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Sun W, Han B, Cai D, Wang J, Jiang D, Jia H. Differential Expression Profiles and Functional Prediction of Circular RNAs in Pediatric Dilated Cardiomyopathy. Front Mol Biosci 2021; 7:600170. [PMID: 33392258 PMCID: PMC7775584 DOI: 10.3389/fmolb.2020.600170] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2020] [Accepted: 11/03/2020] [Indexed: 12/15/2022] Open
Abstract
Circular RNAs (circRNAs) have emerged as essential regulators and biomarkers in various diseases. To assess the different expression levels of circRNAs in pediatric dilated cardiomyopathy (PDCM) and explore their biological and mechanistic significance, we used RNA microarrays to identify differentially expressed circRNAs between three children diagnosed with PDCM and three healthy age-matched volunteers. The biological function of circRNAs was assessed with a circRNA–microRNA (miRNA)–mRNA interaction network constructed from Gene Ontology and the Kyoto Encyclopedia of Genes and Genomes. Differentially expressed circRNAs were validated by quantitative real-time polymerase chain reaction (qRT-PCR) in 25 children with PDCM and 25 healthy volunteers. We identified 257 up-regulated (fold change ≤ 0.5, P < 0.05) and 899 down-regulated (fold change ≥2, P < 0.05) circRNAs in PDCM patients when compared to healthy volunteers. The qRT-PCR experiments confirmed has_circ_0067735 down-regulation (0.45-fold, P < 0.001), has_circ_0070186 up-regulation (2.82-fold, P < 0.001), and has_circ_0069972 down-regulation (0.50-fold, P < 0.05). A functional analysis of these differentially expressed circRNAs suggests that they are associated with hypertrophy, remodeling, fibrosis, and autoimmunity. CircRNAs have been implicated in PDCM through largely unknown mechanisms. Here we report differentially expressed circRNAs in PDCM patients that may illuminate the mechanistic roles in the etiology of PDCM that could serve as non-invasive diagnostic biomarkers.
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Affiliation(s)
- Wei Sun
- Department of Pediatric Cardiology, Shandong Provincial Hospital, Cheeloo College of Medicine, Shandong University, Jinan, China
| | - Bo Han
- Department of Pediatric Cardiology, Shandong Provincial Hospital, Cheeloo College of Medicine, Shandong University, Jinan, China
| | - Dongxiao Cai
- Department of Pediatric Cardiology, Shandong Provincial Hospital, Cheeloo College of Medicine, Shandong University, Jinan, China
| | - Jing Wang
- Department of Pediatric Cardiology, Shandong Provincial Hospital, Cheeloo College of Medicine, Shandong University, Jinan, China
| | - Diandong Jiang
- Department of Pediatric Cardiology, Shandong Provincial Hospital, Cheeloo College of Medicine, Shandong University, Jinan, China
| | - Hailin Jia
- Department of Pediatric Cardiology, Shandong Provincial Hospital, Cheeloo College of Medicine, Shandong University, Jinan, China
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Katzmann JL, Schlattmann P, Rigopoulos AG, Noutsias E, Bigalke B, Pauschinger M, Tschope C, Sedding D, Schulze PC, Noutsias M. Meta-analysis on the immunohistological detection of inflammatory cardiomyopathy in endomyocardial biopsies. Heart Fail Rev 2019; 25:277-294. [DOI: 10.1007/s10741-019-09835-9] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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Tang TT, Zhu YC, Dong NG, Zhang S, Cai J, Zhang LX, Han Y, Xia N, Nie SF, Zhang M, Lv BJ, Jiao J, Yang XP, Hu Y, Liao YH, Cheng X. Pathologic T-cell response in ischaemic failing hearts elucidated by T-cell receptor sequencing and phenotypic characterization. Eur Heart J 2019; 40:3924-3933. [PMID: 31365073 DOI: 10.1093/eurheartj/ehz516] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/13/2019] [Revised: 05/21/2019] [Accepted: 07/04/2019] [Indexed: 01/09/2023] Open
Abstract
Abstract
Aims
A persistent cardiac T-cell response initiated by myocardial infarction is linked to subsequent adverse ventricular remodelling and progression of heart failure. No data exist on T-cell receptor (TCR) repertoire changes in combination with phenotypic characterization of T cells in ischaemic failing human hearts.
