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Gilda JE, Gomes AV. Proteasome dysfunction in cardiomyopathies. J Physiol 2017; 595:4051-4071. [PMID: 28181243 DOI: 10.1113/jp273607] [Citation(s) in RCA: 43] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2016] [Accepted: 01/13/2017] [Indexed: 12/16/2022] Open
Abstract
The ubiquitin-proteasome system (UPS) plays a critical role in removing unwanted intracellular proteins and is involved in protein quality control, signalling and cell death. Because the heart is subject to continuous metabolic and mechanical stress, the proteasome plays a particularly important role in the heart, and proteasome dysfunction has been suggested as a causative factor in cardiac dysfunction. Proteasome impairment has been detected in cardiomyopathies, heart failure, myocardial ischaemia, and hypertrophy. Proteasome inhibition is also sufficient to cause cardiac dysfunction in healthy pigs, and patients using a proteasome inhibitor for cancer therapy have a higher incidence of heart failure. In this Topical Review we discuss the experimental data which suggest UPS dysfunction is a common feature of cardiomyopathies, with an emphasis on hypertrophic cardiomyopathy caused by sarcomeric mutations. We also propose potential mechanisms by which cardiomyopathy-causing mutations may lead to proteasome impairment, such as altered calcium handling and increased oxidative stress due to mitochondrial dysfunction.
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Affiliation(s)
- Jennifer E Gilda
- Department of Neurobiology, Physiology, and Behaviour, University of California, Davis, CA, 95616, USA
| | - Aldrin V Gomes
- Department of Neurobiology, Physiology, and Behaviour, University of California, Davis, CA, 95616, USA.,Department of Physiology and Membrane Biology, University of California, Davis, CA, 95616, USA
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Inhibition of chymotryptic-like standard proteasome activity exacerbates doxorubicin-induced cytotoxicity in primary cardiomyocytes. Toxicology 2016; 353-354:34-47. [DOI: 10.1016/j.tox.2016.04.010] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2016] [Revised: 04/19/2016] [Accepted: 04/29/2016] [Indexed: 01/16/2023]
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Sjakste T, Paramonova N, Rumba-Rozenfelde I, Trapina I, Sugoka O, Sjakste N. Juvenile idiopathic arthritis subtype- and sex-specific associations with genetic variants in the PSMA6/PSMC6/PSMA3 gene cluster. Pediatr Neonatol 2014; 55:393-403. [PMID: 24875235 DOI: 10.1016/j.pedneo.2014.01.007] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/17/2013] [Revised: 12/25/2013] [Accepted: 01/30/2014] [Indexed: 11/26/2022] Open
Abstract
BACKGROUND The ubiquitin proteasome system plays an exceptional biological role in the antigen processing and immune response and it could potentially be involved in pathogenesis of many immunity-related diseases, including juvenile idiopathic arthritis (JIA). METHODS The PSMB5 (rs11543947), PSMA6 (rs2277460, rs1048990), PSMC6 (rs2295826, rs2295827), and PSMA3 (rs2348071) proteasomal genes were genotyped on JIA subtype- and sex-specific association; plasma proteasome levels was measured in patients having risk and protective four-locus genotypes and eventual functional significance of allele substitutions was evaluated in silico. RESULTS Loci rs11543947 and rs1048990 were identified as disease neutral and other loci as disease susceptible (p < 0.05). The rs2277460, rs2295826, and rs2295827 loci had the strongest association with oligoarthritis [odds ratio (OR) = 2.024, 95% confidence interval (CI) 1.101-3.722; OR = 2.371, 95% CI 1.390-4.044; OR = 2.183, 95% CI 1.272-2.737, respectively), but the rs2348071 locus was associated with polyarthritis in females (OR = 3.438, 95% CI 1.626-7.265). A strong (p < 0.001) association was detected between the rs2277460/rs2295826/rs2295827/rs2348071 four-locus genotypes and the healthy phenotype when all loci were homozygous on common alleles (OR 0.439, 95% CI 0.283-0.681) and with the disease phenotype when the rs2348071 and the rs2295826 and/or rs2295827 loci were represented by risk genotypes simultaneously (OR 4.674, 95% CI 2.096-10.425). Rarely observed in controls, the double rs2277460/rs2348071 heterozygotes were rather frequent in affected males and more strongly associated with polyarthritis (p < 0.05). Haplotypes carrying the rare rs2295826/rs2295827 and rs2277460 alleles showed a strong (p < 0.001) association with oligo- and polyarthritis, respectively. The plasma proteasome level was found to be significantly higher in females having four-locus risk genotypes compared with protective genotypes (p < 0.001). Sequence affinity to transcription factors and similarity to splicing signals, microRNAs and/or hairpin precursors potentially depend on allele substitutions in disease susceptible loci. CONCLUSION We demonstrate for the first time evidence of a sex-specific association of PSMA6/PSMC6/PSMA3 genetic variants with subtypes of JIA and plasma proteasome concentrations. Theoretical models of the functional significance of allele substitutions are discussed.
