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Exhaled nitric oxide

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https://www.readbyqxmd.com/read/28209039/-the-value-of-fractionated-exhaled-nitric-oxide-in-the-diagnosis-of-asthma-chronic-obstructive-pulmonary-disease-overlap-syndrome
#1
D D Deng, A Y Zhou, Q C Shuang, P Chen
Objective: To explore the diagnostic value of fractionated exhaled nitric oxide (FeNO) measurement in patients with asthma-chronic obstructive pulmonary disease(COPD) overlap syndrome (ACOS). Methods: Eighty-one patients with ACOS, 76 patients with asthma, 82 patients with COPD and 39 healthy non-smoking subjects were recruited in the study. Naku Lun breath analyzer was used to measure the level of FeNO in the 4 groups. Pulmonary function was also measured. The ROC curve was used to differentiate ACOS from patients with COPD...
February 12, 2017: Chinese Journal of Tuberculosis and Respiratory Diseases
https://www.readbyqxmd.com/read/28208871/clinical-utility-of-fractional-exhaled-nitric-oxide-feno-as-a-biomarker-to-predict-severity-of-disease-and-response-to-inhaled-corticosteroid-ics-in-asthma-patients
#2
Revathy Neelamegan, Vinodkumar Saka, Kadhiravan Tamilarasu, Manju Rajaram, Sandhiya Selvarajan, Adithan Chandrasekaran
INTRODUCTION: Bronchial asthma is a common chronic inflammatory airway disease diagnosed and is based on symptomatic history and Pulmonary Function Tests (PFT). Fractional exhaled Nitric Oxide (FeNO) is exclusively a non-invasive biomarker of on-going eosinophilic airway inflammation which remains unpredictable only with PFTs. FeNO measurement is recommended in predicting asthma severity and Inhaled Corticosteroid (ICS) response but further research is required to understand its clinical utility and agreement with current recommendations in a specific population...
December 2016: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28208225/indoor-fungal-diversity-in-primary-schools-may-differently-influence-allergic-sensitization-and-asthma-in-children
#3
João Cavaleiro Rufo, Joana Madureira, Inês Paciência, Lívia Aguiar, Cristiana Pereira, Diana Silva, Patrícia Padrão, Pedro Moreira, Luís Delgado, Isabella Annesi-Maesano, Eduardo Oliveira Fernandes, João Paulo Teixeira, André Moreira
BACKGROUND: Childhood exposure to microbiological agents may influence the development of allergic and respiratory diseases. Apart from home, children spend most of their time at school, which represents an environment of significant exposure to indoor air microbes. Therefore, we aimed to assess how the prevalence of allergic sensitization and asthma in schoolchildren is affected by microbiological exposure within classrooms. METHODS: Spirometry with bronchodilation, exhaled nitric oxide measurements and skin-prick tests data were retrieved from 858 children aged 8 to 10 years old attending 71 classrooms in 20 primary schools...
February 16, 2017: Pediatric Allergy and Immunology
https://www.readbyqxmd.com/read/28195657/pulmonary-function-and-airway-inflammation-among-dairy-parlor-workers-after-exposure-to-inhalable-aerosols
#4
Matthew W Nonnenmann, David Gimeno Ruiz de Porras, Jeffrey Levin, David Douphrate, Vijay Boggaram, Joshua Schaffer, Michael Gallagher, Madeleine Hornick, Stephen Reynolds
BACKGROUND: Inhalation exposure to organic dust causes lung inflammation among agricultural workers. Due to changes in production and work organization, task-based inhalation exposure data, including novel lung inflammation biomarkers, will inform exposure recommendations for dairy farm workers. METHODS: Linear regression was used to estimate the associations of airborne exposure to dust concentration, endotoxin, and muramic acid with pulmonary outcomes (i.e., FEV1 , exhaled nitric oxide)...
March 2017: American Journal of Industrial Medicine
https://www.readbyqxmd.com/read/28182502/effect-of-dietary-nitrate-supplementation-on-swimming-performance-in-trained-swimmers
#5
Sam Lowings, Oliver Michael Shannon, Kevin Deighton, Jamie Matu, Matthew John Barlow
Nitrate supplementation appears to be most ergogenic when oxygen availability is restricted and subsequently may be particularly beneficial for swimming performance due to the breath-hold element of this sport. This represents the first investigation of nitrate supplementation and swimming time-trial (TT) performance. In a randomised double-blind repeated-measures crossover study, ten (5male, 5female) trained swimmers ingested 140ml nitrate-rich (~12.5mmol nitrate) or nitrate-depleted (~0.01mmol nitrate) beetroot juice...
