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https://www.readbyqxmd.com/read/29231775/the-airway-hyperresponsiveness-to-methacholine-may-be-predicted-by-impulse-oscillometry-and-plethysmography-in-children-with-well-controlled-asthma
#1
Tugba Arıkoglu, Ayyuce Unlu, Didem Derici Yıldırım, Semanur Kuyucu
OBJECTIVE: Airway hyperresponsiveness (AHR) is a hallmark of asthma. Methacholine challenge test which is mostly used to confirm AHR is not routinely available. The aim of this study was to investigate the predictive values of fractional exhaled nitric oxide (FeNO), impulse oscillometry (IOS), and plethysmography for the assessment of AHR in children with well-controlled asthma. METHODS: 60 children with controlled allergic asthma aged 6-18 years participated in the study...
December 12, 2017: Journal of Asthma: Official Journal of the Association for the Care of Asthma
https://www.readbyqxmd.com/read/29223148/exhaled-nitric-oxide-helps-discriminating-asthmatic-children-with-and-without-positive-specific-ige-to-aeroallergens
#2
Li-Ching Fang, Shyh-Dar Shyur, Jun Yang, Jen-Yu Wang, Yu-Hsuan Kao, Chien-Hui Yang, Yu-Ting Yu
BACKGROUND: Aeroallergen sensitization may predict higher fractional exhaled nitric oxide (FeNO) levels. OBJECTIVE: We evaluate cut-off values of FeNO in asthmatic children with and without positive specific immunoglobulin E (IgE) to at least one of 5 aeroallergens (Dermatophagoides pteronyssinus, Dermatophagoides farinae, cat, dog, and cockroach). METHODS: 564 patients with asthma and allergic rhinitis (AR) aged 5 to 18 years were enrolled into two groups...
December 10, 2018: Asian Pacific Journal of Allergy and Immunology
https://www.readbyqxmd.com/read/29212496/pulmonary-function-exhaled-nitric-oxide-and-symptoms-in-asthma-patients-with-obesity-a-cross-sectional-study
#3
Marise J Kasteleyn, Tobias N Bonten, Renée de Mutsert, Willemien Thijs, Pieter S Hiemstra, Saskia le Cessie, Frits R Rosendaal, Niels H Chavannes, Christian Taube
BACKGROUND: Obesity is a risk factor for the development of asthma. In patients with obesity the diagnosis of asthma is often based on symptoms, but without objective measurements. Nevertheless, obesity-associated asthma is recognized as a distinct asthma phenotype. Therefore, this study explores lung function and symptoms in asthma patients with and without obesity. METHODS: The Netherlands Epidemiology of Obesity (NEO) study is a population-based cohort study with 6671 participants (aged 45-65 years) of whom 472 had asthma...
December 7, 2017: Respiratory Research
https://www.readbyqxmd.com/read/29202821/effects-of-treatment-changes-on-asthma-phenotype-prevalence-and-airway-neutrophil-function
#4
Collin R Brooks, Christine J Van Dalen, Elizabeth Harding, Ian F Hermans, Jeroen Douwes
BACKGROUND: Asthma inflammatory phenotypes are often defined by relative cell counts of airway eosinophils/neutrophils. However, the importance of neutrophilia remains unclear, as does the effect of ICS treatment on asthma phenotypes and airway neutrophil function. The purpose of this study was to assess asthma phenotype prevalence/characteristics in a community setting, and, in a nested preliminary study, determine how treatment changes affect phenotype stability and inflammation, with particular focus on airway neutrophils...
December 4, 2017: BMC Pulmonary Medicine
https://www.readbyqxmd.com/read/29186624/local-and-systemic-inflammation-may-mediate-diesel-engine-exhaust-induced-lung-function-impairment-in-a-chinese-occupational-cohort
#5
Haitao Wang, Huawei Duan, Tao Meng, Mo Yang, Lianhua Cui, Ping Bin, Yufei Dai, Yong Niu, Meili Shen, Liping Zhang, Yuxin Zheng, Shuguang Leng
Diesel exhaust (DE) as the major source of vehicle-emitted particle matter in ambient air impairs lung function. The objectives were to assess the contribution of local (e.g., the fraction of exhaled nitric oxide [FeNO] and serum Club cell secretory protein [CC16]) and systemic (e.g., serum C-reaction protein [CRP] and interleukin-6 [IL-6]) inflammation to DE induced lung function impairment using a unique cohort of diesel engine testers (DET, n = 137) and non-DETs (n = 127), made up of current and non-current smokers...
