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Gomes G, Seixas MR, Azevedo S, Audi K, Jurberg AD, Mermelstein C, Costa ML. What does desmin do: A bibliometric assessment of the functions of the muscle intermediate filament. Exp Biol Med (Maywood) 2022; 247:538-550. [PMID: 35130760 DOI: 10.1177/15353702221075035] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Intermediate filaments were first described in muscle in 1968, and desmin was biochemically identified about 10 years afterwards. Its importance grew after the identification of desminopathies and desmin mutations that cause mostly cardiopathies. Since its characterization until recently, different functions have been attributed to desmin. Here, we use bibliometric tools to evaluate the articles published about desmin and to assess its several putative functions. We identified the most productive authors and the relationships between research groups. We studied the more frequent words among 9734 articles (September 2021) containing "desmin" on the title and abstract, to identify the major research focus. We generated an interactive spreadsheet with the 934 papers that contain "desmin" only on the title that can be used to search and quantify terms in the abstract. We further selected the articles that contained the terms "function" or "role" from the spreadsheet, which we then classified according to type of function, organelle, or tissue involved. Based on the bibliographic analysis, we assess comparatively the putative functions, and we propose an alternative explanation for the desmin function.
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Affiliation(s)
- Geyse Gomes
- Instituto de Ciências Biomédicas, Universidade Federal do Rio de Janeiro, Rio de Janeiro 21944-970, Brazil
| | - Marianna R Seixas
- Instituto de Ciências Biomédicas, Universidade Federal do Rio de Janeiro, Rio de Janeiro 21944-970, Brazil
| | - Sarah Azevedo
- Instituto de Ciências Biomédicas, Universidade Federal do Rio de Janeiro, Rio de Janeiro 21944-970, Brazil
| | - Karina Audi
- Instituto de Ciências Biomédicas, Universidade Federal do Rio de Janeiro, Rio de Janeiro 21944-970, Brazil
| | - Arnon D Jurberg
- Instituto de Ciências Biomédicas, Universidade Federal do Rio de Janeiro, Rio de Janeiro 21944-970, Brazil.,Faculdade de Medicina, Universidade Estácio de Sá, Rio de Janeiro 20071-001, Brazil
| | - Claudia Mermelstein
- Instituto de Ciências Biomédicas, Universidade Federal do Rio de Janeiro, Rio de Janeiro 21944-970, Brazil
| | - Manoel Luis Costa
- Instituto de Ciências Biomédicas, Universidade Federal do Rio de Janeiro, Rio de Janeiro 21944-970, Brazil
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2
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Zhou H, He L, Xu G, Chen L. Mitophagy in cardiovascular disease. Clin Chim Acta 2020; 507:210-218. [DOI: 10.1016/j.cca.2020.04.033] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2020] [Revised: 04/27/2020] [Accepted: 04/28/2020] [Indexed: 02/08/2023]
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Identification of Upstream Transcriptional Regulators of Ischemic Cardiomyopathy Using Cardiac RNA-Seq Meta-Analysis. Int J Mol Sci 2020; 21:ijms21103472. [PMID: 32423033 PMCID: PMC7278960 DOI: 10.3390/ijms21103472] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2020] [Revised: 04/30/2020] [Accepted: 05/08/2020] [Indexed: 12/30/2022] Open
Abstract
Ischemic cardiomyopathy (ICM), characterized by pre-existing myocardial infarction or severe coronary artery disease, is the major cause of heart failure (HF). Identification of novel transcriptional regulators in ischemic HF can provide important biomarkers for developing new diagnostic and therapeutic strategies. In this study, we used four RNA-seq datasets from four different studies, including 41 ICM and 42 non-failing control (NF) samples of human left ventricle tissues, to perform the first RNA-seq meta-analysis in the field of clinical ICM, in order to identify important transcriptional regulators and their targeted genes involved in ICM. Our meta-analysis identified 911 differentially expressed genes (DEGs) with 582 downregulated and 329 upregulated. Interestingly, 54 new DEGs were detected only by meta-analysis but not in individual datasets. Upstream regulator analysis through Ingenuity Pathway Analysis (IPA) identified three key transcriptional regulators. TBX5 was identified as the only inhibited regulator (z-score = -2.89). F2R and SFRP4 were identified as the activated regulators (z-scores = 2.56 and 2.00, respectively). Multiple downstream genes regulated by TBX5, F2R, and SFRP4 were involved in ICM-related diseases such as HF and arrhythmia. Overall, our study is the first to perform an RNA-seq meta-analysis for clinical ICM and provides robust candidate genes, including three key transcriptional regulators, for future diagnostic and therapeutic applications in ischemic heart failure.
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Cardiomyocyte-specific disruption of Cathepsin K protects against doxorubicin-induced cardiotoxicity. Cell Death Dis 2018; 9:692. [PMID: 29880809 PMCID: PMC5992138 DOI: 10.1038/s41419-018-0727-2] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2018] [Revised: 05/19/2018] [Accepted: 05/21/2018] [Indexed: 12/12/2022]
Abstract
The lysosomal cysteine protease Cathepsin K is elevated in humans and animal models of heart failure. Our recent studies show that whole-body deletion of Cathepsin K protects mice against cardiac dysfunction. Whether this is attributable to a direct effect on cardiomyocytes or is a consequence of the global metabolic alterations associated with Cathepsin K deletion is unknown. To determine the role of Cathepsin K in cardiomyocytes, we developed a cardiomyocyte-specific Cathepsin K-deficient mouse model and tested the hypothesis that ablation of Cathepsin K in cardiomyocytes would ameliorate the cardiotoxic side-effects of the anticancer drug doxorubicin. We used an α-myosin heavy chain promoter to drive expression of Cre, which resulted in over 80% reduction in protein and mRNA levels of cardiac Cathepsin K at baseline. Four-month-old control (Myh-Cre-; Ctskfl/fl) and Cathepsin K knockout (Myh-Cre+; Ctskfl/fl) mice received intraperitoneal injections of doxorubicin or vehicle, 1 week following which, body and tissue weight, echocardiographic properties, cardiomyocyte contractile function and Ca2+-handling were evaluated. Control mice treated with doxorubicin exhibited a marked increase in cardiac Cathepsin K, which was associated with an impairment in cardiac structure and function, evidenced as an increase in end-systolic and end-diastolic diameters, decreased fractional shortening and wall thickness, disruption in cardiac sarcomere and microfilaments and impaired intracellular Ca2+ homeostasis. In contrast, the aforementioned cardiotoxic effects of doxorubicin were attenuated or reversed in mice lacking cardiac Cathepsin K. Mechanistically, Cathepsin K-deficiency reconciled the disturbance in cardiac energy homeostasis and attenuated NF-κB signaling and apoptosis to ameliorate doxorubicin-induced cardiotoxicity. Cathepsin K may represent a viable drug target to treat cardiac disease.
