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Ishizaka T, Yoshimatsu Y, Maeda Y, Chiba K, Mori K. Trastuzumab-Induced Negative Chronotropic and Lusitropic Effects in Cynomolgus Monkeys. J Cardiovasc Pharmacol 2022; 79:e41-e49. [PMID: 34654786 DOI: 10.1097/fjc.0000000000001157] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [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: 03/14/2021] [Accepted: 09/27/2021] [Indexed: 11/26/2022]
Abstract
ABSTRACT Treatment with trastuzumab, an antihuman epidermal growth factor receptor type 2 humanized monoclonal antibody, has been associated with heart failure in certain patients with cancer; however, the mechanism underlying trastuzumab-induced cardiac dysfunction remains unclear. This study was conducted to clarify the cardiac effects of trastuzumab in cynomolgus monkeys, which are commonly used as cross-reactive species in preclinical safety evaluation. Monkeys were treated with trastuzumab weekly for 1 month (5 doses in total). At first and fifth doses for pressure-volume loop analysis, trastuzumab at 20 mg·kg-1·10 min-1, equivalent to the human therapeutic dose, was administered intravenously to isoflurane-anesthetized animals, followed by 60 mg·kg-1·10 min-1 at a 30-minute interval. The other doses were fixed at 80 mg·kg-1·10 min-1 under unanesthetized conditions. After the first dose, reduced heart rate, decreases in maximal rate of fall of left ventricular pressure, and prolonged time constant for isovolumic relaxation, which are predictors of drug-induced changes in lusitropy, were observed at 20 and 60 mg·kg-1. The changes after the fifth dose were comparable with those after the first dose, indicating trastuzumab did not show exacerbation of cardiac function during the 1-month trial. No significant changes in slope of preload recruitable stroke work, which is a load-independent inotropic parameter, were observed at either dose. In conclusion, trastuzumab-induced little inotropic effect but induced negative chronotropic or lusitropic effects in monkeys, which might be associated with impaired left ventricular diastolic function.
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Affiliation(s)
- Tomomichi Ishizaka
- Medicinal Safety Research Laboratories, Daiichi Sankyo Co, Ltd, Tokyo, Japan
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2
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Chung YJ, Park KC, Tokar S, Eykyn TR, Fuller W, Pavlovic D, Swietach P, Shattock MJ. Off-target effects of sodium-glucose co-transporter 2 blockers: empagliflozin does not inhibit Na+/H+ exchanger-1 or lower [Na+]i in the heart. Cardiovasc Res 2021; 117:2794-2806. [PMID: 33135077 PMCID: PMC8683707 DOI: 10.1093/cvr/cvaa323] [Citation(s) in RCA: 48] [Impact Index Per Article: 16.0] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/19/2020] [Revised: 09/28/2020] [Accepted: 11/02/2020] [Indexed: 12/17/2022] Open
Abstract
AIMS Emipagliflozin (EMPA) is a potent inhibitor of the renal sodium-glucose co-transporter 2 (SGLT2) and an effective treatment for type-2 diabetes. In patients with diabetes and heart failure, EMPA has cardioprotective effects independent of improved glycaemic control, despite SGLT2 not being expressed in the heart. A number of non-canonical mechanisms have been proposed to explain these cardiac effects, most notably an inhibitory action on cardiac Na+/H+ exchanger 1 (NHE1), causing a reduction in intracellular [Na+] ([Na+]i). However, at resting intracellular pH (pHi), NHE1 activity is very low and its pharmacological inhibition is not expected to meaningfully alter steady-state [Na+]i. We re-evaluate this putative EMPA target by measuring cardiac NHE1 activity. METHODS AND RESULTS The effect of EMPA on NHE1 activity was tested in isolated rat ventricular cardiomyocytes from measurements of pHi recovery following an ammonium pre-pulse manoeuvre, using cSNARF1 fluorescence imaging. Whereas 10 µM cariporide produced near-complete inhibition, there was no evidence for NHE1 inhibition with EMPA treatment (1, 3, 10, or 30 µM). Intracellular acidification by acetate-superfusion evoked NHE1 activity and raised [Na+]i, reported by sodium binding benzofuran isophthalate (SBFI) fluorescence, but EMPA did not ablate this rise. EMPA (10 µM) also had no significant effect on the rate of cytoplasmic [Na+]i rise upon superfusion of Na+-depleted cells with Na+-containing buffers. In Langendorff-perfused mouse, rat and guinea pig hearts, EMPA did not affect [Na+]i at baseline nor pHi recovery following acute acidosis, as measured by 23Na triple quantum filtered NMR and 31P NMR, respectively. CONCLUSIONS Our findings indicate that cardiac NHE1 activity is not inhibited by EMPA (or other SGLT2i's) and EMPA has no effect on [Na+]i over a wide range of concentrations, including the therapeutic dose. Thus, the beneficial effects of SGLT2i's in failing hearts should not be interpreted in terms of actions on myocardial NHE1 or intracellular [Na+].
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Affiliation(s)
- Yu Jin Chung
- British Heart Foundation Centre of Research Excellence, King’s College London, The Rayne Institute, St Thomas’ Hospital, Lambeth Palace Road, London SE1 7EH, UK
| | - Kyung Chan Park
- Department of Physiology, Anatomy and Genetics, Parks Road, Oxford, OX1 3PT, UK
| | - Sergiy Tokar
- British Heart Foundation Centre of Research Excellence, King’s College London, The Rayne Institute, St Thomas’ Hospital, Lambeth Palace Road, London SE1 7EH, UK
| | - Thomas R Eykyn
- British Heart Foundation Centre of Research Excellence, King’s College London, The Rayne Institute, St Thomas’ Hospital, Lambeth Palace Road, London SE1 7EH, UK
- School of Biomedical Engineering and Imaging Sciences, King’s College London, The Rayne Institute, St Thomas' Hospital, Lambeth Palace Road, London SE1 7EH, UK
| | - William Fuller
- Institute of Cardiovascular & Medical Sciences, Sir James Black Building, University of Glasgow, University Avenue, Glasgow G12 8QQ, UK
| | - Davor Pavlovic
- Institute for Cardiovascular Sciences, University of Birmingham, Wolfson Drive, Birmingham B15 2TT, UK
| | - Pawel Swietach
- Department of Physiology, Anatomy and Genetics, Parks Road, Oxford, OX1 3PT, UK
| | - Michael J Shattock
- British Heart Foundation Centre of Research Excellence, King’s College London, The Rayne Institute, St Thomas’ Hospital, Lambeth Palace Road, London SE1 7EH, UK
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3
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Yang Q, Qian Z. Impacts of Yangxin decoction on the expressions of MMP-9, CaN, NFAT3 and GATA4 in myocardial tissue of rats with chronic heart failure. Pak J Pharm Sci 2021; 34:2059-2064. [PMID: 34862874] [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: 06/13/2023]
Abstract
To investigate the impacts of Yangxin decoction on the expressions of matrix metalloproteinase 9 (MMP-9), calcineurin (CaN), T cell activated nuclear factor 3 (NFAT3) and zinc finger transcription factor 4 (GATA4) in myocardial tissue of rats with chronic heart failure (CHF). 50 healthy SD rats were randomly divided into the normal control group (n = 10) and the operation group (n = 40). After successful modeling, the rats were randomly divided into 4 groups. And they were treated with Yangxin decoctions of low concentration (1.5 g/kg), medium concentration (2.5 g/kg), high concentration (3.5 g/kg) and distilled water (for 4 weeks). The LVSP, SAP, DAP and LVEDP in Yangxin decoction treatment groups were significantly superior to the model group. The LVEF, LVIDd and LVIDs in Yangxin decoction treatment groups were significantly superior to the model group. The activity of CaN in each group treated with Yangxin decoction was significantly lower than that in the model group. The expression levels of MMP-9, NFAT3, GATA4 protein in each group treated with Yangxin decoction were significantly lower than that in the model group.. Yangxin decoction can significantly improve the cardiac function, reduce CaN activity, decrease the expression levels of MMP-9, NFAT3 and GATA4, inhibit CaN/NFAT3 signaling pathway, increase myocardial remodeling and protect myocardial tissue in rats with CHF.
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Affiliation(s)
- Qing Yang
- Outpatient Pharmacy, Affiliated Hospital of Chifeng College, China
| | - Zhongyi Qian
- Department of Experimental Teaching Center of Basic Medicine Kunming Medical University, Kunming, China
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Zhu L, Liu Z, Huang LP, Zhou HR, Cao Y, Yang XP, Wang BJ, Yang ZL, Chen J. Angiotensin (1-7) Alleviates Postresuscitation Myocardial Dysfunction by Suppressing Oxidative Stress Through the Phosphoinositide 3-Kinase, Protein Kinase B, and Endothelial Nitric Oxide Synthase Signaling Pathway. J Cardiovasc Pharmacol 2021; 78:e65-e76. [PMID: 33929390 DOI: 10.1097/fjc.0000000000001037] [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] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/09/2020] [Accepted: 03/23/2021] [Indexed: 02/05/2023]
Abstract
ABSTRACT There is increasing evidence that angiotensin (1-7) [Ang (1-7)] is an endogenous biologically active component of the renin-angiotensin system. However, the role of the Ang (1-7)-MasR axis in postresuscitation myocardial dysfunction (PRMD) and its associated mechanism are still unclear. In this study, we investigated the effect of the Ang (1-7)-MasR axis on myocardial injury after cardiac arrest-cardiopulmonary resuscitation-restoration of spontaneous circulation. We established a model of oxygen/glucose deprivation-reperfusion in myocardial cells in vitro and a rat model of cardiac arrest-cardiopulmonary resuscitation-restoration of spontaneous circulation in vivo. The cell apoptosis rate and the expression of the superoxide anion 3-nitrotyrosine were decreased in the Ang (1-7) group in vitro and in vivo. The mean arterial pressure was decreased, whereas +LVdp/dtmax and -LVdp/dtmax were increased in rats in the Ang (1-7) group. The mRNA and protein levels of Ang II type 1 receptor, MasR, phosphoinositide 3-kinase, protein kinase B, and endothelial nitric oxide synthase were increased in the Ang (1-7) group in vivo. These results indicate that the Ang (1-7)-MasR axis can alleviate PRMD by reducing myocardial tissue damage and oxidative stress through activation of the phosphoinositide 3-kinase-protein kinase B-endothelial nitric oxide synthase signaling pathway and provide a new direction for the clinical treatment of PRMD.
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MESH Headings
- Angiotensin I/pharmacology
- Animals
- Apoptosis/drug effects
- Cardiopulmonary Resuscitation/adverse effects
- Cells, Cultured
- Disease Models, Animal
- Heart Arrest/physiopathology
- Heart Arrest/therapy
- Heart Diseases/enzymology
- Heart Diseases/etiology
- Heart Diseases/physiopathology
- Heart Diseases/prevention & control
- Male
- Myocytes, Cardiac/drug effects
- Myocytes, Cardiac/enzymology
- Myocytes, Cardiac/pathology
- Nitric Oxide Synthase Type III/metabolism
- Oxidative Stress/drug effects
- Peptide Fragments/pharmacology
- Phosphatidylinositol 3-Kinase/metabolism
- Proto-Oncogene Mas/agonists
- Proto-Oncogene Mas/genetics
- Proto-Oncogene Mas/metabolism
- Proto-Oncogene Proteins c-akt/metabolism
- Rats, Sprague-Dawley
- Receptor, Angiotensin, Type 1/genetics
- Receptor, Angiotensin, Type 1/metabolism
- Receptor, Angiotensin, Type 2/genetics
- Receptor, Angiotensin, Type 2/metabolism
- Return of Spontaneous Circulation
- Signal Transduction
- Ventricular Function, Left/drug effects
- Ventricular Pressure/drug effects
- Rats
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Affiliation(s)
- Li Zhu
- Department of Anesthesiology, The Second People's Hospital of Chengdu Xindu District, Chengdu, China
| | - Zhen Liu
- Department of Traditional Chinses Medicine, Beijing Hospital, National Center of Gerontology; Institute of Geriatric Medicine, Chinese Academy of Medical Sciences, Beijing, China
| | - Li-Ping Huang
- Department of Anesthesiology, The Chengdu Fifth People's Hospital, Chengdu, China
| | - Hou-Rong Zhou
- Department of General Practice, Guizhou Provincial People's Hospital, Guiyang, China
| | - Yu Cao
- Department of Emergency, West China Hospital of Sichuan University, Chengdu, China
| | - Xue-Ping Yang
- Department of Anesthesiology, Chengdu Integrated TCM & Western Medicine Hospital, Chengdu, China; and
| | - Bing-Jin Wang
- Department of Emergency, Guizhou Provincial People's Hospital, Guiyang, China
| | - Zi-Li Yang
- Department of Anesthesiology, The Second People's Hospital of Chengdu Xindu District, Chengdu, China
| | - Jing Chen
- Department of Anesthesiology, The Second People's Hospital of Chengdu Xindu District, Chengdu, China
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5
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Sen P, Gupta K, Kumari A, Singh G, Pandey S, Singh R. Wnt/β-Catenin Antagonist Pyrvinium Exerts Cardioprotective Effects in Polymicrobial Sepsis Model by Attenuating Calcium Dyshomeostasis and Mitochondrial Dysfunction. Cardiovasc Toxicol 2021; 21:517-532. [PMID: 33723718 DOI: 10.1007/s12012-021-09643-4] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/05/2020] [Accepted: 03/01/2021] [Indexed: 01/22/2023]
Abstract
Calcium dysregulation and mitochondrial dysfunction are key elements in the development of sepsis-induced cardiac dysfunction. Evidences have suggested that inhibition of Wnt/β-Catenin signalling prevents cardiac dysfunction and remodelling in surgical, hypertension and pressure overload models. The present study investigated the effects of Wnt/β-Catenin inhibitor on calcium overload and mitochondrial dysfunction in rat sepsis model of cardiomyopathy. Induction of sepsis by cecal ligation puncture (CLP) resulted in the up-regulation of cardiac β-catenin transcriptional levels and cardiac dysfunction depicted by increased serum lactate dehydrogenase, CK-MB levels reduced maximum (dp/dt max.) and minimum developed pressure (dp/dt min.), increased LVEsDP and relaxation constant tau values. Moreover, oxidative and inflammatory stress, immune cell infiltration, increased myeloperoxidase activity, enhanced caspase-3 activity and fibronectin protein levels were observed in septic rat's heart. Also, septic rat's heart displayed mitochondrial dysfunction due to mPTP opening, increased calcium up-regulation in left ventricular apex tissues and whole heart, increased collagen staining, necrosis and structural damage. Pre-treatment with Wnt/β-Catenin antagonist attenuated sepsis-induced serum and tissue biochemical changes, cardiac dysfunction and structural alterations by inhibiting mitochondrial mPTP opening and restricting calcium overloading in cardiac tissue.
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Affiliation(s)
- Pallavi Sen
- Department of Pharmacology, ISF College of Pharmacy, Moga, Punjab, India
| | - Kirti Gupta
- Department of Pharmacy, Maharishi Markandeshwar Deemed to be University, Mullana, Ambala, Haryana, India
| | - Abha Kumari
- Department of Pharmacology, ISF College of Pharmacy, Moga, Punjab, India
| | - Gaaminepreet Singh
- Department of Pharmacology, ISF College of Pharmacy, Moga, Punjab, India.
| | - Sneha Pandey
- Department of Pharmacology, ISF College of Pharmacy, Moga, Punjab, India
| | - Ragini Singh
- Department of Pharmacology, ISF College of Pharmacy, Moga, Punjab, India
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6
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Doghri Y, Dubreil L, Lalanne V, Hélissen O, Fleurisson R, Thorin C, Desfontis JC, Mallem MY. Soluble guanylate cyclase chronic stimulation effects on cardiovascular reactivity in cafeteria diet-induced rat model of metabolic syndrome. Eur J Pharmacol 2021; 899:173978. [PMID: 33691164 DOI: 10.1016/j.ejphar.2021.173978] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2020] [Revised: 02/05/2021] [Accepted: 02/19/2021] [Indexed: 11/19/2022]
Abstract
Metabolic syndrome is linked to an increased risk of cardiovascular complications by a mechanism involving mainly decreased nitric oxide (NO) bioavailability and impaired NO-soluble guanylate cyclase (sGC)- cyclic guanosine monophosphate (cGMP) signalling (NO-sGC-cGMP). To further develop this scientific point, this study aimed to investigate the effects of long-term treatment with BAY 41-2272 (a sGC stimulator) on cardiovascular reactivity of spontaneously hypertensive rats (SHR) as a model of metabolic syndrome. SHR were randomly divided into 3 groups: control group, cafeteria diet (CD)-fed group and CD-fed group treated daily with BAY 41-2272 (5 mg/kg) by gastric gavage for 12 weeks. In vivo measurements of body weight, abdominal circumference, blood pressure and glucose tolerance test were performed. At the end of the feeding period, ex vivo cumulative concentration-response curves were performed on isolated perfused heart (isoproterenol (0.1 nM - 1 μM)) and thoracic aorta (phenylephrine (1 nM-10 μM), acetylcholine (1 nM-10 μM), and sodium nitroprusside (SNP) (0.1 nM-0.1 μM)). We showed that chronic CD feeding induced abdominal obesity, hypertriglyceridemia, glucose intolerance and exacerbated arterial hypertension in SHR. Compared to control group, CD-fed group showed a decrease in β-adrenoceptor-induced cardiac inotropy, in coronary perfusion pressure and in aortic contraction to phenylephrine. While relaxing effects of acetylcholine and SNP were unchanged. BAY 41-2272 long-term treatment markedly prevented arterial hypertension development and glucose intolerance, enhanced the α1-adrenoceptor-induced vasoconstriction, and restored cardiac inotropy and coronary vasodilation. These findings suggest that BAY 41-2272 may be a potential novel drug for preventing metabolic and cardiovascular complications of metabolic syndrome.
