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Luo J, Liu YH, Luo W, Luo Z, Liu CT. β 2-adrenoreceptor Inverse Agonist Down-regulates Muscarine Cholinergic Subtype-3 Receptor and Its Downstream Signal Pathways in Airway Smooth Muscle Cells in vitro. Sci Rep 2017; 7:39905. [PMID: 28051147 PMCID: PMC5209700 DOI: 10.1038/srep39905] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2016] [Accepted: 11/29/2016] [Indexed: 02/05/2023] Open
Abstract
Mechanisms underlying β2-adrenoreceptor (β2AR) inverse agonist mediated bronchoprotectiveness remain unknown. We incubated ICI118,551, formoterol, budesonide, and formoterol plus budesonide, as well as ICI118,551 or pindolol plus formoterol, ICI118,551 plus forskolin, SQ22,536 or H89 plus formoterol in ASMCs to detect expressions of M3R, PLCβ1 and IP3. The level of M3R in the presence of 10−5 mmol/L ICI118,551 were significantly decreased at 12 h, 24 h and 48 h (P < 0.05), and at 24 h were significantly reduced in ICI118,551 with concentration of 10−5 mmol/L, 10−6 mmol/L, 10−7 mmol/L, and 10−8 mmol/L (P < 0.05). The level of IP3 in 10−5 mmol/L ICI118,551 was significantly diminished at 24 h (P < 0.01), except for that at 1 h, neither was in the level of PLCβ1. A concentration of 10−5 mmol/L ICI118,551 at 24 h showed a significant reduction of M3R level compared to formoterol (P < 0.01), budesonide (P < 0.01), and formoterol + budesonide (P < 0.05), but significant reduction of PLCβ1 and IP3 was only found between 10−5 mmol/L ICI118,551 and formoterol at 24 h, but not in the comparison of budesonide or formoterol + budesonide. Pindolol and H89 could not inhibit the formoterol-induced expression of M3R (P > 0.05), but SQ22,536 significantly antagonized the formoterol-induced M3R expression (P < 0.05). In conclusions, β2AR inverse agonist, ICI118,551, exerts similar bronchoprotective effects to corticosteroids via decreasing the expression of M3R and inhibiting the production of IP3.
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Affiliation(s)
- Jian Luo
- Department of Respiratory Diseases, West China School of Medicine and West China Hospital, Sichuan University, Chengdu, 610041, China
| | - Yuan-Hua Liu
- Department of Respiratory Diseases, The First Affiliated Hospital, Zhengzhou University, Zhengzhou, 450052, China
| | - Wei Luo
- Department of Respiratory Diseases, The First Affiliated Hospital, Chongqing Medical University, Chongqing, 400016, China
| | - Zhu Luo
- Department of Respiratory Diseases, West China School of Medicine and West China Hospital, Sichuan University, Chengdu, 610041, China
| | - Chun-Tao Liu
- Department of Respiratory Diseases, West China School of Medicine and West China Hospital, Sichuan University, Chengdu, 610041, China
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Habukawa C, Murakami K, Sugitani K, Ohtani T, Saputra GP, Kashiyama K, Nagasaka Y, Wada S. Changes in lung sounds during asthma progression in a guinea pig model. Allergol Int 2016; 65:425-431. [PMID: 27499508 DOI: 10.1016/j.alit.2016.03.010] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2016] [Revised: 03/17/2016] [Accepted: 03/22/2016] [Indexed: 12/16/2022] Open
Abstract
BACKGROUND Lung sound analysis is useful for objectively evaluating airways even in children with asymptomatic asthma. However, the relationship between lung sounds and morphological changes in the airways has not been elucidated. We examined the relationship between lung sounds and chronic morphological changes in the airways during the progression of asthma from onset in guinea pigs. METHODS Eleven male guinea pigs were examined; of these, seven were used as asthma models and four as controls. The asthma models were sensitized and repeatedly challenged by inhaling albumin chicken egg. We measured lung sounds and lung function twice a week for 21 weeks. After the final antigen challenge, the lungs were excised for histological examination. We measured the ratio of airway wall thickness to the total airway area and the ratio of the internal area to the total airway area in the trachea, third bronchi, and terminal bronchioles. RESULTS Among the lungs sounds, the difference between the two groups was greatest with respect to inspiratory sound intensity. The ratio of airway wall thickness to the total airway area of the terminal bronchioles was greater in the asthma models than in the controls, and it correlated best with the changes in inspiratory sound intensity in the 501-1000-Hz range (r = 0.76, p < 0.003). CONCLUSIONS Lung sound intensity in the middle frequency range from 501 to 1000 Hz correlated with peripheral airway wall thickness. Inspiratory sound intensity appeared to be an indicator of morphological changes in small airways in asthma.