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Guichard JL, Rogowski M, Agnetti G, Fu L, Powell P, Wei CC, Collawn J, Dell'Italia LJ. Desmin loss and mitochondrial damage precede left ventricular systolic failure in volume overload heart failure. Am J Physiol Heart Circ Physiol 2017; 313:H32-H45. [PMID: 28455287 PMCID: PMC5538858 DOI: 10.1152/ajpheart.00027.2017] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/17/2017] [Revised: 03/27/2017] [Accepted: 04/10/2017] [Indexed: 01/10/2023]
Abstract
Heart failure due to chronic volume overload (VO) in rats and humans is characterized by disorganization of the cardiomyocyte desmin/mitochondrial network. Here, we tested the hypothesis that desmin breakdown is an early and continuous process throughout VO. Male Sprague-Dawley rats had aortocaval fistula (ACF) or sham surgery and were examined 24 h and 4 and 12 wk later. Desmin/mitochondrial ultrastructure was examined by transmission electron microscopy (TEM) and immunohistochemistry (IHC). Protein and kinome analysis were performed in isolated cardiomyocytes, and desmin cleavage was assessed by mass spectrometry in left ventricular (LV) tissue. Echocardiography demonstrated a 40% decrease in the LV mass-to-volume ratio with spherical remodeling at 4 wk with ACF and LV systolic dysfunction at 12 wk. Starting at 24 h and continuing to 4 and 12 wk, with ACF there is TEM evidence of extensive mitochondrial clustering, IHC evidence of disorganization associated with desmin breakdown, and desmin protein cleavage verified by Western blot analysis and mass spectrometry. IHC results revealed that ACF cardiomyocytes at 4 and 12 wk had perinuclear translocation of αB-crystallin from the Z disk with increased α, β-unsaturated aldehyde 4-hydroxynonelal. Use of protein markers with verification by TUNEL staining and kinome analysis revealed an absence of cardiomyocyte apoptosis at 4 and 12 wk of ACF. Significant increases in protein indicators of mitophagy were countered by a sixfold increase in p62/sequestosome-1, which is indicative of an inability to complete autophagy. An early and continuous disruption of the desmin/mitochondrial architecture, accompanied by oxidative stress and inhibition of apoptosis and mitophagy, suggests its causal role in LV dilatation and systolic dysfunction in VO.NEW & NOTEWORTHY This study provides new evidence of early onset (24 h) and continuous (4-12 wk) desmin misarrangement and disruption of the normal sarcomeric and mitochondrial architecture throughout the progression of volume overload heart failure, suggesting a causal link between desmin cleavage and mitochondrial disorganization and damage.
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Affiliation(s)
- Jason L Guichard
- Department of Medicine, Division of Cardiovascular Disease, University of Alabama at Birmingham, Birmingham, Alabama.,Center for Heart Failure Research, University of Alabama at Birmingham, Birmingham, Alabama
| | - Michael Rogowski
- Department of Medicine, Division of Cardiovascular Disease, University of Alabama at Birmingham, Birmingham, Alabama.,Center for Exercise Medicine, University of Alabama at Birmingham, Birmingham, Alabama
| | - Giulio Agnetti
- Division of Cardiology, Department of Medicine, Johns Hopkins School of Medicine, Baltimore, Maryland.,Department of Biomedical and Neuromotor Sciences, University of Bologna, Bologna, Italy; and
| | - Lianwu Fu
- Department of Cell, Developmental, and Integrative Biology, University of Alabama at Birmingham, Birmingham, Alabama
| | - Pamela Powell
- Department of Veterans Affairs Medical Center, Birmingham, Alabama
| | - Chih-Chang Wei
- Center for Heart Failure Research, University of Alabama at Birmingham, Birmingham, Alabama.,Department of Veterans Affairs Medical Center, Birmingham, Alabama
| | - James Collawn
- Department of Cell, Developmental, and Integrative Biology, University of Alabama at Birmingham, Birmingham, Alabama
| | - Louis J Dell'Italia
- Department of Medicine, Division of Cardiovascular Disease, University of Alabama at Birmingham, Birmingham, Alabama; .,Center for Heart Failure Research, University of Alabama at Birmingham, Birmingham, Alabama.,Department of Veterans Affairs Medical Center, Birmingham, Alabama
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Ahmed MI, Guichard JL, Soorappan RN, Ahmad S, Mariappan N, Litovsky S, Gupta H, Lloyd SG, Denney TS, Powell PC, Aban I, Collawn J, Davies JE, McGiffin DC, Dell'Italia LJ. Disruption of desmin-mitochondrial architecture in patients with regurgitant mitral valves and preserved ventricular function. J Thorac Cardiovasc Surg 2016; 152:1059-1070.e2. [PMID: 27464577 DOI: 10.1016/j.jtcvs.2016.06.017] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/15/2016] [Revised: 06/02/2016] [Accepted: 06/10/2016] [Indexed: 01/23/2023]
Abstract
OBJECTIVE Recent studies have demonstrated improved outcomes in patients receiving early surgery for degenerative mitral regurgitation (MR) rather than adhering to conventional guidelines for surgical intervention. However, studies providing a mechanistic basis for these findings are limited. METHODS Left ventricular (LV) myocardium from 22 patients undergoing mitral valve repair for American Heart Association class I indications was evaluated for desmin, the voltage-dependent anion channel, α-B-crystallin, and α, β-unsaturated aldehyde 4-hydroxynonenal by fluorescence microscopy. The same was evaluated in 6 normal control LV autopsy specimens. Cardiomyocyte ultrastructure was examined by transmission electron microscopy. Magnetic resonance imaging with tissue tagging was performed in 55 normal subjects and 22 MR patients before and 6 months after mitral valve repair. RESULTS LV end-diastolic volume was 1.5-fold (P < .0001) higher and LV mass-to-volume ratio was lower in MR (P = .004) hearts versus normal hearts and showed improvement 6 months after mitral valve surgery. However, LV ejection fraction decreased from 65% ± 7% to 52% ± 9% (P < .0001) and LV circumferential (P < .0001) and longitudinal strain decreased significantly below normal values (P = .002) after surgery. Hearts with MR had a 53% decrease in desmin (P < .0001) and a 2.6-fold increase in desmin aggregates (P < .0001) versus normal, along with substantial, intense perinuclear staining of α, β-unsaturated aldehyde 4-hydroxynonenal in areas of mitochondrial breakdown and clustering. Transmission electron microscopy demonstrated numerous electron-dense deposits, myofibrillar loss, Z-disc abnormalities, and extensive granulofilamentous debris identified as desmin-positive by immunogold transmission electron microscopy. CONCLUSIONS Despite well-preserved preoperative LV ejection fraction, severe oxidative stress and disruption of cardiomyocyte desmin-mitochondrial sarcomeric architecture may explain postoperative LV functional decline and further supports the move toward earlier surgical intervention.
