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Geraets IME, Coumans WA, Strzelecka A, Schönleitner P, Antoons G, Schianchi F, Willemars MMA, Kapsokalyvas D, Glatz JFC, Luiken JJFP, Nabben M. Metabolic Interventions to Prevent Hypertrophy-Induced Alterations in Contractile Properties In Vitro. Int J Mol Sci 2021; 22:ijms22073620. [PMID: 33807195 PMCID: PMC8037191 DOI: 10.3390/ijms22073620] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2021] [Revised: 03/23/2021] [Accepted: 03/26/2021] [Indexed: 12/13/2022] Open
Abstract
(1) Background: The exact mechanism(s) underlying pathological changes in a heart in transition to hypertrophy and failure are not yet fully understood. However, alterations in cardiac energy metabolism seem to be an important contributor. We characterized an in vitro model of adrenergic stimulation-induced cardiac hypertrophy for studying metabolic, structural, and functional changes over time. Accordingly, we investigated whether metabolic interventions prevent cardiac structural and functional changes; (2) Methods: Primary rat cardiomyocytes were treated with phenylephrine (PE) for 16 h, 24 h, or 48 h, whereafter hypertrophic marker expression, protein synthesis rate, glucose uptake, and contractile function were assessed; (3) Results: 24 h PE treatment increased expression of hypertrophic markers, phosphorylation of hypertrophy-related signaling kinases, protein synthesis, and glucose uptake. Importantly, the increased glucose uptake preceded structural and functional changes, suggesting a causal role for metabolism in the onset of PE-induced hypertrophy. Indeed, PE treatment in the presence of a PAN-Akt inhibitor or of a GLUT4 inhibitor dipyridamole prevented PE-induced increases in cellular glucose uptake and ameliorated PE-induced contractile alterations; (4) Conclusions: Pharmacological interventions, forcing substrate metabolism away from glucose utilization, improved contractile properties in PE-treated cardiomyocytes, suggesting that targeting glucose uptake, independent from protein synthesis, forms a promising strategy to prevent hypertrophy and hypertrophy-induced cardiac dysfunction.
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Affiliation(s)
- Ilvy M. E. Geraets
- Department of Genetics & Cell Biology, Faculty of Health, Medicine and Life Sciences, Maastricht University, 6200-MD Maastricht, The Netherlands; (I.M.E.G.); (W.A.C.); (A.S.); (F.S.); (M.M.A.W.); (D.K.); (J.F.C.G.); (J.J.F.P.L.)
| | - Will A. Coumans
- Department of Genetics & Cell Biology, Faculty of Health, Medicine and Life Sciences, Maastricht University, 6200-MD Maastricht, The Netherlands; (I.M.E.G.); (W.A.C.); (A.S.); (F.S.); (M.M.A.W.); (D.K.); (J.F.C.G.); (J.J.F.P.L.)
| | - Agnieszka Strzelecka
- Department of Genetics & Cell Biology, Faculty of Health, Medicine and Life Sciences, Maastricht University, 6200-MD Maastricht, The Netherlands; (I.M.E.G.); (W.A.C.); (A.S.); (F.S.); (M.M.A.W.); (D.K.); (J.F.C.G.); (J.J.F.P.L.)
| | - Patrick Schönleitner
- Departments of Physiology, Maastricht University, 6200-MD Maastricht, The Netherlands; (P.S.); (G.A.)
- CARIM School for Cardiovascular Diseases, Maastricht University, 6200-MD Maastricht, The Netherlands
| | - Gudrun Antoons
- Departments of Physiology, Maastricht University, 6200-MD Maastricht, The Netherlands; (P.S.); (G.A.)
- CARIM School for Cardiovascular Diseases, Maastricht University, 6200-MD Maastricht, The Netherlands
| | - Francesco Schianchi
- Department of Genetics & Cell Biology, Faculty of Health, Medicine and Life Sciences, Maastricht University, 6200-MD Maastricht, The Netherlands; (I.M.E.G.); (W.A.C.); (A.S.); (F.S.); (M.M.A.W.); (D.K.); (J.F.C.G.); (J.J.F.P.L.)
| | - Myrthe M. A. Willemars
- Department of Genetics & Cell Biology, Faculty of Health, Medicine and Life Sciences, Maastricht University, 6200-MD Maastricht, The Netherlands; (I.M.E.G.); (W.A.C.); (A.S.); (F.S.); (M.M.A.W.); (D.K.); (J.F.C.G.); (J.J.F.P.L.)
| | - Dimitrios Kapsokalyvas
- Department of Genetics & Cell Biology, Faculty of Health, Medicine and Life Sciences, Maastricht University, 6200-MD Maastricht, The Netherlands; (I.M.E.G.); (W.A.C.); (A.S.); (F.S.); (M.M.A.W.); (D.K.); (J.F.C.G.); (J.J.F.P.L.)
| | - Jan F. C. Glatz
- Department of Genetics & Cell Biology, Faculty of Health, Medicine and Life Sciences, Maastricht University, 6200-MD Maastricht, The Netherlands; (I.M.E.G.); (W.A.C.); (A.S.); (F.S.); (M.M.A.W.); (D.K.); (J.F.C.G.); (J.J.F.P.L.)
- CARIM School for Cardiovascular Diseases, Maastricht University, 6200-MD Maastricht, The Netherlands
| | - Joost J. F. P. Luiken
- Department of Genetics & Cell Biology, Faculty of Health, Medicine and Life Sciences, Maastricht University, 6200-MD Maastricht, The Netherlands; (I.M.E.G.); (W.A.C.); (A.S.); (F.S.); (M.M.A.W.); (D.K.); (J.F.C.G.); (J.J.F.P.L.)
