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Teixeira-Fonseca JL, Souza DS, Conceição MRDL, Marques LP, Durço AO, Silva PLD, Joviano-Santos JV, Santos-Miranda A, Roman-Campos D. In vivo tebuconazole administration impairs heart electrical function and facilitates the occurrence of dobutamine-induced arrhythmias: involvement of reactive oxygen species. Food Chem Toxicol 2024; 187:114596. [PMID: 38556154 DOI: 10.1016/j.fct.2024.114596] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2024] [Revised: 03/07/2024] [Accepted: 03/12/2024] [Indexed: 04/02/2024]
Abstract
Tebuconazole (TEB), a widely used pesticide in agriculture to combat fungal infections, is commonly detected in global food, potable water, groundwater, and human urine samples. Despite its known in vivo toxicity, its impact on heart function remains unclear. In a 28-day study on male Wistar rats (approximately 100 g), administering 10 mg/kg/day TEB or a vehicle (control) revealed no effect on body weight gain or heart weight, but an increase in the infarct area in TEB-treated animals. Notably, TEB induced time-dependent changes in in vivo electrocardiograms, particularly prolonging the QT interval after 28 days of administration. Isolated left ventricular cardiomyocytes exposed to TEB exhibited lengthened action potentials and reduced transient outward potassium current. TEB also increased reactive oxygen species (ROS) production in these cardiomyocytes, a phenomenon reversed by N-acetylcysteine (NAC). Furthermore, TEB-treated animals, when subjected to an in vivo dobutamine (Dob) and caffeine (Caf) challenge, displayed heightened susceptibility to severe arrhythmias, a phenotype prevented by NAC. In conclusion, TEB at the no observed adverse effect level (NOAEL) dose adversely affects heart electrical function, increases arrhythmic susceptibility, partially through ROS overproduction, and this phenotype is reversible by scavenging ROS with NAC.
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Affiliation(s)
- Jorge Lucas Teixeira-Fonseca
- Laboratory of CardioBiology, Department of Biophysics, Paulista School of Medicine, Federal University of Sao Paulo, Brazil
| | - Diego Santos Souza
- Laboratory of Heart Biophysics, Department of Physiology, Federal University of Sergipe, São Cristóvão, Brazil
| | | | - Leisiane Pereira Marques
- Laboratory of CardioBiology, Department of Biophysics, Paulista School of Medicine, Federal University of Sao Paulo, Brazil
| | - Aimée Obolari Durço
- Laboratory of CardioBiology, Department of Biophysics, Paulista School of Medicine, Federal University of Sao Paulo, Brazil; Laboratory of Heart Biophysics, Department of Physiology, Federal University of Sergipe, São Cristóvão, Brazil
| | - Polyana Leal da Silva
- Laboratory of CardioBiology, Department of Biophysics, Paulista School of Medicine, Federal University of Sao Paulo, Brazil
| | - Julliane V Joviano-Santos
- Postgraduate Program in Health Sciences, Faculdade Ciências Médicas de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil; Laboratório de Investigações NeuroCardíacas, Ciências Médicas de Minas Gerais (LINC CMMG), Belo Horizonte, Minas Gerais, Brazil
| | - Artur Santos-Miranda
- Department of Physiology and Biophysics, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Danilo Roman-Campos
- Laboratory of CardioBiology, Department of Biophysics, Paulista School of Medicine, Federal University of Sao Paulo, Brazil.
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de Lima Conceição MR, Teixeira-Fonseca JL, Marques LP, Souza DS, da Silva Alcântara F, Orts DJB, Roman-Campos D. Extracellular acidification reveals the antiarrhythmic properties of amiodarone related to late sodium current-induced atrial arrhythmia. Pharmacol Rep 2024:10.1007/s43440-024-00597-2. [PMID: 38619735 DOI: 10.1007/s43440-024-00597-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2023] [Revised: 04/05/2024] [Accepted: 04/08/2024] [Indexed: 04/16/2024]
Abstract
BACKGROUND Amiodarone (AMIO) is an antiarrhythmic drug with the pKa in the physiological range. Here, we explored how mild extracellular pH (pHe) changes shape the interaction of AMIO with atrial tissue and impact its pharmacological properties in the classical model of sea anemone sodium channel neurotoxin type 2 (ATX) induced late sodium current (INa-Late) and arrhythmias. METHOD Isolated atrial cardiomyocytes from male Wistar rats and human embryonic kidney cells expressing SCN5A Na+ channels were used for patch-clamp experiments. Isolated right atria (RA) and left atria (LA) tissue were used for bath organ experiments. RESULTS A more acidophilic pHe caused negative inotropic effects on isolated RA and LA atrial tissue, without modification of the pharmacological properties of AMIO. A pHe of 7.0 changed the sodium current (INa) related components of the action potential (AP), which was enhanced in the presence of AMIO. ATXinduced arrhythmias in isolated RA and LA. Also, ATX prolonged the AP duration and enhanced repolarization dispersion in isolated cardiomyocytes in both pHe 7.4 and pHe 7.0. Pre-incubation of the isolated RA and LA and isolated atrial cardiomyocytes with AMIO prevented arrhythmias induced by ATX only at a pHe of 7.0. Moreover, AMIO was able to block INa-Late induced by ATX only at a pHe of 7.0. CONCLUSION The pharmacological properties of AMIO concerning healthy rat atrial tissue are not dependent on pHe. However, the prevention of arrhythmias induced by INa-Late is pHe-dependent. The development of drugs analogous to AMIO with charge stabilization may help to create more effective drugs to treat arrhythmias related to the INa-Late.
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Affiliation(s)
- Michael Ramon de Lima Conceição
- Laboratory of CardioBiology, Department of Biophysics, Paulista School of Medicine, Federal University of Sao Paulo Botucatu Street, 862, Biological Science Building, 7th floor,, São Paulo, Brazil
| | - Jorge Lucas Teixeira-Fonseca
- Laboratory of CardioBiology, Department of Biophysics, Paulista School of Medicine, Federal University of Sao Paulo Botucatu Street, 862, Biological Science Building, 7th floor,, São Paulo, Brazil
| | - Leisiane Pereira Marques
- Laboratory of CardioBiology, Department of Biophysics, Paulista School of Medicine, Federal University of Sao Paulo Botucatu Street, 862, Biological Science Building, 7th floor,, São Paulo, Brazil
| | - Diego Santos Souza
- Department of Physiology, Federal University of Sergipe, São Cristóvão, Brazil
| | - Fabiana da Silva Alcântara
- Laboratory of CardioBiology, Department of Biophysics, Paulista School of Medicine, Federal University of Sao Paulo Botucatu Street, 862, Biological Science Building, 7th floor,, São Paulo, Brazil
| | - Diego Jose Belato Orts
- Laboratory of CardioBiology, Department of Biophysics, Paulista School of Medicine, Federal University of Sao Paulo Botucatu Street, 862, Biological Science Building, 7th floor,, São Paulo, Brazil
| | - Danilo Roman-Campos
- Laboratory of CardioBiology, Department of Biophysics, Paulista School of Medicine, Federal University of Sao Paulo Botucatu Street, 862, Biological Science Building, 7th floor,, São Paulo, Brazil.
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de Lima Conceição MR, Teixeira-Fonseca JL, Marques LP, Souza DS, Roman-Campos D. Interaction of the antiarrhythmic drug Amiodarone with the sodium channel Na v1.5 depends on the extracellular pH. Eur J Pharmacol 2023; 960:176127. [PMID: 37858835 DOI: 10.1016/j.ejphar.2023.176127] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2023] [Revised: 09/21/2023] [Accepted: 10/16/2023] [Indexed: 10/21/2023]
Abstract
INTRODUCTION Amiodarone (AMD) is a clinically used drug to treat arrhythmias with significant effect upon the cardiac sodium channel Nav1.5. AMD has a pKa of 6.56, and changes in extracellular pH (pHe) may alter its pharmacological properties. Here we explored how changes in pHe impacts the pharmacological properties of AMD upon human-Nav1.5-sodium-current (INa) and in ex vivo rat hearts. METHODS Embryonic-human-kidney-cells (HEK293) were used to transiently express the human alpha-subunit of NaV1.5 channels and the isolated heart of Wistar rats were used. Patch-Clamp technique was deployed to study INa and for electrocardiogram (ECG) evaluation the ex vivo heart preparation in the Langendorff system was applied. RESULTS The potency of AMD upon peak INa was ∼25x higher in pHe 7.0 when compared to pHe 7.4. Voltage dependence for activation did not differ among all groups. AMD shifted the steady-state inactivation curve to more hyperpolarized potentials, with similar magnitudes for both pHes. The recovery from INa inactivation was delayed in the presence of AMD with similar profile in both pHes. Interestingly, the use-dependent properties of AMD was distinct at pHe 7.0 and 7.4. Finally, AMD was able to change the ex vivo ECG profile, however at pHe 7.0+AMD a larger increase in the RR and QRS duration and in the QT interval when compared to pHe 7.4 was found. CONCLUSIONS The pharmacological properties of AMD upon NaV1.5 and isolated heart preparation depends on the pHe and its use in vivo during extracellular acidosis may cause a distinct biological response in the heart tissue.
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Affiliation(s)
| | - Jorge Lucas Teixeira-Fonseca
- Laboratory of CardioBiology, Department of Biophysics, Paulista School of Medicine, Federal University of Sao Paulo, Brazil
| | - Leisiane Pereira Marques
- Laboratory of CardioBiology, Department of Biophysics, Paulista School of Medicine, Federal University of Sao Paulo, Brazil
| | - Diego Santos Souza
- Laboratory of CardioBiology, Department of Biophysics, Paulista School of Medicine, Federal University of Sao Paulo, Brazil; Department of Physiology, Federal University of Sergipe, São Cristóvão, Brazil
| | - Danilo Roman-Campos
- Laboratory of CardioBiology, Department of Biophysics, Paulista School of Medicine, Federal University of Sao Paulo, Brazil.
