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Tsay GJ, Zouali M. Cellular pathways and molecular events that shape autoantibody production in COVID-19. J Autoimmun 2024; 147:103276. [PMID: 38936147 DOI: 10.1016/j.jaut.2024.103276] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2023] [Revised: 05/26/2024] [Accepted: 06/18/2024] [Indexed: 06/29/2024]
Abstract
A hallmark of COVID-19 is the variety of complications that follow SARS-CoV-2 infection in some patients, and that target multiple organs and tissues. Also remarkable are the associations with several auto-inflammatory disorders and the presence of autoantibodies directed to a vast array of antigens. The processes underlying autoantibody production in COVID-19 have not been completed deciphered. Here, we review mechanisms involved in autoantibody production in COVID-19, multisystem inflammatory syndrome in children, and post-acute sequelae of COVID19. We critically discuss how genomic integrity, loss of B cell tolerance to self, superantigen effects of the virus, and extrafollicular B cell activation could underly autoantibody proaction in COVID-19. We also offer models that may account for the pathogenic roles of autoantibodies in the promotion of inflammatory cascades, thromboembolic phenomena, and endothelial and vascular deregulations.
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Affiliation(s)
- Gregory J Tsay
- Division of Immunology and Rheumatology, Department of Internal Medicine, China Medical University Hospital, Taichung, Taiwan; College of Medicine, China Medical University, Taichung, Taiwan
| | - Moncef Zouali
- Graduate Institute of Biomedical Sciences, China Medical University, Taichung, Taiwan.
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2
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Denner J. Xenotransplantation of pig islet cells: Potential adverse impact of virus infections on their functionality and insulin production. Xenotransplantation 2022; 30:e12789. [PMID: 36495163 DOI: 10.1111/xen.12789] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2022] [Revised: 09/09/2022] [Accepted: 10/26/2022] [Indexed: 12/14/2022]
Affiliation(s)
- Joachim Denner
- Institute of Virology Free University Berlin Berlin Germany
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Poma AM, Hammerstad SS, Genoni A, Basolo A, Dahl-Jorgensen K, Toniolo A. Immune Transcriptome of Cells Infected with Enterovirus Strains Obtained from Cases of Autoimmune Thyroid Disease. Microorganisms 2021; 9:microorganisms9040876. [PMID: 33921891 PMCID: PMC8073039 DOI: 10.3390/microorganisms9040876] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2021] [Revised: 04/15/2021] [Accepted: 04/16/2021] [Indexed: 11/16/2022] Open
Abstract
Background: Hashimoto’s thyroiditis and Graves’ disease are autoimmune thyroid disorders (AITD) of unknown origin. Enterovirus (EV) infection of thyroid cells has been implicated as a possible initiator of cell damage and of organ-specific autoimmunity. We asked whether persistent infection of human epithelial cells with EV strains obtained from thyroid tissue of AITD patients could be associated with transcriptional changes capable of fostering immunopathology. Methods: EV isolates obtained from thyroid tissue of AITD cases were used to infect the AV3 epithelial cell line. AV3 cells incubated with a virus-free medium from thyroid tissue of subjects without evidence of thyroid autoimmunity were used as uninfected controls. Transcripts of immune-related genes were compared in infected vs. uninfected cells. Results: The EV genome and antigens were detected only in the cells exposed to AITD-derived virus isolates, not in control cells. Persistent EV infection, while suppressing transcription of several type I IFN and cytokine determinants, was associated with enhanced transcription of NFKB1/RELA, IFNAR1, JAK1/STAT1, i.e., the determinants that play key immunologic roles. Infection also led to upregulation of the CCL2 chemokine and the IL-18 pro-inflammatory interleukin. Conclusion: As in the case of EV strains obtained from autoimmune diabetes, results show that the EV strains that are present in the thyroid of AITD cases do repress IFN and cytokine pathways. JAK1/STAT1 upregulation supports activation of TLR pathways and aberrant T cell signaling. In the early phases of AITD, our results highlight the potential benefit of interventions aimed at blocking the viral infection and easing the inflammatory response.
