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Uccello G, Bonacchi G, Rossi VA, Montrasio G, Beltrami M. Myocarditis and Chronic Inflammatory Cardiomyopathy, from Acute Inflammation to Chronic Inflammatory Damage: An Update on Pathophysiology and Diagnosis. J Clin Med 2023; 13:150. [PMID: 38202158 PMCID: PMC10780032 DOI: 10.3390/jcm13010150] [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: 12/03/2023] [Revised: 12/18/2023] [Accepted: 12/20/2023] [Indexed: 01/12/2024] Open
Abstract
Acute myocarditis covers a wide spectrum of clinical presentations, from uncomplicated myocarditis to severe forms complicated by hemodynamic instability and ventricular arrhythmias; however, all these forms are characterized by acute myocardial inflammation. The term "chronic inflammatory cardiomyopathy" describes a persistent/chronic inflammatory condition with a clinical phenotype of dilated and/or hypokinetic cardiomyopathy associated with symptoms of heart failure and increased risk for arrhythmias. A continuum can be identified between these two conditions. The importance of early diagnosis has grown markedly in the contemporary era with various diagnostic tools available. While cardiac magnetic resonance (CMR) is valid for diagnosis and follow-up, endomyocardial biopsy (EMB) should be considered as a first-line diagnostic modality in all unexplained acute cardiomyopathies complicated by hemodynamic instability and ventricular arrhythmias, considering the local expertise. Genetic counseling should be recommended in those cases where a genotype-phenotype association is suspected, as this has significant implications for patients' and their family members' prognoses. Recognition of the pathophysiological pathway and clinical "red flags" and an early diagnosis may help us understand mechanisms of progression, tailor long-term preventive and therapeutic strategies for this complex disease, and ultimately improve clinical outcomes.
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Affiliation(s)
- Giuseppe Uccello
- Division of Cardiology, Alessandro Manzoni Hospital—ASST Lecco, 23900 Lecco, Italy;
| | - Giacomo Bonacchi
- Division of Cardiology, Tor Vergata University Hospital, 00133 Rome, Italy;
| | | | - Giulia Montrasio
- Inherited Cardiovascular Diseases Unit, Barts Heart Centre, St. Bartholomew’s Hospital, London EC1A 7BS, UK;
| | - Matteo Beltrami
- Cardiomyopathy Unit, Careggi University Hospital, 50134 Florence, Italy
- Arrhythmia and Electrophysiology Unit, Careggi University Hospital, 50134 Florence, Italy
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Khan M, Jahangir A. The Uncertain Benefit from Implantable Cardioverter-Defibrillators in Nonischemic Cardiomyopathy: How to Guide Clinical Decision-Making? Cardiol Clin 2023; 41:545-555. [PMID: 37743077 DOI: 10.1016/j.ccl.2023.06.005] [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: 09/26/2023]
Abstract
Life-threatening dysrhythmias remain a significant cause of mortality in patients with nonischemic cardiomyopathy (NICM). Implantable cardioverter-defibrillators (ICD) effectively reduce mortality in patients who have survived a life-threatening arrhythmic event. The evidence for survival benefit of primary prevention ICD for patients with high-risk NICM on guideline-directed medical therapy is not as robust, with efficacy questioned by recent studies. In this review, we summarize the data on the risk of life-threatening arrhythmias in NICM, the recommendations, and the evidence supporting the efficacy of primary prevention ICD, and highlight tools that may improve the identification of patients who could benefit from primary prevention ICD implantation.
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Affiliation(s)
- Mohsin Khan
- Aurora Cardiovascular and Thoracic Services, Center for Advanced Atrial Fibrillation Therapies, Aurora Sinai/Aurora St. Luke's Medical Centers, Advocate Aurora Health, 2801 West Kinnickinnic River Parkway, Suite 777, Milwaukee, WI 53215, USA
| | - Arshad Jahangir
- Aurora Cardiovascular and Thoracic Services, Center for Advanced Atrial Fibrillation Therapies, Aurora Sinai/Aurora St. Luke's Medical Centers, Advocate Aurora Health, 2801 West Kinnickinnic River Parkway, Suite 777, Milwaukee, WI 53215, USA.
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3
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Fanti S, Stephenson E, Rocha-Vieira E, Protonotarios A, Kanoni S, Shahaj E, Longhi MP, Vyas VS, Dyer C, Pontarini E, Asimaki A, Bueno-Beti C, De Gaspari M, Rizzo S, Basso C, Bombardieri M, Coe D, Wang G, Harding D, Gallagher I, Solito E, Elliott P, Heymans S, Sikking M, Savvatis K, Mohiddin SA, Marelli-Berg FM. Circulating c-Met-Expressing Memory T Cells Define Cardiac Autoimmunity. Circulation 2022; 146:1930-1945. [PMID: 36417924 PMCID: PMC9770129 DOI: 10.1161/circulationaha.121.055610] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/07/2021] [Accepted: 09/20/2022] [Indexed: 11/25/2022]
Abstract
BACKGROUND Autoimmunity is increasingly recognized as a key contributing factor in heart muscle diseases. The functional features of cardiac autoimmunity in humans remain undefined because of the challenge of studying immune responses in situ. We previously described a subset of c-mesenchymal epithelial transition factor (c-Met)-expressing (c-Met+) memory T lymphocytes that preferentially migrate to cardiac tissue in mice and humans. METHODS In-depth phenotyping of peripheral blood T cells, including c-Met+ T cells, was undertaken in groups of patients with inflammatory and noninflammatory cardiomyopathies, patients with noncardiac autoimmunity, and healthy controls. Validation studies were carried out using human cardiac tissue and in an experimental model of cardiac inflammation. RESULTS We show that c-Met+ T cells are selectively increased in the circulation and in the myocardium of patients with inflammatory cardiomyopathies. The phenotype and function of c-Met+ T cells are distinct from those of c-Met-negative (c-Met-) T cells, including preferential proliferation to cardiac myosin and coproduction of multiple cytokines (interleukin-4, interleukin-17, and interleukin-22). Furthermore, circulating c-Met+ T cell subpopulations in different heart muscle diseases identify distinct and overlapping mechanisms of heart inflammation. In experimental autoimmune myocarditis, elevations in autoantigen-specific c-Met+ T cells in peripheral blood mark the loss of immune tolerance to the heart. Disease development can be halted by pharmacologic c-Met inhibition, indicating a causative role for c-Met+ T cells. CONCLUSIONS Our study demonstrates that the detection of circulating c-Met+ T cells may have use in the diagnosis and monitoring of adaptive cardiac inflammation and definition of new targets for therapeutic intervention when cardiac autoimmunity causes or contributes to progressive cardiac injury.
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Affiliation(s)
- Silvia Fanti
- William Harvey Research Institute, Barts and The London Faculty of Medicine and Dentistry (S.F., E. Stephenson, E.R.-V., S.K., E. Shahaj, M.P.L., V.S.V., C.D., E.P., M.B., D.C., G.W., D.H., E. Solito, K.S., S.A.M., F.M.M.-B.), Queen Mary University of London, UK
| | - Edward Stephenson
- William Harvey Research Institute, Barts and The London Faculty of Medicine and Dentistry (S.F., E. Stephenson, E.R.-V., S.K., E. Shahaj, M.P.L., V.S.V., C.D., E.P., M.B., D.C., G.W., D.H., E. Solito, K.S., S.A.M., F.M.M.-B.), Queen Mary University of London, UK
- Barts Heart Centre, Barts Health NHS Trust, St Bartholomew’s Hospital, West Smithfield, London (E. Stephenson, A.P., V.S.V., D.H., P.E., K.S., S.A.M.)
| | - Etel Rocha-Vieira
- William Harvey Research Institute, Barts and The London Faculty of Medicine and Dentistry (S.F., E. Stephenson, E.R.-V., S.K., E. Shahaj, M.P.L., V.S.V., C.D., E.P., M.B., D.C., G.W., D.H., E. Solito, K.S., S.A.M., F.M.M.-B.), Queen Mary University of London, UK
- Federal University of Vales do Jequitinhonha e Mucuri, Diamantina, Minas Gerais, Brazil (E.R.-V.)
| | - Alexandros Protonotarios
- Barts Heart Centre, Barts Health NHS Trust, St Bartholomew’s Hospital, West Smithfield, London (E. Stephenson, A.P., V.S.V., D.H., P.E., K.S., S.A.M.)