Methods and results
Analysis of TCR repertoire with high-throughput sequencing revealed that compared with T cells in control hearts, those in ischaemic failing hearts showed a clonally expanded TCR repertoire but similar usage patterns of TRBV-J rearrangements and V gene segments; compared with T cells in peripheral blood, those in ischaemic failing hearts exhibited a restricted and clonally expanded TCR repertoire and different usage patterns of TRBV-J rearrangements and V gene segments, suggesting the occurrence of tissue-specific T-cell expansion in ischaemic failing hearts. Consistently, TCR clonotype sharing was prominent in ischaemic failing hearts, especially in hearts of patients who shared human leucocyte antigen (HLA) alleles. Furthermore, ischaemia heart failure (IHF) heart-associated clonotypes were more frequent in peripheral blood of IHF patients than in that of controls. Heart-infiltrating T cells displayed memory- and effector-like characteristics. Th1 cells were the predominant phenotype among CD4+ T cells; CD8+ T cells were equally as abundant as CD4+ T cells and produced high levels of interferon-γ, granzyme B, and perforin.
Conclusion
We provide novel evidence for a tissue-specific T-cell response predominated by Th1 cells and cytotoxic CD8+ T cells in ischaemic failing human hearts that may contribute to the progression of heart failure.
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Affiliation(s)
- Ting-Ting Tang
- Department of Cardiology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, 1277 Jiefang Avenue, Wuhan 430022, China
- Key Laboratory of Biological Targeted Therapy of the Ministry of Education, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, 1277 Jiefang Avenue, Wuhan 430022, China
| | - Yi-Cheng Zhu
- Department of Cardiology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, 1277 Jiefang Avenue, Wuhan 430022, China
- Key Laboratory of Biological Targeted Therapy of the Ministry of Education, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, 1277 Jiefang Avenue, Wuhan 430022, China
| | - Nian-Guo Dong
- Department of Cardiovascular Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, 1277 Jiefang Avenue, Wuhan 430022, China
| | - Si Zhang
- Department of Cardiology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, 1277 Jiefang Avenue, Wuhan 430022, China
- Key Laboratory of Biological Targeted Therapy of the Ministry of Education, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, 1277 Jiefang Avenue, Wuhan 430022, China
| | - Jie Cai
- Department of Cardiovascular Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, 1277 Jiefang Avenue, Wuhan 430022, China
| | - Ling-Xue Zhang
- Department of Cardiology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, 1277 Jiefang Avenue, Wuhan 430022, China
- Key Laboratory of Biological Targeted Therapy of the Ministry of Education, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, 1277 Jiefang Avenue, Wuhan 430022, China
| | - Yue Han
- Department of Cardiology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, 1277 Jiefang Avenue, Wuhan 430022, China
- Key Laboratory of Biological Targeted Therapy of the Ministry of Education, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, 1277 Jiefang Avenue, Wuhan 430022, China
| | - Ni Xia
- Department of Cardiology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, 1277 Jiefang Avenue, Wuhan 430022, China
- Key Laboratory of Biological Targeted Therapy of the Ministry of Education, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, 1277 Jiefang Avenue, Wuhan 430022, China
| | - Shao-Fang Nie
- Department of Cardiology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, 1277 Jiefang Avenue, Wuhan 430022, China
- Key Laboratory of Biological Targeted Therapy of the Ministry of Education, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, 1277 Jiefang Avenue, Wuhan 430022, China
| | - Min Zhang
- Department of Cardiology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, 1277 Jiefang Avenue, Wuhan 430022, China
- Key Laboratory of Biological Targeted Therapy of the Ministry of Education, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, 1277 Jiefang Avenue, Wuhan 430022, China
