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Amoakon JP, Mylavarapu G, Amin RS, Naren AP. Pulmonary Vascular Dysfunctions in Cystic Fibrosis. Physiology (Bethesda) 2024; 39:0. [PMID: 38501963 DOI: 10.1152/physiol.00024.2023] [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: 11/16/2023] [Revised: 01/26/2024] [Accepted: 03/14/2024] [Indexed: 03/20/2024] Open
Abstract
Cystic fibrosis (CF) is an inherited disorder caused by a deleterious mutation in the cystic fibrosis transmembrane conductance regulator (CFTR) gene. Given that the CFTR protein is a chloride channel expressed on a variety of cells throughout the human body, mutations in this gene impact several organs, particularly the lungs. For this very reason, research regarding CF disease and CFTR function has historically focused on the lung airway epithelium. Nevertheless, it was discovered more than two decades ago that CFTR is also expressed and functional on endothelial cells. Despite the great strides that have been made in understanding the role of CFTR in the airway epithelium, the role of CFTR in the endothelium remains unclear. Considering that the airway epithelium and endothelium work in tandem to allow gas exchange, it becomes very crucial to understand how a defective CFTR protein can impact the pulmonary vasculature and overall lung function. Fortunately, more recent research has been dedicated to elucidating the role of CFTR in the endothelium. As a result, several vascular dysfunctions associated with CF disease have come to light. Here, we summarize the current knowledge on pulmonary vascular dysfunctions in CF and discuss applicable therapies.
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Affiliation(s)
- Jean-Pierre Amoakon
- Department of Systems Biology and Physiology, University of Cincinnati College of Medicine, Cincinnati, Ohio, United States
- Division of Pulmonary Medicine and Critical Care, Cedars-Sinai Medical Center, Los Angeles, California, United States
| | - Goutham Mylavarapu
- Division of Pulmonary Medicine, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio, United States
| | - Raouf S Amin
- Division of Pulmonary Medicine, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio, United States
| | - Anjaparavanda P Naren
- Department of Systems Biology and Physiology, University of Cincinnati College of Medicine, Cincinnati, Ohio, United States
- Division of Pulmonary Medicine and Critical Care, Cedars-Sinai Medical Center, Los Angeles, California, United States
- Division of Pulmonary Medicine, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio, United States
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2
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Balczon R, Lin MT, Voth S, Nelson AR, Schupp JC, Wagener BM, Pittet JF, Stevens T. Lung endothelium, tau, and amyloids in health and disease. Physiol Rev 2024; 104:533-587. [PMID: 37561137 DOI: 10.1152/physrev.00006.2023] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2023] [Revised: 06/26/2023] [Accepted: 08/04/2023] [Indexed: 08/11/2023] Open
Abstract
Lung endothelia in the arteries, capillaries, and veins are heterogeneous in structure and function. Lung capillaries in particular represent a unique vascular niche, with a thin yet highly restrictive alveolar-capillary barrier that optimizes gas exchange. Capillary endothelium surveys the blood while simultaneously interpreting cues initiated within the alveolus and communicated via immediately adjacent type I and type II epithelial cells, fibroblasts, and pericytes. This cell-cell communication is necessary to coordinate the immune response to lower respiratory tract infection. Recent discoveries identify an important role for the microtubule-associated protein tau that is expressed in lung capillary endothelia in the host-pathogen interaction. This endothelial tau stabilizes microtubules necessary for barrier integrity, yet infection drives production of cytotoxic tau variants that are released into the airways and circulation, where they contribute to end-organ dysfunction. Similarly, beta-amyloid is produced during infection. Beta-amyloid has antimicrobial activity, but during infection it can acquire cytotoxic activity that is deleterious to the host. The production and function of these cytotoxic tau and amyloid variants are the subject of this review. Lung-derived cytotoxic tau and amyloid variants are a recently discovered mechanism of end-organ dysfunction, including neurocognitive dysfunction, during and in the aftermath of infection.
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Affiliation(s)
- Ron Balczon
- Department of Biochemistry and Molecular Biology, University of South Alabama, Mobile, Alabama, United States
- Center for Lung Biology, University of South Alabama, Mobile, Alabama, United States
| | - Mike T Lin
- Department of Physiology and Cell Biology, University of South Alabama, Mobile, Alabama, United States
- Center for Lung Biology, University of South Alabama, Mobile, Alabama, United States
| | - Sarah Voth
- Department of Cell Biology and Physiology, Edward Via College of Osteopathic Medicine, Monroe, Louisiana, United States
| | - Amy R Nelson
- Department of Physiology and Cell Biology, University of South Alabama, Mobile, Alabama, United States
- Center for Lung Biology, University of South Alabama, Mobile, Alabama, United States
| | - Jonas C Schupp
- Pulmonary and Critical Care Medicine, Department of Internal Medicine, Yale University, New Haven, Connecticut, United States
- Department of Respiratory Medicine, Hannover Medical School, Hannover, Germany
- German Center for Lung Research (DZL), Hannover, Germany
| | - Brant M Wagener
- Department of Anesthesiology and Perioperative Medicine, University of Alabama-Birmingham, Birmingham, Alabama, United States
| | - Jean-Francois Pittet
- Department of Anesthesiology and Perioperative Medicine, University of Alabama-Birmingham, Birmingham, Alabama, United States
| | - Troy Stevens
- Department of Physiology and Cell Biology, University of South Alabama, Mobile, Alabama, United States
- Department of Internal Medicine, University of South Alabama, Mobile, Alabama, United States
- Center for Lung Biology, University of South Alabama, Mobile, Alabama, United States
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3
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Kumar M, Zaman MK, Das S, Goyary D, Pathak MP, Chattopadhyay P. Transient Receptor Potential Vanilloid (TRPV4) channel inhibition: A novel promising approach for the treatment of lung diseases. Biomed Pharmacother 2023; 163:114861. [PMID: 37178575 DOI: 10.1016/j.biopha.2023.114861] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2023] [Revised: 05/03/2023] [Accepted: 05/06/2023] [Indexed: 05/15/2023] Open
Abstract
Research on transient receptor potential vanilloid-4 (TRPV4) can provide a promising potential therapeutic target in the development of novel medicines for lung disorders. TRPV4 expresses in lung tissue and plays an important role in the maintenance of respiratory homeostatic function. TRPV4 is upregulated in life-threatening respiratory diseases like pulmonary hypertension, asthma, cystic fibrosis, and chronic obstructive pulmonary diseases. TRPV4 is linked to several proteins that have physiological functions and are sensitive to a wide variety of stimuli, such as mechanical stimulation, changes in temperature, and hypotonicity, and responds to a variety of proteins and lipid mediators, including anandamide (AA), the arachidonic acid metabolite, 5,6-epoxyeicosatrienoic acid (5,6-EET), a plant dimeric diterpenoid called bisandrographolide A (BAA), and the phorbol ester 4-alpha-phorbol-12,13-didecanoate (4α-PDD). This study focused on relevant research evidence of TRPV4 in lung disorders and its agonist and antagonist effects. TRPV4 can be a possible target of discovered molecules that exerts high therapeutic potential in the treatment of respiratory diseases by inhibiting TRPV4.
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Affiliation(s)
- Mohit Kumar
- Division of Pharmaceutical Technology, Defence Research Laboratory, Tezpur, Assam 784001, India; Department of Pharmaceutical Sciences, Dibrugarh University, Dibrugarh, Assam 786004, India
| | - Md Kamaruz Zaman
- Department of Pharmaceutical Sciences, Dibrugarh University, Dibrugarh, Assam 786004, India
| | - Sanghita Das
- Division of Pharmaceutical Technology, Defence Research Laboratory, Tezpur, Assam 784001, India; Pharmaceutical & Fine Chemical Division, Department of Chemical Technology, University of Calcutta, Kolkata, West Bengal 700073, India
| | - Danswrang Goyary
- Division of Pharmaceutical Technology, Defence Research Laboratory, Tezpur, Assam 784001, India
| | - Manash Pratim Pathak
- Faculty of Pharmaceutical Science, Assam down town University, Guwahati, Assam 781026, India.
| | - Pronobesh Chattopadhyay
- Division of Pharmaceutical Technology, Defence Research Laboratory, Tezpur, Assam 784001, India.
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4
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Müller I, Alt P, Rajan S, Schaller L, Geiger F, Dietrich A. Transient Receptor Potential (TRP) Channels in Airway Toxicity and Disease: An Update. Cells 2022; 11:2907. [PMID: 36139480 PMCID: PMC9497104 DOI: 10.3390/cells11182907] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2022] [Revised: 09/09/2022] [Accepted: 09/15/2022] [Indexed: 11/17/2022] Open
Abstract
Our respiratory system is exposed to toxicants and pathogens from both sides: the airways and the vasculature. While tracheal, bronchial and alveolar epithelial cells form a natural barrier in the airways, endothelial cells protect the lung from perfused toxic compounds, particulate matter and invading microorganism in the vascular system. Damages induce inflammation by our immune response and wound healing by (myo)fibroblast proliferation. Members of the transient receptor potential (TRP) superfamily of ion channel are expressed in many cells of the respiratory tract and serve multiple functions in physiology and pathophysiology. TRP expression patterns in non-neuronal cells with a focus on TRPA1, TRPC6, TRPM2, TRPM5, TRPM7, TRPV2, TRPV4 and TRPV6 channels are presented, and their roles in barrier function, immune regulation and phagocytosis are summarized. Moreover, TRP channels as future pharmacological targets in chronic obstructive pulmonary disease (COPD), asthma, cystic and pulmonary fibrosis as well as lung edema are discussed.
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Affiliation(s)
| | | | | | | | | | - Alexander Dietrich
- Walther-Straub-Institute of Pharmacology and Toxicology, Member of the German Center for Lung Research (DZL), LMU-Munich, Nussbaumstr. 26, 80336 Munich, Germany
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Toumpanakis D, Chatzianastasiou A, Vassilakopoulou V, Mizi E, Dettoraki M, Perlikos F, Giatra G, Mikos N, Theocharis S, Vassilakopoulos T. TRPV4 Inhibition Exerts Protective Effects Against Resistive Breathing Induced Lung Injury. Int J Chron Obstruct Pulmon Dis 2022; 17:343-353. [PMID: 35210764 PMCID: PMC8857953 DOI: 10.2147/copd.s336108] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2021] [Accepted: 02/03/2022] [Indexed: 11/23/2022] Open
Abstract
Introduction TRPV4 channels are calcium channels, activated by mechanical stress, that have been implicated in the pathogenesis of pulmonary inflammation. During resistive breathing (RB), increased mechanical stress is imposed on the lung, inducing lung injury. The role of TRPV4 channels in RB-induced lung injury is unknown. Materials and Methods Spontaneously breathing adult male C57BL/6 mice were subjected to RB by tracheal banding. Following anaesthesia, mice were placed under a surgical microscope, the surface area of the trachea was measured and a nylon band was sutured around the trachea to reduce area to half. The specific TRPV4 inhibitor, HC-067047 (10 mg/kg ip), was administered either prior to RB and at 12 hrs following initiation of RB (preventive) or only at 12 hrs after the initiation of RB (therapeutic protocol). Lung injury was assessed at 24 hrs of RB, by measuring lung mechanics, total protein, BAL total and differential cell count, KC and IL-6 levels in BAL fluid, surfactant Protein (Sp)D in plasma and a lung injury score by histology. Results RB decreased static compliance (Cst), increased total protein in BAL (p < 0.001), total cell count due to increased number of both macrophages and neutrophils, increased KC and IL-6 in BAL (p < 0.001 and p = 0.01, respectively) and plasma SpD (p < 0.0001). Increased lung injury score was detected. Both preventive and therapeutic HC-067047 administration restored Cst and inhibited the increase in total protein, KC and IL-6 levels in BAL fluid, compared to RB. Preventive TRPV4 inhibition ameliorated the increase in BAL cellularity, while therapeutic TRPV4 inhibition exerted a partial effect. TRPV4 inhibition blunted the increase in plasma SpD (p < 0.001) after RB and the increase in lung injury score was also inhibited. Conclusion TRPV4 inhibition exerts protective effects against RB-induced lung injury.
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Affiliation(s)
- Dimitrios Toumpanakis
- “Marianthi Simou” Applied Biomedical Research and Training Center, Evangelismos Hospital, Medical School, National and Kapodistrian University of Athens, Athens, Greece
- Correspondence: Dimitrios Toumpanakis, Email
| | - Athanasia Chatzianastasiou
- “Marianthi Simou” Applied Biomedical Research and Training Center, Evangelismos Hospital, Medical School, National and Kapodistrian University of Athens, Athens, Greece
| | - Vyronia Vassilakopoulou
- “Marianthi Simou” Applied Biomedical Research and Training Center, Evangelismos Hospital, Medical School, National and Kapodistrian University of Athens, Athens, Greece
| | - Eleftheria Mizi
- “Marianthi Simou” Applied Biomedical Research and Training Center, Evangelismos Hospital, Medical School, National and Kapodistrian University of Athens, Athens, Greece
| | - Maria Dettoraki
- “Marianthi Simou” Applied Biomedical Research and Training Center, Evangelismos Hospital, Medical School, National and Kapodistrian University of Athens, Athens, Greece
| | - Fotis Perlikos
- “Marianthi Simou” Applied Biomedical Research and Training Center, Evangelismos Hospital, Medical School, National and Kapodistrian University of Athens, Athens, Greece
| | - Georgia Giatra
- “Marianthi Simou” Applied Biomedical Research and Training Center, Evangelismos Hospital, Medical School, National and Kapodistrian University of Athens, Athens, Greece
- 3 Department of Critical Care Medicine, Evgenideio Hospital, Medical School, National and Kapodistrian University of Athens, Athens, Greece
| | - Nikolaos Mikos
- Allergology Department, Laiko General Hospital, Athens, Greece
| | - Stamatios Theocharis
- First Department of Pathology, Medical School, National and Kapodistrian University of Athens, Athens, Greece
| | - Theodoros Vassilakopoulos
- “Marianthi Simou” Applied Biomedical Research and Training Center, Evangelismos Hospital, Medical School, National and Kapodistrian University of Athens, Athens, Greece
- 3 Department of Critical Care Medicine, Evgenideio Hospital, Medical School, National and Kapodistrian University of Athens, Athens, Greece
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6
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TRPV4-dependent signaling mechanisms in systemic and pulmonary vasculature. CURRENT TOPICS IN MEMBRANES 2022; 89:1-41. [DOI: 10.1016/bs.ctm.2022.07.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Zheng Z, Wang X, Wang Y, King JAC, Xie P, Wu S. CaMK4 is a downstream effector of the α 1G T-type calcium channel to determine the angiogenic potential of pulmonary microvascular endothelial cells. Am J Physiol Cell Physiol 2021; 321:C964-C977. [PMID: 34586897 DOI: 10.1152/ajpcell.00216.2021] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2021] [Accepted: 09/27/2021] [Indexed: 01/25/2023]
Abstract
Pulmonary microvascular endothelial cells (PMVECs) uniquely express an α1G-subtype of voltage-gated T-type Ca2+ channel. We have previously revealed that the α1G channel functions as a background Ca2+ entry pathway that is critical for the cell proliferation, migration, and angiogenic potential of PMVECs, a novel function attributed to the coupling between α1G-mediated Ca2+ entry and constitutive Akt phosphorylation and activation. Despite this significance, mechanism(s) that link the α1G-mediated Ca2+ entry to Akt phosphorylation remain incompletely understood. In this study, we demonstrate that Ca2+/calmodulin-dependent protein kinase (CaMK) 4 serves as a downstream effector of the α1G-mediated Ca2+ entry to promote the angiogenic potential of PMVECs. Notably, CaMK2 and CaMK4 are both expressed in PMVECs. Pharmacological blockade or genetic knockdown of the α1G channel led to a significant reduction in the phosphorylation level of CaMK4 but not the phosphorylation level of CaMK2. Pharmacological inhibition as well as genetic knockdown of CaMK4 significantly decreased cell proliferation, migration, and network formation capacity in PMVECs. However, CaMK4 inhibition or knockdown did not alter Akt phosphorylation status in PMVECs, indicating that α1G/Ca2+/CaMK4 is independent of the α1G/Ca2+/Akt pathway in sustaining the cells' angiogenic potential. Altogether, these findings suggest a novel α1G-CaMK4 signaling complex that regulates the Ca2+-dominated angiogenic potential in PMVECs.
