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Elkatary RG, El Beltagy HM, Abdo VB, El Fatah DSA, El-Karef A, Ashour RH. Poly (ADP-ribose) polymerase pathway inhibitor (Olaparib) upregulates SERCA2a expression and attenuates doxorubicin-induced cardiomyopathy in mice. Environ Toxicol Pharmacol 2023; 103:104261. [PMID: 37689219 DOI: 10.1016/j.etap.2023.104261] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/10/2023] [Revised: 08/19/2023] [Accepted: 09/06/2023] [Indexed: 09/11/2023]
Abstract
The cardiotoxicity induced by doxorubicin is dose-dependent. The present study tested the potential cardioprotective effect of Poly ADP Ribose Polymerase (PARP) pathway inhibitor "olaparib" in a mouse model of doxorubicin-induced cardiomyopathy (DOX-CM). Seventy-two male BALB/c mice were randomized into six equal groups; control, DOX-CM, dexrazoxane-treated, and three olaparib-treated groups (5, 10, and 50 mg/kg/day). Cardiomyopathy was assessed by heart weight/Tibial length (HW/TL) ratio, cardiac fibrosis, oxidative stress, and electron microscope. Myocardial expression of SERCA2a mRNA and cleaved PARP-1 protein were also assessed. Similar to dexrazoxane, olaparib (10 mg/kg/day) significantly ameliorated oxidative stress, and preserved cardiac structure. It also suppressed myocardial PARP-1 protein expression and boosted SERCA2a mRNA expression. Olaparib (5 or 50 mg/kg/day) failed to show comparable effects. The current study detected the cardioprotective effect of olaparib at a dosage of 10 mg/kg/day. Also, the present study discovered a new cardioprotective mechanism of dexrazoxane by targeting PARP-1 in the heart.
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Affiliation(s)
- Rania Gamal Elkatary
- Clinical Pharmacology Department, Faculty of Medicine, Mansoura University, Mansoura 35516, Egypt
| | | | - Vivian Boshra Abdo
- Clinical Pharmacology Department, Faculty of Medicine, Mansoura University, Mansoura 35516, Egypt
| | - Dina Sabry Abd El Fatah
- Medical Biochemistry and Molecular Biology Department, Faculty of Medicine, Cairo University, Egypt
| | - Amr El-Karef
- Pathology Department, Faculty of Medicine, Mansoura University, Mansoura 35516, Egypt; Horus University-Egypt, New Damietta, Egypt
| | - Rehab Hamdy Ashour
- Clinical Pharmacology Department, Faculty of Medicine, Mansoura University, Mansoura 35516, Egypt.
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2
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Aguayo-Ortiz R, Creech J, Jiménez-Vázquez EN, Guerrero-Serna G, Wang N, da Rocha AM, Herron TJ, Espinoza-Fonseca LM. A multiscale approach for bridging the gap between potency, efficacy, and safety of small molecules directed at membrane proteins. Sci Rep 2021; 11:16580. [PMID: 34400719 PMCID: PMC8368179 DOI: 10.1038/s41598-021-96217-7] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2021] [Accepted: 08/06/2021] [Indexed: 01/17/2023] Open
Abstract
Membrane proteins constitute a substantial fraction of the human proteome, thus representing a vast source of therapeutic drug targets. Indeed, newly devised technologies now allow targeting "undruggable" regions of membrane proteins to modulate protein function in the cell. Despite the advances in technology, the rapid translation of basic science discoveries into potential drug candidates targeting transmembrane protein domains remains challenging. We address this issue by harmonizing single molecule-based and ensemble-based atomistic simulations of ligand-membrane interactions with patient-derived induced pluripotent stem cell (iPSC)-based experiments to gain insights into drug delivery, cellular efficacy, and safety of molecules directed at membrane proteins. In this study, we interrogated the pharmacological activation of the cardiac Ca2+ pump (Sarcoplasmic reticulum Ca2+-ATPase, SERCA2a) in human iPSC-derived cardiac cells as a proof-of-concept model. The combined computational-experimental approach serves as a platform to explain the differences in the cell-based activity of candidates with similar functional profiles, thus streamlining the identification of drug-like candidates that directly target SERCA2a activation in human cardiac cells. Systematic cell-based studies further showed that a direct SERCA2a activator does not induce cardiotoxic pro-arrhythmogenic events in human cardiac cells, demonstrating that pharmacological stimulation of SERCA2a activity is a safe therapeutic approach targeting the heart. Overall, this novel multiscale platform encompasses organ-specific drug potency, efficacy, and safety, and opens new avenues to accelerate the bench-to-patient research aimed at designing effective therapies directed at membrane protein domains.
