1
|
Li KL, Shan SW, Lin FY, Ling CY, Wong NW, Li HL, Han W, To CH, Do CW. Regulation of Aqueous Humor Secretion by Melatonin in Porcine Ciliary Epithelium. Int J Mol Sci 2023; 24:5789. [PMID: 36982863 PMCID: PMC10051954 DOI: 10.3390/ijms24065789] [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: 02/08/2023] [Revised: 03/10/2023] [Accepted: 03/16/2023] [Indexed: 03/30/2023] Open
Abstract
Secretion of melatonin, a natural hormone whose receptors are present in the ciliary epithelium, displays diurnal variation in the aqueous humor (AH), potentially contributing to the regulation of intraocular pressure. This study aimed to determine the effects of melatonin on AH secretion in porcine ciliary epithelium. The addition of 100 µM melatonin to both sides of the epithelium significantly increased the short-circuit current (Isc) by ~40%. Stromal administration alone had no effect on the Isc, but aqueous application triggered a 40% increase in Isc, similar to that of bilateral application without additive effect. Pre-treatment with niflumic acid abolished melatonin-induced Isc stimulation. More importantly, melatonin stimulated the fluid secretion across the intact ciliary epithelium by ~80% and elicited a sustained increase (~50-60%) in gap junctional permeability between pigmented ciliary epithelial (PE) cells and non-pigmented ciliary epithelial (NPE) cells. The expression of MT3 receptor was found to be >10-fold higher than that of MT1 and MT2 in porcine ciliary epithelium. Aqueous pre-treatment with MT1/MT2 antagonist luzindole failed to inhibit the melatonin-induced Isc response, while MT3 antagonist prazosin pre-treatment abolished the Isc stimulation. We conclude that melatonin facilitates Cl- and fluid movement from PE to NPE cells, thereby stimulating AH secretion via NPE-cell MT3 receptors.
Collapse
Affiliation(s)
- Ka-Lok Li
- School of Optometry, The Hong Kong Polytechnic University, Hong Kong, China
| | - Sze-Wan Shan
- School of Optometry, The Hong Kong Polytechnic University, Hong Kong, China
- Centre for Eye and Vision Research (CEVR), 17W Hong Kong Science Park, Hong Kong, China
- Research Centre for SHARP Vision (RCSV), The Hong Kong Polytechnic University, Hong Kong, China
| | - Fang-Yu Lin
- School of Optometry, The Hong Kong Polytechnic University, Hong Kong, China
- Department of Ophthalmology, Zhejiang University, Hangzhou 310027, China
- Department of Ophthalmology, Emory University, Atlanta, GA 30322, USA
| | - Choi-Ying Ling
- School of Optometry, The Hong Kong Polytechnic University, Hong Kong, China
| | - Nga-Wai Wong
- School of Optometry, The Hong Kong Polytechnic University, Hong Kong, China
| | - Hoi-Lam Li
- School of Optometry, The Hong Kong Polytechnic University, Hong Kong, China
- Centre for Eye and Vision Research (CEVR), 17W Hong Kong Science Park, Hong Kong, China
| | - Wei Han
- Department of Ophthalmology, Zhejiang University, Hangzhou 310027, China
| | - Chi-Ho To
- School of Optometry, The Hong Kong Polytechnic University, Hong Kong, China
- Centre for Eye and Vision Research (CEVR), 17W Hong Kong Science Park, Hong Kong, China
- Research Centre for SHARP Vision (RCSV), The Hong Kong Polytechnic University, Hong Kong, China
| | - Chi-Wai Do
- School of Optometry, The Hong Kong Polytechnic University, Hong Kong, China
- Centre for Eye and Vision Research (CEVR), 17W Hong Kong Science Park, Hong Kong, China
- Research Centre for SHARP Vision (RCSV), The Hong Kong Polytechnic University, Hong Kong, China
- Research Institute of Smart Ageing (RISA), The Hong Kong Polytechnic University, Hong Kong, China
| |
Collapse
|
2
|
Burboa PC, Puebla M, Gaete PS, Durán WN, Lillo MA. Connexin and Pannexin Large-Pore Channels in Microcirculation and Neurovascular Coupling Function. Int J Mol Sci 2022; 23:ijms23137303. [PMID: 35806312 PMCID: PMC9266979 DOI: 10.3390/ijms23137303] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2022] [Revised: 06/27/2022] [Accepted: 06/28/2022] [Indexed: 01/27/2023] Open
Abstract
Microcirculation homeostasis depends on several channels permeable to ions and/or small molecules that facilitate the regulation of the vasomotor tone, hyperpermeability, the blood–brain barrier, and the neurovascular coupling function. Connexin (Cxs) and Pannexin (Panxs) large-pore channel proteins are implicated in several aspects of vascular physiology. The permeation of ions (i.e., Ca2+) and key metabolites (ATP, prostaglandins, D-serine, etc.) through Cxs (i.e., gap junction channels or hemichannels) and Panxs proteins plays a vital role in intercellular communication and maintaining vascular homeostasis. Therefore, dysregulation or genetic pathologies associated with these channels promote deleterious tissue consequences. This review provides an overview of current knowledge concerning the physiological role of these large-pore molecule channels in microcirculation (arterioles, capillaries, venules) and in the neurovascular coupling function.
Collapse
Affiliation(s)
- Pía C. Burboa
- Department of Pharmacology, Physiology and Neuroscience, New Jersey Medical School, Rutgers University, 185 South Orange Avenue, Newark, NJ 07103, USA; (P.C.B.); (W.N.D.)
- Departamento de Morfología y Función, Facultad de Salud y Ciencias Sociales, Sede Santiago Centro, Universidad de las Américas, Avenue República 71, Santiago 8370040, Chile;
| | - Mariela Puebla
- Departamento de Morfología y Función, Facultad de Salud y Ciencias Sociales, Sede Santiago Centro, Universidad de las Américas, Avenue República 71, Santiago 8370040, Chile;
| | - Pablo S. Gaete
- Department of Physiology and Membrane Biology, University of California at Davis, Davis, CA 95616, USA;
| | - Walter N. Durán
- Department of Pharmacology, Physiology and Neuroscience, New Jersey Medical School, Rutgers University, 185 South Orange Avenue, Newark, NJ 07103, USA; (P.C.B.); (W.N.D.)