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Affiliation(s)
- Zhen Zheng
- Department of Anesthesiology and Perioperative Medicine, University of Alabama at Birmingham, Birmingham, Alabama
| | - Xuelin Wang
- Department of Respiratory and Critical Care Medicine, Henan Provincial People's Hospital, Zhengzhou, China
| | - Yuxia Wang
- Department of Anesthesiology, The Third Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Judy A C King
- Department of Pathology and Translational Pathobiology, Louisiana State University Health Sciences Center - Shreveport, Shreveport, Louisiana
| | - Peilin Xie
- Department of Anesthesiology, The Third Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Songwei Wu
- Department of Anesthesiology and Perioperative Medicine, University of Alabama at Birmingham, Birmingham, Alabama
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8
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Endothelial Transient Receptor Potential V4 Channels Mediate Lung Ischemia-Reperfusion Injury. Ann Thorac Surg 2021; 113:1256-1264. [PMID: 33961815 DOI: 10.1016/j.athoracsur.2021.04.052] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/07/2021] [Revised: 04/15/2021] [Accepted: 04/19/2021] [Indexed: 11/20/2022]
Abstract
BACKGROUND Lung ischemia-reperfusion injury (IRI), involving severe inflammation and edema, is a major cause of primary graft dysfunction following transplant. Activation of transient receptor potential vanilloid 4 (TRPV4) channels modulates vascular permeability. Thus, this study tests the hypothesis that endothelial TRPV4 channels mediate lung IRI. METHODS C57BL/6 wild-type (WT), TRPV4-/-, tamoxifen-inducible endothelial TRPV4 knockout (TRPV4EC-/-), and tamoxifen-treated control (TRPV4fl/fl) mice underwent lung IR using a left lung hilar-ligation model (n≥6 mice/group). WT mice were also treated with a TRPV4-specific inhibitor (GSK2193874; 1mg/kg) (WT+GSK219). Partial pressure of oxygen (PaO2), edema (wet-to-dry weight ratio), compliance, neutrophil infiltration, and cytokine concentrations in bronchioalveolar lavage fluid were assessed. Pulmonary microvascular endothelial cells (PMVECs) were characterized in vitro following exposure to hypoxia-reoxygenation. RESULTS Compared to WT, PaO2 following IR was significantly improved in TRPV4-/- mice (133.1±43.9 vs 427.8±83.1 mmHg, p<0.001) and WT+GSK219 mice (133.1±43.9 vs 447.0±67.6 mmHg, p<0.001). Pulmonary edema and neutrophil infiltration were also significantly reduced after IR in TRPV4-/- and WT+GSK219 mice versus WT. TRPV4EC-/- mice following IR demonstrated significantly improved oxygenation versus control (109.2±21.6 vs 405.3±41.4 mmHg, p<0.001) as well as significantly improved compliance, and significantly less edema, neutrophil infiltration and proinflammatory cytokine production (TNF-α, CXCL1, IL-17, IFN-γ). Hypoxia-reoxygenation-induced permeability and CXCL1 expression by PMVECs was significantly attenuated by TRPV4 inhibitors. CONCLUSIONS Endothelial TRPV4 plays a key role in vascular permeability and lung inflammation following IR. TRPV4 channels may be a promising therapeutic target to mitigate lung IRI and decrease the incidence of primary graft dysfunction following transplant. (Word Count: 249/250).
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Rajan S, Schremmer C, Weber J, Alt P, Geiger F, Dietrich A. Ca 2+ Signaling by TRPV4 Channels in Respiratory Function and Disease. Cells 2021; 10:cells10040822. [PMID: 33917551 PMCID: PMC8067475 DOI: 10.3390/cells10040822] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2021] [Revised: 03/23/2021] [Accepted: 04/04/2021] [Indexed: 12/14/2022] Open
Abstract
Members of the transient receptor potential (TRP) superfamily are broadly expressed in our body and contribute to multiple cellular functions. Most interestingly, the fourth member of the vanilloid family of TRP channels (TRPV4) serves different partially antagonistic functions in the respiratory system. This review highlights the role of TRPV4 channels in lung fibroblasts, the lung endothelium, as well as the alveolar and bronchial epithelium, during physiological and pathophysiological mechanisms. Data available from animal models and human tissues confirm the importance of this ion channel in cellular signal transduction complexes with Ca2+ ions as a second messenger. Moreover, TRPV4 is an excellent therapeutic target with numerous specific compounds regulating its activity in diseases, like asthma, lung fibrosis, edema, and infections.
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10
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Maier-Begandt D, Comstra HS, Molina SA, Krüger N, Ruddiman CA, Chen YL, Chen X, Biwer LA, Johnstone SR, Lohman AW, Good ME, DeLalio LJ, Hong K, Bacon HM, Yan Z, Sonkusare SK, Koval M, Isakson BE. A venous-specific purinergic signaling cascade initiated by Pannexin 1 regulates TNFα-induced increases in endothelial permeability. Sci Signal 2021; 14:14/672/eaba2940. [PMID: 33653920 PMCID: PMC8011850 DOI: 10.1126/scisignal.aba2940] [Citation(s) in RCA: 25] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
The endothelial cell barrier regulates the passage of fluid between the bloodstream and underlying tissues, and barrier function impairment exacerbates the severity of inflammatory insults. To understand how inflammation alters vessel permeability, we studied the effects of the proinflammatory cytokine TNFα on transendothelial permeability and electrophysiology in ex vivo murine veins and arteries. We found that TNFα specifically decreased the barrier function of venous endothelium without affecting that of arterial endothelium. On the basis of RNA expression profiling and protein analysis, we found that claudin-11 (CLDN11) was the predominant claudin in venous endothelial cells and that there was little, if any, CLDN11 in arterial endothelial cells. Consistent with a difference in claudin composition, TNFα increased the permselectivity of Cl- over Na+ in venous but not arterial endothelium. The vein-specific effects of TNFα also required the activation of Pannexin 1 (Panx1) channels and the CD39-mediated hydrolysis of ATP to adenosine, which subsequently stimulated A2A adenosine receptors. Moreover, the increase in vein permeability required the activation of the Ca2+ channel TRPV4 downstream of Panx1 activation. Panx1-deficient mice resisted the pathologic effects of sepsis induced by cecal ligation and puncture on life span and lung vascular permeability. These data provide a targetable pathway with the potential to promote vein barrier function and prevent the deleterious effects of vascular leak in response to inflammation.
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Affiliation(s)
- Daniela Maier-Begandt
- Robert M. Berne Cardiovascular Research Center, University of Virginia School of Medicine, Charlottesville, VA 22908, USA.,Walter Brendel Center of Experimental Medicine, University Hospital, and Institute of Cardiovascular Physiology and Pathophysiology, Biomedical Center, LMU Munich, 82152 Planegg-Martinsried, Germany
| | - Heather Skye Comstra
- Division of Pulmonary, Allergy, Critical Care and Sleep Medicine, Department of Medicine, Emory University School of Medicine, Atlanta, GA 30322, USA
| | - Samuel A Molina
- Division of Pulmonary, Allergy, Critical Care and Sleep Medicine, Department of Medicine, Emory University School of Medicine, Atlanta, GA 30322, USA
| | - Nenja Krüger
- Robert M. Berne Cardiovascular Research Center, University of Virginia School of Medicine, Charlottesville, VA 22908, USA.,Institute of Animal Developmental and Molecular Biology, Heinrich Heine University Düsseldorf, Düsseldorf, Germany
| | - Claire A Ruddiman
- Robert M. Berne Cardiovascular Research Center, University of Virginia School of Medicine, Charlottesville, VA 22908, USA
| | - Yen-Lin Chen
- Robert M. Berne Cardiovascular Research Center, University of Virginia School of Medicine, Charlottesville, VA 22908, USA
| | - Xiaobin Chen
- Robert M. Berne Cardiovascular Research Center, University of Virginia School of Medicine, Charlottesville, VA 22908, USA
| | - Lauren A Biwer
- 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
| | - Scott R Johnstone
- Fralin Biomedical Research Institute at Virginia Tech Carilion Center for Heart and Reparative Medicine Research, Virginia Tech, Roanoke, VA 24016, USA.,Department of Biological Sciences, Virginia Tech, Blacksburg, VA 24060, USA
| | - Alexander W Lohman
- Hotchkiss Brain Institute, University of Calgary, Calgary, Alberta T2N 4N1, Canada.,Department of Cell Biology and Anatomy, University of Calgary, Calgary, Alberta T2N 4N1, Canada
| | - Miranda E Good
- Molecular Cardiology Research Institute, Tufts Medical Center, Boston, MA 02111, USA
| | - Leon J DeLalio
- Robert M. Berne Cardiovascular Research Center, University of Virginia School of Medicine, Charlottesville, VA 22908, USA
| | - Kwangseok Hong
- Department of Physical Education, College of Education, Chung-Ang University, Seoul 06974, South Korea
| | - Hannah M Bacon
- Robert M. Berne Cardiovascular Research Center, University of Virginia School of Medicine, Charlottesville, VA 22908, USA
| | - Zhen Yan
- Robert M. Berne Cardiovascular Research Center, University of Virginia School of Medicine, Charlottesville, VA 22908, USA
| | - Swapnil K Sonkusare
- 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
| | - Michael Koval
- Division of Pulmonary, Allergy, Critical Care and Sleep Medicine, Department of Medicine, Emory University School of Medicine, Atlanta, GA 30322, USA. .,Department of Cell Biology, Emory University School of Medicine, Atlanta, GA 30322, 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 22908, USA
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11
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Beddek K, Raffin F, Borgel D, Saller F, Riccobono D, Bobe R, Boittin F. TRPV4 channel activation induces the transition of venous and arterial endothelial cells toward a pro-inflammatory phenotype. Physiol Rep 2021; 9:e14613. [PMID: 33512067 PMCID: PMC7845413 DOI: 10.14814/phy2.14613] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2020] [Revised: 09/20/2020] [Accepted: 09/22/2020] [Indexed: 11/24/2022] Open
Abstract
The Transient Receptor Potential Vanilloid 4 (TRPV4) of endothelial cells contributes to many important functions including the regulation of Ca2+ homeostasis, cell volume, endothelial barrier permeability, and smooth muscle tone. However, its role in the transition of endothelial cells toward a pro-inflammatory phenotype has not been studied so far. Using both arterial and venous endothelial cells, we first show that the pharmacological activation of TRPV4 channels with GSK1016790A, a potent TRPV4 agonist, triggers robust and sustained Ca2+ increases, which are blocked by both TRPV4 antagonists HC067047 and RN9893. TRPV4 activation also triggers the actin cytoskeleton and adherens junction (VE-Cadherin) rearrangement in both arterial and venous endothelial cells and leads to rapid decreases of trans-endothelial electrical resistance. In addition to its effect on endothelial barrier integrity, TRPV4 activation selectively increases ICAM-1 surface expression in arterial and venous endothelial cells, due to the stimulation of ICAM-1 gene expression through the NF-κB transcription factor. TRPV4 channel activation also induced apoptosis of venous and arterial endothelial cells, while TRPV4 blockade reduced apoptosis, even in the absence of TRPV4 activation. As altered barrier integrity, increased adhesion molecule expression and apoptosis are hallmarks of the pro-inflammatory state of endothelial cells, our results indicate that TRPV4 channel activity can induce the transition of both venous and arterial endothelial cells toward a pro-inflammatory phenotype.
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Affiliation(s)
- Kathia Beddek
- INSERM Unité Mixte de Recherche‐Santé 1176Université Paris‐SudUniversité Paris‐SaclayLe Kremlin‐BicêtreFrance
| | - Florent Raffin
- Département des Plateformesunité Analyses BiologiquesIRBA (Institut de Recherche Biomédicale des Armées)Brétigny‐sur‐OrgeFrance
| | - Delphine Borgel
- INSERM Unité Mixte de Recherche‐Santé 1176Université Paris‐SudUniversité Paris‐SaclayLe Kremlin‐BicêtreFrance
| | - François Saller
- INSERM Unité Mixte de Recherche‐Santé 1176Université Paris‐SudUniversité Paris‐SaclayLe Kremlin‐BicêtreFrance
| | - Diane Riccobono
- Département Effets Biologiques des Rayonnementsunité de RadiobiologieIRBA (Institut de Recherche Biomédicale des Armées)Brétigny‐sur‐OrgeFrance
| | - Régis Bobe
- INSERM Unité Mixte de Recherche‐Santé 1176Université Paris‐SudUniversité Paris‐SaclayLe Kremlin‐BicêtreFrance
| | - François‐Xavier Boittin
- Département Effets Biologiques des Rayonnementsunité de RadiobiologieIRBA (Institut de Recherche Biomédicale des Armées)Brétigny‐sur‐OrgeFrance
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12
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Jagtap J, Audi S, Razeghi-Kondelaji MH, Fish BL, Hansen C, Narayan J, Gao F, Sharma G, Parchur AK, Banerjee A, Bergom C, Medhora M, Joshi A. A rapid dynamic in vivo near-infrared fluorescence imaging assay to track lung vascular permeability after acute radiation injury. Am J Physiol Lung Cell Mol Physiol 2021; 320:L436-L450. [PMID: 33404364 DOI: 10.1152/ajplung.00066.2020] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023] Open
Abstract
To develop a dynamic in vivo near-infrared (NIR) fluorescence imaging assay to quantify sequential changes in lung vascular permeability-surface area product (PS) in rodents. Dynamic NIR imaging methods for determining lung vascular permeability-surface area product were developed and tested on non-irradiated and 13 Gy irradiated rats with/without treatment with lisinopril, a radiation mitigator. A physiologically-based pharmacokinetic (PBPK) model of indocyanine green (ICG) pulmonary disposition was applied to in vivo imaging data and PS was estimated. In vivo results were validated by five accepted assays: ex vivo perfused lung imaging, endothelial filtration coefficient (Kf) measurement, pulmonary vascular resistance measurement, Evan's blue dye uptake, and histopathology. A PBPK model-derived measure of lung vascular permeability-surface area product increased from 2.60 ± 0.40 [CL: 2.42-2.78] mL/min in the non-irradiated group to 6.94 ± 8.25 [CL: 3.56-10.31] mL/min in 13 Gy group after 42 days. Lisinopril treatment lowered PS in the 13 Gy group to 4.76 ± 6.17 [CL: 2.12-7.40] mL/min. A much higher up to 5× change in PS values was observed in rats exhibiting severe radiation injury. Ex vivo Kf (mL/min/cm H2O/g dry lung weight), a measure of pulmonary vascular permeability, showed similar trends in lungs of irradiated rats (0.164 ± 0.081 [CL: 0.11-0.22]) as compared to non-irradiated controls (0.022 ± 0.003 [CL: 0.019-0.025]), with reduction to 0.070 ± 0.035 [CL: 0.045-0.096] for irradiated rats treated with lisinopril. Similar trends were observed for ex vivo pulmonary vascular resistance, Evan's blue uptake, and histopathology. Our results suggest that whole body dynamic NIR fluorescence imaging can replace current assays, which are all terminal. The imaging accurately tracks changes in PS and changes in lung interstitial transport in vivo in response to radiation injury.
