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https://www.readbyqxmd.com/read/28526682/aeroallergens-induce-reactive-oxygen-species-production-and-dna-damage-and-dampen-antioxidant-responses-in-bronchial-epithelial-cells
#1
Tze Khee Chan, W S Daniel Tan, Hong Yong Peh, W S Fred Wong
Exposure to environmental allergens is a major risk factor for asthma development. Allergens possess proteolytic activity that is capable of disrupting the airway epithelium. Although there is increasing evidence pointing to asthma as an epithelial disease, the underlying mechanism that drives asthma has not been fully elucidated. In this study, we investigated the direct DNA damage potential of aeroallergens on human bronchial epithelial cells and elucidated the mechanisms mediating the damage. Human bronchial epithelial cells, BEAS-2B, directly exposed to house dust mites (HDM) resulted in enhanced DNA damage, as measured by the CometChip and the staining of DNA double-strand break marker, γH2AX...
May 19, 2017: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/28521083/inflammatory-infiltrate-and-mucosal-remodeling-in-chronic-rhinosinusitis-with-and-without-polyps-structured-histopathologic-analysis
#2
Hannah N Kuhar, Bobby A Tajudeen, Mahboobeh Mahdavinia, Paolo Gattuso, Ritu Ghai, Pete S Batra
BACKGROUND: Chronic rhinosinusitis (CRS) is commonly classified into CRS with nasal polyps (CRSwNP) and CRS without nasal polyps (CRSsNP). Structured histopathologic reporting has the potential to identify salient histologic markers to differentiate subtypes and provide insights into pathophysiologic mechanisms in CRS. METHODS: A structured histopathology report of 13 variables was prospectively employed to analyze ethmoid sinus tissue removed during endoscopic sinus surgery for 99 patients, including 43 CRSsNP and 56 CRSwNP...
May 18, 2017: International Forum of Allergy & Rhinology
https://www.readbyqxmd.com/read/28515402/differences-in-fraction-of-exhaled-nitric-oxide-values-measured-by-two-hand-helded-analyzers-nobreath-%C3%A2-and-niox-vero-%C3%A2
#3
Takahiro Tsuburai, Yousuke Kamide, Yuto Nakamura, Yasuhiro Tomita, Yuto Hamada, Kentaro Watai, Hiroaki Hayashi, Kiyoshi Sekiya, Chihiro Mitsui, Yuma Fukutomi, Akio Mori, Masami Taniguchi
BACKGROUND: The fraction of exhaled nitric oxide (FENO) is a useful marker of asthma control. The FENO measurement with two hand-helded analyzers (NObreath(®) and NIOX Vero(®)) may be more affordable, no studies have examined the differences in FENO values measured with those methods in adult. METHODS: The study population comprised 44 subjects at our outpatient clinic. FeNO values (FENOb and FENOv) were measured by two methods (NObreath(®) and NIOX Vero(®))...
2017: Arerugī, [Allergy]
https://www.readbyqxmd.com/read/28514613/kit-inhibition-by-imatinib-in-patients-with-severe-refractory-asthma
#4
RANDOMIZED CONTROLLED TRIAL
Katherine N Cahill, Howard R Katz, Jing Cui, Juying Lai, Shamsah Kazani, Allison Crosby-Thompson, Denise Garofalo, Mario Castro, Nizar Jarjour, Emily DiMango, Serpil Erzurum, Jennifer L Trevor, Kartik Shenoy, Vernon M Chinchilli, Michael E Wechsler, Tanya M Laidlaw, Joshua A Boyce, Elliot Israel
BACKGROUND: Mast cells are present in the airways of patients who have severe asthma despite glucocorticoid treatment; these cells are associated with disease characteristics including poor quality of life and inadequate asthma control. Stem cell factor and its receptor, KIT, are central to mast-cell homeostasis. We conducted a proof-of-principle trial to evaluate the effect of imatinib, a KIT inhibitor, on airway hyperresponsiveness, a physiological marker of severe asthma, as well as on airway mast-cell numbers and activation in patients with severe asthma...