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Affiliation(s)
- Rodrigo Aguayo-Ortiz
- Division of Cardiovascular Medicine, Department of Internal Medicine, Center for Arrhythmia Research, University of Michigan, Ann Arbor, MI, 48109, USA
- Departamento de Farmacia, Facultad de Química, Universidad Nacional Autónoma de México, 04510, Mexico, Mexico
| | - Jeffery Creech
- Division of Cardiovascular Medicine, Department of Internal Medicine, Center for Arrhythmia Research, University of Michigan, Ann Arbor, MI, 48109, USA
- Frankel Cardiovascular Regeneration Core Laboratory, University of Michigan, Ann Arbor, MI, 48109, USA
| | - Eric N Jiménez-Vázquez
- Division of Cardiovascular Medicine, Department of Internal Medicine, Center for Arrhythmia Research, University of Michigan, Ann Arbor, MI, 48109, USA
- Department of Pharmacology, University of Michigan, Ann Arbor, MI, 48109, USA
| | - Guadalupe Guerrero-Serna
- Division of Cardiovascular Medicine, Department of Internal Medicine, Center for Arrhythmia Research, University of Michigan, Ann Arbor, MI, 48109, USA
| | - Nulang Wang
- Division of Cardiovascular Medicine, Department of Internal Medicine, Center for Arrhythmia Research, University of Michigan, Ann Arbor, MI, 48109, USA
| | - Andre Monteiro da Rocha
- Division of Cardiovascular Medicine, Department of Internal Medicine, Center for Arrhythmia Research, University of Michigan, Ann Arbor, MI, 48109, USA
- Frankel Cardiovascular Regeneration Core Laboratory, University of Michigan, Ann Arbor, MI, 48109, USA
| | - Todd J Herron
- Division of Cardiovascular Medicine, Department of Internal Medicine, Center for Arrhythmia Research, University of Michigan, Ann Arbor, MI, 48109, USA
- Frankel Cardiovascular Regeneration Core Laboratory, University of Michigan, Ann Arbor, MI, 48109, USA
- CARTOX, Inc., 56655 Grand River Ave., PO Box 304, New Hudson, MI, 48165, USA
| | - L Michel Espinoza-Fonseca
- Division of Cardiovascular Medicine, Department of Internal Medicine, Center for Arrhythmia Research, University of Michigan, Ann Arbor, MI, 48109, USA.
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Montigny C, Dieudonné T, Orlowski S, Vázquez-Ibar JL, Gauron C, Georgin D, Lund S, le Maire M, Møller JV, Champeil P, Lenoir G. Slow Phospholipid Exchange between a Detergent-Solubilized Membrane Protein and Lipid-Detergent Mixed Micelles: Brominated Phospholipids as Tools to Follow Its Kinetics. PLoS One 2017; 12:e0170481. [PMID: 28118404 PMCID: PMC5261732 DOI: 10.1371/journal.pone.0170481] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2016] [Accepted: 01/05/2017] [Indexed: 12/02/2022] Open
Abstract
Membrane proteins are largely dependent for their function on the phospholipids present in their immediate environment, and when they are solubilized by detergent for further study, residual phospholipids are critical, too. Here, brominated phosphatidylcholine, a phospholipid which behaves as an unsaturated phosphatidylcholine, was used to reveal the kinetics of phospholipid exchange or transfer from detergent mixed micelles to the environment of a detergent-solubilized membrane protein, the paradigmatic P-type ATPase SERCA1a, in which Trp residues can experience fluorescence quenching by bromine atoms present on phospholipid alkyl chains in their immediate environment. Using dodecylmaltoside as the detergent, exchange of (brominated) phospholipid was found to be much slower than exchange of detergent under the same conditions, and also much slower than membrane solubilization, the latter being evidenced by light scattering changes. The kinetics of this exchange was strongly dependent on temperature. It was also dependent on the total concentration of the mixed micelles, revealing the major role for such exchange of the collision of detergent micelles with the detergent-solubilized protein. Back-transfer of the brominated phospholipid from the solubilized protein to the detergent micelle was much faster if lipid-free DDM micelles instead of mixed micelles were added for triggering dissociation of brominated phosphatidylcholine from the solubilized protein, or in the additional presence of C12E8 detergent during exchange, also emphasizing the role of the chemical nature of the micelle/protein interface. This protocol using brominated lipids appears to be valuable for revealing the possibly slow kinetics of phospholipid transfer to or from detergent-solubilized membrane proteins. Independently, continuous recording of the activity of the protein can also be used in some cases to correlate changes in activity with the exchange of a specific phospholipid, as shown here by using the Drs2p/Cdc50p complex, a lipid flippase with specific binding sites for lipids.
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Affiliation(s)
- Cédric Montigny
- Institute for Integrative Biology of the Cell (I2BC), CEA, CNRS, Université Paris-Sud, Université Paris-Saclay, Gif-sur-Yvette, France
- * E-mail: (CM); (GL)
| | - Thibaud Dieudonné
- Institute for Integrative Biology of the Cell (I2BC), CEA, CNRS, Université Paris-Sud, Université Paris-Saclay, Gif-sur-Yvette, France
| | - Stéphane Orlowski
- Institute for Integrative Biology of the Cell (I2BC), CEA, CNRS, Université Paris-Sud, Université Paris-Saclay, Gif-sur-Yvette, France
| | - José Luis Vázquez-Ibar
- Institute for Integrative Biology of the Cell (I2BC), CEA, CNRS, Université Paris-Sud, Université Paris-Saclay, Gif-sur-Yvette, France
| | - Carole Gauron
- Institute for Integrative Biology of the Cell (I2BC), CEA, CNRS, Université Paris-Sud, Université Paris-Saclay, Gif-sur-Yvette, France
| | - Dominique Georgin
- CEA, iBiTec-S, Service de Chimie Bioorganique et de Marquage, Gif-sur-Yvette, France