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Affiliation(s)
- Mustafa I Ahmed
- Department of Medicine, Division of Cardiovascular Disease, UAB
| | | | | | - Shama Ahmad
- Department of Anesthesiology& Perioperative Medicine, UAB
| | | | | | - Himanshu Gupta
- Department of Veterans Affairs Medical Center, Birmingham (UAB), Alabama, USA.,Department of Medicine, Division of Cardiovascular Disease, UAB
| | - Steven G Lloyd
- Department of Veterans Affairs Medical Center, Birmingham (UAB), Alabama, USA.,Department of Medicine, Division of Cardiovascular Disease, UAB
| | - Thomas S Denney
- Auburn University School of Engineering, Auburn, Alabama, USA
| | - Pamela Cox Powell
- Department of Veterans Affairs Medical Center, Birmingham (UAB), Alabama, USA
| | | | - James Collawn
- Department of Cell, Developmental, and Integrative Biology, UAB
| | - James E Davies
- Department of Veterans Affairs Medical Center, Birmingham (UAB), Alabama, USA.,Department of Surgery, Division of Thoracic and Cardiovascular Surgery, UAB
| | | | - Louis J Dell'Italia
- Department of Veterans Affairs Medical Center, Birmingham (UAB), Alabama, USA.,Department of Medicine, Division of Cardiovascular Disease, UAB
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Su YR, Chiusa M, Brittain E, Hemnes AR, Absi TS, Lim CC, Di Salvo TG. Right ventricular protein expression profile in end-stage heart failure. Pulm Circ 2015; 5:481-97. [PMID: 26401249 DOI: 10.1086/682219] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/13/2014] [Accepted: 12/30/2014] [Indexed: 11/03/2022] Open
Abstract
Little is known about the right ventricular (RV) proteome in human heart failure (HF), including possible differences compared to the left ventricular (LV) proteome. We used 2-dimensional differential in-gel electrophoresis (pH: 4-7, 10-150 kDa), followed by liquid chromatography tandem mass spectrometry, to compare the RV and LV proteomes in 12 explanted human hearts. We used Western blotting and multiple-reaction monitoring for protein verification and RNA sequencing for messenger RNA and protein expression correlation. In all 12 hearts, the right ventricles (RVs) demonstrated differential expression of 11 proteins relative to the left ventricles (LVs), including lesser expression of CRYM, TPM1, CLU, TXNL1, and COQ9 and greater expression of TNNI3, SAAI, ERP29, ACTN2, HSPB2, and NDUFS3. Principal-components analysis did not suggest RV-versus-LV proteome partitioning. In the nonischemic RVs (n = 6), 7 proteins were differentially expressed relative to the ischemic RVs (n = 6), including increased expression of CRYM, B7Z964, desmin, ANXA5, and MIME and decreased expression of SERPINA1 and ANT3. Principal-components analysis demonstrated partitioning of the nonischemic and ischemic RV proteomes, and gene ontology analysis identified differences in hemostasis and atherosclerosis-associated networks. There were no proteomic differences between RVs with echocardiographic dysfunction (n = 8) and those with normal function (n = 4). Messenger RNA and protein expression did not correlate consistently, suggesting a major role for RV posttranscriptional protein expression regulation. Differences in contractile, cytoskeletal, metabolic, signaling, and survival pathways exist between the RV and the LV in HF and may be related to the underlying HF etiology and differential posttranscriptional regulation.
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Affiliation(s)
- Yan Ru Su
- Division of Cardiovascular Medicine, Vanderbilt University School of Medicine, Nashville, Tennessee, USA
| | - Manuel Chiusa
- Division of Cardiovascular Medicine, Vanderbilt University School of Medicine, Nashville, Tennessee, USA
| | - Evan Brittain
- Division of Cardiovascular Medicine, Vanderbilt University School of Medicine, Nashville, Tennessee, USA
| | - Anna R Hemnes
- Division of Pulmonary Medicine and Critical Care, Vanderbilt University School of Medicine, Nashville, Tennessee, USA
| | - Tarek S Absi
- Department of Surgical Science, Division of Cardiac Surgery, Vanderbilt University School of Medicine, Nashville, Tennessee, USA
| | - Chee Chew Lim
- Division of Cardiovascular Medicine, Vanderbilt University School of Medicine, Nashville, Tennessee, USA
| | - Thomas G Di Salvo
- Division of Cardiovascular Medicine, Vanderbilt University School of Medicine, Nashville, Tennessee, USA
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Yajima D, Shimizu K, Oka K, Asari M, Maseda C, Okuda K, Shiono H, Ohtani S, Ogawa K. A Case of Sudden Infant Death Due to Incomplete Kawasaki Disease. J Forensic Sci 2015; 61 Suppl 1:S259-64. [PMID: 26347043 DOI: 10.1111/1556-4029.12929] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2014] [Revised: 02/02/2015] [Accepted: 02/09/2015] [Indexed: 12/23/2022]
Abstract
Although Kawasaki disease (KD) is a self-limiting disease, it may cause sudden cardiac death. Diagnosis of KD is principally based on clinical signs; however, some infant cases do not meet the criteria. Such cases are identified as incomplete KD. The sudden death risk in incomplete KD cases is similar to conventional KD. In our 5-month-old case, he had been admitted to a hospital for a fever and suppuration at the site of Bacille de Calmette et Guerin (BCG) vaccination. However, after discharge from the hospital, his C-reactive protein (CRP) levels declined, he got indisposed and died suddenly. A medico-legal autopsy revealed myocarditis, coronaritis, platelet-aggregated emboli in coronary arteries, and myocardial degeneration, suggesting that the fatal myocardial infarction was due to thrombus emboli in the coronary arteries. Forensic pathologists therefore should pay attention to the cardiac pathology originated from incomplete KD as a potential cause in cases of sudden infant death.
