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Moraes RA, Brito DS, Araujo FA, Jesus RLC, Silva LB, Sá DS, Silva da Silva CD, Pernomian L, Wenceslau CF, Priviero F, Webb RC, Silva DF. NONO2P, a novel nitric oxide donor, causes vasorelaxation through NO/sGC/PKG pathway, K + channels opening and SERCA activation. Eur J Pharmacol 2024; 979:176822. [PMID: 39047965 DOI: 10.1016/j.ejphar.2024.176822] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2024] [Revised: 07/01/2024] [Accepted: 07/17/2024] [Indexed: 07/27/2024]
Abstract
BACKGROUND & AIMS The treatment of cardiovascular diseases (CVD) could greatly benefit from using nitric oxide (NO) donors. This study aimed to investigate the mechanisms of action of NONO2P that contribute to the observed responses in the mesenteric artery. The hypothesis was that NONO2P would have similar pharmacological actions to sodium nitroprusside (SNP) and NO. METHODS Male Wistar rats were euthanized to isolate the superior mesenteric artery for isometric tension recordings. NO levels were measured using the DAF-FM/DA dye, and cyclic guanosine monophosphate (cGMP) levels were determined using a cGMP-ELISA Kit. RESULTS NONO2P presented a similar maximum efficacy to SNP. The free radical of NO (NO•) scavengers (PTIO; 100 μM and hydroxocobalamin; 30 μM) and nitroxyl anion (NO-) scavenger (L-cysteine; 3 mM) decreased relaxations promoted by NONO2P. The presence of the specific soluble guanylyl cyclase (sGC) inhibitor (ODQ; 10 μM) nearly abolished the vasorelaxation. The cGMP-dependent protein kinase (PKG) inhibition (KT5823; 1 μM) attenuated the NONO2P relaxant effect. The vasorelaxant response was significantly attenuated by blocking inward rectifying K+ channels (Kir), voltage-operated K+ channels (KV), and large conductance Ca2+-activated K+ channels (BKCa). NONO2P-induced relaxation was attenuated by cyclopiazonic acid (10 μM), indicating that sarcoplasmic reticulum Ca2+-ATPase (SERCA) activation is involved in this relaxation. Moreover, NONO2P increased NO levels in endothelial cells and cGMP production. CONCLUSIONS NONO2P induces vasorelaxation with the same magnitude as SNP, releasing NO• and NO-. Its vasorelaxant effect involves sGC, PKG, K+ channels opening, and SERCA activation, suggesting its potential as a therapeutic option for CVD.
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Affiliation(s)
- Raiana A Moraes
- Laboratory of Cardiovascular Physiology and Pharmacology, Bioregulation Department, Federal University of Bahia, UFBA, Salvador, Bahia, Brazil; Gonçalo Moniz Institute, FIOCRUZ, Salvador, BA, Brazil
| | - Daniele S Brito
- Laboratory of Cardiovascular Physiology and Pharmacology, Bioregulation Department, Federal University of Bahia, UFBA, Salvador, Bahia, Brazil; Gonçalo Moniz Institute, FIOCRUZ, Salvador, BA, Brazil
| | - Fênix A Araujo
- Laboratory of Cardiovascular Physiology and Pharmacology, Bioregulation Department, Federal University of Bahia, UFBA, Salvador, Bahia, Brazil; Gonçalo Moniz Institute, FIOCRUZ, Salvador, BA, Brazil
| | - Rafael L C Jesus
- Laboratory of Cardiovascular Physiology and Pharmacology, Bioregulation Department, Federal University of Bahia, UFBA, Salvador, Bahia, Brazil
| | - Liliane B Silva
- Laboratory of Cardiovascular Physiology and Pharmacology, Bioregulation Department, Federal University of Bahia, UFBA, Salvador, Bahia, Brazil
| | - Denise S Sá
- Federal Institute of Bahia, IFBA, Salvador, BA, Brazil
| | | | - Laena Pernomian
- Department of Cell Biology and Anatomy, University of South Carolina, Columbia, SC, USA; Cardiovascular Translational Research Center, University of South Carolina, Columbia, SC, USA
| | - Camilla F Wenceslau
- Department of Cell Biology and Anatomy, University of South Carolina, Columbia, SC, USA; Cardiovascular Translational Research Center, University of South Carolina, Columbia, SC, USA
| | - Fernanda Priviero
- Department of Cell Biology and Anatomy, University of South Carolina, Columbia, SC, USA; Cardiovascular Translational Research Center, University of South Carolina, Columbia, SC, USA
| | - R Clinton Webb
- Department of Cell Biology and Anatomy, University of South Carolina, Columbia, SC, USA; Cardiovascular Translational Research Center, University of South Carolina, Columbia, SC, USA
| | - Darizy F Silva
- Laboratory of Cardiovascular Physiology and Pharmacology, Bioregulation Department, Federal University of Bahia, UFBA, Salvador, Bahia, Brazil; Gonçalo Moniz Institute, FIOCRUZ, Salvador, BA, Brazil.
