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Endothelinergic Contractile Hyperreactivity in Rat Contralateral Carotid to Balloon Injury: Integrated Role for ET B Receptors and Superoxide Anion. BIOMED RESEARCH INTERNATIONAL 2017; 2017:3137580. [PMID: 29062837 PMCID: PMC5618786 DOI: 10.1155/2017/3137580] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/03/2017] [Revised: 06/08/2017] [Accepted: 07/02/2017] [Indexed: 11/18/2022]
Abstract
Temporal consequences of neurocompensation to balloon injury on endothelinergic functionality in rat contralateral carotid were evaluated. Rats underwent balloon injury in left carotid and were treated with CP-96345 (NK1 antagonist). Concentration-response curves for endothelin-1 were obtained in contralateral (right) carotid at 2, 8, 16, 30, or 45 days after surgery in the absence or presence of BQ-123 (ETA antagonist), BQ-788 (ETB antagonist), or Tempol (superoxide-dismutase mimic). Endothelin-1-induced calcium mobilization was evaluated in functional assays carried out with BQ-123, BQ-788, or Tempol. Endothelin-1-induced NADPH oxidase-driven superoxide generation was measured by lucigenin chemiluminescence assays performed with BQ-123 or BQ-788. Endothelin-1-induced contraction was increased in contralateral carotid from the sixteenth day after surgery. This response was restored in CP-96345-treated rats. Endothelium removal or BQ-123 did not change endothelin-1-induced contraction in contralateral carotid. This response was restored by BQ-788 or Tempol. Contralateral carotid exhibited an increased endothelin-1-induced calcium mobilization, which was restored by BQ-788 or Tempol. Contralateral carotid exhibited an increased endothelin-1-induced lucigenin chemiluminescence, which was restored by BQ-788. We conclude that the NK1-mediated neurocompensatory response to balloon injury elicits a contractile hyperreactivity to endothelin-1 in rat contralateral carotid by enhancing the muscular ETB-mediated NADPH oxidase-driven generation of superoxide, which activates calcium channels.
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Moreira JD, Pernomian L, Gomes MS, Moreira RP, do Prado AF, da Silva CHTP, de Oliveira AM. Enhanced nitric oxide generation from nitric oxide synthases as the cause of increased peroxynitrite formation during acute restraint stress: Effects on carotid responsiveness to angiotensinergic stimuli in type-1 diabetic rats. Eur J Pharmacol 2016; 783:11-22. [PMID: 27118175 DOI: 10.1016/j.ejphar.2016.04.050] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2016] [Revised: 04/21/2016] [Accepted: 04/22/2016] [Indexed: 12/20/2022]
Abstract
Diabetes mellitus is associated with reactive oxygen and nitrogen species accumulation. Behavioral stress increases nitric oxide production, which may trigger a massive impact on vascular cells and accelerate cardiovascular complications under oxidative stress conditions such as Diabetes. For this study, type-1 Diabetes mellitus was induced in Wistar rats by intraperitoneal injection of streptozotocin. After 28 days, cumulative concentration-response curves for angiotensin II were obtained in endothelium-intact carotid rings from diabetic rats that underwent to acute restraint stress for 3h. The contractile response evoked by angiotensin II was increased in carotid arteries from diabetic rats. Acute restraint stress did not alter angiotensin II-induced contraction in carotid arteries from normoglycaemic rats. However acute stress combined with Diabetes increased angiotensin II-induced contraction in carotid rings. Western blot experiments and the inhibition of nitric oxide synthases in functional assays showed that neuronal, endothelial and inducible nitric oxide synthase isoforms contribute to the increased formation of peroxynitrite and contractile hyperreactivity to angiotensin II in carotid rings from stressed diabetic rats. In summary, these findings suggest that the increased superoxide anion generation in carotid arteries from diabetic rats associated to the increased local nitric oxide synthases expression and activity induced by acute restrain stress were responsible for exacerbating the local formation of peroxynitrite and the contraction induced by angiotensin II.