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Affiliation(s)
- Daisuke Yajima
- Department of Legal Medicine, Asahikawa Medical University, 2-1-1-1 Midorigaoka-Higashi, Asahikawa, 078-8510, Japan
| | - Keiko Shimizu
- Department of Legal Medicine, Asahikawa Medical University, 2-1-1-1 Midorigaoka-Higashi, Asahikawa, 078-8510, Japan
| | - Kumiko Oka
- Department of Legal Medicine, Asahikawa Medical University, 2-1-1-1 Midorigaoka-Higashi, Asahikawa, 078-8510, Japan.,Departments of Oral and Maxillofacial Surgery, Asahikawa Medical University, 2-1-1-1 Midorigaoka-Higashi, Asahikawa, 078-8510, Japan
| | - Masaru Asari
- Department of Legal Medicine, Asahikawa Medical University, 2-1-1-1 Midorigaoka-Higashi, Asahikawa, 078-8510, Japan
| | - Chikatoshi Maseda
- Department of Legal Medicine, Asahikawa Medical University, 2-1-1-1 Midorigaoka-Higashi, Asahikawa, 078-8510, Japan
| | - Katsuhiro Okuda
- Department of Legal Medicine, Asahikawa Medical University, 2-1-1-1 Midorigaoka-Higashi, Asahikawa, 078-8510, Japan
| | - Hiroshi Shiono
- Department of Legal Medicine, Asahikawa Medical University, 2-1-1-1 Midorigaoka-Higashi, Asahikawa, 078-8510, Japan
| | - Seiji Ohtani
- Department of Legal Medicine, Asahikawa Medical University, 2-1-1-1 Midorigaoka-Higashi, Asahikawa, 078-8510, Japan
| | - Katsuhiro Ogawa
- Department of Pathology, Asahikawa Medical University, 2-1-1-1 Midorigaoka-Higashi, Asahikawa, 078-8510, Japan
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Pawlak A, Gil RJ, Nasierowska-Guttmejer AM, Kasprzak JD. Changes in desmin expression in patients with cardiac diastolic dysfunction and preserved or reduced ejection fraction. Adv Med Sci 2015; 60:148-55. [PMID: 25732530 DOI: 10.1016/j.advms.2015.01.009] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2014] [Revised: 01/20/2015] [Accepted: 01/29/2015] [Indexed: 11/19/2022]
Abstract
PURPOSE Desmin regulates function of mitochondria, T-tubular system and cytosolic Ca(2+) transients. We investigated whether desmin remodeling correlates with diastolic dysfunction and whether progressive desmin abnormalities are accompanied by increasing diastolic dysfunction stages. PATIENTS AND METHODS Eighty five patients with idiopathic dilated cardiomyopathy and suspected myocarditis without confirmed cardiac tissue inflammation in histopathology assays were included and divided into groups: with preserved EF and reduced EF. After echocardiographic analysis of diastolic dysfunction we identified 2 preserved EF subgroups (normal diastolic function (NDF) and impaired relaxation (IR)) and 3 reduced EF subgroups (NDF, IR, and pseudonormalization). Patients with preserved EF and NDF formed the control group. Tissue desmin staining revealed 4 types of desmin expression: I - normal, with regular pattern of cross-section, IIA - increased with regular pattern, IIB - increased, with irregular pattern and presence of aggregates, III - decreased/lack desmin. RESULTS Desmin I was observed only in patients with NDF n=8 (100%) in preserved EF and reduced EF, desmin IIA in NDF n=8 (33%) in preserved EF and n=5 (33%) in reduced EF and IR n=16 (66%) in preserved EF and n=10 (66%) in reduced EF. Desmin IIB and III were observed in patients with reduced EF and diastolic dysfunction: IR and pseudonormalization n=9 (39%) and n=2 (29%); n=14 (61%) and n=5 (71%), respectively. Desmin was found to be an independent predictor of diastolic function parameters β=-0.63, R(2)=0.52 for E'; β=0.54, R(2)=0.42 for E/E'. CONCLUSIONS Increasing desmin abnormalities were correlated with diastolic dysfunction progression. Desmin expression represents a novel factor contributing or paralleling the development of diastolic dysfunction.
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Affiliation(s)
- Agnieszka Pawlak
- Department of Invasive Cardiology, Central Clinical Hospital of the Ministry of Internal Affairs, Warsaw, Poland.
| | - Robert Julian Gil
- Department of Invasive Cardiology, Central Clinical Hospital of the Ministry of Internal Affairs, Warsaw, Poland; Mossakowski Medical Research Centre, Academy of Science, Warsaw, Poland
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Yancey DM, Guichard JL, Ahmed MI, Zhou L, Murphy MP, Johnson MS, Benavides GA, Collawn J, Darley-Usmar V, Dell'Italia LJ. Cardiomyocyte mitochondrial oxidative stress and cytoskeletal breakdown in the heart with a primary volume overload. Am J Physiol Heart Circ Physiol 2015; 308:H651-63. [PMID: 25599572 DOI: 10.1152/ajpheart.00638.2014] [Citation(s) in RCA: 57] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
Left ventricular (LV) volume overload (VO) results in cardiomyocyte oxidative stress and mitochondrial dysfunction. Because mitochondria are both a source and target of ROS, we hypothesized that the mitochondrially targeted antioxidant mitoubiquinone (MitoQ) will improve cardiomyocyte damage and LV dysfunction in VO. Isolated cardiomyocytes from Sprague-Dawley rats were exposed to stretch in vitro and VO of aortocaval fistula (ACF) in vivo. ACF rats were treated with and without MitoQ. Isolated cardiomyocytes were analyzed after 3 h of cyclical stretch or 8 wk of ACF with MitoSox red or 5-(and-6)-chloromethyl-2',7'-dichlorodihydrofluorescein diacetate to measure ROS and with tetramethylrhodamine to measure mitochondrial membrane potential. Transmission electron microscopy and immunohistochemistry were used for cardiomyocyte structural assessment. In vitro cyclical stretch and 8-wk ACF resulted in increased cardiomyocyte mitochondrial ROS production and decreased mitochondrial membrane potential, which were significantly improved by MitoQ. ACF had extensive loss of desmin and β₂-tubulin that was paralleled by mitochondrial disorganization, loss of cristae, swelling, and clustering identified by mitochondria complex IV staining and transmission electron microscopy. MitoQ improved mitochondrial structural damage and attenuated desmin loss/degradation evidenced by immunohistochemistry and protein expression. However, LV dilatation and fractional shortening were unaffected by MitoQ treatment in 8-wk ACF. In conclusion, although MitoQ did not affect LV dilatation or function in ACF, these experiments suggest a connection of cardiomyocyte mitochondria-derived ROS production with cytoskeletal disruption and mitochondrial damage in the VO of ACF.
