1
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Lozahic C, Maddock H, Wheatley M, Sandhu H. Doxorubicin alters G-protein coupled receptor-mediated vasocontraction in rat coronary arteries. NAUNYN-SCHMIEDEBERG'S ARCHIVES OF PHARMACOLOGY 2024; 397:5831-5845. [PMID: 38326659 DOI: 10.1007/s00210-024-02988-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/04/2023] [Accepted: 01/29/2024] [Indexed: 02/09/2024]
Abstract
Doxorubicin (Doxo)-associated cardio-and vasotoxicity has been recognised as a serious complication of cancer chemotherapy. The purpose of this novel paper was to determine the effect of Doxo on G-protein coupled receptor (GPCR)-mediated vasocontraction located on vascular smooth muscle cells. Rat left anterior descending artery segments were incubated for 24 h with 0.5 µM Doxo. The vasocontractile responses by activation of endothelin receptor type A (ETA) and type B (ETB), serotonin receptor 1B (5-HT1B) and thromboxane A2 prostanoid receptor (TP) were investigated by a sensitive myography using specific agonists, while the specificity of the GPCR agonists was verified by applying selective antagonists (i.e. ETA and ETB agonist = 10- 14-10- 7.5 M endothelin-1 (ET-1); ETA antagonist = 10 µM BQ123; ETB agonists = 10- 14-10- 7.5 M sarafotoxin 6c (S6c) and ET-1; ETB antagonist = 0.1 µM BQ788; 5-HT1B agonist = 10- 12-10- 5.5 M 5-carboxamidotryptamine (5-CT); 5-HT1B antagonist = 1 µM GR55562; TP agonist = 10- 12-10- 6.5 M U46619; TP antagonist = 1 µM Seratrodast). Our results show that 0.5 µM Doxo incubation of LAD segments leads to an increased VSMC vasocontraction through the ETB, 5-HT1B and TP GPCRs, with a 2.2-fold increase in ETB-mediated vasocontraction at 10- 10.5 M S6c, a 2.0-fold increase in 5-HT1B-mediated vasocontraction at 10- 5.5 M 5-CT, and a 1.3-fold increase in TP-mediated vasocontraction at 10- 6.5 M U46619. Further studies unravelling the involvement of intracellular GPCR signalling pathways will broaden our understanding of the Doxo-induced vasotoxicity, and thus pave the way to mitigate the adverse effects by potential implementation of adjunct therapy options.
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MESH Headings
- Animals
- Male
- Doxorubicin/pharmacology
- Coronary Vessels/drug effects
- Coronary Vessels/metabolism
- Vasoconstriction/drug effects
- Antibiotics, Antineoplastic/pharmacology
- Antibiotics, Antineoplastic/toxicity
- Receptors, G-Protein-Coupled/metabolism
- Receptors, G-Protein-Coupled/agonists
- Receptors, G-Protein-Coupled/antagonists & inhibitors
- Rats, Wistar
- Muscle, Smooth, Vascular/drug effects
- Muscle, Smooth, Vascular/metabolism
- Receptors, Thromboxane A2, Prostaglandin H2/antagonists & inhibitors
- Receptors, Thromboxane A2, Prostaglandin H2/metabolism
- Receptors, Thromboxane A2, Prostaglandin H2/agonists
- Receptor, Serotonin, 5-HT1B/metabolism
- Rats
- Receptor, Endothelin B/metabolism
- Receptor, Endothelin B/agonists
- Receptor, Endothelin B/drug effects
- In Vitro Techniques
- Receptor, Endothelin A/metabolism
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Affiliation(s)
- Caroline Lozahic
- Research Centre for Health & Life Sciences, Coventry University, Alison Gingell Building, Priory Street, Coventry, CV1 5FB, UK
| | - Helen Maddock
- Research Centre for Health & Life Sciences, Coventry University, Alison Gingell Building, Priory Street, Coventry, CV1 5FB, UK
| | - Mark Wheatley
- Research Centre for Health & Life Sciences, Coventry University, Alison Gingell Building, Priory Street, Coventry, CV1 5FB, UK
| | - Hardip Sandhu
- Research Centre for Health & Life Sciences, Coventry University, Alison Gingell Building, Priory Street, Coventry, CV1 5FB, UK.
