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Fractionated exhaled nitric oxide

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https://www.readbyqxmd.com/read/28926855/a-comparison-of-the-efficacy-of-once-daily-fluticasone-furoate-vilanterole-with-twice-daily-fluticasone-propionate-salmeterol-in-elderly-asthmatics
#1
Yoshihisa Ishiura, Masaki Fujimura, Yasutaka Shiba, Noriyuki Ohkura, Johsuke Hara, Miki Abo, Kazuo Kasahara
Background Asthma in the elderly population has been focused because it affects quality of life and results in a higher hospitalization rate and mortality. Fluticasone furoate (FF)/vilanterole (VI) is a novel inhaled corticosteroids (ICS)/long-acting β2 agonist (LABA) combination being developed for once-daily administration for asthma with greater anti-inflammatory activity and longer duration of bronchidilation. The Ellipta(TM) dry powder inhaler (DPI) has also been available as a new device with high levels of satisfaction and preference...
September 19, 2017: Drug Research
https://www.readbyqxmd.com/read/28916487/a-novel-statistical-model-for-analyzing-data-of-a-systematic-review-generates-optimal-cut-off-values-for-fractional-exhaled-nitric-oxide-for-asthma-diagnosis
#2
REVIEW
Antonius Schneider, Klaus Linde, Johannes B Reitsma, Susanne Steinhauser, Gerta Rücker
OBJECTIVE: Measurement of fractional exhaled nitric oxide (FENO) might substitute bronchial provocation for diagnosing asthma. However, optimal FENO thresholds for diagnosing asthma remain unclear. We re-analyzed data collected for a systematic review investigating the diagnostic accuracy of FENO measurement to exploit all available thresholds under consideration of pre-test probabilities using a newly developed statistical model. STUDY DESIGN: 150 data-sets for a total of 53 different cut-offs extracted from 26 studies with 4518 participants were analyzed with the multiple thresholds model...
September 12, 2017: Journal of Clinical Epidemiology
https://www.readbyqxmd.com/read/28915873/a-prospective-cohort-study-on-ambient-air-pollution-and-respiratory-morbidities-including-childhood-asthma-in-adolescents-from-the-western-cape-province-study-protocol
#3
Toyib Olaniyan, Mohamed Jeebhay, Martin Röösli, Rajen Naidoo, Roslynn Baatjies, Nino Künzil, Ming Tsai, Mark Davey, Kees de Hoogh, Dilys Berman, Bhawoodien Parker, Joy Leaner, Mohamed Aqiel Dalvie
BACKGROUND: There is evidence from existing literature that ambient air pollutant exposure in early childhood likely plays an important role in asthma exacerbation and other respiratory symptoms, with greater effect among asthmatic children. However, there is inconclusive evidence on the role of ambient air pollutant exposures in relation to increasing asthma prevalence as well as asthma induction in children. At the population level, little is known about the potential synergistic effects between pollen allergens and air pollutants since this type of association poses challenges in uncontrolled real life settings...
September 16, 2017: BMC Public Health
https://www.readbyqxmd.com/read/28913990/association-between-sensitization-to-mold-and-impaired-pulmonary-function-in-children-with-asthma
#4
Jung Hye Byeon, Soohyun Ri, Oyuntulga Amarsaikhan, Eunji Kim, So Hyun Ahn, Ic Sun Choi, Hyung Jin Kim, SungChul Seo, Wonsuck Yoon, Young Yoo
PURPOSE: Recent data indicate that sensitization to mold contributes to the severity and persistence of asthma. In this study, we investigated the relationships between sensitization to mold and lung function parameters in children with asthma. METHODS: We retrospectively reviewed clinical data from 551 asthmatic subjects. We selected subjects who met clinical diagnostic criteria of asthma. Their spirometry, methacholine challenge tests, and measurements of blood eosinophils, serum IgE, eosinophil cationic protein (ECP) and fractional exhaled nitric oxide (FeNO) results were included...
November 2017: Allergy, Asthma & Immunology Research
https://www.readbyqxmd.com/read/28899467/-clinical-significance-of-fractional-exhaled-nitric-oxide-combined-with-in-vitro-allergen-test-in-identifying-children-at-a-high-risk-of-asthma-among-those-with-recurrent-wheezing
#5
Wei-Peng Hou, Ya-Jie Wang, Li-Hong Qiao, Hui-Li Shen
OBJECTIVE: To investigate the clinical value of combined determination of in vitro allergens and fractional exhaled nitric oxide (FeNO) in indentifying children at a high risk of asthma among those with recurrent wheezing. METHODS: A total of 148 children with recurrent wheezing (0.5-6 years old) were enrolled as study subjects, and 80 healthy children who underwent physical examination were enrolled as the control group. Pharmacia UniCAP immunoassay analyzer was used to measure specific immunoglobulin E (sIgE)...
