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Umashankar B, Eliasson L, Ooi CY, Kim KW, Shaw JAM, Waters SA. Beyond insulin: Unraveling the complex interplay of ER stress, oxidative damage, and CFTR modulation in CFRD. J Cyst Fibros 2024:S1569-1993(24)00082-1. [PMID: 38897882 DOI: 10.1016/j.jcf.2024.06.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2024] [Revised: 05/10/2024] [Accepted: 06/04/2024] [Indexed: 06/21/2024]
Abstract
CF-related diabetes (CFRD) is a prevalent comorbidity in people with Cystic Fibrosis (CF), significantly impacting morbidity and mortality rates. This review article critically evaluates the current understanding of CFRD molecular mechanisms, including the role of CFTR protein, oxidative stress, unfolded protein response (UPR) and intracellular communication. CFRD manifests from a complex interplay between exocrine pancreatic damage and intrinsic endocrine dysfunction, further complicated by the deleterious effects of misfolded CFTR protein on insulin secretion and action. Studies indicate that ER stress and subsequent UPR activation play critical roles in both exocrine and endocrine pancreatic cell dysfunction, contributing to β-cell loss and insulin insufficiency. Additionally, oxidative stress and altered calcium flux, exacerbated by CFTR dysfunction, impair β-cell survival and function, highlighting the significance of antioxidant pathways in CFRD pathogenesis. Emerging evidence underscores the importance of exosomal microRNAs (miRNAs) in mediating inflammatory and stress responses, offering novel insights into CFRD's molecular landscape. Despite insulin therapy remaining the cornerstone of CFRD management, the variability in response to CFTR modulators underscores the need for personalized treatment approaches. The review advocates for further research into non-CFTR therapeutic targets, emphasizing the need to address the multifaceted pathophysiology of CFRD. Understanding the intricate mechanisms underlying CFRD will pave the way for innovative treatments, moving beyond insulin therapy to target the disease's root causes and improve the quality of life for individuals with CF.
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Affiliation(s)
- Bala Umashankar
- School of Biomedical Sciences, Faculty of Medicine and Health, University of New South Wales, Sydney, NSW, Australia; Molecular and Integrative Cystic Fibrosis Research Centre, University of New South Wales, Sydney, NSW, Australia; School of Clinical Medicine, Faculty of Medicine and Health, University of New South Wales, Sydney, NSW, Australia
| | - Lena Eliasson
- Department of Clinical Sciences, Unit of Islet Cell Exocytosis, Lund University Diabetes Centre, Scania University Hospital, Malmö, Scania, Sweden
| | - Chee Y Ooi
- Molecular and Integrative Cystic Fibrosis Research Centre, University of New South Wales, Sydney, NSW, Australia; School of Clinical Medicine, Faculty of Medicine and Health, University of New South Wales, Sydney, NSW, Australia; Department of Gastroenterology, Sydney Children's Hospital Randwick, NSW, Australia
| | - Ki Wook Kim
- School of Clinical Medicine, Faculty of Medicine and Health, University of New South Wales, Sydney, NSW, Australia; Virology and Serology Division (SaViD), New South Wales Health Pathology, Prince of Wales Hospital, Randwick, NSW, Australia
| | - James A M Shaw
- Translational and Clinical Research Institute, Newcastle University, Newcastle upon Tyne, United Kingdom
| | - Shafagh A Waters
- School of Biomedical Sciences, Faculty of Medicine and Health, University of New South Wales, Sydney, NSW, Australia; Molecular and Integrative Cystic Fibrosis Research Centre, University of New South Wales, Sydney, NSW, Australia; School of Clinical Medicine, Faculty of Medicine and Health, University of New South Wales, Sydney, NSW, Australia.
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2
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Sahoo M, Singh R, Kumar P, Kumar Mariappan A, Munnuswamy P, Singh K, Mani S, Dhama K, Kondabattula G, Das T, Thakor JC, Kashyap G, Sahoo NR. Novel pathologic findings and viral antigen distribution in cattle and buffalo calves naturally infected with Foot-and-Mouth disease virus. Vet Q 2023; 43:1-13. [PMID: 37733477 PMCID: PMC10548843 DOI: 10.1080/01652176.2023.2260435] [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: 01/05/2023] [Accepted: 09/11/2023] [Indexed: 09/23/2023] Open
Abstract
The Foot-and-Mouth disease is highly contagious acute viral disease of livestock inflicting huge economic loss to the farmers. The limited knowledge regarding the pathological lesions vis-a-vis distribution of the FMDV in lesser explored endocrine glands and important vital organs other than the target organs of infected calves prompted us to take the present investigation to have detailed insight into the pathogenesis. The systematic necropsy of 37 dead calves (cattle-28 and buffalo-9) was conducted, and thin representative tissue pieces from the affected organs were collected in 10% neutral buffered formalin (NBF) for pathological and immunohistochemical investigations. The genomic detection and its serotyping were done by RT-PCR and multiplex-PCR, respectively. Necropsy examination in all cases showed myocardial lesions resembling 'tigroid heart appearance'. Other organ specific lesions include vesiculo-ulcerative stomatitis, edema of the lungs, petechial hemorrhages, edema of the endocrines, and gastroenteritis. Histopathological examination showed varying sizes of vesicles and ulcerations in stratified squamous epithelium of the tongue, acute necrotizing myocarditis, lymphoid depletion in lymphoid tissues, hepatitis, pancreatitis, thymic hyperplasia, thyroiditis, adrenitis, and enteritis. Positive immunolabeling for viral antigens was observed in endocrine glands, lymphoid organs, lungs, liver, kidneys, and intestine, in addition to other typical locations. The thyroid, adrenal glands, and pancreas, in addition to the tongue and heart, are the tissue of choice for sampling in the field during epidemics. Further, the viral genome and serotype A was confirmed in the affected tissues. This study provides insights into novel tissue tropism and pathogenesis in young calves naturally infected with FMDV.
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Affiliation(s)
- Monalisa Sahoo
- ICAR-National Institute on Foot-and-Mouth Disease (NIFMD), Bhubaneswar, India
- Division of Pathology, ICAR- Indian veterinary Research Institute (IVRI), Izatnagar, India
| | - Rajendra Singh
- Veterinary Pathology, Institute of Veterinary Science and Animal Husbandry, Siksha "O" Anusandhan, Bhubaneswar, India
| | - Pawan Kumar
- Division of Pathology, ICAR- Indian veterinary Research Institute (IVRI), Izatnagar, India
| | - Asok Kumar Mariappan
- Division of Pathology, ICAR- Indian veterinary Research Institute (IVRI), Izatnagar, India
| | - Palanivelu Munnuswamy
- Division of Pathology, ICAR- Indian veterinary Research Institute (IVRI), Izatnagar, India
| | - Karampal Singh
- CADRAD, ICAR- Indian Veterinary Research Institute (IVRI), Izatnagar, India
| | - Saminathan Mani
- CADRAD, ICAR- Indian Veterinary Research Institute (IVRI), Izatnagar, India
| | - Kuldeep Dhama
- Veterinary Pathology, Institute of Veterinary Science and Animal Husbandry, Siksha "O" Anusandhan, Bhubaneswar, India
| | - Ganesh Kondabattula
- Quality control & Quality Assurance unit, ICAR-Indian Veterinary Research Institute (IVRI), Hebbal, India
| | - Tareni Das
- ICAR-National Institute on Foot-and-Mouth Disease (NIFMD), Bhubaneswar, India
| | | | - Gayatri Kashyap
- Division of Pathology, ICAR- Indian veterinary Research Institute (IVRI), Izatnagar, India
| | - Nihar Ranjan Sahoo
- ICAR-National Institute on Foot-and-Mouth Disease (NIFMD), Bhubaneswar, India
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3
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Fu Y, Zi R, Xiong S. Infection by exosome-carried Coxsackievirus B3 induces immune escape resulting in an aggravated pathogenesis. Microbes Infect 2023; 25:105148. [PMID: 37156458 DOI: 10.1016/j.micinf.2023.105148] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2023] [Revised: 05/02/2023] [Accepted: 05/03/2023] [Indexed: 05/10/2023]
Abstract
Increasing evidence has shown that extracellular vesicles or exosomes released from virus-infected cells contain viral particles, genomes, or other pathogenic factors that move to neighbor cells, contributing to virus dissemination and productive infection. Our recent study demonstrated that exosomes carrying CVB3 virions exhibited greater infection efficiency than free virions because they accessed various entry routes, overcoming restrictions to viral tropism. However, the pathogenicity of exosomes carried CVB3 and their effect on immunological properties have not yet been completely explained. In the current study, we sought to explore whether exosomes exert their effect on the CVB3-induced pathogenesis or evade the immune attack. Our results showed that exosomes-carried CVB3 could effectively infect viral receptor-negative immune cells in vivo, resulting in inducing immune system loss. Importantly, the exosomes-carried CVB3 had the ability to escape the neutralizing antibodies activity resulting in inducing the severe onset of myocarditis. Using the genetically engineered mouse with deficiency of exosomes, we observed that the exosomes-carried CVB3 reinforced an aggravated pathogenesis. By understanding how exosomes promote the course of viral disease, clinical applications of exosomes can be developed.
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Affiliation(s)
- Yuxuan Fu
- Jiangsu Key Laboratory of Infection and Immunity, Institutes of Biology and Medical Sciences, Soochow University, Suzhou 215123, China
| | - Ruidong Zi
- Jiangsu Key Laboratory of Infection and Immunity, Institutes of Biology and Medical Sciences, Soochow University, Suzhou 215123, China
| | - Sidong Xiong
- Jiangsu Key Laboratory of Infection and Immunity, Institutes of Biology and Medical Sciences, Soochow University, Suzhou 215123, China.
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Ramamoorthy S, Garg S, Mishra B, Radotra BD, Saikia UN. Coxsackievirus and Adenovirus Receptor (CAR) Expression in Autopsy Tissues: Organ-Specific Patterns and Clinical Significance. Cureus 2023; 15:e37138. [PMID: 37153286 PMCID: PMC10159945 DOI: 10.7759/cureus.37138] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/02/2023] [Indexed: 05/09/2023] Open
Abstract
Coxsackievirus and adenovirus receptor (CAR) homologs have been identified in many species, and their proteins appeared to be highly conserved in evolution. While most of the human studies are about pathological conditions, the animal studies were more about the physiological and developmental functions of receptors. The expression of CAR is developmentally regulated, and its tissue localization is complex. Hence, we planned to study CAR expression in five different human organs at autopsy in different age groups. CAR expression was analyzed in the pituitary, heart, liver, pancreas, and kidney by immunohistochemistry, and CAR mRNA expression in the heart and pituitary by real-time PCR. In the current study, CAR expression was strong in cells of the anterior pituitary, hepatocytes, and bile ducts in the liver, acini, and pancreas and distal convoluted tubule/collecting duct in the kidney, with uniform expression in all age groups. We have noted high CAR expression in fetuses and infantile hearts, which get reduced drastically in adults due to its presumed developmental role in intrauterine life studied in animal models. In addition, the receptor was expressed in glomerular podocytes around the period of fetus viability (37 weeks) but not in early fetuses and adults. We have hypothesized that this intermittent expression could be responsible for the intercellular contact normally formed between the podocytes during the developmental phase. Pancreatic islets also showed increased expression after the emergence of the viability period but not in early fetuses and adults, which might be related to an increase in fetal insulin secretion at that particular age group.
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Affiliation(s)
| | - Sumit Garg
- Department of Histopathology, Postgraduate Institute of Medical Education and Research, Chandigarh, IND
| | - Baijayantimala Mishra
- Department of Microbiology, All India Institute of Medical Sciences, Bhubaneswar, Bhubaneswar, IND
| | - Bishan Dass Radotra
- Department of Histopathology, Postgraduate Institute of Medical Education and Research, Chandigarh, IND
| | - Uma Nahar Saikia
- Department of Histopathology, Postgraduate Institute of Medical Education and Research, Chandigarh, IND
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5
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Rohrbeck M, Hoerr V, Piccini I, Greber B, Schulte JS, Hübner SS, Jeworutzki E, Theiss C, Matschke V, Stypmann J, Unger A, Ho HT, Disse P, Strutz-Seebohm N, Faber C, Müller FU, Ludwig S, Rescher U, Linke WA, Klingel K, Busch K, Peischard S, Seebohm G. Pathophysiological Mechanisms of Cardiac Dysfunction in Transgenic Mice with Viral Myocarditis. Cells 2023; 12:cells12040550. [PMID: 36831217 PMCID: PMC9954433 DOI: 10.3390/cells12040550] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2022] [Revised: 01/21/2023] [Accepted: 01/30/2023] [Indexed: 02/11/2023] Open
Abstract
Viral myocarditis is pathologically associated with RNA viruses such as coxsackievirus B3 (CVB3), or more recently, with SARS-CoV-2, but despite intensive research, clinically proven treatment is limited. Here, by use of a transgenic mouse strain (TG) containing a CVB3ΔVP0 genome we unravel virus-mediated cardiac pathophysiological processes in vivo and in vitro. Cardiac function, pathologic ECG alterations, calcium homeostasis, intracellular organization and gene expression were significantly altered in transgenic mice. A marked alteration of mitochondrial structure and gene expression indicates mitochondrial impairment potentially contributing to cardiac contractile dysfunction. An extended picture on viral myocarditis emerges that may help to develop new treatment strategies and to counter cardiac failure.
