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Bernak-Oliveira Â, Guizoni DM, Chiavegatto S, Davel AP, Rossoni LV. The protective role of neuronal nitric oxide synthase in endothelial vasodilation in chronic β-adrenoceptor overstimulation. Life Sci 2021; 285:119939. [PMID: 34506836 DOI: 10.1016/j.lfs.2021.119939] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2021] [Revised: 08/27/2021] [Accepted: 09/02/2021] [Indexed: 01/12/2023]
Abstract
AIMS Nitric oxide synthases (NOSs) are key enzymes regulating vascular function. Previously, we reported that β-adrenergic (β-AR) overstimulation, a common feature of cardiovascular diseases, did not impair endothelium-dependent vasodilation, although it resulted in endothelial NOS (eNOS) uncoupling and reduced NO bioavailability. In addition to NO, neuronal NOS (nNOS) produces H2O2, which contributes to vasodilation. However, there is limited information regarding vascular β-AR signaling and nNOS. In the present study, we assessed the possible role of nNOS-derived H2O2 and caveolins on endothelial vasodilation function following β-AR overstimulation. MAIN METHODS Male C57BL/6 wild-type and nNOS knockout mice (nNOS-/-) were treated with the β-AR agonist isoproterenol (ISO, 15 mg·kg-1·day-1, s.c.) or vehicle (VHE) for seven days. Relaxation responses of aortic rings were evaluated using wire myograph and H2O2 by Amplex Red. KEY FINDINGS Acetylcholine- or calcium ionophore A23187-induced endothelium-dependent relaxation was similar in aortic rings from VHE and ISO. However, this relaxation was significantly reduced in aortas from ISO compared to VHE when (1) caveolae were disrupted, (2) nNOS was pharmacologically inhibited or genetically suppressed and (3) H2O2 was scavenged. NOS-derived H2O2 production was higher in the aortas of ISO mice than in those of VHE mice. Aortas from ISO-treated mice showed increased expression of caveolin-1, nNOS and catalase, while caveolin-3 expression did not change. SIGNIFICANCE The results suggest a role of caveolin-1 and the nNOS/H2O2 vasodilatory pathway in endothelium-dependent relaxation following β-AR overstimulation and reinforce the protective role of nNOS in cardiovascular diseases associated with high adrenergic tone.
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Affiliation(s)
- Ângelo Bernak-Oliveira
- Department of Physiology and Biophysics, Institute of Biomedical Sciences (ICB), University of Sao Paulo (USP), Brazil
| | - Daniele M Guizoni
- Department of Structural and Functional Biology, Institute of Biology (IB), University of Campinas (UNICAMP), Campinas, Sao Paulo, Brazil
| | - Silvana Chiavegatto
- Department of Pharmacology, Institute of Biomedical Sciences (ICB), University of Sao Paulo (USP), Brazil; Department of Psychiatry, Institute of Psychiatry (IPq), University of Sao Paulo Medical School (FMUSP), Sao Paulo, Brazil
| | - Ana P Davel
- Department of Structural and Functional Biology, Institute of Biology (IB), University of Campinas (UNICAMP), Campinas, Sao Paulo, Brazil.
| | - Luciana V Rossoni
- Department of Physiology and Biophysics, Institute of Biomedical Sciences (ICB), University of Sao Paulo (USP), Brazil.
