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Lin SR, Lin QM, Lin YJ, Qian X, Wang XP, Gong Z, Chen F, Song B. Bradykinin postconditioning protects rat hippocampal neurons after restoration of spontaneous circulation following cardiac arrest via activation of the AMPK/mTOR signaling pathway. Neural Regen Res 2022; 17:2232-2237. [PMID: 35259843 PMCID: PMC9083139 DOI: 10.4103/1673-5374.337049] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
Abstract
Bradykinin (BK) is an active component of the kallikrein-kinin system that has been shown to have cardioprotective and neuroprotective effects. We previously showed that BK postconditioning strongly protects rat hippocampal neurons upon restoration of spontaneous circulation (ROSC) after cardiac arrest. However, the precise mechanism underlying this process remains poorly understood. In this study, we treated a rat model of ROSC after cardiac arrest (induced by asphyxiation) with 150 μg/kg BK via intraperitoneal injection 48 hours after ROSC following cardiac arrest. We found that BK postconditioning effectively promoted the recovery of rat neurological function after ROSC following cardiac arrest, increased the amount of autophagosomes in the hippocampal tissue, inhibited neuronal cell apoptosis, up-regulated the expression of autophagy-related proteins LC3 and NBR1 and down-regulated p62, inhibited the expression of the brain injury marker S100β and apoptosis-related protein caspase-3, and affected the expression of adenosine monophosphate-activated protein kinase/mechanistic target of rapamycin pathway-related proteins. Adenosine monophosphate-activated protein kinase inhibitor compound C clearly inhibited BK-mediated activation of autophagy in rats after ROSC following cardiac arrest, which aggravated the injury caused by ROSC. The mechanistic target of rapamycin inhibitor rapamycin enhanced the protective effects of BK by stimulating autophagy. Our findings suggest that BK postconditioning protects against injury caused by ROSC through activating the adenosine monophosphate-activated protein kinase/mechanistic target of the rapamycin pathway.
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Affiliation(s)
- Shi-Rong Lin
- Provincial College of Clinical Medicine, Fujian Medical University; Department of Emergency, Fujian Provincial Hospital South Branch; Department of Emergency, Fujian Provincial Hospital; Fujian Emergency Medical Center; Fujian Provincial Key Laboratory of Emergency Medicine, Fuzhou, Fujian Province, China
| | - Qing-Ming Lin
- Provincial College of Clinical Medicine, Fujian Medical University; Department of Emergency, Fujian Provincial Hospital; Fujian Emergency Medical Center; Fujian Provincial Key Laboratory of Emergency Medicine, Fuzhou, Fujian Province, China
| | - Yu-Jia Lin
- Provincial College of Clinical Medicine, Fujian Medical University, Fuzhou, Fujian Province, China
| | - Xin Qian
- Provincial College of Clinical Medicine, Fujian Medical University; Department of Emergency, Fujian Provincial Hospital; Fujian Emergency Medical Center; Fujian Provincial Key Laboratory of Emergency Medicine, Fuzhou, Fujian Province, China
| | - Xiao-Ping Wang
- Provincial College of Clinical Medicine, Fujian Medical University; Department of Emergency, Fujian Provincial Hospital; Fujian Emergency Medical Center; Fujian Provincial Key Laboratory of Emergency Medicine, Fuzhou, Fujian Province, China
| | - Zheng Gong
- Provincial College of Clinical Medicine, Fujian Medical University; Department of Emergency, Fujian Provincial Hospital; Fujian Emergency Medical Center; Fujian Provincial Key Laboratory of Emergency Medicine, Fuzhou, Fujian Province, China
| | - Feng Chen
- Provincial College of Clinical Medicine, Fujian Medical University; Department of Emergency, Fujian Provincial Hospital; Fujian Emergency Medical Center; Fujian Provincial Key Laboratory of Emergency Medicine, Fuzhou, Fujian Province, China
| | - Bin Song
- Department of Human Anatomy, School of Basic Medical Sciences, Fujian Medical University; Key Laboratory of Brain Aging and Neurodegenerative Diseases of Fujian Province; Laboratory of Clinical Applied Anatomy, Fujian Medical University, Fuzhou, Fujian Province, China
