germany
| | - Sara Löchte
- Department of Biology and Center of Cellular Nanoanalytics, University of Osnabrück, 49076 Osnabrück, Germany
| | - Tess A Stanly
- York Biomedical Research Institute and Department of Biology, University of York, Heslington, York YO10 5DD, UK
| | - Katiuska D Pulgar Prieto
- York Biomedical Research Institute and Department of Biology, University of York, Heslington, York YO10 5DD, UK
| | - Chetan Poojari
- Department of Physics, University of Helsinki, Helsinki, Finland
| | - Vivek Sharma
- Department of Physics, University of Helsinki, Helsinki, Finland
- Institute of Biotechnology, University of Helsinki, Helsinki, Finland
| | - Christian P Richter
- Department of Biology and Center of Cellular Nanoanalytics, University of Osnabrück, 49076 Osnabrück, Germany
| | - Rainer Kurre
- Department of Biology and Center of Cellular Nanoanalytics, University of Osnabrück, 49076 Osnabrück, Germany
| | - Stevan R Hubbard
- Skirball Institute and Department of Biochemistry and Molecular Pharmacology, New York University School of Medicine, New York, NY, USA
| | - K Christopher Garcia
- Howard Hughes Medical Institute, Stanford University School of Medicine, Stanford, CA, USA
- Department of Molecular and Cellular Physiology and Department of Structural Biology, Stanford University School of Medicine, Stanford, CA, USA
| | - Ignacio Moraga
- Division of Cell Signalling and Immunology, School of Life Sciences, University of Dundee, Dundee, UK
| | - Ilpo Vattulainen
- Department of Physics, University of Helsinki, Helsinki, Finland.
- Computational Physics Laboratory, Tampere University, Tampere, Finland
| | - Ian S Hitchcock
- York Biomedical Research Institute and Department of Biology, University of York, Heslington, York YO10 5DD, UK.
| | - Jacob Piehler
- Department of Biology and Center of Cellular Nanoanalytics, University of Osnabrück, 49076 Osnabrück, Germany.
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9
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Kulling PM, Olson KC, Hamele CE, Toro MF, Tan SF, Feith DJ, Loughran TP. Dysregulation of the IFN-γ-STAT1 signaling pathway in a cell line model of large granular lymphocyte leukemia. PLoS One 2018; 13:e0193429. [PMID: 29474442 PMCID: PMC5825082 DOI: 10.1371/journal.pone.0193429] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2017] [Accepted: 02/09/2018] [Indexed: 02/04/2023] Open
Abstract
T cell large granular lymphocyte leukemia (T-LGLL) is a rare incurable disease that is characterized by defective apoptosis of cytotoxic CD8+ T cells. Chronic activation of the Janus Kinase-Signal Transducer and Activator of Transcription (JAK-STAT) pathway is a hallmark of T-LGLL. One manifestation is the constitutive phosphorylation of tyrosine 701 of STAT1 (p-STAT1). T-LGLL patients also exhibit elevated serum levels of the STAT1 activator, interferon-γ (IFN-γ), thus contributing to an inflammatory environment. In normal cells, IFN-γ production is tightly controlled through induction of IFN-γ negative regulators. However, in T-LGLL, IFN-γ signaling lacks this negative feedback mechanism as evidenced by excessive IFN-γ production and decreased levels of suppressors of cytokine signaling 1 (SOCS1), a negative regulator of IFN-γ. Here we characterize the IFN-γ-STAT1 pathway in TL-1 cells, a cell line model of T-LGLL. TL-1 cells exhibited lower IFN-γ receptor protein and mRNA expression compared to an IFN-γ responsive cell line. Furthermore, IFN-γ treatment did not induce JAK2 or STAT1 activation or transcription of IFN-γ-inducible gene targets. However, IFN-β induced p-STAT1 and subsequent STAT1 gene transcription, demonstrating a specific IFN-γ signaling defect in TL-1 cells. We utilized siRNA targeting of STAT1, STAT3, and STAT5b to probe their role in IL-2-mediated IFN-γ regulation. These studies identified STAT5b as a positive regulator of IFN-γ production. We also characterized the relationship between STAT1, STAT3, and STAT5b proteins. Surprisingly, p-STAT1 was positively correlated with STAT3 levels while STAT5b suppressed the activation of both STAT1 and STAT3. Taken together, these results suggest that the dysregulation of the IFN-γ-STAT1 signaling pathway in TL-1 cells likely results from low levels of the IFN-γ receptor. The resulting inability to induce negative feedback regulators explains the observed elevated IL-2 driven IFN-γ production. Future work will elucidate the best way to target this pathway, with the ultimate goal to find a better therapeutic for T-LGLL.
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Affiliation(s)
- Paige M. Kulling
- University of Virginia Cancer Center, University of Virginia; Charlottesville, VA United States of America
- Department of Medicine, Division of Hematology/Oncology, University of Virginia; Charlottesville, VA United States of America
- Department of Pathology, University of Virginia; Charlottesville, VA United States of America
| | - Kristine C. Olson
- University of Virginia Cancer Center, University of Virginia; Charlottesville, VA United States of America
- Department of Medicine, Division of Hematology/Oncology, University of Virginia; Charlottesville, VA United States of America
| | - Cait E. Hamele
- University of Virginia Cancer Center, University of Virginia; Charlottesville, VA United States of America
- Department of Medicine, Division of Hematology/Oncology, University of Virginia; Charlottesville, VA United States of America
| | - Mariella F. Toro
- University of Virginia Cancer Center, University of Virginia; Charlottesville, VA United States of America
- Department of Medicine, Division of Hematology/Oncology, University of Virginia; Charlottesville, VA United States of America
| | - Su-Fern Tan
- University of Virginia Cancer Center, University of Virginia; Charlottesville, VA United States of America
- Department of Medicine, Division of Hematology/Oncology, University of Virginia; Charlottesville, VA United States of America
| | - David J. Feith
- University of Virginia Cancer Center, University of Virginia; Charlottesville, VA United States of America
- Department of Medicine, Division of Hematology/Oncology, University of Virginia; Charlottesville, VA United States of America
| | - Thomas P. Loughran
- University of Virginia Cancer Center, University of Virginia; Charlottesville, VA United States of America
- Department of Medicine, Division of Hematology/Oncology, University of Virginia; Charlottesville, VA United States of America
- * E-mail:
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10
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van de Vosse E, van Dissel JT. IFN-γR1 defects: Mutation update and description of the IFNGR1 variation database. Hum Mutat 2017; 38:1286-1296. [PMID: 28744922 DOI: 10.1002/humu.23302] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2017] [Revised: 07/20/2017] [Accepted: 07/23/2017] [Indexed: 12/29/2022]
Abstract
IFN-γ signaling is essential for the innate immune defense against mycobacterial infections. IFN-γ signals through the IFN-γ receptor, which consists of a tetramer of two IFN-γR1 chains in complex with two IFN-γR2 chains, where IFN-γR1 is the ligand-binding chain of the interferon-γ receptor and IFN-γR2 is the signal-transducing chain of the IFN-γ receptor. Germline mutations in the gene IFNGR1 encoding the IFN-γR1 cause a primary immunodeficiency that mainly leads to mycobacterial infections. Here, we review the molecular basis of this immunodeficiency in the 130 individuals described to date, and report mutations in five new individuals, bringing the total number to 135 individuals from 98 kindreds. Forty unique IFNGR1 mutations have been reported and they exert either an autosomal dominant or an autosomal recessive effect. Mutations resulting in premature stopcodons represent the majority of IFNGR1 mutations (60%; 24 out of 40), followed by amino acid substitutions (28%, 11 out of 40). All known mutations, as well as 287 other variations, have been deposited in the online IFNGR1 variation database (www.LOVD.nl/IFNGR1). In this article, we review the function of IFN-γR1 and molecular genetics of human IFNGR1.
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Affiliation(s)
- Esther van de Vosse
- Department of Infectious Diseases, Leiden University Medical Center, Leiden, The Netherlands
| | - Jaap T van Dissel
- Department of Infectious Diseases, Leiden University Medical Center, Leiden, The Netherlands
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11
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Green DS, Young HA, Valencia JC. Current prospects of type II interferon γ signaling and autoimmunity. J Biol Chem 2017; 292:13925-13933. [PMID: 28652404 PMCID: PMC5572907 DOI: 10.1074/jbc.r116.774745] [Citation(s) in RCA: 102] [Impact Index Per Article: 14.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Interferon γ (IFNγ) is a pleiotropic protein secreted by immune cells. IFNγ signals through the IFNγ receptor, a protein complex that mediates downstream signaling events. Studies into IFNγ signaling have provided insight into the general concepts of receptor signaling, receptor internalization, regulation of distinct signaling pathways, and transcriptional regulation. Although IFNγ is the central mediator of the adaptive immune response to pathogens, it has been shown to be involved in several non-infectious physiological processes. This review will provide an introduction into IFNγ signaling biology and the functional roles of IFNγ in the autoimmune response.
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Affiliation(s)
- Daniel S Green
- From the Women's Malignancy Branch, Translational Genomics Section, Center for Cancer, NCI, National Institutes of Health, Bethesda, Maryland 20892
| | - Howard A Young
- Cancer and Inflammation Program, Center for Cancer Research, NCI-Frederick, National Institutes of Health, Frederick, Maryland 21702-1201.
| | - Julio C Valencia
- Cancer and Inflammation Program, Center for Cancer Research, NCI-Frederick, National Institutes of Health, Frederick, Maryland 21702-1201.