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2
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Bordy R, Moretto J, Devaux S, Wendling D, Moretto-Riedweg K, Demougeot C, Totoson P. Adjuvant-induced arthritis is a relevant model to mimic coronary and myocardial impairments in rheumatoid arthritis. Joint Bone Spine 2020; 88:105069. [PMID: 32920169 DOI: 10.1016/j.jbspin.2020.09.001] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2020] [Accepted: 09/01/2020] [Indexed: 12/16/2022]
Abstract
OBJECTIVES To determine if the adjuvant-induced arthritis model reproduced coronary and cardiac impairments observed in rheumatoid arthritis patients. The link between disease activity and circulating levels of angiotensin II and endothelin-1 have been studied, as well as the myocardial susceptibility to ischemia. METHODS At the acute inflammatory phase, coronary reactivity was assessed in isolated arteries, and cardiac function was studied in isolated perfused hearts, before and after global ischemia/reperfusion. Ischemic insult was evaluated by the infarct size, lactate dehydrogenase and creatine phosphokinase levels in coronary effluents. Cardiac myeloperoxidase activity was measured, as well as angiotensin II and endothelin-1 levels. RESULTS Compared to controls, adjuvant-induced arthritis had reduced coronary Acetylcholine-induced relaxation associated with cardiac hypertrophy, both being correlated with plasma levels of endothelin-1 and angiotensin II, and arthritis score. Although cardiac function at baseline was similar from controls, adjuvant-induced arthritis rats exhibited lower cardiac functional recovery, increased myeloperoxidase activity, higher infarct size and creatine phosphokinase levels after ischemia/reperfusion. CONCLUSIONS The adjuvant-induced arthritis model displays coronary endothelial dysfunction associated with myocardial hypertrophy and a reduced tolerance to ischemia. This model might be useful for deciphering the pathophysiology of cardiac dysfunction in rheumatoid arthritis and paves the way for studying the role of endothelin-1 and angiotensin II.
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Affiliation(s)
- Romain Bordy
- PEPITE EA 4267, FHU INCREASE, University Bourgogne Franche-Comté, 25000 Besançon, France
| | - Johnny Moretto
- PEPITE EA 4267, FHU INCREASE, University Bourgogne Franche-Comté, 25000 Besançon, France
| | - Sylvie Devaux
- PEPITE EA 4267, FHU INCREASE, University Bourgogne Franche-Comté, 25000 Besançon, France
| | - Daniel Wendling
- EA 4266 EPILAB, University Bourgogne Franche-Comté, 25000 Besançon, France; Service de Rhumatologie, CHU Minjoz, 25000 Besançon, France
| | | | - Céline Demougeot
- PEPITE EA 4267, FHU INCREASE, University Bourgogne Franche-Comté, 25000 Besançon, France
| | - Perle Totoson
- PEPITE EA 4267, FHU INCREASE, University Bourgogne Franche-Comté, 25000 Besançon, France.
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3
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Wang JW, Li AY, Guo QH, Guo YJ, Weiss JW, Ji ES. Endothelin-1 and ET receptors impair left ventricular function by mediated coronary arteries dysfunction in chronic intermittent hypoxia rats. Physiol Rep 2017; 5:5/1/e13050. [PMID: 28057852 PMCID: PMC5256153 DOI: 10.14814/phy2.13050] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2016] [Revised: 11/02/2016] [Accepted: 11/03/2016] [Indexed: 12/18/2022] Open
Abstract
Obstructive sleep apnea (OSA) results in cardiac dysfunction and vascular endothelium injury. Chronic intermittent hypoxia (CIH), the main characteristic of OSAS, is considered to be mainly responsible for cardiovascular system impairment. This study is aimed to evaluate the role of endothelin‐1(ET‐1) system in coronary injury and cardiac dysfunction in CIH rats. In our study, Sprague–Dawley rats were exposed to CIH (FiO2 9% for 1.5 min, repeated every 3 min for 8 h/d, 7 days/week for 3 weeks). After 3 weeks, the left ventricular developed pressure (LVDP) and coronary resistance (CR) were measured with the langendorff mode in isolated hearts. Meanwhile, expressions of ET‐1 and ET receptors were detected by immunohistochemical and western blot, histological changes were also observed to determine effects of CIH on coronary endothelial cells. Results suggested that decreased LVDP level combined with augmented coronary resistance was exist in CIH rats. CIH could induce endothelial injury and endothelium‐dependent vasodilatation dysfunction in the coronary arteries. Furthermore, ET‐1 and ETA receptor expressions in coronary vessels were increased after CIH exposure, whereas ETB receptors expression was decreased. Coronary contractile response to ET‐1 in both normoxia and CIH rats was inhibited by ETA receptor antagonist BQ123. However, ETB receptor antagonist BQ788 enhanced ET‐1‐induced contractile in normoxia group, but had no significant effects on CIH group. These results indicate that CIH‐induced cardiac dysfunction may be associated with coronary injury. ET‐1 plays an important role in coronary pathogenesis of CIH through ETA receptor by mediating a potent vasoconstrictor response. Moreover, decreased ETB receptor expression that leads to endothelium‐dependent vasodilatation decline, might be also participated in coronary and cardiac dysfunction.
