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Dales MO, Drummond RM, Kennedy C. How selective antagonists and genetic modification have helped characterise the expression and functions of vascular P2Y receptors. Purinergic Signal 2024:10.1007/s11302-024-10016-z. [PMID: 38740733 DOI: 10.1007/s11302-024-10016-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2023] [Accepted: 05/03/2024] [Indexed: 05/16/2024] Open
Abstract
Vascular P2Y receptors mediate many effects, but the role of individual subtypes is often unclear. Here we discuss how subtype-selective antagonists and receptor knockout/knockdown have helped identify these roles in numerous species and vessels. P2Y1 receptor-mediated vasoconstriction and endothelium-dependent vasodilation have been characterised using the selective antagonists, MRS2179 and MRS2216, whilst AR-C118925XX, a P2Y2 receptor antagonist, reduced endothelium-dependent relaxation, and signalling evoked by UTP or fluid shear stress. P2Y2 receptor knockdown reduced endothelial signalling and endothelial P2Y2 receptor knockout produced hypertensive mice and abolished vasodilation elicited by an increase in flow. UTP-evoked vasoconstriction was also blocked by AR-C118925XX, but the effects of P2Y2 receptor knockout were complex. No P2Y4 receptor antagonists are available and P2Y4 knockout did not affect the vascular actions of UTP and UDP. The P2Y6 receptor antagonist, MRS2578, identified endothelial P2Y6 receptors mediating vasodilation, but receptor knockout had complex effects. MRS2578 also inhibited, and P2Y6 knockout abolished, contractions evoked by UDP. P2Y6 receptors contribute to the myogenic tone induced by a stepped increase in vascular perfusion pressure and possibly to the development of atherosclerosis. The P2Y11 receptor antagonists, NF157 and NF340, inhibited ATP-evoked signalling in human endothelial cells. Vasoconstriction mediated by P2Y12/P2Y13 and P2Y14 receptors was characterised using the antagonists, cangrelor, ticagrelor, AR-C67085 and MRS2211 or PPTN respectively. This has yet to be backed up by receptor knockout experiments. Thus, subtype-selective antagonists and receptor knockout/knockdown have helped identify which P2Y subtypes are functionally expressed in vascular smooth muscle and endothelial cells and the effects that they mediate.
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Affiliation(s)
- Markie O Dales
- Strathclyde Institute of Pharmacy & Biomedical Sciences, University of Strathclyde, 161 Cathedral Street, Glasgow, G4 0RE, UK
| | - Robert M Drummond
- Strathclyde Institute of Pharmacy & Biomedical Sciences, University of Strathclyde, 161 Cathedral Street, Glasgow, G4 0RE, UK
| | - Charles Kennedy
- Strathclyde Institute of Pharmacy & Biomedical Sciences, University of Strathclyde, 161 Cathedral Street, Glasgow, G4 0RE, UK.
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2
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Ho SJ, Chaput D, Sinkey RG, Garces AH, New EP, Okuka M, Sang P, Arlier S, Semerci N, Steffensen TS, Rutherford TJ, Alsina AE, Cai J, Anderson ML, Magness RR, Uversky VN, Cummings DAT, Tsibris JCM. Proteomic studies of VEGFR2 in human placentas reveal protein associations with preeclampsia, diabetes, gravidity, and labor. Cell Commun Signal 2024; 22:221. [PMID: 38594674 PMCID: PMC11003095 DOI: 10.1186/s12964-024-01567-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2023] [Accepted: 03/09/2024] [Indexed: 04/11/2024] Open
Abstract
VEGFR2 (Vascular endothelial growth factor receptor 2) is a central regulator of placental angiogenesis. The study of the VEGFR2 proteome of chorionic villi at term revealed its partners MDMX (Double minute 4 protein) and PICALM (Phosphatidylinositol-binding clathrin assembly protein). Subsequently, the oxytocin receptor (OT-R) and vasopressin V1aR receptor were detected in MDMX and PICALM immunoprecipitations. Immunogold electron microscopy showed VEGFR2 on endothelial cell (EC) nuclei, mitochondria, and Hofbauer cells (HC), tissue-resident macrophages of the placenta. MDMX, PICALM, and V1aR were located on EC plasma membranes, nuclei, and HC nuclei. Unexpectedly, PICALM and OT-R were detected on EC projections into the fetal lumen and OT-R on 20-150 nm clusters therein, prompting the hypothesis that placental exosomes transport OT-R to the fetus and across the blood-brain barrier. Insights on gestational complications were gained by univariable and multivariable regression analyses associating preeclampsia with lower MDMX protein levels in membrane extracts of chorionic villi, and lower MDMX, PICALM, OT-R, and V1aR with spontaneous vaginal deliveries compared to cesarean deliveries before the onset of labor. We found select associations between higher MDMX, PICALM, OT-R protein levels and either gravidity, diabetes, BMI, maternal age, or neonatal weight, and correlations only between PICALM-OT-R (p < 2.7 × 10-8), PICALM-V1aR (p < 0.006), and OT-R-V1aR (p < 0.001). These results offer for exploration new partnerships in metabolic networks, tissue-resident immunity, and labor, notably for HC that predominantly express MDMX.
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Grants
- Department of Obstetrics and Gynecology, University of South Florida
- Department of Cell Biology, Microbiology and Molecular Biology, University of South Florida
- Lisa Muma Weitz Microscopy Laboratory, University of South Florida
- Department of Chemistry, University of South Florida
- Tampa General Hospital, Tampa, Florida
- Teasley Foundation
- Department of Molecular Medicine, University of South Florida
- Department of Biology, University of Florida
- Emerging Pathogens Institute, University of Florida
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Affiliation(s)
- Shannon J Ho
- Department of Obstetrics and Gynecology, University of South Florida, Tampa, FL, USA
| | - Dale Chaput
- Department of Cell Biology, Microbiology and Molecular Biology, University of South Florida, Tampa, FL, USA
| | - Rachel G Sinkey
- Department of Obstetrics and Gynecology, University of South Florida, Tampa, FL, USA
| | - Amanda H Garces
- Lisa Muma Weitz Microscopy Laboratory, University of South Florida, Tampa, FL, USA
| | - Erika P New
- Department of Obstetrics and Gynecology, University of South Florida, Tampa, FL, USA
| | - Maja Okuka
- Department of Obstetrics and Gynecology, University of South Florida, Tampa, FL, USA
| | - Peng Sang
- Department of Chemistry, University of South Florida, Tampa, FL, USA
| | - Sefa Arlier
- Department of Obstetrics and Gynecology, University of South Florida, Tampa, FL, USA
| | - Nihan Semerci
- Department of Obstetrics and Gynecology, University of South Florida, Tampa, FL, USA
| | | | - Thomas J Rutherford
- Department of Obstetrics and Gynecology, University of South Florida, Tampa, FL, USA
- Cancer Center, Tampa General Hospital, Tampa, FL, USA
| | - Angel E Alsina
- Transplant Surgery Center, Tampa General Hospital, Tampa, FL, USA
| | - Jianfeng Cai
- Department of Chemistry, University of South Florida, Tampa, FL, USA
| | - Matthew L Anderson
- Department of Obstetrics and Gynecology, University of South Florida, Tampa, FL, USA
- Cancer Center, Tampa General Hospital, Tampa, FL, USA
| | - Ronald R Magness
- Department of Obstetrics and Gynecology, University of South Florida, Tampa, FL, USA
| | - Vladimir N Uversky
- Department of Molecular Medicine, University of South Florida, Tampa, FL, USA
| | - Derek A T Cummings
- Department of Biology and Emerging Pathogens Institute, University of Florida, Gainesville, FL, USA
| | - John C M Tsibris
- Department of Obstetrics and Gynecology, University of South Florida, Tampa, FL, USA.
- Department of Molecular Medicine, University of South Florida, Tampa, FL, USA.
