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Fractionated exhaled nitric oxide

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https://www.readbyqxmd.com/read/28332897/characteristics-of-non-smoking-adult-asthma-patients-with-chronic-airflow-limitation
#1
TunnRen Tay, Xuening Choo, Rosna Ihsan, Hsiao Peng Toh, Hang Siang Wong, Augustine Tee
OBJECTIVE: Chronic airflow limitation (CAL) can develop in a subgroup of patients with asthma. Characterising these patients is important because reduced lung function is a risk factor for adverse asthma outcomes. We hypothesised that heterogeneity in patients with CAL may be influenced by age at asthma onset. We first compared never-smoking asthma patients with and without CAL, and subsequently examined the differences between patients with late and early-onset asthma within the CAL cohort...
March 23, 2017: Journal of Asthma: Official Journal of the Association for the Care of Asthma
https://www.readbyqxmd.com/read/28328850/measurement-of-exhaled-nitric-oxide-concentration-in-patients-with-obstructive-sleep-apnea-a-meta-analysis
#2
Dongmei Zhang, Jinmei Luo, Yixian Qiao, Yi Xiao, Rong Huang, Xu Zhong
BACKGROUND: Exhaled nitric oxide (eNO) has been proposed as a noninvasive measure of airway inflammation. However, its value in patients with obstructive sleep apnea (OSA) is still controversial. The authors aim to assess the difference in eNO levels between patients with OSA and controls by a meta-analysis. METHODS: A systematic search was performed in the PubMed, EMBASE, the Cochrane Library, and MEDLINE databases to collect relevant studies published from 1996 to 2016...
March 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28318886/airway-inflammation-phenotype-prediction-in-asthma-patients-using-lung-sound-analysis-with-fractional-exhaled-nitric-oxide
#3
Terufumi Shimoda, Yasushi Obase, Yukio Nagasaka, Hiroshi Nakano, Reiko Kishikawa, Tomoaki Iwanaga
BACKGROUND: We previously reported the results of lung sound analysis in patients with bronchial asthma and demonstrated that the exhalation-to-inhalation sound pressure ratio in the low frequency range between 100 and 200 Hz (E/I LF) was correlated with the presence of airway inflammation and airway obstruction. We classified asthma patients by airway inflammation phenotype using the induced sputum eosinophil and neutrophil ratio and determined whether this phenotype could be predicted using E/I LF and fractional exhaled nitric oxide values...
March 16, 2017: Allergology International: Official Journal of the Japanese Society of Allergology
https://www.readbyqxmd.com/read/28303238/feasibility-of-a-peer-led-asthma-and-smoking-prevention-project-in-australian-schools-with-high-indigenous-youth
#4
Gabrielle B McCallum, Anne B Chang, Cate A Wilson, Helen L Petsky, Jan Saunders, Susan J Pizzutto, Siew Choo Su, Smita Shah
BACKGROUND: The high global burden of asthma and tobacco smoking among Indigenous people may potentially be reduced by appropriate interventions that target prevention of tobacco smoke uptake and improved asthma management. The latter includes targeted treatment based on airway inflammation. We undertook a feasibility study in two Darwin schools with a high proportion of Indigenous youth to determine the feasibility of an innovative, peer-led, school-based education program called the Asthma and Smoking Prevention Project (ASPP)...
2017: Frontiers in Pediatrics
https://www.readbyqxmd.com/read/28301273/a-cross-sectional-study-of-changes-in-markers-of-immunological-effects-and-lung-health-due-to-exposure-to-multi-walled-carbon-nanotubes
#5
Jelle Vlaanderen, Anjoeka Pronk, Nathaniel Rothman, Allan Hildesheim, Debra Silverman, H Dean Hosgood, Suzanne Spaan, Eelco Kuijpers, Lode Godderis, Peter Hoet, Qing Lan, Roel Vermeulen
Background Multi Wall Carbon nanotubes (MWCNTs) are manufactured nanomaterials to which workers and the general population will be increasingly exposed in coming years. Little is known about potential human health effects of exposure to MWCNTs, but effects on the lung and the immune system have been reported in animal and mechanistic studies. Objectives We conducted a cross-sectional study to assess the association between occupational exposure to MWCNTs and effects on lung health and the immune system. Methods We assessed fifty-one immune markers and three pneumoproteins in serum, complete blood cell counts (CBC), fractional exhaled nitric oxide (FENO), and lung function among twenty-two workers of a MWCNT producing facility and thirty-nine age- and gender-matched, unexposed controls...