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Affiliation(s)
- Jin-Wei Wang
- Department of Physiology, Hebei University of Chinese Medicine, Shijiazhuang, Hebei, China
| | - Ai-Ying Li
- Department of Biochemistry, Hebei University of Chinese Medicine, Shijiazhuang, Hebei, China
| | - Qiu-Hong Guo
- Department of Pharmacology, Hebei University of Chinese Medicine, Shijiazhuang, Hebei, China
| | - Ya-Jing Guo
- Department of Physiology, Hebei University of Chinese Medicine, Shijiazhuang, Hebei, China
| | - James W Weiss
- Division of Pulmonary, Critical Care and Sleep Medicine, Beth Israel Deaconess Medical Center, Boston, Massachusetts
| | - En-Sheng Ji
- Department of Physiology, Hebei University of Chinese Medicine, Shijiazhuang, Hebei, China
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4
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Kristiansen SB, Haanes KA, Sheykhzade M, Edvinsson L. Endothelin receptor mediated Ca 2+ signaling in coronary arteries after experimentally induced ischemia/reperfusion injury in rat. J Mol Cell Cardiol 2017; 111:1-9. [DOI: 10.1016/j.yjmcc.2017.07.013] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/07/2017] [Revised: 07/13/2017] [Accepted: 07/21/2017] [Indexed: 11/28/2022]
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5
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Kristiansen SB, Sheykhzade M, Edvinsson L, Haanes KA. Changes in vasodilation following myocardial ischemia/reperfusion in rats. Nitric Oxide 2017; 70:68-75. [PMID: 28919322 DOI: 10.1016/j.niox.2017.09.002] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2017] [Revised: 08/01/2017] [Accepted: 09/12/2017] [Indexed: 01/08/2023]
Abstract
BACKGROUND Blockage of a coronary artery, usually caused by arteriosclerosis, can lead to life threatening acute myocardial infarction. Opening with PCI (percutaneous coronary intervention), may be lifesaving, but reperfusion might exacerbate the cellular damage, and changes in the endothelium are believed to be involved in this worsened outcome. AIM The aim of the present study was to compare endothelial dependent and independent vasodilatory effect after experimental myocardial ischemia/reperfusion (I/R). METHODS A well-established rat model of myocardial ischemia with 24 h of reperfusion was applied, followed by a study in a wire myograph. RESULTS Endothelial NO dependent relaxation in response to carbachol, was sensitive to arterial depolarization, and was unaffected by I/R. In contrast, endothelial NO dependent ADPβS signalling, which was not sensitive to arterial depolarization, was significantly reduced after I/R. Following I/R, an H2O2 dependent EDH induced dilation appears in response to both of the above agonists. In addition, calcitonin gene-related peptide (CGRP) induced vasodilation was reduced. CONCLUSION These data show that NO dependent ADPβS induced dilation is reduced after I/R. However, there is some compensation by released H2O2 causing an EDH. Combined with a loss of maximal dilation in response to CGRP, the reduced vasodilation could be an important factor in understanding the exacerbated damage after I/R.
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Affiliation(s)
- Sarah Brøgger Kristiansen
- Department of Clinical Experimental Research, Glostrup Research Institute, Copenhagen University Hospital, Rigshospitalet-Glostrup, Denmark; Department of Drug Design and Pharmacology, Faculty of Health and Medical Sciences, University of Copenhagen, Denmark
| | - Majid Sheykhzade
- Department of Drug Design and Pharmacology, Faculty of Health and Medical Sciences, University of Copenhagen, Denmark
| | - Lars Edvinsson
- Department of Clinical Experimental Research, Glostrup Research Institute, Copenhagen University Hospital, Rigshospitalet-Glostrup, Denmark
| | - Kristian Agmund Haanes
- Department of Clinical Experimental Research, Glostrup Research Institute, Copenhagen University Hospital, Rigshospitalet-Glostrup, Denmark.
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6
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Skovsted GF, Kruse LS, Berchtold LA, Grell AS, Warfvinge K, Edvinsson L. Myocardial ischemia-reperfusion enhances transcriptional expression of endothelin-1 and vasoconstrictor ETB receptors via the protein kinase MEK-ERK1/2 signaling pathway in rat. PLoS One 2017; 12:e0174119. [PMID: 28323857 PMCID: PMC5360328 DOI: 10.1371/journal.pone.0174119] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2016] [Accepted: 03/03/2017] [Indexed: 12/20/2022] Open
Abstract
BACKGROUND Coronary artery remodelling and vasospasm is a complication of acute myocardial ischemia and reperfusion. The underlying mechanisms are complex, but the vasoconstrictor peptide endothelin-1 is suggested to have an important role. This study aimed to determine whether the expression of endothelin-1 and its receptors are regulated in the myocardium and in coronary arteries after experimental ischemia-reperfusion. Furthermore, we evaluated whether treatment with a specific MEK1/2 inhibitor, U0126, modified the expression and function of these proteins. METHODS AND FINDINGS Sprague-Dawley rats were randomly divided into three groups: sham-operated, ischemia-reperfusion with vehicle treatment and ischemia-reperfusion with U0126 treatment. Ischemia was induced by ligating the left anterior descending coronary artery for 30 minutes followed by reperfusion. U0126 was administered before ischemia and repeated 6 hours after start of reperfusion. The contractile properties of isolated coronary arteries to endothelin-1 and sarafotoxin 6c were evaluated using wire-myography. The gene expression of endothelin-1 and endothelin receptors were measured using qPCR. Distribution and localization of proteins (pERK1/2, prepro-endothelin-1, endothelin-1, and endothelin ETA and ETB receptors) were analysed by Western blot and immunohistochemistry. We found that pERK1/2 was significantly augmented in the ischemic area 3 hours after ischemia-reperfusion; this correlated with increased ETB receptor and ET-1 gene expressions in ischemic myocardium and in coronary arteries. ETB receptor-mediated vasoconstriction was observed to be increased in coronary arteries 24 hours after ischemia-reperfusion. Treatment with U0126 reduced pERK1/2, expression of ET-1 and ETB receptor, and ETB receptor-mediated vasoconstriction. CONCLUSIONS These findings suggest that the MEK-ERK1/2 signaling pathway is important for regulating endothelin-1 and ETB receptors in myocardium and coronary arteries after ischemia-reperfusion in the ischemic region. Inhibition of the MEK-ERK1/2 pathway may provide a novel target for reducing ischemia-reperfusion damage in the heart.