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Affiliation(s)
- Anello Marcello Poma
- Department of Surgical, Medical, Molecular Pathology and Clinical Area, University of Pisa, 56126 Pisa, Italy
- Correspondence: ; Tel.: +39-050-993260
| | - Sarah Salehi Hammerstad
- Department of Pediatric Medicine, Oslo University Hospital, 0450 Oslo, Norway; (S.S.H.); (K.D.-J.)
- Specialist Center Pilestredet Park, Pilestredet Park 12.A, 0176 Oslo, Norway
| | - Angelo Genoni
- Medical Microbiology, Department of Biotechnology and Life Sciences, University of Insubria, 21100 Varese, Italy;
| | - Alessio Basolo
- Department of Clinical and Experimental Medicine, University of Pisa, 56126 Pisa, Italy;
| | - Knut Dahl-Jorgensen
- Department of Pediatric Medicine, Oslo University Hospital, 0450 Oslo, Norway; (S.S.H.); (K.D.-J.)
- Faculty of Medicine, The University of Oslo, 0316 Oslo, Norway
| | - Antonio Toniolo
- Global Virus Network, University of Insubria, 21100 Varese, Italy;
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Battaglia M, Buckner JH, Levings MK, Richardson SJ, Wong FS, Tree TI. Identifying the 'Achilles heel' of type 1 diabetes. Clin Exp Immunol 2021; 204:167-178. [PMID: 33368173 DOI: 10.1111/cei.13570] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2020] [Revised: 11/16/2020] [Accepted: 11/18/2020] [Indexed: 12/22/2022] Open
Abstract
When Thetis dipped her son Achilles into the River Styx to make him immortal, she held him by the heel, which was not submerged, and thus created a weak spot that proved deadly for Achilles. Millennia later, Achilles heel is part of today's lexicon meaning an area of weakness or a vulnerable spot that causes failure. Also implied is that an Achilles heel is often missed, forgotten or under-appreciated until it is under attack, and then failure is fatal. Paris killed Achilles with an arrow 'guided by the Gods'. Understanding the pathogenesis of type 1 diabetes (T1D) in order to direct therapy for prevention and treatment is a major goal of research into T1D. At the International Congress of the Immunology of Diabetes Society, 2018, five leading experts were asked to present the case for a particular cell/element that could represent 'the Achilles heel of T1D'. These included neutrophils, B cells, CD8+ T cells, regulatory CD4+ T cells, and enteroviruses, all of which have been proposed to play an important role in the pathogenesis of type 1 diabetes. Did a single entity emerge as 'the' Achilles heel of T1D? The arguments are summarized here, to make this case.