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Affiliation(s)
- Matthias Rohrbeck
- Institute for Genetics of Heart Diseases (IfGH), Department of Cardiovascular Medicine, University Hospital Münster, D-48149 Münster, Germany
| | - Verena Hoerr
- Translational Research Imaging Center, Clinic of Radiology, University Hospital Münster, D-48149 Münster, Germany
| | - Ilaria Piccini
- Institute for Genetics of Heart Diseases (IfGH), Department of Cardiovascular Medicine, University Hospital Münster, D-48149 Münster, Germany
| | - Boris Greber
- Human Stem Cell Pluripotency Laboratory, Max Planck Institute for Molecular Biomedicine, D-48149 Münster, Germany
- Chemical Genomics Centre of the Max Planck Society, 44227 Dortmund, Germany
| | - Jan Sebastian Schulte
- Institute of Pharmacology and Toxicology, University Hospital Münster, D-48149 Münster, Germany
| | - Sara-Sophie Hübner
- Translational Research Imaging Center, Clinic of Radiology, University Hospital Münster, D-48149 Münster, Germany
| | - Elena Jeworutzki
- Institute for Genetics of Heart Diseases (IfGH), Department of Cardiovascular Medicine, University Hospital Münster, D-48149 Münster, Germany
| | - Carsten Theiss
- Department of Cytology, Institute of Anatomy, Ruhr-University Bochum, D-44780 Bochum, Germany
| | - Veronika Matschke
- Department of Cytology, Institute of Anatomy, Ruhr-University Bochum, D-44780 Bochum, Germany
| | - Jörg Stypmann
- Department of Cardiovascular Medicine, Division of Cardiology, University Clinic Münster, 48149 Münster, Germany
| | - Andreas Unger
- Institute of Physiology II, Faculty of Medicine, University of Münster, D-48149 Münster, Germany
| | - Huyen Tran Ho
- Institute for Genetics of Heart Diseases (IfGH), Department of Cardiovascular Medicine, University Hospital Münster, D-48149 Münster, Germany
| | - Paul Disse
- Institute for Genetics of Heart Diseases (IfGH), Department of Cardiovascular Medicine, University Hospital Münster, D-48149 Münster, Germany
| | - Nathalie Strutz-Seebohm
- Institute for Genetics of Heart Diseases (IfGH), Department of Cardiovascular Medicine, University Hospital Münster, D-48149 Münster, Germany
| | - Cornelius Faber
- Translational Research Imaging Center, Clinic of Radiology, University Hospital Münster, D-48149 Münster, Germany
| | - Frank Ulrich Müller
- Institute of Pharmacology and Toxicology, University Hospital Münster, D-48149 Münster, Germany
| | - Stephan Ludwig
- Institute of Virology Münster (IVM), Centre for Molecular Biology of Inflammation (ZMBE), University of Münster, D-48149 Münster, Germany
| | - Ursula Rescher
- Research Group Regulatory Mechanisms of Inflammation, Institute of Medical Biochemistry, Centre for Molecular Biology of Inflammation, University of Muenster, 48149 Muenster, Germany
| | - Wolfgang A. Linke
- Institute of Physiology II, Faculty of Medicine, University of Münster, D-48149 Münster, Germany
| | - Karin Klingel
- Cardiopathology, Institute for Pathology and Neuropathology, University Hospital of Tübingen, D-72076 Tübingen, Germany
| | - Karin Busch
- Institute of Integrative Cell Biology and Physiology, Faculty of Biology, University of Muenster, Schlossplatz 5, 48149 Muenster, Germany
| | - Stefan Peischard
- Institute for Genetics of Heart Diseases (IfGH), Department of Cardiovascular Medicine, University Hospital Münster, D-48149 Münster, Germany
- Correspondence: (S.P.); (G.S.); Tel.: +49-(0)-251/83-58255 (S.P.); +49-(0)-251/83-58251 (G.S.); Fax: +49-(0)-251/83-58257 (S.P. & G.S.)
| | - Guiscard Seebohm
- Institute for Genetics of Heart Diseases (IfGH), Department of Cardiovascular Medicine, University Hospital Münster, D-48149 Münster, Germany
- Correspondence: (S.P.); (G.S.); Tel.: +49-(0)-251/83-58255 (S.P.); +49-(0)-251/83-58251 (G.S.); Fax: +49-(0)-251/83-58257 (S.P. & G.S.)
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6
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Blum SI, Taylor JP, Barra JM, Burg AR, Shang Q, Qiu S, Shechter O, Hayes AR, Green TJ, Geurts AM, Chen YG, Tse HM. MDA5-dependent responses contribute to autoimmune diabetes progression and hindrance. JCI Insight 2023; 8:157929. [PMID: 36512407 PMCID: PMC9977297 DOI: 10.1172/jci.insight.157929] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2022] [Accepted: 12/07/2022] [Indexed: 12/14/2022] Open
Abstract
Type 1 diabetes (T1D) is an autoimmune disease resulting in pancreatic β cell destruction. Coxsackievirus B3 (CVB3) infection and melanoma differentiation-associated protein 5-dependent (MDA5-dependent) antiviral responses are linked with T1D development. Mutations within IFIH1, coding for MDA5, are correlated with T1D susceptibility, but how these mutations contribute to T1D remains unclear. Utilizing nonobese diabetic (NOD) mice lacking Ifih1 expression (KO) or containing an in-frame deletion within the ATPase site of the helicase 1 domain of MDA5 (ΔHel1), we tested the hypothesis that partial or complete loss-of-function mutations in MDA5 would delay T1D by impairing proinflammatory pancreatic macrophage and T cell responses. Spontaneous T1D developed in female NOD and KO mice similarly, but was significantly delayed in ΔHel1 mice, which may be partly due to a concomitant increase in myeloid-derived suppressor cells. Interestingly, KO male mice had increased spontaneous T1D compared with NOD mice. Whereas NOD and KO mice developed CVB3-accelerated T1D, ΔHel1 mice were protected partly due to decreased type I IFNs, pancreatic infiltrating TNF+ macrophages, IFN-γ+CD4+ T cells, and perforin+CD8+ T cells. Furthermore, ΔHel1 MDA5 protein had reduced ATP hydrolysis compared with wild-type MDA5. Our results suggest that dampened MDA5 function delays T1D, yet loss of MDA5 promotes T1D.
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Affiliation(s)
- Samuel I. Blum
- Department of Microbiology, Comprehensive Diabetes Center, The University of Alabama at Birmingham, Birmingham, Alabama, USA
| | - Jared P. Taylor
- Department of Microbiology, Comprehensive Diabetes Center, The University of Alabama at Birmingham, Birmingham, Alabama, USA
| | - Jessie M. Barra
- Department of Microbiology, Comprehensive Diabetes Center, The University of Alabama at Birmingham, Birmingham, Alabama, USA
| | - Ashley R. Burg
- Department of Microbiology, Comprehensive Diabetes Center, The University of Alabama at Birmingham, Birmingham, Alabama, USA
| | - Qiao Shang
- Department of Microbiology, Comprehensive Diabetes Center, The University of Alabama at Birmingham, Birmingham, Alabama, USA
| | - Shihong Qiu
- Department of Microbiology, Comprehensive Diabetes Center, The University of Alabama at Birmingham, Birmingham, Alabama, USA
| | - Oren Shechter
- Department of Microbiology, Comprehensive Diabetes Center, The University of Alabama at Birmingham, Birmingham, Alabama, USA
| | - Aleah R. Hayes
- Department of Microbiology, Comprehensive Diabetes Center, The University of Alabama at Birmingham, Birmingham, Alabama, USA
| | - Todd J. Green
- Department of Microbiology, Comprehensive Diabetes Center, The University of Alabama at Birmingham, Birmingham, Alabama, USA
| | | | - Yi-Guang Chen
- Department of Pediatrics, Medical College of Wisconsin, Milwaukee, Wisconsin, USA
| | - Hubert M. Tse
- Department of Microbiology, Comprehensive Diabetes Center, The University of Alabama at Birmingham, Birmingham, Alabama, USA
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7
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Fan W, Mar KB, Sari L, Gaszek IK, Cheng Q, Evers BM, Shelton JM, Wight-Carter M, Siegwart DJ, Lin MM, Schoggins JW. TRIM7 inhibits enterovirus replication and promotes emergence of a viral variant with increased pathogenicity. Cell 2021; 184:3410-3425.e17. [PMID: 34062120 PMCID: PMC8276836 DOI: 10.1016/j.cell.2021.04.047] [Citation(s) in RCA: 29] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2020] [Revised: 03/23/2021] [Accepted: 04/28/2021] [Indexed: 02/07/2023]
Abstract
To control viral infection, vertebrates rely on both inducible interferon responses and less well-characterized cell-intrinsic responses composed of "at the ready" antiviral effector proteins. Here, we show that E3 ubiquitin ligase TRIM7 is a cell-intrinsic antiviral effector that restricts multiple human enteroviruses by targeting viral 2BC, a membrane remodeling protein, for ubiquitination and proteasome-dependent degradation. Selective pressure exerted by TRIM7 results in emergence of a TRIM7-resistant coxsackievirus with a single point mutation in the viral 2C ATPase/helicase. In cultured cells, the mutation helps the virus evade TRIM7 but impairs optimal viral replication, and this correlates with a hyperactive and structurally plastic 2C ATPase. Unexpectedly, the TRIM7-resistant virus has a replication advantage in mice and causes lethal pancreatitis. These findings reveal a unique mechanism for targeting enterovirus replication and provide molecular insight into the benefits and trade-offs of viral evolution imposed by a host restriction factor.
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Affiliation(s)
- Wenchun Fan
- Department of Microbiology, UT Southwestern Medical Center, Dallas, TX 75390, USA
| | - Katrina B Mar
- Department of Microbiology, UT Southwestern Medical Center, Dallas, TX 75390, USA
| | - Levent Sari
- Green Center for Molecular, Computational, and Systems Biology, UT Southwestern Medical Center, Dallas, TX 75390, USA
| | - Ilona K Gaszek
- Green Center for Molecular, Computational, and Systems Biology, UT Southwestern Medical Center, Dallas, TX 75390, USA
| | - Qiang Cheng
- Department of Biochemistry, Simmons Comprehensive Cancer Center, UT Southwestern Medical Center, Dallas, TX 75390, USA
| | - Bret M Evers
- Departments of Pathology and Ophthalmology, UT Southwestern Medical Center, Dallas, TX 75390, USA
| | - John M Shelton
- Department of Internal Medicine, Histo Pathology Core Division, UT Southwestern Medical Center, Dallas, TX 75390, USA
| | - Mary Wight-Carter
- Animal Resource Center, UT Southwestern Medical Center, Dallas, TX, USA
| | - Daniel J Siegwart
- Department of Biochemistry, Simmons Comprehensive Cancer Center, UT Southwestern Medical Center, Dallas, TX 75390, USA
| | - Milo M Lin
- Green Center for Molecular, Computational, and Systems Biology, UT Southwestern Medical Center, Dallas, TX 75390, USA
| | - John W Schoggins
- Department of Microbiology, UT Southwestern Medical Center, Dallas, TX 75390, USA.
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8
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A Crucial Role of ACBD3 Required for Coxsackievirus Infection in Animal Model Developed by AAV-Mediated CRISPR Genome Editing Technique. Viruses 2021; 13:v13020237. [PMID: 33546322 PMCID: PMC7913485 DOI: 10.3390/v13020237] [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: 01/14/2021] [Revised: 01/30/2021] [Accepted: 01/31/2021] [Indexed: 12/11/2022] Open
Abstract
Genetic screens using CRISPR/Cas9 have been exploited to discover host–virus interactions. These screens have identified viral dependencies on host proteins during their life cycle and potential antiviral strategies. The acyl-CoA binding domain containing 3 (ACBD3) was identified as an essential host factor for the Coxsackievirus B3 (CVB3) infection. Other groups have also investigated the role of ACBD3 as a host factor for diverse enteroviruses in cultured cells. However, it has not been tested if ACBD3 is required in the animal model of CVB3 infection. Owing to embryonic lethality, conventional knockout mice were not available for in vivo study. As an alternative approach, we used adeno-associated virus (AAV)-mediated CRISPR genome editing to generate mice that lacked ACBD3 within the pancreas, the major target organ for CVB3. Delivery of sgRNAs using self-complementary (sc) AAV8 efficiently induced a loss-of-function mutation in the pancreas of the Cas9 knock-in mice. Loss of ACBD3 in the pancreas resulted in a 100-fold reduction in the CVB3 titer within the pancreas and a noticeable reduction in viral protein expression. These results indicate a crucial function of ACBD3 in CVB3 infection in vivo. AAV-mediated CRISPR genome editing may be applicable to many in vivo studies on the virus–host interaction and identify a novel target for antiviral therapeutics.
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9
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Alirezaei M, Flynn CT, Garcia SD, Kimura T, Whitton JL. A food-responsive switch modulates TFEB and autophagy, and determines susceptibility to coxsackievirus infection and pancreatitis. Autophagy 2021; 17:402-419. [PMID: 32019403 PMCID: PMC8007148 DOI: 10.1080/15548627.2020.1720425] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2019] [Revised: 01/10/2020] [Accepted: 01/20/2020] [Indexed: 10/25/2022] Open
Abstract
Almost a billion people worldwide are chronically undernourished. Herein, using a mouse model of coxsackievirus B3 (CVB3) infection, we report that a single day of food restriction (FR) markedly increases susceptibility to attenuated enterovirus infection, replication, and disease. These "pro-viral" effects, which are rapidly-reversed by the restoration of food, are mediated by several genes whose expression is altered by FR, and which support CVB3 replication. Central to this is TFEB, a protein whose expression and activation status are rapidly increased by FR. TFEB, which regulates the transcription of >100 genes involved in macroautophagy/autophagy and lysosomal biogenesis, responds similarly to both FR and CVB3 infection and plays a pivotal role in determining host susceptibility to CVB3. We propose that, by upregulating TFEB, FR generates an intracellular environment that is more hospitable to the incoming virus, facilitating its replication. This interplay between nutritional status and enterovirus replication has implications for human health and, perhaps, for the evolution of these viruses.Abbreviations: Atg/ATG: autophagy-related; CAR: Coxsackievirus and adenovirus receptor; Cas9: CRISPR associated protein 9; Cre: recombinase that causes recombination; CRISPR: clustered regularly interspaced short palindromic repeats; Ctsb/CTSB: cathepsin B; CVB3: coxsackievirus B3; DsRedCVB3: a recombinant CVB3 that encodes the Discosoma red fluorescent protein; EL: elastase; FR: food restriction; GFP: green fluorescent protein; gRNA: guide RNA; HBSS: Hanks Buffered Salt Solution; LYNUS: lysosomal nutrient sensing machinery; MAP1LC3/LC3: microtubule-associated protein 1 light chain 3; MFI: mean fluorescence intensity; MOI: multiplicity of infection; MTOR: mechanistic target of rapamycin kinase; Nluc: nanoluciferase; NlucCVB3: a recombinant CVB3 encoding nanoluciferase; pfu: plaque-forming unit(s); p.i.: post infection; rCVB: recombinant coxsackievirus B3; RPS6KB/p70S6K: ribosomal protein S6 kinase; RT: room temperature; siRNA: small interfering RNA; TFEB: transcription factor EB; tg: transgenic; TUBB: β-tubulin; UNINF: uninfected; wrt: with respect to; WT: wild type.
