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Bredow C, Thery F, Wirth EK, Ochs S, Kespohl M, Kleinau G, Kelm N, Gimber N, Schmoranzer J, Voss M, Klingel K, Spranger J, Renko K, Ralser M, Mülleder M, Heuser A, Knobeloch KP, Scheerer P, Kirwan J, Brüning U, Berndt N, Impens F, Beling A. ISG15 blocks cardiac glycolysis and ensures sufficient mitochondrial energy production during Coxsackievirus B3 infection. Cardiovasc Res 2024; 120:644-657. [PMID: 38309955 PMCID: PMC11074791 DOI: 10.1093/cvr/cvae026] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/20/2023] [Revised: 11/10/2023] [Accepted: 12/12/2023] [Indexed: 02/05/2024] Open
Abstract
AIMS Virus infection triggers inflammation and, may impose nutrient shortage to the heart. Supported by type I interferon (IFN) signalling, cardiomyocytes counteract infection by various effector processes, with the IFN-stimulated gene of 15 kDa (ISG15) system being intensively regulated and protein modification with ISG15 protecting mice Coxsackievirus B3 (CVB3) infection. The underlying molecular aspects how the ISG15 system affects the functional properties of respective protein substrates in the heart are unknown. METHODS AND RESULTS Based on the protective properties due to protein ISGylation, we set out a study investigating CVB3-infected mice in depth and found cardiac atrophy with lower cardiac output in ISG15-/- mice. By mass spectrometry, we identified the protein targets of the ISG15 conjugation machinery in heart tissue and explored how ISGylation affects their function. The cardiac ISGylome showed a strong enrichment of ISGylation substrates within glycolytic metabolic processes. Two control enzymes of the glycolytic pathway, hexokinase 2 (HK2) and phosphofructokinase muscle form (PFK1), were identified as bona fide ISGylation targets during infection. In an integrative approach complemented with enzymatic functional testing and structural modelling, we demonstrate that protein ISGylation obstructs the activity of HK2 and PFK1. Seahorse-based investigation of glycolysis in cardiomyocytes revealed that, by conjugating proteins, the ISG15 system prevents the infection-/IFN-induced up-regulation of glycolysis. We complemented our analysis with proteomics-based advanced computational modelling of cardiac energy metabolism. Our calculations revealed an ISG15-dependent preservation of the metabolic capacity in cardiac tissue during CVB3 infection. Functional profiling of mitochondrial respiration in cardiomyocytes and mouse heart tissue by Seahorse technology showed an enhanced oxidative activity in cells with a competent ISG15 system. CONCLUSION Our study demonstrates that ISG15 controls critical nodes in cardiac metabolism. ISG15 reduces the glucose demand, supports higher ATP production capacity in the heart, despite nutrient shortage in infection, and counteracts cardiac atrophy and dysfunction.
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MESH Headings
- Animals
- Humans
- Male
- Coxsackievirus Infections/metabolism
- Coxsackievirus Infections/virology
- Coxsackievirus Infections/genetics
- Cytokines/genetics
- Cytokines/metabolism
- Disease Models, Animal
- Energy Metabolism
- Enterovirus B, Human/pathogenicity
- Enterovirus B, Human/metabolism
- Glycolysis
- Host-Pathogen Interactions
- Mice, Inbred C57BL
- Mice, Knockout
- Mitochondria, Heart/metabolism
- Mitochondria, Heart/pathology
- Myocytes, Cardiac/metabolism
- Myocytes, Cardiac/virology
- Myocytes, Cardiac/pathology
- Protein Processing, Post-Translational
- Signal Transduction
- Ubiquitins/metabolism
- Ubiquitins/genetics
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Affiliation(s)
- Clara Bredow
- Charité - Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Institute of Biochemistry, Charitéplatz 1, 10117 Berlin, Germany
| | - Fabien Thery
- Department of Biomolecular Medicine, Ghent University, Ghent, Belgium
- VIB-UGent Center for Medical Biotechnology, Ghent, Belgium
| | - Eva Katrin Wirth
- Deutsches Zentrum für Herz-Kreislauf-Forschung, partner site Berlin, Berlin, Germany
- Charité - Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Department of Endocrinology, Diabetes and Nutrition, Berlin, Germany
| | - Sarah Ochs
- Charité - Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Institute of Biochemistry, Charitéplatz 1, 10117 Berlin, Germany
| | - Meike Kespohl
- Charité - Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Institute of Biochemistry, Charitéplatz 1, 10117 Berlin, Germany
- Deutsches Zentrum für Herz-Kreislauf-Forschung, partner site Berlin, Berlin, Germany
| | - Gunnar Kleinau
- Charité - Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Institute of Medical Physics and Biophysics, Group Protein X-ray Crystallography and Signal Transduction, Charitéplatz 1, Berlin, Germany
| | - Nicolas Kelm
- Charité - Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Institute of Biochemistry, Charitéplatz 1, 10117 Berlin, Germany
| | - Niclas Gimber
- Charité - Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Advanced Medical Bioimaging Core Facility, Berlin, Germany
| | - Jan Schmoranzer
- Charité - Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Advanced Medical Bioimaging Core Facility, Berlin, Germany
| | - Martin Voss
- Charité - Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Institute of Biochemistry, Charitéplatz 1, 10117 Berlin, Germany
| | - Karin Klingel
- University of Tübingen, Cardiopathology, Institute for Pathology and Neuropathology, Tübingen, Germany
| | - Joachim Spranger
- Deutsches Zentrum für Herz-Kreislauf-Forschung, partner site Berlin, Berlin, Germany
- Charité - Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Department of Endocrinology, Diabetes and Nutrition, Berlin, Germany
| | - Kostja Renko
- German Federal Institute for Risk Assessment (BfR), German Centre for the Protection of Laboratory Animals (Bf3R), Berlin, Germany
| | - Markus Ralser
- Charité - Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Core Facility—High-Throughput Mass Spectrometry, Berlin, Germany
| | - Michael Mülleder
- Charité - Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Core Facility—High-Throughput Mass Spectrometry, Berlin, Germany
| | - Arnd Heuser
- Max-Delbrueck-Center (MDC) for Molecular Medicine, Animal Phenotyping Platform, Berlin, Germany
| | - Klaus-Peter Knobeloch
- University of Freiburg, Institute of Neuropathology, Freiburg, Germany
- CIBSS - Centre for Integrative Biological Signalling Studies, University of Freiburg, Freiburg, Germany
| | - Patrick Scheerer
- Deutsches Zentrum für Herz-Kreislauf-Forschung, partner site Berlin, Berlin, Germany
- Charité - Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Institute of Medical Physics and Biophysics, Group Protein X-ray Crystallography and Signal Transduction, Charitéplatz 1, Berlin, Germany
| | - Jennifer Kirwan
- Berlin Institute of Health at Charité Universitätsmedizin, Metabolomics, Charitéplatz 1 Berlin 10117, Germany
| | - Ulrike Brüning
- Berlin Institute of Health at Charité Universitätsmedizin, Metabolomics, Charitéplatz 1 Berlin 10117, Germany
| | - Nikolaus Berndt
- German Institute of Human Nutrition Potsdam-Rehbruecke (DIfE), Department of Molecular Toxicology, Nuthetal, Germany
- Deutsches Herzzentrum der Charité (DHZC), Institute of Computer-assisted Cardiovascular Medicine, Berlin, Germany
- Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Berlin, Germany
| | - Francis Impens
- Department of Biomolecular Medicine, Ghent University, Ghent, Belgium
- VIB-UGent Center for Medical Biotechnology, Ghent, Belgium
- VIB Proteomics Core, Ghent, Belgium
| | - Antje Beling
- Charité - Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Institute of Biochemistry, Charitéplatz 1, 10117 Berlin, Germany
- Deutsches Zentrum für Herz-Kreislauf-Forschung, partner site Berlin, Berlin, Germany
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2
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Ba C, Tian C, Bo X, Xu C, Zhang Y, Sun X, Nan Y, Wu C. Porcine HERC6 acts as major E3 ligase for ISGylation and is auto-ISGylated for effective ISGylation in porcine. Microb Pathog 2024; 190:106633. [PMID: 38554778 DOI: 10.1016/j.micpath.2024.106633] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2023] [Revised: 03/22/2024] [Accepted: 03/26/2024] [Indexed: 04/02/2024]
Abstract
Interferon-stimulated gene product 15 (ISG15) can be conjugated to substrates through ISGylation. Currently, the E3 ligase for porcine ISGylation remains unclear. Here, we identified porcine HERC5 and HERC6 (pHERC5/6) as ISGylation E3 ligases with pHERC6 acting as a major one by reconstitution of porcine ISGylation system in HEK-293 T cell via co-transfecting E1, E2 and porcine ISG15(pISG15) genes. Meanwhile, our data demonstrated that co-transfection of pISG15 and pHERC5/6 was sufficient to confer ISGylation, suggesting E1 and E2 of ISGylation are interchangeable between human and porcine. Using an immunoprecipitation based ISGylation analysis, our data revealed pHERC6 was a substrate for ISGylation and confirmed that K707 and K993 of pHERC6 were auto-ISGylation sites. Mutation of these sites reduced pHERC6 half-life and inhibited ISGylation, suggesting that auto-ISGylation of pHERC6 was required for effective ISGylation. Conversely, sustained ISGylation induced by overexpression of pISG15 and pHERC6 could be inhibited by a well-defined porcine ISGylation antagonist, the ovarian tumor (OTU) protease domain of Porcine Reproductive and Respiratory Syndrome Virus (PRRSV)-nsp2 and PRRSV-nsp1β, further indicating such method could be used for identification of virus-encoded ISG15 antagonist. In conclusion, our study contributes new insights towards porcine ISGylation system and provides a novel tool for screening viral-encoded ISG15 antagonist.
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Affiliation(s)
- Cuiyu Ba
- Department of Preventive Veterinary Medicine, College of Veterinary Medicine, Northwest A&F University, Yangling, Shaanxi, 712100, China
| | - Chaonan Tian
- Department of Preventive Veterinary Medicine, College of Veterinary Medicine, Northwest A&F University, Yangling, Shaanxi, 712100, China
| | - Xueying Bo
- Department of Preventive Veterinary Medicine, College of Veterinary Medicine, Northwest A&F University, Yangling, Shaanxi, 712100, China
| | - Chang Xu
- Department of Preventive Veterinary Medicine, College of Veterinary Medicine, Northwest A&F University, Yangling, Shaanxi, 712100, China
| | - Yi Zhang
- Department of Preventive Veterinary Medicine, College of Veterinary Medicine, Northwest A&F University, Yangling, Shaanxi, 712100, China
| | - Xiangyu Sun
- Department of Preventive Veterinary Medicine, College of Veterinary Medicine, Northwest A&F University, Yangling, Shaanxi, 712100, China
| | - Yuchen Nan
- Department of Preventive Veterinary Medicine, College of Veterinary Medicine, Northwest A&F University, Yangling, Shaanxi, 712100, China.
| | - Chunyan Wu
- Department of Preventive Veterinary Medicine, College of Veterinary Medicine, Northwest A&F University, Yangling, Shaanxi, 712100, China.
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3
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Álvarez E, Falqui M, Sin L, McGrail JP, Perdiguero B, Coloma R, Marcos-Villar L, Tárrega C, Esteban M, Gómez CE, Guerra S. Unveiling the Multifaceted Roles of ISG15: From Immunomodulation to Therapeutic Frontiers. Vaccines (Basel) 2024; 12:153. [PMID: 38400136 PMCID: PMC10891536 DOI: 10.3390/vaccines12020153] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2023] [Revised: 01/24/2024] [Accepted: 01/30/2024] [Indexed: 02/25/2024] Open
Abstract
The Interferon Stimulated Gene 15 (ISG15), a unique Ubiquitin-like (Ubl) modifier exclusive to vertebrates, plays a crucial role in the immune system. Primarily induced by interferon (IFN) type I, ISG15 functions through diverse mechanisms: (i) covalent protein modification (ISGylation); (ii) non-covalent intracellular action; and (iii) exerting extracellular cytokine activity. These various roles highlight its versatility in influencing numerous cellular pathways, encompassing DNA damage response, autophagy, antiviral response, and cancer-related processes, among others. The well-established antiviral effects of ISGylation contrast with its intriguing dual role in cancer, exhibiting both suppressive and promoting effects depending on the tumour type. The multifaceted functions of ISG15 extend beyond intracellular processes to extracellular cytokine signalling, influencing immune response, chemotaxis, and anti-tumour effects. Moreover, ISG15 emerges as a promising adjuvant in vaccine development, enhancing immune responses against viral antigens and demonstrating efficacy in cancer models. As a therapeutic target in cancer treatment, ISG15 exhibits a double-edged nature, promoting or suppressing oncogenesis depending on the tumour context. This review aims to contribute to future studies exploring the role of ISG15 in immune modulation and cancer therapy, potentially paving the way for the development of novel therapeutic interventions, vaccine development, and precision medicine.
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Affiliation(s)
- Enrique Álvarez
- Department of Molecular and Cellular Biology, Centro Nacional de Biotecnología, Consejo Superior de Investigaciones Científicas (CSIC), 28049 Madrid, Spain; (E.Á.); (L.S.); (B.P.); (L.M.-V.); (M.E.)
| | - Michela Falqui
- Department of Preventive Medicine, Public Health and Microbiology, Universidad Autónoma de Madrid, 28049 Madrid, Spain; (M.F.); (J.P.M.); (R.C.); (C.T.)
| | - Laura Sin
- Department of Molecular and Cellular Biology, Centro Nacional de Biotecnología, Consejo Superior de Investigaciones Científicas (CSIC), 28049 Madrid, Spain; (E.Á.); (L.S.); (B.P.); (L.M.-V.); (M.E.)
- Centro de Investigación Biomédica en Red de Enfermedades Infecciosas (CIBERINFEC), Instituto de Salud Carlos III (ISCIII), 28029 Madrid, Spain
| | - Joseph Patrick McGrail
- Department of Preventive Medicine, Public Health and Microbiology, Universidad Autónoma de Madrid, 28049 Madrid, Spain; (M.F.); (J.P.M.); (R.C.); (C.T.)
| | - Beatriz Perdiguero
- Department of Molecular and Cellular Biology, Centro Nacional de Biotecnología, Consejo Superior de Investigaciones Científicas (CSIC), 28049 Madrid, Spain; (E.Á.); (L.S.); (B.P.); (L.M.-V.); (M.E.)
- Centro de Investigación Biomédica en Red de Enfermedades Infecciosas (CIBERINFEC), Instituto de Salud Carlos III (ISCIII), 28029 Madrid, Spain
| | - Rocío Coloma
- Department of Preventive Medicine, Public Health and Microbiology, Universidad Autónoma de Madrid, 28049 Madrid, Spain; (M.F.); (J.P.M.); (R.C.); (C.T.)
| | - Laura Marcos-Villar
- Department of Molecular and Cellular Biology, Centro Nacional de Biotecnología, Consejo Superior de Investigaciones Científicas (CSIC), 28049 Madrid, Spain; (E.Á.); (L.S.); (B.P.); (L.M.-V.); (M.E.)
- Centro de Investigación Biomédica en Red de Enfermedades Infecciosas (CIBERINFEC), Instituto de Salud Carlos III (ISCIII), 28029 Madrid, Spain
| | - Céline Tárrega
- Department of Preventive Medicine, Public Health and Microbiology, Universidad Autónoma de Madrid, 28049 Madrid, Spain; (M.F.); (J.P.M.); (R.C.); (C.T.)
| | - Mariano Esteban
- Department of Molecular and Cellular Biology, Centro Nacional de Biotecnología, Consejo Superior de Investigaciones Científicas (CSIC), 28049 Madrid, Spain; (E.Á.); (L.S.); (B.P.); (L.M.-V.); (M.E.)
| | - Carmen Elena Gómez
- Department of Molecular and Cellular Biology, Centro Nacional de Biotecnología, Consejo Superior de Investigaciones Científicas (CSIC), 28049 Madrid, Spain; (E.Á.); (L.S.); (B.P.); (L.M.-V.); (M.E.)
- Centro de Investigación Biomédica en Red de Enfermedades Infecciosas (CIBERINFEC), Instituto de Salud Carlos III (ISCIII), 28029 Madrid, Spain
| | - Susana Guerra
- Department of Preventive Medicine, Public Health and Microbiology, Universidad Autónoma de Madrid, 28049 Madrid, Spain; (M.F.); (J.P.M.); (R.C.); (C.T.)
- Department of Microbiology, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA
- Global Health and Emerging Pathogens Institute, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA
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4
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Herzog AM, Göbel K, Marongiu L, Ruetalo N, Alonso MC, Leischner C, Busch C, Burkard M, Lauer UM, Geurink PP, Knobeloch KP, Schindler M, Fritz G, Venturelli S. Compounds derived from Humulus lupulus inhibit SARS-CoV-2 papain-like protease and virus replication. PHYTOMEDICINE : INTERNATIONAL JOURNAL OF PHYTOTHERAPY AND PHYTOPHARMACOLOGY 2024; 123:155176. [PMID: 37976697 DOI: 10.1016/j.phymed.2023.155176] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/04/2023] [Revised: 10/27/2023] [Accepted: 10/29/2023] [Indexed: 11/19/2023]
Abstract
BACKGROUND Selected natural compounds exhibit very good antiviral properties. Especially, the medicinal plant Humulus lupulus (hop) contains several secondary plant metabolites some of which have previously shown antiviral activities. Among them, the prenylated chalcone xanthohumol (XN) demonstrated to be a potent inhibitor of the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) main protease (Mpro). HYPOTHESIS/PURPOSE Following the finding that xanthohumol (XN) is a potent inhibitor of SARS-CoV-2 Mpro, the effect of XN and its major derivatives isoxanthohumol (IXN), 6-prenylnaringenin (6-PN), and 8-prenylnaringenin (8-PN) from hops on SARS-CoV-2 papain-like protease (PLpro) were investigated. STUDY DESIGN The modulatory effect of the hop compounds on PLpro were studied first in silico and then in vitro. In addition, the actual effect of hop compounds on the replication of SARS-CoV-2 in host cells was investigated. METHODS In silico docking analysis was used to predict the binding affinity of hop compounds to the active site of PLpro. A recombinant PLpro was cloned, purified, characterized, and analyzed by small-angle X-ray scattering (SAXS), deISGylation assays, and kinetic analyses. Antiviral activity of hop compounds was assessed using the fluorescently labeled wildtype SARS-CoV-2 (icSARS-CoV-2-mNG) in Caco-2 host cells. RESULTS Our in silico docking suggests that the purified hop compounds bind to the active site of SARS-CoV-2 PLpro blocking the access of its natural substrates. The hop-derived compounds inhibit SARS-CoV-2 PLpro with half maximal inhibitory concentration (IC50) values in the range of 59-162 µM. Furthermore, we demonstrate that XN and 6-PN, in particular, impede viral replication with IC50 values of 3.3 µM and 7.3 µM, respectively. CONCLUSION In addition to the already known inhibition of Mpro by XN, our results show, for the first time, that hop-derived compounds target also SARS-CoV-2 PLpro which is a promising therapeutic target as it contributes to both viral replication and modulation of the immune system. These findings support the possibility to develop new hop-derived antiviral drugs targeting human coronaviruses.