- Institute of Cardiovascular Science, University College London, UK (A.P., P.E.)
| | - Stavroula Kanoni
- William Harvey Research Institute, Barts and The London Faculty of Medicine and Dentistry (S.F., E. Stephenson, E.R.-V., S.K., E. Shahaj, M.P.L., V.S.V., C.D., E.P., M.B., D.C., G.W., D.H., E. Solito, K.S., S.A.M., F.M.M.-B.), Queen Mary University of London, UK
| | - Eriomina Shahaj
- William Harvey Research Institute, Barts and The London Faculty of Medicine and Dentistry (S.F., E. Stephenson, E.R.-V., S.K., E. Shahaj, M.P.L., V.S.V., C.D., E.P., M.B., D.C., G.W., D.H., E. Solito, K.S., S.A.M., F.M.M.-B.), Queen Mary University of London, UK
| | - M. Paula Longhi
- William Harvey Research Institute, Barts and The London Faculty of Medicine and Dentistry (S.F., E. Stephenson, E.R.-V., S.K., E. Shahaj, M.P.L., V.S.V., C.D., E.P., M.B., D.C., G.W., D.H., E. Solito, K.S., S.A.M., F.M.M.-B.), Queen Mary University of London, UK
| | - Vishal S. Vyas
- William Harvey Research Institute, Barts and The London Faculty of Medicine and Dentistry (S.F., E. Stephenson, E.R.-V., S.K., E. Shahaj, M.P.L., V.S.V., C.D., E.P., M.B., D.C., G.W., D.H., E. Solito, K.S., S.A.M., F.M.M.-B.), Queen Mary University of London, UK
- Barts Heart Centre, Barts Health NHS Trust, St Bartholomew’s Hospital, West Smithfield, London (E. Stephenson, A.P., V.S.V., D.H., P.E., K.S., S.A.M.)
| | - Carlene Dyer
- William Harvey Research Institute, Barts and The London Faculty of Medicine and Dentistry (S.F., E. Stephenson, E.R.-V., S.K., E. Shahaj, M.P.L., V.S.V., C.D., E.P., M.B., D.C., G.W., D.H., E. Solito, K.S., S.A.M., F.M.M.-B.), Queen Mary University of London, UK
| | - Elena Pontarini
- William Harvey Research Institute, Barts and The London Faculty of Medicine and Dentistry (S.F., E. Stephenson, E.R.-V., S.K., E. Shahaj, M.P.L., V.S.V., C.D., E.P., M.B., D.C., G.W., D.H., E. Solito, K.S., S.A.M., F.M.M.-B.), Queen Mary University of London, UK
| | - Angeliki Asimaki
- Molecular and Clinical Science Institute, St George’s, University of London, UK (A.A., C.B.-B.)
| | - Carlos Bueno-Beti
- Molecular and Clinical Science Institute, St George’s, University of London, UK (A.A., C.B.-B.)
| | - Monica De Gaspari
- Department of Cardiac, Thoracic, Vascular Sciences and Public Health, University of Padua Medical School, Italy (M.D.G., S.R., C.B.)
| | - Stefania Rizzo
- Department of Cardiac, Thoracic, Vascular Sciences and Public Health, University of Padua Medical School, Italy (M.D.G., S.R., C.B.)
| | - Cristina Basso
- Department of Cardiac, Thoracic, Vascular Sciences and Public Health, University of Padua Medical School, Italy (M.D.G., S.R., C.B.)
| | - Michele Bombardieri
- William Harvey Research Institute, Barts and The London Faculty of Medicine and Dentistry (S.F., E. Stephenson, E.R.-V., S.K., E. Shahaj, M.P.L., V.S.V., C.D., E.P., M.B., D.C., G.W., D.H., E. Solito, K.S., S.A.M., F.M.M.-B.), Queen Mary University of London, UK
| | - David Coe
- William Harvey Research Institute, Barts and The London Faculty of Medicine and Dentistry (S.F., E. Stephenson, E.R.-V., S.K., E. Shahaj, M.P.L., V.S.V., C.D., E.P., M.B., D.C., G.W., D.H., E. Solito, K.S., S.A.M., F.M.M.-B.), Queen Mary University of London, UK
| | - Guosu Wang
- William Harvey Research Institute, Barts and The London Faculty of Medicine and Dentistry (S.F., E. Stephenson, E.R.-V., S.K., E. Shahaj, M.P.L., V.S.V., C.D., E.P., M.B., D.C., G.W., D.H., E. Solito, K.S., S.A.M., F.M.M.-B.), Queen Mary University of London, UK
| | - Daniel Harding
- William Harvey Research Institute, Barts and The London Faculty of Medicine and Dentistry (S.F., E. Stephenson, E.R.-V., S.K., E. Shahaj, M.P.L., V.S.V., C.D., E.P., M.B., D.C., G.W., D.H., E. Solito, K.S., S.A.M., F.M.M.-B.), Queen Mary University of London, UK
- Barts Heart Centre, Barts Health NHS Trust, St Bartholomew’s Hospital, West Smithfield, London (E. Stephenson, A.P., V.S.V., D.H., P.E., K.S., S.A.M.)
| | - Iain Gallagher
- Faculty of Health Sciences & Sport, University of Stirling, UK (I.G.)
| | - Egle Solito
- William Harvey Research Institute, Barts and The London Faculty of Medicine and Dentistry (S.F., E. Stephenson, E.R.-V., S.K., E. Shahaj, M.P.L., V.S.V., C.D., E.P., M.B., D.C., G.W., D.H., E. Solito, K.S., S.A.M., F.M.M.-B.), Queen Mary University of London, UK
- Department of Medicina Molecolare e Biotecnologie Mediche, University of Naples “Federico II,” Italy (E. Solito)
| | - Perry Elliott
- Barts Heart Centre, Barts Health NHS Trust, St Bartholomew’s Hospital, West Smithfield, London (E. Stephenson, A.P., V.S.V., D.H., P.E., K.S., S.A.M.)
- Institute of Cardiovascular Science, University College London, UK (A.P., P.E.)
| | - Stephane Heymans
- Maastricht University Medical Centre, Cardiovascular Research Institute Maastricht, the Netherlands (S.H., M.S.)
