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Exhaled nitric oxide

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https://www.readbyqxmd.com/read/28092287/current-and-future-management-of-the-young-child-with-early-onset-wheezing
#1
Allison J Burbank, Stanley J Szefler
PURPOSE OF REVIEW: In this review, we discuss current thinking in relation to available guidelines for the care of preschool-aged children with recurrent wheezing, while highlighting the gaps in our knowledge and discussing changes that could occur over the next 5 years. RECENT FINDINGS: The Asthma Predictive Index as well as allergen-specific IgE, peripheral eosinophil count and exhaled nitric oxide are perhaps underutilized sources of information that can assist in predicting progression to asthma and response to therapies...
January 13, 2017: Current Opinion in Allergy and Clinical Immunology
https://www.readbyqxmd.com/read/28090297/exhaled-nitric-oxide-in-pulmonary-arterial-hypertension-associated-with-systemic-sclerosis
#2
Zeling Cao, Stephen C Mathai, Laura K Hummers, Ami A Shah, Fredrick M Wigley, Noah Lechtzin, Paul M Hassoun, Reda E Girgis
The fractional exhaled concentration of nitric oxide (FENO) has been shown to be reduced in idiopathic pulmonary arterial hypertension (PAH) but has not been adequately studied in PAH associated with systemic sclerosis (SSc). We measured FENO at an expiratory flow rate of 50 mL/s in 21 treatment-naive patients with SSc-associated PAH (SSc-PAH), 94 subjects with SSc without pulmonary involvement, and 84 healthy volunteers. Measurements of FENO at additional flow rates of 100, 150, and 250 mL/s were obtained to derive the flow-independent nitric oxide exchange parameters of maximal airway flux (J'awNO) and steady-state alveolar concentration (CANO)...
December 2016: Pulmonary Circulation
https://www.readbyqxmd.com/read/28090286/novel-methods-in-pulmonary-hypertension-phenotyping-in-the-age-of-precision-medicine-2015-grover-conference-series
#3
REVIEW
Jarrod W Barnes, Adriano R Tonelli, Gustavo A Heresi, Jennie E Newman, Noël E Mellor, David E Grove, Raed A Dweik
Among pulmonary vascular diseases, pulmonary hypertension (PH) is the best studied and has been the focus of our work. The current classification of PH is based on a relatively simple combination of patient characteristics and hemodynamics. This leads to inherent limitations, including the inability to customize treatment and the lack of clarity from a more granular identification based on individual patient phenotypes. Accurate phenotyping of PH can be used in the clinic to select therapies and determine prognosis and in research to increase the homogeneity of study cohorts...
December 2016: Pulmonary Circulation
https://www.readbyqxmd.com/read/28089872/identification-of-airway-mucosal-type-2-inflammation-by-clinical-biomarkers-in-asthma
#4
Philip E Silkoff, Michel Laviolette, Dave Singh, J Mark FitzGerald, Steven Kelsen, Vibeke Backer, Celeste M Porsbjerg, Pierre-Olivier Girodet, Patrick Berger, Joel N Kline, Geoffrey Chupp, Vedrana S Susulic, Elliot S Barnathan, Frédéric Baribaud, Matthew J Loza
BACKGROUND AND OBJECTIVE: The Airways Disease Endotyping for Personalized Therapeutics (ADEPT) study profiled mild, moderate and severe asthma, and non-atopic healthy controls. We explored this dataset to define Type-2 inflammation based on airway-mucosal IL-13-driven gene expression and how this related to clinically-accessible biomarkers. METHODS: IL-13-driven gene expression was evaluated in several human cell lines. We then defined Type-2 status in 25 healthy subjects, 28 mild, 29 moderate, and 26 severe asthmatics, based on airway-mucosal expression of 1) CC-motif chemokine ligand (CCL)-26, (the most differentially expressed gene), 2) periostin, or 3) a multi-gene IL-13 in-vitro signature (IVS)...