| | - Bing-Jie Lv
- Department of Cardiology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, 1277 Jiefang Avenue, Wuhan 430022, China
- Key Laboratory of Biological Targeted Therapy of the Ministry of Education, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, 1277 Jiefang Avenue, Wuhan 430022, China
| | - Jiao Jiao
- Department of Cardiology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, 1277 Jiefang Avenue, Wuhan 430022, China
- Key Laboratory of Biological Targeted Therapy of the Ministry of Education, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, 1277 Jiefang Avenue, Wuhan 430022, China
| | - Xiang-Ping Yang
- Department of Immunology, Tongji Medical College, Huazhong University of Science and Technology, 13 Hangkong Road, Wuhan 430030, China
| | - Yu Hu
- Department of Hematology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, 1277 Jiefang Avenue, Wuhan 430022, China
| | - Yu-Hua Liao
- Department of Cardiology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, 1277 Jiefang Avenue, Wuhan 430022, China
- Key Laboratory of Biological Targeted Therapy of the Ministry of Education, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, 1277 Jiefang Avenue, Wuhan 430022, China
| | - Xiang Cheng
- Department of Cardiology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, 1277 Jiefang Avenue, Wuhan 430022, China
- Key Laboratory of Biological Targeted Therapy of the Ministry of Education, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, 1277 Jiefang Avenue, Wuhan 430022, China
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Escher F, Kühl U, Lassner D, Stroux A, Gross U, Westermann D, Pieske B, Poller W, Schultheiss HP. High Perforin-Positive Cardiac Cell Infiltration and Male Sex Predict Adverse Long-Term Mortality in Patients With Inflammatory Cardiomyopathy. J Am Heart Assoc 2017; 6:e005352. [PMID: 28862949 PMCID: PMC5586411 DOI: 10.1161/jaha.116.005352] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/16/2016] [Accepted: 06/05/2017] [Indexed: 01/06/2023]
Abstract
BACKGROUND The authors analyzed the effects of perforin-dependent infiltration on long-term mortality in patients with inflammatory cardiomyopathy (CMi). We previously demonstrated that left ventricular function deteriorates and progresses to substantial cardiac dysfunction in patients with perforin-positive cardiac cell infiltration. METHODS AND RESULTS Between 2003 and 2013, 2389 consecutive patients with clinically suspected CMi who underwent endomyocardial biopsies were enrolled. Endomyocardial biopsies were performed at first admission after exclusion of ischemic or valvular heart disease, and CMi was confirmed in 1717 patients. Follow-up was up to 10.1 years (median 0.47 years; interquartile range, 0.03-2.56 years) and information on vital status was obtained from official resident data files. Multivariable statistical analysis was conducted for all patients with CMi regarding significant predictors of all-cause mortality or need for heart transplantation. Multiple Cox regression analysis revealed perforin above the calculated cutoff point of 2.9 cells/mm² as a strong predictor of impaired survival with a hazard ratio of 1.881 (95% confidence interval, 1.177-3.008; P=0.008), independent of left ventricular function and other myocardial inflammation markers (CD3, macrophage-1 antigen, leukocyte function-associated antigen-1, human leukocyte antigen-1, and intercellular cell adhesion molecule-1). Unexpectedly, male sex emerged as another strong adverse predictor of survival in CMi (hazard ratio, 1.863; confidence interval, 1.096-3.168 [P=0.022]). Whereas left ventricular ejection fraction course is adversely affected by myocardial perforin, multivariate analysis indicates that left ventricular ejection fraction explains only part of the observed overall mortality. CONCLUSIONS High perforin-positive cardiac cell infiltration and male sex are independent adverse predictors of long-term mortality in CMi. Furthermore, exact quantification of immunohistochemically detected infiltrates is necessary to assess the prognosis.