May 18, 2017: New England Journal of Medicine
https://www.readbyqxmd.com/read/28512018/nanoencapsulation-of-a-glucocorticoid-improves-barrier-function-and-anti-inflammatory-effect-on-monolayers-of-pulmonary-epithelial-cell-lines
#5
Lucas A Rigo, Cristiane S Carvalho-Wodarz, Adriana R Pohlmann, Silvia S Guterres, Nicole Schneider-Daum, Claus-Michael Lehr, Ruy C R Beck
The anti-inflammatory effect of polymeric deflazacort nanocapsules (NC-DFZ) was investigated, and possible improvement of epithelial barrier function using filter grown monolayers of A549 and Calu-3 using as models was assessed. NC prepared from poly(ε-caprolactone) (PCL) had a mean size around 200 nm, slightly negative zeta potential (∼ - 8 mV), and low polydispersity index (< 0.10). Encapsulation of DFZ had an efficiency of 85%. No cytotoxic effects were observed at particle concentration of 9.85 x 10(11) NC/ml, which was therefore chosen to evaluate the effect of NC-DFZ at 1% (w/v) of PCL and 0...
May 13, 2017: European Journal of Pharmaceutics and Biopharmaceutics
https://www.readbyqxmd.com/read/28508234/surgical-treatment-of-extraesophageal-manifestations-of-gastroesophageal-reflux-disease
#6
REVIEW
Feroze Sidwa, Alessandra L Moore, Elaine Alligood, P Marco Fisichella
OBJECTIVE: To review the current literature on the role of antireflux surgery (ARS) for the treatment of extraesophageal manifestations of GERD. The extraesophageal manifestations of gastroesophageal reflux disease (GERD) include chronic cough, laryngopharyngeal reflux, and asthma. They are responsible for significant morbidity in affected patients and a high economic burden on healthcare resources. We recently published a larger review on the symptoms, diagnosis, medical, and surgical treatment of the extraesophageal manifestations of GERD...
May 15, 2017: World Journal of Surgery
https://www.readbyqxmd.com/read/28502680/semaphorin-3a-is-a-key-player-in-the-pathogenesis-of-asthma
#7
Ronen Cozacov, Katlin Halasz, Tharwat Haj, Zahava Vadasz
Immune semaphorins are key players in regulating immune mediated inflammation. Semaphorin3A (sema3A) a secreted and membrane bound member of this family, is well reported for its properties in maintaining self-tolerance. Semaphorin3A was recognized to be a marker for T-regulatory cells (Tregs), and as such is a useful tool for assessing the status of these cells in preventing immune mediated diseases. This study was designed aiming to evaluate how sema3A is possibly involved in bronchial asthma. Here, we found sema3A serum levels and the expression of sema3A on Tregs significantly lower in patients with moderate to severe asthma when compared to healthy individuals...
May 11, 2017: Clinical Immunology: the Official Journal of the Clinical Immunology Society
https://www.readbyqxmd.com/read/28502415/effects-of-acute-psychological-stress-induced-in-laboratory-on-physiological-responses-in-asthma-populations-a-systematic-review
#8
REVIEW
Annik Plourde, Kim L Lavoie, Candace Raddatz, Simon L Bacon
BACKGROUND: Psychological stress has long been suspected to have a deleterious effect on asthma, with acute psychological stress being associated with physiological responses in asthma patients. OBJECTIVES: The purpose of this systematic review was to provide a narrative synthesis of the impact of acute laboratory psychological stress on physiological responses among asthma patients. METHODS: An extensive search was conducted by two independent authors using Pubmed, PsycINFO, PsyArticles and the Cochrane Library electronic databases (up to September 2016)...