January 12, 2017: Journal of Allergy and Clinical Immunology
https://www.readbyqxmd.com/read/28088474/diagnostic-accuracy-of-fractional-exhaled-nitric-oxide-in-predicting-cough-variant-asthma-and-eosinophilic-bronchitis-in-adult-patients-with-chronic-cough-a-systematic-review-and-meta-analysis
#5
Woo-Jung Song, Hyun Jung Kim, Ji-Su Shim, Ha-Kyeong Won, Sung-Yoon Kang, Kyoung-Hee Sohn, Byung-Keun Kim, Eun-Jung Jo, Min-Hye Kim, Sang-Heon Kim, Heung-Woo Park, Sun-Sin Kim, Yoon-Seok Chang, Alyn H Morice, Byung-Jae Lee, Sang-Heon Cho
BACKGROUND: Individual studies suggested the utility of fractional exhaled nitric oxide (FeNO) in detecting cough variant asthma (CVA) and eosinophilic bronchitis (EB) in chronic cough patients. OBJECTIVE: To obtain summary estimates of diagnostic test accuracy of FeNO in predicting CVA and/or EB in adult patients with chronic cough METHODS: Electronic databases were searched for studies published until January 2016, without language restriction. Cross-sectional studies which reported the diagnostic accuracy of FeNO for detecting CVA or EB were included...
January 11, 2017: Journal of Allergy and Clinical Immunology
https://www.readbyqxmd.com/read/28076986/utilising-exhaled-nitric-oxide-information-to-enhance-diagnosis-and-therapy-of-respiratory-disease-current-evidence-for-clinical-practice-and-proposals-to-improve-the-methodology
#6
Marieann Högman, Lauri Lehtimäki, Anh Tuan Dinh-Xuan
A non-invasive tool to diagnose respiratory diseases and to follow treatment has long been looked-for. Exhaled nitric oxide (NO) is a promising marker of inflammation in asthma but nearly 25-years of research has shown that it works in only certain endotypes of asthma. The modelling of NO dynamics of the lung can give more information than a single FENO value. Areas covered: The estimation of the NO production in the conducting airways and in the gas exchange area has given new insight of the NO production in diseases beyond asthma...
January 11, 2017: Expert Review of Respiratory Medicine
https://www.readbyqxmd.com/read/28075383/soluble-fibre-meal-challenge-reduces-airway-inflammation-and-expression-of-gpr43-and-gpr41-in-asthma
#7
Isabel Halnes, Katherine J Baines, Bronwyn S Berthon, Lesley K MacDonald-Wicks, Peter G Gibson, Lisa G Wood
Short chain fatty acids (SCFAs) are produced following the fermentation of soluble fibre by gut bacteria. In animal models, both dietary fibre and SCFAs have demonstrated anti-inflammatory effects via the activation of free fatty acid receptors, such as G protein-coupled receptor 41 and 43 (GPR41 and GPR43). This pilot study examined the acute effect of a single dose of soluble fibre on airway inflammation-including changes in gene expression of free fatty acid receptors-in asthma. Adults with stable asthma consumed a soluble fibre meal (n = 17) containing 3...
January 10, 2017: Nutrients
https://www.readbyqxmd.com/read/28065396/inhaled-corticosteroid-dose-response-in-asthma-should-we-measure-inflammation
#8
William J Anderson, Philip M Short, Sunny Jabbal, Brian J Lipworth
BACKGROUND: Inhaled corticosteroid (ICS) titration in asthma is primarily based on symptoms and pulmonary function. ICSs may not be increased on this basis despite residual airway inflammation. OBJECTIVE: To compare the dose-response relationships of ICSs on measures of pulmonary function, symptoms, and inflammation in patients with persistent asthma. METHODS: We performed a pooled post hoc analysis of 121 patients with mild to moderate asthma from 4 randomized clinical trials that incorporated an ICS dose ramp...
January 3, 2017: Annals of Allergy, Asthma & Immunology
https://www.readbyqxmd.com/read/28055271/airway-hyperresponsiveness-to-mannitol-and-methacholine-and-exhaled-nitric-oxide-in-children-with-asthma
#9
Young A Park, Hyun Bin Park, Yoon Hee Kim, In Sook Sul, Seo Hee Yoon, Hye Ran Kim, Kyung Won Kim, Kyu-Earn Kim, Myung Hyun Sohn
No abstract text is available yet for this article.
January 5, 2017: Journal of Asthma: Official Journal of the Association for the Care of Asthma
https://www.readbyqxmd.com/read/28051241/effects-of-omalizumab-therapy-on-allergic-rhinitis-a-pilot-study
#10
S Masieri, C Cavaliere, E Begvarfaj, D Rosati, A Minni
OBJECTIVE: The use of omalizumab, a humanized monoclonal antibody able to binding Ig-E, is currently authorized only for treatment of severe bronchial asthma. The use of omalizumab in other Ig-E related diseases is off-label, although some studies have provided promising results about it. The aim of this study was to evaluate if therapy with omalizumab in patients affected by asthma and allergic rhinitis has an impact also on allergic rhinitis-related symptoms. PATIENTS AND METHODS: A longitudinal study was conducted on 11 patients affected by severe asthma and a periodic allergic rhinitis...