| | - Sten Lund
- Medical Research Laboratory, Department of Endocrinology and Internal Medicine, Aarhus University Hospital, Aarhus, Denmark
| | - Marc le Maire
- Institute for Integrative Biology of the Cell (I2BC), CEA, CNRS, Université Paris-Sud, Université Paris-Saclay, Gif-sur-Yvette, France
| | - Jesper V. Møller
- Centre for Membrane Pumps in Cells and Disease—PUMPKIN, Danish National Research Foundation, Aarhus University, Aarhus, Denmark; Department of Biomedicine, Aarhus University, Aarhus, Denmark
| | - Philippe Champeil
- Institute for Integrative Biology of the Cell (I2BC), CEA, CNRS, Université Paris-Sud, Université Paris-Saclay, Gif-sur-Yvette, France
| | - Guillaume Lenoir
- Institute for Integrative Biology of the Cell (I2BC), CEA, CNRS, Université Paris-Sud, Université Paris-Saclay, Gif-sur-Yvette, France
- * E-mail: (CM); (GL)
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Campanha FVG, Perone D, de Campos DHS, Luvizotto RDAM, De Síbio MT, de Oliveira M, Olimpio RMC, Moretto FCF, Padovani CR, Mazeto GMFS, Cicogna AC, Nogueira CR. Thyroxine increases Serca2 and Ryr2 gene expression in heart failure rats with euthyroid sick syndrome. Arch Endocrinol Metab 2016; 60:582-586. [PMID: 27737323 PMCID: PMC10522172 DOI: 10.1590/2359-3997000000208] [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] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/17/2015] [Accepted: 04/11/2016] [Indexed: 11/22/2022]
Abstract
OBJECTIVE The current study was aimed at analyzing sarcoplasmic reticulum Ca2+ ATPase (Serca2) and ryanodine receptor type 2 (Ryr2) gene expression in rats subjected to surgery that induced HF and were subsequently treated with T4 using physiological doses. MATERIALS AND METHODS HF was induced in 18 male Wistar rats by clipping the ascending thoracic aorta to generate aortic stenosis (HFS group), while the control group (9-sham) underwent thoracotomy. After 21 weeks, the HFS group was subdivided into two subgroups. One group (9 Wistar rats) with HF received 1.0 µg of T4/100 g of body weight for five consecutive days (HFS/T4); the other group (9 Wistar rats) received isotonic saline solution (HFS/S). The animals were sacrificed after this treatment and examined for signs of HF. Samples from the left ventricles of these animals were analyzed by RT-qPCR for the expression of Serca2 and Ryr2 genes. RESULTS Rats with HF developed euthyroid sick syndrome (ESS) and treatment with T4 restored the T3 values to the Sham level and increased Serca2 and Ryr2 gene expression, thereby demonstrating a possible benefit of T4 treatment for heart function in ESS associated with HF. CONCLUSION The T4 treatment can potentially normalize the levels of T3 as well elevated Serca2 and Ryr2 gene expression in the myocardium in heart failure rats with euthyroid sick syndrome.
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Affiliation(s)
- Fábio V. G. Campanha
- Unidade de Pesquisa ExperimentalFaculdade de Medicina de BotucatuUniversidade Estadual PaulistaBotucatuSPBrasil Departamento de Clínica Médica, Unidade de Pesquisa Experimental (Unipex), Faculdade de Medicina de Botucatu, Universidade Estadual Paulista (Unesp), Botucatu, SP, Brasil
| | - Denise Perone
- Unidade de Pesquisa ExperimentalFaculdade de Medicina de BotucatuUniversidade Estadual PaulistaBotucatuSPBrasil Departamento de Clínica Médica, Unidade de Pesquisa Experimental (Unipex), Faculdade de Medicina de Botucatu, Universidade Estadual Paulista (Unesp), Botucatu, SP, Brasil
| | - Dijon H. S. de Campos
- Unidade de Pesquisa ExperimentalFaculdade de Medicina de BotucatuUniversidade Estadual PaulistaBotucatuSPBrasil Departamento de Clínica Médica, Unidade de Pesquisa Experimental (Unipex), Faculdade de Medicina de Botucatu, Universidade Estadual Paulista (Unesp), Botucatu, SP, Brasil
| | - Renata de A. M. Luvizotto
- Instituto de Ciências da SaúdeUniversidade Federal de Mato GrossoSinopMTBrasilInstituto de Ciências da Saúde, Universidade Federal de Mato Grosso (UFMT), Sinop, MT, Brasil
| | - Maria T. De Síbio
- Unidade de Pesquisa ExperimentalFaculdade de Medicina de BotucatuUniversidade Estadual PaulistaBotucatuSPBrasil Departamento de Clínica Médica, Unidade de Pesquisa Experimental (Unipex), Faculdade de Medicina de Botucatu, Universidade Estadual Paulista (Unesp), Botucatu, SP, Brasil
| | - Miriane de Oliveira
- Unidade de Pesquisa ExperimentalFaculdade de Medicina de BotucatuUniversidade Estadual PaulistaBotucatuSPBrasil Departamento de Clínica Médica, Unidade de Pesquisa Experimental (Unipex), Faculdade de Medicina de Botucatu, Universidade Estadual Paulista (Unesp), Botucatu, SP, Brasil
| | - Regiane M. C. Olimpio
- Unidade de Pesquisa ExperimentalFaculdade de Medicina de BotucatuUniversidade Estadual PaulistaBotucatuSPBrasil Departamento de Clínica Médica, Unidade de Pesquisa Experimental (Unipex), Faculdade de Medicina de Botucatu, Universidade Estadual Paulista (Unesp), Botucatu, SP, Brasil
| | - Fernanda C. F. Moretto
- Unidade de Pesquisa ExperimentalFaculdade de Medicina de BotucatuUniversidade Estadual PaulistaBotucatuSPBrasil Departamento de Clínica Médica, Unidade de Pesquisa Experimental (Unipex), Faculdade de Medicina de Botucatu, Universidade Estadual Paulista (Unesp), Botucatu, SP, Brasil
| | - Carlos R. Padovani
- Departamento de BioestatísticaInstituto de BiociênciasUniversidade Estadual PaulistaBotucatuSPBrasilDepartamento de Bioestatística, Instituto de Biociências, Universidade Estadual Paulista (Unesp), Botucatu, SP, Brasil
| | - Gláucia M. F. S. Mazeto
- Unidade de Pesquisa ExperimentalFaculdade de Medicina de BotucatuUniversidade Estadual PaulistaBotucatuSPBrasil Departamento de Clínica Médica, Unidade de Pesquisa Experimental (Unipex), Faculdade de Medicina de Botucatu, Universidade Estadual Paulista (Unesp), Botucatu, SP, Brasil