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Cavalcanti ALDM, Rocha PKL, Zhuge Z, Paulo LL, Mendes-Júnior LDG, Brandão MCR, Athayde-Filho PF, Lundberg JO, Weitzberg E, Carlström M, Braga VDA, Montenegro MF. Cardiovascular characterization of the novel organic mononitrate NDIBP in rats. Nitric Oxide 2022; 119:50-60. [PMID: 34958954 DOI: 10.1016/j.niox.2021.12.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2021] [Revised: 12/18/2021] [Accepted: 12/21/2021] [Indexed: 11/17/2022]
Abstract
Organic nitrates are widely used to restore endogenous nitric oxide (NO) levels reduced by endothelial nitric oxide synthase dysfunction. However, these drugs are associated with undesirable side effects, including tolerance. This study aims to investigate the cardiovascular effects of the new organic nitrate 1,3-diisobutoxypropan-2-yl nitrate (NDIBP). Specifically, we assessed its effects on blood pressure, vascular reactivity, acute toxicity, and the ability to induce tolerance. In vitro and ex vivo techniques showed that NDIBP released NO both in a cell-free system and in isolated mesenteric arteries preparations through a process catalyzed by xanthine oxidoreductase. NDIBP also evoked endothelium-independent vasorelaxation, which was significantly attenuated by 2-phenyl-4,4,5,5,-tetramethylimidazoline-1-oxyl 3-oxide (PTIO, 300 μM), a nitric oxide scavenger; 1-H-[1,2,4] oxadiazolo-[4,3-a]quinoxalin-1-one (ODQ, 10 μM), a soluble guanylyl cyclase inhibitor; tetraethylammonium (TEA, 3 mM), a potassium channel blocker; febuxostat (500 nM), a xanthine oxidase inhibitor; and proadifen (10 μM), an inhibitor of cytochrome P450 enzyme. Furthermore, this organic nitrate did not induce tolerance in isolated vessels and presented low toxicity following acute oral administration. In vivo changes on cardiovascular parameters were assessed using normotensive and renovascular hypertensive rats. NDIBP evoked a reduction of blood pressure that was significantly higher in hypertensive animals. Our results suggest that NDIBP acts as a NO donor, inducing blood pressure reduction without having the undesirable effects of tolerance. Those effects seem to be mediated by activation of NO-sGC-cGMP pathway and positive modulation of K+ channels in vascular smooth muscle.
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Affiliation(s)
| | - Patrícia Keytth Lins Rocha
- Biotechnology Center, Federal University of Paraíba, Cidade Universitária, 58051970, João Pessoa, PB, Brazil
| | - Zhengbing Zhuge
- Department of Physiology and Pharmacology, Karolinska Institutet, 171 65, Stockholm, Sweden
| | - Luciano Leite Paulo
- Biotechnology Center, Federal University of Paraíba, Cidade Universitária, 58051970, João Pessoa, PB, Brazil
| | | | | | - Petrônio F Athayde-Filho
- Department of Chemistry, Federal University of Paraíba, Cidade Universitária, 58059900, João Pessoa, PB, Brazil
| | - Jon O Lundberg
- Department of Physiology and Pharmacology, Karolinska Institutet, 171 65, Stockholm, Sweden
| | - Eddie Weitzberg
- Department of Physiology and Pharmacology, Karolinska Institutet, 171 65, Stockholm, Sweden
| | - Mattias Carlström
- Department of Physiology and Pharmacology, Karolinska Institutet, 171 65, Stockholm, Sweden
| | - Valdir de Andrade Braga
- Biotechnology Center, Federal University of Paraíba, Cidade Universitária, 58051970, João Pessoa, PB, Brazil.
| | - Marcelo F Montenegro
- Department of Physiology and Pharmacology, Karolinska Institutet, 171 65, Stockholm, Sweden
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3
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Hong YH, Narwane M, Liu LYM, Huang YD, Chung CW, Chen YH, Liao BW, Chang YH, Wu CR, Huang HC, Hsu IJ, Cheng LY, Wu LY, Chueh YL, Chen Y, Lin CH, Lu TT. Enhanced Oral NO Delivery through Bioinorganic Engineering of Acid-Sensitive Prodrug into a Transformer-like DNIC@MOF Microrod. ACS APPLIED MATERIALS & INTERFACES 2022; 14:3849-3863. [PMID: 35019259 DOI: 10.1021/acsami.1c21409] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Nitric oxide (NO) is an endogenous gasotransmitter regulating alternative physiological processes in the cardiovascular system. To achieve translational application of NO, continued efforts are made on the development of orally active NO prodrugs for long-term treatment of chronic cardiovascular diseases. Herein, immobilization of NO-delivery [Fe2(μ-SCH2CH2COOH)2(NO)4] (DNIC-2) onto MIL-88B, a metal-organic framework (MOF) consisting of biocompatible Fe3+ and 1,4-benzenedicarboxylate (BDC), was performed to prepare a DNIC@MOF microrod for enhanced oral delivery of NO. In simulated gastric fluid, protonation of the BDC linker in DNIC@MOF initiates its transformation into a DNIC@tMOF microrod, which consisted of DNIC-2 well dispersed and confined within the BDC-based framework. Moreover, subsequent deprotonation of the BDC-based framework in DNIC@tMOF under simulated intestinal conditions promotes the release of DNIC-2 and NO. Of importance, this discovery of transformer-like DNIC@MOF provides a parallel insight into its stepwise transformation into DNIC@tMOF in the stomach followed by subsequent conversion into molecular DNIC-2 in the small intestine and release of NO in the bloodstream of mice. In comparison with acid-sensitive DNIC-2, oral administration of DNIC@MOF results in a 2.2-fold increase in the oral bioavailability of NO to 65.7% in mice and an effective reduction of systolic blood pressure (SBP) to a ΔSBP of 60.9 ± 4.7 mmHg in spontaneously hypertensive rats for 12 h.