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Affiliation(s)
- Danielle M Yancey
- UAB Comprehensive Cardiovascular Center, University of Alabama at Birmingham, Birmingham, Alabama; Department of Medicine, Division of Cardiovascular Disease, University of Alabama at Birmingham, Birmingham, Alabama
| | - Jason L Guichard
- UAB Comprehensive Cardiovascular Center, University of Alabama at Birmingham, Birmingham, Alabama; Department of Medicine, Division of Cardiovascular Disease, University of Alabama at Birmingham, Birmingham, Alabama
| | - Mustafa I Ahmed
- UAB Comprehensive Cardiovascular Center, University of Alabama at Birmingham, Birmingham, Alabama; Department of Medicine, Division of Cardiovascular Disease, University of Alabama at Birmingham, Birmingham, Alabama
| | - Lufang Zhou
- UAB Comprehensive Cardiovascular Center, University of Alabama at Birmingham, Birmingham, Alabama; Department of Medicine, Division of Cardiovascular Disease, University of Alabama at Birmingham, Birmingham, Alabama
| | | | - Michelle S Johnson
- Department of Pathology, University of Alabama at Birmingham, Birmingham, Alabama; UAB Center for Free Radical Biology, University of Alabama at Birmingham, Birmingham, Alabama
| | - Gloria A Benavides
- Department of Pathology, University of Alabama at Birmingham, Birmingham, Alabama; UAB Center for Free Radical Biology, University of Alabama at Birmingham, Birmingham, Alabama
| | - James Collawn
- Department of Cell, Developmental, and Integrative Biology, University of Alabama at Birmingham, Birmingham, Alabama
| | - Victor Darley-Usmar
- Department of Pathology, University of Alabama at Birmingham, Birmingham, Alabama; UAB Center for Free Radical Biology, University of Alabama at Birmingham, Birmingham, Alabama
| | - Louis J Dell'Italia
- Department of Veterans Affairs Medical Center, Birmingham, Alabama; UAB Comprehensive Cardiovascular Center, University of Alabama at Birmingham, Birmingham, Alabama; Department of Medicine, Division of Cardiovascular Disease, University of Alabama at Birmingham, Birmingham, Alabama;
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11
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Comparison of the ventricle muscle proteome between patients with rheumatic heart disease and controls with mitral valve prolapse: HSP 60 may be a specific protein in RHD. BIOMED RESEARCH INTERNATIONAL 2014; 2014:151726. [PMID: 24738046 PMCID: PMC3971496 DOI: 10.1155/2014/151726] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/02/2013] [Revised: 01/31/2014] [Accepted: 02/03/2014] [Indexed: 11/17/2022]
Abstract
Objective. Rheumatic heart disease (RHD) is a serious autoimmune heart disease. The present study was aimed at identifying the differentially expressed proteins between patients with RHD and controls with mitral valve prolapse. Methods. Nine patients with RHD and nine controls with mitral valve prolapsed were enrolled for this study. Two-dimensional difference in-gel electrophoresis (2D-DIGE) and matrix-assisted laser desorption ionization time-of-flight mass spectrometry (MALDI-TOF-MS) were performed. Results. A total of 39 protein spots with differential expressions were identified between the two groups (P < 0.05, Average Ratio > 1.2 or Average Ratio < −1.2) and four upregulated proteins (including heat shock protein 60 (HSP 60), desmin, PDZ and LIM domain protein 1, and proteasome subunit alpha type-1) and three downregulated proteins (including tropomyosin alpha-1 chain, malate dehydrogenase, and chaperone activity of bc1 complex homolog) were determined. Conclusion. These seven proteins, especially HSP 60, may serve as potential biomarkers for the diagnosis of RHD and provide evidence to explain the mechanisms of this complex disease in the future.
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12
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Pawlak A, Gil RJ, Grajkowska W, Nasierowska-Guttmejer AM, Rzezak J, Kulawik T. Significance of low desmin expression in cardiomyocytes in patients with idiopathic dilated cardiomyopathy. Am J Cardiol 2013. [PMID: 23178054 DOI: 10.1016/j.amjcard.2012.09.036] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Desmin plays an essential role in maintaining cell cytoarchitecture, positioning and functioning of organelles, and the intercellular signaling pathway. It has been suggested that remodeling of desmin cytoskeleton might contribute to the progression of idiopathic dilated cardiomyopathy and might affect patients' long-term prognosis. We performed endomyocardial biopsy in 200 patients with idiopathic dilated cardiomyopathy. A total of 5 to 6 specimens were collected from the left ventricular (LV) wall. Desmin was detected with immunohistochemical staining and Western blotting. Immunohistochemistry revealed 4 types of desmin expression: I, normal staining at Z-lines and intercalated disks, giving a regular cross-section pattern; IIA, increased desmin staining at Z-lines and intercalated disks; IIB, increased desmin staining with irregular pattern of cross-striation and/or with presence of aggregates; and III, decreased or lack of desmin staining. Patients with type III had a greater New York Heart Association class and N-terminal pro-brain natriuretic peptide level, larger LV end-diastolic diameter, and lower LV ejection fraction than patients with type I (p <0.001). At the end of follow-up (mean duration 59 ± 33 months), 44 patients (22%) had died and 5 (2.5%) had undergone heart transplantation. Patients with type III had an increased risk of death or heart transplantation in univariate Cox proportional hazard regression models (adjusted hazard ratio 7.18, 95% confidence interval 2.96 to 17.40, p <0.001) and multivariate models (New York Heart Association class, LV end-diastolic diameter, LV ejection fraction, N-terminal pro-brain natriuretic peptide, gender, and age; hazard ratio 5.24, 95% confidence interval 1.58 to 17.38, p = 0.007). In conclusion, in patients with idiopathic dilated cardiomyopathy, a decrease or lack of desmin expression seems to be a strong, independent predictor of an unfavorable prognosis. Our outcomes support the relevance of exploring desmin expression as a potential target to treat heart failure progression.