- Department of Cardiovascular Sciences, Centre for Vascular and Molecular Biology, KU Leuven, Belgium (S.H.)
| | - Maurits Sikking
- Maastricht University Medical Centre, Cardiovascular Research Institute Maastricht, the Netherlands (S.H., M.S.)
| | - Konstantinos Savvatis
- William Harvey Research Institute, Barts and The London Faculty of Medicine and Dentistry (S.F., E. Stephenson, E.R.-V., S.K., E. Shahaj, M.P.L., V.S.V., C.D., E.P., M.B., D.C., G.W., D.H., E. Solito, K.S., S.A.M., F.M.M.-B.), Queen Mary University of London, UK
- Barts Heart Centre, Barts Health NHS Trust, St Bartholomew’s Hospital, West Smithfield, London (E. Stephenson, A.P., V.S.V., D.H., P.E., K.S., S.A.M.)
| | - Saidi A. Mohiddin
- William Harvey Research Institute, Barts and The London Faculty of Medicine and Dentistry (S.F., E. Stephenson, E.R.-V., S.K., E. Shahaj, M.P.L., V.S.V., C.D., E.P., M.B., D.C., G.W., D.H., E. Solito, K.S., S.A.M., F.M.M.-B.), Queen Mary University of London, UK
- Barts Heart Centre, Barts Health NHS Trust, St Bartholomew’s Hospital, West Smithfield, London (E. Stephenson, A.P., V.S.V., D.H., P.E., K.S., S.A.M.)
| | - Federica M. Marelli-Berg
- William Harvey Research Institute, Barts and The London Faculty of Medicine and Dentistry (S.F., E. Stephenson, E.R.-V., S.K., E. Shahaj, M.P.L., V.S.V., C.D., E.P., M.B., D.C., G.W., D.H., E. Solito, K.S., S.A.M., F.M.M.-B.), Queen Mary University of London, UK
- Centre for Inflammation and Therapeutic Innovation (F.M.M.-B.), Queen Mary University of London, UK
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Abstract
Purpose of Review In coronavirus disease 2019 (COVID-19), myocardial injury occurs frequently in severe or critically ill hospitalized patients, yet myocarditis is much less common. In this context, revisiting the definition of myocarditis is appropriate with a specific focus on diagnostic and management considerations in patients infected with SARS-CoV-2. Recent Findings Pathologic cardiac specimens from patients with COVID-19 suggest a mixed inflammatory response involving lymphocytes and macrophages, and importantly, cellular injury occurs predominantly at the level of pericytes and endothelial cells, less often involving direct myocyte necrosis. In COVID-19, the diagnosis of myocarditis has understandably been based predominantly on clinical criteria, and the number of patients with clinically suspected myocarditis who would meet diagnostic histological criteria is unclear. Echocardiography and cardiac magnetic resonance are important diagnostic tools, although the prognostic implications of abnormalities are still being defined. Importantly, SARS-CoV2 myocarditis should be diagnosed within an appropriate clinical context and should not be based on isolated imaging findings. Therapies in COVID-19 have focused on the major clinical manifestation of pneumonia, but the promotion of viral clearance early in the disease could prevent the development of myocarditis, and further study of immunosuppressive therapies once myocarditis has developed are indicated. Summary A strict and uniform approach is needed to diagnose myocarditis due to SARS-CoV-2 to better understand the natural history of this disease and to facilitate evaluation of potential therapeutic interventions. A methodological approach will also better inform the incidence of COVID-19 associated myocarditis and potential long-term health effects.
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Stege NM, de Boer RA, van den Berg MP, Silljé HHW. The Time Has Come to Explore Plasma Biomarkers in Genetic Cardiomyopathies. Int J Mol Sci 2021; 22:2955. [PMID: 33799487 PMCID: PMC7998409 DOI: 10.3390/ijms22062955] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2021] [Revised: 03/09/2021] [Accepted: 03/11/2021] [Indexed: 12/17/2022] Open
Abstract
For patients with hypertrophic cardiomyopathy (HCM), dilated cardiomyopathy (DCM) or arrhythmogenic cardiomyopathy (ACM), screening for pathogenic variants has become standard clinical practice. Genetic cascade screening also allows the identification of relatives that carry the same mutation as the proband, but disease onset and severity in mutation carriers often remains uncertain. Early detection of disease onset may allow timely treatment before irreversible changes are present. Although plasma biomarkers may aid in the prediction of disease onset, monitoring relies predominantly on identifying early clinical symptoms, on imaging techniques like echocardiography (Echo) and cardiac magnetic resonance imaging (CMR), and on (ambulatory) electrocardiography (electrocardiograms (ECGs)). In contrast to most other cardiac diseases, which are explained by a combination of risk factors and comorbidities, genetic cardiomyopathies have a clear primary genetically defined cardiac background. Cardiomyopathy cohorts could therefore have excellent value in biomarker studies and in distinguishing biomarkers related to the primary cardiac disease from those related to extracardiac, secondary organ dysfunction. Despite this advantage, biomarker investigations in cardiomyopathies are still limited, most likely due to the limited number of carriers in the past. Here, we discuss not only the potential use of established plasma biomarkers, including natriuretic peptides and troponins, but also the use of novel biomarkers, such as cardiac autoantibodies in genetic cardiomyopathy, and discuss how we can gauge biomarker studies in cardiomyopathy cohorts for heart failure at large.
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Affiliation(s)
| | | | | | - Herman H. W. Silljé
- Department of Cardiology, University Medical Center Groningen, University of Groningen, Hanzeplein 1, AB43, 9713 GZ Groningen, The Netherlands; (N.M.S.); (R.A.d.B.); (M.P.v.d.B.)
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Wölfel A, Sättele M, Zechmeister C, Nikolaev VO, Lohse MJ, Boege F, Jahns R, Boivin-Jahns V. Unmasking features of the auto-epitope essential for β 1 -adrenoceptor activation by autoantibodies in chronic heart failure. ESC Heart Fail 2020; 7:1830-1841. [PMID: 32436653 PMCID: PMC7373925 DOI: 10.1002/ehf2.12747] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2019] [Revised: 03/31/2020] [Accepted: 04/21/2020] [Indexed: 12/15/2022] Open
Abstract
Aims Chronic heart failure (CHF) can be caused by autoantibodies stimulating the heart via binding to first and/or second extracellular loops of cardiac β1‐adrenoceptors. Allosteric receptor activation depends on conformational features of the autoantibody binding site. Elucidating these features will pave the way for the development of specific diagnostics and therapeutics. Our aim was (i) to fine‐map the conformational epitope within the second extracellular loop of the human β1‐adrenoceptor (β1ECII) that is targeted by stimulating β1‐receptor (auto)antibodies and (ii) to generate competitive cyclopeptide inhibitors of allosteric receptor activation, which faithfully conserve the conformational auto‐epitope. Methods and results Non‐conserved amino acids within the β1ECII loop (compared with the amino acids constituting the ECII loop of the β2‐adrenoceptor) were one by one replaced with alanine; potential intra‐loop disulfide bridges were probed by cysteine–serine exchanges. Effects on antibody binding and allosteric receptor activation were assessed (i) by (auto)antibody neutralization using cyclopeptides mimicking β1ECII ± the above replacements, and (ii) by (auto)antibody stimulation of human β1‐adrenoceptors bearing corresponding point mutations. With the use of stimulating β1‐receptor (auto)antibodies raised in mice, rats, or rabbits and isolated from exemplary dilated cardiomyopathy patients, our series of experiments unmasked two features of the β1ECII loop essential for (auto)antibody binding and allosteric receptor activation: (i) the NDPK211–214 motif and (ii) the intra‐loop disulfide bond C209↔C215. Of note, aberrant intra‐loop disulfide bond C209↔C216 almost fully disrupted the functional auto‐epitope in cyclopeptides. Conclusions The conformational auto‐epitope targeted by cardio‐pathogenic β1‐receptor autoantibodies is faithfully conserved in cyclopeptide homologues of the β1ECII loop bearing the NDPK211–214 motif and the C209↔C215 bridge while lacking cysteine C216. Such molecules provide promising tools for novel diagnostic and therapeutic approaches in β1‐autoantibody‐positive CHF.