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Affiliation(s)
- Yong-Huei Hong
- Institute of Biomedical Engineering, National Tsing Hua University, Hsinchu 300044, Taiwan
| | - Manmath Narwane
- Institute of Biomedical Engineering, National Tsing Hua University, Hsinchu 300044, Taiwan
| | - Lawrence Yu-Min Liu
- Department of Medicine, Mackay Medical College, New Taipei City 252005, Taiwan
- Division of Cardiology, Department of Internal Medicine, Hsinchu MacKay Memorial Hospital, Hsinchu 300044, Taiwan
| | - Yi-Da Huang
- Institute of Biomedical Engineering, National Tsing Hua University, Hsinchu 300044, Taiwan
| | - Chieh-Wei Chung
- Institute of Biomedical Engineering, National Tsing Hua University, Hsinchu 300044, Taiwan
| | - Yi-Hong Chen
- Institute of Biomedical Engineering, National Tsing Hua University, Hsinchu 300044, Taiwan
| | - Bo-Wen Liao
- Institute of Biomedical Engineering, National Tsing Hua University, Hsinchu 300044, Taiwan
| | - Yu-Hsiang Chang
- Institute of Biomedical Engineering, National Tsing Hua University, Hsinchu 300044, Taiwan
| | - Cheng-Ru Wu
- Institute of Biomedical Engineering, National Tsing Hua University, Hsinchu 300044, Taiwan
| | - Hsi-Chien Huang
- Institute of Biomedical Engineering, National Tsing Hua University, Hsinchu 300044, Taiwan
| | - I-Jui Hsu
- Department of Molecular Science and Engineering, Research and Development Center of Smart Textile Technology, National Taipei University of Technology, Taipei 106344, Taiwan
| | - Ling-Yun Cheng
- Department of Bioscience Technology, Chung Yuan Christian University, Taoyuan 320314, Taiwan
| | - Liang-Yi Wu
- Department of Bioscience Technology, Chung Yuan Christian University, Taoyuan 320314, Taiwan
| | - Yu-Lun Chueh
- Department of Material Science and Engineering, National Tsing Hua University, Hsinchu 300044, Taiwan
| | - Yunching Chen
- Institute of Biomedical Engineering, National Tsing Hua University, Hsinchu 300044, Taiwan
| | - Chia-Her Lin
- Department of Chemistry, National Taiwan Normal University, Taipei 116059, Taiwan
| | - Tsai-Te Lu
- Institute of Biomedical Engineering, National Tsing Hua University, Hsinchu 300044, Taiwan
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4
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Costa PPC, Campos R, Cabral PHB, Gomes VM, Santos CF, Waller SB, de Sousa EHS, Lopes LGDF, Fonteles MC, do Nascimento NRF. Antihypertensive potential of cis-[Ru(bpy) 2(ImN)(NO)] 3+, a ruthenium-based nitric oxide donor. Res Vet Sci 2020; 130:153-160. [PMID: 32193002 DOI: 10.1016/j.rvsc.2020.03.014] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2019] [Revised: 03/03/2020] [Accepted: 03/06/2020] [Indexed: 12/17/2022]
Abstract
The aim of this study was to investigate the antihypertensive properties of cis-[Ru(bpy)2ImN(NO)]3+ (FOR0811) in normotensive and in Nω-nitro-L-arginine methyl ester (L-NAME)-induced hypertensive rats. Vasorelaxant effects were analyzed by performing concentration response curve to FOR0811 in rat aortic rings in the absence or presence of 1H-[1,2,4]-oxadiazolo-[4,3,-a]quinoxalin-1-one (ODQ), L-cysteine or hydroxocobalamin. Normotensive and L-NAME-hypertensive rats were treated with FOR0811 and the effects in blood pressure and heart rate variability in the frequency domain (HRV) were followed. FOR0811 induced relaxation in rat aortic rings. Neither endothelium removal nor L-cysteine altered the FOR0811 effects. However, the incubation with ODQ and hydroxocobalamin completely blunted FOR0811 effects. FOR0811 administered intravenously by bolus infusion (0.01-1 mg/bolus) or chronically by using subcutaneous implanted osmotic pumps significantly reduced the mean arterial blood pressure. The effect was long lasting and did not induce reflex tachycardia. FOR0811 prevented both LF and VLF increases in L-NAME hypertensive rats and has antihypertensive properties. This new ruthenium complex compound might be a promising nitric oxide donor to treat cardiovascular diseases.
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Affiliation(s)
- Paula Priscila Correia Costa
- Superior Institute of Biomedical Sciences, Ceará State University, Fortaleza, CE, Brazil; Department of Veterinary Clinic, College of Veterinary Medicine, Federal University of Pelotas, Pelotas, RS, Brazil
| | - Rafael Campos
- Superior Institute of Biomedical Sciences, Ceará State University, Fortaleza, CE, Brazil
| | | | - Victor Martins Gomes
- Superior Institute of Biomedical Sciences, Ceará State University, Fortaleza, CE, Brazil
| | | | - Stefanie Bressan Waller
- Department of Veterinary Clinic, College of Veterinary Medicine, Federal University of Pelotas, Pelotas, RS, Brazil
| | - Eduardo Henrique Silva de Sousa
- Laboratory of Bioinorganic Chemistry, Department of Organic and In organic Chemistry, Federal University of Ceará, Fortaleza, CE, Brazil
| | - Luiz Gonzaga de França Lopes
- Laboratory of Bioinorganic Chemistry, Department of Organic and In organic Chemistry, Federal University of Ceará, Fortaleza, CE, Brazil
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Perrin-Sarrado C, Zhou Y, Salgues V, Parent M, Giummelly P, Lartaud I, Gaucher C. S-Nitrosothiols as potential therapeutics to induce a mobilizable vascular store of nitric oxide to counteract endothelial dysfunction. Biochem Pharmacol 2020; 173:113686. [DOI: 10.1016/j.bcp.2019.113686] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2019] [Accepted: 10/24/2019] [Indexed: 12/14/2022]
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6
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Araújo AV, Andrade FA, Paulo M, de Paula TD, Potje SR, Pereira AC, Bendhack LM. NO donors induce vascular relaxation by different cellular mechanisms in hypertensive and normotensive rats. Nitric Oxide 2019; 86:12-20. [DOI: 10.1016/j.niox.2019.02.004] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2018] [Revised: 02/01/2019] [Accepted: 02/13/2019] [Indexed: 12/25/2022]
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7
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Endothelial modulation of a nitric oxide donor complex-induced relaxation in normotensive and spontaneously hypertensive rats. Life Sci 2018; 201:130-140. [DOI: 10.1016/j.lfs.2018.03.055] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2017] [Revised: 03/14/2018] [Accepted: 03/27/2018] [Indexed: 12/29/2022]
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8
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Potje SR, Chen Z, Oliveira SDS, Bendhack LM, da Silva RS, Bonini MG, Antoniali C, Minshall RD. Nitric oxide donor [Ru(terpy)(bdq)NO] 3+ induces uncoupling and phosphorylation of endothelial nitric oxide synthase promoting oxidant production. Free Radic Biol Med 2017; 112:587-596. [PMID: 28899725 PMCID: PMC5647835 DOI: 10.1016/j.freeradbiomed.2017.09.004] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/29/2017] [Revised: 09/05/2017] [Accepted: 09/06/2017] [Indexed: 02/07/2023]
Abstract
[Ru(terpy)(bdq)NO]3+ (TERPY) is a nitric oxide (NO) donor that promotes relaxation of the mesenteric artery and aorta in rats. We sought to investigate whether it acts as both an NO donor and endothelial NO synthase (eNOS) activator, as shown previously for nitroglycerin. Human umbilical vein endothelial cells (HUVECs) and human embryonic kidney 293 cells transfected with empty vector (HEK) or eNOS cDNA (HEK-eNOS) were treated with TERPY (1µM) for different lengths of time. eNOS expression, dimerization, and Ser1177 phosphorylation, caveolin-1 (Cav-1) oligomerization, Cav-1 Tyr14 phosphorylation were evaluated by Western blotting. Studies also assessed the production of reactive oxygen/nitrogen species (ROS/RNS) in HUVECs and HEK-eNOS cells. In HEK cells devoid of eNOS, TERPY released NO without additional stimulus indicating that is an NO donor. Moreover, in HEK-eNOS cells, TERPY-induced NO production that was blocked by L-NAME. In addition, TERPY increased ROS and ONOO- production which were blocked by more than 80% by BH4 (essential eNOS co-factor) and eNOS siRNA. These results suggest that TERPY-induced ROS and ONOO- production were originated from eNOS. HUVECs stimulated with TERPY showed increased eNOS Ser1177 and Cav-1 Tyr14 phosphorylation, and decreased eNOS dimerization, Cav-1 oligomerization, and Cav-1/eNOS interaction after 20min. It suggests that TERPY induces eNOS hyperactivation and uncoupling by disrupting Cav-1/eNOS interaction and depleting BH4. Endothelium-dependent vasodilation in response to NO donor TERPY is associated with eNOS activation and uncoupling, and thereby appears to be mediated, at least in part, via eNOS-dependent ROS/RNS production.