- Rutgers School of Graduate Studies, 185 South Orange Avenue, Newark, NJ 07103, USA
| | - Mauricio A. Lillo
- Department of Pharmacology, Physiology and Neuroscience, New Jersey Medical School, Rutgers University, 185 South Orange Avenue, Newark, NJ 07103, USA; (P.C.B.); (W.N.D.)
- Correspondence:
| |
Collapse
|
3
|
Michel MC. α 1-adrenoceptor activity of β-adrenoceptor ligands - An expected drug property with limited clinical relevance. Eur J Pharmacol 2020; 889:173632. [PMID: 33038419 DOI: 10.1016/j.ejphar.2020.173632] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2020] [Revised: 09/11/2020] [Accepted: 10/02/2020] [Indexed: 12/19/2022]
Abstract
Many β-adrenoceptor agonists and antagonists including several clinically used drugs have been reported to also exhibit binding to α1-adrenoceptors. Such promiscuity within the adrenoceptor family appears to occur more often than off-target effects of drugs in general. It should not be considered surprising based on the amino acid homology among the nine adrenoceptor subtypes including the counter-ions for binding the endogenous catecholamines. When β-adrenoceptor ligands also bind to α1-adrenoceptors, they almost always act as antagonists, regardless of being agonists or antagonists at the β-adrenoceptor. The α1-adrenoceptor affinity of β-adrenoceptor ligands in most cases is at least one, and often more log units lower than at their cognate receptor. Consistent evidence from multiple investigators indicates that β-adrenoceptor ligands relatively have the highest affinity for α1A- and lowest for α1B-adrenoceptors. While promiscuity among adrenoceptor subtypes causes misleading interpretation of experimental in vitro data, it is proposed based on the law of mass action that α1-adrenoceptor binding of β-adrenoceptor ligands rarely contributes to the clinical profile of such drugs, particularly if they are agonists at the β-adrenoceptor.
Collapse
Affiliation(s)
- Martin C Michel
- Dept. of Pharmacology, Johannes Gutenberg University, Universitätsmedizin Main, Langenbeckstr. 1, 55131, Mainz, Germany.
| |
Collapse
|
4
|
Khammy MM, Truong CKH, Wright CE, Angus JA. The β 2-adrenoceptor agonist bronchodilators terbutaline and orciprenaline are also weak α 1-adrenoceptor antagonists. Eur J Pharmacol 2020; 882:173304. [PMID: 32592771 DOI: 10.1016/j.ejphar.2020.173304] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2020] [Revised: 06/11/2020] [Accepted: 06/19/2020] [Indexed: 11/16/2022]
Abstract
Recently, the β2-adrenoceptor agonist terbutaline was shown to have α1-adrenolytic activity in mouse isolated pulmonary arteries in vitro and to lower pulmonary artery pressure in anaesthetised mice. The aim of our study was to determine the α1-adrenoceptor antagonist activity of terbutaline and its structurally close resorcinol, orciprenaline, in rat isolated small mesenteric arteries set up for myography. Their α1-adrenoceptor antagonist potency was then compared with their potency as β2-adrenoceptor agonists. Concentration-response curves to methoxamine were competitively antagonised by terbutaline (30-300 μM) or orciprenaline (30-300 μM) with a pKB of 4.70 ± 0.09 or 4.79 ± 0.17, respectively. Both terbutaline and orciprenaline fulfilled the criteria for simple, silent competitive antagonism. Terbutaline (30-300 μM) had no effect on endothelin-1 concentration-contraction curves. Our findings suggest that after oral dosing of terbutaline, the maximum plasma levels would NOT reach levels to show α1-adrenoceptor antagonist activity. In conclusion, our work has provided additional quantitative evidence that terbutaline and orciprenaline are weak competitive α1-adrenoceptor antagonists, but this additional property is probably not therapeutically important in the clinical treatment of asthma or pulmonary artery hypertension with these more potent β2-adrenoceptor agonists.
Collapse
Affiliation(s)
- Makhala M Khammy
- Cardiovascular Therapeutics Unit, Department of Pharmacology and Therapeutics, University of Melbourne, Victoria, 3010, Australia.
| | - Cindy Kha Han Truong
- Cardiovascular Therapeutics Unit, Department of Pharmacology and Therapeutics, University of Melbourne, Victoria, 3010, Australia.
| | - Christine E Wright
- Cardiovascular Therapeutics Unit, Department of Pharmacology and Therapeutics, University of Melbourne, Victoria, 3010, Australia.
| | - James A Angus
- Cardiovascular Therapeutics Unit, Department of Pharmacology and Therapeutics, University of Melbourne, Victoria, 3010, Australia.
| |
Collapse
|
5
|
DeLalio LJ, Billaud M, Ruddiman CA, Johnstone SR, Butcher JT, Wolpe AG, Jin X, Keller TCS, Keller AS, Rivière T, Good ME, Best AK, Lohman AW, Swayne LA, Penuela S, Thompson RJ, Lampe PD, Yeager M, Isakson BE. Constitutive SRC-mediated phosphorylation of pannexin 1 at tyrosine 198 occurs at the plasma membrane. J Biol Chem 2019; 294:6940-6956. [PMID: 30814251 DOI: 10.1074/jbc.ra118.006982] [Citation(s) in RCA: 42] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2018] [Revised: 02/15/2019] [Indexed: 11/06/2022] Open
Abstract
Pannexin 1 (PANX1)-mediated ATP release in vascular smooth muscle coordinates α1-adrenergic receptor (α1-AR) vasoconstriction and blood pressure homeostasis. We recently identified amino acids 198-200 (YLK) on the PANX1 intracellular loop that are critical for α1-AR-mediated vasoconstriction and PANX1 channel function. We report herein that the YLK motif is contained within an SRC homology 2 domain and is directly phosphorylated by SRC proto-oncogene, nonreceptor tyrosine kinase (SRC) at Tyr198 We demonstrate that PANX1-mediated ATP release occurs independently of intracellular calcium but is sensitive to SRC family kinase (SFK) inhibition, suggestive of channel regulation by tyrosine phosphorylation. Using a PANX1 Tyr198-specific antibody, SFK inhibitors, SRC knockdown, temperature-dependent SRC cells, and kinase assays, we found that PANX1-mediated ATP release and vasoconstriction involves constitutive phosphorylation of PANX1 Tyr198 by SRC. We specifically detected SRC-mediated Tyr198 phosphorylation at the plasma membrane and observed that it is not enhanced or induced by α1-AR activation. Last, we show that PANX1 immunostaining is enriched in the smooth muscle layer of arteries from hypertensive humans and that Tyr198 phosphorylation is detectable in these samples, indicative of a role for membrane-associated PANX1 in small arteries of hypertensive humans. Our discovery adds insight into the regulation of PANX1 by post-translational modifications and connects a significant purinergic vasoconstriction pathway with a previously identified, yet unexplored, tyrosine kinase-based α1-AR constriction mechanism. This work implicates SRC-mediated PANX1 function in normal vascular hemodynamics and suggests that Tyr198-phosphorylated PANX1 is involved in hypertensive vascular pathology.