February 9, 2017: International Journal of Sport Nutrition and Exercise Metabolism
https://www.readbyqxmd.com/read/28179442/t-helper-cell-type-2-th2-and-non-th2-molecular-phenotypes-of-asthma-using-sputum-transcriptomics-in-u-biopred
#6
Chih-Hsi Scott Kuo, Stelios Pavlidis, Matthew Loza, Fred Baribaud, Anthony Rowe, Iaonnis Pandis, Ana Sousa, Julie Corfield, Ratko Djukanovic, Rene Lutter, Peter J Sterk, Charles Auffray, Yike Guo, Ian M Adcock, Kian Fan Chung
Asthma is characterised by heterogeneous clinical phenotypes. Our objective was to determine molecular phenotypes of asthma by analysing sputum cell transcriptomics from 104 moderate-to-severe asthmatic subjects and 16 nonasthmatic subjects.After filtering on the differentially expressed genes between eosinophil- and noneosinophil-associated sputum inflammation, we used unbiased hierarchical clustering on 508 differentially expressed genes and gene set variation analysis of specific gene sets.We defined three transcriptome-associated clusters (TACs): TAC1 (characterised by immune receptors IL33R, CCR3 and TSLPR), TAC2 (characterised by interferon-, tumour necrosis factor-α- and inflammasome-associated genes) and TAC3 (characterised by genes of metabolic pathways, ubiquitination and mitochondrial function)...
February 2017: European Respiratory Journal: Official Journal of the European Society for Clinical Respiratory Physiology
https://www.readbyqxmd.com/read/28159392/arsenic-exposure-alters-lung-function-and-airway-inflammation-in-children-a-cohort-study-in-rural-bangladesh
#7
Sultan Ahmed, Evana Akhtar, Adity Roy, Ondine S von Ehrenstein, Marie Vahter, Yukiko Wagatsuma, Rubhana Raqib
Exposure to arsenic has been associated with increased risk of reduced lung function in adults, but the adverse impacts in early life are unclear. We aim to examine whether prenatal and childhood arsenic exposure is associated with reduced lung function and increased airway inflammation in school-aged children. Children born in the MINIMat cohort in rural Bangladesh were evaluated at 9years of age (n=540). Arsenic exposure was assessed in urine (U-As) that was collected from mothers during early pregnancy and their children aged 4...
February 1, 2017: Environment International
https://www.readbyqxmd.com/read/28151459/effect-of-nigella-sativa-supplementation-on-lung-function-and-inflammatory-mediatorsin-partly-controlled-asthma-a-randomized-controlled-trial
#8
Ayad Mohammed Salem, Abdullah Omar Bamosa, Hatem Othman Qutub, Rakesh Kumar Gupta, Ahmed Badar, Abdelsalam Elnour, Muhammad Nasir Afzal
BACKGROUND: Nigella sativa and its derivatives have been reported to have anti-inflammatory and bronchodilator effects, but the effects have been evaluated in only a few clinical studies. OBJECTIVES: To determine the effect of N sativa supplementation on inflammation of the airways and limitation of airflow in partly controlled asthma patients. DESIGN: Single-blind, placebo-controlled, randomized study. SETTING: Asthma and allergy clinic of a university hospital in eastern Saudi Arabia...
January 2017: Annals of Saudi Medicine
https://www.readbyqxmd.com/read/28145647/relationship-between-fractional-exhaled-nitric-oxide-level-and-efficacy-of-inhaled-corticosteroid-in-asthma-copd-overlap-syndrome-patients-with-different-disease-severity
#9
Jia Xi Feng, Yun Lin, Jian Lin, Su Su He, Mei Fang Chen, Xiao Mai Wu, You Zu Xu
This study explored the relationship between the fractional exhaled nitric oxide (FeNO) level and the efficacy of inhaled corticosteroid (ICS) in asthma-chronic obstructive pulmonary disease (COPD) overlap syndrome (ACOS) patients with different disease severity. A total of 127 ACOS patients with ACOS (case group) and 131 healthy people (control group) were enrolled in this study. Based on the severity of COPD, the ACOS patients were divided into: mild ACOS; moderate ACOS; severe ACOS; and extremely severe ACOS groups...
March 2017: Journal of Korean Medical Science
https://www.readbyqxmd.com/read/28137494/characteristics-associated-with-clinical-severity-and-inflammatory-phenotype-of-naturally-occurring-virus-induced-exacerbations-of-asthma-in-adults
#10
Asger Bjerregaard, Ingrid A Laing, Nadia Poulsen, Vibeke Backer, Asger Sverrild, Markus Fally, Siew-Kim Khoo, Lucy Barrett, Svetlana Baltic, Philip J Thompson, Glenys Chidlow, Chisha Sikazwe, David W Smith, Yury A Bochkov, Peter Le Souëf, Celeste Porsbjerg
BACKGROUND: In experimental studies viral infections have been shown to induce type 2 inflammation in asthmatics, but whether this is a feature of naturally occurring virus-induced asthma exacerbations is unknown. Thymic stromal lymphopoietin (TSLP) released from the airway epithelium in response to damage, has been suggested as a link between viral infection and type 2 inflammation, but the role of TSLP in asthma exacerbations is unknown. OBJECTIVE: To assess whether type 2 inflammation, as measured by sputum eosinophils and fractional exhaled nitric oxide (FeNO), is a feature of naturally occurring virus-induced exacerbations of asthma and whether TSLP is associated with this type 2 inflammation...