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Amrani Y. Airway smooth muscle modulation and airway hyper-responsiveness in asthma: new cellular and molecular paradigms. Expert Rev Clin Immunol 2010; 2:353-64. [PMID: 20476907 DOI: 10.1586/1744666x.2.3.353] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
There is growing evidence indicating the existence of a causal relationship between abnormal airway smooth muscle (ASM) function and airway hyper-responsiveness, a poorly understood feature of asthma that can be defined as an excessive bronchospastic response. In recent years, there has been a veritable explosion of articles suggesting that ASM exposed to proasthmatic cytokines can elicit a hyper-responsive state to contractile G-protein-coupled receptor (GPCR) agonists. Aberrant airway responsiveness could result from abnormal calcium signaling, with changes occurring at various levels of GPCR-associated signal transduction. This review presents the latest observations describing novel mechanistic models that could explain the involvement of ASM in airway hyper-responsiveness. This review will discuss the role of ASM in beta(2)-agonist-mediated bronchial hyper-responsiveness and the clinical significance of cell-cell contact between ASM and mast cells recently described to be intimately infiltrated within the ASM tissues in asthmatic patients. The possibility that allergens could trigger airway hyper-responsiveness by directly acting on ASM via activation of immunoglobulin E receptors, FcepsilonRI and FCepsilonRII will also be discussed. These important findings further support the notion that targeting ASM could offer new treatment for many features of asthma, including airway hyper-responsiveness. Future therapeutic intervention includes: the prevention of ASM-inflammatory cell physical and/or functional interaction, the inhibition of Immunoglobulin E receptor-dependent signal transduction, and the abrogation of cytokine-dependent pathways that modulate receptor-associated calcium metabolism.
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Affiliation(s)
- Yassine Amrani
- University of Pennsylvania Medical Center, Pulmonary, Allergy and Critical Care Division, Department of Medicine, BRB II/III, 421 Curie Boulevard, Philadelphia, PA 19104, USA.
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Cometa MF, Parisi L, Palmery M, Meneguz A, Tomassini L. In vitro relaxant and spasmolytic effects of constituents from Viburnum prunifolium and HPLC quantification of the bioactive isolated iridoids. JOURNAL OF ETHNOPHARMACOLOGY 2009; 123:201-207. [PMID: 19429363 DOI: 10.1016/j.jep.2009.03.021] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/21/2008] [Revised: 02/28/2009] [Accepted: 03/15/2009] [Indexed: 05/27/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Viburnum prunifolium is a North America shrub used in ethnomedicine because of its spasmolytic, sedative, and anti-asthmatic properties. AIM OF THE STUDY Contrasting results were reported in past literature about the active principles of this plant. Our aim was to clarify this matter by evaluating the relaxant and spasmolytic activities of the main constituents obtained from the drug. MATERIALS AND METHODS The pharmacological assays were carried out on rabbit jejunum spontaneous contractions and on guinea-pig carbachol-precontracted trachea. RESULTS Cumulative concentration (1-100 microg/ml) of Viburnum prunifolium methanolic extract (MeOH extract), its purified