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Respiratory Research

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https://www.readbyqxmd.com/read/28302109/interaction-of-cd14-haplotypes-and-soluble-cd14-on-pulmonary-function-in-agricultural-workers
#1
Tricia D LeVan, Lynette M Smith, Art J Heires, Ted R Mikuls, Jane L Meza, Lisa A Weissenburger-Moser, Debra J Romberger
BACKGROUND: Agricultural environments are contaminated with organic dusts containing bacterial components. Chronic inhalation of organic dusts is implicated in respiratory diseases. CD14 is a critical receptor for gram-negative lipopolysaccharide; however, its association with respiratory disease among agricultural workers is unknown. The objective of this study was to determine if serum soluble CD14 (sCD14) levels are associated with lung function among agricultural workers and if this association is modified by genetic variants in CD14...
March 16, 2017: Respiratory Research
https://www.readbyqxmd.com/read/28298222/increased-il-17ra-and-il-17rc-in-end-stage-copd-and-the-contribution-to-mast-cell-secretion-of-fgf-2-and-vegf
#2
LETTER
Abraham B Roos, Michiko Mori, Harpreet K Gura, Axel Lorentz, Leif Bjermer, Hans Jürgen Hoffmann, Jonas S Erjefält, Martin R Stampfli
Mast cells are accumulated in advanced chronic obstructive pulmonary disease (COPD), and interleukin (IL)-17 signaling plays a role in disease progression. The expression, localization and functional relevance of IL-17 receptor (R)A and IL-17RC was explored in COPD by immunodetection, and functional assays.IL-17RA and IL-17RC was increased in very severe COPD, and expressed by mast cells. Increased secretion of the pro-angiogenic basic fibroblast growth factor and vascular endothelial growth factor was observed in vitro-maintained mast cells stimulated with IL-17A...
March 15, 2017: Respiratory Research
https://www.readbyqxmd.com/read/28288643/chronic-hypoxia-aggravates-monocrotaline-induced-pulmonary-arterial-hypertension-a-rodent-relevant-model-to-the-human-severe-form-of-the-disease
#3
LETTER
Florence Coste, Christelle Guibert, Julie Magat, Emma Abell, Fanny Vaillant, Mathilde Dubois, Arnaud Courtois, Philippe Diolez, Bruno Quesson, Roger Marthan, Jean-Pierre Savineau, Bernard Muller, Véronique Freund-Michel
Pulmonary arterial hypertension (PAH) is a severe form of pulmonary hypertension that combines multiple alterations of pulmonary arteries, including, in particular, thrombotic and plexiform lesions. Multiple-pathological-insult animal models, developed to more closely mimic this human severe PAH form, often require complex and/or long experimental procedures while not displaying the entire panel of characteristic lesions observed in the human disease. In this study, we further characterized a rat model of severe PAH generated by combining a single injection of monocrotaline with 4 weeks exposure to chronic hypoxia...
March 14, 2017: Respiratory Research
https://www.readbyqxmd.com/read/28284212/combination-of-glycopyrronium-and-indacaterol-inhibits-carbachol-induced-erk5-signal-in-fibrotic-processes
#4
Yukiko Namba, Shinsaku Togo, Miniwan Tulafu, Kotaro Kadoya, Kumi Yoneda Nagahama, Hikari Taka, Naoko Kaga, Akira Orimo, Xiangde Liu, Kazuhisa Takahashi
BACKGROUND: Airway fibrosis is one of the pathological features of chronic obstructive pulmonary disease (COPD), and recent studies revealed that acetylcholine plays an important role in the development of airway remodeling by stimulating proliferation and collagen synthesis of lung fibroblasts. This study was designed to examine the effects of a long-acting muscarinic receptor antagonist (LAMA) glycopyrronium and a long-acting β2 adrenergic receptor agonist (LABA) indacaterol on acetylcholine-mediated fibrotic responses in lung fibroblasts...
March 11, 2017: Respiratory Research
https://www.readbyqxmd.com/read/28264721/densitometric-and-local-histogram-based-analysis-of-computed-tomography-images-in-patients-with-idiopathic-pulmonary-fibrosis
#5
Samuel Y Ash, Rola Harmouche, Diego Lassala Lopez Vallejo, Julian A Villalba, Kris Ostridge, River Gunville, Carolyn E Come, Jorge Onieva Onieva, James C Ross, Gary M Hunninghake, Souheil Y El-Chemaly, Tracy J Doyle, Pietro Nardelli, Gonzalo V Sanchez-Ferrero, Hilary J Goldberg, Ivan O Rosas, Raul San Jose Estepar, George R Washko
BACKGROUND: Prior studies of clinical prognostication in idiopathic pulmonary fibrosis (IPF) using computed tomography (CT) have often used subjective analyses or have evaluated quantitative measures in isolation. This study examined associations between both densitometric and local histogram based quantitative CT measurements with pulmonary function test (PFT) parameters and mortality. In addition, this study sought to compare risk prediction scores that incorporate quantitative CT measures with previously described systems...