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S Beserra S, Roman-Campos D. Impact of pacing frequency in amiodarone interaction with cardiomyocytes near physiological temperature in health and disease conditions. Basic Clin Pharmacol Toxicol 2020; 128:615-620. [PMID: 33124101 DOI: 10.1111/bcpt.13527] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2020] [Revised: 10/21/2020] [Accepted: 10/26/2020] [Indexed: 11/29/2022]
Abstract
Long QT syndrome type 3 (LQT-3) is a disease related to abnormal cardiac sodium channel function (Nav 1.5), usually due to augmented late sodium current (INaL ), and may lead to ventricular fibrillation. Amiodarone is approved for ventricular fibrillation. Thus, we investigated whether pacing frequency impacts the ability of amiodarone to reverse the arrhythmic phenotype observed in LQT-3. Anemone neurotoxin 2 (ATX-II, here named only ATX) was used to enhance INaL in mice left ventricular myocytes (LVM). A video detector system monitored sarcomere shortening. At 1 Hz, amiodarone attenuated sarcomere shortening only at 10 µmol/L; at 3 and 5 Hz, 0.1 and 1 µmol/L amiodarone also reduced sarcomere shortening. However, no effect of amiodarone was observed on time to 50% of sarcomere contraction and relaxation. In LVM exposed to ATX (10 nmol/L), an arrhythmic phenotype was observed, and it was more severe when cells were paced at 1 Hz. Amiodarone failed to reverse the ATX induced phenotype at different pacing frequencies. Thus, our results suggest that amiodarone's ability to reverse arrhythmias induced by augmentation of INaL is limited. These findings suggest further experimentation will be required to clarify whether a clinical effect can be ascribed to an effect of amiodarone on other ion channels in LQT-3.
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Affiliation(s)
- Samuel S Beserra
- Laboratory of CardioBiology, Department of Biophysics, Paulista School of Medicina, Federal University of Sao Paulo, Sao Paulo, Brazil
| | - Danilo Roman-Campos
- Laboratory of CardioBiology, Department of Biophysics, Paulista School of Medicina, Federal University of Sao Paulo, Sao Paulo, Brazil
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Beserra SS, Santos-Miranda A, Sarmento JO, Miranda VM, Roman-Campos D. Effects of amiodarone on rodent ventricular cardiomyocytes: Novel perspectives from a cellular model of Long QT Syndrome Type 3. Life Sci 2020; 255:117814. [PMID: 32439300 DOI: 10.1016/j.lfs.2020.117814] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2020] [Revised: 05/04/2020] [Accepted: 05/15/2020] [Indexed: 10/24/2022]
Abstract
AIMS Amiodarone (AMIO) is currently used in medical practice to reverse ventricular tachycardia. Here we determine the effects of AMIO in the electromechanical properties of isolated left ventricle myocyte (LVM) from mice and guinea pig and in a cellular model of Long QT Syndrome Type 3 (LQTS-3) using anemone neurotoxin 2 (ATX II), which induces increase of late sodium current in LVM. MAIN METHODS AND KEY FINDINGS Using patch-clamp technique, fluorescence imaging to detect cellular Ca2+ transient and sarcomere detection systems we evaluate the effect of AMIO in healthy LVM. AMIO produced a significant reduction in the percentage of sarcomere shortening (0.1, 1 and 10 μM) in a range of pacing frequencies, however, without significant attenuation of Ca2+ transient. Also, 10 μM of AMIO caused the opposite effect on action potential repolarization of mouse and guinea pig LVM. When LVM from mouse and guinea pig were paced in a range of pacing frequencies and exposed to ATX (10 nM), AMIO (10 μM) was only able to abrogate electromechanical arrhythmias in LVM from guinea pig at lower pacing frequency. SIGNIFICANCE AMIO has negative inotropic effect with opposite effect on action potential waveform in mouse and guinea pig LVM. Furthermore, the antiarrhythmic action of AMIO in LQTS-3 is species and frequency-dependent, which indicates that AMIO may be beneficial for some types of arrhythmias related to late sodium current.