Collapse
Affiliation(s)
- Leon J DeLalio
- From the Robert M. Berne Cardiovascular Research Center.,Department of Pharmacology
| | - Marie Billaud
- the Department of Cardiothoracic Surgery, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania 15213
| | - Claire A Ruddiman
- From the Robert M. Berne Cardiovascular Research Center.,Department of Pharmacology
| | | | - Joshua T Butcher
- the Department of Physiology, Augusta University, Augusta, Georgia 30912
| | - Abigail G Wolpe
- From the Robert M. Berne Cardiovascular Research Center.,Department of Cell Biology, and
| | - Xueyao Jin
- Department of Molecular Physiology and Biophysics, University of Virginia School of Medicine, Charlottesville, Virginia 22908
| | - T C Stevenson Keller
- From the Robert M. Berne Cardiovascular Research Center.,Department of Molecular Physiology and Biophysics, University of Virginia School of Medicine, Charlottesville, Virginia 22908
| | - Alexander S Keller
- From the Robert M. Berne Cardiovascular Research Center.,Department of Pharmacology
| | - Thibaud Rivière
- the Department of Life and Health Sciences, University of Bordeaux, 33000 Bordeaux, France
| | | | - Angela K Best
- From the Robert M. Berne Cardiovascular Research Center
| | - Alexander W Lohman
- the Hotchkiss Brain Institute and.,Department of Cell Biology and Anatomy, University of Calgary, Calgary, Alberta T2N 4N1, Canada
| | - Leigh Anne Swayne
- the Division of Medical Sciences, Centre for Biomedical Research, University of Victoria, Victoria, British Columbia V8P 5C2, Canada
| | - Silvia Penuela
- the Departments of Anatomy and Cell Biology and Oncology, Schulich School of Medicine and Dentistry, University of Western Ontario, London, Ontario N6A 3K7, Canada, and
| | - Roger J Thompson
- the Hotchkiss Brain Institute and.,Department of Cell Biology and Anatomy, University of Calgary, Calgary, Alberta T2N 4N1, Canada
| | - Paul D Lampe
- the Fred Hutchinson Cancer Research Center, Seattle, Washington 98109
| | - Mark Yeager
- Department of Molecular Physiology and Biophysics, University of Virginia School of Medicine, Charlottesville, Virginia 22908
| | - Brant E Isakson
- From the Robert M. Berne Cardiovascular Research Center, .,Department of Molecular Physiology and Biophysics, University of Virginia School of Medicine, Charlottesville, Virginia 22908
| |
Collapse
|
6
|
DeLalio LJ, Keller AS, Chen J, Boyce AK, Artamonov M, Askew-Page HR, Keller TS, Johnstone SR, Weaver RB, Good ME, Murphy S, Best AK, Mintz EL, Penuela S, Greenwood I, Machado RF, Somlyo AV, Swayne LA, Minshall R, Isakson BE. Interaction Between Pannexin 1 and Caveolin-1 in Smooth Muscle Can Regulate Blood Pressure. Arterioscler Thromb Vasc Biol 2018; 38:2065-2078. [PMID: 30026274 PMCID: PMC6202122 DOI: 10.1161/atvbaha.118.311290] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2017] [Accepted: 06/19/2018] [Indexed: 12/31/2022]
Abstract
Objective- Sympathetic nerve innervation of vascular smooth muscle cells (VSMCs) is a major regulator of arteriolar vasoconstriction, vascular resistance, and blood pressure. Importantly, α-adrenergic receptor stimulation, which uniquely couples with Panx1 (pannexin 1) channel-mediated ATP release in resistance arteries, also requires localization to membrane caveolae. Here, we test whether localization of Panx1 to Cav1 (caveolin-1) promotes channel function (stimulus-dependent ATP release and adrenergic vasoconstriction) and is important for blood pressure homeostasis. Approach and Results- We use in vitro VSMC culture models, ex vivo resistance arteries, and a novel inducible VSMC-specific Cav1 knockout mouse to probe interactions between Panx1 and Cav1. We report that Panx1 and Cav1 colocalized on the VSMC plasma membrane of resistance arteries near sympathetic nerves in an adrenergic stimulus-dependent manner. Genetic deletion of Cav1 significantly blunts adrenergic-stimulated ATP release and vasoconstriction, with no direct influence on endothelium-dependent vasodilation or cardiac function. A significant reduction in mean arterial pressure (total=4 mm Hg; night=7 mm Hg) occurred in mice deficient for VSMC Cav1. These animals were resistant to further blood pressure lowering using a Panx1 peptide inhibitor Px1IL2P, which targets an intracellular loop region necessary for channel function. Conclusions- Translocalization of Panx1 to Cav1-enriched caveolae in VSMCs augments the release of purinergic stimuli necessary for proper adrenergic-mediated vasoconstriction and blood pressure homeostasis.