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Teixeira-Fonseca JL, Joviano-Santos JV, Beserra SS, de Lima Conceição MR, Leal-Silva P, Marques LP, Souza DS, Roman-Campos D. Exploring the involvement of TASK-1 in the control of isolated rat right atrium function from healthy animals and an experimental model of monocrotaline-induced pulmonary hypertension. Naunyn Schmiedebergs Arch Pharmacol 2023; 396:3775-3788. [PMID: 37338577 DOI: 10.1007/s00210-023-02569-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/28/2022] [Accepted: 06/02/2023] [Indexed: 06/21/2023]
Abstract
The TASK-1 channel belongs to the two-pore domain potassium channel family. It is expressed in several cells of the heart, including the right atrial (RA) cardiomyocytes and the sinus node, and TASK-1 channel has been implicated in the pathogenesis of atrial arrhythmias (AA). Thus, using the rat model of monocrotaline-induced pulmonary hypertension (MCT-PH), we explored the involvement of TASK-1 in AA. Four-week-old male Wistar rats were injected with 50 mg/kg of MCT to induce MCT-PH and isolated RA function was studied 14 days later. Additionally, isolated RA from six-week-old male Wistar rats were used to explore the ability of ML365, a selective blocker of TASK-1, to modulate RA function. The hearts developed right atrial and ventricular hypertrophy, inflammatory infiltrate and the surface ECG demonstrated increased P wave duration and QT interval, which are markers of MCT-PH. The isolated RA from the MCT animals showed enhanced chronotropism, faster contraction and relaxation kinetics, and a higher sensibility to extracellular acidification. However, the addition of ML365 to extracellular media was not able to restore the phenotype. Using a burst pacing protocol, the RA from MCT animals were more susceptible to develop AA, and simultaneous administration of carbachol and ML365 enhanced AA, suggesting the involvement of TASK-1 in AA induced by MCT. TASK-1 does not play a key role in the chronotropism and inotropism of healthy and diseased RA; however, it may play a role in AA in the MCT-PH model.
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Affiliation(s)
- Jorge Lucas Teixeira-Fonseca
- Laboratory of Cardiobiology, Department of Biophysics, Paulista School of Medicina, Federal University of Sao Paulo, Botucatu Street, 862, Biological Science Building, 7th floor, São Paulo, São Paulo, Brazil
| | - Julliane V Joviano-Santos
- Post-Graduate Program in Health Sciences, Faculdade Ciências Médicas de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Samuel Santos Beserra
- Laboratory of Cardiobiology, Department of Biophysics, Paulista School of Medicina, Federal University of Sao Paulo, Botucatu Street, 862, Biological Science Building, 7th floor, São Paulo, São Paulo, Brazil
| | - Michael Ramon de Lima Conceição
- Laboratory of Cardiobiology, Department of Biophysics, Paulista School of Medicina, Federal University of Sao Paulo, Botucatu Street, 862, Biological Science Building, 7th floor, São Paulo, São Paulo, Brazil
| | - Polyana Leal-Silva
- Laboratory of Cardiobiology, Department of Biophysics, Paulista School of Medicina, Federal University of Sao Paulo, Botucatu Street, 862, Biological Science Building, 7th floor, São Paulo, São Paulo, Brazil
| | - Leisiane Pereira Marques
- Laboratory of Cardiobiology, Department of Biophysics, Paulista School of Medicina, Federal University of Sao Paulo, Botucatu Street, 862, Biological Science Building, 7th floor, São Paulo, São Paulo, Brazil
| | - Diego Santos Souza
- Laboratory of Cardiobiology, Department of Biophysics, Paulista School of Medicina, Federal University of Sao Paulo, Botucatu Street, 862, Biological Science Building, 7th floor, São Paulo, São Paulo, Brazil
| | - Danilo Roman-Campos
- Laboratory of Cardiobiology, Department of Biophysics, Paulista School of Medicina, Federal University of Sao Paulo, Botucatu Street, 862, Biological Science Building, 7th floor, São Paulo, São Paulo, Brazil.
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Durço AO, Mota KO, Conceição LSR, Souza DS. The albumin, the hydrogen, the carbon dioxide, and the bicarbonate: four substances and a conflict. J Appl Physiol (1985) 2023; 135:1180. [PMID: 37971235 DOI: 10.1152/japplphysiol.00616.2023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2023] [Accepted: 09/04/2023] [Indexed: 11/19/2023] Open
Affiliation(s)
- Aimée Obolari Durço
- Health Science Graduate Program, Federal University of Sergipe, Aracaju, Brazil
| | | | | | - Diego Santos Souza
- Department of Physiology, Federal University of Sergipe, São Cristóvão, Brazil
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Teixeira-Fonseca JL, Santos-Miranda A, Marques ILS, Marques LP, Alcantara F, de Lima Conceição MR, Souza DS, Santana Gondim AN, Roman-Campos D. Eugenol delays the onset of ouabain-induced ventricular cardiac arrhythmias in guinea pigs. Basic Clin Pharmacol Toxicol 2023; 133:565-575. [PMID: 37675641 DOI: 10.1111/bcpt.13941] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2023] [Revised: 08/22/2023] [Accepted: 09/01/2023] [Indexed: 09/08/2023]
Abstract
Eugenol is an aromatic compound used in the manufacture of medicines, perfumes, cosmetics and as an anaesthetic due to the ability of the drug to block the neuronal isoform of voltage-gated Na+ channels (NaV ). Some arrhythmias are associated with gain of function in the sodium current (INa ) found in cardiomyocytes, and antiarrhythmic sodium channel blockers are commonly used in the clinical practice. This study sought to elucidate the potential mechanisms of eugenol's protection in the arrhythmic model of ouabain-induced arrhythmias in guinea pig heart. Ex vivo arrhythmias were induced using 50 μM of ouabain. The antiarrhythmic properties of eugenol were evaluated in the ex vivo heart preparation and isolated ventricular cardiomyocytes. The compound's effects on cardiac sodium current and action potential using the patch-clamp technique were evaluated. In all, eugenol decreased the ex vivo cardiac arrhythmias induced by ouabain. Furthermore, eugenol showed concentration dependent effect upon peak INa , left-shifted the stationary inactivation curve and delayed the recovery from inactivation of the INa . All these aspects are considered to be antiarrhythmic. Our findings demonstrate that eugenol has antiarrhythmic activity, which may be partially explained by the ability of eugenol to change de biophysical properties of INa of cardiomyocytes.
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Affiliation(s)
- Jorge Lucas Teixeira-Fonseca
- Laboratório de Cardiobiologia, Departamento de Biofísica, Universidade Federal de São Paulo (UNIFESP), São Paulo, São Paulo, Brazil
| | - Artur Santos-Miranda
- Departamento de Fisiologia, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | | | - Leisiane Pereira Marques
- Laboratório de Cardiobiologia, Departamento de Biofísica, Universidade Federal de São Paulo (UNIFESP), São Paulo, São Paulo, Brazil
| | - Fabiana Alcantara
- Laboratório de Cardiobiologia, Departamento de Biofísica, Universidade Federal de São Paulo (UNIFESP), São Paulo, São Paulo, Brazil
| | - Michael Ramon de Lima Conceição
- Laboratório de Cardiobiologia, Departamento de Biofísica, Universidade Federal de São Paulo (UNIFESP), São Paulo, São Paulo, Brazil
| | - Diego Santos Souza
- Laboratório de Cardiobiologia, Departamento de Biofísica, Universidade Federal de São Paulo (UNIFESP), São Paulo, São Paulo, Brazil
| | - Antonio Nei Santana Gondim
- Laboratório de Biofísica e Farmacologia do Coração, Departamento de Educação (Campus-XII), Universidade do Estado da Bahia (UNEB), Guanambi, Brazil
| | - Danilo Roman-Campos
- Laboratório de Cardiobiologia, Departamento de Biofísica, Universidade Federal de São Paulo (UNIFESP), São Paulo, São Paulo, Brazil
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Durço AO, Marques LP, Souza DS. Channels wars: return of the single-channel. J Physiol 2023; 601:3993-3994. [PMID: 37598297 DOI: 10.1113/jp285358] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2023] [Accepted: 08/10/2023] [Indexed: 08/21/2023] Open
Affiliation(s)
- Aimée Obolari Durço
- Health Science Graduate Program, Federal University of Sergipe, Aracaju, Brazil
- Department of Physiology, Federal University of Sergipe, Aracaju, Brazil
| | | | - Diego Santos Souza
- Department of Physiology, Federal University of Sergipe, Aracaju, Brazil
- Department of Biophysics, Federal University of São Paulo, São Paulo, Brazil
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Durço AO, Souza DS, Rhana P, Costa AD, Marques LP, Santos LABO, de Souza Araujo AA, de Aragão Batista MV, Roman-Campos D, Santos MRVD. d-Limonene complexed with cyclodextrin attenuates cardiac arrhythmias in an experimental model of doxorubicin-induced cardiotoxicity: Possible involvement of calcium/calmodulin-dependent protein kinase type II. Toxicol Appl Pharmacol 2023; 474:116609. [PMID: 37392997 DOI: 10.1016/j.taap.2023.116609] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [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: 03/26/2023] [Revised: 06/15/2023] [Accepted: 06/26/2023] [Indexed: 07/03/2023]
Abstract
BACKGROUND Arrhythmias are one manifestation of the cardiotoxicity that results from doxorubicin (Doxo) administration. Although cardiotoxicity is an anticipated outcome in anticancer therapies, there is still a lack of treatment options available for its effective management. This study sought to evaluate the possible cardioprotective effect of complex d-limonene (DL) plus hydroxypropyl-β-cyclodextrin (HβDL) during treatment with Doxo, focusing on the arrhythmic feature. METHODS Cardiotoxicity was induced in Swiss mice with Doxo 20 mg/kg, with 10 mg/kg of HβDL being administered 30 min before the Doxo. Plasma CK-MB and LDH levels were analyzed. Cellular excitability and susceptibility to cardiac and cardiomyocyte arrhythmias were evaluated using in vivo (pharmacological cardiac stress) and in vitro (burst pacing) ECG protocols. Ca2+ dynamics were also investigated. The expression of CaMKII and its activation by phosphorylation and oxidation were evaluated by western blot, and molecular docking was used to analyze the possible interaction between DL and CaMKII. RESULTS Electrocardiograms showed that administration of 10 mg/kg of HβDL prevented Doxo-induced widening of the QRS complex and QT interval. HβDL also prevented cardiomyocyte electrophysiological changes that trigger cellular arrhythmias, such as increases in action potential duration and variability; decreased the occurrence of delayed afterdepolarizations (DADs) and triggered activities (TAs), and reduced the incidence of arrhythmia in vivo. Ca2+ waves and CaMKII overactivation caused by phosphorylation and oxidation were also decreased. In the in silico study, DL showed potential inhibitory interaction with CaMKII. CONCLUSION Our results show that 10 mg/kg of βDL protects the heart against Doxo-induced cardiotoxicity arrhythmias, and that this is probably due to its inhibitory effect on CaMKII hyperactivation.
