1
|
Silveira CFSMP, Campos DHS, Freire PP, Deus AF, Okoshi K, Padovani CR, Cicogna AC. Importance of SERCA2a on early isolated diastolic dysfunction induced by supravalvular aortic stenosis in rats. ACTA ACUST UNITED AC 2017; 50:e5742. [PMID: 28423119 PMCID: PMC5441282 DOI: 10.1590/1414-431x20175742] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2016] [Accepted: 02/10/2017] [Indexed: 01/19/2023]
Abstract
Cardiac remodeling is defined as changes in shape and function of the heart in response to aggression (pressure overload). The sarcoplasmic reticulum calcium ATPase cardiac isoform 2a (SERCA2a) is a known factor that influences function. A wide spectrum of studies report a decrease in SERCA2a in heart failure, but none evaluate it's the role in early isolated diastolic dysfunction in supravalvular aortic stenosis (AoS). Our hypothesis was that SERCA2a participates in such dysfunction. Thirty-day-old male Wistar rats (60-80 g) were divided into AoS and Sham groups, which were submitted to surgery with or without aorta clipping, respectively. After 6 weeks, the animals were submitted to echocardiogram and functional analysis by isolated papillary muscle (IPM) in basal condition, hypoxia, and SERCA2a blockage with cyclopiazonic acid at calcium concentrations of 0.5, 1.5, and 2.5 mM. Western-blot analyses were used for SERCA2a and phospholamban detection. Data analysis was carried out with Student's t-test and ANOVA. AoS enhanced left atrium and E and A wave ratio, with preserved ejection fraction. Basal condition in IPM showed similar increases in developed tension (DT) and resting tension (RT) in AoS, and hypoxia was similar between groups. After cyclopiazonic acid blockage, final DT was equally decreased and RT was similar between groups, but the speed of relaxation was decreased in the AoS group. Western-blot was uniform in all evaluations. The hypothesis was confirmed, since functional parameters regarding SERCA2a were changed in the AoS group.
Collapse
Affiliation(s)
- C F S M P Silveira
- Departamento de Clínica Médica, Faculdade de Medicina de Botucatu, Universidade Estadual Paulista, Botucatu, SP, Brasil
| | - D H S Campos
- Departamento de Clínica Médica, Faculdade de Medicina de Botucatu, Universidade Estadual Paulista, Botucatu, SP, Brasil
| | - P P Freire
- Departamento de Clínica Médica, Faculdade de Medicina de Botucatu, Universidade Estadual Paulista, Botucatu, SP, Brasil
| | - A F Deus
- Departamento de Clínica Médica, Faculdade de Medicina de Botucatu, Universidade Estadual Paulista, Botucatu, SP, Brasil
| | - K Okoshi
- Departamento de Clínica Médica, Faculdade de Medicina de Botucatu, Universidade Estadual Paulista, Botucatu, SP, Brasil
| | - C R Padovani
- Departamento de Bioestatística, Instituto de Biociências, Universidade Estadual Paulista, Botucatu, SP, Brasil
| | - A C Cicogna
- Departamento de Clínica Médica, Faculdade de Medicina de Botucatu, Universidade Estadual Paulista, Botucatu, SP, Brasil
| |
Collapse
|
2
|
Mariani JA, Smolic A, Preovolos A, Byrne MJ, Power JM, Kaye DM. Augmentation of left ventricular mechanics by recirculation-mediated AAV2/1-SERCA2a gene delivery in experimental heart failure. Eur J Heart Fail 2014; 13:247-53. [DOI: 10.1093/eurjhf/hfq234] [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: 11/14/2022] Open
Affiliation(s)
- Justin A. Mariani
- Heart Failure Research Group, Baker IDI Heart and Diabetes Institute; PO Box 6492 St Kilda Rd Central Melbourne VIC 8008 Australia
| | - Anka Smolic
- Heart Failure Research Group, Baker IDI Heart and Diabetes Institute; PO Box 6492 St Kilda Rd Central Melbourne VIC 8008 Australia
| | - Arthur Preovolos
- Heart Failure Research Group, Baker IDI Heart and Diabetes Institute; PO Box 6492 St Kilda Rd Central Melbourne VIC 8008 Australia
| | - Melissa J. Byrne
- Heart Failure Research Group, Baker IDI Heart and Diabetes Institute; PO Box 6492 St Kilda Rd Central Melbourne VIC 8008 Australia
| | - John M. Power