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Affiliation(s)
- Samuel Santos Beserra
- Laboratory of CardioBiology, Department of Biophysics, Paulista School of Medicina, Federal University of Sao Paulo, Brazil
| | - Artur Santos-Miranda
- Laboratory of CardioBiology, Department of Biophysics, Paulista School of Medicina, Federal University of Sao Paulo, Brazil
| | - Jaqueline Oliveira Sarmento
- Laboratory of CardioBiology, Department of Biophysics, Paulista School of Medicina, Federal University of Sao Paulo, Brazil
| | - Victor Martins Miranda
- Laboratory of CardioBiology, Department of Biophysics, Paulista School of Medicina, Federal University of Sao Paulo, Brazil
| | - Danilo Roman-Campos
- Laboratory of CardioBiology, Department of Biophysics, Paulista School of Medicina, Federal University of Sao Paulo, Brazil.
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Mesquita TRR, Miguel-dos-Santos R, Jesus ICGD, de Almeida GKM, Fernandes VA, Gomes AAL, Guatimosim S, Martins-Silva L, Ferreira AJ, Capettini LDSA, Pesquero JL, Lauton-Santos S. Ablation of B1- and B2-kinin receptors causes cardiac dysfunction through redox-nitroso unbalance. Life Sci 2019; 228:121-127. [DOI: 10.1016/j.lfs.2019.04.062] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2019] [Revised: 04/24/2019] [Accepted: 04/26/2019] [Indexed: 01/03/2023]
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Cruz JS, Santos-Miranda A, Sales-Junior PA, Monti-Rocha R, Campos PP, Machado FS, Roman-Campos D. Altered Cardiomyocyte Function and Trypanosoma cruzi Persistence in Chagas Disease. Am J Trop Med Hyg 2016; 94:1028-33. [PMID: 26976879 DOI: 10.4269/ajtmh.15-0255] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2015] [Accepted: 01/28/2016] [Indexed: 12/22/2022] Open
Abstract
Chagas disease, caused by the triatominae Trypanosoma cruzi, is one of the leading causes of heart malfunctioning in Latin America. The cardiac phenotype is observed in 20-30% of infected people 10-40 years after their primary infection. The cardiac complications during Chagas disease range from cardiac arrhythmias to heart failure, with important involvement of the right ventricle. Interestingly, no studies have evaluated the electrical properties of right ventricle myocytes during Chagas disease and correlated them to parasite persistence. Taking advantage of a murine model of Chagas disease, we studied the histological and electrical properties of right ventricle in acute (30 days postinfection [dpi]) and chronic phases (90 dpi) of infected mice with the Colombian strain of T. cruzi and their correlation to parasite persistence. We observed an increase in collagen deposition and inflammatory infiltrate at both 30 and 90 dpi. Furthermore, using reverse transcriptase polymerase chain reaction, we detected parasites at 90 dpi in right and left ventricles. In addition, we observed action potential prolongation and reduced transient outward K(+) current and L-type Ca(2+) current at 30 and 90 dpi. Taking together, our results demonstrate that T. cruzi infection leads to important modifications in electrical properties associated with inflammatory infiltrate and parasite persistence in mice right ventricle, suggesting a causal role between inflammation, parasite persistence, and altered cardiomyocyte function in Chagas disease. Thus, arrhythmias observed in Chagas disease may be partially related to altered electrical function in right ventricle.
