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Salaun E, Drory S, Coté M, Tremblay V, Bédard E, Steinberg C, Paré D, O'Connor K, Cieza T, Coté N, Poirier P, Douville P, Blais J, Desmeules P, Kalavrouziotis D, Mohammadi S, Voisine P, Bernier M, Pibarot P, Thériault S. Role of Antitroponin Antibodies and Macrotroponin in the Clinical Interpretation of Cardiac Troponin. J Am Heart Assoc 2024; 13:e035128. [PMID: 38879450 PMCID: PMC11255741 DOI: 10.1161/jaha.123.035128] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 06/19/2024]
Abstract
Cardiac troponin is extensively used as a biomarker in modern medicine due to its diagnostic capability for myocardial injury, as well as its predictive and prognostic value for cardiac diseases. However, heterophile antibodies, antitroponin antibodies, and macrotroponin complexes can be observed both in seemingly healthy individuals and patients with cardiac diseases, potentially leading to false positive or disproportionate elevation of cTn (cardiac troponin) assay results and introducing discrepancies in clinical interpretations with impact on medical management. In this review article, we describe the possible mechanisms of cTn release and the sources of variations in the assessment of circulating cTn levels. We also explore the pathophysiological mechanisms underlying antitroponin antibody development and discuss the influence exerted by macrotroponin complexes on the results of immunoassays. Additionally, we explore approaches to detect these complexes by presenting various clinical scenarios encountered in routine clinical practice. Finally, unsolved questions about the development, prevalence, and clinical significance of cardiac autoantibodies are discussed.
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Affiliation(s)
- Erwan Salaun
- Institut Universitaire de Cardiologie et de Pneumologie de QuébecUniversité LavalQuébecCanada
| | - Samuel Drory
- Institut Universitaire de Cardiologie et de Pneumologie de QuébecUniversité LavalQuébecCanada
| | - Marc‐André Coté
- Institut Universitaire de Cardiologie et de Pneumologie de QuébecUniversité LavalQuébecCanada
| | - Veronic Tremblay
- Institut Universitaire de Cardiologie et de Pneumologie de QuébecUniversité LavalQuébecCanada
| | - Elisabeth Bédard
- Institut Universitaire de Cardiologie et de Pneumologie de QuébecUniversité LavalQuébecCanada
| | - Christian Steinberg
- Institut Universitaire de Cardiologie et de Pneumologie de QuébecUniversité LavalQuébecCanada
| | - David Paré
- Institut Universitaire de Cardiologie et de Pneumologie de QuébecUniversité LavalQuébecCanada
| | - Kim O'Connor
- Institut Universitaire de Cardiologie et de Pneumologie de QuébecUniversité LavalQuébecCanada
| | - Tomas Cieza
- Institut Universitaire de Cardiologie et de Pneumologie de QuébecUniversité LavalQuébecCanada
| | - Nancy Coté
- Institut Universitaire de Cardiologie et de Pneumologie de QuébecUniversité LavalQuébecCanada
| | - Paul Poirier
- Institut Universitaire de Cardiologie et de Pneumologie de QuébecUniversité LavalQuébecCanada
- Faculty of pharmacyUniversité LavalQuébecCanada
| | - Pierre Douville
- Centre Hospitalier Universitaire de QuébecUniversité LavalQuébecCanada
| | - Jonatan Blais
- Centre Hospitalier Universitaire de QuébecUniversité LavalQuébecCanada
| | - Philippe Desmeules
- Institut Universitaire de Cardiologie et de Pneumologie de QuébecUniversité LavalQuébecCanada
- Centre Hospitalier Universitaire de QuébecUniversité LavalQuébecCanada
| | - Dimitris Kalavrouziotis
- Institut Universitaire de Cardiologie et de Pneumologie de QuébecUniversité LavalQuébecCanada
| | - Siamak Mohammadi
- Institut Universitaire de Cardiologie et de Pneumologie de QuébecUniversité LavalQuébecCanada
| | - Pierre Voisine
- Institut Universitaire de Cardiologie et de Pneumologie de QuébecUniversité LavalQuébecCanada
- Division of Cardiac SurgeryUniversity of Ottawa Heart InstituteOttawaOntarioCanada
| | - Mathieu Bernier