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Affiliation(s)
- Felicitas Escher
- Institute for Cardiac Diagnostics and Therapy (IKDT), Berlin, Germany
- Department of Cardiology, Charité, CVK--Universitätsmedizin Berlin, Berlin, Germany
- DZHK (German Center for Cardiovascular Research), partner side Berlin partner side Hamburg, Germany
| | - Uwe Kühl
- Institute for Cardiac Diagnostics and Therapy (IKDT), Berlin, Germany
- Department of Cardiology, Charité, CVK--Universitätsmedizin Berlin, Berlin, Germany
| | - Dirk Lassner
- Institute for Cardiac Diagnostics and Therapy (IKDT), Berlin, Germany
| | - Andrea Stroux
- Institute for Biometry and Clinical Epidemiology, Charité--Universitätsmedizin Berlin, Berlin, Germany
| | - Ulrich Gross
- Institute for Cardiac Diagnostics and Therapy (IKDT), Berlin, Germany
| | - Dirk Westermann
- University Heart Center Hamburg, Hamburg, Germany
- DZHK (German Center for Cardiovascular Research), partner side Berlin partner side Hamburg, Germany
| | - Burkert Pieske
- Department of Cardiology, Charité, CVK--Universitätsmedizin Berlin, Berlin, Germany
- Department of Cardiology, Deutsches Herzzentrum Berlin (DHZB), Berlin, Germany
- DZHK (German Center for Cardiovascular Research), partner side Berlin partner side Hamburg, Germany
| | - Wolfgang Poller
- Department of Cardiology, Charité, CBF--Universitätsmedizin Berlin, Berlin, Germany
- DZHK (German Center for Cardiovascular Research), partner side Berlin partner side Hamburg, Germany
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Escher F, Kühl U, Lassner D, Poller W, Westermann D, Pieske B, Tschöpe C, Schultheiss HP. Long-term outcome of patients with virus-negative chronic myocarditis or inflammatory cardiomyopathy after immunosuppressive therapy. Clin Res Cardiol 2016; 105:1011-1020. [DOI: 10.1007/s00392-016-1011-z] [Citation(s) in RCA: 59] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/12/2016] [Accepted: 06/10/2016] [Indexed: 11/30/2022]
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Escher F, Kühl U, Lassner D, Stroux A, Westermann D, Skurk C, Tschöpe C, Poller W, Schultheiss HP. Presence of perforin in endomyocardial biopsies of patients with inflammatory cardiomyopathy predicts poor outcome. Eur J Heart Fail 2014; 16:1066-72. [PMID: 25163698 DOI: 10.1002/ejhf.148] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/14/2014] [Revised: 07/06/2014] [Accepted: 07/11/2014] [Indexed: 12/17/2022] Open
Abstract
AIMS Intramyocardial inflammation is considered an adverse prognostic factor in inflammatory cardiomyopathy (CMi). However, the precise nature of immune system factors relevant for the prediction of long-term course remains elusive. The aim of this study was to analyse the prognostic relevance of perforin in a large cohort of patients with CMi. METHODS AND RESULTS We investigated 495 consecutive patients with suspected CMi, undergoing endomyocardial biopsies (EMBs), and examined haemodynamic measurements after a long follow-up period (interquartile range 10.2-37.1 months). In EMBs, myocardial inflammation was assessed by histology and immunohistology. At follow-up, 388 patients (Group I) showed stable mild dysfunction or significant improvement, with LVEF rising from 46.2 ± 14.8% to 64.3 ± 12.3% (P < 0.0001). Lack of improvement of LV function or significant deterioration of LVEF from 42.1 ± 14.2% to 32.3 ± 11.6% (P < 0.0001) was observed in 107 patients (Group II). Multivariable statistical analysis of LVEF and immunohistochemical parameters in all patients revealed that the single most important predictor of LVEF development was detection of perforin in EMBs, with an odds ratio (OR) of 7.922 [95% confidence interval (CI) 4.380-14.326; P < 0.001] for deteriorating LVEF. Importantly, baseline LVEF (OR 0.962), LV end-diastolic diameter (OR 1.847), and other immmunohistochemical parameters (CD3, Mac-1, CD45R0, LFA-1, HLA-1, and ICAM-1) made minor or insignificant contributions to LVEF course in these 495 patients. CONCLUSIONS In this EMB-based analysis of the long-term course of CMi we identified, for the first time, that detection of perforin in the myocardium is a key predictor of LVEF course.