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Affiliation(s)
- Simone R Potje
- Programa Multicêntrico de Pós-graduação em Ciências Fisiológicas, Department of Basic Sciences, School of Dentistry, São Paulo State University, Araçatuba, Brazil; Department of Anesthesiology, University of Illinois at Chicago, Chicago, IL, USA
| | - Zhenlong Chen
- Department of Anesthesiology, University of Illinois at Chicago, Chicago, IL, USA
| | | | - Lusiane M Bendhack
- Department of Physics and Chemistry, School of Pharmaceutical Sciences, University of São Paulo, Ribeirão Preto, Brazil
| | - Roberto S da Silva
- Department of Physics and Chemistry, School of Pharmaceutical Sciences, University of São Paulo, Ribeirão Preto, Brazil
| | - Marcelo G Bonini
- Department of Medicine, University of Illinois at Chicago, Chicago, IL, USA
| | - Cristina Antoniali
- Programa Multicêntrico de Pós-graduação em Ciências Fisiológicas, Department of Basic Sciences, School of Dentistry, São Paulo State University, Araçatuba, Brazil.
| | - Richard D Minshall
- Department of Anesthesiology, University of Illinois at Chicago, Chicago, IL, USA; Department of Pharmacology, University of Illinois at Chicago, Chicago, IL, USA.
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9
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Hypotensive effect and vascular relaxation in different arteries induced by the nitric oxide donor RuBPY. Nitric Oxide 2017; 62:11-16. [DOI: 10.1016/j.niox.2016.11.001] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2016] [Revised: 11/01/2016] [Accepted: 11/04/2016] [Indexed: 11/21/2022]
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Pauwels B, Boydens C, Vanden Daele L, Van de Voorde J. Ruthenium-based nitric oxide-donating and carbon monoxide-donating molecules. J Pharm Pharmacol 2016; 68:293-304. [DOI: 10.1111/jphp.12511] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2015] [Accepted: 11/29/2015] [Indexed: 01/10/2023]
Abstract
Abstract
Objectives
Over the past few years, the use of metallocomplexes for medical purposes has considerably grown. Because of its favourable characteristics, ruthenium has taken a significant place in this expanding field of research. Several ruthenium-containing metal compounds have been developed as delivery agents of physiological important molecules such as nitric oxide (NO) and carbon monoxide (CO).
Key findings
This review focuses on the (vaso)relaxant capacity of ruthenium-based NO-donating and CO-donating molecules in view of their potential usefulness in the treatment of cardiovascular diseases and erectile dysfunction.
Summary
Ruthenium seems to be a valuable candidate for the design of NO-donating and CO-donating molecules. To date, ruthenium remains of interest in drug research as the search for new alternatives is still necessary.
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Affiliation(s)
- Bart Pauwels
- Department of Pharmacology, Ghent University, Ghent, Belgium
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11
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Troiano JA, Potje SR, Graton ME, Cavalari P, Pereira AAF, Vale GT, Nakamune ACMS, Sumida DH, Tirapelli CR, Antoniali C. Decreased reactive oxygen species production and NOX1, NOX2, NOX4 expressions contribute to hyporeactivity to phenylephrine in aortas of pregnant SHR. Life Sci 2015; 144:178-84. [PMID: 26674464 DOI: 10.1016/j.lfs.2015.12.011] [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: 06/26/2015] [Revised: 11/04/2015] [Accepted: 12/04/2015] [Indexed: 02/07/2023]
Abstract
AIMS We determined whether decreased reactive oxygen species (ROS) production in the aorta of pregnant spontaneously hypertensive rats (SHR) resulted in increased nitric oxide (NO) bioavailability and hyporeactivity to phenylephrine (PE). MAIN METHODS Systemic and aortic oxidative stress were measured in pregnant and non-pregnant Wistar rats and SHR. Furthermore, the hypotensive effects of apocynin (30 mg/kg) and Tempol (30 mg/kg) were analyzed. Intact aortic rings of pregnant and non-pregnant rats were stimulated with PE in the absence of or after incubation (30 min) with apocynin (100 μmol/L). The effect of apocynin on the concentrations of NO and ROS were measured in aortic endothelial cells (AEC) using DAF-2DA (10 mmol/L) and DHE (2.5 mmol/L), respectively. Western blotting was performed to analyze eNOS, NOX1, NOX2, NOX4 and SOD expression. ROS production was analyzed by the lucigenin chemiluminescence method. KEY FINDINGS Aortic oxidative stress and ROS concentration in AEC were reduced in pregnant Wistar rats and SHR, when compared to non-pregnant rats. ROS production and NOX1, NOX2 and NOX4 expression in the aortas were decreased in pregnant SHR, but not in pregnant Wistar rats. Increased eNOS expression in aortas and NO concentration in AEC were observed in pregnant Wistar rats and SHR. Apocynin reduced PE-induced vasoconstriction in the aortas of non-pregnant Wistar rats and SHR, and pregnant Wistar rats, but not in the aortas of pregnant SHR. SIGNIFICANCE Taken together, these results suggest that ROS production was decreased in the aortas of pregnant SHR and could contribute to higher NO bioavailability and hyporeactivity to PE in the aortas of pregnant SHR.