| | - Antonio C. Cicogna
- Unidade de Pesquisa ExperimentalFaculdade de Medicina de BotucatuUniversidade Estadual PaulistaBotucatuSPBrasil Departamento de Clínica Médica, Unidade de Pesquisa Experimental (Unipex), Faculdade de Medicina de Botucatu, Universidade Estadual Paulista (Unesp), Botucatu, SP, Brasil
| | - Célia R. Nogueira
- Unidade de Pesquisa ExperimentalFaculdade de Medicina de BotucatuUniversidade Estadual PaulistaBotucatuSPBrasil Departamento de Clínica Médica, Unidade de Pesquisa Experimental (Unipex), Faculdade de Medicina de Botucatu, Universidade Estadual Paulista (Unesp), Botucatu, SP, Brasil
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5
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Dineen SL, McKenney ML, Bell LN, Fullenkamp AM, Schultz KA, Alloosh M, Chalasani N, Sturek M. Metabolic Syndrome Abolishes Glucagon-Like Peptide 1 Receptor Agonist Stimulation of SERCA in Coronary Smooth Muscle. Diabetes 2015; 64:3321-7. [PMID: 25845661 PMCID: PMC4542436 DOI: 10.2337/db14-1790] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/21/2014] [Accepted: 03/29/2015] [Indexed: 12/21/2022]
Abstract
Metabolic syndrome (MetS) doubles the risk of adverse cardiovascular events. Glucagon-like peptide 1 (GLP-1) receptor agonists induce weight loss, increase insulin secretion, and improve glucose tolerance. Studies in healthy animals suggest cardioprotective properties of GLP-1 receptor agonists, perhaps partially mediated by improved sarco-endoplasmic reticulum Ca(2+) ATPase (SERCA) activity. We examined the acute effect of GLP-1 receptor agonists on coronary smooth muscle cells (CSM) enzymatically isolated from lean, healthy Ossabaw miniature swine. Intracellular Ca(2+) handling was interrogated with fura-2. The GLP-1 receptor agonist exenatide activated SERCA but did not alter other Ca(2+) transporters. Further, we tested the hypothesis that chronic, in vivo treatment with GLP-1 receptor agonist AC3174 would attenuate coronary artery disease (CAD) in swine with MetS. MetS was induced in 20 swine by 6 months' feeding of a hypercaloric, atherogenic diet. Swine were then randomized (n = 10/group) into placebo or AC3174 treatment groups and continued the diet for an additional 6 months. AC3174 treatment attenuated weight gain, increased insulin secretion, and improved glucose tolerance. Intravascular ultrasound and histology showed no effect of AC3174 on CAD. MetS abolished SERCA activation by GLP-1 receptor agonists. We conclude that MetS confers vascular resistance to GLP-1 receptor agonists, partially through impaired cellular signaling steps involving SERCA.
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Affiliation(s)
- Stacey L Dineen
- Department of Cellular & Integrative Physiology, Indiana University School of Medicine, Indianapolis, IN
| | - Mikaela L McKenney
- Department of Cellular & Integrative Physiology, Indiana University School of Medicine, Indianapolis, IN
| | - Lauren N Bell
- Department of Medicine, Indiana University School of Medicine, Indianapolis, IN
| | | | - Kyle A Schultz
- Department of Cellular & Integrative Physiology, Indiana University School of Medicine, Indianapolis, IN
| | - Mouhamad Alloosh
- Department of Cellular & Integrative Physiology, Indiana University School of Medicine, Indianapolis, IN
| | - Naga Chalasani
- Department of Cellular & Integrative Physiology, Indiana University School of Medicine, Indianapolis, IN Department of Medicine, Indiana University School of Medicine, Indianapolis, IN
| | - Michael Sturek
- Department of Cellular & Integrative Physiology, Indiana University School of Medicine, Indianapolis, IN
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Affiliation(s)
- Mark G Davies
- The University of Texas Health Science Center at San Antonio, San Antonio, TX
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7
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Bettero GM, Salles L, Rosário Figueira RM, Poser GV, Rates SMK, Noël F, Quintas LEM. In vitro effect of valepotriates isolated from Valeriana glechomifolia on rat P-type ATPases. Planta Med 2011; 77:1702-1706. [PMID: 21567360 DOI: 10.1055/s-0030-1271084] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Valepotriates are iridoids found in variable amounts in Valerianaceae and might be among the bioactive compounds which confer anxiolytic properties to the Valeriana species. On the other hand, unspecific cytotoxicity has also been described. Presently, however, no particular molecular target has been defined for these compounds. Here we studied the effect of valtrate, acevaltrate, and 1- β-acevaltrate isolated from Valeriana glechomifolia on the enzymatic activity of rat P-type ATPases. Valepotriates did not affect rat skeletal muscle sarco/endoplasmic reticulum Ca²⁺-ATPase (SERCA) activity at the highest concentration used (100 µM). In contrast, the same concentration inhibited roughly half of the total H⁺/K⁺-ATPase activity from rat gastric epithelium (valtrate 54.6 ± 3.2 %, acevaltrate 60.7 ± 7.3 %, 1- β-acevaltrate 50.2 ± 3.1 %; mean ± SEM, n = 3-5). Finally, these substances showed the highest inhibitory potency toward Na⁺/K⁺-ATPase, and the inhibition curves obtained provided a similar IC₅₀ (in µM) for rat kidney α1 isoform (valtrate 21.2, acevaltrate 22.8, 1- β-acevaltrate 24.4) and brain hemispheres α2/ α3 isoforms (valtrate 19.4, acevaltrate 42.3, 1- β-acevaltrate 38.3). Our results suggest that P-type ATPases are differentially inhibited by valepotriates and that Na⁺/K⁺-ATPase might be one of their molecular targets in vivo.