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12
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Li H, Sharma N, General IJ, Schreiber G, Bahar I. Dynamic Modulation of Binding Affinity as a Mechanism for Regulating Interferon Signaling. J Mol Biol 2017; 429:2571-2589. [PMID: 28648616 PMCID: PMC5545807 DOI: 10.1016/j.jmb.2017.06.011] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2017] [Revised: 06/15/2017] [Accepted: 06/16/2017] [Indexed: 12/22/2022]
Abstract
How structural dynamics affects cytokine signaling is under debate. Here, we investigated the dynamics of the type I interferon (IFN) receptor, IFNAR1, and its effect on signaling upon binding IFN and IFNAR2 using a combination of structure-based mechanistic studies, in situ binding, and gene induction assays. Our study reveals that IFNAR1 flexibility modulates ligand-binding affinity, which, in turn, regulates biological signaling. We identified the hinge sites and key interactions implicated in IFNAR1 inter-subdomain (SD1-SD4) movements. We showed that the predicted cooperative movements are essential to accommodate intermolecular interactions. Engineered disulfide bridges, computationally predicted to interfere with IFNAR1 dynamics, were experimentally confirmed. Notably, introducing disulfide bonds between subdomains SD2 and SD3 modulated IFN binding and activity in accordance with the relative attenuation of cooperative movements with varying distance from the hinge center, whereas locking the SD3-SD4 interface flexibility in favor of an extended conformer increased activity.
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Affiliation(s)
- Hongchun Li
- Department of Computational and Systems Biology, School of Medicine, University of Pittsburgh, Pittsburgh, PA 15213, USA
| | - Nanaocha Sharma
- Department of Biomolecular Sciences, Weizmann Institute of Science, Rehovot 76100, Israel
| | - Ignacio J General
- Department of Computational and Systems Biology, School of Medicine, University of Pittsburgh, Pittsburgh, PA 15213, USA; School of Science and Technology, and CONICET, Universidad Nacional de San Martin, San Martin, Buenos Aires 1650, Argentina
| | - Gideon Schreiber
- Department of Biomolecular Sciences, Weizmann Institute of Science, Rehovot 76100, Israel.
| | - Ivet Bahar
- Department of Computational and Systems Biology, School of Medicine, University of Pittsburgh, Pittsburgh, PA 15213, USA.
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13
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Mikulecký P, Zahradník J, Kolenko P, Černý J, Charnavets T, Kolářová L, Nečasová I, Pham PN, Schneider B. Crystal structure of human interferon-γ receptor 2 reveals the structural basis for receptor specificity. Acta Crystallogr D Struct Biol 2016; 72:1017-25. [PMID: 27599734 PMCID: PMC5013595 DOI: 10.1107/s2059798316012237] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2016] [Accepted: 07/27/2016] [Indexed: 11/10/2022] Open
Abstract
Interferon-γ receptor 2 is a cell-surface receptor that is required for interferon-γ signalling and therefore plays a critical immunoregulatory role in innate and adaptive immunity against viral and also bacterial and protozoal infections. A crystal structure of the extracellular part of human interferon-γ receptor 2 (IFNγR2) was solved by molecular replacement at 1.8 Å resolution. Similar to other class 2 receptors, IFNγR2 has two fibronectin type III domains. The characteristic structural features of IFNγR2 are concentrated in its N-terminal domain: an extensive π-cation motif of stacked residues KWRWRH, a NAG-W-NAG sandwich (where NAG stands for N-acetyl-D-glucosamine) and finally a helix formed by residues 78-85, which is unique among class 2 receptors. Mass spectrometry and mutational analyses showed the importance of N-linked glycosylation to the stability of the protein and confirmed the presence of two disulfide bonds. Structure-based bioinformatic analysis revealed independent evolutionary behaviour of both receptor domains and, together with multiple sequence alignment, identified putative binding sites for interferon-γ and receptor 1, the ligands of IFNγR2.
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Affiliation(s)
- Pavel Mikulecký
- Institute of Biotechnology CAS, BIOCEV, Prumyslova 595, 252 50 Vestec, Czech Republic
| | - Jirí Zahradník
- Institute of Biotechnology CAS, BIOCEV, Prumyslova 595, 252 50 Vestec, Czech Republic
| | - Petr Kolenko
- Institute of Biotechnology CAS, BIOCEV, Prumyslova 595, 252 50 Vestec, Czech Republic
| | - Jiří Černý
- Institute of Biotechnology CAS, BIOCEV, Prumyslova 595, 252 50 Vestec, Czech Republic
| | - Tatsiana Charnavets
- Institute of Biotechnology CAS, BIOCEV, Prumyslova 595, 252 50 Vestec, Czech Republic
| | - Lucie Kolářová
- Institute of Biotechnology CAS, BIOCEV, Prumyslova 595, 252 50 Vestec, Czech Republic
| | - Iva Nečasová
- Institute of Biotechnology CAS, BIOCEV, Prumyslova 595, 252 50 Vestec, Czech Republic
| | - Phuong Ngoc Pham
- Institute of Biotechnology CAS, BIOCEV, Prumyslova 595, 252 50 Vestec, Czech Republic
| | - Bohdan Schneider
- Institute of Biotechnology CAS, BIOCEV, Prumyslova 595, 252 50 Vestec, Czech Republic
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14
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Blouin CM, Hamon Y, Gonnord P, Boularan C, Kagan J, Viaris de Lesegno C, Ruez R, Mailfert S, Bertaux N, Loew D, Wunder C, Johannes L, Vogt G, Contreras FX, Marguet D, Casanova JL, Galès C, He HT, Lamaze C. Glycosylation-Dependent IFN-γR Partitioning in Lipid and Actin Nanodomains Is Critical for JAK Activation. Cell 2016; 166:920-934. [PMID: 27499022 DOI: 10.1016/j.cell.2016.07.003] [Citation(s) in RCA: 88] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2015] [Revised: 04/21/2016] [Accepted: 07/05/2016] [Indexed: 02/04/2023]
Abstract
Understanding how membrane nanoscale organization controls transmembrane receptors signaling activity remains a challenge. We studied interferon-γ receptor (IFN-γR) signaling in fibroblasts from homozygous patients with a T168N mutation in IFNGR2. By adding a neo-N-glycan on IFN-γR2 subunit, this mutation blocks IFN-γ activity by unknown mechanisms. We show that the lateral diffusion of IFN-γR2 is confined by sphingolipid/cholesterol nanodomains. In contrast, the IFN-γR2 T168N mutant diffusion is confined by distinct actin nanodomains where conformational changes required for Janus-activated tyrosine kinase/signal transducer and activator of transcription (JAK/STAT) activation by IFN-γ could not occur. Removing IFN-γR2 T168N-bound galectins restored lateral diffusion in lipid nanodomains and JAK/STAT signaling in patient cells, whereas adding galectins impaired these processes in control cells. These experiments prove the critical role of dynamic receptor interactions with actin and lipid nanodomains and reveal a new function for receptor glycosylation and galectins. Our study establishes the physiological relevance of membrane nanodomains in the control of transmembrane receptor signaling in vivo. VIDEO ABSTRACT.
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Affiliation(s)
- Cédric M Blouin
- Institut Curie, PSL Research University, CNRS UMR3666, INSERM U1143, 75005 Paris, France
| | - Yannick Hamon
- Centre d'Immunologie de Marseille-Luminy, Aix Marseille Université, Inserm, CNRS, Marseille, France
| | - Pauline Gonnord
- Centre de Physiologie Toulouse-Purpan (CPTP), INSERM U1043, 31300 Toulouse, France
| | - Cédric Boularan
- Institut des Maladies Métaboliques et Cardiovasculaires, Université Toulouse III Paul Sabatier, INSERM U1048, 31432 Toulouse, France
| | - Jérémy Kagan
- Institut Curie, PSL Research University, CNRS UMR3666, INSERM U1143, 75005 Paris, France
| | | | - Richard Ruez
- Institut Curie, PSL Research University, CNRS UMR3666, INSERM U1143, 75005 Paris, France
| | - Sébastien Mailfert
- Centre d'Immunologie de Marseille-Luminy, Aix Marseille Université, Inserm, CNRS, Marseille, France
| | - Nicolas Bertaux
- Institut Fresnel, Aix Marseille Université, Centrale Marseille, CNRS, Marseille, France
| | - Damarys Loew
- Proteomics and Mass Spectrometry Laboratory, Institut Curie, PSL Research University, 75005 Paris, France
| | - Christian Wunder
- Institut Curie, PSL Research University, CNRS UMR3666, INSERM U1143, 75005 Paris, France
| | - Ludger Johannes
- Institut Curie, PSL Research University, CNRS UMR3666, INSERM U1143, 75005 Paris, France
| | - Guillaume Vogt
- St. Giles Laboratory of Human Genetics of Infectious Diseases, Rockefeller Branch, The Rockefeller University, New York, NY 10065, USA; Laboratory of Human Genetics of Infectious Diseases, Necker Branch, Necker Hospital for Sick Children, Imagine Institute, INSERM UMR1163, 75015 Paris, France; University Paris Descartes, 75006 Paris, France
| | - Francesc-Xabier Contreras
- Instituto Biofísica (UPV/EHU, CSIC), P.O. Box 644, 48080 Bilbao, Spain; Departamento de Bioquímica y Biologia Molecular, Universidad del País Vasco, P.O. Box 644, 48080 Bilbao, Spain; IKERBASQUE, Basque Foundation for Science, 48011 Bilbao, Spain
| | - Didier Marguet
- Centre d'Immunologie de Marseille-Luminy, Aix Marseille Université, Inserm, CNRS, Marseille, France
| | - Jean-Laurent Casanova
- St. Giles Laboratory of Human Genetics of Infectious Diseases, Rockefeller Branch, The Rockefeller University, New York, NY 10065, USA; Laboratory of Human Genetics of Infectious Diseases, Necker Branch, Necker Hospital for Sick Children, Imagine Institute, INSERM UMR1163, 75015 Paris, France; University Paris Descartes, 75006 Paris, France; Howard Hughes Medical Institute, New York, NY 10065, USA; Pediatric Hematology-Immunology Unit, Necker Hospital for Sick Children, 75015 Paris, France
| | - Céline Galès
- Institut des Maladies Métaboliques et Cardiovasculaires, Université Toulouse III Paul Sabatier, INSERM U1048, 31432 Toulouse, France
| | - Hai-Tao He
- Centre d'Immunologie de Marseille-Luminy, Aix Marseille Université, Inserm, CNRS, Marseille, France.
| | - Christophe Lamaze
- Institut Curie, PSL Research University, CNRS UMR3666, INSERM U1143, 75005 Paris, France.