- Heart Failure Research Group, Baker IDI Heart and Diabetes Institute; PO Box 6492 St Kilda Rd Central Melbourne VIC 8008 Australia
| | - David M. Kaye
- Heart Failure Research Group, Baker IDI Heart and Diabetes Institute; PO Box 6492 St Kilda Rd Central Melbourne VIC 8008 Australia
| |
Collapse
|
3
|
Johnsen AB, Høydal M, Røsbjørgen R, Stølen T, Wisløff U. Aerobic interval training partly reverse contractile dysfunction and impaired Ca2+ handling in atrial myocytes from rats with post infarction heart failure. PLoS One 2013; 8:e66288. [PMID: 23799089 PMCID: PMC3682943 DOI: 10.1371/journal.pone.0066288] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2012] [Accepted: 05/05/2013] [Indexed: 11/19/2022] Open
Abstract
BACKGROUND There is limited knowledge about atrial myocyte Ca(2+) handling in the failing hearts. The aim of this study was to examine atrial myocyte contractile function and Ca(2+) handling in rats with post-infarction heart failure (HF) and to examine whether aerobic interval training could reverse a potential dysfunction. METHODS AND RESULTS Post-infarction HF was induced in Sprague Dawley rats by ligation of the left descending coronary artery. Atrial myocyte shortening was depressed (p<0.01) and time to relaxation was prolonged (p<0.01) in sedentary HF-rats compared to healthy controls. This was associated with decreased Ca(2+) amplitude, decreased SR Ca(2+) content, and slower Ca(2+) transient decay. Atrial myocytes from HF-rats had reduced sarcoplasmic reticulum Ca(2+) ATPase activity, increased Na(+)/Ca(2+)-exchanger activity and increased diastolic Ca(2+) leak through ryanodine receptors. High intensity aerobic interval training in HF-rats restored atrial myocyte contractile function and reversed changes in atrial Ca(2+) handling in HF. CONCLUSION Post infarction HF in rats causes profound impairment in atrial myocyte contractile function and Ca(2+) handling. The observed dysfunction in atrial myocytes was partly reversed after aerobic interval training.
Collapse
Affiliation(s)
- Anne Berit Johnsen
- K.G. Jebsen Center of Exercise in Medicine, Department of Circulation and Medical Imaging, Faculty of Medicine, Norwegian University of Science and Technology, Trondheim, Norway
| | - Morten Høydal
- K.G. Jebsen Center of Exercise in Medicine, Department of Circulation and Medical Imaging, Faculty of Medicine, Norwegian University of Science and Technology, Trondheim, Norway
| | - Ragnhild Røsbjørgen
- K.G. Jebsen Center of Exercise in Medicine, Department of Circulation and Medical Imaging, Faculty of Medicine, Norwegian University of Science and Technology, Trondheim, Norway
| | - Tomas Stølen
- K.G. Jebsen Center of Exercise in Medicine, Department of Circulation and Medical Imaging, Faculty of Medicine, Norwegian University of Science and Technology, Trondheim, Norway
| | - Ulrik Wisløff
- K.G. Jebsen Center of Exercise in Medicine, Department of Circulation and Medical Imaging, Faculty of Medicine, Norwegian University of Science and Technology, Trondheim, Norway
- * E-mail:
| |
Collapse
|
4
|
Hauser M, Petzuch K, Kühn A, Schön P, Elmenhorst J, Schönfelder M, Oberhoffer R, Vogt MO. The Munich Triathlon Heart Study: ventricular function, myocardial velocities, and two-dimensional strain in healthy children before and after endurance stress. Pediatr Cardiol 2013; 34:576-82. [PMID: 22961347 DOI: 10.1007/s00246-012-0500-8] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/29/2012] [Accepted: 08/26/2012] [Indexed: 10/27/2022]
Abstract