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Affiliation(s)
- Gry Freja Skovsted
- Department of Clinical Experimental Research, Glostrup Research Institute, Rigshospitalet, University of Copenhagen, Glostrup, Denmark
- * E-mail:
| | - Lars Schack Kruse
- Department of Clinical Experimental Research, Glostrup Research Institute, Rigshospitalet, University of Copenhagen, Glostrup, Denmark
| | - Lukas Adrian Berchtold
- Department of Biomedical Sciences, Cellular and Metabolic Research Section, University of Copenhagen, Copenhagen, Denmark
| | - Anne-Sofie Grell
- Department of Clinical Experimental Research, Glostrup Research Institute, Rigshospitalet, University of Copenhagen, Glostrup, Denmark
| | - Karin Warfvinge
- Department of Clinical Experimental Research, Glostrup Research Institute, Rigshospitalet, University of Copenhagen, Glostrup, Denmark
| | - Lars Edvinsson
- Department of Clinical Experimental Research, Glostrup Research Institute, Rigshospitalet, University of Copenhagen, Glostrup, Denmark
- Department of Medicine, Institute of Clinical Sciences in Lund, Lund University, Lund, Sweden
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7
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Blixt FW, Johansson SE, Johnson L, Haanes KA, Warfvinge K, Edvinsson L. Enhanced Endothelin-1 Mediated Vasoconstriction of the Ophthalmic Artery May Exacerbate Retinal Damage after Transient Global Cerebral Ischemia in Rat. PLoS One 2016; 11:e0157669. [PMID: 27322388 PMCID: PMC4913955 DOI: 10.1371/journal.pone.0157669] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2016] [Accepted: 06/02/2016] [Indexed: 11/18/2022] Open
Abstract
Cerebral vasculature is often the target of stroke studies. However, the vasculature supplying the eye might also be affected by ischemia. The aim of the present study was to investigate if the transient global cerebral ischemia (GCI) enhances vascular effect of endothelin-1 (ET-1) and 5-hydroxytryptamine/serotonin (5-HT) on the ophthalmic artery in rats, leading to delayed retinal damage. This was preformed using myography on the ophthalmic artery, coupled with immunohistochemistry and electroretinogram (ERG) to assess the ischemic consequences on the retina. Results showed a significant increase of ET-1 mediated vasoconstriction at 48 hours post ischemia. The retina did not exhibit any morphological changes throughout the study. However, we found an increase of GFAP and vimentin expression at 72 hours and 7 days after ischemia, indicating Müller cell mediated gliosis. ERG revealed significantly decreased function at 72 hours, but recovered almost completely after 7 days. In conclusion, we propose that the increased contractile response via ET-1 receptors in the ophthalmic artery after 48 hours may elicit negative retinal consequences due to a second ischemic period. This may exacerbate retinal damage after ischemia as illustrated by the decreased retinal function and Müller cell activation. The ophthalmic artery and ET-1 mediated vasoconstriction may be a valid and novel therapeutic target after longer periods of ischemic insults.