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Affiliation(s)
- Angela Wölfel
- Institute of Pharmacology and Toxicology, University of Würzburg, Versbacher Str. 9, D-97078, Wuerzburg, Germany.,Rudolf-Virchow-Centre, Josef-Schneider-Str. 2, 97080, Würzburg, Germany.,Rudolf-Virchow-Centre, Pierre Fabre Dermo-Kosmetik GmbH, Jechtinger Straße 13, 79111, Freiburg, Germany
| | - Mathias Sättele
- Institute of Pharmacology and Toxicology, University of Würzburg, Versbacher Str. 9, D-97078, Wuerzburg, Germany
| | - Christina Zechmeister
- Institute of Pharmacology and Toxicology, University of Würzburg, Versbacher Str. 9, D-97078, Wuerzburg, Germany.,Interdisciplinary Bank of Biomaterials and Data (ibdw), University Hospital of Würzburg, Straubmühlweg 2A, D-97078, Würzburg, Germany.,Comprehensive Heart Failure Centre (CFHC), Am Schwarzenberg 11, 978078, Würzburg, Germany
| | - Viacheslav O Nikolaev
- Institute of Pharmacology and Toxicology, University of Würzburg, Versbacher Str. 9, D-97078, Wuerzburg, Germany.,Institute for Molecular Cardiology, Department of Cardiology and Pneumology, University Hospital Hamburg-Eppendorf, Martinistraße 52, 20246, Hamburg, Germany
| | - Martin J Lohse
- Institute of Pharmacology and Toxicology, University of Würzburg, Versbacher Str. 9, D-97078, Wuerzburg, Germany.,Rudolf-Virchow-Centre, Josef-Schneider-Str. 2, 97080, Würzburg, Germany.,Institute Max Delbrück Center for Molecular Research, Berlin-Buch, Robert-Koch-Str. 40, 1000, Berlin, Germany
| | - Fritz Boege
- Rudolf-Virchow-Centre, Institute of Clinical Chemistry and Laboratory Diagnostics, University Hospital, Moorenstraße 5, 40225, Düsseldorf, Germany
| | - Roland Jahns
- Institute of Pharmacology and Toxicology, University of Würzburg, Versbacher Str. 9, D-97078, Wuerzburg, Germany.,Interdisciplinary Bank of Biomaterials and Data (ibdw), University Hospital of Würzburg, Straubmühlweg 2A, D-97078, Würzburg, Germany.,Comprehensive Heart Failure Centre (CFHC), Am Schwarzenberg 11, 978078, Würzburg, Germany
| | - Valérie Boivin-Jahns
- Institute of Pharmacology and Toxicology, University of Würzburg, Versbacher Str. 9, D-97078, Wuerzburg, Germany.,Comprehensive Heart Failure Centre (CFHC), Am Schwarzenberg 11, 978078, Würzburg, Germany
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Predictors for In-hospital Mortality in Pediatric Patients with Acute Myocarditis – a Retrospective Study. JOURNAL OF CARDIOVASCULAR EMERGENCIES 2020. [DOI: 10.2478/jce-2019-0019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Abstract
Background: Acute myocarditis, a primary inflammatory cardiac disease commonly caused by viral infection, is an important cause of morbidity and mortality in children. Data obtained from forensic studies found an incidence of 15–33% for acute myocarditis in sudden deaths in the pediatric age group. Currently, there is a lack of data regarding the incidence and factors associated with short-term outcomes in pediatric patients admitted for acute myocarditis.
The aim of the study was to identify predictors for in-hospital mortality in a pediatric population admitted with acute myocarditis.
Material and methods: We conducted a retrospective observational cohort study that included 21 patients admitted for acute myocarditis. Clinical, laboratory, ECG, and imaging data acquired via 2D transthoracic echocardiography and cardiac magnetic resonance imaging were collected from the medical charts of each included patient. The primary end-point of the study was all-cause mortality occurring during hospitalization (period ranging from 10 to 14 days). The study population was divided into 2 groups according to the occurrence of the primary end-point.
Results: The mean age of the study population was 99.62 ± 77.25 months, and 61.90% (n = 13) of the patients were males. The in-hospital mortality rate was 23.9% (n = 5). Patients in the deceased group were significantly younger than the survivors (55.60 ± 56.18 months vs. 113.4 ± 78.50 months, p = 0.039). Patients that had deceased presented a significantly higher level of LDH (365 ± 21.38 U/L vs. 234.4 ± 63.30 U/L, p = 0.0002) and a significantly higher rate of ventricular extrasystolic dysrhythmias (60% vs. 6.25%, p = 0.02, OR: 22.5, 95% CI: 1.5–335) compared to survivors. The 2D echocardiography showed that patients that had deceased presented more frequently an impaired left ventricular ejection fraction (<30%) (p = 0.001) and a significantly higher rate of severe mitral regurgitation (p = 0.001) compared to survivors.
Conclusions: The most powerful predictors for in-hospital mortality in pediatric patients admitted for acute myocarditis were the presence of ventricular extrasystolic dysrhythmias on the 24h Holter ECG monitoring, impaired left ventricular systolic function (LVEF <30%), the presence of severe mitral regurgitation, and confirmed infection with Mycoplasma pneumoniae.
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van den Hoogen P, de Jager SCA, Huibers MMH, Schoneveld AH, Puspitasari YM, Valstar GB, Oerlemans MIFJ, de Weger RA, Doevendans PA, den Ruijter HM, Laman JD, Vink A, Sluijter JPG. Increased circulating IgG levels, myocardial immune cells and IgG deposits support a role for an immune response in pre- and end-stage heart failure. J Cell Mol Med 2019; 23:7505-7516. [PMID: 31557411 PMCID: PMC6815814 DOI: 10.1111/jcmm.14619] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2019] [Revised: 07/17/2019] [Accepted: 08/03/2019] [Indexed: 12/22/2022] Open
Abstract
The chronic inflammatory response plays an important role in adverse cardiac remodelling and the development of heart failure (HF). There is also evidence that in the pathogenesis of several cardiovascular diseases, chronic inflammation is accompanied by antibody and complement deposits in the heart, suggestive of a true autoimmune response. However, the role of antibody-mediated immune responses in HF progression is less clear. We assessed whether immune cell infiltration and immunoglobulin levels are associated with HF type and disease stage, taking sex differences into account. We found IgG deposits and increased infiltration of immune cells in the affected myocardium of patients with end-stage HF with reduced ejection fraction (HFrEF, n = 20). Circulating levels of IgG1 and IgG3 were elevated in these patients. Furthermore, the percentage of transitional/regulatory B cells was decreased (from 6.9% to 2.4%) compared with healthy controls (n = 5). Similarly, increased levels of circulating IgG1 and IgG3 were observed in men with left ventricular diastolic dysfunction (LVDD, n = 5), possibly an early stage of HF with preserved EF (HFpEF). In conclusion, IgG deposits and infiltrates of immune cells are present in end-stage HFrEF. In addition, both LVDD patients and end-stage HFrEF patients show elevated levels of circulating IgG1 and IgG3, suggesting an antibody-mediated immune response upon cardiac remodelling, which in the early phase of remodelling appear to differ between men and women. These immunoglobulin subclasses might be used as marker for pre-stage HF and its progression. Future identification of auto-antigens might open possibilities for new therapeutic interventions.