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Affiliation(s)
- Jader Santos Cruz
- Universidade Federal de Minas Gerais, Minas Gerais, Brazil; Centro de Pesquisas René Rachou, Fundação Oswaldo Cruz (FIOCRUZ), Minas Gerais, Brazil; Escola Paulista de Medicina, Universidade Federal de São Paulo, São Paulo, Brazil
| | - Artur Santos-Miranda
- Universidade Federal de Minas Gerais, Minas Gerais, Brazil; Centro de Pesquisas René Rachou, Fundação Oswaldo Cruz (FIOCRUZ), Minas Gerais, Brazil; Escola Paulista de Medicina, Universidade Federal de São Paulo, São Paulo, Brazil
| | - Policarpo Ademar Sales-Junior
- Universidade Federal de Minas Gerais, Minas Gerais, Brazil; Centro de Pesquisas René Rachou, Fundação Oswaldo Cruz (FIOCRUZ), Minas Gerais, Brazil; Escola Paulista de Medicina, Universidade Federal de São Paulo, São Paulo, Brazil
| | - Renata Monti-Rocha
- Universidade Federal de Minas Gerais, Minas Gerais, Brazil; Centro de Pesquisas René Rachou, Fundação Oswaldo Cruz (FIOCRUZ), Minas Gerais, Brazil; Escola Paulista de Medicina, Universidade Federal de São Paulo, São Paulo, Brazil
| | - Paula Peixoto Campos
- Universidade Federal de Minas Gerais, Minas Gerais, Brazil; Centro de Pesquisas René Rachou, Fundação Oswaldo Cruz (FIOCRUZ), Minas Gerais, Brazil; Escola Paulista de Medicina, Universidade Federal de São Paulo, São Paulo, Brazil
| | - Fabiana Simão Machado
- Universidade Federal de Minas Gerais, Minas Gerais, Brazil; Centro de Pesquisas René Rachou, Fundação Oswaldo Cruz (FIOCRUZ), Minas Gerais, Brazil; Escola Paulista de Medicina, Universidade Federal de São Paulo, São Paulo, Brazil
| | - Danilo Roman-Campos
- Universidade Federal de Minas Gerais, Minas Gerais, Brazil; Centro de Pesquisas René Rachou, Fundação Oswaldo Cruz (FIOCRUZ), Minas Gerais, Brazil; Escola Paulista de Medicina, Universidade Federal de São Paulo, São Paulo, Brazil
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Yasuda J, Takada L, Kajiwara Y, Okada M, Yamawaki H. Endostatin inhibits bradykinin-induced cardiac contraction. J Vet Med Sci 2015; 77:1391-5. [PMID: 26050753 PMCID: PMC4667655 DOI: 10.1292/jvms.15-0200] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
.Endogenous fragments of extracellular matrix are known to possess various biological
effects. Levels of endostatin, a fragment of collagen type XVIII, increase in certain
cardiac diseases, such as cardiac hypertrophy and myocardial infarction. However, the
influence of endostatin on cardiac contraction has not been clarified. In the present
study, we investigated the effects of endostatin on bradykinin-induced atrial contraction.
Isometric contractile force of mouse isolated left atria induced by electrical current
pulse was measured. Voltage-dependent calcium current of guinea pig ventricular myocytes
was measured by a whole-cell patch-clamp technique. Endostatin (100–1,000
ng/ml) alone treatment had no influence on left atrial
contraction. On the other hand, pretreatment with endostatin (300
ng/ml) significantly inhibited bradykinin (1
µM)-induced contraction and voltage-dependent calcium current. These
data suggest that endostatin may decrease bradykinin-induced cardiac contraction perhaps
through the inhibition of voltage-dependent calcium channel.
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Affiliation(s)
- Jumpei Yasuda
- Laboratory of Veterinary Pharmacology, School of Veterinary Medicine, Kitasato University, Higashi 23 bancho 35-1, Towada city, Aomori 034-8628, Japan
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Wolke C, Bukowska A, Goette A, Lendeckel U. Redox control of cardiac remodeling in atrial fibrillation. Biochim Biophys Acta Gen Subj 2014; 1850:1555-65. [PMID: 25513966 DOI: 10.1016/j.bbagen.2014.12.012] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2014] [Revised: 11/04/2014] [Accepted: 12/09/2014] [Indexed: 01/08/2023]
Abstract
BACKGROUND Atrial fibrillation (AF) is the most common arrhythmia in clinical practice and is a potential cause of thromboembolic events. AF induces significant changes in the electrophysiological properties of atrial myocytes and causes alterations in the structure, metabolism, and function of the atrial tissue. The molecular basis for the development of structural atrial remodeling of fibrillating human atria is still not fully understood. However, increased production of reactive oxygen or nitrogen species (ROS/RNS) and the activation of specific redox-sensitive signaling pathways observed both in patients with and animal models of AF are supposed to contribute to development, progression and self-perpetuation of AF. SCOPE OF REVIEW The present review summarizes the sources and targets of ROS/RNS in the setting of AF and focuses on key redox-sensitive signaling pathways that are implicated in the pathogenesis of AF and function either to aggravate or protect from disease. MAJOR CONCLUSIONS NADPH oxidases and various mitochondrial monooxygenases are major sources of ROS during AF. Besides direct oxidative modification of e.g. ion channels and ion handling proteins that are crucially involved in action potential generation and duration, AF leads to the reversible activation of redox-sensitive signaling pathways mediated by activation of redox-regulated proteins including Nrf2, NF-κB, and CaMKII. Both processes are recognized to contribute to the formation of a substrate for AF and, thus, to increase AF inducibility and duration. GENERAL SIGNIFICANCE AF is a prevalent disease and due to the current demographic developments its socio-economic relevance will further increase. Improving our understanding of the role that ROS and redox-related (patho)-mechanisms play in the development and progression of AF may allow the development of a targeted therapy for AF that surpasses the efficacy of previous general anti-oxidative strategies. This article is part of a Special Issue entitled Redox regulation of differentiation and de-differentiation.