Intense exercise has been shown to have negative effects on systolic and diastolic ventricular function in adults. Very little is known about the normal reaction of the growing heart to endurance stress. For this study, 26 healthy children (18 males) with a mean age of 12.61 years (range, 7.92-16.42 years) took part in an age-adapted triathlon circuit. The athletes were investigated by two-dimensional (2D) echocardiographic/speckle tracking, M-mode, pulse-wave Doppler, color Doppler, and color-coded tissue Doppler at 2-4 weeks before and immediately after the race. After the competition, cardiac output increased, mediated by an increase in heart rate and not by an elevated preload, according the Frank-Starling mechanism. Two-dimensional speckle tracking showed a reduced longitudinal strain in the right and left ventricles and additionally reduced circumferential strain in the left ventricle. The late diastolic inflow velocities were increased in both ventricles, indicating reduced diastolic function due to an impairment of myocardial relaxation. Immediately after endurance exercise, systolic and diastolic functions were attenuated in children and adolescents. In contrast to adult studies, this study could show a heart rate-mediated increase in cardiac output. The sequelae of these alterations are unclear, and the growing heart especially may be more susceptible to myocardial damage caused by intense endurance stress.
Collapse
Affiliation(s)
- Michael Hauser
- Department of Paediatric Cardiology and Congenital Heart Disease, German Heart Centre, Lazarettstrasse 36, 80636, Munich, Germany.
| | | | | | | | | | | | | | | |
Collapse
|
5
|
Bengel FM. Noninvasive Imaging of Cardiac Gene Expression and Its Future Implications for Molecular Therapy. Mol Imaging Biol 2005; 7:22-9. [PMID: 15912272 DOI: 10.1007/s11307-005-0923-1] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
Innovative approaches for cardiovascular molecular therapy are rapidly evolving, and translational efforts from experimental to clinical application are increasing. Gene and cell therapy hold promise for treatment of heart disease, but despite progress, some basic principles are still under development. Open issues are, e.g., related to the optimal method for delivery, to therapeutic efficacy, to time course and magnitude of gene expression, and to the fate of transplanted cells in target and remote areas. The use of reporter genes and labeled reporter probes for noninvasive imaging provides the methodology to address these questions by assessment of location, magnitude, and persistence of transgene expression in the heart and the whole body. Coexpression of a reporter gene allows for indirect imaging of the expression of a therapeutic gene of choice. Furthermore, reporter genes can be transferred to stem cells prior to transplantation for serial monitoring of cell viability using gene product imaging. Additionally, functional effects of therapy on the tissue level can be identified using established imaging approaches to determine blood flow, metabolism, innervation, or cell death. Measures of transgene expression can then be linked to physiologic effects and will refine the understanding of basic therapeutic mechanisms. Noninvasive gene-targeted imaging will thus enhance the determination of therapeutic effects in cardiovascular molecular therapy in the future.
Collapse
Affiliation(s)
- Frank M Bengel
- Nuklearmedizinische Klinik und Poliklinik, Technische Universität München, Klinikum rechts der Isar, Ismaninger Str. 22, 81675, Munich, Germany.
| |
Collapse
|
6
|
Bernecker OY, del Monte F, Hajjar RJ. Gene therapy for the treatment of heart failure--calcium signaling. Semin Thorac Cardiovasc Surg 2003; 15:268-76. [PMID: 12973704 DOI: 10.1016/s1043-0679(03)70006-9] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The knowledge of molecular mechanisms indicated in cardiac dysfunction has increased dramatically over the last decade and yields considerable potential for new treatment options in heart failure. Alterations in intracellular calcium signaling play a crucial role in the pathophysiology of heart failure, and in recent years, somatic gene transfer has been identified as an important tool to help understand the relative contribution of specific calcium-handling proteins in heart failure. This article reviews recent advances in gene delivery techniques aimed at global myocardial transfection and discusses molecular therapeutic targets identified within intracellular calcium signaling pathways in heart failure.