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Affiliation(s)
- Gustavo M Bettero
- Laboratório de Farmacologia Bioquímica e Molecular, Instituto de Ciências Biomédicas, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
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Hu ST, Tang Y, Shen YF, Ao HH, Bai J, Wang YL, Yang YJ. Protective effect of oxymatrine on chronic rat heart failure. J Physiol Sci 2011; 61:363-72. [PMID: 21691940 PMCID: PMC10717686 DOI: 10.1007/s12576-011-0154-y] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2011] [Accepted: 04/30/2011] [Indexed: 01/30/2023]
Abstract
Oxymatrine is one of the alkaloids extracted from the Chinese herb Sophora japonica (Sophora flavescens Ait.) with anti-inflammatory, immune reaction inhibiting, antiviral, and hepatocyte and antihepatic fibrosis protective activities. However, the effect of oxymatrine on heart failure is not yet known. In this study, the effect of oxymatrine on heart failure was investigated using a Sprague-Dawley rat model of chronic heart failure. Morphological findings showed that in the group treated with 50 and 100 mg/kg of oxymatrine; intermyofibrillar lysis disappeared, myofilaments were orderly, closely and evenly arranged; and mitochondria contained tightly packed cristae compared with the heart failure group. We investigated the cytosolic Ca(2+) transients and sarcoplasmic reticulum (SR) Ca(2+) content, and assessed the expression of ryanodine receptor (RyR2), SR-Ca(2+) ATPase (SERCA2a), and L-type Ca(2+) channel (dihydropyridine receptor, DHPR). We found that the cytosolic Ca(2+) transients were markedly increased in amplitude in the medium- (ΔF/F (0) = 26.22 ± 2.01) and high-dose groups (ΔF/F (0) = 29.49 ± 1.17) compared to the heart failure group (ΔF/F (0) = 12.12 ± 1.35, P < 0.01), with changes paralleled by a significant increase in the SR Ca(2+) content (medium-dose group: ΔF/F (0) = 32.20 ± 1.67, high-dose group: ΔF/F (0) = 32.57 ± 1.29, HF: ΔF/F (0) = 17.26 ± 1.05, P < 0.01). Moreover, we demonstrated that the expression of SERCA2a and cardiac DHPR was significantly increased in the medium- and high-dose group compared with the heart failure rats. These findings suggest that oxymatrine could improve heart failure by improving the cardiac function and that this amelioration is associated with upregulation of SERCA2a and DHPR.
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Affiliation(s)
- Shu-Ting Hu
- Department of Physiology, Basic Medical Science College, Ningxia Medical University, 1160 Shengli Road, Yinchuan, 750004 Ningxia People’s Republic of China
| | - Ying Tang
- Department of Biophysics, Second Military Medical University, 800 Xiangyin Road, Shanghai, 200433 People’s Republic of China
| | - Ya-Feng Shen
- Department of Biophysics, Second Military Medical University, 800 Xiangyin Road, Shanghai, 200433 People’s Republic of China
| | - Hai-Hang Ao
- Department of Emergency, Affiliated Hospital of Ningxia Medical University, 804 Shengli Road, Yinchuan, 750004 Ningxia People’s Republic of China
| | - Jie Bai
- Department of Physiology, Basic Medical Science College, Ningxia Medical University, 1160 Shengli Road, Yinchuan, 750004 Ningxia People’s Republic of China
| | - Yong-Liang Wang
- Department of Biophysics, Second Military Medical University, 800 Xiangyin Road, Shanghai, 200433 People’s Republic of China
| | - Yong-Ji Yang
- Department of Biophysics, Second Military Medical University, 800 Xiangyin Road, Shanghai, 200433 People’s Republic of China
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Liu F, Liu CT. [In vitro study on the mechanism of myocardial injury induced by Formoterol and the protective effect of Budesonide in rats]. Xi Bao Yu Fen Zi Mian Yi Xue Za Zhi 2011; 27:245-248. [PMID: 21419039] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
AIM To investigate the mechanism of myocardial injury induced by Formoterol (FORM) in vitro and the protective effect of Budesonide (BUD) against such cardiac damage in rats. METHODS FORM was added in the media of isolated rat myocardial tissues in a concentration gradients of 0 μmol/L, 0.01 μmol/L, 0.05 μmol/L, 0.1 μmol/L, 0.5 μmol/L, 1 μmol/L, 5 μmol/L, respectively, or combined with BUD in a concentration of 10 μmol/L, for 72 hours in vitro. The cardiac troponin I (cTnI) and heart-type fatty acid-binding protein (H-FABP) in supernatant were detected with ELISA method. The mRNA level of glycogen synthase kinase-3β (GSK-3β) was detected with RT-PCR. Sarco(endo) plasmic reticulum Ca(2+);-ATPase (SERCA2) and GSK-3β protein expression were detected with Western blot. RESULTS (1) The values of cTnI and H-FABP were significantly higher in FORM groups, compared with the control group(P<0.05), and there was a difference between different FORM concentration gradients (P<0.05) except 1 μmol/L and 5 μmol/L groups. In FORM and BUD combined groups, the values of cTnI and H-FABP were significantly lower than FORM groups(P<0.05). (2) With the increase of FORM concentration, there were lower expression of SERCA2 (P<0.05) and higher expression of GSK-3β protein (P<0.05). But there was no significant statistic difference of GSK-3β mRNA between FORM treated groups (P>0.05). CONCLUSION (1) FORM can induce injury in rat's isolated myocardial tissues and the injury is concentration depended. BUD shows protective effect against FORM induced myocardial injury. (2) The mechanism of FORM induced myocardial injury may be associated with the lower expression of SERCA2, which is mediated by GSK-3β.
