1
|
Wani SA, Khan LA, Basir SF. Quercetin and resveratrol ameliorate nickel-mediated hypercontraction in isolated Wistar rat aorta. J Smooth Muscle Res 2022; 58:89-105. [PMID: 36517014 PMCID: PMC9748311 DOI: 10.1540/jsmr.58.89] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
PURPOSE The ameliorative potential of quercetin and resveratrol on isolated endothelium-intact aortic rings incubated with nickel was examined. METHOD The effect of varying concentrations of quercetin and resveratrol was investigated on isolated Wistar rat aortic rings using an organ bath system over vasoconstrictor phenylephrine (PE) at 1 µM. To delineate the mechanism of action, isolated aortic rings were pre-incubated with pharmacological modulators, such as verapamil 1 µM, apocynin 100 µM, indomethacin 100 µM or N-G-nitro-L-arginine methyl ester (L-NAME) 100 µM, separately, before incubation with 100 µM quercetin and 30 µM resveratrol. To assess the ameliorative and prophylactic potentials of quercetin and resveratrol, aortic rings were also incubated with quercetin or resveratrol for 40 min, followed by incubation with nickel for 40 min. RESULTS At 100 µM, quercetin caused 29% inhibition of contraction, while resveratrol at 30 µM caused 55% inhibition of contraction in aortic rings compared with control. Aortic rings incubated with contractile modulators, such as verapamil, apocynin, indomethacin or N-G-nitro-L-arginine methyl ester (L-NAME), along with quercetin or resveratrol at their concentrations producing maximum relaxant effect, showed that both of these natural compounds exert their relaxant effect by inhibiting the generation of reactive oxygen species (ROS) from endothelial and smooth muscle cells, blocking voltage-gated calcium channels, and increasing the release of nitric oxide (NO). The mediation of hypercontraction by nickel is due to the increased ROS and the influx of calcium through voltage-dependent calcium channels. These natural compounds are shown to counter the nickel-induced effects, appearing as effective ameliorators. CONCLUSION In this study, we found that quercetin and resveratrol act as ameliorators of nickel-mediated hypercontraction by decreasing ROS and enhancing NO release from endothelial cells.
Collapse
Affiliation(s)
- Shahnawaz Ahmad Wani
- Department of Biosciences, Faculty of Natural Science, Jamia Millia Islamia,
New Delhi 110025, India
| | - Luqman Ahmad Khan
- Department of Biosciences, Faculty of Natural Science, Jamia Millia Islamia,
New Delhi 110025, India
| | - Seemi Farhat Basir
- Department of Biosciences, Faculty of Natural Science, Jamia Millia Islamia,
New Delhi 110025, India
| |
Collapse
|
2
|
Osikoya O, Cushen SC, Ricci CA, Goulopoulou S. Cyclooxygenase-dependent mechanisms mediate in part the anti-dilatory effects of perivascular adipose tissue in uterine arteries from pregnant rats. Pharmacol Res 2021; 171:105788. [PMID: 34311071 PMCID: PMC8439575 DOI: 10.1016/j.phrs.2021.105788] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/19/2021] [Revised: 07/07/2021] [Accepted: 07/22/2021] [Indexed: 10/20/2022]
Abstract
Uterine perivascular adipose tissue (PVAT) contributes to uterine blood flow regulation in pregnancy, at least in part, due to its effects on uterine artery reactivity. We tested the hypothesis that uterine PVAT modulates the balance between the contribution of nitric oxide synthase (NOS)- and cyclooxygenase (COX)-dependent pathways to acetylcholine (ACh)-induced relaxation in isolated uterine arteries. Concentration-response curves to ACh (1 nM - 30 µM) were performed on uterine arteries from pregnant and non-pregnant rats. Arteries were exposed to Krebs-Henseleit solution (control) or PVAT-conditioned media (PVATmedia) in the presence of the following inhibitors: L-NAME (NOS inhibitor), indomethacin (COX inhibitor), SC560 (COX-1 inhibitor), NS398 (COX-2 inhibitor), SQ 29,548 (thromboxane receptor (TP) inhibitor). In arteries incubated with PVATmedia, the presence of indomethacin increased ACh-induced relaxation, reversing the anti-dilatory effect of PVATmedia. NOS inhibition reduced ACh-induced relaxation in uterine arteries from pregnant rats, and exposure to PVATmedia did not change this effect. Selective inhibition of COX-1 but not COX-2 suppressed relaxation responses to ACh in control arteries. The presence of PVATmedia abolished the effect of COX-1 inhibition. Incubation of uterine arteries from pregnant rats with PVATmedia increased production of thromboxane B2 (TxB2, p = 0.01) but thromboxane receptor (TP) inhibition did not affect the anti-dilatory properties of PVATmedia. In conclusion, inhibition of COX signaling suppressed the anti-dilatory effects of PVATmedia, while PVATmedia had no effect on the contribution of the NOS/NO pathway to ACh-induced relaxation in uterine arteries from pregnant rats, indicating that the anti-dilatory effects of uterine PVAT are mediated in part by COX-dependent mechanisms.