- Institut Universitaire de Cardiologie et de Pneumologie de QuébecUniversité LavalQuébecCanada
| | - Philippe Pibarot
- Institut Universitaire de Cardiologie et de Pneumologie de QuébecUniversité LavalQuébecCanada
| | - Sébastien Thériault
- Institut Universitaire de Cardiologie et de Pneumologie de QuébecUniversité LavalQuébecCanada
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2
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Mone K, Reddy J. The knowns and unknowns of cardiac autoimmunity in viral myocarditis. Rev Med Virol 2023; 33:e2478. [PMID: 37658748 DOI: 10.1002/rmv.2478] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2023] [Revised: 08/17/2023] [Accepted: 08/23/2023] [Indexed: 09/05/2023]
Abstract
Myocarditis can result from various infectious and non-infectious causes that can lead to dilated cardiomyopathy (DCM) and heart failure. Among the infectious causes, viruses are commonly suspected. But the challenge is our inability to demonstrate infectious viral particles during clinical presentations, partly because by that point, the viruses would have damaged the tissues and be cleared by the immune system. Therefore, viral signatures such as viral nucleic acids and virus-reactive antibodies may be the only readouts pointing to viruses as potential primary triggers of DCM. Thus, it becomes hard to explain persistent inflammatory infiltrates that might occur in individuals affected with chronic myocarditis/DCM manifesting myocardial dysfunctions. In these circumstances, autoimmunity is suspected, and antibodies to various autoantigens have been demonstrated, suggesting that immune therapies to suppress the autoimmune responses may be necessary. From this perspective, we endeavoured to determine whether or not the known viral causes are associated with development of autoimmune responses to cardiac antigens that include both cardiotropic and non-cardiotropic viruses. If so, what their nature and significance are in developing chronic myocarditis resulting from viruses as primary triggers.
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Affiliation(s)
- Kiruthiga Mone
- School of Veterinary Medicine and Biomedical Sciences, University of Nebraska-Lincoln, Lincoln, Nebraska, USA
| | - Jay Reddy
- School of Veterinary Medicine and Biomedical Sciences, University of Nebraska-Lincoln, Lincoln, Nebraska, USA
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Won T, Kalinoski HM, Wood MK, Hughes DM, Jaime CM, Delgado P, Talor MV, Lasrado N, Reddy J, Čiháková D. Cardiac myosin-specific autoimmune T cells contribute to immune-checkpoint-inhibitor-associated myocarditis. Cell Rep 2022; 41:111611. [PMID: 36351411 PMCID: PMC11108585 DOI: 10.1016/j.celrep.2022.111611] [Citation(s) in RCA: 37] [Impact Index Per Article: 18.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2022] [Revised: 08/15/2022] [Accepted: 10/14/2022] [Indexed: 11/09/2022] Open
Abstract
Immune checkpoint inhibitors (ICIs) are an effective therapy for various cancers; however, they can induce immune-related adverse events (irAEs) as a side effect. Myocarditis is an uncommon, but fatal, irAE caused after ICI treatments. Currently, the mechanism of ICI-associated myocarditis is unclear. Here, we show the development of myocarditis in A/J mice induced by anti-PD-1 monoclonal antibody (mAb) administration alone without tumor cell inoculation, immunization, or viral infection. Mice with myocarditis have increased cardiac infiltration, elevated cardiac troponin levels, and arrhythmia. Anti-PD-1 mAb treatment also causes irAEs in other organs. Autoimmune T cells recognizing cardiac myosin are activated and increased in mice with myocarditis. Notably, cardiac myosin-specific T cells are present in naive mice, showing a phenotype of antigen-experienced T cells. Collectively, we establish a clinically relevant mouse model for ICI-associated myocarditis and find a contribution of cardiac myosin-specific T cells to ICI-associated myocarditis development and pathogenesis.