Collapse
Affiliation(s)
- Oliver Y Bernecker
- Program in Cardiovascular Gene Therapy, Cardiovascular Research Center, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA
| | | | | |
Collapse
|
7
|
Reilly AM, Petrou S, Panchal RG, Williams DA. Restoration of calcium handling properties of adult cardiac myocytes from hypertrophied hearts. Cell Calcium 2001; 30:59-66. [PMID: 11396988 DOI: 10.1054/ceca.2001.0213] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Reductions in cardiac sarcoplasmic reticulum calcium-ATPase (Serca2a) levels are thought to underlie the prolonged calcium (Ca(2+)) transients and consequent reduced contractile performance seen in human cardiac hypertrophy and heart failure. In freshly isolated cardiac myocytes from rats with monocrotaline-induced right ventricular hypertrophy we found reduced sarcoplasmic reticulum Serca2a expression and prolonged Ca(2+)transients, characteristic of hypertrophic cardiac disease. Modulation of intracellular Ca(2+)levels, Ca(2+) kinetics or Ca(2+)sensitivity is the focus of many current therapeutic approaches to improve contractile performance in the hypertrophic or failing heart. However, the functional effects of increasing Serca2a expression on Ca(2+) handling properties in myocytes from an animal model of cardiac hypertrophy are largely unknown. Here, we describe enhancement of the deficient Ca(2+) handling properties evident in myocytes from hypertrophied hearts following adenoviral-mediated transfer of the human Serca2a gene to these myocytes. These results highlight the importance of Serca2a deficiencies in the hypertrophic phenotype of cardiac muscle and suggest a simple, effective approach for manipulation of normal cardiac function.
Collapse
Affiliation(s)
- A M Reilly
- Molecular Physiology Laboratory, Department of Physiology, University of Melbourne, Melbourne, Australia
| | | | | | | |
Collapse
|
8
|
|
9
|
Abstract
Recent improvements in both gene transfer vectors and in vivo gene delivery techniques have facilitated genetic manipulation of myocardial function and enabled targeted therapy of animal models of cardiac disease and, in particular, heart failure. Increases in myocardial perfusion, improved calcium handling, and enhanced beta-adrenergic receptor signaling have all been achieved by gene transfer in animal models, and appear to be important determinants of myocardial function. Increased understanding of the molecular etiologies of myocardial disease processes combined with advances in vectors and gene delivery will facilitate the development of novel therapies and represent important progress in the effort to make myocardial gene therapy a clinical reality beyond experimental protocols.