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Affiliation(s)
- M Battaglia
- San Raffaele Diabetes Research Institute, IRCCS San Raffaele Hospital, Milan, Italy
| | - J H Buckner
- Translational Research Program, Benaroya Research Institute at Virginia Mason, Seattle, WA, USA
| | - M K Levings
- BC Children's Hospital Research Institute, Vancouver, BC, Canada
| | - S J Richardson
- Institute of Biomedical and Clinical Science, University of Exeter Medical School, Exeter, UK
| | - F S Wong
- Division of Infection and Immunity, Cardiff University School of Medicine, Cardiff, UK
| | - T I Tree
- Department of Immunobiology, School of Immunology and Microbial Sciences (SIMS), King's College London, London, UK.,NIHR Biomedical Research Centre, Guy's and St Thomas' NHS Foundation Trust and King's College London, London, UK
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Extracellular Vesicles Released by Enterovirus-Infected EndoC-βH1 Cells Mediate Non-Lytic Viral Spread. Microorganisms 2020; 8:microorganisms8111753. [PMID: 33171580 PMCID: PMC7695210 DOI: 10.3390/microorganisms8111753] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2020] [Revised: 10/31/2020] [Accepted: 11/06/2020] [Indexed: 12/28/2022] Open
Abstract
While human enteroviruses are generally regarded as a lytic virus, and persistent non-cytolytic enterovirus infection in pancreatic beta cells has been suspected of playing a role in type 1 diabetes pathogenesis. However, it is still unclear how enteroviruses could exit the pancreatic beta cell in a non-lytic manner. This study aimed to investigate the role of beta cell-derived extracellular vesicles (EVs) in the non-lytic enteroviral spread and infection. Size-exclusion chromatography and antibody-based immunoaffinity purification were used to isolate EVs from echovirus 16-infected human beta EndoC-βH1 cells. EVs were then characterized using transmission electron microscopy and Multiplex Bead-Based Flow Cytometry Assay. Virus production and release were quantified by 50% cell culture infectious dose (CCID50) assay and qRT-PCR. Our results showed that EVs from echovirus 16-infected EndoC-βH1 cells harbor infectious viruses and promote their spread during the pre-lytic phase of infection. Furthermore, the EVs-mediated infection was not inhibited by virus-specific neutralizing antibodies. In summary, this study demonstrated that enteroviruses could exit beta cells non-lytically within infectious EVs, thereby thwarting the access of neutralizing antibodies to viral particles. These data suggest that enterovirus transmission through EVs may contribute to viral dissemination and immune evasion in persistently infected beta cells.
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Wernersson A, Sarmiento L, Cowan E, Fex M, Cilio CM. Human enteroviral infection impairs autophagy in clonal INS(832/13) cells and human pancreatic islet cells. Diabetologia 2020; 63:2372-2384. [PMID: 32676816 PMCID: PMC7527364 DOI: 10.1007/s00125-020-05219-z] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/26/2020] [Accepted: 05/07/2020] [Indexed: 12/22/2022]
Abstract
AIM/HYPOTHESIS Human enteroviral infections are suggested to be associated with type 1 diabetes. However, the mechanism by which enteroviruses can trigger disease remains unknown. The present study aims to investigate the impact of enterovirus on autophagy, a cellular process that regulates beta cell homeostasis, using the clonal beta cell line INS(832/13) and human islet cells as in vitro models. METHODS INS(832/13) cells and human islet cells were infected with a strain of echovirus 16 (E16), originally isolated from the stool of a child who developed type 1 diabetes-associated autoantibodies. Virus production and release was determined by 50% cell culture infectious dose (CCID50) assay and FACS analysis. The occurrence of autophagy, autophagosomes, lysosomes and autolysosomes was detected by western blot, baculoviral-mediated expression of microtubule-associated protein light chain 3 (LC3)II-GFP and LysoTracker Red, and quantified by Cellomics ArrayScan. Autophagy was also monitored with a Cyto-ID detection kit. Nutrient deprivation (low glucose [2.8 mmol/l]), amino acid starvation (Earle's Balanced Salt Solution [EBSS]) and autophagy-modifying agents (rapamycin and chloroquine) were used in control experiments. Insulin secretion and the expression of autophagy-related (Atg) genes and genes involved in autophagosome-lysosome fusion were determined. RESULTS E16-infected INS(832/13) cells displayed an accumulation of autophagosomes, compared with