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Rosuvastatin and retinoic acid may act as 'pleiotropic agents' against β-adrenergic agonist-induced acute myocardial injury through modulation of multiple signalling pathways. Chem Biol Interact 2020; 318:108970. [PMID: 32007421 DOI: 10.1016/j.cbi.2020.108970] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2019] [Revised: 01/18/2020] [Accepted: 01/29/2020] [Indexed: 12/26/2022]
Abstract
Cardiovascular disorders constitute the principal cause of deaths worldwide and will continue as the major disease-burden by the year 2060. A significant proportion of heart failures occur because of use and misuse of drugs and most of the investigational agents fail to achieve any clinical relevance. Here, we investigated rosuvastatin and retinoic acid for their "pharmacological pleiotropy" against high dose β-adrenergic agonist (isoproterenol)-induced acute myocardial insult. Rats were pretreated with rosuvastatin and/or retinoic acid for seven days and the myocardial injury was induced by administering isoproterenol on the seventh and eighth day. After induction, rats were anaesthetized for electrocardiography, then sacrificed and different samples were collected/stored for various downstream assays. Myocardial injury with isoproterenol resulted in increased cardiac mass, decreased R-wave amplitude, increased QRS and QT durations; elevated levels of cardiac markers like cTnI, CK-MB, ALT and AST; increased lipid peroxidation, protein carbonylation and tissue nitric oxide levels; decreased endogenous antioxidants like SOD, CAT, GR, GST, GPx and total antioxidant activity; increased inflammatory markers like TNF-α and IL-6; decreased the mRNA expression of Nrf2 and Bcl-2; increased the mRNA expression of Bax, eNOS and iNOS genes. Pretreatment with rosuvastatin and/or retinoic acid mitigated many of the above biochemical and pathological alterations. Our results demonstrate that rosuvastatin and retinoic acid exert cardioprotective effects and may act as potential agents in the prevention of β-adrenergic agonist-induced acute myocardial injury in rats. Cardioprotective potential of rosuvastatin and retinoic acid could be attributed to their influence on the redox pathways, immunomodulation, membrane stability, Nrf2 preservation, iNOS and Bax expression levels. Thus, they may act directly or indirectly at various steps, the breakpoints, in the pathophysiological cascade responsible for cardiac injury. Our study gives insights about the pharmacological pleiotropism of rosuvastatin and retinoic acid.
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3
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Satheesh NJ, Uehara Y, Fedotova J, Pohanka M, Büsselberg D, Kruzliak P. TRPV currents and their role in the nociception and neuroplasticity. Neuropeptides 2016; 57:1-8. [PMID: 26825374 DOI: 10.1016/j.npep.2016.01.003] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/21/2015] [Revised: 01/11/2016] [Accepted: 01/11/2016] [Indexed: 01/11/2023]
Abstract
Transient receptor potential channels sensitive to vanilloids (TRPVs) are group of ion channels which are sensitive to various tissue damaging signals and their activation is generally perceived as pain. Therefore, they are generally named as nociceptors. Understanding their activation and function as well as their interaction with intracellular pathways is crucial for the development of pharmacological interference in order to reduce pain perception. The current review summarizes basic facts in regard to TRPV and discusses their relevance in the sensing of (pain-) signals and their intracellular processing, focussing on their modulation of the intracellular calcium ([Ca(2+)]i) signal. Furthermore we discuss the basic mechanisms how the modification of [Ca(2+)]i through TRPV might induce long-term-potentiation (LTP) or long-term- depression (LTD) and from "memories" of pain. Understanding of these mechanisms is needed to localize the best point of interference for pharmacological treatment. Therefore, high attention is given to highlight physiological and pathological processes and their interaction with significant modulators and their roles in neuroplasticity and pain modulation.
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Affiliation(s)
| | - Yoshio Uehara
- Division of Clinical Nutrition, Faculty of Home Economics, Kyoritsu Women's University, Tokyo, Japan
| | - Julia Fedotova
- Laboratory of Neuroendocrinology, I.P. Pavlov Institute of Physiology, Russian Academy of Sciences, St. Petersburg, Russia
| | - Miroslav Pohanka
- Faculty of Military Health Sciences, University of Defence, Hradec Kralove, Czech Republic
| | - Dietrich Büsselberg
- Weill Cornell Medicine in Qatar, Qatar Foundation - Education City, Doha, Qatar
| | - Peter Kruzliak
- Department of Pharmacology and Toxicology, Faculty of Pharmacy, Comenius University, Bratislava, Slovak Republic; Laboratory of Structural Biology and Proteomics, Faculty of Pharmacy, University of Veterinary and Pharmaceutical Sciences, Brno, Czech Republic; 2(nd) Department of Internal Medicine, Faculty of Medicine, Masaryk University, Brno, Czech Republic.