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3
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Oliveira NF, Monteiro MMLV, Mainieri NS, Tamura AS, Pereira LM, Crepaldi LD, Coutinho-Silva R, Savio LEB, Silva CLM. P2Y 2-P2X7 receptors cross-talk in primed mesenteric endothelial cells upregulates NF-κB signaling favoring mononuclear cell adhesion in schistosomiasis. Front Immunol 2024; 14:1328897. [PMID: 38239348 PMCID: PMC10794548 DOI: 10.3389/fimmu.2023.1328897] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2023] [Accepted: 12/06/2023] [Indexed: 01/22/2024] Open
Abstract
Schistosomiasis is an intravascular infectious disease that impacts over 200 million people globally. In its chronic stage, it leads to mesenteric inflammation with significant involvement of monocytes/macrophages. Endothelial cells lining the vessel lumens play a crucial role, and mount of evidence links this disease to a downregulation of endoprotective cell signaling favoring a primed and proinflammatory endothelial cell phenotype and therefore the loss of immunovascular homeostasis. One hallmark of infectious and inflammatory conditions is the release of nucleotides into the extracellular milieu, which, in turn, act as innate messengers, activating purinergic receptors and triggering cell-to-cell communication. ATP influences the progression of various diseases through P2X and P2Y purinergic receptor subtypes. Among these receptors, P2Y2 (P2Y2R) and P2X7 (P2X7R) receptors stand out, known for their roles in inflammation. However, their specific role in schistosomiasis has remained largely unexplored. Therefore, we hypothesized that endothelial P2Y2R and P2X7R could contribute to monocyte adhesion to mesenteric endothelial cells in schistosomiasis. Using a preclinical murine model of schistosomiasis associated with endothelial dysfunction and age-matched control mice, we showed that endothelial P2Y2R and P2X7R activation increased monocyte adhesion to cultured primary endothelial cells in both groups. However, a distinct upregulation of endothelial P2Y2R-driven canonical Ca2+ signaling was observed in the infected group, amplifying adhesion. In the control group, the coactivation of endothelial P2Y2R and P2X7R did not alter the maximal monocyte adhesion induced by each receptor individually. However, in the infected group, this coactivation induced a distinct upregulation of P2Y2R-P2X7R-driven canonical signaling, IL-1β release, and VCAM-1 expression, with underlying mechanisms involving inflammasome and NF-κB signaling. Therefore, current data suggest that schistosomiasis alters endothelial cell P2Y2R/P2X7R signaling during inflammation. These discoveries advance our understanding of schistosomiasis. This intricate interplay, driven by PAMP-triggered endothelial P2Y2R/P2X7R cross-talk, emerges as a potential key player in the mesenteric inflammation during schistosomiasis.
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Affiliation(s)
- Nathália Ferreira Oliveira
- Laboratório de Farmacologia Bioquímica e Molecular, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
| | | | - Nathália Santos Mainieri
- Laboratório de Farmacologia Bioquímica e Molecular, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
| | - Augusto Shuiti Tamura
- Laboratório de Imunofisiologia, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
| | - Letícia Massimo Pereira
- Laboratório de Farmacologia Bioquímica e Molecular, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
| | - Leticia Diniz Crepaldi
- Laboratório de Imunofisiologia, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
| | - Robson Coutinho-Silva
- Laboratório de Imunofisiologia, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
| | | | - Claudia Lucia Martins Silva
- Laboratório de Farmacologia Bioquímica e Molecular, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
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Silva-Velasco RC, Villanueva-Castillo B, Haanes KA, MaassenVanDenBrink A, Villalón CM. Pharmacological Nature of the Purinergic P2Y Receptor Subtypes That Participate in the Blood Pressure Changes Produced by ADPβS in Rats. Pharmaceuticals (Basel) 2023; 16:1683. [PMID: 38139810 PMCID: PMC10747513 DOI: 10.3390/ph16121683] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2023] [Revised: 11/29/2023] [Accepted: 11/30/2023] [Indexed: 12/24/2023] Open
Abstract
Purine nucleosides (adenosine) and nucleotides such as adenosine mono/di/triphosphate (AMP/ADP/ATP) may produce complex cardiovascular responses. For example, adenosine-5'-(β-thio)-diphosphate (ADPβS; a stable synthetic analogue of ADP) can induce vasodilatation/vasodepressor responses by endothelium-dependent and independent mechanisms involving purinergic P2Y receptors; however, the specific subtypes participating in these responses remain unknown. Therefore, this study investigated the receptor subtypes mediating the blood pressure changes induced by intravenous bolus of ADPβS in male Wistar rats in the absence and presence of central mechanisms with the antagonists MRS2500 (P2Y1), PSB0739 (P2Y12), and MRS2211 (P2Y13). For this purpose, 120 rats were divided into 60 anaesthetised rats and 60 pithed rats, and further subdivided into four groups (n = 30 each), namely: (a) anaesthetised rats, (b) anaesthetised rats with bilateral vagotomy, (c) pithed rats, and (d) pithed rats continuously infused (intravenously) with methoxamine (an α1-adrenergic agonist that restores systemic vascular tone). We observed, in all four groups, that the immediate decreases in diastolic blood pressure produced by ADPβS were exclusively mediated by peripheral activation of P2Y1 receptors. Nevertheless, the subsequent increases in systolic blood pressure elicited by ADPβS in pithed rats infused with methoxamine probably involved peripheral activation of P2Y1, P2Y12, and P2Y13 receptors.
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Affiliation(s)
- Roberto C. Silva-Velasco
- Departamento de Farmacobiología, Cinvestav-Coapa, Czda. de los Tenorios 235, Col. Granjas-Coapa, Deleg. Tlalpan, Ciudad de México 14330, Mexico; (R.C.S.-V.); (B.V.-C.)
| | - Belinda Villanueva-Castillo
- Departamento de Farmacobiología, Cinvestav-Coapa, Czda. de los Tenorios 235, Col. Granjas-Coapa, Deleg. Tlalpan, Ciudad de México 14330, Mexico; (R.C.S.-V.); (B.V.-C.)
| | - Kristian A. Haanes
- Department of Clinical Experimental Research, Glostrup Research Institute, Copenhagen University Hospital—Rigshospitalet, Nordstjernevej 42, 2600 Glostrup, Denmark;
- Department of Biology, Section of Cell Biology and Physiology, University of Copenhagen, Universtitetsparken 13, 2100 Copenhagen Ø, Denmark
| | - Antoinette MaassenVanDenBrink
- Division of Vascular Medicine and Pharmacology, Erasmus MC University Medical Center Rotterdam, P.O. Box 2040, 3000 CA Rotterdam, The Netherlands;
| | - Carlos M. Villalón
- Departamento de Farmacobiología, Cinvestav-Coapa, Czda. de los Tenorios 235, Col. Granjas-Coapa, Deleg. Tlalpan, Ciudad de México 14330, Mexico; (R.C.S.-V.); (B.V.-C.)
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5
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Martin-Aragon Baudel M, Espinosa-Tanguma R, Nieves-Cintron M, Navedo MF. Purinergic Signaling During Hyperglycemia in Vascular Smooth Muscle Cells. Front Endocrinol (Lausanne) 2020; 11:329. [PMID: 32528416 PMCID: PMC7256624 DOI: 10.3389/fendo.2020.00329] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/13/2019] [Accepted: 04/28/2020] [Indexed: 12/15/2022] Open
Abstract
The activation of purinergic receptors by nucleotides and/or nucleosides plays an important role in the control of vascular function, including modulation of vascular smooth muscle excitability, and vascular reactivity. Accordingly, purinergic receptor actions, acting as either ion channels (P2X) or G protein-coupled receptors (GCPRs) (P1, P2Y), target diverse downstream effectors, and substrates to regulate vascular smooth muscle function and vascular reactivity. Both vasorelaxant and vasoconstrictive effects have been shown to be mediated by different purinergic receptors in a vascular bed- and species-specific manner. Purinergic signaling has been shown to play a key role in altering vascular smooth muscle excitability and vascular reactivity following acute and short-term elevations in extracellular glucose (e.g., hyperglycemia). Moreover, there is evidence that vascular smooth muscle excitability and vascular reactivity is severely impaired during diabetes and that this is mediated, at least in part, by activation of purinergic receptors. Thus, purinergic receptors present themselves as important candidates mediating vascular reactivity in hyperglycemia, with potentially important clinical and therapeutic potential. In this review, we provide a narrative summarizing our current understanding of the expression, function, and signaling of purinergic receptors specifically in vascular smooth muscle cells and discuss their role in vascular complications following hyperglycemia and diabetes.