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Affiliation(s)
- Mehrdad Alirezaei
- Department of Immunology and Microbiology, The Scripps Research Institute, La Jolla, CA, USA
| | - Claudia T. Flynn
- Department of Immunology and Microbiology, The Scripps Research Institute, La Jolla, CA, USA
| | - Selma D. Garcia
- Department of Immunology and Microbiology, The Scripps Research Institute, La Jolla, CA, USA
| | - Taishi Kimura
- Department of Immunology and Microbiology, The Scripps Research Institute, La Jolla, CA, USA
| | - J. Lindsay Whitton
- Department of Immunology and Microbiology, The Scripps Research Institute, La Jolla, CA, USA
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10
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Hepatocytes trap and silence coxsackieviruses, protecting against systemic disease in mice. Commun Biol 2020; 3:580. [PMID: 33067530 PMCID: PMC7568585 DOI: 10.1038/s42003-020-01303-7] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2020] [Accepted: 09/15/2020] [Indexed: 12/17/2022] Open
Abstract
Previous research suggests that hepatocytes catabolize chemical toxins but do not remove microbial agents, which are filtered out by other liver cells (Kupffer cells and endothelial cells). Here we show that, contrary to current understanding, hepatocytes trap and rapidly silence type B coxsackieviruses (CVBs). In genetically wildtype mice, this activity causes hepatocyte damage, which is alleviated in mice carrying a hepatocyte-specific deletion of the coxsackievirus-adenovirus receptor. However, in these mutant mice, there is a dramatic early rise in blood-borne virus, followed by accelerated systemic disease and increased mortality. Thus, wild type hepatocytes act similarly to a sponge for CVBs, protecting against systemic illness at the expense of their own survival. We speculate that hepatocytes may play a similar role in other viral infections as well, thereby explaining why hepatocytes have evolved their remarkable regenerative capacity. Our data also suggest that, in addition to their many other functions, hepatocytes might be considered an integral part of the innate immune system. Kimura, Flynn and Whitton find that hepatocytes act as a sponge to trap viruses, but that doing so damages the liver cells. They show that, when mouse hepatocytes are altered to prevent trapping of circulating virus, the mice are more likely to develop systemic disease and die, providing strong evidence for an important overlooked function of hepatocytes.
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Pappritz K, Van Linthout S. Opioid-Induced Immunomodulation: Consequences for the Experimental Coxsackievirus B3-Induced Myocarditis Model. BIOLOGY 2020; 9:biology9100335. [PMID: 33066118 PMCID: PMC7650777 DOI: 10.3390/biology9100335] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/25/2020] [Revised: 10/02/2020] [Accepted: 10/09/2020] [Indexed: 01/18/2023]
Abstract
Simple Summary Myocarditis is an inflammatory disorder of the heart mainly caused by viruses. To investigate viral myocarditis, the Coxsackievirus B3 (CVB3)-induced myocarditis model is the experimental model used since more than sixty years. In the pathogeneses of viral myocarditis, the subtle balance between pro-and anti-inflammatory immune responses is of great importance for disease manifestation. Parallel to the infection of the heart, experimental CVB3-induced myocarditis results in an infection of the pancreas, causing a severe burden for the challenged animals. In frame of animal welfare, application of analgesics is mandatory. So far, positive as well as negative effects of opioids on the immune system have been described. However, the impact of opioid application on the pathogenesis of experimental CVB3-induced myocarditis has not been investigated yet. Since examinations on disease pathways and new treatment options rely on established models to generate reproducible data, applicability of opioids in experimental CVB3-induced myocarditis needs to be carefully evaluated. For this purpose, we summarized published studies for 13 different opioids and discussed their potential impact on the CVB3-induced myocarditis model. Abstract Myocarditis is an inflammatory disorder of the heart predominantly caused by infectious agents. Since more than sixty years, the Coxsackievirus B3 (CVB3)-induced myocarditis mouse model is the experimental model used to investigate viral myocarditis. The pathogenesis of viral myocarditis is conceptually a multiphase process, initiated by the infection of cardiomyocytes, followed by activation of the immune system, and resulting in myocardial fibrosis and left ventricular dysfunction. In parallel to the direct infection of the heart, CVB3 replicates in lymphatic organs such as the pancreas. Due to infection of the pancreas, the model of experimental CVB3-induced myocarditis is estimated as a severe burden for the challenged animals. Application of analgesics in frame of the animal welfare act (European directive 2010/63/EU) is more and more becoming a matter of debate. For this purpose, we summarized published studies for 13 different opioids and discussed their potential impact on CVB3-induced myocarditis. In addition, with this summary we also want to provide guidance for researchers beyond the myocarditis field to estimate the impact of opioids on the immune system for their specific model. In the literature, both immunosuppressive as well as immune-activating effects of opioids have been described, but examinations in experimental CVB3-induced myocarditis have still not been reported so far. Based on the existing publications, administration of opioids in experimental CVB3-induced myocarditis might result in more severe disease progression, including higher mortality, or a less pronounced myocarditis model, failing to be used for the establishment of new treatment options. Taken together, the applicability of opioids in experimental CVB3-induced myocarditis and in inflammatory models in general needs to be carefully evaluated and further investigated.
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Affiliation(s)
- Kathleen Pappritz
- Campus Virchow Klinikum (CVK), Berlin Institute of Health Center for Regenerative Therapies (BCRT), Charité—Universitätsmedizin Berlin, 13353 Berlin, Germany;
- German Center for Cardiovascular Research (DZHK), Partner Site Berlin, 10115 Berlin, Germany
- Correspondence: ; Tel.: +49-(0)30-450539509
| | - Sophie Van Linthout
- Campus Virchow Klinikum (CVK), Berlin Institute of Health Center for Regenerative Therapies (BCRT), Charité—Universitätsmedizin Berlin, 13353 Berlin, Germany;
- German Center for Cardiovascular Research (DZHK), Partner Site Berlin, 10115 Berlin, Germany
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12
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El-Mahdy RI, Ramadan HKA, Mohammed HSED, Ahmed EH, Mokhtar AA, Hosni A. Impact of the etiology and Vitamin D receptor TaqI rs731236 gene polymorphism on the severity of acute pancreatitis. JOURNAL OF HEPATO-BILIARY-PANCREATIC SCIENCES 2020; 27:896-906. [PMID: 32780933 DOI: 10.1002/jhbp.817] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/19/2020] [Revised: 07/07/2020] [Accepted: 08/04/2020] [Indexed: 12/20/2022]
Abstract
BACKGROUND/PURPOSE This work aimed to assess the impact of different etiologies of acute pancreatitis (AP) and vitamin D receptor (VDR) TaqI rs731236 gene polymorphism on the severity of AP. METHODS This case-control study included 70 patients with AP and 40 healthy controls. Etiologies of AP were identified by imaging, ANA, cytomegalovirus (CMV) IgM, coxsackie B virus IgM, and IgG4. Genotyping of VDR TaqI rs731236 polymorphism, Laboratory tests and severity scores using Ranson, BISAP, Atlanta and APACHE II scores were determined. RESULTS The age in AP patients was 36.03 ± 10.76, and females were 85.7%. The etiologies of AP were as follows: biliary (51.4%), coxsackievirus (22.9%), autoimmune (14.3%), post-ERCP (8.6%) and 2.9% were idiopathic. The TT genotype of VDR polymorphism was significantly more common in AP than control (P = .001) and allele T dominated in AP group (OR = 2; 95% CI: 0.665-5.64). Most cases showed low severity scores with significant differences among etiologies and VDR genotypes. Biliary pancreatitis showed highest percentages of severe AP. However, etiologies and VDR polymorphism were not predictors of severity. CONCLUSION Etiology of AP could have impact on the disease severity. VDR gene polymorphism increases the risk of AP. Neither the etiology nor VDR gene polymorphism could predict AP severity.
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Affiliation(s)
- Reham I El-Mahdy
- Department of Medical Biochemistry and Molecular Biology, Faculty of Medicine, Assiut University, Assiut, Egypt
| | - Haidi Karam-Allah Ramadan
- Department of Tropical Medicine and Gastroenterology, Faculty of Medicine, Assiut University, Assiut, Egypt
| | | | - Entsar H Ahmed
- Department of Microbiology and Immunology, Faculty of Medicine, Assiut University, Egypt
| | - Abeer A Mokhtar
- Department of Clinical Pathology, Faculty of Medicine, Assiut University, Assiut, Egypt
| | - Amal Hosni
- Department of Clinical Pathology, Faculty of Medicine, Assiut University, Assiut, Egypt
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13
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Enteroviruses and T1D: Is It the Virus, the Genes or Both which Cause T1D. Microorganisms 2020; 8:microorganisms8071017. [PMID: 32650582 PMCID: PMC7409303 DOI: 10.3390/microorganisms8071017] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2020] [Revised: 07/04/2020] [Accepted: 07/06/2020] [Indexed: 02/07/2023] Open
Abstract
Type 1 diabetes (T1D) is a chronic autoimmune disorder that results from the selective destruction of insulin-producing β-cells in the pancreas. Up to now, the mechanisms triggering the initiation and progression of the disease are, in their complexity, not fully understood and imply the disruption of several tolerance networks. Viral infection is one of the environmental factors triggering diabetes, which is initially based on the observation that the disease’s incidence follows a periodic pattern within the population. Moreover, the strong correlation of genetic susceptibility is a prerequisite for enteroviral infection associated islet autoimmunity. Epidemiological data and clinical findings indicate enteroviral infections, mainly of the coxsackie B virus family, as potential pathogenic mechanisms to trigger the autoimmune reaction towards β-cells, resulting in the boost of inflammation following β-cell destruction and the onset of T1D. This review discusses previously identified virus-associated genetics and pathways of β-cell destruction. Is it the virus itself which leads to β-cell destruction and T1D progression? Or is it genetic, so that the virus may activate auto-immunity and β-cell destruction only in genetically predisposed individuals?
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14
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Blum SI, Tse HM. Innate Viral Sensor MDA5 and Coxsackievirus Interplay in Type 1 Diabetes Development. Microorganisms 2020; 8:microorganisms8070993. [PMID: 32635205 PMCID: PMC7409145 DOI: 10.3390/microorganisms8070993] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2020] [Revised: 07/01/2020] [Accepted: 07/01/2020] [Indexed: 12/12/2022] Open
Abstract
Type 1 diabetes (T1D) is a polygenic autoimmune disease characterized by immune-mediated destruction of insulin-producing β-cells. The concordance rate for T1D in monozygotic twins is ≈30-50%, indicating that environmental factors also play a role in T1D development. Previous studies have demonstrated that enterovirus infections such as coxsackievirus type B (CVB) are associated with triggering T1D. Prior to autoantibody development in T1D, viral RNA and antibodies against CVB can be detected within the blood, stool, and pancreata. An innate pathogen recognition receptor, melanoma differentiation-associated protein 5 (MDA5), which is encoded by the IFIH1 gene, has been associated with T1D onset. It is unclear how single nucleotide polymorphisms in IFIH1 alter the structure and function of MDA5 that may lead to exacerbated antiviral responses contributing to increased T1D-susceptibility. Binding of viral dsRNA via MDA5 induces synthesis of antiviral proteins such as interferon-alpha and -beta (IFN-α/β). Viral infection and subsequent IFN-α/β synthesis can lead to ER stress within insulin-producing β-cells causing neo-epitope generation, activation of β-cell-specific autoreactive T cells, and β-cell destruction. Therefore, an interplay between genetics, enteroviral infections, and antiviral responses may be critical for T1D development.
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15
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Nyalwidhe JO, Jurczyk A, Satish B, Redick S, Qaisar N, Trombly MI, Vangala P, Racicot R, Bortell R, Harlan DM, Greiner DL, Brehm MA, Nadler JL, Wang JP. Proteomic and Transcriptional Profiles of Human Stem Cell-Derived β Cells Following Enteroviral Challenge. Microorganisms 2020; 8:microorganisms8020295. [PMID: 32093375 PMCID: PMC7074978 DOI: 10.3390/microorganisms8020295] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2020] [Revised: 02/14/2020] [Accepted: 02/18/2020] [Indexed: 01/04/2023] Open
Abstract
Enteroviral infections are implicated in islet autoimmunity and type 1 diabetes (T1D) pathogenesis. Significant β-cell stress and damage occur with viral infection, leading to cells that are dysfunctional and vulnerable to destruction. Human stem cell-derived β (SC-β) cells are insulin-producing cell clusters that closely resemble native β cells. To better understand the events precipitated by enteroviral infection of β cells, we investigated transcriptional and proteomic changes in SC-β cells challenged with coxsackie B virus (CVB). We confirmed infection by demonstrating that viral protein colocalized with insulin-positive SC-β cells by immunostaining. Transcriptome analysis showed a decrease in insulin gene expression following infection, and combined transcriptional and proteomic analysis revealed activation of innate immune pathways, including type I interferon (IFN), IFN-stimulated genes, nuclear factor-kappa B (NF-κB) and downstream inflammatory cytokines, and major histocompatibility complex (MHC) class I. Finally, insulin release by CVB4-infected SC-β cells was impaired. These transcriptional, proteomic, and functional findings are in agreement with responses in primary human islets infected with CVB ex vivo. Human SC-β cells may serve as a surrogate for primary human islets in virus-induced diabetes models. Because human SC-β cells are more genetically tractable and accessible than primary islets, they may provide a preferred platform for investigating T1D pathogenesis and developing new treatments.
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Affiliation(s)
- Julius O. Nyalwidhe
- Department of Microbiology and Molecular Cell Biology and Leroy T. Canoles Jr. Cancer Research Center, Eastern Virginia Medical School, Norfolk, VA 23501, USA; (J.O.N.); (J.L.N.)
| | - Agata Jurczyk
- Program in Molecular Medicine, University of Massachusetts Medical School, Worcester, MA 01655, USA; (A.J.); (S.R.); (R.B.); (D.L.G.); (M.A.B.)
| | - Basanthi Satish
- Department of Medicine, University of Massachusetts Medical School, Worcester, MA 01655, USA; (B.S.); (N.Q.); (M.I.T.); (R.R.); (D.M.H.)
| | - Sambra Redick
- Program in Molecular Medicine, University of Massachusetts Medical School, Worcester, MA 01655, USA; (A.J.); (S.R.); (R.B.); (D.L.G.); (M.A.B.)
| | - Natasha Qaisar
- Department of Medicine, University of Massachusetts Medical School, Worcester, MA 01655, USA; (B.S.); (N.Q.); (M.I.T.); (R.R.); (D.M.H.)
| | - Melanie I. Trombly
- Department of Medicine, University of Massachusetts Medical School, Worcester, MA 01655, USA; (B.S.); (N.Q.); (M.I.T.); (R.R.); (D.M.H.)
| | - Pranitha Vangala
- Department of Bioinformatics and Integrative Biology, University of Massachusetts Medical School, Worcester, MA 01655, USA;
| | - Riccardo Racicot
- Department of Medicine, University of Massachusetts Medical School, Worcester, MA 01655, USA; (B.S.); (N.Q.); (M.I.T.); (R.R.); (D.M.H.)
| | - Rita Bortell
- Program in Molecular Medicine, University of Massachusetts Medical School, Worcester, MA 01655, USA; (A.J.); (S.R.); (R.B.); (D.L.G.); (M.A.B.)
| | - David M. Harlan
- Department of Medicine, University of Massachusetts Medical School, Worcester, MA 01655, USA; (B.S.); (N.Q.); (M.I.T.); (R.R.); (D.M.H.)
| | - Dale L. Greiner
- Program in Molecular Medicine, University of Massachusetts Medical School, Worcester, MA 01655, USA; (A.J.); (S.R.); (R.B.); (D.L.G.); (M.A.B.)
| | - Michael A. Brehm
- Program in Molecular Medicine, University of Massachusetts Medical School, Worcester, MA 01655, USA; (A.J.); (S.R.); (R.B.); (D.L.G.); (M.A.B.)
| | - Jerry L. Nadler
- Department of Microbiology and Molecular Cell Biology and Leroy T. Canoles Jr. Cancer Research Center, Eastern Virginia Medical School, Norfolk, VA 23501, USA; (J.O.N.); (J.L.N.)