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Affiliation(s)
- Carmen Wolke
- Institute of Medical Biochemistry and Molecular Biology, University Medicine Greifswald, D-17487 Greifswald, Germany
| | - Alicja Bukowska
- EUTRAF Working Group: Molecular Electrophysiology, University Hospital Magdeburg, D-39120 Magdeburg, Germany
| | - Andreas Goette
- EUTRAF Working Group: Molecular Electrophysiology, University Hospital Magdeburg, D-39120 Magdeburg, Germany; Department of Cardiology and Intensive Care Medicine, St. Vincenz-Hospital, D-33098 Paderborn, Germany
| | - Uwe Lendeckel
- Institute of Medical Biochemistry and Molecular Biology, University Medicine Greifswald, D-17487 Greifswald, Germany.
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Pereira RL, Felizardo RJF, Cenedeze MA, Hiyane MI, Bassi EJ, Amano MT, Origassa CST, Silva RC, Aguiar CF, Carneiro SM, Pesquero JB, Araújo RC, Keller ADC, Monteiro RC, Moura IC, Pacheco-Silva A, Câmara NOS. Balance between the two kinin receptors in the progression of experimental focal and segmental glomerulosclerosis in mice. Dis Model Mech 2014; 7:701-10. [PMID: 24742784 PMCID: PMC4036477 DOI: 10.1242/dmm.014548] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023] Open
Abstract
Focal and segmental glomerulosclerosis (FSGS) is one of the most important renal diseases related to end-stage renal failure. Bradykinin has been implicated in the pathogenesis of renal inflammation, whereas the role of its receptor 2 (B2RBK; also known as BDKRB2) in FSGS has not been studied. FSGS was induced in wild-type and B2RBK-knockout mice by a single intravenous injection of Adriamycin (ADM). In order to further modulate the kinin receptors, the animals were also treated with the B2RBK antagonist HOE-140 and the B1RBK antagonist DALBK. Here, we show that the blockage of B2RBK with HOE-140 protects mice from the development of FSGS, including podocyte foot process effacement and the re-establishment of slit-diaphragm-related proteins. However, B2RBK-knockout mice were not protected from FSGS. These opposite results were due to B1RBK expression. B1RBK was upregulated after the injection of ADM and this upregulation was exacerbated in B2RBK-knockout animals. Furthermore, treatment with HOE-140 downregulated the B1RBK receptor. The blockage of B1RBK in B2RBK-knockout animals promoted FSGS regression, with a less-inflammatory phenotype. These results indicate a deleterious role of both kinin receptors in an FSGS model and suggest a possible cross-talk between them in the progression of disease.