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15
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Sharma N, Longjam G, Schreiber G. Type I Interferon Signaling Is Decoupled from Specific Receptor Orientation through Lenient Requirements of the Transmembrane Domain. J Biol Chem 2015; 291:3371-84. [PMID: 26679999 DOI: 10.1074/jbc.m115.686071] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2015] [Indexed: 01/09/2023] Open
Abstract
Type I interferons serve as the first line of defense against pathogen invasion. Binding of IFNs to its receptors, IFNAR1 and IFNAR2, is leading to activation of the IFN response. To determine whether structural perturbations observed during binding are propagated to the cytoplasmic domain, multiple mutations were introduced into the transmembrane helix and its surroundings. Insertion of one to five alanine residues near either the N or C terminus of the transmembrane domain (TMD) likely promotes a rotation of 100° and a translation of 1.5 Å per added residue. Surprisingly, the added alanines had little effect on the binding affinity of IFN to the cell surface receptors, STAT phosphorylation, or gene induction. Similarly, substitution of the juxtamembrane residues of the TMD with alanines, or replacement of the TMD of IFNAR1 with that of IFNAR2, did not affect IFN binding or activity. Finally, only the addition of 10 serine residues (but not 2 or 4) between the extracellular domain of IFNAR1 and the TMD had some effect on signaling. Bioinformatic analysis shows a correlation between high sequence conservation of TMDs of cytokine receptors and the ability to transmit structural signals. Sequence conservation near the TMD of IFNAR1 is low, suggesting limited functional importance for this region. Our results suggest that IFN binding to the extracellular domains of IFNAR1 and IFNAR2 promotes proximity between the intracellular domains and that differential signaling is a function of duration of activation and affinity of binding rather than specific conformational changes transmitted from the outside to the inside of the cell.
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Affiliation(s)
- Nanaocha Sharma
- From the Department of Biological Chemistry, Weizmann Institute of Science, Rehovot 76100, Israel
| | - Geeta Longjam
- From the Department of Biological Chemistry, Weizmann Institute of Science, Rehovot 76100, Israel
| | - Gideon Schreiber
- From the Department of Biological Chemistry, Weizmann Institute of Science, Rehovot 76100, Israel
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16
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Wilmes S, Beutel O, Li Z, Francois-Newton V, Richter CP, Janning D, Kroll C, Hanhart P, Hötte K, You C, Uzé G, Pellegrini S, Piehler J. Receptor dimerization dynamics as a regulatory valve for plasticity of type I interferon signaling. ACTA ACUST UNITED AC 2015; 209:579-93. [PMID: 26008745 PMCID: PMC4442803 DOI: 10.1083/jcb.201412049] [Citation(s) in RCA: 88] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Type I interferons (IFNs) activate differential cellular responses through a shared cell surface receptor composed of the two subunits, IFNAR1 and IFNAR2. We propose here a mechanistic model for how IFN receptor plasticity is regulated on the level of receptor dimerization. Quantitative single-molecule imaging of receptor assembly in the plasma membrane of living cells clearly identified IFN-induced dimerization of IFNAR1 and IFNAR2. The negative feedback regulator ubiquitin-specific protease 18 (USP18) potently interferes with the recruitment of IFNAR1 into the ternary complex, probably by impeding complex stabilization related to the associated Janus kinases. Thus, the responsiveness to IFNα2 is potently down-regulated after the first wave of gene induction, while IFNβ, due to its ∼100-fold higher binding affinity, is still able to efficiently recruit IFNAR1. Consistent with functional data, this novel regulatory mechanism at the level of receptor assembly explains how signaling by IFNβ is maintained over longer times compared with IFNα2 as a temporally encoded cause of functional receptor plasticity.
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Affiliation(s)
- Stephan Wilmes
- Department of Biology, Division of Biophysics, University of Osnabrück, 49074 Osnabrück, Germany
| | - Oliver Beutel
- Department of Biology, Division of Biophysics, University of Osnabrück, 49074 Osnabrück, Germany
| | - Zhi Li
- Institut Pasteur, Cytokine Signaling Unit, Centre National de la Recherche Scientifique URA1961, 75724 Paris, France
| | - Véronique Francois-Newton
- Institut Pasteur, Cytokine Signaling Unit, Centre National de la Recherche Scientifique URA1961, 75724 Paris, France
| | - Christian P Richter
- Department of Biology, Division of Biophysics, University of Osnabrück, 49074 Osnabrück, Germany
| | - Dennis Janning
- Department of Biology, Division of Biophysics, University of Osnabrück, 49074 Osnabrück, Germany
| | - Cindy Kroll
- Department of Biology, Division of Biophysics, University of Osnabrück, 49074 Osnabrück, Germany
| | - Patrizia Hanhart
- Department of Biology, Division of Biophysics, University of Osnabrück, 49074 Osnabrück, Germany
| | - Katharina Hötte
- Department of Biology, Division of Biophysics, University of Osnabrück, 49074 Osnabrück, Germany
| | - Changjiang You
- Department of Biology, Division of Biophysics, University of Osnabrück, 49074 Osnabrück, Germany
| | - Gilles Uzé
- Centre National de la Recherche Scientifique Montpellier, 34095 Montpellier, France
| | - Sandra Pellegrini
- Institut Pasteur, Cytokine Signaling Unit, Centre National de la Recherche Scientifique URA1961, 75724 Paris, France
| | - Jacob Piehler
- Department of Biology, Division of Biophysics, University of Osnabrück, 49074 Osnabrück, Germany
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17
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The molecular basis for functional plasticity in type I interferon signaling. Trends Immunol 2015; 36:139-49. [DOI: 10.1016/j.it.2015.01.002] [Citation(s) in RCA: 136] [Impact Index Per Article: 15.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2014] [Revised: 01/13/2015] [Accepted: 01/13/2015] [Indexed: 01/16/2023]
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18
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Roder F, Wilmes S, Richter CP, Piehler J. Rapid transfer of transmembrane proteins for single molecule dimerization assays in polymer-supported membranes. ACS Chem Biol 2014; 9:2479-84. [PMID: 25203456 DOI: 10.1021/cb5005806] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
Dimerization of transmembrane receptors is a key regulatory factor in cellular communication, which has remained challenging to study under well-defined conditions in vitro. We developed a novel strategy to explore membrane protein interactions in a controlled lipid environment requiring minute sample quantities. By rapid transfer of transmembrane proteins from mammalian cells into polymer-supported membranes, membrane proteins could be efficiently fluorescence labeled and reconstituted with very low background. Thus, differential ligand-induced dimerization of the type I interferon (IFN) receptor subunits IFNAR1 and IFNAR2 could be probed quantitatively at physiologically relevant concentrations by single molecule imaging. These measurements clearly support a regulatory role of the affinity of IFNs toward IFNAR1 for controlling the level of receptor dimerization.
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Affiliation(s)
- Friedrich Roder
- Division
of Biophysics, Department
of Biology, University of Osnabrück, Barbarastr. 11, 49076 Osnabrück, Germany
| | - Stephan Wilmes
- Division
of Biophysics, Department
of Biology, University of Osnabrück, Barbarastr. 11, 49076 Osnabrück, Germany
| | - Christian P. Richter
- Division
of Biophysics, Department
of Biology, University of Osnabrück, Barbarastr. 11, 49076 Osnabrück, Germany
| | - Jacob Piehler
- Division
of Biophysics, Department
of Biology, University of Osnabrück, Barbarastr. 11, 49076 Osnabrück, Germany
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19
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Lasfar A, Cook JR, Cohen Solal KA, Reuhl K, Kotenko SV, Langer JA, Laskin DL. Critical role of the endogenous interferon ligand-receptors in type I and type II interferons response. Immunology 2014; 142:442-52. [PMID: 24597649 DOI: 10.1111/imm.12273] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2013] [Revised: 02/18/2014] [Accepted: 02/19/2014] [Indexed: 01/12/2023] Open
Abstract
Separate ligand-receptor paradigms are commonly used for each type of interferon (IFN). However, accumulating evidence suggests that type I and type II IFNs may not be restricted to independent pathways. Using different cell types deficient in IFNAR1, IFNAR2, IFNGR1, IFNGR2 and IFN-γ, we evaluated the contribution of each element of the IFN system to the activity of type I and type II IFNs. We show that deficiency in IFNAR1 or IFNAR2 is associated with impairment of type II IFN activity. This impairment, presumably resulting from the disruption of the ligand-receptor complex, is obtained in all cell types tested. However, deficiency of IFNGR1, IFNGR2 or IFN-γ was associated with an impairment of type I IFN activity in spleen cells only, correlating with the constitutive expression of type II IFN (IFN-γ) observed on those cells. Therefore, in vitro the constitutive expression of both the receptors and the ligands of type I or type II IFN is critical for the enhancement of the IFN activity. Any IFN deficiency can totally or partially impair IFN activity, suggesting the importance of type I and type II IFN interactions. Taken together, our results suggest that type I and type II IFNs may regulate biological activities through distinct as well as common IFN receptor complexes.