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Affiliation(s)
- Miguel Martin-Aragon Baudel
- Department of Pharmacology, University of California, Davis, Davis, CA, United States
- *Correspondence: Miguel Martin-Aragon Baudel
| | - Ricardo Espinosa-Tanguma
- Departamento de Fisiologia y Biofisca, Universidad Autónoma San Luis Potosí, San Luis Potosí, Mexico
| | | | - Manuel F. Navedo
- Department of Pharmacology, University of California, Davis, Davis, CA, United States
- Manuel F. Navedo
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6
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Zemskov EA, Lu Q, Ornatowski W, Klinger CN, Desai AA, Maltepe E, Yuan JXJ, Wang T, Fineman JR, Black SM. Biomechanical Forces and Oxidative Stress: Implications for Pulmonary Vascular Disease. Antioxid Redox Signal 2019; 31:819-842. [PMID: 30623676 PMCID: PMC6751394 DOI: 10.1089/ars.2018.7720] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Significance: Oxidative stress in the cell is characterized by excessive generation of reactive oxygen species (ROS). Superoxide (O2-) and hydrogen peroxide (H2O2) are the main ROS involved in the regulation of cellular metabolism. As our fundamental understanding of the underlying causes of lung disease has increased it has become evident that oxidative stress plays a critical role. Recent Advances: A number of cells in the lung both produce, and respond to, ROS. These include vascular endothelial and smooth muscle cells, fibroblasts, and epithelial cells as well as the cells involved in the inflammatory response, including macrophages, neutrophils, eosinophils. The redox system is involved in multiple aspects of cell metabolism and cell homeostasis. Critical Issues: Dysregulation of the cellular redox system has consequential effects on cell signaling pathways that are intimately involved in disease progression. The lung is exposed to biomechanical forces (fluid shear stress, cyclic stretch, and pressure) due to the passage of blood through the pulmonary vessels and the distension of the lungs during the breathing cycle. Cells within the lung respond to these forces by activating signal transduction pathways that alter their redox state with both physiologic and pathologic consequences. Future Directions: Here, we will discuss the intimate relationship between biomechanical forces and redox signaling and its role in the development of pulmonary disease. An understanding of the molecular mechanisms induced by biomechanical forces in the pulmonary vasculature is necessary for the development of new therapeutic strategies.
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Affiliation(s)
- Evgeny A Zemskov
- Department of Medicine, The University of Arizona Health Sciences, Tucson, Arizona
| | - Qing Lu
- Department of Medicine, The University of Arizona Health Sciences, Tucson, Arizona
| | - Wojciech Ornatowski
- Department of Medicine, The University of Arizona Health Sciences, Tucson, Arizona
| | - Christina N Klinger
- Department of Medicine, The University of Arizona Health Sciences, Tucson, Arizona
| | - Ankit A Desai
- Department of Medicine, Indiana University, Indianapolis, Indiana
| | - Emin Maltepe
- Department of Pediatrics, University of California, San Francisco, San Francisco, California
| | - Jason X-J Yuan
- Department of Medicine, The University of Arizona Health Sciences, Tucson, Arizona
| | - Ting Wang
- Department of Internal Medicine, The University of Arizona Health Sciences, Phoenix, Arizona
| | - Jeffrey R Fineman
- Department of Pediatrics, University of California, San Francisco, San Francisco, California
| | - Stephen M Black
- Department of Medicine, The University of Arizona Health Sciences, Tucson, Arizona
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Contreras-Duarte S, Carvajal L, Fuenzalida B, Cantin C, Sobrevia L, Leiva A. Maternal Dyslipidaemia in Pregnancy with Gestational Diabetes Mellitus: Possible Impact on Foetoplacental Vascular Function and Lipoproteins in the Neonatal Circulation. Curr Vasc Pharmacol 2018; 17:52-71. [DOI: 10.2174/1570161115666171116154247] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2017] [Revised: 10/30/2017] [Accepted: 11/04/2017] [Indexed: 01/06/2023]
Abstract
Dyslipidaemia occurs in pregnancy to secure foetal development. The mother shows a physiological
increase in plasma total cholesterol and Triglycerides (TG) as pregnancy progresses (i.e. maternal
physiological dyslipidaemia in pregnancy). However, in some women pregnancy-associated dyslipidaemia
exceeds this physiological adaptation. The consequences of this condition on the developing
fetus include endothelial dysfunction of the foetoplacental vasculature and development of foetal aortic
atherosclerosis. Gestational Diabetes Mellitus (GDM) associates with abnormal function of the foetoplacental
vasculature due to foetal hyperglycaemia and hyperinsulinaemia, and associates with development
of cardiovascular disease in adulthood. Supraphysiological dyslipidaemia is also detected in
GDM pregnancies. Although there are several studies showing the alteration in the maternal and neonatal
lipid profile in GDM pregnancies, there are no studies addressing the effect of dyslipidaemia in the
maternal and foetal vasculature. The literature reviewed suggests that dyslipidaemia in GDM pregnancy
should be an additional factor contributing to worsen GDM-associated endothelial dysfunction by altering
signalling pathways involving nitric oxide bioavailability and neonatal lipoproteins.
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Affiliation(s)
- Susana Contreras-Duarte
- Cellular and Molecular Physiology Laboratory (CMPL), Division of Obstetrics and Gynaecology, School of Medicine, Faculty of Medicine, Pontifical Catholic University of Chile, Santiago 8330024, Chile
| | - Lorena Carvajal
- Cellular and Molecular Physiology Laboratory (CMPL), Division of Obstetrics and Gynaecology, School of Medicine, Faculty of Medicine, Pontifical Catholic University of Chile, Santiago 8330024, Chile
| | - Bárbara Fuenzalida
- Cellular and Molecular Physiology Laboratory (CMPL), Division of Obstetrics and Gynaecology, School of Medicine, Faculty of Medicine, Pontifical Catholic University of Chile, Santiago 8330024, Chile
| | - Claudette Cantin
- Cellular and Molecular Physiology Laboratory (CMPL), Division of Obstetrics and Gynaecology, School of Medicine, Faculty of Medicine, Pontifical Catholic University of Chile, Santiago 8330024, Chile
| | - Luis Sobrevia
- Cellular and Molecular Physiology Laboratory (CMPL), Division of Obstetrics and Gynaecology, School of Medicine, Faculty of Medicine, Pontifical Catholic University of Chile, Santiago 8330024, Chile
| | - Andrea Leiva
- Cellular and Molecular Physiology Laboratory (CMPL), Division of Obstetrics and Gynaecology, School of Medicine, Faculty of Medicine, Pontifical Catholic University of Chile, Santiago 8330024, Chile
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Razak AA, Leach L, Ralevic V. Impaired vasocontractile responses to adenosine in chorionic vessels of human term placenta from pregnant women with pre-existing and gestational diabetes. Diab Vasc Dis Res 2018; 15:528-540. [PMID: 30130976 DOI: 10.1177/1479164118790904] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
BACKGROUND There is clinical and experimental evidence for altered adenosine signalling in the fetoplacental circulation in pregnancies complicated by diabetes, leading to adenosine accumulation in the placenta. However, the consequence for fetoplacental vasocontractility is unclear. This study examined contractility to adenosine of chorionic vessels from type 1 diabetes mellitus, gestational diabetes mellitus and normal pregnancies. METHODS Chorionic arteries and veins were isolated from human placenta from normal, gestational diabetes mellitus and type 1 diabetes mellitus pregnancies. Isometric tension recording measured responses to adenosine and the thromboxane A2 analogue U46619 (thromboxane A2 mediates fetoplacental vasoconstriction to adenosine). Adenosine and thromboxane prostanoid receptor protein expression was determined by immunoblotting. RESULTS Adenosine elicited contractions in chorionic arteries and veins which were impaired in both gestational diabetes mellitus and type 1 diabetes mellitus. Contractions to potassium chloride were unchanged. Adenosine A2A and A2B receptor protein levels were not different in gestational diabetes mellitus and normal pregnancies. Contractions to U46619 were unaltered in gestational diabetes mellitus arteries and increased in type 1 diabetes mellitus arteries. Overnight storage of vessels restored contractility to adenosine in gestational diabetes mellitus arteries and normalized contraction to U46619 in type 1 diabetes mellitus arteries. CONCLUSION These data are consistent with the concept of aberrant adenosine signalling in diabetes; they show for the first time that this involves impaired adenosine contractility of the fetoplacental vasculature.
