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Garcia IJP, Kinoshita PF, Scavone C, Mignaco JA, de Oliveira Barbosa LA, de Lima Santos H. Ouabain Modulates the Lipid Composition of Hippocampal Plasma Membranes from Rats with LPS-induced Neuroinflammation. J Membr Biol 2015; 248:1191-8. [DOI: 10.1007/s00232-015-9840-7] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2015] [Accepted: 09/04/2015] [Indexed: 12/21/2022]
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Serafim KGG, Navarro SA, Zarpelon AC, Pinho-Ribeiro FA, Fattori V, Cunha TM, Alves-Filho JC, Cunha FQ, Casagrande R, Verri WA. Bosentan, a mixed endothelin receptor antagonist, inhibits superoxide anion-induced pain and inflammation in mice. Naunyn Schmiedebergs Arch Pharmacol 2015; 388:1211-21. [PMID: 26246053 DOI: 10.1007/s00210-015-1160-z] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2015] [Accepted: 07/27/2015] [Indexed: 01/24/2023]
Abstract
Bosentan is a mixed endothelin receptor antagonist widely used to treat patients with pulmonary arterial hypertension, and the emerging literature suggests bosentan as a potent anti-inflammatory drug. Superoxide anion is produced in large amounts during inflammation, stimulates cytokine production, and thus contributes to inflammation and pain. However, it remains to be determined whether endothelin contributes to the inflammatory response triggered by the superoxide anion. The present study investigated the effects of bosentan in a mouse model of inflammation and pain induced by potassium superoxide, a superoxide anion donor. Male Swiss mice were treated with bosentan (10-100 mg/kg) by oral gavage, 1 h before potassium superoxide injection, and the inflammatory response was evaluated locally and at spinal cord (L4-L6) levels. Bosentan (100 mg/kg) inhibited superoxide anion-induced mechanical and thermal hyperalgesia, overt pain-like behavior (abdominal writhings, paw flinching, and licking), paw edema, myeloperoxidase activity (neutrophil marker) in the paw skin, and leukocyte recruitment in the peritoneal cavity. Bosentan also inhibited superoxide anion-induced interleukin-1 beta (IL-1β) and tumor necrosis factor alpha (TNF-α) production, while it enhanced IL-10 production in the paw skin and spinal cord. Bosentan inhibited the reduction of antioxidant capacity (reduced glutathione, ferric reducing antioxidant power, and ABTS radical scavenging ability) induced by the superoxide anion. Finally, we demonstrated that intraplantar injection of potassium superoxide induces the mRNA expression of prepro-endothelin-1 in the paw skin and spinal cord. In conclusion, our results demonstrated that superoxide anion-induced inflammation, pain, cytokine production, and oxidative stress depend on endothelin; therefore, these responses are amenable to bosentan treatment.
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Affiliation(s)
- Karla G G Serafim
- Departamento de Ciências Patológicas, Centro de Ciências Biológicas, Universidade Estadual de Londrina, Rod. Celso Garcia Cid PR445 KM380, Londrina, Paraná, 86057-970, Brazil
| | - Suelen A Navarro
- Departamento de Ciências Patológicas, Centro de Ciências Biológicas, Universidade Estadual de Londrina, Rod. Celso Garcia Cid PR445 KM380, Londrina, Paraná, 86057-970, Brazil
| | - Ana C Zarpelon
- Departamento de Ciências Patológicas, Centro de Ciências Biológicas, Universidade Estadual de Londrina, Rod. Celso Garcia Cid PR445 KM380, Londrina, Paraná, 86057-970, Brazil
| | - Felipe A Pinho-Ribeiro
- Departamento de Ciências Patológicas, Centro de Ciências Biológicas, Universidade Estadual de Londrina, Rod. Celso Garcia Cid PR445 KM380, Londrina, Paraná, 86057-970, Brazil
| | - Victor Fattori
- Departamento de Ciências Patológicas, Centro de Ciências Biológicas, Universidade Estadual de Londrina, Rod. Celso Garcia Cid PR445 KM380, Londrina, Paraná, 86057-970, Brazil
| | - Thiago M Cunha
- Department of Pharmacology, Ribeirão Preto Medical School, University of São Paulo, Av. Bandeirantes, 3900, Ribeirão Preto, São Paulo, 14049-900, Brazil
| | - Jose C Alves-Filho
- Department of Pharmacology, Ribeirão Preto Medical School, University of São Paulo, Av. Bandeirantes, 3900, Ribeirão Preto, São Paulo, 14049-900, Brazil
| | - Fernando Q Cunha
- Department of Pharmacology, Ribeirão Preto Medical School, University of São Paulo, Av. Bandeirantes, 3900, Ribeirão Preto, São Paulo, 14049-900, Brazil
| | - Rubia Casagrande
- Departamento de Ciências Farmacêuticas, Centro de Ciências da Saúde, Hospital Universitário, Universidade Estadual de Londrina, Av. Robert Koch, 60, Londrina, Paraná, 86038-350, Brazil
| | - Waldiceu A Verri
- Departamento de Ciências Patológicas, Centro de Ciências Biológicas, Universidade Estadual de Londrina, Rod. Celso Garcia Cid PR445 KM380, Londrina, Paraná, 86057-970, Brazil.