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Affiliation(s)
- Anna-Maria Herzog
- Department of Cellular Microbiology, University of Hohenheim, 70599 Stuttgart, Germany
| | - Katharina Göbel
- Department of Cellular Microbiology, University of Hohenheim, 70599 Stuttgart, Germany
| | - Luigi Marongiu
- Department of Internal Medicine VIII, University Hospital Tuebingen, 72076 Tuebingen, Germany; Department of Nutritional Biochemistry, University of Hohenheim, 70599 Stuttgart, Germany
| | - Natalia Ruetalo
- Institute for Medical Virology and Epidemiology of Viral Diseases, University Hospital Tuebingen, 72076 Tuebingen, Germany
| | - Marta Campos Alonso
- Institute of Neuropathology, Faculty of Medicine, University of Freiburg, 79106 Freiburg, Germany
| | - Christian Leischner
- Department of Nutritional Biochemistry, University of Hohenheim, 70599 Stuttgart, Germany
| | | | - Markus Burkard
- Department of Nutritional Biochemistry, University of Hohenheim, 70599 Stuttgart, Germany
| | - Ulrich M Lauer
- Department of Internal Medicine VIII, University Hospital Tuebingen, 72076 Tuebingen, Germany
| | - Paul P Geurink
- Department of Cell and Chemical Biology, Leiden University Medical Center, 2333 ZC Leiden, The Netherlands
| | - Klaus-Peter Knobeloch
- Institute of Neuropathology, Faculty of Medicine, University of Freiburg, 79106 Freiburg, Germany
| | - Michael Schindler
- Institute for Medical Virology and Epidemiology of Viral Diseases, University Hospital Tuebingen, 72076 Tuebingen, Germany.
| | - Günter Fritz
- Department of Cellular Microbiology, University of Hohenheim, 70599 Stuttgart, Germany.
| | - Sascha Venturelli
- Department of Nutritional Biochemistry, University of Hohenheim, 70599 Stuttgart, Germany; Institute of Physiology, Department of Vegetative and Clinical Physiology, University Hospital Tuebingen, 72076 Tuebingen, Germany.
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5
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Miyauchi S, Arimoto KI, Liu M, Zhang Y, Zhang DE. Reprogramming of tumor-associated macrophages via NEDD4-mediated CSF1R degradation by targeting USP18. Cell Rep 2023; 42:113560. [PMID: 38100351 PMCID: PMC10822669 DOI: 10.1016/j.celrep.2023.113560] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2023] [Revised: 07/25/2023] [Accepted: 11/23/2023] [Indexed: 12/17/2023] Open
Abstract
Tumor-associated myeloid cells modulate the tumor microenvironment and affect tumor progression. Type I interferon (IFN-I) has multiple effects on tumors and immune response, and ubiquitin-specific peptidase 18 (USP18) functions as a negative regulator of IFN-I signal transduction. This study aims to examine the function of IFN-I in myeloid cells during tumor progression. Here, we show that deletion of USP18 in myeloid cells suppresses tumor progression. Enhanced IFN-I signaling and blocked USP18 expression prompt downregulation of colony stimulating factor 1 receptor (CSF1R) and polarization of tumor-associated macrophages toward pro-inflammatory phenotypes. Further in vitro experiments reveal that downregulation of CSF1R is mediated by ubiquitin-proteasome degradation via E3 ligase neural precursor cell-expressed, developmentaly downregulated 4 (NEDD4) and the IFN-induced increase in ubiquitin E2 ubiquitin-conjugating enzyme H5. USP18 impairs ubiquitination and subsequent degradation of CSF1R by interrupting NEDD4 binding to CSF1R. These results reveal a previously unappreciated role of IFN-I in macrophage polarization by regulating CSF1R via USP18 and suggest targeting USP18 in myeloid-lineage cells as an effective strategy for IFN-based therapies.
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Affiliation(s)
- Sayuri Miyauchi
- Moores Cancer Center, University of California San Diego, La Jolla, CA 92037, USA
| | - Kei-Ichiro Arimoto
- Moores Cancer Center, University of California San Diego, La Jolla, CA 92037, USA
| | - Mengdan Liu
- Moores Cancer Center, University of California San Diego, La Jolla, CA 92037, USA; School of Biological Sciences, University of California San Diego, La Jolla, CA 92037, USA
| | - Yue Zhang
- Moores Cancer Center, University of California San Diego, La Jolla, CA 92037, USA; School of Biological Sciences, University of California San Diego, La Jolla, CA 92037, USA
| | - Dong-Er Zhang
- Moores Cancer Center, University of California San Diego, La Jolla, CA 92037, USA; School of Biological Sciences, University of California San Diego, La Jolla, CA 92037, USA; Department of Pathology, University of California San Diego, La Jolla, CA 92037, USA.
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6
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Clancy A, Rusilowicz-Jones EV, Wallace I, Swatek KN, Urbé S, Clague MJ. ISGylation-independent protection of cell growth by USP18 following interferon stimulation. Biochem J 2023; 480:1571-1581. [PMID: 37756534 PMCID: PMC10586769 DOI: 10.1042/bcj20230301] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2023] [Revised: 09/20/2023] [Accepted: 09/26/2023] [Indexed: 09/29/2023]
Abstract
Type 1 interferon stimulation highly up-regulates all elements of a ubiquitin-like conjugation system that leads to ISGylation of target proteins. An ISG15-specific member of the deubiquitylase family, USP18, is up-regulated in a co-ordinated manner. USP18 can also provide a negative feedback by inhibiting JAK-STAT signalling through protein interactions independently of DUB activity. Here, we provide an acute example of this phenomenon, whereby the early expression of USP18, post-interferon treatment of HCT116 colon cancer cells is sufficient to fully suppress the expression of the ISG15 E1 enzyme, UBA7. Stimulation of lung adenocarcinoma A549 cells with interferon reduces their growth rate but they remain viable. In contrast, A549 USP18 knock-out cells show similar growth characteristics under basal conditions, but upon interferon stimulation, a profound inhibition of cell growth is observed. We show that this contingency on USP18 is independent of ISGylation, suggesting non-catalytic functions are required for viability. We also demonstrate that global deISGylation kinetics are very slow compared with deubiquitylation. This is not influenced by USP18 expression, suggesting that enhanced ISGylation in USP18 KO cells reflects increased conjugating activity.
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Affiliation(s)
- Anne Clancy
- Biochemistry, Cell and Systems Biology, Institute of Systems, Molecular and Integrative Biology, University of Liverpool, Crown St., Liverpool L69 3BX, U.K
| | - Emma V. Rusilowicz-Jones
- Biochemistry, Cell and Systems Biology, Institute of Systems, Molecular and Integrative Biology, University of Liverpool, Crown St., Liverpool L69 3BX, U.K
| | - Iona Wallace
- MRC Protein Phosphorylation and Ubiquitylation Unit, School of Life Sciences, University of Dundee, Dundee DD1 5EH, U.K
| | - Kirby N. Swatek
- MRC Protein Phosphorylation and Ubiquitylation Unit, School of Life Sciences, University of Dundee, Dundee DD1 5EH, U.K
| | - Sylvie Urbé
- Biochemistry, Cell and Systems Biology, Institute of Systems, Molecular and Integrative Biology, University of Liverpool, Crown St., Liverpool L69 3BX, U.K
| | - Michael J. Clague
- Biochemistry, Cell and Systems Biology, Institute of Systems, Molecular and Integrative Biology, University of Liverpool, Crown St., Liverpool L69 3BX, U.K
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7
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Bécares M, Albert M, Tárrega C, Coloma R, Falqui M, Luhmann EK, Radoshevich L, Guerra S. ISG15 Is Required for the Dissemination of Vaccinia Virus Extracellular Virions. Microbiol Spectr 2023; 11:e0450822. [PMID: 37036376 PMCID: PMC10269806 DOI: 10.1128/spectrum.04508-22] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2022] [Accepted: 03/15/2023] [Indexed: 04/11/2023] Open
Abstract
Viruses have developed many different strategies to counteract immune responses, and Vaccinia virus (VACV) is one of a kind in this aspect. To ensure an efficient infection, VACV undergoes a complex morphogenetic process resulting in the production of two types of infective virions: intracellular mature virus (MV) and extracellular enveloped virus (EV), whose spread depends on different dissemination mechanisms. MVs disseminate after cell lysis, whereas EVs are released or propelled in actin tails from living cells. Here, we show that ISG15 participates in the control of VACV dissemination. Infection of Isg15-/- mouse embryonic fibroblasts with VACV International Health Department-J (IHD-J) strain resulted in decreased EV production, concomitant with reduced induction of actin tails and the abolition of comet-shaped plaque formation, compared to Isg15+/+ cells. Transmission electron microscopy revealed the accumulation of intracellular virus particles and a decrease in extracellular virus particles in the absence of interferon-stimulated gene 15 (ISG15), a finding consistent with altered virus egress. Immunoblot and quantitative proteomic analysis of sucrose gradient-purified virions from both genotypes reported differences in protein levels and composition of viral proteins present on virions, suggesting an ISG15-mediated control of viral proteome. Lastly, the generation of a recombinant IHD-J expressing V5-tagged ISG15 (IHD-J-ISG15) allowed us to identify several viral proteins as potential ISG15 targets, highlighting the proteins A34 and A36, which are essential for EV formation. Altogether, our results indicate that ISG15 is an important host factor in the regulation of VACV dissemination. IMPORTANCE Viral infections are a constant battle between the virus and the host. While the host's only goal is victory, the main purpose of the virus is to spread and conquer new territories at the expense of the host's resources. Along millions of years of incessant encounters, poxviruses have developed a unique strategy consisting in the production two specialized "troops": intracellular mature virions (MVs) and extracellular virions (EVs). MVs mediate transmission between hosts, and EVs ensure advance on the battlefield mediating the long-range dissemination. The mechanism by which the virus "decides" to shed from the primary site of infection and its significant impact in viral transmission is not yet fully established. Here, we demonstrate that this process is finely regulated by ISG15/ISGylation, an interferon-induced ubiquitin-like protein with broad antiviral activity. Studying the mechanism that viruses use during infection could result in new ways of understanding our perpetual war against disease and how we might win the next great battle.
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Affiliation(s)
- Martina Bécares
- Department of Preventive Medicine, Public Health and Microbiology, Universidad Autónoma de Madrid, Madrid, Spain
| | - Manuel Albert
- Department of Preventive Medicine, Public Health and Microbiology, Universidad Autónoma de Madrid, Madrid, Spain
| | - Céline Tárrega
- Department of Preventive Medicine, Public Health and Microbiology, Universidad Autónoma de Madrid, Madrid, Spain
| | - Rocío Coloma
- Department of Preventive Medicine, Public Health and Microbiology, Universidad Autónoma de Madrid, Madrid, Spain
| | - Michela Falqui
- Department of Preventive Medicine, Public Health and Microbiology, Universidad Autónoma de Madrid, Madrid, Spain
| | - Emma K. Luhmann
- Department of Microbiology and Immunology, University of Iowa Carver College of Medicine, Iowa City, Iowa, USA
| | - Lilliana Radoshevich
- Department of Microbiology and Immunology, University of Iowa Carver College of Medicine, Iowa City, Iowa, USA
| | - Susana Guerra
- Department of Preventive Medicine, Public Health and Microbiology, Universidad Autónoma de Madrid, Madrid, Spain
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Ruan H, Wu J, Zhang F, Jin Z, Tian J, Xia J, Luo J, Yang M. Zearalenone Exposure Disrupts STAT-ISG15 in Rat Colon: A Potential Linkage between Zearalenone and Inflammatory Bowel Disease. Toxins (Basel) 2023; 15:392. [PMID: 37368693 DOI: 10.3390/toxins15060392] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2023] [Revised: 06/01/2023] [Accepted: 06/02/2023] [Indexed: 06/29/2023] Open
Abstract
Zearalenone (ZEN), a prevalent mycotoxin contaminating food and known for its intestinal toxicity, has been suggested as a potential risk factor for inflammatory bowel disease (IBD), although the exact relationship between ZEN exposure and IBD remains unclear. In this study, we established a rat model of colon toxicity induced by ZEN exposure to investigate the key targets of ZEN-induced colon toxicity and explore the underlying connection between ZEN exposure and IBD. Histological staining of the rat colon revealed significant pathological changes resulting from ZEN exposure (p < 0.01). Furthermore, the proteomic analysis demonstrated a notable upregulation of protein expression levels, specifically STAT2 (0.12 ± 0.0186), STAT6 (0.36 ± 0.0475) and ISG15 (0.43 ± 0.0226) in the rat colon (p < 0.05). Utilizing bioinformatics analysis, we combined ZEN exposure and IBD clinical sample databases to reveal that ZEN exposure may increase the risk of IBD through activation of the STAT-ISG15 pathway. This study identified novel targets for ZEN-induced intestinal toxicity, providing the basis for further study of ZEN exposure to IBD.
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Affiliation(s)
- Haonan Ruan
- Key Laboratory of Bioactive Substances and Resources Utilization of Chinese Herbal Medicine, Ministry of Education, Institute of Medicinal Plant Development Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100193, China
| | - Jiashuo Wu
- Peking-Tsinghua Center for Life Sciences, Academy for Advanced Interdisciplinary Studies, Peking University, Beijing 100091, China
| | - Fangqing Zhang
- Peking-Tsinghua Center for Life Sciences, Academy for Advanced Interdisciplinary Studies, Peking University, Beijing 100091, China
| | - Ziyue Jin
- Key Laboratory of Bioactive Substances and Resources Utilization of Chinese Herbal Medicine, Ministry of Education, Institute of Medicinal Plant Development Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100193, China
| | - Jiao Tian
- Key Laboratory of Bioactive Substances and Resources Utilization of Chinese Herbal Medicine, Ministry of Education, Institute of Medicinal Plant Development Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100193, China
| | - Jing Xia
- School of Basic Medical Science, Peking University, Beijing 100191, China
| | - Jiaoyang Luo
- Key Laboratory of Bioactive Substances and Resources Utilization of Chinese Herbal Medicine, Ministry of Education, Institute of Medicinal Plant Development Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100193, China
| | - Meihua Yang
- Key Laboratory of Bioactive Substances and Resources Utilization of Chinese Herbal Medicine, Ministry of Education, Institute of Medicinal Plant Development Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100193, China
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9
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Toth KA, Schmitt EG, Cooper MA. Deficiencies and Dysregulation of STAT Pathways That Drive Inborn Errors of Immunity: Lessons from Patients and Mouse Models of Disease. JOURNAL OF IMMUNOLOGY (BALTIMORE, MD. : 1950) 2023; 210:1463-1472. [PMID: 37126806 PMCID: PMC10151837 DOI: 10.4049/jimmunol.2200905] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/12/2022] [Accepted: 01/11/2023] [Indexed: 05/03/2023]
Abstract
The STAT family proteins provide critical signals for immune cell development, differentiation, and proinflammatory and anti-inflammatory responses. Inborn errors of immunity (IEIs) are caused by single gene defects leading to immune deficiency and/or dysregulation, and they have provided opportunities to identify genes important for regulating the human immune response. Studies of patients with IEIs due to altered STAT signaling, and mouse models of these diseases, have helped to shape current understanding of the mechanisms whereby STAT signaling and protein interactions regulate immunity. Although many STAT signaling pathways are shared, clinical and immune phenotypes in patients with monogenic defects of STAT signaling highlight both redundant and nonredundant pathways. In this review, we provide an overview of the shared and unique signaling pathways used by STATs, phenotypes of IEIs with altered STAT signaling, and recent discoveries that have provided insight into the human immune response and treatment of disease.
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Affiliation(s)
- Kelsey A. Toth
- Department of Pediatrics, Division of Rheumatology/Immunology, Washington University in St. Louis, St. Louis, MO 63110
| | - Erica G. Schmitt
- Department of Pediatrics, Division of Rheumatology/Immunology, Washington University in St. Louis, St. Louis, MO 63110
| | - Megan A. Cooper
- Department of Pediatrics, Division of Rheumatology/Immunology, Washington University in St. Louis, St. Louis, MO 63110
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10
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Chen Y, Zhou J, Wu S, Wang L, Chen G, Chen D, Peng X, Miao YL, Mei S, Li F. ISG15 suppresses ovulation and female fertility by ISGylating ADAMTS1. Cell Biosci 2023; 13:84. [PMID: 37170317 PMCID: PMC10176748 DOI: 10.1186/s13578-023-01024-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2022] [Accepted: 03/31/2023] [Indexed: 05/13/2023] Open
Abstract
BACKGROUND ISGylation is a post-translational protein modification that regulates many life activities, including immunomodulation, antiviral responses, and embryo implantation. The exact contribution of ISGylation to folliculogenesis remains largely undefined. RESULTS Here, Isg15 knockout in mice causes hyperfertility along with sensitive ovarian responses to gonadotropin, such as increases in cumulus expansion and ovulation rate. Moreover, ISG15 represses the expression of ovulation-related genes in an ISGylation-dependent manner. Mechanistically, ISG15 binds to ADAMTS1 via the ISG15-conjugating system (UBA7, UBE2L6, and HERC6), ISGylating ADAMTS1 at the binding sites Lys309, Lys593, Lys597, and Lys602, resulting in ADAMTS1 degradation via a 20S proteasome-dependent pathway. CONCLUSION Taken together, the present study demonstrates that covalent ISG15 conjugation produces a novel regulatory axis of ISG15-ADAMTS1 that enhances the degradation of ADAMTS1, thereby compromising ovulation and female fertility.