- Department of Medicine and Pharmacology, New York Medical College, Valhalla, NY 10595, USA
| | - Jennifer P. Wang
- Department of Medicine, University of Massachusetts Medical School, Worcester, MA 01655, USA; (B.S.); (N.Q.); (M.I.T.); (R.R.); (D.M.H.)
- Correspondence: ; Tel.: +01-508-856-8414
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16
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Tong L, Qiu Y, Wang H, Qu Y, Zhao Y, Lin L, Wang Y, Xu W, Zhao W, He H, Zhao G, Zhang MH, Yang D, Ge X, Zhong Z. Expression Profile and Function Analysis of Long Non-coding RNAs in the Infection of Coxsackievirus B3. Virol Sin 2019; 34:618-630. [PMID: 31388922 DOI: 10.1007/s12250-019-00152-x] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2019] [Accepted: 06/17/2019] [Indexed: 02/07/2023] Open
Abstract
The roles of lncRNAs in the infection of enteroviruses have been barely demonstrated. In this study, we used coxsackievirus B3 (CVB3), a typical enterovirus, as a model to investigate the expression profiles and functional roles of lncRNAs in enterovirus infection. We profiled lncRNAs and mRNA expression in CVB3-infected HeLa cells by lncRNA-mRNA integrated microarrays. As a result, 700 differentially expressed lncRNAs (431 up-regulated and 269 down-regulated) and 665 differentially expressed mRNAs (299 up-regulated and 366 down-regulated) were identified in CVB3 infection. Then we performed lncRNA-mRNA integrated pathway analysis to identify potential functional impacts of the differentially expressed mRNAs, in which lncRNA-mRNA correlation network was built. According to lncRNA-mRNA correlation, we found that XLOC-001188, an lncRNA down-regulated in CVB3 infection, was negatively correlated with NFAT5 mRNA, an anti-CVB3 gene reported previously. This interaction was supported by qPCR detection following siRNA-mediated knockdown of XLOC-001188, which showed an increase of NFAT5 mRNA and a reduction of CVB3 genomic RNA. In addition, we observed that four most significantly altered lncRNAs, SNHG11, RP11-145F16.2, RP11-1023L17.1 and RP11-1021N1.2 share several common correlated genes critical for CVB3 infection, such as BRE and IRF2BP1. In all, our studies reveal the alteration of lncRNA expression in CVB3 infection and its potential influence on CVB3 replication, providing useful information for future studies of enterovirus infection.
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Affiliation(s)
- Lei Tong
- Department of Microbiology, Harbin Medical University, Harbin, 150081, China
| | - Ye Qiu
- College of Biology, Hunan University, Changsha, 410012, China
| | - Hui Wang
- Department of Microbiology, Harbin Medical University, Harbin, 150081, China
| | - Yunyue Qu
- Department of Microbiology, Harbin Medical University, Harbin, 150081, China
| | - Yuanbo Zhao
- College of Biology, Hunan University, Changsha, 410012, China
| | - Lexun Lin
- Department of Microbiology, Harbin Medical University, Harbin, 150081, China
| | - Yan Wang
- Department of Cell Biology, Harbin Medical University, Harbin, 150081, China
| | - Weizhen Xu
- Department of Microbiology, Harbin Medical University, Harbin, 150081, China
| | - Wenran Zhao
- Department of Cell Biology, Harbin Medical University, Harbin, 150081, China
| | - Hongyan He
- College of Biology, Hunan University, Changsha, 410012, China
| | - Guangze Zhao
- Department of Pathology and Laboratory Medicine, University of British Columbia, Vancouver, BC, V6Z 1Y6, Canada
| | - Mary H Zhang
- Department of Pathology and Laboratory Medicine, University of British Columbia, Vancouver, BC, V6Z 1Y6, Canada
| | - Decheng Yang
- Department of Pathology and Laboratory Medicine, University of British Columbia, Vancouver, BC, V6Z 1Y6, Canada
| | - Xingyi Ge
- College of Biology, Hunan University, Changsha, 410012, China.
| | - Zhaohua Zhong
- Department of Microbiology, Harbin Medical University, Harbin, 150081, China.
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Dai K, Wang Y, Tai S, Ni H, Lian H, Yu Y, Liao W, Zheng C, Chen Q, Kuver A, Li J. Fasudil exerts a cardio-protective effect on mice with coxsackievirus B3-induced acute viral myocarditis. Cardiovasc Ther 2018; 36:e12477. [PMID: 30380183 DOI: 10.1111/1755-5922.12477] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/25/2018] [Revised: 10/22/2018] [Accepted: 10/29/2018] [Indexed: 11/30/2022] Open
Abstract
AIMS To investigate whether there exists a cardio-protective effect of Fasudil, a selective Rho kinase (ROCK) inhibitor, in an experimental murine model of acute viral myocarditis. METHODS Male BALB/c mice were randomly assigned to three groups: control, myocarditis treated with placebo and myocarditis treated with Fasudil (n = 40 animals per group). Myocarditis was established by intraperitoneal injection with coxsackievirus B3 (CVB3). Twenty-four hours after infection, Fasudil was intraperitoneally administered for 14 consecutive days. Twenty mice were randomly selected from each group to monitor a 14-day survival rate. On day 7 and day 14, eight surviving mice from each group were sacrificed and their hearts and blood were obtained to perform serological and histological examinations. Expression of ROCKs, IL-17, IL-1b, TNFα, RORgt, and Foxp3 were quantified with RT-PCR. Plasma levels of TNF alpha, IL-1 beta, and IL-17 were measured by ELISA. In addition, protein levels of IL-17 and ROCK2 in cardiac tissues were analyzed with Western blot. RESULTS Fasudil treatment significantly increased survival, attenuated myocardial necrotic lesions, reduced CVB3 replication and expression of ROCK2 and IL-17 in the infected hearts. This treatment also imposed a T-cell subpopulation shift, from Th17 to Treg, in cardiac tissues. CONCLUSIONS ROCK pathway inhibition was cardio-protective in viral myocarditis with increased survival, decreased viral replication, and inflammatory response. These findings suggest that Fasudil might be a potential therapeutic agent for patients with viral myocarditis.
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Affiliation(s)
- Kezhi Dai
- Department of Cardiology, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, China.,School of Mental Health and the Affiliated Kangning Hospital, Wenzhou Medical University, Wenzhou, China
| | - Yaoyao Wang
- Department of Cardiology, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, China.,School of the Second Clinical Medical Sciences, Wenzhou Medical University, Wenzhou, China
| | - Sichao Tai
- Department of Cardiology, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, China
| | - Huajing Ni
- School of the First Clinical Medical Sciences, Wenzhou Medical University, Wenzhou, China
| | - Hao Lian
- Department of Cardiology, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, China.,School of the Second Clinical Medical Sciences, Wenzhou Medical University, Wenzhou, China
| | - Yan Yu
- Department of Cardiology, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, China.,School of the Second Clinical Medical Sciences, Wenzhou Medical University, Wenzhou, China
| | - Weifang Liao
- Department of Cardiology, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, China.,School of the Second Clinical Medical Sciences, Wenzhou Medical University, Wenzhou, China
| | - Cheng Zheng
- Department of Cardiology, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, China.,School of the Second Clinical Medical Sciences, Wenzhou Medical University, Wenzhou, China
| | - Qing Chen
- School of Mental Health and the Affiliated Kangning Hospital, Wenzhou Medical University, Wenzhou, China
| | - Aarti Kuver
- School of Mental Health and the Affiliated Kangning Hospital, Wenzhou Medical University, Wenzhou, China
| | - Jia Li
- Department of Cardiology, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, China
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18
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Beling A, Kespohl M. Proteasomal Protein Degradation: Adaptation of Cellular Proteolysis With Impact on Virus-and Cytokine-Mediated Damage of Heart Tissue During Myocarditis. Front Immunol 2018; 9:2620. [PMID: 30546359 PMCID: PMC6279938 DOI: 10.3389/fimmu.2018.02620] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2018] [Accepted: 10/24/2018] [Indexed: 12/26/2022] Open
Abstract
Viral myocarditis is an inflammation of the heart muscle triggered by direct virus-induced cytolysis and immune response mechanisms with most severe consequences during early childhood. Acute and long-term manifestation of damaged heart tissue and disturbances of cardiac performance involve virus-triggered adverse activation of the immune response and both immunopathology, as well as, autoimmunity account for such immune-destructive processes. It is a matter of ongoing debate to what extent subclinical virus infection contributes to the debilitating sequela of the acute disease. In this review, we conceptualize the many functions of the proteasome in viral myocarditis and discuss the adaptation of this multi-catalytic protease complex together with its implications on the course of disease. Inhibition of proteasome function is already highly relevant as a strategy in treating various malignancies. However, cardiotoxicity and immune-related adverse effects have proven significant hurdles, representative of the target's wide-ranging functions. Thus, we further discuss the molecular details of proteasome-mediated activity of the immune response for virus-mediated inflammatory heart disease. We summarize how the spatiotemporal flexibility of the proteasome might be tackled for therapeutic purposes aiming to mitigate virus-mediated adverse activation of the immune response in the heart.
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Affiliation(s)
- 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, Berlin, Germany
| | - 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, Berlin, Germany
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19
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Arena MP, Elmastour F, Sane F, Drider D, Fiocco D, Spano G, Hober D. Inhibition of coxsackievirus B4 by Lactobacillus plantarum. Microbiol Res 2018; 210:59-64. [DOI: 10.1016/j.micres.2018.03.008] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2017] [Revised: 03/05/2018] [Accepted: 03/17/2018] [Indexed: 01/14/2023]
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20
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Svedin E, Utorova R, Hühn MH, Larsson PG, Stone VM, Garimella M, Lind K, Hägglöf T, Pincikova T, Laitinen OH, McInerney GM, Scholte B, Hjelte L, Karlsson MCI, Flodström-Tullberg M. A Link Between a Common Mutation in CFTR and Impaired Innate and Adaptive Viral Defense. J Infect Dis 2017; 216:1308-1317. [PMID: 28968805 PMCID: PMC5853514 DOI: 10.1093/infdis/jix474] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2017] [Accepted: 09/06/2017] [Indexed: 12/19/2022] Open
Abstract
Acute respiratory virus infections predispose the cystic fibrosis (CF) lung to chronic bacterial colonization, which contributes to high mortality. For reasons unknown, respiratory virus infections have a prolonged duration in CF. Here, we demonstrate that mice carrying the most frequent cystic fibrosis transmembrane conductance regulator (CFTR) mutation in humans, ΔF508, show increased morbidity and mortality following infection with a common human enterovirus. ΔF508 mice demonstrated impaired viral clearance, a slower type I interferon response and delayed production of virus-neutralizing antibodies. While the ΔF508 mice had a normal immune cell repertoire, unchanged serum immunoglobulin concentrations and an intact immune response to a T-cell-independent antigen, their response to a T-cell-dependent antigen was significantly delayed. Our studies reveal a novel function for CFTR in antiviral immunity and demonstrate that the ΔF508 mutation in cftr is coupled to an impaired adaptive immune response. This important insight could open up new approaches for patient care and treatment.
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Affiliation(s)
- Emma Svedin
- Center for Infectious Medicine, Department of Medicine
| | | | | | - Pär G Larsson
- Center for Infectious Medicine, Department of Medicine
| | | | | | | | | | - Terezia Pincikova
- Center for Infectious Medicine, Department of Medicine
- Department of Clinical Science, Intervention and Technology, Karolinska Institutet, and Stockholm Cystic Fibrosis Center, Karolinska University Hospital Huddinge, Stockholm, Sweden
| | | | | | - Bob Scholte
- Department of Cell Biology and Pediatric Pulmonology, Erasmus Medical Center, Rotterdam, The Netherlands
| | - Lena Hjelte
- Department of Clinical Science, Intervention and Technology, Karolinska Institutet, and Stockholm Cystic Fibrosis Center, Karolinska University Hospital Huddinge, Stockholm, Sweden
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Echovirus 6 Infects Human Exocrine and Endocrine Pancreatic Cells and Induces Pro-Inflammatory Innate Immune Response. Viruses 2017; 9:v9020025. [PMID: 28146100 PMCID: PMC5332944 DOI: 10.3390/v9020025] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2016] [Accepted: 01/16/2017] [Indexed: 12/22/2022] Open
Abstract
Human enteroviruses (HEV), especially coxsackievirus serotype B (CVB) and echovirus (E), have been associated with diseases of both the exocrine and endocrine pancreas, but so far evidence on HEV infection in human pancreas has been reported only in islets and ductal cells. This study aimed to investigate the capability of echovirus strains to infect human exocrine and endocrine pancreatic cells. Infection of explanted human islets and exocrine cells with seven field strains of E6 caused cytopathic effect, virus titer increase and production of HEV protein VP1 in both cell types. Virus particles were found in islets and acinar cells infected with E6. No cytopathic effect or infectious progeny production was observed in exocrine cells exposed to the beta cell-tropic strains of E16 and E30. Endocrine cells responded to E6, E16 and E30 by upregulating the transcription of interferon-induced with helicase C domain 1 (IF1H1), 2′-5′-oligoadenylate synthetase 1 (OAS1), interferon-β (IFN-β), chemokine (C–X–C motif) ligand 10 (CXCL10) and chemokine (C–C motif) ligand 5 (CCL5). Echovirus 6, but not E16 or E30, led to increased transcription of these genes in exocrine cells. These data demonstrate for the first time that human exocrine cells represent a target for E6 infection and suggest that certain HEV serotypes can replicate in human pancreatic exocrine cells, while the pancreatic endocrine cells are permissive to a wider range of HEV.
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Matthäus C, Langhorst H, Schütz L, Jüttner R, Rathjen FG. Cell-cell communication mediated by the CAR subgroup of immunoglobulin cell adhesion molecules in health and disease. Mol Cell Neurosci 2016; 81:32-40. [PMID: 27871939 DOI: 10.1016/j.mcn.2016.11.009] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2016] [Revised: 11/16/2016] [Accepted: 11/17/2016] [Indexed: 12/21/2022] Open
Abstract
The immunoglobulin superfamily represents a diverse set of cell-cell contact proteins and includes well-studied members such as NCAM1, DSCAM, L1 or the contactins which are strongly expressed in the nervous system. In this review we put our focus on the biological function of a less understood subgroup of Ig-like proteins composed of CAR (coxsackievirus and adenovirus receptor), CLMP (CAR-like membrane protein) and BT-IgSF (brain and testis specific immunoglobulin superfamily). The CAR-related proteins are type I transmembrane proteins containing an N-terminal variable (V-type) and a membrane proximal constant (C2-type) Ig domain in their extracellular region which are implicated in homotypic adhesion. They are highly expressed during embryonic development in a variety of tissues including the nervous system whereby in adult stages the protein level of CAR and CLMP decreases, only BT-IgSF expression increases within age. CAR-related proteins are concentrated at specialized cell-cell communication sites such as gap or tight junctions and are present at the plasma membrane in larger protein complexes. Considerable progress has been made on the molecular structure and interactions of CAR while research on CLMP and BT-IgSF is at an early stage. Studies on mouse mutants revealed biological functions of CAR in the heart and for CLMP in the gastrointestinal and urogenital systems. Furthermore, CAR and BT-IgSF appear to regulate synaptic function in the hippocampus.