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Affiliation(s)
- Jaidip Jagtap
- Department of Biomedical Engineering, Medical College of Wisconsin, Milwaukee, Wisconsin
| | - Said Audi
- Department of Biomedical Engineering, Medical College of Wisconsin, Milwaukee, Wisconsin.,Department of Biomedical Engineering, Marquette University, Milwaukee, Wisconsin
| | | | - Brian L Fish
- Department of Radiation Oncology, Medical College of Wisconsin, Milwaukee, Wisconsin
| | - Christopher Hansen
- Department of Biomedical Engineering, Medical College of Wisconsin, Milwaukee, Wisconsin
| | - Jayashree Narayan
- Department of Radiation Oncology, Medical College of Wisconsin, Milwaukee, Wisconsin
| | - Feng Gao
- Department of Radiation Oncology, Medical College of Wisconsin, Milwaukee, Wisconsin
| | - Gayatri Sharma
- Department of Biomedical Engineering, Medical College of Wisconsin, Milwaukee, Wisconsin
| | - Abdul K Parchur
- Department of Biomedical Engineering, Medical College of Wisconsin, Milwaukee, Wisconsin
| | - Anjishnu Banerjee
- Division of Biostatistics, Medical College of Wisconsin, Milwaukee, Wisconsin
| | - Carmen Bergom
- Department of Radiation Oncology, Medical College of Wisconsin, Milwaukee, Wisconsin.,Department of Pharmacology and Toxicology, Medical College of Wisconsin, Milwaukee, Wisconsin.,Cancer Center, Medical College of Wisconsin, Milwaukee, Wisconsin.,Cardiovascular Center, Medical College of Wisconsin, Milwaukee, Wisconsin
| | - Meetha Medhora
- Department of Radiation Oncology, Medical College of Wisconsin, Milwaukee, Wisconsin.,Cardiovascular Center, Medical College of Wisconsin, Milwaukee, Wisconsin.,Department of Pulmonary Medicine, Medical College of Wisconsin, Milwaukee, Wisconsin
| | - Amit Joshi
- Department of Biomedical Engineering, Medical College of Wisconsin, Milwaukee, Wisconsin.,Department of Biomedical Engineering, Marquette University, Milwaukee, Wisconsin
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13
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Li SS, Gao S, Chen Y, Bao H, Li ZT, Yao QP, Liu JT, Wang Y, Qi YX. Platelet-derived microvesicles induce calcium oscillations and promote VSMC migration via TRPV4. Am J Cancer Res 2021; 11:2410-2423. [PMID: 33500733 PMCID: PMC7797689 DOI: 10.7150/thno.47182] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2020] [Accepted: 11/18/2020] [Indexed: 12/11/2022] Open
Abstract
Rationale: Abnormal migration of vascular smooth muscle cells (VSMCs) from the media to the interior is a critical process during the intimal restenosis caused by vascular injury. Here, we determined the role of platelet-derived microvesicles (PMVs) released by activated platelets in VSMC migration. Methods: A percutaneous transluminal angioplasty balloon dilatation catheter was used to establish vascular intimal injury. Collagen I was used to activate PMVs, mimicking collagen exposure during intimal injury. To determine the effects of PMVs on VSMC migration in vitro, scratch wound healing assays were performed. Fluorescence resonance energy transfer was used to detect variations of calcium dynamics in VSMCs. Results: Morphological results showed that neointimal hyperplasia was markedly increased after balloon injury of the carotid artery in rats, and the main component was VSMCs. PMVs significantly promoted single cell migration and wound closure in vitro. Fluorescence resonance energy transfer revealed that PMVs induced temporal and dynamic calcium oscillations in the cytoplasms of VSMCs. The influx of extracellular calcium, but not calcium from intracellular stores, was involved in the process described above. The channel antagonist GSK219 and specific siRNA revealed that a membrane calcium channel, transient receptor potential vanilloid 4 (TRPV4), participated in the calcium oscillations and VSMC migration induced by PMVs. Conclusions: TRPV4 participated in the calcium oscillations and VSMC migration induced by PMVs. PMVs and the related molecules might be novel therapeutic targets for vascular remodeling during vascular injury.
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14
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Abstract
Of the 21 members of the connexin family, 4 (Cx37, Cx40, Cx43, and Cx45) are expressed in the endothelium and/or smooth muscle of intact blood vessels to a variable and dynamically regulated degree. Full-length connexins oligomerize and form channel structures connecting the cytosol of adjacent cells (gap junctions) or the cytosol with the extracellular space (hemichannels). The different connexins vary mainly with regard to length and sequence of their cytosolic COOH-terminal tails. These COOH-terminal parts, which in the case of Cx43 are also translated as independent short isoforms, are involved in various cellular signaling cascades and regulate cell functions. This review focuses on channel-dependent and -independent effects of connexins in vascular cells. Channels play an essential role in coordinating and synchronizing endothelial and smooth muscle activity and in their interplay, in the control of vasomotor actions of blood vessels including endothelial cell reactivity to agonist stimulation, nitric oxide-dependent dilation, and endothelial-derived hyperpolarizing factor-type responses. Further channel-dependent and -independent roles of connexins in blood vessel function range from basic processes of vascular remodeling and angiogenesis to vascular permeability and interactions with leukocytes with the vessel wall. Together, these connexin functions constitute an often underestimated basis for the enormous plasticity of vascular morphology and function enabling the required dynamic adaptation of the vascular system to varying tissue demands.
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Affiliation(s)
- Ulrich Pohl
- Walter-Brendel-Centre of Experimental Medicine, University Hospital, LMU Munich, Planegg-Martinsried, Germany; Biomedical Centre, Cardiovascular Physiology, LMU Munich, Planegg-Martinsried, Germany; German Centre for Cardiovascular Research, Partner Site Munich Heart Alliance, Munich, Germany; and Munich Cluster for Systems Neurology (SyNergy), Munich, Germany
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15
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Rosenbaum T, Benítez-Angeles M, Sánchez-Hernández R, Morales-Lázaro SL, Hiriart M, Morales-Buenrostro LE, Torres-Quiroz F. TRPV4: A Physio and Pathophysiologically Significant Ion Channel. Int J Mol Sci 2020; 21:ijms21113837. [PMID: 32481620 PMCID: PMC7312103 DOI: 10.3390/ijms21113837] [Citation(s) in RCA: 63] [Impact Index Per Article: 15.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2020] [Revised: 05/23/2020] [Accepted: 05/24/2020] [Indexed: 02/07/2023] Open
Abstract
Transient Receptor Potential (TRP) channels are a family of ion channels whose members are distributed among all kinds of animals, from invertebrates to vertebrates. The importance of these molecules is exemplified by the variety of physiological roles they play. Perhaps, the most extensively studied member of this family is the TRPV1 ion channel; nonetheless, the activity of TRPV4 has been associated to several physio and pathophysiological processes, and its dysfunction can lead to severe consequences. Several lines of evidence derived from animal models and even clinical trials in humans highlight TRPV4 as a therapeutic target and as a protein that will receive even more attention in the near future, as will be reviewed here.
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Affiliation(s)
- Tamara Rosenbaum
- Departamento de Neurociencia Cognitiva, División Neurociencias, Instituto de Fisiología Celular, Universidad Nacional Autónoma de México, Mexico City 04510, Mexico; (M.B.-A.); (R.S.-H.); (S.L.M.-L.); (M.H.)
- Correspondence: ; Tel.: +52-555-622-56-24; Fax: +52-555-622-56-07
| | - Miguel Benítez-Angeles
- Departamento de Neurociencia Cognitiva, División Neurociencias, Instituto de Fisiología Celular, Universidad Nacional Autónoma de México, Mexico City 04510, Mexico; (M.B.-A.); (R.S.-H.); (S.L.M.-L.); (M.H.)
| | - Raúl Sánchez-Hernández
- Departamento de Neurociencia Cognitiva, División Neurociencias, Instituto de Fisiología Celular, Universidad Nacional Autónoma de México, Mexico City 04510, Mexico; (M.B.-A.); (R.S.-H.); (S.L.M.-L.); (M.H.)
| | - Sara Luz Morales-Lázaro
- Departamento de Neurociencia Cognitiva, División Neurociencias, Instituto de Fisiología Celular, Universidad Nacional Autónoma de México, Mexico City 04510, Mexico; (M.B.-A.); (R.S.-H.); (S.L.M.-L.); (M.H.)
| | - Marcia Hiriart
- Departamento de Neurociencia Cognitiva, División Neurociencias, Instituto de Fisiología Celular, Universidad Nacional Autónoma de México, Mexico City 04510, Mexico; (M.B.-A.); (R.S.-H.); (S.L.M.-L.); (M.H.)
| | - Luis Eduardo Morales-Buenrostro
- Departamento de Nefrología y Metabolismo Mineral, Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán, Mexico City 14080, Mexico;
| | - Francisco Torres-Quiroz
- Departamento de Bioquímica y Biología Estructural, División Investigación Básica, Instituto de Fisiología Celular, Universidad Nacional Autónoma de México, Mexico City 04510, Mexico;
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16
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Yao L, Chen S, Tang H, Huang P, Wei S, Liang Z, Chen X, Yang H, Tao A, Chen R, Zhang Q. Transient Receptor Potential Ion Channels Mediate Adherens Junctions Dysfunction in a Toluene Diisocyanate-Induced Murine Asthma Model. Toxicol Sci 2020; 168:160-170. [PMID: 30517707 DOI: 10.1093/toxsci/kfy285] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
Disruption of epithelial cell-cell junctions is essential for the initiation and perpetuation of airway inflammation in asthma. We've previously reported compromised epithelial barrier integrity in a toluene diisocyanate (TDI)-induced occupational asthma model. This study is aimed to explore the role of transient receptor potential vanilloid 4 (TRPV4) and transient receptor potential ankyrin 1 (TRPA1) in the dysfunction of adherens junctions in TDI-induced asthma. Mice were sensitized and challenged with TDI for a chemical-induced asthma model. Selective blockers of TRPV4 glycogen synthase kinase (GSK)2193874, 5 and 10 mg/kg) and TRPA1 (HC030031, 10 and 20 mg/kg) were intraperitoneally given to the mice. Immunohistochemistry revealed different expression pattern of TRPV4 and TRPA1 in lung. TDI exposure increased TRPV4 expression in the airway, which can be suppressed by GSK2193874, while treatment with neither TDI alone nor TDI together with HC030031 led to changes of TRPA1 expression in the lung. Blocking either TRPV4 or TRPA1 blunted TDI-induced airway hyperreactivity, airway neutrophilia and eosinophilia, as well as Th2 responses in a dose-dependent manner. At the same time, membrane levels of E-cadherin and β-catenin were significantly decreased after TDI inhalation, which were inhibited by GSK2193874 or HC030031. Moreover, GSK2193874 and HC030031 also suppressed serine phosphorylation of glycogen synthase kinase 3β, tyrosine phosphorylation of β-catenin, as well as activation and nuclear transport of β-catenin in mice sensitized and challenged with TDI. Our study suggested that both TRPV4 and TRPA1 contribute critically to E-cadherin and β-catenin dysfunction in TDI-induced asthma, proposing novel therapeutic targets for asthma.
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Affiliation(s)
- Lihong Yao
- State Key Laboratory of Respiratory Diseases, Guangzhou Institute of Respiratory Health, The First Affiliated Hospital of Guangzhou Medical University
| | - Shuyu Chen
- Guangdong Provincial Key Laboratory of Allergy & Clinical Immunology, State Key Laboratory of Respiratory Disease, The Second Affiliated Hospital of Guangzhou Medical University, Guangzhou Medical University, Guangzhou 510180, China
| | - Haixiong Tang
- Department of Respiratory Medicine, Minzu Hospital of Guangxi Zhuang Autonomous Region, Guangxi Medical University, Nanning 530001, China
| | - Peikai Huang
- State Key Laboratory of Respiratory Diseases, Department of Allergy and Clinical Immunology, Guangzhou Institute of Respiratory Health, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou Medical University, Guangzhou 510180, China
| | - Shushan Wei
- State Key Laboratory of Respiratory Diseases, Department of Allergy and Clinical Immunology, Guangzhou Institute of Respiratory Health, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou Medical University, Guangzhou 510180, China
| | - Zhenyu Liang
- State Key Laboratory of Respiratory Diseases, Guangzhou Institute of Respiratory Health, The First Affiliated Hospital of Guangzhou Medical University
| | - Xin Chen
- Department of Respiratory Medicine, Zhujiang Hospital, Southern Medical University, Guangzhou 510280, China
| | - Hongyu Yang
- Division of Respirology, Department of Medicine, McMaster University, Firestone Institute for Respiratory Health (FIRH), The Research Institution of St. Joe's Hamilton (RISH), St. Joseph's Healthcare, Hamilton, ON L8N 4A6, Canada
| | - Ailin Tao
- Guangdong Provincial Key Laboratory of Allergy & Clinical Immunology, State Key Laboratory of Respiratory Disease, The Second Affiliated Hospital of Guangzhou Medical University, Guangzhou Medical University, Guangzhou 510180, China
| | - Rongchang Chen
- State Key Laboratory of Respiratory Diseases, Guangzhou Institute of Respiratory Health, The First Affiliated Hospital of Guangzhou Medical University
| | - Qingling Zhang
- State Key Laboratory of Respiratory Diseases, Department of Allergy and Clinical Immunology, Guangzhou Institute of Respiratory Health, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou Medical University, Guangzhou 510180, China
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17
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Calcium-Permeable Channels in Tumor Vascularization: Peculiar Sensors of Microenvironmental Chemical and Physical Cues. Rev Physiol Biochem Pharmacol 2020; 182:111-137. [DOI: 10.1007/112_2020_32] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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18
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Chen YL, Sonkusare SK. Endothelial TRPV4 channels and vasodilator reactivity. CURRENT TOPICS IN MEMBRANES 2020; 85:89-117. [PMID: 32402646 PMCID: PMC9748413 DOI: 10.1016/bs.ctm.2020.01.007] [Citation(s) in RCA: 35] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Transient receptor potential vanilloid 4 (TRPV4) ion channels on the endothelial cell membrane are widely regarded as a crucial Ca2+ influx pathway that promotes endothelium-dependent vasodilation. The downstream vasodilatory targets of endothelial TRPV4 channels vary among different vascular beds, potentially contributing to endothelial cell heterogeneity. Although numerous studies have examined the role of endothelial TRPV4 channels using specific pharmacological tools over the past decade, their physiological significance remains unclear, mainly due to a lack of endothelium-specific knockouts. Moreover, the loss of endothelium-dependent vasodilation is a significant contributor to vascular dysfunction in cardiovascular disease. The activity of endothelial TRPV4 channels is impaired in cardiovascular disease; therefore, strategies targeting the mechanisms that reduce endothelial TRPV4 channel activity may restore vascular function and provide therapeutic benefit. In this chapter, we discuss endothelial TRPV4 channel-dependent signaling mechanisms, the heterogeneity in endogenous activators and targets of endothelial TRPV4 channels, and the role of endothelial TRPV4 channels in the pathogenesis of cardiovascular diseases. We also discuss potentially interesting future research directions that may provide novel insights into the physiological and pathological roles of endothelial TRPV4 channels.
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Affiliation(s)
- Yen-Lin Chen
- Robert M. Berne Cardiovascular Research Center, University of Virginia-School of Medicine, Charlottesville, VA, United States
| | - Swapnil K. Sonkusare
- Robert M. Berne Cardiovascular Research Center, University of Virginia-School of Medicine, Charlottesville, VA, United States,Department of Molecular Physiology and Biological Physics, University of Virginia-School of Medicine, Charlottesville, VA, United States,Corresponding author:
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19
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Dalal PJ, Muller WA, Sullivan DP. Endothelial Cell Calcium Signaling during Barrier Function and Inflammation. THE AMERICAN JOURNAL OF PATHOLOGY 2019; 190:535-542. [PMID: 31866349 DOI: 10.1016/j.ajpath.2019.11.004] [Citation(s) in RCA: 113] [Impact Index Per Article: 22.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/09/2019] [Revised: 11/11/2019] [Accepted: 11/25/2019] [Indexed: 12/13/2022]
Abstract
Calcium is an essential second messenger in endothelial cells and plays a pivotal role in regulating a number of physiologic processes, including cell migration, angiogenesis, barrier function, and inflammation. An increase in intracellular Ca2+ concentration can trigger a number of diverse signaling pathways under both physiologic and pathologic conditions. In this review, we discuss how calcium signaling pathways in endothelial cells play an essential role in affecting barrier function and facilitating inflammation. Inflammatory mediators, such as thrombin and histamine, increase intracellular calcium levels. This calcium influx causes adherens junction disassembly and cytoskeletal rearrangements to facilitate endothelial cell retraction and increased permeability. During inflammation endothelial cell calcium entry and the calcium-related signaling events also help facilitate several leukocyte-endothelial cell interactions, such as leukocyte rolling, adhesion, and ultimately transendothelial migration.
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Affiliation(s)
- Prarthana J Dalal
- Department of Pathology, Northwestern University Feinberg School of Medicine, Chicago, Illinois
| | - William A Muller
- Department of Pathology, Northwestern University Feinberg School of Medicine, Chicago, Illinois
| | - David P Sullivan
- Department of Pathology, Northwestern University Feinberg School of Medicine, Chicago, Illinois.