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Affiliation(s)
- Rafael Luiz Pereira
- Laboratory of Clinical and Experimental Immunology, Nephrology Division, Federal University of São Paulo, São Paulo 04023-900, Brazil. Laboratory of Transplantation Immunobiology, Department of Immunology, Institute of Biomedical Sciences IV, University of São Paulo, São Paulo 05508-000, Brazil
| | - Raphael José Ferreira Felizardo
- Laboratory of Clinical and Experimental Immunology, Nephrology Division, Federal University of São Paulo, São Paulo 04023-900, Brazil
| | - Marcos Antônio Cenedeze
- Laboratory of Clinical and Experimental Immunology, Nephrology Division, Federal University of São Paulo, São Paulo 04023-900, Brazil
| | - Meire Ioshie Hiyane
- Laboratory of Transplantation Immunobiology, Department of Immunology, Institute of Biomedical Sciences IV, University of São Paulo, São Paulo 05508-000, Brazil
| | - Enio José Bassi
- Laboratory of Clinical and Experimental Immunology, Nephrology Division, Federal University of São Paulo, São Paulo 04023-900, Brazil
| | - Mariane Tami Amano
- Laboratory of Clinical and Experimental Immunology, Nephrology Division, Federal University of São Paulo, São Paulo 04023-900, Brazil
| | - Clarice Sylvia Taemi Origassa
- Laboratory of Clinical and Experimental Immunology, Nephrology Division, Federal University of São Paulo, São Paulo 04023-900, Brazil
| | - Reinaldo Correia Silva
- Laboratory of Clinical and Experimental Immunology, Translational Medicine Division, Federal University of São Paulo, São Paulo 04039-002, Brazil
| | - Cristhiane Fávero Aguiar
- Laboratory of Transplantation Immunobiology, Department of Immunology, Institute of Biomedical Sciences IV, University of São Paulo, São Paulo 05508-000, Brazil
| | - Sylvia Mendes Carneiro
- Laboratory of Cellular Biology, Instituto Butantan, Av. Vital Brazil 1500, São Paulo 05503-900, Brazil
| | - João Bosco Pesquero
- Department of Biophysics, Federal University of São Paulo (UNIFESP), São Paulo 04023-062, Brazil
| | - Ronaldo Carvalho Araújo
- Department of Biophysics, Federal University of São Paulo (UNIFESP), São Paulo 04023-062, Brazil
| | - Alexandre de Castro Keller
- Department of Microbiology, Immunology and Parasitology, Federal University of São Paulo (UNIFESP), São Paulo 04023-062, Brazil
| | - Renato C Monteiro
- Institut National de la Santé et de la Recherche Médicale Unité Mixte de Recherche 699, Paris 75870, France
| | - Ivan Cruz Moura
- Institut National de la Santé et de la Recherche Médicale Unité Mixte de Recherche 699, Paris 75870, France
| | - Alvaro Pacheco-Silva
- Laboratory of Clinical and Experimental Immunology, Nephrology Division, Federal University of São Paulo, São Paulo 04023-900, Brazil. Instituto Israelita de Ensino e Pesquisa Albert Einstein, Renal Transplantation Unit, Albert Einstein Hospital, São Paulo 05521-000, Brazil
| | - Niels Olsen Saraiva Câmara
- Laboratory of Clinical and Experimental Immunology, Nephrology Division, Federal University of São Paulo, São Paulo 04023-900, Brazil. Laboratory of Transplantation Immunobiology, Department of Immunology, Institute of Biomedical Sciences IV, University of São Paulo, São Paulo 05508-000, Brazil.
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Roman-Campos D, Sales-Junior P, Duarte HL, Gomes ER, Lara A, Campos P, Rocha NN, Resende RR, Ferreira A, Guatimosim S, Gazzinelli RT, Ropert C, Cruz JS. Novel insights into the development of chagasic cardiomyopathy: Role of PI3Kinase/NO axis. Int J Cardiol 2013; 167:3011-20. [DOI: 10.1016/j.ijcard.2012.09.020] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/23/2011] [Revised: 08/10/2012] [Accepted: 09/10/2012] [Indexed: 10/27/2022]
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Roman-Campos D, Sales-Júnior P, Duarte HL, Gomes ER, Guatimosim S, Ropert C, Gazzinelli RT, Cruz JS. Cardiomyocyte dysfunction during the chronic phase of Chagas disease. Mem Inst Oswaldo Cruz 2013; 108:243-5. [PMID: 23579807 PMCID: PMC3970661 DOI: 10.1590/0074-0276108022013019] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2012] [Accepted: 11/22/2012] [Indexed: 01/17/2023] Open
Abstract
Chagas disease, which is caused by the parasite Trypanosoma cruzi, is an important cause of heart failure. We investigated modifications in the cellular electrophysiological and calcium-handling characteristics of an infected mouse heart during the chronic phase of the disease. The patch-clamp technique was used to record action potentials (APs) and L-type Ca2+ and transient outward K+ currents. [Ca2+]i changes were determined using confocal microscopy. Infected ventricular cells showed prolonged APs, reduced transient outward K+ and L-type Ca2+ currents and reduced Ca2+ release from the sarcoplasmic reticulum. Thus, the chronic phase of Chagas disease is characterised by cardiomyocyte dysfunction, which could lead to heart failure.