March 16, 2017: Nanotoxicology
https://www.readbyqxmd.com/read/28298259/phenotypic-analysis-of-asthma-in-japanese-athletes
#6
Keisuke Tsukioka, Toshiyuki Koya, Hiroshi Ueno, Masachika Hayashi, Takuro Sakagami, Takashi Hasegawa, Masaaki Arakawa, Eiichi Suzuki, Toshiaki Kikuchi
BACKGROUND: Asthma in athlete populations such as Olympic athletes has various pathogeneses. However, few reports are available on the features of asthma in the athlete population in clinical practice. In this study, we focused on classifying asthma in Japanese athlete population. METHODS: We performed a cluster analysis of data from pulmonary function tests and clinical biomarkers before administering inhaled corticosteroids (ICS) therapy in athlete population of individuals diagnosed with asthma (n = 104; male, 76...
March 12, 2017: Allergology International: Official Journal of the Japanese Society of Allergology
https://www.readbyqxmd.com/read/28296234/association-between-fractional-exhaled-nitric-oxide-and-clinical-characteristics-and-outcomes-in-patients-with-subacute-cough
#7
Mingming Jiang, Min Liu, Ying Wang, Lili Xu, Xiaoning Bu, Li An, Hong Zhang, Kewu Huang
OBJECTIVE: To investigate the relationships between fractional exhaled nitric oxide (FENO) and clinical characteristics and outcomes in patients with subacute cough. METHODS: Patients with subacute cough (n = 189) after upper respiratory tract infection were enrolled in this single-center prospective study, and were divided into low- (<25 ppb) and high- (≥25 ppb) FENO groups. Empirical therapies (without inhaled or systemic corticosteroids) were prescribed based on clinical experience and follow-up until the disease course reached 8 weeks...
March 15, 2017: Clinical Respiratory Journal
https://www.readbyqxmd.com/read/28286341/rapid-adiposity-growth-increases-risks-of-new-onset-asthma-and-airway-inflammation-in-children
#8
Y-C Chen, A-H Chih, J-R Chen, T-H Liou, W-H Pan, Y L Lee
BACKGROUND/OBJECTIVES: We aim to (1) examine the influence of long-term adiposity status/ short-term adiposity changes on asthma with high or low fractional exhaled nitric oxide (FeNO), and (2) to determine the differences in long-term adiposity status/ short-term adiposity changes on atopy, airway inflammation, and pulmonary function. SUBJECTS/METHODS: We recruited 2450 fourth-to-sixth-grade children from the nationwide Taiwan Children Health Study. Data regarding various adiposity indicators, atopic status, pulmonary function tests, and asthma outcomes were collected annually...
March 13, 2017: International Journal of Obesity: Journal of the International Association for the Study of Obesity
https://www.readbyqxmd.com/read/28284319/longterm-clinical-outcomes-of-omalizumab-therapy-in-severe-allergic-asthma-study-of-efficacy-and-safety
#9
Adel H Mansur, Sapna Srivastava, Verity Mitchell, Julie Sullivan, Ismail Kasujee
Omalizumab has been shown to be an effective add-on therapy for patients with uncontrolled severe persistent allergic asthma. There has been a steady accumulation of evidence on the long-term effectiveness of omalizumab; however, data on real-life outcomes beyond one year of treatment is limited. In this study, we report on long-term outcomes of omalizumab treatment. We collected data from our severe asthma registry on hospitalisations, exacerbations, corticosteroid sparing, asthma control, lung function, biomarkers and side effects, to determine if the benefit was sustained and treatment was safe on the long term...
March 2017: Respiratory Medicine
https://www.readbyqxmd.com/read/28283167/a-perspective-on-fractional-exhaled-nitric-oxide-measurement-for-adherence-monitoring
#10
EDITORIAL
Myron Zitt
No abstract text is available yet for this article.
March 2017: Journal of Allergy and Clinical Immunology in Practice
https://www.readbyqxmd.com/read/28282228/evaluation-of-exhaled-breath-temperature-ebt-as-a-marker-and-predictor-of-asthma-exacerbation-in-children-and-adolescents
#11
Irena Wojsyk-Banaszak, Marcin Mikoś, Aleksandra Szczepankiewicz, Alicja Wielebska, Paulina Sobkowiak, Aleksandra Kamińska, Anna Bręborowicz
INTRODUCTION: Noninvasive and easy-to-use tools to monitor airway inflammation in asthma are needed to maintain disease control, particularly in pediatric population. The aim of the study was to evaluate exhaled breath temperature (EBT) in pediatric respiratory clinic setting. METHODS: We evaluated 37 children and adolescents with asthma (5-17 years; median: 11 years). The patients were followed up in stable condition and during exacerbations (paired observations in n = 19 subjects)...