Collapse
Affiliation(s)
- D C White
- Department of Surgery, Box 2606, MSRB Room 471, Duke University Medical Center, Durham, NC 27710, USA
| | | |
Collapse
|
10
|
Lehnart SE, Janssen PM, Franz WM, Donahue JK, Lawrence JH, Marbán E, Prestle J, Hasenfuss G. Preservation of myocardial function after adenoviral gene transfer in isolated myocardium. Am J Physiol Heart Circ Physiol 2000; 279:H986-91. [PMID: 10993759 DOI: 10.1152/ajpheart.2000.279.3.h986] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Adenoviral gene transfer to the heart represents a promising model for structure-function analyses. Rabbit hearts were subjected to an ex vivo perfusion protocol that achieves gene transfer in >90% of cardiac myocytes. Contractile function of isolated myocardial preparations of these hearts was then observed for 2 days in a recently developed trabecula culture system. In sham-infected hearts, the initial developed force (F(init)) (15.6 +/- 3.7 mN/mm(2); n = 12) did not change significantly after 48 h (17.0 +/- 1.9 mN/mm(2); P = 0.46). In adenovirus-infected preparations, F(init) (14.3 +/- 1. 8 mN/mm(2); n = 21) did not significantly differ from the control (P = 0.75) and was unchanged after 48 h (15.3 +/- 2.5 mN/mm(2); P = 0. 93). After 2 days of continuous contractions, we observed homogenous and high-level expression of the reporter genes LacZ coding for beta-galactosidase and Luc coding for firefly luciferase. Luciferase activity increased more than 2,500-fold from background levels of 8. 7 x 10(3 )+/- 5.0 x 10(3) relative light units (RLU)/mg protein (from hearts transfected with promotorless adenovirus with luciferase transgene construct AdNULLLuc, n = 5) to 23.4 x 10(6)+/- 11.1 x 10(6)RLU/mg protein (from hearts tranfected with adenovirus with Rous sarcoma virus promotor and luciferase transgene construct AdRSVLuc, n = 5) in infected myocardial preparations (P < 0.005). Our results demonstrate a new ex vivo approach to achieve homogenous and high-level expression of recombinant adenoviral genes in contracting myocardium without adverse functional effects.
Collapse
Affiliation(s)
- S E Lehnart
- Abteilung Kardiologie und Pneumologie, Universität Göttingen, D-37075 Göttingen, Germany.
| | | | | | | | | | | | | | | |
Collapse
|
11
|
Miyamoto MI, del Monte F, Schmidt U, DiSalvo TS, Kang ZB, Matsui T, Guerrero JL, Gwathmey JK, Rosenzweig A, Hajjar RJ. Adenoviral gene transfer of SERCA2a improves left-ventricular function in aortic-banded rats in transition to heart failure. Proc Natl Acad Sci U S A 2000; 97:793-8. [PMID: 10639159 PMCID: PMC15410 DOI: 10.1073/pnas.97.2.793] [Citation(s) in RCA: 415] [Impact Index Per Article: 17.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
In human and experimental models of heart failure, sarcoplasmic reticulum Ca(2+) ATPase (SERCA2a) activity is decreased, resulting in abnormal calcium handling. The disturbances in calcium metabolism have been shown to contribute significantly to the contractile dysfunction observed in heart failure. We investigated whether increasing SERCA2a expression can improve ventricular function in an animal model of heart failure obtained by creating ascending aortic constriction in rats. After 19-23 wk of banding during the transition from compensated hypertrophy to heart failure (documented by >25% decrease in fractional shortening), rats were randomized to receive either an adenovirus carrying the SERCA2a gene (Ad.SERCA2a, n = 13) or beta-galactosidase (Ad.betagal, n = 14) by using a catheter-based technique. The failing hearts infected with Ad. betagal were characterized by a significant decrease in SERCA2a expression and a decrease in SERCA2a activity compared with nonfailing sham-operated rats (n = 11). In addition, these failing hearts had reduced left-ventricular systolic pressure, maximal rate of left-ventricular pressure rise and decline (+dP/dt, -dP/dt), and rate of isovolumic relaxation (tau). Overexpression of SERCA2a restored both SERCA2a expression and ATPase activity to nonfailing levels. Furthermore, rats infected with Ad.SERCA2a had significant improvement in left-ventricular systolic pressure, +dP/dt, -dP/dt, and rate of isovolumic relaxation (tau) normalizing them back to levels comparable to sham-operated rats. In this study, we show that in an animal model of heart failure where SERCA2a protein levels and activity are decreased and severe contractile dysfunction is present, overexpression of SERCA2a in vivo restores both systolic and diastolic function to normal levels.
Collapse
Affiliation(s)
- M I Miyamoto
- Cardiovascular Research Center, Massachusetts General Hospital, Boston, MA 02129, USA
| | | | | | | | | | | | | | | | | | | |
Collapse
|