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Affiliation(s)
- Taejoon Won
- Department of Pathology, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA
| | - Hannah M Kalinoski
- W. Harry Feinstone Department of Molecular Microbiology and Immunology, Johns Hopkins University Bloomberg School of Public Health, Baltimore, MD 21205, USA
| | - Megan K Wood
- W. Harry Feinstone Department of Molecular Microbiology and Immunology, Johns Hopkins University Bloomberg School of Public Health, Baltimore, MD 21205, USA
| | - David M Hughes
- Department of Chemical and Biomolecular Engineering, Johns Hopkins University Whiting School of Engineering, Baltimore, MD 21218, USA
| | - Camille M Jaime
- Graduate Program in Immunology, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA
| | - Paul Delgado
- W. Harry Feinstone Department of Molecular Microbiology and Immunology, Johns Hopkins University Bloomberg School of Public Health, Baltimore, MD 21205, USA
| | - Monica V Talor
- Department of Pathology, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA
| | - Ninaad Lasrado
- School of Veterinary Medicine and Biomedical Sciences, University of Nebraska-Lincoln, Lincoln, NE 68583, USA; Center for Virology and Vaccine Research, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA 02215, USA
| | - Jay Reddy
- School of Veterinary Medicine and Biomedical Sciences, University of Nebraska-Lincoln, Lincoln, NE 68583, USA
| | - Daniela Čiháková
- Department of Pathology, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA; W. Harry Feinstone Department of Molecular Microbiology and Immunology, Johns Hopkins University Bloomberg School of Public Health, Baltimore, MD 21205, USA.
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Ma Z, Shen Z, Gong Y, Zhou J, Chen X, Lv Q, Wang M, Chen J, Yu M, Fu G, He H, Lai D. Weighted gene co-expression network analysis identified underlying hub genes and mechanisms in the occurrence and development of viral myocarditis. ANNALS OF TRANSLATIONAL MEDICINE 2020; 8:1348. [PMID: 33313093 PMCID: PMC7723587 DOI: 10.21037/atm-20-3337] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Background Myocarditis is an inflammatory myocardial disease, which may lead to heart failure and sudden death. Despite extensive research into the pathogenesis of myocarditis, effective treatments for this condition remain elusive. This study aimed to explore the potential pathogenesis and hub genes for viral myocarditis. Methods A weighted gene co-expression network analysis (WGCNA) was performed based on the gene expression profiles derived from mouse models at different stages of viral myocarditis (GSE35182). Functional annotation was executed within the key modules. Potential hub genes were predicted based on the intramodular connectivity (IC). Finally, potential microRNAs that regulate gene expression were predicted by miRNet analysis. Results Three gene co-expression modules showed the strongest correlation with the acute or chronic disease stage. A significant positive correlation was detected between the acute disease stage and the turquoise module, the genes of which were mainly enriched in antiviral response and immune-inflammatory activation. Furthermore, a significant positive correlation and a negative correlation were identified between the chronic disease stage and the brown and yellow modules, respectively. These modules were mainly associated with the cytoskeleton, phosphorylation, cellular catabolic process, and autophagy. Subsequently, we predicted the underlying hub genes and microRNAs in the three modules. Conclusions This study revealed the main biological processes in different stages of viral myocarditis and predicted hub genes in both the acute and chronic disease stages. Our results may be helpful for developing new therapeutic targets for viral myocarditis in future research.
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Affiliation(s)
- Zetao Ma
- Key Laboratory of Cardiovascular Intervention and Regenerative Medicine of Zhejiang Province, Department of Cardiology, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Zhida Shen
- Key Laboratory of Cardiovascular Intervention and Regenerative Medicine of Zhejiang Province, Department of Cardiology, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Yingchao Gong
- Key Laboratory of Cardiovascular Intervention and Regenerative Medicine of Zhejiang Province, Department of Cardiology, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Jiaqi Zhou
- State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, National Clinical Research Center for Infectious Diseases, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Xiaoou Chen
- Key Laboratory of Cardiovascular Intervention and Regenerative Medicine of Zhejiang Province, Department of Cardiology, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Qingbo Lv
- Key Laboratory of Cardiovascular Intervention and Regenerative Medicine of Zhejiang Province, Department of Cardiology, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Meihui Wang
- Key Laboratory of Cardiovascular Intervention and Regenerative Medicine of Zhejiang Province, Department of Cardiology, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Jiawen Chen
- Key Laboratory of Cardiovascular Intervention and Regenerative Medicine of Zhejiang Province, Department of Cardiology, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Mei Yu
- Key Laboratory of Cardiovascular Intervention and Regenerative Medicine of Zhejiang Province, Department of Cardiology, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Guosheng Fu
- Key Laboratory of Cardiovascular Intervention and Regenerative Medicine of Zhejiang Province, Department of Cardiology, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Hong He