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4
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Jankyova S, Rubintova D, Janosikova L, Panek P, Foltanova T, Kralova E. The Effects of Pycnogenol® as Add-on Drug to Metformin Therapy in Diabetic Rats. Phytother Res 2016; 30:1354-61. [DOI: 10.1002/ptr.5639] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2016] [Revised: 04/14/2016] [Accepted: 04/18/2016] [Indexed: 12/29/2022]
Affiliation(s)
- Stanislava Jankyova
- Department of Pharmacology and Toxicology; Comenius University in Bratislava, Faculty of Pharmacy; Slovak Republic
| | - Dominika Rubintova
- Department of Pharmacology and Toxicology; Comenius University in Bratislava, Faculty of Pharmacy; Slovak Republic
| | - Lenka Janosikova
- Department of Pharmacology and Toxicology; Comenius University in Bratislava, Faculty of Pharmacy; Slovak Republic
| | - Peter Panek
- Department of Pharmacology and Toxicology; Comenius University in Bratislava, Faculty of Pharmacy; Slovak Republic
| | - Tatiana Foltanova
- Department of Pharmacology and Toxicology; Comenius University in Bratislava, Faculty of Pharmacy; Slovak Republic
| | - Eva Kralova
- Department of Pharmacology and Toxicology; Comenius University in Bratislava, Faculty of Pharmacy; Slovak Republic
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Kralova E, Doka G, Pivackova L, Srankova J, Kuracinova K, Janega P, Babal P, Klimas J, Krenek P. l-Arginine Attenuates Cardiac Dysfunction, But Further Down-Regulates α-Myosin Heavy Chain Expression in Isoproterenol-Induced Cardiomyopathy. Basic Clin Pharmacol Toxicol 2015; 117:251-60. [DOI: 10.1111/bcpt.12405] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2014] [Accepted: 03/26/2015] [Indexed: 12/15/2022]
Affiliation(s)
- Eva Kralova
- Department of Pharmacology and Toxicology; Faculty of Pharmacy; Comenius University in Bratislava; Bratislava Slovak Republic
| | - Gabriel Doka
- Department of Pharmacology and Toxicology; Faculty of Pharmacy; Comenius University in Bratislava; Bratislava Slovak Republic
| | - Lenka Pivackova
- Department of Pharmacology and Toxicology; Faculty of Pharmacy; Comenius University in Bratislava; Bratislava Slovak Republic
| | - Jasna Srankova
- Department of Pharmacology and Toxicology; Faculty of Pharmacy; Comenius University in Bratislava; Bratislava Slovak Republic
| | - Kristina Kuracinova
- Department of Pathology; Faculty of Medicine; Comenius University in Bratislava; Bratislava Slovak Republic
| | - Pavol Janega
- Department of Pathology; Faculty of Medicine; Comenius University in Bratislava; Bratislava Slovak Republic
- Slovak Academy of Sciences; Institute of Normal and Pathological Anatomy; Bratislava Slovak Republic
| | - Pavel Babal
- Department of Pathology; Faculty of Medicine; Comenius University in Bratislava; Bratislava Slovak Republic
| | - Jan Klimas
- Department of Pharmacology and Toxicology; Faculty of Pharmacy; Comenius University in Bratislava; Bratislava Slovak Republic
| | - Peter Krenek
- Department of Pharmacology and Toxicology; Faculty of Pharmacy; Comenius University in Bratislava; Bratislava Slovak Republic
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Sotnikova R, Okruhlicova L, Vlkovicova J, Navarova J, Gajdacova B, Pivackova L, Fialova S, Krenek P. Rosmarinic acid administration attenuates diabetes-induced vascular dysfunction of the rat aorta. J Pharm Pharmacol 2013; 65:713-23. [PMID: 23600389 DOI: 10.1111/jphp.12037] [Citation(s) in RCA: 55] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2012] [Accepted: 01/06/2013] [Indexed: 12/16/2023]