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Affiliation(s)
- J A Troiano
- Programa de Pós-Graduação Multicêntrico em Ciências Fisiológicas, SBFis, Brazil; Department of Basic Sciences, School of Dentistry of Araçatuba, UNESP - Univ Estadual Paulista, Araçatuba, São Paulo, Brazil
| | - S R Potje
- Programa de Pós-Graduação Multicêntrico em Ciências Fisiológicas, SBFis, Brazil; Department of Basic Sciences, School of Dentistry of Araçatuba, UNESP - Univ Estadual Paulista, Araçatuba, São Paulo, Brazil
| | - M E Graton
- Programa de Pós-Graduação Multicêntrico em Ciências Fisiológicas, SBFis, Brazil; Department of Basic Sciences, School of Dentistry of Araçatuba, UNESP - Univ Estadual Paulista, Araçatuba, São Paulo, Brazil
| | - P Cavalari
- Department of Basic Sciences, School of Dentistry of Araçatuba, UNESP - Univ Estadual Paulista, Araçatuba, São Paulo, Brazil; School of Pharmacy of Araçatuba, UNIP - Univ Paulista, Araçatuba, São Paulo, Brazil
| | - A A F Pereira
- Programa de Pós-Graduação Multicêntrico em Ciências Fisiológicas, SBFis, Brazil; Department of Basic Sciences, School of Dentistry of Araçatuba, UNESP - Univ Estadual Paulista, Araçatuba, São Paulo, Brazil
| | - G T Vale
- Department of Psychiatry Nursing and Human Sciences, College of Nursing of Ribeirão Preto, USP - University of São Paulo, Ribeirão Preto, São Paulo, Brazil
| | - A C M S Nakamune
- Programa de Pós-Graduação Multicêntrico em Ciências Fisiológicas, SBFis, Brazil; Department of Basic Sciences, School of Dentistry of Araçatuba, UNESP - Univ Estadual Paulista, Araçatuba, São Paulo, Brazil
| | - D H Sumida
- Programa de Pós-Graduação Multicêntrico em Ciências Fisiológicas, SBFis, Brazil; Department of Basic Sciences, School of Dentistry of Araçatuba, UNESP - Univ Estadual Paulista, Araçatuba, São Paulo, Brazil
| | - C R Tirapelli
- Department of Psychiatry Nursing and Human Sciences, College of Nursing of Ribeirão Preto, USP - University of São Paulo, Ribeirão Preto, São Paulo, Brazil
| | - C Antoniali
- Programa de Pós-Graduação Multicêntrico em Ciências Fisiológicas, SBFis, Brazil; Department of Basic Sciences, School of Dentistry of Araçatuba, UNESP - Univ Estadual Paulista, Araçatuba, São Paulo, Brazil.
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12
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Mendes-Júnior LDG, Guimarães DD, Gadelha DDA, Diniz TF, Brandão MCR, Athayde-Filho PF, Lemos VS, França-Silva MDS, Braga VA. The new nitric oxide donor cyclohexane nitrate induces vasorelaxation, hypotension, and antihypertensive effects via NO/cGMP/PKG pathway. Front Physiol 2015; 6:243. [PMID: 26379557 PMCID: PMC4553900 DOI: 10.3389/fphys.2015.00243] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2015] [Accepted: 08/13/2015] [Indexed: 12/19/2022] Open
Abstract
We investigated the cardiovascular effects induced by the nitric oxide donor Cyclohexane Nitrate (HEX). Vasodilatation, NO release and the effects of acute or sub-chronic treatment with HEX on cardiovascular parameters were evaluated. HEX induced endothelium-independent vasodilatation (Maximum effect [efficacy, ME] = 100.4 ± 4.1%; potency [pD2] = 5.1 ± 0.1). Relaxation was attenuated by scavenging nitric oxide (ME = 44.9 ± 9.4% vs. 100.4 ± 4.1%) or by inhibiting the soluble guanylyl cyclase (ME = 38.5 ± 9.7% vs. 100.4 ± 4.1%). In addition, pD2 was decreased after non-selective blockade of K+ channels (pD2 = 3.6 ± 0.1 vs. 5.1 ± 0.1) or by inhibiting KATP channels (pD2 = 4.3 ± 0.1 vs. 5.1 ± 0.1). HEX increased NO levels in mesenteric arteries (33.2 ± 2.3 vs. 10.7 ± 0.2 au, p < 0.0001). Intravenous acute administration of HEX (1–20 mg/kg) induced hypotension and bradycardia in normotensive and hypertensive rats. Furthermore, starting at 6 weeks after the induction of 2K1C hypertension, oral treatment with the HEX (10 mg/Kg/day) for 7 days reduced blood pressure in hypertensive animals (134 ± 6 vs. 170 ± 4 mmHg, respectively). Our data demonstrate that HEX is a NO donor able to produce vasodilatation via NO/cGMP/PKG pathway and activation of the ATP-sensitive K+ channels. Furthermore, HEX acutely reduces blood pressure and heart rate as well as produces antihypertensive effect in renovascular hypertensive rats.