- Department of Clinical Genetics, Maastricht University Medical Center, 6200-MD Maastricht, The Netherlands
| | - Miranda Nabben
- Department of Genetics & Cell Biology, Faculty of Health, Medicine and Life Sciences, Maastricht University, 6200-MD Maastricht, The Netherlands; (I.M.E.G.); (W.A.C.); (A.S.); (F.S.); (M.M.A.W.); (D.K.); (J.F.C.G.); (J.J.F.P.L.)
- CARIM School for Cardiovascular Diseases, Maastricht University, 6200-MD Maastricht, The Netherlands
- Department of Clinical Genetics, Maastricht University Medical Center, 6200-MD Maastricht, The Netherlands
- Correspondence: ; Tel.: +31-43-3881998
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2
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Jin G, Manninger M, Adelsmayr G, Schwarzl M, Alogna A, Schönleitner P, Zweiker D, Blaschke F, Sherif M, Radulovic S, Wakula P, Schauer S, Höfler G, Reiter U, Reiter G, Post H, Scherr D, Acsai K, Antoons G, Pieske B, Heinzel FR. Cellular contribution to left and right atrial dysfunction in chronic arterial hypertension in pigs. ESC Heart Fail 2020; 8:151-161. [PMID: 33251761 PMCID: PMC7835565 DOI: 10.1002/ehf2.13087] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2020] [Revised: 09/02/2020] [Accepted: 10/22/2020] [Indexed: 12/13/2022] Open
Abstract
Aims Atrial contractile dysfunction contributes to worse prognosis in hypertensive heart disease (HHD), but the role of cardiomyocyte dysfunction in atrial remodelling in HHD is not well understood. We investigated and compared cellular mechanisms of left (LA) and right atrial (RA) contractile dysfunction in pigs with HHD. Methods and results In vivo electrophysiological and magnetic resonance imaging studies were performed in control and pigs treated with 11‐deoxycorticosterone acetate (DOCA)/high‐salt/glucose diet (12 weeks) to induce HHD. HHD leads to significant atrial remodelling and loss of contractile function in LA and a similar trend in RA (magnetic resonance imaging). Atrial remodelling was associated with a higher inducibility of atrial fibrillation but unrelated to changes in atrial refractory period or fibrosis (histology). Reduced atrial function in DOCA pigs was related to reduced contraction amplitude of isolated LA (already at baseline) and RA myocytes (at higher frequencies) due to reduced intracellular Ca release (Fura 2‐AM, field stimulation). However, Ca regulation differed in LA and RA cardiomyocytes: LA cardiomyocytes showed reduced sarcoplasmic reticulum (SR) [Ca], whereas in RA, SR [Ca] was unchanged and SR Ca2+‐ATPase activity was increased. Sodium–calcium exchanger (NCX) activity was not significantly altered. We used ORM‐10103 (3 μM), a specific NCX inhibitor to improve Ca availability in LA and RA cardiomyocytes from DOCA pigs. Partial inhibition of NCX increased Ca2+ transient amplitude and SR Ca in LA, but not RA cells. Conclusions In this large animal model of HHD, atrial remodelling in sinus rhythm in vivo was related to differential LA and RA cardiomyocyte dysfunction and Ca signalling. Selective acute inhibition of NCX improved Ca release in diseased LA cardiomyocytes, suggesting a potential therapeutic approach to improve atrial inotropy in HHD.
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Affiliation(s)
- Ge Jin
- Division of Cardiology, Medical University of Graz, Graz, Austria.,The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, China
| | - Martin Manninger
- Division of Cardiology, Medical University of Graz, Graz, Austria
| | | | - Michael Schwarzl
- Division of Cardiology, Medical University of Graz, Graz, Austria
| | - Alessio Alogna
- Department of Internal Medicine and Cardiology, Charité-Universitätsmedizin Berlin, Campus Virchow-Klinikum, Augustenburgerplatz 1, Berlin, 13353, Germany.,DZHK (German Centre for Cardiovascular Research), partner site Berlin, Berlin, Germany
| | | | - David Zweiker
- Division of Cardiology, Medical University of Graz, Graz, Austria
| | - Florian Blaschke
- Department of Internal Medicine and Cardiology, Charité-Universitätsmedizin Berlin, Campus Virchow-Klinikum, Augustenburgerplatz 1, Berlin, 13353, Germany.,DZHK (German Centre for Cardiovascular Research), partner site Berlin, Berlin, Germany
| | - Mohammad Sherif
- Department of Internal Medicine and Cardiology, Charité-Universitätsmedizin Berlin, Campus Virchow-Klinikum, Augustenburgerplatz 1, Berlin, 13353, Germany
| | | | - Paulina Wakula
- Department of Internal Medicine and Cardiology, Charité-Universitätsmedizin Berlin, Campus Virchow-Klinikum, Augustenburgerplatz 1, Berlin, 13353, Germany.,DZHK (German Centre for Cardiovascular Research), partner site Berlin, Berlin, Germany
| | - Sylvia Schauer
- Department of Pathology, Medical University of Graz, Graz, Austria
| | - Gerald Höfler
- Department of Pathology, Medical University of Graz, Graz, Austria
| | - Ursula Reiter
- Department of Radiology, Medical University of Graz, Graz, Austria
| | - Gert Reiter
- Research & Development, Siemens AG Healthcare, Vienna, Austria
| | - Heiner Post
- Department of Internal Medicine and Cardiology, Charité-Universitätsmedizin Berlin, Campus Virchow-Klinikum, Augustenburgerplatz 1, Berlin, 13353, Germany.,DZHK (German Centre for Cardiovascular Research), partner site Berlin, Berlin, Germany
| | - Daniel Scherr
- Division of Cardiology, Medical University of Graz, Graz, Austria
| | - Karoly Acsai
- Division of Pharmacology and Pharmacotherapy, University of Szeged, Szeged, Hungary
| | - Gudrun Antoons