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Affiliation(s)
- Agnieszka Pawlak
- Department of Invasive Cardiology, Central Clinical Hospital of Ministry of Internal Affairs and Administration, Warsaw, Poland.
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Pawlak A, Gil RJ, Kulawik T, Pronicki M, Karkucińska-Więckowska A, Szymańska-Dębińska T, Gil K, Lagwinski N, Czarnowska E. Type of desmin expression in cardiomyocytes - a good marker of heart failure development in idiopathic dilated cardiomyopathy. J Intern Med 2012; 272:287-97. [PMID: 22292457 DOI: 10.1111/j.1365-2796.2012.02524.x] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
AIM The aim of this study was to determine whether remodelling of the desmin (DES) cytoskeleton affects myocardial function and whether it could be a useful marker of disease progression in patients with idiopathic dilated cardiomyopathy (IDCM). MATERIAL AND METHODS Endomyocardial biopsy was performed in 195 IDCM patients, and five to six specimens were collected from the left ventricle. DES expression was evaluated using tissue immunostaining and Western blotting. The study population was assigned to four groups according to DES expression type: I, normal DES staining at Z-lines giving a regular pattern of cross-striation (n = 57); IIA, increased DES staining with a regular pattern of cross-striation (n = 40); IIB, increased DES staining with an irregular pattern of cross-striation and/or the presence of aggregates (n = 56); and III, decreased/lack of DES staining (n = 42). Fibrosis, cardiomyocyte hypertrophy and ultrastructure were assessed for the four types of DES expression. RESULTS The pathological types of DES expression (IIB or III) were associated with pathological changes in mitochondria and the contractile apparatus. Cardiomyocyte diameter and level of fibrosis were both significantly affected. DES expression type correlated with NYHA class, left ventricular end-diastolic diameter, left ventricular ejection fraction and the level of N-terminal pro-brain natriuretic protein. CONCLUSION The type of immunohistochemical DES expression correlated with the level of myocardial injury at the cellular and organ levels. This correlation was similar to that observed between DES expression and the well-established biochemical, echocardiographic and clinical parameters of heart failure (HF). DES expression type could be used as an important diagnostic feature of HF development.
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Affiliation(s)
- A Pawlak
- Department of Invasive Cardiology, Central Clinical Hospital of Ministry of Internal Affairs and Administration, Warsaw, Poland.
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14
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Mercuro G, Bassareo PP, Flore G, Fanos V, Dentamaro I, Scicchitano P, Laforgia N, Ciccone MM. Prematurity and low weight at birth as new conditions predisposing to an increased cardiovascular risk. Eur J Prev Cardiol 2012; 20:357-67. [PMID: 22345683 DOI: 10.1177/2047487312437058] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
Although the survival rate for preterm subjects has improved considerably, due to the progress in the field of perinatal medicine, preterm birth is frequently the cause underlying a series of notorious complications: morphological, neurological, ophthalmological, and renal alterations. In addition, it has recently been demonstrated how low gestational age and reduced foetal growth contribute towards an increased cardiovascular risk in preterm neonates. In fact, cardiovascular mortality is higher among former preterm adults than those born at term. This condition is referred to as cardiovascular perinatal programming. In the light of the above, an early, constant, and prolonged cardiological followup programme should be implemented in former preterm individuals. The aim of this paper was to perform a comprehensive literature review about two new emerging conditions predisposing to an increased cardiovascular risk: prematurity and low weight at birth.
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Galasso G, De Rosa R, Piscione F, Iaccarino G, Vosa C, Sorriento D, Piccolo R, Rapacciuolo A, Walsh K, Chiariello M. Myocardial expression of FOXO3a-Atrogin-1 pathway in human heart failure. Eur J Heart Fail 2011; 12:1290-6. [PMID: 21098579 DOI: 10.1093/eurjhf/hfq102] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
AIMS Several studies have shown that muscle mass loss is an important pathogenic issue in heart failure (HF). Atrogin-1 is a F-box protein selectively expressed in cardiac and skeletal muscle tissue, which plays a pivotal role in muscle wasting regulation. The aim of this study was to investigate the expression of Atrogin-1 and the molecular pathway involved in Atrogin-1 regulation in human HF. METHODS AND RESULTS Cardiac tissue from patients with HF (HF group: n=10) or with normal left ventricular function (control group: n=9) was studied by western blot and real time-PCR analysis. Linear regression analysis between patients left ventricular ejection fraction (LVEF) and Atrogin1 or its regulator Forkhead box O 3a (Foxo3a) myocardial expression was performed to test correlations between protein expression and LVEF. Western blot analysis revealed that the myocardial expression of Atrogin-1 in the HF group was 2.5-fold increased compared with controls (P=0.007). Accordingly, Atrogin-1 mRNA was 1.5 higher than in controls (P=0.003). The expression of Foxo3a and its up-stream regulator AKT were also measured. Western blot analysis demonstrated in the HF group a 2.56-fold reduction of AKT phosphorylation and a 3.32-fold increase of Foxo3a as compared with controls (P=0.002 and P=0.001, respectively). Finally, linear regression showed a significant relationship between Foxo3a or Atrogin-1 expression and LVEF (R=0.976, P<0.0001 and R=0.895, P=0.003, respectively). CONCLUSION Our results suggest that in human HF, the activity of AKT decreases, with activation of Foxo3a and induction of Atrogin-1, thereby leading to a molecular state that favours heart muscle loss and left ventricular dysfunction.
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Affiliation(s)
- Gennaro Galasso
- Department of Clinical Medicine, Cardiovascular and Immunology Sciences, Federico II University School of Medicine, Via S. Pansini, 5, 80131 Naples, Italy
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Agnetti G, Husberg C, Van Eyk JE. Divide and conquer: the application of organelle proteomics to heart failure. Circ Res 2011; 108:512-26. [PMID: 21335433 PMCID: PMC3936251 DOI: 10.1161/circresaha.110.226910] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/08/2010] [Accepted: 11/19/2010] [Indexed: 01/16/2023]
Abstract
Chronic heart failure is a worldwide cause of mortality and morbidity and is the final outcome of a number of different etiologies. This reflects both the complexity of the disease and our incomplete understanding of its underlying molecular mechanisms. One experimental approach to address this is to study subcellular organelles and how their functions are activated and synchronized under physiological and pathological conditions. In this review, we discuss the application of proteomic technologies to organelles and how this has deepened our perception of the cellular proteome and its alterations with heart failure. The use of proteomics to monitor protein quantity and posttranslational modifications has revealed a highly intricate and sophisticated level of protein regulation. Posttranslational modifications have the potential to regulate organelle function and interplay most likely by targeting both structural and signaling proteins throughout the cell, ultimately coordinating their responses. The potentials and limitations of existing proteomic technologies are also discussed emphasizing that the development of novel methods will enhance our ability to further investigate organelles and decode intracellular communication.