February 2017: Respiratory Medicine
https://www.readbyqxmd.com/read/28135110/the-influence-of-17-hours-of-normobaric-hypoxia-on-parallel-adjustments-in-exhaled-nitric-oxide-and-airway-function-in-lowland-healthy-adults
#11
Erik H Van Iterson, Eric M Snyder, Bruce D Johnson
Van Iterson, Erik H., Eric M. Snyder, and Bruce D. Johnson. The influence of 17 hours of normobaric hypoxia on parallel adjustments in exhaled nitric oxide and airway function in lowland healthy adults. High Alt Med Biol. 16:000-000, 2017.-Currently, there is a disparate understanding of the role that normobaric hypoxia plays in affecting nitric oxide (NO) measured in exhaled air (eNO) and airway function in lowland healthy adults. Compared to normobaric normoxia, this study aimed to test the effect of 17 hours of normobaric hypoxia on relationships between eNO and airway function in healthy adults...
January 30, 2017: High Altitude Medicine & Biology
https://www.readbyqxmd.com/read/28134501/the-current-and-future-role-of-biomarkers-in-type-2-cytokine-mediated-asthma-management
#12
REVIEW
I D Pavord, S Afzalnia, A Menzies-Gow, L G Heaney
Assessment and management of asthma is complicated by the heterogeneous pathophysiological mechanisms that underlie its clinical presentation, which are not necessarily reflected in standardized management paradigms and which necessitate an individualized approach to treatment. This is particularly important with the emerging availability of a variety of targeted forms of therapy that may only be appropriate for use in particular patient subgroups. The identification of biomarkers can potentially aid diagnosis and inform prognosis, help guide treatment decisions and allow clinicians to predict and monitor response to treatment...
February 2017: Clinical and Experimental Allergy: Journal of the British Society for Allergy and Clinical Immunology
https://www.readbyqxmd.com/read/28126433/two-inflammatory-phenotypes-of-nasal-polyps-and-comorbid-asthma
#13
Dawei Wu, Lun Li, Min Zhang, Jianting Wang, Yongxiang Wei
BACKGROUND: Nasal polyps and comorbid asthma (NPCA) is a common united airway disease. However, the inflammatory phenotyes of NPCA are not clear. OBJECTIVE: To identify inflammatory phenotypes of NPCA. METHODS: A total of 106 patients diagnosed with NPCA were recruited from rhinologic clinics. A combined method of biopsies from nasal polyps and fractional exhaled nitric oxide (FeNO) was used to explore inflammatory phenotyes of NPCA. Patients were evaluated with respect to clinical, functional, and inflammatory parameters...
January 23, 2017: Annals of Allergy, Asthma & Immunology
https://www.readbyqxmd.com/read/28126431/sex-differences-in-asthma-in-swimmers-and-tennis-players
#14
Kerstin Romberg, Ellen Tufvesson, Leif Bjermer
BACKGROUND: Elite athletes, independent of sport, have increased risk of developing asthma, but little is known about sex difference among adolescent athletes. OBJECTIVE: To investigate and compare sex-related differences according to symptoms and treatment of asthma, allergy, and health among elite athletes and a reference group. METHODS: Adolescent elite swimmers (n = 101), tennis players (n = 86), and a reference group (n = 1,628) responded to a questionnaire about respiratory symptoms, allergy, health behavior, psychosomatic symptoms, self- esteem, and well-being...
January 23, 2017: Annals of Allergy, Asthma & Immunology
https://www.readbyqxmd.com/read/28121185/does-chronic-physical-activity-level-modify-the-airway-inflammatory-response-to-an-acute-bout-of-exercise-in-the-postprandial-period
#15
RANDOMIZED CONTROLLED TRIAL
Stephanie P Kurti, Sara K Rosenkranz, Stephen K Chapes, Colby S Teeman, Brooke J Cull, Sam R Emerson, Morton H Levitt, Joshua R Smith, Craig A Harms
Recent studies have confirmed that a single high-fat meal (HFM) leads to increased airway inflammation. However, exercise is a natural anti-inflammatory and may modify postprandial airway inflammation. The postprandial airway inflammatory response is likely to be modified by chronic physical activity (PA) level. This study investigated whether chronic PA modifies the airway inflammatory response to an acute bout of exercise in the postprandial period in both insufficiently active and active subjects. Thirty-nine nonasthmatic subjects (20 active, 13 males/7 females) who exceeded PA guidelines (≥150 min moderate-vigorous PA/week) and 19 insufficiently active (6 males/13 females) underwent an incremental treadmill test to exhaustion to determine peak oxygen uptake...