- Faculty of Sciences, Department of Organic and Macromolecular Chemistry, Ghent University, Ghent, Belgium
| | - Burkert Pieske
- Department of Internal Medicine and Cardiology, Charité-Universitätsmedizin Berlin, Campus Virchow-Klinikum, Augustenburgerplatz 1, Berlin, 13353, Germany.,DZHK (German Centre for Cardiovascular Research), partner site Berlin, Berlin, Germany.,Department of Cardiology, German Heart Center Berlin (DHZB), Berlin, Germany
| | - Frank R Heinzel
- Department of Internal Medicine and Cardiology, Charité-Universitätsmedizin Berlin, Campus Virchow-Klinikum, Augustenburgerplatz 1, Berlin, 13353, Germany.,DZHK (German Centre for Cardiovascular Research), partner site Berlin, Berlin, Germany
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3
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Najafi A, van de Locht M, Schuldt M, Schönleitner P, van Willigenburg M, Bollen I, Goebel M, Ottenheijm CAC, van der Velden J, Helmes M, Kuster DWD. End-diastolic force pre-activates cardiomyocytes and determines contractile force: role of titin and calcium. J Physiol 2019; 597:4521-4531. [PMID: 31314138 PMCID: PMC6852589 DOI: 10.1113/jp277985] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2019] [Accepted: 07/10/2019] [Indexed: 12/22/2022] Open
Abstract
Titin functions as a molecular spring, and cardiomyocytes are able, through splicing, to control the length of titin. We hypothesized that together with diastolic [Ca2+], titin‐based stretch pre‐activates cardiomyocytes during diastole and is a major determinant of force production in the subsequent contraction. Through this mechanism titin would play an important role in active force development and length‐dependent activation. Mutations in the splicing factor RNA binding motif protein 20 (RBM20) result in expression of large, highly compliant titin isoforms. We measured single cardiomyocyte work loops that mimic the cardiac cycle in wild‐type (WT) and heterozygous (HET) RBM20‐deficient rats. In addition, we studied the role of diastolic [Ca2+] in membrane‐permeabilized WT and HET cardiomyocytes. Intact cardiomyocytes isolated from HET left ventricles were unable to produce normal levels of work (55% of WT) at low pacing frequencies, but this difference disappeared at high pacing frequencies. Length‐dependent activation (force–sarcomere length relationship) was blunted in HET cardiomyocytes, but the force–end‐diastolic force relationship was not different between HET and WT cardiomyocytes. To delineate the effects of diastolic [Ca2+] and titin pre‐activation on force generation, measurements were performed in detergent‐permeabilized cardiomyocytes. Cardiac twitches were simulated by transiently exposing permeabilized cardiomyocytes to 2 µm Ca2+. Increasing diastolic [Ca2+] from 1 to 80 nm increased force development twofold in WT. Higher diastolic [Ca2+] was needed in HET. These findings are consistent with our hypothesis that pre‐activation increases active force development. Highly compliant titin allows cells to function at higher diastolic [Ca2+].
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Affiliation(s)
- Aref Najafi
- Amsterdam UMC, Vrije Universiteit Amsterdam, Physiology, Amsterdam Cardiovascular Sciences, de Boelelaan 1117, 1081 HZ, Amsterdam, the Netherlands.,Netherlands Heart Institute, PO box 19258, 3501 DG, Utrecht, the Netherlands
| | - Martijn van de Locht
- Amsterdam UMC, Vrije Universiteit Amsterdam, Physiology, Amsterdam Cardiovascular Sciences, de Boelelaan 1117, 1081 HZ, Amsterdam, the Netherlands
| | - Maike Schuldt
- Amsterdam UMC, Vrije Universiteit Amsterdam, Physiology, Amsterdam Cardiovascular Sciences, de Boelelaan 1117, 1081 HZ, Amsterdam, the Netherlands
| | | | | | - Ilse Bollen
- Amsterdam UMC, Vrije Universiteit Amsterdam, Physiology, Amsterdam Cardiovascular Sciences, de Boelelaan 1117, 1081 HZ, Amsterdam, the Netherlands
| | - Max Goebel
- Amsterdam UMC, Vrije Universiteit Amsterdam, Physiology, Amsterdam Cardiovascular Sciences, de Boelelaan 1117, 1081 HZ, Amsterdam, the Netherlands
| | - Coen A C Ottenheijm
- Amsterdam UMC, Vrije Universiteit Amsterdam, Physiology, Amsterdam Cardiovascular Sciences, de Boelelaan 1117, 1081 HZ, Amsterdam, the Netherlands
| | - Jolanda van der Velden
- Amsterdam UMC, Vrije Universiteit Amsterdam, Physiology, Amsterdam Cardiovascular Sciences, de Boelelaan 1117, 1081 HZ, Amsterdam, the Netherlands.,Netherlands Heart Institute, PO box 19258, 3501 DG, Utrecht, the Netherlands
| | - Michiel Helmes
- Amsterdam UMC, Vrije Universiteit Amsterdam, Physiology, Amsterdam Cardiovascular Sciences, de Boelelaan 1117, 1081 HZ, Amsterdam, the Netherlands.,Ionoptix, de Boelelaan 1108, 1081 HV, Amsterdam, the Netherlands.,CytoCypher, de Boelelaan 1108, 1081 HV, Amsterdam, the Netherlands
| | - Diederik W D Kuster
- Amsterdam UMC, Vrije Universiteit Amsterdam, Physiology, Amsterdam Cardiovascular Sciences, de Boelelaan 1117, 1081 HZ, Amsterdam, the Netherlands
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4
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Sutanto H, van Sloun B, Schönleitner P, van Zandvoort MAMJ, Antoons G, Heijman J. The Subcellular Distribution of Ryanodine Receptors and L-Type Ca 2+ Channels Modulates Ca 2+-Transient Properties and Spontaneous Ca 2+-Release Events in Atrial Cardiomyocytes. Front Physiol 2018; 9:1108. [PMID: 30166973 PMCID: PMC6107030 DOI: 10.3389/fphys.2018.01108] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2018] [Accepted: 07/23/2018] [Indexed: 11/13/2022] Open