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Affiliation(s)
| | | | | | - Thiago F Diniz
- Department of Physiology and Biophysics, Institute of Biological Sciences, Federal University of Minas Gerais Belo Horizonte, Brazil
| | - Maria C R Brandão
- Department of Chemistry, Federal University of Paraíba João Pessoa, Brazil
| | | | - Virginia S Lemos
- Department of Physiology and Biophysics, Institute of Biological Sciences, Federal University of Minas Gerais Belo Horizonte, Brazil
| | | | - Valdir A Braga
- Biotechnology Center, Federal University of Paraíba João Pessoa, Brazil
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Kangussu LM, Olivon VC, Arifa RDDN, Araújo N, Reis D, Assis MTDA, Soriani FM, de Souza DDG, Bendhack LM, Bonaventura D. Enhancement on reactive oxygen species and COX-1 mRNA levels modulate the vascular relaxation induced by sodium nitroprusside in denuded mice aorta. Fundam Clin Pharmacol 2015; 29:150-63. [PMID: 25619310 DOI: 10.1111/fcp.12103] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2014] [Revised: 01/21/2015] [Accepted: 01/21/2015] [Indexed: 11/29/2022]
Abstract
This study aimed to investigate the modulation of nitric oxide/reactive oxygen species in sodium nitroprusside relaxation in mice aorta. Sodium nitroprusside induced relaxation in endothelium-intact (e+) and endothelium-denuded (e-) aortas with greater potency in e+ than in e-. The nitric oxide synthase inhibitor did not alter the sodium nitroprusside relaxation in both e+ and e- aortas. However, the superoxide anion scavenger abolished the difference in sodium nitroprusside potency between e+ and e-. Sodium nitroprusside reduced dihydroethidium-derived fluorescent products in both groups; however, the difference between intact and denuded mice aorta remains. The glutathione levels and basal antioxidant activity of superoxide dismutase were reduced in e- aorta when compared with e+, and these values were not altered by sodium nitroprusside. Confirming these results, the levels of lipid peroxidation in e+ were significantly lower when compared to e-, and these values were not altered by sodium nitroprusside. The sodium nitroprusside potency in the presence of a nonselective COX inhibitor or the EP/DP prostaglandin receptor antagonist in endothelium denuded was similar to that in intact mice aorta. Based on these results, we performed the COX-1 and COX-2 mRNA level studies, and in denuded mice aorta, there was an upregulation in COX-1 mRNA levels. Taken together, our findings show that in the absence of endothelium, there is an enhancement of superoxide levels, leading to GSH consumption and higher levels of lipid peroxidation, showing an intense redox status. Furthermore, in denuded mice aorta, there was an upregulation of COX-1 mRNA expression, leading to vasoconstrictor prostanoids synthesis. The interaction of vasoconstrictor prostanoids with its receptors EP/DP negatively modulates the vascular relaxation induced by SNP in denuded mice aorta.
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Affiliation(s)
- Lucas M Kangussu
- Departamento de Farmacologia, ICB, Universidade Federal de Minas Gerais, 31.270-901, Belo Horizonte-MG, Brazil
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14
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Potje SR, Munhoz FC, Perassa LA, Graton ME, Pereira AA, Nakamune ACM, da Silva RS, Bendhack LM, Sumida DH, Antoniali C. Mechanisms underlying the hypotensive and vasodilator effects of Ru(terpy)(bdq)NO]3+, a nitric oxide donor, differ between normotensive and spontaneously hypertensive rats. Eur J Pharmacol 2014; 741:222-9. [DOI: 10.1016/j.ejphar.2014.08.008] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2014] [Revised: 08/14/2014] [Accepted: 08/18/2014] [Indexed: 01/08/2023]
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15
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Ruthenium complexes as NO donors for vascular relaxation induction. Molecules 2014; 19:9628-54. [PMID: 25004072 PMCID: PMC6271244 DOI: 10.3390/molecules19079628] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2014] [Revised: 06/09/2014] [Accepted: 06/26/2014] [Indexed: 11/17/2022] Open
Abstract
Nitric oxide (NO) donors are substances that can release NO. Vascular relaxation induction is among the several functions of NO, and the administration of NO donors is a pharmacological alternative to treat hypertension. This review will focus on the physicochemical description of ruthenium-derived NO donor complexes that release NO via reduction and light stimulation. In particular, we will discuss the complexes synthesized by our research group over the last ten years, and we will focus on the vasodilation and arterial pressure control elicited by these complexes. Soluble guanylyl cyclase (sGC) and potassium channels are the main targets of the NO species released from the inorganic compounds. We will consider the importance of the chemical structure of the ruthenium complexes and their vascular effects.
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16
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Silva BR, Pernomian L, Grando MD, Bendhack LM. Phenylephrine activates eNOS Ser 1177 phosphorylation and nitric oxide signaling in renal hypertensive rat aorta. Eur J Pharmacol 2014; 738:192-9. [PMID: 24886887 DOI: 10.1016/j.ejphar.2014.05.040] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2014] [Revised: 05/21/2014] [Accepted: 05/22/2014] [Indexed: 10/25/2022]
Abstract
The endothelial nitric oxide synthase (eNOS) plays an important role in the control of the vascular tone. This work aimed to evaluate the role of an α1-adrenoceptor agonist phenylephrine (PE) on eNOS activity and downstream signaling pathway activation in normotensive (2K) and renal hypertensive (2K-1C) intact-endothelium rat aortas. Concentration-effect curves were performed for PE in intact-endothelium aortas from 2K and 2K-1C rats, in the absence of or in the presence of NOS or soluble guanylyl cyclase (sGC) inhibitor. Intact endothelium aortas were stimulated with PE in organ chambers and eNOS Ser(1177)/Thr(495) phosphorylation expression was evaluated by western blot. Nitric Oxide (NO) production was evaluated in isolated endothelial cells from 2K and 2K-1C rat aortas by flow-cytometry using NO selective fluorescent probe, DAF-2DA. The sGC activity/expression was also evaluated. PE-induced contractile response is lower in 2K-1C than in 2K intact-endothelium rat aorta. This is due to higher eNOS Ser(1177) phosphorylation in 2K-1C, which induces the eNOS overactivation. It was abolished by NOS or sGC inhibition. Phenylephrine reduces NO production in 2K as compared to the basal level, but it is not modified in 2K-1C. In PE-stimulated endothelial cells, the NO production is higher in 2K-1C than in 2K. Phenylephrine induces higher cGMP production in 2K-1C than in 2K, despite the lower expression of sGC in 2K-1C. Our results suggest that alpha1-adrenoceptor activation contributes to the increased activity of the enzyme eNOS by Ser(1177) phosphorylation in 2K-1C intact-endothelium aorta, which consequently decreases PE-induced contractile response.