Collapse
Affiliation(s)
- Oluwatobiloba Osikoya
- Department of Physiology and Anatomy, University of North Texas Health Science Center at Fort Worth, TX, USA
| | - Spencer C Cushen
- Department of Physiology and Anatomy, University of North Texas Health Science Center at Fort Worth, TX, USA
| | - Contessa A Ricci
- Department of Physiology and Anatomy, University of North Texas Health Science Center at Fort Worth, TX, USA
| | - Styliani Goulopoulou
- Department of Physiology and Anatomy, University of North Texas Health Science Center at Fort Worth, TX, USA.
| |
Collapse
|
3
|
Chakraborti S, Pramanick A, Saha S, Sarkar S, Singh LP, Stewart A, Maity B. Biphasic changes in TGF-β1 signaling drive NSAID-induced multi-organ damage. Free Radic Biol Med 2020; 160:125-140. [PMID: 32750407 DOI: 10.1016/j.freeradbiomed.2020.06.026] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/13/2020] [Revised: 06/04/2020] [Accepted: 06/18/2020] [Indexed: 12/15/2022]
Abstract
The clinical utility of non-steroidal anti-inflammatory drugs (NSAIDs), used extensively worldwide, is limited by adverse cardiac events resulting from chronic drug exposure. Here, we provide evidence identifying transforming growth factor β (TGF-β1), released from multiple tissues, as a critical driver of NSAID-induced multi-organ damage. Biphasic changes in TGF-β1 levels in liver and heart were accompanied by ROS generation, cell death, fibrotic remodeling, compromised cardiac contractility and elevated liver enzymes. Pharmacological inhibition of TGF-βRI signaling markedly improved heart and liver function and increased overall survival of animals exposed to multiple NSAIDs, effects likely mediated by reductions in NOX-dependent ROS generation. Notably, the beneficial impact of TGF-βRI blockade was confined to a critical window wherein consecutive, but not concurrent, inhibitor administration improved cardiac and hepatic endpoints. Remarkably, in addition to ameliorating indomethacin-mediated myofilament disruptions, cardiac TGF-βRI knockdown lead to drastic reductions in TGF-β1 production accompanied by lessening in intestinal lesioning underscoring the importance of endocrine TGF-β1 signaling in NSAID-driven tissue injury. Indeed, gastric ulceration was associated with a higher incidence of cardiac complications in a human cohort underscoring the critical importance of circulation-facilitated peripheral organ system interconnectedness in efforts seeking to mitigate the toxic side effects of chronic NSAID use.
Collapse
Affiliation(s)
- Sreemoyee Chakraborti
- Centre of Biomedical Research, Sanjay Gandhi Post-Graduate Institute of Medical Sciences Campus, Raebareli Road, Lucknow, Uttar Pradesh, 226014, India
| | - Arnab Pramanick
- Centre of Biomedical Research, Sanjay Gandhi Post-Graduate Institute of Medical Sciences Campus, Raebareli Road, Lucknow, Uttar Pradesh, 226014, India
| | - Sudipta Saha
- Department of Pharmaceutical Sciences, Babasaheb Bhimrao Ambedkar University, Vidya Vihar, Raebareli Road, Lucknow, Uttar Pradesh, 226025, India
| | - Subhasish Sarkar
- Department of Surgery, College of Medicine and Sagore Dutta Hospital, B.T. Road, Kamarhati, Kolkata, West Bengal, 700058, India
| | | | - Adele Stewart
- Department of Biomedical Science, Charles E. Schmidt College of Medicine, Florida Atlantic University, Jupiter, FL, 33458, USA.
| | - Biswanath Maity
- Centre of Biomedical Research, Sanjay Gandhi Post-Graduate Institute of Medical Sciences Campus, Raebareli Road, Lucknow, Uttar Pradesh, 226014, India.
| |
Collapse
|
4
|
Haesen S, Cöl Ü, Schurgers W, Evens L, Verboven M, Driesen RB, Bronckaers A, Lambrichts I, Deluyker D, Bito V. Glycolaldehyde-modified proteins cause adverse functional and structural aortic remodeling leading to cardiac pressure overload. Sci Rep 2020; 10:12220. [PMID: 32699285 PMCID: PMC7376068 DOI: 10.1038/s41598-020-68974-4] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2019] [Accepted: 07/06/2020] [Indexed: 02/07/2023] Open
Abstract
Growing evidence supports the role of advanced glycation end products (AGEs) in the development of diabetic vascular complications and cardiovascular diseases (CVDs). We have shown that high-molecular-weight AGEs (HMW-AGEs), present in our Western diet, impair cardiac function. Whether HMW-AGEs affect vascular function remains unknown. In this study, we aimed to investigate the impact of chronic HMW-AGEs exposure on vascular function and structure. Adult male Sprague Dawley rats were daily injected with HMW-AGEs or control solution for 6 weeks. HMW-AGEs animals showed intracardiac pressure overload, characterized by increased systolic and mean pressures. The contraction response to PE was increased in aortic rings from the HMW-AGEs group. Relaxation in response to ACh, but not SNP, was impaired by HMW-AGEs. This was associated with reduced plasma cyclic GMP levels. SOD restored ACh-induced relaxation of HMW-AGEs animals to control levels, accompanied by a reduced half-maximal effective dose (EC50). Finally, collagen deposition and intima-media thickness of the aortic vessel wall were increased with HMW-AGEs. Our data demonstrate that chronic HMW-AGEs exposure causes adverse vascular remodelling. This is characterised by disturbed vasomotor function due to increased oxidative stress and structural changes in the aorta, suggesting an important contribution of HMW-AGEs in the development of CVDs.