- Key Laboratory of Cardiovascular Intervention and Regenerative Medicine of Zhejiang Province, Department of Cardiology, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Dongwu Lai
- Key Laboratory of Cardiovascular Intervention and Regenerative Medicine of Zhejiang Province, Department of Cardiology, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou, China
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O’Donohoe TJ, Ketheesan N, Schrale RG. Anti-troponin antibodies following myocardial infarction. J Cardiol 2017; 69:38-45. [DOI: 10.1016/j.jjcc.2016.07.018] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/16/2016] [Revised: 07/09/2016] [Accepted: 07/22/2016] [Indexed: 12/22/2022]
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6
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Rosenspire AJ, Chen K. Anergic B Cells: Precarious On-Call Warriors at the Nexus of Autoimmunity and False-Flagged Pathogens. Front Immunol 2015; 6:580. [PMID: 26635794 PMCID: PMC4659919 DOI: 10.3389/fimmu.2015.00580] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2015] [Accepted: 10/30/2015] [Indexed: 12/25/2022] Open
Affiliation(s)
- Allen J Rosenspire
- Department of Immunology and Microbiology, Wayne State University , Detroit, MI , USA
| | - Kang Chen
- Department of Immunology and Microbiology, Wayne State University , Detroit, MI , USA ; Department of Obstetrics and Gynecology, Wayne State University , Detroit, MI , USA ; Department of Oncology, Wayne State University , Detroit, MI , USA ; Perinatology Research Branch, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health , Detroit, MI , USA ; Tumor Biology and Microenvironment Program, Barbara Ann Karmanos Cancer Institute , Detroit, MI , USA ; Mucosal Immunology Studies Team, National Institute of Allergy and Infectious Diseases, National Institutes of Health , Bethesda, MD , USA
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7
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Unresolved issues in theories of autoimmune disease using myocarditis as a framework. J Theor Biol 2014; 375:101-123. [PMID: 25484004 DOI: 10.1016/j.jtbi.2014.11.022] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2014] [Revised: 11/10/2014] [Accepted: 11/20/2014] [Indexed: 11/20/2022]
Abstract
Many theories of autoimmune disease have been proposed since the discovery that the immune system can attack the body. These theories include the hidden or cryptic antigen theory, modified antigen theory, T cell bypass, T cell-B cell mismatch, epitope spread or drift, the bystander effect, molecular mimicry, anti-idiotype theory, antigenic complementarity, and dual-affinity T cell receptors. We critically review these theories and relevant mathematical models as they apply to autoimmune myocarditis. All theories share the common assumption that autoimmune diseases are triggered by environmental factors such as infections or chemical exposure. Most, but not all, theories and mathematical models are unifactorial assuming single-agent causation of disease. Experimental and clinical evidence and mathematical models exist to support some aspects of most theories, but evidence/models that support one theory almost invariably supports other theories as well. More importantly, every theory (and every model) lacks the ability to account for some key autoimmune disease phenomena such as the fundamental roles of innate immunity, sex differences in disease susceptibility, the necessity for adjuvants in experimental animal models, and the often paradoxical effect of exposure timing and dose on disease induction. We argue that a more comprehensive and integrated theory of autoimmunity associated with new mathematical models is needed and suggest specific experimental and clinical tests for each major theory that might help to clarify how they relate to clinical disease and reveal how theories are related.
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8
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Abstract
In inflammatory dilated cardiomyopathy and myocarditis there is--apart from heart failure and antiarrhythmic therapies--no alternative to an aetiologically driven specific treatment. Prerequisite are noninvasive and invasive biomarkers including endomyocardial biopsy and PCR on cardiotropic agents. This review deals with the different etiologies of myocarditis and inflammatory cardiomyopathy including the genetic background, the predisposition for heart failure and inflammation. It analyses the epidemiologic shift in pathogenetic agents in the last 20 years, the role of innate and aquired immunity including the T- and B-cell driven immune responses. The phases and clinical faces of myocarditis are summarized. Up-to-date information on current treatment options starting with heart failure and antiarrhythmic therapy are provided. Although inflammation can resolve spontaneously, specific treatment directed to the causative aetiology is often required. For fulminant, acute and chronic autoreactive myocarditis immunosuppressive treatment is beneficial, while for viral cardiomyopathy and myocarditis ivIg can resolve inflammation and is as successful as interferon therapy in enteroviral and adenoviral myocarditis. For Parvo B19 and HHV6 myocarditis eradication of the virus is still a problem by any of these treatment options. Finally, the potential of stem cell therapy has to be tested in future trials. In virus-negative, autoreactive perimyocardial disease a locoregional approach with intrapericardial instillation of high local doses of triamcinolone acetate has been shown to be highly efficient and with few systemic side-effects.