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Affiliation(s)
- Tatjana Sjakste
- Institute of Biology, University of Latvia, Salaspils, Latvia.
| | | | | | - Ilva Trapina
- Latvian Institute of Organic Synthesis, Riga, Latvia
| | - Olga Sugoka
- Institute of Biology, University of Latvia, Salaspils, Latvia
| | - Nikolajs Sjakste
- Faculty of Medicine, University of Latvia, Riga, Latvia; Latvian Institute of Organic Synthesis, Riga, Latvia
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Cialdella P, Pedicino D, Gustapane M, Santangeli P, Narducci ML, Pelargonio G, Basile E, Giglio AF, Pazzano V, Vitulano N, Bellocci F. Inflammatory markers in heart failure. J Cardiovasc Med (Hagerstown) 2013; 14:342-50. [DOI: 10.2459/jcm.0b013e328349afb6] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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Powell SR, Herrmann J, Lerman A, Patterson C, Wang X. The ubiquitin-proteasome system and cardiovascular disease. PROGRESS IN MOLECULAR BIOLOGY AND TRANSLATIONAL SCIENCE 2012; 109:295-346. [PMID: 22727426 DOI: 10.1016/b978-0-12-397863-9.00009-2] [Citation(s) in RCA: 67] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Over the past decade, the role of the ubiquitin-proteasome system (UPS) has been the subject of numerous studies to elucidate its role in cardiovascular physiology and pathophysiology. There have been many advances in this field including the use of proteomics to achieve a better understanding of how the cardiac proteasome is regulated. Moreover, improved methods for the assessment of UPS function and the development of genetic models to study the role of the UPS have led to the realization that often the function of this system deviates from the norm in many cardiovascular pathologies. Hence, dysfunction has been described in atherosclerosis, familial cardiac proteinopathies, idiopathic dilated cardiomyopathies, and myocardial ischemia. This has led to numerous studies of the ubiquitin protein (E3) ligases and their roles in cardiac physiology and pathophysiology. This has also led to the controversial proposition of treating atherosclerosis, cardiac hypertrophy, and myocardial ischemia with proteasome inhibitors. Furthering our knowledge of this system may help in the development of new UPS-based therapeutic modalities for mitigation of cardiovascular disease.
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Affiliation(s)
- Saul R Powell
- Center for Heart and Lung Research, The Feinstein Institute for Medical Research, Manhasset, New York, USA
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Regulatory T cells ameliorate cardiac remodeling after myocardial infarction. Basic Res Cardiol 2011; 107:232. [DOI: 10.1007/s00395-011-0232-6] [Citation(s) in RCA: 173] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/27/2011] [Revised: 11/14/2011] [Accepted: 11/25/2011] [Indexed: 12/21/2022]
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Defective proteolytic systems in Mybpc3-targeted mice with cardiac hypertrophy. Basic Res Cardiol 2011; 107:235. [PMID: 22189562 DOI: 10.1007/s00395-011-0235-3] [Citation(s) in RCA: 78] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/12/2011] [Revised: 11/09/2011] [Accepted: 12/02/2011] [Indexed: 02/07/2023]
Abstract
Several lines of evidence suggest that alterations of the ubiquitin-proteasome system (UPS) and autophagy-lysosome pathway (ALP) may be involved in cardiac diseases. Little is known, however, in hypertrophic cardiomyopathy (HCM). This study studied these pathways in two mouse models of HCM that mainly differ by the presence or absence of truncated mutant proteins. Analyses were performed in homozygous Mybpc3-targeted knock-in (KI) mice, carrying a HCM mutation and exhibiting low levels of mutant cardiac myosin-binding protein C (cMyBP-C), and in Mybpc3-targeted knock-out (KO) mice expressing no cMyBP-C, thus serving as a model of pure cMyBP-C insufficiency. In the early postnatal development of cardiac hypertrophy, both models showed higher levels of ubiquitinated proteins and greater proteasomal activities. To specifically monitor the degradation capacity of the UPS with age, mice were crossed with transgenic mice that overexpress Ub(G76V)-GFP. Ub(G76V)-GFP protein levels were fourfold higher in 1-year-old KI, but not KO mice, suggesting a specific UPS impairment in mice expressing truncated cMyBP-C. Whereas protein levels of key ALP markers were higher, suggesting ALP activation in both mutant mice, their mRNA levels did not differ between the groups, underlying rather defective ALP-mediated degradation. Analysis of key proteins regulated in heart failure did not reveal specific alterations in KI and KO mice. Our data suggest (1) UPS activation in early postnatal development of cardiac hypertrophy, (2) specific UPS impairment in old KI mice carrying a HCM mutation, and (3) defective ALP as a common mechanism in genetically engineered mice with cardiac hypertrophy.