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Kowalczyk A, Kleniewska P, Kolodziejczyk M, Skibska B, Goraca A. The role of endothelin-1 and endothelin receptor antagonists in inflammatory response and sepsis. Arch Immunol Ther Exp (Warsz) 2014; 63:41-52. [PMID: 25288367 PMCID: PMC4289534 DOI: 10.1007/s00005-014-0310-1] [Citation(s) in RCA: 157] [Impact Index Per Article: 15.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2013] [Accepted: 07/18/2014] [Indexed: 12/12/2022]
Abstract
Endothelin-1 (ET-1) is a potent endogenous vasoconstrictor, mainly secreted by endothelial cells. It acts through two types of receptors: ETA and ETB. Apart from a vasoconstrictive action, ET-1 causes fibrosis of the vascular cells and stimulates production of reactive oxygen species. It is claimed that ET-1 induces proinflammatory mechanisms, increasing superoxide anion production and cytokine secretion. A recent study has shown that ET-1 is involved in the activation of transcription factors such as NF-κB and expression of proinflammatory cytokines including TNF-α, IL-1, and IL-6. It has been also indicated that during endotoxaemia, the plasma level of ET-1 is increased in various animal species. Some authors indicate a clear correlation between endothelin plasma level and morbidity/mortality rate in septic patients. These pathological effects of ET-1 may be abrogated at least partly by endothelin receptor blockade. ET-1 receptor antagonists may be useful for prevention of various vascular diseases. This review summarises the current knowledge regarding endothelin receptor antagonists and the role of ET-1 in sepsis and inflammation.
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Affiliation(s)
- Agata Kowalczyk
- Chair of Experimental and Clinical Physiology, Department of Cardiovascular Physiology, Medical University of Lodz, Mazowiecka 6/8, 92-215, Lodz, Poland,
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Ramiro-Diaz JM, Giermakowska W, Weaver JM, Jernigan NL, Gonzalez Bosc LV. Mechanisms of NFATc3 activation by increased superoxide and reduced hydrogen peroxide in pulmonary arterial smooth muscle. Am J Physiol Cell Physiol 2014; 307:C928-38. [PMID: 25163518 DOI: 10.1152/ajpcell.00244.2014] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
We recently demonstrated increased superoxide (O2(·-)) and decreased H2O2 levels in pulmonary arteries of chronic hypoxia-exposed wild-type and normoxic superoxide dismutase 1 (SOD1) knockout mice. We also showed that this reciprocal change in O2(·-) and H2O2 is associated with elevated activity of nuclear factor of activated T cells isoform c3 (NFATc3) in pulmonary arterial smooth muscle cells (PASMC). This suggests that an imbalance in reactive oxygen species levels is required for NFATc3 activation. However, how such imbalance activates NFATc3 is unknown. This study evaluated the importance of O2(·-) and H2O2 in the regulation of NFATc3 activity. We tested the hypothesis that an increase in O2(·-) enhances actin cytoskeleton dynamics and a decrease in H2O2 enhances intracellular Ca(2+) concentration, contributing to NFATc3 nuclear import and activation in PASMC. We demonstrate that, in PASMC, endothelin-1 increases O2(·-) while decreasing H2O2 production through the decrease in SOD1 activity without affecting SOD protein levels. We further demonstrate that O2(·-) promotes, while H2O2 inhibits, NFATc3 activation in PASMC. Additionally, increased O2(·-)-to-H2O2 ratio activates NFATc3, even in the absence of a Gq protein-coupled receptor agonist. Furthermore, O2(·-)-dependent actin polymerization and low intracellular H2O2 concentration-dependent increases in intracellular Ca(2+) concentration contribute to NFATc3 activation. Together, these studies define important and novel regulatory mechanisms of NFATc3 activation in PASMC by reactive oxygen species.