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Affiliation(s)
- Giulio Agnetti
- The Johns Hopkins Bayview Proteomics Center, Johns Hopkins University, Baltimore, US
- INRC, Dept. of Biochemistry, University of Bologna, Italy
| | - Cathrine Husberg
- The Johns Hopkins Bayview Proteomics Center, Johns Hopkins University, Baltimore, US
- Institute for Experimental Medical Research, Oslo University Hospital - Ullevaal, Norway
| | - Jennifer E. Van Eyk
- The Johns Hopkins Bayview Proteomics Center, Johns Hopkins University, Baltimore, US
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17
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Mackiewicz U, Mączewski M, Klemenska E, Brudek M, Konior A, Czarnowska E, Lewartowski B. Brief postinfarction calcineurin blockade affects left ventricular remodeling and Ca2+ handling in the rat. J Mol Cell Cardiol 2010; 48:1307-15. [DOI: 10.1016/j.yjmcc.2009.12.016] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/11/2009] [Revised: 12/02/2009] [Accepted: 12/21/2009] [Indexed: 10/20/2022]
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18
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Hamdani N, Paulus WJ, van Heerebeek L, Borbély A, Boontje NM, Zuidwijk MJ, Bronzwaer JGF, Simonides WS, Niessen HWM, Stienen GJM, van der Velden J. Distinct myocardial effects of beta-blocker therapy in heart failure with normal and reduced left ventricular ejection fraction. Eur Heart J 2009; 30:1863-72. [PMID: 19487234 DOI: 10.1093/eurheartj/ehp189] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Abstract
AIMS Left ventricular (LV) myocardial structure and function differ in heart failure (HF) with normal (N) and reduced (R) LV ejection fraction (EF). This difference could underlie an unequal outcome of trials with beta-blockers in heart failure with normal LVEF (HFNEF) and heart failure with reduced LVEF (HFREF) with mixed results observed in HFNEF and positive results in HFREF. To investigate whether beta-blockers have distinct myocardial effects in HFNEF and HFREF, myocardial structure, cardiomyocyte function, and myocardial protein composition were compared in HFNEF and HFREF patients without or with beta-blockers. METHODS AND RESULTS Patients, free of coronary artery disease, were divided into beta-(HFNEF) (n = 16), beta+(HFNEF) (n = 16), beta-(HFREF) (n = 17), and beta+(HFREF) (n = 22) groups. Using LV endomyocardial biopsies, we assessed collagen volume fraction (CVF) and cardiomyocyte diameter (MyD) by histomorphometry, phosphorylation of myofilamentary proteins by ProQ-Diamond phosphostained 1D-gels, and expression of beta-adrenergic signalling and calcium handling proteins by western immunoblotting. Cardiomyocytes were also isolated from the biopsies to measure active force (F(active)), resting force (F(passive)), and calcium sensitivity (pCa(50)). Myocardial effects of beta-blocker therapy were either shared by HFNEF and HFREF, unique to HFNEF or unique to HFREF. Higher F(active), higher pCa(50), lower phosphorylation of troponin I and myosin-binding protein C, and lower beta(2) adrenergic receptor expression were shared. Higher F(passive), lower CVF, lower MyD, and lower expression of stimulatory G protein were unique to HFNEF and lower expression of inhibitory G protein was unique to HFREF. CONCLUSION Myocardial effects unique to either HFNEF or HFREF could contribute to the dissimilar outcome of beta-blocker therapy in both HF phenotypes.
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Affiliation(s)
- Nazha Hamdani
- Laboratory for Physiology, Institute for Cardiovascular Research, VU University Medical Center, van der Boechorststraat 7, 1081 BT Amsterdam, the Netherlands
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19
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Chimenti C, Hamdani N, Boontje NM, DeCobelli F, Esposito A, Bronzwaer JGF, Stienen GJM, Russo MA, Paulus WJ, Frustaci A, van der Velden J. Myofilament degradation and dysfunction of human cardiomyocytes in Fabry disease. THE AMERICAN JOURNAL OF PATHOLOGY 2008; 172:1482-90. [PMID: 18467700 PMCID: PMC2408409 DOI: 10.2353/ajpath.2008.070576] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 02/21/2008] [Indexed: 11/20/2022]
Abstract
Early detection of myocardial dysfunction in Fabry disease (FD) cardiomyopathy suggests the contribution of myofilament structural alterations. Six males with untreated FD cardiomyopathy submitted to cardiac studies, including tissue Doppler imaging and left ventricular endomyocardial biopsy. Active and resting tensions before and after treatment with protein kinase A (PKA) were determined in isolated Triton-permeabilized cardiomyocytes. Cardiomyocyte cross-sectional area, glycosphingolipid vacuole area, myofibrillolysis, and extent of fibrosis were also determined. Biopsies of mitral stenosis in patients with normal left ventricles served as controls. Active tension was four times lower in FD cardiomyocytes and correlated with extent of myofibrillolysis. Resting tension was six times higher in FD cardiomyocytes than in controls. PKA treatment decreased resting tension but did not affect active force. Protein analysis revealed troponin I and desmin degradation products. FD cardiomyocytes were significantly larger and filled with glycosphingolipids. Fibrosis was mildly increased compared with controls. Tissue Doppler imaging lengthening and shortening velocities were reduced in FD cardiomyocytes compared with controls, correlating with resting and active tensions, respectively, but not with cardiomyocyte area, percentage of glycosphingolipids, or extent of fibrosis. In conclusion, myofilament degradation and dysfunction contribute to FD cardiomyopathy. Partial reversal of high resting tension after pharmacological PKA treatment of cardiomyocytes suggests potential benefits from enzyme replacement therapy and/or energy-releasing agents.