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20
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Pairet N, Mang S, Kiechle T, Laufhäger N, Dietl P, Lamb DJ. Differential modulation of transendothelial electrical resistance by TRPV4 agonists is mediated by apoptosis and/or necrosis. Biochem Biophys Rep 2019; 20:100672. [PMID: 31650038 PMCID: PMC6804647 DOI: 10.1016/j.bbrep.2019.100672] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2018] [Revised: 02/15/2019] [Accepted: 07/30/2019] [Indexed: 12/12/2022] Open
Abstract
Transient receptor potential vanilloid 4 (TRPV4) has been implicated in many disease conditions also in the lung. Its activation leads to an increase endothelial permeability in an intracellular calcium-influx dependent manner. We investigated its function in vitro on primary human endothelial cells using two TRPV4 agonists, GSK1016790A and 4α-Phorbol 12,13-didecanoate (4α-PDD) and a selective TRPV4 blocker GSK2193874. Both TRPV4 agonists leaded to a reduction in transendothelial electrical resistance (TER) which was mediated however by differential cytotoxic effects. 4α-PDD induced apoptosis that could not be blocked by TRPV4 inhibition in HUVECs, whereas GSK1016790A selectively activated TRPV4 and reduced TER as a consequence of cellular necrosis. TRPV4 mediated cytotoxicity is poorly described and may provide significant context to the role of TRPV4 in barrier-function. TRPV4 agonism is widely associated with barrier-dysfunction. We show TRPV4 mediated increased membrane permeability is caused by cytotoxicity. The TRPV4 agonist GSK1016790A mediates barrier dysfunction via necrosis. The TRPV4 agonist 4α-PDD mediates barrier dysfunction via apoptosis.
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Affiliation(s)
- N Pairet
- Institute of General Physiology, University of Ulm, Ulm, Germany.,Drug Discovery Sciences, Boehringer Ingelheim Pharma GmbH & Co. KG, D-88397, Biberach an der Riß, Germany
| | - S Mang
- Immunology & Respiratory Diseases Research, Boehringer Ingelheim Pharma GmbH & Co. KG, D-88397, Biberach an der Riß, Germany.,Institute of Immunology, Hannover Medical School, D-30625, Hannover, Germany
| | - T Kiechle
- Immunology & Respiratory Diseases Research, Boehringer Ingelheim Pharma GmbH & Co. KG, D-88397, Biberach an der Riß, Germany
| | - N Laufhäger
- Immunology & Respiratory Diseases Research, Boehringer Ingelheim Pharma GmbH & Co. KG, D-88397, Biberach an der Riß, Germany
| | - P Dietl
- Institute of General Physiology, University of Ulm, Ulm, Germany
| | - D J Lamb
- Immunology & Respiratory Diseases Research, Boehringer Ingelheim Pharma GmbH & Co. KG, D-88397, Biberach an der Riß, Germany
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21
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Mukaiyama M, Yamasaki Y, Usui T, Nagumo Y. Transient receptor potential V4 channel stimulation induces reversible epithelial cell permeability in
MDCK
cell monolayers. FEBS Lett 2019; 593:2250-2260. [DOI: 10.1002/1873-3468.13490] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2019] [Revised: 06/03/2019] [Accepted: 06/03/2019] [Indexed: 12/14/2022]
Affiliation(s)
- Minagi Mukaiyama
- Graduate School of Life and Environmental Sciences University of Tsukuba Japan
| | - Yohei Yamasaki
- Graduate School of Life and Environmental Sciences University of Tsukuba Japan
| | - Takeo Usui
- Faculty of Life and Environmental Sciences University of Tsukuba Japan
- Microbiology Research Center for Sustainability (MiCS) University of Tsukuba Japan
| | - Yoko Nagumo
- Faculty of Life and Environmental Sciences University of Tsukuba Japan
- Alliance for Research on the Mediterranean and North Africa (ARENA) University of Tsukuba Japan
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22
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Thakore P, Earley S. Transient Receptor Potential Channels and Endothelial Cell Calcium Signaling. Compr Physiol 2019; 9:1249-1277. [PMID: 31187891 DOI: 10.1002/cphy.c180034] [Citation(s) in RCA: 54] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
The vascular endothelium is a broadly distributed and highly specialized organ. The endothelium has a number of functions including the control of blood vessels diameter through the production and release of potent vasoactive substances or direct electrical communication with underlying smooth muscle cells, regulates the permeability of the vascular barrier, stimulates the formation of new blood vessels, and influences inflammatory and thrombotic processes. Endothelial cells that make up the endothelium express a variety of cell-surface receptors and ion channels on the plasma membrane that are capable of detecting circulating hormones, neurotransmitters, oxygen tension, and shear stress across the vascular wall. Changes in these stimuli activate signaling cascades that initiate an appropriate physiological response. Increases in the global intracellular Ca2+ concentration and localized Ca2+ signals that occur within specialized subcellular microdomains are fundamentally important components of many signaling pathways in the endothelium. The transient receptor potential (TRP) channels are a superfamily of cation-permeable ion channels that act as a primary means of increasing cytosolic Ca2+ in endothelial cells. Consequently, TRP channels are vitally important for the major functions of the endothelium. In this review, we provide an in-depth discussion of Ca2+ -permeable TRP channels in the endothelium and their role in vascular regulation. © 2019 American Physiological Society. Compr Physiol 9:1249-1277, 2019.
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Affiliation(s)
- Pratish Thakore
- Department of Pharmacology, Center for Cardiovascular Research, University of Nevada, Reno School of Medicine, Reno, Nevada, USA
| | - Scott Earley
- Department of Pharmacology, Center for Cardiovascular Research, University of Nevada, Reno School of Medicine, Reno, Nevada, USA
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23
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Modulators of Transient Receptor Potential (TRP) Channels as Therapeutic Options in Lung Disease. Pharmaceuticals (Basel) 2019; 12:ph12010023. [PMID: 30717260 PMCID: PMC6469169 DOI: 10.3390/ph12010023] [Citation(s) in RCA: 38] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2019] [Revised: 01/28/2019] [Accepted: 01/29/2019] [Indexed: 12/25/2022] Open
Abstract
The lungs are essential for gas exchange and serve as the gateways of our body to the external environment. They are easily accessible for drugs from both sides, the airways and the vasculature. Recent literature provides evidence for a role of Transient Receptor Potential (TRP) channels as chemosensors and essential members of signal transduction cascades in stress-induced cellular responses. This review will focus on TRP channels (TRPA1, TRPC6, TRPV1, and TRPV4), predominantly expressed in non-neuronal lung tissues and their involvement in pathways associated with diseases like asthma, cystic fibrosis, chronic obstructive pulmonary disease (COPD), lung fibrosis, and edema formation. Recently identified specific modulators of these channels and their potential as new therapeutic options as well as strategies for a causal treatment based on the mechanistic understanding of molecular events will also be evaluated.
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24
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Zheng Z, Chen H, Xie P, Dickerson CA, King JAC, Alexeyev MF, Wu S. α 1G T-type calcium channel determines the angiogenic potential of pulmonary microvascular endothelial cells. Am J Physiol Cell Physiol 2019; 316:C353-C364. [PMID: 30649917 DOI: 10.1152/ajpcell.00336.2018] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Pulmonary microvascular endothelial cells (PMVECs) display a rapid angioproliferative phenotype, essential for maintaining homeostasis in steady-state and promoting vascular repair after injury. Although it has long been established that endothelial cytosolic Ca2+ ([Ca2+]i) transients are required for proliferation and angiogenesis, mechanisms underlying such regulation and the transmembrane channels mediating the relevant [Ca2+]i transients remain incompletely understood. In the present study, the functional role of the microvascular endothelial site-specific α1G T-type Ca2+ channel in angiogenesis was examined. PMVECs intrinsically possess an in vitro angiogenic "network formation" capacity. Depleting extracellular Ca2+ abolishes network formation, whereas blockade of vascular endothelial growth factor receptor or nitric oxide synthase has little or no effect, suggesting that the network formation is a [Ca2+]i-dependent process. Blockade of the T-type Ca2+ channel or silencing of α1G, the only voltage-gated Ca2+ channel subtype expressed in PMVECs, disrupts network formation. In contrast, blockade of canonical transient receptor potential (TRP) isoform 4 or TRP vanilloid 4, two other Ca2+ permeable channels expressed in PMVECs, has no effect on network formation. T-type Ca2+ channel blockade also reduces proliferation, cell-matrix adhesion, and migration, three major components of angiogenesis in PMVECs. An in vivo study demonstrated that the mice lacking α1G exhibited a profoundly impaired postinjury cell proliferation in the lungs following lipopolysaccharide challenge. Mechanistically, T-type Ca2+ channel blockade reduces Akt phosphorylation in a dose-dependent manner. Blockade of Akt or its upstream activator, phosphatidylinositol-3-kinase (PI3K), also impairs network formation. Altogether, these findings suggest a novel functional role for the α1G T-type Ca2+ channel to promote the cell's angiogenic potential via a PI3K-Akt signaling pathway.
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Affiliation(s)
- Zhen Zheng
- Department of Anesthesiology and Perioperative Medicine, University of Alabama at Birmingham , Birmingham, Alabama
| | - Hairu Chen
- Department of Anesthesiology and Perioperative Medicine, University of Alabama at Birmingham , Birmingham, Alabama
| | - Peilin Xie
- Department of Anesthesiology and Perioperative Medicine, University of Alabama at Birmingham , Birmingham, Alabama
| | - Carol A Dickerson
- Department of Anesthesiology and Perioperative Medicine, Medical College of Georgia, Augusta University , Augusta, Georgia
| | - Judy A C King
- Department of Pathology and Translational Pathobiology, Louisiana State University Health Sciences Center , Shreveport, Louisiana
| | - Mikhail F Alexeyev
- Center for Lung Biology and Department of Physiology and Cell Biology, University of South Alabama , Mobile, Alabama
| | - Songwei Wu
- Department of Anesthesiology and Perioperative Medicine, University of Alabama at Birmingham , Birmingham, Alabama
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25
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Brnardic EJ, Ye G, Brooks C, Donatelli C, Barton L, McAtee J, Sanchez RM, Shu A, Erhard K, Terrell L, Graczyk-Millbrandt G, He Y, Costell MH, Behm DJ, Roethke T, Stoy P, Holt DA, Lawhorn BG. Discovery of Pyrrolidine Sulfonamides as Selective and Orally Bioavailable Antagonists of Transient Receptor Potential Vanilloid-4 (TRPV4). J Med Chem 2018; 61:9738-9755. [PMID: 30335378 DOI: 10.1021/acs.jmedchem.8b01317] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
A novel series of pyrrolidine sulfonamide transient receptor potential vanilloid-4 (TRPV4) antagonists was developed by modification of a previously reported TRPV4 inhibitor (1). Several core-structure modifications were identified that improved TRPV4 activity by increasing structural rigidity and reducing the entropic energy penalty upon binding to the target protein. The new template was initially discovered as a minor regio-isomeric side product formed during routine structure-activity relationship (SAR) studies, and further optimization resulted in highly potent compounds with a novel pyrrolidine diol core. Further improvements in potency and pharmacokinetic properties were achieved through SAR studies on the sulfonamide substituent to give an optimized lead compound GSK3395879 (52) that demonstrated the ability to inhibit TRPV4-mediated pulmonary edema in an in vivo rat model. GSK3395879 is a tool for studying the biology of TRPV4 and an advanced lead for identifying new heart failure medicines.
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26
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Endothelial Protrusions in Junctional Integrity and Barrier Function. CURRENT TOPICS IN MEMBRANES 2018; 82:93-140. [PMID: 30360784 DOI: 10.1016/bs.ctm.2018.08.006] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Endothelial cells of the microcirculation form a semi-permeable diffusion barrier between the blood and tissues. This permeability of the endothelium, particularly in the capillaries and postcapillary venules, is a normal physiological function needed for blood-tissue exchange in the microcirculation. During inflammation, microvascular permeability increases dramatically and can lead to tissue edema, which in turn can lead to dysfunction of tissues and organs. The molecular mechanisms that control the barrier function of endothelial cells have been under investigation for several decades and remain an important topic due to the potential for discovery of novel therapeutic strategies to reduce edema. This review highlights current knowledge of the cellular and molecular mechanisms that lead to endothelial hyperpermeability during inflammatory conditions associated with injury and disease. This includes a discussion of recent findings demonstrating temporal protrusions by endothelial cells that may contribute to intercellular junction integrity between endothelial cells and affect the diffusion distance for solutes via the paracellular pathway.
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27
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Dagenais A, Desjardins J, Shabbir W, Roy A, Filion D, Sauvé R, Berthiaume Y. Loss of barrier integrity in alveolar epithelial cells downregulates ENaC expression and activity via Ca 2+ and TRPV4 activation. Pflugers Arch 2018; 470:1615-1631. [PMID: 30088081 DOI: 10.1007/s00424-018-2182-4] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2017] [Revised: 06/14/2018] [Accepted: 07/09/2018] [Indexed: 01/08/2023]
Abstract
The epithelial Na channel (ENaC) plays an essential role in lung physiology by modulating the amount of liquid lining the respiratory epithelium. Here, we tested the effect of breaking alveolar epithelial cell barrier integrity on ENaC expression and function. We found that either mechanical wounding by scratching the monolayer or disruption of tight junction with EDTA induced a ~ 50% decrease of α,β and γENaC mRNA expression and an 80% reduction of ENaC short-circuit current (Isc) at 6 h. Scratching the cell monolayer generated a Ca2+ wave that spread from the margin of the scratch to distant cells. Pretreatment with BAPTA-AM, an intracellular Ca2+ chelator, abolished the effect of mechanical wounding and EDTA on αENaC mRNA expression, suggesting that [Ca2+]i is important for this modulation. We tested the hypothesis that a mechanosensitive channel such as TRPV4, a cationic channel known to increase [Ca2+]i, could mediate this effect. Activation of the channel with the TRPV4 specific agonist GSK-1016790A (GSK) decreased αENAC mRNA expression and almost completely abolished ENaC Isc. Pretreatment of alveolar epithelial cells with HC-067047 (HC0), a specific TRPV4 antagonist, reduced the extent of αENAC mRNA downregulation by mechanical wounding and EDTA. Altogether, our results suggest that mechanical stress induced by wounding or TRPV4-mediated loss of tight junction increases [Ca2+]i and elicits a Ca2+ wave that affects ENaC expression and function away from the site of injury. These data are important to better understand how Ca2+ signaling affects lung liquid clearance in injured lungs.
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Affiliation(s)
- André Dagenais
- Institut de recherches cliniques de Montréal, 110 Avenue des Pins Ouest, Montreal, Quebec, H2W 1R7, Canada.
- Département de médecine, Université de Montréal, Montreal, Quebec, Canada.
| | - Julie Desjardins
- Institut de recherches cliniques de Montréal, 110 Avenue des Pins Ouest, Montreal, Quebec, H2W 1R7, Canada
| | - Waheed Shabbir
- Institute of Pharmacology and Toxicology, University of Vienna, Vienna, Austria
| | - Antoine Roy
- Institut de recherches cliniques de Montréal, 110 Avenue des Pins Ouest, Montreal, Quebec, H2W 1R7, Canada
| | - Dominic Filion
- Institut de recherches cliniques de Montréal, 110 Avenue des Pins Ouest, Montreal, Quebec, H2W 1R7, Canada
| | - Rémy Sauvé
- Département de pharmacologie et physiologie, Université de Montréal, Montreal, Quebec, Canada
| | - Yves Berthiaume
- Institut de recherches cliniques de Montréal, 110 Avenue des Pins Ouest, Montreal, Quebec, H2W 1R7, Canada
- Département de médecine, Université de Montréal, Montreal, Quebec, Canada
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28
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Hook JL, Islam MN, Parker D, Prince AS, Bhattacharya S, Bhattacharya J. Disruption of staphylococcal aggregation protects against lethal lung injury. J Clin Invest 2018; 128:1074-1086. [PMID: 29431734 DOI: 10.1172/jci95823] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2017] [Accepted: 01/04/2018] [Indexed: 01/23/2023] Open
Abstract
Infection by Staphylococcus aureus strain USA300 causes tissue injury, multiorgan failure, and high mortality. However, the mechanisms by which the bacteria adhere to, then stabilize on, mucosal surfaces before causing injury remain unclear. We addressed these issues through the first real-time determinations of USA300-alveolar interactions in live lungs. We found that within minutes, inhaled USA300 established stable, self-associated microaggregates in niches at curved, but not at flat, regions of the alveolar wall. The microaggregates released α-hemolysin toxin, causing localized alveolar injury, as indicated by epithelial dye loss, mitochondrial depolarization, and cytosolic Ca2+ increase. Spread of cytosolic Ca2+ through intercellular gap junctions to adjoining, uninfected alveoli caused pulmonary edema. Systemic pretreatment with vancomycin, a USA300-cidal antibiotic, failed to protect mice infected with inhaled WT USA300. However, vancomycin pretreatment markedly abrogated mortality in mice infected with mutant USA300 that lacked the aggregation-promoting factor PhnD. We interpret USA300-induced mortality as having resulted from rapid bacterial aggregation in alveolar niches. These findings indicate, for the first time to our knowledge, that alveolar microanatomy is critical in promoting the aggregation and, hence, in causing USA300-induced alveolar injury. We propose that in addition to antibiotics, strategies for bacterial disaggregation may constitute novel therapy against USA300-induced lung injury.