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Affiliation(s)
- Ahmed Lasfar
- Department of Pharmacology and Toxicology, Ernest Mario School of Pharmacy, Rutgers, the State University of New Jersey, Piscataway, NJ, USA; Rutgers Cancer Institute of New Jersey, New Brunswick, NJ, USA
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20
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Chapat C, Corbo L. Novel roles of the CCR4-NOT complex. WILEY INTERDISCIPLINARY REVIEWS-RNA 2014; 5:883-901. [PMID: 25044499 DOI: 10.1002/wrna.1254] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/27/2013] [Revised: 06/02/2014] [Accepted: 06/04/2014] [Indexed: 12/21/2022]
Abstract
The CCR4-NOT complex is a multi-subunit protein complex evolutionarily conserved across eukaryotes which regulates several aspects of gene expression. A fascinating model is emerging in which this complex acts as a regulation platform, controlling gene products 'from birth to death' through the coordination of different cellular machineries involved in diverse cellular functions. Recently the CCR4-NOT functions have been extended to the control of the innate immune response through the regulation of interferon signaling. Thus, a more comprehensive picture of how CCR4-NOT allows the rapid adaptation of cells to external stress, from transcription to mRNA and protein decay, is presented and discussed here. Overall, CCR4-NOT permits the efficient and rapid adaptation of cellular gene expression in response to changes in environmental conditions and stimuli.
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Affiliation(s)
- Clément Chapat
- Université Lyon 1, Lyon, France; CNRS UMR 5286, Lyon, France; Inserm U1052, Lyon, France; Cancer Research Center of Lyon, Centre Léon Bérard, Lyon, France
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21
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Lee EY, Schultz KLW, Griffin DE. Mice deficient in interferon-gamma or interferon-gamma receptor 1 have distinct inflammatory responses to acute viral encephalomyelitis. PLoS One 2013; 8:e76412. [PMID: 24204622 PMCID: PMC3811984 DOI: 10.1371/journal.pone.0076412] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2013] [Accepted: 08/23/2013] [Indexed: 11/25/2022] Open
Abstract
Interferon (IFN)-gamma is an important component of the immune response to viral infections that can have a role both in controlling virus replication and inducing inflammatory damage. To determine the role of IFN-gamma in fatal alphavirus encephalitis, we have compared the responses of wild type C57BL/6 (WTB6) mice with mice deficient in either IFN-gamma (GKO) or the alpha-chain of the IFN-gamma receptor (GRKO) after intranasal infection with a neuroadapted strain of sindbis virus. Mortalities of GKO and GRKO mice were similar to WTB6 mice. Both GKO and GRKO mice had delayed virus clearance from the brain and spinal cord, more infiltrating perforin(+) cells and lower levels of tumor necrosis factor (TNF)-alpha and interleukin (IL)-6 mRNAs than WTB6 mice. However, inflammation was more intense in GRKO mice than WTB6 or GKO mice with more infiltrating CD3(+) T cells, greater expression of major histocompatibility complex-II and higher levels of interleukin-17A mRNA. Fibroblasts from GRKO embryos did not develop an antiviral response after treatment with IFN-gamma, but showed increases in TNF-alpha, IL-6, CXCL9 and CXCL10 mRNAs although these increases developed more slowly and were less intense than those of WTB6 fibroblasts. These data indicate that both GKO and GRKO mice fail to develop an IFN-gamma-mediated antiviral response, but differ in regulation of the inflammatory response to infection. Therefore, GKO and GRKO cannot be considered equivalent when assessing the role of IFN-gamma in CNS viral infections.
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Affiliation(s)
- Eun-Young Lee
- W. Harry Feinstone Department of Molecular Microbiology and Immunology, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland, United States of America
| | - Kimberly L. W. Schultz
- W. Harry Feinstone Department of Molecular Microbiology and Immunology, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland, United States of America
| | - Diane E. Griffin
- W. Harry Feinstone Department of Molecular Microbiology and Immunology, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland, United States of America
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22
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Krause CD, Izotova LS, Pestka S. Analytical use of multi-protein Fluorescence Resonance Energy Transfer to demonstrate membrane-facilitated interactions within cytokine receptor complexes. Cytokine 2013; 64:298-309. [PMID: 23769803 PMCID: PMC3770794 DOI: 10.1016/j.cyto.2013.05.008] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2012] [Revised: 05/17/2013] [Accepted: 05/18/2013] [Indexed: 12/17/2022]
Abstract
Experiments measuring Fluorescence Resonance Energy Transfer (FRET) between cytokine receptor chains and their associated proteins led to hypotheses describing their organization in intact cells. These interactions occur within a larger protein complex or within a given nano-environment. To illustrate this complexity empirically, we developed a protocol to analyze FRET among more than two fluorescent proteins (multi-FRET). In multi-FRET, we model FRET among more than two fluorophores as the sum of all possible pairwise interactions within the complex. We validated our assumption by demonstrating that FRET among pairs within a fluorescent triplet resembled FRET between each pair measured in the absence of the third fluorophore. FRET between two receptor chains increases with increasing FRET between the ligand-binding chain (e.g., IFN-γR1, IL-10R1 and IFN-λR1) and an acylated fluorescent protein that preferentially resides within subsections of the plasma membrane. The interaction of IL-10R2 with IFN-λR1 or IL-10R1 results in decreased FRET between IL-10R2 and the acylated fluorescent protein. Finally, we analyzed FRET among four fluorescent proteins to demonstrate that as FRET between IFN-γR1 and IFN-γR2 or between IFN-αR1 and IFN-αR2c increases, FRET among other pairs of proteins changes within each complex.
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Affiliation(s)
- Christopher D Krause
- Department of Biochemistry and Molecular Biology, Robert Wood Johnson Medical School - The University of Medicine and Dentistry of New Jersey, 675 Hoes Lane West, Piscataway, NJ 08855, USA.
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23
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Krause CD, Digioia G, Izotova LS, Pestka S. Improving the spectral analysis of Fluorescence Resonance Energy Transfer in live cells: application to interferon receptors and Janus kinases. Cytokine 2013; 64:272-85. [PMID: 23796694 PMCID: PMC3868223 DOI: 10.1016/j.cyto.2013.05.026] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2012] [Revised: 04/22/2013] [Accepted: 05/29/2013] [Indexed: 01/21/2023]
Abstract
The observed Fluorescence Resonance Energy Transfer (FRET) between fluorescently labeled proteins varies in cells. To understand how this variation affects our interpretation of how proteins interact in cells, we developed a protocol that mathematically separates donor-independent and donor-dependent excitations of acceptor, determines the electromagnetic interaction of donors and acceptors, and quantifies the efficiency of the interaction of donors and acceptors. By analyzing large populations of cells, we found that misbalanced or insufficient expression of acceptor or donor as well as their inefficient or reversible interaction influenced FRET efficiency in vivo. Use of red-shifted donors and acceptors gave spectra with less endogenous fluorescence but produced lower FRET efficiency, possibly caused by reduced quenching of red-shifted fluorophores in cells. Additionally, cryptic interactions between jellyfish FPs artefactually increased the apparent FRET efficiency. Our protocol can distinguish specific and nonspecific protein interactions even within highly constrained environments as plasma membranes. Overall, accurate FRET estimations in cells or within complex environments can be obtained by a combination of proper data analysis, study of sufficient numbers of cells, and use of properly empirically developed fluorescent proteins.
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Affiliation(s)
- Christopher D Krause
- Department of Biochemistry and Molecular Biology, Robert Wood Johnson Medical School, The University of Medicine and Dentistry of New Jersey, 675 Hoes Lane West, Piscataway, NJ 08855, USA.
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24
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Krause CD, Digioia G, Izotova LS, Xie J, Kim Y, Schwartz BJ, Mirochnitchenko OV, Pestka S. Ligand-independent interaction of the type I interferon receptor complex is necessary to observe its biological activity. Cytokine 2013; 64:286-97. [PMID: 23830819 PMCID: PMC3770802 DOI: 10.1016/j.cyto.2013.06.309] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2012] [Revised: 04/23/2013] [Accepted: 06/10/2013] [Indexed: 10/26/2022]
Abstract
Ectopic coexpression of the two chains of the Type I and Type III interferon (IFN) receptor complexes (IFN-αR1 and IFN-αR2c, or IFN-λR1 and IL-10R2) yielded sensitivity to IFN-alpha or IFN-lambda in only some cells. We found that IFN-αR1 and IFN-αR2c exhibit FRET only when expressed at equivalent and low levels. Expanded clonal cell lines expressing both IFN-αR1 and IFN-αR2c were sensitive to IFN-alpha only when IFN-αR1 and IFN-αR2c exhibited FRET in the absence of human IFN-alpha. Coexpression of RACK-1 or Jak1 enhanced the affinity of the interaction between IFN-αR1 and IFN-αR2c. Both IFN-αR1 and IFN-αR2c exhibited FRET with Jak1 and Tyk2. Together with data showing that disruption of the preassociation between the IFN-gamma receptor chains inhibited its biological activity, we propose that biologically active IFN receptors require ligand-independent juxtaposition of IFN receptor chains assisted by their associated cytosolic proteins.