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9
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Standard and etiology-directed evidence-based therapies in myocarditis: state of the art and future perspectives. Heart Fail Rev 2012; 18:761-95. [DOI: 10.1007/s10741-012-9362-7] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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10
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Abstract
Human heart failure is a disease with multifactorial causes, considerable morbidity, and high mortality. Several circulating autoantibodies, some of them being heart-specific, play a crucial role in the progression and induction of heart failure. However the precise mechanisms on how these autoantibodies perpetuate or even induce an organ specific autoimmune response are not yet fully understood. Also it is being a matter of current research to elucidate a potential pathophysiological role of the innate immune system in generating auto-reactive antibodies. In this review we will summarize the current available literature on circulating autoantibodies which are related to human heart failure. We will present clinical and animal studies that demonstrate the occurrence and pathophysiological relevance of several autoantibodies in heart failure, as well as point out biological mechanisms on molecular and cellular level. Finally the beneficial therapeutic effects of numerous clinical studies that target the humoral arm of the immune system by using either intravenous immunoglobulins and/or immunoadsorption will be critically discussed.
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Affiliation(s)
- Ziya Kaya
- From the Department of Internal Medicine III (Z.K., C.L., H.A.K.), University of Heidelberg, Germany
| | - Christoph Leib
- From the Department of Internal Medicine III (Z.K., C.L., H.A.K.), University of Heidelberg, Germany
| | - Hugo A. Katus
- From the Department of Internal Medicine III (Z.K., C.L., H.A.K.), University of Heidelberg, Germany
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11
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Maisch B, Noutsias M, Ruppert V, Richter A, Pankuweit S. Cardiomyopathies: Classification, Diagnosis, and Treatment. Heart Fail Clin 2012; 8:53-78. [DOI: 10.1016/j.hfc.2011.08.014] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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12
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Barry SP, Townsend PA. What causes a broken heart--molecular insights into heart failure. INTERNATIONAL REVIEW OF CELL AND MOLECULAR BIOLOGY 2011; 284:113-79. [PMID: 20875630 DOI: 10.1016/s1937-6448(10)84003-1] [Citation(s) in RCA: 63] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Our understanding of the molecular processes which regulate cardiac function has grown immeasurably in recent years. Even with the advent of β-blockers, angiotensin inhibitors and calcium modulating agents, heart failure (HF) still remains a seriously debilitating and life-threatening condition. Here, we review the molecular changes which occur in the heart in response to increased load and the pathways which control cardiac hypertrophy, calcium homeostasis, and immune activation during HF. These can occur as a result of genetic mutation in the case of hypertrophic cardiomyopathy (HCM) and dilated cardiomyopathy (DCM) or as a result of ischemic or hypertensive heart disease. In the majority of cases, calcineurin and CaMK respond to dysregulated calcium signaling and adrenergic drive is increased, each of which has a role to play in controlling blood pressure, heart rate, and left ventricular function. Many major pathways for pathological remodeling converge on a set of transcriptional regulators such as myocyte enhancer factor 2 (MEF2), nuclear factors of activated T cells (NFAT), and GATA4 and these are opposed by the action of the natriuretic peptides ANP and BNP. Epigenetic modification has emerged in recent years as a major influence cardiac physiology and histone acetyl transferases (HATs) and histone deacetylases (HDACs) are now known to both induce and antagonize hypertrophic growth. The newly emerging roles of microRNAs in regulating left ventricular dysfunction and fibrosis also has great potential for novel therapeutic intervention. Finally, we discuss the role of the immune system in mediating left ventricular dysfunction and fibrosis and ways this can be targeted in the setting of viral myocarditis.
