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Respiratory Research

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https://www.readbyqxmd.com/read/29162108/reduced-suppressive-effect-of-%C3%AE-2-adrenoceptor-agonist-on-fibrocyte-function-in-severe-asthma
#1
Chun-Yu Lo, Charalambos Michaeloudes, Pankaj K Bhavsar, Chien-Da Huang, Po-Jui Chang, Chun-Hua Wang, Han-Pin Kuo, Kian Fan Chung
BACKGROUND: Patients with severe asthma have increased airway remodelling and elevated numbers of circulating fibrocytes with enhanced myofibroblastic differentiation capacity, despite being treated with high doses of corticosteroids, and long acting β2-adrenergic receptor (AR) agonists (LABAs). We determined the effect of β2-AR agonists, alone or in combination with corticosteroids, on fibrocyte function. METHODS: Non-adherent non-T cells from peripheral blood mononuclear cells isolated from healthy subjects and patients with non-severe or severe asthma were treated with the β2-AR agonist, salmeterol, in the presence or absence of the corticosteroid dexamethasone...
November 21, 2017: Respiratory Research
https://www.readbyqxmd.com/read/29149889/electronic-cigarette-vapor-alters-the-lateral-structure-but-not-tensiometric-properties-of-calf-lung-surfactant
#2
Rebecca J Przybyla, Jason Wright, Rajan Parthiban, Saeed Nazemidashtarjandi, Savas Kaya, Amir M Farnoud
BACKGROUND: Despite their growing popularity, the potential respiratory toxicity of electronic cigarettes (e-cigarettes) remains largely unknown. One potential aspect of e-cigarette toxicity is the effect of e-cigarette vapor on lung surfactant function. Lung surfactant is a mixture of lipids and proteins that lines the alveolar region. The surfactant layer reduces the surface tension of the alveolar fluid, thereby playing a crucial role in lung stability. Due to their small size, particulates in e-cigarette vapor can penetrate the deep lungs and come into contact with the lung surfactant...
November 17, 2017: Respiratory Research
https://www.readbyqxmd.com/read/29137646/the-potential-of-interleukin-37-as-an-effective-therapeutic-agent-in-asthma
#3
REVIEW
Lina Zhang, Jie Zhang, Peng Gao
Interleukin (IL)-37 belongs to the IL-1 cytokine family. It binds to IL-18Rα and recruits the orphan decoy IL-1R8. Emerging evidence shows that IL-37 is a key player in the regulation of inflammation, cellular differentiation, and proliferation. Altered IL-37 expression has been demonstrated in many inflammatory disease conditions, including asthma. In rheumatoid arthritis, IL-37 is involved in the regulation of proliferation, production of inflammatory mediators, and activation of inflammatory cells. Furthermore, this cytokine acts as a negative regulator of inflammation in inflammatory bowel disease...
November 14, 2017: Respiratory Research
https://www.readbyqxmd.com/read/29137638/virus-triggered-exacerbation-in-allergic-asthmatic-children-neutrophilic-airway-inflammation-and-alteration-of-virus-sensors-characterize-a-subgroup-of-patients
#4
Antoine Deschildre, Muriel Pichavant, Ilka Engelmann, Carole Langlois, Elodie Drumez, Guillaume Pouessel, Sophie Boileau, David Romero-Cubero, Irina Decleyre-Badiu, Anny Dewilde, Didier Hober, Véronique Néve, Caroline Thumerelle, Stéphanie Lejeune, Clémence Mordacq, Philippe Gosset
BACKGROUND: Viruses are important triggers of asthma exacerbations. They are also detected outside of exacerbation. Alteration of anti-viral response in asthmatic patients has been shown although the mechanisms responsible for this defect remain unclear. The objective of this study was to compare in virus-infected and not-infected allergic asthmatic children, aged 6 to 16 years, admitted to hospital for a severe exacerbation, the innate immune response and especially the expression of pattern recognition receptor (PRR) and their function...