Collapse
Affiliation(s)
- Sibren Haesen
- Biomedical Research Institute (BIOMED), Hasselt University, Martelarenlaan 42, 3500, Hasselt, Belgium
| | - Ümare Cöl
- Biomedical Research Institute (BIOMED), Hasselt University, Martelarenlaan 42, 3500, Hasselt, Belgium
| | - Wouter Schurgers
- Biomedical Research Institute (BIOMED), Hasselt University, Martelarenlaan 42, 3500, Hasselt, Belgium
| | - Lize Evens
- Biomedical Research Institute (BIOMED), Hasselt University, Martelarenlaan 42, 3500, Hasselt, Belgium
| | - Maxim Verboven
- Biomedical Research Institute (BIOMED), Hasselt University, Martelarenlaan 42, 3500, Hasselt, Belgium
| | - Ronald B Driesen
- Biomedical Research Institute (BIOMED), Hasselt University, Martelarenlaan 42, 3500, Hasselt, Belgium
| | - Annelies Bronckaers
- Biomedical Research Institute (BIOMED), Hasselt University, Martelarenlaan 42, 3500, Hasselt, Belgium
| | - Ivo Lambrichts
- Biomedical Research Institute (BIOMED), Hasselt University, Martelarenlaan 42, 3500, Hasselt, Belgium
| | - Dorien Deluyker
- Biomedical Research Institute (BIOMED), Hasselt University, Martelarenlaan 42, 3500, Hasselt, Belgium
| | - Virginie Bito
- Biomedical Research Institute (BIOMED), Hasselt University, Martelarenlaan 42, 3500, Hasselt, Belgium.
| |
Collapse
|
5
|
Tropea T, Renshall LJ, Nihlen C, Weitzberg E, Lundberg JO, David AL, Tsatsaris V, Stuckey DJ, Wareing M, Greenwood SL, Sibley CP, Cottrell EC. Beetroot juice lowers blood pressure and improves endothelial function in pregnant eNOS -/- mice: importance of nitrate-independent effects. J Physiol 2020; 598:4079-4092. [PMID: 32368787 DOI: 10.1113/jp279655] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2020] [Accepted: 04/27/2020] [Indexed: 12/18/2022] Open
Abstract
KEY POINTS Maternal hypertension is associated with increased rates of pregnancy pathologies, including fetal growth restriction, due at least in part to reductions in nitric oxide (NO) bioavailability and associated vascular dysfunction. Dietary nitrate supplementation, from beetroot juice (BRJ), has been shown to increase NO bioavailability and improve cardiovascular function in both preclinical and clinical studies. This study is the first to investigate effects of dietary nitrate supplementation in a pregnant animal model. Importantly, the effects of nitrate-containing BRJ were compared with both 'placebo' (nitrate-depleted) BRJ as well as water to control for potential nitrate-independent effects. Our data show novel, nitrate-independent effects of BRJ to lower blood pressure and improve vascular function in endothelial nitric oxide synthase knockout (eNOS-/- ) mice. These findings suggest potential beneficial effects of BRJ supplementation in pregnancy, and emphasize the importance of accounting for nitrate-independent effects of BRJ in study design and interpretation. ABSTRACT Maternal hypertension is associated with adverse pregnancy outcomes, including fetal growth restriction (FGR), due in part to reductions in nitric oxide (NO) bioavailability. We hypothesized that maternal dietary nitrate administration would increase NO bioavailability to reduce systolic blood pressure (SBP), improve vascular function and increase fetal growth in pregnant endothelial NO synthase knockout (eNOS-/- ) mice, which exhibit hypertension, endothelial dysfunction and FGR. Pregnant wildtype (WT) and eNOS-/- mice were supplemented with nitrate-containing beetroot juice (BRJ+) from gestational day (GD) 12.5. Control mice received an equivalent dose of nitrate-depleted BRJ (BRJ-) or normal drinking water. At GD17.5, maternal SBP was measured; at GD18.5, maternal nitrate/nitrite concentrations, uterine artery (UtA) blood flow and endothelial function were assessed, and pregnancy outcomes were determined. Plasma nitrate concentrations were increased in both WT and eNOS-/- mice supplemented with BRJ+ (P < 0.001), whereas nitrite concentrations were increased only in eNOS-/- mice (P < 0.001). BRJ- did not alter nitrate/nitrite concentrations. SBP was lowered and UtA endothelial function was enhanced in eNOS-/- mice supplemented with either BRJ+ or BRJ-, indicating nitrate-independent effects of BRJ. Improvements in endothelial function in eNOS-/- mice were abrogated in the presence of 25 mm KCl, implicating enhanced EDH signalling in BRJ- treated animals. At GD18.5, eNOS-/- fetuses were significantly smaller than WT animals (P < 0.001), but BRJ supplementation did not affect fetal weight. BRJ may be a beneficial intervention in pregnancies associated with hypertension, endothelial dysfunction and reduced NO bioavailability. Our data showing biological effects of non-nitrate components of BRJ have implications for both interpretation of previous findings and in the design of future clinical trials.