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Affiliation(s)
- Christopher D. Krause
- Department of Biochemistry and Molecular Biology, Robert Wood Johnson Medical School - The University of Medicine and Dentistry of New Jersey, 675 Hoes Lane West, Piscataway, NJ 08855 USA
| | - Gina Digioia
- Department of Biochemistry and Molecular Biology, Robert Wood Johnson Medical School - The University of Medicine and Dentistry of New Jersey, 675 Hoes Lane West, Piscataway, NJ 08855 USA
- Pestka Biomedical Laboratories, 131 Ethel Road West, Suite 6, Piscataway, NJ 08854 USA
| | - Lara S. Izotova
- Department of Biochemistry and Molecular Biology, Robert Wood Johnson Medical School - The University of Medicine and Dentistry of New Jersey, 675 Hoes Lane West, Piscataway, NJ 08855 USA
| | - Junxia Xie
- Department of Biochemistry and Molecular Biology, Robert Wood Johnson Medical School - The University of Medicine and Dentistry of New Jersey, 675 Hoes Lane West, Piscataway, NJ 08855 USA
| | - Youngsun Kim
- Department of Biochemistry and Molecular Biology, Robert Wood Johnson Medical School - The University of Medicine and Dentistry of New Jersey, 675 Hoes Lane West, Piscataway, NJ 08855 USA
| | - Barbara J. Schwartz
- Department of Biochemistry and Molecular Biology, Robert Wood Johnson Medical School - The University of Medicine and Dentistry of New Jersey, 675 Hoes Lane West, Piscataway, NJ 08855 USA
| | - Olga V. Mirochnitchenko
- Department of Biochemistry and Molecular Biology, Robert Wood Johnson Medical School - The University of Medicine and Dentistry of New Jersey, 675 Hoes Lane West, Piscataway, NJ 08855 USA
| | - Sidney Pestka
- Department of Biochemistry and Molecular Biology, Robert Wood Johnson Medical School - The University of Medicine and Dentistry of New Jersey, 675 Hoes Lane West, Piscataway, NJ 08855 USA
- Pestka Biomedical Laboratories, 131 Ethel Road West, Suite 6, Piscataway, NJ 08854 USA
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Blouin CM, Lamaze C. Interferon gamma receptor: the beginning of the journey. Front Immunol 2013; 4:267. [PMID: 24027571 PMCID: PMC3760442 DOI: 10.3389/fimmu.2013.00267] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2013] [Accepted: 08/19/2013] [Indexed: 12/17/2022] Open
Abstract
Our view of endocytosis and membrane trafficking of transmembrane receptors has dramatically changed over the last 20 years. Several new endocytic routes have been discovered and mechanistically characterized in mammalian cells. Long considered as a passive means to terminate signaling through down-regulation of the number of activated receptors at the plasma membrane, it is now established that receptor endocytosis and endosomal sorting can be directly linked to the regulation of intracellular signaling pathways. The functional links between membrane trafficking of interferon receptors and JAK/STAT signaling have recently begun to be unraveled. These studies raise the exciting possibility that a certain level of signal specificity can be achieved through endocytosis and selective localization of the activated complexes within cellular membranes. The ongoing development of high-resolution cell imaging techniques with better spatial and temporal resolution gives new means of deciphering the inherent complexity of membrane trafficking and signaling. This should help to better comprehend the molecular mechanisms by which endocytosis and endosomal sorting of interferon receptors can orchestrate signaling selectivity within the JAK/STAT pathway that can be activated by as many as 60 different cytokines, growth factors, and hormones.
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Affiliation(s)
- Cédric M. Blouin
- Laboratoire Trafic, Signalisation et Ciblage Intracellulaires, Institut Curie – Centre de Recherche, Paris, France
- CNRS UMR144, Paris, France
| | - Christophe Lamaze
- Laboratoire Trafic, Signalisation et Ciblage Intracellulaires, Institut Curie – Centre de Recherche, Paris, France
- CNRS UMR144, Paris, France
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26
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Hamm P, Zewail AH, Fleming GR. A tribute to Robin Hochstrasser. Chem Phys 2013. [DOI: 10.1016/j.chemphys.2013.05.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Gambin A, Charzyńska A, Ellert-Miklaszewska A, Rybiński M. Computational models of the JAK1/2-STAT1 signaling. JAKSTAT 2013; 2:e24672. [PMID: 24069559 PMCID: PMC3772111 DOI: 10.4161/jkst.24672] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2013] [Revised: 04/10/2013] [Accepted: 04/11/2013] [Indexed: 12/13/2022] Open
Abstract
Despite a conceptually simple mechanism of signaling, the JAK-STAT pathway exhibits considerable behavioral complexity. Computational pathway models are tools to investigate in detail signaling process. They integrate well with experimental studies, helping to explain molecular dynamics and to state new hypotheses, most often about the structure of interactions. A relatively small amount of experimental data is available for a JAK1/2-STAT1 variant of the pathway, hence, only several computational models were developed. Here we review a dominant approach of kinetic modeling of the JAK1/2-STAT1 pathway, based on ordinary differential equations. We also give a brief overview of attempts to computationally infer topology of this pathway.
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Affiliation(s)
- Anna Gambin
- Institute of Informatics; University of Warsaw; Warsaw, Poland ; Mossakowski Medical Research Centre; Polish Academy of Sciences; Warsaw, Poland
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28
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Kilic SS, van Wengen A, de Paus RA, Celebi S, Meziane B, Hafizoglu D, van Dissel JT, van de Vosse E. Severe disseminated mycobacterial infection in a boy with a novel mutation leading to IFN-γR2 deficiency. J Infect 2012; 65:568-72. [PMID: 22902943 DOI: 10.1016/j.jinf.2012.08.008] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2012] [Revised: 08/06/2012] [Accepted: 08/09/2012] [Indexed: 11/25/2022]
Abstract
Mendelian susceptibility to mycobacterial diseases (MSMD) is a rare syndrome characterized by predisposition to severe, sometimes lethal, disease caused by otherwise poorly virulent mycobacteria. We report here a boy with a recurrent mycobacterial infection from the age of five months. Immunological analyses revealed an inability to respond to IFN-γ, subsequent genetic analyses revealed a novel homozygous mutation, r.679G > A in the IFNGR2 gene, resulting in a G227R substitution, that caused IFN-γR2 deficiency. This is only the 8th mutation in IFN-γR2 known so far. The boy eventually died of hepatic coma due to liver failure at the age of five.
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Affiliation(s)
- Sara Sebnem Kilic
- Pediatric Immunology Division, Department of Pediatrics, Uludag University Medical Faculty, Gorukle-Bursa 16059, Turkey
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29
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Piehler J, Thomas C, Garcia KC, Schreiber G. Structural and dynamic determinants of type I interferon receptor assembly and their functional interpretation. Immunol Rev 2012; 250:317-34. [PMID: 23046138 PMCID: PMC3986811 DOI: 10.1111/imr.12001] [Citation(s) in RCA: 173] [Impact Index Per Article: 14.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Type I interferons (IFNs) form a network of homologous cytokines that bind to a shared, heterodimeric cell surface receptor and engage signaling pathways that activate innate and adaptive immune responses. The ability of IFNs to mediate differential responses through the same cell surface receptor has been subject of a controversial debate and has important medical implications. During the past decade, a comprehensive insight into the structure, energetics, and dynamics of IFN recognition by its two-receptor subunits, as well as detailed correlations with their functional properties on the level of signal activation, gene expression, and biological responses were obtained. All type I IFNs bind the two-receptor subunits at the same sites and form structurally very similar ternary complexes. Differential IFN activities were found to be determined by different lifetimes and ligand affinities toward the receptor subunits, which dictate assembly and dynamics of the signaling complex in the plasma membrane. We present a simple model, which explains differential IFN activities based on rapid endocytosis of signaling complexes and negative feedback mechanisms interfering with ternary complex assembly. More insight into signaling pathways as well as endosomal signaling and trafficking will be required for a comprehensive understanding, which will eventually lead to therapeutic applications of IFNs with increased efficacy.
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Affiliation(s)
- Jacob Piehler
- Department of Biology, University of Osnabrück, Osnabrück, Germany
| | - Christoph Thomas
- Departments of Molecular and Cellular Physiology, and Structural Biology, Howard Hughes Medical Institute, Stanford University School of Medicine, Stanford, CA, USA
| | - K. Christopher Garcia
- Departments of Molecular and Cellular Physiology, and Structural Biology, Howard Hughes Medical Institute, Stanford University School of Medicine, Stanford, CA, USA
| | - Gideon Schreiber
- Department of Biological Chemistry, Weizmann Institute of Science, Rehovot, Israel
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Rybiński M, Gambin A. Model-based selection of the robust JAK-STAT activation mechanism. J Theor Biol 2012; 309:34-46. [PMID: 22677400 DOI: 10.1016/j.jtbi.2012.04.031] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2011] [Revised: 04/20/2012] [Accepted: 04/24/2012] [Indexed: 11/15/2022]
Abstract
JAK-STAT pathway family is a principal signaling mechanism in eukaryotic cells. Evolutionary conserved roles of this mechanism include control over fundamental processes such as cell growth or apoptosis. Deregulation of the JAK-STAT signaling is frequently associated with cancerogenesis. JAK-STAT pathways become hyper-activated in many human tumors. Therefore, components of these pathways are an attractive target for drugs, which design requires as adequate models as possible. Although, in principle, JAK-STAT signaling is relatively simple, the ambiguities in a receptor activation prevent a clear explanation of the underlying molecular mechanism. Here, we compare four variants of a computational model of the JAK1/2-STAT1 signaling pathway. These variants capture known, basic discrepancies in the mechanism of activation of a cytokine receptor, in the context of all key components of the pathway. We carry out a comparative analysis using mass action kinetics. The investigated differences are so marginal that all models satisfy a goodness of fit criteria to the extent that the state of the art Bayesian model selection (BMS) method fails to significantly promote one model. Therefore, we comparatively investigate changes in a robustness of the JAK1/2-STAT1 pathway variants using the global sensitivity analysis method (GSA), complemented with the identifiability analysis (IA). Both BMS and GSA are used to analyze the models for the varying parameter values. We found out that, both BMS and GSA, narrowed down to the receptor activation component, slightly promote the least complex model. Further, insightful, comprehensive GSA, motivated by the concept of robustness, allowed us to show that the precise order of reactions of a ligand binding and a receptor dimerization is not as important as the on-membrane pre-assembly of the dimers in the absence of ligand. The main value of this work is an evaluation of the usefulness of different model selection methods in a frequently encountered, but not much discussed case of a model of a considerable size, which has several variants differing at peripheries. In such situation, all considered variants can reach nearly perfect agreement with respect to their numerical simulations results and, most often, the sufficient experimental data to test against is not available. We argue that in such an adverse setting, the GSA and IA, although not directly corresponding to the model selection problem, can be more informative than the representative, generalizability-based approaches to this task. An additional insight into how the responsibility for the network dynamics spreads among model parameters, enables more conscious, expert-mediated choice of the preferred model.