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MESH Headings
- 15-Hydroxy-11 alpha,9 alpha-(epoxymethano)prosta-5,13-dienoic Acid/pharmacology
- Adenosine/pharmacology
- Arteries/drug effects
- Arteries/metabolism
- Arteries/physiopathology
- Case-Control Studies
- Chorion/blood supply
- Diabetes Mellitus, Type 1/diagnosis
- Diabetes Mellitus, Type 1/metabolism
- Diabetes Mellitus, Type 1/physiopathology
- Diabetes, Gestational/diagnosis
- Diabetes, Gestational/metabolism
- Diabetes, Gestational/physiopathology
- Female
- Humans
- Pregnancy
- Pregnancy in Diabetics/diagnosis
- Pregnancy in Diabetics/metabolism
- Pregnancy in Diabetics/physiopathology
- Receptor, Adenosine A2A/metabolism
- Receptor, Adenosine A2B/metabolism
- Receptor, Adenosine A3/metabolism
- Signal Transduction/drug effects
- Term Birth
- Vasoconstriction/drug effects
- Vasoconstrictor Agents/pharmacology
- Veins/drug effects
- Veins/metabolism
- Veins/physiopathology
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Affiliation(s)
- Azlina A Razak
- 1 School of Life Sciences, University of Nottingham, Medical School, Queen's Medical Centre, Nottingham, UK
- 2 Faculty of Medicine & Health Sciences, UCSI University, Kuala Lumpur, Malaysia
| | - Lopa Leach
- 1 School of Life Sciences, University of Nottingham, Medical School, Queen's Medical Centre, Nottingham, UK
| | - Vera Ralevic
- 1 School of Life Sciences, University of Nottingham, Medical School, Queen's Medical Centre, Nottingham, UK
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Cobine CA, McKechnie M, Brookfield RJ, Hannigan KI, Keef KD. Comparison of inhibitory neuromuscular transmission in the Cynomolgus monkey IAS and rectum: special emphasis on differences in purinergic transmission. J Physiol 2018; 596:5319-5341. [PMID: 30198065 DOI: 10.1113/jp275437] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2018] [Accepted: 09/07/2018] [Indexed: 01/04/2023] Open
Abstract
KEY POINTS Inhibitory neuromuscular transmission (NMT) was compared in the internal anal sphincter (IAS) and rectum of the Cynomolgus monkey, an animal with high gene sequence identity to humans. Nitrergic NMT was present in both muscles while purinergic NMT was limited to the rectum and VIPergic NMT to the IAS. The profile for monkey IAS more closely resembles humans than rodents. In both muscles, SK3 channels were localized to PDGFRα+ cells that were closely associated with nNOS+ /VIP+ nerves. Gene expression levels of P2RY subtypes were the same in IAS and rectum while KCNN expression levels were very similar. SK3 channel activation and inhibition caused faster/greater changes in contractile activity in rectum than IAS. P2Y1 receptor activation inhibited contraction in rectum while increasing contraction in IAS. The absence of purinergic NMT in the IAS may be due to poor coupling between P2Y1 receptors and SK3 channels on PDGFRα+ cells. ABSTRACT Inhibitory neuromuscular transmission (NMT) was compared in the internal anal sphincter (IAS) and rectum of the Cynomolgus monkey, an animal with a high gene sequence identity to humans. Electrical field stimulation produced nitric oxide synthase (NOS)-dependent contractile inhibition in both muscles whereas P2Y1-dependent purinergic NMT was restricted to rectum. An additional NOS-independent, α-chymotrypsin-sensitive component was identified in the IAS consistent with vasoactive intestinal peptide-ergic (VIPergic) NMT. Microelectrode recordings revealed slow NOS-dependent inhibitory junction potentials (IJPs) in both muscles and fast P2Y1-dependent IJPs in rectum. The basis for the difference in purinergic NMT was investigated. PDGFRα+ /SK3+ cells were closely aligned with nNOS+ /VIP+ neurons in both muscles. Gene expression of P2RY was the same in IAS and rectum (P2RY1>>P2RY2-14) while KCNN3 expression was 32% greater in rectum. The SK channel inhibitor apamin doubled contractile activity in rectum while having minimal effect in the IAS. Contractile inhibition elicited with the SK channel agonist CyPPA was five times faster in rectum than in the IAS. The P2Y1 receptor agonist MRS2365 inhibited contraction in rectum but increased contraction in the IAS. In conclusion, both the IAS and the rectum have nitrergic NMT whereas purinergic NMT is limited to rectum and VIPergic NMT to the IAS. The profile in monkey IAS more closely resembles that of humans than rodents. The lack of purinergic NMT in the IAS cannot be attributed to the absence of PDGFRα+ cells, P2Y1 receptors or SK3 channels. Rather, it appears to be due to poor coupling between P2Y1 receptors and SK3 channels on PDGFRα+ cells.
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Affiliation(s)
- C A Cobine
- Department of Physiology and Cell Biology, University of Nevada, Reno School of Medicine, Reno, NV, USA
| | - M McKechnie
- Department of Physiology and Cell Biology, University of Nevada, Reno School of Medicine, Reno, NV, USA
| | - R J Brookfield
- Department of Physiology and Cell Biology, University of Nevada, Reno School of Medicine, Reno, NV, USA
| | - K I Hannigan
- Department of Physiology and Cell Biology, University of Nevada, Reno School of Medicine, Reno, NV, USA
| | - K D Keef
- Department of Physiology and Cell Biology, University of Nevada, Reno School of Medicine, Reno, NV, USA
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Verónica Donoso M, Hernández F, Villalón T, Acuña-Castillo C, Pablo Huidobro-Toro J. Pharmacological dissection of the cellular mechanisms associated to the spontaneous and the mechanically stimulated ATP release by mesentery endothelial cells: roles of thrombin and TRPV. Purinergic Signal 2018; 14:121-139. [PMID: 29349673 DOI: 10.1007/s11302-017-9599-7] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2017] [Accepted: 12/19/2017] [Indexed: 02/06/2023] Open
Abstract
Endothelial cells participate in extracellular ATP release elicited by mechanosensors. To characterize the dynamic interactions between mechanical and chemical factors that modulate ATP secretion by the endothelium, we assessed and compared the mechanisms participating in the spontaneous (basal) and mechanically stimulated secretion using primary cultures of rat mesentery endothelial cells. ATP/metabolites were determined in the cell media prior to (basal) and after cell media displacement or a picospritzer buffer puff used as mechanical stimuli. Mechanical stimulation increased extracellular ATP that peaked within 1 min, and decayed to basal values in 10 min. Interruption of the vesicular transport route consistently blocked the spontaneous ATP secretion. Cells maintained in media lacking external Ca2+ elicited a spontaneous rise of extracellular ATP and adenosine, but failed to elicit a further extracellular ATP secretion following mechanical stimulation. 2-APB, a TRPV agonist, increased the spontaneous ATP secretion, but reduced the mechanical stimulation-induced nucleotide release. Pannexin1 or connexin blockers and gadolinium, a Piezo1 blocker, reduced the mechanically induced ATP release without altering spontaneous nucleotide levels. Moreover, thrombin or related agonists increased extracellular ATP secretion elicited by mechanical stimulation, without modifying spontaneous release. In sum, present results allow inferring that the spontaneous, extracellular nucleotide secretion is essentially mediated by ATP containing vesicles, while the mechanically induced secretion occurs essentially by connexin or pannexin1 hemichannel ATP transport, a finding fully supported by results from Panx1-/- rodents. Only the latter component is modulated by thrombin and related receptor agonists, highlighting a novel endothelium-smooth muscle signaling role of this anticoagulant.
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Affiliation(s)
- M Verónica Donoso
- Centro Desarrollo de NanoCiencia y Nanotecnología, CEDENNA y Laboratorio de Farmacología, Departamento de Biología, Facultad de Química y Biología, Universidad de Santiago, Alameda Lib. B. O'Higgins 3363, Estación Central, Santiago, Chile
| | - Felipe Hernández
- Centro Desarrollo de NanoCiencia y Nanotecnología, CEDENNA y Laboratorio de Farmacología, Departamento de Biología, Facultad de Química y Biología, Universidad de Santiago, Alameda Lib. B. O'Higgins 3363, Estación Central, Santiago, Chile
| | - Tania Villalón
- Centro Desarrollo de NanoCiencia y Nanotecnología, CEDENNA y Laboratorio de Farmacología, Departamento de Biología, Facultad de Química y Biología, Universidad de Santiago, Alameda Lib. B. O'Higgins 3363, Estación Central, Santiago, Chile
| | - Claudio Acuña-Castillo
- Centro Desarrollo de NanoCiencia y Nanotecnología, CEDENNA y Laboratorio de Farmacología, Departamento de Biología, Facultad de Química y Biología, Universidad de Santiago, Alameda Lib. B. O'Higgins 3363, Estación Central, Santiago, Chile
| | - J Pablo Huidobro-Toro
- Centro Desarrollo de NanoCiencia y Nanotecnología, CEDENNA y Laboratorio de Farmacología, Departamento de Biología, Facultad de Química y Biología, Universidad de Santiago, Alameda Lib. B. O'Higgins 3363, Estación Central, Santiago, Chile.