March 10, 2017: Journal of Asthma: Official Journal of the Association for the Care of Asthma
https://www.readbyqxmd.com/read/28275474/effects-of-leukotriene-d4-nasal-challenge-on-bronchial-responsiveness-and-inflammation-in-asthmatic-patients-with-allergic-rhinitis
#12
Zheng Zhu, Yanqing Xie, Weijie Guan, Yi Gao, Rongquan Huang, Shu Xia, Wenhua Jian, Zhiyu Liang, Jinping Zheng
BACKGROUND: In asthmatic patients with allergic rhinitis (AR), increased cysteinyl leukotrienes (CysLTs) production in the secretion of nasal mucosa has been associated with greater bronchial hyperresponsiveness (BHR) after nasal allergen challenge. However, the role of CysLTs in eliciting BHR after nasal allergen challenge has not been evaluated. The aim of this study is to evaluate the effect of LTD4 nasal challenge on BHR and inflammation in asthmatic patients with AR. METHODS: In this self-controlled study, fifteen eligible consecutively recruited subjects underwent methacholine (Mch) bronchial provocation test before and 30 minutes after LTD4 nasal provocation test...
February 2017: Journal of Thoracic Disease
https://www.readbyqxmd.com/read/28265181/comparison-of-the-fractional-exhaled-nitric-oxide-levels-in-adolescents-at-three-schools-located-three-different-distances-from-a-large-steel-mill
#13
Murat Acat, Yusuf Aydemir, Onur Yazıcı, Mahmut Turğut, Mustafa Çörtük, Murat Çakar, Zehra Yaşar, Sami Deniz, Erdoğan Çetinkaya
Objectives. Exposure to ambient metals and air pollutants in urban environments has been associated with impaired lung health and inflammation in the lungs. Fractional exhaled nitric oxide (FeNO) is a reliable marker of airway inflammation. In this study, we aimed to compare the FeNO levels of three schools that have different distances from iron and steel industry zone for assessing the effects of heavy metals and air pollution on their respiratory health. Methods. Pulmonary function test and FeNO measurements were evaluated in 387 adolescents in three schools which have different distance from plant...
2017: Canadian Respiratory Journal: Journal of the Canadian Thoracic Society
https://www.readbyqxmd.com/read/28264494/omalizumab-is-equally-effective-in-persistent-allergic-oral-corticosteroid-dependent-asthma-caused-by-either-seasonal-or-perennial-allergens-a-pilot-study
#14
Christian Domingo, Xavier Pomares, Albert Navarro, Núria Rudi, Ana Sogo, Ignacio Dávila, Rosa M Mirapeix
Omalizumab is marketed for chronic severe asthma patients who are allergic to perennial allergens. Our purpose was to investigate whether omalizumab is also effective in persistent severe asthma due to seasonal allergens. Thirty patients with oral corticosteroid-dependent asthma were treated with Omalizumab according to the dosing table. For each patient with asthma due to seasonal allergens, we recruited the next two consecutive patients with asthma due to perennial allergens. The dose of oral methyl prednisolone was tapered at a rate of 2 mg every two weeks after the start of treatment with omalizumab depending on tolerance...
February 28, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28256388/utility-of-serum-periostin-in-combination-with-exhaled-nitric-oxide-in-the-management-of-asthma
#15
REVIEW
Tadao Nagasaki, Hisako Matsumoto, Kenji Izuhara
Type-2/eosinophilic inflammation plays a pivotal role in asthma. The identification of severe type-2/eosinophilic asthma is important for improving the management of patients with asthma. Therefore, efforts to develop non-invasive biomarkers for type-2/eosinophilic airway inflammation have been made during this decade. Currently, fraction of exhaled nitric oxide (FeNO) and serum periostin levels are considered markers of type-2/eosinophilic inflammation in asthma. However, a single-marker approach has limited the ability to diagnose severe type-2/eosinophilic asthma accurately and predict disease outcomes precisely...