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Affiliation(s)
- Frank W. Blixt
- Department of Clinical Sciences, Division of Experimental Vascular Research, Lund University, Lund, Sweden
- * E-mail:
| | - Sara Ellinor Johansson
- Department of Clinical Experimental Research, Glostrup Research Institute, Rigshospitalet, Glostrup, Denmark
| | - Leif Johnson
- Department of Ophthalmology, Glostrup Research Institute, Rigshospitalet, Glostrup, Denmark
| | - Kristian Agmund Haanes
- Department of Clinical Experimental Research, Glostrup Research Institute, Rigshospitalet, Glostrup, Denmark
| | - Karin Warfvinge
- Department of Clinical Sciences, Division of Experimental Vascular Research, Lund University, Lund, Sweden
- Department of Clinical Experimental Research, Glostrup Research Institute, Rigshospitalet, Glostrup, Denmark
| | - Lars Edvinsson
- Department of Clinical Sciences, Division of Experimental Vascular Research, Lund University, Lund, Sweden
- Department of Clinical Experimental Research, Glostrup Research Institute, Rigshospitalet, Glostrup, Denmark
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8
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Outzen EM, Zaki M, Abdolalizadeh B, Sams A, Boonen HCM, Sheykhzade M. Translational value of mechanical and vasomotor properties of mouse isolated mesenteric resistance-sized arteries. Pharmacol Res Perspect 2015; 3:e00200. [PMID: 27022471 PMCID: PMC4777254 DOI: 10.1002/prp2.200] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2015] [Accepted: 11/06/2015] [Indexed: 11/09/2022] Open
Abstract
Mice are increasingly used in vascular research for studying perturbations and responses to vasoactive agents in small artery preparations. Historically, small artery function has preferably been studied in rat isolated mesenteric resistance-sized arteries (MRA) using the wire myograph technique. Although different mouse arteries have been studied using the wire myograph no establishment of optimal settings has yet been performed. Therefore, the purposes of this study were firstly to establish the optimal settings for wire myograph studies of mouse MRA and compare them to those of rat MRA. Second, by surveying the literature, we aimed to evaluate the overall translatability of observed pharmacological vasomotor responses of mouse MRA to those obtained in rat MRA as well as corresponding and different arteries in terms of vessel size and species origin. Our results showed that the optimal conditions for maximal active force development in mouse MRA were not significantly different to those determined in rat MRA. Furthermore, we found that the observed concentration-dependent vasomotor responses of mouse MRA to noradrenaline, phenylephrine, angiotensin II, sarafotoxin 6c, 5-hydroxytryptamine, carbachol, sodium nitroprusside, and retigabine were generally similar to those described in rat MRA as well as arteries of different sizes and species origin. In summary, the results of this study provide a framework for evidence-based optimization of the isometric wire myograph setup to mouse MRA. Additionally, in terms of translational value, our study suggests that mouse MRA can be applied as a useful model for studying vascular reactivity.
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Affiliation(s)
- Emilie M. Outzen
- Department of Drug Design and PharmacologyFaculty of Health and Medical SciencesUniversity of CopenhagenCopenhagenDenmark
| | - Marina Zaki
- Department of Drug Design and PharmacologyFaculty of Health and Medical SciencesUniversity of CopenhagenCopenhagenDenmark
| | - Bahareh Abdolalizadeh
- Department of Drug Design and PharmacologyFaculty of Health and Medical SciencesUniversity of CopenhagenCopenhagenDenmark
| | - Anette Sams
- Department of Diabetic Complications BiologyNovo Nordisk A/SMaaloevDenmark
| | - Harrie C. M. Boonen
- Department of Drug Design and PharmacologyFaculty of Health and Medical SciencesUniversity of CopenhagenCopenhagenDenmark
| | - Majid Sheykhzade
- Department of Drug Design and PharmacologyFaculty of Health and Medical SciencesUniversity of CopenhagenCopenhagenDenmark
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9
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Skovsted GF, Kilic S, Edvinsson L. Endothelin-1 and Endothelin-3 Regulate Endothelin Receptor Expression in Rat Coronary Arteries. Basic Clin Pharmacol Toxicol 2015; 117:297-305. [PMID: 25891848 DOI: 10.1111/bcpt.12407] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2014] [Accepted: 04/07/2015] [Indexed: 11/30/2022]
Abstract
In ischaemic hearts, endothelin (ET) levels are increased, and vasoconstrictor responses to ET-1 are greatly enhanced. We previously reported that ETB receptors are up-regulated in the smooth muscle layer of coronary arteries after myocardial ischaemia-reperfusion and that the MEK-ERK1/2 signalling pathway is involved in ETB receptor up-regulation. Whether ETs are directly involved in receptor regulation has not been determined. We suggest that ET-1 and ET-3 alter the expression/activity of ET receptors in coronary vascular smooth muscle cells. Vasoconstrictor responses were studied in endothelium-denuded coronary artery segments from rats that were subjected to experimental ischaemia-reperfusion or in organ-cultured segments. Post-ischaemic and cultured coronary arteries exhibited similar increased sensitivity to ET-3. ETA receptor-mediated vasoconstriction was dominant in fresh and non-ischaemic arteries. Organ culture significantly up-regulated ETB receptors and down-regulated ETA receptor expression. Co-incubation with ET-1 (1 nM) or ET-3 (100 nM) induced further down-regulation of the ETA receptor mRNA, while the function and protein level of ETA remained unchanged. ET-3 (100 nM) further up-regulated ETB receptor mRNA and proteins but abolished ETB receptor-mediated vasoconstriction, suggesting a desensitization of ETB receptors that was not observed with ET-3 (1 nM). In conclusion, ET-1, which is the most prevalent isoform in the cardiovascular system, induces down-regulation of ETA receptor expression without changing ETA or ETB receptor function or protein levels. Intermediate concentrations of ET-3 had an effect that was similar to that of ET-1, such that high concentrations of ET-3 (100 nM) up-regulated the ETB receptor at the gene and protein levels but switched off the function of the ETB receptors via desensitization.