December 2016: European Review for Medical and Pharmacological Sciences
https://www.readbyqxmd.com/read/28042058/eosinophilic-airway-inflammation-in-asthma-is-associated-with-an-altered-airway-microbiome
#11
Asger Sverrild, Pia Kiilerich, Asker Brejnrod, Rebecca Pedersen, Celeste Porsbjerg, Anders Bergqvist, Jonas S Erjefält, Karsten Kristiansen, Vibeke Backer
BACKGROUND: Subjects with asthma have higher microbiome diversity, and an altered composition with more Proteobacteria and less Bacteroidetes compared to healthy controls. Studies comparing airway inflammation and airway microbiome are sparse, especially in subjects not on anti-inflammatory treatment. OBJECTIVE: To describe the relationship between the airway microbiome and patterns of airway inflammation in steroid-free subjects with asthma and healthy controls...
December 29, 2016: Journal of Allergy and Clinical Immunology
https://www.readbyqxmd.com/read/28038794/prognostic-role-of-exhaled-breath-condensate-ph-and-fraction-exhaled-nitric-oxide-in-systemic-sclerosis-related-interstitial-lung-disease
#12
Alfredo Guillen-Del Castillo, Sara Sánchez-Vidaurre, Carmen P Simeón-Aznar, María J Cruz, Vicente Fonollosa-Pla, Xavier Muñoz
INTRODUCTION: Interstitial lung disease (ILD) is one of the major causes of death in systemic sclerosis (SSc). This study investigated exhaled breath (EB) and exhaled breath condensate (EBC) biomarkers in patients with SSc and analyzed their role as a prognostic tool in SSc-related ILD. METHODS: Fraction exhaled nitric oxide (FeNO) and exhaled carbon monoxide (eCO) measured in EB, together with pH, nitrite, nitrate and interleukin-6 levels measured in EBC were prospectively analyzed in 35 patients with SSc...
December 27, 2016: Archivos de Bronconeumología
https://www.readbyqxmd.com/read/28036144/revisiting-type-2-high-and-type-2-low-airway-inflammation-in-asthma-current-knowledge-and-therapeutic-implications
#13
Douglas Robinson, Marc Humbert, Roland Buhl, Alvaro A Cruz, Hiromasa Inoue, Stephan Korom, Nicola A Hanania, Parameswaran Nair
Asthma is a complex respiratory disorder characterized by marked heterogeneity in individual patient disease triggers and response to therapy. Several asthma phenotypes have now been identified, each defined by a unique interaction between genetic and environmental factors, including inflammatory, clinical and trigger-related phenotypes. Endotypes further describe the functional or pathophysiologic mechanisms underlying the patient's disease. Type 2-driven asthma is an emerging nomenclature for a common subtype of asthma and is characterized by the release of signature cytokines IL-4, IL-5 and IL-13 from cells of both the innate and adaptive immune systems...
December 30, 2016: Clinical and Experimental Allergy: Journal of the British Society for Allergy and Clinical Immunology
https://www.readbyqxmd.com/read/28029801/sinus-computed-tomographic-findings-in-adult-smoking-and-non-smoking-asthmatics-analysis-of-clinical-indices-and-biomarkers
#14
Hirokazu Kimura, Satoshi Konno, Yuji Nakamaru, Hironi Makita, Natsuko Taniguchi, Kaoruko Shimizu, Masaru Suzuki, Junya Ono, Shoichiro Ohta, Kenji Izuhara, Masaharu Nishimura
RATIONALE: When the two conditions occur together, sinusitis and asthma are often thought to represent anatomically separate components of the same chronic inflammatory airway disease. Information about the effect of smoking on the interaction between sinusitis and asthma in patients who have both disorders is limited. OBJECTIVES: This study aimed to evaluate the effect of cigarette smoking on the relationship between the presence and severity of sinusitis and selected asthma-related indices in adults who have asthma...
December 28, 2016: Annals of the American Thoracic Society
https://www.readbyqxmd.com/read/28017448/25-hydroxyvitamin-d-concentrations-asthma-and-eczema-in-childhood-the-generation-r-study
#15
Ilse I M Tromp, Oscar H Franco, Edith H van den Hooven, Annemieke C Heijboer, Vincent W V Jaddoe, Liesbeth Duijts, Johan C de Jongste, Henriëtte A Moll, Jessica C Kiefte-de Jong
BACKGROUND & AIMS: A role of vitamin D in the development of respiratory and allergic disease in children remains unclear. It may be likely that vitamin D has an effect on airway inflammation, but only few studies examined the effect in children. We aimed to examine whether serum 25-hydroxyvitamin D (25(OH) vitamin D) concentrations are associated with the fraction of exhaled nitric oxide (FeNO), airway interrupter resistance (Rint), physician diagnosed asthma ever, wheezing and eczema in a population-based cohort study in 6 year old children...