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Affiliation(s)
- Bruno R Silva
- Laboratory of Pharmacology, Faculty of Pharmaceutical Sciences of Ribeirão Preto, University of São Paulo, Av. do Café s/n, 14040-903 Ribeirão Preto, Sao Paulo, Brazil.
| | - Laena Pernomian
- Department of Pharmacology, School of Medicine of Ribeirão Preto, University of São Paulo, 14049-900 Ribeirão Preto, Sao Paulo, Brazil
| | - Marcella D Grando
- Laboratory of Pharmacology, Faculty of Pharmaceutical Sciences of Ribeirão Preto, University of São Paulo, Av. do Café s/n, 14040-903 Ribeirão Preto, Sao Paulo, Brazil
| | - Lusiane M Bendhack
- Laboratory of Pharmacology, Faculty of Pharmaceutical Sciences of Ribeirão Preto, University of São Paulo, Av. do Café s/n, 14040-903 Ribeirão Preto, Sao Paulo, Brazil
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da Cunha NV, Pinge-Filho P, Panis C, Silva BR, Pernomian L, Grando MD, Cecchini R, Bendhack LM, Martins-Pinge MC. Decreased endothelial nitric oxide, systemic oxidative stress, and increased sympathetic modulation contribute to hypertension in obese rats. Am J Physiol Heart Circ Physiol 2014; 306:H1472-80. [PMID: 24633548 DOI: 10.1152/ajpheart.00520.2013] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
We investigated the involvement of nitric oxide (NO) and reactive oxygen species (ROS) on autonomic cardiovascular parameters, vascular reactivity, and endothelial cells isolated from aorta of monosodium glutamate (MSG) obese rats. Obesity was induced by administration of 4 mg/g body wt of MSG or equimolar saline [control (CTR)] to newborn rats. At the 60th day, the treatment was started with N(G)-nitro-L-arginine methyl ester (L-NAME, 20 mg/kg) or 0.9% saline. At the 90th day, after artery catheterization, mean arterial pressure (MAP) and heart rate were recorded. Plasma was collected to assess lipid peroxidation. Endothelial cells isolated from aorta were evaluated by flow cytometry and fluorescence intensity (FI) emitted by NO-sensitive dye [4,5-diaminofluoresceindiacetate (DAF-2DA)] and by ROS-sensitive dye [dihydroethidium (DHE)]. Vascular reactivity was made by concentration-response curves of acetylcholine. MSG showed hypertension compared with CTR. Treatment with L-NAME increased MAP only in CTR. The MSG induced an increase in the low-frequency (LF) band and a decrease in the high-frequency band of pulse interval. L-NAME treatment increased the LF band of systolic arterial pressure only in CTR without changes in MSG. Lipid peroxidation levels were higher in MSG and were attenuated after L-NAME. In endothelial cells, basal FI to DAF was higher in CTR than in MSG. In both groups, acetylcholine increased FI for DAF from basal. The FI baseline to DHE was higher in MSG than in CTR. Acetylcholine increased FI to DHE in the CTR group, but decreased in MSG animals. We suggest that reduced NO production and increased production of ROS may contribute to hypertension in obese MSG animals.
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Affiliation(s)
| | - Phileno Pinge-Filho
- Department of Pathological Sciences State University of Londrina, Londrina, PR
| | - Carolina Panis
- Department of Pathological Sciences State University of Londrina, Londrina, PR
| | - Bruno Rodrigues Silva
- Department of Pharmacology, School of Medicine of Ribeirão Preto, University of São Paulo, Ribeirão Preto, SP, Brazil; and
| | - Laena Pernomian
- Department of Pharmacology, School of Medicine of Ribeirão Preto, University of São Paulo, Ribeirão Preto, SP, Brazil; and
| | - Marcella Daruge Grando
- Faculty of Pharmaceutical Sciences of Ribeirão Preto, Department of Physics and Chemistry, University of São Paulo, Ribeirão Preto, SP, Brazil
| | - Rubens Cecchini
- Department of Pathological Sciences State University of Londrina, Londrina, PR
| | - Lusiane Maria Bendhack
- Faculty of Pharmaceutical Sciences of Ribeirão Preto, Department of Physics and Chemistry, University of São Paulo, Ribeirão Preto, SP, Brazil
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18
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Agarwala H, Ehret F, Chowdhury AD, Maji S, Mobin SM, Kaim W, Lahiri GK. Electronic structure and catalytic aspects of [Ru(tpm)(bqdi)(Cl/H2O)]n, tpm = tris(1-pyrazolyl)methane and bqdi = o-benzoquinonediimine. Dalton Trans 2013; 42:3721-34. [PMID: 23302760 DOI: 10.1039/c2dt32402d] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Affiliation(s)
- Hemlata Agarwala
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai-400076, India
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19
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Silva BR, Pernomian L, Bendhack LM. Contribution of oxidative stress to endothelial dysfunction in hypertension. Front Physiol 2012; 3:441. [PMID: 23227009 PMCID: PMC3514688 DOI: 10.3389/fphys.2012.00441] [Citation(s) in RCA: 85] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2012] [Accepted: 11/05/2012] [Indexed: 12/12/2022] Open
Abstract
Endothelial dysfunction is the hallmark of hypertension, which is a multifactorial disorder. In the cardiovascular system reactive oxygen species play a pivotal role in controlling the endothelial function and vascular tone. Physiologically, the endothelium-derived relaxing factors (EDRFs) and endothelium-derived contractile factors (EDCFs) that have functions on the vascular smooth muscle cells. The relaxation induced by the EDRFs nitric oxide (NO), prostacyclin, and the endothelium-derived hyperpolarization factor (EDHF) could be impaired in hypertension. The impaired ability of endothelial cells to release NO along with enhanced EDCFs production has been described to contribute to the endothelium dysfunction, which appears to lead to several cardiovascular diseases. The present review discusses the role of oxidative stress, vascular endothelium, and vascular tone control by EDRFs, mainly NO, and EDCFs in different models of experimental hypertension.