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Affiliation(s)
- Fen Liu
- Organization for Drug Clinical Trial, Institute of Clinical Pharmacology, West China Hospital, Sichuan University, Chengdu 610041, China.
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Montigny C, Arnou B, Champeil P. Glycyl betaine is effective in slowing down the irreversible denaturation of a detergent-solubilized membrane protein, sarcoplasmic reticulum Ca2+-ATPase (SERCA1a). Biochem Biophys Res Commun 2009; 391:1067-9. [PMID: 20004176 DOI: 10.1016/j.bbrc.2009.12.021] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2009] [Accepted: 12/04/2009] [Indexed: 11/19/2022]
Abstract
Many membrane proteins become labile when they are solubilized by detergent. Here we show that the presence of high concentrations of glycyl betaine stabilizes one of these proteins, the sarcoplasmic reticulum Ca(2+)-ATPase (SERCA1a), solubilized with nonionic detergents like n-dodecyl beta-d-maltopyranoside (DDM) or octaethylene glycol monododecyl ether (C(12)E(8)) which are commonly used for its purification or crystallization. Betaine at high concentrations might become useful as a stabilizing agent for detergent-solubilized membrane proteins, for instance during purification procedures or during the long periods of time required for crystallogenesis.
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Affiliation(s)
- Cédric Montigny
- CNRS, URA 2096, Systèmes Membranaires, Photobiologie, Stress et Détoxication, F-91191 Gif-sur-Yvette, France
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11
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Teerlink JR, Metra M, Zacà V, Sabbah HN, Cotter G, Gheorghiade M, Cas LD. Agents with inotropic properties for the management of acute heart failure syndromes. Traditional agents and beyond. Heart Fail Rev 2009; 14:243-53. [PMID: 19876734 PMCID: PMC2772951 DOI: 10.1007/s10741-009-9153-y] [Citation(s) in RCA: 72] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/05/2022]
Abstract
Treatment with inotropic agents is one of the most controversial topics in heart failure. Initial enthusiasm, based on strong pathophysiological rationale and apparent empirical efficacy, has been progressively limited by results of controlled trials and registries showing poorer outcomes of the patients on inotropic therapy. The use of these agents remains, however, potentially indicated in a significant proportion of patients with low cardiac output, peripheral hypoperfusion and end-organ dysfunction caused by heart failure. Limitations of inotropic therapy seem to be mainly related to their mechanisms of action entailing arrhythmogenesis, peripheral vasodilation, myocardial ischemia and damage, and possibly due to their use in patients without a clear indication, rather than to the general principle of inotropic therapy itself. This review will discuss the characteristics of the patients with a potential indication for inotropic therapy, the main data from registries and controlled trials, the mechanism of the untoward effects of these agents on outcomes and, lastly, perspectives with new agents with novel mechanisms of action.
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Affiliation(s)
- John R. Teerlink
- Section of Cardiology, San Francisco Veterans Affairs Medical Center, University of California, San Francisco, San Francisco, CA USA
| | - Marco Metra
- Cardiology, Department of Experimental and Applied Medicine, University of Brescia, c/o Spedali Civili di Brescia, Piazza Spedali Civili 1, 25123 Brescia, Italy
| | - Valerio Zacà
- Division of Cardiology, Cardiovascular and Thoracic Department, Santa Maria alle Scotte Hospital, Siena, Italy
| | - Hani N. Sabbah
- Department of Medicine, Division of Cardiovascular Medicine, Henry Ford Heart & Vascular Institute, Detroit, MI USA
| | | | - Mihai Gheorghiade
- Feinberg School of Medicine, Northwestern University, Chicago, IL USA
| | - Livio Dei Cas
- Cardiology, Department of Experimental and Applied Medicine, University of Brescia, c/o Spedali Civili di Brescia, Piazza Spedali Civili 1, 25123 Brescia, Italy
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12
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Voss P, Engels M, Strosova M, Grune T, Horakova L. Protective effect of antioxidants against sarcoplasmic reticulum (SR) oxidation by Fenton reaction, however without prevention of Ca-pump activity. Toxicol In Vitro 2008; 22:1726-33. [PMID: 18692562 DOI: 10.1016/j.tiv.2008.07.010] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2008] [Revised: 04/18/2008] [Accepted: 07/16/2008] [Indexed: 01/09/2023]
Abstract
The Ca(2+)-ATPase of the sarcoplasmic reticulum (SERCA) of rabbit skeletal muscle was oxidized by Fe2+/H2O2/ascorbic acid (AA), a system which generates HO(.) radicals according to the Fenton reaction: (Fe2(+)+H2O2-->HO(.)+OH(-)+Fe(3+)) under conditions similar to the pathological state of inflammation. Under these conditions, when hydroxyl-radicals and/or ferryl-radicals are generated, a 50% decrease of the SERCA activity was observed, a significant decrease of SH groups and an increase of protein carbonyl groups and lipid peroxidation were identified. Two new bands, time dependent in density, appeared in the SERCA protein electrophoresis after incubation with the Fenton system (at approximately 50 and 75kDa), probably due to structural changes as supported also by trypsin digestion. Immunoblotting of DNPH derivatized protein bound carbonyls detected a time dependent increase after incubation of SERCA with the Fenton system. Trolox and the pyridoindole stobadine (50microM) protected SR against oxidation induced via the Fenton system by preventing SH group oxidation and lipid peroxidation. Pycnogenol((R)) and EGb761 (40microg/ml) protected SERCA in addition against protein bound carbonyl formation. In spite of the antioxidant effects, trolox and stobadine were not able to prevent a decrease in the SERCA Ca(2+)-ATPase activity. Pycnogenol and EGb761 even enhanced the decrease of the Ca(2+)-ATPase activity induced by the Fenton system, probably by secondary oxidative reactions.
