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Airway smooth muscle

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https://www.readbyqxmd.com/read/28637501/s100a8-inhibits-pdgf-induced-proliferation-of-airway-smooth-muscle-cells-dependent-on-the-receptor-for-advanced-glycation-end-products
#1
Yu-Dong Xu, Yu Wang, Lei-Miao Yin, Ling-Ling Peng, Gyoung-Hee Park, Yong-Qing Yang
BACKGROUND: Airway remodeling is a key feature of asthma, characterized by increased proliferation of airway smooth muscle cells (ASMCs). S100A8 is a calcium-binding protein with a potential to regulate cell proliferation. Here, the effect of exogenous S100A8 protein on the proliferation of ASMCs induced by platelet-derived growth factor (PDGF) and the underlying molecular mechanism was investigated. METHODS: Rat ASMCs were cultured with or without a neutralizing antibody to the receptor for advanced glycation end-products (RAGE), a potential receptor for S100A8 protein...
June 21, 2017: Biological Research
https://www.readbyqxmd.com/read/28635361/role-of-licochalcone-a-in-vegf-induced-proliferation-of-human-airway-smooth-muscle-cells-implications-for-asthma
#2
Sung-Ho Kim, Qing-Mei Pei, Ping Jiang, Min Yang, Xue-Jiao Qian, Jiang-Bo Liu
Asthma is a chronic respiratory disease characterized by reversible airway obstruction with persistent airway inflammation and airway remodeling, which is associated with increased airway smooth muscle (ASM) mass. Licochalcone A is the predominant characteristic chalcone in licorice root. We found that licochalcone A inhibited vascular endothelial growth factor (VEGF)-induced ASM cell proliferation and induced cell cycle arrest. Additionally, VEGF-induced ASM cell proliferation was suppressed via inhibition of extracellular signal-regulated kinase 1/2 (ERK1/2) activity, but not that of Akt...
February 2017: Growth Factors
https://www.readbyqxmd.com/read/28619712/targeting-acetylcholine-receptor-m3-prevents-the-progression-of-airway-hyperreactivity-in-a-mouse-model-of-childhood-asthma
#3
Kruti R Patel, Yan Bai, Kenneth G Trieu, Juliana Barrios, Xingbin Ai
Asthma often progresses into adulthood from early-life episodes of adverse environmental exposures. However, how the injury to developing lungs contributes to the pathophysiology of persistent asthma remains poorly understood. In this study, we identified an age-related mechanism along the cholinergic nerve-airway smooth muscle (ASM) axis that underlies prolonged airway hyperreactivity (AHR) in mice. We showed that ASM continued to mature until ∼3 wk after birth. Coinciding with postnatal ASM maturation, there was a critical time window for the development of ASM hypercontractility after cholinergic stimulation...
June 15, 2017: FASEB Journal: Official Publication of the Federation of American Societies for Experimental Biology
https://www.readbyqxmd.com/read/28615628/glucocorticoids-ameliorate-tgf-%C3%AE-1-mediated-epithelial-to-mesenchymal-transition-of-airway-epithelium-through-mapk-and-snail-slug-signaling-pathways
#4
Hyun-Woo Yang, Seoung-Ae Lee, Jae-Min Shin, Il-Ho Park, Heung-Man Lee
Chronic rhinosinusitis with nasal polyps (CRSwNP) is closely associated with tissue remodeling. Epithelial-to-mesenchymal transition (EMT), a process of tissue remodeling, can be a therapeutic target of CRSwNP. Glucocorticoids are a type of steroid hormone that is used primarily in medical therapy for patients with CRSwNP; however, their effects on EMT in the airway epithelium remain unknown. To investigate the effects of dexamethasone and fluticasone propionate, a class of glucocorticoids, on transforming growth factor-β1 (TGF-β1) -induced EMT, we used A549 cells, human primary nasal epithelial cells (hPNECs) and ex vivo organ culture of the inferior turbinate...
June 14, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28608951/tumstatin-regulates-the-angiogenic-and-inflammatory-potential-of-airway-smooth-muscle-extracellular-matrix
#5
Louise Margaret Harkness, Markus Weckmann, Matthias Kopp, Tim Becker, Anthony Wayne Ashton, Janette Kay Burgess
The extracellular matrix (ECM) creates the microenvironment of the tissue; an altered ECM in the asthmatic airway may be central in airway inflammation and remodelling. Tumstatin is a collagen IV-derived matrikine reduced in the asthmatic airway wall that reverses airway inflammation and remodelling in small and large animal models of asthma. This study hypothesized that the mechanisms underlying the broad asthma-resolving effects of tumstatin were due to autocrine remodelling of the ECM. Neutrophils and endothelial cells were seeded on decellularized ECM of non-asthmatic (NA) or asthmatic (A) airway smooth muscle (ASM) cells previously exposed to tumstatin in the presence or absence of a broad matrix metalloproteinase inhibitor, Marimastat...