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Affiliation(s)
- Yaru Chen
- Key Laboratory of Swine Genetics and Breeding of Ministry of Agriculture and Rural Affairs & Key Laboratory of Agricultural Animal Genetics, Breeding and Reproduction of Ministry of Education, Huazhong Agricultural University, Wuhan, 430070, China
| | - Jiawei Zhou
- Key Laboratory of Swine Genetics and Breeding of Ministry of Agriculture and Rural Affairs & Key Laboratory of Agricultural Animal Genetics, Breeding and Reproduction of Ministry of Education, Huazhong Agricultural University, Wuhan, 430070, China.
- Institute of Animal Science and Veterinary Medicine, Hubei Academy of Agricultural Sciences, Wuhan, 430064, China.
| | - Shang Wu
- Key Laboratory of Swine Genetics and Breeding of Ministry of Agriculture and Rural Affairs & Key Laboratory of Agricultural Animal Genetics, Breeding and Reproduction of Ministry of Education, Huazhong Agricultural University, Wuhan, 430070, China
| | - Lei Wang
- Key Laboratory of Swine Genetics and Breeding of Ministry of Agriculture and Rural Affairs & Key Laboratory of Agricultural Animal Genetics, Breeding and Reproduction of Ministry of Education, Huazhong Agricultural University, Wuhan, 430070, China
| | - Gaogui Chen
- Key Laboratory of Swine Genetics and Breeding of Ministry of Agriculture and Rural Affairs & Key Laboratory of Agricultural Animal Genetics, Breeding and Reproduction of Ministry of Education, Huazhong Agricultural University, Wuhan, 430070, China
| | - Dake Chen
- Key Laboratory of Swine Genetics and Breeding of Ministry of Agriculture and Rural Affairs & Key Laboratory of Agricultural Animal Genetics, Breeding and Reproduction of Ministry of Education, Huazhong Agricultural University, Wuhan, 430070, China
| | - Xianwen Peng
- Institute of Animal Science and Veterinary Medicine, Hubei Academy of Agricultural Sciences, Wuhan, 430064, China
| | - Yi-Liang Miao
- Key Laboratory of Swine Genetics and Breeding of Ministry of Agriculture and Rural Affairs & Key Laboratory of Agricultural Animal Genetics, Breeding and Reproduction of Ministry of Education, Huazhong Agricultural University, Wuhan, 430070, China
| | - Shuqi Mei
- Institute of Animal Science and Veterinary Medicine, Hubei Academy of Agricultural Sciences, Wuhan, 430064, China
| | - Fenge Li
- Key Laboratory of Swine Genetics and Breeding of Ministry of Agriculture and Rural Affairs & Key Laboratory of Agricultural Animal Genetics, Breeding and Reproduction of Ministry of Education, Huazhong Agricultural University, Wuhan, 430070, China.
- The Cooperative Innovation Center for Sustainable Pig Production, Wuhan, 430070, China.
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11
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Munnur D, Banducci-Karp A, Sanyal S. ISG15 driven cellular responses to virus infection. Biochem Soc Trans 2022; 50:1837-1846. [PMID: 36416643 DOI: 10.1042/bst20220839] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2022] [Revised: 11/01/2022] [Accepted: 11/04/2022] [Indexed: 11/24/2022]
Abstract
One of the hallmarks of antiviral responses to infection is the production of interferons and subsequently of interferon stimulated genes. Interferon stimulated gene 15 (ISG15) is among the earliest and most abundant proteins induced upon interferon signalling, encompassing versatile functions in host immunity. ISG15 is a ubiquitin like modifier that can be conjugated to substrates in a process analogous to ubiquitylation and referred to as ISGylation. The free unconjugated form can either exist intracellularly or be secreted to function as a cytokine. Interestingly, ISG15 has been reported to be both advantageous and detrimental to the development of immunopathology during infection. This review describes recent findings on the role of ISG15 in antiviral responses in human infection models, with a particular emphasis on autophagy, inflammatory responses and cellular metabolism combined with viral strategies of counteracting them. The field of ISGylation has steadily gained momentum; however much of the previous studies of virus infections conducted in mouse models are in sharp contrast with recent findings in human cells, underscoring the need to summarise our current understanding of its potential antiviral function in humans and identify knowledge gaps which need to be addressed in future studies.
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Affiliation(s)
- Deeksha Munnur
- Sir William Dunn School of Pathology, University of Oxford, South Parks Road, Oxford OX1 3RE, U.K
| | - Adrianna Banducci-Karp
- Sir William Dunn School of Pathology, University of Oxford, South Parks Road, Oxford OX1 3RE, U.K
| | - Sumana Sanyal
- Sir William Dunn School of Pathology, University of Oxford, South Parks Road, Oxford OX1 3RE, U.K
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12
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Coronaviral PLpro proteases and the immunomodulatory roles of conjugated versus free Interferon Stimulated Gene product-15 (ISG15). Semin Cell Dev Biol 2022; 132:16-26. [PMID: 35764457 PMCID: PMC9233553 DOI: 10.1016/j.semcdb.2022.06.005] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2021] [Revised: 06/12/2022] [Accepted: 06/13/2022] [Indexed: 12/14/2022]
Abstract
Ubiquitin-like proteins (Ubls) share some features with ubiquitin (Ub) such as their globular 3D structure and the ability to attach covalently to other proteins. Interferon Stimulated Gene 15 (ISG15) is an abundant Ubl that similar to Ub, marks many hundreds of cellular proteins, altering their fate. In contrast to Ub, , ISG15 requires interferon (IFN) induction to conjugate efficiently to other proteins. Moreover, despite the multitude of E3 ligases for Ub-modified targets, a single E3 ligase termed HERC5 (in humans) is responsible for the bulk of ISG15 conjugation. Targets include both viral and cellular proteins spanning an array of cellular compartments and metabolic pathways. So far, no common structural or biochemical feature has been attributed to these diverse substrates, raising questions about how and why they are selected. Conjugation of ISG15 mitigates some viral and bacterial infections and is linked to a lower viral load pointing to the role of ISG15 in the cellular immune response. In an apparent attempt to evade the immune response, some viruses try to interfere with the ISG15 pathway. For example, deconjugation of ISG15 appears to be an approach taken by coronaviruses to interfere with ISG15 conjugates. Specifically, coronaviruses such as SARS-CoV, MERS-CoV, and SARS-CoV-2, encode papain-like proteases (PL1pro) that bear striking structural and catalytic similarities to the catalytic core domain of eukaryotic deubiquitinating enzymes of the Ubiquitin-Specific Protease (USP) sub-family. The cleavage specificity of these PLpro enzymes is for flexible polypeptides containing a consensus sequence (R/K)LXGG, enabling them to function on two seemingly unrelated categories of substrates: (i) the viral polyprotein 1 (PP1a, PP1ab) and (ii) Ub- or ISG15-conjugates. As a result, PLpro enzymes process the viral polyprotein 1 into an array of functional proteins for viral replication (termed non-structural proteins; NSPs), and it can remove Ub or ISG15 units from conjugates. However, by de-conjugating ISG15, the virus also creates free ISG15, which in turn may affect the immune response in two opposite pathways: free ISG15 negatively regulates IFN signaling in humans by binding non-catalytically to USP18, yet at the same time free ISG15 can be secreted from the cell and induce the IFN pathway of the neighboring cells. A deeper understanding of this protein-modification pathway and the mechanisms of the enzymes that counteract it will bring about effective clinical strategies related to viral and bacterial infections.
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13
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Vimentin inhibits type I interferon production by disrupting the TBK1-IKKε-IRF3 axis. Cell Rep 2022; 41:111469. [DOI: 10.1016/j.celrep.2022.111469] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2022] [Revised: 07/20/2022] [Accepted: 09/19/2022] [Indexed: 11/23/2022] Open
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14
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Tecalco-Cruz AC, Ramírez-Jarquín JO, Zepeda-Cervantes J, Solleiro-Villavicencio H, Abraham-Juárez MJ. Ubiquitin-Specific Peptidase 18: A Multifaceted Protein Participating in Breast Cancer. Breast Cancer 2022. [DOI: 10.36255/exon-publications-breast-cancer-usp18] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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15
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Wang Z, Li T, Gong Z, Xie J. Role of ISG15 post-translational modification in immunity against Mycobacterium tuberculosis infection. Cell Signal 2022; 94:110329. [PMID: 35390466 DOI: 10.1016/j.cellsig.2022.110329] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2022] [Revised: 03/30/2022] [Accepted: 03/31/2022] [Indexed: 11/30/2022]
Abstract
ISG15 encoded by a type I interferon (IFN) inducible gene mediates an important cellular process called ISGylation. ISGylation emerges as a powerful host tactic against intracellular pathogens like Mycobacterium tuberculosis (Mtb). However, the exact role of ISGylation in immunity remains elusive. To shed light on how ISGylation, which is both interesting and complex, participates in immunity against Mtb, this manuscript summarized the current knowledge about the structural characteristics and targets of ISG15 and how ISGylation cross-talks with other host post-translational modifications to exert its effect.
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Affiliation(s)
- Zilu Wang
- Institute of Modern Biopharmaceuticals, State Key Laboratory Breeding Base of Eco-Environment and Bio-Resource of the Three Gorges Area, Key Laboratory of Eco-environments in Three Gorges Reservoir Region, Ministry of Education, School of Life Sciences, Southwest University, Chongqing 400715, China
| | - Tongxin Li
- Chongqing Public Health Medical Center, Southwest University Public Health Hospital, central laboratory Chongqing, 400030, China
| | - Zhen Gong
- Institute of Modern Biopharmaceuticals, State Key Laboratory Breeding Base of Eco-Environment and Bio-Resource of the Three Gorges Area, Key Laboratory of Eco-environments in Three Gorges Reservoir Region, Ministry of Education, School of Life Sciences, Southwest University, Chongqing 400715, China
| | - Jianping Xie
- Institute of Modern Biopharmaceuticals, State Key Laboratory Breeding Base of Eco-Environment and Bio-Resource of the Three Gorges Area, Key Laboratory of Eco-environments in Three Gorges Reservoir Region, Ministry of Education, School of Life Sciences, Southwest University, Chongqing 400715, China.
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16
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Mirzalieva O, Juncker M, Schwartzenburg J, Desai S. ISG15 and ISGylation in Human Diseases. Cells 2022; 11:cells11030538. [PMID: 35159348 PMCID: PMC8834048 DOI: 10.3390/cells11030538] [Citation(s) in RCA: 26] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2021] [Revised: 01/18/2022] [Accepted: 01/25/2022] [Indexed: 12/04/2022] Open
Abstract
Type I Interferons (IFNs) induce the expression of >500 genes, which are collectively called ISGs (IFN-stimulated genes). One of the earliest ISGs induced by IFNs is ISG15 (Interferon-Stimulated Gene 15). Free ISG15 protein synthesized from the ISG15 gene is post-translationally conjugated to cellular proteins and is also secreted by cells into the extracellular milieu. ISG15 comprises two ubiquitin-like domains (UBL1 and UBL2), each of which bears a striking similarity to ubiquitin, accounting for its earlier name ubiquitin cross-reactive protein (UCRP). Like ubiquitin, ISG15 harbors a characteristic β-grasp fold in both UBL domains. UBL2 domain has a conserved C-terminal Gly-Gly motif through which cellular proteins are appended via an enzymatic cascade similar to ubiquitylation called ISGylation. ISG15 protein is minimally expressed under physiological conditions. However, its IFN-dependent expression is aberrantly elevated or compromised in various human diseases, including multiple types of cancer, neurodegenerative disorders (Ataxia Telangiectasia and Amyotrophic Lateral Sclerosis), inflammatory diseases (Mendelian Susceptibility to Mycobacterial Disease (MSMD), bacteriopathy and viropathy), and in the lumbar spinal cords of veterans exposed to Traumatic Brain Injury (TBI). ISG15 and ISGylation have both inhibitory and/or stimulatory roles in the etiology and pathogenesis of human diseases. Thus, ISG15 is considered a “double-edged sword” for human diseases in which its expression is elevated. Because of the roles of ISG15 and ISGylation in cancer cell proliferation, migration, and metastasis, conferring anti-cancer drug sensitivity to tumor cells, and its elevated expression in cancer, neurodegenerative disorders, and veterans exposed to TBI, both ISG15 and ISGylation are now considered diagnostic/prognostic biomarkers and therapeutic targets for these ailments. In the current review, we shall cover the exciting journey of ISG15, spanning three decades from the bench to the bedside.
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Affiliation(s)
| | | | | | - Shyamal Desai
- Correspondence: ; Tel.: +1-504-568-4388; Fax: +1-504-568-2093
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17
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Barik S. Mechanisms of Viral Degradation of Cellular Signal Transducer and Activator of Transcription 2. Int J Mol Sci 2022; 23:ijms23010489. [PMID: 35008916 PMCID: PMC8745392 DOI: 10.3390/ijms23010489] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2021] [Revised: 12/28/2021] [Accepted: 12/31/2021] [Indexed: 12/31/2022] Open
Abstract
Virus infection of eukaryotes triggers cellular innate immune response, a major arm of which is the type I interferon (IFN) family of cytokines. Binding of IFN to cell surface receptors triggers a signaling cascade in which the signal transducer and activator of transcription 2 (STAT2) plays a key role, ultimately leading to an antiviral state of the cell. In retaliation, many viruses counteract the immune response, often by the destruction and/or inactivation of STAT2, promoted by specific viral proteins that do not possess protease activities of their own. This review offers a summary of viral mechanisms of STAT2 subversion with emphasis on degradation. Some viruses also destroy STAT1, another major member of the STAT family, but most viruses are selective in targeting either STAT2 or STAT1. Interestingly, degradation of STAT2 by a few viruses requires the presence of both STAT proteins. Available evidence suggests a mechanism in which multiple sites and domains of STAT2 are required for engagement and degradation by a multi-subunit degradative complex, comprising viral and cellular proteins, including the ubiquitin–proteasomal system. However, the exact molecular nature of this complex and the alternative degradation mechanisms remain largely unknown, as critically presented here with prospective directions of future study.
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Affiliation(s)
- Sailen Barik
- EonBio, 3780 Pelham Drive, Mobile, AL 36619, USA
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18
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González-Amor M, García-Redondo AB, Jorge I, Zalba G, Becares M, Ruiz-Rodríguez MJ, Rodríguez C, Bermeo H, Rodrigues-Díez R, Rios FJ, Montezano AC, Martínez-González J, Vázquez J, Redondo JM, Touyz RM, Guerra S, Salaices M, Briones AM. Interferon-stimulated gene 15 pathway is a novel mediator of endothelial dysfunction and aneurysms development in angiotensin II infused mice through increased oxidative stress. Cardiovasc Res 2021; 118:3250-3268. [PMID: 34672341 PMCID: PMC9799052 DOI: 10.1093/cvr/cvab321] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/06/2020] [Revised: 09/06/2021] [Accepted: 10/18/2021] [Indexed: 01/25/2023] Open
Abstract
AIMS Interferon-stimulated gene 15 (ISG15) encodes a ubiquitin-like protein that induces a reversible post-translational modification (ISGylation) and can also be secreted as a free form. ISG15 plays an essential role as host-defence response to microbial infection; however, its contribution to vascular damage associated with hypertension is unknown. METHODS AND RESULTS Bioinformatics identified ISG15 as a mediator of hypertension-associated vascular damage. ISG15 expression positively correlated with systolic and diastolic blood pressure and carotid intima-media thickness in human peripheral blood mononuclear cells. Consistently, Isg15 expression was enhanced in aorta from hypertension models and in angiotensin II (AngII)-treated vascular cells and macrophages. Proteomics revealed differential expression of proteins implicated in cardiovascular function, extracellular matrix and remodelling, and vascular redox state in aorta from AngII-infused ISG15-/- mice. Moreover, ISG15-/- mice were protected against AngII-induced hypertension, vascular stiffness, elastin remodelling, endothelial dysfunction, and expression of inflammatory and oxidative stress markers. Conversely, mice with excessive ISGylation (USP18C61A) show enhanced AngII-induced hypertension, vascular fibrosis, inflammation and reactive oxygen species (ROS) generation along with elastin breaks, aortic dilation, and rupture. Accordingly, human and murine abdominal aortic aneurysms showed augmented ISG15 expression. Mechanistically, ISG15 induces vascular ROS production, while antioxidant treatment prevented ISG15-induced endothelial dysfunction and vascular remodelling. CONCLUSION ISG15 is a novel mediator of vascular damage in hypertension through oxidative stress and inflammation.