November 14, 2017: Respiratory Research
https://www.readbyqxmd.com/read/29132424/novel-insights-in-cough-and-breathing-patterns-of-patients-with-idiopathic-pulmonary-fibrosis-performing-repeated-24-hour-respiratory-polygraphies
#5
LETTER
Anke Schertel, Manuela Funke-Chambour, Thomas Geiser, Anne-Kathrin Brill
BACKGROUND: The main symptoms of patients with idiopathic pulmonary fibrosis (IPF) are cough and dyspnea. IPF leads to a restrictive lung disorder impacting daytime and nocturnal breathing patterns. In this pilot study we assessed the course of day- and nighttime respiration, oxygenation, and cough over a period of 8 months as well as differences between wakefulness and sleep in IPF patients. METHODS: Repetitive 24-h respiratory polygraphies (RP) and pulmonary function tests were performed at baseline and after 3, 4, 7 and 8 months...
November 13, 2017: Respiratory Research
https://www.readbyqxmd.com/read/29132356/vitamin-k-deficiency-the-linking-pin-between-copd-and-cardiovascular-diseases
#6
LETTER
Ianthe Piscaer, Emiel F M Wouters, Cees Vermeer, Wim Janssens, Frits M E Franssen, Rob Janssen
Cardiovascular diseases are prevalent in patients with chronic obstructive pulmonary disease (COPD). Their coexistence implies that many COPD patients require anticoagulation therapy. Although more and more replaced by direct oral anticoagulants, vitamin K antagonists (VKAs) are still widely used. VKAs induce profound deficiency of vitamin K, a key activator in the coagulation pathway. It is recognized however that vitamin K is also an essential cofactor in the activation of other extrahepatic proteins, such as matrix Gla protein (MGP), a potent inhibitor of arterial calcification...
November 13, 2017: Respiratory Research
https://www.readbyqxmd.com/read/29126429/rna-sequencing-analysis-of-lung-primary-fibroblast-response-to-eosinophil-degranulation-products-predicts-downstream-effects-on-inflammation-tissue-remodeling-and-lipid-metabolism
#7
Stephane Esnault, Ksenija Bernau, Elizabeth E Torr, Yury A Bochkov, Nizar N Jarjour, Nathan Sandbo
BACKGROUND: The association of eosinophils with inflammation and tissue remodeling is at least partially due to their release of toxic granule proteins and other mediators, including cytokines. Tissue remodeling and consequent functional defects are affected by activity of connective tissue fibroblasts. Exaggerated fibroblast activation, accumulation and change of phenotype may lead to fibrosis and loss of tissue function. So far, little information has been reported on how eosinophils affect inflammation and tissue remodeling via the activation of fibroblasts...
November 10, 2017: Respiratory Research
https://www.readbyqxmd.com/read/29115963/changes-in-vasoactive-pathways-in-congenital-diaphragmatic-hernia-associated-pulmonary-hypertension-explain-unresponsiveness-to-pharmacotherapy
#8
Daphne S Mous, Marjon J Buscop-van Kempen, Rene M H Wijnen, Dick Tibboel, Robbert J Rottier
BACKGROUND: Patients with congenital diaphragmatic hernia (CDH) have structural and functional different pulmonary vessels, leading to pulmonary hypertension. They often fail to respond to standard vasodilator therapy targeting the major vasoactive pathways, causing a high morbidity and mortality. We analyzed whether the expression of crucial members of these vasoactive pathways could explain the lack of responsiveness to therapy in CDH patients. METHODS: The expression of direct targets of current vasodilator therapy in the endothelin and prostacyclin pathway was analyzed in human lung specimens of control and CDH patients...