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Affiliation(s)
- Juan Manuel Ramiro-Diaz
- Vascular Physiology Group, Department of Cell Biology and Physiology, School of Medicine, University of New Mexico Health Sciences Center, Albuquerque, New Mexico
| | - Wieslawa Giermakowska
- Vascular Physiology Group, Department of Cell Biology and Physiology, School of Medicine, University of New Mexico Health Sciences Center, Albuquerque, New Mexico
| | - John M Weaver
- Center of Biomedical Research Excellence, University of New Mexico Health Sciences Center, Albuquerque, New Mexico; and Department of Pharmaceutical Sciences, College of Pharmacy, University of New Mexico Health Sciences Center, Albuquerque, New Mexico
| | - Nikki L Jernigan
- Vascular Physiology Group, Department of Cell Biology and Physiology, School of Medicine, University of New Mexico Health Sciences Center, Albuquerque, New Mexico
| | - Laura V Gonzalez Bosc
- Vascular Physiology Group, Department of Cell Biology and Physiology, School of Medicine, University of New Mexico Health Sciences Center, Albuquerque, New Mexico;
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Piechota-Polańczyk A, Gorąca A. Influence of specific endothelin-1 receptor blockers on hemodynamic parameters and antioxidant status of plasma in LPS-induced endotoxemia. Pharmacol Rep 2013; 64:1434-41. [PMID: 23406754 DOI: 10.1016/s1734-1140(12)70941-6] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2012] [Revised: 08/13/2012] [Indexed: 02/07/2023]
Abstract
BACKGROUND The potent vasoconstrictor endothelin-1 has been implicated in the pathogenesis of plasma oxidative stress seen in sepsis. The selective endothelin receptor blockers BQ123 and BQ788 were used to investigate the importance of selective endothelin receptor blockage in modulating oxidative stress during endotoxemia. METHODS The study was performed on male Wistar rats (n = 6 per group) divided into groups: (1) saline, (2) lipopolysaccharide (LPS) (15 mg/kg)-saline, (3) BQ123 (0.5 mg/kg)-LPS, (4) BQ123 (1 mg/kg)-LPS, (5) BQ788 (3 mg/kg)-LPS. The endothelin receptor type A(ETA-R) or type B (ETB-R) antagonist was injected intravenously 30 min before LPS administration. Blood pressure was monitored and blood was taken before, 90 min and 300 min after saline or LPS administration. RESULTS Injection of LPS alone resulted in a decrease in mean arterial pressure (MAP) (p < 0.05), a decrease in ferric reducing ability of plasma (FRAP) value (p < 0.01) and a marked increase in plasma tumor necrosis factor α (TNF-α) and thiobarbituric acid reactive substances (TBARS) (p < 0.001, p < 0.001, respectively). Administration of BQ123 before LPS administration deteriorated MAP in a dose dependent way. Moreover, BQ123 (1 mg/kg) decreased plasma level of TBARS and TNF-α (p < 0.01 and p < 0.05, respectively) and increased FRAP value (p < 0.001). On the contrary, BQ788 prevented LPS-induced decrease in MAP(p < 0.001) and led to a significant reduction in plasma TBARS concentration (p < 0.01). CONCLUSIONS Our study showed that blockage of ETB-R during endotoxemia improved blood hemodynamics and decreased plasma lipid peroxidation. Blockage of ETA-R improved plasma antioxidant status and decreased lipid peroxidation and TNF-α production, but it deteriorated hemodynamic conditions.
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Affiliation(s)
- Aleksandra Piechota-Polańczyk
- Chair of Experimental and Clinical Physiology, Department of Cardiovascular Physiology, Medical University of Lodz, Mazowiecka 6/8, PL 92-215 Łódź, Poland.
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