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Affiliation(s)
- Aimée Obolari Durço
- Health Science Graduate Program, Federal University of Sergipe, Aracaju, Brazil
| | - Diego Santos Souza
- Department of Biophysics, Federal University of São Paulo, São Paulo, Brazil
| | - Paula Rhana
- Department of Physiology and Membrane Biology, University of California, Davis, USA
| | | | | | | | - Adriano Antunes de Souza Araujo
- Health Science Graduate Program, Federal University of Sergipe, Aracaju, Brazil; Department of Pharmacy, Federal University of Sergipe, São Cristóvão, Brazil
| | | | - Danilo Roman-Campos
- Department of Biophysics, Federal University of São Paulo, São Paulo, Brazil
| | - Marcio Roberto Viana Dos Santos
- Health Science Graduate Program, Federal University of Sergipe, Aracaju, Brazil; Department of Physiology, Federal University of Sergipe, São Cristóvão, Brazil.
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Durço AO, Conceição LSR, Souza DS. Albumin: to be, or not to be, a buffer, that is the question. J Appl Physiol (1985) 2023; 135:201. [PMID: 37368369 DOI: 10.1152/japplphysiol.00288.2023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2023] [Accepted: 05/08/2023] [Indexed: 06/28/2023] Open
Affiliation(s)
- Aimée Obolari Durço
- Health Science Graduate Program, Federal University of Sergipe, Aracaju, Brazil
| | | | - Diego Santos Souza
- Department of Biophysics, Federal University of Sao Paulo, Sao Paulo, Brazil
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Santos LRD, Souza DS, Mesquita TRR, Dantas CO, Araujo AM, Cerqueira SVSD, Santos VCDO, Mota KO, Vasconcelos CMLD. Naringin promotes positive inotropism in atrial tissue through β-AR/PKA-dependent pathway. Sci Plena 2023. [DOI: 10.14808/sci.plena.2023.024901] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/17/2023] Open
Abstract
Naringin is a flavonoid glycoside found in citrus fruits and grapes with a wide range of therapeutic actions. We aimed to study the inotropic effect of naringin on rat-isolated atria, dissecting intracellular mechanisms involved in this response. Concentration-response curves of naringin (0.003-6 mM) were obtained before and after pre-incubation with selective antagonists. Our results showed that naringin presented a biphasic inotropic response, with a positive inotropic effect at low and middle concentrations (0.003-2.0 mM), and a negative inotropic effect at high concentrations (above 3 mM). Pre-incubation with propranolol or atenolol (β-adrenergic receptors antagonists, β-AR), H89 (protein kinase-A inhibitor, PKA), nifedipine (L-type Ca2+ channel blocker), or ryanodine (ryanodine receptor inhibitor) fully abolished the positive inotropic effect induced by naringin. Pre-treatment of animals with reserpine, catecholamine-depleting drug, also prevented the increase of atrial contractility evoked by naringin. Altogether, we show that naringin causes a positive inotropic effect in isolated atria through β-AR/PKA-dependent pathway.
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Souza DS, Chignalia AZ, Carvalho-de-Souza JL. Modulation of cardiac voltage-activated K + currents by glypican 1 heparan sulfate proteoglycan. Life Sci 2022; 308:120916. [PMID: 36049528 DOI: 10.1016/j.lfs.2022.120916] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2022] [Revised: 08/15/2022] [Accepted: 08/24/2022] [Indexed: 11/20/2022]
Abstract
BACKGROUND Glypican 1 (Gpc1) is a heparan sulfate proteoglycan attached to the cell membrane via a glycosylphosphatidylinositol anchor, where it holds glycosaminoglycans nearby. We have recently shown that Gpc1 knockout (Gpc1-/-) mice feature decreased systemic blood pressure. To date, none has been reported regarding the role of Gpc1 on the electrical properties of the heart and specifically, in regard to a functional interaction between Gpc1 and voltage-gated K+ channels. METHODS We used echocardiography and in vivo (electrocardiographic recordings) and in vitro (patch clamping) electrophysiology to study mechanical and electric properties of mice hearts. We used RT-PCR to probe K+ channels' gene transcription in heart tissue. RESULTS Gpc1-/- hearts featured increased cardiac stroke volume and preserved ejection fraction. Gpc1-/- electrocardiograms showed longer QT intervals, abnormalities in the ST segment, and delayed T waves, corroborated by longer action potentials in isolated ventricular cardiomyocytes. In voltage-clamp, these cells showed decreased Ito and IK voltage-activated K+ current densities. Moreover, IK showed activation at less negative voltages, but a higher level of inactivation at a given membrane potential. Kcnh2 and Kcnq1 voltage-gated K+ channels subunits' transcripts were remarkably more abundant in heart tissues from Gpc1-/- mice, suggesting that Gpc1 may interfere in the steps between transcription and translation in these cases. CONCLUSION Our data reveals an unprecedented connection between Gpc1 and voltage-gated K+ channels expressed in the heart and this knowledge contributes to the understanding of the role of this HSPG in cardiac function which may play a role in the development of cardiovascular disease.
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Affiliation(s)
- Diego Santos Souza
- Department of Anesthesiology, College of Medicine, University of Arizona, Tucson, AZ 85724, USA
| | - Andreia Zago Chignalia
- Department of Anesthesiology, College of Medicine, University of Arizona, Tucson, AZ 85724, USA; Department of Physiology, College of Medicine University of Arizona, Tucson, AZ 85724, USA; Department of Pharmacology and Toxicology, College of Pharmacy, University of Arizona, Tucson, AZ 85724, USA
| | - Joao Luis Carvalho-de-Souza
- Department of Anesthesiology, College of Medicine, University of Arizona, Tucson, AZ 85724, USA; Department of Physiology, College of Medicine University of Arizona, Tucson, AZ 85724, USA; Department of Ophthalmology and Visual Sciences, College of Medicine, University of Arizona, Tucson, AZ 85724, USA; BIO5 Institute, University of Arizona, Tucson, AZ 85724, USA.
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Pina LTS, Rabelo TK, Trindade GGG, Almeida IKS, Oliveira MA, Dos Santos PL, Souza DS, de Menezes-Filho JER, de Vasconcelos CML, Santos SL, Scotti L, Scotti MT, Araújo AAS, Quintans JSS, Quintans LJ, Guimarães AG. γ-Terpinene complexed with β-cyclodextrin attenuates spinal neuroactivity in animals with cancer pain by Ca2+ channel block. J Pharm Pharmacol 2022; 74:1629-1639. [PMID: 35976257 DOI: 10.1093/jpp/rgac052] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2022] [Accepted: 06/30/2022] [Indexed: 11/13/2022]
Abstract
OBJECTIVES Considering that γ-terpinene (γ-TPN) is a monoterpene found in Cannabis oil, with high lipophilicity and limited pharmacokinetics, our objective was to evaluate whether its complexation in β-cyclodextrin (γ-TPN/β-CD) could improve its physicochemical properties and action on cancer pain, as well as verify the mechanisms of action involved. METHODS The γ-TPN/β-CD was prepared and submitted to physicochemical characterization. Animals with sarcoma 180 were treated (vehicle, γ-TPN 50 mg/kg, γ-TPN/β-CD 5 mg/kg or morphine) and assessed for hyperalgesia, TNF-α and IL-1β levels, iNOS and c-Fos activity. The effects of γ-TPN on calcium channels were studied by patch-clamp and molecular docking. RESULTS β-CD improved the physicochemical properties and prolonged the anti-hyperalgesic effect of γ-TPN. This compound also reduced the levels of IL-1β, TNF-α and iNOS in the tumour, and c-Fos protein in the spinal cord. In addition, it reduced Ca2+ current, presenting favourable chemical interactions with different voltage-dependent calcium channels. CONCLUSION These results indicate that the complexation of γ-TPN into β-CD increases its stability and time effect, reducing spinal neuroactivity and inflammation by blocking calcium channels.
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Affiliation(s)
- Lícia T S Pina
- Department of Pharmacy, Federal University of Sergipe, São Cristóvão, Sergipe, Brazil
| | - Thallita K Rabelo
- Sunnybrook Research Institute. Harquail Centre for Neuromodulation, Canada
| | - Gabriela G G Trindade
- Department of Pharmacy, Federal University of Sergipe, São Cristóvão, Sergipe, Brazil
| | - Iggo K S Almeida
- Department of Pharmacy, Federal University of Sergipe, São Cristóvão, Sergipe, Brazil
| | - Marlange A Oliveira
- Department of Physiology, Federal University of Sergipe, São Cristóvão, Sergipe, Brazil
| | - Priscila L Dos Santos
- Department of Physiology, Federal University of Sergipe, São Cristóvão, Sergipe, Brazil
| | - Diego Santos Souza
- Department of Biophysics and Immunology, Federal University of Minas Gerais, Brazil.,Department of Biophysics, Federal University of São Paulo, São Paulo, Brazil
| | | | | | - Sandra L Santos
- Department of Physiology, Federal University of Sergipe, São Cristóvão, Sergipe, Brazil
| | - Luciana Scotti
- Federal University of Paraiba, João Pessoa, Paraíba, Brazil
| | | | - Adriano A S Araújo
- Department of Pharmacy, Federal University of Sergipe, São Cristóvão, Sergipe, Brazil
| | - Jullyana S S Quintans
- Department of Physiology, Federal University of Sergipe, São Cristóvão, Sergipe, Brazil
| | - Lucindo J Quintans
- Department of Physiology, Federal University of Sergipe, São Cristóvão, Sergipe, Brazil
| | - Adriana G Guimarães
- Department of Pharmacy, Federal University of Sergipe, São Cristóvão, Sergipe, Brazil
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Silva GBAD, Souza DS, Menezes-Filho JER, Silva-Neto JAD, Cruz JDS, Roman-Campos DR, Quintans-Júnior LJ, Vasconcelos CMLD. (-)-Carvone Modulates Intracellular Calcium Signaling with Antiarrhythmic Action in Rat Hearts. Arq Bras Cardiol 2022; 119:294-304. [PMID: 35946691 PMCID: PMC9363060 DOI: 10.36660/abc.20210499] [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] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2021] [Accepted: 12/08/2021] [Indexed: 11/23/2022] Open
Abstract
Fundamento: A (-)-carvona é um monoterpeno encontrado em óleos essenciais com atividade antioxidante e anti-inflamátoria. Objetivos: O objetivo deste estudo foi analisar a propriedade antiarrítmica da (-)-carvona no coração de rato e seus efeitos sobre a sinalização de Ca+2 intracelular. Métodos: Os efeitos da (-)-carvona foram avaliados sobre a contratilidade atrial (0,01 – 4 mM) e ventricular (0,5 mM), e no eletrocardiograma (0,5mM). A fração de encurtamento, a corrente de cálcio do tipo L (ICa,L) e a sinalização de Ca+2 foram medidas no cardiomiócito isolado (0,5 mM). O efeito antiarrítmico foi avaliado no modelo de arritmia induzida por sobrecarga de cálcio (0,5 mM) (n = 5). Um p < 0,05 foi adotado como nível de significância estatística. Resultados: No átrio, a (-)-carvona causou inotropismo negativo de maneira concentração-dependente (EC50 0,44 ± 0,11 mM) e diminuiu o inotropismo positivo induzido pelo CaCl2 (0,1 – 8,0 mM) e BAY K8644 (5 - 500 nM), um agonista de canal de cálcio do tipo L. Em coração isolado, a (-)-carvona (0,5mM) reduziu a contratilidade ventricular em 73% e a frequência cardíaca (em 46%), aumentou o Pri (30,7%, tempo desde o início da onda P até a onda R) e o QTc (9,2%, uma medida de despolarização e repolarização dos ventrículos), sem mudar a duração do complexo QRS. A (-)-carvona diminuiu a fração de encurtamento (61%), a (ICa,L) (79%) e o transiente intracelular de Ca+2 (38%). Além disso, a (-)-carvona apresentou ação antiarrítmica, identificada pela redução do escore de arritmia (85%) e ocorrência de fibrilação ventricular. Conclusão: A (-)-carvona reduz a entrada de Ca+2 através de canais de Ca+2 do tipo L e, assim, diminui a contratilidade cardíaca e o Ca+2 intracelular e apresenta promissora atividade antiarrítmica no coração de ratos.