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MESH Headings
- Animals
- Aorta, Thoracic/drug effects
- Aorta, Thoracic/enzymology
- Aorta, Thoracic/physiopathology
- Cardiovascular Diseases/enzymology
- Cardiovascular Diseases/etiology
- Cardiovascular Diseases/physiopathology
- Cardiovascular Diseases/prevention & control
- Coronary Circulation/drug effects
- Cyclic GMP/metabolism
- Disease Models, Animal
- Enzyme Activation
- Enzyme Activators/pharmacology
- Glucose Intolerance/enzymology
- Glucose Intolerance/etiology
- Glucose Intolerance/physiopathology
- Glucose Intolerance/prevention & control
- Hypertension/enzymology
- Hypertension/etiology
- Hypertension/physiopathology
- Hypertension/prevention & control
- Hypertriglyceridemia/enzymology
- Hypertriglyceridemia/etiology
- Hypertriglyceridemia/physiopathology
- Hypertriglyceridemia/prevention & control
- Isolated Heart Preparation
- Male
- Metabolic Syndrome/enzymology
- Metabolic Syndrome/etiology
- Metabolic Syndrome/physiopathology
- Metabolic Syndrome/prevention & control
- Nitric Oxide Synthase Type II/metabolism
- Obesity, Abdominal/enzymology
- Obesity, Abdominal/etiology
- Obesity, Abdominal/physiopathology
- Obesity, Abdominal/prevention & control
- Pyrazoles/pharmacology
- Pyridines/pharmacology
- Rats, Inbred SHR
- Soluble Guanylyl Cyclase/metabolism
- Vasoconstriction/drug effects
- Vasodilation/drug effects
- Ventricular Function, Left/drug effects
- Ventricular Pressure/drug effects
- Rats
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Affiliation(s)
- Yosra Doghri
- UPSP NP3 (2017.B146), Nutrition, Pathophysiology and Pharmacology, Oniris, Nantes-Atlantic College of Veterinary Medicine Food Sciences and Engineering, 44307, Nantes Cedex 03, France
| | - Laurence Dubreil
- UMR PAnTher 703 INRA/Oniris Animal Pathophysiology and Bio Therapy for Muscle and Nervous System Diseases, Oniris, Nantes-Atlantic College of Veterinary Medicine Food Sciences and Engineering, 44307, Nantes Cedex 03, France
| | - Valérie Lalanne
- UPSP NP3 (2017.B146), Nutrition, Pathophysiology and Pharmacology, Oniris, Nantes-Atlantic College of Veterinary Medicine Food Sciences and Engineering, 44307, Nantes Cedex 03, France
| | - Ophélie Hélissen
- UPSP NP3 (2017.B146), Nutrition, Pathophysiology and Pharmacology, Oniris, Nantes-Atlantic College of Veterinary Medicine Food Sciences and Engineering, 44307, Nantes Cedex 03, France
| | - Romain Fleurisson
- UMR PAnTher 703 INRA/Oniris Animal Pathophysiology and Bio Therapy for Muscle and Nervous System Diseases, Oniris, Nantes-Atlantic College of Veterinary Medicine Food Sciences and Engineering, 44307, Nantes Cedex 03, France
| | - Chantal Thorin
- UPSP NP3 (2017.B146), Nutrition, Pathophysiology and Pharmacology, Oniris, Nantes-Atlantic College of Veterinary Medicine Food Sciences and Engineering, 44307, Nantes Cedex 03, France
| | - Jean-Claude Desfontis
- UPSP NP3 (2017.B146), Nutrition, Pathophysiology and Pharmacology, Oniris, Nantes-Atlantic College of Veterinary Medicine Food Sciences and Engineering, 44307, Nantes Cedex 03, France
| | - M Yassine Mallem
- UPSP NP3 (2017.B146), Nutrition, Pathophysiology and Pharmacology, Oniris, Nantes-Atlantic College of Veterinary Medicine Food Sciences and Engineering, 44307, Nantes Cedex 03, France.
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Fukushima H, Oguchi T, Sato H, Nakadate Y, Sato T, Omiya K, Kawakami A, Matsuoka T, Matsukawa T. Ulinastatin attenuates protamine-induced cardiotoxicity in rats by inhibiting tumor necrosis factor alpha. Naunyn Schmiedebergs Arch Pharmacol 2021; 394:373-381. [PMID: 33029649 DOI: 10.1007/s00210-020-01983-2] [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] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/29/2020] [Accepted: 09/29/2020] [Indexed: 11/24/2022]
Abstract
Protamine causes cardiac depression, which may be mediated by tumor necrosis factor alpha (TNF-α). Ulinastatin, a human urinary protease inhibitor, inhibits TNF-α. Here, we aimed to investigate whether ulinastatin prevented protamine-induced myocardial depression by inhibiting TNF-α. Rat hearts were perfused using a Langendorff system, and three protocols were followed. Protocol 1: The hearts were divided into saline, ulinastatin-low, and ulinastatin-high groups. Protamine was administered to each group, and myocardial contractility was the primary outcome. Protocol 2: The hearts were allotted to saline or ulinastatin group. Protamine was administered to each group. TNF-α expression in the coronary effluent and myocardial tissue was measured. Protocol 3: The hearts were allotted to saline and ulinastatin groups. Recombinant rat-TNF-α was administered to each group. Protamine alone reduced the maximum left ventricular pressure derivative (LV dP/dt max) by 45 ± 4%. In contrast, the reduction in LV dP/dt max was 4 ± 3% in the ulinastatin-high group. Compared with that in the saline group, the increase in TNF-α in the coronary effluent was attenuated in the ulinastatin group. Recombinant TNF-α alone reduced LV dP/dt max (- 21 ± 14%). In contrast, when TNF-α was added in the presence of ulinastatin, the decrease in LV dP/dt max was prevented significantly (- 3 ± 8%). We showed, for the first time, that ulinastatin protected against protamine-induced myocardial damage, both by inhibiting TNF-α synthesis and by directly preventing the cardiodepressant action of TNF-α.
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Affiliation(s)
- Hisashi Fukushima
- Department of Anesthesiology, Faculty of Medicine, University of Yamanashi, 1110 Shimokato, Chuo-City, Yamanashi, 409-3898, Japan
- Department of Anesthesia, National Hospital Organization Mito Medical Center, Sakuranosato 280, Ibaraki-machi, Higashiibaraki-gun, Ibaraki, 311-3193, Japan
| | - Takeshi Oguchi
- Department of Anesthesiology, Faculty of Medicine, University of Yamanashi, 1110 Shimokato, Chuo-City, Yamanashi, 409-3898, Japan.
| | - Hiroaki Sato
- Department of Anesthesia, Royal Victoria Hospital, McGill University Health Centre, 1001 Decarie Boulevard, Montreal, Quebec, H4A 3J1, Canada
| | - Yosuke Nakadate
- Department of Anesthesiology, Faculty of Medicine, University of Yamanashi, 1110 Shimokato, Chuo-City, Yamanashi, 409-3898, Japan
| | - Tamaki Sato
- Department of Anesthesia, Royal Victoria Hospital, McGill University Health Centre, 1001 Decarie Boulevard, Montreal, Quebec, H4A 3J1, Canada
| | - Keisuke Omiya
- Department of Anesthesiology, Faculty of Medicine, University of Yamanashi, 1110 Shimokato, Chuo-City, Yamanashi, 409-3898, Japan
| | - Akiko Kawakami
- Department of Anesthesiology, Faculty of Medicine, University of Yamanashi, 1110 Shimokato, Chuo-City, Yamanashi, 409-3898, Japan
| | - Toru Matsuoka
- Department of Anesthesiology, Faculty of Medicine, University of Yamanashi, 1110 Shimokato, Chuo-City, Yamanashi, 409-3898, Japan
| | - Takashi Matsukawa
- Department of Anesthesiology, Faculty of Medicine, University of Yamanashi, 1110 Shimokato, Chuo-City, Yamanashi, 409-3898, Japan
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8
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Xue X, Zhang S, Jiang W, Wang J, Xin Q, Sun C, Li K, Qi T, Luan Y. Protective effect of baicalin against pulmonary arterial hypertension vascular remodeling through regulation of TNF-α signaling pathway. Pharmacol Res Perspect 2021; 9:e00703. [PMID: 33421306 PMCID: PMC7796790 DOI: 10.1002/prp2.703] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [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: 11/10/2020] [Revised: 11/25/2020] [Accepted: 11/26/2020] [Indexed: 12/16/2022] Open
Abstract
Pulmonary arterial hypertension (PAH) is a progressive cardiovascular disease with high mortality. However, there were no efficient medical drugs for PAH to enormously improve the survival and quality of life measures. The present study aimed to explore the protective effect of baicalin against experimental PAH in vivo and vitro. All the experimental rats received intraperitoneal injection of monocrotaline (MCT) to induce PAH model. Baicalin was given by intragastric administration from 2 days after MCT injection. Forty animals were randomly divided into four groups: Control, MCT, saline-, and baicalin-treated groups (n = 10 in each). Post-operation, hemodynamic data, and index of right ventricular hypertrophy (RVHI) were recorded to evaluate the inhibition of baicalin on MCT-induced PAH. Furthermore, pulmonary artery smooth muscle cells (PASMCs) model induced by tumor necrosis factor-α (TNF-α) was used to observe the inhibition of vascular cells proliferation in vitro. The results demonstrated that baicalin significantly attenuated MCT-induced right ventricular systolic pressure (RVSP), the index of right ventricular hypertrophy, and vessel wall thickness; inhibit inflammatory and cell proliferation induced by MCT or TNF-α, respectively. In addition, we found that baicalin might protect against experimental PAH via regulating the TNF-α/BMPR2 signaling pathway.
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Affiliation(s)
- Xia Xue
- Department of PharmacyThe Second HospitalCheeloo College of MedicineShandong UniversityJinanShandongChina
| | - Shanshan Zhang
- Department of EmergencyThe Second HospitalCheeloo College of MedicineShandong UniversityJinanShandongChina
| | - Wen Jiang
- Central Research LaboratoryThe Second HospitalCheeloo College of MedicineShandong UniversityJinanShandongChina
| | - Jue Wang
- Central Research LaboratoryThe Second HospitalCheeloo College of MedicineShandong UniversityJinanShandongChina
| | - Qian Xin
- Central Research LaboratoryThe Second HospitalCheeloo College of MedicineShandong UniversityJinanShandongChina
| | - Chao Sun
- Central Research LaboratoryThe Second HospitalCheeloo College of MedicineShandong UniversityJinanShandongChina
| | - Kailin Li
- Central Research LaboratoryThe Second HospitalCheeloo College of MedicineShandong UniversityJinanShandongChina
| | - Tonggang Qi
- Central Research LaboratoryThe Second HospitalCheeloo College of MedicineShandong UniversityJinanShandongChina
| | - Yun Luan
- Central Research LaboratoryThe Second HospitalCheeloo College of MedicineShandong UniversityJinanShandongChina
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9
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Bannehr M, Löhr L, Gelep J, Haverkamp W, Schunck WH, Gollasch M, Wutzler A. Linoleic Acid Metabolite DiHOME Decreases Post-ischemic Cardiac Recovery in Murine Hearts. Cardiovasc Toxicol 2020; 19:365-371. [PMID: 30725262 DOI: 10.1007/s12012-019-09508-x] [Citation(s) in RCA: 19] [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] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Cardiac ischemia/reperfusion injury is associated with the formation and action of lipid mediators derived from polyunsaturated fatty acids. Among them, linoleic acid (LA) is metabolized to epoxyoctadecanoic acids (EpOMEs) by cytochrome P450 (CYP) epoxygenases and further to dihydroxyoctadecanoic acids (DiHOMEs) by soluble epoxide hydrolase (sEH). We hypothesized that EpOMEs and/or DiHOMEs may affect cardiac post-ischemic recovery and addressed this question using isolated murine hearts in a Langendorff system. Hearts from C57Bl6 mice were exposed to 12,13-EpOME, 12,13-DiHOME, or vehicle (phosphate buffered sodium; PBS). Effects on basal cardiac function and functional recovery during reperfusion following 20 min of ischemia were investigated. Electrocardiogram (ECG), left ventricular (LV) pressure and coronary flow (CF) were continuously measured. Ischemia reperfusion experiments were repeated after administration of the sEH-inhibitor 12-(3-adamantan-1-yl-ureido)dodecanoic acid (AUDA). At a concentration of 100 nM, both EpOME and DiHOME decreased post-ischemic functional recovery in murine hearts. There was no effect on basal cardiac parameters. The detrimental effects seen with EpOME, but not DiHOME, were averted by sEH inhibition (AUDA). Our results indicate that LA-derived mediators EpOME/DiHOME may play an important role in cardiac ischemic events. Inhibition of sEH could provide a novel treatment option to prevent detrimental DiHOME effects in acute cardiac ischemia.
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Affiliation(s)
- Marwin Bannehr
- Department of Cardiology, Charité - Universitätsmedizin Berlin, Campus Virchow-Klinikum, Augustenburger Platz 1, 13353, Berlin, Germany.
| | - Lena Löhr
- Department of Cardiology, Charité - Universitätsmedizin Berlin, Campus Virchow-Klinikum, Augustenburger Platz 1, 13353, Berlin, Germany
| | - Julia Gelep
- Department of Cardiology, Charité - Universitätsmedizin Berlin, Campus Virchow-Klinikum, Augustenburger Platz 1, 13353, Berlin, Germany
| | - Wilhelm Haverkamp
- Department of Cardiology, Charité - Universitätsmedizin Berlin, Campus Virchow-Klinikum, Augustenburger Platz 1, 13353, Berlin, Germany
| | | | - Maik Gollasch
- Experimental and Clinical Research Center, 16341, Berlin, Germany
- Department of Nephrology and Intensive Care Medicine, Charité - Universitätsmedizin Berlin, Campus Virchow-Klinikum, Augustenburger Platz 1, 13353, Berlin, Germany
| | - Alexander Wutzler
- Experimental and Clinical Research Center, 16341, Berlin, Germany
- Department of Electrophysiology and Cardiac Rhythm Management, St. Joseph Hospital, Ruhr-University Bochum, 44791, Bochum, Germany
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10
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Carll AP, Salatini R, Pirela SV, Wang Y, Xie Z, Lorkiewicz P, Naeem N, Qian Y, Castranova V, Godleski JJ, Demokritou P. Inhalation of printer-emitted particles impairs cardiac conduction, hemodynamics, and autonomic regulation and induces arrhythmia and electrical remodeling in rats. Part Fibre Toxicol 2020; 17:7. [PMID: 31996220 PMCID: PMC6990551 DOI: 10.1186/s12989-019-0335-z] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [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: 08/26/2019] [Accepted: 12/29/2019] [Indexed: 02/08/2023] Open
Abstract
BACKGROUND Using engineered nanomaterial-based toners, laser printers generate aerosols with alarming levels of nanoparticles that bear high bioactivity and potential health risks. Yet, the cardiac impacts of printer-emitted particles (PEPs) are unknown. Inhalation of particulate matter (PM) promotes cardiovascular morbidity and mortality, and ultra-fine particulates (< 0.1 μm aerodynamic diameter) may bear toxicity unique from larger particles. Toxicological studies suggest that PM impairs left ventricular (LV) performance; however, such investigations have heretofore required animal restraint, anesthesia, or ex vivo preparations that can confound physiologic endpoints and/or prohibit LV mechanical assessments during exposure. To assess the acute and chronic effects of PEPs on cardiac physiology, male Sprague Dawley rats were exposed to PEPs (21 days, 5 h/day) while monitoring LV pressure (LVP) and electrocardiogram (ECG) via conscious telemetry, analyzing LVP and heart rate variability (HRV) in four-day increments from exposure days 1 to 21, as well as ECG and baroreflex sensitivity. At 2, 35, and 70 days after PEPs exposure ceased, rats received stress tests. RESULTS On day 21 of exposure, PEPs significantly (P < 0.05 vs. Air) increased LV end systolic pressure (LVESP, + 18 mmHg) and rate-pressure-product (+ 19%), and decreased HRV indicating sympathetic dominance (root means squared of successive differences [RMSSD], - 21%). Overall, PEPs decreased LV ejection time (- 9%), relaxation time (- 3%), tau (- 5%), RMSSD (- 21%), and P-wave duration (- 9%). PEPs increased QTc interval (+ 5%) and low:high frequency HRV (+ 24%; all P < 0.05 vs. Air), while tending to decrease baroreflex sensitivity and contractility index (- 15% and - 3%, P < 0.10 vs. Air). Relative to Air, at both 2 and 35 days after PEPs, ventricular arrhythmias increased, and at 70 days post-exposure LVESP increased. PEPs impaired ventricular repolarization at 2 and 35 days post-exposure, but only during stress tests. At 72 days post-exposure, PEPs increased urinary dopamine 5-fold and protein expression of ventricular repolarizing channels, Kv1.5, Kv4.2, and Kv7.1, by 50%. CONCLUSIONS Our findings suggest exposure to PEPs increases cardiovascular risk by augmenting sympathetic influence, impairing ventricular performance and repolarization, and inducing hypertension and arrhythmia. PEPs may present significant health risks through adverse cardiovascular effects, especially in occupational settings, among susceptible individuals, and with long-term exposure.
