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Exhaled nitric oxide

Mehrdad Behnia, Courtney M Wheatley, Alberto Avolio, Bruce D Johnson
BACKGROUND: During exercise as pulmonary blood flow rises, pulmonary capillary blood volume increases and gas exchange surface area expands through distention and recruitment. We have previously demonstrated that pulmonary capillary recruitment is limited in COPD patients with poorer exercise tolerance. Hypoxia and endothelial dysfunction lead to pulmonary vascular dysregulation possibly in part related to nitric oxide related pathways. PURPOSE: To determine if increasing dietary nitrate might influence lung surface area for gas exchange and subsequently impact exercise performance...
March 13, 2018: Nitric Oxide: Biology and Chemistry
Kamil Barański, Jan E Zejda
The aim of the study was to assess short-term repeatability of measurements of fractional exhaled nitric oxide (FENO) and its correlates in children in the 6- to 9-year age bracket participating in a respiratory epidemiological survey. FENO was measured in two sessions one week apart in 101 children. Participants were divided into three groups: asymptomatic (n = 76); symptomatic (n = 14); and asthma (n = 11). Absolute and relative differences between the measurements, as well as concordance correlation coefficients, were used in order to assess repeatability...
January 2018: Jornal Brasileiro de Pneumologia: Publicaça̋o Oficial da Sociedade Brasileira de Pneumologia e Tisilogia
João Cavaleiro Rufo, Inês Paciência, Diana Silva, Carla Martins, Joana Madureira, Eduardo de Oliveira Fernandes, Patrícia Padrão, Pedro Moreira, Luís Delgado, André Moreira
BACKGROUND: Endurance swimming exercises coupled to disinfection by-products exposure has been associated with increased airways dysfunction and neurogenic inflammation in elite swimmers. However, the impact of swimming pool exposure at a recreational level on autonomic activity has never been explored. Therefore, this study aimed to investigate how swimming pool attendance is influencing lung and autonomic function in school-aged children. METHODS: A total of 858 children enrolled a cross sectional survey...
2018: PloS One
Melanie Dreßler, Emilia Salzmann-Manrique, Stefan Zielen, Johannes Schulze
PURPOSE: Physical activity is an important part of life, and exercise-induced asthma (EIA) can reduce the quality of life. A standardized exercise challenge is needed to diagnose EIA, but this is a time consuming, effortful and expensive method. Exhaled nitric oxide (eNO) as a marker of eosinophil inflammation is determined rapidly and easily. The aim of this study was to investigate eNO as surrogate marker for predicting a positive reaction in an exercise challenge in a cold chamber (ECC)...
March 8, 2018: Nitric Oxide: Biology and Chemistry
Lucy Chambers, Joanne Finch, Karen Edwards, Antoine Jeanjean, Roland Leigh, Sherif Gonem
BACKGROUND: There is evidence that air pollution increases the risk of asthma hospitalisations and healthcare utilisation, but the effects on day-to-day asthma control are not fully understood. OBJECTIVE: We undertook a prospective single-centre panel study to test the hypothesis that personal air pollution exposure is associated with asthma symptoms, lung function and airway inflammation. METHODS: Thirty-two patients with a clinical diagnosis of asthma were provided with a personal air pollution monitor (Cairclip NO2 /O3 ) which was kept on or around their person throughout the 12-week follow-up period...
March 11, 2018: Clinical and Experimental Allergy: Journal of the British Society for Allergy and Clinical Immunology
Matthew Morten, Adam Collison, Vanessa E Murphy, Daniel Barker, Christopher Oldmeadow, John Attia, Joseph Meredith, Heather Powell, Paul D Robinson, Peter D Sly, Peter G Gibson, Joerg Mattes
BACKGROUND: The single-centre double-blind, randomised controlled Managing Asthma in Pregnancy (MAP) trial in Newcastle, Australia, compared a treatment algorithm using the fraction of exhaled nitric oxide (FeNO) in combination with asthma symptoms (FeNO group) against a treatment algorithm using clinical symptoms only (clinical group) in pregnant asthmatic women (ANZ Clinical Trials Registry, number 12607000561482). The primary outcome was a 50% reduction in asthma exacerbations during pregnancy in the FeNO group...
March 7, 2018: Journal of Allergy and Clinical Immunology
Sam Clifford, Mandana Mazaheri, Farhad Salimi, Wafaa Nabil Ezz, Bijan Yeganeh, Samantha Low-Choy, Katy Walker, Kerrie Mengersen, Guy B Marks, Lidia Morawska
It is known that ultrafine particles (UFP, particles smaller than 0.1 μm) can penetrate deep into the lungs and potentially have adverse health effects. However, epidemiological data on the health effects of UFP is limited. Therefore, our objective was to test the hypothesis that exposure to UFPs is associated with respiratory health status and systemic inflammation among children aged 8 to 11 years. We conducted a cross-sectional study among 655 children (43.3% male) attending 25 primary (elementary) schools in the Brisbane Metropolitan Area, Australia...