June 13, 2017: Journal of Cellular and Molecular Medicine
https://www.readbyqxmd.com/read/28603838/compartmentalized-camp-responses-to-prostaglandin-ep2-receptor-activation-in-human-airway-smooth-muscle-cells
#6
Shailesh R Agarwal, Kathryn Miyashiro, Htun Latt, Rennolds S Ostrom, Robert D Harvey
BACKGROUND AND PURPOSE: Previous studies indicate that prostaglandin EP2 receptors (EP2 Rs) selectively couple to adenylyl cyclase type 2 (AC2) in non-lipid raft domains of airway smooth muscle (ASM) cells, where they regulate specific cAMP-dependent responses. The goal of the present study was to identify the cellular microdomains where EP2 Rs stimulate cAMP production. EXPERIMENTAL APPROACH: FRET-based cAMP biosensors were targeted to different subcellular locations of primary human ASM cells...
June 11, 2017: British Journal of Pharmacology
https://www.readbyqxmd.com/read/28603132/airways-and-vascular-smooth-muscles-relaxant-activities-of-gaultheria-trichophylla
#7
Fiaz Alam, Qazi Najumus Saqib, Abdul Jabbar Shah
The aim of this experimental work was to explore the potential pharmacological activities of Gaultheria trichophylla Royle in hyperactive respiratory and vascular conditions. Gaultheria trichophylla was extracted with solvents, phytochemical detection tests were performed, and rabbit trachea and aorta strips were used to evaluate its effects on airways and vascular smooth muscles. Qualitative phytochemical tests showed the presence of flavonoids, alkaloids, anthraquinones, saponins, terpenoids, and condensed tannins...
January 2017: Pakistan Journal of Pharmaceutical Sciences
https://www.readbyqxmd.com/read/28596292/the-pde4-inhibitor-chf-6001-and-lamas-inhibit-bronchoconstriction-induced-remodelling-in-lung-slices
#8
Loes Em Kistemaker, Tjitske A Oenema, Hoeke A Baarsma, I Sophie T Bos, Martina Schmidt, Fabrizio Facchinetti, Maurizio Civelli, Gino Villetti, Reinoud Gosens
Background Combination therapy of PDE4 inhibitors and anticholinergics induces bronchoprotection in COPD. Mechanical forces that arise during bronchoconstriction may contribute to airway remodelling. Therefore, we investigated the impact of PDE4 inhibitors and anticholinergics on bronchoconstriction-induced remodelling. Because of the different mechanism of action of PDE4 inhibitors and anticholinergics, we hypothesized functional interactions of these two drug classes. Methods Guinea pig precision cut lung slices were pre-incubated with the PDE4-inhibitors CHF-6001 or roflumilast and/or the anticholinergics tiotropium or glycopyorrolate, followed by stimulation with methacholine (10 μM) or TGF -β1 (2 ng/mL) for 48 hours...
June 8, 2017: American Journal of Physiology. Lung Cellular and Molecular Physiology
https://www.readbyqxmd.com/read/28574994/follistatin-like-1-fstl1-is-required-for-the-normal-formation-of-lung-airway-and-vascular-smooth-muscle-at-birth
#9
Xue Liu, Yingying Liu, Xiaohe Li, Jing Zhao, Yan Geng, Wen Ning
Fstl1, a secreted protein of the BMP antagonist class, has been implicated in the regulation of lung development and alveolar maturation. Here we generated a Fstl1-lacZ reporter mouse line as well as a Fstl1 knockout allele. We localized Fstl1 transcript in lung smooth muscle cells and identified Fstl1 as essential regulator of lung smooth muscle formation. Deletion of Fstl1 in mice led to postnatal death as a result of respiratory failure due to multiple defects in lung development. Analysis of the mutant phenotype showed impaired airway smooth muscle (SM) manifested as smaller SM line in trachea and discontinued SM surrounding bronchi, which were associated with decreased transcriptional factors myocardin/serum response factor (SRF) and impaired differentiation of SM cells...