November 7, 2017: Respiratory Research
https://www.readbyqxmd.com/read/29110704/endobronchial-one-way-valves-for-treatment-of-persistent-air-leaks-a-systematic-review
#9
REVIEW
Mei Ding, Ya-Dong Gao, Xian-Tao Zeng, Yi Guo, Jiong Yang
Persistent air leak (PAL) is associated with significant morbidity and mortality, prolonged hospitalization and increased health-care costs. It can arise from a number of conditions, including pneumothorax, necrotizing infection, trauma, malignancies, procedural interventions and complications after thoracic surgery. Numerous therapeutic options, including noninvasive and invasive techniques, are available to treat PALs. Recently, endobronchial one-way valves have been used to treat PAL. We conducted a systematic review based on studies retrieved from PubMed, EMbase and Cochrane library...
November 6, 2017: Respiratory Research
https://www.readbyqxmd.com/read/29100513/ghrelin-therapy-improves-lung-and-cardiovascular-function-in-experimental-emphysema
#10
Nazareth de Novaes Rocha, Milena Vasconcellos de Oliveira, Cássia Lisboa Braga, Gabriela Guimarães, Lígia de Albuquerque Maia, Gisele de Araújo Padilha, Johnatas Dutra Silva, Christina Maeda Takiya, Vera Luiza Capelozzi, Pedro Leme Silva, Patricia Rieken Macedo Rocco
BACKGROUND: Emphysema is a progressive disease characterized by irreversible airspace enlargement followed by a decline in lung function. It also causes extrapulmonary effects, such as loss of body mass and cor pulmonale, which are associated with shorter survival and worse clinical outcomes. Ghrelin, a growth-hormone secretagogue, stimulates muscle anabolism, has anti-inflammatory effects, promotes vasodilation, and improves cardiac performance. Therefore, we hypothesized that ghrelin might reduce lung inflammation and remodelling as well as improve lung mechanics and cardiac function in experimental emphysema...
November 3, 2017: Respiratory Research
https://www.readbyqxmd.com/read/29100503/prognostic-and-diagnostic-significance-of-copeptin-in-acute-exacerbation-of-chronic-obstructive-pulmonary-disease-and-acute-heart-failure-data-from-the-ace-2-study
#11
Jacob A Winther, Jon Brynildsen, Arne Didrik Høiseth, Heidi Strand, Ivar Følling, Geir Christensen, Ståle Nygård, Helge Røsjø, Torbjørn Omland
BACKGROUND: Copeptin is a novel biomarker that predicts mortality in lower respiratory tract infections and heart failure (HF), but the diagnostic value of copeptin in acute dyspnea and the prognostic significance of copeptin in acute exacerbation of chronic obstructive pulmonary disease (AECOPD) is not clear. METHOD: We determined copeptin and NT-proBNP concentrations at hospital admission in 314 patients with acute dyspnea who were categorized by diagnosis. Survival was registered after a median follow-up of 816 days, and the prognostic and diagnostic properties of copeptin and NT-proBNP were analyzed in acute HF (n = 143) and AECOPD (n = 84) separately...
November 3, 2017: Respiratory Research
https://www.readbyqxmd.com/read/29096627/a-28-day-randomized-double-blind-placebo-controlled-parallel-group-study-of-nebulized-revefenacin-in-patients-with-chronic-obstructive-pulmonary-disease
#12
Krishna K Pudi, Chris N Barnes, Edmund J Moran, Brett Haumann, Edward Kerwin
BACKGROUND: Revefenacin is a once-daily long-acting muscarinic antagonist (LAMA) in clinical development for the treatment of patients with chronic obstructive pulmonary disease (COPD). In a dose-ranging study, nebulized once-daily revefenacin had a long duration of action in patients after 7 days' administration of doses up to 700 μg. In this multiple-dose study, the bronchodilation efficacy and adverse events profile were characterized in patients administered nebulized revefenacin once daily for 28 days...