March 7, 2017: Respiratory Research
https://www.readbyqxmd.com/read/28259163/the-relationship-between-the-leicester-cough-questionnaire-eosinophilic-airway-inflammation-and-asthma-patient-related-outcomes-in-severe-adult-asthma
#6
LETTER
Sushiladevi Natarajan, Robert C Free, Peter Bradding, Lorcan McGarvey, Salman Siddiqui
BACKGROUND: Severe asthma is characterised by a variety of symptoms, which include chronic cough, however the mechanisms responsible for cough reflex hypersensitivity in asthma remain poorly elucidated. Current asthma patient-related outcome instruments such as the six-point Juniper Asthma Control Score (ACQ-6) and Asthma Quality of Life Questionnaire (AQLQ) were not primarily designed to capture cough and its related morbidity in asthma. The Leicester Cough Questionnaire (LCQ) is a patient-related outcome instrument designed to capture the health-related quality of life associated with cough...
March 4, 2017: Respiratory Research
https://www.readbyqxmd.com/read/28253927/low-tissue-levels-of-mir-125b-predict-malignancy-in-solitary-fibrous-tumors-of-the-pleura
#7
Matthias Brock, Selma Hottinger, Matthias Diebold, Alex Soltermann, Wolfram Jochum, Malcolm Kohler, Lars C Huber, Daniel P Franzen
BACKGROUND: Solitary fibrous tumors of the pleura (SFTP) are rare neoplasia of the chest. A subset of SFTP follows a malignant course, sometimes several years after complete resection. Traditional scoring systems based on clinical and histological features are poor predictors of biological behavior. This study aimed to investigate tumor-associated miRNAs expression as novel biomarkers to predict the clinical behavior of SFTP. METHODS: Formalin-fixed and paraffin-embedded SFTP tissues blocks from patients surgically resected between 1992 and 2013 at two tertiary care teaching hospitals were included...
March 2, 2017: Respiratory Research
https://www.readbyqxmd.com/read/28245821/gdf-15-plasma-levels-in-chronic-obstructive-pulmonary-disease-are-associated-with-subclinical-coronary-artery-disease
#8
Carlos H Martinez, Christine M Freeman, Joshua D Nelson, Susan Murray, Xin Wang, Matthew J Budoff, Mark T Dransfield, John E Hokanson, Ella A Kazerooni, Gregory L Kinney, Elizabeth A Regan, J Michael Wells, Fernando J Martinez, MeiLan K Han, Jeffrey L Curtis
BACKGROUND: Growth differentiation factor-15 (GDF-15), a cytokine associated with cardiovascular mortality, increases during chronic obstructive pulmonary disease (COPD) exacerbations, but any role in stable COPD is unknown. We tested associations between GDF-15 and subclinical coronary atherosclerosis, assessed by coronary artery calcium (CAC) score, in COPD subjects free of clinical cardiovascular disease (CVD). METHODS: Cross-sectional analysis of COPD participants (GOLD stages 2-4) in the COPDGene cohort without CVD at enrollment, using baseline CAC (from non-EKG-gated chest computed tomography) and plasma GDF-15 (by custom ELISA)...
February 28, 2017: Respiratory Research
https://www.readbyqxmd.com/read/28241820/examining-the-role-of-abc-lipid-transporters-in-pulmonary-lipid-homeostasis-and-inflammation
#9
REVIEW
Amanda B Chai, Alaina J Ammit, Ingrid C Gelissen
Respiratory diseases including asthma and chronic obstructive pulmonary disease (COPD) are characterised by excessive and persistent inflammation. Current treatments are often inadequate for symptom and disease control, and hence new therapies are warranted. Recent emerging research has implicated dyslipidaemia in pulmonary inflammation. Three ATP-binding cassette (ABC) transporters are found in the mammalian lung - ABCA1, ABCG1 and ABCA3 - that are involved in movement of cholesterol and phospholipids from lung cells...