non-treated (NT) cells (grown in complete RPMI1640 containing 11.1 mmol/l glucose) (32.1 ± 1.7 vs 21.0 ± 1.2 μm2/cell; p = 0.05). This was accompanied by increased LC3II ratio both in E16-infected cells grown in low glucose (LG) (2.8 mmol/l) (0.42 ± 0.03 vs 0.11 ± 0.04 (arbitrary units [a.u.]); p < 0.0001) and grown in media containing 11.1 mmol/l glucose (0.37 ± 0.016 vs 0.05 ± 0.02 (a.u.); p < 0.0001). Additionally, p62 accumulated in cells after E16 infection when grown in LG (1.23 ± 0.31 vs 0.36 ± 0.12 (a.u.); p = 0.012) and grown in media containing 11.1 mmol/l glucose (1.79 ± 0.39 vs 0.66 ± 0.15 (a.u.); p = 0.0078). mRNA levels of genes involved in autophagosome formation and autophagosome-lysosome fusion remained unchanged in E16-infected cells, except Atg7, which was significantly increased when autophagy was induced by E16 infection, in combination with LG (1.48 ± 0.08-fold; p = 0.02) and at 11.1 mmol/l glucose (1.26 ± 0.2-fold; p = 0.001), compared with NT controls. Moreover, autophagosomes accumulated in E16-infected cells to the same extent as when cells were treated with the lysosomal inhibitor, chloroquine, clearly indicating that autophagosome turnover was blocked. Upon infection, there was an increased viral titre in the cell culture supernatant and a marked reduction in glucose-stimulated insulin secretion (112.9 ± 24.4 vs 209.8 ± 24.4 ng [mg protein]-1 h-1; p = 0.006), compared with uninfected controls, but cellular viability remained unaffected. Importantly, and in agreement with the observations for INS(832/13) cells, E16 infection impaired autophagic flux in primary human islet cells (46.5 ± 1.6 vs 34.4 ± 2.1 μm2/cell; p = 0.01). CONCLUSIONS/INTERPRETATION Enteroviruses disrupt beta cell autophagy by impairing the later stages of the autophagic pathway, without influencing expression of key genes involved in core autophagy machinery. This results in increased viral replication, non-lytic viral spread and accumulation of autophagic structures, all of which may contribute to beta cell demise and type 1 diabetes. Graphical abstract.
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Affiliation(s)
- Anya Wernersson
- Unit of Molecular Metabolism, Department of Clinical Sciences, Lund University Diabetes Centre, Clinical Research Center 91:10, Jan Waldenströmsgata 35, SE-21428, Malmö, Sweden
| | - Luis Sarmiento
- Immunovirology Unit, Department of Clinical Sciences, Lund University Diabetes Centre, Malmö, Sweden
| | - Elaine Cowan
- Unit of Molecular Metabolism, Department of Clinical Sciences, Lund University Diabetes Centre, Clinical Research Center 91:10, Jan Waldenströmsgata 35, SE-21428, Malmö, Sweden
| | - Malin Fex
- Unit of Molecular Metabolism, Department of Clinical Sciences, Lund University Diabetes Centre, Clinical Research Center 91:10, Jan Waldenströmsgata 35, SE-21428, Malmö, Sweden.
| | - Corrado M Cilio
- Immunovirology Unit, Department of Clinical Sciences, Lund University Diabetes Centre, Malmö, Sweden
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Enteroviral infections in the pathogenesis of type 1 diabetes: new insights for therapeutic intervention. Curr Opin Pharmacol 2018; 43:11-19. [PMID: 30064099 PMCID: PMC6294842 DOI: 10.1016/j.coph.2018.07.006] [Citation(s) in RCA: 44] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2018] [Revised: 07/07/2018] [Accepted: 07/16/2018] [Indexed: 12/25/2022]
Abstract
Enteroviral infection has been long-associated with type 1 diabetes in epidemiological studies. β-Cells express a specific enteroviral receptor isoform, CAR-SIV, mainly on secretory granules. β-Cells respond to enteroviruses by allowing the establishment of a persistent infection. Enteroviral vaccines are under development that might be effective in type 1 diabetes.
The development of islet autoimmunity and type 1 diabetes has long been linked with enteroviral infection but a causal relationship has proven hard to establish. This is partly because much of the epidemiological evidence derives from studies of neutralising antibody generation in blood samples while less attention has been paid to the pancreatic beta cell as a site of infection. Nevertheless, recent studies have revealed that beta cells express specific enteroviral receptors and that they can sustain a productive enteroviral infection. Importantly, they can also mount antiviral responses which attenuate viral replication and may favour the establishment of a persistent enteroviral infection. Together, these responses combine to create the Trojan horse by which enteroviruses might precipitate islet autoimmunity.