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Affiliation(s)
- Felicitas Escher
- Department of Cardiology and Pneumology, CBF, Charité-Universitätsmedizin Berlin, Berlin, Germany
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Noutsias M, Rohde M, Göldner K, Block A, Blunert K, Hemaidan L, Hummel M, Blohm JH, Lassner D, Kühl U, Schultheiss HP, Volk HD, Kotsch K. Expression of functional T-cell markers and T-cell receptor Vbeta repertoire in endomyocardial biopsies from patients presenting with acute myocarditis and dilated cardiomyopathy. Eur J Heart Fail 2014; 13:611-8. [DOI: 10.1093/eurjhf/hfr014] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
Affiliation(s)
- Michel Noutsias
- Department of Cardiology and Pneumonology; CharitéCentrum 11 for Cardiovascular Medicine, Charité - Universitätsmedizin Berlin, Campus Benjamin Franklin; Hindenburgdamm 30, D-12200 Berlin Germany
| | - Maria Rohde
- Department of Cardiology and Pneumonology; CharitéCentrum 11 for Cardiovascular Medicine, Charité - Universitätsmedizin Berlin, Campus Benjamin Franklin; Hindenburgdamm 30, D-12200 Berlin Germany
| | - Katrin Göldner
- Institute of Medical Immunology and Berlin-Brandenburg Center for Regenerative Therapies (BCRT); Charité - Universitätsmedizin Berlin, Campus Virchow Clinic; Augustenburger Platz 1, D-13353 Berlin Germany
| | - Andrea Block
- Department of Cardiology and Pneumonology; CharitéCentrum 11 for Cardiovascular Medicine, Charité - Universitätsmedizin Berlin, Campus Benjamin Franklin; Hindenburgdamm 30, D-12200 Berlin Germany
| | - Katja Blunert
- Department of Cardiology and Pneumonology; CharitéCentrum 11 for Cardiovascular Medicine, Charité - Universitätsmedizin Berlin, Campus Benjamin Franklin; Hindenburgdamm 30, D-12200 Berlin Germany
- Department of Pathology; Charité - Universitätsmedizin Berlin, Campus Benjamin Franklin; Hindenburgdamm 30, D-12200 Berlin Germany
| | - Lara Hemaidan
- Department of Cardiology and Pneumonology; CharitéCentrum 11 for Cardiovascular Medicine, Charité - Universitätsmedizin Berlin, Campus Benjamin Franklin; Hindenburgdamm 30, D-12200 Berlin Germany
| | - Michael Hummel
- Department of Pathology; Charité - Universitätsmedizin Berlin, Campus Benjamin Franklin; Hindenburgdamm 30, D-12200 Berlin Germany
| | - Jan-Henrik Blohm
- Department of Cardiology and Pneumonology; CharitéCentrum 11 for Cardiovascular Medicine, Charité - Universitätsmedizin Berlin, Campus Benjamin Franklin; Hindenburgdamm 30, D-12200 Berlin Germany
| | - Dirk Lassner
- Institute of Cardiac Diagnostics and Therapy; Moltkestrasse 31, D-12203 Berlin Germany
| | - Uwe Kühl
- Department of Cardiology and Pneumonology; CharitéCentrum 11 for Cardiovascular Medicine, Charité - Universitätsmedizin Berlin, Campus Benjamin Franklin; Hindenburgdamm 30, D-12200 Berlin Germany
| | - Heinz-Peter Schultheiss
- Department of Cardiology and Pneumonology; CharitéCentrum 11 for Cardiovascular Medicine, Charité - Universitätsmedizin Berlin, Campus Benjamin Franklin; Hindenburgdamm 30, D-12200 Berlin Germany
| | - Hans-Dieter Volk
- Institute of Medical Immunology and Berlin-Brandenburg Center for Regenerative Therapies (BCRT); Charité - Universitätsmedizin Berlin, Campus Virchow Clinic; Augustenburger Platz 1, D-13353 Berlin Germany
| | - Katja Kotsch
- Institute of Medical Immunology and Berlin-Brandenburg Center for Regenerative Therapies (BCRT); Charité - Universitätsmedizin Berlin, Campus Virchow Clinic; Augustenburger Platz 1, D-13353 Berlin Germany