Abstract
OBJECTIVES Oxidative stress as well as inflammation processes are engaged in diabetic vascular complications. Rosmarinic acid, a natural phenol antioxidant carboxylic acid, was found to have multiple biological activity, including anti-inflammatory and antitumour effects, which are a consequence of its inhibition of the inflammatory processes and of reactive oxygen species scavenging. The aim of this work was to study effects of rosmarinic acid administration on vascular impairment induced by experimental diabetes in rats. METHODS Diabetes was induced by streptozocin (3 × 30 mg/kg daily, i.p.) in Wistar rats. Rosmarinic acid was administered orally (50 mg/kg daily). Ten weeks after streptozocin administration, the aorta was excised for functional studies, evaluation by electron microscopy and real time PCR analysis. KEY FINDINGS In the aorta of diabetic rats, decreased endothelium-dependent relaxation was accompanied by overexpression of interleukin-1β, tumour necrosis factor-α, preproendothelin-1 and endothelin converting enzyme-1. Structural alterations in the endothelium, detected by electron microscopy, indicated aortic dysfunction caused by diabetes. The diabetes-induced aortic disorders were prevented by rosmarinic acid administration. CONCLUSIONS Rosmarinic acid protected aortic endothelial function and ultrastructure against diabetes-induced damage. Both antioxidant and anti-inflammatory effects of rosmarinic acid seemed to participate in the mechanism of this protection.
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Affiliation(s)
- Ruzena Sotnikova
- Institute of Experimental Pharmacology and Toxicology, Slovak Academy of Sciences, Bratislava, Slovak Republic.
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Fridolfsson HN, Patel HH. Caveolin and caveolae in age associated cardiovascular disease. JOURNAL OF GERIATRIC CARDIOLOGY : JGC 2013; 10:66-74. [PMID: 23610576 PMCID: PMC3627709 DOI: 10.3969/j.issn.1671-5411.2013.01.011] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Subscribe] [Scholar Register] [Received: 08/07/2012] [Revised: 12/15/2012] [Accepted: 12/18/2012] [Indexed: 12/13/2022]
Abstract
It is estimated that the elderly (> 65 years of age) will increase from 13%−14% to 25% by 2035. If this trend continues, > 50% of the United States population and more than two billion people worldwide will be “aged” in the next 50 years. Aged individuals face formidable challenges to their health, as aging is associated with a myriad of diseases. Cardiovascular disease is the leading cause of morbidity and mortality in the United States with > 50% of mortality attributed to coronary artery disease and > 80% of these deaths occurring in those age 65 and older. Therefore, age is an important predictor of cardiovascular disease. The efficiency of youth is built upon cellular signaling scaffolds that provide tight and coordinated signaling. Lipid rafts are one such scaffold of which caveolae are a subset. In this review, we consider the importance of caveolae in common cardiovascular diseases of the aged and as potential therapeutic targets. We specifically address the role of caveolin in heart failure, myocardial ischemia, and pulmonary hypertension.