Collapse
Affiliation(s)
- Leon J. DeLalio
- Robert M. Berne Cardiovascular Research Center, University of Virginia School of Medicine, Charlottesville, VA
- Department of Pharmacology, University of Virginia School of Medicine, Charlottesville, VA
| | - Alexander S. Keller
- Robert M. Berne Cardiovascular Research Center, University of Virginia School of Medicine, Charlottesville, VA
- Department of Pharmacology, University of Virginia School of Medicine, Charlottesville, VA
| | - Jiwang Chen
- Department of Medicine, The University of Illinois at Chicago, Chicago, IL
| | - Andrew K.J. Boyce
- Division of Medical Sciences, Centre for Biomedical Research, University of Victoria, Victoria, BC Canada
| | - Mykhaylo Artamonov
- Department of Molecular Physiology and Biophysics, University of Virginia, Charlottesville, VA
| | - Henry R. Askew-Page
- Robert M. Berne Cardiovascular Research Center, University of Virginia School of Medicine, Charlottesville, VA
| | - T.C. Stevenson Keller
- Robert M. Berne Cardiovascular Research Center, University of Virginia School of Medicine, Charlottesville, VA
- Department of Molecular Physiology and Biophysics, University of Virginia, Charlottesville, VA
| | - Scott R. Johnstone
- Robert M. Berne Cardiovascular Research Center, University of Virginia School of Medicine, Charlottesville, VA
| | - Rachel B. Weaver
- Robert M. Berne Cardiovascular Research Center, University of Virginia School of Medicine, Charlottesville, VA
| | - Miranda E. Good
- Robert M. Berne Cardiovascular Research Center, University of Virginia School of Medicine, Charlottesville, VA
| | - Sara Murphy
- Robert M. Berne Cardiovascular Research Center, University of Virginia School of Medicine, Charlottesville, VA
| | - Angela K. Best
- Robert M. Berne Cardiovascular Research Center, University of Virginia School of Medicine, Charlottesville, VA
| | - Ellen L. Mintz
- Department of Biomedical Engineering, University of Virginia School of Engineering, Charlottesville, VA
| | - Silvia Penuela
- Department of Anatomy and Cell Biology, Schulich Scholl of Medicine and Dentistry, University of Western Ontario, London ON, Canada
| | - Iain Greenwood
- Molecular and Clinical Sciences Research Institute, St. George’s University London UK
| | - Roberto F. Machado
- Division of Pulmonary, Critical Care, Sleep, & Occupational Medicine, Indiana University School of Medicine, Indianapolis, IN
| | - Avril V. Somlyo
- Department of Molecular Physiology and Biophysics, University of Virginia, Charlottesville, VA
| | - Leigh Anne Swayne
- Division of Medical Sciences, Centre for Biomedical Research, University of Victoria, Victoria, BC Canada
| | - Richard Minshall
- Department of Pharmacology and Department of Anesthesiology, The University of Illinois at Chicago, Chicago, IL
| | - Brant E. Isakson
- Robert M. Berne Cardiovascular Research Center, University of Virginia School of Medicine, Charlottesville, VA
- Department of Molecular Physiology and Biophysics, University of Virginia, Charlottesville, VA
| |
Collapse
|
7
|
Molica F, Figueroa XF, Kwak BR, Isakson BE, Gibbins JM. Connexins and Pannexins in Vascular Function and Disease. Int J Mol Sci 2018; 19:ijms19061663. [PMID: 29874791 PMCID: PMC6032213 DOI: 10.3390/ijms19061663] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2018] [Revised: 05/28/2018] [Accepted: 05/31/2018] [Indexed: 12/24/2022] Open
Abstract
Connexins (Cxs) and pannexins (Panxs) are ubiquitous membrane channel forming proteins that are critically involved in many aspects of vascular physiology and pathology. The permeation of ions and small metabolites through Panx channels, Cx hemichannels and gap junction channels confers a crucial role to these proteins in intercellular communication and in maintaining tissue homeostasis. This review provides an overview of current knowledge with respect to the pathophysiological role of these channels in large arteries, the microcirculation, veins, the lymphatic system and platelet function. The essential nature of these membrane proteins in vascular homeostasis is further emphasized by the pathologies that are linked to mutations and polymorphisms in Cx and Panx genes.
Collapse
Affiliation(s)
- Filippo Molica
- Department of Pathology and Immunology, University of Geneva, CH-1211 Geneva, Switzerland.
| | - Xavier F Figueroa
- Departamento de Fisiología, Faculdad de Ciencias Biológicas, Pontifica Universidad Católica de Chile, Santiago 8330025, Chile.
| | - Brenda R Kwak
- Department of Pathology and Immunology, University of Geneva, CH-1211 Geneva, Switzerland.
| | - 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 22908, USA.
| | - Jonathan M Gibbins
- Institute for Cardiovascular & Metabolic Research, School of Biological Sciences, Harborne Building, University of Reading, Reading RG6 6AS, UK.
| |
Collapse
|
8
|
Angus JA, Wright CE. Letter by Angus and Wright Regarding Article, “Pannexin-1 Channels as an Unexpected New Target of the Antihypertensive Drug Spironolactone”. Circ Res 2018; 122:e86-e87. [DOI: 10.1161/circresaha.118.313062] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Affiliation(s)
- James A. Angus
- Cardiovascular Therapeutics Unit, Department of Pharmacology and Therapeutics, University of Melbourne, Victoria, Australia
| | - Christine E. Wright
- Cardiovascular Therapeutics Unit, Department of Pharmacology and Therapeutics, University of Melbourne, Victoria, Australia
| |
Collapse
|
9
|
Good ME, Chiu YH, Poon IKH, Jaffe IZ, Bayliss DA, Isakson BE, Ravichandran KS. Response by Good et al to Letter Regarding Article, "Pannexin-1 Channels as an Unexpected New Target of the Antihypertensive Drug Spironolactone". Circ Res 2018; 122:e88-e89. [PMID: 29798905 DOI: 10.1161/circresaha.118.313080] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Affiliation(s)
- Miranda E Good
- Department of Molecular Physiology and Biophysics, Robert M. Berne Cardiovascular Research Center, University of Virginia School of Medicine, Charlottesville
| | - Yu-Hsin Chiu
- Department of Pharmacology, University of Virginia School of Medicine, Charlottesville
| | - Ivan K H Poon
- Department of Biochemistry and Genetics, La Trobe University, Melbourne, Australia
| | - Iris Z Jaffe
- Molecular Cardiology Research Institute, Tufts Medical Center, Boston, MA
| | - Douglas A Bayliss
- Department of Pharmacology, University of Virginia School of Medicine, Charlottesville
| | - Brant E Isakson
- Department of Molecular Physiology and Biophysics, Robert M. Berne Cardiovascular Research Center, University of Virginia School of Medicine, Charlottesville
| | - Kodi S Ravichandran
- Department of Microbiology, Immunology, and Cancer Biology, University of Virginia School of Medicine, Charlottesville
| |
Collapse
|
10
|
Garg C, Seo JH, Ramachandran J, Loh JM, Calderon F, Contreras JE. Trovafloxacin attenuates neuroinflammation and improves outcome after traumatic brain injury in mice. J Neuroinflammation 2018; 15:42. [PMID: 29439712 PMCID: PMC5812039 DOI: 10.1186/s12974-018-1069-9] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2017] [Accepted: 01/17/2018] [Indexed: 12/20/2022] Open
Abstract
Background Trovafloxacin is a broad-spectrum antibiotic, recently identified as an inhibitor of pannexin-1 (Panx1) channels. Panx1 channels are important conduits for the adenosine triphosphate (ATP) release from live and dying cells that enhances the inflammatory response of immune cells. Elevated extracellular levels ATP released upon injury activate purinergic pathways in inflammatory cells that promote migration, proliferation, phagocytosis, and apoptotic signals. Here, we tested whether trovafloxacin administration attenuates the neuroinflammatory response and improves outcomes after brain trauma. Methods The murine controlled cortical impact (CCI) model was used to determine whether in vivo delivery of trovafloxacin has anti-inflammatory and neuroprotective actions after brain trauma. Locomotor deficit was assessed using the rotarod test. Levels of tissue damage markers and inflammation were measured using western blot, qPCR, and immunofluorescence. In vitro assays were used to evaluate whether trovafloxacin blocks ATP release and cell migration in a chemotactic-stimulated microglia cell line. Results Trovafloxacin treatment of CCI-injured mice significantly reduced tissue damage markers and improved locomotor deficits. In addition, trovafloxacin treatment significantly reduced mRNA levels of several pro-inflammatory cytokines (IL-1β, IL-6, and TNF-α), which correlates with an overall reduction in the accumulation of inflammatory cell types (neutrophils, microglia/macrophages, and astroglia) at the injury zone. To determine whether trovafloxacin exerted these effects by direct action on immune cells, we evaluated its effect on ATP release and cell migration using a chemotactic-stimulated microglial cell line. We found that trovafloxacin significantly inhibited both ATP release and migration of these cells. Conclusion Our results show that trovafloxacin administration has pronounced anti-inflammatory and neuroprotective effects following brain injury. These findings lay the foundation for future studies to directly test a role for Panx1 channels in pathological inflammation following brain trauma. Electronic supplementary material The online version of this article (10.1186/s12974-018-1069-9) contains supplementary material, which is available to authorized users.