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Affiliation(s)
| | | | | | | | - Jader Dos Santos Cruz
- Universidade Federal de Minas Gerais - Instituto de Ciências Biológicas, Belo Horizonte, MG - Brasil
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Rhana P, Barros GM, Santos VCDO, Costa AD, Santos DMD, Fernandes-Braga W, Durço AO, Santos MRV, Roman-Campos D, Vasconcelos CMLD, Cruz JS, Souza DS. S-limonene protects the heart in an experimental model of myocardial infarction induced by isoproterenol: Possible involvement of mitochondrial reactive oxygen species. Eur J Pharmacol 2022; 930:175134. [PMID: 35843301 DOI: 10.1016/j.ejphar.2022.175134] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2022] [Revised: 06/19/2022] [Accepted: 06/30/2022] [Indexed: 11/03/2022]
Abstract
BACKGROUND Myocardial infarction (MI) is associated with high mortality rates, despite the fact that there are therapies available. Importantly, excessive oxidative stress may contribute to ischemia/reperfusion injury leading to death related to MI. In this scenario, naturally occurring antioxidant compounds are an important source of possible therapeutic intervention. Thus, this study sought to elucidate the mechanisms of cardioprotection of s-limonene in an isoproterenol-induced MI animal model. METHODS Wistar rats were treated with 1 mg/kg s-limonene (SL) or 100 mg/kg N-acetylcysteine (NAC, positive control) once, 30 min after isoproterenol-induced MI (applied in two doses with a 24 h interval). The protective effects of SL in the heart were examined via the serum level of creatine kinase myocardial band (CK-MB), electrocardiographic profile, infarct size and histological parameters. Using isolated cardiomyocytes, we also assessed calcium transient amplitude, cytosolic and mitochondrial oxidative stress and the expression of proteins related to oxidative stress. RESULTS SL at a concentration of 1 mg/kg attenuated isoproterenol-induced MI injury, by preventing ST-segment elevation and QTc prolongation in the ECG. SL reduced the infarct size and collagen content in cardiac tissue. At the cellular level, SL prevented increased Ca2+, associated with attenuation of cytosolic and mitochondrial oxidative stress. These changes resulted in a reduction of the oxidized form of Ca2+ Calmodulin-Dependent Kinase II (CaMKII) and restored superoxide dismutase and glutathione peroxidase activity. CONCLUSION Our data show that s-limonene promotes cardioprotection against MI injury, probably through inhibition of increased Ca2+ and attenuation of oxidative stress via CaMKII.
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Affiliation(s)
- Paula Rhana
- Department of Physiology and Membrane Biology, University of California Davis, Davis, USA; Department of Biochemistry and Immunology, Federal University of Minas Gerais, Belo Horizonte, Brazil
| | | | | | - Alexandre Dantas Costa
- Department of Physiology and Biophysics, Federal University of Minas Gerais, Belo Horizonte, Brazil
| | - Danillo Menezes Dos Santos
- Department of Physiology, Federal University of Sergipe, São Cristóvão, Brazil; Health Science Graduate Program, Federal University of Sergipe, Aracaju, Brazil
| | - Weslley Fernandes-Braga
- Department of Biochemistry and Immunology, Federal University of Minas Gerais, Belo Horizonte, Brazil
| | - Aimée Obolari Durço
- Department of Physiology, Federal University of Sergipe, São Cristóvão, Brazil; Health Science Graduate Program, Federal University of Sergipe, Aracaju, Brazil
| | - Márcio Roberto Viana Santos
- Department of Physiology, Federal University of Sergipe, São Cristóvão, Brazil; Health Science Graduate Program, Federal University of Sergipe, Aracaju, Brazil
| | - Danilo Roman-Campos
- Department of Biophysics, Federal University of São Paulo, São Paulo, Brazil
| | | | - Jader Santos Cruz
- Department of Biochemistry and Immunology, Federal University of Minas Gerais, Belo Horizonte, Brazil.
| | - Diego Santos Souza
- Department of Biophysics, Federal University of São Paulo, São Paulo, Brazil.
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Souza DS, Durço AO, Rocha CSG, Conceição LSR. COVID-19 and the Beat-To-Beat Heart. International Journal of Cardiovascular Sciences 2022. [DOI: 10.36660/ijcs.20210269] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
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16
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Souza DS, Roman-Campos D. A Importância dos Estudos de Evolução Temporal Usando Modelos Experimentais de Doenças Cardíacas. Arq Bras Cardiol 2022; 118:476-477. [PMID: 35262583 PMCID: PMC8856695 DOI: 10.36660/abc.20210997] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
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17
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Roman-Campos D, Sales-Junior P, Costa AD, Souza DS, Santos-Miranda A, Joviano-Santos JV, Ropert C, Cruz JS. Impact of IFN-γ Deficiency on the Cardiomyocyte Function in the First Stage of Experimental Chagas Disease. Microorganisms 2022; 10:microorganisms10020271. [PMID: 35208732 PMCID: PMC8874532 DOI: 10.3390/microorganisms10020271] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2021] [Revised: 01/10/2022] [Accepted: 01/23/2022] [Indexed: 12/10/2022] Open
Abstract
Chagas disease (CD) is caused by the parasitic protozoan T. cruzi. The progression of CD in ~30% of patients results in Chagasic Cardiomyopathy (CCM). Currently, it is known that the inflammatory system plays a significant role in the CCM. Interferon-gamma (IFN-γ) is the major cytokine involved in parasitemia control but has also been linked to CCM. The L-type calcium current (ICa,L) is crucial in the excitation/contraction coupling in cardiomyocytes. Thus, we compared ICa,L and the mechanical properties of cardiomyocytes isolated from infected wild type (WT) and IFN-γ(−/−) mice in the first stage of T. cruzi infection. Using the patch clamp technique, we demonstrated that the infection attenuated ICa,L in isolated cardiomyocytes from the right and left ventricles of WT mice at 15 days post-infection (dpi), which was not observed in the IFN-γ(−/−) cardiomyocytes. However, ICa,L was attenuated between 26 and 30 dpi in both experimental groups. Interestingly, the same profile was observed in the context of the mechanical properties of isolated cardiomyocytes from both experimental groups. Simultaneously, we tracked the mortality and MCP-1, TNF-α, IL-12, IL-6, and IL-10 serum levels in the infected groups. Importantly, the IFN-γ(−/−) and WT mice presented similar parasitemia and serum inflammatory markers at 10 dpi, indicating that the modifications in the cardiomyocyte functions observed at 15 dpi were directly associated with IFN-γ(−/−) deficiency. Thus, we showed that IFN-γ plays a crucial role in the electromechanical remodeling of cardiomyocytes during experimental T. cruzi infection in mice.
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Affiliation(s)
- Danilo Roman-Campos
- Laboratório de Cardiobiologia, Department of Biophysics, Federal University of São Paulo, São Paulo 04021, Brazil; (D.S.S.); (A.S.-M.); (J.V.J.-S.)
- Correspondence: (D.R.-C.); (J.S.C.)
| | | | - Alexandre D. Costa
- Laboratório de Membranas Excitáveis e de Biologia Cardíaca, Department of Biochemistry and Immunology, Federal University of Minas Gerais, Belo Horizonte 31270, Brazil; (A.D.C.); (C.R.)
| | - Diego Santos Souza
- Laboratório de Cardiobiologia, Department of Biophysics, Federal University of São Paulo, São Paulo 04021, Brazil; (D.S.S.); (A.S.-M.); (J.V.J.-S.)
| | - Artur Santos-Miranda
- Laboratório de Cardiobiologia, Department of Biophysics, Federal University of São Paulo, São Paulo 04021, Brazil; (D.S.S.); (A.S.-M.); (J.V.J.-S.)
| | - Julliane V. Joviano-Santos
- Laboratório de Cardiobiologia, Department of Biophysics, Federal University of São Paulo, São Paulo 04021, Brazil; (D.S.S.); (A.S.-M.); (J.V.J.-S.)
| | - Catherine Ropert
- Laboratório de Membranas Excitáveis e de Biologia Cardíaca, Department of Biochemistry and Immunology, Federal University of Minas Gerais, Belo Horizonte 31270, Brazil; (A.D.C.); (C.R.)
| | - Jader S. Cruz
- Laboratório de Membranas Excitáveis e de Biologia Cardíaca, Department of Biochemistry and Immunology, Federal University of Minas Gerais, Belo Horizonte 31270, Brazil; (A.D.C.); (C.R.)
- Correspondence: (D.R.-C.); (J.S.C.)
