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https://www.readbyqxmd.com/read/28810625/inhaled-corticosteroids-improve-lung-function-airway-hyper-responsiveness-and-airway-inflammation-but-not-symptom-control-in-patients-with-mild-intermittent-asthma-a-meta-analysis
#1
Wei Du, Ling Zhou, Yingmeng Ni, Yuanyuan Yu, Fang Wu, Guochao Shi
It remains controversial whether inhaled corticosteroid (ICS) should be used in patients with intermittent asthma. The present study aimed to assess the effect of ICS compared with placebo or other therapies in patients with intermittent asthma. Medline, Embase and CNKI databases were searched up to June 2016 and a meta-analysis was conducted. The findings demonstrated that in adult patients, when compared with placebo, ICS increased forced expiratory volume in 1 sec FEV1 [standardized mean difference (SMD), 0...
August 2017: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/28797075/arginine-metabolic-endotypes-related-to-asthma-severity
#2
Weiling Xu, Suzy A A Comhair, Allison J Janocha, Abigail Lara, Lori A Mavrakis, Carole D Bennett, Satish C Kalhan, Serpil C Erzurum
AIMS: Arginine metabolism via inducible nitric oxide synthase (iNOS) and arginase 2 (ARG2) is higher in asthmatics than in healthy individuals. We hypothesized that a sub-phenotype of asthma might be defined by the magnitude of arginine metabolism categorized on the basis of high and low fraction of exhaled nitric oxide (FENO). METHODS: To test this hypothesis, asthmatics (n = 52) were compared to healthy controls (n = 51) for levels of FENO, serum arginase activity, and airway epithelial expression of iNOS and ARG2 proteins, in relation to clinical parameters of asthma inflammation and airway reactivity...
2017: PloS One
https://www.readbyqxmd.com/read/28783215/sensitization-to-dust-mite-defines-different-phenotypes-of-asthma-a-multicenter-study
#3
Silvia Ruggieri, Gaspare Drago, Valeria Longo, Paolo Colombo, Martin Balzan, David Bilocca, Christopher Zammit, Stephen Montefort, Gianluca Scaccianoce, Giuseppina Cuttitta, Giovanni Viegi, Fabio Cibella
BACKGROUND: Indoor allergens are risk factors for asthma: thus, the characterization of indoor air quality is important for studying environment-health relationships in children. In particular, Dermatophagoides pteronyssinus is the dominant allergen for asthma. We cross-sectionally investigated the relationships among respiratory symptoms and function, airway inflammation, allergen sensitization and indoor allergen concentration. METHODS: One hundred thirty two children aging 10-14 years and living in a Southern Mediterranean area were evaluated by parental questionnaires...
August 7, 2017: Pediatric Allergy and Immunology
https://www.readbyqxmd.com/read/28774947/bayesian-estimation-of-physiological-parameters-governing-a-dynamic-two-compartment-model-of-exhaled-nitric-oxide
#4
Patrick Muchmore, Edward B Rappaport, Sandrah P Eckel
The fractional concentration of nitric oxide in exhaled breath (feNO) is a biomarker of airway inflammation with applications in clinical asthma management and environmental epidemiology. feNO concentration depends on the expiratory flow rate. Standard feNO is assessed at 50 mL/sec, but "extended NO analysis" uses feNO measured at multiple different flow rates to estimate parameters quantifying proximal and distal sources of NO in the lower respiratory tract. Most approaches to modeling multiple flow feNO assume the concentration of NO throughout the airway has achieved a "steady-state...
August 2017: Physiological Reports
https://www.readbyqxmd.com/read/28771844/assessment-of-eosinophilic-airway-inflammation-as-a-contribution-to-the-diagnosis-of-occupational-asthma
#5
Carolina Beretta, Catherine Rifflart, Geneviève Evrard, Jacques Jamart, Joël Thimpont, Olivier Vandenplas
BACKGROUND: Ascertaining the presence of asthma through the assessment of nonspecific bronchial hyperresponsiveness (NSBH) is a key step in the diagnosis of occupational asthma (OA). We aimed at investigating whether indices of airway inflammation including fractional exhaled nitric oxide (FeNO) and sputum eosinophils would be useful adjuncts to the measurement of NSBH in diagnosing OA defined as a positive specific inhalation challenge (SIC). METHODS: The study included 240 consecutive subjects with a suspicion of OA who completed a SIC, of whom 133 showed a positive response...