Collapse
Affiliation(s)
- Charu Garg
- Department of Pharmacology, Physiology and Neurosciences, New Jersey Medical School, Rutgers University, 185 South Orange Ave, Newark, NJ, 07103, USA
| | - Joon Ho Seo
- Department of Pharmacology, Physiology and Neurosciences, New Jersey Medical School, Rutgers University, 185 South Orange Ave, Newark, NJ, 07103, USA
| | - Jayalakshmi Ramachandran
- Department of Pharmacology, Physiology and Neurosciences, New Jersey Medical School, Rutgers University, 185 South Orange Ave, Newark, NJ, 07103, USA
| | - Ji Meng Loh
- Department of Mathematical Sciences, New Jersey Institute of Technology, University Heights, Newark, NJ, 07102, USA
| | - Frances Calderon
- Department of Pharmacology, Physiology and Neurosciences, New Jersey Medical School, Rutgers University, 185 South Orange Ave, Newark, NJ, 07103, USA.
| | - Jorge E Contreras
- Department of Pharmacology, Physiology and Neurosciences, New Jersey Medical School, Rutgers University, 185 South Orange Ave, Newark, NJ, 07103, USA.
| |
Collapse
|
11
|
Nyberg M, Piil P, Kiehn OT, Maagaard C, Jørgensen TS, Egelund J, Isakson BE, Nielsen MS, Gliemann L, Hellsten Y. Probenecid Inhibits α-Adrenergic Receptor-Mediated Vasoconstriction in the Human Leg Vasculature. Hypertension 2018; 71:151-159. [PMID: 29084879 PMCID: PMC5876717 DOI: 10.1161/hypertensionaha.117.10251] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2017] [Revised: 09/11/2017] [Accepted: 10/09/2017] [Indexed: 01/07/2023]
Abstract
Coordination of vascular smooth muscle cell tone in resistance arteries plays an essential role in the regulation of peripheral resistance and overall blood pressure. Recent observations in animals have provided evidence for a coupling between adrenoceptors and Panx1 (pannexin-1) channels in the regulation of sympathetic nervous control of peripheral vascular resistance and blood pressure; however, evidence for a functional coupling in humans is lacking. We determined Panx1 expression and effects of treatment with the pharmacological Panx1 channel inhibitor probenecid on the vasoconstrictor response to α1- and α2-adrenergic receptor stimulation in the human forearm and leg vasculature of young healthy male subjects (23±3 years). By use of immunolabeling and confocal microscopy, Panx1 channels were found to be expressed in vascular smooth muscle cells of arterioles in human leg skeletal muscle. Probenecid treatment increased (P<0.05) leg vascular conductance at baseline by ≈15% and attenuated (P<0.05) the leg vasoconstrictor response to arterial infusion of tyramine (α1- and α2-adrenergic receptor stimulation) by ≈15%, whereas the response to the α1-agonist phenylephrine was unchanged. Inhibition of α1-adrenoceptors prevented the probenecid-induced increase in baseline leg vascular conductance, but did not alter the effect of probenecid on the vascular response to tyramine. No differences with probenecid treatment were detected in the forearm. These observations provide the first line of evidence in humans for a functional role of Panx1 channels in setting resting tone via α1-adrenoceptors and in the constrictive effect of noradrenaline via α2-adrenoceptors, thereby contributing to the regulation of peripheral vascular resistance and blood pressure in humans.
Collapse
Affiliation(s)
- Michael Nyberg
- From the Department of Nutrition, Exercise and Sports (M.N., P.P., O.T.K., C.M., T.S.J., J.E., L.G., Y.H.) and Department of Biomedical Sciences, Faculty of Health and Medical Sciences (M.S.N.), University of Copenhagen, Denmark; Department of Orthopedics, Herlev and Gentofte Hospital, Hellerup, Denmark (T.S.J.); and Department of Molecular Physiology and Biological Physics, University of Virginia School of Medicine, Charlottesville (B.E.I.)
| | - Peter Piil
- From the Department of Nutrition, Exercise and Sports (M.N., P.P., O.T.K., C.M., T.S.J., J.E., L.G., Y.H.) and Department of Biomedical Sciences, Faculty of Health and Medical Sciences (M.S.N.), University of Copenhagen, Denmark; Department of Orthopedics, Herlev and Gentofte Hospital, Hellerup, Denmark (T.S.J.); and Department of Molecular Physiology and Biological Physics, University of Virginia School of Medicine, Charlottesville (B.E.I.)