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Affiliation(s)
- Claudia Matthäus
- Max-Delbrück-Center for Molecular Medicine, Developmental Neurobiology, 13092 Berlin, Germany.
| | - Hanna Langhorst
- Max-Delbrück-Center for Molecular Medicine, Developmental Neurobiology, 13092 Berlin, Germany
| | - Laura Schütz
- Max-Delbrück-Center for Molecular Medicine, Developmental Neurobiology, 13092 Berlin, Germany
| | - René Jüttner
- Max-Delbrück-Center for Molecular Medicine, Developmental Neurobiology, 13092 Berlin, Germany
| | - Fritz G Rathjen
- Max-Delbrück-Center for Molecular Medicine, Developmental Neurobiology, 13092 Berlin, Germany.
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Kim BK, Ko H, Jeon ES, Ju ES, Jeong LS, Kim YC. 2,3,4-Trihydroxybenzyl-hydrazide analogues as novel potent coxsackievirus B3 3C protease inhibitors. Eur J Med Chem 2016; 120:202-16. [PMID: 27191615 DOI: 10.1016/j.ejmech.2016.03.085] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2015] [Revised: 03/29/2016] [Accepted: 03/30/2016] [Indexed: 10/22/2022]
Abstract
Human coxsackievirus B3 (CVB3) 3C protease plays an essential role in the viral replication of CVB3, which is a non-enveloped and positive single-stranded RNA virus belonging to Picornaviridae family, causing acute viral myocarditis mainly in children. During optimization based on SAR studies of benserazide (3), which was reported as a novel anti-CVB3 3C(pro) agent from a screening of compound libraries, the 2,3,4-trihydroxybenzyl moiety of 3 was identified as a key pharmacophore for inhibitory activity against CVB3 3C(pro). Further optimization was performed by the introduction of various aryl-alkyl substituted hydrazide moieties instead of the serine moiety of 3. Among the optimized compounds, 11Q, a 4-hydroxyphenylpentanehydrazide derivative, showed the most potent inhibitory activity (IC50 = 0.07 μM). Enzyme kinetics studies indicated that 11Q exhibited a mixed inhibitory mechanism of action. The antiviral activity against CVB3 was confirmed using the further derived analogue (14b) with more cell permeable valeryl ester group at the 2,3,4-trihydroxy moiety.
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Affiliation(s)
- Bo-Kyoung Kim
- School of Life Sciences, Gwangju Institute of Science and Technology (GIST), 123, Cheomdangwagi-ro, Buk-gu, Gwangju, 500-712, Republic of Korea
| | - Hyojin Ko
- School of Life Sciences, Gwangju Institute of Science and Technology (GIST), 123, Cheomdangwagi-ro, Buk-gu, Gwangju, 500-712, Republic of Korea
| | - Eun-Seok Jeon
- Division of Cardiology, Samsung Medical Center, Sungkyunkwan University, School of Medicine, 50 Irwon-dong, Gangnam-gu, Seoul, Republic of Korea
| | - Eun-Seon Ju
- Division of Cardiology, Samsung Medical Center, Sungkyunkwan University, School of Medicine, 50 Irwon-dong, Gangnam-gu, Seoul, Republic of Korea
| | - Lak Shin Jeong
- The Research Institute of Pharmaceutical Sciences, College of Pharmacy, Seoul National University, Seoul, 151-742, Republic of Korea.
| | - Yong-Chul Kim
- School of Life Sciences, Gwangju Institute of Science and Technology (GIST), 123, Cheomdangwagi-ro, Buk-gu, Gwangju, 500-712, Republic of Korea; Department of Biomedical Science and Engineering (BMSE), Gwangju Institute of Science and Technology (GIST), 123 Cheomdangwagi-ro, Buk-gu, Gwangju, 500-712, Republic of Korea.
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24
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Hodik M, Anagandula M, Fuxe J, Krogvold L, Dahl-Jørgensen K, Hyöty H, Sarmiento L, Frisk G. Coxsackie-adenovirus receptor expression is enhanced in pancreas from patients with type 1 diabetes. BMJ Open Diabetes Res Care 2016; 4:e000219. [PMID: 27933184 PMCID: PMC5129002 DOI: 10.1136/bmjdrc-2016-000219] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/29/2016] [Revised: 06/08/2016] [Accepted: 07/09/2016] [Indexed: 01/17/2023] Open
Abstract
OBJECTIVES One of the theories connecting enterovirus (EV) infection of human islets with type 1 diabetes (T1D) is the development of a fertile field in the islets. This implies induction of appropriate proteins for the viral replication such as the coxsackie-adenovirus receptor (CAR). The aim of this study was to investigate to what extent CAR is expressed in human islets of Langerhans, and what conditions that would change the expression. DESIGN Immunohistochemistry for CAR was performed on paraffin-embedded pancreatic tissue from patients with T1D (n=9 recent onset T1D, n=4 long-standing T1D), islet autoantibody-positive individuals (n=14) and non-diabetic controls (n=24) individuals. The expression of CAR was also examined by reverse transcription PCR on microdissected islets (n=5), exocrine tissue (n=5) and on explanted islets infected with EV or exposed to chemokines produced by EV-infected islet cells. RESULTS An increased frequency of patients with T1D and autoantibody-positive individuals expressed CAR in the pancreas (p<0.039). CAR staining was detected more frequently in pancreatic islets from patients with T1D and autoantibody-positive subjects (15/27) compared with (6/24) non-diabetic controls (p<0.033). Also in explanted islets cultured in UV-treated culture medium from coxsackievirus B (CBV)-1-infected islets, the expression of the CAR gene was increased compared with controls. Laser microdissection of pancreatic tissue revealed that CAR expression was 10-fold higher in endocrine compared with exocrine cells of the pancreas. CAR was also expressed in explanted islets and the expression level decreased with time in culture. CBV-1 infection of explanted islets clearly decreased the expression of CAR (p<0.05). In contrast, infection with echovirus 6 did not affect the expression of CAR. CONCLUSIONS CAR is expressed in pancreatic islets of patients with T1D and the expression level of CAR is increased in explanted islets exposed to proinflammatory cytokines/chemokines produced by infected islets. T1D is associated with increased levels of certain chemokines/cytokines in the islets and this might be the mechanism behind the increased expression of CAR in TID islets.
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Affiliation(s)
- M Hodik
- Department of Immunology, Genetics and Pathology , Uppsala University, The Rudbeck Laboratory , Uppsala, Uppland , Sweden
| | - M Anagandula
- Department of Immunology, Genetics and Pathology , Uppsala University, The Rudbeck Laboratory , Uppsala, Uppland , Sweden
| | - J Fuxe
- Department of Microbiology, Tumor and Cell biology, Karolinska Institutet, Stockholm, Sweden
| | - L Krogvold
- Division of Paediatric and Adolescent Medicine, Oslo University Hospital, Oslo and Faculty of Medicine, University of Oslo, Oslo, Norway
| | - K Dahl-Jørgensen
- Division of Paediatric and Adolescent Medicine, Oslo University Hospital, Oslo and Faculty of Medicine, University of Oslo, Oslo, Norway
| | - H Hyöty
- Department of Virology, University of Tampere, Tampere, Finland; FimlabLaboratories, Pirkanmaa Hospital District, Tampere, Finland
| | - L Sarmiento
- Autoimmunity Unit, Department of Clinical Sciences , Skåne University Hospital, Lund University , Malmo , Sweden
| | - G Frisk
- Department of Immunology, Genetics and Pathology , Uppsala University, The Rudbeck Laboratory , Uppsala, Uppland , Sweden
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Sarmiento L, Medina A, Aziz K, Anagandula M, Cabrera-Rode E, Fex M, Frisk G, Cilio CM. Differential effects of three echovirus strains on cell lysis and insulin secretion in beta cell derived lines. J Med Virol 2015; 88:971-8. [PMID: 26629879 DOI: 10.1002/jmv.24438] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/30/2015] [Indexed: 12/17/2022]
Abstract
In an earlier study, infection of human pancreatic islets with epidemic strains of echovirus (E4, E16, E30), with proven but differently ability to induce islet autoimmunity, resulted either in a severe damage (i.e., E16 and E30) or proceeded without visible changes in infected islets (i.e., E4). In this study, the ability of these strains to replicate in beta cells and the consequence of such an infection for beta cell lysis and beta cell function was studied in the pancreatic beta cell lines INS-1, MIN6, and NIT-1. The strains of E16 and E30 did replicate in INS1, MIN6, and NIT1 cells and resulted in a pronounced cytopathic effect within 3 days following infection. By contrast, E4 replicated in all examined insulinoma cells with no apparent cell destruction. The insulin release in response to high glucose stimulation was hampered in all infected cells (P < 0.05) when no evidence of cytolysis was present; however, the adverse effect of E16 and E30 on insulin secretion appeared to be higher than that of the E4 strain. The differential effects of echovirus infection on cell lysis, and beta cell function in the rodent insulinoma INS1, MIN6, and NIT 1 cells reflect those previously obtained in primary human islets and support the notion that the insulin-producing beta cells can harbor a non-cytopathic viral infection.
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Affiliation(s)
- Luis Sarmiento
- Cellular Autoimmunity Unit, Department of Clinical Sciences, Skåne University Hospital, Lund University, Malmo, Sweden
| | - Anya Medina
- Unit of Diabetes and Celiac Disease, Department of Clinical Sciences, Skåne University Hospital, Lund University, Malmo, Sweden
| | - Kosrat Aziz
- Cellular Autoimmunity Unit, Department of Clinical Sciences, Skåne University Hospital, Lund University, Malmo, Sweden
| | - Mahesh Anagandula
- Department of Immunology, Genetics, and Pathology, Uppsala University, Rudbeck laboratory, Uppsala, Sweden
| | - Eduardo Cabrera-Rode
- Department of Immunology and Genetics on Diabetes, National Institute of Endocrinology, Havana, Cuba
| | - Malin Fex
- Unit of Diabetes and Celiac Disease, Department of Clinical Sciences, Skåne University Hospital, Lund University, Malmo, Sweden
| | - Gun Frisk
- Department of Immunology, Genetics, and Pathology, Uppsala University, Rudbeck laboratory, Uppsala, Sweden
| | - Corrado M Cilio
- Cellular Autoimmunity Unit, Department of Clinical Sciences, Skåne University Hospital, Lund University, Malmo, Sweden
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26
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In vitro-reduced translation efficiency of coxsackievirus B3 Sabin3-like strain is correlated to impaired binding of cellular initiation factors to viral IRES RNA. Curr Microbiol 2015; 70:756-61. [PMID: 25673016 DOI: 10.1007/s00284-015-0784-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2014] [Accepted: 12/29/2014] [Indexed: 10/24/2022]
Abstract
Coxsackievirus B3 (CVB3) causes viral myocarditis and can ultimately result in dilated cardiomyopathy. There is no vaccine available for clinical use. Translation initiation of CVB3 RNA is directed by an internal ribosome entry site within the 5'-untranslated region. We have previously described that Sabin3-like mutation (U(473) to C) introduced in CVB3 genome led to a defective mutant with a serious reduction in translation efficiency. In the present study, we analyzed, in vitro, the effect of the Sabin3-like mutation on the binding affinity of RNA domain V to some standard translation initiation factors: eIF4G, eIF3b, and eIF4B by filter-binding assays and UV-crosslink assays. We have demonstrated that this single-nucleotide exchange impairs the binding affinity of these cellular factors within the mutant RNA. These data indicate how this decisive Sabin3-like mutation mediates viral translation attenuation. Taken together, these findings strongly suggest that the mutant strain could be considered a candidate for an attenuated CVB3 vaccine.
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27
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Garmaroudi FS, Marchant D, Hendry R, Luo H, Yang D, Ye X, Shi J, McManus BM. Coxsackievirus B3 replication and pathogenesis. Future Microbiol 2015; 10:629-53. [DOI: 10.2217/fmb.15.5] [Citation(s) in RCA: 101] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
ABSTRACT Viruses such as coxsackievirus B3 (CVB3) are entirely host cell-dependent parasites. Indeed, they must cleverly exploit various compartments of host cells to complete their life cycle, and consequently launch disease. Evolution has equipped this pico-rna-virus, CVB3, to use different strategies, including CVB3-induced direct damage to host cells followed by a host inflammatory response to CVB3 infection, and cell death to super-additively promote target organ tissue injury, and dysfunction. In this update, the patho-stratagems of CVB3 are explored from molecular, and systems-level approaches. In summarizing recent developments in this field, we focus particularly on mechanisms by which CVB3 can harness different host cell processes including kinases, host cell-killing and cell-eating machineries, matrix metalloproteinases and miRNAs to promote disease.
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Affiliation(s)
- Farshid S Garmaroudi
- UBC James Hogg Research Centre, Institute for Heart & Lung Health, St. Paul's Hospital, University of British Columbia, Vancouver, BC, V6Z, Canada
| | - David Marchant
- Li Ka Shing Institute of Virology, University of Alberta, Edmonton, AB, Canada
| | - Reid Hendry
- Li Ka Shing Institute of Virology, University of Alberta, Edmonton, AB, Canada
| | - Honglin Luo
- UBC James Hogg Research Centre, Institute for Heart & Lung Health, St. Paul's Hospital, University of British Columbia, Vancouver, BC, V6Z, Canada
| | - Decheng Yang
- UBC James Hogg Research Centre, Institute for Heart & Lung Health, St. Paul's Hospital, University of British Columbia, Vancouver, BC, V6Z, Canada
| | - Xin Ye
- UBC James Hogg Research Centre, Institute for Heart & Lung Health, St. Paul's Hospital, University of British Columbia, Vancouver, BC, V6Z, Canada
| | - Junyan Shi
- UBC James Hogg Research Centre, Institute for Heart & Lung Health, St. Paul's Hospital, University of British Columbia, Vancouver, BC, V6Z, Canada
| | - Bruce M McManus
- UBC James Hogg Research Centre, Institute for Heart & Lung Health, St. Paul's Hospital, University of British Columbia, Vancouver, BC, V6Z, Canada
- Centre of Excellence for Prevention of Organ Failure, Vancouver, BC, Canada
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28
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Gallagher GR, Brehm MA, Finberg RW, Barton BA, Shultz LD, Greiner DL, Bortell R, Wang JP. Viral infection of engrafted human islets leads to diabetes. Diabetes 2015; 64:1358-69. [PMID: 25392246 PMCID: PMC4375078 DOI: 10.2337/db14-1020] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Type 1 diabetes (T1D) is characterized by the destruction of the insulin-producing β-cells of pancreatic islets. Genetic and environmental factors both contribute to T1D development. Viral infection with enteroviruses is a suspected trigger for T1D, but a causal role remains unproven and controversial. Studies in animals are problematic because of species-specific differences in host cell susceptibility and immune responses to candidate viral pathogens such as coxsackievirus B (CVB). In order to resolve the controversial role of viruses in human T1D, we developed a viral infection model in immunodeficient mice bearing human islet grafts. Hyperglycemia was induced in mice by specific ablation of native β-cells. Human islets, which are naturally susceptible to CVB infection, were transplanted to restore normoglycemia. Transplanted mice were infected with CVB4 and monitored for hyperglycemia. Forty-seven percent of CVB4-infected mice developed hyperglycemia. Human islet grafts from infected mice contained viral RNA, expressed viral protein, and had reduced insulin levels compared with grafts from uninfected mice. Human-specific gene expression profiles in grafts from infected mice revealed the induction of multiple interferon-stimulated genes. Thus, human islets can become severely dysfunctional with diminished insulin production after CVB infection of β-cells, resulting in diabetes.