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Sioofy-Khojine AB, Lehtonen J, Nurminen N, Laitinen OH, Oikarinen S, Huhtala H, Pakkanen O, Ruokoranta T, Hankaniemi MM, Toppari J, Vähä-Mäkilä M, Ilonen J, Veijola R, Knip M, Hyöty H. Coxsackievirus B1 infections are associated with the initiation of insulin-driven autoimmunity that progresses to type 1 diabetes. Diabetologia 2018; 61:1193-1202. [PMID: 29404673 DOI: 10.1007/s00125-018-4561-y] [Citation(s) in RCA: 62] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/25/2017] [Accepted: 12/22/2017] [Indexed: 12/17/2022]
Abstract
AIMS/HYPOTHESIS Islet autoimmunity usually starts with the appearance of autoantibodies against either insulin (IAA) or GAD65 (GADA). This categorises children with preclinical type 1 diabetes into two immune phenotypes, which differ in their genetic background and may have different aetiology. The aim was to study whether Coxsackievirus group B (CVB) infections, which have been linked to the initiation of islet autoimmunity, are associated with either of these two phenotypes in children with HLA-conferred susceptibility to type 1 diabetes. METHODS All samples were from children in the Finnish Type 1 Diabetes Prediction and Prevention (DIPP) study. Individuals are recruited to the DIPP study from the general population of new-born infants who carry defined HLA genotypes associated with susceptibility to type 1 diabetes. Our study cohort included 91 children who developed IAA and 78 children who developed GADA as their first appearing single autoantibody and remained persistently seropositive for islet autoantibodies, along with 181 and 151 individually matched autoantibody negative control children, respectively. Seroconversion to positivity for neutralising antibodies was detected as the surrogate marker of CVB infections in serial follow-up serum samples collected before and at the appearance of islet autoantibodies in each individual. RESULTS CVB1 infections were associated with the appearance of IAA as the first autoantibody (OR 2.4 [95% CI 1.4, 4.2], corrected p = 0.018). CVB5 infection also tended to be associated with the appearance of IAA, however, this did not reach statistical significance (OR 2.3, [0.7, 7.5], p = 0.163); no other CVB types were associated with increased risk of IAA. Children who had signs of a CVB1 infection either alone or prior to infections by other CVBs were at the highest risk for developing IAA (OR 5.3 [95% CI 2.4, 11.7], p < 0.001). None of the CVBs were associated with the appearance of GADA. CONCLUSIONS/INTERPRETATION CVB1 infections may contribute to the initiation of islet autoimmunity being particularly important in the insulin-driven autoimmune process.
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Affiliation(s)
- Amir-Babak Sioofy-Khojine
- Department of Virology, Faculty of Medicine and Life Sciences, University of Tampere, PL 100, 33014 Tampereen yliopisto, Tampere, Finland.