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Affiliation(s)
- Peter Voss
- Research Institute for Environmental Medicine gGmbH at the Heinrich-Heine-University, Duesseldorf, Germany
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13
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He H, Shi M, Zeng X, Yang J, Li Y, Wu L, Li L. Cardioprotective effect of salvianolic acid B on large myocardial infarction mediated by reversing upregulation of leptin, endothelin pathways, and abnormal expression of SERCA2a, phospholamban in rats. J Ethnopharmacol 2008; 118:35-45. [PMID: 18439775 DOI: 10.1016/j.jep.2008.03.006] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/16/2007] [Revised: 03/03/2008] [Accepted: 03/06/2008] [Indexed: 05/26/2023]
Abstract
AIM To study the cardioprotective effect of salvianolic acid B (Sal B) on cardiac dysfunction. We hypothesized that hyperleptinemia may correlate with abnormal expression of sarco/endoplasmic reticulum ATPase 2a (SERCA2a), phospholamban (PLB) and endothelin-reactive oxygen species (ET-ROS) pathways in rats with large myocardial infarction (MI). METHODS Large MI was produced by coronary artery ligation for 4 weeks in rats. The rats were divided into four groups: sham, MI, MI+l-Sal B (50 mg/(kg d)), p.o. for 4 weeks), and MI+h-Sal B (100 mg/(kg d)), p.o. for 4 weeks). RESULTS In MI rats, hemodynamic and echocardiographic abnormalities, cardiac remodeling, and histological changes with features of cardiac failure were associated with hyperleptinemia accompanied by oxidative stress and upregulated OB-Rb, ET pathway mRNA expression and downregulated SERCA2a and PLB mRNA and protein expressions in the myocardium. CONCLUSIONS The studies demonstrated that an activated leptin pathway correlated with abnormal expression of SERCA2a, PLB and an activated ET-ROS system in the affected myocardium. Sal B exerts beneficial actions on cardiac function in rats with large MI, mainly suppressing upregulation of leptin and ET pathways and oxidative stress, and recovering the normal expressions of SERCA2a and PLB in myocardium.
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Affiliation(s)
- Haibo He
- Institute of Chinese Herbal Medicine, College of Pharmaceutical Sciences, Zijingang Campus, Zhejiang University, Hangzhou, China
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14
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Wang YX, Zeng XJ, Lu LQ, Ma LQ, Jiang DQ, Mu J, Wang XY, Zhang LK, Tang CS, Hao G. [Effects of 11, 12-epoxyeicosatrienoic acid preconditioning and postconditioning on Ca(2+)- handling proteins in myocardial ischemia/reperfusion injury in rats]. Zhongguo Yi Xue Ke Xue Yuan Xue Bao 2007; 29:787-791. [PMID: 18595260] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
OBJECTIVE To investigate the effects of 11, 12-epoxyeicosatrienoic acid (11, 12-EET) preconditioning and postconditioning on Ca(2+)-handling proteins in myocardial ischemia/reperfusion (IR) injury in rats and reveal the effects and mechanism of 11, 12-EET on cardioprotection. METHODS The IR injury model was built by stopping perfusion for 40 minutes followed by reperfusion for 30 minutes. The isolated Langendorff-perfused rat hearts were divided into 4 groups: control group, IR group, EET preconditioning (Pre-EET) group and EET postconditioning (Post-EET) group. The computer-based electrophysiological recorder system was used to measure the changes of the maximal rate of pressure increased in the contraction phase (+dp/dt(max)), the maximal rate of pressure decreased in the diastole phase (-dp/dt(max)), the left ventricular end diastolic pressure (LVEDP) and the difference of left ventricular pressure (delta LVP). The activity of Ca(2+)-ATPase in sarcoplasmic reticulum was measured with colorimetric method. Reverse transcription-polymerase chain reaction was used to assess the gene expression of C(a2+)-handling protein [sarcoplasic reticulum Ca(2+)-ATPase (SERCA), phospholamban (PLB), ryanodine receptor type 2 (RyR,), and 1, 4, 5-trisphosphate inositol receptor type 2 (IP3 R2) ] mRNAs level. RESULTS Compared with IR group, the myocardial functions, the value of Ca(2+)-ATPase, and the expressions of IP3 R2 mRNA were significantly increased and the expression of PLB mRNA was significantly decreased in both Pre-EET group and Post-EET group (P < 0.05, P < 0.01). And the expression of SERCA mRNA was significantly increased in Pre-EET group (P < 0. 05). However, no significant differences were detected between Pre-EET and Post-EET groups. Moreover, the expression of RyR2 mRNA was not significantly different among all groups. CONCLUSIONS 11, 12-EET preconditioning and post-conditioning can protect myocardium from IR injury by elevating the activity of Ca(2+)-ATPase in sarcoplasmic reticulum, up-regulating the expression of IP3 R2 mRNA, and down-regulating the expression of PLB mRNA. Moreover, up-regulating the expression of SERCA mRNA maybe one of mechanisms of 11, 12-EET preconditioning on cardio protection against IR injury.