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Affiliation(s)
- Patricia van den Hoogen
- Laboratory of Experimental Cardiology, UMC Utrecht Regenerative Medicine CenterUniversity Medical Center UtrechtUtrechtThe Netherlands
| | - Saskia C. A. de Jager
- Laboratory of Experimental Cardiology, UMC Utrecht Regenerative Medicine CenterUniversity Medical Center UtrechtUtrechtThe Netherlands
| | - Manon M. H. Huibers
- Department of PathologyUniversity Medical Center UtrechtUtrechtThe Netherlands
- Department of GeneticsUniversity Medical Center UtrechtUtrechtThe Netherlands
| | - Arjan H. Schoneveld
- Laboratory of Clinical Chemistry & Haematology, ARCADIAUniversity Medical Center UtrechtUtrechtThe Netherlands
| | - Yustina M. Puspitasari
- Laboratory of Experimental Cardiology, UMC Utrecht Regenerative Medicine CenterUniversity Medical Center UtrechtUtrechtThe Netherlands
- Center for Molecular CardiologyUniversity of ZurichZurichSwitzerland
| | - Gideon B. Valstar
- Laboratory of Experimental Cardiology, UMC Utrecht Regenerative Medicine CenterUniversity Medical Center UtrechtUtrechtThe Netherlands
| | | | - Roel A. de Weger
- Department of PathologyUniversity Medical Center UtrechtUtrechtThe Netherlands
| | - Pieter A. Doevendans
- Department of CardiologyUniversity Medical Center UtrechtUtrechtThe Netherlands
- Heart and Lungs, Experimental CardiologyNetherlands Heart Institute (NHI)UtrechtThe Netherlands
- Centraal Militair Hospitaal (CMH)UtrechtThe Netherlands
| | - Hester M. den Ruijter
- Laboratory of Experimental Cardiology, UMC Utrecht Regenerative Medicine CenterUniversity Medical Center UtrechtUtrechtThe Netherlands
| | - Jon D. Laman
- Department of Biomedical Sciences of Cells and Systems (BSCS)University Medical Center GroningenGroningenThe Netherlands
| | - Aryan Vink
- Department of PathologyUniversity Medical Center UtrechtUtrechtThe Netherlands
| | - Joost P. G. Sluijter
- Laboratory of Experimental Cardiology, UMC Utrecht Regenerative Medicine CenterUniversity Medical Center UtrechtUtrechtThe Netherlands
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9
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Cannie DE, Akhtar MM, Elliott P. Hidden in Heart Failure. Eur Cardiol 2019; 14:89-96. [PMID: 31360229 PMCID: PMC6659034 DOI: 10.15420/ecr.2019.19.2] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2019] [Accepted: 06/06/2019] [Indexed: 02/06/2023] Open
Abstract
Current diagnostic strategies fail to illuminate the presence of rare disease in the heart failure population. One-third of heart failure patients are categorised as suffering an idiopathic dilated cardiomyopathy, while others are labelled only as heart failure with preserved ejection fraction. Those affected frequently suffer from delays in diagnosis, which can have a significant impact on quality of life and prognosis. Traditional rhetoric argues that delineation of this patient population is superfluous to treatment, as elucidation of aetiology will not lead to a deviation from standard management protocols. This article emphasises the importance of identifying genetic, inflammatory and infiltrative causes of heart failure to enable patients to access tailored management strategies.
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Affiliation(s)
- Douglas Ewan Cannie
- University College London Institute for Cardiovascular Science London, UK.,Barts Heart Centre, Barts Health NHS Trust London, UK
| | - Mohammed Majid Akhtar
- University College London Institute for Cardiovascular Science London, UK.,Barts Heart Centre, Barts Health NHS Trust London, UK
| | - Perry Elliott
- University College London Institute for Cardiovascular Science London, UK.,Barts Heart Centre, Barts Health NHS Trust London, UK
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10
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Abstract
Inflammatory activation occurs in nearly all forms of myocardial injury. In contrast, inflammatory cardiomyopathies refer to a diverse group of disorders in which inflammation of the heart (or myocarditis) is the proximate cause of myocardial dysfunction, causing injury that can range from a fully recoverable syndrome to one that leads to chronic remodeling and dilated cardiomyopathy. The most common cause of inflammatory cardiomyopathies in developed countries is lymphocytic myocarditis most commonly caused by a viral pathogenesis. In Latin America, cardiomyopathy caused by Chagas disease is endemic. The true incidence of myocarditis is unknown to the limited utilization and the poor sensitivity of endomyocardial biopsies (especially for patchy diseases such as lymphocytic myocarditis and sarcoidosis) using the gold-standard Dallas criteria. Emerging immunohistochemistry criteria and molecular diagnostic techniques are being developed that will improve diagnostic yield, provide additional clues into the pathophysiology, and offer an application of precision medicine to these important syndromes. Immunosuppression is recommended for patients with cardiac sarcoidosis, giant cell myocarditis, and myocarditis associated with connective tissue disorders and may be beneficial in chronic viral myocarditis once virus is cleared. Further trials of immunosuppression, antiviral, and immunomodulating therapies are needed. Together, with new molecular-based diagnostics and therapies tailored to specific pathogeneses, the outcome of patients with these disorders may improve.
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Affiliation(s)
- Barry H Trachtenberg
- From the Houston Methodist DeBakey Heart and Vascular Center (B.H.T.), TX; University of Miami Leonard Miller School of Medicine, FL (J.M.H.); and Interdisciplinary Stem Cell Institute, Miami, FL (J.M.H.)
| | - Joshua M Hare
- From the Houston Methodist DeBakey Heart and Vascular Center (B.H.T.), TX; University of Miami Leonard Miller School of Medicine, FL (J.M.H.); and Interdisciplinary Stem Cell Institute, Miami, FL (J.M.H.).
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11
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Lucchese A. Streptococcus mutans antigen I/II and autoimmunity in cardiovascular diseases. Autoimmun Rev 2017; 16:456-460. [PMID: 28286107 DOI: 10.1016/j.autrev.2017.03.009] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2017] [Accepted: 02/05/2017] [Indexed: 12/12/2022]
Abstract
Infectious pathogens from the oral cavity cause oral diseases such as caries, gingivitis, periodontitis, endodontic infections, and alveolar osteitis, and often are also concomitant to systemic diseases, including cardiovascular disorders, stroke, preterm birth, diabetes, and pneumonia, among others. The relationship(s) between oral infections and systemic diseases are still unclear. Using the bacterial cell surface antigen I/II from S. mutans and cardiovascular diseases as a model, this study analyzes peptide commonalities that might underlie autoimmune crossreactions between the bacterial antigen and human proteins associated with cardiovascular disorders. The study outlines a vast peptide sharing that calls attention on autoimmune crossreactivity as a possible mechanism by which S. mutans infection might contribute to induce cardiovascular diseases, and, more in general, offers a new approach to investigate the still elusive molecular links between focal oral infections and human systemic diseases.
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Affiliation(s)
- Alberta Lucchese
- Multidisciplinary Department of Medical-Surgical and Odontostomatological Specialties, University of Campania 'Luigi Vanvitelli', Via de Crecchio 6, 80138 Naples, Italy.