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Affiliation(s)
| | - Ana B García-Redondo
- Present address. Departamento de Fisiología, Instituto de Investigación Hospital La Paz, Universidad Autónoma de Madrid, Madrid, Spain. This manuscript was handled by Deputy Editor Dr David G. Harrison
| | - Inmaculada Jorge
- CIBER de Enfermedades Cardiovasculares, ISCIII, Spain,Laboratorio de Proteómica Cardiovascular, Centro Nacional de Investigaciones Cardiovasculares, C. Melchor Fernández Almagro, 3, 28029 Madrid, Spain
| | - Guillermo Zalba
- Departamento de Bioquímica y Genética, Instituto de Investigación Sanitaria de Navarra, Facultad de Ciencias, Universidad de Navarra, C/ Irunlarrea, 1, Pamplona 31008 Navarra, Spain
| | - Martina Becares
- Departamento de Medicina Preventiva y Microbiología, Instituto de Investigación Hospital La Paz, Universidad Autónoma de Madrid, C/Arzobispo Morcillo 4, 28029 Madrid, Spain
| | - María J Ruiz-Rodríguez
- CIBER de Enfermedades Cardiovasculares, ISCIII, Spain,Grupo de Regulación Génica en Remodelado Cardiovascular e Inflamación, Centro Nacional de Investigaciones Cardiovasculares, C. Melchor Fernández Almagro, 3, 28029 Madrid, Spain
| | - Cristina Rodríguez
- CIBER de Enfermedades Cardiovasculares, ISCIII, Spain,Institut de Recerca Hospital de la Santa Creu i Sant Pau, C/ Sant Quintí, 77, 08041 Barcelona, Spain,Instituto de Investigación Biomédica Sant Pau, Barcelona, Spain
| | - Hugo Bermeo
- Departamento de Farmacología, Instituto de Investigación Hospital La Paz, Universidad Autónoma de Madrid, C/Arzobispo Morcillo 4, 28029 Madrid, Spain
| | - Raquel Rodrigues-Díez
- Departamento de Farmacología, Instituto de Investigación Hospital La Paz, Universidad Autónoma de Madrid, C/Arzobispo Morcillo 4, 28029 Madrid, Spain,CIBER de Enfermedades Cardiovasculares, ISCIII, Spain
| | - Francisco J Rios
- Institute of Cardiovascular and Medical Sciences, University of Glasgow, 126 University Place Glasgow G12 8TA, Glasgow, UK
| | - Augusto C Montezano
- Institute of Cardiovascular and Medical Sciences, University of Glasgow, 126 University Place Glasgow G12 8TA, Glasgow, UK
| | - Jose Martínez-González
- CIBER de Enfermedades Cardiovasculares, ISCIII, Spain,Instituto de Investigación Biomédica Sant Pau, Barcelona, Spain,Instituto de Investigaciones Biomédicas de Barcelona-Consejo Superior de Investigaciones Científicas (IIBB-CSIC), C/ Rosselló, 161, 08036, Barcelona, Spain,Instituto de Investigación Biomédica Sant Pau, Barcelona, Spain
| | - Jesús Vázquez
- CIBER de Enfermedades Cardiovasculares, ISCIII, Spain,Laboratorio de Proteómica Cardiovascular, Centro Nacional de Investigaciones Cardiovasculares, C. Melchor Fernández Almagro, 3, 28029 Madrid, Spain
| | - Juan Miguel Redondo
- CIBER de Enfermedades Cardiovasculares, ISCIII, Spain,Grupo de Regulación Génica en Remodelado Cardiovascular e Inflamación, Centro Nacional de Investigaciones Cardiovasculares, C. Melchor Fernández Almagro, 3, 28029 Madrid, Spain
| | - Rhian M Touyz
- Institute of Cardiovascular and Medical Sciences, University of Glasgow, 126 University Place Glasgow G12 8TA, Glasgow, UK
| | - Susana Guerra
- Departamento de Medicina Preventiva y Microbiología, Instituto de Investigación Hospital La Paz, Universidad Autónoma de Madrid, C/Arzobispo Morcillo 4, 28029 Madrid, Spain
| | - Mercedes Salaices
- Departamento de Farmacología, Instituto de Investigación Hospital La Paz, Universidad Autónoma de Madrid, C/Arzobispo Morcillo 4, 28029 Madrid, Spain,CIBER de Enfermedades Cardiovasculares, ISCIII, Spain
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19
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Ye H, Duan X, Yao M, Kang L, Li Y, Li S, Li B, Chen L. USP18 Mediates Interferon Resistance of Dengue Virus Infection. Front Microbiol 2021; 12:682380. [PMID: 34017322 PMCID: PMC8130619 DOI: 10.3389/fmicb.2021.682380] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2021] [Accepted: 04/07/2021] [Indexed: 01/15/2023] Open
Abstract
Previous studies demonstrated that dengue virus (DENV) infection developed resistance to type-I interferons (IFNα/β). The underlying mechanism remains unclear. USP18 is a negative regulator of IFNα/β signaling, and its expression level is significantly increased following DENV infection in cell lines and patients’ blood. Our previous study revealed that increased USP18 expression contributed to the IFN-α resistance of Hepatitis C Virus (HCV). However, the role of USP18 in DENV replication and resistance to IFN-α is elusive. In this current study, we aimed to explore the role of USP18 in DENV-2 replication and resistance to IFN-α. The level of USP18 was up-regulated by plasmid transfection and down-regulated by siRNA transfection in Hela cells. USP18, IFN-α, IFN-β expression, and DENV-2 replication were monitored by qRT-PCR and Western blot. The activation of the Jak/STAT signaling pathway was assessed at three levels: p-STAT1/p-STAT2 (Western blot), interferon-stimulated response element (ISRE) activity (Dual-luciferase assay), and interferon-stimulated genes (ISGs) expression (qRT-PCR). Our data showed that DENV-2 infection increased USP18 expression in Hela cells. USP18 overexpression promoted DENV-2 replication, while USP18 silence inhibited DENV-2 replication. Silence of USP18 potentiated the anti-DENV-2 activity of IFN-α through activation of the IFN-α-mediated Jak/STAT signaling pathway as shown by increased expression of p-STAT1/p-STAT2, enhanced ISRE activity, and elevated expression of some ISGs. Our data indicated that USP18 induced by DENV-2 infection is a critical host factor utilized by DENV-2 to confer antagonism on IFN-α.
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Affiliation(s)
- Haiyan Ye
- Institute of Blood Transfusion, Chinese Academy of Medical Sciences and Peking Union Medical College, Chengdu, China
| | - Xiaoqiong Duan
- Institute of Blood Transfusion, Chinese Academy of Medical Sciences and Peking Union Medical College, Chengdu, China
| | - Min Yao
- Institute of Blood Transfusion, Chinese Academy of Medical Sciences and Peking Union Medical College, Chengdu, China
| | - Lan Kang
- Institute of Blood Transfusion, Chinese Academy of Medical Sciences and Peking Union Medical College, Chengdu, China
| | - Yujia Li
- Institute of Blood Transfusion, Chinese Academy of Medical Sciences and Peking Union Medical College, Chengdu, China
| | - Shilin Li
- Institute of Blood Transfusion, Chinese Academy of Medical Sciences and Peking Union Medical College, Chengdu, China
| | - Bin Li
- Joint - Laboratory of Transfusion-Transmitted Infectious Diseases Between Institute of Blood Transfusion and Nanning Blood Center, Nanning Blood Center, Nanning, China
| | - Limin Chen
- Institute of Blood Transfusion, Chinese Academy of Medical Sciences and Peking Union Medical College, Chengdu, China.,Joint - Laboratory of Transfusion-Transmitted Infectious Diseases Between Institute of Blood Transfusion and Nanning Blood Center, Nanning Blood Center, Nanning, China.,Toronto General Research Institute, University of Toronto, Toronto, ON, Canada
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20
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Zhou Y, Song W, Wang C, Mu C, Li R. Integrated metabolomics and transcriptomics reveal the anti-aging effect of melanin from Sepiella maindroni ink (MSMI) on D-galactose-induced aging mice. Aging (Albany NY) 2021; 13:11889-11906. [PMID: 33952720 PMCID: PMC8109126 DOI: 10.18632/aging.202890] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2020] [Accepted: 03/13/2021] [Indexed: 02/07/2023]
Abstract
Sepiella maindroni ink, a flavoring and coloring agent in food, has attracted considerable attention due to its various pharmacological activities. Our previous study showed that the melanin of Sepiella maindroni ink (MSMI) can alleviate oxidative damage and delay aging in D-galactose(D-gal)-induced aging mice. This study aimed to reveal the possible mechanisms of the anti-aging effect of MSMI. In this article, a comprehensive analysis of gas chromatography-mass spectrometry (GC-MS)-based metabolomics and microarray-based transcriptomics revealed that 221 mRNAs were differentially expressed and 46 metabolites were significantly changed in the anti-aging progress of MSMI. Integrated analysis of transcript and metabolic profiles indicated that MSMI mainly altered carbohydrate metabolism, lipid metabolism, and insulin signaling pathway. MSMI achieved anti-aging effects not only by reducing oxidative damage and sorbitol toxicity but also by regulating lipid metabolism, improving insulin sensitivity, and reducing the formation of advanced glycation end products (AGEs). Moreover, our findings firstly demonstrated that MSMI could increase the expression of interferon-induced proteins and might be a potential antiviral compound.
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Affiliation(s)
- Yueyue Zhou
- Key Laboratory of Applied Marine Biotechnology, Ministry of Education, Ningbo University, Ningbo 315211, China
| | - Weiwei Song
- Key Laboratory of Applied Marine Biotechnology, Ministry of Education, Ningbo University, Ningbo 315211, China.,Collaborative Innovation Center for Zhejiang Marine High-Efficiency and Healthy Aquaculture, Ningbo University, Ningbo 315211, China
| | - Chunlin Wang
- Key Laboratory of Applied Marine Biotechnology, Ministry of Education, Ningbo University, Ningbo 315211, China.,Collaborative Innovation Center for Zhejiang Marine High-Efficiency and Healthy Aquaculture, Ningbo University, Ningbo 315211, China
| | - Changkao Mu
- Key Laboratory of Applied Marine Biotechnology, Ministry of Education, Ningbo University, Ningbo 315211, China.,Collaborative Innovation Center for Zhejiang Marine High-Efficiency and Healthy Aquaculture, Ningbo University, Ningbo 315211, China
| | - Ronghua Li
- Key Laboratory of Applied Marine Biotechnology, Ministry of Education, Ningbo University, Ningbo 315211, China.,Collaborative Innovation Center for Zhejiang Marine High-Efficiency and Healthy Aquaculture, Ningbo University, Ningbo 315211, China
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21
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Proteomic Analysis of ISGylation in Immortalized Porcine Alveolar Macrophage Cell Lines Induced by Type I Interferon. Vaccines (Basel) 2021; 9:vaccines9020164. [PMID: 33671165 PMCID: PMC7922875 DOI: 10.3390/vaccines9020164] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2021] [Revised: 02/12/2021] [Accepted: 02/13/2021] [Indexed: 12/21/2022] Open
Abstract
Interferon-stimulated gene product 15 (ISG15), a ubiquitin-like molecule, can be conjugated to protein substrates through a reversible process known as ISGylation. ISG15 and ISGylation are both strongly upregulated by type I interferons and play putative key roles in host innate immunity against viral infection. However, the function of ISGylation and identities of ISGylation substrates are largely unknown. Here, a novel monoclonal antibody (Mab) that specifically recognizes porcine ISG15 (pISG15) was employed to capture ISG15-conjugated proteins from IFNs-stimulated porcine cell lysates. Next, Mab-captured conjugates were analyzed using proteomics-based tools to identify potential ISGylation protein targets in order to elucidate the roles of ISG15 and ISGylation in porcine cells. Subsequently, 190 putative ISGylation sites were detected within 98 identified ISGylation candidates; several candidates contained more than one ISGylation-modifiable lysine residue, including pISG15 itself. Motif enrichment analysis of confirmed ISGylation sites demonstrated a moderate bias towards certain sites with specific upstream amino acid residues. Meanwhile, results of Gene Ontology (GO)-based annotation and functional enrichment and protein-protein interaction (PPI) network analyses of porcine ISG15-conjugated substrate proteins indicated that these substrates were mainly associated with the host metabolism, especially nucleotide metabolic pathways that ultimately may participate in cellular antiviral defenses. Notably, several ISGs (MX1, IFIT1, OAS1, ISG15 and putative ISG15 E3 ligase Herc6) were also identified as putative ISGylation substrates within a regulatory loop involving ISGylation of ISGs themselves. Taken together, proteomics analysis of porcine ISGylation substrates revealed putative functional roles of ISG15 and novel host ISGylation targets that may ultimately be involved in cellular antiviral responses.
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22
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Zhang RL, Lo HH, Lei C, Ip N, Chen J, Law BYK. Current pharmacological intervention and development of targeting IVIG resistance in Kawasaki disease. Curr Opin Pharmacol 2020; 54:72-81. [PMID: 32956895 PMCID: PMC7500898 DOI: 10.1016/j.coph.2020.08.008] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2020] [Revised: 08/17/2020] [Accepted: 08/19/2020] [Indexed: 02/07/2023]
Abstract
Kawasaki disease is an acute childhood self-limited vasculitis, causing the swelling or inflammation of medium-sized arteries, eventually leading to cardiovascular problems such as coronary artery aneurysms. Acetylsalicylic acid combined with intravenous immunoglobulin (IVIG) is the standard treatment of Kawasaki disease (KD). However, a rising number of IVIG resistant cases were reported with severe disease complications such as the KD Shock Syndrome or KD-Macrophage activation syndrome. Recent reports have depicted the overlapped number of children with SARS-CoV-2 and KD, which was called multisystem inflammatory syndrome. Simultaneously, the incidence rate of KD-like diseases are increased after the outbreak of COVID-19, suggesting the virus may be associated with KD. New intervention is important to overcome the problem of IVIG treatment resistance. This review aims to introduce the current pharmacological intervention and possible resistance genes for the discovery of new drug for IVIG resistant KD.
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Affiliation(s)
- Rui Long Zhang
- State Key Laboratory of Quality Research in Chinese Medicine, Macau University of Science and Technology, Macao, SAR China
| | - Hang Hong Lo
- State Key Laboratory of Quality Research in Chinese Medicine, Macau University of Science and Technology, Macao, SAR China
| | - Cheng Lei
- Department of Pediatrics, Kiang Wu Hospital, Macao, SAR China
| | - Nikki Ip
- State Key Laboratory of Quality Research in Chinese Medicine, Macau University of Science and Technology, Macao, SAR China
| | - Juan Chen
- The Key Laboratory of Molecular Biology of Infectious Diseases Designated by the Chinese Ministry of Education, Institute for Viral Hepatitis, Department of Infectious Diseases, The Second Affiliated Hospital, Chongqing Medical University, Chongqing, China.
| | - Betty Yuen-Kwan Law
- State Key Laboratory of Quality Research in Chinese Medicine, Macau University of Science and Technology, Macao, SAR China.
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23
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ISGylation of Hepatitis C Virus NS5A Protein Promotes Viral RNA Replication via Recruitment of Cyclophilin A. J Virol 2020; 94:JVI.00532-20. [PMID: 32727878 DOI: 10.1128/jvi.00532-20] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2020] [Accepted: 07/24/2020] [Indexed: 12/14/2022] Open
Abstract
Interferon-stimulated gene 15 (ISG15) is a ubiquitin-like protein that is covalently conjugated to many substrate proteins in order to modulate their functions; this conjugation is called ISGylation. Several groups reported that the ISGylation of hepatitis C virus (HCV) NS5A protein affects HCV replication. However, the ISG15 conjugation sites on NS5A are not well determined, and it is unclear whether the role of NS5A ISGylation in HCV replication is proviral or antiviral. Here, we investigated the role of NS5A ISGylation in HCV replication by using HCV RNA replicons that encode a mutation at each lysine (Lys) residue of the NS5A protein. Immunoblot analyses revealed that 5 Lys residues (K44, K68, K166, K215, and K308) of the 14 Lys residues within NS5A (genotype 1b, Con1) have the potential to accept ISGylation. We tested the NS5A ISGylation among different HCV genotypes and observed that the NS5A proteins of all of the HCV genotypes accept ISGylation at multiple Lys residues. Using an HCV luciferase reporter replicon assay revealed that residue K308 of NS5A is important for HCV (1b, Con1) RNA replication. We observed that K308, one of the Lys residues for NS5A ISGylation, is located within the binding region of cyclophilin A (CypA), which is the critical host factor for HCV replication. We obtained evidence derived from all of the HCV genotypes suggesting that NS5A ISGylation enhances the interaction between NS5A and CypA. Taken together, these results suggest that NS5A ISGylation functions as a proviral factor and promotes HCV replication via the recruitment of CypA.IMPORTANCE Host cells have evolved host defense machinery (such as innate immunity) to eliminate viral infections. Viruses have evolved several counteracting strategies for achieving an immune escape from host defense machinery, including type I interferons (IFNs) and inflammatory cytokines. ISG15 is an IFN-inducible ubiquitin-like protein that is covalently conjugated to the viral protein via specific Lys residues and suppresses viral functions and viral propagation. Here, we demonstrate that HCV NS5A protein accepts ISG15 conjugation at specific Lys residues and that the HERC5 E3 ligase specifically promotes NS5A ISGylation. We obtained evidence suggesting that NS5A ISGylation facilitates the recruitment of CypA, which is the critical host factor for HCV replication, thereby promoting HCV replication. These findings indicate that E3 ligase HERC5 is a potential therapeutic target for HCV infection. We propose that HCV hijacks an intracellular ISG15 function to escape the host defense machinery in order to establish a persistent infection.
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24
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PRRSV Vaccine Strain-Induced Secretion of Extracellular ISG15 Stimulates Porcine Alveolar Macrophage Antiviral Response against PRRSV. Viruses 2020; 12:v12091009. [PMID: 32927637 PMCID: PMC7551094 DOI: 10.3390/v12091009] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2020] [Revised: 09/03/2020] [Accepted: 09/08/2020] [Indexed: 12/30/2022] Open
Abstract
Porcine reproductive and respiratory syndrome virus (PRRSV) has disrupted the global swine industry since the 1980s. PRRSV-host interactions are largely still unknown but may involve host ISG15 protein. In this study, we developed a monoclonal antibody (Mab-3D5E6) specific for swine ISG15 (sISG15) by immunizing mice with recombinant sISG15. A sandwich enzyme-linked immunosorbent assay (ELISA) incorporating this sISG15-specific Mab was developed to detect sISG15 and provided a lower limit of sISG15 detection of 200 pg/mL. ELISA results demonstrated that infection of porcine alveolar macrophages (PAMs) with low-virulence or attenuated PRRSV vaccine strains induced intracellular ISG15 expression that was independent of type I IFN production, while PAMs infection with a PRRSV vaccine strain promoted extracellular ISG15 secretion from infected PAMs. Conversely, the addition of recombinant sISG15 to PAMs mimicked natural extracellular ISG15 effects whereby sISG15 functioned as a cytokine by activating PAMs. Once activated, PAMs could inhibit PRRSV replication and resist infection with PRRSV vaccine strain TJM. In summary, a sandwich ELISA incorporating homemade anti-ISG15 Mab detected ISG15 secretion induced by PAMs infection with a PRRSV vaccine strain. Recombinant ISG15 added to cells exhibited cytokine-like activity that stimulated PAMs to assume an anti-viral state that enabled them to inhibit PRRSV replication and resist viral infection.