August 3, 2017: Allergy
https://www.readbyqxmd.com/read/28771382/relationship-of-circulating-chemerin-and-omentin-levels-with-th17-and-th9-cell-immune-responses-in-patients-with-asthma
#6
Qing Zhou, Yu Fu, Liangan Hu, Qian Li, Meng Jin, E Jiang
OBJECTIVE: Adipokines are correlated with immune response in asthma, but data on the roles of chemerin and omentin in asthmaare limited. This studyexplored the relationship of chemerin and omentin levels with Th17 and Th9 cells in asthma. METHODS: Seventy-six asthmatics were divided into the intermittent to mild persistent (n = 28), moderate persistent (n = 26) and severe persistent (n = 22) and enrolled in the study. Additionally, 20 healthy subjects were enrolled as controls...
August 3, 2017: Journal of Asthma: Official Journal of the Association for the Care of Asthma
https://www.readbyqxmd.com/read/28758814/overweight-in-childhood-and-adolescence-does-it-lead-to-airway-hyperresponsiveness-in-adulthood
#7
L L Toennesen, A Bjerregaard, C Porsbjerg, C S Ulrik, L Harmsen, V Backer
BACKGROUND: Obesity is increasing worldwide among children and adolescents, and has been associated with an increased incidence of asthma. However, the mechanisms underlying this association are incompletely understood. OBJECTIVE: In this cohort study we aimed to investigate whether being overweight in childhood and adolescence is associated with an increased risk of airway hyperresponsiveness (AHR), a hallmark of asthma, in early adulthood. METHODS: Of 527 subjects from a random population sample of children and adolescents (7-17 years) examined at baseline, a total of 184 subjects completed the follow-up visit 20 years later and were included in the present analysis...
July 31, 2017: Journal of Asthma: Official Journal of the Association for the Care of Asthma
https://www.readbyqxmd.com/read/28749673/a-nonheme-high-spin-feno-8-complex-that-spontaneously-generates-n2o
#8
Alex M Confer, Alison C McQuilken, Hirotoshi Matsumura, Pierre Moënne-Loccoz, David P Goldberg
One-electron reduction of [Fe(NO)-(N3PyS)]BF4 (1) leads to the production of the metastable nonheme {FeNO}(8) complex, [Fe(NO)(N3PyS)] (3). Complex 3 is a rare example of a high-spin (S = 1) {FeNO}(8) and is the first example, to our knowledge, of a mononuclear nonheme {FeNO}(8) species that generates N2O. A second, novel route to 3 involves addition of Piloty's acid, an HNO donor, to an Fe(II) precursor. This work provides possible new insights regarding the mechanism of nitric oxide reductases.
July 27, 2017: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/28748646/small-airway-dysfunction-in-chronic-hypersensitivity-pneumonitis
#9
Selene Guerrero Zúñiga, Julia Sánchez Hernández, Heidegger Mateos Toledo, Mayra Mejía Ávila, Laura Gochicoa-Rangel, José Luis Miguel Reyes, Moisés Selman, Luis Torre-Bouscoulet
BACKGROUND AND OBJECTIVE: Lung biopsies from patients with hypersensitivity pneumonitis (HP) have demonstrated small airway (SA) involvement, but there is no information concerning SA function in HP, and it is unknown whether pharmacological treatment could modify its function. SA function in patients with chronic HP using ultrasonic pneumography (UPG) and impulse oscillometry (IOS) was explored. We also compared initial results with those obtained after 4 weeks of standardized treatment with azathioprine and prednisone...
July 26, 2017: Respirology: Official Journal of the Asian Pacific Society of Respirology
https://www.readbyqxmd.com/read/28731412/lung-sound-analysis-is-useful-for-monitoring-therapy-in-patients-with-bronchial-asthma
#10
T Shimoda, Y Obase, Y Nagasaka, H Nakano, R Kishikawa, T Iwanaga
BACKGROUND AND OBJECTIVE: Lung sound analysis (LSA) has been reported to be useful for predicting airway obstruction and inflammation in patients with bronchial asthma. Objectives: We examined whether the exhalation-to-inhalation sound pressure ratio in the middle frequency range (200-400 Hz) (E/I MF) is useful for monitoring therapy in patients with asthma. METHODS: The study population comprised 84 patients with mild to moderate asthma whose LSA data were available before and after 1 year of daily treatment with (budesonide 800 μg)...
2017: Journal of Investigational Allergology & Clinical Immunology
https://www.readbyqxmd.com/read/28730377/influence-of-vitamin-d-and-cotinine-on-t-regulatory-cells-and-asthma-severity-in-children
#11
Bolesław Kalicki, Agata Wawrzyniak, Agnieszka Lipińska-Opałka, Sławomir Lewicki, Robert Zdanowski
Asthma is a common chronic respiratory diseases in children. Understanding the immune mechanisms of epigenetic factors may contribute to a better control of asthma. This study seeks to determine the effects of serum vitamin D and urine cotinine on asthma severity and on T regulatory cells (Tregs) and other immune-related factors such as CD3, CD4, CD8, CD19, CD16/56, and anti-CD3 HLA-DR3. The study involved 34 children with asthma. Disease severity was assessed with the Asthma Control Test, spirometry, and the fractional exhaled nitric oxide (FeNO)...