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12
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Cardiomyopathy - An approach to the autoimmune background. Autoimmun Rev 2017; 16:269-286. [PMID: 28163240 DOI: 10.1016/j.autrev.2017.01.012] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2016] [Accepted: 11/20/2016] [Indexed: 12/15/2022]
Abstract
Autoimmunity is increasingly accepted as the origin or amplifier of various diseases. In contrast to classic autoantibodies (AABs), which induce immune responses resulting in the destruction of the affected tissue, an additional class of AABs is directed against G-protein-coupled receptors (GPCRs; GPCR-AABs). GPCR-AABs functionally affect their related GPCRs for activation of receptor mediated signal cascades. Diseases which are characterized by the presence of GPCR-AABs with evidence for disease-specific pathogenic activity could be named "functional autoantibody disease". We briefly summarize here the historical view on autoimmunity in cardiomyopathy, followed by an approach to the mechanistic autoimmunity background. Furthermore, autoantibodies with outstanding importance for cardiomyopathies as a functional autoantibody disease, such as GPCR-AABs, and mainly those directed against the beta1-adrenergic and muscarinic 2 receptor autoantibodies, are introduced. Anti-cardiac myosin and anti-cardiac troponin autoantibodies, as further potential players in autoimmune cardiomyopathy, are additionally taken into account. The basic view on the autoantibodies, their related receptor interactions and pathogenic consequences are presented. Focused specifically on GPCR-AABs, "pros and cons" of assays such as indirect assays (functional changes of cell preparations are monitored after GPCR-AAB receptor binding) and direct assays based on the ELISA technologies (GPCR epitope mimics for GPCR-AAB binding) are critically discussed. Last but not least, treatment strategies for "functional autoantibody disease", such as for GPCR-AAB removal (therapeutic plasma exchange, immunoadsorption) and in vivo GPCR-AAB attack such as intravenous IgG treatment (IVIG), B-cell depletion and GPCR-AAB binding and neutralization, are critically reflected with respect to their patient benefits.
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13
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Bornholz B, Roggenbuck D, Jahns R, Boege F. Diagnostic and therapeutic aspects of β1-adrenergic receptor autoantibodies in human heart disease. Autoimmun Rev 2014; 13:954-62. [DOI: 10.1016/j.autrev.2014.08.021] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2014] [Accepted: 06/16/2014] [Indexed: 01/19/2023]
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14
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Lin J, Peng Y, Zhou B, Dou Q, Li Y, Yang H, Zhang L, Rao L. Genetic association of IL-21 polymorphisms with dilated cardiomyopathy in a Han Chinese population. Herz 2014; 40:534-41. [PMID: 24445858 DOI: 10.1007/s00059-013-4039-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2013] [Accepted: 12/08/2013] [Indexed: 02/05/2023]
Abstract
BACKGROUND Autoimmune abnormalities appear to be major predisposing factors for dilated cardiomyopathy (DCM). Interleukin-21 (IL-21) gene polymorphisms have been previously found to be associated with autoimmune diseases. This study aimed to assess the role of IL-21 in DCM in a Han Chinese population. PATIENTS AND METHODS A total of 364 independent DCM patients and 384 unrelated healthy controls were recruited for this case-control association study. rs2055979 and rs12508721 were genotyped by PCR-RFLP. IL-21 plasma levels in samples from DCM and control individuals were evaluated by ELISA. The association between the SNPs and overall survival (OS) was evaluated by Kaplan-Meier analysis. Hazard ratios and 95 % confidence intervals (CIs) were assessed in a Cox regression analysis with adjustment for sex and age. RESULTS The T allele frequencies of both SNPs were higher in DCM patients than in controls (p < 0.001). The genotypic frequencies of rs2055979 G > T and rs12508721 C > T were associated with DCM in the codominant, dominant, and recessive models (p < 0.05). IL-21 plasma levels in patients were higher than those of the control subjects (p = 0.009). The TT genotypes of both SNPs were associated with significantly higher plasma levels (prs2055979 = 0.03, prs12508721 < 0.001). Kaplan-Meier analysis showed that the genotypic frequencies of both SNPs were associated with OS in the dominant and the recessive models (p < 0.001). The TT genotypes of both SNPs were associated with the worst OS (p < 0.001). CONCLUSION Our findings suggest that theIL-21 gene plays an important role in susceptibility to DCM as well as in the clinical outcome of this ailment in the Han Chinese population.
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Affiliation(s)
- J Lin
- Department of Cardiology, West China Hospital, Sichuan University, 610041, Chengdu, P.R. China
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15
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Eckerle LG, Felix SB, Herda LR. Measurement of antibody effects on cellular function of isolated cardiomyocytes. J Vis Exp 2013:e4237. [PMID: 23524642 DOI: 10.3791/4237] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022] Open
Abstract
Dilated cardiomyopathy (DCM) is one of the main causes for heart failure in younger adults. Although genetic disposition and exposition to toxic substances are known causes for this disease in about one third of the patients, the origin of DCM remains largely unclear. In a substantial number of these patients, autoantibodies against cardiac epitopes have been detected and are suspected to play a pivotal role in the onset and progression of the disease. The importance of cardiac autoantibodies is underlined by a hemodynamic improvement observed in DCM patients after elimination of autoantibodies by immunoadsorption. A variety of specific antigens have already been identified and antibodies against these targets may be detected by immunoassays. However, these assays cannot discriminate between stimulating (and therefore functionally effective) and blocking autoantibodies. There is increasing evidence that this distinction is crucial. It can also be assumed that the targets for a number of cardiotropic antibodies are still unidentified and therefore cannot be detected by immunoassays. Therefore, we established a method for the detection of functionally active cardiotropic antibodies, independent of their respective antigen. The background for the method is the high homology usually observed for functional regions of cardiac proteins in between mammals. This suggests that cardiac antibodies directed against human antigens will cross-react with non-human target cells, which allows testing of IgG from DCM patients on adult rat cardiomyocytes. Our method consists of 3 steps: first, IgG is isolated from patient plasma using sepharose coupled anti-IgG antibodies obtained from immunoadsorption columns (PlasmaSelect, Teterow, Germany). Second, adult cardiomyocytes are isolated by collagenase perfusion in a Langendorff perfusion apparatus using a protocol modified from previous works. The obtained cardiomyocytes are attached to laminin-coated chambered coverglasses and stained with Fura-2, a calcium-selective fluorescent dye which can be easily brought into the cell to observe intracellular calcium (Ca(2+)) contents. In the last step, the effect of patient IgG on the cell shortening and Ca(2+) transients of field stimulated cardiomyocytes is monitored online using a commercial myocyte calcium and contractility monitoring system (IonOptix, Milton, MA, USA) connected to a standard inverse fluorescent microscope.
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Affiliation(s)
- Lars G Eckerle
- Department of Internal Medicine B, University Medicine Greifswald
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16
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Peng Y, Zhou B, Wang YY, Shi S, Zhang K, Zhang L, Rao L. Analysis of IL-17 gene polymorphisms in Chinese patients with dilated cardiomyopathy. Hum Immunol 2013; 74:635-9. [PMID: 23376081 DOI: 10.1016/j.humimm.2013.01.019] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2012] [Revised: 12/04/2012] [Accepted: 01/24/2013] [Indexed: 02/05/2023]
Abstract
Cardiomyopathy is one of the major causes of sudden death and/or progressive heart failure. Dilated cardiomyopathy (DCM), comprising 60% of the cases of identified cardiomyopathy, is the most common form of heart muscle disease. Interleukin 17 (IL-17) is a proinflammatory cytokine that has been implicated in the pathogenesis of various diseases. To evaluate the influence of IL-17A and IL-17F gene polymorphisms on the risk of DCM, a case-control study was conducted in a Chinese Han population. The TaqMan® SNP Genotyping Assay was used to genotype the SNP rs2275913 of IL-17A and SNP rs763780 of IL-17F in 288 DCM patients and 421 ethnicity-matched controls. No significant difference in genotypic and allelic frequencies between DCM patients and control subjects was observed. However, Results of stratified analysis revealed that rs763780 was associated with male DCM patients in a dominant genetic model (p=0.031, OR=1.83, 95% CI=1.04-3.22). Our results suggest that the tested two IL-17 SNPs, rs2275913 and rs763780, are not found to be associated with DCM in the Chinese population studied.