| | - Jussi Lehtonen
- Department of Virology, Faculty of Medicine and Life Sciences, University of Tampere, PL 100, 33014 Tampereen yliopisto, Tampere, Finland
| | - Noora Nurminen
- Department of Virology, Faculty of Medicine and Life Sciences, University of Tampere, PL 100, 33014 Tampereen yliopisto, Tampere, Finland
| | - Olli H Laitinen
- Department of Virology, Faculty of Medicine and Life Sciences, University of Tampere, PL 100, 33014 Tampereen yliopisto, Tampere, Finland
- Vactech Ltd, Tampere, Finland
| | - Sami Oikarinen
- Department of Virology, Faculty of Medicine and Life Sciences, University of Tampere, PL 100, 33014 Tampereen yliopisto, Tampere, Finland
- Fimlab laboratories, Pirkanmaa Hospital District, Tampere, Finland
| | - Heini Huhtala
- Faculty of Social Sciences, University of Tampere, Tampere, Finland
| | | | | | - Minna M Hankaniemi
- Vactech Ltd, Tampere, Finland
- Biomeditech, University of Tampere, Tampere, Finland
| | - Jorma Toppari
- Institute of Biomedicine, Research Centre of Integrative Physiology and Pharmacology, University of Turku, Turku, Finland
- Department of Paediatrics, Turku University Hospital, Turku, Finland
| | - Mari Vähä-Mäkilä
- Institute of Biomedicine, Research Centre of Integrative Physiology and Pharmacology, University of Turku, Turku, Finland
- Department of Paediatrics, Turku University Hospital, Turku, Finland
| | - Jorma Ilonen
- Immunogenetics Laboratory, Institute of Biomedicine, University of Turku, Turku, Finland
- Department of Clinical Microbiology, Turku University Hospital, Turku, Finland
| | - Riitta Veijola
- Department of Paediatrics, PEDEGO Research Unit, Medical Research Centre, Oulu University, Hospital and University of Oulu, Oulu, Finland
| | - Mikael Knip
- Children's Hospital, University of Helsinki and Helsinki University Hospital, Helsinki, Finland
- Research Programs Unit, Diabetes and Obesity, University of Helsinki, Helsinki, Finland
- Tampere Centre for Child Health Research, Tampere University Hospital, Tampere, Finland
- Folkhälsan Research Centre, Helsinki, Finland
| | - Heikki Hyöty
- Department of Virology, Faculty of Medicine and Life Sciences, University of Tampere, PL 100, 33014 Tampereen yliopisto, Tampere, Finland
- Fimlab laboratories, Pirkanmaa Hospital District, Tampere, Finland
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Brooks WH. Viral Impact in Autoimmune Diseases: Expanding the "X Chromosome-Nucleolus Nexus" Hypothesis. Front Immunol 2017; 8:1657. [PMID: 29234321 PMCID: PMC5712313 DOI: 10.3389/fimmu.2017.01657] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2017] [Accepted: 11/13/2017] [Indexed: 12/19/2022] Open
Abstract
Viruses are suspected of significant roles in autoimmune diseases but the mechanisms are unclear. We get some insight by considering demands a virus places on host cells. Viruses not only require production of their own proteins, RNA and/or DNA, but also production of additional cellular machinery, such as ribosomes, to handle the increased demands. Since the nucleolus is a major site of RNA processing and ribonucleoprotein assembly, nucleoli are targeted by viruses, directly when viral RNA and proteins enter the nucleolus and indirectly when viruses induce increased expression of cellular polyamine genes. Polyamines are at high levels in nucleoli to assist in RNA folding. The size and activity of nucleoli increase directly with increases in polyamines. Nucleolar expansion due to abnormal increases in polyamines could disrupt nearby chromatin, such as the inactive X chromosome, leading to expression of previously sequestered DNA. Sudden expression of a large concentration of Alu elements from the disrupted inactive X can compete with RNA transcripts containing intronic Alu sequences that normally maintain nucleolar structural integrity. Such disruption of nucleolar activity can lead to misfolded RNAs, misassembled ribonucleoprotein complexes, and fragmentation of the nucleolus. Many autoantigens in lupus are, at least transiently, components of the nucleolus. Considering these effects of viruses, the “X chromosome–nucleolus nexus” hypothesis, which proposed disruption of the inactive X by the nucleolus during stress, is now expanded here to propose subsequent disruption of the nucleolus by previously sequestered Alu elements, which can fragment the nucleolus, leading to generation of autoantigens.