2017: PloS One
https://www.readbyqxmd.com/read/28572736/asthma-like-airway-inflammation-and-responses-in-a-rat-model-of-atopic-dermatitis-induced-by-neonatal-capsaicin-treatment
#10
Rafael Taeho Han, Sewon Kim, Kyungmin Choi, Hyeonseok Jwa, JaeHee Lee, Hye Young Kim, Hee Jin Kim, Hang-Rae Kim, Seung Keun Back, Heung Sik Na
Recent studies have shown that approximately 70% of patients with severe atopic dermatitis (AD) develop asthma. Development of AD in infancy and subsequent other atopic diseases such as asthma in childhood is referred to as atopic march. However, a causal link between the diseases of atopic march has remained largely unaddressed, possibly due to lack of a proper animal model. Recently, we developed an AD rat model showing chronically relapsing dermatitis and scratching behaviors induced by neonatal capsaicin treatment...
2017: Journal of Asthma and Allergy
https://www.readbyqxmd.com/read/28560433/overexpression-of-glp-1-receptors-suppresses-proliferation-and-cytokine-release-by-airway-smooth-muscle-cells-of-patients-with-chronic-obstructive-pulmonary-disease-via-activation-of-abca1
#11
Yan-Hong Sun, Lan He, Ming-Yu Yan, Rui-Qian Zhao, Bin Li, Feng Wang, Ying Yang, Hua-Peng Yu
Glucagon-like peptide-1 (GLP‑1) is an important insulin secretagogue that possesses anti‑inflammatory effects. GLP‑1 receptor (GLP‑1R) agonists have been demonstrated to serve a pivotal role in the treatment of obstructive lung diseases, including chronic obstructive pulmonary disease (COPD). However, the specific function and underlying mechanisms of GLP‑1R in COPD remain uncertain. The aim of the present study was to investigate the action and underlying mechanisms of GLP‑1R in airway smooth muscle (ASM) cells from COPD patients...
July 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/28555112/caveolin-1-functional-insights-into-its-role-in-muscarine-and-serotonin-induced-smooth-muscle-constriction-in-murine-airways
#12
Maryam Keshavarz, Heike Schwarz, Petra Hartmann, Silke Wiegand, Melanie Skill, Mike Althaus, Wolfgang Kummer, Gabriela Krasteva-Christ
An increased bronchoconstrictor response is a hallmark in the progression of obstructive airway diseases. Acetylcholine and 5-hydroxytryptamine (5-HT, serotonin) are the major bronchoconstrictors. There is evidence that both cholinergic and serotonergic signaling in airway smooth muscle (ASM) involve caveolae. We hypothesized that caveolin-1 (cav-1), a structural protein of caveolae, plays an important regulatory role in ASM contraction. We analyzed airway contraction in different tracheal segments and extra- and intrapulmonary bronchi in cav-1 deficient (cav-1-/-) and wild-type mice using organ bath recordings and videomorphometry of methyl-beta-cyclodextrin (MCD) treated and non-treated precision-cut lung slices (PCLS)...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28534960/cellular-na-handling-mechanisms-involved-in-airway-smooth-muscle-contraction-review
#13
Bettina Sommer, Edgar Flores-Soto, Georgina Gonzalez-Avila
A decrease in bronchial diameter is designated as bronchoconstriction (BC) and impedes the flow of air through the airway. Asthma is characterized by inflammation of the airways, reversible BC and nonspecific hyperreactivity. These last two symptoms are dependent on airway smooth muscle. Stimuli that trigger contraction can be characterized as chemical (neurotransmitters, cytokines and terpenoids) and physical (volume inspired, air pressure). Both stimuli activate signaling pathways by acting on membrane proteins and facilitating the passage of ions through the membrane, generating a voltage change and a subsequent depolarization...
May 17, 2017: International Journal of Molecular Medicine
https://www.readbyqxmd.com/read/28523001/the-role-of-transient-receptor-potential-vanilloid-4-in-pulmonary-inflammatory-diseases
#14
REVIEW
Rachel G Scheraga, Brian D Southern, Lisa M Grove, Mitchell A Olman
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...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/28522569/brain-derived-neurotrophic-factor-and-airway-fibrosis-in-asthma
#15
Michelle R Freeman, Venkatachalem Sathish, Logan J Manlove, Shengyu Wang, Rodney D Britt, Michael A Thompson, Christina M Pabelick, Y S Prakash
Airway remodeling in asthma driven by inflammation involves proliferation of epithelial cells and airway smooth muscle (ASM), as well as enhanced extracellular matrix (ECM) generation and deposition, i.e. fibrosis. Accordingly, understanding pro-fibrotic mechanisms is important for developing novel therapeutic strategies in asthma. Recent studies, including our own, have suggested a role for locally-produced growth factors such as brain-derived neurotrophic factor (BDNF) in mediating and modulating inflammation effects...