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Affiliation(s)
- Josimar D Moreira
- Department of Clinical and Toxicological Analysis, Faculty of Pharmacy, Federal University from Minas Gerais, Belo Horizonte, MG, Brazil.
| | - Larissa Pernomian
- Department of Pharmaceutical Sciences, Faculty of Pharmaceutical Sciences from Ribeirão Preto, University of São Paulo, Ribeirão Preto, SP, Brazil
| | - Mayara S Gomes
- Department of Physics and Chemistry, Faculty of Pharmaceutical Sciences from Ribeirão Preto, University of São Paulo, Ribeirão Preto, SP, Brazil
| | - Rafael P Moreira
- Department of Internalization - Binational Campus, Federal University from Amapá, Oiapoque, AP, Brazil
| | - Alejandro F do Prado
- Institutional Capacity Building Program, Coordination of Earth Science and Ecology, Museum Paraense Emílio Goeldi (MPEG), Belém, PA, Brazil
| | - Carlos H T P da Silva
- Department of Pharmaceutical Sciences, Faculty of Pharmaceutical Sciences from Ribeirão Preto, University of São Paulo, Ribeirão Preto, SP, Brazil
| | - Ana M de Oliveira
- Department of Physics and Chemistry, Faculty of Pharmaceutical Sciences from Ribeirão Preto, University of São Paulo, Ribeirão Preto, SP, Brazil
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Pernomian L, do Prado AF, Gomes MS, Pernomian L, da Silva CH, Gerlach RF, de Oliveira AM. MAS receptors mediate vasoprotective and atheroprotective effects of candesartan upon the recovery of vascular angiotensin-converting enzyme 2–angiotensin-(1-7)–MAS axis functionality. Eur J Pharmacol 2015; 764:173-188. [DOI: 10.1016/j.ejphar.2015.07.007] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2015] [Revised: 06/30/2015] [Accepted: 07/01/2015] [Indexed: 11/15/2022]
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Moreira JD, Pernomian L, Gomes MS, Pernomian L, Moreira RP, do Prado AF, da Silva CHTP, de Oliveira AM. Acute restraint stress increases carotid reactivity in type-I diabetic rats by enhancing Nox4/NADPH oxidase functionality. Eur J Pharmacol 2015; 765:503-16. [PMID: 26387612 DOI: 10.1016/j.ejphar.2015.09.020] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2015] [Revised: 08/16/2015] [Accepted: 09/14/2015] [Indexed: 12/23/2022]
Abstract
Hyperglycemia increases the generation of reactive oxygen species and affects systems that regulate the vascular tone including renin-angiotensin system. Stress could exacerbate intracellular oxidative stress during Diabetes upon the activation of angiotensin AT1/NADPH oxidase pathway, which contributes to the development of diabetic cardiovascular complications. For this study, type-I Diabetes was induced in Wistar rats by intraperitoneal injection of streptozotocin. 28 days after streptozotocin injection, the animals underwent to acute restraint stress for 3 h. Cumulative concentration-response curves for angiotensin II were obtained in carotid rings pre-treated or not with Nox or cyclooxygenase inhibitors. Nox1 or Nox4 expression and activity were assessed by Western blotting and lucigenin chemiluminescence, respectively. The role of Nox1 and Nox4 on reactive oxygen species generation was evaluated by flow cytometry and Amplex Red assays. Cyclooxygenases expression was assessed by real-time polymerase chain reaction. The contractile response evoked by angiotensin II was increased in diabetic rat carotid. Acute restraint stress increased this response in this vessel by mechanisms mediated by Nox4, whose local expression and activity in generating hydrogen peroxide are increased. The contractile hyperreactivity to angiotensin II in stressed diabetic rat carotid is also mediated by metabolites derived from cyclooxygenase-2, whose local expression is increased. Taken together, our findings suggest that acute restraint stress exacerbates the contractile hyperreactivity to angiotensin II in diabetic rat carotid by enhancing Nox4-driven generation of hydrogen peroxide, which evokes contractile tone by cyclooxygenases-dependent mechanisms. Finally, these findings highlight the harmful role played by acute stress in modulating diabetic vascular complications.