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Affiliation(s)
- Wesley H Brooks
- Department of Chemistry, University of South Florida, Tampa, FL, United States
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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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RIG-I inhibits pancreatic β cell proliferation through competitive binding of activated Src. Sci Rep 2016; 6:28914. [PMID: 27349479 PMCID: PMC4923948 DOI: 10.1038/srep28914] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2016] [Accepted: 06/10/2016] [Indexed: 02/06/2023] Open
Abstract
Nutrition is a necessary condition for cell proliferation, including pancreatic β cells; however, over-nutrition, and the resulting obesity and glucolipotoxicity, is a risk factor for the development of Type 2 diabetes mellitus (DM), and causes inhibition of pancreatic β-cells proliferation and their loss of compensation for insulin resistance. Here, we showed that Retinoic acid (RA)-inducible gene I (RIG-I) responds to nutrient signals and induces loss of β cell mass through G1 cell cycle arrest. Risk factors for type 2 diabetes (e.g., glucolipotoxicity, TNF-α and LPS) activate Src in pancreatic β cells. Elevated RIG-I modulated the interaction of activated Src and STAT3 by competitive binding to STAT3. Elevated RIG-I downregulated the transcription of SKP2, and increased the stability and abundance of P27 protein in a STAT3-dependent manner, which was associated with inhibition of β cell growth elicited by Src. These results supported a role for RIG-I in β cell mass loss under conditions of metabolic surplus and suggested that RIG-I-induced blocking of Src/STAT3 signalling might be involved in G1 phase cycle arrest through the Skp2/P27 pathway in pancreatic β cells.
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12
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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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Smura T, Natri O, Ylipaasto P, Hellman M, Al-Hello H, Piemonti L, Roivainen M. Enterovirus strain and type-specific differences in growth kinetics and virus-induced cell destruction in human pancreatic duct epithelial HPDE cells. Virus Res 2015; 210:188-97. [DOI: 10.1016/j.virusres.2015.08.003] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2015] [Revised: 07/31/2015] [Accepted: 08/05/2015] [Indexed: 12/16/2022]
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Wu J, Shen L, Chen J, Xu H, Mao L. The role of microRNAs in enteroviral infections. Braz J Infect Dis 2015; 19:510-6. [PMID: 26342975 PMCID: PMC9427576 DOI: 10.1016/j.bjid.2015.06.011] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2015] [Revised: 05/29/2015] [Accepted: 06/04/2015] [Indexed: 01/22/2023] Open
Abstract
The genus Enterovirus, a member of the Picornavirus family, are RNA viruses that can cause poliomyelitis, hand-food-mouth disease, viral meningitis or meningoencephalitis, viral myocarditis and so on. MicroRNAs are a class of highly conserved, small noncoding RNAs recognized as important regulators of gene expression. Recent studies found that MicroRNAs play a significant role in the infection of Enterovirus, such as enterovirus 71, coxsackievirus B3 and other Enterovirus. Enteroviral infection can alter the expression of cellular MicroRNAs, and cellular MicroRNAs can modulate viral pathogenesis and replication by regulating the expression level of viral or host's genes. Herein, this review summarizes the role of MicroRNAs in enteroviral infection.
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Affiliation(s)
- Jing Wu
- School of Medicine, Jiangsu University, Zhenjiang, Jiangsu Province, China
| | - Li Shen
- Department of Clinical Laboratory, Zhenjiang Center for Disease Control and Prevention, Zhenjiang, Jiangsu Province, China
| | - Jianguo Chen
- Department of Clinical Laboratory, Zhenjiang First People's Hospital, Jiangsu Province, China
| | - Huaxi Xu
- School of Medicine, Jiangsu University, Zhenjiang, Jiangsu Province, China
| | - Lingxiang Mao
- Department of Clinical Laboratory, Zhenjiang Center for Disease Control and Prevention, Zhenjiang, Jiangsu Province, China; School of Medicine, Jiangsu University, Zhenjiang, Jiangsu Province, China.