Collapse
Affiliation(s)
- Teresa Tropea
- Maternal and Fetal Health Research Centre, Division of Developmental Biology and Medicine, Faculty of Biology, Medicine and Health, University of Manchester, Manchester, UK.,Manchester Academic Health Science Centre, Manchester University NHS Foundation Trust, St. Mary's Hospital, Manchester, UK
| | - Lewis J Renshall
- Maternal and Fetal Health Research Centre, Division of Developmental Biology and Medicine, Faculty of Biology, Medicine and Health, University of Manchester, Manchester, UK.,Manchester Academic Health Science Centre, Manchester University NHS Foundation Trust, St. Mary's Hospital, Manchester, UK
| | - Carina Nihlen
- Department of Physiology and Pharmacology, Karolinska Institute, Stockholm, SE-171 77, Sweden
| | - Eddie Weitzberg
- Department of Physiology and Pharmacology, Karolinska Institute, Stockholm, SE-171 77, Sweden
| | - Jon O Lundberg
- Department of Physiology and Pharmacology, Karolinska Institute, Stockholm, SE-171 77, Sweden
| | - Anna L David
- Elizabeth Garrett Anderson Institute for Women's Health, University College London, London, UK
| | - Vassilis Tsatsaris
- Obstetrics and Gynecology Unit, Maternité Port-Royal, APHP, Paris V, Paris, France
| | - Daniel J Stuckey
- Centre for Advanced Biomedical Imaging, University College London, London, UK
| | - Mark Wareing
- Maternal and Fetal Health Research Centre, Division of Developmental Biology and Medicine, Faculty of Biology, Medicine and Health, University of Manchester, Manchester, UK.,Manchester Academic Health Science Centre, Manchester University NHS Foundation Trust, St. Mary's Hospital, Manchester, UK
| | - Susan L Greenwood
- Maternal and Fetal Health Research Centre, Division of Developmental Biology and Medicine, Faculty of Biology, Medicine and Health, University of Manchester, Manchester, UK.,Manchester Academic Health Science Centre, Manchester University NHS Foundation Trust, St. Mary's Hospital, Manchester, UK
| | - Colin P Sibley
- Maternal and Fetal Health Research Centre, Division of Developmental Biology and Medicine, Faculty of Biology, Medicine and Health, University of Manchester, Manchester, UK.,Manchester Academic Health Science Centre, Manchester University NHS Foundation Trust, St. Mary's Hospital, Manchester, UK
| | - Elizabeth C Cottrell
- Maternal and Fetal Health Research Centre, Division of Developmental Biology and Medicine, Faculty of Biology, Medicine and Health, University of Manchester, Manchester, UK.,Manchester Academic Health Science Centre, Manchester University NHS Foundation Trust, St. Mary's Hospital, Manchester, UK
| |
Collapse
|
6
|
Peng X, Zeng Y, Liu H, Xu X, Zhang M, Liu Q. From indoles to 3,3′-biindolin-2-ones: copper-catalyzed oxidative homocoupling of indoles. NEW J CHEM 2019. [DOI: 10.1039/c9nj03620b] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
A copper-catalyzed intermolecular oxidative homocoupling of indoles for the direct construction of valuable C3–C3 biindolyl scaffolds.
Collapse
Affiliation(s)
- Xiangjun Peng
- School of Pharmaceutical Science
- Gannan Medical University
- Ganzhou
- P. R. China
- Key Laboratory for the Chemistry and Molecular Engineering of Medicinal Resources (Ministry of Education of China)
| | - Yong Zeng
- School of Pharmaceutical Science
- Gannan Medical University
- Ganzhou
- P. R. China
- Clinical Research Center for Children's Vascular Abnormal Diseases in Jiangxi Province
| | - Hai Liu
- School of Pharmaceutical Science
- Gannan Medical University
- Ganzhou
- P. R. China
| | - Xianyun Xu
- School of Pharmaceutical Science
- Gannan Medical University
- Ganzhou
- P. R. China
| | - Minhong Zhang
- Clinical Research Center for Children's Vascular Abnormal Diseases in Jiangxi Province
- Key Laboratory for Cardiovascular and Cerebrovascular Diseases of the Ministry of Education
- Ganzhou
- P. R. China
| | - Qian Liu
- School of Pharmaceutical Science
- Gannan Medical University
- Ganzhou
- P. R. China
- Clinical Research Center for Children's Vascular Abnormal Diseases in Jiangxi Province
| |
Collapse
|
7
|
Endothelium-derived contraction in a model of rheumatoid arthritis is mediated via angiotensin II type 1 receptors. Vascul Pharmacol 2018; 100:51-57. [DOI: 10.1016/j.vph.2017.11.001] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2017] [Revised: 11/02/2017] [Accepted: 11/04/2017] [Indexed: 01/16/2023]
|
8
|
Cappetta D, Esposito G, Coppini R, Piegari E, Russo R, Ciuffreda LP, Rivellino A, Santini L, Rafaniello C, Scavone C, Rossi F, Berrino L, Urbanek K, De Angelis A. Effects of ranolazine in a model of doxorubicin-induced left ventricle diastolic dysfunction. Br J Pharmacol 2017; 174:3696-3712. [PMID: 28320043 DOI: 10.1111/bph.13791] [Citation(s) in RCA: 62] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2016] [Revised: 03/07/2017] [Accepted: 03/09/2017] [Indexed: 12/19/2022] Open
Abstract
BACKGROUND AND PURPOSE Doxorubicin is a highly effective anticancer drug, but its clinical application is hampered by cardiotoxicity. Asymptomatic diastolic dysfunction can be the earliest manifestation of doxorubicin cardiotoxicity. Therefore, a search for therapeutic intervention that can interfere with early manifestations and possibly prevent later development of cardiotoxicity is warranted. Increased doxorubicin-dependent ROS may explain, in part, Ca2+ and Na+ overload that contributes to diastolic dysfunction and development of heart failure. Therefore, we tested whether the administration of ranolazine, a selective blocker of late Na+ current, immediately after completing doxorubicin therapy, could affect diastolic dysfunction and interfere with the progression of functional decline. EXPERIMENTAL APPROACH Fischer 344 rats received a cumulative dose of doxorubicin of 15 mg·kg-1 over a period of 2 weeks. After the assessment of