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Affiliation(s)
- Alex P. Carll
- Department of Physiology, School of Medicine, University of Louisville, Louisville, KY USA
- Christina Lee Brown Envirome Institute, University of Louisville, Louisville, KY USA
- Center for Nanotechnology and Nanotoxicology. Department of Environmental Health, T.H. Chan School of Public Health, Harvard University, 665 Huntington Avenue, Room 1310, Boston, MA 02115 USA
| | - Renata Salatini
- Department of Physiology, School of Medicine, University of Louisville, Louisville, KY USA
- Department of Surgery, University of Sao Paulo Medical School, Sao Paulo, Brazil
| | - Sandra V. Pirela
- Center for Nanotechnology and Nanotoxicology. Department of Environmental Health, T.H. Chan School of Public Health, Harvard University, 665 Huntington Avenue, Room 1310, Boston, MA 02115 USA
| | - Yun Wang
- Center for Nanotechnology and Nanotoxicology. Department of Environmental Health, T.H. Chan School of Public Health, Harvard University, 665 Huntington Avenue, Room 1310, Boston, MA 02115 USA
- Department of Occupational and Environmental Health Sciences,School of Public Health, Peking University, Beijing, People’s Republic of China
| | - Zhengzhi Xie
- Christina Lee Brown Envirome Institute, University of Louisville, Louisville, KY USA
| | - Pawel Lorkiewicz
- Christina Lee Brown Envirome Institute, University of Louisville, Louisville, KY USA
| | - Nazratan Naeem
- Christina Lee Brown Envirome Institute, University of Louisville, Louisville, KY USA
| | - Yong Qian
- Pathology and Physiology Research Branch, Health Effects Laboratory Division, National Institute for Occupational Safety and Health, Morgantown, WV USA
| | - Vincent Castranova
- Department of Pharmaceutical Sciences/Mary Babb Randolph Cancer Center, West Virginia University, Morgantown, WV USA
| | - John J. Godleski
- Center for Nanotechnology and Nanotoxicology. Department of Environmental Health, T.H. Chan School of Public Health, Harvard University, 665 Huntington Avenue, Room 1310, Boston, MA 02115 USA
| | - Philip Demokritou
- Center for Nanotechnology and Nanotoxicology. Department of Environmental Health, T.H. Chan School of Public Health, Harvard University, 665 Huntington Avenue, Room 1310, Boston, MA 02115 USA
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11
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Tezuka A, Higo K, Nakamukae Y, Nishihara S, Kamikawa M, Shimofuku C, Kawazoe K, Ohishi M. Bisoprolol Successfully Improved the Intraventricular Pressure Gradient in a Patient with Midventricular Obstructive Hypertrophic Cardiomyopathy with an Apex Aneurysm due to Apical Myocardial Damage. Intern Med 2019; 58:535-539. [PMID: 30333393 PMCID: PMC6421145 DOI: 10.2169/internalmedicine.0997-18] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/12/2018] [Accepted: 05/20/2018] [Indexed: 01/19/2023] Open
Abstract
Midventricular obstructive hypertrophic cardiomyopathy (MVOHCM) is a rare form of hypertrophic cardiomyopathy (HCM). An 80-year-old man was administered bisoprolol and warfarin therapies as treatment for MVOHCM with an apex aneurysm due to myocardial damage and intra-aneurysmal thrombus not complicated by atrial fibrillation. The pressure gradient in the midventricle successfully improved from 53.9 to 21.8 mmHg, and the intra-aneurysmal thrombus disappeared.
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Affiliation(s)
- Ayano Tezuka
- Departments of Cardiovascular Medicine, Japanese Red Cross Kagoshima Hospital, Japan
| | - Kenjuro Higo
- Departments of Cardiovascular Medicine, Japanese Red Cross Kagoshima Hospital, Japan
| | - Yuta Nakamukae
- Departments of Clinical Laboratory Unit, Japanese Red Cross Kagoshima Hospital, Japan
| | - Sanae Nishihara
- Departments of Clinical Laboratory Unit, Japanese Red Cross Kagoshima Hospital, Japan
| | - Masaki Kamikawa
- Departments of Clinical Laboratory Unit, Japanese Red Cross Kagoshima Hospital, Japan
| | - Chihiro Shimofuku
- Departments of Clinical Laboratory Unit, Japanese Red Cross Kagoshima Hospital, Japan
| | - Kazumasa Kawazoe
- Departments of Neurosurgery, Japanese Red Cross Kagoshima Hospital, Japan
| | - Mitsuru Ohishi
- Departments of Cardiovascular Medicine and Hypertension, Graduate School of Medical and Dental Sciences, Kagoshima University, Japan
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12
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Imai Y, Kariya T, Iwakiri M, Yamada Y, Takimoto E. Sildenafil ameliorates right ventricular early molecular derangement during left ventricular pressure overload. PLoS One 2018; 13:e0195528. [PMID: 29621314 PMCID: PMC5886579 DOI: 10.1371/journal.pone.0195528] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [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: 01/16/2018] [Accepted: 03/23/2018] [Indexed: 12/12/2022] Open
Abstract
Right ventricular (RV) dysfunction following left ventricular (LV) failure is associated with poor prognosis. RV remodeling is thought initiated by the increase in the afterload of RV due to secondary pulmonary hypertension (PH) to impaired LV function; however, RV molecular changes might occur in earlier stages of the disease. cGMP (cyclic guanosine monophosphate)-phosphodiesterase 5 (PDE5) inhibitors, widely used to treat PH through their pulmonary vasorelaxation properties, have shown direct cardiac benefits, but their impacts on the RV in LV diseases are not fully determined. Here we show that RV molecular alterations occur early in the absence of RV hemodynamic changes during LV pressure-overload and are ameliorated by PDE5 inhibition. Two-day moderate LV pressure-overload (transverse aortic constriction) neither altered RV pressure/ function nor RV weight in mice, while it induced only mild LV hypertrophy. Importantly, pathological molecular features were already induced in the RV free wall myocardium, including up-regulation of gene markers for hypertrophy and inflammation, and activation of extracellular signal-regulated kinase (ERK) and calcineurin. Concomitant PDE5 inhibition (sildenafil) prevented induction of such pathological genes and activation of ERK and calcineurin in the RV as well as in the LV. Importantly, dexamethasone also prevented these RV molecular changes, similarly to sildenafil treatment. These results suggest the contributory role of inflammation to the early pathological interventricular interaction between RV and LV. The current study provides the first evidence for the novel early molecular cross-talk between RV and LV, preceding RV hemodynamic changes in LV disease, and supports the therapeutic strategy of enhancing cGMP signaling pathway to treat heart diseases.
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Affiliation(s)
- Yousuke Imai
- Department of Anesthesiology, Graduate School of Medicine, The University of Tokyo, Bunkyo-ku, Tokyo, Japan
| | - Taro Kariya
- Department of Anesthesiology, Graduate School of Medicine, The University of Tokyo, Bunkyo-ku, Tokyo, Japan
| | - Masaki Iwakiri
- Department of Anesthesiology, Graduate School of Medicine, The University of Tokyo, Bunkyo-ku, Tokyo, Japan
| | - Yoshitsugu Yamada
- Department of Anesthesiology, Graduate School of Medicine, The University of Tokyo, Bunkyo-ku, Tokyo, Japan
| | - Eiki Takimoto
- Department of Cardiovascular Medicine, Graduate School of Medicine, The University of Tokyo, Bunkyo-ku, Tokyo, Japan
- Division of Cardiology, Department of Medicine, Johns Hopkins University School of Medicine, Baltimore, Maryland, United States of America
- * E-mail: ,
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13
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Francis BN, Salameh M, Khamisy-Farah R, Farah R. Tetrahydrobiopterin (BH 4 ): Targeting endothelial nitric oxide synthase as a potential therapy for pulmonary hypertension. Cardiovasc Ther 2018; 36. [PMID: 29151278 DOI: 10.1111/1755-5922.12312] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/17/2017] [Revised: 10/18/2017] [Accepted: 11/11/2017] [Indexed: 12/15/2022] Open
Abstract
PURPOSE Pulmonary Hypertension (PH) is complex disease which is associated with endothelial and cardiac dysfunction. Tetrahydrobiopterin (BH4 ) regulates endothelial nitric oxide synthase (eNOS) to produce nitric oxide rather than superoxide which maintains normal endothelial and cardiac function. This study explores the therapeutic potential of BH4 in experimental PH. METHODS Monocrotaline-induced PH in rats and Hph-1 deficiency in mice were used for animal experiments. Hemodynamic measurements using pressure transducers were conducted for pulmonary and cardiac pressures, and Langendorff apparatus was used for isolated heart experiments; preventive as well as rescue treatment protocols were conducted; tissues were collected for histological and biochemical studies. RESULTS In vivo acute BH4 administration reduced pulmonary artery pressure (PAP) only in the MCT rat. In a Langendorff preparation, BH4 increased right ventricular systolic pressure (RVSP) in right ventricular hypertrophy (RVH) but not in control. In "prevention" therapy, BH4 (10 and 100 mg/kg) attenuated the development of PH in rat MCT model. eNOS protein levels in lung homogenates were maintained and cGMP levels were increased. In "rescue" therapy, BH4 (10 and 100 mg/kg) ameliorated pulmonary vascular muscularization in a dose-dependent manner. RVSP was reduced in RVH and pulmonary vascular muscularization was attenuated. BH4 at 10 mg/kg reduced RV myocyte diameter while BH4 at 100 mg/kg reversed it to control level. BH4 restored normal levels of eNOS protein and in a dose of 100 mg/kg enhanced lung tissue levels of BH4 , cGMP, and NO compared to placebo. CONCLUSION The current study provides scientific evidence for a therapeutic potential of BH4 in PH and invites further investigation.
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MESH Headings
- Animals
- Antihypertensive Agents/pharmacology
- Arterial Pressure/drug effects
- Biopterins/analogs & derivatives
- Biopterins/pharmacology
- Cyclic GMP/metabolism
- Disease Models, Animal
- Dose-Response Relationship, Drug
- Enzyme Inhibitors/pharmacology
- GTP Cyclohydrolase/deficiency
- GTP Cyclohydrolase/genetics
- Hypertension, Pulmonary/chemically induced
- Hypertension, Pulmonary/enzymology
- Hypertension, Pulmonary/physiopathology
- Hypertension, Pulmonary/prevention & control
- Isolated Heart Preparation
- Male
- Mice, Inbred C57BL
- Mice, Knockout
- Monocrotaline
- Myocardial Contraction/drug effects
- Nitric Oxide/metabolism
- Nitric Oxide Synthase Type III/antagonists & inhibitors
- Nitric Oxide Synthase Type III/metabolism
- Rats, Sprague-Dawley
- Signal Transduction/drug effects
- Time Factors
- Ventricular Function, Right/drug effects
- Ventricular Pressure/drug effects
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Affiliation(s)
- Bahaa N Francis
- Experimental Medicine and Toxicology, Imperial College London, Hammersmith Hospital, London, UK
- Department of Internal Medicine B, Ziv Medical Center, Safad, Israel
- Faculty of Medicine in the Galilee, Bar-Ilan University, Safed, Israel
| | - Maram Salameh
- Pharmacy Department, Carmel Medical Center, Haifa, Israel
| | | | - Raymond Farah
- Department of Internal Medicine B, Ziv Medical Center, Safad, Israel
- Faculty of Medicine in the Galilee, Bar-Ilan University, Safed, Israel
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14
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Liu H, Wang C, Qiao Z, Xu Y. Protective effect of curcumin against myocardium injury in ischemia reperfusion rats. Pharm Biol 2017; 55:1144-1148. [PMID: 28224816 PMCID: PMC6130472 DOI: 10.1080/13880209.2016.1214741] [Citation(s) in RCA: 55] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/05/2016] [Revised: 07/06/2016] [Accepted: 07/12/2016] [Indexed: 06/06/2023]
Abstract
CONTEXT Curcumin has long been used as a condiment and a traditional medicine worldwide. OBJECTIVE The current study investigates the possible protective effect of curcumin on heart function in myocardium ischemia-reperfusion (MIR) rats. MATERIALS AND METHODS We fed Sprague-Dawley (SD) rats (10 in each group) either curcumin (10, 20 or 30 mg/kg/d) or saline. Twenty days later, the rats were subjected to myocardial injuries by ligating the left anterior descending coronary artery (60 min), and subsequently, the heart (3 h) reperfused by releasing the ligation. Then, lipid profile, lipid peroxidation products, antioxidant enzymes and gene expression were assessed in myocardium tissue. RESULTS Only the rats that were supplemented with curcumin (10, 20 or 30 mg/kg/d) showed significant (p < 0.05) reductions in oxidative stress (3-fold), infarct size (2.5-fold), which was smaller than that of the control group. The percentage of infarct size in MIR rats with curcumin at 10, 20 or 30 mg/kg/d decreased (from 49.1% to 18.3%) compared to ischemia-reperfusion (I/R). The enhanced phosphorylation of STAT3 was further strengthened by curcumin (10, 20 or 30 mg/kg/d) in a dose-dependent manner. DISCUSSION AND CONCLUSION Curcumin intake might reduce the risk of coronary heart disease by stimulating JAK2/STAT3 signal pathway, decreasing oxidative damage and inhibiting myocardium apoptosis.
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Affiliation(s)
- HuaJin Liu
- Shanghai Tenth Clinical Medical School of Nanjing Medical University, Shanghai, China
| | | | - Zengyong Qiao
- Shanghai Tenth Clinical Medical School of Nanjing Medical University, Shanghai, China
| | - Yawei Xu
- Shanghai Tenth Clinical Medical School of Nanjing Medical University, Shanghai, China
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15
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Zhou R, Ma P, Xiong A, Xu Y, Wang Y, Xu Q. Protective effects of low-dose rosuvastatin on isoproterenol-induced chronic heart failure in rats by regulation of DDAH-ADMA-NO pathway. Cardiovasc Ther 2017; 35. [PMID: 27957828 DOI: 10.1111/1755-5922.12241] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/20/2016] [Revised: 12/01/2016] [Accepted: 12/02/2016] [Indexed: 11/26/2022] Open
Abstract
AIMS Cardiovascular disease is the leading cause of death with high morbidity and mortality, and chronic heart failure is the terminal phase of it. This study aimed to investigate the protective effects of the low-dose rosuvastatin on isoproterenol-induced chronic heart failure and to explore the possible related mechanisms. METHODS Male Sprague Dawley rats were given isoproterenol 5 mg/kg once a day for 7 days to establish heart failure model by subcutaneous injection. Simultaneously, low-dose rosuvastatin (5 mg/kg) was orally administrated from day 1 to day 14. Protective effects were evaluated by hemodynamic parameter, histopathological variables, serum asymmetric dimethylarginine (ADMA), cardiac troponin I (cTnI), brain natriuretic peptide (BNP) and myocardial nitric oxide (NO), and the levels of dimethylarginine dimethylaminohydrolase 2 (DDAH2), arginine methyltransferases 1 (PRMT1) and endothelial nitric oxide synthase (eNOS) expression were analyzed. RESULTS Therapeutic rosuvastatin (5 mg/kg) significantly attenuated isoproterenol-induced hypertrophy, remodeling and dysfunction of ventricle, reduced the increased serum content of ADMA, cTnI, and BNP, and elevated myocardial NO in rats (P<.05). Besides, rosuvastatin also significantly inhibited fibrosis of myocardium, normalized the increased PRMT1 and decreased DDAH2 expression. CONCLUSIONS Low-dose rosuvastatin exerted cardioprotective effects on isoproterenol-induced heart failure in rats by modulating DDAH-ADMA-NO pathway, and it may present the new therapeutic value in ameliorating chronic heart failure.