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Fichna M, Żurawek M, Fichna P, Januszkiewicz-Lewandowska D, Ruchała M, Nowak J. Polymorphisms of the Toll-Like Receptor-3 Gene in Autoimmune Adrenal Failure and Type 1 Diabetes in Polish Patients. Arch Immunol Ther Exp (Warsz) 2015; 64:83-7. [PMID: 26318769 PMCID: PMC4713709 DOI: 10.1007/s00005-015-0360-z] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2015] [Accepted: 06/08/2015] [Indexed: 12/16/2022]
Abstract
Infectious agents are plausible environmental triggers for autoimmunity in genetically susceptible individuals. Polymorphic variants of genes implicated in innate immunity may affect immune responses and hence promote auto-aggressive reactions. Genes such as Toll-like receptor-3 (TLR3), which participate in recognizing conserved foreign molecules and mounting the first line of defence against viral infections, are promising functional candidates in autoimmune conditions. We investigated the association of the TLR3 variants, rs13126816 and rs3775291, with the autoimmune endocrine disorders, Addison's disease (AD) and type 1 diabetes (T1D) in the Polish population. The study comprised 168 AD patients, 524 individuals with T1D and 592 healthy controls. Genotyping was performed by real-time PCR. Distribution of the TLR3 genotypes and alleles did not reveal significant differences between patients and controls (p > 0.05). No effect on age at disease onset was found in affected cohorts. This analysis does not support an association between TLR3 variants and the risk for autoimmune destruction of the adrenal cortex and beta cells. However, innate immunity merits further studies in autoimmune endocrine conditions.
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Affiliation(s)
- Marta Fichna
- Institute of Human Genetics, Polish Academy of Sciences, Strzeszynska 32, 60-479, Poznan, Poland. .,Department of Endocrinology, Metabolism and Internal Medicine, Poznan University of Medical Sciences, Poznan, Poland. .,Department of Clinical Immunology, Poznan University of Medical Sciences, Poznan, Poland.
| | - Magdalena Żurawek
- Institute of Human Genetics, Polish Academy of Sciences, Strzeszynska 32, 60-479, Poznan, Poland
| | - Piotr Fichna
- Department of Paediatric Diabetes and Obesity, Poznan University of Medical Sciences, Poznan, Poland
| | | | - Marek Ruchała
- Department of Endocrinology, Metabolism and Internal Medicine, Poznan University of Medical Sciences, Poznan, Poland
| | - Jerzy Nowak
- Institute of Human Genetics, Polish Academy of Sciences, Strzeszynska 32, 60-479, Poznan, Poland
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Schneider DA, von Herrath MG. Potential viral pathogenic mechanism in human type 1 diabetes. Diabetologia 2014; 57:2009-18. [PMID: 25073445 PMCID: PMC4153966 DOI: 10.1007/s00125-014-3340-7] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/29/2014] [Accepted: 06/09/2014] [Indexed: 12/15/2022]
Abstract
In type 1 diabetes, as a result of as yet unknown triggering events, auto-aggressive CD8(+) T cells, together with a significant number of other inflammatory cells, including CD8(+) T lymphocytes with unknown specificity, infiltrate the pancreas, leading to insulitis and destruction of the insulin-producing beta cells. Type 1 diabetes is a multifactorial disease caused by an interactive combination of genetic and environmental factors. Viruses are major environmental candidates with known potential effects on specific key points in the pathogenesis of type 1 diabetes and recent findings seem to confirm this presumption. However, we still lack well-grounded mechanistic explanations for how exactly viruses may influence type 1 diabetes aetiology. In this review we provide a summary of experimentally defined viral mechanisms potentially involved in the ontology of type 1 diabetes and discuss some novel hypotheses of how viruses may affect the initiation and natural history of the disease.
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Affiliation(s)
- Darius A. Schneider
- La Jolla Institute for Allergy and Immunology, 9420 Athena Circle, La Jolla, CA 92037 USA
- Department of Medicine, UC San Diego, La Jolla, CA USA
| | - Matthias G. von Herrath
- La Jolla Institute for Allergy and Immunology, 9420 Athena Circle, La Jolla, CA 92037 USA
- Novo Nordisk Type 1 Diabetes Research Center, Seattle, WA 98109 USA
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