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Affiliation(s)
- Danilo Roman-Campos
- Laboratório de Membranas Excitáveis e Biologia Cardiovascular, Departamento de Bioquímica e Imunologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brasil.
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11
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Coutinho DCO, Foureaux G, Rodrigues KDL, Salles RLA, Moraes PL, Murça TM, De Maria MLA, Gomes ERM, Santos RAS, Guatimosim S, Ferreira AJ. Cardiovascular effects of angiotensin A: a novel peptide of the renin-angiotensin system. J Renin Angiotensin Aldosterone Syst 2013; 15:480-6. [PMID: 23386282 DOI: 10.1177/1470320312474856] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
INTRODUCTION Angiotensin (Ang) A was first identified in human plasma and it differs from Ang II in Ala(1) instead of Asp(1). Here, we hypothesized that the actions of this peptide might explain, at least partially, the limited effects of AT1R antagonists in certain cardiovascular diseases. MATERIALS AND METHODS The effects of Ang A and Ang II on blood pressure (BP) and heart function were compared. Importantly, participation of AT1R in these effects was evaluated. Furthermore, the effects of these two peptides on ischemia/reperfusion arrhythmias and involvement of calcium in these effects were investigated. RESULTS Administration of increasing doses of these peptides caused elevations in BP at comparable magnitude. AT1R blockade completely abolished these effects. The actions of these peptides in cardiac function were quite similar although the effects of Ang A were only partially blocked by losartan. Interestingly, Ang II elicited an increase in the duration of ischemia/reperfusion arrhythmias while Ang A had no effect on cardiac rhythm during reperfusion. In accordance, differently to Ang II, Ang A did not induce any significant effect on calcium transient during baseline and ischemic stress conditions. CONCLUSIONS These data suggest that the existence of alternative peptides of the renin-angiotensin system (RAS) might contribute to the limited effects of angiotensin receptor blockers (ARBs) in certain pathophysiological circumstances.
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Affiliation(s)
| | - Giselle Foureaux
- Department of Morphology, Federal University of Minas Gerais, Brazil
| | | | | | - Patrícia L Moraes
- Department of Morphology, Federal University of Minas Gerais, Brazil
| | - Tatiane M Murça
- Department of Morphology, Federal University of Minas Gerais, Brazil
| | | | - Enéas R M Gomes
- Department of Physiology and Biophysics, Federal University of Minas Gerais, Brazil
| | - Robson A S Santos
- Department of Physiology and Biophysics, Federal University of Minas Gerais, Brazil
| | - Sílvia Guatimosim
- Department of Physiology and Biophysics, Federal University of Minas Gerais, Brazil
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12
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Roman-Campos D, Carneiro-Júnior MA, Prímola-Gomes TN, Silva KA, Quintão-Júnior JF, Gondim ANS, Duarte HL, Cruz JS, Natali AJ. Chronic exercise partially restores the transmural heterogeneity of action potential duration in left ventricular myocytes of spontaneous hypertensive rats. Clin Exp Pharmacol Physiol 2012; 39:155-7. [DOI: 10.1111/j.1440-1681.2011.05669.x] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Affiliation(s)
- Danilo Roman-Campos
- Department of Biochemistry and Immunology; Federal University of Minas Gerais; Belo Horizonte; Minas Gerais; Brazil
| | | | - Thales N Prímola-Gomes
- Department of Physical Education; Federal University of Viçosa; Viçosa; Minas Gerais; Brazil
| | - Karina A Silva
- Department of Physical Education; Federal University of Viçosa; Viçosa; Minas Gerais; Brazil
| | - Judson F Quintão-Júnior
- Department of Physical Education; Federal University of Viçosa; Viçosa; Minas Gerais; Brazil
| | | | - Hugo L Duarte
- Department of Physical Education; Federal University of Viçosa; Viçosa; Minas Gerais; Brazil
| | - Jader S Cruz
- Department of Biochemistry and Immunology; Federal University of Minas Gerais; Belo Horizonte; Minas Gerais; Brazil
| | - Antonio J Natali
- Department of Physical Education; Federal University of Viçosa; Viçosa; Minas Gerais; Brazil
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