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Affiliation(s)
- Glen R Gallagher
- Department of Medicine, University of Massachusetts Medical School, Worcester, MA
| | - Michael A Brehm
- Program in Molecular Medicine, University of Massachusetts Medical School, Worcester, MA
| | - Robert W Finberg
- Department of Medicine, University of Massachusetts Medical School, Worcester, MA
| | - Bruce A Barton
- Department of Quantitative Health Sciences, University of Massachusetts Medical School, Worcester, MA
| | | | - Dale L Greiner
- Program in Molecular Medicine, University of Massachusetts Medical School, Worcester, MA
| | - Rita Bortell
- Program in Molecular Medicine, University of Massachusetts Medical School, Worcester, MA
| | - Jennifer P Wang
- Department of Medicine, University of Massachusetts Medical School, Worcester, MA
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29
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Discovery of itraconazole with broad-spectrum in vitro antienterovirus activity that targets nonstructural protein 3A. Antimicrob Agents Chemother 2015; 59:2654-65. [PMID: 25691649 DOI: 10.1128/aac.05108-14] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2015] [Accepted: 02/13/2015] [Indexed: 12/18/2022] Open
Abstract
There is currently no approved antiviral therapy for the prophylaxis or treatment of enterovirus infections, which remain a substantial threat to public health. To discover inhibitors that can be immediately repurposed for treatment of enterovirus infections, we developed a high-throughput screening assay that measures the cytopathic effect induced by enterovirus 71 (EV71) to screen an FDA-approved drug library. Itraconazole (ITZ), a triazole antifungal agent, was identified as an effective inhibitor of EV71 replication in the low-micromolar range (50% effective concentrations [EC50s], 1.15 μM). Besides EV71, the compound also inhibited other enteroviruses, including coxsackievirus A16, coxsackievirus B3, poliovirus 1, and enterovirus 68. Study of the mechanism of action by time-of-addition assay and transient-replicon assay revealed that ITZ targeted a step involved in RNA replication or polyprotein processing. We found that the mutations (G5213U and U5286C) conferring the resistance to the compound were in nonstructural protein 3A, and we confirmed the target amino acid substitutions (3A V51L and 3A V75A) using a reverse genetic approach. Interestingly, posaconazole, a new oral azole with a molecular structure similar to that of ITZ, also exhibited anti-EV71 activity. Moreover, ITZ-resistant viruses do not exhibit cross-resistance to posaconazole or the enviroxime-like compound GW5074, which also targets the 3A region, indicating that they may target a specific site(s) in viral genome. Although the protective activity of ITZ or posaconazole (alone or in combination with other antivirals) remains to be assessed in animal models, our findings may represent an opportunity to develop therapeutic interventions for enterovirus infection.
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30
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Larsson PG, Lakshmikanth T, Laitinen OH, Utorova R, Jacobson S, Oikarinen M, Domsgen E, Koivunen MRL, Chaux P, Devard N, Lecouturier V, Almond J, Knip M, Hyöty H, Flodström-Tullberg M. A preclinical study on the efficacy and safety of a new vaccine against Coxsackievirus B1 reveals no risk for accelerated diabetes development in mouse models. Diabetologia 2015; 58:346-54. [PMID: 25370797 DOI: 10.1007/s00125-014-3436-0] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/19/2014] [Accepted: 10/09/2014] [Indexed: 02/07/2023]
Abstract
AIMS/HYPOTHESIS Enterovirus infections have been implicated in the aetiology of autoimmune type 1 diabetes. A vaccine could be used to test the causal relationship between enterovirus infections and diabetes development. However, the development of a vaccine against a virus suspected to induce an autoimmune disease is challenging, since the vaccine itself might trigger autoimmunity. Another challenge is to select the enterovirus serotypes to target with a vaccine. Here we aimed to evaluate the function and autoimmune safety of a novel non-adjuvanted prototype vaccine to Coxsackievirus serotype B1 (CVB1), a member of the enterovirus genus. METHODS A formalin-inactivated CVB1 vaccine was developed and tested for its immunogenicity and safety in BALB/c and NOD mice. Prediabetic NOD mice were vaccinated, infected with CVB1 or mock-treated to compare the effect on diabetes development. RESULTS Vaccinated mice produced high titres of CVB1-neutralising antibodies without signs of vaccine-related side effects. Vaccinated mice challenged with CVB1 had significantly reduced levels of replicating virus in their blood and the pancreas. Prediabetic NOD mice demonstrated an accelerated onset of diabetes upon CVB1 infection whereas no accelerated disease manifestation or increased production of insulin autoantibodies was observed in vaccinated mice. CONCLUSIONS/INTERPRETATION We conclude that the prototype vaccine is safe and confers protection from infection without accelerating diabetes development in mice. These results encourage the development of a multivalent enterovirus vaccine for human use, which could be used to determine whether enterovirus infections trigger beta cell autoimmunity and type 1 diabetes in humans.
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Affiliation(s)
- Pär G Larsson
- The Center for Infectious Medicine, Department of Medicine HS, Karolinska Institutet, Karolinska University Hospital Huddinge F59, SE-141 86, Stockholm, Sweden
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31
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Routsias JG, Mavrouli MD, Antonaki G, Spanakis N, Tsakris A. Synthetic peptides for efficient discrimination of anti-enterovirus antibodies at the serotype level. Peptides 2014; 58:52-9. [PMID: 24929043 DOI: 10.1016/j.peptides.2014.04.017] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/04/2014] [Revised: 04/22/2014] [Accepted: 04/23/2014] [Indexed: 11/29/2022]
Abstract
Enteroviruses are important human pathogens, causing a broad spectrum of diseases from minor common colds to fatal myocarditis. However, certain disease syndromes are caused by one or few serotypes. Serotype identification is difficult due to the laborious neutralization tests that lack of sensitivity, while in commercial ELISAs homotypic antibodies' activities are largely masked by the recognition of genera-specific epitopes by heterotypic antibodies. In the present study homotypic assays were developed with the ability to discriminate different enterovirus serotypes. Seventy-three children sera, positive for IgM antibodies against enterovirus genus and 49 healthy children were examined for the presence of antibodies against 14 synthetic peptides derived from a non-conserved region of the VP1 protein of coxsackieviruses B2, B3, B4, B5, A9, A16, A24, echoviruses 6, 7, 9, 11, 30, enterovirus 71 and parechovirus 1. 50% of the anti-enterovirus IgM positive sera (>150 BU) reacted with the peptides with the majority of them to preferentially recognize one of them, supporting the homotypic nature of our assay. Inhibition studies yielded homologous inhibition rates 67-95% suggesting that specific peptide recognition actually occurred. The diagnostic value of our assay was tested in blood samples drawn over a 1.5-year period from a 5-year old patient. The anti-enterovirus reactivity was clearly attributed to echovirus serotype 11. The IgM/IgG antibody ratio was reversed 4 months later and subsequently IgM antibodies dropped below the cutoff point. In this paper we demonstrate that our assay can be used to discriminate between antibodies targeting different enterovirus serotypes.
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Affiliation(s)
- John G Routsias
- Department of Microbiology, School of Medicine, University of Athens, 75 Mikras Asias, 11527 Athens, Greece.
| | - Maria D Mavrouli
- Department of Microbiology, School of Medicine, University of Athens, 75 Mikras Asias, 11527 Athens, Greece
| | - Georgia Antonaki
- Department of Microbiology, NICU Aglaia Kyriakou Children's Hospital, University of Athens, Athens, Greece
| | - Nikolaos Spanakis
- Department of Microbiology, School of Medicine, University of Athens, 75 Mikras Asias, 11527 Athens, Greece
| | - Athanassios Tsakris
- Department of Microbiology, School of Medicine, University of Athens, 75 Mikras Asias, 11527 Athens, Greece
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32
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Coxsackievirus B3 VLPs purified by ion exchange chromatography elicit strong immune responses in mice. Antiviral Res 2014; 104:93-101. [DOI: 10.1016/j.antiviral.2014.01.013] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2013] [Revised: 12/20/2013] [Accepted: 01/20/2014] [Indexed: 01/29/2023]
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33
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De Martino L, Capalbo D, Improda N, D'Elia F, Di Mase R, D'Assante R, D'Acunzo I, Pignata C, Salerno M. APECED: A Paradigm of Complex Interactions between Genetic Background and Susceptibility Factors. Front Immunol 2013; 4:331. [PMID: 24167503 PMCID: PMC3805967 DOI: 10.3389/fimmu.2013.00331] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2013] [Accepted: 09/30/2013] [Indexed: 01/08/2023] Open
Abstract
Autoimmune polyendocrinopathy-candidiasis-ectodermal dystrophy (APECED) is a rare autosomal recessive disease, caused by mutations of a single gene named Autoimmune regulator gene (AIRE) which results in a failure of T-cell tolerance. Central tolerance takes place within the thymus and represents the mechanism by which potentially auto-reactive T-cells are eliminated through the negative selection process. The expression of tissue-specific antigens (TSAs) by medullary thymic epithelial cells (mTECs) in the thymus is a key process in the central tolerance and is driven by the protein encoded by AIRE gene, the transcription factor autoimmune regulator (AIRE). A failure in this process caused by AIRE mutations is thought to be responsible of the systemic autoimmune reactions of APECED. APECED is characterized by several autoimmune endocrine and non-endocrine manifestations and the phenotype is often complex. Although APECED is the paradigm of a monogenic autoimmune disorder, it is characterized by a wide variability of the clinical expression even between siblings with the same genotype, thus implying that additional mechanisms, other than the failure of Aire function, are involved in the pathogenesis of the disease. Unraveling open issues of the molecular basis of APECED, will help improve diagnosis, management, and therapeutical strategies of this complex disease.
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Affiliation(s)
- Lucia De Martino
- Pediatric Section, Department of Translational Medical Sciences, "Federico II" University , Naples , Italy
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Steinke K, Sachse F, Ettischer N, Strutz‐Seebohm N, Henrion U, Rohrbeck M, Klosowski R, Wolters D, Brunner S, Franz W, Pott L, Munoz C, Kandolf R, Schulze‐Bahr E, Lang F, Klingel K, Seebohm G. Coxsackievirus B3 modulates cardiac ion channels. FASEB J 2013; 27:4108-21. [DOI: 10.1096/fj.13-230193] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Katja Steinke
- Institute for Genetics of Heart Diseases (IfGH)Department of Cardiovascular MedicineUniversity Hospital MünsterMünsterGermany
- Department of Biochemistry ICation Channel GroupRuhr University BochumBochumGermany
| | - Frank Sachse
- Nora Eccles Cardiovascular Research and Training InstituteUniversity of UtahSalt Lake CityUtahUSA
- Department of BioengineeringUniversity of UtahSalt Lake CityUtahUSA
| | - Nicole Ettischer
- Department of Molecular PathologyUniversity Hospital of TuebingenTuebingenGermany
| | - Nathalie Strutz‐Seebohm
- Institute for Genetics of Heart Diseases (IfGH)Department of Cardiovascular MedicineUniversity Hospital MünsterMünsterGermany
| | - Ulrike Henrion
- Institute for Genetics of Heart Diseases (IfGH)Department of Cardiovascular MedicineUniversity Hospital MünsterMünsterGermany
- Department of Physiology IUniversity of TuebingenTuebingenGermany
| | - Matthias Rohrbeck
- Institute for Genetics of Heart Diseases (IfGH)Department of Cardiovascular MedicineUniversity Hospital MünsterMünsterGermany
| | - Rafael Klosowski
- Department of Analytical ChemistryRuhr University BochumBochumGermany
| | - Dirk Wolters
- Department of Analytical ChemistryRuhr University BochumBochumGermany
| | - Stefan Brunner
- Department of Biochemistry ICation Channel GroupRuhr University BochumBochumGermany
| | - Wolfgang‐Michael Franz
- Department of Internal Medicine ILudwig Maximilians UniversityCampus GrosshadernMunichGermany
| | - Lutz Pott
- Department of Cellular PhysiologyRuhr University BochumBochumGermany
| | - Carlos Munoz
- Department of Physiology IUniversity of TuebingenTuebingenGermany
| | - Reinhard Kandolf
- Nora Eccles Cardiovascular Research and Training InstituteUniversity of UtahSalt Lake CityUtahUSA
- Department of BioengineeringUniversity of UtahSalt Lake CityUtahUSA
| | - Eric Schulze‐Bahr
- Institute for Genetics of Heart Diseases (IfGH)Department of Cardiovascular MedicineUniversity Hospital MünsterMünsterGermany
| | - Florian Lang
- Department of Physiology IUniversity of TuebingenTuebingenGermany
| | - Karin Klingel
- Department of Molecular PathologyUniversity Hospital of TuebingenTuebingenGermany
| | - Guiscard Seebohm
- Institute for Genetics of Heart Diseases (IfGH)Department of Cardiovascular MedicineUniversity Hospital MünsterMünsterGermany
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Coppieters KT, Boettler T, von Herrath M. Virus infections in type 1 diabetes. Cold Spring Harb Perspect Med 2013; 2:a007682. [PMID: 22315719 DOI: 10.1101/cshperspect.a007682] [Citation(s) in RCA: 75] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
The precise etiology of type 1 diabetes (T1D) is still unknown, but viruses have long been suggested as a potential environmental trigger for the disease. However, despite decades of research, the body of evidence supporting a relationship between viral infections and initiation or acceleration of islet autoimmunity remains largely circumstantial. The most robust association with viruses and T1D involves enterovirus species, of which some strains have the ability to induce or accelerate disease in animal models. Several hypotheses have been formulated to mechanistically explain how viruses may affect islet autoimmunity and β-cell decay. The recent observation that certain viral infections, when encountered at the right time and infectious dose, can prevent autoimmune diabetes illustrates that potential relationships may be more complex than previously thought. Here, we provide a concise summary of data obtained in mouse models and humans, and identify future avenues toward a better characterization of the association between viruses and T1D.