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Conditional transgenic expression of TIR-domain-containing adaptor-inducing interferon-β (TRIF) in the adult mouse heart is protective in acute viral myocarditis. Basic Res Cardiol 2011; 106:1159-71. [DOI: 10.1007/s00395-011-0226-4] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/10/2011] [Revised: 09/10/2011] [Accepted: 09/19/2011] [Indexed: 12/29/2022]
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Li YF, Wang X. The role of the proteasome in heart disease. BIOCHIMICA ET BIOPHYSICA ACTA 2011; 1809:141-9. [PMID: 20840877 PMCID: PMC3021001 DOI: 10.1016/j.bbagrm.2010.09.001] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/31/2010] [Revised: 09/01/2010] [Accepted: 09/02/2010] [Indexed: 01/23/2023]
Abstract
Intensive investigations into the pathophysiological significance of the proteasome in the heart did not start until the beginning of the past decade but exciting progress has been made and summarized here as two fronts. First, strong evidence continues to emerge to support a novel hypothesis that proteasome functional insufficiency represents a common pathological phenomenon in a large subset of heart disease, compromises protein quality control in heart muscle cells, and thereby acts as a major pathogenic factor promoting the progression of the subset of heart disease to congestive heart failure. This front is represented by the studies on the ubiquitin-proteasome system (UPS) in cardiac proteinopathy, which have taken advantage of a transgenic mouse model expressing a fluorescence reporter for UPS proteolytic function. Second, pharmacological inhibition of the proteasome has been explored experimentally as a potential therapeutic strategy to intervene on some forms of heart disease, such as pressure-overload cardiac hypertrophy, viral myocarditis, and myocardial ischemic injury. Not only between the two fronts but also within each one, a multitude of inconsistencies and controversies remain to be explained and clarified. At present, the controversy perhaps reflects the sophistication of cardiac proteasomes in terms of the composition, assembly, and regulation, as well as the intricacy and diversity of heart disease in terms of its etiology and pathogenesis. A definitive role of altered proteasome function in the development of various forms of heart disease remains to be established. This article is part of a Special Issue entitled The 26S Proteasome: When degradation is just not enough!