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Affiliation(s)
- Ying Peng
- Department of Cardiology, West China Hospital of Sichuan University, Chengdu, PR China
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17
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Wilson DW, Oslund KL, Lyons B, Foreman O, Burzenski L, Svenson KL, Chase TH, Shultz LD. Inflammatory dilated cardiomyopathy in Abcg5-deficient mice. Toxicol Pathol 2012; 41:880-92. [PMID: 23129576 DOI: 10.1177/0192623312466191] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Dilated cardiomyopathy (DCM) in A/J mice homozygous for the spontaneous thrombocytopenia and cardiomyopathy (trac) mutation results from a single base pair change in the Abcg5 gene. A similar mutation in humans causes sitosterolemia with high plant sterol levels, hypercholesterolemia, and early onset atherosclerosis. Analyses of CD3+ and Mac-3+ cells and stainable collagen in hearts showed inflammation and myocyte degeneration in A/J-trac/trac mice beginning postweaning and progressed to marked dilative and fibrosing cardiomyopathy by 140 days. Transmission electron microscopy (TEM) demonstrated myocyte vacuoles consistent with swollen endoplasmic reticulum (ER). Myocytes with cytoplasmic glycogen and irregular actinomyosin filament bundles formed mature intercalated disks with normal myocytes suggesting myocyte repair. A/J-trac/trac mice fed lifelong phytosterol-free diets did not develop cardiomyopathy. BALB/cByJ-trac/trac mice had lesser inflammatory infiltrates and later onset DCM. BALB/cByJ-trac/trac mice changed from normal to phytosterol-free diets had lesser T cell infiltrates but persistent monocyte infiltrates and equivalent fibrosis to mice on normal diets. B- and T-cell-deficient BALB/cBy-Rag1(null) trac/trac mice fed normal diets did not develop inflammatory infiltrates or DCM. We conclude that the trac/trac mouse has many features of inflammatory DCM and that the reversibility of myocardial T cell infiltration provides a novel model for investigating the progression of myocardial fibrosis.
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Affiliation(s)
- Dennis W Wilson
- Department of Pathology Microbiology and Immunology, School of Veterinary Medicine, University of California-Davis, CA 95616, USA.
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18
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Herda LR, Felix SB, Boege F. Drug-like actions of autoantibodies against receptors of the autonomous nervous system and their impact on human heart function. Br J Pharmacol 2012; 166:847-57. [PMID: 22220626 PMCID: PMC3412294 DOI: 10.1111/j.1476-5381.2012.01828.x] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023] Open
Abstract
Antibodies against cholinergic and adrenergic receptors (adrenoceptors) are frequent in serum of patients with chronic heart failure. Their prevalence is associated with Chagas' disease, idiopathic dilated cardiomyopathy (DCM), and ischaemic heart disease. Among the epitopes targeted are first and second extracellular loops of the β-adrenergic (β-adrenoceptor) and M2 muscarinic receptor. β1-adrenoceptor autoantibodies affect radioligand binding and cardiomyocyte function similar to agonists. Corresponding rodent immunizations induce symptoms compatible with chronic heart failure that are reversible upon removal of the antibodies, transferable via the serum and abrogated by adrenergic antagonists. In DCM patients, prevalence and stimulatory efficacy of β1-adrenoceptor autoantibodies are correlated to the decline in cardiac function, ventricular arrhythmia and higher incidence of cardiac death. In conclusion, such autoantibodies seem to cause or promote chronic human left ventricular dysfunction by acting on their receptor targets in a drug-like fashion. However, the pharmacology of this interaction is poorly understood. It is unclear how the autoantibodies trigger changes in receptor activity and second messenger coupling and how that is related to the pathogenesis and severity of the associated diseases. Here, we summarize the available evidence regarding these issues and discuss these findings in the light of recent knowledge about the conformational activation of the human β2-adrenoceptor and the properties of bona fide cardiopathogenic autoantibodies derived from immune-adsorption therapy of DCM patients. These considerations might contribute to the conception of therapy regimen aimed at counteracting or neutralizing cardiopathogenic receptor autoantibodies.
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Affiliation(s)
- L R Herda
- Department of Internal Medicine B, University of Greifswald, Greifswald, Germany
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19
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La inmunoadsorción: ¿alternativa o adyuvante del tratamiento quirúrgico? CIRUGIA CARDIOVASCULAR 2011. [DOI: 10.1016/s1134-0096(11)70066-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
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20
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Doesch AO, Mueller S, Nelles M, Konstandin M, Celik S, Frankenstein L, Goeser S, Kaya Z, Koch A, Zugck C, Katus HA. Impact of troponin I-autoantibodies in chronic dilated and ischemic cardiomyopathy. Basic Res Cardiol 2010; 106:25-35. [PMID: 20957484 DOI: 10.1007/s00395-010-0126-z] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/25/2010] [Revised: 09/27/2010] [Accepted: 10/05/2010] [Indexed: 10/18/2022]
Abstract
The aim of this study was to investigate the prognostic value of circulating troponin I (TNI)-autoantibodies in plasma of patients with chronic heart failure. Sera of 390 heart failure patients were tested for the presence of anti-TNI antibodies by enzyme-linked immunosorbent assay (ELISA), including 249 (63.8% of total) patients with dilated cardiomyopathy (DCM) and 141 (36.2% of total) patients with ischemic cardiomyopathy (ICM). A total of 72 patients (18.5% of total) were female and 318 (81.5% of total) were male. Mean patient age was 54.6 ± 11.3 years and mean follow-up time was 3.8 ± 3.2 years. TNI-autoantibodies (titer of ≥1:40) were detected in 73 out of 390 patients (18.7% of total). In TNI-autoantibody positive patients mean left ventricular ejection fraction (LVEF) was 27.6 ± 5.8%, compared to 25.8 ± 5.9% in TNI-autoantibody negative patients, P = 0.03. The combined end-point of death (n = 118, 30.3% of total) or heart transplantation (HTX) (n = 44, 11.3% of total) was reached in 162 patients (41.5% of total). Kaplan-Meier analysis demonstrated superior survival (combined end-point of death or HTX) in patients with DCM versus ICM (P = 0.0198) and TNI-autoantibody positive patients versus TNI-autoantibody negative patients (P = 0.0348). Further subgroup analysis revealed a favorable outcome in TNI-positive patients with heart failure if the patients suffered from DCM (P = 0.0334), whereas TNI-autoantibody status in patients with ICM was not associated with survival (P = 0.8486). In subsequent multivariate Weibull-analysis, a positive TNI serostatus was associated with a significantly lower all-cause mortality in DCM patients (P = 0.0492). The presence of TNI-autoantibodies in plasma is associated with an improved survival in patients with chronic DCM, but not ICM. This might possibly indicate a prophylactic effect of TNI-autoantibodies in this subgroup of patients, encouraging further studies into possible protective effects of antibodies against certain cardiac target structures.
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Affiliation(s)
- Andreas O Doesch
- Department of Cardiology, University of Heidelberg, 69120 Heidelberg, Germany.