| | - Oliver T Kiehn
- From the Department of Nutrition, Exercise and Sports (M.N., P.P., O.T.K., C.M., T.S.J., J.E., L.G., Y.H.) and Department of Biomedical Sciences, Faculty of Health and Medical Sciences (M.S.N.), University of Copenhagen, Denmark; Department of Orthopedics, Herlev and Gentofte Hospital, Hellerup, Denmark (T.S.J.); and Department of Molecular Physiology and Biological Physics, University of Virginia School of Medicine, Charlottesville (B.E.I.)
| | - Christian Maagaard
- From the Department of Nutrition, Exercise and Sports (M.N., P.P., O.T.K., C.M., T.S.J., J.E., L.G., Y.H.) and Department of Biomedical Sciences, Faculty of Health and Medical Sciences (M.S.N.), University of Copenhagen, Denmark; Department of Orthopedics, Herlev and Gentofte Hospital, Hellerup, Denmark (T.S.J.); and Department of Molecular Physiology and Biological Physics, University of Virginia School of Medicine, Charlottesville (B.E.I.)
| | - Tue S Jørgensen
- From the Department of Nutrition, Exercise and Sports (M.N., P.P., O.T.K., C.M., T.S.J., J.E., L.G., Y.H.) and Department of Biomedical Sciences, Faculty of Health and Medical Sciences (M.S.N.), University of Copenhagen, Denmark; Department of Orthopedics, Herlev and Gentofte Hospital, Hellerup, Denmark (T.S.J.); and Department of Molecular Physiology and Biological Physics, University of Virginia School of Medicine, Charlottesville (B.E.I.)
| | - Jon Egelund
- From the Department of Nutrition, Exercise and Sports (M.N., P.P., O.T.K., C.M., T.S.J., J.E., L.G., Y.H.) and Department of Biomedical Sciences, Faculty of Health and Medical Sciences (M.S.N.), University of Copenhagen, Denmark; Department of Orthopedics, Herlev and Gentofte Hospital, Hellerup, Denmark (T.S.J.); and Department of Molecular Physiology and Biological Physics, University of Virginia School of Medicine, Charlottesville (B.E.I.)
| | - Brant E Isakson
- From the Department of Nutrition, Exercise and Sports (M.N., P.P., O.T.K., C.M., T.S.J., J.E., L.G., Y.H.) and Department of Biomedical Sciences, Faculty of Health and Medical Sciences (M.S.N.), University of Copenhagen, Denmark; Department of Orthopedics, Herlev and Gentofte Hospital, Hellerup, Denmark (T.S.J.); and Department of Molecular Physiology and Biological Physics, University of Virginia School of Medicine, Charlottesville (B.E.I.)
| | - Morten S Nielsen
- From the Department of Nutrition, Exercise and Sports (M.N., P.P., O.T.K., C.M., T.S.J., J.E., L.G., Y.H.) and Department of Biomedical Sciences, Faculty of Health and Medical Sciences (M.S.N.), University of Copenhagen, Denmark; Department of Orthopedics, Herlev and Gentofte Hospital, Hellerup, Denmark (T.S.J.); and Department of Molecular Physiology and Biological Physics, University of Virginia School of Medicine, Charlottesville (B.E.I.)
| | - Lasse Gliemann
- From the Department of Nutrition, Exercise and Sports (M.N., P.P., O.T.K., C.M., T.S.J., J.E., L.G., Y.H.) and Department of Biomedical Sciences, Faculty of Health and Medical Sciences (M.S.N.), University of Copenhagen, Denmark; Department of Orthopedics, Herlev and Gentofte Hospital, Hellerup, Denmark (T.S.J.); and Department of Molecular Physiology and Biological Physics, University of Virginia School of Medicine, Charlottesville (B.E.I.)
| | - Ylva Hellsten
- From the Department of Nutrition, Exercise and Sports (M.N., P.P., O.T.K., C.M., T.S.J., J.E., L.G., Y.H.) and Department of Biomedical Sciences, Faculty of Health and Medical Sciences (M.S.N.), University of Copenhagen, Denmark; Department of Orthopedics, Herlev and Gentofte Hospital, Hellerup, Denmark (T.S.J.); and Department of Molecular Physiology and Biological Physics, University of Virginia School of Medicine, Charlottesville (B.E.I.).
| |
Collapse
|
12
|
Good ME, Chiu YH, Poon IKH, Medina CB, Butcher JT, Mendu SK, DeLalio LJ, Lohman AW, Leitinger N, Barrett E, Lorenz UM, Desai BN, Jaffe IZ, Bayliss DA, Isakson BE, Ravichandran KS. Pannexin 1 Channels as an Unexpected New Target of the Anti-Hypertensive Drug Spironolactone. Circ Res 2017; 122:606-615. [PMID: 29237722 DOI: 10.1161/circresaha.117.312380] [Citation(s) in RCA: 70] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/12/2017] [Revised: 12/06/2017] [Accepted: 12/12/2017] [Indexed: 12/16/2022]
Abstract
RATIONALE Resistant hypertension is a major health concern with unknown cause. Spironolactone is an effective antihypertensive drug, especially for patients with resistant hypertension, and is considered by the World Health Organization as an essential medication. Although spironolactone can act at the mineralocorticoid receptor (MR; NR3C2), there is increasing evidence of MR-independent effects of spironolactone. OBJECTIVE Here, we detail the unexpected discovery that Panx1 (pannexin 1) channels could be a relevant in vivo target of spironolactone. METHODS AND RESULTS First, we identified spironolactone as a potent inhibitor of Panx1 in an unbiased small molecule screen, which was confirmed by electrophysiological analysis. Next, spironolactone inhibited α-adrenergic vasoconstriction in arterioles from mice and hypertensive humans, an effect dependent on smooth muscle Panx1, but independent of the MR NR3C2. Last, spironolactone acutely lowered blood pressure, which was dependent on smooth muscle cell expression of Panx1 and independent of NR3C2. This effect, however, was restricted to steroidal MR antagonists as a nonsteroidal MR antagonist failed to reduced blood pressure. CONCLUSIONS These data suggest new therapeutic modalities for resistant hypertension based on Panx1 inhibition.