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MESH Headings
- Amidohydrolases/metabolism
- Animals
- Biomarkers/blood
- Cardiotonic Agents/pharmacology
- Disease Models, Animal
- Fibrosis
- Heart Failure/chemically induced
- Heart Failure/enzymology
- Heart Failure/physiopathology
- Heart Failure/prevention & control
- Hypertrophy, Left Ventricular/chemically induced
- Hypertrophy, Left Ventricular/enzymology
- Hypertrophy, Left Ventricular/physiopathology
- Hypertrophy, Left Ventricular/prevention & control
- Isoproterenol
- Male
- Myocardium/enzymology
- Myocardium/pathology
- Natriuretic Peptide, Brain/blood
- Nitric Oxide/metabolism
- Nitric Oxide Synthase Type III/metabolism
- Protein-Arginine N-Methyltransferases/metabolism
- Rats, Sprague-Dawley
- Rosuvastatin Calcium/pharmacology
- Troponin I/blood
- Ventricular Dysfunction, Left/chemically induced
- Ventricular Dysfunction, Left/enzymology
- Ventricular Dysfunction, Left/physiopathology
- Ventricular Dysfunction, Left/prevention & control
- Ventricular Function, Left/drug effects
- Ventricular Pressure/drug effects
- Ventricular Remodeling/drug effects
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Affiliation(s)
- Ru Zhou
- Department of Pharmacology, School of Pharmacy, Ningxia Medical University, Yinchuan, China
- Key Laboratory of Hui Ethnic Medicine Modernization, Ministry of Education, Ningxia Medical University, Yinchuan, China
- Ningxia Hui Medicine Modern Engineering Research Center and Collaborative Innovation Center, Ningxia Medical University, Yinchuan, China
| | - Ping Ma
- Department of Cardiology, General Hospital of Ningxia Medical University, Yinchuan, China
| | - Aiqin Xiong
- Department of Cardiology, General Hospital of Ningxia Medical University, Yinchuan, China
| | - Yehua Xu
- Department of Cardiology, General Hospital of Ningxia Medical University, Yinchuan, China
| | - Yang Wang
- Department of Cardiology, General Hospital of Ningxia Medical University, Yinchuan, China
| | - Qingbin Xu
- Department of Cardiology, General Hospital of Ningxia Medical University, Yinchuan, China
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16
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Dai W, Cheung E, Alleman RJ, Perry JB, Allen ME, Brown DA, Kloner RA. Cardioprotective Effects of Mitochondria-Targeted Peptide SBT-20 in two Different Models of Rat Ischemia/Reperfusion. Cardiovasc Drugs Ther 2017; 30:559-566. [PMID: 27747447 DOI: 10.1007/s10557-016-6695-9] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
PURPOSE Dysfunctional mitochondria are considered to be the major source of intracellular reactive oxygen species and play a central role in the pathophysiology of myocardial ischemia/reperfusion. This study sought to determine effects of mitochondria-targeted cytoprotective peptide SBT-20 on myocardial infarct size in two different models of ischemia/reperfusion. METHODS For in vivo studies, anesthetized Sprague Dawley rats were subjected to 30 min of coronary artery occlusion followed by 3 h of reperfusion. Rats received saline (control), low dose SBT-20 (0.3 mg/kg/h) or high dose SBT-20 (3 mg/kg/h) treatment (n = 15 rats in each group). Saline or SBT-20 were delivered into the jugular vein starting 5 min after coronary artery occlusion and were continued for one hour post coronary artery reperfusion. Body temperature, heart rate and blood pressure were monitored during the procedure. At the end of 3 h reperfusion, the ischemic risk area, no-reflow area, and infarct size were measured. In separate in vitro studies, isolated rat hearts were exposed to 20 min global ischemia, followed by SBT-20 administration (1 μM) or no SBT-20 (control) throughout the 2 h reperfusion. In vitro studies were conducted in cells and heart mitochondria to ascertain the mitochondrial effects of SBT-20 on mitochondrial respiration and reactive oxygen species production. RESULTS In the in vivo study, the ischemic risk areas (as a percentage of the left ventricle) were similar among the saline (49.5 ± 2.3 %), low dose SBT-20 (48.6 ± 2.1 %), and high dose SBT-20 groups (48.7 ± 3.0 %). Treatment with SBT-20 significantly reduced infarct size ( as a percentage of risk area) in low dose (62.1 ± 4.4 %) and high dose (64.0 ± 4.9 %) compared with saline treatment (77.6 ± 2.6 %, p = 0.001 for both doses). There was no difference in infarct size between low and high dose SBT-20 treatment. The no-reflow areas (as a percentage of the risk area) were comparable among the saline (23.9 ± 1.7 %), low dose SBT-20 (23.7 ± 2.8 %), and high dose groups (25.0 ± 2.1 %). Body temperature, heart rate and blood pressure were comparable among the 3 groups at baseline, during ischemia, and at the end of 3 h of reperfusion. In the in vitro study, infarct size was reduced from 43.3 ± 2.6 % in control group (n = 11) to 17.2 ± 2.8 % in the SBT-20 treatment group (n = 5, p < 0.05). There were no benefits of SBT-20 on recovery of left ventricular developed pressure, coronary flow, or maximal rates of contraction/relaxation. In cell studies, treatment with SBT-20 significantly improved maximal mitochondrial respiration in response to an H2O2 challenge. In isolated mitochondria, reactive oxygen species production was significantly blunted following treatment with SBT-20. CONCLUSIONS In summary, SBT-20 significantly reduced infarct size in two different models of myocardial injury, but did not affect hemodynamics or no-reflow area in rat heart. The reduction in injury is postulated to involve stabilization of mitochondrial function and reduced mitochondrial production of ROS.
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Affiliation(s)
- Wangde Dai
- HMRI Cardiovascular Research Institute, Huntington Medical Research Institutes, 10 Pico Street, Pasadena, CA, 91105, USA.
- Division of Cardiovascular Medicine of the Keck School of Medicine, University of Southern California, Los Angeles, California, 90017-2395, USA.
| | - Elissa Cheung
- HMRI Cardiovascular Research Institute, Huntington Medical Research Institutes, 10 Pico Street, Pasadena, CA, 91105, USA
| | - Rick J Alleman
- Department of Physiology, Brody School of Medicine, East Carolina University, Greenville, NC, 27834, USA
| | - Justin B Perry
- Department of Physiology, Brody School of Medicine, East Carolina University, Greenville, NC, 27834, USA
| | - Mitchell E Allen
- Department of Physiology, Brody School of Medicine, East Carolina University, Greenville, NC, 27834, USA
| | - David A Brown
- Department of Physiology, Brody School of Medicine, East Carolina University, Greenville, NC, 27834, USA
| | - Robert A Kloner
- HMRI Cardiovascular Research Institute, Huntington Medical Research Institutes, 10 Pico Street, Pasadena, CA, 91105, USA
- Division of Cardiovascular Medicine of the Keck School of Medicine, University of Southern California, Los Angeles, California, 90017-2395, USA
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17
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Figueroa-Valverde L, Lopez-Ramos M, Rosas-Nexticapa M, Herrera-Meza S, Diaz-Cedillo F, Garcia-Cervera E, Pool-Gomez E, Garcia-Camacho T, Aguilar-Villarino A. Experimental, Theoretical and Biological Activity of a Triazonine- Derivative on Left Ventricular Pressure. Cardiovasc Hematol Agents Med Chem 2017; 14:125-133. [PMID: 27889993 DOI: 10.2174/1871525715666161123115308] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [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: 08/05/2016] [Revised: 11/11/2016] [Accepted: 11/17/2016] [Indexed: 06/06/2023]
Abstract
BACKGROUND There are data indicating that several azonine-derivatives may exert effects on some biological systems; however, there is very low information on the biological activity induced by these compounds on left ventricular pressure. OBJECTIVE The aim of this study was to synthesize and evaluate the biological activity of new triazoninederivative on left ventricular pressure. MATERIAL AND METHODS The first stage involved: 1) preparation of two azepine-benzamide derivatives (Z or E) by reaction of the nitrobenzoyl azide with adrenosterone; and 2) reaction of (Z)-azepine-benzamide derivative with ethylenediamine to form the triazonine derivative. The structure of compounds was confirmed by spectroscopy and spectrometry data. The second stage involved the biologic activity on left ventricular pressure was evaluated in a model of rat heart isolated. In addition, some physicochemical parameters were evaluated to characterize the possible molecules involved in its effect. RESULTS The results showed that only the triazonine increased left ventricular pressure via androgen receptor. CONCLUSIONS In conclusion, this phenomenon is conditioned by the functional groups involved in the chemical structure of triazonine derivative and their interaction with residues of amino acids involved on the androgen receptor surface.
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Affiliation(s)
- Lauro Figueroa-Valverde
- Department of Pharmacochemistry, Faculty of Chemical Biological Sciences, University Autonomous of Campeche. Campeche, Mexico
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18
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Abstract
Cardiac variability can be assessed from two perspectives: beat-to-beat performance and continuous performance during the cardiac cycle. Linear analysis techniques assess cardiac variability by measuring the physical attributes of a signal, whereas nonlinear techniques evaluate signal dynamics. This study sought to determine if recurrence quantification analysis (RQA), a nonlinear technique, could detect pharmacologically induced autonomic changes in the continuous left ventricular pressure (LVP) and electrographic (EC) signals from an isolated rat heart—a model that theoretically contains no inherent variability. LVP and EC signal data were acquired simultaneously during Langendorff perfusion of isolated rat hearts before and after the addition of acetylcholine (n = 11), norepinephrine (n = 12), or no drug (n = 12). Two-minute segments of the continuous LVP and EC signal data were analyzed by RQA. Findings showed that%recurrence,%determinism, entropy, maxline, and trend from the continuous LVP signal significantly increased in the presence of both acetylcholine and norepinephrine, although systolic LVP significantly increased only with norepinephrine. In the continuous EC signal, the RQA trend variable significantly increased in the presence of norepinephrine. These results suggest that when either the sympathetic or parasympathetic division of the autonomic nervous system overwhelms the other, the dynamics underlying cardiac variability become stationary. This study also shows that information concerning inherent variability in the isolated rat heart can be gained via RQA of the continuous cardiac signal. Although speculative, RQA may be a tool for detecting alterations in cardiac variability and evaluating signal dynamics as a nonlinear indicator of cardiac pathology.
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Affiliation(s)
- Autumn M Schumacher
- Department of Physiological and Technological Nursing, School of Nursing at the Medical College of Georgia, Augusta, 30912, USA.
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19
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Abstract
Ranolazine is a selective inhibitor of the late sodium current relative to peak sodium channel current, and via this mechanism, it may decrease sodium-dependent intracellular calcium overload during ischemia and reperfusion. Ranolazine reduces the frequency of angina attacks, but there is little information on its effects on myocardial stunning after short-term ischemia. The objective of this study was to test the effects of ranolazine on left ventricular (LV) function and myocardial stunning after ischemia/reperfusion in rabbits. Myocardial stunning was induced in rabbits by 15 minutes of coronary artery occlusion (CAO) followed by 3 hours reperfusion. Ten minutes before CAO, rabbits were randomly assigned to vehicle (n = 15) or ranolazine (2 mg/kg bolus plus 60 μg/kg/min infusion, IV, n = 15). Myocardial stunning was assessed by LV 2-dimensional echocardiography using, as a marker of severity, ischemic free-wall fractional thickening (FWft; systolic wall thickness – diastolic wall thickness/diastolic wall thickness). Regional ejection fraction (EF) was also assessed. During CAO, FWft was depressed in both groups, indicating an ischemic insult (FWft was reduced from 0.62 ± 0.05 at baseline to 0.10 ± 0.04 in vehicle and from 0.73 ± 0.05 to 0.26 ± 0.07 in ranolazine, P < 0.05, ranolazine vs vehicle). After reperfusion, previously ischemic myocardium remained stunned; however, FWft recovered significantly better in ranolazine (0.51 ± 0.05) than in vehicle (0.35 ± 0.04, P = .027). Baseline EF was 0.65 ± 0.02 in the ranolazine and 0.68 ± 0.02 in vehicle ( P = ns). During CAO, EF was reduced by 36% ± 6% in vehicle versus only 20% ± 6% in ranolazine ( P < .05). At the end of reperfusion, EF remained depressed in both groups, but the reduction in the vehicle group (25% ± 5%) was significantly worse than in ranolazine (9% ± 4%, P = .017). Improvement in function was independent of necrosis (negligible) or differences in hemodynamics (no differences between groups). Ranolazine treatment reduced myocardial stunning following brief ischemia/reperfusion suggesting that inhibiting the late sodium channel current may be a novel approach to treating stunning independent of effects on hemodynamics.
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Affiliation(s)
- Sharon L Hale
- Heart Institute of Good Samaritan Hospital and the Keck School of Medicine, Division of Cardiovascular Medicine, University of Southern California, Los Angeles 90017, USA.
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Takarabe K, Okazaki Y, Higuchi S, Murayama J, Natsuaki M, Itoh T. Nicorandil Attenuates Reperfusion Injury after Long Cardioplegic Arrest. Asian Cardiovasc Thorac Ann 2016; 15:204-9. [PMID: 17540988 DOI: 10.1177/021849230701500306] [Citation(s) in RCA: 6] [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] [Indexed: 11/16/2022]
Abstract
The cardioprotective efficacy of nicorandil in cardiac surgery was determined using a surgically relevant 4-hr cardioplegic arrest model. Each isolated rabbit heart was parabiotically blood-perfused using a modified Langendorff column. The magnitude of left ventricular developed pressure and rate of change of developed pressure over time were measured before (baseline) and after ischemia. Nicorandil was administered either pre-ischemia, post-ischemia, pre/post-ischemia, or continuously (before, during, and after ischemia). The endothelium of the coronary artery was observed by scanning electron microscopy. Serum myeloperoxidase activities were also measured. Although pretreatment with nicorandil did not affect recovery of developed pressure, administration of nicorandil after ischemia, or before and after ischemia, enhanced the recovery of developed pressure. Serum myeloperoxidase activity was decreased in the pre/post-ischemia and continuous groups. Endothelial reperfusion injury decreased in all nicorandil-treated groups. Administration of nicorandil attenuated ischemia-reperfusion injury of the myocardium and coronary endothelium while ameliorating leukocyte activation. In the event of unexpected prolonged cardioplegic arrest, administration of nicorandil, even just after declamping, may improve cardiac function. However, pre-ischemia administration alone was not helpful in the heart subjected to prolonged cardioplegic arrest.
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Affiliation(s)
- Kyoumi Takarabe
- Department of Thoracic and Cardiovascular Surgery, Saga Medical School, 5-1-1 Nabeshima, Saga 849-8501, Japan
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Lin X, Chen Y, Liu Z. [Effect and its molecular mechanisms of curcumin on pulmonary artery smooth muscle cells in rat model with chronic obstructive pulmonary disease]. Zhejiang Da Xue Xue Bao Yi Xue Ban 2016; 45:469-476. [PMID: 28087906 PMCID: PMC10396843 DOI: 10.3785/j.issn.1008-9292.2016.09.04] [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: 06/06/2023]
Abstract
Objective: To investigate the effects and the underlying molecular mechanisms of curcumin on pulmonary artery smooth muscle cells in rat model with chronic obstructive pulmonary disease (COPD). Methods: A total of 75 male Wistar rats were randomly divided into control group (group CN), model group (group M), low-dose curcumin group (group CL), medium-dose curcumin group (group CM) and high-dose curcumin group (group CH). HE staining was used to observe the morphology of pulmonary artery. Proliferating cell nuclear antigen (PCNA), apoptosis-related protein Bcl-2 and Bax were detected by immunohistochemical staining. TUNEL kit was used to analyze the effects of curcumin on apoptosis of smooth muscle cells, and the protein expressions of SOCS-3/JAK2/STAT pathway in lung tissues were determined by western blot. Results: Right ventricular systolic pressure (RVSP) and right ventricular hypertrophy index (RVMI) in group M were significantly higher than those in group CN, group CH and group CM (all P<0.05). HE staining and TUNEL kit test showed that the number of pulmonary artery smooth muscle cells had a significant increase in group M, while the pulmonary artery tube became thin, and the smooth muscle cells shrinked in group CM and group CH. Immunohistochemistry showed that PCNA and Bcl-2 in group M were significantly higher than those in group CN (all P<0.05), while Bax expression was significantly lower than that in group CN (P<0.05). PCNA in group CM and group CH were significantly lower than that in group M (all P<0.05), while Bax expression was significantly higher than that in group M (P<0.05). Western blot showed that SOCS-3 protein was significantly decreased in group M, while the p-JAK2, p-STAT1, p-STAT3 were significantly increased (all P<0.05). Compared with group M, SOCS-3 protein in group CM and group CH were significantly increased (all P<0.05), while the p-JAK2, p-STAT3 were significantly reduced (all P<0.05). Conclusion: Curcumin could promote the apoptosis of smooth muscle cells in rats with COPD, and improve the mean pulmonary artery pressure and RVMI through stimulating SOCS-3/JAK2/STAT signaling pathway.
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Affiliation(s)
- Xiangang Lin
- Acupuncture Clinical Traumatology Institute, Anhui University of Chinese Medicine, Hefei 230031, China
| | - Yenong Chen
- Acupuncture Clinical Traumatology Institute, Anhui University of Chinese Medicine, Hefei 230031, China
| | - Zhuqing Liu
- Acupuncture Clinical Traumatology Institute, Anhui University of Chinese Medicine, Hefei 230031, China
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Kandhi S, Froogh G, Qin J, Luo M, Wolin MS, Huang A, Sun D. EETs Elicit Direct Increases in Pulmonary Arterial Pressure in Mice. Am J Hypertens 2016; 29:598-604. [PMID: 26304959 DOI: 10.1093/ajh/hpv148] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2015] [Accepted: 08/05/2015] [Indexed: 12/31/2022] Open
Abstract
OBJECTIVE The biological role of epoxyeicosatrienoic acids (EETs) in the regulation of pulmonary circulation is currently under debate. We hypothesized that EETs initiate increases in right ventricular systolic pressure (RVSP) via perhaps, pulmonary vasoconstriction. METHODS Mice were anesthetized with isoflurane. Three catheters, inserted into the left jugular vein, the left carotid artery, and the right jugular vein, were used for infusing EETs, monitoring blood pressure (BP), and RVSP respectively. BP and RVSP were continuously recorded at basal conditions, in response to administration of 4 regioisomeric EETs (5,6-EET; 8,9-EET; 11,12-EET, and 14,15-EET; 1, 2, 5 and 10 ng/g body weight (BW) for each EET), and during exposure of mice to hypoxia. RESULTS All 4 EETs initiated dose-dependent increases in RVSP, though reduced BP. 11,12-EET elicited the greatest increment in RVSP among all EET isoforms. To clarify the direct elevation of RVSP in a systemic BP-independent manner, equivalent amounts of 14,15-EET were injected over 1 and 2 minutes respectively. One-minute injection of 14,15-EET elicited significantly faster and greater increases in RVSP than the 2-minute injection, whereas their BP changes were comparable. Additionally, direct injection of low doses of 14,15-EET (0.1, 0.2, 0.5, and 1 ng/g BW) into the right ventricle caused significant increases in RVSP without effects on BP, confirming that systemic vasodilation-induced increases in venous return are not the main cause for the increased RVSP. Acute exposure of mice to hypoxia significantly elevated RVSP, as well as 14,15-EET-induced increases in RVSP. CONCLUSIONS EETs directly elevate RVSP, a response that may play an important role in the development of hypoxia-induced pulmonary hypertension (PH).