June 2017: Respiratory Medicine
https://www.readbyqxmd.com/read/28493984/nasal-airway-epithelial-cell-il-6-and-fkbp51-gene-expression-and-steroid-sensitivity-in-asthmatic-children
#9
Michael Fayon, Aurelie Lacoste-Rodrigues, Pascal Barat, Jean-Christophe Helbling, Fabienne Nacka, Patrick Berger, Marie-Pierre Moisan, Jean-Benoit Corcuff
BACKGROUND: Many asthmatic patients exhibit uncontrolled asthma despite high-dose inhaled corticosteroids (ICS). Airway epithelial cells (AEC) have distinct activation profiles that can influence ICS response. OBJECTIVES: A pilot study to identify gene expression markers of AEC dysfunction and markers of corticosteroid sensitivity in asthmatic and non-asthmatic control children, for comparison with published reports in adults. METHODS: AEC were obtained by nasal brushings and primary submerged cultures, and incubated in control conditions or in the presence of 10 ng/ml TNFalpha, 10-8M dexamethasone, or both...
2017: PloS One
https://www.readbyqxmd.com/read/28482883/rescue-medication-use-as-a-patient-reported-outcome-in-copd-a-systematic-review-and-regression-analysis
#10
Yogesh Suresh Punekar, Sheetal Sharma, Ankit Pahwa, Jitender Takyar, Ian Naya, Paul W Jones
BACKGROUND: Reducing rescue medication use is a guideline-defined goal of asthma treatment, however, little is known about the validity of rescue medicine use as a marker of symptoms in chronic obstructive pulmonary disease (COPD). To improve patient outcomes, greater insight is needed into the relationship between rescue medication use and alternative COPD outcomes. METHODS: A systematic search of electronic databases (Embase®, MEDLINE® and Cochrane CENTRAL) was conducted from database start to 26 May, 2015...
May 8, 2017: Respiratory Research
https://www.readbyqxmd.com/read/28481620/ifn%C3%AE-influences-epithelial-anti-viral-responses-via-histone-methylation-of-the-rig-i-promoter
#11
C Mirella Spalluto, Akul Singhania, Doriana Cellura, Christopher H Woelk, Tilman Sanchez-Elsner, Karl J Staples, Tom M A Wilkinson
The asthmatic lung is prone to respiratory viral infections that exacerbate the symptoms of the underlying disease. Recent work has suggested that a deficient Th1 response in early life may lead to these aberrant anti-viral responses. We investigated whether the inflammatory environment of the airway epithelium could modulate anti-viral gene expression via epigenetic mechanisms, in order to study the development of a long-term dysregulation of innate responses, which are a hallmark of asthma. We primed AALEB, a human bronchial epithelial cell line, with IFNγ and IL13 and subsequently infected cells with Respiratory Syncytial Virus (RSV) and innate anti-viral genes expression and their epigenetic markers were analysed...
May 8, 2017: American Journal of Respiratory Cell and Molecular Biology
https://www.readbyqxmd.com/read/28474652/correlation-of-total-serum-immunoglobulin-e-level-sputum-and-peripheral-eosinophil-count-in-assessing-the-clinical-severity-in-bronchial-asthma
#12
Roshan M Kumar, R Pajanivel, G Koteeswaran, Surendra K Menon, Pravin Mv Charles
CONTEXT: Asthma is a chronic inflammatory disorder of the airway with involvement of various cellular populations and release of many inflammatory mediators. Eosinophils and serum immunoglobulin E (IgE) are considered a good marker of airway inflammation in asthma. The correlation of clinical assessment with various markers of airway inflammation in asthma is not well established in the Indian population. AIMS: This study aims to study the correlation of serum IgE, sputum eosinophil count, and peripheral eosinophil count with clinical severity of Asthma...