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Affiliation(s)
- Mikołaj Rybiński
- Institute of Informatics, University of Warsaw, ul. Banacha 2, Warsaw, Poland.
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Abstract
The interferons (IFNs) were originally described over 50 years ago, identified by their ability to confer viral resistance to cells. We now know that they are much more than just anti‐viral cytokines collectively having roles in both innate and adaptive immune responses, in tumor surveillance and defense, and modulation of immune cell function. Three types of IFN have now been described, simply referred to as type I, II and III. Distinguishable by the unique receptors that they rely on for signal transduction, the three types of IFN have specific and varied roles in the maintenance of human health and defense against pathogens. In mounting an IFN‐mediated immune response, the human body has developed the ability to regulate IFN‐mediated signal transduction. Like all cytokines, the ability of a cell to respond to IFN is completely dependent on the presence of its cognate receptor on the surface of the target cell. Thus, one of the major mechanisms used by the human body to regulate the strength and duration of the IFN response is through regulation of receptor levels, thereby altering the cytokine‐specific responsiveness of the target cell. This review will discuss the receptor system utilized by the type I IFNs and compare it with that of the type II and III IFNs, which also regulate immune responses through controlling receptor level on the cell surface. The innate immune response recognises pathogens and sterile danger signals to generate effector cytokines, such as type I interferons (IFNs), with a high degree of sophistication. The May/June 2012 issue provides a series of reviews of the role of type I IFNs in regulating immune responses. Topics to be covered include the reason for the induction of IFNs, type I IFNs interactions with and regulation of target cells (e.g. T cells, B cells and Th10 cells) in the immune system, and the roles and mechanisms of IFNs in specific organs or diseases. The accompanying web focus presents links to related articles from across Nature Publishing Group to provide more background information about these proteins.
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Affiliation(s)
- Nicole A de Weerd
- Centre for Innate Immunity and Infectious Diseases, Monash Institute of Medical Research, Monash University, Clayton, Victoria, Australia.
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32
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Han F, Liang P, Wang F, Zeng L, Zhang B. Automated analysis of time-lapse imaging of nuclear translocation by retrospective strategy and its application to STAT1 in HeLa cells. PLoS One 2011; 6:e27454. [PMID: 22125613 PMCID: PMC3220678 DOI: 10.1371/journal.pone.0027454] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2011] [Accepted: 10/17/2011] [Indexed: 11/19/2022] Open
Abstract
Cell-based image analysis of time-lapse imaging is mainly challenged by faint fluorescence and dim boundaries of cellular structures of interest. To resolve these bottlenecks, a novel method was developed based on “retrospective” analysis for cells undergoing minor morphological changes during time-lapse imaging. We fixed and stained the cells with a nuclear dye at the end of the experiment, and processed the time-lapse images using the binary masks obtained by segmenting the nuclear-stained image. This automated method also identifies cells that move during the time-lapse imaging, which is a factor that could influence the kinetics measured for target proteins that are present mostly in the cytoplasm. We then validated the method by measuring interferon gamma (IFNγ) induced signal transducers and activators of transcription 1 (STAT1) nuclear translocation in living HeLa cells. For the first time, automated large-scale analysis of nuclear translocation in living cells was achieved by our novel method. The responses of the cells to IFNγ exhibited a significant drift across the population, but common features of the responses led us to propose a three-stage model of STAT1 import. The simplicity and automation of this method should enable its application in a broad spectrum of time-lapse studies of nuclear-cytoplasmic translocation.
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Affiliation(s)
- Fujun Han
- Laboratory for RNA Chemical Biology, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou, People's Republic of China
- Department of Otorhinolaryngology, People's Liberation Army No. 458 Hospital, Guangzhou, China
- School of Biochemistry, Medical Sciences, University Walk, Bristol, United Kingdom
- * E-mail: (FH); (BZ)
| | - Peizhou Liang
- Laboratory for RNA Chemical Biology, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou, People's Republic of China
| | - Feifei Wang
- Laboratory for RNA Chemical Biology, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou, People's Republic of China
| | - Lingyun Zeng
- Department of Neuroendocrine, People's Liberation Army No. 458 Hospital, Guangzhou, China
| | - Biliang Zhang
- Laboratory for RNA Chemical Biology, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou, People's Republic of China
- State Key Laboratory of Respiratory Diseases, Guangzhou Institute of Respiratory Diseases, Guangzhou, China
- * E-mail: (FH); (BZ)
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Qu HQ, Fisher-Hoch SP, McCormick JB. Molecular immunity to mycobacteria: knowledge from the mutation and phenotype spectrum analysis of Mendelian susceptibility to mycobacterial diseases. Int J Infect Dis 2011; 15:e305-13. [PMID: 21330176 PMCID: PMC3078969 DOI: 10.1016/j.ijid.2011.01.004] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2010] [Revised: 01/04/2011] [Accepted: 01/10/2011] [Indexed: 01/08/2023] Open
Abstract
Understanding molecular immunity against mycobacterial infection is critical for the development of effective strategies to control tuberculosis (TB), which is a major health issue in the developing world. Host immunogenetic studies represent an indispensable approach to understand the molecular mechanisms against mycobacterial infection. A superb paradigm is the identification of rare mutations causing Mendelian susceptibility to mycobacterial diseases (MSMD). Mutations in the interferon-gamma (IFN-γ) receptor genes are highly specific (although not exclusive) for mycobacterial infection. Only dominant negative mutations of STAT1 have specific susceptibility to mycobacterial infection. Mutations in the interleukin-12 (IL-12) signaling genes have phenotypes with non-specificity. Current studies highlight a complex molecular network in antimycobacterial immunity, centered on IFN-γ signaling.
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Affiliation(s)
- Hui-Qi Qu
- University of Texas Health Science Center at Houston, School of Public Health, Brownsville Campus, 80 Fort Brown, SPH Bldg, Brownsville, Texas 78520, USA.
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de Paus RA, Kilic SS, van Dissel JT, van de Vosse E. Effect of amino acid substitutions in the human IFN-γR2 on IFN-γ responsiveness. Genes Immun 2011; 12:136-44. [PMID: 21248774 DOI: 10.1038/gene.2010.74] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2010] [Revised: 11/17/2010] [Accepted: 11/17/2010] [Indexed: 11/09/2022]
Abstract
Patients with interferon-γ receptor (IFN-γR) null mutations have severe infections with poorly pathogenic Mycobacteria. The IFN-γR complex involves two IFN-γR1 and two IFN-γR2 chains, in which several amino acid substitutions, some linked to disease and some apparently naturally occurring, have been described. We developed a model system to study functional effects of genetic variations in IFN-γR2. We retrovirally transduced wild-type IFN-γR2 and IFN-γR2 carrying presently known amino acid substitutions in various human cell lines, and next determined the IFN-γR2 expression pattern as well as IFN-γ responsiveness. We determined that the T58R, Q64R, E147K and K182E variants of IFN-γR2 are fully functional, although the Q64R variant may be expressed higher on the cell membrane. The R114C, T168N and G227R variants were identified in patients that had disseminated infections with non-tuberculous Mycobacteria. Of these genetic variants, T168N was confirmed to be completely non-functional, whereas the novel variant G227R, and the previously reported R114C, were partial functional. The impaired IFN-γ responsiveness of R114C and G227R is mainly due to reduced receptor function, although expression on the cell membrane is reduced as well. We conclude that the T58R, Q64R, E147K and K182E variants are polymorphisms, whereas the R114C, T168N and G227R constitute mutations associated with disease.
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Affiliation(s)
- R A de Paus
- Department of Infectious Diseases, Leiden University Medical Center, Leiden, The Netherlands
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Chaperone Hsp27 modulates AUF1 proteolysis and AU-rich element-mediated mRNA degradation. Mol Cell Biol 2011; 31:1419-31. [PMID: 21245386 DOI: 10.1128/mcb.00907-10] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023] Open
Abstract
AUF1 is an AU-rich element (ARE)-binding protein that recruits translation initiation factors, molecular chaperones, and mRNA degradation enzymes to the ARE for mRNA destruction. We recently found chaperone Hsp27 to be an AUF1-associated ARE-binding protein required for tumor necrosis factor alpha (TNF-α) mRNA degradation in monocytes. Hsp27 is a multifunctional protein that participates in ubiquitination of proteins for their degradation by proteasomes. A variety of extracellular stimuli promote Hsp27 phosphorylation on three serine residues--Ser(15), Ser(78), and Ser(82)-by a number of kinases, including the mitogen-activated protein (MAP) pathway kinases p38 and MK2. Activating either kinase stabilizes ARE mRNAs. Likewise, ectopic expression of phosphomimetic mutant forms of Hsp27 stabilizes reporter ARE mRNAs. Here, we continued to examine the contributions of Hsp27 to mRNA degradation. As AUF1 is ubiquitinated and degraded by proteasomes, we addressed the hypothesis that Hsp27 phosphorylation controls AUF1 levels to modulate ARE mRNA degradation. Indeed, selected phosphomimetic mutants of Hsp27 promote proteolysis of AUF1 in a proteasome-dependent fashion and render ARE mRNAs more stable. Our results suggest that the p38 MAP kinase (MAPK)-MK2-Hsp27 signaling axis may target AUF1 destruction by proteasomes, thereby promoting ARE mRNA stabilization.