December 8, 2016: Clinical Nutrition: Official Journal of the European Society of Parenteral and Enteral Nutrition
https://www.readbyqxmd.com/read/27996290/determination-of-fractional-exhaled-nitric-oxide-feno-reference-values-in-healthy-thai-population
#16
Yiwa Suksawat, Punchama Pacharn, Orathai Jirapongsananuruk
BACKGROUND: Fractional exhaled nitric oxide (FENO) level is directly correlated with airway inflammation in asthma patients. The objective of this study was to define normal FENO levels in healthy Thai volunteers. METHODS: This prospective cohort study was conducted in healthy Thai volunteers aged ≥5 years. Demographic and clinical data were recorded and pulmonary function test (PFT) was performed. FENO was measured using a chemiluminescence nitric oxide analyzer...
December 12, 2016: Asian Pacific Journal of Allergy and Immunology
https://www.readbyqxmd.com/read/27996287/association-of-indoor-air-quality-and-preschool-children-s-respiratory-symptoms
#17
Pongtong Puranitee, Sirinapa Siwarom, Adisak Plitponkarnpim, Wiparat Manuyakorn, Ratchaneewan Sinitkul, Sakda Arj-Ong Vallipakorn
BACKGROUND: This study aimed to assess the association between exposure to indoor air pollution in DCCs (Child Day Care Centers) and the respiratory symptoms of children under 6 years old. METHODS: Air quality data were collected three times regarding seasonal variation. Pollutants measured in 11 DCCs included PM10, CO, NO2, SO2, O3, benzene, bacteria, fungi, and dust mite. The frequency of respiratory symptoms including coughing, rhinitis, and dyspnea were recorded via teacher and parent-report questionnaires...
December 12, 2016: Asian Pacific Journal of Allergy and Immunology
https://www.readbyqxmd.com/read/27973944/a-population-based-study-of-smoking-serum-cotinine-and-exhaled-nitric-oxide-among-asthmatics-and-a-healthy-population-in-the-usa
#18
Xiaohui Xu, Hui Hu, Gregory D Kearney, Haidong Kan, Genny Carrillo, Xinguang Chen
BACKGROUND: Fractional concentration of exhaled nitric oxide (FeNO) is recommended by the American Thoracic Society (ATS) as a noninvasive biomarker of airway inflammation. In addition to inflammation, many factors may be associated with FeNO, particularly tobacco exposure; however, only age has been included as an influential factor for children below 12 years. Numerous studies have demonstrated negative associations between tobacco exposure and FeNO levels with self-reported data, but few with an objective assessment of smoking...
December 2016: Inhalation Toxicology
https://www.readbyqxmd.com/read/27942431/biomarkers-for-the-phenotyping-and-monitoring-of-asthma-in-children
#19
REVIEW
Anna James, Gunilla Hedlin
An important issue in relation to the utility and reliability of biomarkers for asthma monitoring is how asthma is defined and characterized. What kind of asthma, or at what stage of the disease is a particular biomarker supposed to add information? Often, the purpose, or usefulness of a biomarker is not made clear. Diagnosis, severity evaluation, and monitoring are all different clinical uses for a biomarker, and confusion may arise when a biomarker is suitable for one of these but not another. When the utility of available biomarkers are discussed, these different roles need to be clarified...
2016: Current Treatment Options in Allergy
https://www.readbyqxmd.com/read/27938540/-protective-effect-of-hydrogen-on-the-lung-of-sanitation-workers-exposed-to-haze
#20
Z J Gong, J T Guan, X Z Ren, D Y Meng, H R Zhang, B L Wang, X X Yan
Objective: To study the protective effect of hydrogen inhalation on the lungs of sanitation workers exposed to haze. Methods: In this randomized, double-blind, placebo controlled clinical trial, 96 sanitation workers living in Shijiazhuang urban area were recruited during January to February, 2016. All enrolled participants were randomized to 2 groups; the treatment group inhaled H2∶O2 mixture (66.67%∶33.33%) 1 hour per day for 30 days, while the control group inhaled N2∶O2 mixture (66.67%∶33.33%) 1 hour per day for 30 days...
December 12, 2016: Chinese Journal of Tuberculosis and Respiratory Diseases
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