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Begandt D, Good ME, Keller AS, DeLalio LJ, Rowley C, Isakson BE, Figueroa XF. Pannexin channel and connexin hemichannel expression in vascular function and inflammation. BMC Cell Biol 2017; 18:2. [PMID: 28124621 PMCID: PMC5267334 DOI: 10.1186/s12860-016-0119-3] [Citation(s) in RCA: 45] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023] Open
Abstract
Control of blood flow distribution and tissue homeostasis depend on the tight regulation of and coordination between the microvascular network and circulating blood cells. Channels formed by connexins or pannexins that connect the intra- and extracellular compartments allow the release of paracrine signals, such as ATP and prostaglandins, and thus play a central role in achieving fine regulation and coordination of vascular function. This review focuses on vascular connexin hemichannels and pannexin channels. We review their expression pattern within the arterial and venous system with a special emphasis on how post-translational modifications by phosphorylation and S-nitrosylation of these channels modulate their function and contribute to vascular homeostasis. Furthermore, we highlight the contribution of these channels in smooth muscle cells and endothelial cells in the regulation of vasomotor tone as well as how these channels in endothelial cells regulate inflammatory responses such as during ischemic and hypoxic conditions. In addition, this review will touch on recent evidence implicating a role for these proteins in regulating red blood cell and platelet function.
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Affiliation(s)
- Daniela Begandt
- Robert M Berne Cardiovascular Research Center, University of Virginia School of Medicine, Charlottesville, VA, 22908, USA
| | - Miranda E Good
- Robert M Berne Cardiovascular Research Center, University of Virginia School of Medicine, Charlottesville, VA, 22908, USA
| | - Alex S Keller
- Robert M Berne Cardiovascular Research Center, University of Virginia School of Medicine, Charlottesville, VA, 22908, USA
| | - Leon J DeLalio
- Robert M Berne Cardiovascular Research Center, University of Virginia School of Medicine, Charlottesville, VA, 22908, USA
| | - Carol Rowley
- Robert M Berne Cardiovascular Research Center, University of Virginia School of Medicine, Charlottesville, VA, 22908, USA
| | - Brant E Isakson
- Robert M Berne Cardiovascular Research Center, University of Virginia School of Medicine, Charlottesville, VA, 22908, USA.,Department of Molecular Physiology and Biophysics, University of Virginia School of Medicine, Charlottesville, VA, USA
| | - Xavier F Figueroa
- Departamento de Fisiología, Facultad de Ciencias Biológicas, Pontificia Universidad Católica de Chile, Santiago, Chile.
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Dubovskaya LV, Bakakina YS, Volotovski ID. Cyclic guanosine monophosphate as a mediator in processes of stress-signal transduction in higher plants. Biophysics (Nagoya-shi) 2015. [DOI: 10.1134/s0006350915040089] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
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Zhou Z, Sun C, Tilley SL, Mustafa SJ. Mechanisms underlying uridine adenosine tetraphosphate-induced vascular contraction in mouse aorta: Role of thromboxane and purinergic receptors. Vascul Pharmacol 2015; 73:78-85. [PMID: 25921923 DOI: 10.1016/j.vph.2015.04.009] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2015] [Revised: 04/13/2015] [Accepted: 04/20/2015] [Indexed: 01/12/2023]
Abstract
Uridine adenosine tetraphosphate (Up4A), a novel endothelium-derived vasoactive agent, is proposed to play a role in cardiovascular disorders and induces aortic contraction through activation of cyclooxygenases (COXs). We and others demonstrated that activation of A1 or A3 adenosine receptors (ARs) results in vascular contraction via thromboxane (TX) A2 production. However, the mechanisms of Up4A-induced vascular contraction in mouse aorta are not understood. We hypothesize that Up4A-induced aortic contraction is through COX-derived TXA2 production, which requires activation of A1 and/or A3AR. Concentration responses to Up4A were conducted in isolated aorta. The TXB2 production, a metabolite of TXA2, was also measured. Up4A (10(-9)-10(-5)M) produced a concentration-dependent contraction >70%, which was markedly attenuated by COX and COX1 but not by COX2 inhibition. Notably, Up4A-induced aortic contraction was blunted by both TX synthase inhibitor ozagrel and TXA2 receptor (TP) antagonist SQ29548. Surprisingly, A3AR deletion had no effect on Up4A-induced contraction. Moreover, A1AR deletion or antagonism as well as A1/A3AR deletion potentiated Up4A-induced aortic contraction, suggesting a vasodilator influence of A1AR. In contrast, non-selective purinergic P2 receptor antagonist PPADS significantly blunted Up4A-induced aortic contraction to a similar extent as selective P2X1R antagonist MRS2159, the latter of which was further reduced by addition of ozagrel. Endothelial denudation almost fully attenuated Up4A-induced contraction. Furthermore, Up4A (3μM) increased TXB2 formation, which was inhibited by either MRS2159 or ozagrel. In conclusion, Up4A-induced aortic contraction depends on activation of TX synthase and TP, which partially requires the activation of P2X1R but not A1 or A3AR through an endothelium-dependent mechanism.
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Affiliation(s)
- Zhichao Zhou
- Department of Physiology and Pharmacology, Center for Cardiovascular and Respiratory Sciences, Clinical and Translational Science Institute, West Virginia University, Morgantown, WV, USA
| | - Changyan Sun
- Department of Physiology and Pharmacology, Center for Cardiovascular and Respiratory Sciences, Clinical and Translational Science Institute, West Virginia University, Morgantown, WV, USA
| | - Stephen L Tilley
- Department of Medicine, University of North Carolina, Chapel Hill, NC, USA
| | - S Jamal Mustafa
- Department of Physiology and Pharmacology, Center for Cardiovascular and Respiratory Sciences, Clinical and Translational Science Institute, West Virginia University, Morgantown, WV, USA.
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Kylhammar D, Bune LT, Rådegran G. P2Y₁ and P2Y₁₂ receptors in hypoxia- and adenosine diphosphate-induced pulmonary vasoconstriction in vivo in the pig. Eur J Appl Physiol 2014; 114:1995-2006. [PMID: 24929904 DOI: 10.1007/s00421-014-2921-y] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2014] [Accepted: 05/21/2014] [Indexed: 11/28/2022]
Abstract
PURPOSE To investigate the role of P2Y₁ and P2Y₁₂ receptors in hypoxia- and adenosine diphosphate (ADP)-induced pulmonary vasoconstriction. METHODS 19 anaesthetized, mechanically ventilated pigs (31.3 ± 0.7 kg) were evaluated in normoxia and hypoxia, without (n = 6) or with P2Y₁ receptor antagonist MRS2500 (n = 7) or P2Y₁₂ receptor antagonist cangrelor (n = 6) treatment. 12 pigs (29.3 ± 0.4 kg) were evaluated before and during ADP infusion, without and with MRS2500 (n = 6) or cangrelor (n = 6) pre-treatment. RESULTS Hypoxia increased (p < 0.05) mean pulmonary artery pressure (MPAP) by 14.2 ± 1.1 mmHg and pulmonary vascular resistance (PVR) by 2.7 ± 0.4 WU. Without treatment MPAP and PVR remained unaltered (p = ns) for 90 min hypoxia. During hypoxia MRS2500 decreased (p < 0.013) MPAP by 4.3 ± 1.2 mmHg within 15 min. Cangrelor decreased (p < 0.036) MPAP to be 3.3 ± 0.4 and 3.6 ± 0.6 mmHg lower than hypoxia baseline after 10 and 30 min. PVR was, however, unaltered (p = ns) by MRS2500 or cangrelor during hypoxia. ADP increased (p < 0.001) MPAP and PVR to stabilize 11.1 ± 1.3 mmHg and 2.7 ± 0.3 WU higher than baseline. MRS2500 or cangrelor pre-treatment totally abolished the sustained MPAP- and PVR-increases to ADP. CONCLUSIONS ADP elicits pulmonary vasoconstriction through P2Y₁ and P2Y₁₂ receptor activation. ADP is not a mandatory modulator, but may still contribute to pulmonary vascular tone during acute hypoxia. Further investigations into the mechanisms behind ADP-induced pulmonary vasoconstriction and the role of ADP as a modulator of pulmonary vascular tone during hypoxia are warranted.
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Affiliation(s)
- David Kylhammar
- The Öresund Cardiovascular Research Collaboration, The Section for Heart Failure and Valvular Disease, The Clinic for Heart- and Lung Disease, Skåne University Hospital, 221 85, Lund, Sweden,
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Burnstock G. Purinergic signalling in the reproductive system in health and disease. Purinergic Signal 2014; 10:157-87. [PMID: 24271059 PMCID: PMC3944041 DOI: 10.1007/s11302-013-9399-7] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2013] [Accepted: 10/24/2013] [Indexed: 12/16/2022] Open
Abstract
There are multiple roles for purinergic signalling in both male and female reproductive organs. ATP, released as a cotransmitter with noradrenaline from sympathetic nerves, contracts smooth muscle via P2X1 receptors in vas deferens, seminal vesicles, prostate and uterus, as well as in blood vessels. Male infertility occurs in P2X1 receptor knockout mice. Both short- and long-term trophic purinergic signalling occurs in reproductive organs. Purinergic signalling is involved in hormone secretion, penile erection, sperm motility and capacitation, and mucous production. Changes in purinoceptor expression occur in pathophysiological conditions, including pre-eclampsia, cancer and pain.