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Affiliation(s)
- Bruno R Silva
- Department of Pharmacology, School of Medicine of Ribeirão Preto, University of São Paulo, Ribeirão Preto São Paulo, Brazil
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20
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Carneiro ZA, de Moraes JCB, Rodrigues FP, de Lima RG, Curti C, da Rocha ZN, Paulo M, Bendhack LM, Tedesco AC, Formiga ALB, da Silva RS. Photocytotoxic activity of a nitrosyl phthalocyanine ruthenium complex — A system capable of producing nitric oxide and singlet oxygen. J Inorg Biochem 2011; 105:1035-43. [DOI: 10.1016/j.jinorgbio.2011.04.011] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2011] [Revised: 04/22/2011] [Accepted: 04/25/2011] [Indexed: 12/14/2022]
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21
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Celotto AC, Capellini VK, Restini CBA, Baldo CF, Bendhack LM, Evora PRB. Extracellular alkalinization induces endothelium-derived nitric oxide dependent relaxation in rat thoracic aorta. Nitric Oxide 2010; 23:269-74. [PMID: 20682356 DOI: 10.1016/j.niox.2010.07.008] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2010] [Revised: 07/10/2010] [Accepted: 07/29/2010] [Indexed: 10/19/2022]
Abstract
AIM To investigate the mechanism through which the extracellular alkalinization promotes relaxation in rat thoracic aorta. METHODS The relaxation response to NaOH-induced extracellular alkalinization (7.4-8.5) was measured in aortic rings pre-contracted with phenylephrine (Phe, 10(-6) M). The vascular reactivity experiments were performed in endothelium-intact and -denuded rings, in the presence or and absence of indomethacin (10(-5) M), NG-nitro-l-arginine methyl ester (L-NAME, 10(-4) M), N-(6-Aminohexyl)-5-chloro-1-naphthalenesulfonamide/HCl (W-7, 10(-7) M), 2,5-dimethylbenzimidazole (DMB, 2×10(-5) M) and methyl-β-cyclodextrin (10(-2) M). In addition, the effects of NaOH-induced extracellular alkalinization (pH 8.0 and 8.5) on the intracellular nitric oxide (NO) concentration was evaluated in isolated endothelial cells loaded with diaminofluorescein-FM diacetate (DAF-FM DA, 5 μM), in the presence and absence of DMB (2×10(-5) M). RESULTS The extracellular alkalinization failed to induce any change in vascular tone in aortic rings pre-contracted with KCl. In rings pre-contracted with Phe, the extracellular alkalinization caused relaxation in the endothelium-intact rings only, and this relaxation was maintained after cyclooxygenase inhibition; completely abolished by the inhibition of nitric oxide synthase (NOS), Ca(2+)/calmodulin and Na(+)/Ca(2+) exchanger (NCX), and partially blunted by the caveolae disassembly. CONCLUSIONS These results suggest that, in rat thoracic aorta, that extracellular alkalinization with NaOH activates the NCX reverse mode of endothelial cells in rat thoracic aorta, thereby the intracellular Ca(2+) concentration and activating the Ca(2+)/calmodulin-dependent NOS. In turn, NO is released promoting relaxation.
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Affiliation(s)
- A C Celotto
- Laboratory of Endothelial Function, Department of Surgery and Anatomy, School of Medicine, University of São Paulo, Ribeirão Preto, SP, Brazil
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22
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Lever A. Electronic characteristics of an extensive series of ruthenium complexes with the non-innocent o-benzoquinonediimine ligand: A pedagogical approach. Coord Chem Rev 2010. [DOI: 10.1016/j.ccr.2010.02.022] [Citation(s) in RCA: 57] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Haug A, Olesen I, Christophersen OA. Individual variation and intraclass correlation in arachidonic acid and eicosapentaenoic acid in chicken muscle. Lipids Health Dis 2010; 9:37. [PMID: 20398309 PMCID: PMC2875212 DOI: 10.1186/1476-511x-9-37] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2009] [Accepted: 04/15/2010] [Indexed: 02/07/2023] Open
Abstract
Chicken meat with reduced concentration of arachidonic acid (AA) and reduced ratio between omega-6 and omega-3 fatty acids has potential health benefits because a reduction in AA intake dampens prostanoid signaling, and the proportion between omega-6 and omega-3 fatty acids is too high in our diet. Analyses for fatty acid determination are expensive, and finding the optimal number of analyses to give reliable results is a challenge. The objective of the present study was i) to analyse the intraclass correlation of different fatty acids in five meat samples, of one gram each, within the same chicken thigh, and ii) to study individual variations in the concentrations of a range of fatty acids and the ratio between omega-6 and omega-3 fatty acid concentrations among fifteen chickens. Fifteen newly hatched broilers were fed a wheat-based diet containing 4% rapeseed oil and 1% linseed oil for three weeks. Five muscle samples from the mid location of the thigh of each chicken were analysed for fatty acid composition. The intraclass correlation (sample correlation within the same animal) was 0.85-0.98 for the ratios of total omega-6 to total omega-3 fatty acids and of AA to eicosapentaenoic acid (EPA). This indicates that when studying these fatty acid ratios, one sample of one gram per animal is sufficient. However, due to the high individual variation between chicken for these ratios, a relatively high number of animals (minimum 15) are required to obtain a sufficiently high power to reveal significant effects of experimental factors (e.g. feeding regimes). The present experiment resulted in meat with a favorable concentration ratio between omega-6 and omega-3 fatty acids. The AA concentration varied from 1.5 to 2.8 g/100 g total fatty acids in thigh muscle in the fifteen broilers, and the ratio between AA and EPA concentrations ranged from 2.3 to 3.9. These differences among the birds may be due to genetic variance that can be exploited by breeding for lower AA concentration and/or a more favorable AA/EPA ratio to produce meat with health benefits.
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Affiliation(s)
- Anna Haug
- Department of Animal and Aquacultural Sciences, Norwegian University of Life Sciences, N-1432 Ås, Norway
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