Collapse
Affiliation(s)
- Miranda E Good
- From the Department of Molecular Physiology and Biophysics, Robert M. Berne Cardiovascular Research Center (M.E.G., J.T.B., L.J.D., A.W.L., B.E.I.), Department of Pharmacology (Y.-H.C., S.K.M., N.L., B.N.D., D.A.B.), Department of Microbiology, Immunology and Cancer Biology, the Center for Cell Clearance, and the Beirne B. Carter Center for Immunology Research (C.B.M., U.M.L., K.S.R.), and Division of Endocrinology (E.B.), University of Virginia School of Medicine, Charlottesville; Department of Biochemistry and Genetics, La Trobe University, Melbourne, Australia (I.K.H.P.); and Molecular Cardiology Research Institute, Tufts Medical Center, Boston, MA (I.Z.J.)
| | - Yu-Hsin Chiu
- From the Department of Molecular Physiology and Biophysics, Robert M. Berne Cardiovascular Research Center (M.E.G., J.T.B., L.J.D., A.W.L., B.E.I.), Department of Pharmacology (Y.-H.C., S.K.M., N.L., B.N.D., D.A.B.), Department of Microbiology, Immunology and Cancer Biology, the Center for Cell Clearance, and the Beirne B. Carter Center for Immunology Research (C.B.M., U.M.L., K.S.R.), and Division of Endocrinology (E.B.), University of Virginia School of Medicine, Charlottesville; Department of Biochemistry and Genetics, La Trobe University, Melbourne, Australia (I.K.H.P.); and Molecular Cardiology Research Institute, Tufts Medical Center, Boston, MA (I.Z.J.)
| | - Ivan K H Poon
- From the Department of Molecular Physiology and Biophysics, Robert M. Berne Cardiovascular Research Center (M.E.G., J.T.B., L.J.D., A.W.L., B.E.I.), Department of Pharmacology (Y.-H.C., S.K.M., N.L., B.N.D., D.A.B.), Department of Microbiology, Immunology and Cancer Biology, the Center for Cell Clearance, and the Beirne B. Carter Center for Immunology Research (C.B.M., U.M.L., K.S.R.), and Division of Endocrinology (E.B.), University of Virginia School of Medicine, Charlottesville; Department of Biochemistry and Genetics, La Trobe University, Melbourne, Australia (I.K.H.P.); and Molecular Cardiology Research Institute, Tufts Medical Center, Boston, MA (I.Z.J.)
| | - Christopher B Medina
- From the Department of Molecular Physiology and Biophysics, Robert M. Berne Cardiovascular Research Center (M.E.G., J.T.B., L.J.D., A.W.L., B.E.I.), Department of Pharmacology (Y.-H.C., S.K.M., N.L., B.N.D., D.A.B.), Department of Microbiology, Immunology and Cancer Biology, the Center for Cell Clearance, and the Beirne B. Carter Center for Immunology Research (C.B.M., U.M.L., K.S.R.), and Division of Endocrinology (E.B.), University of Virginia School of Medicine, Charlottesville; Department of Biochemistry and Genetics, La Trobe University, Melbourne, Australia (I.K.H.P.); and Molecular Cardiology Research Institute, Tufts Medical Center, Boston, MA (I.Z.J.)
| | - Joshua T Butcher
- From the Department of Molecular Physiology and Biophysics, Robert M. Berne Cardiovascular Research Center (M.E.G., J.T.B., L.J.D., A.W.L., B.E.I.), Department of Pharmacology (Y.-H.C., S.K.M., N.L., B.N.D., D.A.B.), Department of Microbiology, Immunology and Cancer Biology, the Center for Cell Clearance, and the Beirne B. Carter Center for Immunology Research (C.B.M., U.M.L., K.S.R.), and Division of Endocrinology (E.B.), University of Virginia School of Medicine, Charlottesville; Department of Biochemistry and Genetics, La Trobe University, Melbourne, Australia (I.K.H.P.); and Molecular Cardiology Research Institute, Tufts Medical Center, Boston, MA (I.Z.J.)
| | - Suresh K Mendu
- From the Department of Molecular Physiology and Biophysics, Robert M. Berne Cardiovascular Research Center (M.E.G., J.T.B., L.J.D., A.W.L., B.E.I.), Department of Pharmacology (Y.-H.C., S.K.M., N.L., B.N.D., D.A.B.), Department of Microbiology, Immunology and Cancer Biology, the Center for Cell Clearance, and the Beirne B. Carter Center for Immunology Research (C.B.M., U.M.L., K.S.R.), and Division of Endocrinology (E.B.), University of Virginia School of Medicine, Charlottesville; Department of Biochemistry and Genetics, La Trobe University, Melbourne, Australia (I.K.H.P.); and Molecular Cardiology Research Institute, Tufts Medical Center, Boston, MA (I.Z.J.)
| | - Leon J DeLalio
- From the Department of Molecular Physiology and Biophysics, Robert M. Berne Cardiovascular Research Center (M.E.G., J.T.B., L.J.D., A.W.L., B.E.I.), Department of Pharmacology (Y.-H.C., S.K.M., N.L., B.N.D., D.A.B.), Department of Microbiology, Immunology and Cancer Biology, the Center for Cell Clearance, and the Beirne B. Carter Center for Immunology Research (C.B.M., U.M.L., K.S.R.), and Division of Endocrinology (E.B.), University of Virginia School of Medicine, Charlottesville; Department of Biochemistry and Genetics, La Trobe University, Melbourne, Australia (I.K.H.P.); and Molecular Cardiology Research Institute, Tufts Medical Center, Boston, MA (I.Z.J.)
| | - Alexander W Lohman
- From the Department of Molecular Physiology and Biophysics, Robert M. Berne Cardiovascular Research Center (M.E.G., J.T.B., L.J.D., A.W.L., B.E.I.), Department of Pharmacology (Y.-H.C., S.K.M., N.L., B.N.D., D.A.B.), Department of Microbiology, Immunology and Cancer Biology, the Center for Cell Clearance, and the Beirne B. Carter Center for Immunology Research (C.B.M., U.M.L., K.S.R.), and Division of Endocrinology (E.B.), University of Virginia School of Medicine, Charlottesville; Department of Biochemistry and Genetics, La Trobe University, Melbourne, Australia (I.K.H.P.); and Molecular Cardiology Research Institute, Tufts Medical Center, Boston, MA (I.Z.J.)
| | - Norbert Leitinger
- From the Department of Molecular Physiology and Biophysics, Robert M. Berne Cardiovascular Research Center (M.E.G., J.T.B., L.J.D., A.W.L., B.E.I.), Department of Pharmacology (Y.-H.C., S.K.M., N.L., B.N.D., D.A.B.), Department of Microbiology, Immunology and Cancer Biology, the Center for Cell Clearance, and the Beirne B. Carter Center for Immunology Research (C.B.M., U.M.L., K.S.R.), and Division of Endocrinology (E.B.), University of Virginia School of Medicine, Charlottesville; Department of Biochemistry and Genetics, La Trobe University, Melbourne, Australia (I.K.H.P.); and Molecular Cardiology Research Institute, Tufts Medical Center, Boston, MA (I.Z.J.)