Abstract
Spontaneous Ca2+-release events (SCaEs) from the sarcoplasmic reticulum play crucial roles in the initiation of cardiac arrhythmias by promoting triggered activity. However, the subcellular determinants of these SCaEs remain incompletely understood. Structural differences between atrial and ventricular cardiomyocytes, e.g., regarding the density of T-tubular membrane invaginations, may influence cardiomyocyte Ca2+-handling and the distribution of cardiac ryanodine receptors (RyR2) has recently been shown to undergo remodeling in atrial fibrillation. These data suggest that the subcellular distribution of Ca2+-handling proteins influences proarrhythmic Ca2+-handling abnormalities. Here, we employ computational modeling to provide an in-depth analysis of the impact of variations in subcellular RyR2 and L-type Ca2+-channel distributions on Ca2+-transient properties and SCaEs in a human atrial cardiomyocyte model. We incorporate experimentally observed RyR2 expression patterns and various configurations of axial tubules in a previously published model of the human atrial cardiomyocyte. We identify an increased SCaE incidence for larger heterogeneity in RyR2 expression, in which SCaEs preferentially arise from regions of high local RyR2 expression. Furthermore, we show that the propagation of Ca2+ waves is modulated by the distance between RyR2 bands, as well as the presence of experimentally observed RyR2 clusters between bands near the lateral membranes. We also show that incorporation of axial tubules in various amounts and locations reduces Ca2+-transient time to peak. Furthermore, selective hyperphosphorylation of RyR2 around axial tubules increases the number of spontaneous waves. Finally, we present a novel model of the human atrial cardiomyocyte with physiological RyR2 and L-type Ca2+-channel distributions that reproduces experimentally observed Ca2+-handling properties. Taken together, these results significantly enhance our understanding of the structure-function relationship in cardiomyocytes, identifying that RyR2 and L-type Ca2+-channel distributions have a major impact on systolic Ca2+ transients and SCaEs.
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Affiliation(s)
- Henry Sutanto
- Department of Cardiology, CARIM School for Cardiovascular Diseases, Maastricht University, Maastricht, Netherlands
| | - Bart van Sloun
- Department of Cardiology, CARIM School for Cardiovascular Diseases, Maastricht University, Maastricht, Netherlands
| | - Patrick Schönleitner
- Department of Physiology, CARIM School for Cardiovascular Diseases, Maastricht University, Maastricht, Netherlands
| | | | - Gudrun Antoons
- Department of Physiology, CARIM School for Cardiovascular Diseases, Maastricht University, Maastricht, Netherlands
| | - Jordi Heijman
- Department of Cardiology, CARIM School for Cardiovascular Diseases, Maastricht University, Maastricht, Netherlands
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5
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Manninger M, Zweiker D, van Hunnik A, Alogna A, Prassl AJ, Schipke J, Zeemering S, Zirngast B, Schönleitner P, Schwarzl M, Herbst V, Thon-Gutschi E, Huber S, Rohrer U, Ebner J, Brussee H, Pieske BM, Heinzel FR, Verheule S, Antoons G, Lueger A, Mühlfeld C, Plank G, Schotten U, Post H, Scherr D. Arterial hypertension drives arrhythmia progression via specific structural remodeling in a porcine model of atrial fibrillation. Heart Rhythm 2018; 15:1328-1336. [PMID: 29803020 DOI: 10.1016/j.hrthm.2018.05.016] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/23/2018] [Indexed: 11/28/2022]
Abstract
BACKGROUND Arterial hypertension (HT) contributes to progression of atrial fibrillation (AF) via unknown mechanisms. OBJECTIVE We aimed to characterize electrical and structural changes accounting for increased AF stability in a large animal model of rapid atrial pacing (RAP)-induced AF combined with desoxycorticosterone acetate (DOCA)-induced HT. METHODS Eighteen pigs were instrumented with right atrial endocardial pacemaker leads and custom-made pacemakers to induce AF by continuous RAP (600 beats/min). DOCA pellets were subcutaneously implanted in a subgroup of 9 animals (AF+HT group); the other 9 animals served as controls (AF group). Final experiments included electrophysiology studies, endocardial electroanatomic mapping, and high-density mapping with epicardial multielectrode arrays. In addition, 3-dimensional computational modeling was performed. RESULTS DOCA implantation led to secondary HT (median [interquartile range] aortic pressure 109.9 [100-137] mm Hg in AF+HT vs 82.2 [79-96] mm Hg in AF; P < .05), increased AF stability (55.6% vs 12.5% of animals with AF episodes lasting >1 hour; P < .05), concentric left ventricular hypertrophy, atrial dilatation (119 ± 31 cm2 in AF+HT vs 78 ± 23 cm2 in AF; P < .05), and fibrosis. Collagen accumulation in the AF+HT group was mainly found in non-intermyocyte areas (1.62 ± 0.38 cm3 in AF+HT vs 0.96 ± 0.3 cm3 in AF; P < .05). Left and right atrial effective refractory periods, action potential durations, endo- and epicardial conduction velocities, and measures of AF complexity were comparable between the 2 groups. A 3-dimensional computational model confirmed an increase in AF stability observed in the in vivo experiments associated with increased atrial size. CONCLUSION In this model of secondary HT, higher AF stability after 2 weeks of RAP is mainly driven by atrial dilatation.