fractions soluble in ethylacetate (EtOAc fraction) and in n-butanol (BuOH fraction), and the iridoid glucosides (2 x 10(-5) to 4 x 10(-4)M): 2'-O-acetyldihydropenstemide (1), 2'-O-trans-p-coumaroyldihydropenstemide (2), 2'-O-acetylpatrinoside (3), and patrinoside (4), isolated from EtOAc fraction (1 and 2) and BuOH fraction (3 and 4), induced both relaxant effect of rabbit jejunum spontaneous contractions and spasmolytic effect on guinea-pig carbachol (5.5 x 10(-7)M)-precontracted trachea. Propranolol (10(-6)M) antagonised all Viburnum prunifolium tested components relaxant and spasmolytic effects. At non-relaxing concentrations (0.5 microg/ml), MeOH extract and its fractions induced a potentiating effect of isoprenaline cumulative concentrations also in both isolated tissues. CONCLUSION In both tissues, the order of potency was EtOAc fraction>BuOH fraction>MeOH extract and 1>2>3>4 suggesting that the major iridoids of EtOAc fraction may be considered among the most active compounds. HPLC analysis of the bioactive iridoids indicates that 1 and 2 are present for 7.38% and 14.90% in EtOAc fraction, and 3 and 4 for 18.47% and 8.86% in BuOH fraction. By comparing the values of EC(50) of the fractions and compounds isolated from them, we may assume that the iridoids play a significant role in the biological activity of the corresponding fractions.
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Affiliation(s)
- Maria Francesca Cometa
- Department of Therapeutic Research and Medicines Evaluation, Istituto Superiore di Sanità, V.le Regina Elena 299, 00161 Rome, Italy.
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Helisch A, Schirrmacher E, Thews O, Schirrmacher R, Buchholz HG, Dillenburg W, Höhnemann S, Tillmanns J, Wessler I, Buhl R, Rösch F, Bartenstein P. Demonstration of pulmonary β2-adrenergic receptor binding in vivo with [18F]fluoroethyl-fenoterol in a guinea pig model. Eur J Nucl Med Mol Imaging 2005; 32:1324-8. [PMID: 16133376 DOI: 10.1007/s00259-005-1914-9] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2005] [Accepted: 07/14/2005] [Indexed: 11/25/2022]
Abstract
PURPOSE The new beta2 radioligand (R,R)(S,S) 5-(2-(2-[4-(2-[18F]fluoroethoxy)phenyl]-1-methylethylamino)-1-hydroxyethyl)-benzene-1,3-diol ([18F]FE-fenoterol; [18F]FEFE), a fluoroethylated derivative of racemic fenoterol, was evaluated in vivo and ex vivo using a guinea pig model. METHODS Dynamic PET studies over 60 min with [(18)F]FEFE were performed in nine Hartley guinea pigs in which a baseline (group 1, n=3), a predose (group 2, n=3; 2 mg/kg fenoterol 5 min prior to injection of [18F]FEFE) or a displacement study (group 3, n=3; 2 mg/kg fenoterol 5 min post injection of [18F]FEFE) was conducted. RESULTS In all animal groups, the lungs could be visualised and semi-quantified separately by calculating uptake ratios to non-specific binding in the neck area. Premedication with non-radioactive fenoterol and displacement tests showed significant reduction of lung uptake, by 94% and 76%, respectively. CONCLUSION These data demonstrate specific binding of the new radioligand to the pulmonary beta2-receptors in accordance with ex vivo measurements. Therefore, [18F]FEFE seems to be suitable for the in vivo visualisation and quantification of the pulmonary beta2-receptor binding in this animal model.
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Affiliation(s)
- A Helisch
- Department of Nuclear Medicine, University Hospital, Langenbeckstrasse 1, 55101 Mainz, Germany.