November 23, 2017: Toxicological Sciences: An Official Journal of the Society of Toxicology
https://www.readbyqxmd.com/read/29180311/repeated-fractional-exhaled-nitric-oxide-measurements-is-not-essential-for-asthma-screening
#6
Y Seo Yeon, K Yoon Hee, B Min Kwang, K Hyung Jung, A Chul Min, K Seong Han, L Hye Sun, P Hye Jung
BACKGROUND AND OBJECTIVE: Although older guidelines recommend that fractional exhaled nitric oxide (FeNO) should be checked more than twice during the same session for an asthma diagnosis, recent studies showed the excellent reproducibility of FeNO measurements. Objective: We aimed to determine whether repeated FeNO measurements during the same session are necessary for asthma screening. METHODS: We retrospectively reviewed the electronic medical records of adult outpatient subjects who visited the pulmonary department for an asthma diagnosis and assessed FeNO measurements obtained from June 2016 to July 2017...
November 28, 2017: Journal of Investigational Allergology & Clinical Immunology
https://www.readbyqxmd.com/read/29177539/does-feno-predict-clinical-characteristics-in-chronic-cough
#7
Mahboobeh Haji Sadeghi, Caroline E Wright, Simon Hart, Michael Crooks, Alyn H Morice
PURPOSE: To evaluate whether exhaled nitric oxide measurement can facilitate in the assessment of chronic cough patients based on their airway inflammatory phenotype. METHODS: We have studied consecutive patients attending a specialist cough clinic. 30 patients with high FeNO (> 30 ppb) and 20 patients with low FeNO (< 20 ppb) were recruited. RESULTS: There was a significant correlation between FeNO, B-Eos and sputum eosinophil count (p < 0...
November 25, 2017: Lung
https://www.readbyqxmd.com/read/29173448/fractional-exhaled-nitric-oxide-and-multiple-breath-nitrogen-washout-in-preschool-healthy-and-asthmatic-children
#8
Lea Vilmann, Frederik Buchvald, Kent Green, Kim Gjerum Nielsen
INTRODUCTION: Objectively assessing pulmonary disease is challenging in preschool children with asthma. We evaluated the feasibility of measuring fractional exhaled nitrogen oxide (FeNO) and multiple breath nitrogen washout (N2MBW) in children. We compared their capacities for discriminating between children with asthma and healthy controls. METHODS: We measured FeNO and N2MBW-derived indices of lung clearance (LCI2.5) and conductive and acinar ventilation heterogeneity (Scond and Sacin) in 65 preschool children; 35 with physician-diagnosed asthma and 30 healthy...
December 2017: Respiratory Medicine
https://www.readbyqxmd.com/read/29168228/trajectory-of-spirometric-and-exhaled-nitric-oxide-measurements-in-chinese-schoolchildren-with-asthma
#9
Ting F Leung, Man F Tang, Agnes S Y Leung, Wilson W S Tam, Hing Y Sy, Gary W K Wong
BACKGROUND: Lung function growth occurs in most asthmatic children. A subgroup has subnormal lung function trajectory, but such data is limited in children. This prospective study characterized longitudinal changes of spirometric indices and fractional exhaled nitric oxide level (FeNO) among asthmatic children and identified their genetic and environmental determinants. METHODS: Chinese asthmatic children recruited from paediatric clinics underwent 5-year follow-up for pre-bronchodilator spirometric indices and FeNO...
November 23, 2017: Pediatric Allergy and Immunology
https://www.readbyqxmd.com/read/29167414/biomarkers-related-to-respiratory-symptoms-and-lung-function-in-adults-with-asthma
#10
Lucia Calciano, Laura Portas, Angelo Guido Corsico, Mario Olivieri, Paolo Degan, Marcello Ferrari, Alessandro Fois, Anna Maria Fratta Pasini, Andrea Pasini, Maria Elisabetta Zanolin, Roberto de Marco, Simone Accordini
There is a need for easily measurable biomarkers that are able to identify different levels of asthma severity. Aim. To assess the association between peripheral blood cell counts, fractional nitric oxide in exhaled air (FeNO), urinary biomarkers of oxidative stress (8-hydroxy-2'-deoxyguanosine and 8-isoprostane), and asthma severity in adult patients from the general population. Methods. In the Gene Environment Interactions in Respiratory Diseases study, 287 subjects with asthma (aged 20-64) were identified from the general population in Verona (Italy) (2008-2010)...