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Affiliation(s)
- Martin Manninger
- Division of Cardiology, Department of Medicine, Medical University of Graz, Graz, Austria.
| | - David Zweiker
- Division of Cardiology, Department of Medicine, Medical University of Graz, Graz, Austria
| | - Arne van Hunnik
- Department of Physiology, Cardiovascular Research Institute Maastricht, University of Maastricht, Maastricht, The Netherlands
| | - Alessio Alogna
- Department of Cardiology, Charité University Medicine, Campus Virchow-Klinikum, Berlin, Germany; Berlin Institute of Health (BIH), Berlin, Germany
| | - Anton J Prassl
- Institute of Biophysics, Medical University of Graz, Graz, Austria
| | - Julia Schipke
- Institute of Functional and Applied Anatomy, Hannover Medical School, Hannover, Germany
| | - Stef Zeemering
- Department of Physiology, Cardiovascular Research Institute Maastricht, University of Maastricht, Maastricht, The Netherlands
| | - Birgit Zirngast
- Department of Cardiothoracic Surgery, Medical University of Graz, Graz, Austria
| | - Patrick Schönleitner
- Department of Physiology, Cardiovascular Research Institute Maastricht, University of Maastricht, Maastricht, The Netherlands
| | - Michael Schwarzl
- Department of General and Interventional Cardiology, University Heart Center Hamburg-Eppendorf, Hamburg, Germany; DZHK (German Centre for Cardiovascular Research), Partner site Hamburg/Kiel/Lübeck, Berlin, Germany
| | - Viktoria Herbst
- Division of Cardiology, Department of Medicine, Medical University of Graz, Graz, Austria
| | - Eva Thon-Gutschi
- Division of Cardiology, Department of Medicine, Medical University of Graz, Graz, Austria
| | - Stefan Huber
- Department of Cardiothoracic Surgery, Medical University of Graz, Graz, Austria
| | - Ursula Rohrer
- Division of Cardiology, Department of Medicine, Medical University of Graz, Graz, Austria
| | - Jakob Ebner
- Division of Cardiology, Department of Medicine, Medical University of Graz, Graz, Austria
| | - Helmut Brussee
- Division of Cardiology, Department of Medicine, Medical University of Graz, Graz, Austria
| | - Burkert M Pieske
- Department of Physiology, Cardiovascular Research Institute Maastricht, University of Maastricht, Maastricht, The Netherlands
| | - Frank R Heinzel
- Department of Physiology, Cardiovascular Research Institute Maastricht, University of Maastricht, Maastricht, The Netherlands
| | - Sander Verheule
- Department of Physiology, Cardiovascular Research Institute Maastricht, University of Maastricht, Maastricht, The Netherlands
| | - Gudrun Antoons
- Department of Physiology, Cardiovascular Research Institute Maastricht, University of Maastricht, Maastricht, The Netherlands
| | - Andreas Lueger
- Division of Cardiology, Department of Medicine, Medical University of Graz, Graz, Austria
| | - Christian Mühlfeld
- Institute of Functional and Applied Anatomy, Hannover Medical School, Hannover, Germany
| | - Gernot Plank
- Institute of Biophysics, Medical University of Graz, Graz, Austria
| | - Ulrich Schotten
- Department of Physiology, Cardiovascular Research Institute Maastricht, University of Maastricht, Maastricht, The Netherlands
| | - Heiner Post
- Department of Cardiology, Charité University Medicine, Campus Virchow-Klinikum, Berlin, Germany; Department of Cardiology, Contilia Heart and Vessel Centre, St. Marien-Hospital Mülheim, Mülheim, Germany
| | - Daniel Scherr
- Division of Cardiology, Department of Medicine, Medical University of Graz, Graz, Austria; Department of Cardiology, Cardiovascular Research Institute Maastricht, Maastricht University Medical Center, Maastricht, The Netherlands
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6
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Opacic D, Ilic N, Sladojevic M, Schönleitner P, Markovic D, Kostic D, Davidovic L. Effects of atmospheric pressure dynamics on abdominal aortic aneurysm rupture onset. VASA 2018; 47:137-142. [PMID: 29299980 DOI: 10.1024/0301-1526/a000681] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
BACKGROUND The effect of atmospheric pressure (AP) on the onset of abdominal aorta aneurysm rupture (RAAA) remains an unanswered question. We have investigated the seasonal variation and the effect of AP dynamics on RAAA by analysing the largest series of intraoperatively confirmed RAAA. PATIENTS AND METHODS To realize this study we have performed a retrospective analysis of 546 patients with RAAA, operated within 503 days at the Clinic for vascular and endovascular surgery CCS between 1.1.2003 and 31.12.2012. AP data for Belgrade city were obtained from meteorological yearbooks published by the Republic Hydrometeorological Service of Serbia measured at the hydrometeorological station "Belgrade Observatory". Only patients with a residence within the extended Belgrade region, exposed to the similar AP values, were included in the analysis of the AP effect on RAAA. RESULTS RAAA were observed more frequently during winter and autumn months but without significant difference in comparison to other seasons. Months with higher AP values were associated with a higher RAAA rate (p = 0.0008, R2 = 0.665). A similar trend was observed for the monthly AP variability (p = 0.0311, R2 = 0.374). Average AP values did not differ between days with and without RAAA. However, during the three and seven days periods preceding RAAA AP variability parameters were greater and AP was rising. CONCLUSIONS Although these pressure differences are very small, higher AP values over longer periods of time as well as greater variability are associated with RAAA. The exact mechanism behind this association remains unclear. The postulation that low AP may precipitate RAAA based on the Laplace law should be discarded.