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Affiliation(s)
- Jaime L Hook
- Lung Biology Laboratory, Division of Pulmonary, Allergy, and Critical Care Medicine, Department of Medicine
| | - Mohammad N Islam
- Lung Biology Laboratory, Division of Pulmonary, Allergy, and Critical Care Medicine, Department of Medicine
| | | | | | - Sunita Bhattacharya
- Lung Biology Laboratory, Division of Pulmonary, Allergy, and Critical Care Medicine, Department of Medicine.,Department of Pediatrics, and
| | - Jahar Bhattacharya
- Lung Biology Laboratory, Division of Pulmonary, Allergy, and Critical Care Medicine, Department of Medicine.,Department of Physiology and Cellular Biophysics, College of Physicians and Surgeons, Columbia University Medical Center, New York, New York, USA
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29
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Hamacher J, Hadizamani Y, Borgmann M, Mohaupt M, Männel DN, Moehrlen U, Lucas R, Stammberger U. Cytokine-Ion Channel Interactions in Pulmonary Inflammation. Front Immunol 2018; 8:1644. [PMID: 29354115 PMCID: PMC5758508 DOI: 10.3389/fimmu.2017.01644] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2017] [Accepted: 11/10/2017] [Indexed: 12/12/2022] Open
Abstract
The lungs conceptually represent a sponge that is interposed in series in the bodies’ systemic circulation to take up oxygen and eliminate carbon dioxide. As such, it matches the huge surface areas of the alveolar epithelium to the pulmonary blood capillaries. The lung’s constant exposure to the exterior necessitates a competent immune system, as evidenced by the association of clinical immunodeficiencies with pulmonary infections. From the in utero to the postnatal and adult situation, there is an inherent vital need to manage alveolar fluid reabsorption, be it postnatally, or in case of hydrostatic or permeability edema. Whereas a wealth of literature exists on the physiological basis of fluid and solute reabsorption by ion channels and water pores, only sparse knowledge is available so far on pathological situations, such as in microbial infection, acute lung injury or acute respiratory distress syndrome, and in the pulmonary reimplantation response in transplanted lungs. The aim of this review is to discuss alveolar liquid clearance in a selection of lung injury models, thereby especially focusing on cytokines and mediators that modulate ion channels. Inflammation is characterized by complex and probably time-dependent co-signaling, interactions between the involved cell types, as well as by cell demise and barrier dysfunction, which may not uniquely determine a clinical picture. This review, therefore, aims to give integrative thoughts and wants to foster the unraveling of unmet needs in future research.
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Affiliation(s)
- Jürg Hamacher
- Internal Medicine and Pneumology, Lindenhofspital, Bern, Switzerland.,Internal Medicine V - Pneumology, Allergology, Respiratory and Environmental Medicine, Faculty of Medicine, Saarland University, Saarbrücken, Germany.,Lungen- und Atmungsstiftung Bern, Bern, Switzerland
| | - Yalda Hadizamani
- Internal Medicine and Pneumology, Lindenhofspital, Bern, Switzerland.,Lungen- und Atmungsstiftung Bern, Bern, Switzerland
| | - Michèle Borgmann
- Internal Medicine and Pneumology, Lindenhofspital, Bern, Switzerland.,Lungen- und Atmungsstiftung Bern, Bern, Switzerland
| | - Markus Mohaupt
- Internal Medicine, Sonnenhofspital Bern, Bern, Switzerland
| | | | - Ueli Moehrlen
- Paediatric Visceral Surgery, Universitäts-Kinderspital Zürich, Zürich, Switzerland
| | - Rudolf Lucas
- Department of Pharmacology and Toxicology, Vascular Biology Center, Medical College of Georgia, Augusta, GA, United States
| | - Uz Stammberger
- Lungen- und Atmungsstiftung Bern, Bern, Switzerland.,Novartis Institutes for Biomedical Research, Translational Clinical Oncology, Novartis Pharma AG, Basel, Switzerland
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30
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Schneberger D, Sethi RS, Singh B. Comparative View of Lung Vascular Endothelium of Cattle, Horses, and Water Buffalo. MOLECULAR AND FUNCTIONAL INSIGHTS INTO THE PULMONARY VASCULATURE 2018; 228:21-39. [DOI: 10.1007/978-3-319-68483-3_2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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31
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Ranchoux B, Harvey LD, Ayon RJ, Babicheva A, Bonnet S, Chan SY, Yuan JXJ, Perez VDJ. Endothelial dysfunction in pulmonary arterial hypertension: an evolving landscape (2017 Grover Conference Series). Pulm Circ 2018; 8:2045893217752912. [PMID: 29283043 PMCID: PMC5798691 DOI: 10.1177/2045893217752912] [Citation(s) in RCA: 90] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/23/2017] [Accepted: 12/18/2017] [Indexed: 02/06/2023] Open
Abstract
Endothelial dysfunction is a major player in the development and progression of vascular pathology in pulmonary arterial hypertension (PAH), a disease associated with small vessel loss and obstructive vasculopathy that leads to increased pulmonary vascular resistance, subsequent right heart failure, and premature death. Over the past ten years, there has been tremendous progress in our understanding of pulmonary endothelial biology as it pertains to the genetic and molecular mechanisms that orchestrate the endothelial response to direct or indirect injury, and how their dysregulation can contribute to the pathogenesis of PAH. As one of the major topics included in the 2017 Grover Conference Series, discussion centered on recent developments in four areas of pulmonary endothelial biology: (1) angiogenesis; (2) endothelial-mesenchymal transition (EndMT); (3) epigenetics; and (4) biology of voltage-gated ion channels. The present review will summarize the content of these discussions and provide a perspective on the most promising aspects of endothelial dysfunction that may be amenable for therapeutic development.
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Affiliation(s)
| | - Lloyd D. Harvey
- University of Pittsburgh Vascular Medicine Institute Division of Cardiology, Pittsburgh, PA, USA
| | - Ramon J. Ayon
- Division of Translational and Regenerative Medicine, The University of Arizona College of Medicine, Tucson, AZ, USA
| | - Aleksandra Babicheva
- Division of Translational and Regenerative Medicine, The University of Arizona College of Medicine, Tucson, AZ, USA
| | | | - Stephen Y. Chan
- University of Pittsburgh Vascular Medicine Institute Division of Cardiology, Pittsburgh, PA, USA
| | - Jason X.-J. Yuan
- Division of Translational and Regenerative Medicine, The University of Arizona College of Medicine, Tucson, AZ, USA
| | - Vinicio de Jesus Perez
- Division of Pulmonary and Critical Care Medicine, Stanford University Medical Center, Stanford, CA, USA
- The Vera Moulton Wall Center for Pulmonary Vascular Medicine, Stanford University Medical Center, Stanford, CA, USA
- Stanford Cardiovascular Institute, Stanford University Medical Center, Stanford, CA, USA
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32
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Huetsch JC, Suresh K, Shimoda LA. When higher cholesterol is better: membrane cholesterol loss and endothelial Ca 2+ signaling. Am J Physiol Heart Circ Physiol 2017; 314:H780-H783. [PMID: 29351471 DOI: 10.1152/ajpheart.00655.2017] [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: 11/22/2022]
Affiliation(s)
- John C Huetsch
- Division of Pulmonary and Critical Care Medicine, Department of Medicine, Johns Hopkins School of Medicine , Baltimore, Maryland
| | - Karthik Suresh
- Division of Pulmonary and Critical Care Medicine, Department of Medicine, Johns Hopkins School of Medicine , Baltimore, Maryland
| | - Larissa A Shimoda
- Division of Pulmonary and Critical Care Medicine, Department of Medicine, Johns Hopkins School of Medicine , Baltimore, Maryland
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33
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Abstract
This brief review assesses the role of Ca2+ signaling in lung endothelium in regulation of endothelial permeability. The disconnect between experimental and clinical outcomes to date may be due, in part, to the use of tools which yield information about aggregate permeability or Ca2+ responses in lung or in endothelial monolayers. The teaching point of this review is to “unpack the box,” i.e. consider the many potential issues which could impact interpretation of outcomes. These include phenotypic heterogeneity and resultant segment-specific permeability responses, methodologic issues related to permeability measures, contributions from Ca2+ channels in cells other than endothelium—such as alveolar macrophages or blood leukocytes), Ca2+ dynamic patterns, rather than averaged Ca2+ responses to channel activation, and the background context, such as changes in endothelial bioenergetics with sepsis. Any or all of these issues might color interpretation of permeability and Ca2+ signaling in lung.
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Affiliation(s)
- Mary I Townsley
- 12214 Department of Physiology & Cell Biology, University of South Alabama, Mobile, AL, USA
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34
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Dual contribution of TRPV4 antagonism in the regulatory effect of vasoinhibins on blood-retinal barrier permeability: diabetic milieu makes a difference. Sci Rep 2017; 7:13094. [PMID: 29026201 PMCID: PMC5638810 DOI: 10.1038/s41598-017-13621-8] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2016] [Accepted: 09/29/2017] [Indexed: 01/05/2023] Open
Abstract
Breakdown of the blood-retinal barrier (BRB), as occurs in diabetic retinopathy and other chronic retinal diseases, results in vasogenic edema and neural tissue damage, causing vision loss. Vasoinhibins are N-terminal fragments of prolactin that prevent BRB breakdown during diabetes. They modulate the expression of some transient receptor potential (TRP) family members, yet their role in regulating the TRP vanilloid subtype 4 (TRPV4) remains unknown. TRPV4 is a calcium-permeable channel involved in barrier permeability, which blockade has been shown to prevent and resolve pulmonary edema. We found TRPV4 expression in the endothelium and retinal pigment epithelium (RPE) components of the BRB, and that TRPV4-selective antagonists (RN-1734 and GSK2193874) resolve BRB breakdown in diabetic rats. Using human RPE (ARPE-19) cell monolayers and endothelial cell systems, we further observed that (i) GSK2193874 does not seem to contribute to the regulation of BRB and RPE permeability by vasoinhibins under diabetic or hyperglycemic-mimicking conditions, but that (ii) vasoinhibins can block TRPV4 to maintain BRB and endothelial permeability. Our results provide important insights into the pathogenesis of diabetic retinopathy that will further guide us toward rationally-guided new therapies: synergistic combination of selective TRPV4 blockers and vasoinhibins can be proposed to mitigate diabetes-evoked BRB breakdown.
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35
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Cheung M, Bao W, Behm DJ, Brooks CA, Bury MJ, Dowdell SE, Eidam HS, Fox RM, Goodman KB, Holt DA, Lee D, Roethke TJ, Willette RN, Xu X, Ye G, Thorneloe KS. Discovery of GSK2193874: An Orally Active, Potent, and Selective Blocker of Transient Receptor Potential Vanilloid 4. ACS Med Chem Lett 2017; 8:549-554. [PMID: 28523109 DOI: 10.1021/acsmedchemlett.7b00094] [Citation(s) in RCA: 56] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2017] [Accepted: 03/20/2017] [Indexed: 12/16/2022] Open
Abstract
Transient Receptor Potential Vanilloid 4 (TRPV4) is a member of the Transient Receptor Potential (TRP) superfamily of cation channels. TRPV4 is expressed in the vascular endothelium in the lung and regulates the integrity of the alveolar septal barrier. Increased pulmonary vascular pressure evokes TRPV4-dependent pulmonary edema, and therefore, inhibition of TRPV4 represents a novel approach for the treatment of pulmonary edema associated with conditions such as congestive heart failure. Herein we report the discovery of an orally active, potent, and selective TRPV4 blocker, 3-(1,4'-bipiperidin-1'-ylmethyl)-7-bromo-N-(1-phenylcyclopropyl)-2-[3-(trifluoromethyl)phenyl]-4-quinolinecarboxamide (GSK2193874, 28) after addressing an unexpected off-target cardiovascular liability observed from in vivo studies. GSK2193874 is a selective tool for elucidating TRPV4 biology both in vitro and in vivo.
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Affiliation(s)
- Mui Cheung
- GlaxoSmithKline, Heart Failure
Discovery Performance Unit, Metabolic Pathways and
Cardiovascular Therapeutic Area, King of Prussia, Pennsylvania 19406, United States
| | - Weike Bao
- GlaxoSmithKline, Heart Failure
Discovery Performance Unit, Metabolic Pathways and
Cardiovascular Therapeutic Area, King of Prussia, Pennsylvania 19406, United States
| | - David J. Behm
- GlaxoSmithKline, Heart Failure
Discovery Performance Unit, Metabolic Pathways and
Cardiovascular Therapeutic Area, King of Prussia, Pennsylvania 19406, United States
| | - Carl A. Brooks
- GlaxoSmithKline, Heart Failure
Discovery Performance Unit, Metabolic Pathways and
Cardiovascular Therapeutic Area, King of Prussia, Pennsylvania 19406, United States
| | - Michael J. Bury
- GlaxoSmithKline, Heart Failure
Discovery Performance Unit, Metabolic Pathways and
Cardiovascular Therapeutic Area, King of Prussia, Pennsylvania 19406, United States
| | - Sarah E. Dowdell
- GlaxoSmithKline, Heart Failure
Discovery Performance Unit, Metabolic Pathways and
Cardiovascular Therapeutic Area, King of Prussia, Pennsylvania 19406, United States
| | - Hilary S. Eidam
- GlaxoSmithKline, Heart Failure
Discovery Performance Unit, Metabolic Pathways and
Cardiovascular Therapeutic Area, King of Prussia, Pennsylvania 19406, United States
| | - Ryan M. Fox
- GlaxoSmithKline, Heart Failure
Discovery Performance Unit, Metabolic Pathways and
Cardiovascular Therapeutic Area, King of Prussia, Pennsylvania 19406, United States
| | - Krista B. Goodman
- GlaxoSmithKline, Heart Failure
Discovery Performance Unit, Metabolic Pathways and
Cardiovascular Therapeutic Area, King of Prussia, Pennsylvania 19406, United States
| | - Dennis A. Holt
- GlaxoSmithKline, Heart Failure
Discovery Performance Unit, Metabolic Pathways and
Cardiovascular Therapeutic Area, King of Prussia, Pennsylvania 19406, United States
| | - Dennis Lee
- GlaxoSmithKline, Heart Failure
Discovery Performance Unit, Metabolic Pathways and
Cardiovascular Therapeutic Area, King of Prussia, Pennsylvania 19406, United States
| | - Theresa J. Roethke
- GlaxoSmithKline, Heart Failure
Discovery Performance Unit, Metabolic Pathways and
Cardiovascular Therapeutic Area, King of Prussia, Pennsylvania 19406, United States
| | - Robert N. Willette
- GlaxoSmithKline, Heart Failure
Discovery Performance Unit, Metabolic Pathways and
Cardiovascular Therapeutic Area, King of Prussia, Pennsylvania 19406, United States
| | - Xiaoping Xu
- GlaxoSmithKline, Heart Failure
Discovery Performance Unit, Metabolic Pathways and
Cardiovascular Therapeutic Area, King of Prussia, Pennsylvania 19406, United States
| | - Guosen Ye
- GlaxoSmithKline, Heart Failure
Discovery Performance Unit, Metabolic Pathways and
Cardiovascular Therapeutic Area, King of Prussia, Pennsylvania 19406, United States
| | - Kevin S. Thorneloe
- GlaxoSmithKline, Heart Failure
Discovery Performance Unit, Metabolic Pathways and
Cardiovascular Therapeutic Area, King of Prussia, Pennsylvania 19406, United States
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36
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Scheraga RG, Southern BD, Grove LM, Olman MA. The Role of Transient Receptor Potential Vanilloid 4 in Pulmonary Inflammatory Diseases. Front Immunol 2017; 8:503. [PMID: 28523001 PMCID: PMC5415870 DOI: 10.3389/fimmu.2017.00503] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2017] [Accepted: 04/12/2017] [Indexed: 01/01/2023] Open
Abstract
Ion channels/pumps are essential regulators of organ homeostasis and disease. In the present review, we discuss the role of the mechanosensitive cation channel, transient receptor potential vanilloid 4 (TRPV4), in cytokine secretion and pulmonary inflammatory diseases such as asthma, cystic fibrosis (CF), and acute lung injury/acute respiratory distress syndrome (ARDS). TRPV4 has been shown to play a role in lung diseases associated with lung parenchymal stretch or stiffness. TRPV4 indirectly mediates hypotonicity-induced smooth muscle contraction and airway remodeling in asthma. Further, the literature suggests that in CF TRPV4 may improve ciliary beat frequency enhancing mucociliary clearance, while at the same time increasing pro-inflammatory cytokine secretion/lung tissue injury. Currently it is understood that the role of TRPV4 in immune cell function and associated lung tissue injury/ARDS may depend on the injury stimulus. Uncovering the downstream mechanisms of TRPV4 action in pulmonary inflammatory diseases is likely important to understanding disease pathogenesis and may lead to novel therapeutics.