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Affiliation(s)
- Diego Santos Souza
- Universidade Federal de São PauloEscola Paulista de MedicinaDepartamento de BiofísicaSão PauloSPBrasilLaboratório de CardioBiologia, Departamento de Biofísica, Escola Paulista de Medicina, Universidade Federal de São Paulo, São Paulo, SP – Brasil
| | - Danilo Roman-Campos
- Universidade Federal de São PauloEscola Paulista de MedicinaDepartamento de BiofísicaSão PauloSPBrasilLaboratório de CardioBiologia, Departamento de Biofísica, Escola Paulista de Medicina, Universidade Federal de São Paulo, São Paulo, SP – Brasil
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19
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Miguel-Dos-Santos R, Souza DS, Mesquita T. Fine-tuning SERCA activity to treat distinct heart failure syndromes. J Physiol 2021; 599:4253-4254. [PMID: 34387381 PMCID: PMC11033692 DOI: 10.1113/jp282044] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2021] [Accepted: 08/09/2021] [Indexed: 11/08/2022] Open
Affiliation(s)
| | - Diego Santos Souza
- Department of Biophysics, Federal University of São Paulo, São Paulo, Brazil
| | - Thássio Mesquita
- Smidt Heart Institute, Cedars-Sinai Medical Center, Los Angeles, USA
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20
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Durço AO, Souza DS, Almeida IB, Sombrio LS, Santos MRV. Stress in healthcare workers in Hospitals and Emergency Care Units in Sergipe public health service during COVID-19 pandemic time. Sci Plena 2021. [DOI: 10.14808/sci.plena.2021.077501] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
The objective of this work was to assess the stress in healthcare workers (HCW) and its correlation with perception of stressors in their work environments - hospitals and emergency care units in the public health system in the state of Sergipe, Brazil, during the COVID-19 pandemic. This is a cross-sectional study carried out by non-probabilistic sampling with 58 HCW, using specific questionnaires and a validated scale (Job Stress Scale) about sociodemographic issues, job stress and COVID-19. Using the demand-control-support assessment model, the work performed was classified as passive, active, low strain and high strain, according work's demand and the range of decision-making freedom. Estimated correlations between each questionnaire were performed using Pearson's correlation coefficient through SPSS software, and descriptive statistics, through Excel. Most of the participants were shown to be under high psychological demand (93.10%) and found themselves with high control (89.66%). Some factors affected the HCW’s perception of social support in the workplace, these were their team’s knowledge about COVID-19, the availability of personal protective equipment, and their physical comfort while using it. HCW were involved in active work; although they were not in the worst scenario in relation to psychological stress, they were still under great psychological strain, which reinforces the need to adopt effective measures to reduce it.
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Fedotenko T, Souza DS, Khandarkhaeva S, Dubrovinsky L, Dubrovinskaia N. Isothermal equation of state of crystalline and glassy materials from optical measurements in diamond anvil cells. Rev Sci Instrum 2021; 92:063907. [PMID: 34243540 DOI: 10.1063/5.0050190] [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] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/12/2021] [Accepted: 06/05/2021] [Indexed: 06/13/2023]
Abstract
Here, we present a method to study the equation of state of opaque amorphous and crystalline materials in diamond anvil cells. The approach is based on measurements of sample dimensions using high-resolution optical microscopy. Data on the volumetric strain as a function of pressure allow deriving the isothermal equation of state of the studied material. The analysis of optical images is fully automatized and allows measuring the sample dimensions with the precision of about 60 nm. The methodology was validated by studying isothermal compression of ω-Ti up to 30 GPa in a Ne pressure transmitting medium. Within the accuracy of the measurements, the bulk modulus of ω-Ti determined using optical microscopy was similar to that obtained from x-ray diffraction. For glassy carbon compressed to ∼30 GPa, the previously unknown bulk modulus was found to be equal to K0 = 28 (2) GPa [K' = 5.5(5)].
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Affiliation(s)
- T Fedotenko
- Material Physics and Technology at Extreme Conditions, Laboratory of Crystallography, University of Bayreuth, D-95440 Bayreuth, Germany
| | - D S Souza
- Bayerisches Geoinstitut Universität Bayreuth, D-95440 Bayreuth, Germany
| | - S Khandarkhaeva
- Material Physics and Technology at Extreme Conditions, Laboratory of Crystallography, University of Bayreuth, D-95440 Bayreuth, Germany
| | - L Dubrovinsky
- Bayerisches Geoinstitut Universität Bayreuth, D-95440 Bayreuth, Germany
| | - N Dubrovinskaia
- Material Physics and Technology at Extreme Conditions, Laboratory of Crystallography, University of Bayreuth, D-95440 Bayreuth, Germany
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Elasoru SE, Rhana P, de Oliveira Barreto T, Naves de Souza DL, Menezes-Filho JER, Souza DS, Loes Moreira MV, Gomes Campos MT, Adedosu OT, Roman-Campos D, Melo MM, Cruz JS. Andrographolide protects against isoproterenol-induced myocardial infarction in rats through inhibition of L-type Ca 2+ and increase of cardiac transient outward K + currents. Eur J Pharmacol 2021; 906:174194. [PMID: 34044012 DOI: 10.1016/j.ejphar.2021.174194] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2021] [Revised: 04/09/2021] [Accepted: 05/12/2021] [Indexed: 10/21/2022]
Abstract
Myocardial infarction (MI) is the irreversible injury of the myocardium caused by prolonged myocardial ischemia and is a major cause of heart failure and eventual death among ischemic patients. The present study assessed the protective potentials of andrographolide against isoproterenol-induced myocardial infarction in rats. Animals were randomly divided into four groups: Control (Ctr) group received 0.9% saline solution once daily for 21 days, Isoproterenol (Iso) group received 0.9% saline solution once daily for 19 days followed by 80 mg/kg/day of isoproterenol hydrochloride solution on day 20 and 21, Andrographolide (Andro) group received 20 mg/kg/day of andrographolide for 21 days, and Andrographolide plus Isoproterenol (Andro + Iso) group received 20 mg/kg/day of andrographolide for 21 days with co-administration of 80 mg/kg/day of isoproterenol hydrochloride solution on day 20 and 21. After all treatments, cardiac-specific parameters that define cardiac health and early subacute MI were measured in all groups using both biophysical and pharmacological assay methods. Isoproterenol administration significantly (P < 0.05) increased cardiac mass indexes, systemic cardiac biomarkers, infarct size and caused cardiac histological alterations; significantly (P < 0.05) increased heart rate, QRS & QTc intervals and caused ST-segment elevation; significantly (P < 0.05) increased myocytes shortening, action potential duration (APD), L-type Ca2+ current (ICa,L) density and significantly (P < 0.05) decreased transient outward K+ current (Ito) density typical of the early subacute MI. Interestingly, pretreatment with andrographolide prevented and or minimized these anomalies, notably, by reducing ICa,L density and increasing Ito density significantly. Therefore, andrographolide could be seen as a promising therapeutic agent capable of making the heart resistant to early subacute infarction and it could be used as template for the development of semisynthetic drug(s) for cardiac protection against MI.
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Affiliation(s)
- Seyi Elijah Elasoru
- Department of Biochemistry and Immunology, Institute of Biological Science, Federal University of Minas Gerais, Belo Horizonte, Brazil
| | - Paula Rhana
- Department of Biochemistry and Immunology, Institute of Biological Science, Federal University of Minas Gerais, Belo Horizonte, Brazil
| | - Tatiane de Oliveira Barreto
- Department of Biochemistry and Immunology, Institute of Biological Science, Federal University of Minas Gerais, Belo Horizonte, Brazil
| | - Dayane Lorena Naves de Souza
- Department of Biochemistry and Immunology, Institute of Biological Science, Federal University of Minas Gerais, Belo Horizonte, Brazil
| | | | - Diego Santos Souza
- Department of Biophysics, Paulista School of Medicine, Federal University of Sao Paulo, Sao Paulo, Brazil
| | - Matheus Vilardo Loes Moreira
- Department of Clinical and Veterinary Surgery, School of Veterinary, Federal University of Minas Gerais, Belo Horizonte, Brazil
| | - Marco Tulio Gomes Campos
- Department of Clinical and Veterinary Surgery, School of Veterinary, Federal University of Minas Gerais, Belo Horizonte, Brazil
| | | | - Danilo Roman-Campos
- Department of Biophysics, Paulista School of Medicine, Federal University of Sao Paulo, Sao Paulo, Brazil
| | - Marilia Martins Melo
- Department of Clinical and Veterinary Surgery, School of Veterinary, Federal University of Minas Gerais, Belo Horizonte, Brazil
| | - Jader Santos Cruz
- Department of Biochemistry and Immunology, Institute of Biological Science, Federal University of Minas Gerais, Belo Horizonte, Brazil.
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Souza DS, Barreto TDO, Menezes-Filho JERD, Heimfarth L, Rhana P, Rabelo TK, Santana MNS, Durço AO, Conceição MRDL, Quintans-Júnior LJ, Guimarães AG, Cruz JS, Vasconcelos CMLD. Myocardial hypertrophy is prevented by farnesol through oxidative stress and ERK1/2 signaling pathways. Eur J Pharmacol 2020; 887:173583. [DOI: 10.1016/j.ejphar.2020.173583] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2020] [Revised: 09/14/2020] [Accepted: 09/15/2020] [Indexed: 12/23/2022]
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Conceição LSR, Gois C, Fernandes RES, Souza DS, Júnior MBG, Carvalho VO. Effect of ivabradine on exercise capacity in individuals with heart failure with preserved ejection fraction. Heart Fail Rev 2020; 26:157-163. [PMID: 32651807 DOI: 10.1007/s10741-020-10002-8] [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] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
The prevalence of heart failure with preserved ejection fraction (HFpEF) is about 30-75% of the patients living with heart failure. A hallmark symptom of these patients is exercise intolerance. Ivabradine can, eventually, increase exercise capacity by heart rate control. However, clinical trials show conflicting results about the effects of ivabradine on exercise capacity, an important prognostic variable. The aim of this study was to investigate the effects of ivabradine on exercise capacity in individuals with HFpEF. This study was conducted following the Preferred Reporting Items for Systematic Reviews and Meta-Analyses statement and supplemented by guidance from the Cochrane Collaboration Handbook for Systematic Reviews of Interventions. For the meta-analysis, a forest plot was used to graphically present the effect sizes and the 95% CIs. Four randomized controlled trials were included. Ivabradine did not change exercise capacity expressed by peak VO2 and 6MWT (MD = 0.8; 95% CI - 2.5 to 4.3; P = 0.62) (Fig. 4a). In our secondary analysis, the ivabradine group showed a significant resting HR reduction when compared with placebo (MD = - 13.2; 95% CI - 16.6 to -9.8; P < 0.00001) and ivabradine showed increased values of E/e' ratio compared with placebo (MD = 0.8; 95% CI 0.0 to 1.6; P = 0.04). Current available evidence suggests that there is no effect of ivabradine on exercise capacity in patients with HFpEF. Also, questions about negative effects on E/e' values and adverse events associated with ivabradine treatment need to be considered in future studies.