November 23, 2017: Journal of Breath Research
https://www.readbyqxmd.com/read/29153414/association-of-interleukin-1-receptor-like-1-gene-polymorphisms-with-eosinophilic-phenotype-in-japanese-adults-with-asthma
#11
Hideki Inoue, Isao Ito, Akio Niimi, Hisako Matsumoto, Tsuyoshi Oguma, Tomoko Tajiri, Toshiyuki Iwata, Tadao Nagasaki, Yoshihiro Kanemitsu, Toshitaka Morishima, Tomomitsu Hirota, Mayumi Tamari, Sally E Wenzel, Michiaki Mishima
BACKGROUND: IL1RL1 (ST2) is involved in Th2 inflammation including eosinophil activation. Single nucleotide polymorphisms (SNPs) of the IL1RL1 gene are associated with asthma development and increased peripheral blood eosinophil counts. However, the association between IL1RL1 SNPs and eosinophilic phenotype among adults with asthma remains unexplored. METHODS: In a primary cohort of 110 adult Japanese patients with stable asthma, we examined the associations between IL1RL1 SNPs and clinical measurements including forced expiratory volume (FEV1), airway reversibility of FEV1, exhaled nitric oxide (FeNO), serum soluble-ST2 (sST2) levels, peripheral blood eosinophil differentials and serum total IgE level...
November 2017: Respiratory Investigation
https://www.readbyqxmd.com/read/29150070/decreased-expression-of-indolamine-2-3-dioxygenase-in-childhood-allergic-asthma-and-its-inverse-correlation-with-fractional-concentration-of-exhaled-nitric-oxide
#12
Ying Hu, Zhiqiang Chen, Ling Jin, Mei Wang, Wei Liao
BACKGROUND: The tryptophan metabolic pathway mediated by indolamine 2,3-dioxygenase (IDO), a tryptophan-degrading enzyme, plays an important role in controlling the development of allergic inflammation. The fractional concentration of exhaled nitric oxide (FeNO) is closely associated with the allergic state and is extensively used for the clinical evaluation of airway allergic inflammation. Clinical trials have rarely assessed the expression of IDO in childhood allergic asthma and its correlation with FeNO...
November 2017: Annals of Allergy, Asthma & Immunology
https://www.readbyqxmd.com/read/29149738/associations-of-urinary-polycyclic-aromatic-hydrocarbon-metabolites-with-fractional-exhaled-nitric-oxide-and-exhaled-carbon-monoxide-a-cross-sectional-study
#13
Yun Zhou, Yuewei Liu, Huizhen Sun, Jixuan Ma, Lili Xiao, Limin Cao, Wei Li, Bin Wang, Jing Yuan, Weihong Chen
Exposure to Polycyclic aromatic hydrocarbons (PAHs) has been associated with inflammatory responses. Fractional exhaled nitric oxide (FeNO) and exhaled carbon monoxide (eCO) are both important inflammatory mediators especially in airways. However, few studies have investigated associations of PAH exposures with FeNO or eCO. Therefore, we aimed to quantify the associations of urinary PAH metabolites with FeNO and eCO levels, and investigate their potential effect modifiers by linear mixed models among 4133 participants from the Wuhan-Zhuhai cohort in China...
November 14, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/29143374/asthma-and-lung-function-in-adulthood-after-a-viral-wheezing-episode-in-early-childhood
#14
Katri Backman, Hertta Ollikainen, Eija Piippo-Savolainen, Kirsi Nuolivirta, Matti Korppi
BACKGROUND: Viral etiology of infection has a significant role in the long-term outcome of early-childhood wheezing. OBJECTIVE: This study examines asthma and lung function in adulthood after early-childhood wheezing induced by respiratory syncytial virus (RSV) and rhinovirus (RV). METHODS: A total of 100 children were hospitalized for a wheezing episode at less than 24 months of age from 1992 to 1993 in Kuopio University Hospital (Finland)...
November 16, 2017: Clinical and Experimental Allergy: Journal of the British Society for Allergy and Clinical Immunology
https://www.readbyqxmd.com/read/29133224/feno-and-exercise-testing-in-children-at-risk-of-asthma
#15
Ann-Marie Malby Schoos, Christina Figgé Christiansen, Jakob Stokholm, Klaus Bønnelykke, Hans Bisgaard, Bo Lund Chawes
BACKGROUND: Exercise testing is the gold standard for diagnosing exercise-induced bronchoconstriction in children, but requires considerable cooperation and medical resources. Therefore, fraction of exhaled nitric oxide (FeNO) has been proposed as a tool to predict the need for exercise testing. OBJECTIVE: The objective of this study was to investigate the relationship between FeNO, exercise test results, and a history of respiratory symptoms during exercise in children at risk of asthma...
November 10, 2017: Journal of Allergy and Clinical Immunology in Practice
https://www.readbyqxmd.com/read/29128336/the-value-of-fractional-exhaled-nitric-oxide-and-forced-mid-expiratory-flow-as-predictive-markers-of-bronchial-hyperresponsiveness-in-adults-with-chronic-cough
#16
Wuping Bao, Xue Zhang, Chengjian Lv, Luhong Bao, Junfeng Yin, Zhixuan Huang, Bing Wang, Xin Zhou, Min Zhang
BACKGROUND: Bronchial provocation tests are standard for diagnosing the etiology of chronic cough, but they are time consuming and can induce severe bronchospasm. A safer and faster clinical examination to predict bronchial hyperresponsiveness (BHR) is needed. OBJECTIVE: The objective of this study was to investigate whether small-airway function tests can predict BHR in adult patients with chronic cough. METHODS: A retrospective, cross-sectional study of diagnoses made using spirometry and bronchial provocation test results was performed in 290 patients with chronic nonproductive cough...