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Affiliation(s)
- Geoffrey Burnstock
- Autonomic Neuroscience Centre, University College Medical School, Rowland Hill Street, London, NW3 2PF, UK,
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17
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Burnstock G, Ralevic V. Purinergic signaling and blood vessels in health and disease. Pharmacol Rev 2013; 66:102-92. [PMID: 24335194 DOI: 10.1124/pr.113.008029] [Citation(s) in RCA: 219] [Impact Index Per Article: 19.9] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
Purinergic signaling plays important roles in control of vascular tone and remodeling. There is dual control of vascular tone by ATP released as a cotransmitter with noradrenaline from perivascular sympathetic nerves to cause vasoconstriction via P2X1 receptors, whereas ATP released from endothelial cells in response to changes in blood flow (producing shear stress) or hypoxia acts on P2X and P2Y receptors on endothelial cells to produce nitric oxide and endothelium-derived hyperpolarizing factor, which dilates vessels. ATP is also released from sensory-motor nerves during antidromic reflex activity to produce relaxation of some blood vessels. In this review, we stress the differences in neural and endothelial factors in purinergic control of different blood vessels. The long-term (trophic) actions of purine and pyrimidine nucleosides and nucleotides in promoting migration and proliferation of both vascular smooth muscle and endothelial cells via P1 and P2Y receptors during angiogenesis and vessel remodeling during restenosis after angioplasty are described. The pathophysiology of blood vessels and therapeutic potential of purinergic agents in diseases, including hypertension, atherosclerosis, ischemia, thrombosis and stroke, diabetes, and migraine, is discussed.
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Affiliation(s)
- Geoffrey Burnstock
- Autonomic Neuroscience Centre, University College Medical School, Rowland Hill Street, London NW3 2PF, UK; and Department of Pharmacology, The University of Melbourne, Australia.
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18
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Bender SB, Berwick ZC, Laughlin MH, Tune JD. Functional contribution of P2Y1 receptors to the control of coronary blood flow. J Appl Physiol (1985) 2011; 111:1744-50. [PMID: 21940850 DOI: 10.1152/japplphysiol.00946.2011] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
Activation of ADP-sensitive P2Y(1) receptors has been proposed as an integral step in the putative "nucleotide axis" regulating coronary blood flow. However, the specific mechanism(s) and overall contribution of P2Y(1) receptors to the control of coronary blood flow have not been clearly defined. Using vertically integrative studies in isolated coronary arterioles and open-chest anesthetized dogs, we examined the hypothesis that P2Y(1) receptors induce coronary vasodilation via an endothelium-dependent mechanism and contribute to coronary pressure-flow autoregulation and/or ischemic coronary vasodilation. Immunohistochemistry revealed P2Y(1) receptor expression in coronary arteriolar endothelial and vascular smooth muscle cells. The ADP analog 2-methylthio-ADP induced arteriolar dilation in vitro and in vivo that was abolished by the selective P2Y(1) antagonist MRS-2179 and the nitric oxide synthase inhibitor N(G)-nitro-l-arginine methyl ester. MRS-2179 did not alter baseline coronary flow in vivo but significantly attenuated coronary vasodilation to ATP in vitro and in vivo and the nonhydrolyzable ATP analog ATPγS in vitro. Coronary blood flow responses to alterations in coronary perfusion pressure (40-100 mmHg) or to a brief 15-s coronary artery occlusion were unaffected by MRS-2179. Our data reveal that P2Y(1) receptors are functionally expressed in the coronary circulation and that activation produces coronary vasodilation via an endothelium/nitric oxide-dependent mechanism. Although these receptors represent a critical component of purinergic coronary vasodilation, our findings indicate that P2Y(1) receptor activation is not required for coronary pressure-flow autoregulation or reactive hyperemia.
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Affiliation(s)
- Shawn B Bender
- Dept. of Biomedical Sciences, Univ. of Missouri, Columbia, MO 65211, USA.
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Tölle M, Schuchardt M, Wiedon A, Huang T, Klöckel L, Jankowski J, Jankowski V, Zidek W, van der Giet M. Differential effects of uridine adenosine tetraphosphate on purinoceptors in the rat isolated perfused kidney. Br J Pharmacol 2011; 161:530-40. [PMID: 20880394 DOI: 10.1111/j.1476-5381.2010.00914.x] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022] Open
Abstract
BACKGROUND AND PURPOSE Purinergic signalling plays an important role in vascular tone regulation in humans. We have identified uridine adenosine tetraphosphate (Up(4)A) as a novel and highly potent endothelial-derived contracting factor. Up(4)A induces strong vasoconstrictive effects in the renal vascular system mainly by P2X(1) receptor activation. However, other purinoceptors are also involved and were analysed here. EXPERIMENTAL APPROACH The rat isolated perfused kidney was used to characterize vasoactive actions of Up(4)A. KEY RESULTS After desensitization of the P2X(1) receptor by α,β-methylene ATP (α,β-meATP), Up(4)A showed dose-dependent P2Y(2)-mediated vasoconstriction. Continuous perfusion with Up(4)A evoked a biphasic vasoconstrictor effect: there was a strong and rapidly desensitizing vasoconstriction, inhibited by P2X(1) receptor desensitization. In addition, there is a long-lasting P2Y(2)-mediated vasoconstriction. This vasoconstriction could be blocked by suramin, but not by PPADS or reactive blue 2. In preparations of the rat isolated perfused kidney model with an elevated vascular tone, bolus application of Up(4)A showed a dose-dependent vasoconstriction that was followed by a dose-dependent vasodilation. The vasoconstriction was in part sensitive to P2X(1) receptor desensitization by α,β-meATP, and the remaining P2Y(2)-mediated vasoconstriction was only inhibited by suramin. The Up(4)A-induced vasodilation depended on activation of nitric oxide synthases, and was mediated by P2Y(1) and P2Y(2) receptor activation. CONCLUSIONS AND IMPLICATIONS Up(4)A activated P2X(1) and P2Y(2) receptors to act as a vasoconstrictor, whereas endothelium-dependent vasodilation was induced by P2Y(1/2) receptor activation. Up(4)A might be of relevance in the physiology and pathophysiology of vascular tone regulation.
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Affiliation(s)
- Markus Tölle
- Charité- Universitätsmedizin Berlin, Medical. Klinik mit Schwerpunkt Nephrologie, Hindenburgdamm 30, 12203 Berlin, Germany
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Norambuena A, Palma F, Poblete MI, Donoso MV, Pardo E, González A, Huidobro-Toro JP. UTP controls cell surface distribution and vasomotor activity of the human P2Y2 receptor through an epidermal growth factor receptor-transregulated mechanism. J Biol Chem 2009; 285:2940-50. [PMID: 19996104 DOI: 10.1074/jbc.m109.081166] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023] Open
Abstract
Extracellular nucleotides transmit signals into the cells through the P2 family of cell surface receptors. These receptors are amply expressed in human blood vessels and participate in vascular tone control; however, their signaling mechanisms remain unknown. Here we show that in smooth muscle cells of isolated human chorionic arteries, the activation of the P2Y(2) receptor (P2Y(2)R) induces not only its partition into membrane rafts but also its rapid internalization. Cholesterol depletion with methyl-beta-cyclodextrin reduced the association of the agonist-activated receptor into membrane rafts but did not affect either the UTP-mediated vasoconstrictions or the vasomotor responses elicited by both serotonin and KCl. Ex vivo perfusion of human chorionic artery segments with 1-10 mum UTP, a selective P2Y(2)R agonist, displaced the P2Y(2)R localization into membrane rafts within 1 min, a process preceded by the activation of both RhoA and Rac1 GTPases. AG1478, a selective and potent inhibitor of the epidermal growth factor receptor tyrosine kinase activity, not only blocked the UTP-induced vasomotor activity but also abrogated both RhoA and Rac1 activation, the P2Y(2)R association with membrane rafts, and its internalization. Altogether, these results show for the first time that the plasma membrane distribution of the P2Y(2)R is transregulated by the epidermal growth factor receptor, revealing an unsuspected functional interplay that controls both the membrane distribution and the vasomotor activity of the P2Y(2)R in intact human blood vessels.
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Affiliation(s)
- Andrés Norambuena
- Departamento de Ciencias Fisiológicas, Facultad de Ciencias Biológicas, Centro de Regulación Celular y Patología JV Luco, Instituto Milenio de Biología Fundamental y Aplicada, Santiago, Chile.