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Affiliation(s)
- Seán P Barry
- Institute of Molecular Medicine, St. James's Hospital, Trinity College Dublin, Dublin 8, Ireland
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13
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The Clinical and Diagnostic Significance of Anti-myosin Autoantibodies in Cardiac Disease. Clin Rev Allergy Immunol 2011; 44:98-108. [DOI: 10.1007/s12016-010-8229-8] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
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14
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Shi Y, Fukuoka M, Li G, Liu Y, Chen M, Konviser M, Chen X, Opavsky MA, Liu PP. Regulatory T cells protect mice against coxsackievirus-induced myocarditis through the transforming growth factor beta-coxsackie-adenovirus receptor pathway. Circulation 2010; 121:2624-34. [PMID: 20530002 DOI: 10.1161/circulationaha.109.893248] [Citation(s) in RCA: 92] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
BACKGROUND Coxsackievirus B3 infection is an excellent model of human myocarditis and dilated cardiomyopathy. Cardiac injury is caused either by a direct cytopathic effect of the virus or through immune-mediated mechanisms. Regulatory T cells (Tregs) play an important role in the negative modulation of host immune responses and set the threshold of autoimmune activation. This study was designed to test the protective effects of Tregs and to determine the underlying mechanisms. METHODS AND RESULTS Carboxyfluorescein diacetate succinimidyl ester-labeled Tregs or naïve CD4(+) T cells were injected intravenously once every 2 weeks 3 times into mice. The mice were then challenged with intraperitoneal coxsackievirus B3 immediately after the last cell transfer. Transfer of Tregs showed higher survival rates than transfer of CD4(+) T cells (P=0.0136) but not compared with the PBS injection group (P=0.0589). Interestingly, Tregs also significantly decreased virus titers and inflammatory scores in the heart. Transforming growth factor-beta and phosphorylated AKT were upregulated in Tregs-transferred mice and coxsackie-adenovirus receptor expression was decreased in the heart compared with control groups. Transforming growth factor-beta decreased coxsackie-adenovirus receptor expression and inhibited coxsackievirus B3 infection in HL-1 cells and neonatal cardiac myocytes. Splenocytes collected from Treg-, CD4(+) T-cell-, and PBS-treated mice proliferated equally when stimulated with heat-inactivated virus, whereas in the Treg group, the proliferation rate was reduced significantly when stimulated with noninfected heart tissue homogenate. CONCLUSIONS Adoptive transfer of Tregs protected mice from coxsackievirus B3-induced myocarditis through the transforming growth factor beta-coxsackie-adenovirus receptor pathway and thus suppresses the immune response to cardiac tissue, maintaining the antiviral immune response.
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Affiliation(s)
- Yu Shi
- Division of Cardiology, Heart and Stroke/Richard Lewar Centre of Excellence, University Health Network, Toronto General Hospital, 200 Elizabeth Street, Toronto, Ontario, Canada
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15
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Root-Bernstein R, Vonck J, Podufaly A. Antigenic complementarity between coxsackie virus and streptococcus in the induction of rheumatic heart disease and autoimmune myocarditis. Autoimmunity 2009; 42:1-16. [PMID: 18608177 DOI: 10.1080/08916930802208540] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Abstract
A variety of clinical, epidemiological, and experimental data suggest that rheumatic heart disease and autoimmune myocarditis are not only similar in their pathogenesis, but may often be due to combined infections with coxsackie virus (CX) and streptococcus A bacteria (SA). This paper reviews the evidence for this hypothesis, provides some new experimental data supporting the hypothesis, and suggests specific experiments for testing it. While, it is well-established that the M protein of SA mimics myosin, we demonstrate using homology search tools that various CX proteins mimic actin. We further demonstrate that antibody against CX recognizes actin as an antigen, and that anti-actin antibodies recognize CX antigen. Thus, anti-CX antibodies may also target muscle. Moreover, since myosin and actin are molecularly complementary, it follows that some SA and CX proteins may be molecularly complementary. Some antibodies against these complementary proteins in SA and CX should therefore act like idiotype-antiidiotype antibodies. We show that, indeed, CX and SA antibodies precipitate each other. Thus, it is possible that combined CX-SA infections produce more severe disease by producing pairs of idiotypic antibodies that act like antiidiotypic antibodies as well, thereby, disregulating immune control and triggering an autoimmune reaction against both myosin and actin simultaneously. We predict that combinations of the appropriate actin- and myosin-like antigens from CX and SA will, therefore, be much more autoimmunogenic than antigens from CX or SA alone, and that the combination will not require use of adjuvants or self-proteins that many current protocols require. It is possible that co-infections involving CX or SA with other infectious agents may produce similarly enhanced disease.