May 2017: Lung India: Official Organ of Indian Chest Society
https://www.readbyqxmd.com/read/28474651/squat-to-stand-test-in-functional-assessment-of-stable-chronic-obstructive-pulmonary-disease-patients
#13
Prahlad Rai Gupta, Asif Feroz, Sachet Dawar, Harshdeep Bhangoo, Shivani Swami, T K Khublani
BACKGROUND: Assessment of functional status is vital for proper therapy and rehabilitation programs in chronic obstructive pulmonary disease (COPD) patients. Traditionally, 6 min walk test (6MWT) has been used but it by itself may not reflect the total functional status in these patients as it poorly correlates to the disease severity. A sit-to-stand test (STST) has been proposed as a better alternative to 6MWT but to test their ability to stand from the squatting position, i.e., a squat-to-stand test (SqTST) will be more appropriate in rural patients...
May 2017: Lung India: Official Organ of Indian Chest Society
https://www.readbyqxmd.com/read/28474411/a-trial-of-oral-corticosteroids-for-persistent-systemic-and-airway-inflammation-in-severe-asthma
#14
Keiji Oishi, Tsunahiko Hirano, Ryo Suetake, Syuichiro Ohata, Yoshikazu Yamaji, Kosuke Ito, Nobutaka Edakuni, Kazuto Matsunaga
INTRODUCTION: The fraction of exhaled nitric oxide (FeNO) and blood eosinophils, markers of local and systemic eosinophilic inflammation, respectively, are increased in asthmatic patients. Little is known concerning the relationship between the FeNO levels and blood eosinophils in asthmatics. METHODS: Twenty severe asthmatics with persistent FeNO elevation (≥40 ppb) and blood eosinophilia (≥3%) despite maintenance therapy including high-daily-dose inhaled corticosteroids were analyzed...
May 4, 2017: Immunity, Inflammation and Disease
https://www.readbyqxmd.com/read/28474352/airway-basophils-are-increased-and-activated-in-eosinophilic-asthma
#15
Yoshihiro Suzuki, Keiko Wakahara, Tomoko Nishio, Satoru Ito, Yoshinori Hasegawa
BACKGROUND: The impact of basophils on asthma pathogenesis remains largely unexplored, particularly in humans. Here, we evaluated the frequencies and activation status of basophils in the sputum of adult asthmatic patients and related our findings to other parameters of eosinophilic airway inflammation. METHODS: We enrolled 44 adult asthmatic patients who were being treated with inhaled corticosteroids (ICS). Analysis of the induced sputum, exhaled nitric oxide fraction (FeNO) measurement, and Asthma Control Test (ACT) were carried out together with standard blood and pulmonary function tests...
May 5, 2017: Allergy
https://www.readbyqxmd.com/read/28473327/autophagy-plays-a-role-in-fstl1-induced-emt-and-airway-remodeling-in-asthma
#16
Tian Liu, Yahui Liu, Marina Miller, Liuzhao Cao, Jiping Zhao, Jinxiang Wu, Junfei Wang, Lin Liu, Shuo Li, Minfang Zou, Jiawei Xu, David H Broide, Liang Dong
Asthma is a chronic disease related to airway hyper-responsiveness and airway remodeling. Airway remodeling is the important reason of refractory asthma and is associated with differentiation of airway epithelia into myofibroblasts via epithelial-mesenchymal transition (EMT) to increase the process of subepithelial fibrosis. There is growing evidence that autophagy modulates remodeling. However, the underlying molecular mechanisms of these effects are still unclear. In this study, we hypothesized that Follistatin-like 1(FSTL1) promotes EMT and airway remodeling by intensifying autophagy...