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Affiliation(s)
- Rachel G Scheraga
- Cleveland Clinic, Department of Pathobiology, Lerner Research Institute, Cleveland, OH, USA
| | - Brian D Southern
- Cleveland Clinic, Department of Pathobiology, Lerner Research Institute, Cleveland, OH, USA
| | - Lisa M Grove
- Cleveland Clinic, Department of Pathobiology, Lerner Research Institute, Cleveland, OH, USA
| | - Mitchell A Olman
- Cleveland Clinic, Department of Pathobiology, Lerner Research Institute, Cleveland, OH, USA
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37
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White JPM, Cibelli M, Urban L, Nilius B, McGeown JG, Nagy I. TRPV4: Molecular Conductor of a Diverse Orchestra. Physiol Rev 2017; 96:911-73. [PMID: 27252279 DOI: 10.1152/physrev.00016.2015] [Citation(s) in RCA: 259] [Impact Index Per Article: 37.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
Transient receptor potential vanilloid type 4 (TRPV4) is a calcium-permeable nonselective cation channel, originally described in 2000 by research teams led by Schultz (Nat Cell Biol 2: 695-702, 2000) and Liedtke (Cell 103: 525-535, 2000). TRPV4 is now recognized as being a polymodal ionotropic receptor that is activated by a disparate array of stimuli, ranging from hypotonicity to heat and acidic pH. Importantly, this ion channel is constitutively expressed and capable of spontaneous activity in the absence of agonist stimulation, which suggests that it serves important physiological functions, as does its widespread dissemination throughout the body and its capacity to interact with other proteins. Not surprisingly, therefore, it has emerged more recently that TRPV4 fulfills a great number of important physiological roles and that various disease states are attributable to the absence, or abnormal functioning, of this ion channel. Here, we review the known characteristics of this ion channel's structure, localization and function, including its activators, and examine its functional importance in health and disease.
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Affiliation(s)
- John P M White
- Anaesthetics, Pain Medicine and Intensive Care Section, Department of Surgery and Cancer, Imperial College London, London, United Kingdom; Department of Anaesthetics, The Queen Elizabeth Hospital, Birmingham, United Kingdom; Academic Department of Anaesthesia and Intensive Care Medicine, School of Clinical and Experimental Medicine, University of Birmingham, Birmingham, United Kingdom; Preclinical Secondary Pharmacology, Preclinical Safety, Novartis Institute for Biomedical Research, Cambridge, Massachusetts; Laboratory of Ion Channel Research, Department of Cellular and Molecular Medicine, KU Leuven, Campus Gasthuisberg, Leuven, Belgium; and School of Medicine, Dentistry and Biomedical Science, Queen's University Belfast, Belfast, United Kingdom
| | - Mario Cibelli
- Anaesthetics, Pain Medicine and Intensive Care Section, Department of Surgery and Cancer, Imperial College London, London, United Kingdom; Department of Anaesthetics, The Queen Elizabeth Hospital, Birmingham, United Kingdom; Academic Department of Anaesthesia and Intensive Care Medicine, School of Clinical and Experimental Medicine, University of Birmingham, Birmingham, United Kingdom; Preclinical Secondary Pharmacology, Preclinical Safety, Novartis Institute for Biomedical Research, Cambridge, Massachusetts; Laboratory of Ion Channel Research, Department of Cellular and Molecular Medicine, KU Leuven, Campus Gasthuisberg, Leuven, Belgium; and School of Medicine, Dentistry and Biomedical Science, Queen's University Belfast, Belfast, United Kingdom
| | - Laszlo Urban
- Anaesthetics, Pain Medicine and Intensive Care Section, Department of Surgery and Cancer, Imperial College London, London, United Kingdom; Department of Anaesthetics, The Queen Elizabeth Hospital, Birmingham, United Kingdom; Academic Department of Anaesthesia and Intensive Care Medicine, School of Clinical and Experimental Medicine, University of Birmingham, Birmingham, United Kingdom; Preclinical Secondary Pharmacology, Preclinical Safety, Novartis Institute for Biomedical Research, Cambridge, Massachusetts; Laboratory of Ion Channel Research, Department of Cellular and Molecular Medicine, KU Leuven, Campus Gasthuisberg, Leuven, Belgium; and School of Medicine, Dentistry and Biomedical Science, Queen's University Belfast, Belfast, United Kingdom
| | - Bernd Nilius
- Anaesthetics, Pain Medicine and Intensive Care Section, Department of Surgery and Cancer, Imperial College London, London, United Kingdom; Department of Anaesthetics, The Queen Elizabeth Hospital, Birmingham, United Kingdom; Academic Department of Anaesthesia and Intensive Care Medicine, School of Clinical and Experimental Medicine, University of Birmingham, Birmingham, United Kingdom; Preclinical Secondary Pharmacology, Preclinical Safety, Novartis Institute for Biomedical Research, Cambridge, Massachusetts; Laboratory of Ion Channel Research, Department of Cellular and Molecular Medicine, KU Leuven, Campus Gasthuisberg, Leuven, Belgium; and School of Medicine, Dentistry and Biomedical Science, Queen's University Belfast, Belfast, United Kingdom
| | - J Graham McGeown
- Anaesthetics, Pain Medicine and Intensive Care Section, Department of Surgery and Cancer, Imperial College London, London, United Kingdom; Department of Anaesthetics, The Queen Elizabeth Hospital, Birmingham, United Kingdom; Academic Department of Anaesthesia and Intensive Care Medicine, School of Clinical and Experimental Medicine, University of Birmingham, Birmingham, United Kingdom; Preclinical Secondary Pharmacology, Preclinical Safety, Novartis Institute for Biomedical Research, Cambridge, Massachusetts; Laboratory of Ion Channel Research, Department of Cellular and Molecular Medicine, KU Leuven, Campus Gasthuisberg, Leuven, Belgium; and School of Medicine, Dentistry and Biomedical Science, Queen's University Belfast, Belfast, United Kingdom
| | - Istvan Nagy
- Anaesthetics, Pain Medicine and Intensive Care Section, Department of Surgery and Cancer, Imperial College London, London, United Kingdom; Department of Anaesthetics, The Queen Elizabeth Hospital, Birmingham, United Kingdom; Academic Department of Anaesthesia and Intensive Care Medicine, School of Clinical and Experimental Medicine, University of Birmingham, Birmingham, United Kingdom; Preclinical Secondary Pharmacology, Preclinical Safety, Novartis Institute for Biomedical Research, Cambridge, Massachusetts; Laboratory of Ion Channel Research, Department of Cellular and Molecular Medicine, KU Leuven, Campus Gasthuisberg, Leuven, Belgium; and School of Medicine, Dentistry and Biomedical Science, Queen's University Belfast, Belfast, United Kingdom
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Dietrich A, Steinritz D, Gudermann T. Transient receptor potential (TRP) channels as molecular targets in lung toxicology and associated diseases. Cell Calcium 2017; 67:123-137. [PMID: 28499580 DOI: 10.1016/j.ceca.2017.04.005] [Citation(s) in RCA: 45] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2017] [Revised: 04/21/2017] [Accepted: 04/21/2017] [Indexed: 12/24/2022]
Abstract
The lungs as the gateways of our body to the external environment are essential for gas exchange. They are also exposed to toxicants from two sides, the airways and the vasculature. Apart from naturally produced toxic agents, millions of human made chemicals were produced since the beginning of the industrial revolution whose toxicity still needs to be determined. While the knowledge about toxic substances is increasing only slowly, a paradigm shift regarding the proposed mechanisms of toxicity at the plasma membrane emerged. According to their broad-range chemical reactivity, the mechanism of lung injury evoked by these agents has long been described as rather unspecific. Consequently, therapeutic options are still restricted to symptomatic treatment. The identification of molecular down-stream effectors in cells was a major step forward in the mechanistic understanding of the action of toxic chemicals and will pave the way for more causal and specific toxicity testing as well as therapeutic options. In this context, the involvement of Transient Receptor Potential (TRP) channels as chemosensors involved in the detection and effectors of toxicant action is an attractive concept intensively discussed in the scientific community. In this review we will summarize recent evidence for an involvement of TRP channels (TRPA1, TRPC4, TRPC6, TRPV1, TRPV4, TRPM2 and TRPM8) expressed in the lung in pathways of toxin sensing and as mediators of lung inflammation and associated diseases like asthma, COPD, lung fibrosis and edema formation. Specific modulators of these channels may offer new therapeutic options in the future and will endorse strategies for a causal, specifically tailored treatment based on the mechanistic understanding of molecular events induced by lung-toxic agents.
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Affiliation(s)
- Alexander Dietrich
- Walther-Straub-Institute of Pharmacology and Toxicology, Member of the German Center for Lung Research (DZL), LMU Munich, Germany.
| | - Dirk Steinritz
- Walther-Straub-Institute of Pharmacology and Toxicology, Member of the German Center for Lung Research (DZL), LMU Munich, Germany; Bundeswehr-Institute of Pharmacology and Toxicology, Munich, Germany
| | - Thomas Gudermann
- Walther-Straub-Institute of Pharmacology and Toxicology, Member of the German Center for Lung Research (DZL), LMU Munich, Germany
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Gilbert G, Courtois A, Dubois M, Cussac LA, Ducret T, Lory P, Marthan R, Savineau JP, Quignard JF. T-type voltage gated calcium channels are involved in endothelium-dependent relaxation of mice pulmonary artery. Biochem Pharmacol 2017; 138:61-72. [PMID: 28438566 DOI: 10.1016/j.bcp.2017.04.021] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2016] [Accepted: 04/18/2017] [Indexed: 10/19/2022]
Abstract
In pulmonary arterial endothelial cells, Ca2+ channels and intracellular Ca2+ concentration ([Ca2+]i) control the release of vasorelaxant factors such as nitric oxide and are involved in the regulation of pulmonary arterial blood pressure. The present study was undertaken to investigate the implication of T-type voltage-gated Ca2+ channels (T-VGCCs, Cav3.1 channel) in the endothelium-dependent relaxation of intrapulmonary arteries. Relaxation was quantified by means of a myograph in wild type and Cav3.1-/- mice. Endothelial [Ca2+]i and NO production were measured, on whole vessels, with the fluo-4 and DAF-fm probes. Acetylcholine (ACh) induced a nitric oxide- and endothelium-dependent relaxation that was significantly reduced in pulmonary arteries from Cav3.1-/- compared to wild type mice as well as in the presence of T-VGCC inhibitors (NNC 55-0396 or mibefradil). ACh also increased endothelial [Ca2+]i and NO production that were both reduced in Cav3.1-/- compared to wild type mice or in the presence of T-VGCC inhibitors. Immunofluorescence labeling revealed the presence of Cav3.1 channels in endothelial cells that co-localized with endothelial nitric oxide synthase in arteries from wild type mice. TRPV4-, beta2 adrenergic- and nitric oxide donors (SNP)-mediated relaxation were not altered in Cav3.1-/- compared to wild type mice. Finally, in chronically hypoxic mice, a model of pulmonary hypertension, ACh relaxation was reduced but still depended on Cav3.1 channels activity. The present study thus demonstrates that T-VGCCs, mainly Cav3.1 channel, contribute to intrapulmonary vascular reactivity in mice by controlling endothelial [Ca2+]i and ACh-mediated relaxation.
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Affiliation(s)
- Guillaume Gilbert
- Univ Bordeaux, Centre de Recherche Cardio-Thoracique de Bordeaux, Bordeaux F-33000, France; Inserm, Centre de Recherche Cardio-Thoracique de Bordeaux, U1045, Bordeaux F-33000, France
| | - Arnaud Courtois
- Univ Bordeaux, Centre de Recherche Cardio-Thoracique de Bordeaux, Bordeaux F-33000, France; Inserm, Centre de Recherche Cardio-Thoracique de Bordeaux, U1045, Bordeaux F-33000, France
| | - Mathilde Dubois
- Univ Bordeaux, Centre de Recherche Cardio-Thoracique de Bordeaux, Bordeaux F-33000, France; Inserm, Centre de Recherche Cardio-Thoracique de Bordeaux, U1045, Bordeaux F-33000, France
| | - Laure-Anne Cussac
- Univ Bordeaux, Centre de Recherche Cardio-Thoracique de Bordeaux, Bordeaux F-33000, France; Inserm, Centre de Recherche Cardio-Thoracique de Bordeaux, U1045, Bordeaux F-33000, France
| | - Thomas Ducret
- Univ Bordeaux, Centre de Recherche Cardio-Thoracique de Bordeaux, Bordeaux F-33000, France; Inserm, Centre de Recherche Cardio-Thoracique de Bordeaux, U1045, Bordeaux F-33000, France
| | - Philippe Lory
- CNRS, UMR-5203, Institut de Génomique Fonctionnelle, Montpellier F-34094, France; Inserm U1191, Montpellier F-34094, France; Université de Montpellier, Montpellier F-34094, France; LabEx 'Ion Channel Science and Therapeutics', Montpellier F-34094, France
| | - Roger Marthan
- Univ Bordeaux, Centre de Recherche Cardio-Thoracique de Bordeaux, Bordeaux F-33000, France; Inserm, Centre de Recherche Cardio-Thoracique de Bordeaux, U1045, Bordeaux F-33000, France; CHU de Bordeaux, Bordeaux F-33000, France
| | - Jean-Pierre Savineau
- Univ Bordeaux, Centre de Recherche Cardio-Thoracique de Bordeaux, Bordeaux F-33000, France; Inserm, Centre de Recherche Cardio-Thoracique de Bordeaux, U1045, Bordeaux F-33000, France
| | - Jean-François Quignard
- Univ Bordeaux, Centre de Recherche Cardio-Thoracique de Bordeaux, Bordeaux F-33000, France; Inserm, Centre de Recherche Cardio-Thoracique de Bordeaux, U1045, Bordeaux F-33000, France.
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Martínez-Rendón J, Sánchez-Guzmán E, Rueda A, González J, Gulias-Cañizo R, Aquino-Jarquín G, Castro-Muñozledo F, García-Villegas R. TRPV4 Regulates Tight Junctions and Affects Differentiation in a Cell Culture Model of the Corneal Epithelium. J Cell Physiol 2016; 232:1794-1807. [PMID: 27869310 DOI: 10.1002/jcp.25698] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2016] [Accepted: 11/17/2016] [Indexed: 11/09/2022]
Abstract
TRPV4 (transient receptor potential vanilloid 4) is a cation channel activated by hypotonicity, moderate heat, or shear stress. We describe the expression of TRPV4 during the differentiation of a corneal epithelial cell model, RCE1(5T5) cells. TRPV4 is a late differentiation feature that is concentrated in the apical membrane of the outmost cell layer of the stratified epithelia. Ca2+ imaging experiments showed that TRPV4 activation with GSK1016790A produced an influx of calcium that was blunted by the specific TRPV4 blocker RN-1734. We analyzed the involvement of TRPV4 in RCE1(5T5) epithelial differentiation by measuring the development of transepithelial electrical resistance (TER) as an indicator of the tight junction (TJ) assembly. We showed that TRPV4 activity was necessary to establish the TJ. In differentiated epithelia, activation of TRPV4 increases the TER and the accumulation of claudin-4 in cell-cell contacts. Epidermal Growth Factor (EGF) up-regulates the TER of corneal epithelial cultures, and we show here that TRPV4 activation mimicked this EGF effect. Conversely, TRPV4 inhibition or knock down by specific shRNA prevented the increase in TER. Moreover, TRPP2, an EGF-activated channel that forms heteromeric complexes with TRPV4, is also concentrated in the outmost cell layer of differentiated RCE1(5T5) sheets. This suggests that the EGF regulation of the TJ may involve a heterotetrameric TRPV4-TRPP2 channel. These results demonstrated TRPV4 activity was necessary for the correct establishment of TJ in corneal epithelia and as well as the regulation of both the barrier function of TJ and its ability to respond to EGF. J. Cell. Physiol. 232: 1794-1807, 2017. © 2016 Wiley Periodicals, Inc.