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25
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Held T, Basler M, Knobeloch KP, Groettrup M. Evidence for an involvement of the ubiquitin-like modifier ISG15 in MHC class I antigen presentation. Eur J Immunol 2020; 51:138-150. [PMID: 32686110 DOI: 10.1002/eji.202048646] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2020] [Revised: 06/16/2020] [Accepted: 07/14/2020] [Indexed: 12/16/2022]
Abstract
The IFN stimulated gene 15 (ISG15) encodes a 15-kDa ubiquitin-like protein, that is induced by type I IFNs and is conjugated to the bulk of newly synthesized polypeptides at the ribosome. ISG15 functions as an antiviral molecule possibly by being covalently conjugated to viral proteins and disturbing virus particle assembly. Here, we have investigated the effect of ISGylation on degradation and antigen presentation of viral and cellular proteins. ISGylation did not induce proteasomal degradation of bulk ISG15 target proteins neither after overexpressing ISG15 nor after induction by IFN-β. The MHC class I cell surface expression of splenocytes derived from ISG15-deficient mice or mice lacking the catalytic activity of the major de-ISGylating enzyme USP18 was unaltered as compared to WT mice. Fusion of ubiquitin or FAT10 to the long-lived nucleoprotein (NP) of lymphocytic choriomeningitis virus accelerated the proteasomal degradation of NP while fusion to ISG15 did not detectably speed up NP degradation. Nevertheless, MHC-I restricted presentation of two epitopes of NP were markedly enhanced when it was fused to ISG15 similarly to fusion with ubiquitin or FAT10. Thus, we provide evidence that ISG15 can enhance the presentation of antigens on MHC-I most likely by promoting co-translational antigen processing.
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Affiliation(s)
- Tobias Held
- Division of Immunology, Department of Biology, University of Konstanz, Konstanz, Germany
| | - Michael Basler
- Division of Immunology, Department of Biology, University of Konstanz, Konstanz, Germany.,Biotechnology Institute Thurgau at the University of Konstanz, Kreuzlingen, Switzerland
| | - Klaus-Peter Knobeloch
- Institute of Neuropathology, University of Freiburg, Medical faculty, Freiburg, Germany
| | - Marcus Groettrup
- Division of Immunology, Department of Biology, University of Konstanz, Konstanz, Germany.,Biotechnology Institute Thurgau at the University of Konstanz, Kreuzlingen, Switzerland
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26
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Masucci MG. Viral Ubiquitin and Ubiquitin-Like Deconjugases-Swiss Army Knives for Infection. Biomolecules 2020; 10:E1137. [PMID: 32752270 PMCID: PMC7464072 DOI: 10.3390/biom10081137] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2020] [Revised: 07/31/2020] [Accepted: 07/31/2020] [Indexed: 12/16/2022] Open
Abstract
Posttranslational modifications of cellular proteins by covalent conjugation of ubiquitin and ubiquitin-like polypeptides regulate numerous cellular processes that are captured by viruses to promote infection, replication, and spreading. The importance of these protein modifications for the viral life cycle is underscored by the discovery that many viruses encode deconjugases that reverse their functions. The structural and functional characterization of these viral enzymes and the identification of their viral and cellular substrates is providing valuable insights into the biology of viral infections and the host's antiviral defense. Given the growing body of evidence demonstrating their key contribution to pathogenesis, the viral deconjugases are now recognized as attractive targets for the design of novel antiviral therapeutics.
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Affiliation(s)
- Maria Grazia Masucci
- Department of Cell and Molecular Biology, Karolinska Institutet, S-17177 Stockholm, Sweden
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27
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Swaim CD, Canadeo LA, Monte KJ, Khanna S, Lenschow DJ, Huibregtse JM. Modulation of Extracellular ISG15 Signaling by Pathogens and Viral Effector Proteins. Cell Rep 2020; 31:107772. [PMID: 32553163 PMCID: PMC7297157 DOI: 10.1016/j.celrep.2020.107772] [Citation(s) in RCA: 52] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2020] [Revised: 04/28/2020] [Accepted: 05/22/2020] [Indexed: 12/29/2022] Open
Abstract
ISG15 is a ubiquitin-like modifier that also functions extracellularly, signaling through the LFA-1 integrin to promote interferon (IFN)-γ release from natural killer (NK) and T cells. The signals that lead to the production of extracellular ISG15 and the relationship between its two core functions remain unclear. We show that both epithelial cells and lymphocytes can secrete ISG15, which then signals in either an autocrine or paracrine manner to LFA-1-expressing cells. Microbial pathogens and Toll-like receptor (TLR) agonists result in both IFN-β-dependent and -independent secretion of ISG15, and residues required for ISG15 secretion are mapped. Intracellular ISGylation inhibits secretion, and viral effector proteins, influenza B NS1, and viral de-ISGylases, including SARS-CoV-2 PLpro, have opposing effects on secretion of ISG15. These results establish extracellular ISG15 as a cytokine-like protein that bridges early innate and IFN-γ-dependent immune responses, and indicate that pathogens have evolved to differentially inhibit the intracellular and extracellular functions of ISG15. ISG15 is released from multiple cell types to signal to LFA-1-expressing lymphocytes Mutational analysis separates ISG15 secretion from LFA-1 binding and ISGylation Intracellular conjugation of ISG15 negatively modulates its secretion Viral de-ISGylases, including SARS-CoV-2 PLpro, positively modulate ISG15 secretion
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Affiliation(s)
- Caleb D Swaim
- Department of Molecular Biosciences, University of Texas at Austin, Austin, TX 78712, USA
| | - Larissa A Canadeo
- Department of Molecular Biosciences, University of Texas at Austin, Austin, TX 78712, USA
| | - Kristen J Monte
- Departments of Internal Medicine and Pathology and Immunology, Washington University School of Medicine, St. Louis, MO 63110, USA
| | - Swati Khanna
- Department of Molecular Biosciences, University of Texas at Austin, Austin, TX 78712, USA
| | - Deborah J Lenschow
- Departments of Internal Medicine and Pathology and Immunology, Washington University School of Medicine, St. Louis, MO 63110, USA
| | - Jon M Huibregtse
- Department of Molecular Biosciences, University of Texas at Austin, Austin, TX 78712, USA.
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28
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Iglesias-Guimarais V, Ahrends T, de Vries E, Knobeloch KP, Volkov A, Borst J. IFN-Stimulated Gene 15 Is an Alarmin that Boosts the CTL Response via an Innate, NK Cell-Dependent Route. THE JOURNAL OF IMMUNOLOGY 2020; 204:2110-2121. [PMID: 32169846 DOI: 10.4049/jimmunol.1901410] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/10/2019] [Accepted: 02/01/2020] [Indexed: 12/26/2022]
Abstract
Type I IFN is produced upon infection and tissue damage and induces the expression of many IFN-stimulated genes (ISGs) that encode host-protective proteins. ISG15 is a ubiquitin-like molecule that can be conjugated to proteins but is also released from cells in a free form. Free, extracellular ISG15 is suggested to have an immune-regulatory role, based on disease phenotypes of ISG15-deficient humans and mice. However, the underlying mechanisms by which free ISG15 would act as a "cytokine" are unclear and much debated. We, in this study, demonstrate in a clinically relevant mouse model of therapeutic vaccination that free ISG15 is an alarmin that induces tissue alert, characterized by extracellular matrix remodeling, myeloid cell infiltration, and inflammation. Moreover, free ISG15 is a potent adjuvant for the CTL response. ISG15 produced at the vaccination site promoted the vaccine-specific CTL response by enhancing expansion, short-lived effector and effector/memory differentiation of CD8+ T cells. The function of free ISG15 as an extracellular ligand was demonstrated, because the equivalents in murine ISG15 of 2 aa recently implicated in binding of human ISG15 to LFA-1 in vitro were required for its adjuvant effect in vivo. Moreover, in further agreement with the in vitro findings on human cells, free ISG15 boosted the CTL response in vivo via NK cells in the absence of CD4+ T cell help. Thus, free ISG15 is part of a newly recognized innate route to promote the CTL response.
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Affiliation(s)
- Victoria Iglesias-Guimarais
- Division of Tumor Biology and Immunology, The Netherlands Cancer Institute, 1066 CX Amsterdam, the Netherlands
| | - Tomasz Ahrends
- Division of Tumor Biology and Immunology, The Netherlands Cancer Institute, 1066 CX Amsterdam, the Netherlands
| | - Evert de Vries
- Division of Tumor Biology and Immunology, The Netherlands Cancer Institute, 1066 CX Amsterdam, the Netherlands.,Department of Immunohematology and Blood Transfusion, Leiden University Medical School, 2333 ZA Leiden, the Netherlands.,Oncode Institute, Leiden University Medical School, 2333 ZA Leiden, the Netherlands; and
| | - Klaus-Peter Knobeloch
- Institute of Neuropathology, Faculty of Medicine, University of Freiburg, 79106 Freiburg, Germany
| | - Andriy Volkov
- Division of Tumor Biology and Immunology, The Netherlands Cancer Institute, 1066 CX Amsterdam, the Netherlands
| | - Jannie Borst
- Division of Tumor Biology and Immunology, The Netherlands Cancer Institute, 1066 CX Amsterdam, the Netherlands; .,Department of Immunohematology and Blood Transfusion, Leiden University Medical School, 2333 ZA Leiden, the Netherlands.,Oncode Institute, Leiden University Medical School, 2333 ZA Leiden, the Netherlands; and
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29
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Kespohl M, Bredow C, Klingel K, Voß M, Paeschke A, Zickler M, Poller W, Kaya Z, Eckstein J, Fechner H, Spranger J, Fähling M, Wirth EK, Radoshevich L, Thery F, Impens F, Berndt N, Knobeloch KP, Beling A. Protein modification with ISG15 blocks coxsackievirus pathology by antiviral and metabolic reprogramming. SCIENCE ADVANCES 2020; 6:eaay1109. [PMID: 32195343 PMCID: PMC7065878 DOI: 10.1126/sciadv.aay1109] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/21/2019] [Accepted: 12/13/2019] [Indexed: 05/10/2023]
Abstract
Protein modification with ISG15 (ISGylation) represents a major type I IFN-induced antimicrobial system. Common mechanisms of action and species-specific aspects of ISGylation, however, are still ill defined and controversial. We used a multiphasic coxsackievirus B3 (CV) infection model with a first wave resulting in hepatic injury of the liver, followed by a second wave culminating in cardiac damage. This study shows that ISGylation sets nonhematopoietic cells into a resistant state, being indispensable for CV control, which is accomplished by synergistic activity of ISG15 on antiviral IFIT1/3 proteins. Concurrent with altered energy demands, ISG15 also adapts liver metabolism during infection. Shotgun proteomics, in combination with metabolic network modeling, revealed that ISG15 increases the oxidative capacity and promotes gluconeogenesis in liver cells. Cells lacking the activity of the ISG15-specific protease USP18 exhibit increased resistance to clinically relevant CV strains, therefore suggesting that stabilizing ISGylation by inhibiting USP18 could be exploited for CV-associated human pathologies.
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Affiliation(s)
- Meike Kespohl
- Charité—Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health (BIH), Institute of Biochemistry, Berlin, Germany
- Deutsches Zentrum für Herz-Kreislauf-Forschung (DZHK), partner site Berlin, Germany
| | - Clara Bredow
- Charité—Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health (BIH), Institute of Biochemistry, Berlin, Germany
| | - Karin Klingel
- University of Tuebingen, Cardiopathology, Institute for Pathology and Neuropathology, Tuebingen, Germany
| | - Martin Voß
- Charité—Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health (BIH), Institute of Biochemistry, Berlin, Germany
| | - Anna Paeschke
- Charité—Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health (BIH), Institute of Biochemistry, Berlin, Germany
| | - Martin Zickler
- Charité—Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health (BIH), Institute of Biochemistry, Berlin, Germany
| | - Wolfgang Poller
- Charité—Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health (BIH), Clinic for Cardiology, Campus Benjamin Franklin, Berlin, Germany
| | - Ziya Kaya
- Universitätsklinikum Heidelberg, Medizinische Klinik für Innere Medizin III: Kardiologie, Angiologie und Pneumologie, Heidelberg, Germany
- Deutsches Zentrum für Herz-Kreislauf-Forschung (DZHK), partner site Heidelberg, Germany
| | - Johannes Eckstein
- Charité—Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health (BIH), Institute of Biochemistry, Berlin, Germany
| | - Henry Fechner
- Department of Applied Biochemistry, Institute of Biotechnology, Technische Universität Berlin, Berlin, Germany
| | - Joachim Spranger
- Charité—Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health (BIH), Department of Endocrinology, Diabetes and Nutrition, Berlin, Germany
| | - Michael Fähling
- Charité—Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health (BIH), Institute of Vegetative Physiology, Berlin, Germany
| | - Eva Katrin Wirth
- Charité—Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health (BIH), Department of Endocrinology, Diabetes and Nutrition, Berlin, Germany
| | - Lilliana Radoshevich
- Department of Microbiology and Immunology, University of Iowa, Iowa City, Iowa, USA
| | - Fabien Thery
- Department of Biomolecular Medicine, Ghent University, Ghent, Belgium
- VIB Center for Medical Biotechnology, Ghent, Belgium
| | - Francis Impens
- Department of Biomolecular Medicine, Ghent University, Ghent, Belgium
- VIB Center for Medical Biotechnology, Ghent, Belgium
- VIB Proteomics Core, Ghent, Belgium
| | - Nikolaus Berndt
- Charité—Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health (BIH), Institute of Biochemistry, Berlin, Germany
- Charité—Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health (BIH), Institute for Computational and Imaging Science in Cardiovascular Medicine, Berlin, Germany
| | | | - Antje Beling
- Charité—Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health (BIH), Institute of Biochemistry, Berlin, Germany
- Deutsches Zentrum für Herz-Kreislauf-Forschung (DZHK), partner site Berlin, Germany
- Corresponding author.
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Jiménez Fernández D, Hess S, Knobeloch KP. Strategies to Target ISG15 and USP18 Toward Therapeutic Applications. Front Chem 2020; 7:923. [PMID: 32039148 PMCID: PMC6985271 DOI: 10.3389/fchem.2019.00923] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2019] [Accepted: 12/18/2019] [Indexed: 12/21/2022] Open
Abstract
The interferon (IFN)-stimulated gene product 15 (ISG15) represents an ubiquitin-like protein (Ubl), which in a process termed ISGylation can be covalently linked to target substrates via a cascade of E1, E2, and E3 enzymes. Furthermore, ISG15 exerts functions in its free form both, as an intracellular and as a secreted protein. In agreement with its role as a type I IFN effector, most functions of ISG15 and ISGylation are linked to the anti-pathogenic response. However, also key roles in other cellular processes such as protein translation, cytoskeleton dynamics, exosome secretion, autophagy or genome stability and cancer were described. Ubiquitin-specific protease 18 (USP18) constitutes the major ISG15 specific protease which counteracts ISG15 conjugation. Remarkably, USP18 also functions as a critical negative regulator of the IFN response irrespective of its enzymatic activity. Concordantly, lack of USP18 function causes fatal interferonopathies in humans and mice. The negative regulatory function of USP18 in IFN signaling is regulated by various protein–protein interactions and its stability is controlled via proteasomal degradation. The broad repertoire of physiological functions and regulation of ISG15 and USP18 offers a variety of potential intervention strategies which might be of therapeutic use. Due to the high mutation rates of pathogens which are often species specific and constantly give rise to a variety of immune evasion mechanisms, immune effector systems are under constant evolutionarily pressure. Therefore, it is not surprising that considerable differences in ISG15 with respect to function and sequence exist even among closely related species. Hence, it is essential to thoroughly evaluate the translational potential of results obtained in model organisms especially for therapeutic strategies. This review covers existing and conceptual assay systems to target and identify modulators of ISG15, ISGylation, USP18 function, and protein–protein interactions within this context. Strategies comprise mouse models for translational perspectives, cell-based and biochemical assays as well as chemical probes.
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Affiliation(s)
| | - Sandra Hess
- Faculty of Medicine, Institute of Neuropathology, University of Freiburg, Freiburg, Germany.,Faculty of Biology, University of Freiburg, Freiburg, Germany
| | - Klaus-Peter Knobeloch
- Faculty of Medicine, Institute of Neuropathology, University of Freiburg, Freiburg, Germany
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Zhang J, Zhang Y, Li Z, Wu H, Xun J, Feng H. Bioinformatics analysis of Ewing's sarcoma: Seeking key candidate genes and pathways. Oncol Lett 2019; 18:6008-6016. [PMID: 31788075 PMCID: PMC6865160 DOI: 10.3892/ol.2019.10936] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2018] [Accepted: 08/13/2019] [Indexed: 12/22/2022] Open
Abstract
Ewing's sarcoma (ES) is the second most common bone tumor among children and adolescents worldwide. However, the genes and signaling pathways involved in ES tumorigenesis and progression remain unclear. The present study used two gene-expression profile datasets (GSE17674 and GSE31215) to elucidate key potential candidate genes and pathways in ES. Differentially expressed genes (DEGs) were identified and a functional enrichment analysis was performed. A protein-protein interaction (PPI) network was constructed, and the most significant module in the PPI network was selected from the Search Tool for the Retrieval of Interacting Genes/Proteins database. A total of 278 genes were identified by comparing the tumor samples with non-cancerous samples; these included 272 upregulated and 6 downregulated genes. The pathway analysis demonstrated significant enrichment in the positive regulation of transcription in the DEGs coding for RNA polymerase II promoter, plasma membrane and chromatin binding pathways in cancer in general. There were 269 nodes and 292 edges in the PPI network. Finally, MYC, IGF1, OAS1, EZH2 and ISG15 were identified as the hub genes according to the degree levels. The survival analysis revealed that EZH2 is associated with a poor prognosis in patients with ES. In conclusion, the DEGs, associated pathways and hub genes identified in the present study help elucidate the underlying molecular mechanisms of ES carcinogenesis and progression, and provide potential molecular targets and biomarkers for ES.