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Schreiber G, Walter MR. Cytokine-receptor interactions as drug targets. Curr Opin Chem Biol 2010; 14:511-9. [PMID: 20619718 DOI: 10.1016/j.cbpa.2010.06.165] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2010] [Revised: 05/30/2010] [Accepted: 06/08/2010] [Indexed: 12/24/2022]
Abstract
Cytokines are essential proteins that exert potent control over entire cell populations to fight infections and other pathologies, but can by themselves cause disease. Therefore, cytokine-related drugs act either by stimulating or blocking their activities. Our knowledge of the structures of cytokine-receptor complexes, the biophysical basis of their binding, and their mode of biological activation has substantially increased in recent years. This knowledge has been translated into new drugs and drug candidates. This review summarizes our current understanding of the receptor-mediated activity of cytokines, their relation to health and disease, and the agents in use to activate and block their actions.
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Affiliation(s)
- Gideon Schreiber
- Department of Biological Chemistry, Weizmann Institute of Science, Rehovot 76100, Israel.
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McGillicuddy FC, Chiquoine EH, Hinkle CC, Kim RJ, Shah R, Roche HM, Smyth EM, Reilly MP. Interferon gamma attenuates insulin signaling, lipid storage, and differentiation in human adipocytes via activation of the JAK/STAT pathway. J Biol Chem 2009; 284:31936-44. [PMID: 19776010 DOI: 10.1074/jbc.m109.061655] [Citation(s) in RCA: 189] [Impact Index Per Article: 12.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Recent reports demonstrate T-cell infiltration of adipose tissue in early obesity. We hypothesized that interferon (IFN) gamma, a major T-cell inflammatory cytokine, would attenuate human adipocyte functions and sought to establish signaling mechanisms. Differentiated human adipocytes were treated with IFNgamma +/- pharmacological inhibitors prior to insulin stimulation. [(3)H]Glucose uptake and AKT phosphorylation were assessed as markers of insulin sensitivity. IFNgamma induced sustained loss of insulin-stimulated glucose uptake in human adipocytes, coincident with reduced Akt phosphorylation and down-regulation of the insulin receptor, insulin receptor substrate-1, and GLUT4. Loss of adipocyte triglyceride storage was observed with IFNgamma co-incident with reduced expression of peroxisome proliferator-activated receptor gamma, adiponectin, perilipin, fatty acid synthase, and lipoprotein lipase. Treatment with IFNgamma also blocked differentiation of pre-adipocytes to the mature phenotype. IFNgamma-induced robust STAT1 phosphorylation and SOCS1 mRNA expression, with modest, transient STAT3 phosphorylation and SOCS3 induction. Preincubation with a non-selective JAK inhibitor restored glucose uptake and Akt phosphorylation while completely reversing IFNgamma suppression of adipogenic mRNAs and adipocyte differentiation. Specific inhibition of JAK2 or JAK3 failed to block IFNgamma effects suggesting a predominant role for JAK1-STAT1. We demonstrate that IFNgamma attenuates insulin sensitivity and suppresses differentiation in human adipocytes, an effect most likely mediated via sustained JAK-STAT1 pathway activation.
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Affiliation(s)
- Fiona C McGillicuddy
- Cardiovascular Institute, University of Pennsylvania School of Medicine, Philadelphia, Pennsylvania 19104, USA
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Deng C, Shao Z, Xiong X, Liu Z, Zhang Z. The expression of TRAIL and its receptors in osteosarcoma cells and the apoptosis effect of a combination of TRAIL, adriamycin and IFN-γ on MG-63 cells. ACTA ACUST UNITED AC 2009. [DOI: 10.1016/s1007-4376(09)60065-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Lai HS, Lin WH, Hsu WM, Chen CN, Chang KJ, Lee PH. Variations in Interferon Gamma Receptor Gene Expression during Liver Regeneration after Partial Hepatectomy in Rats. Am Surg 2009. [DOI: 10.1177/000313480907500111] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Cell-mediated immunity, which includes interferon gamma (IFN-γ) expression, is activated during the process of liver regeneration; however, the genetic pathway of this activation is still unclear. The present study evaluated variations in the interferon gamma receptor (IFN-γR) gene and its mRNA expression during liver regeneration after partial hepatectomy (PH). Male Wistar rats weighing approximately 200 g were subjected to PH (70 or 40%). IFN-γR gene expression in the remnant liver was measured by cDNA microarray, and mRNA expression was verified by real-time quantitative reverse transcription-polymerase chain reaction (Q-PCR) preoperatively and at 2, 4, 6,12, 24, and 72 hours and 7 days postoperatively. The ratio of remnant liver weight to body weight increased markedly after 70 per cent PH and more gradually after 40 per cent PH. It reached near 90 per cent of the preoperative level at 72 hours after PH in both groups. The scanned spots of the genomic survey on the cDNA microarray chips were uneven and increased irregularly in number and density after PH. IFN-γR gene expression increased markedly in a single peak pattern, up to more than double the preoperative level, at 6 hours after 70 per cent PH. The curve in the 40 per cent PH group was flat and peaked at only 1.6 times the preoperative level. The variations in IFN-γR-related mRNA expression were verified by Q-PCR. Elevations in IFN-γR gene and mRNA expression were shown during the early stage of liver regeneration after PH. The genetic pathway of IFN-γ/IFN-γR expression is activated during liver regeneration.
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Affiliation(s)
- Hong-Shiee Lai
- From the Department of Surgery, National Taiwan University Hospital and National Taiwan University College of Medicine, Taipei, Taiwan
| | - Wen-Hsi Lin
- From the Department of Surgery, National Taiwan University Hospital and National Taiwan University College of Medicine, Taipei, Taiwan
| | - Wen-Ming Hsu
- From the Department of Surgery, National Taiwan University Hospital and National Taiwan University College of Medicine, Taipei, Taiwan
| | - Chiung-Nien Chen
- From the Department of Surgery, National Taiwan University Hospital and National Taiwan University College of Medicine, Taipei, Taiwan
| | - King-Jen Chang
- From the Department of Surgery, National Taiwan University Hospital and National Taiwan University College of Medicine, Taipei, Taiwan
| | - Po-Huang Lee
- From the Department of Surgery, National Taiwan University Hospital and National Taiwan University College of Medicine, Taipei, Taiwan
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Fouser LA, Wright JF, Dunussi-Joannopoulos K, Collins M. Th17 cytokines and their emerging roles in inflammation and autoimmunity. Immunol Rev 2008; 226:87-102. [PMID: 19161418 DOI: 10.1111/j.1600-065x.2008.00712.x] [Citation(s) in RCA: 184] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
T-helper 17 (Th17) cells are a new lineage of CD4(+) T cells that are characterized by their production of interleukin-17A (IL-17A). Recent studies show that these cells can also express IL-17F, IL-22, and IL-21. IL-17A and IL-17F can form a heterodimeric cytokine, which mediates biological activities, at least in part, through shared receptors with IL-17A and IL-17F homodimers. The cytokines made by Th17 cells represent three distinct gene families, highlighting the unique biology of these cells. Accumulating data support a role for Th17 cells and these cytokines in inflammatory processes and in animal models of autoimmunity or inflammation. Emerging data in clinical trials support our understanding of the importance of Th17 cells in inflammatory disease. Future clinical studies will allow us to evaluate the role of each cytokine independently in contributing to human diseases with immune-mediated pathologies and to design optimal cytokine-targeted therapies for these diseases.
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Han F, Luo Y, Ge N, Xu J. Construction of fluorescence resonance energy transfer vectors and their application in study of structure and function of signal transducers and activators of transcription 1. Acta Biochim Biophys Sin (Shanghai) 2008; 40:934-42. [PMID: 18989574 DOI: 10.1111/j.1745-7270.2008.00480.x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
Abstract
Protein-protein interactions have been studied extensively by green fluorescent protein-based fluorescence resonance energy transfer (FRET). The fluorescent proteins (FP) can be fused either to the N- or C-terminus of a host protein, but it is difficult to predict which order will perturb the host protein the least and provide the largest FRET. Therefore, a researcher needs to fuse host proteins with FP at both the N- and C-termini and test every possible combination (N-N, N-C, or C-C) to promote the energy transfer efficiency. Consequently, researchers required to do many subclonings. Herein, we designed FRET vectors to make them more efficient. The expression vectors of pCFP-YFP and pYFP-CFP were constructed with both cyan fluorescent protein (CFP)-yellow fluorescent protein (YFP) and YFP-CFP coding sequences flanked by two restriction enzyme sites, and with multiple cloning regions in the middle of both coding sequences. To select an optimal combination for FRET detection, we created plasmids encoding various fusion proteins of FP and signal transducers and activators of transcription 1 (STAT1) . We found that the nuclear:cytoplasmic fluorescence intensity ratios of STAT1-FP were significantly higher than those of FP-STAT1 at steady state, and fluorescence redistribution was only observed for STAT1-FP upon interferon gamma (IFNgamma) stimulation. In addition, positive FRET signals were only detected in the C-C interactions of STAT1 homodimer. Taken together, these data indicate that fusing STAT1 at the N-terminus with FP impairs the interactions of unphosphorylated STAT1 homodimers and possibly diminishes its binding with DNA. In contrast, STAT1-FP was functional with respect to its activation. Moreover, the FRET vectors are able to facilitate FRET studies.