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Affiliation(s)
- Jacqueline Martínez-Rendón
- Departamento de Fisiología, Biofísica y Neurociencias, Centro de Investigación y de Estudios Avanzados del IPN, Ciudad de México, México
| | - Erika Sánchez-Guzmán
- Departamento de Biología Celular, Centro de Investigación y de Estudios Avanzados del IPN, Ciudad de México, México
| | - Angélica Rueda
- Departamento de Bioquímica, Centro de Investigación y de Estudios Avanzados del IPN, Ciudad de México, México
| | - James González
- Departamento de Fisiología, Biofísica y Neurociencias, Centro de Investigación y de Estudios Avanzados del IPN, Ciudad de México, México
| | - Rosario Gulias-Cañizo
- Departamento de Biología Celular, Centro de Investigación y de Estudios Avanzados del IPN, Ciudad de México, México
| | - Guillermo Aquino-Jarquín
- Departamento de Fisiología, Biofísica y Neurociencias, Centro de Investigación y de Estudios Avanzados del IPN, Ciudad de México, México
| | - Federico Castro-Muñozledo
- Departamento de Biología Celular, Centro de Investigación y de Estudios Avanzados del IPN, Ciudad de México, México
| | - Refugio García-Villegas
- Departamento de Fisiología, Biofísica y Neurociencias, Centro de Investigación y de Estudios Avanzados del IPN, Ciudad de México, México
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Henry CO, Dalloneau E, Pérez-Berezo MT, Plata C, Wu Y, Guillon A, Morello E, Aimar RF, Potier-Cartereau M, Esnard F, Coraux C, Börnchen C, Kiefmann R, Vandier C, Touqui L, Valverde MA, Cenac N, Si-Tahar M. In vitro and in vivo evidence for an inflammatory role of the calcium channel TRPV4 in lung epithelium: Potential involvement in cystic fibrosis. Am J Physiol Lung Cell Mol Physiol 2016; 311:L664-75. [PMID: 27496898 DOI: 10.1152/ajplung.00442.2015] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2015] [Accepted: 07/26/2016] [Indexed: 12/22/2022] Open
Abstract
Cystic fibrosis (CF) is an inherited disease associated with chronic severe lung inflammation, leading to premature death. To develop innovative anti-inflammatory treatments, we need to characterize new cellular and molecular components contributing to the mechanisms of lung inflammation. Here, we focused on the potential role of "transient receptor potential vanilloid-4" (TRPV4), a nonselective calcium channel. We used both in vitro and in vivo approaches to demonstrate that TRPV4 expressed in airway epithelial cells triggers the secretion of major proinflammatory mediators such as chemokines and biologically active lipids, as well as a neutrophil recruitment in lung tissues. We characterized the contribution of cytosolic phospholipase A2, MAPKs, and NF-κB in TRPV4-dependent signaling. We also showed that 5,6-, 8,9-, 11,12-, and 14,15-epoxyeicosatrienoic acids, i.e., four natural lipid-based TRPV4 agonists, are present in expectorations of CF patients. Also, TRPV4-induced calcium mobilization and inflammatory responses were enhanced in cystic fibrosis transmembrane conductance regulator-deficient cellular and animal models, suggesting that TRPV4 is a promising target for the development of new anti-inflammatory treatments for diseases such as CF.
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Affiliation(s)
- Clémence O Henry
- Inserm U1100, Centre d'Etude des Pathologies Respiratoires, Tours, France; Université François Rabelais, Tours, France
| | - Emilie Dalloneau
- Inserm U1100, Centre d'Etude des Pathologies Respiratoires, Tours, France; Université François Rabelais, Tours, France
| | - Maria-Teresa Pérez-Berezo
- Centre de Physiopathologie de Toulouse Purpan, Inserm U1043, Toulouse, France; CNRS U5282, Toulouse, France; Université Toulouse III Paul-Sabatier, Toulouse, France
| | - Cristina Plata
- Laboratory of Molecular Physiology and Channelopathies, Department of Experimental and Health Sciences, Universitat Pompeu Fabra, Barcelona, Spain
| | - Yongzheng Wu
- Unité de Défense Innée et Inflammation, Inserm U874, Institut Pasteur, Paris, France
| | - Antoine Guillon
- Inserm U1100, Centre d'Etude des Pathologies Respiratoires, Tours, France; Université François Rabelais, Tours, France; Service de Réanimation Polyvalente, Centre Hospitalier Régional Universitaire de Tours, Tours, France
| | - Eric Morello
- Inserm U1100, Centre d'Etude des Pathologies Respiratoires, Tours, France; Université François Rabelais, Tours, France
| | - Rose-France Aimar
- Inserm U1100, Centre d'Etude des Pathologies Respiratoires, Tours, France; Université François Rabelais, Tours, France
| | - Marie Potier-Cartereau
- Université François Rabelais, Tours, France; Inserm UMR1069, Nutrition, Croissance et Cancer, Tours, France; Ion Channels and Cancer network-Canceropole Grand Ouest, Tours, France
| | - Frédéric Esnard
- Inserm U1100, Centre d'Etude des Pathologies Respiratoires, Tours, France; Université François Rabelais, Tours, France
| | - Christelle Coraux
- Inserm UMR-S 903, SFR CAP-SANTE (FED 4231), Université de Champagne-Ardenne, Reims, France
| | - Christian Börnchen
- Cardiovascular Research Center Hamburg and German Center for Cardiovascular Research, University Medical Center Hamburg-Eppendorf, Hamburg, Germany; and Department of Anaesthesiology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Rainer Kiefmann
- Cardiovascular Research Center Hamburg and German Center for Cardiovascular Research, University Medical Center Hamburg-Eppendorf, Hamburg, Germany; and Department of Anaesthesiology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Christophe Vandier
- Université François Rabelais, Tours, France; Inserm UMR1069, Nutrition, Croissance et Cancer, Tours, France; Ion Channels and Cancer network-Canceropole Grand Ouest, Tours, France
| | - Lhousseine Touqui
- Unité de Défense Innée et Inflammation, Inserm U874, Institut Pasteur, Paris, France
| | - Miguel A Valverde
- Laboratory of Molecular Physiology and Channelopathies, Department of Experimental and Health Sciences, Universitat Pompeu Fabra, Barcelona, Spain
| | - Nicolas Cenac
- Centre de Physiopathologie de Toulouse Purpan, Inserm U1043, Toulouse, France; CNRS U5282, Toulouse, France; Université Toulouse III Paul-Sabatier, Toulouse, France
| | - Mustapha Si-Tahar
- Inserm U1100, Centre d'Etude des Pathologies Respiratoires, Tours, France; Université François Rabelais, Tours, France;
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42
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Dembla S, Hasan N, Becker A, Beck A, Philipp SE. Transient receptor potential A1 channels regulate epithelial cell barriers formed by MDCK cells. FEBS Lett 2016; 590:1509-20. [DOI: 10.1002/1873-3468.12183] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2016] [Revised: 03/18/2016] [Accepted: 04/10/2016] [Indexed: 12/20/2022]
Affiliation(s)
- Sandeep Dembla
- Experimentelle und Klinische Pharmakologie und Toxikologie; Universität des Saarlandes; Homburg Germany
| | - Nouma Hasan
- Experimentelle und Klinische Pharmakologie und Toxikologie; Universität des Saarlandes; Homburg Germany
| | - Alexander Becker
- Experimentelle und Klinische Pharmakologie und Toxikologie; Universität des Saarlandes; Homburg Germany
| | - Andreas Beck
- Experimentelle und Klinische Pharmakologie und Toxikologie; Universität des Saarlandes; Homburg Germany
| | - Stephan Ernst Philipp
- Experimentelle und Klinische Pharmakologie und Toxikologie; Universität des Saarlandes; Homburg Germany
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43
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Yin J, Michalick L, Tang C, Tabuchi A, Goldenberg N, Dan Q, Awwad K, Wang L, Erfinanda L, Nouailles G, Witzenrath M, Vogelzang A, Lv L, Lee WL, Zhang H, Rotstein O, Kapus A, Szaszi K, Fleming I, Liedtke WB, Kuppe H, Kuebler WM. Role of Transient Receptor Potential Vanilloid 4 in Neutrophil Activation and Acute Lung Injury. Am J Respir Cell Mol Biol 2016; 54:370-383. [DOI: 10.1165/rcmb.2014-0225oc] [Citation(s) in RCA: 85] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/30/2023] Open
Affiliation(s)
- Jun Yin
- Department of Cardiothoracic Surgery, Affiliated People’s Hospital of Jiangsu University, Zhenjiang, China
- Keenan Research Centre for Biomedical Science, St. Michael’s Hospital, Toronto, Ontario, Canada
| | - Laura Michalick
- Institute of Physiology, Charité Universitätsmedizin Berlin, Berlin, Germany
| | - Christine Tang
- Keenan Research Centre for Biomedical Science, St. Michael’s Hospital, Toronto, Ontario, Canada
- Department of Medicine, University of Toronto, Toronto, Ontario, Canada
| | - Arata Tabuchi
- Keenan Research Centre for Biomedical Science, St. Michael’s Hospital, Toronto, Ontario, Canada
| | - Neil Goldenberg
- Keenan Research Centre for Biomedical Science, St. Michael’s Hospital, Toronto, Ontario, Canada
| | - Qinghong Dan
- Keenan Research Centre for Biomedical Science, St. Michael’s Hospital, Toronto, Ontario, Canada
| | - Khader Awwad
- Institute for Vascular Signaling, Center for Molecular Medicine, Goethe University Frankfurt, Frankfurt, Germany
| | - Liming Wang
- Department of Cardiothoracic Surgery, Affiliated People’s Hospital of Jiangsu University, Zhenjiang, China
- Keenan Research Centre for Biomedical Science, St. Michael’s Hospital, Toronto, Ontario, Canada
| | - Lasti Erfinanda
- Institute of Physiology, Charité Universitätsmedizin Berlin, Berlin, Germany
| | - Geraldine Nouailles
- Department of Infectious Diseases and Pulmonary Medicine, Charité–Universitätsmedizin Berlin, Berlin, Germany
| | - Martin Witzenrath
- Department of Infectious Diseases and Pulmonary Medicine, Charité–Universitätsmedizin Berlin, Berlin, Germany
| | - Alexis Vogelzang
- Department of Immunology, Max Planck Institute for Infection Biology, Berlin, Germany
| | - Lu Lv
- Department of Cardiothoracic Surgery, Affiliated People’s Hospital of Jiangsu University, Zhenjiang, China
| | - Warren L. Lee
- Keenan Research Centre for Biomedical Science, St. Michael’s Hospital, Toronto, Ontario, Canada
| | - Haibo Zhang
- Keenan Research Centre for Biomedical Science, St. Michael’s Hospital, Toronto, Ontario, Canada
| | - Ori Rotstein
- Keenan Research Centre for Biomedical Science, St. Michael’s Hospital, Toronto, Ontario, Canada
- Department of Surgery, University of Toronto, Toronto, Ontario, Canada
| | - Andras Kapus
- Keenan Research Centre for Biomedical Science, St. Michael’s Hospital, Toronto, Ontario, Canada
- Department of Surgery, University of Toronto, Toronto, Ontario, Canada
| | - Katalin Szaszi
- Keenan Research Centre for Biomedical Science, St. Michael’s Hospital, Toronto, Ontario, Canada
- Department of Surgery, University of Toronto, Toronto, Ontario, Canada
| | - Ingrid Fleming
- Institute for Vascular Signaling, Center for Molecular Medicine, Goethe University Frankfurt, Frankfurt, Germany
| | - Wolfgang B. Liedtke
- Department of Medicine/Division of Neurology, Duke Clinics for Pain and Palliative Care, Duke University Medical Center, Durham, North Carolina; and
| | | | - Wolfgang M. Kuebler
- Keenan Research Centre for Biomedical Science, St. Michael’s Hospital, Toronto, Ontario, Canada
- Institute of Physiology, Charité Universitätsmedizin Berlin, Berlin, Germany
- Department of Surgery, University of Toronto, Toronto, Ontario, Canada
- German Heart Institute Berlin, Berlin, Germany
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Scheraga RG, Abraham S, Niese KA, Southern BD, Grove LM, Hite RD, McDonald C, Hamilton TA, Olman MA. TRPV4 Mechanosensitive Ion Channel Regulates Lipopolysaccharide-Stimulated Macrophage Phagocytosis. THE JOURNAL OF IMMUNOLOGY 2015; 196:428-36. [PMID: 26597012 DOI: 10.4049/jimmunol.1501688] [Citation(s) in RCA: 121] [Impact Index Per Article: 13.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/28/2015] [Accepted: 11/01/2015] [Indexed: 12/31/2022]
Abstract
Macrophage phagocytosis of particles and pathogens is an essential aspect of innate host defense. Phagocytic function requires cytoskeletal rearrangements that depend on the interaction between macrophage surface receptors, particulates/pathogens, and the extracellular matrix. In the present study we determine the role of a mechanosensitive ion channel, transient receptor potential vanilloid 4 (TRPV4), in integrating the LPS and matrix stiffness signals to control macrophage phenotypic change for host defense and resolution from lung injury. We demonstrate that active TRPV4 mediates LPS-stimulated murine macrophage phagocytosis of nonopsonized particles (Escherichia coli) in vitro and opsonized particles (IgG-coated latex beads) in vitro and in vivo in intact mice. Intriguingly, matrix stiffness in the range seen in inflamed or fibrotic lung is required to sensitize the TRPV4 channel to mediate the LPS-induced increment in macrophage phagocytosis. Furthermore, TRPV4 is required for the LPS induction of anti-inflammatory/proresolution cytokines. These findings suggest that signaling through TRPV4, triggered by changes in extracellular matrix stiffness, cooperates with LPS-induced signals to mediate macrophage phagocytic function and lung injury resolution. These mechanisms are likely to be important in regulating macrophage function in the context of pulmonary infection and fibrosis.
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Affiliation(s)
- Rachel G Scheraga
- Department of Pathobiology, Lerner Research Institute, Cleveland Clinic, Cleveland, OH 44195; Respiratory Institute, Cleveland Clinic, Cleveland, OH 44195; and
| | - Susamma Abraham
- Respiratory Institute, Cleveland Clinic, Cleveland, OH 44195; and
| | - Kathryn A Niese
- Department of Pathobiology, Lerner Research Institute, Cleveland Clinic, Cleveland, OH 44195
| | - Brian D Southern
- Department of Pathobiology, Lerner Research Institute, Cleveland Clinic, Cleveland, OH 44195; Respiratory Institute, Cleveland Clinic, Cleveland, OH 44195; and
| | - Lisa M Grove
- Department of Pathobiology, Lerner Research Institute, Cleveland Clinic, Cleveland, OH 44195
| | - R Duncan Hite
- Department of Pathobiology, Lerner Research Institute, Cleveland Clinic, Cleveland, OH 44195; Respiratory Institute, Cleveland Clinic, Cleveland, OH 44195; and
| | - Christine McDonald
- Department of Pathobiology, Lerner Research Institute, Cleveland Clinic, Cleveland, OH 44195
| | | | - Mitchell A Olman
- Department of Pathobiology, Lerner Research Institute, Cleveland Clinic, Cleveland, OH 44195; Respiratory Institute, Cleveland Clinic, Cleveland, OH 44195; and
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45
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Suresh K, Servinsky L, Reyes J, Baksh S, Undem C, Caterina M, Pearse DB, Shimoda LA. Hydrogen peroxide-induced calcium influx in lung microvascular endothelial cells involves TRPV4. Am J Physiol Lung Cell Mol Physiol 2015; 309:L1467-77. [PMID: 26453519 DOI: 10.1152/ajplung.00275.2015] [Citation(s) in RCA: 80] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2015] [Accepted: 10/07/2015] [Indexed: 12/22/2022] Open
Abstract
In acute respiratory distress syndrome, both reactive oxygen species (ROS) and increased intracellular calcium ([Ca(2+)]i) are thought to play important roles in promoting endothelial paracellular permeability, but the mechanisms linking ROS and [Ca(2+)]i in microvascular endothelial cells are not known. In this study, we assessed the effect of hydrogen peroxide (H2O2) on [Ca(2+)]i in mouse and human lung microvascular endothelial cells (MLMVEC and HLMVEC, respectively). We found that in both MLMVECs and HLMVECs, exogenously applied H2O2 increased [Ca(2+)]i through Ca(2+) influx and that pharmacologic inhibition of the calcium channel transient receptor potential vanilloid 4 (TRPV4) attenuated the H2O2-induced Ca(2+) influx. Additionally, knockdown of TRPV4 in HLMVEC also attenuated calcium influx following H2O2 challenge. Administration of H2O2 or TRPV4 agonists decreased transmembrane electrical resistance (TER), suggesting increased barrier permeability. To explore the regulatory mechanisms underlying TRPV4 activation by ROS, we examined H2O2-induced Ca(2+) influx in MLMVECs and HLMVECs with either genetic deletion, silencing, or pharmacologic inhibition of Fyn, a Src family kinase. In both MLMVECs derived from mice deficient for Fyn and HLMVECs treated with either siRNA targeted to Fyn or the Src family kinase inhibitor SU-6656 for 24 or 48 h, the H2O2-induced Ca(2+) influx was attenuated. Treatment with SU-6656 decreased the levels of phosphorylated, but not total, TRPV4 protein and had no effect on TRPV4 response to the external agonist, GSK1016790A. In conclusion, our data suggest that application of exogenous H2O2 increases [Ca(2+)]i and decreases TER in microvascular endothelial cells via activation of TRPV4 through a mechanism that requires the Src kinase Fyn.