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Affiliation(s)
- Lino Sérgio Rocha Conceição
- Department of Physical Therapy and Post-Graduate Program in Health Sciences, Federal University of Sergipe - UFS, Rua Cláudio Batista, s/n. Bairro Sanatório, Aracaju, Sergipe, SE, Brazil. .,The GREAT Group (GRupo de Estudos em ATividade física), Aracaju, Brazil.
| | - Caroline Gois
- Department of Physical Therapy and Post-Graduate Program in Health Sciences, Federal University of Sergipe - UFS, Rua Cláudio Batista, s/n. Bairro Sanatório, Aracaju, Sergipe, SE, Brazil.,The GREAT Group (GRupo de Estudos em ATividade física), Aracaju, Brazil
| | - Raiane Eunice Santos Fernandes
- Department of Physical Therapy and Post-Graduate Program in Health Sciences, Federal University of Sergipe - UFS, Rua Cláudio Batista, s/n. Bairro Sanatório, Aracaju, Sergipe, SE, Brazil.,The GREAT Group (GRupo de Estudos em ATividade física), Aracaju, Brazil
| | | | - Miburge Bolivar Gois Júnior
- Department of Physical Therapy and Post-Graduate Program in Health Sciences, Federal University of Sergipe - UFS, Rua Cláudio Batista, s/n. Bairro Sanatório, Aracaju, Sergipe, SE, Brazil.,The GREAT Group (GRupo de Estudos em ATividade física), Aracaju, Brazil
| | - Vitor Oliveira Carvalho
- Department of Physical Therapy and Post-Graduate Program in Health Sciences, Federal University of Sergipe - UFS, Rua Cláudio Batista, s/n. Bairro Sanatório, Aracaju, Sergipe, SE, Brazil.,The GREAT Group (GRupo de Estudos em ATividade física), Aracaju, Brazil
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Barnes KR, Kilding AE, Blagrove RC, Howatson G, Hayes PR, Boone J, Bourgois J, Fletcher JR, MacIntosh BR, González-Mohíno F, Yustres I, Santos-García DJ, González-Ravé JM, Hopker JG, Coleman DA, Kerhervé HA, Solomon C, Malatesta D, Lanzi S, Fernandez-Menendez A, Borrani F, Sandford GN, Maunder E, McNulty CR, Robergs RA, Pavei G, de Oliveira Barreto T, de Lima Conceição MR, Souza DS, Tenan MS, Macfarlane D, Hackney AC, Adamic EM, Shei RJ, Freemas JA, Barenie M, Barton J, Yeager Z, Nowak M, Paris HL, Mickleborough TD. Commentaries on Viewpoint: Use aerobic energy expenditure instead of oxygen uptake to quantify exercise intensity and predict endurance performance. J Appl Physiol (1985) 2019; 125:676-682. [PMID: 30138048 DOI: 10.1152/japplphysiol.00638.2018] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
Affiliation(s)
- Kyle R Barnes
- Department of Movement Science, Grand Valley State University, Allendale, Michigan
| | - Andrew E Kilding
- Sports Performance Research Institute New Zealand, Auckland University of Technology, Auckland, New Zealand
| | - Richard C Blagrove
- Faculty of Health, Education and Life Sciences, Birmingham City University, Birmingham, United Kingdom,Department of Sport, Exercise and Rehabilitation, Northumbria University, Newcastle-upon-Tyne, United Kingdom
| | - Glyn Howatson
- Department of Sport, Exercise and Rehabilitation, Northumbria University, Newcastle-upon-Tyne, United Kingdom,Water Research Group, Northwest University, Potchefstroom, South Africa
| | - Philip R Hayes
- Department of Sport, Exercise and Rehabilitation, Northumbria University, Newcastle-upon-Tyne, United Kingdom
| | - Jan Boone
- Department of Movement and Sports Science, Ghent University, Ghent, Belgium
| | - Jan Bourgois
- Department of Movement and Sports Science, Ghent University, Ghent, Belgium
| | - Jared R Fletcher
- Human Performance Laboratory, Faculty of Kinesiology. University of Calgary. Calgary, AB, Canada,W21C Research and Innovation Centre, O’Brien Institute of Public Health, Cumming School of Medicine. University of Calgary. Calgary, AB, Canada
| | - Brian R MacIntosh
- Human Performance Laboratory, Faculty of Kinesiology. University of Calgary. Calgary, AB, Canada
| | | | | | | | | | - James G Hopker
- School of Sport and Exercise Sciences, University of Kent, Chatham Maritime, Kent, England
| | - Damian A Coleman
- School of Human and Life Sciences, Canterbury Christ Church University, Canterbury, Kent, England
| | | | - Colin Solomon
- School of Health and Sport Sciences, University of the Sunshine Coast, Australia
| | - Davide Malatesta
- Institute of Sport Sciences (ISSUL), Faculty of Biology and Medicine, University of Lausanne, Lausanne, Switzerland
| | - Stefano Lanzi
- Division of Angiology, Heart and Vessel Department, Lausanne University Hospital, Lausanne, Switzerland,Service of Endocrinology, Diabetes and Metabolism, Lausanne University Hospital, Lausanne, Switzerland
| | - Aitor Fernandez-Menendez
- Institute of Sport Sciences (ISSUL), Faculty of Biology and Medicine, University of Lausanne, Lausanne, Switzerland
| | - Fabio Borrani
- Institute of Sport Sciences (ISSUL), Faculty of Biology and Medicine, University of Lausanne, Lausanne, Switzerland
| | - Gareth N Sandford
- Sports Performance Research Institute New Zealand, Auckland University of Technology, Auckland, New Zealand
| | - Ed Maunder
- Sports Performance Research Institute New Zealand, Auckland University of Technology, Auckland, New Zealand
| | | | | | - Gaspare Pavei
- Department of Pathophysiology and Transplantation, University of Milan, Milan, Italy
| | - Tatiane de Oliveira Barreto
- Excitable Membranes Laboratory, Department of Biochemistry and Immunology, Federal University of Minas Gerais, Belo Horizonte, Brazil
| | | | - Diego Santos Souza
- Laboratory of Heart Biophysics, Department of Physiology, Federal University of Sergipe, São Cristóvão, Brazil
| | | | | | | | - Emily M Adamic
- Human Performance Laboratory, Department of Kinesiology, Indiana University, Bloomington, Indiana
| | - Ren-Jay Shei
- Division of Pulmonary, Allergy, and Critical Care Medicine, Department of Medicine, University of Alabama at Birmingham, Birmingham, Alabama,Gregory Fleming James Cystic Fibrosis Research Center, Department of Medicine, University of Alabama at Birmingham, Birmingham, Alabama
| | - Jessica A Freemas
- Human Performance Laboratory, Department of Kinesiology, Indiana University, Bloomington, Indiana
| | - Matthew Barenie
- Human Performance Laboratory, Department of Kinesiology, Indiana University, Bloomington, Indiana
| | - Jacob Barton
- Human Performance Laboratory, Department of Kinesiology, Indiana University, Bloomington, Indiana
| | - Zane Yeager
- Human Performance Laboratory, Department of Kinesiology, Indiana University, Bloomington, Indiana
| | - Madeleine Nowak
- Human Performance Laboratory, Department of Kinesiology, Indiana University, Bloomington, Indiana
| | - Hunter L Paris
- Human Performance Laboratory, Department of Kinesiology, Indiana University, Bloomington, Indiana
| | - Timothy D Mickleborough
- Human Performance Laboratory, Department of Kinesiology, Indiana University, Bloomington, Indiana
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26
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Macedo FN, Souza DS, Santos JEA, Vasconcelos CML, Silva‐Filha ES, Quintans‐Júnior LJS, Mesquita TRR, Santana‐Filho VJ. Effects of Dexamethasone Therapeutic Doses Treatment in Electrocardiographic Abnormalities and Cardiac Remodeling of Rats: Role of Oxidative Stress. FASEB J 2019. [DOI: 10.1096/fasebj.2019.33.1_supplement.574.4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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27
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Souza DS, Barreto TDO, Santana MNS, Menezes-Filho JER, Cruz JS, Vasconcelos CMLD. Resident Macrophages Orchestrating Heart Rate. Arq Bras Cardiol 2019; 112:588-591. [PMID: 30843919 PMCID: PMC6555584 DOI: 10.5935/abc.20190041] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2018] [Accepted: 11/14/2018] [Indexed: 12/24/2022] Open
Affiliation(s)
| | | | | | | | - Jader Santos Cruz
- Universidade Federal de Minas Gerais - Bioquímica e Imunologia, Belo Horizonte, MG - Brazil
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28
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Santana MNS, Souza DS, Miguel-Dos-Santos R, Rabelo TK, Vasconcelos CMLD, Navia-Pelaez JM, Jesus ICGD, Silva-Neto JAD, Lauton-Santos S, Capettini LDSA, Guatimosim S, Rogers RG, Santos MRVD, Santana-Filho VJ, Mesquita TRR. Resistance exercise mediates remote ischemic preconditioning by limiting cardiac eNOS uncoupling. J Mol Cell Cardiol 2018; 125:61-72. [PMID: 30339842 DOI: 10.1016/j.yjmcc.2018.10.016] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/11/2018] [Revised: 10/10/2018] [Accepted: 10/15/2018] [Indexed: 12/13/2022]
Abstract
BACKGROUND Currently viewed as a complementary non-pharmacological intervention for preventing cardiac disorders, long-term aerobic training produces cardioprotection through remote ischemic preconditioning (RIPC) mechanisms. However, RIPC triggered by acute exercise remains poorly understood. Although resistance exercise (RE) has been highly recommended by several public health guidelines, there is no evidence showing that RE mediates RIPC. Hence, we investigated whether RE induces cardiac RIPC through nitric oxide synthase (NOS)-dependent mechanism. METHODS AND RESULTS Acute RE at 40% of the maximal load augmented systemic nitrite levels, associated with increased cardiac eNOS phosphorylation, without affecting nNOS activity. Using an experimental model of myocardial infarction (MI) through ischemia-reperfusion (IR), RE fully prevented the loss of cardiac contractility and the extent of MI size compared to non-exercised (NE) rats. Moreover, RE mitigated aberrant ST-segment and reduced life-threatening arrhythmias induced by IR. Importantly, inhibition of NOS abolished the RE-mediated cardioprotection. After IR, NE rats showed increased cardiac eNOS activity, associated with reduced dimer/monomer ratio. Supporting the pivotal role of eNOS coupling during MI, non-exercised rats displayed a marked generation of reactive oxygen species (ROS) and oxidative-induced carbonylation of proteins, whereas RE prevented these responses. We validated our data demonstrating a restoration of physiological ROS levels in NE + IR cardiac sections treated with BH4, a cofactor oxidatively depleted during eNOS uncoupling, while cardiac ROS generation from exercised rats remained unchanged, suggesting no physiological needs of supplemental eNOS cofactors. CONCLUSION Together, our findings strongly indicate that RE mediates RIPC by limiting eNOS uncoupling and mitigates myocardial IR injury.