May 4, 2017: American Journal of Physiology. Lung Cellular and Molecular Physiology
https://www.readbyqxmd.com/read/28473323/gabaa-receptor-%C3%AE-4-subunit-knockout-enhances-lung-inflammation-and-airway-reactivity-in-a-murine-asthma-model
#17
Gene T Yocum, Damian L Turner, Jennifer Danielsson, Matthew B Barajas, Yi Zhang, Dingbang Xu, Neil Harrison, Gregg E Homanics, Donna L Farber, Charles W Emala
Emerging evidence indicates that hypnotic anesthetics affect immune function. Many anesthetics potentiate γ-aminobutyric acid A receptor (GABAAR) activation, and these receptors are expressed on multiple subtypes of immune cells, providing a potential mechanistic link. Like immune cells, airway smooth muscle (ASM) cells also express GABAARs, particularly isoforms containing α4 subunits, and activation of these receptors leads to ASM relaxation. We sought to determine if GABAAR signaling modulates the ASM contractile and inflammatory phenotype of a murine allergic asthma model utilizing GABAAR α4 subunit global knockout (KO; Gabra4(0/0)) mice...
May 4, 2017: American Journal of Physiology. Lung Cellular and Molecular Physiology
https://www.readbyqxmd.com/read/28461289/associations-in-asthma-between-quantitative-computed-tomography-and%C3%A2-bronchial-biopsy-derived-airway-remodelling
#18
Rachid Berair, Ruth Hartley, Vijay Mistry, Ajay Sheshadri, Sumit Gupta, Amisha Singapuri, Sherif Gonem, Richard P Marshall, Ana R Sousa, Aarti Shikotra, Richard Kay, Andrew Wardlaw, Peter Bradding, Salman Siddiqui, Mario Castro, Christopher E Brightling
Airway remodelling in asthma remains poorly understood. This study aimed to determine the association of airway remodelling measured on bronchial biopsies with 1) lung function impairment and 2) thoracic quantitative computed tomography (QCT)-derived morphometry and densitometry measures of proximal airway remodelling and air trapping.Subjects were recruited from a single centre. Bronchial biopsy remodelling features that were the strongest predictors of lung function impairment and QCT-derived proximal airway morphometry and air trapping markers were determined by stepwise multiple regression...
May 2017: European Respiratory Journal: Official Journal of the European Society for Clinical Respiratory Physiology
https://www.readbyqxmd.com/read/28458533/the-association-between-risk-of-airflow-limitation-and-serum-uric-acid-measured-at-medical-health-check-ups
#19
Atsuro Fukuhara, Junpei Saito, Suguru Sato, Kazue Saito, Naoko Fukuhara, Yoshinori Tanino, Xintao Wang, Katsuaki Rinno, Hitoshi Suzuki, Mitsuru Munakata
The prevalence of COPD and asthma is increasing all over the world; however, their morbidities are thought to be greatly underestimated because of unawareness of patients' conditions and respiratory symptoms. Spirometry is useful for the early detection of COPD and asthma with airflow limitation (AL), although it is not yet widely used for screening in epidemiological and primary care settings. A simple predictive marker used in combination with spirometry for AL is expected to be established. In medical health check-ups, serum uric acid (s-UA) is measured when screening for gout and has recently been suggested to have an association with several respiratory disorders, including asthma and COPD...
2017: International Journal of Chronic Obstructive Pulmonary Disease
https://www.readbyqxmd.com/read/28453377/investigation-of-the-relationship-between-asthma-and-subclinical-atherosclerosis-by-carotid-femoral-intima-media-and-epicardial-fat-thickness-measurement
#20
Mustafa Yılmaz, Hatice Eylül Bozkurt Yılmaz, Nazan Şen, Cihan Altın, Abdullah Tekin, Haldun Müderrisoğlu
OBJECTIVE: Since asthma and atherosclerosis may share similar pathophysiological mechanism, this study is planned to investigate whether epicardial fat thickness (EFT), carotid and femoral intima media thicknesses, which are markers of subclinical atherosclerosis, are increased in patients with asthma. METHODS: The study was designed as a cross-sectional study. A total of 154 participants (83 patients with asthma and 71 healthy volunteers) were enrolled into the study...
April 28, 2017: Journal of Asthma: Official Journal of the Association for the Care of Asthma
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