diastolic dysfunction, the animals were treated with ranolazine (80 mg·kg-1 , daily) for the following 4 weeks. KEY RESULTS While diastolic and systolic function progressively deteriorated in doxorubicin-treated animals, treatment with ranolazine relieved diastolic dysfunction and prevented worsening of systolic function, decreasing mortality. Ranolazine lowered myocardial NADPH oxidase 2 expression and oxidative/nitrative stress. Expression of the Na+ /Ca2+ exchanger 1 and Nav 1.5 channels was reduced and of the sarcoplasmic/endoplasmic reticulum Ca2+ -ATPase 2 protein was increased. In addition, ranolazine lowered doxorubicin-induced hyper-phosphorylation and oxidation of Ca2+ /calmodulin-dependent protein kinase II, and decreased myocardial fibrosis. CONCLUSIONS AND IMPLICATIONS Ranolazine, by the increased Na+ influx, induced by doxorubicin, altered cardiac Ca2+ and Na+ handling and attenuated diastolic dysfunction induced by doxorubicin, thus preventing the progression of cardiomyopathy. LINKED ARTICLES This article is part of a themed section on New Insights into Cardiotoxicity Caused by Chemotherapeutic Agents. To view the other articles in this section visit http://onlinelibrary.wiley.com/doi/10.1111/bph.v174.21/issuetoc.
Collapse
Affiliation(s)
- Donato Cappetta
- Department of Experimental Medicine, Division of Pharmacology, University of Campania "Luigi Vanvitelli", Naples, Italy
| | - Grazia Esposito
- Department of Experimental Medicine, Division of Pharmacology, University of Campania "Luigi Vanvitelli", Naples, Italy
| | - Raffaele Coppini
- Department of Neuroscience, Drug Research and Child's Health (NeuroFarBa), Division of Pharmacology, University of Florence, Florence, Italy
| | - Elena Piegari
- Department of Experimental Medicine, Division of Pharmacology, University of Campania "Luigi Vanvitelli", Naples, Italy
| | - Rosa Russo
- Department of Experimental Medicine, Division of Pharmacology, University of Campania "Luigi Vanvitelli", Naples, Italy
| | - Loreta Pia Ciuffreda
- Department of Experimental Medicine, Division of Pharmacology, University of Campania "Luigi Vanvitelli", Naples, Italy
| | - Alessia Rivellino
- Department of Experimental Medicine, Division of Pharmacology, University of Campania "Luigi Vanvitelli", Naples, Italy
| | - Lorenzo Santini
- Department of Neuroscience, Drug Research and Child's Health (NeuroFarBa), Division of Pharmacology, University of Florence, Florence, Italy
| | - Concetta Rafaniello
- Department of Experimental Medicine, Division of Pharmacology, University of Campania "Luigi Vanvitelli", Naples, Italy
| | - Cristina Scavone
- Department of Experimental Medicine, Division of Pharmacology, University of Campania "Luigi Vanvitelli", Naples, Italy
| | - Francesco Rossi
- Department of Experimental Medicine, Division of Pharmacology, University of Campania "Luigi Vanvitelli", Naples, Italy
| | - Liberato Berrino
- Department of Experimental Medicine, Division of Pharmacology, University of Campania "Luigi Vanvitelli", Naples, Italy
| | - Konrad Urbanek
- Department of Experimental Medicine, Division of Pharmacology, University of Campania "Luigi Vanvitelli", Naples, Italy
| | - Antonella De Angelis
- Department of Experimental Medicine, Division of Pharmacology, University of Campania "Luigi Vanvitelli", Naples, Italy
| |
Collapse
|
9
|
Mota MM, Mesquita TRR, Silva TLTBD, Fontes MT, Lauton Santos S, Capettini LDSA, Jesus ICGD, Quintans Júnior LJ, De Angelis K, Wichi RB, Santos MRV. Endothelium adjustments to acute resistance exercise are intensity-dependent in healthy animals. Life Sci 2015; 142:86-91. [DOI: 10.1016/j.lfs.2015.10.007] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2015] [Revised: 09/15/2015] [Accepted: 10/06/2015] [Indexed: 10/22/2022]
|
10
|
Paredes-Gamero EJ, Medeiros VP, Farias EHC, Justo GZ, Trindade ES, Andrade-Lopes AL, Godinho RO, de Miranda A, Ferreira AT, Tersariol ILS, Nader HB. Heparin induces rat aorta relaxation via integrin-dependent activation of muscarinic M3 receptors. Hypertension 2010; 56:713-21. [PMID: 20805441 DOI: 10.1161/hypertensionaha.110.156877] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
Previous reports have shown that heparin may promote human hypotension and vascular relaxation by elevation of NO levels through unclear mechanisms. We hypothesized that endothelial muscarinic M(3) receptor activation mediates the heparin-induced vasodilation of rat aortic rings. The experiments were carried out using unfractionated heparin extracted from bovine intestinal mucosa, which elicited an endothelium and NO-dependent relaxation of aortic segments with maximal potency and efficacy (EC(50): 100±10 μmol/L; E(max): 41±3%). Atropine and 1,1-dimethyl-4-diphenylacetoxypiperidinium iodide inhibitors reduced the heparin-dependent relaxation, indicating that M(3) muscarinic receptor is involved in this phenomenon. However, no direct binding of heparin to muscarinic receptors was observed. More importantly, studies performed using the arginine-glycine-aspartic acid peptide and 1-(1,1-dimethylethyl)-3-(1-naphthalenyl)-1H-pyrazolo[3,4-day]pyrimidin-4-amine, an Src family inhibitor, reduced by 51% and 73% the heparin-dependent relaxation, respectively, suggesting the coupling of heparin and M(3) receptor through extracellular matrix molecules and integrin. Furthermore, unfractionated heparin induced activation of focal adhesion protein kinase, Src, and paxillin. Finally, fluorescence resonance energy transfer approach confirmed the interaction of the M(3) receptor to integrin. Taken together, these data demonstrate the participation of M(3) receptor and integrin in heparin-dependent relaxation of vascular smooth muscle. These results provide new insights into the molecular mechanism and potential pharmacological action of heparin in vascular physiology.