February 28, 2017: Respiratory Research
https://www.readbyqxmd.com/read/28231834/cluster-analysis-of-sputum-cytokine-high-profiles-reveals-diversity-in-t-h-2-high-asthma-patients
#10
Sven F Seys, Hans Scheers, Paul Van den Brande, Gudrun Marijsse, Ellen Dilissen, Annelies Van Den Bergh, Pieter C Goeminne, Peter W Hellings, Jan L Ceuppens, Lieven J Dupont, Dominique M A Bullens
BACKGROUND: Asthma is characterized by a heterogeneous inflammatory profile and can be subdivided into T(h)2-high and T(h)2-low airway inflammation. Profiling of a broader panel of airway cytokines in large unselected patient cohorts is lacking. METHODS: Patients (n = 205) were defined as being "cytokine-low/high" if sputum mRNA expression of a particular cytokine was outside the respective 10(th)/90(th) percentile range of the control group (n = 80). Unsupervised hierarchical clustering was used to determine clusters based on sputum cytokine profiles...
February 23, 2017: Respiratory Research
https://www.readbyqxmd.com/read/28231829/dual-polarization-of-human-alveolar-macrophages-progressively-increases-with-smoking-and-copd-severity
#11
Erica Bazzan, Graziella Turato, Mariaenrica Tinè, Claudia M Radu, Elisabetta Balestro, Chiara Rigobello, Davide Biondini, Marco Schiavon, Francesca Lunardi, Simonetta Baraldo, Federico Rea, Paolo Simioni, Fiorella Calabrese, Marina Saetta, Manuel G Cosio
BACKGROUND: It is known that tissue macrophages derive not only from blood monocytes but also from yolk sac or fetal liver, and the tissue of residence guides their function. When isolated, they lose tissue specific signatures, hence studies of human macrophages should be ideally done directly in the tissue. The aim of this study was to investigate directly in human lung tissue the polarization of alveolar macrophage (AM), classic (M1) or alternative (M2), in health and disease, using COPD as a model...
February 23, 2017: Respiratory Research
https://www.readbyqxmd.com/read/28222740/dibutyryl-camp-attenuates-pulmonary-fibrosis-by-blocking-myofibroblast-differentiation-via-pka-creb-cbp-signaling-in-rats-with-silicosis
#12
Yan Liu, Hong Xu, Yucong Geng, Dingjie Xu, Lijuan Zhang, Yi Yang, Zhongqiu Wei, Bonan Zhang, Shifeng Li, Xuemin Gao, Ruimin Wang, Xianghong Zhang, Darrell Brann, Fang Yang
BACKGROUND: Myofibroblasts play a major role in the synthesis of extracellular matrix (ECM) and the stimulation of these cells is thought to play an important role in the development of silicosis. The present study was undertaken to investigate the anti-fibrotic effects of dibutyryl-cAMP (db-cAMP) on rats induced by silica. METHODS: A HOPE MED 8050 exposure control apparatus was used to create the silicosis model. Rats were randomly divided into 4 groups: 1)controls for 16 w; 2)silicosis for 16 w; 3)db-cAMP pre-treatment; 4) db-cAMP post-treatment...
February 21, 2017: Respiratory Research
https://www.readbyqxmd.com/read/28219384/clarithromycin-attenuates-il-13-induced-periostin-production-in-human-lung-fibroblasts
#13
Kosaku Komiya, Shoichiro Ohta, Kazuhiko Arima, Masahiro Ogawa, Shoichi Suzuki, Yasutaka Mitamura, Satoshi Nunomura, Yasuhiro Nanri, Tomohito Yoshihara, Atsushi Kawaguchi, Jun-Ichi Kadota, Bruce K Rubin, Kenji Izuhara
BACKGROUND: Periostin is a biomarker indicating the presence of type 2 inflammation and submucosal fibrosis; serum periostin levels have been associated with asthma severity. Macrolides have immunomodulatory effects and are considered a potential therapy for patients with severe asthma. Therefore, we investigated whether macrolides can also modulate pulmonary periostin production. METHODS: Using quantitative PCR and ELISA, we measured periostin production in human lung fibroblasts stimulated by interleukin-13 (IL-13) in the presence of two 14-member-ring macrolides-clarithromycin or erythromycin-or a 16-member-ring macrolide, josamycin...
February 20, 2017: Respiratory Research
https://www.readbyqxmd.com/read/28193223/malondialdehyde-acetaldehyde-maa-adducted-surfactant-protein-induced-lung-inflammation-is-mediated-through-scavenger-receptor-a-sr-a1
#14
Muna Sapkota, Jane M DeVasure, Kusum K Kharbanda, Todd A Wyatt
BACKGROUND: Co-exposure to cigarette smoke and alcohol leads to the generation of high concentrations of acetaldehyde and malondialdehyde in the lung. These aldehydes being highly electrophilic in nature react with biologically relevant proteins such as surfactant protein D (SPD) through a Schiff base reaction to generate SPD adducted malondialdehyde-acetaldehyde adduct (SPD-MAA) in mouse lung. SPD-MAA results in an increase in lung pro-inflammatory chemokine, keratinocyte chemoattractant (KC), and the recruitment of lung lavage neutrophils...