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Affiliation(s)
- Yi-Fan Li
- Division of Basic, Biomedical Sciences, Sanford School of Medicine of the University of South Dakota, Vermillion, SD 57069, USA
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Schoenauer R, Emmert MY, Felley A, Ehler E, Brokopp C, Weber B, Nemir M, Faggian GG, Pedrazzini T, Falk V, Hoerstrup SP, Agarkova I. EH-myomesin splice isoform is a novel marker for dilated cardiomyopathy. Basic Res Cardiol 2010; 106:233-47. [PMID: 21069531 PMCID: PMC3032906 DOI: 10.1007/s00395-010-0131-2] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/07/2010] [Revised: 09/29/2010] [Accepted: 10/25/2010] [Indexed: 11/05/2022]
Abstract
The M-band is the prominent cytoskeletal structure that cross-links the myosin and titin filaments in the middle of the sarcomere. To investigate M-band alterations in heart disease, we analyzed the expression of its main components, proteins of the myomesin family, in mouse and human cardiomyopathy. Cardiac function was assessed by echocardiography and compared to the expression pattern of myomesins evaluated with RT-PCR, Western blot, and immunofluorescent analysis. Disease progression in transgenic mouse models for dilated cardiomyopathy (DCM) was accompanied by specific M-band alterations. The dominant splice isoform in the embryonic heart, EH-myomesin, was strongly up-regulated in the failing heart and correlated with a decrease in cardiac function (R = −0.86). In addition, we have analyzed the expressions of myomesins in human myocardial biopsies (N = 40) obtained from DCM patients, DCM patients supported by a left ventricular assist device (LVAD), hypertrophic cardiomyopathy (HCM) patients and controls. Quantitative RT-PCR revealed that the EH-myomesin isoform was up-regulated 41-fold (P < 0.001) in the DCM patients compared to control patients. In DCM hearts supported by a LVAD and HCM hearts, the EH-myomesin expression was comparable to controls. Immunofluorescent analyses indicate that EH-myomesin was enhanced in a cell-specific manner, leading to a higher heterogeneity of the myocytes’ cytoskeleton through the myocardial wall. We suggest that the up-regulation of EH-myomesin denotes an adaptive remodeling of the sarcomere cytoskeleton in the dilated heart and might serve as a marker for DCM in mouse and human myocardium.
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Affiliation(s)
- Roman Schoenauer
- Swiss Center for Regenerative Medicine, University of Zurich, Zurich, Switzerland
- Department of Surgical Research, University Hospital Zurich, Rämistrasse 100, 8091 Zurich, Switzerland
| | - Maximilian Y. Emmert
- Swiss Center for Regenerative Medicine, University of Zurich, Zurich, Switzerland
- Department of Surgical Research, University Hospital Zurich, Rämistrasse 100, 8091 Zurich, Switzerland
- Clinic for Cardiovascular Surgery, University Hospital Zurich, Zurich, Switzerland
| | - Allison Felley
- Department of Medicine, University of Lausanne Medical School, Lausanne, Switzerland
| | - Elisabeth Ehler
- The Randall Division of Cell and Molecular Biophysics and the Cardiovascular Division, King’s College London, London, UK
| | - Chad Brokopp
- Swiss Center for Regenerative Medicine, University of Zurich, Zurich, Switzerland
- Department of Surgical Research, University Hospital Zurich, Rämistrasse 100, 8091 Zurich, Switzerland
| | - Benedikt Weber
- Swiss Center for Regenerative Medicine, University of Zurich, Zurich, Switzerland
- Department of Surgical Research, University Hospital Zurich, Rämistrasse 100, 8091 Zurich, Switzerland
- Clinic for Cardiovascular Surgery, University Hospital Zurich, Zurich, Switzerland
| | - Mohamed Nemir
- Department of Medicine, University of Lausanne Medical School, Lausanne, Switzerland
| | - Giuseppe G. Faggian
- Division of Cardiac Surgery and Cardiology, University of Verona, Verona, Italy
| | - Thierry Pedrazzini
- Department of Medicine, University of Lausanne Medical School, Lausanne, Switzerland
| | - Volkmar Falk
- Clinic for Cardiovascular Surgery, University Hospital Zurich, Zurich, Switzerland
| | - Simon P. Hoerstrup
- Swiss Center for Regenerative Medicine, University of Zurich, Zurich, Switzerland
- Department of Surgical Research, University Hospital Zurich, Rämistrasse 100, 8091 Zurich, Switzerland
- Clinic for Cardiovascular Surgery, University Hospital Zurich, Zurich, Switzerland
| | - Irina Agarkova
- Swiss Center for Regenerative Medicine, University of Zurich, Zurich, Switzerland
- Department of Surgical Research, University Hospital Zurich, Rämistrasse 100, 8091 Zurich, Switzerland
- Clinic for Cardiovascular Surgery, University Hospital Zurich, Zurich, Switzerland
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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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Voigt A, Trimpert C, Bartel K, Egerer K, Kuckelkorn U, Feist E, Gericke C, Klingel K, Kandolf R, Felix SB, Baumann G, Kloetzel PM, Stangl K, Staudt A. Lack of evidence for a pathogenic role of proteasome-directed autoimmunity in dilated cardiomyopathy. Basic Res Cardiol 2010; 105:557-67. [DOI: 10.1007/s00395-010-0096-1] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/14/2009] [Revised: 03/12/2010] [Accepted: 03/13/2010] [Indexed: 01/10/2023]
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