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Affiliation(s)
- Gry Freja Skovsted
- Department of Clinical Experimental Research, Glostrup Research Institute, Glostrup Hospital, Copenhagen, Denmark
| | - Semsi Kilic
- Department of Clinical Experimental Research, Glostrup Research Institute, Glostrup Hospital, Copenhagen, Denmark
| | - Lars Edvinsson
- Department of Clinical Experimental Research, Glostrup Research Institute, Glostrup Hospital, Copenhagen, Denmark.,Division of Experimental Vascular Research, Department of Clinical Sciences, Lund University, Lund, Sweden
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10
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Skovsted GF, Kruse LS, Larsen R, Pedersen AF, Trautner S, Sheykhzade M, Edvinsson L. Heart ischaemia-reperfusion induces local up-regulation of vasoconstrictor endothelin ETB receptors in rat coronary arteries downstream of occlusion. Br J Pharmacol 2014; 171:2726-38. [PMID: 24467585 DOI: 10.1111/bph.12606] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2013] [Revised: 11/04/2013] [Accepted: 11/22/2013] [Indexed: 12/20/2022] Open
Abstract
BACKGROUND AND PURPOSE Endothelins act via two receptor subtypes, ETA and ETB . Under physiological conditions in coronary arteries, ETA receptors expressed in smooth muscle cells mediate vasoconstriction whereas ETB receptors mainly found in endothelial cells mediate vasorelaxation. However, under pathophysiological conditions, ETB receptors may also be expressed in vascular smooth muscle cells mediating vasoconstriction. Here, we have investigated whether vasoconstrictor ETB receptors are up-regulated in coronary arteries after experimental myocardial ischaemia in rats. EXPERIMENTAL APPROACH Male Sprague-Dawley rats were subjected to either heart ischaemia-reperfusion (15 min ischaemia and 22 h reperfusion), permanent ischaemia (22 h) by ligation of the left anterior descending coronary artery, or sham operation. Using wire myography, the endothelin receptor subtypes mediating vasoconstriction were examined in isolated segments of the left anterior descending and the non-ligated septal coronary arteries. Endothelin receptor-mediated vasoconstriction was examined with cumulative administration of sarafotoxin 6c (ETB receptor agonist) and endothelin-1 (with or without ETA or ETB receptor blockade). The distribution of ETB receptors was localized with immunohistochemistry and quantified by Western blot. KEY RESULTS Endothelin ETB receptor-mediated vasoconstriction and receptor protein levels were significantly augmented in coronary arteries situated downstream of the occlusion after ischaemia-reperfusion compared with non-ischaemic arteries. In contrast, the ETA receptor-mediated vasoconstriction was unaltered in all groups. CONCLUSIONS AND IMPLICATIONS Ischaemia-reperfusion induced local up-regulation of ETB receptors in the smooth muscle cells of coronary arteries in the post-ischaemic area. In contrast, in non-ischaemic areas, ETB receptor function was unaltered.
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Affiliation(s)
- G F Skovsted
- Department of Clinical Experimental Research, Glostrup Research Institute, Glostrup Hospital, University of Copenhagen, Copenhagen, Denmark; Department of Drug Design and Pharmacology, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
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11
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Homocysteine-induced attenuation of vascular endothelium-dependent hyperalgesia in the rat. Neuroscience 2014; 284:678-684. [PMID: 25451284 DOI: 10.1016/j.neuroscience.2014.10.056] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2014] [Revised: 10/23/2014] [Accepted: 10/24/2014] [Indexed: 11/21/2022]
Abstract
We have recently demonstrated a role of the vascular endothelium in peripheral pain mechanism by disrupting endothelial cell function using intravascular administration of octoxynol-9, a non-selective membrane active agent. As an independent test of the role of endothelial cells in pain mechanisms, we evaluated the effect of homocysteine, an agent that damages endothelial cell function. Mechanical stimulus-induced enhancement of endothelin-1 hyperalgesia in the gastrocnemius muscle of the rat was first prevented then enhanced by intravenous administration of homocysteine, but was only inhibited by its precursor, methionine. Both homocysteine and methionine significantly attenuated mechanical hyperalgesia in two models of ergonomic muscle pain, induced by exposure to vibration, and by eccentric exercise, and cutaneous mechanical hyperalgesia in an ischemia-reperfusion injury model of Complex Regional Pain Syndrome type I, all previously shown responsive to octoxynol-9. This study provides independent support for a role of the endothelial cell in pain syndromes thought to have a vascular basis, and suggests that substances that are endothelial cell toxins can enhance vascular pain.