February 13, 2017: Respiratory Research
https://www.readbyqxmd.com/read/28187789/collaboration-between-specialties-for-respiratory-allergies-in-the-international-classification-of-diseases-icd-11
#15
Luciana Kase Tanno, Moises Calderon, Jeffrey F Linzer, Robert J G Chalmers, Pascal Demoly
BACKGROUND: The International Classification of Diseases (ICD) has been grouping the allergic and hypersensitivity disorders involving the respiratory tract under topographic distribution, regardless of the underlying mechanisms, triggers or concepts currently in use for allergic and hypersensitivity conditions. In order to strengthen awareness and deliberate the creation of the new "Allergic or hypersensitivity disorders involving the respiratory tract" section of the ICD-11, we here propose make the building process public...
February 10, 2017: Respiratory Research
https://www.readbyqxmd.com/read/28187787/erratum-to-is-aclidinium-alone-or-combined-with-a-laba-a-rational-choice-for-symptomatic-copd-patients
#16
F Blasi, G W Canonica, M Miravitlles
No abstract text is available yet for this article.
February 10, 2017: Respiratory Research
https://www.readbyqxmd.com/read/28183298/acute-effects-of-nicotine-free-and-flavour-free-electronic-cigarette-use-on-lung-functions-in-healthy-and-asthmatic-individuals
#17
LETTER
Marie-Ève Boulay, Cyndi Henry, Ynuk Bossé, Louis-Philippe Boulet, Mathieu C Morissette
We designed a crossover and placebo-controlled trial to investigate the impact of a 1-h acute vaping session of nicotine-free and flavour-free e-liquid on the pulmonary functions and respiratory mechanics of healthy and asthmatic individuals. This study shows that a 1-h vaping session of a high-grade and contaminant-free mixture of propylene glycol and glycerol using a commercially available electronic cigarette performed in a controlled environment does not significantly impact pulmonary functions, respiratory mechanics or symptoms in healthy or asthmatic subjects...
February 10, 2017: Respiratory Research
https://www.readbyqxmd.com/read/28178968/imatinib-relaxes-the-pulmonary-venous-bed-of-guinea-pigs
#18
Nina A Maihöfer, Said Suleiman, Daniela Dreymüller, Paul W Manley, Rolf Rossaint, Stefan Uhlig, Christian Martin, Annette D Rieg
BACKGROUND: Recently, the IMPRES study revealed that systemic imatinib improves exercise capacity in patients with advanced pulmonary arterial hypertension. Imatinib blocks the tyrosine kinase activity of the platelet-derived growth factor (PDGF)-receptor (PDGFR), acts antiproliferative and relaxes pulmonary arteries. However so far, the relaxant effects of imatinib on pulmonary veins (PVs) and on the postcapillary resistance are unknown, although pulmonary hypertension (PH) due to left heart disease (LHD) is most common and primarily affects PVs...
February 8, 2017: Respiratory Research
https://www.readbyqxmd.com/read/28166777/associations-between-chronic-comorbidity-and-exacerbation-risk-in-primary-care-patients-with-copd
#19
Janine A M Westerik, Esther I Metting, Job F M van Boven, Waling Tiersma, Janwillem W H Kocks, Tjard R Schermer
BACKGROUND: COPD often coexists with chronic conditions that may influence disease prognosis. We investigated associations between chronic (co)morbidities and exacerbations in primary care COPD patients. METHOD: Retrospective cohort study based on 2012-2013 electronic health records from 179 Dutch general practices. Comorbidities from patients with physician-diagnosed COPD were categorized according to International Classification of Primary Care (ICPC) codes. Chi-squared tests, uni- and multivariable logistic, and Cox regression analyses were used to study associations with exacerbations, defined as oral corticosteroid prescriptions...
February 6, 2017: Respiratory Research
https://www.readbyqxmd.com/read/28158976/the-role-of-serum-procalcitonin-in-establishing-the-diagnosis-and-prognosis-of-pleural-infection
#20
Giles Dixon, Adriana Lama-Lopez, Oliver J Bintcliffe, Anna J Morley, Clare E Hooper, Nick A Maskell
BACKGROUND: Bacterial pleural infection requires prompt identification to enable appropriate investigation and treatment. In contrast to commonly used biomarkers such as C-reactive protein (CRP) and white cell count (WCC), which can be raised due to non-infective inflammatory processes, procalcitonin (PCT) has been proposed as a specific biomarker of bacterial infection. The utility of PCT in this role is yet to be validated in a large prospective trial. This study aimed to identify whether serum PCT is superior to CRP and WCC in establishing the diagnosis of bacterial pleural infection...
February 3, 2017: Respiratory Research
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