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Blohm JH, Blohm N, Hummel M, Müller HH, Rohde M, Hetzer R, Lehmkuhl H, Noutsias M. Detection of clonal T-cell-receptor (TCR) Vbeta rearrangements in explanted dilated cardiomyopathy hearts by semi-nested PCR, GeneScan, and direct sequencing. Med Sci Monit Basic Res 2013; 19:111-7. [PMID: 23524509 PMCID: PMC3640101 DOI: 10.12659/msmbr.883851] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Background Viral infection and anti-cardiac immunity are involved in the pathogenesis of dilated cardiomyopathy (DCM). Immunity targeting particular antigens may evoke expansion of reactive T-cell clones. Material/Methods Myocardial tissues from explanted hearts were investigated for clonal T-cell-receptor- (TCR-) β rearrangements by an established semi-nested polymerase chain reaction (PCR), followed by high-resolution GeneScan analysis and direct sequencing. From 17 explanted DCM hearts, 3 myocardial samples each were obtained from the right ventricle, the septum, and the left ventricle (total: 9 myocardial samples per case). Six explanted hearts with non-DCM cardiomyopathy entities served as controls. Results GeneScan analysis revealed polyclonal TCR-β rearrangements in all controls. In contrast, at least 1 myocardial sample in 9 out of 17 DCM hearts (total: 20 of the 81 DCM specimens) displayed single dominant TCR-β PCR products consistent with the presence of clonal T-cell populations. Direct sequencing of the clonal TCR-β PCR-products disclosed an involvement of Vb 19.01 segments in 14 of the dominant amplificates (70%). Further TCR-Vβ segments involved in clonal TCR-β rearrangements of DCM hearts were Vβ 6-1.01 (n=1), Vβ 6-3.01 (n=2), Vβ 6-5.01 (n=1), Vβ 10-3.02 (n=1), and Vβ 19.03 (n=1). Conclusions The detectability of clonal TCR-β rearrangements indicates a pathogenic relevance of this finding in DCM. The predominance of Vβ 19.01 segments suggests that the immune response in DCM patients targets particular epitopes. However, the partly heterogenic TCR-β populations in various myocardial samples from the respective cases support the notion that T-cell immunity may target multiple epitopes in human DCM.
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Affiliation(s)
- Jan-Henrik Blohm
- Department of Cardiology and Pneumonology, Charité - Universitätsmedizin Berlin, Campus Benjamin Franklin, Berlin, Germany
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Noutsias M, Pankuweit S, Maisch B. Biomarkers in Inflammatory and Noninflammatory Cardiomyopathy. Herz 2010; 34:614-23. [DOI: 10.1007/s00059-009-3318-2] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Noutsias M, Rohde M, Block A, Klippert K, Lettau O, Blunert K, Hummel M, Kühl U, Lehmkuhl H, Hetzer R, Rauch U, Poller W, Pauschinger M, Schultheiss HP, Volk HD, Kotsch K. Preamplification techniques for real-time RT-PCR analyses of endomyocardial biopsies. BMC Mol Biol 2008; 9:3. [PMID: 18194512 PMCID: PMC2262094 DOI: 10.1186/1471-2199-9-3] [Citation(s) in RCA: 55] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2007] [Accepted: 01/14/2008] [Indexed: 11/29/2022] Open
Abstract
Background Due to the limited RNA amounts from endomyocardial biopsies (EMBs) and low expression levels of certain genes, gene expression analyses by conventional real-time RT-PCR are restrained in EMBs. We applied two preamplification techniques, the TaqMan® PreAmp Master Mix (T-PreAmp) and a multiplex preamplification following a sequence specific reverse transcription (SSRT-PreAmp). Results T-PreAmp encompassing 92 gene assays with 14 cycles resulted in a mean improvement of 7.24 ± 0.33 Ct values. The coefficients for inter- (1.89 ± 0.48%) and intra-assay variation (0.85 ± 0.45%) were low for all gene assays tested (<4%). The PreAmp uniformity values related to the reference gene CDKN1B for 91 of the investigated gene assays (except for CD56) were -0.38 ± 0.33, without significant differences between self-designed and ABI inventoried Taqman® gene assays. Only two of the tested Taqman® ABI inventoried gene assays (HPRT-ABI and CD56) did not maintain PreAmp uniformity levels between -1.5 and +1.5. In comparison, the SSRT-PreAmp tested on 8 self-designed gene assays yielded higher Ct improvement (9.76 ± 2.45), however was not as robust regarding the maintenance of PreAmp uniformity related to HPRT-CCM (-3.29 ± 2.40; p < 0.0001), and demonstrated comparable intra-assay CVs (1.47 ± 0.74), albeit higher inter-assay CVs (5.38 ± 2.06; p = 0.01). Comparing EMBs from each 10 patients with dilated cardiomyopathy (DCM) and inflammatory cardiomyopathy (DCMi), T-PreAmp real-time RT-PCR analyses revealed differential regulation regarding 27 (30%) of the investigated 90 genes related to both HPRT-CCM and CDKN1B. Ct values of HPRT and CDKN1B did not differ in equal RNA amounts from explanted DCM and donor hearts. Conclusion In comparison to the SSRT-PreAmp, T-PreAmp enables a relatively simple workflow, and results in a robust PreAmp of multiple target genes (at least 92 gene assays as tested here) by a mean Ct improvement around 7 cycles, and in a lower inter-assay variance in RNA derived from EMBs. Preliminary analyses comparing EMBs from DCM and DCMi patients, revealing differential regulation regarding 30% of the investigated genes, confirm that T-PreAmp is a suitable tool to perform gene expression analyses in EMBs, expanding gene expression investigations with the limited RNA/cDNA amounts derived from EMBs. CDKN1B, in addition to its function as a reference gene for the calculation of PreAmp uniformity, might serve as a suitable housekeeping gene for real-time RT-PCR analyses of myocardial tissues.
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Affiliation(s)
- Michel Noutsias
- Department of Cardiology and Pneumonology, Charité - Universitätsmedizin Berlin, Campus Benjamin Franklin, 12200 Berlin, Germany.
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Pauschinger M, Noutsias M, Lassner D, Schultheiss HP, Kuehl U. Inflammation, ECG changes and pericardial effusion: whom to biopsy in suspected myocarditis? Clin Res Cardiol 2006; 95:569-83. [PMID: 16897143 PMCID: PMC2780695 DOI: 10.1007/s00392-006-0427-2] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/02/2006] [Accepted: 06/27/2006] [Indexed: 02/01/2023]
Abstract
The role of endomyocardial biopsies in patients with clinically suspected acute myocarditis, myocarditis in the past, and dilated cardiomyopathy is discussed controversially. In fact, it is still under discussion whether information obtained from endomyocardial biopsies is relevant for further clinical decisions. Therefore this Critical Perspective will deal with the question, which patient should undergo endomyocardial biopsy investigations for an etiopathogenic differentiation of the disease and for the possible choice of immunomodulatory treatment strategies.
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Affiliation(s)
- M Pauschinger
- Medizinische Klinik II, Department of Cardiology and Pneumonology, Charité - Universitätsmedizin Berlin Campus Benjamin Franklin, 12200, Berlin, Germany.
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Schultheiss HP, Noutsias M, Kühl U, Lassner D, Gross U, Poller W, Pauschinger M. [Cardiomyopathies. I: classification of cardiomyopathies--dilated cardiomyopathy]. Internist (Berl) 2006; 46:1245-56; quiz 1257. [PMID: 16228156 DOI: 10.1007/s00108-005-1483-9] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Cardiomyopathies are common causes of heart failure and sudden cardiac death. According to the WHO classification, "specific" cardiomyopathies are differentiated from "idiopathic" cardiomyopathies. Thus, this classification is primarily based on pathophysiological characteristics. The diagnostic spectrum in cardiomyopathies comprises the entire spectrum of non-invasive and invasive cardiological examination techniques. The exact verification of certain cardiomyopathies necessitates additionally investigations. For example, immunohistological and molecular biological investigations of endomyocardial biopsies may confirm inflammatory cardiomyopathy, which is often induced by viruses. Several studies have shown that specific immunomodulatory treatment options can halt the progressive course of the disease. Several gene mutations have been identified in genetic/familial dilated cardiomyopathy. First-degree relatives should be screened for early stages. Primary prevention of sudden cardiac death shows increasing superiority of the implantable defibrillator compared with pharmacological approaches (i.e. amiodarone).