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Deng CY, Yang H, Kuang SJ, Rao F, Xue YM, Zhou ZL, Liu XY, Shan ZX, Li XH, Lin QX, Wu SL, Yu XY. Upregulation of 5-hydroxytryptamine receptor signaling in coronary arteries after organ culture. PLoS One 2014; 9:e107128. [PMID: 25202989 PMCID: PMC4159325 DOI: 10.1371/journal.pone.0107128] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2014] [Accepted: 08/13/2014] [Indexed: 02/07/2023] Open
Abstract
Background 5-Hydroxytryptamine (5-HT) is a powerful constrictor of coronary arteries and is considered to be involved in the pathophysiological mechanisms of coronary-artery spasm. However, the mechanism of enhancement of coronary-artery constriction to 5-HT during the development of coronary artery disease remains to be elucidated. Organ culture of intact blood-vessel segments has been suggested as a model for the phenotypic changes of smooth muscle cells in cardiovascular disease. Methodology/Principal Findings We wished to characterize 5-HT receptor-induced vasoconstriction and quantify expression of 5-HT receptor signaling in cultured rat coronary arteries. Cumulative application of 5-HT produced a concentration-dependent vasoconstriction in fresh and 24 h-cultured rat coronary arteries without endothelia. 5-HT induced greater constriction in cultured coronary arteries than in fresh coronary arteries. U46619- and CaCl2-induced constriction in the two groups was comparable. 5-HT stimulates the 5-HT2A receptor and cascade of phospholipase C to induce coronary vasoconstriction. Calcium influx through L-type calcium channels and non-L-type calcium channels contributed to the coronary-artery constrictions induced by 5-HT. The contractions mediated by non-L-type calcium channels were significantly enhanced in cultured coronary arteries compared with fresh coronary arteries. The vasoconstriction induced by thapsigargin was also augmented in cultured coronary arteries. The decrease in Orai1 expression significantly inhibited 5-HT-evoked entry of Ca2+ in coronary artery cells. Expression of the 5-HT2A receptor, Orai1 and STIM1 were augmented in cultured coronary arteries compared with fresh coronary arteries. Conclusions An increased contraction in response to 5-HT was mediated by the upregulation of 5-HT2A receptors and downstream signaling in cultured coronary arteries.
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MESH Headings
- 15-Hydroxy-11 alpha,9 alpha-(epoxymethano)prosta-5,13-dienoic Acid/pharmacology
- Animals
- Calcium/metabolism
- Calcium Channels/genetics
- Calcium Channels/metabolism
- Calcium Channels, L-Type/genetics
- Calcium Channels, L-Type/metabolism
- Coronary Vessels/drug effects
- Coronary Vessels/metabolism
- Male
- Membrane Glycoproteins/genetics
- Membrane Glycoproteins/metabolism
- Muscle, Smooth, Vascular/drug effects
- Muscle, Smooth, Vascular/metabolism
- Myocytes, Smooth Muscle/drug effects
- Myocytes, Smooth Muscle/metabolism
- ORAI1 Protein
- Organ Culture Techniques/methods
- Rats
- Rats, Sprague-Dawley
- Receptor, Serotonin, 5-HT2A/genetics
- Receptor, Serotonin, 5-HT2A/metabolism
- Serotonin/genetics
- Serotonin/metabolism
- Signal Transduction/drug effects
- Signal Transduction/genetics
- Stromal Interaction Molecule 1
- Thapsigargin/pharmacology
- Up-Regulation/drug effects
- Up-Regulation/genetics
- Vasoconstriction/drug effects
- Vasoconstriction/genetics
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Affiliation(s)
- Chun-Yu Deng
- Medical Research Center of Guangdong General Hospital, Guangzhou, P.R. China
- Guangdong Provincial Cardiovascular Institute, Guangdong Academy of Medical Sciences, Guangzhou, P.R. China
| | - Hui Yang
- Medical Research Center of Guangdong General Hospital, Guangzhou, P.R. China
- Guangdong Provincial Cardiovascular Institute, Guangdong Academy of Medical Sciences, Guangzhou, P.R. China
| | - Su-Juan Kuang
- Medical Research Center of Guangdong General Hospital, Guangzhou, P.R. China
- Guangdong Provincial Cardiovascular Institute, Guangdong Academy of Medical Sciences, Guangzhou, P.R. China
| | - Fang Rao
- Medical Research Center of Guangdong General Hospital, Guangzhou, P.R. China
- Guangdong Provincial Cardiovascular Institute, Guangdong Academy of Medical Sciences, Guangzhou, P.R. China
| | - Yu-Mei Xue
- Medical Research Center of Guangdong General Hospital, Guangzhou, P.R. China
- Guangdong Provincial Cardiovascular Institute, Guangdong Academy of Medical Sciences, Guangzhou, P.R. China
| | - Zhi-Ling Zhou
- Medical Research Center of Guangdong General Hospital, Guangzhou, P.R. China
- Guangdong Provincial Cardiovascular Institute, Guangdong Academy of Medical Sciences, Guangzhou, P.R. China
| | - Xiao-Ying Liu
- Medical Research Center of Guangdong General Hospital, Guangzhou, P.R. China