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Affiliation(s)
- Dragan Opacic
- 1 Herz- und Diabeteszentrum Nordrhein-Westfalen, Bad Oeynhausen, Germany
| | - Nikola Ilic
- 2 Faculty of Medicine, University of Belgrade, Belgrade, Serbia.,3 Clinic for Vascular and Endovascular Surgery, Clinical Center of Serbia, Belgrade, Serbia
| | - Milos Sladojevic
- 3 Clinic for Vascular and Endovascular Surgery, Clinical Center of Serbia, Belgrade, Serbia
| | | | - Dragan Markovic
- 2 Faculty of Medicine, University of Belgrade, Belgrade, Serbia.,3 Clinic for Vascular and Endovascular Surgery, Clinical Center of Serbia, Belgrade, Serbia
| | - Dusan Kostic
- 2 Faculty of Medicine, University of Belgrade, Belgrade, Serbia.,3 Clinic for Vascular and Endovascular Surgery, Clinical Center of Serbia, Belgrade, Serbia
| | - Lazar Davidovic
- 2 Faculty of Medicine, University of Belgrade, Belgrade, Serbia.,3 Clinic for Vascular and Endovascular Surgery, Clinical Center of Serbia, Belgrade, Serbia
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7
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Garcia-Canadilla P, Rodriguez JF, Palazzi MJ, Gonzalez-Tendero A, Schönleitner P, Balicevic V, Loncaric S, Luiken JJFP, Ceresa M, Camara O, Antoons G, Crispi F, Gratacos E, Bijnens B. A two dimensional electromechanical model of a cardiomyocyte to assess intra-cellular regional mechanical heterogeneities. PLoS One 2017; 12:e0182915. [PMID: 28837585 PMCID: PMC5570434 DOI: 10.1371/journal.pone.0182915] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2017] [Accepted: 07/26/2017] [Indexed: 01/01/2023] Open
Abstract
Experimental studies on isolated cardiomyocytes from different animal species and human hearts have demonstrated that there are regional differences in the Ca2+ release, Ca2+ decay and sarcomere deformation. Local deformation heterogeneities can occur due to a combination of factors: regional/local differences in Ca2+ release and/or re-uptake, intra-cellular material properties, sarcomere proteins and distribution of the intracellular organelles. To investigate the possible causes of these heterogeneities, we developed a two-dimensional finite-element electromechanical model of a cardiomyocyte that takes into account the experimentally measured local deformation and cytosolic [Ca2+] to locally define the different variables of the constitutive equations describing the electro/mechanical behaviour of the cell. Then, the model was individualised to three different rat cardiac cells. The local [Ca2+] transients were used to define the [Ca2+]-dependent activation functions. The cell-specific local Young's moduli were estimated by solving an inverse problem, minimizing the error between the measured and simulated local deformations along the longitudinal axis of the cell. We found that heterogeneities in the deformation during contraction were determined mainly by the local elasticity rather than the local amount of Ca2+, while in the relaxation phase deformation was mainly influenced by Ca2+ re-uptake. Our electromechanical model was able to successfully estimate the local elasticity along the longitudinal direction in three different cells. In conclusion, our proposed model seems to be a good approximation to assess the heterogeneous intracellular mechanical properties to help in the understanding of the underlying mechanisms of cardiomyocyte dysfunction.