February 2017: Applied Physiology, Nutrition, and Metabolism, Physiologie Appliquée, Nutrition et Métabolisme
https://www.readbyqxmd.com/read/28117692/novel-isoprene-sensor-for-a-flu-virus-breath-monitor
#16
Pelagia-Irene Gouma, Lisheng Wang, Sanford R Simon, Milutin Stanacevic
A common feature of the inflammatory response in patients who have actually contracted influenza is the generation of a number of volatile products of the alveolar and airway epithelium. These products include a number of volatile organic compounds (VOCs) and nitric oxide (NO). These may be used as biomarkers to detect the disease. A portable 3-sensor array microsystem-based tool that can potentially detect flu infection biomarkers is described here. Whether used in connection with in-vitro cell culture studies or as a single exhale breathalyzer, this device may be used to provide a rapid and non-invasive screening method for flu and other virus-based epidemics...
January 20, 2017: Sensors
https://www.readbyqxmd.com/read/28114141/lung-function-in-women-with-idiopathic-central-precocious-puberty-a-pilot-study%C3%A2
#17
Virginia Murri, Franco Antoniazzi, Michele Piazza, Paolo Cavarzere, Claudia Banzato, Attilio Boner, Rossella Gaudino
BACKGROUND: Studies have reported that women with early menarche (≤10 years) have lower lung function. AIM: To investigate lung function in women with a history of idio pathic central precocious puberty (ICPP) treated during childhood with gonadotropin-releasing hormone agonist (GnRHa). METHODS: ICPP women (n = 23) were compared with healthy age-matched controls (n = 23). Subjects were clinically evaluated by means of a questionnaire, baseline and post-β<Sub>2</Sub> agonist spirometry, impulse oscillometry (a measure of airway resistance), and measurement of fractional exhaled nitric oxide (FeNO)...
January 23, 2017: Hormone Research in Pædiatrics
https://www.readbyqxmd.com/read/28109725/6q12-and-11p14-variants-are-associated-with-postnatal-exhaled-nitric-oxide-and-respiratory-symptoms
#18
Oliver Fuchs, Olga Gorlanova, Philipp Latzin, Anne Schmidt, Maximilian Schieck, Antoaneta A Toncheva, Sven Michel, Vincent D Gaertner, Michael Kabesch, Urs Frey
BACKGROUND: Exhaled nitric oxide (eNO) is a biomarker of airway inflammation and seems to precede respiratory symptoms, such as asthma in childhood. Identifying genetic determinants of postnatal eNO may aid in unraveling the role of eNO in epithelial function or airway inflammation and disease. OBJECTIVE: To identify genetic determinants of early postnatal eNO and subsequent respiratory symptoms during the first year of life. METHODS: Within a population-based birth cohort, eNO was measured in healthy term infants aged 5 weeks during quiet tidal breathing in unsedated sleep...
January 18, 2017: Journal of Allergy and Clinical Immunology
https://www.readbyqxmd.com/read/28105134/increased-circulating-il-9-producing-cd8-t-cells-are-associated-with-eosinophilia-and-high-feno-in-allergic-asthmatics
#19
Wei Wang, Zhen-Shun Cheng, Yi-Fei Chen, Yu-Hui Lin
Allergic asthma is a chronic airway disorder mediated by Th2 cells. It has been shown that IL-9-producing CD8(+) cytotoxic T (Tc9) cells promote the subsequent onset of allergic airway inflammation in mice mediated by abnormal Th2 immunity. Whether Tc9 cells are associated with the immunopathogenesis of asthmatic patients remains unknown. In the present study, peripheral blood mononuclear cells (PBMCs) were separated by Ficoll-Hypaque gradient centrifugation from all subjects. The frequency of Tc9 cells was measured by flow cytometry...
December 2016: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/28104897/optimal-flow-rate-sampling-designs-for-studies-with-extended-exhaled-nitric-oxide-analysis
#20
Noa Molshatzki, Sandrah Eckel
INTRODUCTION: The fractional concentration of exhaled nitric oxide (FeNO) is a biomarker of airway inflammation. Repeat FeNO maneuvers at multiple fixed exhalation flow rates (extended NO analysis) can be used to estimate parameters quantifying proximal and distal sources of NO in mathematical models of lower respiratory tract NO. A growing number of studies use extended NO analysis, but there is no official standard flow rate sampling protocol. In this paper, we provide information for study planning by deriving theoretically optimal flow rate sampling designs...
January 20, 2017: Journal of Breath Research
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