February 27, 2017: Allergology International: Official Journal of the Japanese Society of Allergology
https://www.readbyqxmd.com/read/28253520/fractional-exhaled-nitric-oxide-a-potential-biomarker-in-allergic-rhinitis
#16
Giorgio Ciprandi, Fabio Gallo, Fabio Luigi Massimo Ricciardolo, Ignazio Cirillo
BACKGROUND: The fractional concentration of exhaled nitric oxide (FeNO) is a surrogate biomarker for Th2-dependent bronchial inflammation. The present study investigated whether FeNO may characterize allergic rhinitis (AR) patients. METHODS: A total of 553 AR patients (497 males, mean age 28.8 years) were evaluated. Those patients with a high FeNO underwent a 2-year follow-up. RESULTS: Increased FeNO was associated with a significantly longer AR duration, impaired lung function, more severe symptoms, and more frequent bronchial hyperresponsiveness (BHR)...
March 3, 2017: International Archives of Allergy and Immunology
https://www.readbyqxmd.com/read/28248547/serum-periostin-as-a-biomarker-for-comorbid-chronic-rhinosinusitis-in-patients-with-asthma
#17
Takamitsu Asano, Yoshihiro Kanemitsu, Masaya Takemura, Makoto Yokota, Kensuke Fukumitsu, Norihisa Takeda, Hiroya Ichikawa, Takehiro Uemura, Osamu Takakuwa, Hirotsugu Ohkubo, Ken Maeno, Yutaka Ito, Tetsuya Oguri, Yumi Maki, Junya Ono, Shoichiro Ohta, Yoshihisa Nakamura, Kenji Izuhara, Motohiko Suzuki, Akio Niimi
RATIONALE: Periostin is a matricellular protein that is involved in the pathophysiology of allergic rhinitis, chronic rhinosinusitis, and asthma. Associations of serum periostin with systemic and airway eosinophilic inflammation and comorbid chronic rhinosinusitis in patients with asthma have been demonstrated. Although serum periostin is positioned as a marker of helper T cell 2 (Th2) immune responses, its implication regarding the presence of comorbid upper airway diseases in patients with asthma remains unclear...
March 1, 2017: Annals of the American Thoracic Society
https://www.readbyqxmd.com/read/28248008/can-biomarkers-help-us-hit-targets-in-difficult-to-treat-asthma
#18
REVIEW
Michael Fricker, Liam G Heaney, John W Upham
Biomarkers may be a key foundation for the precision medicine of the future. In this article, we review current knowledge regarding biomarkers in difficult-to-treat asthma and their ability to guide the use of both conventional asthma therapies and novel (targeted) therapies. Biomarkers (as measured by tests including prednisolone and cortisol assays and the fractional exhaled nitric oxide (NO) suppression test) show promise in the assessment and management of non-adherence to inhaled and oral corticosteroids...
April 2017: Respirology: Official Journal of the Asian Pacific Society of Respirology
https://www.readbyqxmd.com/read/28246306/a-novel-method-of-measuring-fractional-exhaled-nitric-oxide-in-tracheostomized-ventilator-dependent-children
#19
Vydehi R Murthy, Hugo Escobar, Mike Norberg, Charisse I Lachica, Linda L Gratny, Ashley K Sherman, William E Truog, Winston M Manimtim
BACKGROUND: The lower airway concentration of fractional exhaled nitric oxide (FENO) is unknown in children with chronic lung disease of infancy who have tracheostomy for long-term mechanical ventilation. We aimed to evaluate an online method of measuring FENO in a cohort of ventilator-dependent children with a tracheostomy and to explore the relationship between the peak FENO concentration (FENO peak) and the degree of respiratory support using the respiratory severity score. METHODS: We conducted a prospective cross-sectional study in 31 subjects who were receiving long-term respiratory support through a tracheostomy...
February 28, 2017: Respiratory Care
https://www.readbyqxmd.com/read/28245677/prospective-evaluation-of-respiratory-health-benefits-from-reduced-exposure-to-airborne-particulate-matter
#20
Yanhui Hao, Guanghui Zhang, Bin Han, Xiaowen Xu, Nannan Feng, Yong Li, Wei Wang, Haidong Kan, Zhipeng Bai, Yiliang Zhu, William Au, Zhao-Lin Xia
We aimed to investigate if short-term exposure to reduced particulate matter (PM) air pollution would affect respiratory function in healthy adults. We followed a cohort of 42 healthy participants from a community afflicted with severe PM air pollution to a substantially less polluted area for nine days. We measured daily airborne PM [with an aerodynamic diameter of less than 2.5 μm (PM2.5) and 10 μm (PM10)] and PM2.5 carbon component concentrations. Five repeated respiratory function measurements and fractional exhaled nitric oxide test were made for each participant...
April 2017: International Journal of Environmental Health Research
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