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Affiliation(s)
| | - Jose F. Rodriguez
- LaBS, Chemistry, materials and chemical engineering department “Giulio Natta”, Politecnico di Milano, Milano, Italy
| | - Maria J. Palazzi
- Dept. of Information and Communication Technologies, Universitat Pompeu Fabra, Barcelona, Spain
| | - Anna Gonzalez-Tendero
- BCNatal - Barcelona Center for Maternal-Fetal and Neonatal Medicine (Hospital Clínic and Hospital Sant Joan de Deu), Fetal i+D Fetal Medicine Research Center, IDIBAPS, University of Barcelona, Barcelona, Spain
| | | | - Vedrana Balicevic
- Faculty of Electrical Engineering and Computing, University of Zagreb, Zagreb, Croatia
| | - Sven Loncaric
- Molecular Genetics, Maastricht University, Maastricht, The Netherlands
| | | | - Mario Ceresa
- Dept. of Information and Communication Technologies, Universitat Pompeu Fabra, Barcelona, Spain
| | - Oscar Camara
- Dept. of Information and Communication Technologies, Universitat Pompeu Fabra, Barcelona, Spain
| | - Gudrun Antoons
- Dept. of Physiology, Maastricht University, Maastricht, The Netherlands
| | - Fatima Crispi
- BCNatal - Barcelona Center for Maternal-Fetal and Neonatal Medicine (Hospital Clínic and Hospital Sant Joan de Deu), Fetal i+D Fetal Medicine Research Center, IDIBAPS, University of Barcelona, Barcelona, Spain
- Centre for Biomedical Research on Rare Diseases (CIBER-ER), Madrid, Spain
| | - Eduard Gratacos
- BCNatal - Barcelona Center for Maternal-Fetal and Neonatal Medicine (Hospital Clínic and Hospital Sant Joan de Deu), Fetal i+D Fetal Medicine Research Center, IDIBAPS, University of Barcelona, Barcelona, Spain
- Centre for Biomedical Research on Rare Diseases (CIBER-ER), Madrid, Spain
| | - Bart Bijnens
- Dept. of Information and Communication Technologies, Universitat Pompeu Fabra, Barcelona, Spain
- Institució Catalana de Recerca i Estudis Avançats (ICREA), Barcelona, Spain
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8
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Abstract
In cardiac myocytes, calcium (Ca2+) signalling is tightly controlled in dedicated microdomains. At the dyad, i.e. the narrow cleft between t-tubules and junctional sarcoplasmic reticulum (SR), many signalling pathways combine to control Ca2+-induced Ca2+ release during contraction. Local Ca2+ gradients also exist in regions where SR and mitochondria are in close contact to regulate energetic demands. Loss of microdomain structures, or dysregulation of local Ca2+ fluxes in cardiac disease, is often associated with oxidative stress, contractile dysfunction and arrhythmias. Ca2+ signalling at these microdomains is highly mechanosensitive. Recent work has demonstrated that increasing mechanical load triggers rapid local Ca2+ releases that are not reflected by changes in global Ca2+. Key mechanisms involve rapid mechanotransduction with reactive oxygen species or nitric oxide as primary signalling molecules targeting SR or mitochondria microdomains depending on the nature of the mechanical stimulus. This review summarizes the most recent insights in rapid Ca2+ microdomain mechanosensitivity and re-evaluates its (patho)physiological significance in the context of historical data on the macroscopic role of Ca2+ in acute force adaptation and mechanically-induced arrhythmias. We distinguish between preload and afterload mediated effects on local Ca2+ release, and highlight differences between atrial and ventricular myocytes. Finally, we provide an outlook for further investigation in chronic models of abnormal mechanics (eg post-myocardial infarction, atrial fibrillation), to identify the clinical significance of disturbed Ca2+ mechanosensitivity for arrhythmogenesis.
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Affiliation(s)
- Patrick Schönleitner
- Dept of Physiology, Cardiovascular Research Institute Maastricht, Maastricht University, The Netherlands
| | - Uli Schotten
- Dept of Physiology, Cardiovascular Research Institute Maastricht, Maastricht University, The Netherlands
| | - Gudrun Antoons
- Dept of Physiology, Cardiovascular Research Institute Maastricht, Maastricht University, The Netherlands.
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Liu Y, Steinbusch LKM, Nabben M, Kapsokalyvas D, van Zandvoort M, Schönleitner P, Antoons G, Simons PJ, Coumans WA, Geomini A, Chanda D, Glatz JFC, Neumann D, Luiken JJFP. Palmitate-Induced Vacuolar-Type H +-ATPase Inhibition Feeds Forward Into Insulin Resistance and Contractile Dysfunction. Diabetes 2017; 66:1521-1534. [PMID: 28302654 DOI: 10.2337/db16-0727] [Citation(s) in RCA: 37] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/10/2016] [Accepted: 03/13/2017] [Indexed: 11/13/2022]
Abstract
Dietary fat overconsumption leads to myocardial lipid accumulation through mechanisms that are incompletely resolved. Previously, we identified increased translocation of the fatty acid transporter CD36 from its endosomal storage compartment to the sarcolemma as the primary mechanism of excessive myocellular lipid import. Here, we show that increased CD36 translocation is caused by alkalinization of endosomes resulting from inhibition of proton pumping activity of vacuolar-type H+-ATPase (v-ATPase). Endosomal alkalinization was observed in hearts from rats fed a lard-based high-fat diet and in rodent and human cardiomyocytes upon palmitate overexposure, and appeared as an early lipid-induced event preceding the onset of insulin resistance. Either genetic or pharmacological inhibition of v-ATPase in cardiomyocytes exposed to low palmitate concentrations reduced insulin sensitivity and cardiomyocyte contractility, which was rescued by CD36 silencing. The mechanism of palmitate-induced v-ATPase inhibition involved its dissociation into two parts: the cytosolic V1 and the integral membrane V0 subcomplex. Interestingly, oleate also inhibits v-ATPase function, yielding triacylglycerol accumulation but not insulin resistance. In conclusion, lipid oversupply increases CD36-mediated lipid uptake that directly impairs v-ATPase function. This feeds forward to enhanced CD36 translocation and further increased lipid uptake. In the case of palmitate, its accelerated uptake ultimately precipitates into cardiac insulin resistance and contractile dysfunction.