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Affiliation(s)
| | - Diego Santos Souza
- Department of Physiology, Federal University of Sergipe, São Cristóvão, Brazil
| | | | | | | | | | | | - Julio Alves da Silva-Neto
- Department of Physiology, Federal University of Sergipe, São Cristóvão, Brazil; Department of Pharmacology, University of São Paulo, São Paulo, Brazil
| | | | | | - Silvia Guatimosim
- Departments of Physiology and Biophysics, Federal University of Minas Gerais, Belo Horizonte, Brazil
| | - Russell G Rogers
- Cedars-Sinai Medical Center, Smidt Heart Institute, Los Angeles, United States
| | | | | | - Thássio Ricardo Ribeiro Mesquita
- Department of Physiology, Federal University of Sergipe, São Cristóvão, Brazil; Cedars-Sinai Medical Center, Smidt Heart Institute, Los Angeles, United States.
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29
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Oliveira dos Santos AC, Souza DS, Ribeiro Mesquita TR, Rodrigues de Menezes-Filho JE, Duarte Caldas AP, de Souza AA, Andrade da Silva GB, de Oliveira ED, dos Santos LR, de Vasconcelos CML. Averrhoa bilimbi L. leaf Aqueous Extract Modulates both Cardiac Contractility and Frequency in the Guinea-pig Atrium by the Activation of Muscarinic Receptors. LETT DRUG DES DISCOV 2018. [DOI: 10.2174/1570180815666180125150457] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Affiliation(s)
- Anne Caroline Oliveira dos Santos
- Laboratory of Heart Biophysics, Department of Physiology, Federal University of Sergipe, Marechal Rondon, s/n, Jardim Rosa Elze, 49100-000, São Cristovao, SE, Brazil
| | - Diego Santos Souza
- Laboratory of Heart Biophysics, Department of Physiology, Federal University of Sergipe, Marechal Rondon, s/n, Jardim Rosa Elze, 49100-000, São Cristovao, SE, Brazil
| | - Thassio Ricardo Ribeiro Mesquita
- Laboratory of Heart Biophysics, Department of Physiology, Federal University of Sergipe, Marechal Rondon, s/n, Jardim Rosa Elze, 49100-000, São Cristovao, SE, Brazil
| | - Jose Evaldo Rodrigues de Menezes-Filho
- Laboratory of Heart Biophysics, Department of Physiology, Federal University of Sergipe, Marechal Rondon, s/n, Jardim Rosa Elze, 49100-000, São Cristovao, SE, Brazil
| | - Ana Paula Duarte Caldas
- Laboratory of Heart Biophysics, Department of Physiology, Federal University of Sergipe, Marechal Rondon, s/n, Jardim Rosa Elze, 49100-000, São Cristovao, SE, Brazil
| | - Americo Azevedo de Souza
- Laboratory of Heart Biophysics, Department of Physiology, Federal University of Sergipe, Marechal Rondon, s/n, Jardim Rosa Elze, 49100-000, São Cristovao, SE, Brazil
| | - Gilmara Beatriz Andrade da Silva
- Laboratory of Heart Biophysics, Department of Physiology, Federal University of Sergipe, Marechal Rondon, s/n, Jardim Rosa Elze, 49100-000, São Cristovao, SE, Brazil
| | - Evaleide Diniz de Oliveira
- Laboratory of Heart Biophysics, Department of Physiology, Federal University of Sergipe, Marechal Rondon, s/n, Jardim Rosa Elze, 49100-000, São Cristovao, SE, Brazil
| | - Leonardo Rodrigues dos Santos
- Laboratory of Heart Biophysics, Department of Physiology, Federal University of Sergipe, Marechal Rondon, s/n, Jardim Rosa Elze, 49100-000, São Cristovao, SE, Brazil
| | - Carla Maria Lins de Vasconcelos
- Laboratory of Heart Biophysics, Department of Physiology, Federal University of Sergipe, Marechal Rondon, s/n, Jardim Rosa Elze, 49100-000, São Cristovao, SE, Brazil
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30
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Britto RMD, Silva-Neto JAD, Mesquita TRR, Vasconcelos CMLD, de Almeida GKM, Jesus ICGD, Santos PHD, Souza DS, Miguel-Dos-Santos R, de Sá LA, Dos Santos FSM, Pereira-Filho RN, Albuquerque-Júnior RLC, Quintans-Júnior LJ, Guatimosim S, Lauton-Santos S. Myrtenol protects against myocardial ischemia-reperfusion injury through antioxidant and anti-apoptotic dependent mechanisms. Food Chem Toxicol 2017; 111:557-566. [PMID: 29208507 DOI: 10.1016/j.fct.2017.12.003] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2017] [Revised: 11/16/2017] [Accepted: 12/01/2017] [Indexed: 02/06/2023]
Abstract
Myrtenol is a monoterpene with multiple pharmacological activities. However, although monoterpenes have been proposed to play beneficial roles in a variety of cardiac disorders, pharmacological actions of myrtenol in the heart are not yet reported. Hence, the aim of this study was to evaluate whether myrtenol promotes cardioprotection against myocardial ischemia-reperfusion (IR) injury, and the mechanisms involved in these effects. Male Wistar rats were orally treated for seven consecutive days with myrtenol (50 mg/kg) or N-acetyl cysteine (1.200 mg/kg, NAC). Afterward, hearts were subjected to myocardial IR injury. Here, we show that the severe impairment of contractile performance induced by IR was significantly prevented by myrtenol or NAC. Moreover, myrtenol abolished aberrant electrocardiographic waveform (ST-segment elevation), as well as reduced life-threatening arrhythmias and infarct size induced by IR injury. Importantly, myrtenol fully prevented the massive increase of cardiac reactive oxygen species generation and oxidative stress damage. Accordingly, myrtenol restored the impairment of endogenous antioxidant enzymes (superoxide dismutase, catalase, glutathione peroxidase and reductase) activities and balance of pro- and anti-apoptotic pathways (Bax and Bcl-2), associated with decreased apoptotic cells. Taken together, our data show that myrtenol promotes cardioprotection against IR injury through attenuation of oxidative stress and inhibition of pro-apoptotic pathway.
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Affiliation(s)
| | | | | | | | | | | | | | - Diego Santos Souza
- Department of Physiology, Federal University of Sergipe, São Cristóvão, Brazil
| | | | - Lucas Andrade de Sá
- Department of Physiology, Federal University of Sergipe, São Cristóvão, Brazil
| | | | | | | | | | - Silvia Guatimosim
- Departments of Physiology and Biophysics, Federal University of Minas Gerais, Belo Horizonte, Brazil
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31
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Santos MS, Oliveira ED, Santos-Miranda A, Cruz JS, Gondim ANS, Menezes-Filho JER, Souza DS, Pinho-da-Silva L, Jesus ICG, Roman-Campos D, Guatimosim S, Lara A, Conde-Garcia EA, Vasconcelos CML. Dissection of the Effects of Quercetin on Mouse Myocardium. Basic Clin Pharmacol Toxicol 2017; 120:550-559. [PMID: 27992670 DOI: 10.1111/bcpt.12743] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2016] [Accepted: 12/05/2016] [Indexed: 12/01/2022]
Abstract
Quercetin is a plant flavonoid with several biological activities. This study aimed to describe quercetin effects on contractile and electrophysiological properties of the cardiac muscle as well as on calcium handling. Quercetin elicited positive inotropism that was significantly reduced by propranolol indicating an involvement of the sympathetic nervous system. In cardiomyocytes, 30 μM quercetin increased ICa,L at 0 mV from -0.95 ± 0.01 A/F to -1.21 ± 0.08 A/F. The membrane potential at which 50% of the channels are activated (V0.5 ) shifted towards more negative potentials from -13.06 ± 1.52 mV to -19.26 ± 1.72 mV and did not alter the slope factor. Furthermore, quercetin increased [Ca2+ ]i transient by 28% when compared to control. Quercetin accelerated [Ca2+ ]i transient decay time, which could be attributed to SERCA activation. In resting cardiomyocytes, quercetin did not change amplitude or frequency of Ca2+ sparks. In isolated heart, quercetin increased heart rate and decreased PRi, QTc and duration of the QRS complex. Thus, we showed that quercetin activates β-adrenoceptors, leading to increased L-type Ca2+ current and cell-wide intracellular Ca2+ transient without visible changes in Ca2+ sparks.