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Affiliation(s)
- Heidi N Fridolfsson
- Departments of Anesthesiology, University of California, San Diego, La Jolla, California 92093, USA
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Mackovicova K, Gazova A, Kucerova D, Gajdacova B, Klimas J, Ochodnicky P, Goncalvesova E, Kyselovic J, Krenek P. Enalapril decreases cardiac mass and fetal gene expression without affecting the expression of endothelin-1, transforming growth factor β-1, or cardiotrophin-1 in the healthy normotensive rat. Can J Physiol Pharmacol 2011; 89:197-205. [DOI: 10.1139/y11-014] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Angiotensin II can induce cardiac hypertrophy by stimulating the release of growth factors. ACE inhibitors reduce angiotensin II levels and cardiac hypertrophy, but their effects on the healthy heart are largely unexplored. We hypothesized that ACE inhibition decreases left ventricular mass in normotensive animals and that this is associated with altered expression of cardiac fetal genes, growth factors, and endothelial nitric oxide synthase (eNOS). Wistar rats (n = 7 per group) were orally administered with enalapril twice daily for a total daily dose of 5 mg·kg–1·d–1 (ENAP5) or 15 mg·kg–1·d–1 (ENAP15) or vehicle. Systolic blood pressure was measured by the tail-cuff method. Left ventricular expression of cardiac myosin heavy chain-α (MYH6) and -β (MYH7), atrial natriuretic peptide (ANP), endothelin-1 (ET-1), transforming growth factor β-1 (TGFβ-1), cardiotrophin-1 (CT-1), and renal renin were examined by real-time PCR, and eNOS using Western blot. Blood pressure was decreased only in ENAP15 animals (p < 0.05 vs. Control), whereas left ventricular mass decreased after both doses of enalapril (p < 0.05 vs. Control). MYH7 and ANP were reduced in ENAP15, while no changes in ET-1, TGFβ-1, CT-1, and MYH6 mRNA or eNOS protein were observed. Renal renin dose-dependently increased after enalapril treatment. Enalapril significantly decreased left ventricular mass even after 1 week treatment in the normotensive rat. This was associated with a decreased expression of the fetal genes MYH7 and ANP, but not expression of ET-1, CT-1, or TGFβ-1.
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Affiliation(s)
- Katarina Mackovicova
- Department of Pharmacology and Toxicology, Faculty of Pharmacy, Comenius University, Odbojárov 10, 832 32 Bratislava, Slovakia
- Faculty of Medicine, Institute of Pharmacology and Clinical Pharmacology, Comenius University, Sasinkova 4, 811 08 Bratislava, Slovakia
- Department of Heart Transplantation, The National Institute of Cardiovascular Diseases, Pod Krásnou hôrkou 1, 833 48 Bratislava, Slovakia
| | - Andrea Gazova
- Department of Pharmacology and Toxicology, Faculty of Pharmacy, Comenius University, Odbojárov 10, 832 32 Bratislava, Slovakia
- Faculty of Medicine, Institute of Pharmacology and Clinical Pharmacology, Comenius University, Sasinkova 4, 811 08 Bratislava, Slovakia
- Department of Heart Transplantation, The National Institute of Cardiovascular Diseases, Pod Krásnou hôrkou 1, 833 48 Bratislava, Slovakia
| | - Dana Kucerova
- Department of Pharmacology and Toxicology, Faculty of Pharmacy, Comenius University, Odbojárov 10, 832 32 Bratislava, Slovakia
- Faculty of Medicine, Institute of Pharmacology and Clinical Pharmacology, Comenius University, Sasinkova 4, 811 08 Bratislava, Slovakia
- Department of Heart Transplantation, The National Institute of Cardiovascular Diseases, Pod Krásnou hôrkou 1, 833 48 Bratislava, Slovakia
| | - Beata Gajdacova
- Department of Pharmacology and Toxicology, Faculty of Pharmacy, Comenius University, Odbojárov 10, 832 32 Bratislava, Slovakia
- Faculty of Medicine, Institute of Pharmacology and Clinical Pharmacology, Comenius University, Sasinkova 4, 811 08 Bratislava, Slovakia
- Department of Heart Transplantation, The National Institute of Cardiovascular Diseases, Pod Krásnou hôrkou 1, 833 48 Bratislava, Slovakia
| | - Jan Klimas
- Department of Pharmacology and Toxicology, Faculty of Pharmacy, Comenius University, Odbojárov 10, 832 32 Bratislava, Slovakia