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MESH Headings
- 8,11,14-Eicosatrienoic Acid/administration & dosage
- 8,11,14-Eicosatrienoic Acid/analogs & derivatives
- 8,11,14-Eicosatrienoic Acid/toxicity
- Animals
- Arterial Pressure/drug effects
- Disease Models, Animal
- Dose-Response Relationship, Drug
- Hypertension, Pulmonary/chemically induced
- Hypertension, Pulmonary/physiopathology
- Hypoxia/complications
- Hypoxia/physiopathology
- Infusions, Intravenous
- Male
- Mice, Inbred C57BL
- Pulmonary Artery/drug effects
- Pulmonary Artery/physiopathology
- Time Factors
- Ventricular Function, Right/drug effects
- Ventricular Pressure/drug effects
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Affiliation(s)
- Sharath Kandhi
- Department of Physiology, New York Medical College, Valhalla, New York, New York, USA
| | - Ghezal Froogh
- Department of Physiology, New York Medical College, Valhalla, New York, New York, USA
| | - Jun Qin
- Department of Physiology, New York Medical College, Valhalla, New York, New York, USA; Renji Hospital, Shanghai Jiaotong University School of Medicine, People's Republic of China
| | - Meng Luo
- Shanghai Ninth People's Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, People's Republic of China
| | - Michael S Wolin
- Department of Physiology, New York Medical College, Valhalla, New York, New York, USA
| | - An Huang
- Department of Physiology, New York Medical College, Valhalla, New York, New York, USA
| | - Dong Sun
- Department of Physiology, New York Medical College, Valhalla, New York, New York, USA;
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23
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Rosic G, Selakovic D, Joksimovic J, Srejovic I, Zivkovic V, Tatalović N, Orescanin-Dusic Z, Mitrovic S, Ilic M, Jakovljevic V. The effects of N-acetylcysteine on cisplatin-induced changes of cardiodynamic parameters within coronary autoregulation range in isolated rat hearts. Toxicol Lett 2016; 242:34-46. [PMID: 26656795 DOI: 10.1016/j.toxlet.2015.11.028] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [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: 07/24/2015] [Revised: 11/24/2015] [Accepted: 11/26/2015] [Indexed: 11/18/2022]
Abstract
The aim of this study was to evaluate the effects of chronic NAC administration along with cisplatin on cisplatin-induced cardiotoxicity by means of coronary flow (CF), cardiodynamic parameters, oxidative stress markers and morphological changes in isolated rat heart. Isolated hearts of Wistar albino rats (divided into four groups: control, cisplatin, NAC and cisplatin+NAC group) were perfused according to Langendorff technique at constant coronary perfusion pressure starting at 50 and gradually increased to 65, 80, 95 and 110 cm H2O to evaluate cardiodynamic parameters within autoregulation range. Samples of coronary venous effluent (CVE) were collected for determination of CF and biochemical assays, and heart tissue samples for biochemical assays and histopathological examination. Cisplatin treatment decreased CF and heart rate, and increased left ventricular systolic pressure and maximum left ventricular pressure development rate. Cisplatin increased H2O2 and TBARS, but decreased NO2(-) levels in CVE. In tissue samples, cisplatin reduced pathological alterations in myocardium and coronary vessels, with no changes in the amount of total glutathione, as well as in activity of glutathione peroxidase and glutathione reductase. NAC coadministration, by reducing oxidative damage, attenuated cisplatin-induced changes of cardiodynamic and oxidative stress parameters, as well as morphological changes in myocardium and coronary vasculature.
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Affiliation(s)
- Gvozden Rosic
- Department of Physiology, Faculty of Medical Sciences, University of Kragujevac, Serbia.
| | - Dragica Selakovic
- Department of Physiology, Faculty of Medical Sciences, University of Kragujevac, Serbia.
| | - Jovana Joksimovic
- Department of Physiology, Faculty of Medical Sciences, University of Kragujevac, Serbia.
| | - Ivan Srejovic
- Department of Physiology, Faculty of Medical Sciences, University of Kragujevac, Serbia.
| | - Vladimir Zivkovic
- Department of Physiology, Faculty of Medical Sciences, University of Kragujevac, Serbia.
| | - Nikola Tatalović
- Department of Physiology, Institute for Biological Research, University of Belgrade, Serbia.
| | - Zorana Orescanin-Dusic
- Department of Physiology, Institute for Biological Research, University of Belgrade, Serbia.
| | - Slobodanka Mitrovic
- Department of Pathology, Faculty of Medical Sciences, University of Kragujevac, Serbia.
| | - Milena Ilic
- Department of Pathology, Faculty of Medical Sciences, University of Kragujevac, Serbia.
| | - Vladimir Jakovljevic
- Department of Physiology, Faculty of Medical Sciences, University of Kragujevac, Serbia.
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Abidi E, Habib J, Yassine A, Chahine N, Mahjoub T, Elkak A. Effects of methanol extracts from roots, leaves, and fruits of the Lebanese strawberry tree (Arbutus andrachne) on cardiac function together with their antioxidant activity. Pharm Biol 2015; 54:1035-1041. [PMID: 26511200 DOI: 10.3109/13880209.2015.1100638] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
CONTEXT Several plant-derived natural products have been used in clinical phase for applications in neurological, cardiovascular, and inflammatory diseases. Arbutus andrachne L. (Ericacea) is an evergreen shrub native to the Mediterranean region. Traditionally, the fruits and leaves of Arbutus tree are well known and used as antiseptics, diuretics, blood tonic, and laxatives. OBJECTIVE Data regarding the biological effects of compounds derived from the Lebanese Arbutus andrachne are not available. In the present work, we studied the antioxidant activity of methanol extracts of leaves, fruits, and roots of the plant against electrolysis; together with their effects on the cardiodynamics of isolated perfused rabbit hearts. MATERIALS AND METHODS In vitro electrolysis of the different root, leaves, and fruits methanol extracts was evaluated by the amount of free radicals that has been reduced by increasing the concentration of root extracts ranging from 0.5 to 2 mg after 1, 2, 3, and 4 min. Left ventricular pressure (LVP), heart rate (HR), and coronary flow (CR) were investigated in isolated rabbit heart after administration of 0.5, 1, 2, and 2 mg of each methanol extracts plotted against time (0, 0.5, 1.5, 5, and 10 min), according to the Langendorff method. Lipid peroxidation study was performed by the colorimetric method on myocard tissue after incubation with 500 μl of the different methanol extracts. The amount of MDA was determined at 500 nm absorbance after 5 min incubation. RESULTS Among the different methanol extracts, the roots showed the highest in vitro antioxidant activity, particularly observed at concentration of 2 mg which completely inhibits free radical generation after 4 min. LVP decreases by 32% at the dose of 2 mg of root extracts after 5 min. No significant effect was observed by the three tested extracts on the heart rate. The three methanol extracts did not show any significant effect on the coronary flow. Moreover, the roots show an increase in the coronary flow at a concentration of 1 and 2 mg/ml during 1 min. Electrolysis on heart tissue treated with the roots extracts shows a decrease in the MDA level from 70.51 ± 6.71 to 48.58 ± 4.15 nmole/g of tissue. DISCUSSION AND CONCLUSION Methanol extracts of the roots possess antihypertensive effect that may result from its ability to decrease the LVP together with its protective role by inhibiting free radical generation and significantly decreasing the MDA level of heart tissue.
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Affiliation(s)
- Emna Abidi
- a Laboratoire De Valorisation Des Ressources Naturelles Et Produits De Santé (VRNPS) , EDST, Faculty of Pharmacy, Lebanese University , Hadath , Lebanon
| | - Jean Habib
- b Laboratoire De Recherche Et Développement Des Médicaments Et Des Produits Naturels, (RDMPN) , EDST, Faculty of Pharmacy, Lebanese University , Hadath , Lebanon
| | - Ahmad Yassine
- b Laboratoire De Recherche Et Développement Des Médicaments Et Des Produits Naturels, (RDMPN) , EDST, Faculty of Pharmacy, Lebanese University , Hadath , Lebanon
| | - Nathalie Chahine
- c Laboratoire De Stress Oydatif Et Antioxidants , Faculty of Medical Sciences, Lebanese University, Rafic Hariri University Campus , Hadath , Lebanon
| | - Touhami Mahjoub
- d Human Genetics and Multifactorial Diseases, Faculty of Pharmacy , Monastir , Tunisia
| | - Assem Elkak
- a Laboratoire De Valorisation Des Ressources Naturelles Et Produits De Santé (VRNPS) , EDST, Faculty of Pharmacy, Lebanese University , Hadath , Lebanon
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Vardar SA, Palabiyik O, Topuz RD, Gürel EE, Çalişkan S, Topçu Özen S, Süt N, Karadağ ÇH. Hemodynamic effects of atrial natriuretic peptide in ischemia-repertusion injury that occurs after exercise. Turk J Med Sci 2015; 45:298-305. [PMID: 26084118 DOI: 10.3906/sag-1307-42] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022] Open
Abstract
BACKGROUND/AIM Atrial natriureticpeptide (ANP) is known as a protective agent against ischemia-reperfusion injuryfor cardiomyocytes. We compared the hemodynamic effects of ANP and isatin, which is known as an ANP receptor blocker, in ischemia followed by reperfusion in exercised rat hearts with nonexercised ones. MATERIALS AND METHODS Isolated hearts were perfused in 4 exercised (E) groups after a running protocol for 5 days and 4 nonexercised (NE) groups. In the first protocol, ANP was added to the perfusion solution before ischemia in an E and NE group. In the second protocol, different doses of isatin (0.1, 10, 100 µM/L) were added to the perfusion solution before ANP in 3 E and 3 NE groups. Left ventricular developed pressure (LVDP) and maximum and minimum rates of change in left ventricular pressure (dP/dtmax and dP/dtmin) were recorded. RESULTS Higher LVDP and dP/dtmin values were observed in the E group than the NE group following addition of ANP before ischemia. Values of dP/dtmax were higher in the E group at the first minute of reperfusion period. Hemodynamic difference was not observed between groups given the same amount of isatin before ANP. CONCLUSION This study indicated that higher ANP concentrations before ischemia were more effective on the left ventricle contractility and relaxation functions in the hearts that were exposed to exercise.
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D'Armini AM, Ghofrani HA, Kim NH, Mayer E, Morsolini M, Pulido-Zamudio T, Simonneau G, Wilkins MR, Curram J, Davie N, Hoeper MM. Use of responder threshold criteria to evaluate the response to treatment in the phase III CHEST-1 study. J Heart Lung Transplant 2015; 34:348-55. [PMID: 25813765 DOI: 10.1016/j.healun.2015.02.003] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [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: 10/23/2014] [Revised: 02/10/2015] [Accepted: 02/11/2015] [Indexed: 02/07/2023] Open
Abstract
BACKGROUND In the Chronic Thromboembolic Pulmonary Hypertension Soluble Guanylate Cyclase - Stimulator Trial 1 (CHEST-1) study, riociguat improved 6-minute walking distance (6MWD) vs placebo in patients with inoperable chronic thromboembolic pulmonary hypertension or persistent/recurrent pulmonary hypertension after pulmonary endarterectomy. In this study, the proportion of patients who achieved responder thresholds that correlate with improved outcome in patients with pulmonary arterial hypertension was determined at baseline and at the end of CHEST-1. METHODS Patients received placebo or riociguat individually adjusted up to 2.5 mg 3 times a day for 16 weeks. Response criteria were defined as follows: 6MWD increase ≥40 m, 6MWD ≥380 m, cardiac index ≥2.5 liters/min/m(2), pulmonary vascular resistance <500 dyn∙sec∙cm(-5), mixed venous oxygen saturation ≥65%, World Health Organization functional class I/II, N-terminal pro-brain natriuretic peptide <1,800 pg/ml, and right atrial pressure <8 mm Hg. RESULTS Riociguat increased the proportion of patients with 6MWD ≥380 m, World Health Organization functional class I/II, and pulmonary vascular resistance <500 dyn∙sec∙cm(-5) from 37%, 34%, and 25% at baseline to 58%, 57%, and 50% at Week 16, whereas there was little change in placebo-treated patients (6MWD ≥380 m, 43% vs 44%; World Health Organization functional class I/II, 29% vs 38%; pulmonary vascular resistance <500 dyn∙sec∙cm(-5), 27% vs 26%). Similar changes were observed for thresholds for cardiac index, mixed venous oxygen saturation, N-terminal pro-brain natriuretic peptide, and right atrial pressure. CONCLUSIONS In this exploratory analysis, riociguat increased the proportion of patients with inoperable chronic thromboembolic pulmonary hypertension or persistent/recurrent pulmonary hypertension after pulmonary endarterectomy achieving criteria defining a positive response to therapy.
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Affiliation(s)
- Andrea M D'Armini
- Division of Cardiothoracic Surgery, Foundation "I.R.C.C.S. Policlinico San Matteo," University of Pavia School of Medicine, Pavia, Italy.
| | - Hossein-Ardeschir Ghofrani
- University of Giessen and Marburg Lung Center, UGMLC, Giessen, Germany, member of the German Center of Lung Research (DZL); Department of Medicine, Imperial College London, London, United Kingdom
| | - Nick H Kim
- Division of Pulmonary and Critical Care Medicine, University of California San Diego School of Medicine, San Diego, California
| | - Eckhard Mayer
- Kerckhoff Heart and Lung Center, Bad Nauheim, Germany
| | - Marco Morsolini
- Division of Cardiothoracic Surgery, Foundation "I.R.C.C.S. Policlinico San Matteo," University of Pavia School of Medicine, Pavia, Italy
| | | | - Gerald Simonneau
- Assistance Publique-Hôpitaux de Paris, Service de Pneumologie, Hôpital Bicêtre, Université Paris-Sud, Laboratoire d'Excellence en Recherche sur le Médicament et Innovation Thérapeutique, and INSERM Unité 999, Le Kremlin-Bicêtre, France
| | - Martin R Wilkins
- National Institute for Health Research/Wellcome Trust Imperial Clinical Research Facility, Imperial Centre for Translational and Experimental Medicine, Imperial College London, London, United Kingdom
| | - John Curram
- Global Development, Bayer plc, Newbury, United Kingdom
| | - Neil Davie
- Global Clinical Development, Bayer Pharma AG, Wuppertal, Germany
| | - Marius M Hoeper
- Clinic for Respiratory Medicine, Hannover Medical School, Hannover, Germany, and Member of the German Centre of Lung Research (DZL)
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Abstract
An 84-year-old woman diagnosed with hypertrophic obstructive cardiomyopathy (HOCM) was referred to our hospital due to chest pain associated with an increased level of troponin T. Following the administration of cibenzoline, the left ventricular outflow pressure gradient (LVPG) completely disappeared. Left ventricular pressure pullback tracing subsequently demonstrated the "reappearance" of the LVPG. Left ventriculography showed apical ballooning with excessive contractions at the base of heart, and we therefore made a diagnosis of Takotsubo cardiomyopathy in a patient with HOCM. Hypercontractions of the base of the heart associated with Takotsubo cardiomyopathy may be responsible for the "reappearance" of LVPG in this case.
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Fernandez-Fernandez A, Carvajal DA, Lei T, McGoron AJ. Chemotherapy-induced changes in cardiac capillary permeability measured by fluorescent multiple indicator dilution. Ann Biomed Eng 2014; 42:2405-15. [PMID: 25224075 DOI: 10.1007/s10439-014-1110-9] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2014] [Accepted: 09/05/2014] [Indexed: 11/30/2022]
Abstract
Anthracyclines cause severe irreversible cardiac toxicity. The study of changes in cardiac permeability with chemotherapy could enhance the understanding of mechanisms behind cardiac damage, and provide useful information to evaluate anthracycline cardiotoxicity. Thirty-six rats (12 Sprague-Dawley, 12 Wistar, 12 Fischer-344) were randomly assigned to control (n = 21) or doxorubicin (n = 15), and injected i.p. with a cumulative dose of 18 mg/kg doxorubicin in saline (vehicle) or vehicle alone over 12 days. Echocardiography was performed at baseline and on day 11. An isolated heart experiment was done on day 12 to obtain perfused heart pressure values, and to measure cardiac capillary permeability using a Texas Red/sodium fluorescein multiple indicator dilution method. Control animals had significantly lower average permeability-surface-area-products (0.035 ± 0.013 cm(3)/s) than doxorubicin animals (0.066 ± 0.023 cm(3)/s), PSP ± SD, p < 0.001. These permeability changes correlated with significant functional changes. There was a significant decline in cardiac function with a deleterious effect of chemotherapy on fractional shortening (p < 0.001), left ventricular developed pressure (p < 0.001), contractility (p < 0.001), and relaxation (p = 0.02). Based on our results, cardiac capillary permeability changes can be detected after in vivo chemotherapy treatment using our fluorescent multiple indicator dilution technique, and may provide valuable information in evaluating cardiotoxicity of novel drugs.