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Affiliation(s)
- Josimar D Moreira
- Department of Clinical and Toxicological Analysis, Faculty of Pharmacy, Federal University from Minas Gerais (UFMG), Belo Horizonte, MG, Brazil.
| | - Larissa Pernomian
- Department of Pharmaceutical Sciences, Faculty of Pharmaceutical Sciences from Ribeirão Preto (FCFRP), University of São Paulo (USP), Ribeirão Preto, SP, Brazil
| | - Mayara S Gomes
- Department of Physics and Chemistry, FCFRP, USP, Ribeirão Preto, SP, Brazil
| | - Laena Pernomian
- Department of Pharmacology, Faculty of Medicine from Ribeirão Preto (FMRP), USP, Ribeirão Preto, SP, Brazil
| | - Rafael P Moreira
- Department of Physics and Chemistry, FCFRP, USP, Ribeirão Preto, SP, Brazil
| | - Alejandro F do Prado
- Department of Pharmacology, Faculty of Medicine from Ribeirão Preto (FMRP), USP, Ribeirão Preto, SP, Brazil
| | - Carlos H T P da Silva
- Department of Pharmaceutical Sciences, Faculty of Pharmaceutical Sciences from Ribeirão Preto (FCFRP), University of São Paulo (USP), Ribeirão Preto, SP, Brazil
| | - Ana M de Oliveira
- Department of Physics and Chemistry, FCFRP, USP, Ribeirão Preto, SP, Brazil
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Pernomian L, Gomes MS, Pernomian L, Moreira RP, Corrêa FM, de Oliveira AM. Vasoprotective effects of neurocompensatory response to balloon injury during diabetes involve the improvement of Mas signaling by TGFβ1 activation. Vascul Pharmacol 2015; 64:36-48. [DOI: 10.1016/j.vph.2015.01.001] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2014] [Revised: 01/05/2015] [Accepted: 01/06/2015] [Indexed: 11/27/2022]
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MAS-mediated antioxidant effects restore the functionality of angiotensin converting enzyme 2-angiotensin-(1-7)-MAS axis in diabetic rat carotid. BIOMED RESEARCH INTERNATIONAL 2014; 2014:640329. [PMID: 24877125 PMCID: PMC4022170 DOI: 10.1155/2014/640329] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/30/2013] [Accepted: 03/06/2014] [Indexed: 12/29/2022]
Abstract
We hypothesized that endothelial AT1-activated NAD(P)H oxidase-driven generation of reactive oxygen species during type I-diabetes impairs carotid ACE2-angiotensin-(1–7)-Mas axis functionality, which accounts for the impaired carotid flow in diabetic rats. We also hypothesized that angiotensin-(1–7) chronic treatment of diabetic rats restores carotid ACE2-angiotensin-(1–7)-Mas axis functionality and carotid flow. Relaxant curves for angiotensin II or angiotensin-(1–7) were obtained in carotid from streptozotocin-induced diabetic rats. Superoxide or hydrogen peroxide levels were measured by flow cytometry in carotid endothelial cells. Carotid flow was also determined. We found that endothelial AT1-activated NAD(P)H oxidase-driven generation of superoxide and hydrogen peroxide in diabetic rat carotid impairs ACE2-angiotensin-(1–7)-Mas axis functionality, which reduces carotid flow. In this mechanism, hydrogen peroxide derived from superoxide dismutation inhibits ACE2 activity in generating angiotensin-(1–7) seemingly by activating ICl,SWELL, while superoxide inhibits the nitrergic Mas-mediated vasorelaxation evoked by angiotensin-(1–7). Angiotensin-(1–7) treatment of diabetic rats restored carotid ACE2-angiotensin-(1–7)-Mas axis functionality by triggering a positive feedback played by endothelial Mas receptors, that blunts endothelial AT1-activated NAD(P)H oxidase-driven generation of reactive oxygen species. Mas-mediated antioxidant effects also restored diabetic rat carotid flow, pointing to the contribution of ACE2-angiotensin-(1–7)-Mas axis in maintaining carotid flow.
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Pereira AC, Olivon VC, Pernomian L, de Oliveira AM. Impairment of α1-adrenoceptor-mediated calcium influx in contralateral carotids following balloon injury: Beneficial effect of superoxide anions. Eur J Pharmacol 2014; 723:397-404. [DOI: 10.1016/j.ejphar.2013.10.066] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2013] [Revised: 10/20/2013] [Accepted: 10/27/2013] [Indexed: 12/29/2022]
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