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Affiliation(s)
- Ken T Coppieters
- Center for Type 1 Diabetes Research, La Jolla Institute for Allergy and Immunology, La Jolla, California 92037, USA
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Sesti-Costa R, Silva GK, Proença-Módena JL, Carlos D, Silva ML, Alves-Filho JC, Arruda E, Liew FY, Silva JS. The IL-33/ST2 pathway controls coxsackievirus B5-induced experimental pancreatitis. THE JOURNAL OF IMMUNOLOGY 2013; 191:283-92. [PMID: 23733876 DOI: 10.4049/jimmunol.1202806] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
Coxsackievirus B (CVB) is a common cause of acute and chronic infectious myocarditis and pancreatitis. Th1 cells producing IFN-γ and TNF-α are important for CVB clearance, but they are also associated with the pathogenesis of inflammatory lesions, suggesting that the modulation of Th1 and Th2 balance is likely important in controlling CVB-induced pancreatitis. We investigated the role of IL-33, which is an important recently discovered cytokine for induction of Th2-associated responses, in experimental CVB5 infection. We found that mice deficient in IL-33R, T1/ST2, significantly developed more severe pancreatitis, had greater weight loss, and contained higher viral load compared with wild-type (WT) mice when infected with CVB5. Conversely, WT mice treated with rIL-33 developed significantly lower viral titers, and pancreatitis was attenuated. Mechanistic studies demonstrated that IL-33 enhances the degranulation and production of IFN-γ and TNF-α by CD8(+) T and NK cells, which is associated with viral clearance. Furthermore, IL-33 triggers the production of IL-4 from mast cells, which results in enhanced differentiation of M2 macrophages and regulatory T cells, leading to the attenuation of inflammatory pancreatitis. Adoptively transferred mast cells or M2 macrophages reversed the heightened pancreatitis in the T1/ST2(-/-) mice. In contrast, inhibition of regulatory T cells exacerbated the disease in WT mice. Together, our findings reveal an unrecognized IL-33/ST2 functional pathway and a key mechanism for CVB5-induced pancreatitis. These data further suggest a novel approach in treating virus-induced pancreatitis, which is a major medical condition with unmet clinical needs.
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Affiliation(s)
- Renata Sesti-Costa
- Department of Biochemistry and Immunology, University of São Paulo-Ribeirão Preto School of Medicine, Monte Alegre, Ribeirão Preto, São Paulo, Brazil
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Hodik M, Lukinius A, Korsgren O, Frisk G. Tropism Analysis of Two Coxsackie B5 Strains Reveals Virus Growth in Human Primary Pancreatic Islets but not in Exocrine Cell Clusters In Vitro. Open Virol J 2013; 7:49-56. [PMID: 23723955 PMCID: PMC3657700 DOI: 10.2174/1874357901307010049] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2012] [Revised: 12/14/2012] [Accepted: 12/17/2012] [Indexed: 12/15/2022] Open
Abstract
Human Enteroviruses (HEVs) have been implicated in human pancreatic diseases such as pancreatitis and type 1 diabetes (T1D). Human studies are sparse or inconclusive and our aim was to investigate the tropism of two strains of Coxsackie B virus 5 (CBV-5) in vitro to primary human pancreatic cells. Virus replication was measured with TCID50 titrations of aliquots of the culture medium at different time points post inoculation. The presence of virus particles or virus proteins within the pancreatic cells was studied with immunohistochemistry (IHC) and electron microscopy (EM). None of the strains replicated in the human exocrine cell clusters, in contrast, both strains replicated in the endocrine islets of Langerhans. Virus particles were found exclusively in the endocrine cells, often in close association with insulin granules. In conclusion, CBV-5 can replicate in human endocrine cells but not in human exocrine cells, thus they might not be the cause of pancreatitis in humans. The association of virus with insulin granules might reflect the use of these as replication scaffolds.
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Affiliation(s)
- M Hodik
- Department of Immunology, Genetics and Pathology, Rudbeck Laboratory, Uppsala University, Uppsala, Sweden
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Souii A, M’hadheb-Gharbi MB, Sargueil B, Brossard A, Chamond N, Aouni M, Gharbi J. Ribosomal Initiation Complex Assembly within the Wild-Strain of Coxsackievirus B3 and Live-Attenuated Sabin3-like IRESes during the Initiation of Translation. Int J Mol Sci 2013; 14:4400-18. [PMID: 23439549 PMCID: PMC3634407 DOI: 10.3390/ijms14034400] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2013] [Revised: 02/16/2013] [Accepted: 02/19/2013] [Indexed: 12/18/2022] Open
Abstract
Coxsackievirus B3 (CVB3) is an enterovirus of the family of Picornaviridae. The Group B coxsackieviruses include six serotypes (B1 to B6) that cause a variety of human diseases, including myocarditis, meningitis, and diabetes. Among the group B, the B3 strain is mostly studied for its cardiovirulence and its ability to cause acute and persistent infections. Translation initiation of CVB3 RNA has been shown to be mediated by a highly ordered structure of the 5'-untranslated region (5'UTR), which harbors an internal ribosome entry site (IRES). Translation initiation is a complex process in which initiator tRNA, 40S and 60S ribosomal subunits are assembled by eukaryotic initiation factors (eIFs) into an 80S ribosome at the initiation codon of the mRNA. We have previously addressed the question of whether the attenuating mutations of domain V of the poliovirus IRES were specific for a given genomic context or whether they could be transposed and extrapolated to a genomic related virus, i.e., CVB3 wild-type strain. In this context, we have described that Sabin3-like mutation (U473→C) introduced in CVB3 genome led to a defective mutant with a serious reduction in translation efficiency. In this study, we analyzed the efficiency of formation of ribosomal initiation complexes 48S and 80S through 10%-30% and 10%-50% sucrose gradients using rabbit reticulocyte lysates (RRLs) and stage-specific translation inhibitors: 5'-Guanylyl-imidodiphosphate (GMP-PNP) and Cycloheximide (CHX), respectively. We demonstrated that the interaction of 48S and 80S ribosomal complexes within the mutant CVB3 RNA was abolished compared with the wild-type RNA by ribosome assembly analysis. Taken together, it is possible that the mutant RNA was unable to interact with some trans-acting factors critical for enhanced IRES function.
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Affiliation(s)
- Amira Souii
- Laboratoire des Maladies Transmissibles et Substances Biologiquement Actives (LR99-ES27), Faculté de Pharmacie de Monastir, Avenue Avicenne, Monastir 5000, Tunisia; E-Mails: (M.B.M.-G.); (M.A.); (J.G.)
- Author to whom correspondence should be addressed; E-Mail: ; Tel.: +216-24-845-996
| | - Manel Ben M’hadheb-Gharbi
- Laboratoire des Maladies Transmissibles et Substances Biologiquement Actives (LR99-ES27), Faculté de Pharmacie de Monastir, Avenue Avicenne, Monastir 5000, Tunisia; E-Mails: (M.B.M.-G.); (M.A.); (J.G.)
- Institut Supérieur de Biotechnologie de Monastir, Université de Monastir, Avenue Tahar Hadded, BP 74, Monastir 5000, Tunisia
| | - Bruno Sargueil
- Laboratoire de Cristallographie et RMN Biologiques (UMR 8015), Faculté de Pharmacie, Université Paris Descartes, 4 Avenue de l’Observatoire, Paris 75270 Cedex 06, France; E-Mails: (B.S.); (A.B.); (N.C.)
| | - Audrey Brossard
- Laboratoire de Cristallographie et RMN Biologiques (UMR 8015), Faculté de Pharmacie, Université Paris Descartes, 4 Avenue de l’Observatoire, Paris 75270 Cedex 06, France; E-Mails: (B.S.); (A.B.); (N.C.)
| | - Nathalie Chamond
- Laboratoire de Cristallographie et RMN Biologiques (UMR 8015), Faculté de Pharmacie, Université Paris Descartes, 4 Avenue de l’Observatoire, Paris 75270 Cedex 06, France; E-Mails: (B.S.); (A.B.); (N.C.)
| | - Mahjoub Aouni
- Laboratoire des Maladies Transmissibles et Substances Biologiquement Actives (LR99-ES27), Faculté de Pharmacie de Monastir, Avenue Avicenne, Monastir 5000, Tunisia; E-Mails: (M.B.M.-G.); (M.A.); (J.G.)
| | - Jawhar Gharbi
- Laboratoire des Maladies Transmissibles et Substances Biologiquement Actives (LR99-ES27), Faculté de Pharmacie de Monastir, Avenue Avicenne, Monastir 5000, Tunisia; E-Mails: (M.B.M.-G.); (M.A.); (J.G.)
- Institut Supérieur de Biotechnologie de Monastir, Université de Monastir, Avenue Tahar Hadded, BP 74, Monastir 5000, Tunisia
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Ghazarian L, Diana J, Simoni Y, Beaudoin L, Lehuen A. Prevention or acceleration of type 1 diabetes by viruses. Cell Mol Life Sci 2013; 70:239-55. [PMID: 22766971 PMCID: PMC11113684 DOI: 10.1007/s00018-012-1042-1] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2011] [Revised: 05/22/2012] [Accepted: 05/24/2012] [Indexed: 12/31/2022]
Abstract
Type 1 diabetes is an autoimmune disease characterized by the destruction of insulin-producing pancreatic β-cells. Even though extensive scientific research has yielded important insights into the immune mechanisms involved in pancreatic β-cell destruction, little is known about the events that trigger the autoimmune process. Recent epidemiological and experimental data suggest that environmental factors are involved in this process. In this review, we discuss the role of viruses as an environmental factor on the development of type 1 diabetes, and the immune mechanisms by which they can trigger or protect against this pathology.
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Affiliation(s)
- Liana Ghazarian
- Hôpital Saint Vincent de Paul/Cochin, Batiment Petit, 82 Avenue Denfert-Rochereau, 75014 Paris, France
| | - Julien Diana
- Hôpital Saint Vincent de Paul/Cochin, Batiment Petit, 82 Avenue Denfert-Rochereau, 75014 Paris, France
| | - Yannick Simoni
- Hôpital Saint Vincent de Paul/Cochin, Batiment Petit, 82 Avenue Denfert-Rochereau, 75014 Paris, France
| | - Lucie Beaudoin
- Hôpital Saint Vincent de Paul/Cochin, Batiment Petit, 82 Avenue Denfert-Rochereau, 75014 Paris, France
| | - Agnès Lehuen
- Hôpital Saint Vincent de Paul/Cochin, Batiment Petit, 82 Avenue Denfert-Rochereau, 75014 Paris, France
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Coxsackievirus B3 infects the bone marrow and diminishes the restorative capacity of erythroid and lymphoid progenitors. J Virol 2012; 87:2823-34. [PMID: 23269810 DOI: 10.1128/jvi.03004-12] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023] Open
Abstract
Coxsackievirus B3 (CVB3) is known to infect stem cells in the neonatal central nervous system. Here, we evaluated the effects of CVB3 infection on the major source and repository of stem cells, the bone marrow (BM). Viral genome was detectable in BM within 24 h of infection, and productive infection of BM cells was evident, peaking at 48 h postinfection (p.i.), when ∼1 to 2% of BM cells produced infectious virus particles. Beginning at 2 to 3 days p.i., a dramatic and persistent loss of immature erythroid cells, B and T lymphocytes, and neutrophils was observed in BM and, by day 3 to 4 p.i., the femoral BM stroma was largely destroyed. Analysis of peripheral blood revealed a modest neutrophilia, a loss of reticulocytes, and a massive lymphopenia. The abundance of multipotent progenitor cells (Lin(-)/c-kit(+)/Flt3(+)) in BM declined ∼10-fold during CVB3 infection and, consistent with a deficiency of primitive hematopoietic progenitors, serum levels of the hematopoietic growth factor Flt3 ligand were dramatically elevated. Therefore, we analyzed the regenerative capacity of BM from CVB3-infected mice. Granulocyte/macrophage progenitors displayed a relatively normal proliferative ability, consistent with the fact that the peripheral blood level of neutrophils-which are very short-lived cells-remained high throughout infection. However, erythroid and lymphoid hematopoietic progenitors in BM from CVB3-infected mice showed a markedly reduced colony-forming capacity, consonant with the observed loss of both lymphocytes and immature erythroid cells/reticulocytes from the BM and peripheral blood. In summary, CVB3 infects the BM and exerts differential effects on the various hematopoietic progenitor populations.
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41
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Buskiewicz IA, Koenig A, Huber SA, Budd RC. Caspase-8 and FLIP regulate RIG-I/MDA5-induced innate immune host responses to picornaviruses. Future Virol 2012; 7:1221-1236. [PMID: 23503762 DOI: 10.2217/fvl.12.115] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Picornaviruses are small, nonenveloped, positive-stranded RNA viruses, which cause a wide range of animal and human diseases, based on their distinct tissue and cell type tropisms. Myocarditis, poliomyelitis, hepatitis and the common cold are the most significant human illnesses caused by picornaviruses. The host response to picornaviruses is complex, and the damage to tissues occurs not only from direct viral replication within infected cells. Picornaviruses exhibit an exceptional ability to evade the early innate immune response, resulting in chronic infection and autoimmunity. This review discusses the detailed aspects of the early innate host response to picornaviruses infection mediated by RIG-I-like helicases, their adaptor, mitochondrial ant iviral signaling protein, innate immune-induced apoptosis, and the role of caspase-8 and its regulatory paralog, FLIP, in these processes.
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Affiliation(s)
- Iwona A Buskiewicz
- Department of Pathology, Vermont Center for Immunology & Infectious Diseases, University of Vermont, Burlington, VT 05405, USA
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42
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Gnädig NF, Beaucourt S, Campagnola G, Bordería AV, Sanz-Ramos M, Gong P, Blanc H, Peersen OB, Vignuzzi M. Coxsackievirus B3 mutator strains are attenuated in vivo. Proc Natl Acad Sci U S A 2012; 109:E2294-303. [PMID: 22853955 PMCID: PMC3427060 DOI: 10.1073/pnas.1204022109] [Citation(s) in RCA: 116] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
Based on structural data of the RNA-dependent RNA polymerase, rational targeting of key residues, and screens for Coxsackievirus B3 fidelity variants, we isolated nine polymerase variants with mutator phenotypes, which allowed us to probe the effects of lowering fidelity on virus replication, mutability, and in vivo fitness. These mutator strains generate higher mutation frequencies than WT virus and are more sensitive to mutagenic treatments, and their purified polymerases present lower-fidelity profiles in an in vitro incorporation assay. Whereas these strains replicate with WT-like kinetics in tissue culture, in vivo infections reveal a strong correlation between mutation frequency and fitness. Variants with the highest mutation frequencies are less fit in vivo and fail to productively infect important target organs, such as the heart or pancreas. Furthermore, whereas WT virus is readily detectable in target organs 30 d after infection, some variants fail to successfully establish persistent infections. Our results show that, although mutator strains are sufficiently fit when grown in large population size, their fitness is greatly impacted when subjected to severe bottlenecking, which would occur during in vivo infection. The data indicate that, although RNA viruses have extreme mutation frequencies to maximize adaptability, nature has fine-tuned replication fidelity. Our work forges ground in showing that the mutability of RNA viruses does have an upper limit, where larger than natural genetic diversity is deleterious to virus survival.