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Affiliation(s)
- Alicia Fernandez-Fernandez
- Biomedical Engineering Department, Florida International University, 10555 W. Flagler St., EC 2600, Miami, FL, 33174, USA
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Guo K, Lan CZ, Yu TT, Huang LL, Wang XH, Pan C, Gao S. Effects of Xin-Ji-Er-Kang formula on 2K1C-induced hypertension and cardiovascular remodeling in rats. J Ethnopharmacol 2014; 155:1227-1235. [PMID: 25063306 DOI: 10.1016/j.jep.2014.07.006] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [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: 04/07/2014] [Revised: 06/04/2014] [Accepted: 07/04/2014] [Indexed: 06/03/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Xin-Ji-Er-Kang (XJEK), a Chinese herbal formula, is effective against hypertension induced coronary heart disease, viral myocarditis and toxic myocarditis. In this study, the effect of XJEK on cardiovascular system was investigated. To test the hypothesis that Xin-Ji-Er-Kang (XJEK) has an anti-hypertensive effect mediated through attenuation of cardiac remodeling, and amelioration of vascular endothelial dysfunction and oxidative stress. MATERIALS AND METHODS Hypertension was induced in Wistar rats by 2 kidney 1 clip (2K1C) treatment. The hypertensive rats were then randomly assigned into four groups and treated as follows: group 1 (Sham-operated [Sh-Op] group received only drinking water), group 2 (induced hypertensive model+no treatment), and group 3 (induced hypertensive+a single daily oral dose of 24 g kg(-1) XJEK treatment) and group 4 (induced hypertensive+a single oral dose of 15 mg kg(-1) Fosinopril treatment). The rats in all the defined groups were respectively treated for a period of 4 weeks. Cardiovascular parameter such as systolic blood pressure (SBP) was measured weekly by using tail-cuff apparatus; left ventricular systolic pressure (LVSP), left ventricular end-diastolic pressure (LVEDP) and the rate of the rise in left ventricular pressure (±dp/dt max) were measured by using a PowerLab 8/30 apparatus (AD Instruments, Australia) at the end of the 8th week; heart weight/body weight (HW/BW) was determined as an index of myocardial hypertrophy (MH). Hematoxylin and eosin (H&E) and Van Gieson (VG) stain were used to assess the cardio-histological changes. Colorimetric analysis was used to assay serum superoxide dismutase (SOD) activity, malondialdehyde (MDA), nitric oxide (NO), and hydroxyproline (Hyp) contents in cardiac tissue. Angiotensin II (Ang II) content in serum was assessed by radioimmunoassay; tetrahydrobiopterin (BH4) content in cardiac tissue, BNP and endothelial NOS (eNOS) in serum were determined by using ELISA, and the protein expressions of c-Jun NH2-terminal kinase (JNK), P-JNK, p38, P-p38, and NADPH oxidases-2 (Nox-2) were measured by western blot. RESULTS XJEK therapy could impair the heart systolic and diastolic function, potently improve the heart weight index, inhibit the elevation of HW/BW ratio, and markedly ameliorate hemodynamic indices and vascular remodeling index. It has blunted the decrease of SOD, NO and the increase in MDA and Ang II serum contents, myocardial cross-section area (CSA), collagen volume fraction (CVF) and perivascular circumferential collagen area (PVCA) compared to the hypertensive model group. It also reduced the serum content of Hyp while increased BH4 levels in cardiac tissue. In addition, the expressions of Nox-2, P-JNK and P-p38MAPK were all suppressed compared to the hypertensive model group. Moreover, treatment with XJEK improved endothelial dysfunction (ED) manifested by promoting eNOS activities and enhancing the NO activity in serum. CONCLUSION The results of the present study show that XJEK attenuates 2K1C-induced hypertension in rats, which confirms our hypothesis that XJEK has an anti-hypertensive and cardiovascular remodeling effect via attenuation of cardiac remodeling and improvement of endothelial dysfunction and oxidative stress.
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Affiliation(s)
- Kun Guo
- Department of Pharmacology, Key Laboratory of Antiinflammation and Immunopharmacology of Ministry of Education, Basic Medical College, Anhui Medical University, Hefei 230032, China
| | - Chao-zong Lan
- College of Pharmacy, Anhui University of Traditional Chinese Medicine, Hefei 230031, China
| | - Ting-ting Yu
- Department of Pharmacology, Key Laboratory of Antiinflammation and Immunopharmacology of Ministry of Education, Basic Medical College, Anhui Medical University, Hefei 230032, China
| | - Ling-ling Huang
- Department of Pharmacology, Key Laboratory of Antiinflammation and Immunopharmacology of Ministry of Education, Basic Medical College, Anhui Medical University, Hefei 230032, China
| | - Xing-hui Wang
- Department of Pharmacy, the Second People׳s Hospital of Hefei City, Hefei 230011, China
| | - Chen Pan
- Department of Clinical Medicine, Lishui People׳s Hospital, Zhe Jiang 323000, China
| | - Shan Gao
- Department of Pharmacology, Key Laboratory of Antiinflammation and Immunopharmacology of Ministry of Education, Basic Medical College, Anhui Medical University, Hefei 230032, China.
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Tonelli AR, Conci D, Tamarappoo BK, Newman J, Dweik RA. Prognostic value of echocardiographic changes in patients with pulmonary arterial hypertension receiving parenteral prostacyclin therapy. J Am Soc Echocardiogr 2014; 27:733-741.e2. [PMID: 24780356 DOI: 10.1016/j.echo.2014.03.012] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/31/2013] [Indexed: 02/01/2023]
Abstract
BACKGROUND It is unknown whether the echocardiographic changes observed after treatment of patients with pulmonary arterial hypertension have prognostic value. METHODS Subjects with pulmonary arterial hypertension, confirmed by right heart catheterization, who underwent Doppler echocardiography before (baseline) and after 1 year of treatment (follow-up) with parenteral prostacyclin analogues were retrospectively identified. Echocardiographic parameters were measured offline by two investigators. RESULTS A total of 48 patients were included (mean age, 45 ± 14 years; 83% women). Compared with baseline, follow-up echocardiography showed reductions in right atrial area (mean percentage change, 12 ± 25%; P < .001), right ventricular (RV) basal and middle cavity dimensions (mean percentage change, 8.5 ± 14% [P < .001] and 6.8 ± 17% [P = .005], respectively), and peak tricuspid regurgitant velocity (mean percentage change, 10 ± 14%; P < .001). Tricuspid annular plane systolic excursion (mean percentage change, 36 ± 43%; P < .001) and RV outflow tract time-velocity integral (mean percentage change, 48 ± 66%; P < .001) increased. During a median follow-up period of 52.5 months (interquartile range, 20.5-80 months), 18 patients (37.5%) died, mostly (n = 15 [83%]) from progression of pulmonary arterial hypertension. The changes in RV end-diastolic area (hazard ratio [HR per 10% decrease, 0.73; 95% confidence interval [CI], 0.57-0.93), tricuspid valve regurgitation velocity (HR per 10 cm/sec decrease, 0.58; 95% CI, 0.37-0.89), RV outflow tract velocity-time integral (HR per 10% increase, 0.90; 95% CI, 0.83-0.98), and subjective RV function (HR per 1 unit of improvement [e.g., from moderate to mild], 0.55; 95% CI, 0.31-0.96) were associated with overall mortality. CONCLUSIONS Echocardiographic parameters that estimate RV systolic pressure and assess RV morphology and function improve after 1 year of prostacyclin analogue treatment, and the degree of change has prognostic implications.
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Affiliation(s)
- Adriano R Tonelli
- Department of Pulmonary, Allergy and Critical Care Medicine, Respiratory Institute, Cleveland Clinic, Cleveland, Ohio.
| | - Diego Conci
- Department of Pulmonary, Allergy and Critical Care Medicine, Respiratory Institute, Cleveland Clinic, Cleveland, Ohio
| | - Balaji K Tamarappoo
- Department of Cardiovascular Medicine, Heart and Vascular Institute, Cleveland Clinic, Cleveland, Ohio
| | - Jennie Newman
- Department of Pulmonary, Allergy and Critical Care Medicine, Respiratory Institute, Cleveland Clinic, Cleveland, Ohio
| | - Raed A Dweik
- Department of Pulmonary, Allergy and Critical Care Medicine, Respiratory Institute, Cleveland Clinic, Cleveland, Ohio
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Stuckey DJ, McSweeney SJ, Thin MZ, Habib J, Price AN, Fiedler LR, Gsell W, Prasad SK, Schneider MD. T₁ mapping detects pharmacological retardation of diffuse cardiac fibrosis in mouse pressure-overload hypertrophy. Circ Cardiovasc Imaging 2014; 7:240-9. [PMID: 24425501 DOI: 10.1161/circimaging.113.000993] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
BACKGROUND Diffuse interstitial fibrosis is present in diverse cardiomyopathies and associated with poor prognosis. We investigated whether magnetic resonance imaging-based T1 mapping could quantify the induction and pharmacological suppression of diffuse cardiac fibrosis in murine pressure-overload hypertrophy. METHODS AND RESULTS Mice were subjected to transverse aortic constriction or sham surgery. The angiotensin receptor blocker losartan was given to half the animals. Cine-magnetic resonance imaging performed at 7 and 28 days showed hypertrophy and remodeling and systolic and diastolic dysfunction in transverse aortic constriction groups as expected. Late gadolinium-enhanced magnetic resonance imaging revealed focal signal enhancement at the inferior right ventricular insertion point of transverse aortic constriction mice concordant with the foci of fibrosis in histology. The extracellular volume fraction, calculated from pre- and postcontrast T1 measurements, was elevated by transverse aortic constriction and showed direct linear correlation with picrosirius red collagen volume fraction, thus confirming the suitability of extracellular volume fraction as an in vivo measure of diffuse fibrosis. Treatment with losartan reduced left ventricular dysfunction and prevented increased extracellular volume fraction, indicating that T1 mapping is sensitive to pharmacological prevention of fibrosis. CONCLUSIONS Magnetic resonance imaging can detect diffuse and focal cardiac fibrosis in a clinically relevant animal model of pressure overload and is sensitive to pharmacological reduction of fibrosis by angiotensin receptor blockade. Thus, T1 mapping can be used to assess antifibrotic therapeutic strategies.
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Affiliation(s)
- Daniel J Stuckey
- British Heart Foundation Centre of Research Excellence, National Heart and Lung Institute
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Revermann M, Neofitidou S, Kirschning T, Schloss M, Brandes RP, Hofstetter C. Inhalation of the BK(Ca)-opener NS1619 attenuates right ventricular pressure and improves oxygenation in the rat monocrotaline model of pulmonary hypertension. PLoS One 2014; 9:e86636. [PMID: 24497961 PMCID: PMC3909005 DOI: 10.1371/journal.pone.0086636] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2013] [Accepted: 12/11/2013] [Indexed: 01/09/2023] Open
Abstract
BACKGROUND Right heart failure is a fatal consequence of chronic pulmonary hypertension (PH). The development of PH is characterized by increased proliferation of vascular cells, in particular pulmonary artery smooth muscle cells (PASMCs) and pulmonary artery endothelial cells. In the course of PH, an escalated right ventricular (RV) afterload occurs, which leads to increased perioperative morbidity and mortality. BK(Ca) channels are ubiquitously expressed in vascular smooth muscle cells and their opening induces cell membrane hyperpolarization followed by vasodilation. Moreover, BK activation induces anti-proliferative effects in a multitude of cell types. On this basis, we hypothesized that treatment with the nebulized BK channel opener NS1619 might be a therapy option for pulmonary hypertension and tested this in rats. METHODS (1) Rats received monocrotaline injection for PH induction. Twenty-four days later, rats were anesthetized and NS1619 or the solvent was administered by inhalation. Systemic hemodynamic parameters, RV hemodynamic parameters, and blood gas analyses were measured before as well as 30 and 120 minutes after inhalation. (2) Rat PASMCs were stimulated with PDGF-BB in the presence and absence of NS1619. AKT, ERK1 and ERK2 activation were investigated by western blot analyses, and relative cell number was determined 48 hours after stimulation. RESULTS Inhalation of a 12 µM and 100 µM NS1619 solution significantly reduced RV pressure without affecting systemic arterial pressure. Blood gas analyses demonstrated significantly reduced carbon dioxide and improved oxygenation in NS1619-treated animals pointing towards a considerable pulmonary shunt-reducing effect. In PASMC's, NS1619 (100 µM) significantly attenuated PASMC proliferation by a pathway independent of AKT and ERK1/2 activation. CONCLUSION NS1619 inhalation reduces RV pressure and improves oxygen supply and its application inhibits PASMC proliferation in vitro. Hence, BK opening might be a novel option for the treatment of pulmonary hypertension.
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MESH Headings
- Administration, Inhalation
- Animals
- Becaplermin
- Benzimidazoles/administration & dosage
- Benzimidazoles/pharmacology
- Blotting, Western
- Cell Proliferation/drug effects
- Cells, Cultured
- Hemodynamics/drug effects
- Hypertension, Pulmonary/chemically induced
- Hypertension, Pulmonary/physiopathology
- Hypertension, Pulmonary/prevention & control
- Large-Conductance Calcium-Activated Potassium Channels/metabolism
- Male
- Mitogen-Activated Protein Kinase 1/metabolism
- Mitogen-Activated Protein Kinase 3/metabolism
- Monocrotaline
- Myocytes, Smooth Muscle/drug effects
- Myocytes, Smooth Muscle/metabolism
- Oxygen/metabolism
- Proto-Oncogene Proteins c-akt/metabolism
- Proto-Oncogene Proteins c-sis/pharmacology
- Pulmonary Artery/cytology
- Rats
- Rats, Sprague-Dawley
- Ventricular Dysfunction, Right/physiopathology
- Ventricular Dysfunction, Right/prevention & control
- Ventricular Pressure/drug effects
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Affiliation(s)
- Marc Revermann
- Department of Anesthesiology and Critical Care Medicine, University Hospital Mannheim, Faculty of Medicine, University of Heidelberg, Heidelberg, Germany
- Institute for Cardiovascular Physiology, Medical Faculty of the Goethe-University Frankfurt, Frankfurt, Germany
| | - Skevi Neofitidou
- Department of Anesthesiology and Critical Care Medicine, University Hospital Mannheim, Faculty of Medicine, University of Heidelberg, Heidelberg, Germany
| | - Thomas Kirschning
- Department of Anesthesiology and Critical Care Medicine, University Hospital Mannheim, Faculty of Medicine, University of Heidelberg, Heidelberg, Germany
| | - Manuel Schloss
- Institute for Cardiovascular Physiology, Medical Faculty of the Goethe-University Frankfurt, Frankfurt, Germany
| | - Ralf P. Brandes
- Institute for Cardiovascular Physiology, Medical Faculty of the Goethe-University Frankfurt, Frankfurt, Germany
| | - Christian Hofstetter
- Department of Anesthesiology and Critical Care Medicine, University Hospital Mannheim, Faculty of Medicine, University of Heidelberg, Heidelberg, Germany
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Takeshita D, Tanaka M, Mitsuyama S, Yoshikawa Y, Zhang GX, Obata K, Ito H, Taniguchi S, Takaki M. A new calpain inhibitor protects left ventricular dysfunction induced by mild ischemia-reperfusion in in situ rat hearts. J Physiol Sci 2013; 63:113-23. [PMID: 23242912 PMCID: PMC10717469 DOI: 10.1007/s12576-012-0243-6] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [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: 09/18/2012] [Accepted: 11/25/2012] [Indexed: 10/27/2022]
Abstract
We have previously indicated that a new soluble calpain inhibitor, SNJ-1945 (SNJ), attenuates cardiac dysfunction after cardioplegia arrest-reperfusion by inhibiting the proteolysis of α-fodrin in in vitro study. Nevertheless, the in vivo study design is indispensable to explore realistic therapeutic approaches for clinical use. The aim of the present in situ study was to investigate whether SNJ attenuated left ventricular (LV) dysfunction (stunning) after mild ischemic-reperfusion (mI-R) in rat hearts. SNJ (60 μmol/l, 5 ml i.p.) was injected 30 min before gradual and partial coronary occlusion at proximal left anterior descending artery. To investigate LV function, we obtained curvilinear end-systolic pressure-volume relationship by increasing afterload 60 min after reperfusion. In the mI-R group, specific LV functional indices at midrange LV volume (mLVV), end-systolic pressure (ESP(mLVV)), and pressure-volume area (PVA(mLVV): a total mechanical energy per beat, linearly related to oxygen consumption) significantly decreased, but SNJ reversed these decreases to time control level. Furthermore, SNJ prevented the α-fodrin degradation and attenuated degradation of Ca(2+) handling proteins after mI-R. Our results indicate that improvements in LV function following mI-R injury are associated with inhibition of the proteolysis of α-fodrin in in situ rat hearts. In conclusion, SNJ should be a promising tool to protect the heart from the stunning.
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Affiliation(s)
- D. Takeshita
- Department of Physiology II, Nara Medical University School of Medicine, 840 Shijo-cho, Kashihara, Nara 634-8521 Japan
| | - M. Tanaka
- Department of Physiology II, Nara Medical University School of Medicine, 840 Shijo-cho, Kashihara, Nara 634-8521 Japan
- Faculty of Health Care Science, Himeji Dokkyo University, Himeji, Japan
| | - S. Mitsuyama
- Department of Physiology II, Nara Medical University School of Medicine, 840 Shijo-cho, Kashihara, Nara 634-8521 Japan
| | - Y. Yoshikawa
- Department of Thoracic and Cardiovascular Surgery, Nara Medical University, Nara, Japan
| | - G. -X. Zhang
- Department of Physiology II, Nara Medical University School of Medicine, 840 Shijo-cho, Kashihara, Nara 634-8521 Japan
- Department of Physiology, Medical College of Soochow University, Dushu Lake Campus, Suzhou Industrial Park, Suzhou, 215123 People’s Republic of China
| | - K. Obata
- Department of Physiology II, Nara Medical University School of Medicine, 840 Shijo-cho, Kashihara, Nara 634-8521 Japan
| | - H. Ito
- Department of Physiology II, Nara Medical University School of Medicine, 840 Shijo-cho, Kashihara, Nara 634-8521 Japan
| | - S. Taniguchi
- Department of Thoracic and Cardiovascular Surgery, Nara Medical University, Nara, Japan
| | - Miyako Takaki
- Department of Physiology II, Nara Medical University School of Medicine, 840 Shijo-cho, Kashihara, Nara 634-8521 Japan
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Liu CC, Huang Y, Zhang JH, Xu Y, Wu CH. Effect of carvedilol on cardiac dysfunction 4 days after myocardial infarction in rats: role of toll-like receptor 4 and β-arrestin 2. Eur Rev Med Pharmacol Sci 2013; 17:2103-2110. [PMID: 23884833] [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] [Grants] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
OBJECTIVES To assess the beneficial effect of carvedilol treatment on infarct myocardium and the relation to the expression of nuclear factor-kappa B (NF-κB), Toll-like receptor 4 (TLR4), and β-arrestin 2. MATERIALS AND METHODS Rat myocardial infarction (MI) model was produced by ligating the left anterior descending coronary artery. Forty-eight rats were randomized to the following groups before surgery: sham-operated group (n=8), MI group (n=10), and three carvedilol-treatment groups (n=30, 2 mg/kg, 10 mg/kg and 30 mg/kg). RESULTS Four days after MI, carvedilol treatment could ameliorate left ventricular dysfunction by inhibiting the MI-induced increase of left ventricular end diastolic pressure and the decrease of left ventricle end systolic pressure and the changes to their maximum rates (+dp/dtmax and -dp/dtmax). Histological examination showed that carvedilol attenuated myocardium necrosis and inflammatory cell infiltration. In parallel, the treatment also suppressed the expression of NF-κB and TLR4 induced by MI, but increased the expression of β-arrestin 2. CONCLUSIONS These results indicate that short term administration of carvedilol could improve early cardiac dysfunction in a rat model of MI. This beneficial effect may be attributed to inhibit the expression of NF-κB and TLR4, but induce the expression of β-arrestin 2 in the infarct region of the myocardium, which would suppress inflammation.