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Faisy C, Naline E, Diehl JL, Emonds-Alt X, Chinet T, Advenier C. In vitro sensitization of human bronchus by beta2-adrenergic agonists. Am J Physiol Lung Cell Mol Physiol 2002; 283:L1033-42. [PMID: 12376356 DOI: 10.1152/ajplung.00063.2002] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Incubation of human distal bronchi from 48 patients for 15 h with 10(-7) M fenoterol induced sensitization characterized by an increase in maximal contraction to endothelin-1 (ET-1) and acetylcholine (ACh). Incubation of human bronchi with 10(-6), 3 x 10(-6), and 10(-5) M forskolin (an adenyl cyclase activator) reproduced sensitization to ET-1 and ACh. The sensitizing effect of fenoterol was inhibited by coincubation with gliotoxine (a nuclear factor-kappaB inhibitor), dexamethasone, indomethacin (a cyclooxygenase inhibitor), GR-32191 (a TP prostanoid receptor antagonist), MK-476 (a cysteinyl leukotriene type 1 receptor antagonist), SR-140333 + SR-48968 + SR-142801 (neurokinin types 1, 2, and 3 tachykinin receptor antagonists) with or without HOE-140 (a bradykinin B(2) receptor antagonist), SB-203580 (an inhibitor of the 38-kDa mitogen-activated protein kinase, p38(MAPK)), or calphostin C (a protein kinase C blocker). Our results suggest that chronic exposure to fenoterol induces proinflammatory effects mediated by nuclear factor-kappaB and pathways involving leukotrienes, prostanoids, bradykinin, tachykinins, protein kinase C, and p38(MAPK), leading to the regulation of smooth muscle contraction to ET-1 and ACh.
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Affiliation(s)
- Christophe Faisy
- Unité Propre de Recherche de l'Enseignement Supérior Equipe d'Accueil 220, Faculté de Médecine Paris-Ouest, 75006 Paris, France
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Amrani Y, Panettieri RA. Modulation of calcium homeostasis as a mechanism for altering smooth muscle responsiveness in asthma. Curr Opin Allergy Clin Immunol 2002; 2:39-45. [PMID: 11964749 DOI: 10.1097/00130832-200202000-00007] [Citation(s) in RCA: 77] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
Airway hyperresponsiveness remains a defining characteristic of asthma. Traditional views assert that airway smooth muscle is an important structural effector cell in the bronchi that modulates bronchomotor tone induced by contractile agonists. New evidence, however, suggests that abnormalities in airway smooth muscle functions, induced by variety of extracellular stimuli, may play an important role in the development of airway hyperresponsiveness. Studies using isolated bronchial preparations or cultured cells show that inflammatory mediators and cytokines may alter calcium homeostasis in airway smooth muscle and render the cells nonspecifically hyperreactive to agonists.
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Affiliation(s)
- Yassine Amrani
- Pulmonary and Critical Care Division, Department of Medicine, University of Pennsylvania Medical Center, 848 BRB II/III, 421 Curie Boulevard, Philadelphia, PA 19104, USA.
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Abstract
Excitatory non-adrenergic-non-cholinergic neuropeptides, such as the tachykinins substance P and neurokinin A, and its receptors are present in human and animal airways. Tachykinins are biologically active at extremely low concentrations. These peptides can cause potent inflammatory effects and can affect airway function in a way that resembles features of asthma. Local release of tachykinins affects blood vessels (vasodilatation and increased vascular permeability) and bronchial smooth muscle (bronchoconstrition and hyperresponsiveness). Neuropeptide research has revealed that tachykinins also play an important modulatory role in immune reactions. Tachykinins stimulate immune cells, such as mast cells, lymphocytes, and macrophages and are chemotactic for neutrophils and eosinophils. Vice versa, a range of immune cell mediators can also induce the release of tachykinins from excitatory NANC nerve endings in the airways. In the last 20 years, significant advances have been made in investigations of the interaction between immune cells and nervous systems in chronic inflammatory diseases such as asthma.
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Affiliation(s)
- A D Kraneveld
- Department of Pharmacology and Pathophysiology, Utrecht Institute for Pharmaceutical Sciences, Utrecht University, The Netherlands.
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