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16
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Esfandiarei M, McManus BM. Molecular biology and pathogenesis of viral myocarditis. ANNUAL REVIEW OF PATHOLOGY-MECHANISMS OF DISEASE 2008; 3:127-55. [PMID: 18039131 DOI: 10.1146/annurev.pathmechdis.3.121806.151534] [Citation(s) in RCA: 277] [Impact Index Per Article: 17.3] [Reference Citation Analysis] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Myocarditis is a cardiac disease associated with inflammation and injury of the myocardium. Several viruses have been associated with myocarditis in humans. However, coxsackievirus B3 is still considered the dominant etiological agent. The observed pathology in viral myocarditis is a result of cooperation or teamwork between viral processes and host immune responses at various stages of disease. Both innate and adaptive immune responses are crucial determinants of the severity of myocardial damage, and contribute to the development of chronic myocarditis and dilated cardiomyopathy following acute viral myocarditis. Advances in genomics and proteomics, and in the use of informatics and biostatistics, are allowing unbiased initial evaluations that can be the basis for testable hypotheses about virus pathogenesis and new therapies.
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Affiliation(s)
- Mitra Esfandiarei
- The James Hogg iCAPTURE Center for Cardiovascular and Pulmonary Research, St. Paul's Hospital, Providence Health Care Research Institute, Vancouver, Canada.
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17
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Abstract
Virus infections are implicated in several autoimmune diseases. Multiple mechanisms of autoimmunity induction have been proposed including antigenic mimicry, production of cryptic epitopes and infection acting as both adjuvant for self-antigens and the mechanism of releasing these cell antigens. Evidence for these mechanisms in coxsackievirus B3 induced myocarditis is discussed.
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Affiliation(s)
- Sally A Huber
- University of Vermont, Department of Pathology, Colchester, VT 05446, USA.
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18
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Kallwellis-Opara A, Dörner A, Poller WC, Noutsias M, Kühl U, Schultheiss HP, Pauschinger M. Autoimmunological features in inflammatory cardiomyopathy. Clin Res Cardiol 2007; 96:469-80. [PMID: 17503113 DOI: 10.1007/s00392-007-0524-x] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/21/2006] [Accepted: 02/28/2007] [Indexed: 12/31/2022]
Abstract
During recent years, increasing evidence has been obtained that cellular as well as humoral autoimmunity is involved in the pathogenesis of dilated cardiomyopathy (DCM). The immune system is generally activated by viral infections with the objective of virus elimination from the myocardium. However, a relevant number of patients demonstrate viral persistence and/or chronic inflammation in the myocardium. This chronic myocardial inflammation, defined by chronic inflammation, is termed "inflammatory cardiomyopathy" according to the WHO classification of cardiomyopathies. Chronic inflammation is frequently followed by the development of autoimmunity. A breakdown in the control mechanisms protecting against autoimmune reactions by both presentation of normally not accessible self-antigens and bystander- activation, induced by the pathogen, leads to the formation of autoreactive antibodies and T cells. The auto-reactive antibodies interact directly with heart tissue resulting in altered signal transduction or complement activation, whereas the T cell-mediated mechanisms include direct attack by cytotoxic T cells or indirect effects of cytotoxic cytokines released by stimulated T cells or macrophages.
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Affiliation(s)
- Angela Kallwellis-Opara
- Charité - Universitätsmedizin Berlin, Campus Benjamin-Franklin, Medizinische Klinik II, Abteilung für Kardiologie und Pneumologie, Hindenburgdamm 30, 12200 Berlin, Germany
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Dörner A, Kallwellis-Opara A, Pauschinger M, Kühl U, Schultheiss HP. Cardiac autoantibodies in viral myocarditis. Heart Fail Clin 2007; 1:333-43. [PMID: 17386858 DOI: 10.1016/j.hfc.2005.06.010] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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Bevan AL, Zhang H, Li Y, Archard LC. Nitric oxide and Coxsackievirus B3 myocarditis: differential expression of inducible nitric oxide synthase in mouse heart after infection with virulent or attenuated virus. J Med Virol 2001; 64:175-82. [PMID: 11360250 DOI: 10.1002/jmv.1033] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Increased expression of inducible nitric oxide synthase (iNOS) has been found in inflammatory myocardial disease and increased production of nitric oxide (NO) has both an inhibitory effect on virus replication and a cytotoxic effect on host cells. To investigate the relationship between severity of enteroviral myocarditis and iNOS expression, a characterised murine model was infected with either cardiovirulent or an attenuated Coxsackievirus B3 and myocardial samples were collected on Day 7. The ability of these viruses to induce NOS expression was compared by measurement of iNOS enzyme activity and localisation of iNOS protein or peroxynitrite, a product of excessive NO production. In accordance with previous reports, high expression of iNOS was detected in mice infected with the cardiovirulent virus. The iNOS protein was located mainly in infiltrating macrophages in and around foci of necrotic myofibres where viral genomic RNA was detected. In contrast, the level of iNOS expression was significantly lower in mice infected with the attenuated virus. This correlates with fewer and smaller myocarditic lesions and less infiltrating cells in the heart. iNOS was not detected in mock-infected mice by the above assays. These findings suggest that one mechanism of attenuation may be associated with the reduced ability of the variant to induce NOS expression in the heart. This also confirms a cytotoxic role for NO in the pathogenesis of Coxsackievirus B3-induced myocarditis.