Collapse
|
11
|
Zielonka J, Kalyanaraman B. Hydroethidine- and MitoSOX-derived red fluorescence is not a reliable indicator of intracellular superoxide formation: another inconvenient truth. Free Radic Biol Med 2010; 48:983-1001. [PMID: 20116425 PMCID: PMC3587154 DOI: 10.1016/j.freeradbiomed.2010.01.028] [Citation(s) in RCA: 393] [Impact Index Per Article: 28.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/12/2009] [Revised: 01/20/2010] [Accepted: 01/21/2010] [Indexed: 12/15/2022]
Abstract
Hydroethidine (HE; or dihydroethidium) is the most popular fluorogenic probe used for detecting intracellular superoxide radical anion. The reaction between superoxide and HE generates a highly specific red fluorescent product, 2-hydroxyethidium (2-OH-E(+)). In biological systems, another red fluorescent product, ethidium, is also formed, usually at a much higher concentration than 2-OH-E(+). In this article, we review the methods to selectively detect the superoxide-specific product (2-OH-E(+)) and the factors affecting its levels in cellular and biological systems. The most important conclusion of this review is that it is nearly impossible to assess the intracellular levels of the superoxide-specific product, 2-OH-E(+), using confocal microscopy or other fluorescence-based microscopic assays and that it is essential to measure by HPLC the intracellular HE and other oxidation products of HE, in addition to 2-OH-E(+), to fully understand the origin of red fluorescence. The chemical reactivity of mitochondria-targeted hydroethidine (Mito-HE, MitoSOX red) with superoxide is similar to the reactivity of HE with superoxide, and therefore, all of the limitations attributed to the HE assay are applicable to Mito-HE (or MitoSOX) as well.
Collapse
Affiliation(s)
- Jacek Zielonka
- Department of Biophysics and Free Radical Research Center, Medical College of Wisconsin, Milwaukee, WI 53226, USA.
| | | |
Collapse
|
12
|
Galpha13 regulates methacholine-induced contraction of bronchial smooth muscle via phosphorylation of MLC20. Biochem Pharmacol 2009; 77:1497-505. [PMID: 19426687 DOI: 10.1016/j.bcp.2009.01.016] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2008] [Revised: 01/22/2009] [Accepted: 01/26/2009] [Indexed: 11/23/2022]
Abstract
Reversible airway constriction is induced by an increase in airway smooth muscle contractility in response to methacholine likely as a bronchospastic stimulus. Despite the finding of Galpha12 and Galpha13 up-regulation in airway hyperresponsive animals, their functional role of contraction in airway smooth muscle has not been directly explored. This study investigated the differential regulatory role of Galpha12/Galpha13 in methacholine-induced contraction of trachea and bronchus in Galpha12 or Galpha13 gene knockout mice after ovalbumin sensitization and challenges. Organ bath assays and videomicroscopy revealed that Galpha13 deficiency delayed methacholine-induced contractile response of bronchiolar smooth muscle, but not that of tracheal smooth muscle. In primary bronchial smooth muscle cells, knockdown of Galpha13 blocked methacholine-induced phosphorylation of 20 kDa regulatory light chain of myosin II (MLC20), a prerequisite step for the contractile initiation of actin and myosin. Galpha13-dependent MLC20 phosphorylation was confirmed in murine embryonic fibroblasts. After ovalbumin sensitization and challenges, wild type mice exhibited methacholine-induced bronchial contraction of lung tissue. Heterozygous absence of the Galpha13 gene abrogated methacholine-induced contractions, whereas homozygous absence of the Galpha12 gene failed to do so. Our findings indicate that Galpha13, but not Galpha12, specifically regulates cholinergic bronchial contraction in airway responsiveness via controlling phosphorylation of MLC20 by methacholine.