- Faculty of Medicine, Institute of Pharmacology and Clinical Pharmacology, Comenius University, Sasinkova 4, 811 08 Bratislava, Slovakia
- Department of Heart Transplantation, The National Institute of Cardiovascular Diseases, Pod Krásnou hôrkou 1, 833 48 Bratislava, Slovakia
| | - Peter Ochodnicky
- Department of Pharmacology and Toxicology, Faculty of Pharmacy, Comenius University, Odbojárov 10, 832 32 Bratislava, Slovakia
- Faculty of Medicine, Institute of Pharmacology and Clinical Pharmacology, Comenius University, Sasinkova 4, 811 08 Bratislava, Slovakia
- Department of Heart Transplantation, The National Institute of Cardiovascular Diseases, Pod Krásnou hôrkou 1, 833 48 Bratislava, Slovakia
| | - Eva Goncalvesova
- Department of Pharmacology and Toxicology, Faculty of Pharmacy, Comenius University, Odbojárov 10, 832 32 Bratislava, Slovakia
- Faculty of Medicine, Institute of Pharmacology and Clinical Pharmacology, Comenius University, Sasinkova 4, 811 08 Bratislava, Slovakia
- Department of Heart Transplantation, The National Institute of Cardiovascular Diseases, Pod Krásnou hôrkou 1, 833 48 Bratislava, Slovakia
| | - Jan Kyselovic
- Department of Pharmacology and Toxicology, Faculty of Pharmacy, Comenius University, Odbojárov 10, 832 32 Bratislava, Slovakia
- Faculty of Medicine, Institute of Pharmacology and Clinical Pharmacology, Comenius University, Sasinkova 4, 811 08 Bratislava, Slovakia
- Department of Heart Transplantation, The National Institute of Cardiovascular Diseases, Pod Krásnou hôrkou 1, 833 48 Bratislava, Slovakia
| | - Peter Krenek
- Department of Pharmacology and Toxicology, Faculty of Pharmacy, Comenius University, Odbojárov 10, 832 32 Bratislava, Slovakia
- Faculty of Medicine, Institute of Pharmacology and Clinical Pharmacology, Comenius University, Sasinkova 4, 811 08 Bratislava, Slovakia
- Department of Heart Transplantation, The National Institute of Cardiovascular Diseases, Pod Krásnou hôrkou 1, 833 48 Bratislava, Slovakia
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Klimas J, Kmecova J, Jankyova S, Yaghi D, Priesolova E, Kyselova Z, Musil P, Ochodnicky P, Krenek P, Kyselovic J, Matyas S. Pycnogenol®
improves left ventricular function in streptozotocin-induced diabetic cardiomyopathy in rats. Phytother Res 2009; 24:969-74. [DOI: 10.1002/ptr.3015] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
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Mikušová A, Kráľová E, Tylková L, Novotová M, Stankovičová T. Myocardial remodelling induced by repeated low doses of isoproterenol. Can J Physiol Pharmacol 2009; 87:641-51. [DOI: 10.1139/y09-053] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
In the present work, the effect of isoproterenol on the electrical properties of the rat heart and on the cytoarchitecture of the surviving cardiomyocytes was studied. Myocardial remodelling was induced by the daily administration of 5 mg/kg isoproterenol (Iso) for 7 days. Administration resulted in a significant increase (52%) in the ratio of left ventricular weight to body weight. ECG voltage criteria confirmed the presence of left ventricular hypertrophy. QT interval prolongation by 23% and 58% was found in Iso rats and in the corresponding isolated hearts, respectively. Spontaneously beating Iso hearts had a higher incidence of dysrhythmias. The surviving cardiomyocytes showed an irregular shape with cytoplasmic processes rich in ribosomes and rough endoplasmic reticulum. In these regions, myofibril disorganization and mitochondrial fission were observed. A greatly increased incidence of caveolae was seen in the plasma membrane and in the mouth of t-tubules. The membranes of t-tubules showed vesiculation, especially near the dyads. Repeated administration of isoproterenol led to hypertrophy, characterized by the existence of myocytes with simultaneous signs of both mature and postnatally developing cardiomyocytes. Structural microheterogeneities at the level of individual cells may represent one of the factors leading to electrical imbalance in the myocardial tissue remodelled by isoproterenol.