September 2017: Zhongguo Dang Dai Er Ke za Zhi, Chinese Journal of Contemporary Pediatrics
https://www.readbyqxmd.com/read/28892559/spirometry-adjusted-exhaled-nitric-oxide-increases-accuracy-for-assessment-of-asthma-control-in-children
#6
Carla Martins, Diana Silva, Milton Severo, João Rufo, Inês Paciência, Joana Madureira, Patrícia Padrão, Pedro Moreira, Luís Delgado, Eduardo Oliveira Fernandes, Henrique Barros, Pekka Malmberg, André Moreira
Spirometry and exhaled nitric oxide are two important complimentary tools to identify and assess asthma control in children. We aimed to determine the ability of a new suggested spirometry adjusted exhaled nitric oxide (NO) index in doing that. A random sample of 1602 schoolchildren were screened by a health questionnaire, skin-prick tests, spirometry with bronchodilation and exhaled NO. A total of 662 children were included with median (IQR) exhaled NO 11(14) ppb. ROC curves using exhaled NO equations from Malmberg, Kovesi and Buchvald, and spirometry adjusted exhaled NO values were applied to identify asthmatic children and uncontrolled asthma...
September 11, 2017: Pediatric Allergy and Immunology
https://www.readbyqxmd.com/read/28860527/relationship-between-fraction-of-exhaled-nitric-oxide-and-airway-morphology-assessed-by-three-dimensional-ct-analysis-in-asthma
#7
Koji Nishimoto, Masato Karayama, Naoki Inui, Kazutaka Mori, Masato Kono, Hironao Hozumi, Yuzo Suzuki, Kazuki Furuhashi, Noriyuki Enomoto, Tomoyuki Fujisawa, Yutaro Nakamura, Hiroshi Watanabe, Takafumi Suda
Fraction of exhaled nitric oxide (FeNO) provides information about chronic inflammation in asthma. However, its relationship with structural changes in the airways is unknown. We aimed to evaluate the correlation between computer-based airway changes and FeNO in patients with asthma. The wall area (WA) and airway inner luminal area (Ai) of the third- to sixth-generation bronchi were measured using three-dimensional computed tomography in asthmatic patients. Each value was corrected by body surface area (BSA)...
August 31, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28846444/validity-of-fractional-exhaled-nitric-oxide-and-small-airway-function-indices-in-diagnosis-of-cough-variant-asthma
#8
Chen Feng-Jia, Huang Xin-Yan, Lin Geng-Peng, Liu Yang-Li, Xie Can-Mao
BACKGROUND: Fractional exhaled nitric oxide (FeNO) is a non-invasive method used to reveal the eosinophilic inflammation of airway and to diagnose and manage asthma. The diagnostic value of FeNO in patients with cough variant asthma (CVA) is poorly understood. Small airways remain an important aspect of CVA. The use of FeNO measurement or its combination with the small airway function in differentiating CVA patients from chronic cough patients is unexplored. METHODS: From December 2012 to June 2016, patients with chronic nonproductive cough for more than 8 weeks without any wheezing or dyspnea, fever or blood-stained sputum, and abnormalities on X-ray or larger airways function based on physician's opinion were subjected to FeNO, pulmonary function, and bronchial hyperresponsiveness (BHR) tests...
August 28, 2017: Journal of Asthma: Official Journal of the Association for the Care of Asthma
https://www.readbyqxmd.com/read/28843617/model-based-clinical-pharmacology-profiling-and-exposure-response-relationships-of-the-efficacy-and-biomarker-of-lebrikizumab-in-patients-with-moderate-to-severe-asthma
#9
Rui Zhu, Yanan Zheng, Nathanael L Dirks, Shweta Vadhavkar, Jin Yan Jin, Kun Peng, Cecile T J Holweg, Julie Olsson, John G Matthews, Wendy S Putnam
Lebrikizumab is a humanized monoclonal antibody that binds to interleukin-13 and has been evaluated as a treatment for moderate-to-severe asthma. Objectives of this work were to characterize lebrikizumab pharmacokinetics (PK), identify influential covariates, and graphically explore exposure-response relationships in moderate-to-severe asthmatics. Pooled PK data from 11 studies were used in the population PK model development. Full covariate modeling was used to evaluate the impact of pre-specified covariates...
August 23, 2017: Pulmonary Pharmacology & Therapeutics
https://www.readbyqxmd.com/read/28841881/reference-values-of-fractional-excretion-of-exhaled-nitric-oxide-among-non-smokers-and-current-smokers
#10
Kjell Torén, Nicola Murgia, Linus Schiöler, Björn Bake, Anna-Carin Olin
BACKGROUND: Fractional exhaled nitric oxide (FENO) is used to assess of airway inflammation; diagnose asthma and monitor adherence to advised therapy. Reliable and accurate reference values for FENO are needed for both non-smoking and current smoking adults in the clinical setting. The present study was performed to establish reference adult FENO values among never-smokers, former smokers and current smokers. METHODS: FENO was measured in 5265 subjects aged 25-75 years in a general-population study, using a chemiluminescence (Niox ™) analyser according to the guidelines of the American Thoracic Society and the European Respiratory Society...