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Rodríguez-Rodríguez R, Yarova P, Winter P, Dora KA. Desensitization of endothelial P2Y1 receptors by PKC-dependent mechanisms in pressurized rat small mesenteric arteries. Br J Pharmacol 2009; 158:1609-20. [PMID: 19845669 DOI: 10.1111/j.1476-5381.2009.00456.x] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
Abstract
BACKGROUND AND PURPOSE Extracellular nucleotides play a crucial role in the regulation of vascular tone and blood flow. Stimulation of endothelial cell P2Y1 receptors evokes concentration-dependent full dilatation of resistance arteries. However, this GPCR can desensitize upon prolonged exposure to the agonist. Our aim was to determine the extent and nature of P2Y1 desensitization in isolated and pressurized rat small mesenteric arteries. EXPERIMENTAL APPROACH The non-hydrolyzable selective P2Y1 agonist ADPbetaS (3 microM) was perfused through the lumen of arteries pressurized to 70 mmHg. Changes in arterial diameter and endothelial cell [Ca(2+)](i) were obtained in the presence and absence of inhibitors of protein kinase C (PKC). KEY RESULTS ADPbetaS evoked rapid dilatation to the maximum arterial diameter but faded over time to a much-reduced plateau closer to 35% dilatation. This appeared to be due to desensitization of the P2Y1 receptor, as subsequent endothelium-dependent dilatation to acetylcholine (1 microM) remained unaffected. Luminal treatment with the PKC inhibitors BIS-I (1 microM) or BIS-VIII (1 microM) tended to augment concentration-dependent dilatation to ADPbetaS (0.1-3 microM) and prevented desensitization. Another PKC inhibitor, Gö 6976 (1 microM), was less effective in preventing desensitization. Measurements of endothelial cell [Ca(2+)](i) in pressurized arteries confirmed the P2Y1 receptor but not M(3) muscarinic receptor desensitization. CONCLUSIONS AND IMPLICATIONS These data demonstrate for the first time the involvement of PKC in the desensitization of endothelial P2Y1 receptors in pressurized rat mesenteric arteries, which may have important implications in the control of blood flow by circulating nucleotides.
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Buvinic S, Almarza G, Bustamante M, Casas M, López J, Riquelme M, Sáez JC, Huidobro-Toro JP, Jaimovich E. ATP released by electrical stimuli elicits calcium transients and gene expression in skeletal muscle. J Biol Chem 2009; 284:34490-505. [PMID: 19822518 DOI: 10.1074/jbc.m109.057315] [Citation(s) in RCA: 120] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023] Open
Abstract
ATP released from cells is known to activate plasma membrane P2X (ionotropic) or P2Y (metabotropic) receptors. In skeletal muscle cells, depolarizing stimuli induce both a fast calcium signal associated with contraction and a slow signal that regulates gene expression. Here we show that nucleotides released to the extracellular medium by electrical stimulation are partly involved in the fast component and are largely responsible for the slow signals. In rat skeletal myotubes, a tetanic stimulus (45 Hz, 400 1-ms pulses) rapidly increased extracellular levels of ATP, ADP, and AMP after 15 s to 3 min. Exogenous ATP induced an increase in intracellular free Ca(2+) concentration, with an EC(50) value of 7.8 +/- 3.1 microm. Exogenous ADP, UTP, and UDP also promoted calcium transients. Both fast and slow calcium signals evoked by tetanic stimulation were inhibited by either 100 mum suramin or 2 units/ml apyrase. Apyrase also reduced fast and slow calcium signals evoked by tetanus (45 Hz, 400 0.3-ms pulses) in isolated mouse adult skeletal fibers. A likely candidate for the ATP release pathway is the pannexin-1 hemichannel; its blockers inhibited both calcium transients and ATP release. The dihydropyridine receptor co-precipitated with both the P2Y(2) receptor and pannexin-1. As reported previously for electrical stimulation, 500 mum ATP significantly increased mRNA expression for both c-fos and interleukin 6. Our results suggest that nucleotides released during skeletal muscle activity through pannexin-1 hemichannels act through P2X and P2Y receptors to modulate both Ca(2+) homeostasis and muscle physiology.
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Affiliation(s)
- Sonja Buvinic
- Centro de Estudios Moleculares de la Célula, Facultad de Medicina, Instituto de Ciencias Biomédicas, Universidad de Chile, Casilla 70005, Santiago 7, Chile
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23
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Gedeon C, Anger G, Lubetsky A, Miller MP, Koren G. Investigating the potential role of multi-drug resistance protein (MRP) transporters in fetal to maternal glyburide efflux in the human placenta. J OBSTET GYNAECOL 2009; 28:485-9. [DOI: 10.1080/01443610802091420] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Norambuena A, Poblete MI, Donoso MV, Espinoza CS, González A, Huidobro-Toro JP. P2Y1 receptor activation elicits its partition out of membrane rafts and its rapid internalization from human blood vessels: implications for receptor signaling. Mol Pharmacol 2008; 74:1666-77. [PMID: 18799799 DOI: 10.1124/mol.108.048496] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
The nucleotide P2Y(1) receptor (P2Y(1)R) is expressed in both the endothelial and vascular smooth muscle cells; however, its plasma membrane microregionalization and internalization in human tissues remain unknown. We report on the role of membrane rafts in P2Y(1)R signaling by using sodium carbonate or OptiPrep sucrose density gradients, Western blot analysis, reduction of tissue cholesterol content, and vasomotor assays of endothelium-denuded human chorionic arteries. In tissue extracts prepared either in sodium carbonate or OptiPrep, approximately 20 to 30% of the total P2Y(1)R mass consistently partitioned into raft fractions and correlated with vasomotor activity. Vessel treatment with methyl beta-cyclodextrin reduced the raft partitioning of the P2Y(1)R and obliterated the P2Y(1)R-mediated contractions but not the vasomotor responses elicited by either serotonin or KCl. Perfusion of chorionic artery segments with 100 nM 2-methylthio ADP or 10 nM [[(1R,2R,3S,4R,5S)-4-[6-amino-2-(methylthio)-9H-purin-9-yl] 2,3dihydroxybicyclo[3.1.0]hex-1-yl]methyl] diphosphoric acid mono ester trisodium salt (MRS 2365), a selective P2Y(1)R agonist, not only displaced within 4 min the P2Y(1)R localization out of membrane rafts but also induced its subsequent internalization. 2'-Deoxy-N(6)-methyladenosine 3',5'-bisphosphate tetrasodium salt (MRS 2179), a specific P2Y(1)R antagonist, did not cause a similar displacement but blocked the agonist-induced exit from rafts. Neither adenosine nor uridine triphosphate displaced the P2Y(1)R from the membrane raft, further evidencing the pharmacodynamics of the receptor-ligand interaction. Vascular reactivity assays showed fading of the ligand-induced vasoconstrictions, a finding that correlated with the P2Y(1)R exit from raft domains and internalization. These results demonstrate in intact human vascular smooth muscle the association of the P2Y(1)R to membrane rafts, highlighting the role of this microdomain in P2Y(1)R signaling.
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Affiliation(s)
- Andrés Norambuena
- Centro de Regulación Celular y Patología, JV Luco, Instituto Milenio de Biología Fundamental y Aplicada, Pontificia Universidad Católica de Chile, Santiago, Chile
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25
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Linder AE, Tumbri M, Linder FFP, Webb RC, Leite R. Uridine adenosine tetraphosphate induces contraction and relaxation in rat aorta. Vascul Pharmacol 2008; 48:202-7. [PMID: 18467183 DOI: 10.1016/j.vph.2008.03.003] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2007] [Accepted: 03/20/2008] [Indexed: 11/25/2022]
Abstract
Uridine adenosine tetraphosphate (Up(4)A) has been recently reported as an endothelium-derived vasoconstrictor and plasma levels of this dinucleotide are increased in juvenile hypertensive subjects. This study aimed to evaluate the vascular actions of Up(4)A, typify the putative purinergic receptors that might mediate these effects and characterize the intracellular signaling pathways that may govern Up(4)A responses. Up(4)A induced a modest endothelium-dependent relaxation of rat aortic rings contracted with phenylephrine. From baseline, Up(4)A induced concentration-dependent contractions that were significantly potentiated by endothelium removal or nitric oxide synthase inhibition. The contractile response induced by Up(4)A was not tachyphylactic and was significantly reduced in the presence of P1 or P2X receptor antagonists, L-type Ca(2+) channel blocker and Rho-kinase inhibitor. Up(4)A-induced contraction apparently involves superoxide anion formation since it was significantly reduced by treatment with apocynin or tempol. This study presents the unique findings that the endogenous compound Up(4)A is able to induce relaxation in addition to contraction of rat aorta. Up(4)A-induced contraction is modulated by nitric oxide production, mediated by P1 and P2X receptor activation, and involves L-type Ca(2+) channels, Rho-kinase pathway and superoxide formation.