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Affiliation(s)
- Michel Santana Santos
- Laboratory of Heart Biophysics, Department of Physiology, Federal University of Sergipe, São Cristóvão, SE, Brazil
| | - Evaleide Diniz Oliveira
- Laboratory of Heart Biophysics, Department of Physiology, Federal University of Sergipe, São Cristóvão, SE, Brazil.,Department of Physiotherapy, Federal University of Sergipe, São Cristóvão, SE, Brazil
| | - Artur Santos-Miranda
- Excitable Membranes Laboratory, Department of Biochemistry and Immunology, Federal University of Minas Gerais, Belo Horizonte, MG, Brazil
| | - Jader Santos Cruz
- Excitable Membranes Laboratory, Department of Biochemistry and Immunology, Federal University of Minas Gerais, Belo Horizonte, MG, Brazil
| | - Antônio Nei Santana Gondim
- Laboratory of Biophysics and Pharmacology of the Heart, Department of Education, Campus XII, University of the State of Bahia, Guanambi, BA, Brazil
| | | | - Diego Santos Souza
- Laboratory of Heart Biophysics, Department of Physiology, Federal University of Sergipe, São Cristóvão, SE, Brazil
| | - Leidiane Pinho-da-Silva
- Excitable Membranes Laboratory, Department of Biochemistry and Immunology, Federal University of Minas Gerais, Belo Horizonte, MG, Brazil
| | - Itamar Couto Guedes Jesus
- Cardiomyocyte Intracellular Signaling Laboratory, Department of Physiology and Biophysics, Institute of Biological Sciences, Federal University of Minas Gerais, Belo Horizonte, MG, Brazil
| | - Danilo Roman-Campos
- Department of Biophysics, Federal University of São Paulo, São Paulo, Brazil
| | - Silvia Guatimosim
- Cardiomyocyte Intracellular Signaling Laboratory, Department of Physiology and Biophysics, Institute of Biological Sciences, Federal University of Minas Gerais, Belo Horizonte, MG, Brazil
| | - Aline Lara
- Cardiomyocyte Intracellular Signaling Laboratory, Department of Physiology and Biophysics, Institute of Biological Sciences, Federal University of Minas Gerais, Belo Horizonte, MG, Brazil
| | - Eduardo Antônio Conde-Garcia
- Laboratory of Heart Biophysics, Department of Physiology, Federal University of Sergipe, São Cristóvão, SE, Brazil
| | - Carla Maria Lins Vasconcelos
- Laboratory of Heart Biophysics, Department of Physiology, Federal University of Sergipe, São Cristóvão, SE, Brazil
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32
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Mezzacappa MA, Facchini FP, Pinto AC, Cassone AEL, Souza DS, Bezerra MAC, Albuquerque DM, Saad STO, Costa FF. Clinical and genetic risk factors for moderate hyperbilirubinemia in Brazilian newborn infants. J Perinatol 2010; 30:819-26. [PMID: 20376058 DOI: 10.1038/jp.2010.48] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
OBJECTIVE To identify clinical and genetic risk factors for moderate hyperbilirubinemia during the first week of life. STUDY DESIGN Using univariate and multivariate multiple regression analyses, the RR for clinical factors, the African variant of glucose-6-phosphate dehydrogenase (G6PD) deficiency (G202A/A376G), and (TA)(n) UGT1A1 polymorphisms were established in a cohort of 608 Brazilian newborn infants. Hyperbilirubinemia was monitored until 134.5 ± 49.8 h of life (IQR, 111.0 to 156.7). The dependent variable was total bilirubinemia (TB) ≥12.9 mg per 100 ml estimated by transcutaneous or plasma bilirubin measurements. RESULT The African variant of G6PD deficiency and (TA)(7)/(TA)(7) and (TA)(7)/(TA)(8) polymorphisms present in 6.1 and 12.0% of newborns, respectively, were not risk factors for moderate hyperbilirubinemia. Coexpression of G6DP deficiency and UGT1A1 polymorphisms occurred in 0.49% of the subjects. Independent clinical predictors for TB≥ 12.9 mg per 100 ml were gestational age <38 weeks and reference curve percentiles >P40th. CONCLUSION In this study, G6PD deficiency and UGT1A1 gene promoter polymorphisms were not risk factors for moderate hyperbilirubinemia. Genetic factors may vary considerably in importance among different populations.
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Affiliation(s)
- M A Mezzacappa
- Division of Neonatology, Department of Pediatrics, School of Medical Sciences, Universidade Estadual de Campinas, Campinas, São Paulo, Brazil
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33
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Souza DS, Spencer DM, Salles TSI, Salomão MA, Payen E, Beuzard Y, Carvalho HF, Costa FF, Saad STO. Death switch for gene therapy: application to erythropoietin transgene expression. Braz J Med Biol Res 2010; 43:634-44. [PMID: 20499015 DOI: 10.1590/s0100-879x2010007500046] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2009] [Accepted: 04/30/2010] [Indexed: 11/22/2022] Open
Abstract
The effectiveness of the caspase-9-based artificial "death switch" as a safety measure for gene therapy based on the erythropoietin (Epo) hormone was tested in vitro and in vivo using the chemical inducer of dimerization, AP20187. Plasmids encoding the dimeric murine Epo, the tetracycline-controlled transactivator and inducible caspase 9 (ptet-mEpoD, ptet-tTAk and pSH1/Sn-E-Fv'-Fvls-casp9-E, respectively) were used in this study. AP20187 induced apoptosis of iCasp9-modified C2C12 myoblasts. In vivo, two groups of male C57BI/6 mice, 8-12 weeks old, were injected intramuscularly with 5 microg/50 g ptet-mEpoD and 0.5 microg/50 g ptet-tTAk. There were 20 animals in group 1 and 36 animals in group 2. Animals from group 2 were also injected with the 6 microg/50 g iCasp9 plasmid. Seventy percent of the animals showed an increase in hematocrit of more than 65% for more than 15 weeks. AP20187 administration significantly reduced hematocrit and plasma Epo levels in 30% of the animals belonging to group 2. TUNEL-positive cells were detected in the muscle of at least 50% of the animals treated with AP20187. Doxycycline administration was efficient in controlling Epo secretion in both groups. We conclude that inducible caspase 9 did not interfere with gene transfer, gene expression or tetracycline control and may be used as a safety mechanism for gene therapy. However, more studies are necessary to improve the efficacy of this technique, for example, the use of lentivirus vector.
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Affiliation(s)
- D S Souza
- Centro de Hematologia e Hemoterapia, Departamento de Clínica Médica, Universidade de Campinas, Campinas, SP, Brasil
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Tsui JC, Souza DS, Filbey D, Bomfim V, Dashwood MR. Preserved endothelial integrity and nitric oxide synthase in saphenous vein grafts harvested by a 'no-touch' technique. Br J Surg 2001; 88:1209-15. [PMID: 11531869 DOI: 10.1046/j.0007-1323.2001.01855.x] [Citation(s) in RCA: 68] [Impact Index Per Article: 3.0] [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: 11/20/2022]
Abstract
BACKGROUND The saphenous vein is the most commonly used conduit for coronary artery bypass surgery, but 1-year occlusion rates as high as 30 per cent have been reported. In conventional surgery, considerable damage to the vein occurs during harvesting. The aim of this study was to compare endothelial integrity and nitric oxide synthase (NOS) in saphenous veins harvested by a novel 'no-touch' technique and veins harvested conventionally. METHODS Immunohistochemistry was used to study endothelial integrity, and a combination of histochemistry and autoradiography was employed to identify NOS in human saphenous veins harvested by conventional and no-touch techniques. RESULTS The endothelial lining of conventional grafts was reduced compared with that of no-touch grafts (52 versus 73 per cent; P = 0.04). This was associated with a concomitant reduction of NOS availability; NOS was also present in the adventitial vasa vasorum of no-touch vessels. CONCLUSION Some of the sites with potential for nitric oxide release in vivo are removed during conventional saphenous vein harvesting. These sites were preserved after no-touch harvesting, suggesting the potential to improve coronary artery bypass graft patency.
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Affiliation(s)
- J C Tsui
- Department of Surgery, Royal Free and University College Medical School, London, UK
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35
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Souza DS, Bomfim V, Skoglund H, Dashwood MR, Borowiec JW, Bodin L, Filbey D. High early patency of saphenous vein graft for coronary artery bypass harvested with surrounding tissue. Ann Thorac Surg 2001; 71:797-800. [PMID: 11269454 DOI: 10.1016/s0003-4975(00)02508-x] [Citation(s) in RCA: 59] [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] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
BACKGROUND Surgical trauma to the saphenous vein, used as a conduit for coronary artery bypass grafting, affects their occlusion rate. This study evaluates the early patency of saphenous vein grafts harvested with a pedicle of surrounding tissue that protects the vein from spasm and trauma. METHODS Fifty-two patients underwent coronary artery bypass grafting with saphenous veins harvested with surrounding tissue. Forty-five patients, who received a total of 124 vein grafts and 42 left internal mammary arteries, underwent angiographic follow-up at a mean of 18 months (9 to 24 months). RESULTS Patency for saphenous vein grafts was 95.4% and for left internal mammary arteries, it was 93.3%. Twenty-nine of 30 (96.7%) vein grafts anastomosed to arteries 2.0 mm or more, 65 of 67 (97%) grafts to 1.5 mm, and 10 of 13 (77%) anastomosed to 1-mm arteries were patent. Nineteen of 22 (86.4%) vein grafts with flow rates 20 mL/min or less, 32 of 34 (94.1%) with flow between 20 and 40 mL/min, and 50 of 51 (98%) with flow more than 40 mL/min were patent. Other registered surgical and clinical factors did not contribute to vessel occlusion. CONCLUSIONS Early patency rate of saphenous veins harvested with surrounding tissue is very high, even in saphenous vein grafts demonstrating low blood flow. Preservation of graft endothelium using our harvesting technique may be the explanation of this success.
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Affiliation(s)
- D S Souza
- Department of Cardiothoracic Surgery, Orebro Medical Centre Hospital, Sweden.
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Souza DS, Christofferson RH, Bomfim V, Filbey D. "No-touch" technique using saphenous vein harvested with its surrounding tissue for coronary artery bypass grafting maintains an intact endothelium. SCAND CARDIOVASC J 2000; 33:323-9. [PMID: 10622542 DOI: 10.1080/14017439950141362] [Citation(s) in RCA: 50] [Impact Index Per Article: 2.1] [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: 10/17/2022]
Abstract
Spasm and consequent dilation of the saphenous vein (SV) for coronary artery bypass grafting (CABG) can be avoided if the vein is harvested with its surrounding tissue. Morphologic techniques, including scanning and transmission electron microscopy, were used to compare endothelial cell integrity using three SV harvesting procedures: conventional (adventitial stripping of the vein, manual distention and storing in saline); intermediate (after adventitial stripping, the vein was left in situ, covered with a papaverine-soaked compress, and stored in heparinized blood); and "no-touch" (SV dissected with its surrounding tissue was left in situ, covered with a saline-soaked compress and stored in heparinized blood). Preservation of endothelial cell integrity was greater with the "no-touch" procedure than with the other methods. Since endothelial cell integrity of SV grafts may affect the patency rate, we conclude that the "no-touch" preparation should improve the results of CABG.
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Affiliation(s)
- D S Souza
- Department of Cardiovascular Surgery, Orebro Medical Center Hospital, Sweden
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Abstract
Dysembryoplastic neuroepithelial tumor (DNT) is a relatively new neuroepithelial neoplasm that was first described by Daumas-Duport et al. in 1988. It was incorporated in the revised World Health Organization classification of brain tumors in 1993. The authors present the first case of DNT reported in the Latin-American literature. A 16-year-old woman had been found at age of five years to have complex partial seizures accompanied by secondary generalization. She was treated with various anti-epileptic drugs but always with incomplete control of seizures activity. Neurological examination was normal. Magnetic resonance imaging demonstrated a lesion in the left temporal lobe. She underwent a craniotomy with complete resection of the tumor. Histological study showed atypical neuroglial proliferation characteristic of DNT. Monoclonal antibody immunostaining for glial fibrillary acidic protein and S-100 protein confirmed the glial component, and neuronal specific enolase and synaptophysin emphasized the neuronal component.
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Affiliation(s)
- L F Torres
- Serviço de Anatomia Patológica, Hospital Nossa Senhora das Graças, Curitiba, Brasil
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