- Guangdong Provincial Cardiovascular Institute, Guangdong Academy of Medical Sciences, Guangzhou, P.R. China
| | - Zhi-Xin Shan
- Medical Research Center of Guangdong General Hospital, Guangzhou, P.R. China
- Guangdong Provincial Cardiovascular Institute, Guangdong Academy of Medical Sciences, Guangzhou, P.R. China
| | - Xiao-Hong Li
- Medical Research Center of Guangdong General Hospital, Guangzhou, P.R. China
- Guangdong Provincial Cardiovascular Institute, Guangdong Academy of Medical Sciences, Guangzhou, P.R. China
| | - Qiu-Xiong Lin
- Medical Research Center of Guangdong General Hospital, Guangzhou, P.R. China
- Guangdong Provincial Cardiovascular Institute, Guangdong Academy of Medical Sciences, Guangzhou, P.R. China
| | - Shu-Lin Wu
- Medical Research Center of Guangdong General Hospital, Guangzhou, P.R. China
- Guangdong Provincial Cardiovascular Institute, Guangdong Academy of Medical Sciences, Guangzhou, P.R. China
- * E-mail: (SLW); (XYY)
| | - Xi-Yong Yu
- Medical Research Center of Guangdong General Hospital, Guangzhou, P.R. China
- Guangdong Provincial Cardiovascular Institute, Guangdong Academy of Medical Sciences, Guangzhou, P.R. China
- * E-mail: (SLW); (XYY)
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Characterization of the contractile P2Y14 receptor in mouse coronary and cerebral arteries. FEBS Lett 2014; 588:2936-43. [PMID: 24911208 DOI: 10.1016/j.febslet.2014.05.044] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2014] [Revised: 05/13/2014] [Accepted: 05/21/2014] [Indexed: 01/12/2023]
Abstract
Extracellular UDP-glucose can activate the purinergic P2Y14 receptor. The aim of the present study was to examine the physiological importance of P2Y14 receptors in the vasculature. The data presented herein show that UDP-glucose causes contraction in mouse coronary and basilar arteries. The EC50 values and immunohistochemistry illustrated the strongest P2Y14 receptor expression in the basilar artery. In the presence of pertussis toxin, UDP-glucose inhibited contraction in coronary arteries and in the basilar artery it surprisingly caused relaxation. After organ culture of the coronary artery, the EC50 value decreased and an increased staining for the P2Y14 receptor was observed, showing receptor plasticity.
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Mazzuca MQ, Khalil RA. Vascular endothelin receptor type B: structure, function and dysregulation in vascular disease. Biochem Pharmacol 2012; 84:147-62. [PMID: 22484314 DOI: 10.1016/j.bcp.2012.03.020] [Citation(s) in RCA: 109] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2012] [Revised: 03/19/2012] [Accepted: 03/22/2012] [Indexed: 12/21/2022]
Abstract
Endothelin-1 (ET-1) is a major regulator of vascular function, acting via both endothelin receptor type A (ET(A)R) and type B (ET(B)R). Although the role of ET(A)R in vascular smooth muscle (VSM) contraction has been studied, little is known about ET(B)R. ET(B)R is a G-protein coupled receptor with a molecular mass of ~50 kDa and 442 amino acids arranged in seven transmembrane domains. Alternative splice variants of ET(B)R and heterodimerization and cross-talk with ET(A)R may affect the receptor function. ET(B)R has been identified in numerous blood vessels with substantial effects in the systemic, renal, pulmonary, coronary and cerebral circulation. ET(B)R in the endothelium mediates the release of relaxing factors such as nitric oxide, prostacyclin and endothelium-derived hyperpolarizing factor, and could also play a role in ET-1 clearance. ET(B)R in VSM mediates increases in [Ca(2+)](i), protein kinase C, mitogen-activated protein kinase and other pathways of VSM contraction and cell growth. ET-1/ET(A)R signaling has been associated with salt-sensitive hypertension (HTN) and pulmonary arterial hypertension (PAH), and ET(A)R antagonists have shown some benefits in these conditions. In search for other pathogenetic factors and more effective approaches, the role of alterations in endothelial ET(B)R and VSM ET(B)R in vascular dysfunction, and the potential benefits of modulators of ET(B)R in treatment of HTN and PAH are being examined. Combined ET(A)R/ET(B)R antagonists could be more efficacious in the management of conditions involving upregulation of ET(A)R and ET(B)R in VSM. Combined ET(A)R antagonist with ET(B)R agonist may need to be evaluated in conditions associated with decreased endothelial ET(B)R expression/activity.
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Affiliation(s)
- Marc Q Mazzuca
- Vascular Surgery Research Laboratory, Division of Vascular and Endovascular Surgery, Brigham and Women's Hospital and Harvard Medical School, Boston, MA 02115, USA
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