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Affiliation(s)
- C-C Liu
- Department of Cardiology, the First Affiliated Hospital of Anhui Medical University, Hefei, PR China.
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Zapata-Sudo G, Pontes LB, da Silva JS, Lima LM, Nunes IKDC, Barreiro EJ, Sudo RT. Benzenesulfonamide attenuates monocrotaline-induced pulmonary arterial hypertension in a rat model. Eur J Pharmacol 2012; 690:176-82. [PMID: 22728079 DOI: 10.1016/j.ejphar.2012.05.043] [Citation(s) in RCA: 9] [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: 11/22/2011] [Revised: 05/16/2012] [Accepted: 05/24/2012] [Indexed: 11/26/2022]
Abstract
In this study, we examined the effects of LASSBio-965 (N-[2-(3,4-dimethoxyphenyl) ethyl]-benzenesulfonamide), a compound designed as a simplified structure of a non-selective phosphodiesterase 4 inhibitor, on vascular smooth muscle in vitro as well as in a rat model of monocrotaline (MCT)-induced pulmonary arterial hypertension. LASSBio-965 (50 mg/kg) treatment caused a significant decrease in right systolic ventricular pressure (32.47 ± 3.09 mmHg) compared to the MCT-vehicle group (51.88 ± 3.23 mmHg; P<0.05) and in the ratio of right ventricular weight to left ventricular weight plus septum (0.42 ± 0.03 g compared to 0.59 ± 0.06 g, respectively; MCT-vehicle group; P<0.05). LASSBio-965 induced a concentration-dependent relaxation of rat aortic rings, which was decreased by mechanical removal of the endothelium. Milrinone, rolipram, and sildenafil reduced the maximum relaxation (100%) to 22.4 ± 5.8, 69.5 ± 5.6 and 80.1 ± 10.7%, respectively (P<0.05). Maximum relaxation responses of aortic and pulmonary artery rings were decreased in the MCT-vehicle group (54.80 ± 5.69 and 35.87 ± 4.78, respectively) compared to the control (91.51 ± 4.79 and 54.32 ± 2.39, respectively) but improved with LASSBio-965 treatment (50mg/kg; 88.43 ± 4.54 and 59.36 ± 4.83, respectively). These results indicate that LASSBio-965 can attenuate the pulmonary arterial hypertension in an animal model most likely through the nonselective inhibition of phosphodiesterases 3, 4, and 5.
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Affiliation(s)
- Gisele Zapata-Sudo
- Programa de Pós-Graduação em Farmacologia e Química Medicinal, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil.
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Kulpa J, Chinnappareddy N, Pyle WG. Rapid changes in cardiac myofilament function following the acute activation of estrogen receptor-alpha. PLoS One 2012; 7:e41076. [PMID: 22859967 PMCID: PMC3408454 DOI: 10.1371/journal.pone.0041076] [Citation(s) in RCA: 19] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2011] [Accepted: 06/21/2012] [Indexed: 11/19/2022] Open
Abstract
Estrogens have well-recognized and complex cardiovascular effects, including altering myocardial contractility through changes in myofilament function. The presence of multiple estrogen receptor (ER) isoforms in the heart may explain some discrepant findings about the cardiac effects of estrogens. Most studies examining the impact of estrogens on the heart have focused on chronic changes in estrogen levels, and have not investigated rapid, non-genomic pathways. The first objective of this study was to determine how acute activation of ERα impacts cardiac myofilaments. Nongenomic myocardial estrogen signaling is associated with the activation of a variety of signaling pathways. p38 MAPK has been implicated in acute ER signaling in the heart, and is known to affect myofilament function. Thus, the second objective of this study was to determine if acute ERα activation mediates its myofilament effects through p38 MAPK recruitment. Hearts from female C57Bl/6 mice were perfused with the ERα agonist PPT and myofilaments isolated. Activation of ERα depressed actomyosin MgATPase activity and decreased myofilament calcium sensitivity. Inhibition of p38 MAPK attenuated the myofilament effects of ERα activation. ERα stimulation did not affect global myofilament protein phosphorylation, but troponin I phosphorylation at the putative PKA phosphorylation sites was decreased. Changes in myofilament activation did not translate into alterations in whole heart function. The present study provides evidence supporting rapid, non-genomic changes in cardiac myofilament function following acute ERα stimulation mediated by the p38 MAPK pathway.
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Affiliation(s)
- Justyna Kulpa
- Cardiovascular Research Group, Department of Biomedical Sciences, Ontario Veterinary College, University of Guelph, Guelph, Ontario, Canada
| | - Nirmala Chinnappareddy
- Cardiovascular Research Group, Department of Biomedical Sciences, Ontario Veterinary College, University of Guelph, Guelph, Ontario, Canada
| | - W. Glen Pyle
- Cardiovascular Research Group, Department of Biomedical Sciences, Ontario Veterinary College, University of Guelph, Guelph, Ontario, Canada
- Biophysics Interdepartmental Group, University of Guelph, Guelph, Ontario, Canada
- * E-mail:
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Borgdorff MAJ, Bartelds B, Dickinson MG, Boersma B, Weij M, Zandvoort A, Silljé HHW, Steendijk P, de Vroomen M, Berger RMF. Sildenafil enhances systolic adaptation, but does not prevent diastolic dysfunction, in the pressure-loaded right ventricle. Eur J Heart Fail 2012; 14:1067-74. [PMID: 22730335 DOI: 10.1093/eurjhf/hfs094] [Citation(s) in RCA: 56] [Impact Index Per Article: 4.7] [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] [Indexed: 11/12/2022] Open
Abstract
AIM Right ventricular (RV) failure due to pressure or volume overload is a major risk factor for early mortality in congenital heart disease and pulmonary hypertension, but currently treatments are lacking. We aimed to demonstrate that the phosphodiesterase 5A inhibitor sildenafil can prevent adverse remodelling and improve function in chronic abnormal RV overload, independent from effects on the pulmonary vasculature. METHODS AND RESULTS In rat models of either pressure or volume overload, we performed pressure-volume studies to measure haemodynamic effects and voluntary exercise testing as clinical outcome after 4 weeks of sildenafil (or vehicle) administration. In the pressure-loaded right ventricle, sildenafil enhanced contractility [end-systolic elastance (mmHg/mL) 247 ± 68 vs.155 ± 71, sildenafil vs. vehicle, P < 0.05], prevented RV dilatation [end-diastolic volume (μL) 733 ± 50 vs. 874 ± 39, P < 0.05], reduced wall stress [peak wall stress (mmHg) 323 ± 46 vs. 492 ± 62, P < 0.05], and partially preserved exercise tolerance [running distance (%) -33 ± 15 vs. -62 ± 12, P < 0.05]. Protein kinase A was not activated by sildenafil and thus did not mediate the observed effects. In contrast, protein kinase G-1 was activated by sildenafil, but hypertrophy was not inhibited. Importantly, sildenafil did not prevent diastolic dysfunction, whereas RV fibrosis appeared to be increased in sildenafil-treated rats. In the volume-loaded right ventricle, sildenafil treatment did not show any beneficial effects. CONCLUSION We demonstrate sildenafil to have beneficial, afterload-independent effects on the pressure-loaded right ventricle, but not on the volume-loaded right ventricle. These results indicate that sildenafil may offer a specific treatment for the pressure-loaded right ventricle, although persistent diastolic dysfunction and RV fibrosis could be of concern.
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Affiliation(s)
- Marinus A J Borgdorff
- Center for Congenital Heart Diseases, Division of Pediatric Cardiology, Beatrix Children's Hospital, University of Groningen, University Medical Center Groningen, 9713 AV Groningen, The Netherlands.
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Gao S, Huang LL, Wang XH, Yu TT, Du SM, Guo YW. [Effects of Xinjierkang on two kidney one clip-induced hypertension and target organ injury in rats]. Zhong Yao Cai 2012; 35:591-595. [PMID: 23019907] [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: 06/01/2023]
Abstract
OBJECTIVE To investigate the effects of Xinjierkang on two kidney one clip -induced hypertension and target organ injury in rats. METHODS Two kidney one clip-induced hypertension rats model was established. Rats were divided into control group, model group, Xinjierkang group, and fosinopril group. At the end of 8th w, the hemodynamics indexes were recorded. The cardiac hypertrophy index was expressed as heart weight/body weight (HW/BW), the histological changes of heart, aorta and kidney were investigated by HE and/or Van Gieson stain. RESULTS Compared with control group, the heart systolic and diastolic function were impaired, the heart weight index, cardiomyocytes cross section area (CSA), cardiac collagen deposition, vascular remodeling index and glomerulus area were increased markedly in model group rats. Administration of Xinjierkang and fosinopril markedly ameliorated hemodynamic indexes, inhibited the elevation of HW/BW ratio, CSA of cardiomyocytes, vascular remodeling index and glomerulus hypertrophy, decreased collagen deposition in heart. CONCLUSION Xinjierkang has protective effects against two kidney one clip-induced hemodynamic impairment, cardiovascular remodeling and glomerulus hypertrophy in rats.
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Affiliation(s)
- Shan Gao
- Department of Pharmacology, College of Basic Medical, Anhui Medical University, Hefei 230032, China.
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Sahara M, Sata M, Morita T, Hirata Y, Nagai R. Nicorandil attenuates monocrotaline-induced vascular endothelial damage and pulmonary arterial hypertension. PLoS One 2012; 7:e33367. [PMID: 22479390 PMCID: PMC3316574 DOI: 10.1371/journal.pone.0033367] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2011] [Accepted: 02/13/2012] [Indexed: 11/19/2022] Open
Abstract
Background An antianginal KATP channel opener nicorandil has various beneficial effects on cardiovascular systems; however, its effects on pulmonary vasculature under pulmonary arterial hypertension (PAH) have not yet been elucidated. Therefore, we attempted to determine whether nicorandil can attenuate monocrotaline (MCT)-induced PAH in rats. Materials and Methods Sprague-Dawley rats injected intraperitoneally with 60 mg/kg MCT were randomized to receive either vehicle; nicorandil (5.0 mg·kg−1·day−1) alone; or nicorandil as well as either a KATP channel blocker glibenclamide or a nitric oxide synthase (NOS) inhibitor Nω-nitro-l-arginine methyl ester (l-NAME), from immediately or 21 days after MCT injection. Four or five weeks later, right ventricular systolic pressure (RVSP) was measured, and lung tissue was harvested. Also, we evaluated the nicorandil-induced anti-apoptotic effects and activation status of several molecules in cell survival signaling pathway in vitro using human umbilical vein endothelial cells (HUVECs). Results Four weeks after MCT injection, RVSP was significantly increased in the vehicle-treated group (51.0±4.7 mm Hg), whereas it was attenuated by nicorandil treatment (33.2±3.9 mm Hg; P<0.01). Nicorandil protected pulmonary endothelium from the MCT-induced thromboemboli formation and induction of apoptosis, accompanied with both upregulation of endothelial NOS (eNOS) expression and downregulation of cleaved caspase-3 expression. Late treatment with nicorandil for the established PAH was also effective in suppressing the additional progression of PAH. These beneficial effects of nicorandil were blocked similarly by glibenclamide and l-NAME. Next, HUVECs were incubated in serum-free medium and then exhibited apoptotic morphology, while these changes were significantly attenuated by nicorandil administration. Nicorandil activated the phosphatidylinositol 3-kinase (PI3K)/Akt and extracellular signal-regulated kinase (ERK) pathways in HUVECs, accompanied with the upregulation of both eNOS and Bcl-2 expression. Conclusions Nicorandil attenuated MCT-induced vascular endothelial damage and PAH through production of eNOS and anti-apoptotic factors, suggesting that nicorandil might have a promising therapeutic potential for PAH.
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MESH Headings
- Animals
- Antihypertensive Agents/administration & dosage
- Antihypertensive Agents/pharmacology
- Apoptosis/drug effects
- Blotting, Western
- Caspase 3/metabolism
- Cells, Cultured
- Drug Therapy, Combination
- Endothelium, Vascular/drug effects
- Endothelium, Vascular/pathology
- Enzyme Inhibitors/administration & dosage
- Enzyme Inhibitors/pharmacology
- Familial Primary Pulmonary Hypertension
- Glyburide/administration & dosage
- Glyburide/pharmacology
- Human Umbilical Vein Endothelial Cells/drug effects
- Human Umbilical Vein Endothelial Cells/metabolism
- Humans
- Hypertension, Pulmonary/chemically induced
- Hypertension, Pulmonary/physiopathology
- Hypertension, Pulmonary/prevention & control
- Injections, Intraperitoneal
- MAP Kinase Signaling System/drug effects
- Male
- Monocrotaline/toxicity
- NG-Nitroarginine Methyl Ester/administration & dosage
- NG-Nitroarginine Methyl Ester/pharmacology
- Nicorandil/administration & dosage
- Nicorandil/pharmacology
- Phosphatidylinositol 3-Kinases/metabolism
- Proto-Oncogene Proteins c-akt/metabolism
- Random Allocation
- Rats
- Rats, Sprague-Dawley
- Signal Transduction/drug effects
- Ventricular Pressure/drug effects
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Affiliation(s)
- Makoto Sahara
- Department of Cardiovascular Medicine, University of Tokyo Graduate School of Medicine, Tokyo, Japan.
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Lakomkin VL, Kapel'ko VI. [The similarity and difference in the action of adriamycin and hydrogen peroxide on the myocardium]. Ross Fiziol Zh Im I M Sechenova 2012; 98:250-257. [PMID: 22650069] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
The oxidative stress in cardiomyocytes is a component of cardiotoxic action of adriamycin. To distinguish the importance of this component we have compared initial effects of hydrogen peroxide and adriamycin on the contractile function and a tone of coronary vessels of the isolated rat heart. Adriamycin in concentration 3 mcM distinctly reduced developed pressure and heart rate, but raised coronary vessel tone. The concentration 1 mcM was inefficient at usual perfusion rate, but practically prevented rise in developed pressure and rates of its rise and fall at increased perfusion rate. Hydrogen peroxide also dose-dependently reduced developed pressure, but rates of its rise and fall were reduced to a lesser degree, while the heart rate slightly raised, and coronary vessel tone was reduced. Thus, the initial actions of hydrogen peroxide and adriamycin on the heart considerably differ. It suggests that the oxidative stress is not the main component of cardiotoxic action of adriamycin, at least, in its application in concentrations close to therapeutic ones.
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Hwa JS, Jin YC, Lee YS, Ko YS, Kim YM, Shi LY, Kim HJ, Lee JH, Ngoc TM, Bae KH, Kim YS, Chang KC. 2-methoxycinnamaldehyde from Cinnamomum cassia reduces rat myocardial ischemia and reperfusion injury in vivo due to HO-1 induction. J Ethnopharmacol 2012; 139:605-615. [PMID: 22179023 DOI: 10.1016/j.jep.2011.12.001] [Citation(s) in RCA: 63] [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] [Subscribe] [Scholar Register] [Received: 04/28/2011] [Revised: 10/17/2011] [Accepted: 12/02/2011] [Indexed: 05/31/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Cinnamomum cassia Blume has been used as a traditional Chinese herbal medicine for alleviation of fever, inflammation, chronic bronchitis, and to improve blood circulation. AIM OF THE STUDY We addressed whether 2-methoxycinnamaldehyde (2-MCA), one of active ingredients of Cinnamomum cassia, reduces vascular cell adhesion molecule-1 (VCAM-1) expression in tumor necrosis factor-alpha (TNF-α)-activated endothelial cells and protects ischemia/reperfusion (I/R)-injury due to heme oxygenase (HO)-1 induction. MATERIALS AND METHODS Adult male rats were subjected to 30 min of ischemia by occlusion of the left anterior descending coronary artery followed by 24h of reperfusion. Rats were randomized to receive vehicle or 2-MCA (i.v.) 10 min before reperfusion. RESULTS Administration of 2-MCA significantly improved I/R-induced myocardial dysfunction by increasing the values of the first derivative (±dp/dt) of left ventricular pressure and decreased infarct size. In addition, 2-MCA reduced the expression of high mobility group box 1 (HMGB1), an activator of the inflammatory cascade when released into the extracellular space, and VCAM-1 in I/R myocardium along with increase of HO-1 induction. The reduced injury was accompanied by significantly reduction of neutrophils infiltration and increased SOD activity in ischemic tissues and reduced serum level of cardiac troponin I (cTnI). Furthermore, 2-MCA significantly increased HO-1 induction by translocation of Nrf-2 from cytosol to nucleus in endothelial cells. Inhibition of VCAM-1 expression by 2-MCA was reversed both by SnPPIX, a HO-1 inhibitor and siHO-1 RNA trasfection in TNF-α-activated cells. In addition, 2-MCA significantly inhibited NF-κB luciferase activity in TNF-α-activated endothelial cells. As expected, 2-MCA significantly inhibited monocyte (U937) adhesion to endothelial cells. CONCLUSION We concluded that 2-MCA protects of myocardial I/R-injury due to antioxidant and anti-inflammatory action possibly by HO-1 induction which can be explained why Cinnamomum cassia has been used in inflammatory disorders.