March 4, 2018: Environment International
Paraskevi Xepapadaki, Claus Bachert, Susetta Finotto, Tuomas Jartti, George N Konstantinou, Alexander Kiefer, Marek Kowalski, Anna Lewandowska-Polak, Heikki Lukkarinen, Eirini Roumpedaki, Anna Sobanska, Ina Sintobin, Tytti Vuorinen, Nan Zhang, Theodor Zimmermann, Nikolaos G Papadopoulos
BACKGROUND: The PreDicta cohort was designed to prospectively evaluate wheeze/asthma persistence in preschoolers in association to viral/microbial exposures and immunological responses. We present the cohort design, demographic/disease characteristics and evaluate unsupervised and predefined phenotypic subgroups at inclusion. METHODS: PreDicta is a 2-year prospective study conducted in five European regions, including children 4-6 years with a diagnosis of asthma as cases and healthy age-matched controls...
March 7, 2018: Pediatric Allergy and Immunology
Qi Gao, Huijie Huang, Kang Zhu, Xiaoying Liu, Xiaoling Hou, Hui Guan, Yongge Liu, Deli Xin, Li Xiang, Kunling Shen, Xin Ni
In the current study, we sought to track the clinical course of children under control-based asthma management and focused on respiratory pathogens monitoring. We prospectively explored influencing factors for asthma control. 121 children with uncontrolled asthma between 3-14 years of age were recruited. Common respiratory pathogens were detected with pharyngeal swabs and serum aeroallergen-specific IgE was measured. Numeric asthma control scores, airway resistance and fractional concentrations of exhaled nitric oxide (FENO) were evaluated...
February 2018: Iranian Journal of Allergy, Asthma, and Immunology
Mahboobeh Haji Sadeghi, Caroline E Wright, Simon Hart, Michael Crooks, Alyn Morice
BACKGROUND: Whether the fraction of exhaled nitric oxide (FeNO) measurement can predict the response to anti-inflammatory treatment in chronic cough is unknown. OBJECTIVE: To explore whether the effectiveness of treatment with 10 mg of montelukast or 20 mg of prednisolone in patients with chronic cough is predicted by FeNO level. METHODS: In this randomized, open-label, controlled pilot study conducted in the Clinical Trial Unit in Castle Hospital in the United Kingdom, 50 nonsmoking patients with a cough that lasted more than 8 weeks were sequentially enrolled in the study...
March 2018: Annals of Allergy, Asthma & Immunology
Ina Gümperlein, Elke Fischer, Gisela Dietrich-Gümperlein, Stefan Karrasch, Dennis Nowak, Rudolf A Jörres, Rudolf Schierl
3D printers are increasingly run at home. Nanoparticle emissions from those printers have been reported, which raises the question whether adverse health effects from ultrafine particles (UFP) can be elicited by 3D printers. We exposed 26 healthy adults in a single-blinded, randomized, cross-over design to emissions of a desktop 3D printer using fused deposition modeling (FDM) for one hour (high UFP-emitting acrylonitrile butadiene styrene (ABS) versus low-emitting polylactic acid (PLA)). Before and after exposures, cytokines (IL-1β, IL-6, TNF-α, INF-γ) and ECP in nasal secretions, exhaled nitric oxide (FeNO), urinary 8-isoprostaglandin F2α (8-iso PGF2α ) and self-reported symptoms were assessed...
March 3, 2018: Indoor Air
Alexandra Thornadtsson, Anders Lind, Tomas Weitoft, Marieann Högman
BACKGROUND: Rheumatoid arthritis (RA) is an autoimmune disorder characterized by bone and joint destruction, but other organ systems can also be involved. Recent studies have suggested that the disease may start in the lungs. Exhaled nitric oxide (FE NO) is a marker of inflammation. The aims of the study were to compare the NO parameters between subjects with RA and healthy control subjects, and to examine whether the NO parameters correlated with lung function and disease activity in the subjects with RA...
February 24, 2018: Nitric Oxide: Biology and Chemistry
Rihuang Qiu, Jiaxing Xie, Kian Fan Chung, Naijian Li, Zhaowei Yang, Mengzhang He, Jing Li, Rongchang Chen, Nanshan Zhong, Qingling Zhang
BACKGROUND: Asthma is a heterogeneous disease with diverse clinical manifestations and inflammatory pathologies that is punctuated by exacerbations. OBJECTIVES: To describe the clinical and inflammatory characteristics of asthma patients treated in hospital for an acute exacerbation. METHODS: Data from 320 adult patients receiving treatment for an acute exacerbation of asthma were obtained. In 218 with complete data , we used Ward's hierarchical clustering to obtain clusters...