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Affiliation(s)
- Fujun Han
- Guangzhou Medical College, Guangzhou Institute of Respiratory Diseases, Guangzhou 510120, China
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Leaphart CL, Dai S, Gribar SC, Richardson W, Ozolek J, Shi XH, Bruns JR, Branca M, Li J, Weisz OA, Sodhi C, Hackam DJ. Interferon-gamma inhibits enterocyte migration by reversibly displacing connexin43 from lipid rafts. Am J Physiol Gastrointest Liver Physiol 2008; 295:G559-69. [PMID: 18635599 PMCID: PMC2536784 DOI: 10.1152/ajpgi.90320.2008] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
Necrotizing enterocolitis (NEC) is associated with the release of interferon-gamma (IFN) by enterocytes and delayed intestinal restitution. Our laboratory has recently demonstrated that IFN inhibits enterocyte migration by impairing enterocyte gap junctions, intercellular channels that are composed of connexin43 (Cx43) monomers and that are required for enterocyte migration to occur. The mechanisms by which IFN inhibits gap junctions are incompletely understood. Lipid rafts are cholesterol-sphingolipid-rich microdomains of the plasma membrane that play a central role in the trafficking and signaling of various proteins. We now hypothesize that Cx43 is present on enterocyte lipid rafts and that IFN inhibits enterocyte migration by displacing Cx43 from lipid rafts in enterocytes. We now confirm our previous observations that intestinal restitution is impaired in NEC and demonstrate that Cx43 is present on lipid rafts in IEC-6 enterocytes. We show that lipid rafts are required for enterocyte migration, that IFN displaces Cx43 from lipid rafts, and that the phorbol ester phorbol 12-myristate 13-acetate (PMA) restores Cx43 to lipid rafts after treatment with IFN in a protein kinase C-dependent manner. IFN also reversibly decreased the phosphorylation of Cx43 on lipid rafts, which was restored by PMA. Strikingly, restoration of Cx43 to lipid rafts by PMA or by transfection of enterocytes with adenoviruses expressing wild-type Cx43 but not mutant Cx43 is associated with the restoration of enterocyte migration after IFN treatment. Taken together, these findings suggest an important role for lipid raft-Cx43 interactions in the regulation of enterocyte migration during exposure to IFN, such as NEC.
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Affiliation(s)
- Cynthia L. Leaphart
- Division of Pediatric Surgery, Children's Hospital of Pittsburgh and Department of Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania
| | - Shipan Dai
- Division of Pediatric Surgery, Children's Hospital of Pittsburgh and Department of Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania
| | - Steven C. Gribar
- Division of Pediatric Surgery, Children's Hospital of Pittsburgh and Department of Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania
| | - Ward Richardson
- Division of Pediatric Surgery, Children's Hospital of Pittsburgh and Department of Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania
| | - John Ozolek
- Division of Pediatric Surgery, Children's Hospital of Pittsburgh and Department of Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania
| | - Xia-hua Shi
- Division of Pediatric Surgery, Children's Hospital of Pittsburgh and Department of Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania
| | - Jennifer R. Bruns
- Division of Pediatric Surgery, Children's Hospital of Pittsburgh and Department of Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania
| | - Maria Branca
- Division of Pediatric Surgery, Children's Hospital of Pittsburgh and Department of Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania
| | - Jun Li
- Division of Pediatric Surgery, Children's Hospital of Pittsburgh and Department of Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania
| | - Ora A. Weisz
- Division of Pediatric Surgery, Children's Hospital of Pittsburgh and Department of Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania
| | - Chhinder Sodhi
- Division of Pediatric Surgery, Children's Hospital of Pittsburgh and Department of Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania
| | - David J. Hackam
- Division of Pediatric Surgery, Children's Hospital of Pittsburgh and Department of Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania
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Abstract
Numerous important drugs target cytokines and growth factors or their receptors. Our understanding of the molecular mechanisms governing receptor activation and signaling has lagged in key areas, however, limiting drug discovery efforts to relatively few basic strategies. Recently, substantial progress has been made on several aspects of this problem. These include improved methods for establishing the mechanism of receptor activation, a clearer understanding of the biochemical basis for differential signaling by ligands that act through a common receptor, new methods for measuring the affinities of steps in receptor activation on live cells, and progress toward a systems level understanding of receptor signaling. These advances are providing a new understanding of the function of these receptors that presents opportunities for the development of improved drugs.
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Strunk JJ, Gregor I, Becker Y, Li Z, Gavutis M, Jaks E, Lamken P, Walz T, Enderlein J, Piehler J. Ligand binding induces a conformational change in ifnar1 that is propagated to its membrane-proximal domain. J Mol Biol 2008; 377:725-39. [PMID: 18294654 DOI: 10.1016/j.jmb.2008.01.017] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2007] [Revised: 12/20/2007] [Accepted: 01/07/2008] [Indexed: 10/22/2022]
Abstract
The type I interferon (IFN) receptor plays a key role in innate immunity against viral and bacterial infections. Here, we show by intramolecular Förster resonance energy transfer spectroscopy that ligand binding induces substantial conformational changes in the ectodomain of ifnar1 (ifnar1-EC). Binding of IFN alpha 2 and IFN beta induce very similar conformations of ifnar1, which were confirmed by single-particle electron microscopy analysis of the ternary complexes formed by IFN alpha 2 or IFN beta with the two receptor subunits ifnar1-EC and ifnar2-EC. Photo-induced electron-transfer-based fluorescence quenching and single-molecule fluorescence lifetime measurements revealed that the ligand-induced conformational change in the membrane-distal domains of ifnar1-EC is propagated to its membrane-proximal domain, which is not involved in ligand recognition but is essential for signal activation. Temperature-dependent ligand binding studies as well as stopped-flow fluorescence experiments corroborated a multistep conformational change in ifnar1 upon ligand binding. Our results thus suggest that the relatively intricate architecture of the type I IFN receptor complex is designed to propagate the ligand binding event to and possibly even across the membrane by conformational changes.
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Affiliation(s)
- Jennifer Julia Strunk
- Institute of Biochemistry, Johann Wolfgang Goethe-University, Biocenter N210, Max-von-Laue-Strasse 9, 60438 Frankfurt am Main, Germany
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Abstract
Interferons (IFNs) were discovered 50 years ago independently by Isaacs and Lindemann and by Nagata and Kojima. When it was later realized that IFNs are active at very low concentrations, research began to determine how their powerful effects were generated from such a small initial signal. It has since been established that interferons, as well as all other cytokines, employ cell surface receptors to translate their presence in the serum to a potent cellular response to a viral infection. These receptor complexes are composed of multiple distinct glycosylated transmembrane polypeptides, a number of protein tyrosine kinases, and interact transiently with a large variety of other proteins including transcription factors, phosphatases, signaling repressors, and adaptor proteins coupling the receptor to alternative signaling pathways. Three major receptor complexes exist that are exclusive to each of three major classes of interferon. Even though the effects of each major class of interferon vary physiologically, each receptor complex interacts with its ligand in similar ways and activates similar signaling cascades. In this mini-review, we take a historical perspective at the major events in the characterization of interferon receptors, discussing interesting results that still need to be explained.
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Affiliation(s)
- Christopher D Krause
- Department of Molecular Genetics, Microbiology, and Immunology, Robert Wood Johnson Medical School - The University of Medicine and Dentistry of New Jersey, Piscataway, NJ 08854, USA
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Krause CD, He W, Kotenko S, Pestka S. Modulation of the activation of Stat1 by the interferon-gamma receptor complex. Cell Res 2006; 16:113-23. [PMID: 16467883 DOI: 10.1038/sj.cr.7310015] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
The activation of Stat1 by the interferon-gamma (IFN-gamma) receptor complex is responsible for the transcription of a significant portion of IFN-gamma induced genes. Many of these genes are responsible for the induction of an apoptotic state in response to IFN-gamma. In the absence of Stat1 activation, IFN-gamma instead induces a proliferative response. Modifying Stat1 activation by IFN-gamma may have pharmacological benefits. We report that the rate of activation of Stat1 can be altered in HeLa cells by overexpressing either the IFN-gammaR1 chain or the IFN-gammaR2 chain. These alterations occur in hematopoietic cell lines: Raji cells and monocytic cell lines, which have average and above-average IFN-gammaR2 surface expression, activate Stat1 similarly to HeLa cells and HeLa cells overexpressing IFNgammaR2, respectively. The rapid Stat1 activation seen in HeLa cells can be inhibited by overexpressing a chimeric IFN-gammaR2 chain that does not bind Jak2 or (when high concentrations of IFN-gamma are used) by overexpressing IFN-gammaR1. These data are consistent with a model in which the recruitment of additional Jak2 activity to a signaling complex accelerates the rate of Stat1 activation. We conclude that the rate of activation of Stat1 in cells by IFN-gamma can be modified by regulating either receptor chain and speculate that pharmacological agents which modify receptor chain expression may alter IFN-gamma receptor signal transduction.
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Affiliation(s)
- Christopher D Krause
- Department of Molecular Genetics, Microbiology and Immunology, Robert Wood Johnson Medical School, The University of Medicine and Dentistry of New Jersey, 675 Hoes Lane West, Piscataway, 08855, USA
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