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Affiliation(s)
- A L Bevan
- Molecular Pathology Section of Division of Biomedical Sciences, Imperial College School of Medicine, Exhibition Road, London, SW7 2AZ, United Kingdom
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McLaughlin L, Zhu G, Mistry M, Ley-Ebert C, Stuart WD, Florio CJ, Groen PA, Witt SA, Kimball TR, Witte DP, Harmony JA, Aronow BJ. Apolipoprotein J/clusterin limits the severity of murine autoimmune myocarditis. J Clin Invest 2000; 106:1105-13. [PMID: 11067863 PMCID: PMC301413 DOI: 10.1172/jci9037] [Citation(s) in RCA: 167] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Apolipoprotein J/clusterin (apoJ/clusterin), an intriguing protein with unknown function, is induced in myocarditis and numerous other inflammatory injuries. To test its ability to modify myosin-induced autoimmune myocarditis, we generated apoJ-deficient mice. ApoJ-deficient and wild-type mice exhibited similar initial onset of myocarditis, as evidenced by the induction of two early markers of the T cell-mediated immune response, MHC-II and TNF receptor p55. Furthermore, autoantibodies against the primary antigen cardiac myosin were induced to the same extent. Although the same proportion of challenged animals exhibited some degree of inflammatory infiltrate, inflammation was more severe in apoJ-deficient animals. Inflammatory lesions were more diffuse and extensive in apoJ-deficient mice, particularly in females. In marked contrast to wild-type animals, the development of a strong generalized secondary response against cardiac antigens in apoJ-deficient mice was predictive of severe myocarditis. Wild-type mice with a strong Ab response to secondary antigens appeared to be protected from severe inflammation. After resolution of inflammation, apoJ-deficient, but not wild-type, mice exhibited cardiac function impairment and severe myocardial scarring. These results suggest that apoJ limits progression of autoimmune myocarditis and protects the heart from postinflammatory tissue destruction.
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Affiliation(s)
- L McLaughlin
- Department of Pharmacology and Cell Biophysics, University of Cincinnati College of Medicine, Cincinnati, Ohio 45267-0575, USA
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Rosenstein ED, Zucker MJ, Kramer N. Giant cell myocarditis: most fatal of autoimmune diseases. Semin Arthritis Rheum 2000; 30:1-16. [PMID: 10966208 DOI: 10.1053/sarh.2000.8367] [Citation(s) in RCA: 51] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
OBJECTIVE To increase awareness of giant cell myocarditis (GCM), its pathogenesis, and treatment. METHODS Review of relevant publications from the English-language literature. RESULTS GCM is a rare, frequently fatal inflammatory disorder of cardiac muscle of unknown origin, characterized by widespread degeneration and necrosis of myocardial fibers.Congestive heart failure and ventricular tachycardia are common clinical manifestations. GCM occurs primarily in previously healthy adults, although it is frequently associated with various systemic diseases, primarily of autoimmune causes. The inflammatory infiltrate is characterized by the presence of multinucleated giant cells and is distinct from cardiac sarcoidosis. Animal models of GCM are similar to models of other autoimmune disorders such as rheumatoid arthritis. The prognosis, which is poor despite partial responsiveness to immunosuppressive medications, is improved with cardiac transplantation. CONCLUSIONS The clinical and immunopathogenetic similarities with classical rheumatologic diseases, the differential diagnosis with sarcoidosis and other inflammatory conditions, and the use of standard immunosuppressive medications make GCM a disease process that should be added to the rheumatologist's expertise.
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Affiliation(s)
- E D Rosenstein
- Division of Rheumatology and Arthritis and Rheumatic Disease Center, St. Barnabas Medical Center, Livingston, NJ 07039, USA.
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