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Affiliation(s)
- Jinming Zhang
- Department of Orthopedics, Hebei Medical University Fourth Affiliated Hospital and Hebei Provincial Tumor Hospital, Shijiazhuang, Hebei 050011, P.R. China
| | - Yao Zhang
- Department of Breast Cancer Center, Hebei Medical University Fourth Affiliated Hospital and Hebei Provincial Tumor Hospital, Shijiazhuang, Hebei 050011, P.R. China
| | - Ze Li
- Department of Emergency, Hebei Medical University Second Affiliated Hospital, Shijiazhuang, Hebei 050000, P.R. China
| | - Hongzeng Wu
- Department of Orthopedics, Hebei Medical University Fourth Affiliated Hospital and Hebei Provincial Tumor Hospital, Shijiazhuang, Hebei 050011, P.R. China
| | - Jianjun Xun
- Department of Orthopedics, Hebei Medical University Fourth Affiliated Hospital and Hebei Provincial Tumor Hospital, Shijiazhuang, Hebei 050011, P.R. China
| | - Helin Feng
- Department of Orthopedics, Hebei Medical University Fourth Affiliated Hospital and Hebei Provincial Tumor Hospital, Shijiazhuang, Hebei 050011, P.R. China
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Zhang Y, Thery F, Wu NC, Luhmann EK, Dussurget O, Foecke M, Bredow C, Jiménez-Fernández D, Leandro K, Beling A, Knobeloch KP, Impens F, Cossart P, Radoshevich L. The in vivo ISGylome links ISG15 to metabolic pathways and autophagy upon Listeria monocytogenes infection. Nat Commun 2019; 10:5383. [PMID: 31772204 PMCID: PMC6879477 DOI: 10.1038/s41467-019-13393-x] [Citation(s) in RCA: 46] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2019] [Accepted: 11/07/2019] [Indexed: 12/28/2022] Open
Abstract
ISG15 is an interferon-stimulated, ubiquitin-like protein, with anti-viral and anti-bacterial activity. Here, we map the endogenous in vivo ISGylome in the liver following Listeria monocytogenes infection by combining murine models of reduced or enhanced ISGylation with quantitative proteomics. Our method identifies 930 ISG15 sites in 434 proteins and also detects changes in the host ubiquitylome. The ISGylated targets are enriched in proteins which alter cellular metabolic processes, including upstream modulators of the catabolic and antibacterial pathway of autophagy. Computational analysis of substrate structures reveals that a number of ISG15 modifications occur at catalytic sites or dimerization interfaces of enzymes. Finally, we demonstrate that animals and cells with enhanced ISGylation have increased basal and infection-induced autophagy through the modification of mTOR, WIPI2, AMBRA1, and RAB7. Taken together, these findings ascribe a role of ISGylation to temporally reprogram organismal metabolism following infection through direct modification of a subset of enzymes in the liver.
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Affiliation(s)
- Yifeng Zhang
- Department of Microbiology and Immunology, University of Iowa Carver College of Medicine, Iowa City, IA, 52242, USA
| | - Fabien Thery
- Center for Medical Biotechnology, VIB, 9000, Gent, Belgium
- Department for Biomolecular Medicine, Gent University, 9000, Gent, Belgium
| | - Nicholas C Wu
- Department of Integrative Structural and Computational Biology, The Scripps Research Institute, La Jolla, CA, 92037, USA
| | - Emma K Luhmann
- Department of Microbiology and Immunology, University of Iowa Carver College of Medicine, Iowa City, IA, 52242, USA
| | - Olivier Dussurget
- Institut Pasteur, Unité des Interactions Bactéries-Cellules, Département de Biologie Cellulaire et Infection, 75015, Paris, France
- Inserm, U604, 75015, Paris, France
- National Institute for Agronomic Research (INRA), Unité sous-contrat 2020, 75015, Paris, France
| | - Mariko Foecke
- Institut Pasteur, Unité des Interactions Bactéries-Cellules, Département de Biologie Cellulaire et Infection, 75015, Paris, France
- Inserm, U604, 75015, Paris, France
- National Institute for Agronomic Research (INRA), Unité sous-contrat 2020, 75015, Paris, France
| | - Clara Bredow
- Charité-Universitäts medizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health (BIH), Institute of Biochemistry, Berlin, Germany
| | | | - Kevin Leandro
- Center for Medical Biotechnology, VIB, 9000, Gent, Belgium
- Department for Biomolecular Medicine, Gent University, 9000, Gent, Belgium
| | - Antje Beling
- Charité-Universitäts medizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health (BIH), Institute of Biochemistry, Berlin, Germany
- Deutsches Zentrum für Herz-Kreislauf-Forschung (DZHK), Partner Site Berlin, Berlin, Germany
| | - Klaus-Peter Knobeloch
- Institute of Neuropathology, Medical Faculty, University of Freiburg, Freiburg, Germany
| | - Francis Impens
- Center for Medical Biotechnology, VIB, 9000, Gent, Belgium.
- Department for Biomolecular Medicine, Gent University, 9000, Gent, Belgium.
- VIB Proteomics Core, VIB, 9000, Gent, Belgium.
| | - Pascale Cossart
- Institut Pasteur, Unité des Interactions Bactéries-Cellules, Département de Biologie Cellulaire et Infection, 75015, Paris, France.
- Inserm, U604, 75015, Paris, France.
- National Institute for Agronomic Research (INRA), Unité sous-contrat 2020, 75015, Paris, France.
| | - Lilliana Radoshevich
- Department of Microbiology and Immunology, University of Iowa Carver College of Medicine, Iowa City, IA, 52242, USA.
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Shen B, Wei K, Guo S, Liu C, Zhang J. Molecular characterization and expression analyses of two homologues of interferon-stimulated gene ISG15 in Larimichthys crocea (Family: Sciaenidae). FISH & SHELLFISH IMMUNOLOGY 2019; 86:846-857. [PMID: 30576775 DOI: 10.1016/j.fsi.2018.12.018] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/04/2018] [Revised: 12/10/2018] [Accepted: 12/11/2018] [Indexed: 06/09/2023]
Abstract
In this study, we sequenced and characterized two homologues of interferon-stimulated gene ISG15, termed as LcISG15-1 and LcISG15-2, from the large yellow croaker (Larimichthys crocea). The LcISG15-1 encodes 159 amino acids and the LcISG15-2 encodes 155 amino acids, both of which contain two tandem ubiquitin-like domains and the conserved C-terminal LRGG conjugation motif. The sequence analyses showed that both the LcISG15-1 and LcISG15-2 exhibit high similarity with ISG15 from other fishes. A putative IFN-stimulatory response element (ISRE) was detected in promoter regions of both the LcISG15-1 and LcISG15-2. Phylogenetic analyses revealed a close evolutionary relationship of both the LcISG15-1 and LcISG15-2 with other teleostean ISG15. Molecular evolutionary analyses suggested a gene duplication event of ISG15 in the ancestor of the Sciaenidae, with a signature of positive selection was found in the ISG15-2 gene copy of sciaenid fishes. The Real-time PCR analyses showed that the LcISG15-1 and LcISG15-2 were both found to be ubiquitously expressed in ten examined organs in large yellow croaker, with predominant expressions both in peripheral blood. Expression analyses showed that both the LcISG15-1 and LcISG15-2 were rapidly and significantly upregulated in vivo after poly (I:C) challenge in liver and spleen organs. However, the LcISG15-1 and LcISG15-2 were both significantly induced after pathogen Vibrio parahemolyticus infection only in the liver but not in the spleen. These results indicated that there are two ISG15 homologues in the large yellow croaker, both of which are likely to be involved in host immune defense against viral and bacterial infection.
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Affiliation(s)
- Bin Shen
- National Engineering Research Center of Marine Facilities Aquaculture, College of Marine Science, Zhejiang Ocean University, Zhoushan, 316004, China.
| | - Ke Wei
- National Engineering Research Center of Marine Facilities Aquaculture, College of Marine Science, Zhejiang Ocean University, Zhoushan, 316004, China
| | - Shaoyu Guo
- National Engineering Research Center of Marine Facilities Aquaculture, College of Marine Science, Zhejiang Ocean University, Zhoushan, 316004, China
| | - Cheng Liu
- National Engineering Research Center of Marine Facilities Aquaculture, College of Marine Science, Zhejiang Ocean University, Zhoushan, 316004, China
| | - Jianshe Zhang
- National Engineering Research Center of Marine Facilities Aquaculture, College of Marine Science, Zhejiang Ocean University, Zhoushan, 316004, China.
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Napolitano A, van der Veen AG, Bunyan M, Borg A, Frith D, Howell S, Kjaer S, Beling A, Snijders AP, Knobeloch KP, Frickel EM. Cysteine-Reactive Free ISG15 Generates IL-1β-Producing CD8α + Dendritic Cells at the Site of Infection. THE JOURNAL OF IMMUNOLOGY 2018; 201:604-614. [PMID: 29891555 PMCID: PMC6036233 DOI: 10.4049/jimmunol.1701322] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/26/2017] [Accepted: 05/11/2018] [Indexed: 02/04/2023]
Abstract
IFN-stimulated gene (ISG) 15 is a ubiquitin-like protein induced after type I IFN stimulation. There is a dearth of in vivo models to study free unconjugated ISG15 function. We found that free ISG15 enhances the production of IFN-γ and IL-1β during murine infection with Toxoplasma gondii. In our model, ISG15 is induced in a type I IFN–dependent fashion and released into the serum. Increased ISG15 levels are dependent on an actively invading and replicating parasite. Two cysteine residues in the hinge domain are necessary determinants for ISG15 to induce increased cytokine levels during infection. Increased ISG15 is concurrent with an influx of IL-1β–producing CD8α+ dendritic cells to the site of infection. In this article, we present Toxoplasma infection as a novel in vivo murine model to study the immunomodulatory properties of free ISG15 and uniquely link it to IL-1β production by CD8α+ dendritic cells driven by two cysteines in the hinge region of the protein.
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Affiliation(s)
- Anna Napolitano
- Host-Toxoplasma Interaction Laboratory, The Francis Crick Institute, London NW1 1AT, United Kingdom
| | | | - Monique Bunyan
- Host-Toxoplasma Interaction Laboratory, The Francis Crick Institute, London NW1 1AT, United Kingdom
| | - Annabel Borg
- Structural Biology, The Francis Crick Institute, London NW1 1AT, United Kingdom
| | - David Frith
- Protein Analysis and Proteomics Laboratory, The Francis Crick Institute, London NW1 1AT, United Kingdom
| | - Steven Howell
- Protein Analysis and Proteomics Laboratory, The Francis Crick Institute, London NW1 1AT, United Kingdom
| | - Svend Kjaer
- Structural Biology, The Francis Crick Institute, London NW1 1AT, United Kingdom
| | - Antje Beling
- Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health (BIH), Institute of Biochemistry, 10117 Berlin, Germany; and
| | - Ambrosius P Snijders
- Protein Analysis and Proteomics Laboratory, The Francis Crick Institute, London NW1 1AT, United Kingdom
| | | | - Eva-Maria Frickel
- Host-Toxoplasma Interaction Laboratory, The Francis Crick Institute, London NW1 1AT, United Kingdom;
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Luo XY, Liu Q, Yang H, Tan Q, Gan LQ, Ren FL, Wang H. OSMR gene effect on the pathogenesis of chronic autoimmune Urticaria via the JAK/STAT3 pathway. Mol Med 2018; 24:28. [PMID: 30134804 PMCID: PMC6016876 DOI: 10.1186/s10020-018-0025-6] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2018] [Accepted: 05/06/2018] [Indexed: 11/18/2022] Open
Abstract
Background Chronic autoimmune urticaria (CAU) is a common skin disease and remains unclear understanding of pathogenesis in the vast majority of cases. In order to explore a new therapy for CAU, the current study was performed to investigate the possible functioning of the Oncostatin M receptor (OSMR) gene in the autoimmunity of CAU via regulation of the JAK/STAT3 signaling pathway. Methods CAU skin tissues from 24 CAU patients and normal skin tissues from normal subjects were collected. Hematoxylin-eosin (HE) staining was conducted to count eosinophils, and immunohistochemistry was carried out to detect the positive rate of OSMR expression in two kinds of skin tissues. A total of 72 Kunming (KM) mice were selected, and 60 mice were used for establishing CAU models and later transfected with different plasmids. The expression of inflammatory factors was evaluated by enzyme-linked immunosorbent assays (ELISA). Expressions of janus kinase (JAK), signal transducer and activator of transcription 3 (STAT3), interferon-stimulated gene 15 (ISG15), CT10-regulated kinase (CRK), and interferon regulatory factor 9 (IRF9) were identified using Western blot assay and reverse transcription quantitative polymerase chain reaction (RT-qPCR). Epithelial cell proliferation was assessed by 3-[4,5-dimethylthiazol-2-yl]-2,5-diphenyl tetrazolium bromide (MTT) assay, and cell cycle distribution and cell apoptosis were assessed using flow cytometry. Results The findings confirm that OSMR protein expression and histamine release rate are highly elevated in human CAU skin tissues, and the expression of the JAK/STAT3 signaling pathway-related genes (OSMR, JAK2, STAT3, ISG15, CRK and IRF9) was up-regulated. OSMR gene silencing in CAU mice significantly decreases the content of inflammatory factors (IL-1, IL-6, IFN-γ, and IgE), the number of eosinophils, and reduces the expression of the JAK/STAT3 signaling pathway related genes, and further enhances cell proliferation, promotes cell cycle entry and inhibits apoptosis of epithelial cells. Conclusion All aforementioned results indicate that OSMR gene silencing inhibits the activation of the JAK/STAT3 signaling pathway, thereby suppressing the development of CAU.
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Affiliation(s)
- Xiao-Yan Luo
- Department of Dermatology, Children's Hospital of Chongqing Medical University, Chongqing, 400014, China.,Ministry of Education Key Laboratory of Child Development and Disorders, Chongqing, 400014, China
| | - Qun Liu
- The Division of Allergy and Clinical Immunology, Johns Hopkins University School of Medicine, Baltimore, MD, 21224, USA
| | - Huan Yang
- Department of Dermatology, Children's Hospital of Chongqing Medical University, Chongqing, 400014, China.,China International Science and Technology Cooperation Base of Child Development and Critical Disorders, Chongqing, 400014, China
| | - Qi Tan
- Department of Dermatology, Children's Hospital of Chongqing Medical University, Chongqing, 400014, China.,Chongqing Key Laboratory of Pediatrics, No.136, Zhongshan Er Road, Yuzhong District, Chongqing, 400014, China
| | - Li-Qiang Gan
- Department of Dermatology, Children's Hospital of Chongqing Medical University, Chongqing, 400014, China.,Chongqing Key Laboratory of Pediatrics, No.136, Zhongshan Er Road, Yuzhong District, Chongqing, 400014, China
| | - Fa-Liang Ren
- Department of Dermatology, Children's Hospital of Chongqing Medical University, Chongqing, 400014, China
| | - Hua Wang
- Department of Dermatology, Children's Hospital of Chongqing Medical University, Chongqing, 400014, China. .,Ministry of Education Key Laboratory of Child Development and Disorders, Chongqing, 400014, China. .,China International Science and Technology Cooperation Base of Child Development and Critical Disorders, Chongqing, 400014, China. .,Chongqing Key Laboratory of Pediatrics, No.136, Zhongshan Er Road, Yuzhong District, Chongqing, 400014, China.
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Desai S, Juncker M, Kim C. Regulation of mitophagy by the ubiquitin pathway in neurodegenerative diseases. Exp Biol Med (Maywood) 2018; 243:554-562. [PMID: 29316798 DOI: 10.1177/1535370217752351] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
Mitophagy is a cellular process by which dysfunctional mitochondria are degraded via autophagy. Increasing empirical evidence proposes that this mitochondrial quality-control mechanism is defective in neurons of patients with various neurodegenerative diseases such as Ataxia Telangiectasia, Alzheimer's disease, Parkinson's disease, and Amyotrophic Lateral Sclerosis. Accumulation of defective mitochondria and the production of reactive oxygen species due to defective mitophagy have been identified as causes underlying neurodegenerative disease pathogenesis. However, the reason mitophagy is defective in most neurodegenerative diseases is unclear. Like mitophagy, defects in the ubiquitin/26S proteasome pathway have been linked to neurodegeneration, resulting in the characteristic protein aggregates often seen in neurons of affected patients. Although initiation of mitophagy requires a functional ubiquitin pathway, whether defects in the ubiquitin pathway are causally responsible for defective mitophagy is not known. In this mini-review, we introduce mitophagy and ubiquitin pathways and provide a summary of our current understanding of the regulation of mitophagy by the ubiquitin pathway. We will then briefly review empirical evidence supporting mitophagy defects in neurodegenerative diseases. The review will conclude with a discussion of the constitutively elevated expression of ubiquitin-like protein Interferon-Stimulated Gene 15 (ISG15), an antagonist of the ubiquitin pathway, as a potential cause of defective mitophagy in neurodegenerative diseases. Impact statement Neurodegenerative diseases place an enormous burden on patients and caregivers globally. Over six million people in the United States alone suffer from neurodegenerative diseases, all of which are chronic, incurable, and with causes unknown. Identifying a common molecular mechanism underpinning neurodegenerative disease pathology is urgently needed to aid in the design of effective therapies to ease suffering, reduce economic cost, and improve the quality of life for these patients. Although the development of neurodegeneration may vary between neurodegenerative diseases, they have common cellular hallmarks, including defects in the ubiquitin-proteasome system and mitophagy. In this review, we will provide a summary of our current understanding of the regulation of mitophagy by the ubiquitin pathway and discuss the potential of targeting mitophagy and ubiquitin pathways for the treatment of neurodegeneration.