Collapse
|
13
|
Konan AB, Datté JY, Yapo PA. Nitric oxide pathway-mediated relaxant effect of aqueous sesame leaves extract (Sesamum radiatum Schum. & Thonn.) in the guinea-pig isolated aorta smooth muscle. BMC COMPLEMENTARY AND ALTERNATIVE MEDICINE 2008; 8:23. [PMID: 18505582 PMCID: PMC2426668 DOI: 10.1186/1472-6882-8-23] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/05/2008] [Accepted: 05/27/2008] [Indexed: 11/25/2022]
Abstract
Background Sesamum radiatum Schum. & Thonn. (Pedaliaceae) is an annual herbaceous plant, which belongs to the family Pedaliaceae and genus Sesamum. Sesame is used in traditional medicine in Africa and Asia for many diseases treatment. Sesame plant especially the leaves, seed and oil are consumed locally as a staple food by subsistence farmers. The study analyses the relaxation induced by the aqueous extract of leaves from sesame (ESera), compared with those of acetylcholine (ACh) in the guinea-pig aortic preparations (GPAPs), in order to confirm the use in traditional medicine for cardiovascular diseases. Methods The longitudinal strips of aorta of animals were rapidly removed from animals. The aorta was immediately placed in a Mac Ewen solution. Experiments were performed in preparations with intact endothelium as well as in aortae where the endothelium had been removed. The preparations were suspended between two L-shaped stainless steel hooks in a 10 ml organ bath with Mac Ewen solution. The isometric contractile force of the aorta strips of guinea-pig were recorded by using a strain gauge. All both drugs caused concentration-dependent relaxations responses. Results The aqueous extract of leaves from sesame ESera (1 × 10-7 – 0.1 μg/ml) caused a graded relaxation in GPAPs with intact endothelium, with a EC50-value of 1 × 10-4 μg/ml. The same effect was observed with ACh (7 × 10-2 nM – 7 × 10-1 μM), which caused relaxation in a concentration-dependent manner. The relaxation in response to ESera and, like that to ACh in GPAPs without endothelium, was fully abolished. Destruction of the endothelium or incubation with the nitric oxyde synthase inhibitor (L-NNA) significantly enhanced the inhibition of the relaxation response to ESera. Moreover, all concentrations induced vasoconstrictions. However, L-NNA produced a significant displacement to the right (about 65-fold) of the relaxation response to ESera. Similar results were obtained with ACh. Both diclofenac and tetra-ethyl-ammonium (TEA) pretreatment of GPAPs induced a suppression of the relaxation caused by ESera, and produced a very significant rightward shifts of the CRC (16-fold) for diclofenac and increase the Emax. In contract, the relaxation caused by ACh was not significantly affected by diclofenac or by TEA. Conclusion Thus, the present results indicate clearly that the nitric oxide largely contribute to the relaxation effect of Esera and of ACh in GPAPs. In addition, their contractile effects are also mediated by cyclooxygenase activation, and probably the K+ channels involvement, that confirm the use of various preparations of Esera for the treatments of cardiovascular diseases.
Collapse
|
14
|
Serebruany VL, Malinin AI, Bhatt DL. Paradoxical rebound platelet activation after painkillers cessation: missing risk for vascular events? Am J Med 2006; 119:707.e11-6. [PMID: 16887419 DOI: 10.1016/j.amjmed.2005.11.007] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/19/2005] [Revised: 11/03/2005] [Accepted: 11/03/2005] [Indexed: 11/21/2022]
Abstract
BACKGROUND Several reliable reports strongly indicate that the use of nonsteroidal anti-inflammatory drugs (NSAIDs) and cyclooxygenase-2 (COX-2) inhibitors is associated with an increased risk of cardiovascular events. Considering the key role of platelets in coronary atherosclerosis and the fact that antiplatelet therapy with aspirin (and more recently, clopidogrel) has been associated with reduced vascular mortality, we sought to determine the effect of therapy and withdrawal of NSAIDs and COX-2 inhibitors on platelet activity. METHODS Platelet characteristics from 34 aspirin-naive volunteers who were receiving NSAIDs and COX-2 inhibitors were compared with 138 drug-free controls. Platelets were assessed twice at baseline (at least 1 month of NSAIDs and COX-2 inhibitors) and after a 14-day washout. We used adenosine diphosphate-induced conventional aggregometry, the point-of-care Ultegra analyzer (Ultegra Accumetrics, San Diego, Calif), and whole blood flow cytometry. RESULTS Platelet activity during therapy with NSAIDs and COX-2 inhibitors was similar and unremarkable between groups. However, there was a highly significant increase of platelet activity as assessed by conventional aggregometry (P=.0003), Ultegra analyzer readings (P=.03), and expression of GPIIb/IIIa (P=.02), P-selectin (P=.03), and platelet endothelial cell adhesion molecule-1 (P=.001) after withdrawal from NSAIDs and COX-2 inhibitors. CONCLUSIONS These data suggest that drug cessation, rather than continuous therapy with NSAIDs and COX-2 inhibitors, may be associated with rebound platelet activation, which may predispose one to a higher risk of vascular events. This hypothesis requires intensive testing in crossover randomized studies and may justify more aggressive antiplatelet regimens in patients after discontinuation of therapy with NSAIDs and COX-2 inhibitors.
Collapse
|
15
|
Vizioli EO, Spadin MD, Corrêa FMA, Viaro F, Evora PRB, Chies AB. Acetylcholine-induced aortic relaxation studied in salbutamol treated rats. J Smooth Muscle Res 2006; 41:271-81. [PMID: 16428866 DOI: 10.1540/jsmr.41.271] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
It has been proposed that the acetylcholine (ACh)-induced relaxation of the rat aorta is entirely mediated by endothelium derived-nitric oxide (NO). However, some authors have reported that indomethacin pretreatment attenuates ACh-induced relaxation of rat aortic ring preparations. Moreover, it has also been suggested that cAMP accumulation may regulate either nitric oxide synthase (NOS) or cyclooxygenase (COX) expression in different tissues. Thus, in this in vitro study we have investigated the endothelial mechanisms involved in the ACh-induced relaxation of ring preparations of the rat thoracic aorta, as well as the influence chronic treatment with the selective beta(2)-agonist salbutamol had upon such mechanisms. Results of functional experiments show that N(G)-monomethyl-L-arginine (L-NMMA, 3 x 10(-4) M) considerably inhibited the ACh-induced relaxation of rat aortic ring preparations. However, indomethacin (10(-5) M) was also found to partially attenuate this ACh response, suggesting that although NO is the most important mediator of the ACh-induced relaxation of the rat aortic ring preparations, vasorelaxation may also involve prostanoids. Moreover, the results suggest that treatment with salbutamol failed to produce any change in the ACh-induced relaxation of rat aortic ring preparations.