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Affiliation(s)
- A Elizabeth Linder
- Department of Physiology, Medical College of Georgia, Augusta, GA 30912-3000, USA
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26
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Buvinic S, Bravo-Zehnder M, Boyer JL, Huidobro-Toro JP, González A. Nucleotide P2Y1 receptor regulates EGF receptor mitogenic signaling and expression in epithelial cells. J Cell Sci 2008; 120:4289-301. [PMID: 18057028 DOI: 10.1242/jcs.03490] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
Epidermal growth factor receptor (EGFR) function is transregulated by a variety of stimuli, including agonists of certain G-protein-coupled receptors (GPCRs). One of the most ubiquitous GPCRs is the P2Y(1) receptor (P2RY1, hereafter referred to as P2Y(1)R) for extracellular nucleotides, mainly ADP. Here, we show in tumoral HeLa cells and normal FRT epithelial cells that P2Y(1)R broadcasts mitogenic signals by transactivating the EGFR. The pathway involves PKC, Src and cell surface metalloproteases. Stimulation of P2Y(1)R for as little as 15-60 minutes triggers mitogenesis, mirroring the half-life of extracellular ADP. Apyrase degradation of extracellular nucleotides and drug inhibition of P2Y(1)R, both reduced basal cell proliferation of HeLa and FRT cells, but not MDCK cells, which do not express P2Y(1)R. Thus, cell-released nucleotides constitute strong mitogenic stimuli, which act via P2Y(1)R. Strikingly, MDCK cells ectopically expressing P2Y(1)R display a highly proliferative phenotype that depends on EGFR activity associated with an increased level of EGFR, thus disclosing a novel aspect of GPCR-mediated regulation of EGFR function. These results highlight a role of P2Y(1)R in EGFR-dependent epithelial cell proliferation. P2Y(1)R could potentially mediate both trophic stimuli of basally released nucleotides and first-line mitogenic stimulation upon tissue damage. It could also contribute to carcinogenesis and serve as target for antitumor therapies.
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Affiliation(s)
- Sonja Buvinic
- Centro de Regulación Celular y Patología JV Luco, Facultad de Ciencias Biológicas, Pontificia Universidad Católica de Chile, 8330033, Santiago, Chile
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Meng F, To W, Kirkman-Brown J, Kumar P, Gu Y. Calcium oscillations induced by ATP in human umbilical cord smooth muscle cells. J Cell Physiol 2007; 213:79-87. [PMID: 17477379 DOI: 10.1002/jcp.21092] [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: 11/08/2022]
Abstract
Arterial smooth muscle cells exhibit vasomotion, related to oscillations in intracellular Ca(2+) concentration, but the origin and function of these has not yet been fully determined. We measured intracellular Ca(2+) using conventional fluorescent methods in primary cultured, human umbilical cord artery smooth muscle cells (HUCASMC). Spontaneous oscillations in Ca(2+) was found in only 1% of all cells but exogenous, micromolar concentrations of ATP could induce Ca(2+) oscillations in 70% of cells with the most common pattern being one of regular amplitude and frequency with a return to basal levels between each peak. The P2Y agonist, UTP, but not the P2X agonist alphabeta-methylene ATP, could also induce Ca(2+) oscillations. Once induced, these oscillations could not be blocked by G-protein, PLC, VGCC or TRP channel antagonists applied individually, but could be prevented when antagonists were applied together. In the presence of EGTA, micromolar concentrations of ATP induced an elevation in intracellular Ca(2+) but did not induce Ca(2+) oscillations. The oscillation frequency induced by ATP was affected by bath Ca(2+) concentration. Taken together, these data suggest that external Ca(2+) entry maintains the Ca(2+) oscillation induced by activation of P2Y receptors. Once induced, multiple mechanisms are involved to maintain the oscillation and the oscillation frequency is determined by the speed of Ca(2+) refilling. Chronic hypoxia enhanced the Ca(2+) response and altered the oscillation frequency. We suggest that these oscillations may play a role in the maintenance of umbilical blood flow during situations in which GPCR are activated.
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MESH Headings
- Adenosine Triphosphate/analogs & derivatives
- Adenosine Triphosphate/pharmacology
- Arachidonic Acid/pharmacology
- Calcium/pharmacology
- Calcium Channels/drug effects
- Calcium Channels/metabolism
- Calcium Signaling/drug effects
- Cell Hypoxia/drug effects
- Cell Hypoxia/physiology
- Cells, Cultured
- Humans
- Muscle, Smooth, Vascular/cytology
- Muscle, Smooth, Vascular/drug effects
- Muscle, Smooth, Vascular/metabolism
- Myocytes, Smooth Muscle/drug effects
- Myocytes, Smooth Muscle/metabolism
- Purinergic P2 Receptor Agonists
- Receptors, Purinergic P2/classification
- Receptors, Purinergic P2/metabolism
- Uridine Triphosphate/pharmacology
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Affiliation(s)
- Fei Meng
- Department of Physiology, School of Medicine, University of Birmingham, Edgbaston, UK
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Rayment SJ, Latif ML, Ralevic V, Alexander SPH. Evidence for the expression of multiple uracil nucleotide-stimulated P2 receptors coupled to smooth muscle contraction in porcine isolated arteries. Br J Pharmacol 2007; 150:604-12. [PMID: 17262017 PMCID: PMC2189772 DOI: 10.1038/sj.bjp.0707120] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
BACKGROUND AND PURPOSE The uracil nucleotides UDP and UTP have been reported to activate P2Y2, P2Y4 and P2Y6 receptors to cause vasoconstriction. We have performed a comparative analysis of these receptors in endothelium-denuded smooth muscle from porcine isolated coronary and ear arteries, using pharmacological and molecular tools. EXPERIMENTAL APPROACH Tissue segments were used to construct non-cumulative concentration response curves for UTP and UDP, in the absence and presence of the P2 receptor antagonists PPADS or suramin. RT-PCR and immunoblot analyses were employed to define gene expression and immunoreactivity for P2Y2, P2Y4 and P2Y6 receptors. KEY RESULTS In the coronary artery, UTP-evoked contractile responses were reduced in the presence of suramin, but not PPADS, while the smaller responses to UDP were unaffected by either antagonist. In the ear artery, contractile responses to UDP were much smaller than those to UTP; responses to UTP were inhibited by both PPADS and suramin. RT-PCR suggested predominant expression of P2Y2 receptors in the coronary artery, while P2Y4 and P2Y6 receptor gene expression appeared equivalent in both tissues. Immunoblot analyses provided evidence for P2Y6 receptors in both tissues, with equivocal evidence of P2Y2 and P2Y4 receptor immunoreactivities. CONCLUSIONS AND IMPLICATIONS We conclude that UTP-evoked contraction of porcine coronary artery smooth muscle appears to be predominantly P2Y2-mediated, while the ear artery appears to express a uracil nucleotide-sensitive P2 receptor(s) which fails to fit readily into the current classification.
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MESH Headings
- Animals
- Blotting, Western
- Coronary Vessels/metabolism
- Dose-Response Relationship, Drug
- Ear/blood supply
- Gene Expression
- In Vitro Techniques
- Muscle, Smooth, Vascular/drug effects
- Muscle, Smooth, Vascular/metabolism
- Purinergic P2 Receptor Agonists
- Pyridoxal Phosphate/analogs & derivatives
- Pyridoxal Phosphate/pharmacology
- RNA, Messenger/analysis
- Receptors, Purinergic P2/genetics
- Receptors, Purinergic P2/metabolism
- Receptors, Purinergic P2Y2
- Reverse Transcriptase Polymerase Chain Reaction
- Suramin/pharmacology
- Swine
- Uracil Nucleotides/metabolism
- Uracil Nucleotides/pharmacology
- Uridine Diphosphate/metabolism
- Uridine Triphosphate/metabolism
- Vasoconstriction/drug effects
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Affiliation(s)
- S J Rayment
- School of Biomedical Sciences, University of Nottingham Medical School, Queen's Medical Centre Nottingham, UK
| | - M L Latif
- School of Biomedical Sciences, University of Nottingham Medical School, Queen's Medical Centre Nottingham, UK
| | - V Ralevic
- School of Biomedical Sciences, University of Nottingham Medical School, Queen's Medical Centre Nottingham, UK
| | - S P H Alexander
- School of Biomedical Sciences, University of Nottingham Medical School, Queen's Medical Centre Nottingham, UK
- Author for correspondence:
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