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Affiliation(s)
- Shyamal Desai
- Department of Biochemistry and Molecular Biology, LSUHSC-School of Medicine, New Orleans, LA 70112, USA
| | - Meredith Juncker
- Department of Biochemistry and Molecular Biology, LSUHSC-School of Medicine, New Orleans, LA 70112, USA
| | - Catherine Kim
- Department of Biochemistry and Molecular Biology, LSUHSC-School of Medicine, New Orleans, LA 70112, USA
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Baldanta S, Fernández-Escobar M, Acín-Perez R, Albert M, Camafeita E, Jorge I, Vázquez J, Enríquez JA, Guerra S. ISG15 governs mitochondrial function in macrophages following vaccinia virus infection. PLoS Pathog 2017; 13:e1006651. [PMID: 29077752 PMCID: PMC5659798 DOI: 10.1371/journal.ppat.1006651] [Citation(s) in RCA: 56] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2017] [Accepted: 09/17/2017] [Indexed: 12/17/2022] Open
Abstract
The interferon (IFN)-stimulated gene 15 (ISG15) encodes one of the most abundant proteins induced by interferon, and its expression is associated with antiviral immunity. To identify protein components implicated in IFN and ISG15 signaling, we compared the proteomes of ISG15-/- and ISG15+/+ bone marrow derived macrophages (BMDM) after vaccinia virus (VACV) infection. The results of this analysis revealed that mitochondrial dysfunction and oxidative phosphorylation (OXPHOS) were pathways altered in ISG15-/- BMDM treated with IFN. Mitochondrial respiration, Adenosine triphosphate (ATP) and reactive oxygen species (ROS) production was higher in ISG15+/+ BMDM than in ISG15-/- BMDM following IFN treatment, indicating the involvement of ISG15-dependent mechanisms. An additional consequence of ISG15 depletion was a significant change in macrophage polarization. Although infected ISG15-/- macrophages showed a robust proinflammatory cytokine expression pattern typical of an M1 phenotype, a clear blockade of nitric oxide (NO) production and arginase-1 activation was detected. Accordingly, following IFN treatment, NO release was higher in ISG15+/+ macrophages than in ISG15-/- macrophages concomitant with a decrease in viral titer. Thus, ISG15-/- macrophages were permissive for VACV replication following IFN treatment. In conclusion, our results demonstrate that ISG15 governs the dynamic functionality of mitochondria, specifically, OXPHOS and mitophagy, broadening its physiological role as an antiviral agent. Protein modification by ubiquitin and ubiquitin-like proteins is a key regulatory process of the innate and adaptive immune response. Interferon-stimulated gene 15 product (ISG15) is an ubiquitin-like protein modifier that can reversibly attach to different viral and cellular proteins, mediating potent antiviral responses. In turn, many viruses, including poxviruses, have evolved strategies to antagonize the antiviral and inflammatory effects of the innate immune response in order to keep infected cells alive until virus replication is complete. Here, we describe a novel role for ISG15 in the control of mitochondrial function. Post-translational modifications such as ISGylation regulate essential mitochondrial processes including respiration and mitophagy, and influence macrophage innate immunity signaling. These findings are clinically relevant since mitochondrial dysfunction is seen in many pathologies, such as infectious disease, cancer, and cardiovascular or neurological disorders, among others, underscoring the importance of the relationship between cellular metabolism and immune response.
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Affiliation(s)
- Sara Baldanta
- Department of Preventive Medicine, Public Health and Microbiology, Universidad Autónoma, Madrid, Spain
| | | | - Rebeca Acín-Perez
- Functional Genetics of the Oxidative Phosphorylation System, Centro Nacional de Investigaciones Cardiovasculares Carlos III; Madrid (SPAIN)
| | - Manuel Albert
- Department of Preventive Medicine, Public Health and Microbiology, Universidad Autónoma, Madrid, Spain
| | - Emilio Camafeita
- Laboratory of Cardiovascular Proteomics, Centro Nacional Investigaciones Cardiovasculares Carlos III (CNIC), Madrid (SPAIN)
- Laboratory of Cardiovascular Proteomics, Centro Nacional de Investigaciones Cardiovasculares Carlos III (CNIC) and CIBER de Enfermedades Cardiovasculares (CIBER-CV), Madrid (SPAIN)
| | - Inmaculada Jorge
- Laboratory of Cardiovascular Proteomics, Centro Nacional Investigaciones Cardiovasculares Carlos III (CNIC), Madrid (SPAIN)
- Laboratory of Cardiovascular Proteomics, Centro Nacional de Investigaciones Cardiovasculares Carlos III (CNIC) and CIBER de Enfermedades Cardiovasculares (CIBER-CV), Madrid (SPAIN)
| | - Jesús Vázquez
- Laboratory of Cardiovascular Proteomics, Centro Nacional Investigaciones Cardiovasculares Carlos III (CNIC), Madrid (SPAIN)
- Laboratory of Cardiovascular Proteomics, Centro Nacional de Investigaciones Cardiovasculares Carlos III (CNIC) and CIBER de Enfermedades Cardiovasculares (CIBER-CV), Madrid (SPAIN)
| | - José Antonio Enríquez
- Functional Genetics of the Oxidative Phosphorylation System, Centro Nacional de Investigaciones Cardiovasculares Carlos III; Madrid (SPAIN)
| | - Susana Guerra
- Department of Preventive Medicine, Public Health and Microbiology, Universidad Autónoma, Madrid, Spain
- * E-mail:
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Zhao P, Jiang T, Zhong Z, Zhao L, Yang S, Xia X. Inhibition of rabies virus replication by interferon-stimulated gene 15 and its activating enzyme UBA7. INFECTION GENETICS AND EVOLUTION 2017; 56:44-53. [PMID: 29056542 DOI: 10.1016/j.meegid.2017.10.016] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/13/2017] [Accepted: 10/19/2017] [Indexed: 01/27/2023]
Abstract
It was reported that ISG15 and its activating enzyme UBA7 have antiviral functions. However, there is no study to demonstrate whether ISG15 and UBA7 have anti-rabies virus function. In the current study, In vivo and in vitro anti-rabies virus function of ISG15 and UBA7 were investigated using RNAi technology. The results showed that shRNA knock-down of expression of ISG15 and UBA7 increased the titers of RABV in neuroblastoma cell line NA and microglial cell line BV-2 cells and shRNA knockdown of ISG15 conjugation alleviates the IFN-induced inhibition of RABV gene expression in vitro. Lentiviral vector mediated-shRNA knock-down of expression of ISG15 and UBA7 increased the titers of RABV in mouse brains and decreased the survivorship of mice. The study showed that ISG15 and UBA7 inhibit RABV replication in vitro and in vivo. To our knowledge, we for the first time documented the anti-RABV function of ISG15 and UBA7, which may provide a means of understanding the pathogenesis of rabies and improving therapeutic methods.
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Affiliation(s)
- Pingsen Zhao
- Clinical Core Laboratory, Meizhou People's Hospital (Huangtang Hospital), Meizhou Hospital Affiliated to Sun Yat-sen University, Meizhou 514031, PR China; Center for Precision Medicine, Meizhou People's Hospital (Huangtang Hospital), Meizhou Hospital Affiliated to Sun Yat-sen University, Meizhou 514031, PR China.
| | - Tianqi Jiang
- College of Veterinary Medicine, Northeast Agricultural University, Harbin 150030, China
| | - Zhixiong Zhong
- Center for Precision Medicine, Meizhou People's Hospital (Huangtang Hospital), Meizhou Hospital Affiliated to Sun Yat-sen University, Meizhou 514031, PR China
| | - Lili Zhao
- Institute of Military Veterinary, Academy of Military Medical Sciences, Changchun 130122, China
| | - Songtao Yang
- Institute of Military Veterinary, Academy of Military Medical Sciences, Changchun 130122, China
| | - Xianzhu Xia
- Institute of Military Veterinary, Academy of Military Medical Sciences, Changchun 130122, China
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39
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Villarroya-Beltri C, Guerra S, Sánchez-Madrid F. ISGylation - a key to lock the cell gates for preventing the spread of threats. J Cell Sci 2017; 130:2961-2969. [PMID: 28842471 DOI: 10.1242/jcs.205468] [Citation(s) in RCA: 96] [Impact Index Per Article: 13.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023] Open
Abstract
Interferon stimulated gene 15 (ISG15) is an ubiquitin-like protein whose expression and conjugation to targets (ISGylation) is induced by infection, interferon (IFN)-α and -β, ischemia, DNA damage and aging. Attention has historically focused on the antiviral effects of ISGylation, which blocks the entry, replication or release of different intracellular pathogens. However, recently, new functions of ISGylation have emerged that implicate it in multiple cellular processes, such as DNA repair, autophagy, protein translation and exosome secretion. In this Review, we discuss the induction and conjugation of ISG15, as well as the functions of ISGylation in the prevention of infections and in cancer progression. We also offer a novel perspective with regard to the latest findings on this pathway, with special attention to the role of ISGylation in the inhibition of exosome secretion, which is mediated by fusion of multivesicular bodies with lysosomes. Finally, we propose that under conditions of stress or infection, ISGylation acts as a defense mechanism to inhibit normal protein translation by modifying protein kinase R (PKR, also known as EIF2AK2), while any newly synthesized proteins are being tagged and thus marked as potentially dangerous. Then, the endosomal system is re-directed towards protein degradation at the lysosome, to effectively 'lock' the cell gates and thus prevent the spread of pathogens, prions and deleterious aggregates through exosomes.
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Affiliation(s)
- Carolina Villarroya-Beltri
- Vascular Pathophysiology Area, Centro Nacional de Investigaciones Cardiovasculares (CNIC), 28029 Madrid, Spain.,Immunology Service, Hospital de la Princesa, Universidad Autónoma de Madrid, 28006 Madrid, Spain.,CIBER de Enfermedades Cardiovasculares, Instituto de Salud Carlos III, 28029 Madrid, Spain
| | - Susana Guerra
- Preventive Medicine Department, Facultad de Medicina, Universidad Autónoma de Madrid, 28029 Madrid, Spain
| | - Francisco Sánchez-Madrid
- Vascular Pathophysiology Area, Centro Nacional de Investigaciones Cardiovasculares (CNIC), 28029 Madrid, Spain .,Immunology Service, Hospital de la Princesa, Universidad Autónoma de Madrid, 28006 Madrid, Spain.,CIBER de Enfermedades Cardiovasculares, Instituto de Salud Carlos III, 28029 Madrid, Spain
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40
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Wang Z, Zhu WG, Xu X. Ubiquitin-like modifications in the DNA damage response. Mutat Res 2017; 803-805:56-75. [PMID: 28734548 DOI: 10.1016/j.mrfmmm.2017.07.001] [Citation(s) in RCA: 37] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2017] [Revised: 06/03/2017] [Accepted: 07/03/2017] [Indexed: 12/14/2022]
Abstract
Genomic DNA is damaged at an extremely high frequency by both endogenous and environmental factors. An improper response to DNA damage can lead to genome instability, accelerate the aging process and ultimately cause various human diseases, including cancers and neurodegenerative disorders. The mechanisms that underlie the cellular DNA damage response (DDR) are complex and are regulated at many levels, including at the level of post-translational modification (PTM). Since the discovery of ubiquitin in 1975 and ubiquitylation as a form of PTM in the early 1980s, a number of ubiquitin-like modifiers (UBLs) have been identified, including small ubiquitin-like modifiers (SUMOs), neural precursor cell expressed, developmentally down-regulated 8 (NEDD8), interferon-stimulated gene 15 (ISG15), human leukocyte antigen (HLA)-F adjacent transcript 10 (FAT10), ubiquitin-fold modifier 1 (UFRM1), URM1 ubiquitin-related modifier-1 (URM1), autophagy-related protein 12 (ATG12), autophagy-related protein 8 (ATG8), fan ubiquitin-like protein 1 (FUB1) and histone mono-ubiquitylation 1 (HUB1). All of these modifiers have known roles in the cellular response to various forms of stress, and delineating their underlying molecular mechanisms and functions is fundamental in enhancing our understanding of human disease and longevity. To date, however, the molecular mechanisms and functions of these UBLs in the DDR remain largely unknown. This review summarizes the current status of PTMs by UBLs in the DDR and their implication in cancer diagnosis, therapy and drug discovery.
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Affiliation(s)
- Zhifeng Wang
- Guangdong Key Laboratory of Genome Stability & Disease Prevention, Shenzhen University School of Medicine, Shenzhen, Guangdong 518060, China
| | - Wei-Guo Zhu
- Guangdong Key Laboratory of Genome Stability & Disease Prevention, Shenzhen University School of Medicine, Shenzhen, Guangdong 518060, China
| | - Xingzhi Xu
- Guangdong Key Laboratory of Genome Stability & Disease Prevention, Shenzhen University School of Medicine, Shenzhen, Guangdong 518060, China; Beijing Key Laboratory of DNA Damage Response, Capital Normal University College of Life Sciences, Beijing 100048, China.
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41
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Basters A, Geurink PP, Röcker A, Witting KF, Tadayon R, Hess S, Semrau MS, Storici P, Ovaa H, Knobeloch KP, Fritz G. Structural basis of the specificity of USP18 toward ISG15. Nat Struct Mol Biol 2017; 24:270-278. [PMID: 28165509 PMCID: PMC5405867 DOI: 10.1038/nsmb.3371] [Citation(s) in RCA: 67] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2016] [Accepted: 01/05/2017] [Indexed: 02/03/2023]
Abstract
Protein modification by ubiquitin and ubiquitin-like modifiers (Ubls) is counteracted by ubiquitin proteases and Ubl proteases, collectively termed DUBs. In contrast to other proteases of the ubiquitin-specific protease (USP) family, USP18 shows no reactivity toward ubiquitin but specifically deconjugates the interferon-induced Ubl ISG15. To identify the molecular determinants of this specificity, we solved the crystal structures of mouse USP18 alone and in complex with mouse ISG15. USP18 was crystallized in an open and a closed conformation, thus revealing high flexibility of the enzyme. Structural data, biochemical and mutational analysis showed that only the C-terminal ubiquitin-like domain of ISG15 is recognized and essential for USP18 activity. A critical hydrophobic patch in USP18 interacts with a hydrophobic region unique to ISG15, thus providing evidence that USP18's ISG15 specificity is mediated by a small interaction interface. Our results may provide a structural basis for the development of new drugs modulating ISG15 linkage.
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Affiliation(s)
- Anja Basters
- Institute of Neuropathology, Faculty of Medicine, University of Freiburg, Freiburg, Germany, Breisacherstraße 64, 79106 Freiburg, Germany
| | - Paul P Geurink
- Department of Chemical Immunology, Leiden University Medical Center, Albinusdreef 2, 2333 ZA, Leiden, Netherlands
| | - Annika Röcker
- Institute of Neuropathology, Faculty of Medicine, University of Freiburg, Freiburg, Germany, Breisacherstraße 64, 79106 Freiburg, Germany
| | - Katharina F Witting
- Department of Chemical Immunology, Leiden University Medical Center, Albinusdreef 2, 2333 ZA, Leiden, Netherlands
| | - Roya Tadayon
- Institute of Neuropathology, Faculty of Medicine, University of Freiburg, Freiburg, Germany, Breisacherstraße 64, 79106 Freiburg, Germany.,Hermann-Staudinger-Graduate school, University of Freiburg, Hebelstrasse 27, 79104 Freiburg, Germany
| | - Sandra Hess
- Institute of Neuropathology, Faculty of Medicine, University of Freiburg, Freiburg, Germany, Breisacherstraße 64, 79106 Freiburg, Germany
| | - Marta S Semrau
- Structural Biology Laboratory, Elettra Sincrotrone Trieste S.C.p.A., SS 14 - km 163,5 in AREA Science Park, 34149 Trieste, Italy
| | - Paola Storici
- Structural Biology Laboratory, Elettra Sincrotrone Trieste S.C.p.A., SS 14 - km 163,5 in AREA Science Park, 34149 Trieste, Italy
| | - Huib Ovaa
- Department of Chemical Immunology, Leiden University Medical Center, Albinusdreef 2, 2333 ZA, Leiden, Netherlands
| | - Klaus-Peter Knobeloch
- Institute of Neuropathology, Faculty of Medicine, University of Freiburg, Freiburg, Germany, Breisacherstraße 64, 79106 Freiburg, Germany
| | - Günter Fritz
- Institute of Neuropathology, Faculty of Medicine, University of Freiburg, Freiburg, Germany, Breisacherstraße 64, 79106 Freiburg, Germany
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42
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Hermann M, Bogunovic D. ISG15: In Sickness and in Health. Trends Immunol 2017; 38:79-93. [PMID: 27887993 DOI: 10.1016/j.it.2016.11.001] [Citation(s) in RCA: 76] [Impact Index Per Article: 10.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2016] [Revised: 10/31/2016] [Accepted: 11/01/2016] [Indexed: 12/11/2022]
Abstract
ISG15 is a type I interferon (IFN)-inducible gene encoding a protein with pleiotropic functions, acting both as a soluble molecule and as a protein modifier. Surprisingly, and despite the antiviral functions of ISG15 described in mice, humans born with inactivating mutations of ISG15 do not present with any overt viral phenotype, but are highly susceptible to environmental mycobacteria and have autoinflammatory disease presentations. In vitro, ISG15 deficiency also leads to persistently high levels of type I IFN-stimulated gene expression and to increased resistance to all viruses tested to date. This suggests that ISG15 deficiency increases antiviral responses in humans, in stark contrast to expectations based on mouse experiments. We discuss here the roles of each of the forms of ISG15 in health and disease, as well as the differences between species.
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Affiliation(s)
- Mark Hermann
- Department of Microbiology, Icahn School of Medicine at Mount Sinai, NY, NY 10029, USA
| | - Dusan Bogunovic
- Department of Microbiology, Icahn School of Medicine at Mount Sinai, NY, NY 10029, USA; Department of Pediatrics, Icahn School of Medicine at Mount Sinai, NY, NY 10029, USA; The Mindich Child Health and Development Institute, Icahn School of Medicine at Mount Sinai, NY, NY 10029, USA.