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Affiliation(s)
- Karthik Suresh
- Division of Pulmonary and Critical Care Medicine, Department of Medicine and
| | - Laura Servinsky
- Division of Pulmonary and Critical Care Medicine, Department of Medicine and
| | - Jose Reyes
- Division of Pulmonary and Critical Care Medicine, Department of Medicine and
| | - Syeda Baksh
- Division of Pulmonary and Critical Care Medicine, Department of Medicine and
| | - Clark Undem
- Division of Pulmonary and Critical Care Medicine, Department of Medicine and
| | - Michael Caterina
- Department of Neurosurgery, Johns Hopkins School of Medicine, Baltimore, Maryland
| | - David B Pearse
- Division of Pulmonary and Critical Care Medicine, Department of Medicine and
| | - Larissa A Shimoda
- Division of Pulmonary and Critical Care Medicine, Department of Medicine and
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46
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Wandall-Frostholm C, Dalsgaard T, Bajoriūnas V, Oliván-Viguera A, Sadda V, Beck L, Mogensen S, Stankevicius E, Simonsen U, Köhler R. Genetic deficit of K Ca 3.1 channels protects against pulmonary circulatory collapse induced by TRPV4 channel activation. Br J Pharmacol 2015; 172:4493-4505. [PMID: 26102209 DOI: 10.1111/bph.13234] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2014] [Revised: 06/09/2015] [Accepted: 06/15/2015] [Indexed: 01/13/2023] Open
Abstract
BACKGROUND AND PURPOSE The intermediate conductance calcium/calmodulin-regulated K+ channel KCa 3.1 produces hyperpolarizing K+ currents that counteract depolarizing currents carried by transient receptor potential (TRP) channels, and provide the electrochemical driving force for Cl- and fluid movements. We investigated whether a deficiency in KCa 3.1 (KCa 3.1-/- ) protects against fatal pulmonary circulatory collapse in mice after pharmacological activation of the calcium-permeable TRP subfamily vanilloid type 4 (TRPV4) channels. EXPERIMENTAL APPROACH An opener of TRPV4 channels, GSK1016790A, was infused in wild-type (wt) and KCa 3.1-/- mice; haemodynamic parameters, histology and pulmonary vascular reactivity were measured; and patch clamp was performed on pulmonary arterial endothelial cells (PAEC). KEY RESULTS In wt mice, GSK1016790A decreased right ventricular and systemic pressure leading to a fatal circulatory collapse that was accompanied by increased protein permeability, lung haemorrhage and fluid extravasation. In contrast, KCa 3.1-/- mice exhibited a significantly smaller drop in pressure to GSK1016790A infusion, no haemorrhage and fluid water extravasation, and the mice survived. Moreover, the GSK1016790A-induced relaxation of pulmonary arteries of KCa 3.1-/- mice was significantly less than that of wt mice. GSK1016790A induced TRPV4 currents in PAEC from wt and KCa 3.1-/- mice, which co-activated KCa 3.1 and disrupted membrane resistance in wt PAEC, but not in KCa 3.1-/- PAEC. CONCLUSIONS AND IMPLICATIONS Our findings show that a genetic deficiency of KCa 3.1 channels prevented fatal pulmonary circulatory collapse and reduced lung damage caused by pharmacological activation of calcium-permeable TRPV4 channels. Therefore, inhibition of KCa 3.1channels may have therapeutic potential in conditions characterized by abnormal high endothelial calcium signalling, barrier disruption, lung oedema and pulmonary circulatory collapse.
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Affiliation(s)
| | - Thomas Dalsgaard
- Department of Biomedicine, Pulmonary and Cardiovascular Pharmacology, Aarhus University, Aarhus, Denmark
| | - Vytis Bajoriūnas
- Department of Biomedicine, Pulmonary and Cardiovascular Pharmacology, Aarhus University, Aarhus, Denmark.,Department of Physiology and Pharmacology, Faculty of Medicine, Kaunas, Lithuania
| | | | - Veeruanjaneyulu Sadda
- Department of Biomedicine, Pulmonary and Cardiovascular Pharmacology, Aarhus University, Aarhus, Denmark
| | - Lilliana Beck
- Department of Biomedicine, Pulmonary and Cardiovascular Pharmacology, Aarhus University, Aarhus, Denmark
| | - Susie Mogensen
- Department of Biomedicine, Pulmonary and Cardiovascular Pharmacology, Aarhus University, Aarhus, Denmark
| | - Edgaras Stankevicius
- Department of Physiology and Pharmacology, Faculty of Medicine, Kaunas, Lithuania
| | - Ulf Simonsen
- Department of Biomedicine, Pulmonary and Cardiovascular Pharmacology, Aarhus University, Aarhus, Denmark
| | - Ralf Köhler
- Aragon Institute of Health Sciences IIS and ARAID, Zaragoza, Spain
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Lu S, Xiang L, Clemmer JS, Mittwede PN, Hester RL. Oxidative stress increases pulmonary vascular permeability in diabetic rats through activation of transient receptor potential melastatin 2 channels. Microcirculation 2015; 21:754-60. [PMID: 25059284 DOI: 10.1111/micc.12158] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2014] [Accepted: 07/22/2014] [Indexed: 12/31/2022]
Abstract
OBJECTIVE In vitro superoxide activates pulmonary endothelial TRPM2 channels and increases Kf . We hypothesized that pulmonary capillary Kf is increased in a model of type I diabetes due to elevated vascular superoxide and resultant TRPM2 channel activation. METHODS Type I diabetes was induced in Zucker rats using STZ. Half of the STZ animals were treated with apocynin, a NOX inhibitor. After four weeks, lung Kf was measured in the isolated lung in the presence or absence of TRPM2 inhibitors (2-APB and FA). In an additional set of experiments, Kf was measured in nondiabetic Zucker rats after applying the superoxide donor (PMS). RESULTS As compared to control rats, hyperglycemic rats exhibited increased vascular superoxide and Kf , along with decreased lung vascular TRPM2-L expression. Apocynin treatment reduced superoxide and Kf in hyperglycemic rats with no effect in control rats. TRPM2 channel inhibition decreased Kf in hyperglycemic rats with no effect in control rats. PMS increased the lung Kf in control rats, with TRPM2 inhibition attenuating this response. CONCLUSION Diabetic rats exhibit a TRPM2-mediated increase in lung Kf , which is associated with increased TRPM2 activation and increased vascular superoxide levels.
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Affiliation(s)
- Silu Lu
- Department of Physiology, University of Mississippi Medical Center, Jackson, Mississippi, USA
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Lin MT, Jian MY, Taylor MS, Cioffi DL, Yap FC, Liedtke W, Townsley MI. Functional coupling of TRPV4, IK, and SK channels contributes to Ca(2+)-dependent endothelial injury in rodent lung. Pulm Circ 2015; 5:279-90. [PMID: 26064452 DOI: 10.1086/680166] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/02/2014] [Accepted: 09/15/2014] [Indexed: 02/05/2023] Open
Abstract
Our previous work has shown that the increased lung endothelial permeability response to 14,15-epoxyeicosatrienoic acid (14,15-EET) in rat lung requires Ca(2+) entry via vanilloid type-4 transient receptor potential (TRPV4) channels. Recent studies suggest that activation of TRPV4 channels in systemic vascular endothelium prolongs agonist-induced hyperpolarization and amplifies Ca(2+) entry by activating Ca(2+)-activated K(+) (KCa) channels, resulting in vessel relaxation. Activation of endothelial KCa channels thus has potential to increase the electrochemical driving force for Ca(2+) influx via TRPV4 channels and to amplify permeability responses to TRPV4 activation in lung. To examine this hypothesis, we used Western blot analysis, electrophysiological recordings, and isolated-lung permeability measurements to document expression of TRPV4 and KCa channels and the potential for functional coupling. The results show that rat pulmonary microvascular endothelial cells express TRPV4 and 3 KCa channels of different conductances: large (BK), intermediate (IK), and small (SK3). However, TRPV4 channel activity modulates the IK and SK3, but not the BK, channel current density. Furthermore, the TRPV4-mediated permeability response to 14,15-EET in mouse lung is significantly attenuated by pharmacologic blockade of IK and SK3, but not BK, channels. Collectively, this functional coupling suggests that endothelial TRPV4 channels in rodent lung likely form signaling microdomains with IK and SK3 channels and that the integrated response dictates the extent of lung endothelial injury caused by 14,15-EET.
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Affiliation(s)
- Mike T Lin
- Department of Physiology and Cell Biology, University of South Alabama, Mobile, Alabama, USA ; These authors contributed equally to this work
| | - Ming-Yuan Jian
- Department of Physiology and Cell Biology, University of South Alabama, Mobile, Alabama, USA ; Center for Lung Biology, University of South Alabama, Mobile, Alabama, USA ; Present address: Department of Anesthesiology, University of Alabama at Birmingham, Birmingham, Alabama, USA. ; These authors contributed equally to this work
| | - Mark S Taylor
- Department of Physiology and Cell Biology, University of South Alabama, Mobile, Alabama, USA
| | - Donna L Cioffi
- Center for Lung Biology, University of South Alabama, Mobile, Alabama, USA ; Department of Biochemistry and Molecular Biology, University of South Alabama, Mobile, Alabama, USA
| | - Fui C Yap
- Department of Physiology and Cell Biology, University of South Alabama, Mobile, Alabama, USA
| | - Wolfgang Liedtke
- Departments of Medicine, Neurology and Neurobiology, Duke University, Durham, North Carolina, USA
| | - Mary I Townsley
- Department of Physiology and Cell Biology, University of South Alabama, Mobile, Alabama, USA ; Center for Lung Biology, University of South Alabama, Mobile, Alabama, USA ; Department of Medicine, University of South Alabama, Mobile, Alabama, USA
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Monaghan K, McNaughten J, McGahon MK, Kelly C, Kyle D, Yong PH, McGeown JG, Curtis TM. Hyperglycemia and Diabetes Downregulate the Functional Expression of TRPV4 Channels in Retinal Microvascular Endothelium. PLoS One 2015; 10:e0128359. [PMID: 26047504 PMCID: PMC4457535 DOI: 10.1371/journal.pone.0128359] [Citation(s) in RCA: 54] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2015] [Accepted: 04/25/2015] [Indexed: 02/07/2023] Open
Abstract
Retinal endothelial cell dysfunction is believed to play a key role in the etiology and pathogenesis of diabetic retinopathy. Numerous studies have shown that TRPV4 channels are critically involved in maintaining normal endothelial cell function. In the current paper, we demonstrate that TRPV4 is functionally expressed in the endothelium of the retinal microcirculation and that both channel expression and activity is downregulated by hyperglycaemia. Quantitative PCR and immunostaining demonstrated molecular expression of TRPV4 in cultured bovine retinal microvascular endothelial cells (RMECs). Functional TRPV4 activity was assessed in cultured RMECs from endothelial Ca2+-responses recorded using fura-2 microfluorimetry and electrophysiological recordings of membrane currents. The TRPV4 agonist 4α-phorbol 12,13-didecanoate (4-αPDD) increased [Ca2+]i in RMECs and this response was largely abolished using siRNA targeted against TRPV4. These Ca2+-signals were completely inhibited by removal of extracellular Ca2+, confirming their dependence on influx of extracellular Ca2+. The 4-αPDD Ca2+-response recorded in the presence of cyclopiazonic acid (CPA), which depletes the intracellular stores preventing any signal amplification through store release, was used as a measure of Ca2+-influx across the cell membrane. This response was blocked by HC067047, a TRPV4 antagonist. Under voltage clamp conditions, the TRPV4 agonist GSK1016790A stimulated a membrane current, which was again inhibited by HC067047. Following incubation with 25 mM D-glucose TRPV4 expression was reduced in comparison with RMECs cultured under control conditions, as were 4αPDD-induced Ca2+-responses in the presence of CPA and ion currents evoked by GSK1016790A. Molecular expression of TRPV4 in the retinal vascular endothelium of 3 months' streptozotocin-induced diabetic rats was also reduced in comparison with that in age-matched controls. We conclude that hyperglycaemia and diabetes reduce the molecular and functional expression of TRPV4 channels in retinal microvascular endothelial cells. These changes may contribute to diabetes induced endothelial dysfunction and retinopathy.
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Affiliation(s)
- Kevin Monaghan
- Centre for Experimental Medicine, Queen’s University of Belfast
| | | | - Mary K. McGahon
- Centre for Experimental Medicine, Queen’s University of Belfast
| | - Catriona Kelly
- Centre for Experimental Medicine, Queen’s University of Belfast
| | - Daniel Kyle
- Centre for Experimental Medicine, Queen’s University of Belfast
| | - Phaik Har Yong
- Centre for Experimental Medicine, Queen’s University of Belfast
| | | | - Tim M. Curtis
- Centre for Experimental Medicine, Queen’s University of Belfast
- * E-mail:
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50
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Earley S, Brayden JE. Transient receptor potential channels in the vasculature. Physiol Rev 2015; 95:645-90. [PMID: 25834234 DOI: 10.1152/physrev.00026.2014] [Citation(s) in RCA: 294] [Impact Index Per Article: 32.7] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023] Open
Abstract
The mammalian genome encodes 28 distinct members of the transient receptor potential (TRP) superfamily of cation channels, which exhibit varying degrees of selectivity for different ionic species. Multiple TRP channels are present in all cells and are involved in diverse aspects of cellular function, including sensory perception and signal transduction. Notably, TRP channels are involved in regulating vascular function and pathophysiology, the focus of this review. TRP channels in vascular smooth muscle cells participate in regulating contractility and proliferation, whereas endothelial TRP channel activity is an important contributor to endothelium-dependent vasodilation, vascular wall permeability, and angiogenesis. TRP channels are also present in perivascular sensory neurons and astrocytic endfeet proximal to cerebral arterioles, where they participate in the regulation of vascular tone. Almost all of these functions are mediated by changes in global intracellular Ca(2+) levels or subcellular Ca(2+) signaling events. In addition to directly mediating Ca(2+) entry, TRP channels influence intracellular Ca(2+) dynamics through membrane depolarization associated with the influx of cations or through receptor- or store-operated mechanisms. Dysregulation of TRP channels is associated with vascular-related pathologies, including hypertension, neointimal injury, ischemia-reperfusion injury, pulmonary edema, and neurogenic inflammation. In this review, we briefly consider general aspects of TRP channel biology and provide an in-depth discussion of the functions of TRP channels in vascular smooth muscle cells, endothelial cells, and perivascular cells under normal and pathophysiological conditions.
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Affiliation(s)
- Scott Earley
- Department of Pharmacology, University of Nevada School of Medicine, Reno, Nevada; and Department of Pharmacology, University of Vermont College of Medicine, Burlington, Vermont
| | - Joseph E Brayden
- Department of Pharmacology, University of Nevada School of Medicine, Reno, Nevada; and Department of Pharmacology, University of Vermont College of Medicine, Burlington, Vermont
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