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Affiliation(s)
- Jeong Seok Hwa
- Department of Urology, School of Medicine, Gyeongsang National University, Jinju, Republic of Korea
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Zhou R, He LF, Li YJ, Shen Y, Chao RB, Du JR. Cardioprotective effect of water and ethanol extract of Salvia miltiorrhiza in an experimental model of myocardial infarction. J Ethnopharmacol 2012; 139:440-446. [PMID: 22138518 DOI: 10.1016/j.jep.2011.11.030] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/19/2011] [Revised: 10/24/2011] [Accepted: 11/17/2011] [Indexed: 05/31/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Salvia miltiorrhiza has long been used in the traditional Chinese formulations for the treatment of heart ischemic diseases. AIM OF THE STUDY We investigated the cardioprotective effect of purified Salvia miltiorrhiza extract (SME) in an experimental model of acute myocardial infarction. MATERIALS AND METHODS Following induction of acute myocardial infarction in rats by adminstration of isoproterenol, hemodynamic and electrocardiographic parameters were monitored and recorded continuously, cardiac enzymes and parameters of oxidative stress were measured, and histopathological examination of heart tissue was performed. Experiments were performed in rats treated with SME or vehicle, as well as in those treated with Fufang Danshen Tablet (FDT) as a positive control which has previously been shown to prevent myocardial ischemia. RESULTS Isoproterenol-treated rats showed reductions in left ventricular systolic pressure as well as in maximum and minimum rate of developed left ventricular pressure, together with an increase in left ventricular end-diastolic pressure. They also demonstrated ST-segment elevation, together with increases in serum levels of lactate dehydrogenase, glutamic oxalacetic transaminase, creatine kinase and malondialdehyde, as well as decreases in serum activities of glutathione peroxidase and superoxide dismutase. Oral administration of SME (29.76 or 59.52 mg/kg) blunted all of the hemodynamic and biochemical changes induced by isoproterenol, as did FDT (1210 mg/kg). The protective effect of SME on isoproterenol-induced myocardial damage was further confirmed by histopathological examination. CONCLUSIONS Our results suggest that SME affords protection against isoproterenol-induced myocardial infarction.
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Affiliation(s)
- Ru Zhou
- Department of Pharmacology and Biopharmaceutics, Key Laboratory of Drug Targeting and Drug Delivery Systems Ministry of Education, West China School of Pharmacy, Sichuan University, Chengdu, China
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Calkins H. Use of mouse models to evaluate novel therapeutic approaches to treatment of arrhythmogenic right ventricular cardiomyopathy the future is now. J Am Coll Cardiol 2011; 57:751-2. [PMID: 21292135 DOI: 10.1016/j.jacc.2010.09.043] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/14/2010] [Accepted: 09/21/2010] [Indexed: 11/18/2022]
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Zhang C, Gu YP, Yuan BP, Liu Y, Guo W, Wei HC, Lv R. [Protective effects of Leonurus japonicas on myocardial remodeling induced by isoproterenol in rats]. Zhong Yao Cai 2011; 34:1399-1402. [PMID: 22260010] [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: 05/31/2023]
Abstract
OBJECTIVE To investigate the effects of Leonurus japonicas on myocardial remodeling induced by isoproterenol (ISO) in rats. METHODS The model of rat myocardial remodeling was established by subcutaneous injection of ISO (20,10 and 5 mg/kg for 3 days, subsequently 3 mg/kg for 7 days). Rats were randomly divided into five groups: Control, ISO, ISO + enalapril, ISO + Leonurus 8 g/ kg and ISO + Leonurus 16 g/kg. Recorded the values of LVSP, LVEDP, +/- dp/dt (max), cardiac output ( CO). Weighed the body weight (BW), heart weight (HW) and left ventricular weight (LVW) of rats to calculate the values of HW/BW and LVW/BW. The hydroxyproline contents were investigated by spectrophotometric measurement. The contents of type I collagen and type III collagen and ratio of I/III collagen were assessed by immunohistochemical stain. RESULTS Leonurus (16 g/kg x day(-1)) could increased the value of LVSP, + dp/dt(max), CO (P < 0.05). Leonurus (8 g/kg) could increased the value of -dp/dt(max), decreased the ratios of HW/BW and LVW/BW (P < 0.05), the contents of hydroxyproline, type I collagen, type III collagen and the ratios of I/III collagen (P < 0.05). CONCLUSIONS Leonurus at a dosage of 16 g/kg may improve the systolic function; Leonurus at a dosage of 8 g/kg may improve the diastolic function, down-regulate the expression of collagen and normalize the ratio of I/III collagen.
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Affiliation(s)
- Chen Zhang
- Department of Pathology, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, China.
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Mo X, Zhao N, Du X, Bai L, Liu J. The protective effect of peony extract on acute myocardial infarction in rats. Phytomedicine 2011; 18:451-457. [PMID: 21112198 DOI: 10.1016/j.phymed.2010.10.003] [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] [Received: 04/14/2010] [Revised: 07/20/2010] [Accepted: 10/05/2010] [Indexed: 05/30/2023]
Abstract
To investigate the protective effects, and the mechanisms involved, of an extract of the medicinal herb radix paeoniae rubra (PE) on cardiovascular disease, acute myocardial infarction (AMI) was induced by ligation of the left coronary artery in Sprague Dawley rats. Animals were randomly divided into six groups: control, sham-operated, AMI, AMI+PE low dose, AMI+PE high dose, and AMI+positive control. Myocardial enzymes, cytokines, oxidative stress, blood coagulation times, a marker for early stage apoptosis, caspase-3 activity, and expression levels of bax, bcl-2 and fas in isolated primary cardiomyocytes were examined. In contrast with control and sham groups, significant increases in the following parameters were measured in the blood of AMI group animals: activities of cardiac enzymes including glutamic oxaloacetic transaminase, creatine kinase, creatine kinase-MB, lactate dehydrogenase, α-hydroxybutyric dehydrogenase, and levels of IL-10, TNFα, and lipid peroxidation. Under the same conditions, superoxide dismutase activity, thrombin time and activated partial thromboplastin time decreased significantly. PE showed a dose-dependent protection against AMI-induced alterations in cardiac enzymes, cytokines, oxidative stress, and coagulation. In AMI cardiomyocytes, compared with control and sham groups, the left ventricular end-diastolic pressure, early stage apoptosis, caspase-3 activity and expression levels of bax, bcl-2 and fas significantly increased, while the ratio bcl-2/bax decreased. PE showed dose-dependent protection. These results suggest that PE is an effective agent for protecting against AMI; possible mechanisms may include the regulation of cardiac enzymes, cytokines, oxidative stress, coagulation and apoptosis.
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Affiliation(s)
- Xiaoyan Mo
- Department of Biological Science and Engineering, Institute of Mitochondrial Biology and Medicine, The Key Laboratory of Biomedical Information Engineering of Ministry of Education, Xi'an Jiaotong University School of Life Science and Technology, Xi'an 710049, China.
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Ziberna L, Lunder M, Moze S, Vanzo A, Tramer F, Passamonti S, Drevensek G. Acute cardioprotective and cardiotoxic effects of bilberry anthocyanins in ischemia-reperfusion injury: beyond concentration-dependent antioxidant activity. Cardiovasc Toxicol 2011; 10:283-94. [PMID: 20978867 DOI: 10.1007/s12012-010-9091-x] [Citation(s) in RCA: 61] [Impact Index Per Article: 4.7] [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] [Indexed: 11/26/2022]
Abstract
Despite being reported to reduce the risk of cardiovascular diseases, little is known about acute direct effects of bilberry anthocyanins on whole mammalian heart under ischemia-reperfusion (I-R) conditions. Bilberry anthocyanins were prepared from the ripe bilberries and analyzed using HPLC-DAD. Their antioxidant activity was evaluated by measuring the intrinsic free radical-scavenging capacity and by cellular antioxidant assay (CAA) on endothelial cells, where we quantified the intracellular capacity to inhibit the formation of peroxyl radicals. Experiments on the isolated rat hearts under I-R were carried out according to the Langendorff method. Perfusion with low concentrations of bilberry anthocyanins (0.01-1 mg/L) significantly attenuated the extent of I-R injury as evidenced by decreasing the release rate of LDH, increasing the postischemic coronary flow, and by decreasing the incidence and duration of reperfusion arrhythmias. High concentrations (5-50 mg/L) diminished cardioprotection and show cardiotoxic activity despite having their radical scavenging and intracellular antioxidant capabilities increased in a concentration-dependent manner. This study reveals the biphasic concentration-dependent bioactivity of bilberry anthocyanins under I-R, which results in strong cardioprotective activity in low concentrations and cardiotoxic activity in high concentrations.
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Affiliation(s)
- Lovro Ziberna
- Institute of Pharmacology and Experimental Toxicology, Faculty of Medicine, University of Ljubljana, Korytkova 2, 1000 Ljubljana, Slovenia.
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Liu P, Wang X, Zhou S, Hua X, Liu Z, Gao Y. Effects of a novel ultrasound contrast agent with long persistence on right ventricular pressure: Comparison with SonoVue. Ultrasonics 2011; 51:210-214. [PMID: 20825961 DOI: 10.1016/j.ultras.2010.07.008] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/31/2010] [Revised: 07/15/2010] [Accepted: 07/22/2010] [Indexed: 05/29/2023]
Abstract
This work investigated the effect of infusion of a self-made ultrasound contrast agent with long persistence (named ZHIFUXIAN) on rat right ventricular pressure and made a preliminary evaluation on the relative safety of the novel microbubbles. Normal saline, SonoVue and ZHIFUXIAN were injected through caudal vein at the total volume of 0.5ml for each injection. The right ventricular systolic pressure (RVSP) and end-diastolic pressure (RVEDP) were monitored and the changes of the pressure were compared with baseline readings. RVSP increased when saline, SonoVue or ZHIFUXIAN were injected, the greatest change being after SonoVue (about 2mmHg), but there was no statistical significance compared with baseline (P>0.05). There was no significant difference in RVSP between saline, SonoVue and ZHIFUXIAN at any time point. Also, there was no significant difference in RVEDP between groups at each time point and between different time points in each group. The results indicate that the self-made microbubbles effect on right ventricular hemodynamics is equivalent to that of normal saline at the same volume needed for effective enhanced imaging, demonstrating that it does not produce changes in right ventricular blood pressure under the study conditions. Pathological examination also showed it had no obvious influence on lung, liver and kidney.
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Affiliation(s)
- Ping Liu
- Department of Ultrasound, Xinqiao Hospital of the Third Military Medical University, Chongqing 400037, China
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Baldo MP, Zaniqueli D, Forechi L, Machado RC, Rodrigues SL, Mill JG. Effects of spironolactone in spontaneously hypertensive adult rats subjected to high salt intake. Clinics (Sao Paulo) 2011; 66:477-82. [PMID: 21552676 PMCID: PMC3072011 DOI: 10.1590/s1807-59322011000300020] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/12/2010] [Accepted: 11/17/2010] [Indexed: 12/31/2022] Open
Abstract
OBJECTIVE To evaluate the effect of spironolactone on ventricular stiffness in spontaneously hypertensive adult rats subjected to high salt intake. INTRODUCTION High salt intake leads to cardiac hypertrophy, collagen accumulation and diastolic dysfunction. These effects are partially mediated by cardiac activation of the renin-angiotensin-aldosterone system. METHODS Male spontaneously hypertensive rats (SHRs, 32 weeks) received drinking water (SHR), a 1% NaCl solution (SHR-Salt), or a 1% NaCl solution with a daily subcutaneous injection of spironolactone (80 mg.kg⁻¹) (SHRSalt- S). Age-matched normotensive Wistar rats were used as a control. Eight weeks later, the animals were anesthetized and catheterized to evaluate left ventricular and arterial blood pressure. After cardiac arrest, a double-lumen catheter was inserted into the left ventricle through the aorta to obtain in situ left ventricular pressure-volume curves. RESULTS The blood pressures of all the SHR groups were similar to each other but were different from the normotensive controls (Wistar = 109 ± 2; SHR = 118 ± 2; SHR-Salt = 117 ± 2; SHR-Salt-S = 116 ± 2 mmHg; P < 0.05). The cardiac hypertrophy observed in the SHR was enhanced by salt overload and abated by spironolactone (Wistar = 2.90 ± 0.06; SHR = 3.44 ± 0.07; SHR-Salt = 3.68 ± 0.07; SHR-Salt-S = 3.46 ± 0.05 mg/g; P < 0.05). Myocardial relaxation, as evaluated by left ventricular dP/dt, was impaired by salt overload and improved by spironolactone (Wistar = -3698 ± 92; SHR = -3729 ± 125; SHR-Salt = -3342 ± 80; SHR-Salt-S = -3647 ± 104 mmHg/s; P < 0.05). Ventricular stiffness was not altered by salt overload, but spironolactone treatment reduced the ventricular stiffness to levels observed in the normotensive controls (Wistar = 1.40 ± 0.04; SHR = 1.60 ± 0.05; SHR-Salt = 1.67 ± 0.12; SHR-Salt- S = 1.45 ± 0.03 mmHg/ml; P < 0.05). CONCLUSION Spironolactone reduces left ventricular hypertrophy secondary to high salt intake and ventricular stiffness in adult SHRs.
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Affiliation(s)
- Marcelo Perim Baldo
- Department of Physiological Sciences, Federal University of Espirito Santo, Vitoria, ES, Brazil.
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Imura H, Lin H, Griffiths EJ, Suleiman MS. Controlled hyperkalemic reperfusion with magnesium rescues ischemic juvenile hearts by reducing calcium loading. J Thorac Cardiovasc Surg 2010; 141:1529-37. [PMID: 21168858 DOI: 10.1016/j.jtcvs.2010.09.048] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [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: 06/23/2010] [Revised: 08/17/2010] [Accepted: 09/02/2010] [Indexed: 11/18/2022]
Abstract
OBJECTIVES Our objectives were (1) to determine whether elevated Mg(2+) in controlled hyperkalemic reperfusate without intervention during ischemia protects the juvenile heart against reperfusion injury; and (2) to identify the mechanism(s) underlying any protective effect of Mg(2+). METHODS Langendorff-perfused hearts from juvenile (11- to 14-day-old) guinea pigs were subjected to mild (30-minute) or severe (45-minute) normothermic global ischemia and 35-minute reperfusion. Hearts were subjected to controlled hyperkalemic reperfusion without or with various concentrations of Mg(2+) (5, 10, 16, 23 mM). The mechanisms underlying the effect of Mg(2+) on intracellular Ca(2+) ([Ca(2+)]i) were also studied in isolated cardiomyocytes exposed to metabolic inhibition followed by washout using hyperkalemic solutions (reperfusion). RESULTS Sixteen mM Mg(2+) conferred maximal cardioprotection as assessed by improved functional recovery and reduced cardiac injury; this was associated with a significant recovery of cardiac energetics and metabolism following both mild and severe ischemia. The Mg(2+)-induced protection was additive to that of hyperkalemia following mild ischemia and conferred protection following severe ischemia when hyperkalemia alone had no significant effect. Elevated Mg(2+) in the hyperkalemic reperfusate of cardiomyocytes acutely prevented [Ca(2+)]i loading following mild metabolic inhibition and augmented the fall in [Ca(2+)]i following severe metabolic inhibition. CONCLUSIONS This work demonstrates for the first time in juvenile hearts that elevated Mg(2+) during controlled hyperkalemic reperfusion rescues the heart following ischemia, and that this is likely to be facilitated by reducing [Ca(2+)]i which, in turn, would aid metabolic recovery.
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Affiliation(s)
- Hajime Imura
- Department of Surgery 2, Nippon Medical School, Bunkyo-ku, Tokyo, Japan
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Zuo YM, Gao S, Cao JF, Liu XY, Yu HJ, Zhang Y. [Effects of oligomeric grape seed proanthocyanidins on isoproterenol-induced cardiac remodeling in rats]. Yao Xue Xue Bao 2010; 45:565-570. [PMID: 20931756] [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: 05/30/2023]
Abstract
The purpose of this study is to evaluate the effect of oligomeric grape seed proanthocyanidins (GSP) on isoproterenol (ISO)-induced cardiac remodeling in rats. ISO was given subcutaneously (5 mg x kg(-1), sc, 7 days) to induce cardiac remodeling in rats. Therapeutic groups were given GSP (50, 100, and 150 mg x kg(-1)) after ISO treatment. After 2 weeks intervention, heart rate (HR), left ventricular systolic pressure (LVSP), left ventricular end-diastolic pressure (LVEDP), rate of rise of left ventricular pressure (+/- dp/dt(max)) were examined. The myocardial hypertrophy index was expressed as heart weight/body weight (HW/BW) and left ventricle weight/body weight (LVW/BW), the histological changes were investigated by HE and Van Gieson stain. SOD activity and MDA content in serum, contents of hydroxyproline (Hyp) in the left ventricular tissue were assayed by xanthinoxidase method, thiobarbituric acid (TBA) method and alkaline hydrolysis method, respectively. After the onset of ISO-treatment, GSP therapy potently improved cardiac function, inhibited myocardial hypertrophy, improved cardiac pathology change, decreased the myocardial cross-section area (CSA), collagen volume fraction (CVF) and perivascular circumferential collagen area (PVCA), reduced the content of Hyp in the left ventricular tissue, inhibited the decrease of SOD activity and increase of MDA content in serum. GSP possess protective effect against ISO induced cardiac remodeling in rats, this may be related to reducing the oxidative stress and improving antioxidant capacity.
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Affiliation(s)
- You-Mei Zuo
- Department of Anesthesiology, the Second Affiliated Hospital of Anhui Medical University, Hefei 230601, China
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