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43
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Comparative and temporal transcriptome analysis of peste des petits ruminants virus infected goat peripheral blood mononuclear cells. Virus Res 2017; 229:28-40. [DOI: 10.1016/j.virusres.2016.12.014] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2016] [Revised: 12/20/2016] [Accepted: 12/20/2016] [Indexed: 11/22/2022]
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44
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Kimmey JM, Campbell JA, Weiss LA, Monte KJ, Lenschow DJ, Stallings CL. The impact of ISGylation during Mycobacterium tuberculosis infection in mice. Microbes Infect 2017; 19:249-258. [PMID: 28087453 DOI: 10.1016/j.micinf.2016.12.006] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2016] [Revised: 12/13/2016] [Accepted: 12/24/2016] [Indexed: 12/20/2022]
Abstract
Mycobacterium tuberculosis infection results in 1.5 million deaths annually. Type I interferon (IFN) signaling through its receptor IFNAR correlates with increased severity of disease, although how this increases susceptibility to M. tuberculosis remains uncertain. ISG15 is one of the most highly induced interferon stimulated genes (ISGs) during M. tuberculosis infection. ISG15 functions by conjugation to target proteins (ISGylation), by noncovalent association with intracellular proteins, and by release from the cell. Recent studies indicated that ISG15 can function via conjugation-independent mechanisms to suppress the type I IFN response. These data raised the question of whether ISG15 may have diverse and sometimes opposing functions during M. tuberculosis infection. To address this, we analyzed ISGylation during M. tuberculosis infection and show that ISGylated proteins accumulate following infection in an IFNAR-dependent manner. Type I IFN and ISG15 both play transient roles in promoting bacterial replication. However, as the disease progresses, ISGylation deviates from the overall effect of type I IFN and, ultimately, mice deficient in ISGylation are significantly more susceptible than IFNAR mice. Our data demonstrate that ISGs can both protect against and promote disease and are the first to report a role for ISGylation during M. tuberculosis infection.
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Affiliation(s)
- Jacqueline M Kimmey
- Department of Molecular Microbiology, Washington University School of Medicine, St Louis, MO, USA
| | - Jessica A Campbell
- Department of Internal Medicine, Washington University School of Medicine, St. Louis, MO, USA
| | - Leslie A Weiss
- Department of Molecular Microbiology, Washington University School of Medicine, St Louis, MO, USA
| | - Kristen J Monte
- Department of Internal Medicine, Washington University School of Medicine, St. Louis, MO, USA
| | - Deborah J Lenschow
- Department of Internal Medicine, Washington University School of Medicine, St. Louis, MO, USA; Department of Pathology and Immunology, Washington University School of Medicine, St. Louis, MO, USA
| | - Christina L Stallings
- Department of Molecular Microbiology, Washington University School of Medicine, St Louis, MO, USA.
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45
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Villarroya-Beltri C, Baixauli F, Mittelbrunn M, Fernández-Delgado I, Torralba D, Moreno-Gonzalo O, Baldanta S, Enrich C, Guerra S, Sánchez-Madrid F. ISGylation controls exosome secretion by promoting lysosomal degradation of MVB proteins. Nat Commun 2016; 7:13588. [PMID: 27882925 PMCID: PMC5123068 DOI: 10.1038/ncomms13588] [Citation(s) in RCA: 305] [Impact Index Per Article: 38.1] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2015] [Accepted: 10/18/2016] [Indexed: 12/30/2022] Open
Abstract
Exosomes are vesicles secreted to the extracellular environment through fusion with the plasma membrane of specific endosomes called multivesicular bodies (MVB) and mediate cell-to-cell communication in many biological processes. Posttranslational modifications are involved in the sorting of specific proteins into exosomes. Here we identify ISGylation as a ubiquitin-like modification that controls exosome release. ISGylation induction decreases MVB numbers and impairs exosome secretion. Using ISG15-knockout mice and mice expressing the enzymatically inactive form of the de-ISGylase USP18, we demonstrate in vitro and in vivo that ISG15 conjugation regulates exosome secretion. ISG15 conjugation triggers MVB co-localization with lysosomes and promotes the aggregation and degradation of MVB proteins. Accordingly, inhibition of lysosomal function or autophagy restores exosome secretion. Specifically, ISGylation of the MVB protein TSG101 induces its aggregation and degradation, being sufficient to impair exosome secretion. These results identify ISGylation as a novel ubiquitin-like modifier in the control of exosome production. Multivesicular bodies (MVB) are endosomal compartments that can either fuse with the plasma membrane for the secretion of exosomes, or fuse with the lysosome and be degraded along with their contents. Here, the authors show that ISGylation of the MVB protein TSG101 impairs exosome secretion and acts as a regulator of MVB fate.
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Affiliation(s)
- Carolina Villarroya-Beltri
- Centro Nacional de Investigaciones Cardiovasculares (CNIC), 28029 Madrid, Spain.,Immunology Service, Hospital de la Princesa, Instituto Investigación Sanitaria Princesa, Universidad Autónoma de Madrid, 28006 Madrid, Spain
| | - Francesc Baixauli
- Centro Nacional de Investigaciones Cardiovasculares (CNIC), 28029 Madrid, Spain.,Immunology Service, Hospital de la Princesa, Instituto Investigación Sanitaria Princesa, Universidad Autónoma de Madrid, 28006 Madrid, Spain
| | - María Mittelbrunn
- Centro Nacional de Investigaciones Cardiovasculares (CNIC), 28029 Madrid, Spain
| | - Irene Fernández-Delgado
- Centro Nacional de Investigaciones Cardiovasculares (CNIC), 28029 Madrid, Spain.,Immunology Service, Hospital de la Princesa, Instituto Investigación Sanitaria Princesa, Universidad Autónoma de Madrid, 28006 Madrid, Spain
| | - Daniel Torralba
- Centro Nacional de Investigaciones Cardiovasculares (CNIC), 28029 Madrid, Spain.,Immunology Service, Hospital de la Princesa, Instituto Investigación Sanitaria Princesa, Universidad Autónoma de Madrid, 28006 Madrid, Spain
| | - Olga Moreno-Gonzalo
- Centro Nacional de Investigaciones Cardiovasculares (CNIC), 28029 Madrid, Spain.,Immunology Service, Hospital de la Princesa, Instituto Investigación Sanitaria Princesa, Universidad Autónoma de Madrid, 28006 Madrid, Spain
| | - Sara Baldanta
- Department of Preventive Medicine, Public Health and Microbiology, Universidad Autónoma de Madrid, 28029 Madrid, Spain
| | - Carlos Enrich
- Departament de Biomedicina, Unitat de Biologia Cel·lular, Centre de Recerca Biomèdica CELLEX, Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), Facultat de Medicina, Universitat de Barcelona, 08036 Barcelona, Spain
| | - Susana Guerra
- Department of Preventive Medicine, Public Health and Microbiology, Universidad Autónoma de Madrid, 28029 Madrid, Spain
| | - Francisco Sánchez-Madrid
- Centro Nacional de Investigaciones Cardiovasculares (CNIC), 28029 Madrid, Spain.,Immunology Service, Hospital de la Princesa, Instituto Investigación Sanitaria Princesa, Universidad Autónoma de Madrid, 28006 Madrid, Spain
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46
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Honke N, Shaabani N, Zhang DE, Hardt C, Lang KS. Multiple functions of USP18. Cell Death Dis 2016; 7:e2444. [PMID: 27809302 PMCID: PMC5260889 DOI: 10.1038/cddis.2016.326] [Citation(s) in RCA: 100] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2016] [Revised: 09/12/2016] [Accepted: 09/16/2016] [Indexed: 12/12/2022]
Abstract
Since the discovery of the ubiquitin system and the description of its important role in the degradation of proteins, many studies have shown the importance of ubiquitin-specific peptidases (USPs). One special member of this family is the USP18 protein (formerly UBP43). In the past two decades, several functions of USP18 have been discovered: this protein is not only an isopeptidase but also a potent inhibitor of interferon signaling. Therefore, USP18 functions as 'a' maestro of many biological pathways in various cell types. This review outlines multiple functions of USP18 in the regulation of various immunological processes, including pathogen control, cancer development, and autoimmune diseases.
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Affiliation(s)
- Nadine Honke
- Institute of Immunology, Medical Faculty, University of Duisburg-Essen, Hufelandstr. 55, Essen 45147, Germany
| | - Namir Shaabani
- Institute of Immunology, Medical Faculty, University of Duisburg-Essen, Hufelandstr. 55, Essen 45147, Germany.,Department of Immunology and Microbial Science, The Scripps Research Institute, La Jolla, CA 92037, USA
| | - Dong-Er Zhang
- Moores UCSD Cancer Center, University of California San Diego, La Jolla, CA 92093, USA
| | - Cornelia Hardt
- Institute of Immunology, Medical Faculty, University of Duisburg-Essen, Hufelandstr. 55, Essen 45147, Germany
| | - Karl S Lang
- Institute of Immunology, Medical Faculty, University of Duisburg-Essen, Hufelandstr. 55, Essen 45147, Germany
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47
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ISG15 deficiency and increased viral resistance in humans but not mice. Nat Commun 2016; 7:11496. [PMID: 27193971 PMCID: PMC4873964 DOI: 10.1038/ncomms11496] [Citation(s) in RCA: 122] [Impact Index Per Article: 15.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2015] [Accepted: 04/04/2016] [Indexed: 12/28/2022] Open
Abstract
ISG15 is an interferon (IFN)-α/β-induced ubiquitin-like protein. It exists as a free molecule, intracellularly and extracellularly, and conjugated to target proteins. Studies in mice have demonstrated a role for Isg15 in antiviral immunity. By contrast, human ISG15 was shown to have critical immune functions, but not in antiviral immunity. Namely, free extracellular ISG15 is crucial in IFN-γ-dependent antimycobacterial immunity, while free intracellular ISG15 is crucial for USP18-mediated downregulation of IFN-α/β signalling. Here we describe ISG15-deficient patients who display no enhanced susceptibility to viruses in vivo, in stark contrast to Isg15-deficient mice. Furthermore, fibroblasts derived from ISG15-deficient patients display enhanced antiviral protection, and expression of ISG15 attenuates viral resistance to WT control levels. The species-specific gain-of-function in antiviral immunity observed in ISG15 deficiency is explained by the requirement of ISG15 to sustain USP18 levels in humans, a mechanism not operating in mice. ISG15 is a ubiquitin-like protein which has important immune-related functions in mice and humans. Here the authors demonstrate that, unlike in mice, human ISG15 stabilizes UPS18 and that ISG15-deficient human cells are more resistant to viral infection.
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48
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Lazear HM, Govero J, Smith AM, Platt DJ, Fernandez E, Miner JJ, Diamond MS. A Mouse Model of Zika Virus Pathogenesis. Cell Host Microbe 2016; 19:720-30. [PMID: 27066744 PMCID: PMC4866885 DOI: 10.1016/j.chom.2016.03.010] [Citation(s) in RCA: 707] [Impact Index Per Article: 88.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2016] [Revised: 03/28/2016] [Accepted: 03/28/2016] [Indexed: 12/11/2022]
Abstract
The ongoing Zika virus (ZIKV) epidemic and unexpected clinical outcomes, including Guillain-Barré syndrome and birth defects, has brought an urgent need for animal models. We evaluated infection and pathogenesis with contemporary and historical ZIKV strains in immunocompetent mice and mice lacking components of the antiviral response. Four- to six-week-old Irf3(-/-)Irf5(-/-)Irf7(-/-) triple knockout mice, which produce little interferon α/β, and mice lacking the interferon receptor (Ifnar1(-/-)) developed neurological disease and succumbed to ZIKV infection, whereas single Irf3(-/-), Irf5(-/-), and Mavs(-/-) knockout mice exhibited no overt illness. Ifnar1(-/-) mice sustained high viral loads in the brain and spinal cord, consistent with evidence that ZIKV causes neurodevelopmental defects in human fetuses. The testes of Ifnar1(-/-) mice had the highest viral loads, which is relevant to sexual transmission of ZIKV. This model of ZIKV pathogenesis will be valuable for evaluating vaccines and therapeutics as well as understanding disease pathogenesis.
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Affiliation(s)
- Helen M Lazear
- Department of Microbiology and Immunology, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA
| | - Jennifer Govero
- Department of Medicine, Washington University School of Medicine, St. Louis, MO 63110, USA
| | - Amber M Smith
- Department of Medicine, Washington University School of Medicine, St. Louis, MO 63110, USA
| | - Derek J Platt
- Department of Medicine, Washington University School of Medicine, St. Louis, MO 63110, USA
| | - Estefania Fernandez
- Department of Medicine, Washington University School of Medicine, St. Louis, MO 63110, USA
| | - Jonathan J Miner
- Department of Medicine, Washington University School of Medicine, St. Louis, MO 63110, USA
| | - Michael S Diamond
- Department of Medicine, Washington University School of Medicine, St. Louis, MO 63110, USA; Department of Molecular Microbiology, Washington University School of Medicine, St. Louis, MO 63110, USA; Department of Pathology & Immunology, Washington University School of Medicine, St. Louis, MO 63110, USA; The Center for Human Immunology and Immunotherapy Programs, Washington University School of Medicine, St. Louis, MO 63110, USA.
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49
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Imaizumi T, Shimada T, Matsumiya T, Yoshida H, Watanabe S, Tsuruga K, Kawaguchi S, Murakami M, Joh K, Tanaka H. Interferon-Stimulated Gene 15, a Type I Interferon-Dependent Transcript, Is Involved in a Negative Feedback Loop in Innate Immune Reactions in Human Mesangial Cells. Nephron Clin Pract 2016; 132:144-52. [PMID: 26844778 DOI: 10.1159/000443934] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2015] [Accepted: 01/04/2016] [Indexed: 11/19/2022] Open
Abstract
BACKGROUND Since innate immunity plays a pivotal role in the pathogenesis of glomerulonephritis, the activation of toll-like receptor (TLR) 3/type I interferon (IFN) cascades is important in glomerular inflammation. However, the role of IFN-stimulated gene 15 (ISG15), a type IFN-dependent transcript, in glomerular inflammation is unclear. We, therefore, examined the role of ISG15 in innate immune reactions induced by TLR3 signaling in cultured human mesangial cells (MCs). METHODS We treated MCs with polyinosinic-polycytidylic acid (poly IC), an authentic double-stranded RNA, and analyzed the ISG15 expression by reverse transcription-polymerase chain reaction and western blotting. To examine the regulation of ISG15 expression, we subjected MCs to RNA interference (siRNA) against TLR3, IFN-β, ISG56, and melanoma differentiation-associated gene 5 (MDA5). RESULTS ISG15 expression induced by poly IC in MCs was inhibited by siRNA against TLR3 and IFN-β, whereas silencing of ISG56 or MDA5 had no effect. A knockdown of ISG15 upregulated the expression of ISG56, MDA5, CXCL10 and phosphorylated signal transducers and activators of transcription protein 1 (P-STAT1), while a knockdown of ubiquitin-like modifier activating enzyme 7, a key enzyme that conjugates ISG15 to target proteins, did not affect the expression. Knockdown of ubiquitin specific protease 18, an ISG15 isopeptidase, also upregulated P-STAT1, ISG56, MDA5 and CXCL10. CONCLUSION Since unconjugated free ISG15 negatively regulates the phosphorylation of STAT1 and its downstream reactions, ISG15 dysregulation may be involved in the pathogenesis of glomerular inflammation. We believe that suitable interventions in these innate immune cascades is desirable for the future therapeutic strategies for glomerulonephritis.
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Affiliation(s)
- Tadaatsu Imaizumi
- Department of Vascular Biology, Hirosaki University Graduate School of Medicine, Hirosaki University, Hirosaki, Japan
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Burks J, Reed RE, Desai SD. Free ISG15 triggers an antitumor immune response against breast cancer: a new perspective. Oncotarget 2016; 6:7221-31. [PMID: 25749047 PMCID: PMC4466680 DOI: 10.18632/oncotarget.3372] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2015] [Accepted: 01/13/2015] [Indexed: 12/20/2022] Open
Abstract
Interferon-Stimulated Gene 15 (ISG15), an antagonist of the canonical ubiquitin pathway, is frequently overexpressed in various cancers. In cancer cells, ISG15 is detected as free (intracellular) and conjugated to cellular proteins (ISGylation). Free ISG15 is also secreted into the extracellular milieu. ISGylation has protumor functions and extracellular free ISG15 has immunomodulatory properties in vitro. Therefore, whether ISG15 is a tumor suppressor or tumor promoter in vivo remains controversial. The current study aimed to clarify the role of free ISG15 in tumorigenesis. Breast cancer cells stably expressing control, ISG15, and UbcH8 (ISG15-specific E2 ligase) shRNAs were used to assess the immunoregulatory and antitumor function of free ISG15 in cell culture (in vitro) and in nude mice (in vivo). We show that extracellular free ISG15 suppresses breast tumor growth and increases NK cell infiltration into xenografted breast tumors in nude mice, and intracellular free ISG15 enhances major histocompatibility complex (MHC) class I surface expression in breast cancer cells. We conclude that free ISG15 may have antitumor and immunoregulatory function in vivo. These findings provides the basis for developing strategies to increase systemic levels of free ISG15 to treat cancer patients overexpressing the ISG15 pathway.
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Affiliation(s)
- Julian Burks
- Department of Biochemistry & Molecular Biology, LSU Health Sciences Center-School of Medicine, New Orleans, LA, USA.,Present Address: Georgetown University Medical Center, Lombardi Comprehensive Cancer Center Department of Molecular Oncology, Washington, DC, USA
| | - Ryan E Reed
- Department of Biochemistry & Molecular Biology, LSU Health Sciences Center-School of Medicine, New Orleans, LA, USA
| | - Shyamal D Desai
- Department of Biochemistry & Molecular Biology, LSU Health Sciences Center-School of Medicine, New Orleans, LA, USA
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