July 21, 2017: Advances in Experimental Medicine and Biology
https://www.readbyqxmd.com/read/28724478/the-stoppa-twin-study-explains-the-exhaled-nitric-oxide-and-asthma-link-by-genetics-and-sensitization
#12
Björn Nordlund, Cecilia Lundholm, Vilhelmina Ullemar, Marianne van Hage, Anne K Örtqvist, Catarina Almqvist
BACKGROUND: The link between asthma and exhaled nitric oxide (FENO) is not completely understood. The aim of this study was to estimate the association between FENO and asthma, taking genetics, sensitization, and inhaled corticosteroids (ICS) into account. METHODS: A total of 681 twins (53% monozygotic [MZ] and 47% dizygotic [DZ]) from the population-based STOPPA study (mean age 12.6 years) were recruited and information on FENO (parts per billion), parental report of current asthma, sensitization to airborne allergens (Phadiatop; IgE ≥0...
August 2017: Twin Research and Human Genetics: the Official Journal of the International Society for Twin Studies
https://www.readbyqxmd.com/read/28716479/lower-exhaled-nitric-oxide-in-infants-with-cystic-fibrosis-compared-to-healthy-controls
#13
Insa Korten, Margot Liechti, Florian Singer, Gaudenz Hafen, Isabelle Rochat, Pinelopi Anagnostopoulou, Dominik Müller-Suter, Jakob Usemann, Alexander Moeller, Urs Frey, Philipp Latzin, Carmen Casaulta
Exhaled nitric oxide (FENO) is a well-known, non-invasive airway biomarker. In patients with Cystic Fibrosis (CF) FENO is decreased. To understand if reduced FENO is primary related to Cystic Fibrosis Transmembrane Conductance Regulator (CFTR) dysfunction or an epiphenomenon of chronic inflammation, we measured FENO in 34 infants with CF prior to clinical symptoms and in 68 healthy controls. FENO was lower in CF compared to controls (p=0.0006) and the effect was more pronounced in CF infants without residual CFTR function (p<0...
July 14, 2017: Journal of Cystic Fibrosis: Official Journal of the European Cystic Fibrosis Society
https://www.readbyqxmd.com/read/28696336/perspectives-on-exhaled-nitric-oxide
#14
Fabio Luigi Massimo Ricciardolo, Philip E Silkoff
The history of nitric oxide (NO) in respiratory field dates back to the beginning of '90s with the ancestral study by Lars Gustafsson et al. describing the presence of endogenous NO in the exhaled breath of human beings. Soon after, independent studies showed that exhaled NO concentrations (FENO) is higher in asthmatics than in normal subjects. Not all asthmatics demonstrate a high FENO reflecting heterogeneity of asthma. High values of FENO are associated with over-expression of corticosteroid-sensitive iNOS isoform and allergic/eosinophilic inflammation...
July 11, 2017: Journal of Breath Research
https://www.readbyqxmd.com/read/28660859/exhaled-nitric-oxide-measurements-in-patients-with-acute-onset-interstitial-lung-disease
#15
Keiji Oishi, Tsunahiko Hirano, Ryo Suetake, Syuichiro Ohata, Yoshikazu Yamaji, Kousuke Ito, Nobutaka Edakuni, Kazuto Matsunaga
It is important to identify the underlying cause of acute-onset interstitial lung disease (ILD). This study aims to assess whether there are differences in the exhaled nitric oxide (eNO) level between different subtypes of acute-onset ILD. Forty patients with a combination of illness ≤4 weeks in duration and diffuse radiographic infiltrates were classified into groups based on the etiology. The eNO at a flow rate of 50 ml s(-1) (FeNO), the alveolar nitric oxide concentration (Calv), and the systemic inflammatory markers of the groups were compared...
June 29, 2017: Journal of Breath Research
https://www.readbyqxmd.com/read/28645522/acute-effects-of-ambient-temperature-and-particulate-air-pollution-on-fractional-exhaled-nitric-oxide-a-panel-study-among-diabetic-patients-in-shanghai-china
#16
Huichu Li, Hongjian Bai, Changyuan Yang, Renjie Chen, Cuicui Wang, Zhuohui Zhao, Haidong Kan
BACKGROUND: Epidemiological studies have shown the associations of ambient temperature and particulate matter (PM) air pollution with respiratory morbidity and mortality. However, the underlying mechanisms have not been well characterized. The aim of this study is to investigate the associations of temperature and fine and coarse PM with fractional exhaled nitric oxide (FeNO), a well-established biomarker of respiratory inflammation. METHODS: We conducted a longitudinal panel study involving six repeated FeNO tests among 33 type 2 diabetes mellitus patients from April to June 2013 in Shanghai, China...