August 25, 2017: BMC Pulmonary Medicine
https://www.readbyqxmd.com/read/28822450/-evaluating-the-efficacy-of-fractional-exhaled-nitric-oxide-and-impulse-oscillometry-in-screening-out-cough-variant-asthma-from-patients-with-subacute-cough
#11
S Fang, S Y Chen, X He, Q X Shen, H Z Fan, X P Wu, Z K Fang, H P Yu
Objective: To evaluate the clinical value of fractional exhaled nitric oxide (FeNO) and impulse oscillometry (IOS) in screening out cough variant asthma (CVA) from patients with subacute cough. Methods: Patients with subacute cough were included from the outpatient department of Respiratory Medicine of Zhujiang Hospital of Southern Medical University from May to October in 2016. Based on "the guidelines for the diagnosis and treatment of cough (2015 edition)" , patients were classified into CVA group, and non CVP group with other causes of subacute cough...
August 8, 2017: Zhonghua Yi Xue za Zhi [Chinese medical journal]
https://www.readbyqxmd.com/read/28821285/genetic-and-epigenetic-susceptibility-of-airway-inflammation-to-pm2-5-in-school-children-new-insights-from-quantile-regression
#12
Yue Zhang, Muhammad T Salam, Kiros Berhane, Sandrah P Eckel, Edward B Rappaport, William S Linn, Rima Habre, Theresa M Bastain, Frank D Gilliland
BACKGROUND: The fractional concentration of exhaled nitric oxide (FeNO) is a biomarker of airway inflammation that has proved to be useful in investigations of genetic and epigenetic airway susceptibility to ambient air pollutants. For example, susceptibility to airway inflammation from exposure to particulate matter with aerodynamic diameter < =2.5 μm (PM2.5) varies by haplotypes and promoter region methylation in inducible nitric oxide synthase (iNOS encoded by NOS2). We hypothesized that PM2...
August 18, 2017: Environmental Health: a Global Access Science Source
https://www.readbyqxmd.com/read/28818874/airway-calibre-variation-is-a-major-determinant-of-exhaled-nitric-oxide-s-ability-to-capture-asthma-control
#13
Alain Michils, Amaryllis Haccuria, Sebastien Michiels, Alain Van Muylem
Changes in airway calibre have the potential to modify exhaled nitric oxide fraction (FENO) values and could hamper how FENO captures changes in asthma control. Here, our objective was to assess whether forced expiratory volume in 1 s (FEV1) variations alter the ability of FENO to reflect asthma control.FENO, asthma control (Asthma Control Questionnaire (ACQ)) and FEV1 were measured at least two times in 527 patients during 1819 pairs of visits. Determinants of FENO-ACQ discordance probability were evaluated through a logistic regression analysis...
August 2017: European Respiratory Journal: Official Journal of the European Society for Clinical Respiratory Physiology
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
#14
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/28801088/characteristics-of-severe-asthma-with-fungal-sensitization
#15
Katsunori Masaki, Koichi Fukunaga, Masako Matsusaka, Hiroki Kabata, Takae Tanosaki, Takao Mochimaru, Takashi Kamatani, Kengo Ohtsuka, Rie Baba, Soichiro Ueda, Yusuke Suzuki, Fumio Sakamaki, Yoshitaka Oyamada, Takashi Inoue, Tsuyoshi Oguma, Koichi Sayama, Hidefumi Koh, Morio Nakamura, Akira Umeda, Katsuhiko Kamei, Kenji Izuhara, Koichiro Asano, Tomoko Betsuyaku
BACKGROUND: Some patients with severe asthma also have fungal sensitization and are considered to have severe asthma with fungal sensitization. However, there is limited information on the clinical features of SAFS. OBJECTIVE: To investigate the clinical characteristics of severe asthma with fungal sensitization. METHODS: The present study enrolled 124 patients with severe asthma. We evaluated clinical aspects, such as various serum cytokines, fractional exhaled nitric oxide, pulmonary function, and serum immunoglobulin E (IgE)...
September 2017: Annals of Allergy, Asthma & Immunology
https://www.readbyqxmd.com/read/28797075/arginine-metabolic-endotypes-related-to-asthma-severity
#16
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/28774947/bayesian-estimation-of-physiological-parameters-governing-a-dynamic-two-compartment-model-of-exhaled-nitric-oxide
#17
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
#18
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
#19
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
#20
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
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