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Affiliation(s)
- Andrea Mikušová
- Institute of Molecular Physiology and Genetics, Slovak Academy of Sciences, Vlárska 5, 833 34 Bratislava, Slovak Republic
- Comenius University, Faculty of Pharmacy, Department of Pharmacology and Toxicology, 8 Kalinčiakova, 832 32 Bratislava, Slovak Republic
| | - Eva Kráľová
- Institute of Molecular Physiology and Genetics, Slovak Academy of Sciences, Vlárska 5, 833 34 Bratislava, Slovak Republic
- Comenius University, Faculty of Pharmacy, Department of Pharmacology and Toxicology, 8 Kalinčiakova, 832 32 Bratislava, Slovak Republic
| | - Lucia Tylková
- Institute of Molecular Physiology and Genetics, Slovak Academy of Sciences, Vlárska 5, 833 34 Bratislava, Slovak Republic
- Comenius University, Faculty of Pharmacy, Department of Pharmacology and Toxicology, 8 Kalinčiakova, 832 32 Bratislava, Slovak Republic
| | - Marta Novotová
- Institute of Molecular Physiology and Genetics, Slovak Academy of Sciences, Vlárska 5, 833 34 Bratislava, Slovak Republic
- Comenius University, Faculty of Pharmacy, Department of Pharmacology and Toxicology, 8 Kalinčiakova, 832 32 Bratislava, Slovak Republic
| | - Tatiana Stankovičová
- Institute of Molecular Physiology and Genetics, Slovak Academy of Sciences, Vlárska 5, 833 34 Bratislava, Slovak Republic
- Comenius University, Faculty of Pharmacy, Department of Pharmacology and Toxicology, 8 Kalinčiakova, 832 32 Bratislava, Slovak Republic
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Krenek P, Kmecova J, Kucerova D, Bajuszova Z, Musil P, Gazova A, Ochodnicky P, Klimas J, Kyselovic J. Isoproterenol-induced heart failure in the rat is associated with nitric oxide-dependent functional alterations of cardiac function. Eur J Heart Fail 2009; 11:140-6. [PMID: 19168511 DOI: 10.1093/eurjhf/hfn026] [Citation(s) in RCA: 76] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/22/2023] Open
Abstract
AIMS The role of nitric oxide (NO) in heart failure (HF) is complex and remains controversial. We tested the hypothesis that the role of NO in isolated atria and cardiomyocytes is altered in isoproterenol-induced HF. METHODS AND RESULTS Rats received isoproterenol (ISO, 5 mg/kg/day, intraperitoneally) or vehicle for 1 week. Haemodynamic parameters were obtained by left ventricular catheterization. Effects of NOS inhibition on isolated atria and on electrically paced left ventricular myocytes were determined. Additionally, expressions of nitric oxide synthases and their allosteric modulators hsp90, caveolin-1, and caveolin-3 proteins in the left ventricles were measured. ISO increased left ventricular mass by 33% and decreased indices of left ventricular systolic and diastolic function dp/dtmin and dp/dtmax (both P<0.05). Isolated atria from HF rats had a lower spontaneous beating rate (P<0.05). NOS inhibition by L-NAME increased basal frequency and attenuated the positive chronotropic effect of beta-adrenergic stimulation in the HF group (P<0.05). Ventricular myocytes from failing hearts had impaired cell shortening. L-NAME decreased contractility of control, but not failing myocytes. Left ventricular expressions of eNOS, hsp90, iNOS, but not nNOS or caveolins, were increased. CONCLUSION Despite the increased capacity for NO synthesis in isoproterenol-induced HF, NO does not sustain contractility of failing myocytes. NO may contribute to the decreased basal heart rate and it may accelerate beta-adrenergic stimulation of chronotropy.
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Affiliation(s)
- Peter Krenek
- Department of Pharmacology and Toxicology, Faculty of Pharmacy, Comenius University, Odbojárov 10, 832 32 Bratislava, Slovak Republic.
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