Collapse
MESH Headings
- Acetylcholine/pharmacology
- Adrenergic beta-Agonists/pharmacology
- Albuterol/pharmacology
- Animals
- Aorta, Thoracic/drug effects
- Aorta, Thoracic/physiology
- Cyclic AMP/analysis
- Cyclic AMP/physiology
- Dose-Response Relationship, Drug
- Endothelium, Vascular/chemistry
- Endothelium, Vascular/physiology
- Indomethacin/pharmacology
- Male
- Muscle Relaxation/drug effects
- Muscle Relaxation/physiology
- Muscle, Smooth, Vascular/chemistry
- Muscle, Smooth, Vascular/physiology
- Nitric Oxide/physiology
- Nitric Oxide Synthase/physiology
- Prostaglandins/physiology
- Rats
- Rats, Wistar
- omega-N-Methylarginine/pharmacology
Collapse
Affiliation(s)
- Ednir O Vizioli
- Laboratory of Pharmacology, School of Medicine of Marília, SP, Brazil
| | | | | | | | | | | |
Collapse
|
16
|
Kang JJ, Lee PJ, Chen YJ, Lee CC, Li CH, Cheng HW, Cheng YW. Naphthazarin and methylnaphthazarin cause vascular dysfunction by impairment of endothelium-derived nitric oxide and increased superoxide anion generation. Toxicol In Vitro 2006; 20:43-51. [PMID: 16019186 DOI: 10.1016/j.tiv.2005.05.006] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2004] [Revised: 05/13/2005] [Accepted: 05/27/2005] [Indexed: 11/22/2022]
Abstract
The effects of the naphthoquinone analogue, naphthazarin (Nap), and its derivative, methylnaphthazarin (MetNap), on vascular reactivity were studied using isolated rat aortic rings and human umbilical vein endothelial cells (HUVECs). In this study, we determined vessel tension, nitric oxide (NO) formation, endothelial nitric oxide synthase (eNOS) activity, eNOS protein expression, and superoxide anion (O2*-) generation in an effort to evaluate the effect of Nap and MetNap on the impairment of the NO-mediated pathway. Lower concentrations of Nap (0.01-1 microM) and MetNap (1-10 microM) concentration-dependently enhanced phenylephrine (PE)-induced vasocontraction and abrogated acetylcholine (ACh)-induced vasorelaxation in an endothelium-dependent manner. On HUVECs, both Nap and MetNap concentration-dependently inhibited NO formation induced by A23187, and also partially inhibited nitric oxide synthase (NOS) activity. eNOS protein expression by HUVECs was not affected by treatment with Nap or MetNap, even within 24h. These data suggest that Nap and MetNap might act as inhibitors of nitric oxide synthesis in the endothelium. In addition, Nap and MetNap were also shown to generate O2*- on HUVECs with short-term treatment. We concluded that Nap and MetNap inhibited agonist-induced relaxation and induced vasocontraction in an endothelium-dependent manner, and these effects might have been due to modification of the NO content by inhibition of NOS activity and bioinactivation through O2*- generation.
Collapse
Affiliation(s)
- Jaw-Jou Kang
- Institute of Toxicology, College of Medicine, National Taiwan University, Taipei, Taiwan
| | | | | | | | | | | | | |
Collapse
|
17
|
Georgiou CD, Papapostolou I, Patsoukis N, Tsegenidis T, Sideris T. An ultrasensitive fluorescent assay for the in vivo quantification of superoxide radical in organisms. Anal Biochem 2005; 347:144-51. [PMID: 16246291 DOI: 10.1016/j.ab.2005.09.013] [Citation(s) in RCA: 61] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2005] [Revised: 09/10/2005] [Accepted: 09/13/2005] [Indexed: 11/22/2022]
Abstract
Superoxide radical is a very important parameter of oxidative stress involved in a variety of biological phenomena; therefore, its in vivo study is of utmost significance. However, its accurate detection is a challenge due to its short lifetime and its very low physiological concentration. All current assays are qualitative and nonspecific, and at best they are performed in vitro. The current dihydroethidine-based assay overcomes all these problems and introduces the following novelties. First, it measures the in vivo superoxide production in animals, plants, and microorganisms. Second, it is ultrasensitive and very simple in that it can measure superoxide radical as low as 1.5 pmol in biological samples as low as 5 mg. Third, the very high sensitivity of the assay renders possible, for the first time, the measurement of the actual rate of formation of superoxide radical under physiological and simulated nonphysiological conditions.
Collapse
Affiliation(s)
- Christos D Georgiou
- Department of Biology, Section of Genetics, Cell Biology, and Development, University of Patras, Greece.
| | | | | | | | | |
Collapse
|