November 2, 2017: Respiratory Research
https://www.readbyqxmd.com/read/29096609/asthma-copd-overlap-is-not-a-homogeneous-disorder-further-supporting-data
#13
LETTER
Luis Pérez-de-Llano, Borja G Cosio
Asthma-COPD ovelap (ACO) is an umbrella term that encompasses patients with COPD and eosinophilic inflammation (e-COPD) and smoking asthmatics with non-fully reversible airflow obstruction (SA). We compared the clinical characteristics and the inflammatory profile of e-COPD and SA. Patients classified as e-COPD were older and more often male and showed significantly impaired pulmonary function (likely explained by a heavier smoking habit). On the contrary, SA had more atopic features, more reversibility of airflow obstruction and higher IgE levels...
November 2, 2017: Respiratory Research
https://www.readbyqxmd.com/read/29084563/neutrophil-extracellular-traps-in-patients-with-pulmonary-tuberculosis
#14
LETTER
Anne Jan van der Meer, Sacha Zeerleder, Dana C Blok, Liesbeth M Kager, Ivar O Lede, Wahid Rahman, Rumana Afroz, Aniruddha Ghose, Caroline E Visser, Abu Shahed Md Zahed, Md Anwar Husain, Khan Mashrequl Alam, Pravat Chandra Barua, Mahtabuddin Hassan, Md Abu Tayab, Arjen M Dondorp, Tom van der Poll
Tuberculosis is a devastating infectious disease causing many deaths worldwide. Recent investigations have implicated neutrophil extracellular traps (NETs) in the host response to tuberculosis. The aim of the current study was to obtain evidence for NETs release in the circulation during human tuberculosis. For this we measured the plasma concentrations of nucleosomes in conjunction with neutrophil elastase, in 64 patients with active pulmonary tuberculosis and 32 healthy controls. Patients with active tuberculosis had elevated plasma levels of nucleosomes and elastase when compared with local healthy blood donors...
October 30, 2017: Respiratory Research
https://www.readbyqxmd.com/read/29065892/the-value-of-blood-cytokines-and-chemokines-in-assessing-copd
#15
Eric Bradford, Sean Jacobson, Jason Varasteh, Alejandro P Comellas, Prescott Woodruff, Wanda O'Neal, Dawn L DeMeo, Xingnan Li, Victor Kim, Michael Cho, Peter J Castaldi, Craig Hersh, Edwin K Silverman, James D Crapo, Katerina Kechris, Russell P Bowler
BACKGROUND: Blood biomarkers are increasingly used to stratify high risk chronic obstructive pulmonary disease (COPD) patients; however, there are fewer studies that have investigated multiple biomarkers and replicated in multiple large well-characterized cohorts of susceptible current and former smokers. METHODS: We used two MSD multiplex panels to measure 9 cytokines and chemokines in 2123 subjects from COPDGene and 1117 subjects from SPIROMICS. These biomarkers included: interleukin (IL)-2, IL-6, IL-8, IL-10, tumor necrosis factor (TNF)-α, interferon (IFN)-γ, eotaxin/CCL-11, eotaxin-3/CCL-26, and thymus and activation-regulated chemokine (TARC)/CCL-17...
October 24, 2017: Respiratory Research
https://www.readbyqxmd.com/read/29065885/serum-bilirubin-and-the-risk-of-chronic-obstructive-pulmonary-disease-exacerbations
#16
Kirstin E Brown, Don D Sin, Helen Voelker, John E Connett, Dennis E Niewoehner, Ken M Kunisaki
BACKGROUND: Bilirubin is a potent anti-oxidant and higher serum concentrations of bilirubin have been associated with better lung function, slower lung function decline, and lower incidence of chronic obstructive pulmonary disease (COPD). We sought to determine whether elevated bilirubin blood concentrations are associated with lower risk for acute exacerbations of COPD (AECOPD). METHODS: We performed a secondary analyses of data in the Simvastatin for Prevention of Exacerbations in Moderate-to-Severe COPD (STATCOPE) and the Azithromycin for Prevention of Exacerbations of COPD (MACRO) studies...