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Affiliation(s)
- Yan-Xia Wang
- Department of Pathophysiology, Capital Medical University, Beijing 100069, China
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15
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Liao X, He J, Ma H, Tao J, Chen W, Leng X, Mai W, Zhen W, Liu J, Wang L. Angiotensin-converting enzyme inhibitor improves force and Ca2 +--frequency relationships in myocytes from rats with heart failure. Acta Cardiol 2007; 62:157-62. [PMID: 17536604 DOI: 10.2143/ac.62.2.2020236] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
OBJECTIVES The objectives were to study the effects of an ACE inhibitor on the force-frequency relationship (FFR) and its possible mechanism in isolated failing myocytes. METHODS AND RESULTS Male Wistar rats were randomized into a heart failure group treated with perindopril (CHF-T, 3 mg.kg(-1)d-1), a heart failure group without treatment (CHF-C) and a sham-operated group (PS). Heart failure was induced by constriction of the abdominal aorta. All groups were further followed up for 12 weeks. Left ventricular myocytes were isolated. Cell-shortening fraction (FS) and intracellular calcium transients were measured at different frequency field stimulations. A negative force-frequency relationship (FFR) was found in the CHF-C group compared with the positive-negative biphasic FFR in the PS group, and a flat FFR in the CHF-T group. Intracellular Ca2+ frequency relationships (CaFRs) were positive-negative biphasic in both the PS and CHF-T groups, whereas a negative CaFR was found in the CHF-C group. Regardless of the stimulation frequency, FS significantly correlated with [Ca2+]imax in the PS or CHF-C groups. Compared to the PS group, protein levels of SERCA2 significantly decreased and NCX1 increased in the CHF-C group. In the CHF-T group, these changes were reduced. CONCLUSION The ACE inhibitor could improve the impaired FFR of isolated failing myocytes. This effect was possibly mediated via ameliorating the disturbance of CaFR.
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Affiliation(s)
- Xinxue Liao
- Department of Cardiology, the First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
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Abstract
BACKGROUND AND OBJECTIVE Inhibition of established left ventricular hypertrophy (LVH) and fibrosis may bring clinical benefits by reducing cardiac morbidity and mortality. The mammalian target of rapamycin, mTOR, is known to play a critical role in determining cell and organ size. We investigated whether mTOR inhibition can inhibit the chronic pressure-overload-induced LVH and fibrosis. METHODS Male FVB/N mice underwent transverse aortic constriction (TAC) for 5 weeks to allow for establishment of LVH, followed by treatment with the mTOR inhibitor, Rapamune (2 mg/kg per day, gavage), for 4 weeks. Echocardiography was used to monitor changes in LVH and function. Haemodynamic, morphometric, histological and molecular analyses were conducted. RESULTS Inhibition of mTOR by Rapamune was confirmed by a suppression of activated phosphorylation of ribosomal S6 protein and eukaryotic translation initiation factor-4E due to pressure overload. Despite a comparable degree of pressure overload between the vehicle- or Rapamune-treated TAC groups, Rapamune treatment for 4 weeks attenuated TAC-induced LVH by 46%, estimated by LV weight or myocyte size, and LV fractional shortening was also preserved versus vehicle-treated control (39 +/- 1 versus 32 +/- 2%, P < 0.05). Inhibition of established LVH by Rapamune was associated with a 38% reduction in collagen content. Moreover, altered gene expression due to pressure overload was largely restored. CONCLUSION Despite sustained pressure overload, inhibition of mTOR by a 4-week period of Rapamune treatment attenuates chronically established LVH and cardiac fibrosis with preserved contractile function.
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Affiliation(s)
- Xiao-Ming Gao
- Experimental Cardiology Laboratory, Baker Heart Research Institute, Melbourne, Victoria, Australia.
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Kennedy DJ, Vetteth S, Xie M, Periyasamy SM, Xie Z, Han C, Basrur V, Mutgi K, Fedorov V, Malhotra D, Shapiro JI. Ouabain decreases sarco(endo)plasmic reticulum calcium ATPase activity in rat hearts by a process involving protein oxidation. Am J Physiol Heart Circ Physiol 2006; 291:H3003-11. [PMID: 16861692 DOI: 10.1152/ajpheart.00603.2006] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The effect of cardiac glycosides to increase cardiac inotropy by altering Ca(2+) cycling is well known but still poorly understood. The studies described in this report focus on defining the effects of ouabain signaling on sarcoplasmic reticulum Ca(2+)-ATPase function. Rat cardiac myocytes treated with 50 microM ouabain demonstrated substantial increases in systolic and diastolic Ca(2+) concentrations. The recovery time constant for the Ca(2+) transient, tau(Ca(2+)), was significantly prolonged by ouabain. Exposure to 10 microM H(2)O(2), which causes an increase in intracellular reactive oxygen species similar to that of 50 microM ouabain, caused a similar increase in tau(Ca(2+)). Concurrent exposure to 10 mM N-acetylcysteine or an aqueous extract from green tea (50 mg/ml) both prevented the increases in tau(Ca(2+)) as well as the changes in systolic or diastolic Ca(2+) concentrations. We also observed that 50 microM ouabain induced increases in developed pressure in addition to diastolic dysfunction in the isolated perfused rat heart. Coadministration of ouabain with N-acetylcysteine prevented these increases. Analysis of sarcoplasmic reticulum Ca(2+)-ATPase protein revealed increases in both the oxidation and nitrotyrosine content in the ouabain-treated hearts. Liquid chromatography-mass spectrometric analysis confirmed that the sarcoplasmic reticulum Ca(2+)-ATPase protein from ouabain-treated hearts had modifications consistent with oxidative and nitrosative stress. These data suggest that ouabain induces oxidative changes of the sarcoplasmic reticulum Ca(2+)-ATPase structure and function that may, in turn, produce some of the associated changes in Ca(2+) cycling and physiological function.
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Affiliation(s)
- David J Kennedy
- Dept. of Medicine, Medical University of Ohio, Toledo, Ohio 43614-5089, USA
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