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Affiliation(s)
- Yilin Liu
- Department of Molecular Genetics, CARIM School for Cardiovascular Diseases, Maastricht University, Maastricht, the Netherlands
| | - Laura K M Steinbusch
- Department of Molecular Genetics, CARIM School for Cardiovascular Diseases, Maastricht University, Maastricht, the Netherlands
| | - Miranda Nabben
- Department of Molecular Genetics, CARIM School for Cardiovascular Diseases, Maastricht University, Maastricht, the Netherlands
| | - Dimitris Kapsokalyvas
- Department of Molecular Cell Biology, CARIM School for Cardiovascular Diseases, Maastricht University, Maastricht, the Netherlands
| | - Marc van Zandvoort
- Department of Molecular Cell Biology, CARIM School for Cardiovascular Diseases, Maastricht University, Maastricht, the Netherlands
| | - Patrick Schönleitner
- Department of Physiology, CARIM School for Cardiovascular Diseases, Maastricht University, Maastricht, the Netherlands
| | - Gudrun Antoons
- Department of Physiology, CARIM School for Cardiovascular Diseases, Maastricht University, Maastricht, the Netherlands
| | | | - Will A Coumans
- Department of Molecular Genetics, CARIM School for Cardiovascular Diseases, Maastricht University, Maastricht, the Netherlands
| | - Amber Geomini
- Department of Molecular Genetics, CARIM School for Cardiovascular Diseases, Maastricht University, Maastricht, the Netherlands
| | - Dipanjan Chanda
- Department of Molecular Genetics, CARIM School for Cardiovascular Diseases, Maastricht University, Maastricht, the Netherlands
| | - Jan F C Glatz
- Department of Molecular Genetics, CARIM School for Cardiovascular Diseases, Maastricht University, Maastricht, the Netherlands
| | - Dietbert Neumann
- Department of Molecular Genetics, CARIM School for Cardiovascular Diseases, Maastricht University, Maastricht, the Netherlands
| | - Joost J F P Luiken
- Department of Molecular Genetics, CARIM School for Cardiovascular Diseases, Maastricht University, Maastricht, the Netherlands
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10
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Manninger M, Zweiker D, Van Hunnik A, Alogna A, Schönleitner P, Schwarzl M, Zeemering S, Herbst V, Thon-Gutschi E, Zirngast B, Huber S, Sereinigg M, Prenner G, Rohrer U, Ebner J, Pieske B, Brussee H, Schotten U, Antoons G, Heinzel F, Post H, Scherr D. 136-04: Increased AF stability in a porcine model of rapid atrial pacing and arterial hypertension: Structural and electrical remodelling. Europace 2016. [DOI: 10.1093/europace/18.suppl_1.i90] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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11
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Primessnig U, Schönleitner P, Höll A, Pfeiffer S, Bracic T, Rau T, Kapl M, Stojakovic T, Glasnov T, Leineweber K, Wakula P, Antoons G, Pieske B, Heinzel FR. Novel pathomechanisms of cardiomyocyte dysfunction in a model of heart failure with preserved ejection fraction. Eur J Heart Fail 2016; 18:987-97. [DOI: 10.1002/ejhf.524] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/09/2016] [Accepted: 02/16/2016] [Indexed: 12/24/2022] Open
Affiliation(s)
- Uwe Primessnig
- Department of Cardiology; Charité University Medicine Berlin; Campus Virchow-Klinikum Berlin Germany
- Department of Cardiology; Medical University of Graz; Graz Austria
- German Centre for Cardiovascular Research (DZHK); partner site Berlin, Germany
| | - Patrick Schönleitner
- Department of Cardiology; Medical University of Graz; Graz Austria
- Department of Physiology; Maastricht University; Maastricht The Netherlands
| | - Alexander Höll
- Department of Cardiology; Medical University of Graz; Graz Austria
| | - Susanne Pfeiffer
- Department of Cardiology; Medical University of Graz; Graz Austria
| | - Taja Bracic
- Department of Cardiology; Medical University of Graz; Graz Austria
| | - Thomas Rau
- Department of Cardiology; Medical University of Graz; Graz Austria
| | - Martin Kapl
- Department of Cardiology; Medical University of Graz; Graz Austria
| | - Tatjana Stojakovic
- Clinical Institute of Medical and Chemical Laboratory Diagnostics; Medical University of Graz; Graz Austria
| | - Toma Glasnov
- Institute of Chemistry; University of Graz; Graz Austria
| | | | - Paulina Wakula
- Department of Cardiology; Charité University Medicine Berlin; Campus Virchow-Klinikum Berlin Germany
- German Centre for Cardiovascular Research (DZHK); partner site Berlin, Germany
| | - Gudrun Antoons
- Department of Cardiology; Medical University of Graz; Graz Austria
- Department of Physiology; Maastricht University; Maastricht The Netherlands
| | - Burkert Pieske
- Department of Cardiology; Charité University Medicine Berlin; Campus Virchow-Klinikum Berlin Germany
- Department of Cardiology; Medical University of Graz; Graz Austria
- German Centre for Cardiovascular Research (DZHK); partner site Berlin, Germany
| | - Frank R. Heinzel
- Department of Cardiology; Charité University Medicine Berlin; Campus Virchow-Klinikum Berlin Germany
- Department of Cardiology; Medical University of Graz; Graz Austria
- German Centre for Cardiovascular Research (DZHK); partner site Berlin, Germany
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