November 8, 2017: Journal of Allergy and Clinical Immunology in Practice
https://www.readbyqxmd.com/read/29118577/associations-between-occupational-inhalation-risks-and-feno-levels-in-airway-obstruction-patients-results-from-the-national-health-and-nutrition-examination-survey-2007-2012
#17
Yi-Chih Huang, Mei-Chen Yang
Purpose: To investigate associations between occupational inhalation risks and fractional exhaled nitric oxide (FeNO) levels in patients with chronic obstructive pulmonary disease (COPD). Patients and methods: Data of 16,486 subjects who had undergone spirometry with pre-bronchodilator and post-bronchodilator lung function assessment were retrieved from the National Health and Nutrition Examination Survey, 2007-2012 database. After excluding 2,638 subjects with missing spirometry values, data of 13,336 subjects were included for analysis...
2017: International Journal of Chronic Obstructive Pulmonary Disease
https://www.readbyqxmd.com/read/29110960/the-clinical-role-of-fractional-exhaled-nitric-oxide-in-asthma-control
#18
Suguru Sato, Junpei Saito, Atsuro Fukuhara, Manabu Uematsu, Yasuhito Suzuki, Ryuichi Togawa, Yuki Sato, Takefumi Nikaido, Xintao Wang, Yoshinori Tanino, Mitsuru Munakata
BACKGROUND: The potential role and characteristics of fractional exhaled nitric oxide (FeNO) remain unclear in the treatment of asthma. OBJECTIVE: To explore the clinical role of FeNO in asthmatic treatment. METHODS: We evaluated whether the mean or change of FeNO levels in the treatment period is associated with other conventional control parameters and predicted some clinical outcomes of asthma. We retrospectively analyzed the mean and percentage change of FeNO levels in the first 5 measurements at our hospital...
October 27, 2017: Annals of Allergy, Asthma & Immunology
https://www.readbyqxmd.com/read/29108938/fractional-exhaled-nitric-oxide-as-a-predictor-of-response-to-inhaled-corticosteroids-in-patients-with-non-specific-respiratory-symptoms-and-insignificant-bronchodilator-reversibility-a-randomised-controlled-trial
#19
David B Price, Roland Buhl, Adrian Chan, Daryl Freeman, Elizabeth Gardener, Clifford Godley, Kevin Gruffydd-Jones, Lorcan McGarvey, Ken Ohta, Dermot Ryan, Jörgen Syk, Ngiap Chuan Tan, TzeLee Tan, Mike Thomas, Sen Yang, Priyanka Raju Konduru, Marcus Ngantcha, Martina Stagno d'Alcontres, Therese S Lapperre
BACKGROUND: Chronic non-specific respiratory symptoms are difficult to manage. This trial aimed to evaluate the association between baseline fractional exhaled nitric oxide (FeNO) and the response to inhaled corticosteroids in patients with non-specific respiratory symptoms. METHODS: In this double-blind randomised placebo-controlled trial, we enrolled undiagnosed patients, aged 18-80 years, with cough, wheeze, or dyspnoea and less than 20% bronchodilator reversibility across 26 primary care centres and hospitals in the UK and Singapore...
November 3, 2017: Lancet Respiratory Medicine
https://www.readbyqxmd.com/read/29098476/influence-of-air-pollution-on-airway-inflammation-and-disease-activity-in-childhood-systemic-lupus-erythematosus
#20
Andressa Guariento Ferreira Alves, Maria Fernanda de Azevedo Giacomin, Alfésio Luis Ferreira Braga, Adriana Maluf Elias Sallum, Luiz Alberto Amador Pereira, Luis Carlos Farhat, Fernando Louzada Strufaldi, Ana Julia de Faria Coimbra Lichtenfels, Tômas de Santana Carvalho, Naomi Kondo Nakagawa, Clovis Artur Silva, Sylvia Costa Lima Farhat
Exposure to fine particles may trigger pulmonary inflammation/systemic inflammation. The objective of this study was to investigate the association between daily individual exposure to air pollutants and airway inflammation and disease activity in childhood-onset systemic lupus erythematosus (cSLE) patients. A longitudinal panel study was carried out in 108 consecutive appointments with cSLE patients without respiratory diseases. Over four consecutive weeks, daily individual measures of nitrogen dioxide (NO2), fine particulate matter (PM2...
November 2, 2017: Clinical Rheumatology
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