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21
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Doesch AO, Mueller S, Konstandin M, Celik S, Kristen A, Frankenstein L, Goeser S, Kaya Z, Zugck C, Dengler TJ, Katus HA. Effects of protein A immunoadsorption in patients with chronic dilated cardiomyopathy. J Clin Apher 2010; 25:315-22. [PMID: 20824621 DOI: 10.1002/jca.20263] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2010] [Accepted: 07/16/2010] [Indexed: 11/10/2022]
Abstract
OBJECTIVES The objective of this study was to investigate functional effects of immunoadsorption (IA) in patients with chronic nonfamilial dilated cardiomyopathy (DCM) regarding clinical and humoral markers of heart failure. BACKGROUND IA has been shown to induce early hemodynamic improvement in patients with nonfamilial dilated cardiomyopathy (DCM). METHODS We performed IA using protein A agarose columns on five consecutive days in 51 patients with chronic DCM, congestive heart failure of NYHA class ≥ II, left ventricular ejection fraction ≤50%, and mean time since initial diagnosis of 5.0 ± 5.8 years. RESULTS Immediately after IA, immunoglobulin G (IgG) decreased by 89.4% and IgG3 by 66.7% (both P < 0.0001). Median NT-pro BNP was reduced from 1230.0 ng L(-1) at baseline to 829.0 ng L(-1) after 6 months (P < 0.0001). Also mean left ventricular ejection fraction (LVEF) was significantly improved (26.3% ± 9.4% to 28.7% ± 11.4% after 6 months, P = 0.016) and LVEF improved ≥5% (absolute) in 21 of 51 (41.2%) patients. After 6 months, bicycle spiroergometry showed a significant increase in exercise capacity from 82.0 ± 30.8 Watts to 93.1 ± 34.3 Watts (P = 0.008) while VO2max rose from 15.0 ± 4.1 to 16.4 ± 4.8 mL min(-1) kg(-1) (P = 0.01). CONCLUSIONS In this study, on heart failure patients with nonfamilial DCM, IA therapy significantly improved clinical and humoral markers of heart failure severity. These promising results may be due to the selected study population, with a shorter disease duration and the higher amount of IgG 3 reduction. Future blinded prospective multicenter studies are necessary to identify those patients that benefit most.
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Affiliation(s)
- Andreas O Doesch
- Department of Cardiology, University of Heidelberg, 69120 Heidelberg, Germany.
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22
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Doesch AO, Konstandin M, Celik S, Kristen A, Frankenstein L, Hardt S, Goeser S, Kaya Z, Katus HA, Dengler TJ. Effects of protein A immunoadsorption in patients with advanced chronic dilated cardiomyopathy. J Clin Apher 2009; 24:141-9. [PMID: 19591221 DOI: 10.1002/jca.20204] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
OBJECTIVES The objective of this study was to investigate functional effects of immunoadsorption (IA) in severely limited study patients with chronic nonfamilial dilated cardiomyopathy (DCM), and to analyze the prevalence of Troponin I (TNI) autoantibodies. BACKGROUND Immunoadsorption (IA) has been shown to induce early hemodynamic improvement in patients with nonfamilial DCM. METHODS We performed IA using Immunosorba columns on five consecutive days in 27 patients with chronic DCM, congestive heart failure of NYHA class >or=II, left ventricular ejection fraction below 40%, and mean time since initial diagnosis of 7.2 +/- 6.8 years. RESULTS Immediately after IA, IgG decreased by 87.7% and IgG3 by 58.5%. Median NT-pro BNP was reduced from 1740.0 ng/L at baseline to 1504.0 ng/L after 6 months (P = 0.004). Mean left ventricular ejection fraction (LVEF) was not significantly improved overall (24.1 +/- 7.8% to 25.4 +/- 10.4% after 6 months, P = 0.38), but LVEF improved >or=5% (absolute) in 9 of 27 (33%) patients. Bicycle spiroergometry showed a significant increase in exercise capacity from 73.7 +/- 29.4 Watts to 88.8 +/- 31.1 Watts (P = 0.003) after 6 months while VO2max rose from 13.7 +/- 3.8 to 14.9 +/- 3.0 mL/min kg after 6 months (P = 0.09). Subgroup analysis revealed a higher NT-pro BNP reduction in patients with shorter disease duration (P = 0.03) and without TNI autoantibodies at baseline (P = 0.05). All 9 patients with an absolute increase of LVEF of >or=5.0% were diabetic (P = 0.0001). CONCLUSIONS In this study, on severely limited heart failure patients with nonfamilial DCM, IA therapy moderately improved markers of heart failure severity in a limited subgroup of patients. This may be due to the selected study population with end-stage heart failure patients and the lower reduction of IgG3 compared to previous studies. Future blinded multicenter studies are necessary to identify those patients that benefit most.
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Affiliation(s)
- Andreas O Doesch
- Department of Cardiology, University of Heidelberg, Heidelberg, Germany.
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23
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Leuschner F, Katus HA, Kaya Z. Autoimmune myocarditis: past, present and future. J Autoimmun 2009; 33:282-9. [PMID: 19679447 DOI: 10.1016/j.jaut.2009.07.009] [Citation(s) in RCA: 57] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2009] [Accepted: 07/15/2009] [Indexed: 01/22/2023]
Abstract
Heart failure has become an increasingly prevalent disorder with considerable morbidity and mortality. While many causal mechanisms such as inherited cardiomyopathies, ischemic cardiomyopathy or muscular overload are easily identified in clinical practice, the molecular mechanisms that determine the progression of heart failure or ventricular remodelling are largely unknown. Autoimmune responses and inflammation are involved in the pathogenesis of many cardiovascular diseases. There is compelling evidence that inflammatory mechanisms may contribute to progressive heart failure. Thus, myocardial infiltration of lymphocytes and mononuclear cells, increased expression of pro-inflammatory chemokines and cytokines and circulating autoantibodies are frequently observed in myocarditis and dilated cardiomyopathy. In this review we give an overview on myocarditis and describe why diagnosis and treatment of myocarditis in the clinic can be difficult. We present current animal models and describe possible experimental approaches to improve diagnosis. Finally, we give an outlook on possible drug targets by describing the latest findings in the animal models focussing on chemokines and cytokines, T cell responses and interactions, tolerance induction and the development of autoantibodies.
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Affiliation(s)
- Florian Leuschner
- Department of Cardiology, University of Heidelberg, 69120 Heidelberg, Germany
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24
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Nussinovitch U, Shoenfeld Y. Autoimmunity and heart diseases: pathogenesis and diagnostic criteria. Arch Immunol Ther Exp (Warsz) 2009; 57:95-104. [PMID: 19333734 DOI: 10.1007/s00005-009-0013-1] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2008] [Accepted: 12/05/2008] [Indexed: 12/11/2022]
Abstract
Autoimmunity may evolve in predisposed individuals following an exogenous trigger. Autoimmunity is affected by genetic, immune, hormonal, and environmental factors. Immune mechanisms in heart diseases are complex and often not completely understood. Several cardiac disorders are believed to be mediated by an immune reaction. Both humoral and cellular immunity are associated with the development of myocarditis, dilated cardiomyopathy, heart failure, rheumatic fever, and atherosclerosis. Here the diagnostic criteria and autoimmune aspects of autoimmune-mediated cardiac disorders are reviewed. New diagnostic criteria for "autoimmune dilated cardiomyopathy" were recently suggested by the authors. They presume that establishing a dominant autoimmune etiology in some patients will have clinical significance because these patients will potentially gain the greatest benefit from immunosuppressive and immunomodulating treatments.
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Affiliation(s)
- Udi Nussinovitch
- Department of Medicine B, Chaim Sheba Medical Center, Tel-Hashomer, Israel
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