February 22, 2018: Journal of Allergy and Clinical Immunology in Practice
E Henckel, U Svenson, B Nordlund, E Berggren Broström, G Hedlin, S Degerman, K Bohlin
AIM: Inflammation is a major factor in the pathophysiology of bronchopulmonary dysplasia (BPD) and it contributes to accelerated telomere shortening and cellular aging. This study aimed to determine its effect on telomere length and lung function in school-aged children born preterm with BPD. METHODS: We examined 29 children with BPD, born preterm in Stockholm county 1998-99, along with 28 children with allergic asthma born at term matched for age and gender. At 10 years of age, we measured relative telomere length (RTL) in blood by quantitative polymerase chain reaction, lung function by spirometry and inflammation by fractional exhaled nitric oxide and blood cytokines...
February 24, 2018: Acta Paediatrica
Amaryllis Haccuria, Alain Van Muylem, Andrei Malinovschi, Vi Doan, Alain Michils
Abnormal airway reactivity and overproduction of nitric oxide (NO) occurring in small airways have been found in asthma. If the "one airway, one disease" concept is consistent, such dysfunctions should also be detected in the peripheral airways of patients suffering from allergic rhinitis.We investigated whether peripheral airway reactivity and NO overproduction could be documented in distal airways in patients with allergic rhinitis. Exhaled NO fraction ( F eNO ) and the slope (S) of phase III of the single-breath washout test (SBWT) of helium (He) and sulfur hexafluoride (SF6 ) were measured in 31 patients with allergic asthma, 23 allergic rhinitis patients and 24 controls, before and after sputum induction...
February 2018: European Respiratory Journal: Official Journal of the European Society for Clinical Respiratory Physiology
Zhanlan Fan, Vivian C Pun, Xiao-Cui Chen, Qiu Hong, Linwei Tian, Steven Sai-Hang Ho, Shun-Cheng Lee, Lap Ah Tse, Kin-Fai Ho
BACKGROUND: Given the lack of research on the personal exposure to fine particles (PM2.5 ) in Hong Kong, we examined the association between short-term personal exposure to PM2.5 and their constituents and inflammation in exhaled breath in a sample of healthy adult residents. METHOD: Forty-six participants underwent personal PM2.5 monitoring for averagely 6 days to obtain 276 samples. Fractional exhaled nitric oxide (FeNO), a biomarker of inflammation in exhaled breath, was measured at the end of each 24-h personal monitoring...
February 17, 2018: Environmental Research
David Fishwick, Steve Forman
PURPOSE OF REVIEW: The outcome for workers with occupational asthma is improved for those with an earlier diagnosis. Health surveillance at work is in principle designed to identify such cases, so that the risks to the individual worker, and coworkers, can be reduced. There is recent evidence to suggest that the uptake and quality of such surveillance could be improved. This review has assessed current approaches to health surveillance for occupational asthma. RECENT FINDINGS: The article covers a review of the utility of questionnaires, lung function testing, immunological investigations, and other tests, including exhaled nitric oxide, sputum eosinophilia, and exhaled breath condensate specifically in the context of workplace-based health surveillance...
February 15, 2018: Current Opinion in Allergy and Clinical Immunology
Tsunahiko Hirano, Kazuto Matsunaga
Because the pathophysiology of asthma has diverse characteristics, to manage the disease effectively, it is important for clinicians to distinguish among the clinical phenotypes. Among them, adult-onset asthma, that is, late-onset asthma (LOA), is increasing because of the aging of the population. The phenotype of LOA is largely divided into two types according to the presence or absence of eosinophilic inflammation, T-helper (Th)2- and non-Th2-associated LOA. Especially in Th2 LOA related to rhinosinusitis, as pulmonary function at onset is poor and asthma exacerbations occur frequently, it is important to detect this phenotype in the early phase by using a biomarker of Th2-type inflammation such as fractional exhaled nitric oxide (FE NO )...
2018: Journal of Asthma and Allergy
Hanneke Coumou, Guus A Westerhof, Selma B de Nijs, Aeilko H Zwinderman, Elisabeth H Bel
Little is known about the prognosis of adults with new-onset asthma. Cross-sectional studies suggest that these patients may exhibit accelerated decline in forced expiratory volume in 1 s (FEV1 ). However, risk factors for accelerated decline in lung function have not yet been identified.We aimed to identify these risk factors in a prospective 5-year follow-up study in 200 adults with newly diagnosed asthma. In the current study, clinical, functional and inflammatory parameters were assessed annually for 5 years...
February 2018: European Respiratory Journal: Official Journal of the European Society for Clinical Respiratory Physiology
Jian Hou, Huizhen Sun, Yun Zhou, Youjian Zhang, Wenjun Yin, Tian Xu, Juan Cheng, Weihong Chen, Jing Yuan
Diabetes is related to exposure to polycyclic aromatic hydrocarbons (PAHs), inflammation in the body and housing characters. However, associations of urinary monohydroxy-PAHs (OH-PAHs) or fractional exhaled nitric oxide (FeNO) with diabetes risk in relation to housing characters are unclear. In this study, 2645 individuals were drawn from the baseline survey of the Wuhan-Zhuhai Cohort Study. Associations of diabetes with urinary OH-PAHs or FeNO among cooking participants were estimated using logistics regression models...
February 14, 2018: Indoor Air
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