June 20, 2017: Journal of Epidemiology
https://www.readbyqxmd.com/read/28636794/differences-and-similarities-between-bronchopulmonary-dysplasia-and-asthma-in-schoolchildren
#17
Björn Nordlund, Anna James, Christina Ebersjö, Gunilla Hedlin, Eva B Broström
BACKGROUND: The long-term respiratory characteristics of ex-preterm children with bronchopulmonary dysplasia (BPD) are not established. The objective of this study was to describe hallmarks of BPD at school age in comparison to children with atopic asthma. METHODS: This study was a cross-sectional descriptive comparative study in a hospital-based setting. Thirty schoolchildren diagnosed with BPD (10.4 years/born at 26.6 weeks' gestation) and 30 age- and sex-matched children with asthma and sensitized to airborne allergens (IgE >0...
June 21, 2017: Pediatric Pulmonology
https://www.readbyqxmd.com/read/28624608/obesity-s-impact-on-asthma-extends-to-diagnostic-criteria
#18
Njira Lugogo, Cynthia L Green, Noah Agada, Siyi Zhang, Susanne Meghdadpour, Run Zhou, Siyun Yang, Kevin J Anstrom, Elliot Israel, Richard Martin, Robert F Lemanske, Homer Boushey, Stephen C Lazarus, Stephen I Wasserman, Mario Castro, William Calhoun, Stephen P Peters, Emily DiMango, Vernon Chinchilli, Nikolina Icitovic, Susan Kunselman, Tonya S King, Monica Kraft
BACKGROUND: The use of inflammatory biomarkers to delineate the type of lung inflammation present in asthma is increasingly common. However, the impact of obesity on these markers is unknown. OBJECTIVES: We aimed to determine the impact of obesity on conventional markers of inflammation in asthma. METHODS: We performed secondary analysis of data from 652 patients previously enrolled in two ACRN trials. We performed linear correlations between biomarkers and logistic regression analysis to determine the predictive value of IgE, blood eosinophils and FeNO in relationship to sputum eosinophils (>2%), as well as to determine if cut points existed that would maximize the sensitivity and specificity for predicting sputum eosinophilia in the three weight groups...
June 14, 2017: Journal of Allergy and Clinical Immunology
https://www.readbyqxmd.com/read/28592098/-the-effect-of-short-term-exposure-to-ambient-no-2-on-lung-function-and-fractional-exhaled-nitric-oxide-in-33-chronic-obstructive-pulmonary-disease-patients
#19
J Shan, Y Ni, W Dong, J H Xu, L Pan, H Y Li, X Yang, S W Wu, Y H Chen, F R Deng, X B Guo
Objectives: To investigate the effect of short-term exposure to ambient NO(2) has influence on lung function and fractional exhaled nitric oxide (FeNO) in chronic obstructive pulmonary disease (COPD) patients. Methods: A panel of doctor-diagnosed stable COPD patients (n=33) were recruited and repeatedly measured for lung function and FeNO from December 2013 to October 2014. The patients who lived in Beijing for more than one year and aged between 60 and 85 years old were included in the study. We excluded patients with asthma, bronchial tensor, lung cancer and other respiratory disorders other than chronic obstructive pulmonary disease and occupational exposure and chest trauma surgery patients...
June 6, 2017: Zhonghua Yu Fang Yi Xue za Zhi [Chinese Journal of Preventive Medicine]
https://www.readbyqxmd.com/read/28588744/effect-of-personal-exposure-to-black-carbon-on-changes-in-allergic-asthma-gene-methylation-measured-5%C3%A2-days-later-in-urban-children-importance-of-allergic-sensitization
#20
Kyung Hwa Jung, Stephanie Lovinsky-Desir, Beizhan Yan, David Torrone, Jennifer Lawrence, Jacqueline R Jezioro, Matthew Perzanowski, Frederica P Perera, Steven N Chillrud, Rachel L Miller
BACKGROUND: Asthma gene DNA methylation may underlie the effects of air pollution on airway inflammation. However, the temporality and individual susceptibility to environmental epigenetic regulation of asthma has not been fully elucidated. Our objective was to determine the timeline of black carbon (BC) exposure, measured by personal sampling, on DNA methylation of allergic asthma genes 5 days later to capture usual weather variations and differences related to changes in behavior and activities...
2017: Clinical Epigenetics
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