| | - Eugene Barrett
- From the Department of Molecular Physiology and Biophysics, Robert M. Berne Cardiovascular Research Center (M.E.G., J.T.B., L.J.D., A.W.L., B.E.I.), Department of Pharmacology (Y.-H.C., S.K.M., N.L., B.N.D., D.A.B.), Department of Microbiology, Immunology and Cancer Biology, the Center for Cell Clearance, and the Beirne B. Carter Center for Immunology Research (C.B.M., U.M.L., K.S.R.), and Division of Endocrinology (E.B.), University of Virginia School of Medicine, Charlottesville; Department of Biochemistry and Genetics, La Trobe University, Melbourne, Australia (I.K.H.P.); and Molecular Cardiology Research Institute, Tufts Medical Center, Boston, MA (I.Z.J.)
| | - Ulrike M Lorenz
- From the Department of Molecular Physiology and Biophysics, Robert M. Berne Cardiovascular Research Center (M.E.G., J.T.B., L.J.D., A.W.L., B.E.I.), Department of Pharmacology (Y.-H.C., S.K.M., N.L., B.N.D., D.A.B.), Department of Microbiology, Immunology and Cancer Biology, the Center for Cell Clearance, and the Beirne B. Carter Center for Immunology Research (C.B.M., U.M.L., K.S.R.), and Division of Endocrinology (E.B.), University of Virginia School of Medicine, Charlottesville; Department of Biochemistry and Genetics, La Trobe University, Melbourne, Australia (I.K.H.P.); and Molecular Cardiology Research Institute, Tufts Medical Center, Boston, MA (I.Z.J.)
| | - Bimal N Desai
- From the Department of Molecular Physiology and Biophysics, Robert M. Berne Cardiovascular Research Center (M.E.G., J.T.B., L.J.D., A.W.L., B.E.I.), Department of Pharmacology (Y.-H.C., S.K.M., N.L., B.N.D., D.A.B.), Department of Microbiology, Immunology and Cancer Biology, the Center for Cell Clearance, and the Beirne B. Carter Center for Immunology Research (C.B.M., U.M.L., K.S.R.), and Division of Endocrinology (E.B.), University of Virginia School of Medicine, Charlottesville; Department of Biochemistry and Genetics, La Trobe University, Melbourne, Australia (I.K.H.P.); and Molecular Cardiology Research Institute, Tufts Medical Center, Boston, MA (I.Z.J.)
| | - Iris Z Jaffe
- From the Department of Molecular Physiology and Biophysics, Robert M. Berne Cardiovascular Research Center (M.E.G., J.T.B., L.J.D., A.W.L., B.E.I.), Department of Pharmacology (Y.-H.C., S.K.M., N.L., B.N.D., D.A.B.), Department of Microbiology, Immunology and Cancer Biology, the Center for Cell Clearance, and the Beirne B. Carter Center for Immunology Research (C.B.M., U.M.L., K.S.R.), and Division of Endocrinology (E.B.), University of Virginia School of Medicine, Charlottesville; Department of Biochemistry and Genetics, La Trobe University, Melbourne, Australia (I.K.H.P.); and Molecular Cardiology Research Institute, Tufts Medical Center, Boston, MA (I.Z.J.)
| | - Douglas A Bayliss
- From the Department of Molecular Physiology and Biophysics, Robert M. Berne Cardiovascular Research Center (M.E.G., J.T.B., L.J.D., A.W.L., B.E.I.), Department of Pharmacology (Y.-H.C., S.K.M., N.L., B.N.D., D.A.B.), Department of Microbiology, Immunology and Cancer Biology, the Center for Cell Clearance, and the Beirne B. Carter Center for Immunology Research (C.B.M., U.M.L., K.S.R.), and Division of Endocrinology (E.B.), University of Virginia School of Medicine, Charlottesville; Department of Biochemistry and Genetics, La Trobe University, Melbourne, Australia (I.K.H.P.); and Molecular Cardiology Research Institute, Tufts Medical Center, Boston, MA (I.Z.J.)
| | - Brant E Isakson
- From the Department of Molecular Physiology and Biophysics, Robert M. Berne Cardiovascular Research Center (M.E.G., J.T.B., L.J.D., A.W.L., B.E.I.), Department of Pharmacology (Y.-H.C., S.K.M., N.L., B.N.D., D.A.B.), Department of Microbiology, Immunology and Cancer Biology, the Center for Cell Clearance, and the Beirne B. Carter Center for Immunology Research (C.B.M., U.M.L., K.S.R.), and Division of Endocrinology (E.B.), University of Virginia School of Medicine, Charlottesville; Department of Biochemistry and Genetics, La Trobe University, Melbourne, Australia (I.K.H.P.); and Molecular Cardiology Research Institute, Tufts Medical Center, Boston, MA (I.Z.J.).
| | - Kodi S Ravichandran
- From the Department of Molecular Physiology and Biophysics, Robert M. Berne Cardiovascular Research Center (M.E.G., J.T.B., L.J.D., A.W.L., B.E.I.), Department of Pharmacology (Y.-H.C., S.K.M., N.L., B.N.D., D.A.B.), Department of Microbiology, Immunology and Cancer Biology, the Center for Cell Clearance, and the Beirne B. Carter Center for Immunology Research (C.B.M., U.M.L., K.S.R.), and Division of Endocrinology (E.B.), University of Virginia School of Medicine, Charlottesville; Department of Biochemistry and Genetics, La Trobe University, Melbourne, Australia (I.K.H.P.); and Molecular Cardiology Research Institute, Tufts Medical Center, Boston, MA (I.Z.J.)
| |
Collapse
|
13
|
Novel technique to determine the p K A of clonidine at prejunctional α 2 -adrenoceptors in cardiac and vascular sympathetic transmission. Eur J Pharmacol 2017; 800:81-95. [DOI: 10.1016/j.ejphar.2017.02.030] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2016] [Revised: 02/15/2017] [Accepted: 02/16/2017] [Indexed: 11/22/2022]
|
14
|
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.
Collapse
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.
| |
Collapse
|