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Affiliation(s)
- Nina F. Gnädig
- Institut Pasteur, Centre National de la Recherche Scientifique Unité de Recherche Associée 3015, 75724 Paris Cedex 15, France
- University of Paris Diderot, Sorbonne Paris Cite, Cellule Pasteur, 75015 Paris, France; and
| | - Stéphanie Beaucourt
- Institut Pasteur, Centre National de la Recherche Scientifique Unité de Recherche Associée 3015, 75724 Paris Cedex 15, France
| | - Grace Campagnola
- Department of Biochemistry and Molecular Biology, Colorado State University, Fort Collins, CO 80523
| | - Antonio V. Bordería
- Institut Pasteur, Centre National de la Recherche Scientifique Unité de Recherche Associée 3015, 75724 Paris Cedex 15, France
| | - Marta Sanz-Ramos
- Institut Pasteur, Centre National de la Recherche Scientifique Unité de Recherche Associée 3015, 75724 Paris Cedex 15, France
| | - Peng Gong
- Department of Biochemistry and Molecular Biology, Colorado State University, Fort Collins, CO 80523
| | - Hervé Blanc
- Institut Pasteur, Centre National de la Recherche Scientifique Unité de Recherche Associée 3015, 75724 Paris Cedex 15, France
| | - Olve B. Peersen
- Department of Biochemistry and Molecular Biology, Colorado State University, Fort Collins, CO 80523
| | - Marco Vignuzzi
- Institut Pasteur, Centre National de la Recherche Scientifique Unité de Recherche Associée 3015, 75724 Paris Cedex 15, France
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Yao H, Zhang Y, He F, Wang C, Xiao Z, Zou J, Wang F, Liu Z. Short hairpin RNA targeting 2B gene of coxsackievirus B3 exhibits potential antiviral effects both in vitro and in vivo. BMC Infect Dis 2012; 12:177. [PMID: 22863145 PMCID: PMC3482581 DOI: 10.1186/1471-2334-12-177] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2011] [Accepted: 07/28/2012] [Indexed: 11/20/2022] Open
Abstract
Background Coxsackievirus B3 is an important infectious agent of viral myocarditis, pancreatitis and aseptic meningitis, but there are no specific antiviral therapeutic reagents in clinical use. RNA interference-based technology has been developed to prevent the viral infection. Methods To evaluate the impact of RNA interference on viral replication, cytopathogenicity and animal survival, short hairpin RNAs targeting the viral 2B region (shRNA-2B) expressed by a recombinant vector (pGCL-2B) or a recombinant lentivirus (Lenti-2B) were tansfected in HeLa cells or transduced in mice infected with CVB3. Results ShRNA-2B exhibited a significant effect on inhibition of viral production in HeLa cells. Furthermore, shRNA-2B improved mouse survival rate, reduced the viral tissues titers and attenuated tissue damage compared with those of the shRNA-NC treated control group. Lenti-2B displayed more effective role in inhibition of viral replication than pGCL-2B in vivo. Conclusions Coxsackievirus B3 2B is an effective target of gene silencing against coxsackievirus B3 infection, suggesting that shRNA-2B is a potential agent for further development into a treatment for enterviral diseases.
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Affiliation(s)
- Hailan Yao
- Molecular Immunology Laboratory, Capital Institute of Pediatrics, YaBao Road 2, Beijing, 100020, China
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Alirezaei M, Flynn CT, Wood MR, Whitton JL. Pancreatic acinar cell-specific autophagy disruption reduces coxsackievirus replication and pathogenesis in vivo. Cell Host Microbe 2012; 11:298-305. [PMID: 22423969 DOI: 10.1016/j.chom.2012.01.014] [Citation(s) in RCA: 64] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2011] [Revised: 12/08/2011] [Accepted: 01/16/2012] [Indexed: 02/08/2023]
Abstract
Autophagy protects against many infections by inducing the lysosomal-mediated degradation of invading pathogens. However, previous in vitro studies suggest that some enteroviruses not only evade these protective effects but also exploit autophagy to facilitate their replication. We generated Atg5(f/f)/Cre(+) mice, in which the essential autophagy gene Atg5 is specifically deleted in pancreatic acinar cells, and show that coxsackievirus B3 (CVB3) requires autophagy for optimal infection and pathogenesis. Compared to Cre(-) littermates, Atg5(f/f)/Cre(+) mice had an ∼2,000-fold lower CVB3 titer in the pancreas, and pancreatic pathology was greatly diminished. Both in vivo and in vitro, Atg5(f/f)/Cre(+) acinar cells had reduced intracellular viral RNA and proteins. Furthermore, intracellular structural elements induced upon CVB3 infection, such as compound membrane vesicles and highly geometric paracrystalline arrays, which may represent viral replication platforms, were infrequently observed in infected Atg5(f/f)/Cre(+) cells. Thus, CVB3-induced subversion of autophagy not only benefits the virus but also exacerbates pancreatic pathology.
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Affiliation(s)
- Mehrdad Alirezaei
- Department of Immunology and Microbial Science, The Scripps Research Institute, La Jolla, CA 92037, USA
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45
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Kemball CC, Flynn CT, Hosking MP, Botten J, Whitton JL. Wild-type coxsackievirus infection dramatically alters the abundance, heterogeneity, and immunostimulatory capacity of conventional dendritic cells in vivo. Virology 2012; 429:74-90. [PMID: 22551767 DOI: 10.1016/j.virol.2012.04.005] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2011] [Revised: 11/29/2011] [Accepted: 04/11/2012] [Indexed: 12/21/2022]
Abstract
In vitro studies have shown that enteroviruses employ strategies that may impair the ability of DCs to trigger T cell immunity, but it is unclear how these viruses affect DCs in vivo. Here, we evaluate the effects of wild-type (wt) coxsackievirus B3 on DCs in vitro and in a murine model in vivo. Although CVB3 does not productively infect the vast majority of DCs, virus infection profoundly reduces splenic conventional DC numbers and diminishes their capacity to prime naïve CD8(+) T cells in vitro. In contrast to recombinant CVB3, highly pathogenic wt virus infection significantly diminishes the host's capacity to mount T cell responses, which is temporally associated with the loss of CD8α(+) DCs. Our findings demonstrate that enterovirus infection substantially alters the number, heterogeneity, and stimulatory capacity of DCs in vivo, and these dramatic immunomodulatory effects may weaken the host's capacity to mount antiviral T cell responses.
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Affiliation(s)
- Christopher C Kemball
- Department of Immunology and Microbial Science, The Scripps Research Institute, La Jolla, CA 92037, USA.
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Capalbo D, Fusco A, Aloj G, Improda N, Vitiello L, Dianzani U, Betterle C, Salerno M, Pignata C. High intrafamilial variability in autoimmune polyendocrinopathy-candidiasis-ectodermal dystrophy: a case study. J Endocrinol Invest 2012; 35:77-81. [PMID: 22071465 DOI: 10.3275/8055] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
INTRODUCTION Autoimmune polyendocrinopathy- candidiasis-ectodermal-dystrophy syndrome (APECED) is a monogenic disease whose phenotype may reveal wide heterogeneity. The reasons of this variability still remain obscure. PATIENTS AND METHODS Two APECED siblings with identical genotype and extremely different phenotype were compared with regard to exposure to infectious triggers, autoantibodies' profile, mechanisms of peripheral tolerance, and human leukocyte antigen (HLA) haplotype. The following infectious markers were evaluated: rubella, Epstein Barr virus, cytomegalovirus, toxoplasma, varicella zoster virus, parvovirus B19, herpes simplex virus, and parainfluenza virus. APECED-related autoantibodies were detected by indirect immunofluorescence or complement fixation or enzyme- linked immunosorbent assay or radioimmunoassay. Resistance to Fas-induced apoptosis was evaluated on peripheral blood mononuclear cells (PBMC) activated with phytohemoagglutinin, the number of TCD4+CD25+ regulatory cells (Treg) was evaluated through flow-cytometry and natural killer (NK) activity through Wallac method. Perforin (PRF1) was amplified by PCR and sequenced. RESULTS No difference was observed between the siblings in common infectious triggers, extent of Fas-induced apoptosis, NK-cell activity and PRF1 sequence, the number of Tregs and HLA haplotypes. CONCLUSION Although APECED is a monogenic disease, its expressivity may be extremely different even in the same family. This variability cannot be explained by common triggering infectious agents or functional alterations of mechanisms governing peripheral tolerance.
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Affiliation(s)
- D Capalbo
- Department of Pediatrics, Federico II University, Naples, Italy
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Mutational robustness of an RNA virus influences sensitivity to lethal mutagenesis. J Virol 2011; 86:2869-73. [PMID: 22190724 DOI: 10.1128/jvi.05712-11] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023] Open
Abstract
The ability to extinguish a viral population of fixed reproductive capacity by causing small changes in the mutation rate is referred to as lethal mutagenesis and is a corollary of population genetics theory. Here we show that coxsackievirus B3 (CVB3) exhibits reduced mutational robustness relative to poliovirus, manifesting in enhanced sensitivity of CVB3 to lethal mutagens that is dependent on the size of the viral population. We suggest that mutational robustness may be a useful measure of the sensitivity of a virus to lethal mutagenesis.
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Experimental SSM-CVB3 infection in macaques. Exp Mol Pathol 2011; 92:131-9. [PMID: 22079478 DOI: 10.1016/j.yexmp.2011.10.008] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2011] [Revised: 10/01/2011] [Accepted: 10/24/2011] [Indexed: 12/17/2022]
Abstract
OBJECTIVE To evaluate the pathogenicity of SSM-CVB3 in a macaque model. METHODS The clinical symptoms of macaques were recorded; hematological, biochemical and histopathological evaluations were completed; viral titers and neutralization titers (NT-titers) in sera were tested; and the mRNA levels of SSM-CVB3, coxsackievirus and adenovirus receptor (CAR) and decay accelerating factor (DAF) were determined. RESULTS After SSM-CVB3 infection, the macaques showed a lack of activity, a poor appetite, a higher body temperature, and severe diarrhea. The macaques also developed hematuria and albuminuria at 4 to 10 days post-inoculation. Virus titers (5.1-6.5 LogTCID(50)/mL) were higher at 6 to 10 days post-inoculation, and NT-titers (6.5-7.3 Log2) reached plateaus at 8 to 14 days post-inoculation. The infected macaques developed serious anemia with decreased RBC and WBC, but the percentages of LYM were increased. The levels of CK, CK-MB, AST and ALT in the sera were 84-169 U/L, 87.6-271.1 U/L, 43-87 U/L and 43-82 U/L, respectively, and all of those were higher than normal. Histological analysis showed obvious cardiac, hepatic and renal damages in the infected macaques and the mRNA contents of SSM-CVB3, CAR and DAF in the heart, liver and kidneys of infected macaques were higher (P<0.05). CONCLUSION This was the first report on experimental SSM-CVB3 infections in macaques with serious hepatic and renal damage, except for myocarditis. The information obtained from this study suggests that the SSM-CVB3 strain and this macaque model could be used for studying CVB3-induced cardiac, hepatic or renal diseases.
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Liu L, Zhao H, Zhang Y, Wang J, Che Y, Dong C, Zhang X, Na R, Shi H, Jiang L, Wang L, Xie Z, Cui P, Xiong X, Liao Y, Zhao S, Gao J, Tang D, Li Q. Neonatal rhesus monkey is a potential animal model for studying pathogenesis of EV71 infection. Virology 2011; 412:91-100. [PMID: 21262515 DOI: 10.1016/j.virol.2010.12.058] [Citation(s) in RCA: 60] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2010] [Revised: 11/30/2010] [Accepted: 12/30/2010] [Indexed: 11/28/2022]
Abstract
Data from limited autopsies of human patients demonstrate that pathological changes in EV71-infected fatal cases are principally characterized by clear inflammatory lesions in different parts of the CNS; nearly identical changes were found in murine, cynomolgus and rhesus monkey studies which provide evidence of using animal models to investigate the mechanisms of EV71 pathogenesis. Our work uses neonatal rhesus monkeys to investigate a possible model of EV71 pathogenesis and concludes that this model could be applied to provide objective indicators which include clinical manifestations, virus dynamic distribution and pathological changes for observation and evaluation in interpreting the complete process of EV71 infection. This induced systemic infection and other collected indicators in neonatal monkeys could be repeated; the transmission appears to involve infecting new monkeys by contact with feces of infected animals. All data presented suggest that the neonatal rhesus monkey model could shed light on EV71 infection process and pathogenesis.
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Affiliation(s)
- Longding Liu
- Institute of Medical Biology, Chinese Academy of Medicine Science and Peking Union Medical College, 379 Jiaoling Road, Kunming, Yunnan, PR China
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Coxsackievirus infection induces autophagy-like vesicles and megaphagosomes in pancreatic acinar cells in vivo. J Virol 2010; 84:12110-24. [PMID: 20861268 DOI: 10.1128/jvi.01417-10] [Citation(s) in RCA: 127] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
Autophagy can play an important part in protecting host cells during virus infection, and several viruses have developed strategies by which to evade or even exploit this homeostatic pathway. Tissue culture studies have shown that poliovirus, an enterovirus, modulates autophagy. Herein, we report on in vivo studies that evaluate the effects on autophagy of coxsackievirus B3 (CVB3). We show that in pancreatic acinar cells, CVB3 induces the formation of abundant small autophagy-like vesicles and permits amphisome formation. However, the virus markedly, albeit incompletely, limits the fusion of autophagosomes (and/or amphisomes) with lysosomes, and, perhaps as a result, very large autophagy-related structures are formed within infected cells; we term these structures megaphagosomes. Ultrastructural analyses confirmed that double-membraned autophagy-like vesicles were present in infected pancreatic tissue and that the megaphagosomes were related to the autophagy pathway; they also revealed a highly organized lattice, the individual components of which are of a size consistent with CVB RNA polymerase; we suggest that this may represent a coxsackievirus replication complex. Thus, these in vivo studies demonstrate that CVB3 infection dramatically modifies autophagy in infected pancreatic acinar cells.
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