May 18, 2017: American Journal of Physiology. Lung Cellular and Molecular Physiology
https://www.readbyqxmd.com/read/28521243/shikonin-alleviates-allergic-airway-remodeling-by-inhibiting-the-erk-nf-%C3%AE%C2%BAb-signaling-pathway
#16
Tian-Yue Wang, Qian-Lan Zhou, Miao Li, Yun-Xiao Shang
Shikonin is a naphthoquinone extracted from the root of Lithospermum erythrorhizon, and has been reported to suppress allergic airway inflammation in mice. However, the underlying mechanisms are unclear and need to be further elucidated. In this study, shikonin (0.5, 2 or 4mg/kg) was given intraperitoneally to ovalbumin (OVA)-challenged BALB/c mice. We found that the pathological airway remodeling of asthmatic mice was alleviated by shikonin, and the infiltrated inflammatory cells and collagen deposition in their lungs were reduced...
May 15, 2017: International Immunopharmacology
https://www.readbyqxmd.com/read/28511697/immunohistology-and-remodeling-in-fatal-pediatric-and-adolescent-asthma
#17
Kristiina Malmström, Jouko Lohi, Antti Sajantila, Frode L Jahnsen, Merja Kajosaari, Seppo Sarna, Mika J Mäkelä
BACKGROUND: Thickening of reticular basement membrane, increased airway smooth muscle mass and eosinophilic inflammation are found in adult fatal asthma. At the present study the histopathology of fatal paediatric and adolescent asthma is evaluated. METHODS: Post-mortem lung autopsies from 12 fatal asthma cases and 8 non-asthmatic control subjects were examined. Thickness of reticular basement membrane (RBM) and percentage of airway smooth muscle (ASM%) mass area were measured and inflammatory cells were counted...
May 16, 2017: Respiratory Research
https://www.readbyqxmd.com/read/28507585/ctgf-upregulation-correlates-with-mmp-9-level-in-airway-remodeling-in-a%C3%A2-murine-model-of-asthma
#18
Sheng-Chieh Lin, Hsiu-Chu Chou, Bor-Luen Chiang, Chung-Ming Chen
INTRODUCTION: Connective tissue growth factor (CTGF) mediates hypertrophy, proliferation, and extracellular matrix synthesis. Matrix metalloproteinase (MMP) plays a role in airway extracellular matrix remodeling. The correlation between CTGF and MMP in airway remodeling of asthma was unknown. This study investigated lung CTGF expression and its correlation with MMP and airway structural changes in a murine model of asthma. MATERIAL AND METHODS: Female BALB/c mice were sensitized and challenged by intraperitoneal injections and intranasal phosphate-buffered saline (PBS) or ovalbumin (OVA)...
April 1, 2017: Archives of Medical Science: AMS
https://www.readbyqxmd.com/read/28506092/variants-of-the-adrb2-gene-in-copd-systematic-review-and-meta-analyses-of-disease-risk-and-treatment-response
#19
Anne Orholm Nielsen, Camilla Steen Jensen, Mohamed Simo Arredouani, Ronald Dahl, Morten Dahl
The β2-adrenergic receptor (ADRB2) is an important regulator of airway smooth muscle tone in chronic obstructive pulmonary disease (COPD). Variants that impair ADRB2 function could increase disease risk or reduce the response to endogenous and inhaled adrenergic agonists in COPD. We performed a systematic review and three meta-analyses to assess whether three functional variants (Thr164Ile, Arg16Gly, and Gln27Glu) in the ADRB2 gene are associated with elevated risk of disease or reduced therapeutic response to inhaled β2-agonists in COPD...
May 16, 2017: COPD
https://www.readbyqxmd.com/read/28499927/disruption-of-the-hepcidin-ferroportin-regulatory-system-causes-pulmonary-iron-overload-and-restrictive-lung-disease
#20
Joana Neves, Dominik Leitz, Simone Kraut, Christina Brandenberger, Raman Agrawal, Norbert Weissmann, Christian Mühlfeld, Marcus A Mall, Sandro Altamura, Martina U Muckenthaler
Emerging evidence suggests that pulmonary iron accumulation is implicated in a spectrum of chronic lung diseases. However, the mechanism(s) involved in pulmonary iron deposition and its role in the in vivo pathogenesis of lung diseases remains unknown. Here we show that a point mutation in the murine ferroportin gene, which causes hereditary hemochromatosis type 4 (Slc40a1(C326S)), increases iron levels in alveolar macrophages, epithelial cells lining the conducting airways and lung parenchyma, and in vascular smooth muscle cells...
June 2017: EBioMedicine
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