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Affiliation(s)
- H P Schultheiss
- Medizinische Klinik II, Kardiologie und Pneumologie, Charité Universitätsmedizin Berlin.
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Tschöpe C, Walther T, Escher F, Spillmann F, Du J, Altmann C, Schimke I, Bader M, Sanchez-Ferrer CF, Schultheiss HP, Noutsias M. Transgenic activation of the kallikrein-kinin system inhibits intramyocardial inflammation, endothelial dysfunction and oxidative stress in experimental diabetic cardiomyopathy. FASEB J 2005; 19:2057-9. [PMID: 16129698 DOI: 10.1096/fj.05-4095fje] [Citation(s) in RCA: 96] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
The mechanisms contributing to diabetic cardiomyopathy, as well as the protective pathways of the kallikrein-kinin-system (KKS), are incompletely understood. In a kallikrein-overexpressing rat model of streptozotocin (STZ)-induced diabetic cardiomyopathy, we investigated the involvement of inflammatory pathways, endothelial dysfunction, and oxidative stress. Six weeks after STZ injection, impairment of left ventricular (LV) function parameters measured by a Millar-tip catheter (peak LV systolic pressure; dP/dtmax; dP/dtmin) was accompanied by a significant increment of ICAM-1 and VCAM-1 (CAMs) expression, as well as of beta2-leukocyte-integrins+ (CD18+, CD11a+, CD11b+) and cytokine (TNF-alpha and IL-1beta)-expressing infiltrates in male Sprague-Dawley (SD-STZ) rats compared with normoglycemic littermates. Furthermore, SD-STZ rats demonstrated a significant impairment of endothelium-dependent relaxation evoked by acetylcholine and significantly increased plasma TBARS (plasma thiobarbituric acid reactive substances) levels as a measure of oxidative stress. These diabetic cardiomyopathy-associated alterations were significantly attenuated (P<0.05) in diabetic transgenic rats expressing the human kallikrein 1 (hKLK1) gene with STZ-induced diabetes. CAMs expression, beta2-leukocyte-integrins+, and cytokine-expressing infiltrates correlated significantly with all evaluated LV function parameters. The multiple protective effects of the KKS in experimental diabetic cardiomyopathy comprise the inhibition of intramyocardial inflammation (CAMs expression, beta2-leukocyte-integrins+ infiltration and cytokine expression), an improvement of endothelium-dependent relaxation and the attenuation of oxidative stress. These insights might have therapeutic implications also for human diabetic cardiomyopathy.
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Affiliation(s)
- Carsten Tschöpe
- Department of Cardiology and Pneumonology, Charité-University Medicine Berlin, Campus Benjamin Franklin, Berlin, Germany.
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Noutsias M, Pauschinger M, Poller WC, Schultheiss HP, Kühl U. Immunomodulatory treatment strategies in inflammatory cardiomyopathy: current status and future perspectives. Expert Rev Cardiovasc Ther 2004; 2:37-51. [PMID: 15038412 DOI: 10.1586/14779072.2.1.37] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Chronic autoimmunity and viral persistence constitute prognostic factors for adverse outcome in dilated cardiomyopathy patients. Inflammatory cardiomyopathy is a specific cardiomyopathy entity diagnosed in approximately 50% of dilated cardiopmyopathy patients by immunohistological quantification of immunocompetent infiltrates and cell adhesion molecule abundance. Patients with autoimmune inflammatory cardiomyopathy benefit from immunosuppressive treatment and immunoadsorption by improvement of left ventricular ejection fraction and heart failure symptoms, paralleled by a significant suppression of intramyocardial inflammation. However, dilated cardiomyopathy patients with viral persistence do not respond favorably to immunosuppression.
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Affiliation(s)
- Michel Noutsias
- Department of Cardiology and Pneumonology, Charité-University Medicine Berlin, Campus Benjamin Franklin, Berlin, Germany.
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