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Affiliation(s)
- Cristina Chimenti
- Istituto di Ricovero e Cura a Carattere Scientifico San Raffaele La Pisana, Rome, Italy
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Effect of dl-praeruptorin A on desmin and vimentin content in rat ischemia/reperfusion myocardiocytes. Chin Med J (Engl) 2007. [DOI: 10.1097/00029330-200712020-00019] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022] Open
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21
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Beletskaya LV, Kupriyanova AG, Zaidenov VA, Kormer AY, Golts AM, Chestukhin VV, Kazakov EN, Shumakov VI. Altered cytoskeletal protein localization in cardiomyocytes of idiopathic cardiomyopathy patients. J Heart Lung Transplant 2007; 26:868-70. [PMID: 17692796 DOI: 10.1016/j.healun.2007.05.014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2007] [Revised: 05/17/2007] [Accepted: 05/28/2007] [Indexed: 11/26/2022] Open
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Liu Y, Havinga R, Bloks VW, Baller JF, van der Leij FR, Reijngoud DJ, Sauer PJJ, Kuipers F. Postnatal treatment with dexamethasone perturbs hepatic and cardiac energy metabolism and is associated with a sustained atherogenic plasma lipid profile in suckling rats. Pediatr Res 2007; 61:165-70. [PMID: 17237716 DOI: 10.1203/pdr.0b013e31802d89ff] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
Early exposure to glucocorticoids (GC) has been proposed to disturb hepatic and cardiac function in later life. In the present study, we evaluated early metabolic alterations upon GC treatment that may predispose to long-term abnormalities. Rats were injected with dexamethasone (DEX) at d 1, 2, and 3 after birth and controls received saline (SAL). Rats were killed at 2, 7, and 14 d of age. Compared with SAL, DEX induced lower plasma insulin levels, hyperglycemia, hyperketonemia, and dyslipidemia at 2 d. At the same time, DEX treatment significantly increased expression of gluconeogenic and fatty acid oxidation genes in liver and expression of genes involved fatty acid utilization in heart. At 7 d, DEX-treated rats showed insulin resistance with hyperlipidemia, whereas hepatic and cardiac gene expression patterns were largely normalized. Hyperlipidemia and a significantly increased hepatic triglyceride content in DEX-treated rats were prominent at 14 d without large differences in hepatic and cardiac gene expression patterns. Thus, neonatal DEX administration transiently affects cardiac and hepatic gene expression patterns in suckling rats associated with sustained effects on plasma glucose and lipid concentrations. Whether these early effects of DEX contribute to hepatic and cardiac abnormalities at adult age needs further evaluation.
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Affiliation(s)
- Yan Liu
- Department of Pediatrics, Center for Liver, Digestive, and Metabolic Diseases, University Medical Center Groningen, 9713 GZ Groningen, The Netherlands
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23
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Postiglione L, Montagnani S, Ladogana P, Castaldo C, Di Spigna G, Bruno EM, Turano M, De Santo L, Cudemo G, Cocozza S, de Divitiis O, Rossi G. Granulocyte Macrophage-Colony Stimulating Factor receptor expression on human cardiomyocytes from end-stage heart failure patients. Eur J Heart Fail 2006; 8:564-70. [PMID: 16480924 DOI: 10.1016/j.ejheart.2005.12.007] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/16/2005] [Revised: 07/20/2005] [Accepted: 12/07/2005] [Indexed: 11/29/2022] Open
Abstract
BACKGROUND In remodelling ventricles, the progression of heart failure is associated with structural changes involving the extra-cellular matrix (ECM) and the cytoskeleton of cardiomyocytes, associated with fibrosis, cellular damage and death. The role of some cytokines and haematopoietic growth factors in the mechanism of both damage and regeneration of cardiac tissue during acute myocardial infarction has been demonstrated. Following heart damage, the development of scarred tissue was considered to be the only outcome, since myocytes were considered to be terminally differentiated cells. However, recent studies in animal models and adult human hearts have shown that myocytes can proliferate under the modulation of several factors. AIMS To assess Granulocyte Macrophage-Colony Stimulating Factor (GM-CSF) receptor expression in healthy and diseased human hearts, and to evaluate the possible role of GM-CSF and its receptor in the regeneration of cardiac tissue in chronic cardiomyopathy. METHODS AND RESULTS GM-CSFR expression in human cardiac tissue from explanted hearts of ten patients with end-stage heart failure and in cardiac biopsies from eight normal human hearts was studied by immunohistochemistry, and cellular and molecular biology assays. Our results demonstrated an increase in GM-CSFR in cardiomyocytes from end-stage heart failure tissues as compared to normal control tissues. CONCLUSIONS We hypothesize that GM-CSF plays a role in apoptotic and/or ECM deposition processes as well as in cytoskeleton modification in the myocardium.
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Affiliation(s)
- Loredana Postiglione
- Department of Cellular and Molecular Biology and Pathology "L. Califano", "Federico II" University, Via S. Pansini, 5, Ed. 19, 80131 Naples, Italy
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Wilding JR, Lygate CA, Davies KE, Neubauer S, Clarke K. MLP accumulation and remodelling in the infarcted rat heart. Eur J Heart Fail 2006; 8:343-6. [PMID: 16330255 DOI: 10.1016/j.ejheart.2005.10.006] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/29/2004] [Revised: 10/05/2005] [Accepted: 10/10/2005] [Indexed: 11/28/2022] Open
Abstract
Mutation of cytoskeletal protein genes results in abnormal protein function and causes cardiomyopathy. We hypothesised that cardiac levels of cytoskeletal proteins, such as dystrophin, desmin and muscle LIM protein (MLP), would be altered during remodelling caused by myocardial infarction (MI). We measured left-ventricular morphology, function and cytoskeletal protein levels 10 weeks after coronary artery ligation or sham operation in male Wistar rats. Two-dimensional echocardiography revealed significant impairment of systolic function and decreased ejection fraction in infarcted hearts compared with sham (47+/-5% versus 73+/-4%), commensurate with the development of heart failure. Western blotting was used to measure levels of beta-myosin heavy chain (beta-MyHC), a marker of hypertrophy, and levels of dystrophin, desmin, MLP, beta-tubulin, utrophin and syncoilin, using GAPDH for normalization. Relative to shams, beta-MyHC and MLP levels were increased 1.9-fold and 1.7-fold, respectively, in infarcted rat hearts, whereas the levels of other cytoskeletal proteins were unchanged. Both MLP and desmin protein levels correlated negatively with ejection fraction, with the strongest relation between MLP and ejection fraction (r=-0.95, n=13, p<0.0001). This work suggests that MLP may play an important compensatory role in cardiac remodelling following MI.
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Affiliation(s)
- James R Wilding
- Department of Physiology, University of Oxford, Oxford, England, UK.
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