October 24, 2017: Respiratory Research
https://www.readbyqxmd.com/read/29041938/development-of-breath-test-for-pneumoconiosis-a-case-control-study
#17
Hsiao-Yu Yang, Ruei-Hao Shie, Che-Jui Chang, Pau-Chung Chen
BACKGROUND: Lipid peroxidation plays an important role in the pathogenesis of pneumoconiosis. Volatile organic compounds (VOCs) generated from lipid peroxidation might be used to detect pneumoconiosis. The objective of this study was to develop a breath test for pneumoconiosis. METHODS: A case-control study was designed. Breath and ambient air were analysed by gas chromatography/mass spectrometry. After blank correction to prevent contamination from ambient air, we used canonical discriminant analysis (CDA) to assess the discrimination accuracy and principal component analysis (PCA) to generate a prediction score...
October 17, 2017: Respiratory Research
https://www.readbyqxmd.com/read/29037205/vildagliptin-ameliorates-pulmonary-fibrosis-in-lipopolysaccharide-induced-lung-injury-by-inhibiting-endothelial-to-mesenchymal-transition
#18
Toshio Suzuki, Yuji Tada, Santhi Gladson, Rintaro Nishimura, Iwao Shimomura, Satoshi Karasawa, Koichiro Tatsumi, James West
BACKGROUND: Pulmonary fibrosis is a late manifestation of acute respiratory distress syndrome (ARDS). Sepsis is a major cause of ARDS, and its pathogenesis includes endotoxin-induced vascular injury. Recently, endothelial-to-mesenchymal transition (EndMT) was shown to play an important role in pulmonary fibrosis. On the other hand, dipeptidyl peptidase (DPP)-4 was reported to improve vascular dysfunction in an experimental sepsis model, although whether DPP-4 affects EndMT and fibrosis initiation during lipopolysaccharide (LPS)-induced lung injury is unclear...
October 16, 2017: Respiratory Research
https://www.readbyqxmd.com/read/28964260/factors-associated-with-hospitalization-in-bronchiectasis-exacerbations-a-one-year-follow-up-study
#19
Rosario Menéndez, Raúl Méndez, Eva Polverino, Edmundo Rosales-Mayor, Isabel Amara-Elori, Soledad Reyes, Tomás Posadas, Laia Fernández-Barat, Antoni Torres
BACKGROUND: Bronchiectasis (BE) is a chronic structural lung disease with frequent exacerbations, some of which require hospital admission though no clear associated factors have been identified. We aimed to evaluate factors associated with hospitalization due to exacerbations during a 1-year follow-up period. METHODS: A prospective observational study was performed in patients recruited from specialized BE clinics. We considered all exacerbations diagnosed and treated with antibiotics during a follow-up period of 1 year...
September 30, 2017: Respiratory Research
https://www.readbyqxmd.com/read/28962654/prospective-comparison-of-non-invasive-risk-markers-of-major-cardiovascular-events-in-copd-patients
#20
Jorge Zagaceta, Gorka Bastarrika, Javier J Zulueta, Inmaculada Colina, Ana B Alcaide, Arantza Campo, Miguel Divo, Ciro Casanova, José M Marin, Victor M Pinto-Plata, Bartolome R Celli, Juan P de-Torres
BACKGROUND: Chronic Obstructive Pulmonary Disease (COPD) is an independent risk factor for cardiovascular (CV) disease, one of the most frequent causes of death in COPD patients. The goal of the present study was to evaluate the prognostic value of non-invasive CV risk markers in COPD patients. METHODS: CV risk was prospectively evaluated in 287 COPD patients using non-invasive markers including the Framingham score, the Systematic Coronary Risk Evaluation (SCORE) charts, coronary arterial calcium (CAC), epicardial adipose tissue (EAT), as well as clinical, biochemical and physiological variables...
September 29, 2017: Respiratory Research
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